CN211570734U - Liquid nitrogen cryogenic device for improving quenching depth of roller body - Google Patents
Liquid nitrogen cryogenic device for improving quenching depth of roller body Download PDFInfo
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- CN211570734U CN211570734U CN202020052152.7U CN202020052152U CN211570734U CN 211570734 U CN211570734 U CN 211570734U CN 202020052152 U CN202020052152 U CN 202020052152U CN 211570734 U CN211570734 U CN 211570734U
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- liquid nitrogen
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- storage tank
- cooling storage
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 195
- 239000007788 liquid Substances 0.000 title claims abstract description 102
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 96
- 238000010791 quenching Methods 0.000 title claims abstract description 33
- 230000000171 quenching effect Effects 0.000 title claims abstract description 32
- 238000001816 cooling Methods 0.000 claims abstract description 63
- 238000003860 storage Methods 0.000 claims abstract description 43
- 239000006200 vaporizer Substances 0.000 claims abstract description 6
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- 238000009413 insulation Methods 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 238000004321 preservation Methods 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 6
- 239000012774 insulation material Substances 0.000 claims description 3
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- 238000004519 manufacturing process Methods 0.000 description 4
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- 230000005855 radiation Effects 0.000 description 3
- 239000010963 304 stainless steel Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 2
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- 239000008358 core component Substances 0.000 description 2
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- 238000004378 air conditioning Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
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- 238000005266 casting Methods 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
A liquid nitrogen deep cooling device for improving the quenching depth of a roller body of a roller comprises a box body, wherein the box body comprises an outer box body, an inner box body and a liquid nitrogen device, the inner box body and the liquid nitrogen device are arranged inside the outer box body, and one side of the inner box body is provided with the liquid nitrogen device and connected with the liquid nitrogen device; the inner box body comprises a cooling storage tank and a working chamber, the liquid nitrogen device comprises a liquid nitrogen tank and a liquid conveying pipe, and the liquid nitrogen tank is connected with the cooling storage tank through the liquid conveying pipe; the working chamber is nested in the cooling storage tank, liquid nitrogen is contained in the cooling storage tank, a liquid nitrogen vaporizer is installed between the cooling storage tank and the working chamber, and a fan is installed on the wall of the cooling storage tank. A liquid nitrogen cryrogenic device for improving roll shaft quenching degree of depth, the device is simple, both improved roll shaft quenching degree of depth, can improve the mechanical properties and the life of roll again, stable size improves the homogeneity, reduces deformation etc. increases the wearability, and application prospect is extensive.
Description
Technical Field
The utility model relates to a roll quenching technical field, concretely relates to liquid nitrogen cryrogenic device for improving roll body quenching degree of depth.
Background
Rolls, the main working parts and tools on rolling mills that produce continuous plastic deformation of metals. The roller mainly comprises a roller body, a roller neck and a shaft head 3. The roll body is the intermediate portion of the roll that actually participates in rolling metal and has a smooth cylindrical or grooved surface. The roll neck is mounted in bearings and transmits the rolling force to the stand through a bearing block and a screw down device. The driving end shaft head is connected with the gear seat through a connecting shaft, and the rotating torque of the motor is transmitted to the roller. The rolls may be arranged in two, three, four or more rolls in the mill stand.
The classification method of the roll includes (1) a strip roll, a section roll, a wire roll, etc. according to the product type, (2) a cogging roll, a roughing roll, a finishing roll, etc. according to the position of the roll in the rolling mill series, (3) a scale breaking roll, a perforation roll, a leveling roll, etc. according to the roll function, (4) a steel roll, a cast iron roll, a cemented carbide roll, a ceramic roll, etc. according to the roll material, (5) a casting roll, a forging roll, a build-up welding roll, a bushing roll, etc. according to the manufacturing method, and (6) a hot roll, a cold roll according to the state of the rolled steel material. The various classifications can be combined to make the rolls have a more definite meaning, such as centrifugally cast high-chromium cast iron work rolls for hot-rolled steel strip.
