TECHNICAL FIELD
[0001] The present disclosure relates to a field of hoists, and more particularly to a Koepe
hoist.
BACKGROUND
[0002] Normally, a friction hoisting system includes two conveyances, a plurality of ropes
such as steel head ropes and steel tail ropes, a friction drum, a deflection sheave
(or two head sheaves) and a motor. The Koepe hoist (also known as the friction hoist
in the art) with a plurality of ropes is operated by the friction generated between
the ropes winding the friction drum and friction liners. The steel head ropes are
placed on the friction drum, and generally, conveyances are hung at both ends of the
head ropes, or a conveyance is hung at one end and a counterweight is hung at the
other end. The tail ropes may be provided at the bottom of the conveyance or the counterweight.
The tail ropes are used for balancing the weights at the two ends of the steel head
ropes and thus motor power used may be reduced. When the friction drum works, the
friction liners are pressed by the steel head ropes to generate a friction force.
Under this friction force, the head ropes move together with the friction drum to
transform the conveyance up or down.
[0003] However, in a shaft where the Koepe hoist works, due to moisture, water or corrosive
mist such as acid, alkali and salt mist, the steel ropes may be corroded, which causes
corrosion, deformation and diameter reduction of the steel rope, thus shortening the
service life of the steel ropes. An existing method for avoiding the corrosion is
galvanization, which may results in increased rigidity and decreased flexibility of
the galvanized steel ropes. However, the steel ropes may be corroded when the galvanization
is damaged.
[0004] In addition, with the increase of the hoisting distance and payload, especially in
a deep shaft or a ultra-deep shaft, the number of the steel ropes and the diameter
of the friction drum required for the Koepe hoist are correspondingly increased, and
thus the weight of the head rope and the volume and weight of the friction drum are
also significantly increased, resulting in problems such as a large weight, a small
payload capacity, a low hoisting efficiency, a short service life and a frequent replacement
of steel ropes, which negatively affects transportation and installation and increases
the cost.
[0005] Therefore, there is still a need to provide a Koepe hoist with a reduced size, an
increased payload capacity and an improved efficiency in the art.
SUMMARY
[0006] The present disclosure seeks to solve at least one of the problems that exist in
the related art to at least some extent. Accordingly, an object of the present disclosure
is to provide a Koepe hoist, which may effectively solve the corrosion problem of
the steel rope in the corrosive environment, and significantly reduce the diameter
of the single steel rope, the diameter of the friction drum, and the volume and weight
of the friction drum, so as to realize the miniaturization of the Koepe hoist. With
such a Koepe hoist, the product cost can be reduced, and the payload capacity and
the hoisting efficiency of the Koepe hoist can be improved, to allow the Koepe hoist
to work safely, stably and efficiently.
[0007] In order to achieve the above object, the present disclosure provides in embodiments
a Koepe hoist, including: a friction drum, wherein at least one limit groove is formed
in a circumferential direction of the friction drum, a corner formed by a side surface
and a bottom surface of the limit groove has an angle of 110° to 150°, and is rounded
off; a main shaft device passing through the friction drum and being fixed with the
friction drum; a driving device connected to the friction drum to drive the friction
drum to rotate; a braking mechanism connected to the friction drum to drive the friction
drum to decelerate or stop rotating; and at least one hoisting composite belt, wherein
each hoisting composite belt comprises: a polymer composite layer, and a plurality
of steel or fiber ropes embedded in the polymer composite layer.
[0008] With the Koepe hoist according to the above embodiments of the present disclosure,
on the one hand, by replacing the existing steel head rope with the hoisting composite
belt, the steel or fiber ropes inside the hoisting composite belt can be prevented
from contacting with the external environment, and thus the corrosion caused by the
external environment such as moisture, water or corrosive mist can be avoided, and
a slip phenomenon can be also avoided since the friction coefficient of the hoisting
composite belt and the friction drum is improved by the polymer composite layer as
the outer layer of the hoisting composite belt. Compared with the steel head rope
used in the related art, under same hoisting distance and payload, the hoisting composite
belt of the present disclosure can further reduce the diameter of the steel or fiber
rope and the diameter of the friction drum matched with the hoisting composite belt,
thus significantly reducing the volume and weight of the friction drum and the equipment
cost. On the other hand, in the present disclosure, by providing the limit groove
on the friction drum and defining the angle between the side surface and the bottom
surface of the limit groove in a range of 110° to 150°, the movement direction of
the hoisting composite belt can be adjusted to prevent the hoisting composite belt
from being deviated from its normal position and/or avoid collision and overlap when
multiple hoisting composite belts are used in parallel, the weight of the friction
drum may be further reduced, to allow the Koepe hoist to work safely, stably and efficiently.
