BACKGROUND OF THE INVENTION
1. Field of the Invention
[0001] The present invention relates to a depressurization apparatus according to the preamble
of claim 1, for depressurizing the inside of a hydraulic pipe provided in a working
machine such as a crusher and a demolition machine, and a hydraulic pipe structure
provided with the depressurization apparatus.
2. Description of Related Art
[0002] For example, a boom forming a long attachment of a demolition machine is configured
so as to be dismantled into a plurality of short unit booms in consideration to dismantlement
and transportation properties of a machine or the like. A hydraulic pipe provided
in the boom is also divided into unit pipes for every unit boom and the unit pipes
are connected to and/or removed from each other by joints provided in ends of the
unit pipes.
[0003] It should be noted that, as the joints, closed type couplers to be attached and detached
through one touch operation with little oil leakage at the time of attaching and detaching
(also called quick couplers, self seal couplings or the like; hereinafter, simply
referred to as the couplers) are generally used. The couplers are connected to the
other joints as male and female and opened by a connecting operation force.
[0004] However, when closed type joints represented by the couplers are used, there is sometimes
a case where the pipe is separated into the unit pipes while holding internal pressure.
[0005] As a result of leaving, for example, the unit pipes in the field in a state that
the pipe is separated, there is sometimes a case where a temperature of oil sealed
into the pipes is increased and the oil is expanded by an increase in an air temperature
so that the pressure on the inside of the pipes is increased.
[0006] Further, in a state that there is no pressure, when the unit pipes are connected
to each other, there is sometimes a case where filled oil prevents a valve opening
operation of the joints.
[0007] Therefore, a pipe connection work at the time of assembling the machine is troublesome
or impossible.
[0008] As a countermeasure thereof,
JP- No. 2001-208221 (hereinafter, referred to as Patent Document 1) proposes a technique that a depressurization
valve is provided at an end of a pipe (including a case where the depressurization
valve is provided at a joint), and residual pressure is removed by operating a push
button of the depressurization valve.
[0009] JP- No. 3294550 (hereinafter, referred to as Patent Document 2) discloses a technique that pipes
are joined into a joined pipe line through a check valve and the joined pipe line
is opened by an operation of one stop valve so that oil in the pipes are all removed.
[0010] However, when the depressurization valve is provided for every pipe and the pressure
(oil) is removed for every depressurization valve as in the technique of Patent Document
1, a work efficiency of depressurization is bad.
[0011] It should be noted that in order to deal with the above problem, the applicant proposed
a technique that one depressurization tube connected to a tank and depressurization
is performed by consecutively connecting depressurization valves and the depressurization
tube by hoses in
JP- No. 2006-233571. However in the above technique, since the hoses have to be connected to every pipe,
an efficiency of a depressurization work is still bad.
[0012] Meanwhile, according to Patent Document 2, high pressure is always concentrated on
one stop valve. Thus, when the stop valve is damaged, it is dangerous since situations
that high pressure oil within all the pipes runs out at once so that all the hydraulic
actuators become inoperative or operate on the dangerous side due to the removal of
the oil are generated.
SUMMARY OF THE INVENTION
[0014] It is the object of the present invention to provide a depressurization apparatus
for a hydraulic pipe and a hydraulic pipe structure that are capable of removing oil
in a plurality of pipes without risks as in Patent Document 2.
[0015] A depressurization apparatus for a hydraulic pipe according to the present invention
comprises the features of claim 1.
[0016] According to the depressurization apparatus of the present invention, since the depressurization
block is provided with the plurality of main passages to which the plurality of hydraulic
pipes are connected, the depressurization valves for removing the oil from the main
passages by a manual opening operation from the exterior, and the drain passage for
joining and guiding the oil removed from the depressurization valves to the exterior,
the oil in the plurality of pipes can be all removed. Therefore, it is possible to
highly improve a work efficiency of depressurization in comparison to the case where
a depressurization work is performed for every pipe including the technique of Patent
Document 1.
[0017] Further, since each of the pipes is individually opened and closed by the depressurization
valve, there are no risks such as removal of oil from all the pipes due to damage
of one valve as in the technique of Patent Document 2.