In the production process of the roller, quenching of the roller body of the roller is an important process. The design of the liquid nitrogen deep cooling device for the roller body of the roller is generated according to the problem that the roller is difficult to quench. The liquid nitrogen deep cooling device is used for reducing the temperature of the material to a certain temperature (generally considered to be lower than-130 ℃) which is far lower than the room temperature, and the temperature is kept for a period of time, so that the structural form of the material is further converted, the mechanical property and the service life of the steel material, the nonferrous metal and the composite material are improved, the size is stabilized, the uniformity is improved, the deformation is reduced, and the like. Therefore, theoretically, the quenching depth of the roller body of the roller is improved by carrying out liquid nitrogen deep cooling treatment on the roller body of the roller, the wear resistance of the roller is improved, and the service life is prolonged. The liquid nitrogen cryogenic device uses liquid nitrogen as a cold source medium. The liquid nitrogen is a byproduct in the oxygen production industry, and has the advantages of wide source, low price, stable chemical performance and no pollution. The liquid nitrogen cryogenic device conforms to the innovation driving of current China manufacturing 2025, the basic guideline of green development, and has wide application prospect at present when the environmental pollution is more and more serious.
Chinese patent application No. CN201720658972.9 discloses an automatic demoulding device for roller, the deep cooling box includes deep cooling box body and deep cooling box heat preservation lid, the deep cooling box is provided with the nozzle, connect on the liquid nitrogen supply jar, the bottom plate is fixed with elevating gear, through the position of lift adjustment roller for the nozzle, increase the quenching degree of depth, satisfy the requirement on super thick quench-hardened layer, improve the life of roller. However, the device has a complex structure, no temperature control component is arranged, the temperature controllability in the cryogenic treatment process is low, the temperature is uneven, the roller is in direct contact with liquid nitrogen, the frosting on the surface of a workpiece is easily caused, the roller is damaged, the defective rate is high, and the batch cryogenic treatment is difficult to carry out.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to overcome not enough above, the utility model aims at providing a liquid nitrogen cryrogenic device for improving roll shaft quenching degree of depth, the device is simple, easy to operate, it is high at liquid nitrogen cryrogenic treatment process temperature controllability, the temperature is even, roll and liquid nitrogen direct contact, the cooling rate is fast, and the surface does not frost, do not harm the roll, the yield is high, can carry out batchization cryrogenic treatment, the quenching degree of depth of roll shaft has been improved, the mechanical properties and the life of roll have also been improved, the stable size, improve the homogeneity, reduce deformation etc., increase the wearability, application prospect is extensive. The technical scheme is as follows: a liquid nitrogen deep cooling device for improving the quenching depth of a roller body of a roller comprises a box body, wherein the box body comprises an outer box body, an inner box body and a liquid nitrogen device, the inner box body and the liquid nitrogen device are arranged inside the outer box body, and one side of the inner box body is provided with the liquid nitrogen device and connected with the liquid nitrogen device; the inner box body comprises a cooling storage tank and a working chamber, the liquid nitrogen device comprises a liquid nitrogen tank and a liquid conveying pipe, and the liquid nitrogen tank is connected with the cooling storage tank through the liquid conveying pipe; the working chamber is nested in the cooling storage tank, liquid nitrogen is contained in the cooling storage tank, a liquid nitrogen vaporizer is installed between the cooling storage tank and the working chamber, and a fan is installed on the wall of the cooling storage tank.
A liquid nitrogen cryrogenic device for improving roll shaft quenching degree of depth, place the roll in the studio, hold the liquid nitrogen in the cooling storage tank, become low temperature nitrogen gas through the liquid nitrogen carburetor liquid nitrogen in with the cooling storage tank, get into the studio, low temperature nitrogen gas and the roll direct contact in the studio, the cooling rate is fast, installs the fan on the cooling storage tank cell wall, promotes that air conditioning flows. At the moment, the heat convection is carried out between the cooling storage tank and the working chamber, and the radiation heat transfer is carried out between the working chamber and the roller.