Moreover, the corner formed by the side surface and the bottom surface of the limit
groove is rounded off to avoid stress concentration at the place where the edge of
the hoisting composite belt is in contact with the limit groove during the hoisting
operation, thus avoiding damages to the edge of the hoisting composite belt. Therefore,
the Koepe hoist of the present disclosure may effectively solve the corrosion problem
of the steel rope in the corrosive environment, and significantly reduce the diameter
of the single steel rope, the diameter of the friction drum, and the volume and weight
of the friction drum, so as to realize the miniaturization of the Koepe hoist. With
such a Koepe hoist, the product cost can be reduced, and the payload capacity and
the hoisting efficiency of the Koepe hoist can be improved, to allow the Koepe hoist
to work safely, stably and efficiently.
[0009] In addition, the Koepe hoist according to the above embodiments of the present disclosure
may also have the following additional technical features.
[0010] In an embodiment of the present disclosure, when one limit groove is formed at a
surface of the friction drum, the bottom surface of the limit groove has a width ranging
from 803 to 3008 mm, preferably from 803 to 1008 mm; or when a plurality of limit
grooves are formed at the surface of the friction drum, the bottom surface of the
limit groove has a width ranging from 103 to 808 mm, preferably from 203 to 458 mm.
[0011] In an embodiment of the present disclosure, a distance between centerlines of two
adjacent limit grooves is not less than 250 mm.
[0012] In an embodiment of the present disclosure, the Koepe hoist has a ratio of a depth
of the limit groove to a thickness of the hoisting composite belt in a range of (0.5
to 1.1) : 1, preferably in a range of (0.6 to 1) : 1, and/or a ratio of the width
of the bottom surface to a width of the hoisting composite belt in a range of (1.01
to 1.06): 1, preferably in a range of (1.01 to 1.04): 1.
[0013] In an embodiment of the present disclosure, the width of the bottom surface of the
limit groove is 3 to 8 mm greater than the width of the hoisting composite belt.
[0014] In an embodiment of the present disclosure, the driving device is a synchronous motor
or an asynchronous motor, and the synchronous motor or the asynchronous motor is directly
connected to the friction drum or connected to the friction drum via a coupler or
a reducer.
[0015] In an embodiment of the present disclosure, the braking mechanism comprises a brake,
a brake disc, a hydraulic station and a control device, wherein the brake disc is
disposed at one end or both ends of the friction drum, and the brake is provided at
the brake disc.
[0016] In an embodiment of the present disclosure, the friction drum has a diameter of 2.25
to 6.5 m and/or a width of 2 to 6.8 m.
[0017] In an embodiment of the present disclosure, each hoisting composite belt further
comprises at least one positioning steel wire perpendicular to the plurality of steel
or fiber ropes and fixedly connected with each of the plurality of steel or fiber
ropes.
[0018] In an embodiment of the present disclosure, the plurality of steel or fiber ropes
are aligned in a layer in parallel to a surface of the hoisting composite belt, and
the hoisting composite belt comprises 1 to 3 layers, preferably 2 layers, of the steel
or fiber ropes.
[0019] In an embodiment of the present disclosure, a distance between two adjacent steel
or fiber ropes in each layer is independently in a range of 3 to 10 mm, and/or a distance
between two adjacent layers of the steel or fiber ropes is independently in a range
of 3 to 10 mm.
[0020] In an embodiment of the present disclosure, the hoisting composite belt has the steel
or fiber rope with a diameter of 3 to 30 mm, and/or a thickness of 10 to 80 mm.
[0021] In an embodiment of the present disclosure, the at least one positioning steel wire
is fixed to each steel or fiber rope in a winding manner and/or by a rope clamping.
[0022] In an embodiment of the present disclosure, the fiber rope comprises at least one
selected from carbon fiber, polyethylene fiber, aramid fiber, nylon fiber, polyester
fiber and polypropylene fiber.
[0023] In an embodiment of the present disclosure, the polymer composite layer comprises
at least one selected from polyurethane, a rubber and a resin.
[0024] Additional aspects and advantages of embodiments of present disclosure will be given
in part in the following descriptions, become apparent in part from the following
descriptions, or be learned from the practice of the embodiments of the present disclosure.
BRIEF DESCRIPTION OF THE DRAWINGS
[0025] These and other aspects and advantages of embodiments of the present disclosure will
become apparent and more readily appreciated from the following descriptions made
with reference to the drawings, in which:
Fig. 1 is a schematic diagram of a Koepe hoist according to an embodiment of the present
disclosure;
Fig. 2 is a schematic diagram of a hoisting composite belt according to an embodiment
of the present disclosure;
Fig. 3 is a schematic diagram of a cross-section of two adjacent limit grooves according
to an embodiment of the present disclosure;
Fig. 4 is a schematic diagram of a cross-section of a hoisting composite belt according
to an embodiment of the present disclosure;
Fig. 5 is a schematic diagram of a cross-section of a hoisting composite belt according
to another embodiment of the present disclosure; and
Fig. 6 is a schematic diagram of a cross-section of a hoisting composite belt according
to a further embodiment of the present disclosure.
DETAILED DESCRIPTION
[0026] Embodiments of the present disclosure are described in detail below, examples of
which are illustrated in the drawings. The same or similar elements are denoted by
same reference numerals in different drawings unless indicated otherwise. The embodiments
described herein with reference to drawings are explanatory, and used to generally
understand the present disclosure. The embodiments shall not be construed to limit
the present disclosure.