[0018] In the present invention, it is preferable that in the above configuration, each
of the depressurization valves is provided with an operation element for opening a
drain port by a pressing operation from the exterior, and an operation body having
a plurality of operation portions for performing the pressing operation to all the
operation elements at the same time is provided.
[0019] In this case, since it is possible to perform an opening operation to all the depressurization
valves at the same time by the operation body, the work efficiency is further improved.
[0020] In the present invention, it is preferable that in any of the above configurations,
the operation body is adapted to be held to the depressurization block in an operation
state that the operation portions perform the pressing operation to all the operation
elements.
[0021] In this case, since the operation body is adapted to be held in the operation state,
with a configuration of collecting the removed oil in an oil receiver, one worker
can perform an opening (depressurizing) operation and a collecting operation of the
removed oil.
[0022] In the present invention, it is preferable that the operation portions are provided
on a back surface of the operation body and the operation body is adapted to be held
to the depressurization block in a reversed and non-operation state.
[0023] In this case, since it can be determined whether the depressurization valves are
in an opening state or a closing state in accordance with a front or back surface
of an operation plate, there is little fear that the work is started in the opening
state.
[0024] In the present invention, it is preferable that in the above configuration, the operation
body is attached to the depressurization block through a hinge so as to be rotated
and reversed.
[0025] In this case, since the operation body is rotationally attached to the depressurization
block through the hinge, switching between the operation state and the non-operation
state of the operation body becomes easy.
[0026] In the present invention, it is preferable that in any of the above configurations,
both front and back surfaces of the operation body are painted by different colors
from each other.
[0027] In this case, since both the front and back surfaces of the operation body are painted
by different colors from each other, it is possible to certainly distinguish between
the opening state and the closing state of the depressurization valves in one glance.
[0028] In the present invention, it is preferable that in the above configuration, each
of the depressurization valves is provided with an operation element for opening a
drain port by an operation from the exterior, and an interlock member to be attached
to the depressurization block only in a state that all the operation elements are
located on closed positions is provided.
[0029] In the present invention, it is preferable that in the above configuration, each
of the depressurization valves is provided with a knob rotated and operated between
an open position where the drain port is opened and a closed position where the drain
port is closed, and the interlock member is provided with protrusions not interfering
with the knobs only in a state that the knobs are located on the closed positions
on a back surface of a plate lying over the depressurization valves.
[0030] In this case, since the interlock member to be attached to the depressurization block
only in a state that all the operation elements for opening the drain ports of the
depressurization valves (including rotation type knobs) are located on the closed
positions is provided, it is possible to avoid that the work is started in a state
that the depressurization valves are opened due to an interlock function by the interlock
member.
[0031] In this case, since the interlock function is achieved by the interference between
the protrusions and the knobs serving as the operation elements, it is possible to
obtain a simple and certain effect.
[0032] A hydraulic pipe structure of the present invention is characterized in that the
depressurization block of the depressurization apparatus having any of the above configurations
is provided lying over a plurality of hydraulic pipes, the hydraulic pipes are connected
to the main passages of the depressurization block and an opening operation is performed
to depressurization valves thereby oil on the inside of the hydraulic pipes is all
removed to the exterior through the main passages and a drain passage.
[0033] In this case, since the hydraulic pipe structure of the present invention is configured
on the premise that the depressurization block is provided with the plurality of main
passages to which the plurality of hydraulic pipes are connected, the depressurization
valves for removing the oil from the main passages by a manual opening operation from
the exterior, and the drain passage for joining and guiding the oil removed from the
depressurization valves to the exterior, the oil in the plurality of pipes can be
all removed. Therefore, it is possible to highly improve a work efficiency of depressurization
in comparison to the case where a depressurization work is performed for every pipe
including the technique of Patent Document 1.