Furthermore, the inner box body further comprises a vacuumizing device, and the vacuumizing device is connected with the working chamber.
Further, evacuating device includes vacuum pump, blast pipe, vacuum meter (1253), the vacuum pump pass through the blast pipe with the studio is connected, install the vacuum meter on the blast pipe.
Although the fans are arranged on the wall of the cooling storage tank and can promote the flow of cold air, the effect is relatively limited, when low-temperature nitrogen directly contacts with the roller, water vapor in the working chamber is condensed on the surface of the roller body of the roller, so that the surface of the roller is frosted, the roller is damaged, the defective rate is high, a low-vacuum environment is constructed in the working chamber through the vacuum pump and the exhaust pipe, and the frosting problem during the liquid nitrogen cryogenic treatment of the roller can be avoided.
Further, the inner box body further comprises a protective shell, the cooling storage tank, the working chamber and the vacuumizing device are installed in the protective shell, a display instrument is arranged on the outer wall of the protective shell and comprises a vacuum display instrument, and the vacuum display instrument is connected with the vacuum meter.
The vacuum display instrument can be used for seeing the vacuum pumping condition of the working chamber, and is convenient to adjust.
Further, the protective shell is made of double-layer stainless steel.
Furthermore, a heat insulation material is filled between the double layers of stainless steel of the protective shell.
The inner box body is made of double-layer stainless steel, and heat insulation materials are filled between the double-layer stainless steel, so that heat exchange between the inside and the outside of the inner box body can be reduced to the maximum extent.
Furthermore, a temperature sensor is arranged in the middle of the working chamber.
The liquid nitrogen subzero treatment process temperature among the prior art is uncontrollable, leads to the studio interior temperature inhomogeneous, when roll and low temperature nitrogen gas direct contact, very easily leads to roll surface frosting, damages the roll, and the defective percentage is high, is difficult to carry out batch subzero treatment, and temperature sensor is as the temperature measurement component, can measure liquid nitrogen subzero treatment process temperature, regulates and control the temperature of studio according to upper reaches control mechanism.
Furthermore, the display instrument further comprises a temperature display instrument, and the temperature display instrument is connected with the temperature sensor.
The temperature display instrument can be used for knowing the temperature condition of the working chamber, and is convenient to adjust.
Furthermore, a low-temperature electromagnetic valve is installed on the infusion tube.
The input quantity of the liquid nitrogen is controlled by a low-temperature electromagnetic valve during the liquid nitrogen subzero treatment, so that the subzero temperature change is controlled.
Further, the cooling storage tank includes heat preservation lid, dewar shell, dewar inner bag, the heat insulation layer is shielded to multilayer, skirt, the heat preservation lid level sets up dewar shell upper end, the inner bag is installed inside the dewar shell and the clearance packing of dewar shell, inner bag has the heat insulation layer is shielded to multilayer, the dewar shell is installed on the skirt.
The temperature of the liquid nitrogen is greatly different from the room temperature, so that the evaporation loss of the liquid nitrogen is reduced, the inner box body and the outer box body are prevented from frosting at low temperature, and the operation safety of the device is improved. The cooling storage tank takes a Dewar and a Dewar as core components and is designed to be adiabatic. In consideration of structural installation and safety, the cooling storage tank consists of a Dewar (Dewar shell and a Dewar inner container), a heat insulating layer, a neck opening and a skirt seat, wherein the Dewar inner container is a pressure container formed by welding a cylinder body and a seal head, one side of the upper part of the Dewar adopts a standard steel pressure container seal head, the cylinder body is made of 304 stainless steel, the Dewar shell is made of 304 stainless steel and mainly consists of an upper seal head, a lower seal head and the cylinder body, a gap between the Dewar shell and the Dewar inner container is filled with a plurality of layers of heat insulating layers, one end of the upper seal head of the Dewar shell is welded with the Dewar inner container, the bottom of the Dewar shell is provided with an air suction joint nozzle which is connected with an air suction pipe and a vacuum pump, and the skirt seat. The multi-layer multi-screen heat insulation structure belongs to high vacuum heat insulation, can eliminate two main factors of heat transfer, namely solid heat conduction and gas convection heat exchange, has main energy consumption loss from radiant heat, can greatly reduce the radiant heat by arranging the multi-layer multi-screen heat insulation layer in a heat insulation space, and is the best heat insulation mode with the current heat insulation effect.
