CN215404382U - Heat treatment system adopting isothermal cooling liquid - Google Patents
Heat treatment system adopting isothermal cooling liquid Download PDFInfo
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- CN215404382U CN215404382U CN202121776499.7U CN202121776499U CN215404382U CN 215404382 U CN215404382 U CN 215404382U CN 202121776499 U CN202121776499 U CN 202121776499U CN 215404382 U CN215404382 U CN 215404382U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 71
- 239000000110 cooling liquid Substances 0.000 title abstract description 9
- 230000007246 mechanism Effects 0.000 claims abstract description 89
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000005507 spraying Methods 0.000 claims abstract description 16
- 230000000670 limiting effect Effects 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 230000001681 protective effect Effects 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 239000012809 cooling fluid Substances 0.000 claims 8
- 230000000694 effects Effects 0.000 abstract description 4
- 230000000087 stabilizing effect Effects 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 15
- 239000003513 alkali Substances 0.000 description 6
- 238000005496 tempering Methods 0.000 description 6
- 229910001566 austenite Inorganic materials 0.000 description 4
- 229910000734 martensite Inorganic materials 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000011449 brick Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 238000005255 carburizing Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000003670 easy-to-clean Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The utility model discloses a heat treatment system adopting isothermal cooling liquid, which has the technical scheme that: the heat treatment furnace comprises a bottom plate, wherein the top of the bottom plate is fixedly connected with a heat treatment furnace, the inner wall of the heat treatment furnace is fixedly connected with a hollowed-out plate, a heater is arranged below the hollowed-out plate, heat treatment liquid is injected into the heat treatment furnace, and a feeding platform and a discharging platform are fixedly connected to two sides of the bottom plate respectively; the device also comprises a hoisting mechanism, a conveying mechanism, a placing mechanism, a limiting mechanism, a spraying mechanism and a guiding mechanism; the placing mechanism is arranged below the lifting mechanism and used for placing the cast iron blocks to be subjected to heat treatment; the conveying mechanism is arranged at the top of the bottom plate and used for driving the placing mechanism to move in the horizontal direction; the effects of preventing the cast iron block from distortion and cracking, effectively eliminating internal stress and stabilizing the size and shape of the cast iron block are achieved.
Description
Technical Field
The utility model belongs to the field of heat treatment, and particularly relates to a heat treatment system adopting isothermal cooling liquid.
Background
The heat treatment is a metal hot processing technology for changing the chemical components and structures on the surface or in the material to obtain the required performance by heating, heat preservation and cooling the metal material in a solid state.
Reference may be made to patent publication No. CN103528377A, which discloses a heat treatment insulation system, comprising a furnace side insulation layer, a furnace bottom insulation layer and a furnace top insulation layer, wherein the furnace side insulation layer is located inside the circumference of the heat treatment furnace, the furnace bottom insulation layer and the furnace top insulation layer are respectively located inside the furnace bottom and the furnace top and respectively correspondingly cover under and over the furnace side insulation layer, a hearth is formed between the side insulation layer, the furnace bottom insulation layer and the furnace top insulation layer, the furnace side insulation layer comprises anti-carburizing bricks located in the inner layer and ceramic fiber blankets located in the outer layer, the furnace bottom insulation layer comprises anti-carburizing bricks located in the inner layer and insulation bricks located in the outer layer, and the furnace top insulation layer is ceramic fiber blanket blocks.
The above patent has greatly reduced the temperature that heat treatment furnace distributed out, has also reduced the energy that heat treatment furnace elevating temperature consumed simultaneously, the advantage of cost is reduced, but it also has the defect, if: the internal stress of the workpiece cannot be eliminated, and the workpiece is easy to distort and crack.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a heat treatment system using an isothermal coolant to solve the above problems of the background art.
In order to achieve the purpose, the utility model provides the following technical scheme:
a heat treatment system adopting isothermal cooling liquid comprises a bottom plate, wherein the top of the bottom plate is fixedly connected with a heat treatment furnace, the inner wall of the heat treatment furnace is fixedly connected with a hollowed-out plate, a heater is arranged below the hollowed-out plate, heat treatment liquid is injected into the heat treatment furnace, and a feeding platform and a discharging platform are respectively and fixedly connected to two sides of the bottom plate; the device also comprises a hoisting mechanism, a conveying mechanism, a placing mechanism, a limiting mechanism, a spraying mechanism and a guiding mechanism;
the placing mechanism is arranged below the lifting mechanism and used for placing the cast iron blocks to be subjected to heat treatment;
the conveying mechanism is arranged at the top of the bottom plate and used for driving the placing mechanism to move in the horizontal direction;
the lifting mechanism is used for driving the placing mechanism to move in the vertical direction;
the limiting mechanism is arranged on the placing mechanism;
the guide mechanism is arranged on the conveying mechanism;
the spraying mechanism is arranged above the lifting mechanism and used for removing heat treatment liquid on the surface of the cast iron block.