BRIEF DESCRIPTION OF THE DRAWINGS
[0034]
Fig. 1 is a perspective view of a depressurization apparatus according to a first
embodiment of the present invention and a boom of a working attachment to which the
depressurization apparatus is attached;
Fig. 2 is a perspective view of the depressurization apparatus;
Fig. 3 is a perspective view of a state that an opening operation is performed to
depressurization valves of the depressurization apparatus;
Fig. 4 is a perspective view of a state that a push plate of the depressurization
apparatus is attached to a depressurization block in a reversed state;
Fig. 5 is a horizontal sectional view of the depressurization apparatus;
Fig. 6 is an enlarged sectional view by line VI-VI of Fig. 5;
Fig. 7 is a view of a valve opening state corresponding to Fig. 6;
Fig. 8 is a perspective view of a depressurization apparatus according to a second
embodiment of the present invention;
Fig. 9 is a perspective view of a depressurization apparatus according to a third
embodiment of the present invention; and
Figs. 10A and 10B are views showing relations between an interlock plate and a knob
of a depressurization valve both in a valve opening state and a valve closing state
of the depressurization apparatus respectively.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0035] Hereinafter, a description will be given to an embodiment for carrying out the present
invention on the basis of the drawings.
First Embodiment (refer to Figs. 1 to 7)
[0036] Fig. 1 shows two unit booms 1 and 2 among a number of unit booms forming a boom of
a long attachment of a demolition machine, and a plurality of (five in the figure)
unit hydraulic pipes 3 and 4 provided in the unit booms. At the time of assembling
the boom, both the unit booms 1 and 2 are connected to each other and the corresponding
unit hydraulic pipes 3 and 4 are connected to each other by joints (male side joints
and female side joints) 5 and 6 thereof.
[0037] It should be noted that the base end side of a hydraulic pipe formed by connecting
all the unit hydraulic pipes is connected to a hydraulic pump and a tank installed
in a base machine (not shown), and the front end side is connected to a plurality
of hydraulic actuators provided in the attachment including the boom.
[0038] In both the unit booms 1 and 2, a depressurization apparatus 7 is provided lying
over the unit hydraulic pipes (hereinafter, simply called as the pipes) 3 and 4.
[0039] A configuration of the depressurization apparatus 7 is shown in Fig. 2 and the following
figures in detail.
[0040] The depressurization apparatus 7 is provided with a rectangular depressurization
block 8.
[0041] The depressurization block 8 is provided with a plurality of main passages 9 to which
the pipes 3 and 4 are individually connected as shown in Figs. 5 to 7, depressurization
valves 10 for removing oil on the inside of the pipes through the main passages 9
by a manual opening operation from the exterior, and one drain passage 11 for joining
and guiding the oil removed from the depressurization valves 10 to the exterior.
[0042] The drain passage 11 is provided so as to pass through in the orthogonal direction
to the main passages 9, that is, the longitudinal direction of the depressurization
block 8. In a state that the one end side of the drain passage 11 is closed, the other
end side is connected to a drain joint 12 (refer to Figs. 2 to 4).
[0043] The drain joint 12 is connected to a drain hose 13, and drained oil is collected
in an oil receiver 14. Alternatively, the drain joint 12 is connected to a drain tube
15, and the drained oil can be returned to the tank through the drain tube 15.
[0044] A configuration of the depressurization valve 10 is shown in the above Patent Document
1 in detail.
[0045] That is, the depressurization valve 10 comprises, as shown in Figs. 6 and 7, a valve
body 16 arranged in a center part, an operation element 17 covered and fitted from
the upper side to the valve body 16 in a state that the operation element 17 can slide
in the up and down direction, a cylindrical valve case 18 having a bottom and surrounding
the valve body 16 and the operation element 17 from the outer periphery side, and
a coil spring 19 for always biasing the operation element 17 upward. The valve case
18 is screwed into a valve attachment hole 20 of the depressurization block 8 and
attached to the depressurization block 8.