The utility model has the advantages that:
(1) the liquid nitrogen deep cooling device for improving the quenching depth of the roller body of the roller has the advantages of simple device and simple operation, not only improves the quenching depth of the roller body of the roller, but also can improve the mechanical property and the service life of the roller, stabilizes the size, improves the uniformity, reduces the deformation and the like, increases the wear resistance, and has wide application prospect;
(2) the liquid nitrogen deep cooling device for improving the quenching depth of the roller body of the roller has the advantages that low-temperature nitrogen directly contacts with the roller in the working chamber, the cooling speed is high, the wall of the cooling storage tank is provided with the fan to promote the flow of cold air, the convection heat transfer is realized between the cooling storage tank and the working chamber, the radiation heat transfer is realized between the working chamber and the roller, and the efficiency is high;
(3) the liquid nitrogen cryogenic device for improving the quenching depth of the roller body of the roller constructs a low vacuum environment in a working chamber through the vacuum pump and the exhaust pipe, can avoid the frosting problem during the liquid nitrogen cryogenic treatment of the roller, does not damage the roller and has high yield;
(4) the liquid nitrogen cryogenic device for improving the quenching depth of the roller body of the roller can see the conditions of vacuumizing and temperature of a working chamber through a display instrument, is convenient to adjust, and controls the input quantity of liquid nitrogen through a low-temperature electromagnetic valve so as to control the cryogenic temperature change;
(5) a liquid nitrogen cryrogenic device for improving roll shaft quenching degree of depth, the cooling storage tank uses the dewar as core component to carry out adiabatic design through the heat insulation layer is shielded to the multilayer, solved liquid nitrogen temperature and room temperature and differed greatly, the evaporation loss of liquid nitrogen, interior box and outer box low temperature problem of frosting, improve the operational safety of device.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a liquid nitrogen deep cooling device for increasing the quenching depth of a roller body of a roller according to the present invention;
in the figure: the device comprises a box body 1, an outer box body 11, an inner box body 12, a cooling storage tank 121, a heat preservation cover 1211, a Dewar shell 1212, a Dewar inner container 1213, a multi-layer multi-screen heat insulation layer 1214, a skirt 1215, a working chamber 122, a liquid nitrogen vaporizer 123, a fan 124, a vacuumizing device 125, a vacuum pump 1251, an exhaust pipe 1252, a vacuum meter 1253, a protective shell 126, a heat preservation material 1261, a display instrument 127, a vacuum display instrument 1271, a temperature display instrument 1272, a temperature sensor 128, a liquid nitrogen device 13, a liquid nitrogen tank 131, a liquid conveying pipe 132 and a low-temperature electromagnetic valve 133.
Detailed Description
The invention will be further elucidated with reference to fig. 1 and an exemplary embodiment.
The liquid nitrogen deep cooling device with the structure as shown in fig. 1 for improving the quenching depth of the roller body of the roller comprises a box body 1, wherein the box body 1 comprises an outer box body 11, an inner box body 12 and a liquid nitrogen device 13, the inner box body 12 and the liquid nitrogen device 13 are installed inside the outer box body 11, and the liquid nitrogen device 13 is arranged on one side of the inner box body 12 and connected with the inner box body; the inner box body 12 comprises a cooling storage tank 121 and a working chamber 122, the liquid nitrogen device 13 comprises a liquid nitrogen tank 131 and a liquid conveying pipe 132, and the liquid nitrogen tank 131 is connected with the cooling storage tank 121 through the liquid conveying pipe 132; the working chamber 122 is nested in the cooling storage tank 121, the cooling storage tank 121 contains liquid nitrogen, a liquid nitrogen vaporizer 123 is installed between the cooling storage tank 121 and the working chamber 122, and a fan 124 is installed on the wall of the cooling storage tank 121.