[0027] The present disclosure provides in embodiments a Koepe hoist. Koepe hoist provided
in the embodiments of the present disclosure is described below with reference to
the drawings.
[0028] Fig. 1 is a schematic diagram of a Koepe hoist according to an embodiment of the
present disclosure. As shown in Fig. 1, the Koepe hoist includes a friction drum 100,
a main shaft device 200, a driving device 300, a braking mechanism 400 and at least
one hoisting composite belt 500. At least one limit groove 110 is formed in a circumferential
direction of the friction drum 100, a corner formed by a side surface 111 and a bottom
surface 112 of the limit groove 110 has an angle of 110° to 150°, preferably in a
range of 110° to 140°, and is rounded off. The main shaft device 200 passes through
the friction drum and being fixed with the friction drum 100. The driving device 300
is connected to the friction drum 100 to drive the friction drum 100 to rotate. The
braking mechanism 400 is connected to the friction drum 100 to drive the friction
drum 100 to decelerate or stop rotating.
[0029] Fig. 2 is a schematic diagram of a hoisting composite belt according to an embodiment
of the present disclosure. As shown in Fig. 2, the hoisting composite belt 500 includes
a polymer composite layer 510 and a plurality of steel or fiber ropes 520. The plurality
of steel or fiber ropes 520 is embedded in the polymer composite layer 510. In an
embodiment of the present disclosure, the hoisting composite belt 500 may further
include at least one positioning steel wire 530 perpendicular to the plurality of
steel or fiber ropes 520 and fixedly connected with each of the plurality of steel
or fiber ropes 520.
[0030] In the Koepe hoist according to the above embodiments of the present disclosure,
on the one hand, by replacing the existing steel head rope with the hoisting composite
belt 500, the steel or fiber ropes 520 inside the hoisting composite belt 500 can
be prevented from contacting the external environment, and thus the corrosion caused
by the external environment such as moisture, water or corrosive mist can be avoided,
and a slip phenomenon can be also avoided since the friction coefficient of the hoisting
composite belt 500 and the friction drum 100 is improved by the polymer composite
layer 510 as the outer layer of the hoisting composite belt 500. By using the at least
one positioning steel wire 530 to horizontally fix each steel or fiber rope 520, the
uniformity distribution of the steel or fiber ropes 520 in the hoisting composite
belt 500 can be realized, such that each head rope 520 may provide a full function
under a normal payload during working, thus improving the uniformity of the stress
distribution of the hoisting composite belt 500 to avoid stress concentration, and
significantly improving firmness and stability of the hoisting composite belt 500.
Therefore, the hoisting composite belt 500 of the present disclosure is safe and reliable,
and it may also improve the hoisting efficiency and extend the service life of the
steel or fiber rope 520. Compared with the steel head rope used in the related art,
under same hoisting distance and payload, the hoisting composite belt 500 of the present
disclosure can further reduce the diameter of the steel or fiber rope 520 and the
diameter of the friction drum 100 matched with the hoisting composite belt 500, thus
significantly reducing the volume and weight of the friction drum 100 and the equipment
cost. For example, when the hoisting distance is 1950 m and the payload is 10 t, the
diameter of the friction drum 100 required in this case is only 2.8 m.
[0031] On the other hand, in the present disclosure, by providing the limit groove 110 on
the friction drum 100 and defining the angle between the side surface 111 and the
bottom surface 112 of the limit groove 110 in a range of 110° to 150°, preferably
in a range of 110° to 140°, the movement direction of the hoisting composite belt
500 can be adjusted to prevent the hoisting composite belt from being deviated from
the normal position and/or avoid collision and overlap when multiple hoisting composite
belts are used in parallel, the weight of the friction drum 100 may be further reduced,
to allow the Koepe hoist to work safely, stably and efficiently. Moreover, the corner
formed by the side surface 111 and the bottom surface 112 of the limit groove is rounded
off to avoid stress concentration at the place where the edge of the hoisting composite
belt 500 is in contact with the limit groove 110 during the hoisting operation, thus
avoiding damages to the edge of the hoisting composite belt 500. Therefore, the Koepe
hoist of the present disclosure may effectively solve the corrosion problem of the
steel rope in the corrosive environment, and significantly reduce the diameter of
the single steel rope, the diameter of the friction drum, and the volume and weight
of the friction drum, so as to realize the miniaturization of the Koepe hoist. With
such a Koepe hoist, the product cost can be reduced, and the payload capacity and
the hoisting efficiency of the Koepe hoist can be improved, to allow the Koepe hoist
to work safely, stably and efficiently.