[0046] In a bottom surface of the valve attachment hole 20, is provided a communication
hole 21 communicating to the main passage 9. The communication hole 21 is formed so
as to communicate to the drain passage 11 of the depressurization block 8 through
a vertical hole 22 provided in a central part of the valve body 16, a horizontal hole
23 provided in an upper part of the vertical hole 22, a peripheral groove 24 provided
in an inner periphery of the operation element 17, a clearance 25 formed between contact
surfaces of the valve body 16 and the operation element 17 in a state that the clearance
communicates to the peripheral groove, an oil chamber 26 formed between the valve
body 16 and the valve case 18, and a drain port 27 provided in a hook shape in the
valve case 18 communicating to the oil chamber 26.
[0047] The clearance 25 is closed by a seal 28 as shown in Fig. 6 in a state that the operation
element 17 is raised (valve opening state). When the operation element 17 is pushed
from the upper side and lowered, the clearance 25 is drawn apart from the seal 28
and opened. That is, the depressurization valve 10 is in the valve opening state.
[0048] Therefore, after connecting both the booms 1 and 2, by a pressing operation of the
operation elements 17 of the depressurization valves 10 at the time of connecting
the pipes 3 and 4 to each other, internal pressure or filled oil of the pipes 3 and
4 can be removed from the drain ports 27 of the depressurization valves 10 to the
drain passage 11 and all discharged.
[0049] Meanwhile, as an operation body for performing the manual opening operation to the
operation elements 17 from the exterior, a push plate 29 shown in Figs. 2 to 4, 6
and 7 is used.
[0050] On a back surface of the push plate 29, are aligned protrusions 30 serving as operation
portions for performing the pressing operation individually to the operation elements
17 of the depressurization valves 10 at the same interval as an interval between the
operation elements 17. By covering the depressurization block 8 with the push plate
29 from the upper side as shown in Figs. 3 and 7, the protrusions 30 performs the
pressing operation to all the operation elements 17 of the depressurization valves
10 at the same time.
[0051] Meanwhile, the depressurization block 8 is covered with a cover 31 for protecting
the depressurization valves 10 and improving external appearance as shown in Figs.
1 to 4. The push plate 29 is held to an upper surface of the cover 31 by screws 32
in the operation state mentioned above as shown in Fig. 3. By this, the depressurization
valves 10 are held in the valve opening state (operation state).
[0052] The push plate 29 is, except for the time of depressurizing, screwed to the cover
31 in a reversed state that the protrusions 30 are exposed on the front side as shown
in Fig. 4. When the push plate 29 is reversed, it can be determined from the exterior
that the depressurization valves 10 are in the valve opening state.
[0053] That is, it is possible to prevent a trouble that the work is started by mistake
in a state that the depressurization valves 10 are opened so that the oil runs out.
[0054] In order to make easier distinguishing between a front and back surfaces of the push
plate 29 (the operation state and the non-operation state), both the front and back
surfaces of the push plate 29 are painted by different colors from each other. In
order to show the different colors between the front and back surfaces, in Fig. 4,
diagonal lines are given to the push plate 29 in the reversed state.
[0055] As mentioned above, the depressurization block 8 is provided lying over the pipes
3 and 4 in both the unit booms 1 and 2, and the depressurization block 8 is provided
with the main passages 9 to which the pipes 3 and 4 are connected, the depressurization
valves 10 for removing the oil from the main passages 9 by the opening operation from
the exterior, and the drain passage 11 for joining and guiding the oil removed to
the drain ports 27 of the depressurization valves 10 to the exterior. At the time
of assembling the boom, the oil in the pipes 3 and 4 is all removed. Therefore, it
is possible to highly improve a work efficiency of depressurization in comparison
to the case where a depressurization work is performed for every pipe.
[0056] Further, the pipes 3 and 4 are formed so as to be opened and closed individually
by the depressurization valves 10. Therefore, there are no risks such as removal of
oil from all the pipes due to damage of a valve as in the technique of Patent Document
2.
[0057] The present embodiment also has the following effects.
- (I) It is possible to perform the opening operation to all the depressurization valves
10 at the same time by the push plate 29. Therefore, the work efficiency of the depressurization
is further improved.
- (II) It is possible to hold the push plate 29 in the operation state. Therefore, after
opening the depressurization valves 10, a worker does not have to hold the opening
state. That is, one worker can perform an opening operation and a collecting operation
of the removed oil.
