Technical Field
[0001] The present disclosure relates to a fixed type hot coil thermal insulation heat treatment
device.
Background Art
[0002] The production of cold-rolled ultra-high-strength steel mainly has the problem of
large performance fluctuation in the length and width directions of the strip steel,
which results in severe fluctuation in rolling force during cold rolling production
and failure to meet the tolerance standard for the thickness of final cold-rolled
products. Not only the rolling stability of cold-rolling - pickling - continuous rolling
mills is influenced, but also the yield rate of cold-rolled ultra-high-strength steel
is seriously affected.
[0003] The existing thermal insulation devices are as follows:
- (1) The most prominent problem of a rolling line thermal insulation device is that
the interval between coiling of strip steel and entry of a steel coil into the insulation
device is so long that metallographic structure transformation of the strip steel
has already occurred or has been completed. The effect of off-line slow cooling in
improving hot coil performances cannot meet the quality requirements for high-strength
steel. A hot rolling production line adopts a thermal insulation pit set downstream
of a coiler. A rolled steel coil is first conveyed by a transport chain or the like,
and then hoisted by a bridge crane and placed in a thermal insulation pit that has
a certain thermal insulation capacity. It will take a period of time as long as 20-30
minutes to hoist and transfer the hot coil into a thermal insulation enclosure, such
that the air cooling time of the steel coil is too long, which affects the thermal
insulation effect and material properties.
- (2) The cost of adding special thermal insulation pits, thermal insulation furnaces,
bell furnaces, heat treatment and the like to such thermal insulation devices is generally
high. Moreover, it takes a long period of time to retrofit the devices, and thus normal
production will be affected. In addition, there is a problem that the thermal insulation
effect is not good (i.e. temperature drops fast).
Summary
[0004] An object of the present disclosure is to design a fixed type hot coil thermal insulation
heat treatment device. After coiling, the steel coil is thermally insulated immediately,
so as to reduce the transferring time between the coiling and the thermal insulation,
and use the heat of the steel coil itself to implement a heat treatment process including
soaking and slow cooling of the steel coil to achieve the goals of high efficiency,
energy saving and high yield rate.
[0005] To achieve the above object, the technical solution of the present disclosure is
as follows:
There is provided a fixed type hot coil thermal insulation heat treatment device,
comprising: a steel coil tray; at least one steel coil supporting prop provided on
the steel coil tray; and a thermal insulation enclosure disposed around the steel
coil supporting prop, wherein the thermal insulation enclosure has an inner chamber
having a volume larger than a combined volume of at least one steel coil + one steel
coil supporting prop, and a lower end of the thermal insulation enclosure is movably
coupled to the steel coil tray.
[0006] Further, the fixed type hot coil thermal insulation heat treatment device further
comprises an electric heating device provided on an inner side wall of the thermal
insulation enclosure; a temperature sensor provided in the thermal insulation enclosure;
and an information acquisition control module, wherein the electric heating device
and the temperature sensor are electrically coupled to the information acquisition
control module. The thermal insulation enclosure not only enables use of residual
heat of the hot-rolled steel coil to achieve slow cooling, but also allows for secondary
heat treatment on some special steel materials to implement secondary tempering to
improve the performances of the steel coil and refine grains.
[0007] Still further, the thermal insulation enclosure is further provided with a gas protection
device capable of introducing a protective gas and a gas sensor which are electrically
coupled to the information acquisition control module, respectively. A protective
gas is introduced into the thermal insulation enclosure to replace the air around
the steel coil. Oxidation of the steel coil and increase of the surface mass of the
steel coil can thus be prevented.
[0008] Yet further, a signal emitting module is provided in the information acquisition
control module to transmit data of air and temperature in the thermal insulation enclosure
to a ground server.
[0009] Preferably, the thermal insulation enclosure has a composite structure, comprising:
an outer protection layer, which is a high-strength steel plate; an intermediate layer,
which is a thermal insulation material; and an inner layer, which is a high temperature
resistant stainless steel plate.
[0010] Preferably, the thermal insulation enclosure is a composite structure, comprising
an inner radiation layer, an electric heating wire layer, an intermediate mesh cover,
an intermediate thermal insulation layer, and an outer protection layer in order from
inside to outside.