[0032] In an embodiment of the present disclosure, there may be a plurality of the limit
grooves 110. For example, in Fig. 1, there are four limit grooves 110 and the hoisting
composite belts 500 applied therein are arranged in parallel. Compared with a single
hoisting composite belt, under the same hoisting distance and payload, the plurality
of hoisting composite belts 500 arranged in parallel may further reduce the overall
width and weight of the hoisting composite belt matched to the limit groove, which
benefits installation and use of the hoisting composite belt 500. Specifically, there
may be 1 to 8 limit grooves 110, such as 1, 2, 3, 4, 5, 6, 7 and 8, preferably, the
number of the limit grooves 110 is an even number. It has been found that when the
number of the limiting grooves 110 is large, the number of the hoisting composite
belts 500 used therein is also relatively large. Although the installation is not
complex, it is still required to repeat the installation for several times, so that
it is difficult to ensure the balance between the hoisting composite belts 500. In
the present disclosure, the number of the limit grooves 110 is limited in a range
of 1 to 8, to allow the Koepe hoist to work safely, stably and efficiently.
[0033] In an embodiment of the present disclosure, when there is one limit groove formed
at a surface of the friction drum, the bottom surface of the limit groove has a width
W ranging from 803 to 3008 mm. When there is a plurality of limit grooves formed at
the surface of the friction drum, the bottom surface of the limit groove has a width
W ranging from 103 to 808 mm, as shown in Fig. 3. It has been found that for a certain
width of the friction drum, if the bottom surface 112 of the limit groove 110 is wide,
the width of the hoisting composite belt 500 used to match the limit groove 110 is
also wide, resulting in a large weight of the hoisting composite belt 500, thus negatively
affecting the installation of the hoisting composite belt 500 and making it difficult
to keep the hoisting composite belts 500 in balance during working, and if the bottom
surface 112 of the limit groove 110 is narrow, the width of the hoisting composite
belt 500 used to match the hoisting composite belt is also narrow, resulting in a
large number of the hoisting composite belts 500 in parallel to achieve the desired
hoisting distance and payload, thus negatively affecting the installation of the hoisting
composite belt 500 and the operation efficiency for fixing the hoisting composite
belts 500 to the hoisting conveyance, and making it difficult to keep the hoisting
composite belts 500 in balance during working. In the present disclosure, by controlling
the width of the bottom surface 112 of the limit groove 110 in the above range, the
Koepe hoist can work safely, stably and efficiently. Preferably, the width W of the
bottom surface 112 of the limit groove 110 can be in a range of 803 to 1008 mm (when
one limit groove is applied) or in a range of 203 to 458 mm (when the plurality of
the limit grooves is applied), to allow the Koepe hoist to work more safely, stably
and efficiently. Further, a distance L between centerlines of two adjacent limit grooves
110 is not less than 250 mm. Therefore, when the friction drum 100 has a fixed width,
the number of the limit grooves 110 and the width of the hoisting composite belt 500
corresponding to the limit groove 110 may be controlled to allow the Koepe hoist to
work safely, stably and efficiently.
[0034] In an embodiment of the present disclosure, as shown in Fig. 3, a ratio of a depth
H of the limit groove 110 to a thickness of the hoisting composite belt 500 may be
in a range of (0.5 to 1.1) : 1. In an embodiment of the present disclosure, a ratio
of the width W of the bottom surface 112 of the limit groove 110 to a width of the
hoisting composite belt 500 may be in a range of (1.01 to 1.06): 1. In the present
disclosure, by controlling the above ratios, the movement direction of the hoisting
composite belt 500 may be effectively adjusted, so that the hoisting composite belt
500 may be moved in the limit groove without deviation from its normal position and/or
collision and overlap due to the application of the plurality of the hoisting composite
belts 500, and the weight of the friction drum 100 may be further reduced, thus realizing
a safe, stable and efficient operation of the Koepe hoist. Preferably, the ratio of
the depth H of the limit groove 110 to the thickness of the hoisting composite belt
500 may be in a range of (0.6 to 1.1) : 1, thus reducing the diameter of the friction
drum 100 to further reduce the volume and the weight of the friction drum 100. Preferably,
the ratio of the width W of the bottom surface 112 of the limit groove 110 to the
width of the hoisting composite belt 500 may be in a range of (1.01 to 1.04): 1, thus
adjusting the movement direction of the hoisting composite belt 500 to prevent the
hoisting composite belt 500 from being deviated from its normal position and to avoid
collision and overlap when the plurality of the hoisting composite belts 500 are arranged
in parallel.
[0035] In an embodiment of the present disclosure, the width of the bottom surface 112 of
the limit groove 110 is 3 to 8 mm greater than the width of the hoisting composite
belt 500. Therefore, the hoisting composite belt 500 may be prevented from being deviated
from its normal position and/or collision and overlap can be avoided when multiple
hoisting composite belts are arranged in parallel.
[0036] Fig. 4 is a schematic diagram of a cross-section of a hoisting composite belt according
to an embodiment of the present disclosure. As shown in Fig. 4, in an embodiment of
the present disclosure, the hoisting composite belt 500 may have a trapezoid cross-section.
A bottom angle θ of the trapezoid cross-section may be in a range of 30 to 70°.