Second Embodiment (refer to Fig. 8)
[0058] A description will be only given to different points from the first embodiment.
[0059] In the first embodiment, the push plate 29 is screwed to the depressurization block
8 (cover 31) in the operation state and the non-operation state, while in a second
embodiment, the push plate 29 is rotatably (reversibly) attached to the depressurization
block 8 (cover 31) by a hinge 33.
[0060] According to the configuration, it is easy to switch between the operation state
and the non-operation state of the push plate 29.
[0061] In the second embodiment, the point that both front and back surfaces of the push
plate 29 are desirably painted by different colors from each other is the same as
the first embodiment.
Third Embodiment (refer to Figs. 9, 10A and 10B)
[0062] In the first and second embodiments, the push plate 29 serves both as the operation
body for performing the opening operation to all the depressurization valves 10 at
the same time, and an interlock member for preventing the trouble that the work is
started in the state that the depressurization valves 10 are opened, while in a third
embodiment, each of the depressurization valves 10 is separately operated, and an
interlock plate 34 serving as an exclusive member for interlock exclusively ensures
only an interlock function.
[0063] That is, each of the depressurization valves 10 is provided with a long and thin
knob 10a serving as the operation element on the upper surface side, and opened and
closed by a rotating operation of the knob 10a at substantially 90 degrees. Specifically,
for example, the depressurization valve 10 shown in Fig. 6 can be formed such that
the operation element 17 is rotatably provided, the knob 10a is attached to an upper
surface thereof, a passage having a horizontal hole shape is provided in a side wall
opposing to the valve body 16, and by rotation of the operation element 17, the passage
is communicated to and/or blocked from the horizontal hole 23 of the valve body 16.
[0064] Meanwhile, on a back surface of the interlock plate 34, are provided a plurality
of protrusions 35 at the same interval as the knobs 10a.
[0065] Each of the protrusions 35 comprises a pair of protruding pieces 35a arranged in
parallel at an interval. Only in a state that the knobs 10a are located on closed
positions, the knobs 10a are fitted between both the protruding pieces 35a as shown
in Fig. 10A.
[0066] In other words, when the knobs 10a are in the opening state, the knobs 10a are interfering
with both the protruding pieces 35a and not fitted between both the protruding pieces
35a as shown in Fig. 10B. The interlock plate 34 cannot be rightly attached over the
depressurization block 8 (cover 31) and cannot be screwed.
[0067] Therefore, when the interlock plate 34 is not rightly attached, it is clearly shown
that the depressurization valves 10 are in the opening state. Consequently, the interlock
function is certainly achieved.
[0068] It should be noted that the interlock plate 34 may be not only screwed but also rotatably
attached to the depressurization block 8 (cover 31) by a hinge as in the second embodiment.
Other Embodiment
[0069]
- (1) A specific structure of the depressurization valves 10 can be variously changed
except for exemplified structures in the above embodiments. The point is, the structure
is to communicate the main passages 9 of the depressurization block 8 to the drain
passage 11 by the pressing operation, the rotating operation, an inclining operation
or the like of the operation elements.
As a variation of the depressurization valves mentioned above, the operation elements
may be automatically held on pressing positions (valve opening positions), and when
pushed once again, raised and restored to the closed positions.
- (2) The present invention is not limited to the demolition machine but widely applied
to various working machines in which a working attachment is formed by a plurality
of attachment pieces so as to be freely assembled and dismantled and hydraulic pipes
are provided in the working attachment, such as a scrap loader for conveying waste
materials and the like.
[0070] The present invention can be applied not only to the working attachment but also
to parts in a working machine in which the hydraulic pipe is divided into a plurality
of unit pipes and the unit pipes are connected to each other by joints.
[0071] Although the invention has been described with reference to the preferred embodiments
in the attached figures, it is noted that equivalents may be employed and substitutions
made herein without departing from the scope of the invention as recited in the claims.