[0011] Preferably, the composite structure of the thermal insulation enclosure is fixed
with an anchor nail.
[0012] Preferably, the thermal insulation enclosure is a square thermal insulation enclosure
or a circular thermal insulation enclosure.
[0013] Preferably, a positioning sleeve is provided on a lower part of a side of the thermal
insulation enclosure. Correspondingly, a positioning pin matching the positioning
sleeve is provided on the steel coil tray. The positioning pin is preferably a cone-shaped
body. When the steel coil is unloaded from the coiler cavity onto the tray, the thermal
insulation enclosure can be automatically positioned by placing it on the cone-shaped
positioning pin, so that the thermal insulation enclosure can be quickly installed
and positioned to form a closed space to ensure that the heat will not be lost.
[0014] Preferably, the thermal insulation enclosure is provided with a ventilation hole
and a corresponding exhaust valve. A ventilation hole is added in the thermal insulation
enclosure, and an exhaust valve is installed. After the steel coil that has been coiled
as a hot coil is placed on the transport chain tray and covered with the thermal insulation
enclosure device, the temperature in the internal space is 600 °C or higher. In addition,
while the strip steel is coiled and the steel coil is cooled by laminar flow, a small
amount of water vapor is adhered to the surface of the steel coil. In order to ensure
the safety of the equipment and improve the quality of the steel coil, the high-temperature
gas is expelled before the protective gas is introduced into the thermal insulation
enclosure.
[0015] Preferably, the electric heating device is an electric heating wire, and the temperature
sensor is a thermocouple for detecting change of air temperature inside the thermal
insulation enclosure.
[0016] Preferably, the steel coil tray has a composite structure, comprising a base plate,
a thermal insulation layer, and an internal radiation layer in order from bottom to
top.
[0017] After the strip steel is coiled and transported to the fixed type thermal insulation
enclosure tray, the thermal insulation enclosure is placed on the tray immediately
to insulate the steel coil at the earliest time, thereby implementing thermal insulation
treatment on the steel coil after the strip steel has been coiled.
[0018] In order to increase the processing capacity of the hot coil thermal insulation and
slow cooling device, steel coil trays for single-row, double-row and multi-row steel
coils may be made.
[0019] The beneficial effects of the present disclosure include:
The thermal insulation enclosure according to the present disclosure exists individually
and independently. This saves time, and also improves production rhythm and efficiency.
[0020] According to the present disclosure, after coiling, the strip steel coil is subjected
to thermal insulation treatment at the earliest time. This will greatly address the
challenges of insufficient performance improvement caused by the excessively long
time from coiling to entry of the steel coil to the slow cooling device, and large
performance fluctuation of the strip steel in the length and width directions. In
addition, severe fluctuation of rolling force in cold rolling production, and failure
to meet the tolerance standard for the thickness of final cold-rolled products are
avoided. The rolling stability of cold-rolling - pickling - continuous rolling mills
is improved, and the yield rate of cold-rolled ultra-high-strength steel is increased.
[0021] The structure design of the present disclosure has the characteristics of light structure
weight, good thermal insulation effect, convenient steel coil loading and unloading,
high degree of automation, good airtightness, etc., and has further optimized the
equipment's thermal insulating, soaking and oxidation resisting effects.
[0022] By adopting the latest all-fiber annealing furnace technology standards in combination
with the concept of light-weight structure of high-strength steel, an energy-saving
green steel coil transport device, which meets certain airtightness requirements,
has certain temperature control function and insulating and soaking effects, and is
capable of full-automatic operation, is designed to achieve the best effect of improving
high-strength steel performances.
Description of the Drawings
[0023]
Fig. 1 is a front view of an example according to the present disclosure.
Fig. 2 is a side view of an example according to the present disclosure.
Fig. 3 is a schematic structural view of the steel coil supporting prop and steel
coil tray in an example according to the present disclosure.
Fig. 4 is a schematic structural view of a positioning pin matching a positioning
sleeve of the thermal insulation enclosure in an example according to the present
disclosure.
Fig. 5 is a cutaway view of the thermal insulation enclosure in an example according
to the present disclosure.