[0037] In an embodiment of the present disclosure, when there is one hoisting composite
belt 500 used in the Koepe hoist, the hoisting composite belt 500 has a width of 800
to 3000 mm and a thickness of 10 to 80 mm. In this case, the number of the steel or
fiber ropes 520 may be in a range of 30 to 150, and the diameter of the ropes 520
may be in a range of 3 to 30 mm. When a plurality of hoisting composite belts 500
are used in parallel, the hoisting composite belt 500 has a width of 100 to 800 mm
and a thickness of 10 to 80 mm. In this case, the number of the steel or fiber ropes
520 may be in a range of 8 to 30, and the diameter of the ropes 520 may be in a range
of 3 to 30 mm. It has been found that as the hoisting distance and the hoisting payload
increase, the diameter of the rope 520 and the diameter of the corresponding friction
drum 100 also increase accordingly, resulting in a reduced efficiency for the Koepe
hoist. At same hoisting distance and payload requirements, the hoisting composite
belt is used to replace the steel rope so as to reduce the diameter of the single
steel rope and the diameter of the corresponding friction drum. In the present disclosure,
by applying the hoisting composite belt 500 as described in the above embodiments,
the steel or fiber rope 520 may be prevented from contacting with the external environment
to improve the protection for the steel or fiber rope, the payload capacity and mechanical
properties of the hoisting composite belt may be improved to reduce the number of
steel or fiber ropes required and reduce the diameter of the rope and the diameter
of the corresponding friction drum, thus further reducing the equipment cost and improving
the hoisting efficiency of the Koepe hoist. Preferably, when there is one hoisting
composite belt 500 used in the Koepe hoist, the hoisting composite belt 500 has a
width of 800 to 1000 mm, in this case, the number of the steel or fiber ropes 520
may be in a range of 30 to 50, so as to ensure that the hoisting composite belt 500
has sufficient payload capacity and mechanical properties for transportation and installation.
In an embodiment of the present disclosure, a width of the hoisting composite belt
500 may be in a range of 850 to 3100 mm, and the payload may be in a range of 10 to
65 t. It should be noted that in the present disclosure, when the Koepe hoist composite
belt has a trapezoid cross-section, both the short base and the long base of the trapezoid
cross-section meet the range of 800 to 3000 mm. Moreover, the thickness of the hoisting
composite belt 500 refers to a vertical distance between the two bases.
[0038] In an embodiment of the present disclosure, when the hoisting composite belt 500
is located in the limit groove 110, the width of the limit groove 100 is 3 to 8 mm
greater than the width of the hoisting composite belt 500 in a same level, thus adjusting
the movement direction of the hoisting composite belt 500. Specifically, a short base
of the trapezoid cross-section of the hoisting composite belt 500 is close to the
bottom surface 112 of the limit groove 110, and a long base of the trapezoid cross-section
of the hoisting composite belt 500 is away from the bottom surface 112 of the limit
groove 110, such that the movement direction of the hoisting composite belt 500 may
be adjusted by the limit groove 110 of the friction drum 100 to prevent the hoisting
composite belt 500 from being deviated from its normal position and/or avoid collision
and overlap when multiple hoisting composite belts 500 are used in parallel, thus
allowing the Koepe hoist to work safely, stably and efficiently.
[0039] Fig. 5 is a schematic diagram of a cross-section of a hoisting composite belt according
to another embodiment of the present disclosure. As shown in Fig. 5, in an embodiment
of the present disclosure, the plurality of steel or fiber ropes 520 are aligned in
a layer in parallel to a surface of the hoisting composite belt 500, and the hoisting
composite belt may include 1 to 3 layers of the steel or fiber ropes 520. Specifically,
one layer of the steel or fiber ropes 520 is in parallel with another layer of the
steel or fiber ropes 520. Moreover, the steel or fiber ropes 520 in a layer may also
be in parallel with each other in a longitudinal direction of the hoisting composite
belt 500. For example, when the hoisting composite belt 500 includes 2 to 3 layers
of steel or fiber ropes 520, the flexibility of the hoisting composite belt 500 may
be improved. Moreover, the payload capacity of the hoisting composite belt 500 can
be improved and the diameter of a single steel or fiber rope in the hoisting composite
belt 500 may be reduced. In an embodiment of the present disclosure, the hoisting
composite belt 500 may include two layers of steel or fiber ropes 520, thus further
improving the flexibility of the hoisting composite belt 500.
[0040] As shown in Fig. 5, in an embodiment of the present disclosure, the hoisting composite
belt 500 includes three layers of steel ropes 520, and the diameter of the steel ropes
in the middle layer is greater than the diameter of the steel ropes in the other two
layers. Alternatively, the hoisting composite belt 500 includes three layers of fiber
ropes 520, and the diameter of the fiber ropes in the middle layer is greater than
the diameter of the fiber ropes in the other two layers. Preferably, the diameter
of the steel ropes in the middle layer may be 5 to 20 mmm, for example, 5 mm, 8 mm,
11 mm, 13 mm, 16 mm and 20 mm, greater than the diameter of the steel ropes of the
other two adjacent layers. Alternatively, the diameter of the fiber ropes in the middle
layer may be 5 to 20 mmm, for example, 5 mm, 8 mm, 11 mm, 13 mm, 16 mm and 20 mm,
greater than the diameter of the steel ropes of the other two adjacent layers. Therefore,
a problem of a relative large stress for the ropes in the middle layer of the hoisting
composite belt may be solved. Moreover, the intensity and the payload capacity of
the hoisting composite belt may be improved without increasing the size of the cross-section
of the hoisting composite belt.