[0072] A depressurization block 8 is provided lying over a plurality of hydraulic pipes
3 and 4. The depressurization block 8 is provided with main passages to which the
pipes 3 and 4 are connected, depressurization valves 10 for removing oil on the inside
of the pipes by an opening operation from the exterior, and a drain passage for joining
and guiding the oil removed from the depressurization valves 10, and the oil in all
the pipes 3 and 4 is all removed to the exterior. An opening operation is performed
to operation elements of the depressurization valves 10 at the same time by a push
plate having protrusions and the operation elements are held in an opening state.
1. A depressurization apparatus for hydraulic pipe comprising a depressurization block
(8), characterized in that said depressurization block (8) is provided with
a plurality of main passages (9) to which a plurality of hydraulic pipes (3, 4) are
connected,
depressurization valves (10) for removing oil on the inside of the hydraulic pipes
through said main passages (9) by an opening operation from the exterior,
a drain passage (11) for joining and guiding the oil removed from said depressurization
valves (10) to the exterior, and
a plate (29; 34) for determining an opening state of the depressurization valves (10).
2. The depressurization apparatus for hydraulic pipe according to claim 1, wherein each
of said depressurization valves (10) is provided with an operation element (17) for
opening a drain port (27) by a pressing operation from the exterior, and said plate
is an operation body (29) having a plurality of operation portions (30) for performing
the pressing operation to all the operation elements (17) at the same time is provided.
3. The depressurization apparatus for hydraulic pipe according to claim 2, wherein said
operation body (29) is adapted to be held to said depressurization block (8) in an
operation state in that said operation portions (30) perform the pressing operation
to all the operation elements (17).
4. The depressurization apparatus for hydraulic pipe according to claim 3, wherein said
operation portions (30) are provided on a back surface of said operation body (29)
and said operation body (29) is adapted to be held to said depressurization block
(8) in a reversed and non-operation state.
5. The depressurization apparatus for hydraulic pipe according to claim 4, wherein said
operation body (29) is attached to said depressurization block (8) through a hinge
(33) so as to be rotated and reversed.
6. The depressurization apparatus for hydraulic pipe according to claim 4 or 5, wherein
both front and back surfaces of said operation body (29) are painted by colors being
different from each other.
7. The depressurization apparatus for hydraulic pipe according to claim 1, wherein each
of said depressurization valves (10) is provided with an operation element (17) for
opening a drain port (27) by an operation from the exterior, and said plate (34) is
an interlock member (34) to be attached to said depressurization block (8) only in
a state that all the operation elements (17) are located in closed positions is provided.
8. The depressurization apparatus for hydraulic pipe according to claim 7, wherein each
of said depressurization valves (10) is provided with a knob (10a) rotated and operated
between an open position where said drain port (27) is opened and a closed position
where said drain port (27) is closed, and said interlock member (34) is provided with
protrusions (30) not interfering with said knobs (10a) only in a state that said knobs
(10a) are located in the closed positions on a back surface of said plate (34) lying
over said depressurization valves (10).
9. A hydraulic pipe structure,
characterized in that:
said depressurization block (8) of the depressurization apparatus according to any
of claims 1 to 8 is provided lying over a plurality of hydraulic pipes (3, 4), the
hydraulic pipes (3, 4) are connected to main passages (9) of said depressurization
block (8) and an opening operation is performed to depressurization valves (10), thereby
removing all oil on the inside of the hydraulic pipes (3, 4) to the exterior through
said main passages (9) and said drain passage (11).
1. Druckablassvorrichtung für eine Hydraulikleitung, die einen Druckablassblock (8) aufweist,
dadurch gekennzeichnet, dass der Druckablassblock (8) mit folgendem versehen ist
einer Vielzahl von Hauptdurchgängen (9), mit denen eine Vielzahl von Hydraulikleitungen
(3, 4) verbunden ist,
Druckablassventilen (10) zum Entfernen von Öl an der Innenseite der Hydraulikleitungen
durch die Hauptdurchgänge (9) durch einen Öffnungsbetrieb von außen,
einem Ablassdurchgang (11) zum Zusammenführen und Leiten des Öls, das von den Druckablassventilen
(10) entfernt ist, nach außen, und
einer Platte (29; 34) zum Bestimmen eines Öffnungszustands der Druckablassventile
(10).