Detailed Embodiments
[0024] Referring to Figs. 1-5, the fixed type hot coil thermal insulation heat treatment
device according to the present disclosure comprises:
a steel coil tray 1;
at least one steel coil supporting prop 2 provided on the steel coil tray 1; and
a thermal insulation enclosure 3 provided around the steel coil supporting prop 2,
wherein the thermal insulation enclosure has an inner chamber having a volume larger
than a combined volume of at least one steel coil 100 + one steel coil supporting
prop 2, and a lower end of the thermal insulation enclosure 3 is movably coupled to
the steel coil tray 1.
[0025] Further, the fixed type hot coil thermal insulation heat treatment device further
comprises:
an electric heating device 4 provided on an inner side wall of the thermal insulation
enclosure 3;
a temperature sensor 5 provided in the thermal insulation enclosure 3; and
an information acquisition control module 6, wherein the electric heating device 4
and the temperature sensor 6 are electrically coupled to the information acquisition
control module 6.
[0026] Still further, the thermal insulation enclosure 3 is further provided with a gas
protection device 7 capable of introducing a protective gas and a gas sensor which
are electrically coupled to the information acquisition control module 6, respectively.
After the steel coil that has been coiled as a hot coil is placed on the transport
chain tray, the steel coil is covered with the thermal insulation enclosure to protect
the steel coil from oxidation which will otherwise increase the surface mass of the
steel coil. A protective gas is introduced into the thermal insulation enclosure to
replace the air around the steel coil. Oxidation of the steel coil and increase of
the surface mass of the steel coil can thus be prevented.
[0027] Yet further, a signal emitting module is provided in the information acquisition
control module 6 to transmit data of air and temperature in the thermal insulation
enclosure 3 to a ground server, and transmit data and information related with the
steel coil downstream at the same time. By using a wireless remote control box with
the aid of a wireless device and a power storage device, functions such as mobile
temperature measurement and sampling from the thermal insulation enclosure, wireless
data transmission, and logistics information writing and reading are implemented.
[0028] Preferably, the thermal insulation enclosure 3 has a composite structure, comprising:
an outer protection layer, which is a high-strength steel plate; an intermediate layer,
which is a thermal insulation material; and an inner layer, which is a high temperature
resistant stainless steel plate.
[0029] Referring to Fig. 5, the thermal insulation enclosure 3 according to the present
disclosure is a composite structure, comprising an inner radiation layer 31, an electric
heating wire layer 32, an intermediate mesh cover 33, an intermediate thermal insulation
layer 34, and an outer protection layer 35 in order from inside to outside; wherein
the composite structure of the thermal insulation enclosure 3 is fixed with an anchor
nail 35.
[0030] Preferably, the thermal insulation enclosure 3 is a square thermal insulation enclosure
or a circular thermal insulation enclosure.
[0031] Preferably, a positioning sleeve 8 is provided on a lower part of a side of the thermal
insulation enclosure 3. Correspondingly, a positioning pin 9 matching the positioning
sleeve 8 is provided on the steel coil tray 1. The positioning pin 9 is preferably
a cone-shaped body.
[0032] When the steel coil is unloaded from the coiler onto the tray, automatic positioning
can be accomplished by placing the positioning sleeve of the thermal insulation enclosure
on the cone-shaped positioning pin, so that the thermal insulation enclosure can be
quickly installed and positioned to form a closed space to ensure that the heat will
not be lost.
[0033] Preferably, the thermal insulation enclosure 3 is provided with a ventilation hole
and a corresponding exhaust valve 10. After the steel coil that has been coiled as
a hot coil is placed on the transport chain tray and covered with the thermal insulation
enclosure device, the temperature in the internal space is 600 °C or higher. In addition,
while the strip steel is coiled and the steel coil is cooled by laminar flow, a small
amount of water vapor is adhered to the surface of the steel coil. In order to ensure
the safety of the equipment and improve the quality of the steel coil, the high-temperature
gas is expelled before the protective gas is introduced into the thermal insulation
enclosure.