[0041] In an embodiment of the present disclosure, as shown in Fig. 5, a distance l
1 between two adjacent steel or fiber ropes 520 in each layer is independently in a
range of 3 to 10 mm, and/or a distance l
2 between two adjacent layers of the steel or fiber ropes 520 is independently in a
range of 3 to 10 mm. In this way, the distribution density of steel or fiber ropes
520 may be adjusted to improve the cohesion of the hoisting composite belt 500, thus
improving the payload capacity of the hoisting composite belt 500. Preferably, the
distance l
1 between two adjacent ropes 520 in one layer is the same, and the distance l
2 between two adjacent layers is the same, such that the hoisting composite belt 500
may be stressed uniformly. It should be noted that in each layer or two adjacent layers,
the distance between two adjacent ropes 520 refers to a shortest distance between
tangents of two adjacent ropes 520.
[0042] In an embodiment of the present disclosure, the hoisting composite belt 500 may have
the steel or fiber rope 520 with a diameter of 3 to 30 mm. Further, the hoisting composite
belt 500 may have a thickness d of 10 to 80 mm. With the hoisting composite belt of
the present disclosure, the diameter of the head rope may be reduced and the payload
capacity of the hoisting composite belt 500 may be improved when the hoisting composite
belt still has a good flexibility.
[0043] In an embodiment of the present disclosure, as shown in Figs. 4 and 6, the positioning
steel wire 530 is fixed to each steel or fiber rope in a winding manner and/or by
a rope clamping 531, so as to improve the distribution uniformity of the steel or
fiber ropes 520 in the hoisting composite belt 500 and improve the cohesion of the
hoisting composite belt, to allow each head rope 520 to provide a full function under
a normal payload during working and to avoid the stress concentration, thus significantly
improving firmness and stability of the hoisting composite belt 500 and improving
the payload capacity of the hoisting composite belt 500.
[0044] Further, the diameter of the positioning steel wire 530 may be in a range of 2 to
5 mm, and an interval distance between two adjacent positioning steel wires 530 may
be in a range of 50 to 100 m, which not only has a small impact on the overall thickness
and width of the hoisting composite belt 500, but also can be beneficial to the distribution
of the steel or fiber ropes 520 in the hoisting composite belt 500, thus contributing
to improvements in the firmness, the stability, the payload capacity and the service
life of the hoisting composite belt. It should be noted that the winding manner and
the type of the rope clamping in the present disclosure are not particularly limited,
and can be selected according to the practices. For example, the winding manner may
be winding, knotting or winding with the rope clamping. The rope clamping may be in
detachable or non-removable type, single-hole or double-hole type, U-bolt type or
double saddle type.
[0045] In an embodiment of the present disclosure, the number of the hoisting composite
belts 500 in the present disclosure may adjusted according to the hoisting conditions
such as the hoisting distance, the weight of the hoisting conveyance, the diameter
of the friction drum, the payload demand, the number and diameter of the head ropes
520 in the hoisting composite belt 500.
[0046] In an embodiment of the present disclosure, the fiber rope may include high-performance
fibers. The type of the fiber rope 520 in the present disclosure is not particularly
limited, and may be selected according to the practices. For example, the fiber rope
520, preferably the high-performance fiber rope, includes at least one selected from
carbon fiber, polyethylene fiber, aramid fiber, nylon fiber, polyester fiber and polypropylene
fiber. Thereby, the hoisting composite belt 500 may have a high tensile strength and
a low weight.
[0047] In an embodiment of the present disclosure, the polymer composite layer 510 may include
a high-performance fiber mesh, which can not only further improve the payload capacity
of the hoisting composite belt 500, but also prevent the outer composite 510 from
falling off due to local aging or collision.
[0048] In an embodiment of the present disclosure, the polymer composite layer 510 may include
an organic reinforcement material. Further, the polymer composite layer 510 may include
at least one selected from polyurethane, a rubber and a resin. It has been found that
with the above polymer materials, the toughness and friction coefficient of the hoisting
composite belt can be improved, which can further improve the hoisting efficiency
of the Koepe hoist and increase the service life of the hoisting composite belt.
[0049] In an embodiment of the present disclosure, the type of the driving device 300 is
not particularly limited, and may be selected according to the practices. For example,
the driving device 300 may be a synchronous motor or an asynchronous motor, and the
asynchronous motor or the asynchronous motor may be directly connected to the friction
drum 100 or connected to the friction drum 100 via a coupler or a reducer, thus effectively
driving the friction drum 100 to rotate, and providing driving force by the friction
between the friction drum 100 and the hoisting composite belt 500.
[0050] In an embodiment of the present disclosure, the type of the braking mechanism 400
is not particularly limited, and may be selected according to the practices. For example,
the braking mechanism 400 may include a brake, a brake disc, a hydraulic station and
a control device. The brake disc is disposed at one end or both ends of the friction
drum 100, and the brake is provided at the brake disc. Alternatively, the brake may
be multiple sets of disc brakes, thus effectively driving the friction drum 100 to
decelerate or stop rotating.