Further, the inner box 12 further includes a vacuum device 125, and the vacuum device 125 is connected to the working chamber 122. The vacuum pumping device 125 includes a vacuum pump 1251, an exhaust pipe 1252, and a vacuum gauge 1253, the vacuum pump 1251 is connected to the working chamber 122 through the exhaust pipe 1252, and the vacuum gauge 1253 is installed on the exhaust pipe 1252.
In addition, the inner box 12 further comprises a protective casing 126, the cooling storage tank 121, the working chamber 122 and the vacuum-pumping device 125 are installed in the protective casing 126, a display instrument 127 is arranged on the outer wall of the protective casing 126, the display instrument 127 comprises a vacuum display instrument 1271, and the vacuum display instrument 1271 is connected with the vacuum meter 1253.
Further, the protective housing 126 is made of double-layer stainless steel. The heat insulating material 1261 is filled between the double layers of stainless steel of the protective shell 126.
Further, a low-temperature solenoid valve 133 is attached to the infusion tube 132.
In addition, the cooling sump 121 includes a thermal cover 1211, a dewar housing 1212, a dewar inner 1213, a multi-layered multi-insulating layer 1214, and a skirt 1215, the thermal cover 1211 is horizontally disposed at the upper end of the dewar housing 1212, the inner container 123 is installed inside the dewar housing 1212, a gap between the dewar housing 1212 and the inner container 123 is filled with the multi-layered multi-insulating layer 1214, and the dewar housing 1212 is installed on the skirt 1215.
Examples
Based on the above structural basis, as shown in fig. 1.
During operation, the rollers are placed in the working chamber 222, a low vacuum environment is constructed in the working chamber 222 through the vacuum pump 1251 and the exhaust pipe 1252, liquid nitrogen is contained in the cooling storage tank 121, the liquid nitrogen in the cooling storage tank is changed into low-temperature nitrogen through the liquid nitrogen vaporizer 123 to enter the working chamber 222, the low-temperature nitrogen is in direct contact with the rollers in the working chamber 222, the cooling speed is high, and the wall of the cooling storage tank 121 is provided with the fan to promote the flow of cold air.
The vacuumizing and temperature condition of the working chamber 222 can be seen through the display instrument 127, the adjustment is convenient, and the input quantity of liquid nitrogen is controlled through the low-temperature electromagnetic valve 133, so that the cryogenic temperature change is controlled. At this time, heat convection occurs between the cooling tank 121 and the working chamber 222, and heat radiation occurs between the working chamber 122 and the roll. And taking out the roller after the liquid nitrogen cryogenic treatment is finished.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.
In addition, the embodiments of the present invention can be arbitrarily combined with each other, and the same shall be regarded as the disclosure of the present invention as long as the idea of the present invention is not violated.
Claims (10)
1. The liquid nitrogen deep cooling device for improving the quenching depth of the roller body of the roller is characterized by comprising a box body (1), wherein the box body (1) comprises an outer box body (11), an inner box body (12) and a liquid nitrogen device (13), the inner box body (12) and the liquid nitrogen device (13) are installed inside the outer box body (11), and the liquid nitrogen device (13) is arranged on one side of the inner box body (12) and connected with each other; the inner box body (12) comprises a cooling storage tank (121) and a working chamber (122), the liquid nitrogen device (13) comprises a liquid nitrogen tank (131) and a liquid conveying pipe (132), and the liquid nitrogen tank (131) is connected with the cooling storage tank (121) through the liquid conveying pipe (132); the working chamber (122) is nested in the cooling storage tank (121), liquid nitrogen is contained in the cooling storage tank (121), a liquid nitrogen vaporizer (123) is installed between the cooling storage tank (121) and the working chamber (122), and a fan (124) is installed on the wall of the cooling storage tank (121).
2. The liquid nitrogen cryogenic device for increasing the quenching depth of the roller body of the roller according to claim 1, wherein the inner box body (12) further comprises a vacuum pumping device (125), and the vacuum pumping device (125) is connected with the working chamber (122).