2. Druckablassvorrichtung für eine Hydraulikleitung nach Anspruch 1, wobei jedes von
den Druckablassventilen (10) mit einem Betätigungselement (17) zum Öffnen eines Ablassanschlusses
(27) durch eine Drückbetätigung von außen versehen ist und die Platte ein Betätigungskörper
(29) ist, der eine Vielzahl von Betätigungsabschnitten (30) zum Durchführen der Drückbetätigung
an all die Betätigungselemente (17) zur gleichen Zeit aufweist.
3. Druckablassvorrichtung für eine Hydraulikleitung nach Anspruch 2, wobei der Betätigungskörper
(29) angepasst ist, um an dem Druckablassblock (8) in einem Betriebszustand gehalten
zu werden, in dem die Betätigungsabschnitte (30) die Drückbetätigung an all die Betätigungselement
(17) durchführt.
4. Druckablassvorrichtung für eine Hydraulikleitung nach Anspruch 3, wobei die Betätigungsabschnitte
(30) an einer Rückfläche des Betätigungskörpers (29) vorgesehen sind und der Betätigungskörper
(29) angepasst ist, um an dem Druckablassblock (8) in einem umgekehrten und nicht
betrieblichen Zustand gehalten zu werden.
5. Druckablassvorrichtung für eine Hydraulikleitung nach Anspruch 4, wobei der Betätigungskörper
(29) durch ein Gelenk (33) an dem Druckablassblock (8) befestigt ist, um gedreht und
umgedreht zu werden.
6. Druckablassvorrichtung für eine Hydraulikleitung nach Anspruch 4 oder 5, wobei sowohl
eine vordere als auch eine hintere Fläche des Betätigungskörpers (29) in voneinander
unterschiedlichen Farben gefärbt sind.
7. Druckablassvorrichtung für eine Hydraulikleitung nach Anspruch 1, wobei jedes von
den Druckablassventilen (10) mit einem Betätigungselement (17) zum Öffnen eines Ablassanschlusses
(27) durch eine Betätigung von außen versehen ist und die Platte (34) ein Sperrbauteil
(34) ist, das nur in einem Zustand an dem Druckablassblock (8) befestigt wird, in
dem sich all die Betätigungselemente (17) in geschlossenen Positionen befinden.
8. Druckablassvorrichtung für eine Hydraulikleitung nach Anspruch 7, wobei jedes von
den Druckablassventilen (10) mit einem Knopf (10a) versehen ist, der sich dreht und
zwischen einer offenen Position, an der der Ablassanschluss (27) geöffnet ist, und
einer geschlossenen Position betätigt wird, an der der Ablassanschluss (27) geschlossen
ist, und das Sperrbauteil (34) mit Vorsprüngen (30) versehen ist, die nicht mit den
Knöpfen (10a) in Konflikt geraten, nur in einem Zustand, in dem sich die Knöpfe (10a)
in den geschlossenen Positionen an einer hinteren Fläche der Platte (34) befinden,
die über den Druckablassventilen (10) liegt.
9. Hydraulikleitungsaufbau,
dadurch gekennzeichnet, dass:
der Druckablassblock (8) der Druckablassvorrichtung nach einem der Ansprüche 1 bis
8 vorgesehen ist, der über einer Vielzahl von Hydraulikleitungen (3, 4) liegt, wobei
die Hydraulikleitungen (3, 4) mit Hauptdurchgängen (9) des Druckablassblocks (8) verbunden
sind und eine Öffnungsbetätigung an den Druckablassventilen (10) durchgeführt ist,
wodurch das ganze Öl in den Hydraulikleitungen (3, 4) durch die Hauptdurchgänge (9)
und den Ablassdurchgang (11) nach außen entfernt wird.