[0051] In an embodiment of the present disclosure, the diameter and the width of the friction
drum 100 are not particularly limited, and may be selected according to the operating
conditions, such as hoisting distance, hoisting conveyance weight, payload requirement,
and properties of the hoisting composite belt 500. The friction drum may have a diameter
of 2.25 to 6.5 m. Further, the friction drum may have a width of 2 to 6.8 m. In this
case, the hoisting distance may reach 800 to 3000 m, and the payload may be in a range
of 10 to 65 t.
[0052] The present disclosure will be described below with reference to specific examples.
It should be noted that these examples are illustrative and shall not be construed
to limit the present disclosure.
Inventive Example 1
[0053] A Koepe hoist with 6 limit grooves and 6 hoisting composite belts is used under conditions
of a hoisting distance of 1950 m, a weight of a hoisting conveyance of 30 t and a
normal payload of 10 t. A corner formed by a side surface and a bottom surface of
the limit groove has an angle of 110° and is rounded off. The limit groove has a width
of the bottom surface of 233 mm and a depth of 28 mm, and the cross-section of the
hoisting composite belt has a width of 230 mm and a thickness of 28 mm. A diameter
of one steel rope in the hoisting composite belt is 20 mm. The friction drum of the
Koepe hoist has a diameter of 2.8 m and a width is 3.0 m. When the Koepe hoist is
operated during the hoisting process, the hoisting composite belt is not deviated
from its normal position.
Inventive Example 2
[0054] A Koepe hoist with 6 limit grooves and 6 hoisting composite belts is used under conditions
of a hoisting distance of 1950 m, a weight of a hoisting conveyance of 30 t and a
normal payload of 10 t. A corner formed by a side surface and a bottom surface of
the limit groove has an angle of 110° and is rounded off. The limit groove has a width
of the bottom surface of 203 mm and a depth of 24 mm, and the cross-section of the
hoisting composite belt has a width of 200 mm and a thickness of 24 mm. A diameter
of one high performance fiber rope in the hoisting composite belt is 16 mm. The friction
drum of the Koepe hoist has a diameter of 2.25 m and a width is 2.8 m. When the Koepe
hoist is operated during the hoisting process, the hoisting composite belt is not
deviated from its normal position.
Comparable Example 1
[0055] A Koepe hoist with 6 steel ropes is used under conditions of a hoisting distance
of 1950 m, a weight of a hoisting conveyance of 30 t and a normal payload of 10 t.
It is required that a diameter of one steel rope is 58 mm, a diameter of a friction
drum of the Koepe hoist is 6.0 m and a width of the friction drum is 3.0 m.
[0056] As shown in the inventive examples, by replacing the steel rope with the hoisting
composite belt and providing the limit groove on the friction drum, each of the hoisting
composite belts used may be slightly moved in the limit groove of the Koepe hoist
without large deviation. Moreover, compared with the comparative example, under the
same hoisting conditions, the required diameter of the head rope, the required diameter
of the friction drum are significantly reduced, and thus the weight and volume of
the Koepe hoist can be reduced, which may benefit the installation of the Koepe hoist
and improve the hoisting efficiency.
[0057] In the specification, it is to be understood that terms such as "central", "longitudinal",
"lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left",
"right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise",
"counterclockwise", "axial", "radial" and "circumferential" should be construed to
refer to the orientation as then described or as shown in the drawings under discussion.
These relative terms are for convenience of description and do not require that the
present disclosure be constructed or operated in a particular orientation, and thus
shall not be construed to limit the present disclosure.
[0058] In the present disclosure, unless specified or limited otherwise, the terms "mounted",
"connected", "coupled", "fixed" and the like are used broadly, and may be, for example,
fixed connections, detachable connections, or integral connections; may also be mechanical
or electrical connections; may also be direct connections or indirect connections
via intervening structures; may also be inner communications of two elements, which
can be understood by those skilled in the art according to specific situations.
[0059] In the description, unless specified or limited otherwise, a structure in which a
first feature is "on" or "below" a second feature may include an embodiment in which
the first feature is in direct contact with the second feature, and may also include
an embodiment in which the first feature and the second feature are not in direct
contact with each other, but are contacted via an additional feature formed therebetween.
Furthermore, a first feature "on", "above" or "on top of' a second feature may include
an embodiment in which the first feature is right or obliquely "on", "above" or "on
top of' the second feature, or just means that the first feature is at a height higher
than that of the second feature; while a first feature "below", "under" or "on bottom
of' a second feature may include an embodiment in which the first feature is right
or obliquely "below", "under" or "on bottom of' the second feature, or just means
that the first feature is at a height lower than that of the second feature.
[0060] Reference throughout this specification to "an embodiment", "some embodiments", "an
example", "a specific example", or "some examples" means that a particular feature,
structure, material, or characteristic described in connection with the embodiment
or example is included in at least one embodiment or example of the present disclosure.