3. The liquid nitrogen cryogenic device for increasing the quenching depth of the roller body of the roller according to claim 2, wherein the vacuumizing device (125) comprises a vacuum pump (1251), an exhaust pipe (1252) and a vacuum meter (1253), the vacuum pump (1251) is connected with the working chamber (122) through the exhaust pipe (1252), and the vacuum meter (1253) is installed on the exhaust pipe (1252).
4. The liquid nitrogen cryogenic device for improving the quenching depth of the roller body of the roller according to claim 3, wherein the inner box body (12) further comprises a protective shell (126), the cooling storage tank (121), the working chamber (122) and the vacuum pumping device (125) are installed in the protective shell (126), a display instrument (127) is arranged on the outer wall of the protective shell (126), the display instrument (127) comprises a vacuum display instrument (1271), and the vacuum display instrument (1271) is connected with the vacuum meter (1253).
5. The liquid nitrogen cryogenic device for increasing the quenching depth of the roller body of the roller according to claim 4, wherein the protective shell (126) is made of double-layer stainless steel.
6. The liquid nitrogen cryogenic device for increasing the quenching depth of the roller body of the roller according to claim 5, characterized in that a heat insulation material (1261) is filled between the double layers of stainless steel of the protective shell (126).
7. The liquid nitrogen cryogenic device for increasing the quenching depth of the roller body of the roller according to claim 4, characterized in that a temperature sensor (128) is arranged in the middle of the working chamber (122).
8. The liquid nitrogen cryogenic device for increasing the quenching depth of the roller body of the roller according to claim 7, wherein the display instrument (127) further comprises a temperature display instrument (1272), and the temperature display instrument (1272) is connected with the temperature sensor (128).
9. The liquid nitrogen cryogenic device for increasing the quenching depth of the roller body of the roller according to claim 1, wherein a low-temperature electromagnetic valve (133) is mounted on the liquid conveying pipe (132).
10. The liquid nitrogen cryogenic device for increasing the quenching depth of the roller body of the roller according to claim 1, wherein the cooling storage tank (121) comprises a heat preservation cover (1211), a Dewar shell (1212), a Dewar inner container (1213), a multi-layer multi-screen heat insulation layer (1214) and a skirt (1215), the heat preservation cover (1211) is horizontally arranged at the upper end of the Dewar shell (1212), the Dewar inner container (1213) is installed inside the Dewar shell (1212), gaps of the Dewar shell (1212) and the Dewar inner container (1213) are filled with the multi-layer multi-screen heat insulation layer (1214), and the Dewar shell (1212) is installed on the skirt (1215).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020052152.7U CN211570734U (en) | 2020-01-10 | 2020-01-10 | Liquid nitrogen cryogenic device for improving quenching depth of roller body |
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| CN202020052152.7U CN211570734U (en) | 2020-01-10 | 2020-01-10 | Liquid nitrogen cryogenic device for improving quenching depth of roller body |
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| CN202020052152.7U Expired - Fee Related CN211570734U (en) | 2020-01-10 | 2020-01-10 | Liquid nitrogen cryogenic device for improving quenching depth of roller body |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832328A (en) * | 2021-09-14 | 2021-12-24 | 江苏润孚机械轧辊制造有限公司 | Roller manufacturing method of lithium battery pole piece rolling mill |
| CN114350928A (en) * | 2021-12-28 | 2022-04-15 | 宝钢轧辊科技有限责任公司 | Homogenization subzero treatment method of roller and subzero treatment tank adopted by method |
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2020
- 2020-01-10 CN CN202020052152.7U patent/CN211570734U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832328A (en) * | 2021-09-14 | 2021-12-24 | 江苏润孚机械轧辊制造有限公司 | Roller manufacturing method of lithium battery pole piece rolling mill |
| CN114350928A (en) * | 2021-12-28 | 2022-04-15 | 宝钢轧辊科技有限责任公司 | Homogenization subzero treatment method of roller and subzero treatment tank adopted by method |
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