1. Appareil de décompression pour tuyau hydraulique comprenant un bloc de décompression
(8) caractérisé en ce que ledit bloc de décompression (8) est pourvu
d'une pluralité de passages principaux (9) auxquels sont raccordés une pluralité de
tuyaux hydrauliques (3, 4),
de soupapes de décompression (10) pour retirer l'huile sur la partie intérieure des
tuyaux hydrauliques à travers lesdits passages principaux (9) par une opération d'ouverture
depuis l'extérieur,
d'un passage de drainage (11) pour joindre et guider l'huile retirée desdites soupapes
de décompression (10) vers l'extérieur, et
d'une plaque (29 ; 34) pour déterminer un état d'ouverture des soupapes de décompression
(10).
2. Appareil de décompression pour tuyau hydraulique selon la revendication 1, dans lequel
chacune desdites soupapes de décompression (10) est pourvue d'un élément d'actionnement
(17) pour ouvrir un orifice de drainage (27) par une opération de pressage depuis
l'extérieur, et ladite plaque est un corps d'actionnement (29) qui est pourvu, celui-ci
ayant une pluralité de parties d'actionnement (30) pour exécuter l'opération de pressage
à tous les éléments d'actionnement (17) en même temps.
3. Appareil de décompression pour tuyau hydraulique selon la revendication 2, dans lequel
ledit corps d'actionnement (29) est adapté pour être maintenu audit bloc de décompression
(8) dans un état d'actionnement en ce que lesdites parties d'actionnement (30) exécutent
l'opération de pressage à tous les éléments d'actionnement (17).
4. Appareil de décompression pour tuyau hydraulique selon la revendication 3, dans lequel
lesdites parties d'actionnement (30) sont pourvues sur une surface arrière dudit corps
d'actionnement (29) et ledit corps d'actionnement (29) est adapté pour être maintenu
audit bloc de décompression (8) dans un état inversé et de non-actionnement.
5. Appareil de décompression pour tuyau hydraulique selon la revendication 4, dans lequel
ledit corps d'actionnement (29) est fixé audit bloc de décompression (8) à travers
une articulation (33) de manière à être mis en rotation et inversé.
6. Appareil de décompression pour tuyau hydraulique selon la revendication 4 ou 5, dans
lequel à la fois les surfaces avant et arrière dudit corps d'actionnement (29) sont
peintes par des couleurs différentes les unes des autres.
7. Appareil de décompression pour tuyau hydraulique selon la revendication 1, dans lequel
chacune desdites soupapes de décompression (10) est pourvue d'un élément d'actionnement
(17) pour ouvrir un orifice de drainage (27) par une opération depuis l'extérieur,
et ladite plaque (34) est un élément d'inter-verrouillage (34) qui est pourvu, celui-ci
ne doit être fixé audit bloc de décompression (8) que dans un état où tous les éléments
d'actionnement (17) sont situés dans des positions fermées,.
8. Appareil de décompression pour tuyau hydraulique selon la revendication 7, dans lequel
chacune desdites soupapes de décompression (10) est pourvue d'un bouton (10a) mis
en rotation et actionné entre une position ouverte où ledit orifice de drainage (27)
est ouvert et une position fermée où ledit orifice de drainage (27) est fermé, et
ledit élément d'inter-verrouillage (34) est pourvu de saillies (30) n'interférant
pas avec lesdits boutons (10a) uniquement dans un état où lesdits boutons (10a) sont
situés dans les parties fermées sur une surface arrière de ladite Plaque (34) s'étendant
sur lesdites soupapes de décompression (10).
9. Structure de tuyau hydraulique, caractérisée en ce que : ledit bloc de décompression (8) de l'appareil de décompression selon l'une des
revendications 1 à 8 est pourvu en s'étendant sur une pluralité de tuyaux hydrauliques
(3, 4), les tuyaux hydrauliques (3, 4) sont raccordés à des passages principaux (9)
dudit bloc de décompression (8) et une opération d'ouverture est exécutée sur des
soupapes de décompression (10), retirant ainsi la totalité de l'huile sur la partie
intérieure des tuyaux hydrauliques (3, 4) vers l'extérieur à travers lesdits passages
principaux (9) et ledit passage de drainage (11).