Thus, the appearances of above phrases in various places throughout this specification
are not necessarily referring to the same embodiment or example of the present disclosure.
Furthermore, the particular features, structures, materials, or characteristics may
be combined in any suitable manner in one or more embodiments or examples. In addition,
different embodiments or examples described in the specification, as well as features
of embodiments or examples, without conflicting, may be combined by one skilled in
the art.
[0061] Although explanatory embodiments have been shown and described, it would be appreciated
by those skilled in the art that the above embodiments cannot be construed to limit
the present disclosure, and changes, alternatives, and modifications can be made in
the embodiments without departing from scope of the present disclosure.
1. A Koepe hoist, comprising:
a friction drum (100), wherein at least one limit groove (110) is formed in a circumferential
direction of the friction drum (100), a corner formed by a side surface (111) and
a bottom surface (112) of the limit groove (110) has an angle of 110° to 150° and
is rounded off;
a main shaft device (200) passing through the friction drum (100) and being fixed
with the friction drum (100);
a driving device (300) connected to the friction drum (100) to drive the friction
drum (100) to rotate;
a braking mechanism (400) connected to the friction drum (100) to drive the friction
drum (100) to decelerate or stop rotating; and
at least one hoisting composite belt (500), wherein each hoisting composite belt (500)
comprises:
a polymer composite layer (510), and
a plurality of steel or fiber ropes (520) embedded in the polymer composite layer
(510).
2. The Koepe hoist according to claim 1, wherein
when one limit groove (110) is formed at a surface of the friction drum (100), the
bottom surface of the limit groove (110) has a width ranging from 803 to 3008 mm,
preferably from 803 to 1008 mm; or
when a plurality of limit grooves (110) are formed at the surface of the friction
drum (100), the bottom surface of the limit groove (110) has a width ranging from
103 to 808 mm, preferably from 203 to 458 mm.
3. The Koepe hoist according to claim 1 or 2, wherein a distance between centerlines
of two adjacent limit grooves (110) is not less than 250 mm.
4. The Koepe hoist according to any one of claims 1 to 3, wherein the Koepe hoist has
a ratio of a depth of the limit groove (110) to a thickness of the hoisting composite
belt (500) in a range of (0.5 to 1.1): 1, preferably in a range of (0.6 to 1) : 1,
and/or
a ratio of the width of the bottom surface to a width of the hoisting composite belt
(500) in a range of (1.01 to 1.06): 1, preferably in a range of (1.01 to 1.04): 1.
5. The Koepe hoist according to claim 4, wherein the width of the bottom surface of the
limit groove (110) is 3 to 8 mm greater than the width of the hoisting composite belt
(500).
6. The Koepe hoist according to any one of claims 1 to 5, wherein the driving device
(300) is a synchronous motor or an asynchronous motor, and the synchronous motor or
the asynchronous motor is directly connected to the friction drum (100) or connected
to the friction drum (100) via a coupler or a reducer.
7. The Koepe hoist according to any one of claims 1 to 6, wherein the braking mechanism
(400) comprises a brake, a brake disc, a hydraulic station and a control device, wherein
the brake disc is disposed at one end or both ends of the friction drum (100), and
the brake is provided at the brake disc.
8. The Koepe hoist according to any one of claims 1 to 7, wherein the friction drum (100)
has a diameter of 2.25 to 6.5 m and/or a width of 2 to 6.8 m.
9. The Koepe hoist according to any one of claims 1 to 8, wherein each hoisting composite
belt (500) further comprises at least one positioning steel wire (530) perpendicular
to the plurality of steel or fiber ropes (520) and fixedly connected with each of
the plurality of steel or fiber ropes (520).
10. The Koepe hoist according to any one of claims 1 to 9, wherein the plurality of steel
or fiber ropes (520) are aligned in a layer in parallel to a surface of the hoisting
composite belt (500), and the hoisting composite belt (500) comprises 1 to 3 layers,
preferably 2 layers, of the steel or fiber ropes (520).
11. The Koepe hoist according to any one of claims 1 to 10, wherein a distance between
two adjacent steel or fiber ropes (520) in each layer is independently in a range
of 3 to 10 mm, and/or a distance between two adjacent layers of the steel or fiber
ropes (520) is independently in a range of 3 to 10 mm.
12. The Koepe hoist according to any one of claims 1 to 11, wherein the hoisting composite
belt (500) has
the steel or fiber rope with a diameter of 3 to 30 mm, and/or
a thickness of 10 to 80 mm.
13. The Koepe hoist according to claim 9, wherein the at least one positioning steel wire
(530) is fixed to each steel or fiber rope in a winding manner and/or by a rope clamping
(531).
14. The Koepe hoist according to any one of claims 1 to 13, wherein the fiber rope comprises
at least one selected from carbon fiber, polyethylene fiber, aramid fiber, nylon fiber,
polyester fiber and polypropylene fiber.
15. The Koepe hoist according to any one of claims 1 to 14, wherein the polymer composite
layer (510) comprises at least one selected from polyurethane, a rubber and a resin.