[0034] Preferably, the electric heating device 4 is an electric heating wire, and the temperature
sensor 5 is a thermocouple. The thermal insulation enclosure not only enables use
of residual heat of the hot-rolled steel coil to achieve slow cooling, but also allows
for secondary heat treatment on some special steel materials to implement secondary
tempering to improve the performances of the steel coil and refine grains.
[0035] Preferably, the steel coil tray 1 has a composite structure, comprising a base plate
11, a thermal insulation layer 12, and an internal radiation layer 13 in order from
bottom to top.
[0036] The fixed type hot coil thermal insulation heat treatment device according to the
present disclosure is located near the steel coiling work station. After the coiling
is completed, the hot rolled steel coil is immediately transferred into the thermal
insulation heat treatment device to implement the thermal insulation treatment on
the steel coil after the coiling of the strip steel.
[0037] The present disclosure fulfils the purpose of annealing treatment by making use of
the residual heat in the steel coil that has just been coiled, which greatly addresses
the challenges of insufficient performance improvement caused by the excessively long
time from coiling to entry of the steel coil to the insulating and annealing device,
and large performance fluctuation of the strip steel in the length and width directions.
A special batch of hot-rolled strip steel may need to be subjected to special treatment
such as in-depth processing. The heating device and protective cooling gas input system
integrated within the thermal insulation enclosure can cooperate to achieve temperature
control under necessary conditions.
1. A fixed type hot coil thermal insulation heat treatment device, comprising:
a steel coil tray;
at least one steel coil supporting prop provided on the steel coil tray;
a thermal insulation enclosure provided around the steel coil supporting prop, wherein
the thermal insulation enclosure has an inner chamber having a volume larger than
a combined volume of at least one steel coil + one steel coil supporting prop, and
a lower end of the thermal insulation enclosure is movably coupled to the steel coil
tray.
2. The fixed type hot coil thermal insulation heat treatment device according to claim
1, further comprising:
an electric heating device provided on an inner side wall of the thermal insulation
enclosure;
a temperature sensor provided in the thermal insulation enclosure; and
an information acquisition control module, wherein the electric heating device and
the temperature sensor are electrically coupled to the information acquisition control
module.
3. The fixed type hot coil thermal insulation heat treatment device according to claim
1 or 2, wherein the thermal insulation enclosure is further provided with a gas protection
device capable of introducing a protective gas and a gas sensor which are electrically
coupled to the information acquisition control module, respectively.
4. The fixed type hot coil thermal insulation heat treatment device according to claim
1 or 2 or 3, wherein a signal emitting module is provided in the information acquisition
control module to transmit data of air and temperature in the thermal insulation enclosure
to a ground server.
5. The fixed type hot coil thermal insulation heat treatment device according to claim
1 or 2 or 3, wherein a positioning sleeve is provided on a lower part of a side of
the thermal insulation enclosure; correspondingly, a positioning pin matching the
positioning sleeve is provided on the steel coil tray; wherein the positioning pin
is preferably a cone-shaped body.
6. The fixed type hot coil thermal insulation heat treatment device according to claim
1 or 2 or 3 or 5, wherein the thermal insulation enclosure is provided with a ventilation
hole and a corresponding exhaust valve.
7. The fixed type hot coil thermal insulation heat treatment device according to claim
1, wherein the electric heating device is an electric heating wire, and the temperature
sensor is a thermocouple.
8. The fixed type hot coil thermal insulation heat treatment device according to claim
1 or 2 or 3 or 5, wherein the thermal insulation enclosure has a composite structure,
comprising: an outer protection layer, which is a high-strength steel plate; an intermediate
layer, which is a thermal insulation material; and an inner layer, which is a high
temperature resistant stainless steel plate.
9. The fixed type hot coil thermal insulation heat treatment device according to claim
1 or 2 or 3 or 5, wherein the thermal insulation enclosure is a composite structure,
comprising an inner radiation layer, an electric heating wire layer, an intermediate
mesh cover, an intermediate thermal insulation layer, and an outer protection layer
in order from inside to outside.
10. The fixed type hot coil thermal insulation heat treatment device according to claim
1, wherein the steel coil tray has a composite structure, comprising a base plate,
a thermal insulation layer, and an internal radiation layer in order from bottom to
top.