Preferably, conveying mechanism includes fixed connection and is in two guided ways at bottom plate top, it is connected with the sliding block to slide on the guided way, the top fixedly connected with backup pad of sliding block, two the common fixedly connected with diaphragm in top of backup pad.
Preferably, the top installation of bottom plate is fixed with servo motor, servo motor's motor shaft fixedly connected with threaded rod, one of them the one end fixedly connected with rectangular block of sliding block, the threaded rod with rectangular block threaded connection, handling mechanism is fixed including the installation the electric block of diaphragm bottom.
Preferably, the placing mechanism comprises a placing frame for placing the cast iron blocks, the top of an inner cavity of the placing frame is fixedly connected with a plurality of rectangular strips, a U-shaped fixing plate is welded and fixed to the outer wall of the placing frame, and a chain of the electric hoist is fixedly connected with the top of the U-shaped fixing plate.
Preferably, the end parts of the openings at the two sides of the placing frame are respectively and fixedly connected with two rectangular plates, the rectangular plates are provided with rectangular grooves, two protective door plates are inserted between the rectangular grooves, and the end parts of the protective door plates are fixedly connected with sockets which facilitate the insertion of tools.
Preferably, stop gear includes fixed connection and is in two L templates at the top of U type fixed plate, two sliding connection has the sliding sleeve respectively in the backup pad, the sliding sleeve with L template fixed connection.
Preferably, the spraying mechanism comprises two spraying pipes fixedly connected to the transverse plate, the bottom of each spraying pipe is communicated and fixed with a transverse pipe, the bottom of each transverse pipe is communicated and fixed with two spray heads, the spraying mechanism further comprises a water receiving pool fixedly connected to the top of the bottom plate, and the center of the water receiving pool is fixedly connected with a rectangular platform used for bearing the placement frame.
Preferably, guiding mechanism includes sliding connection two guide blocks on the guided way, two the guide block sets up respectively the both sides of sliding block, the top fixedly connected with slope fixed plate of guide block, the one end of slope fixed plate with backup pad fixed connection.
Compared with the prior art, the utility model has the beneficial effects that:
the heat treatment system adopting the isothermal cooling liquid can effectively eliminate the internal stress of the cast iron block through the heat treatment furnace and the heat treatment liquid: the cast iron blocks have large internal stress after quenching, and the internal stress of the cast iron blocks can be eliminated through the alkali bath tempering of the isothermal alkaline heat treatment liquid; the structure of the cast iron block after quenching is generally martensite and partial retained austenite, the two structures are unstable and can spontaneously transform to change the size and the shape of the cast iron block, the martensite and the retained austenite can be promoted to transform by the alkali bath tempering of the isothermal heat treatment liquid, the structure of the cast iron block tends to be stable, and further the cast iron block is ensured not to deform any more in the using process, so that the utility model achieves the effects of preventing the cast iron block from being distorted and cracked, effectively eliminating internal stress and stabilizing the size and the shape of the cast iron block, and simultaneously, the surface of the cast iron block can be more delicate, smooth and bright by the alkali bath tempering through the heat treatment liquid and is easy to clean.
According to the heat treatment system adopting the isothermal cooling liquid, the cast iron blocks are placed by the placing frame, so that the cast iron blocks can be tempered more uniformly and stably in the heat treatment liquid, and meanwhile, a plurality of cast iron blocks can be treated at a time, and the heat treatment system has the advantage of improving the heat treatment efficiency.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a second schematic structural diagram of the present invention;
FIG. 3 is a structural cross-sectional view of the present invention;
FIG. 4 is an enlarged view of the structure of FIG. 1 at A according to the present invention;
FIG. 5 is an enlarged view of the structure of FIG. 1 at B according to the present invention;
FIG. 6 is an enlarged view of the structure of FIG. 1 at C.
In the figure: 1. a base plate; 2. a heat treatment furnace; 3. a hollowed-out plate; 4. a heater; 5. a feeding table; 6. a blanking table; 7. a hoisting mechanism; 8. a conveying mechanism; 9. a placement mechanism; 10. a limiting mechanism; 11. a spraying mechanism; 12. a guide mechanism; 13. a cast iron block; 14. a guide rail; 15. a slider; 16. a support plate; 17. a transverse plate; 18. a servo motor; 19. a threaded rod; 20. a rectangular block; 21. an electric hoist; 22. Placing the frame; 23. a rectangular strip; 24. a U-shaped fixing plate; 25. a rectangular plate; 26. a rectangular groove; 27. a protective door panel; 28. a socket; 29. an L-shaped plate; 30. a sliding sleeve; 31. a shower pipe; 32. a transverse tube; 33. a spray head; 34. a water receiving pool; 35. a rectangular table; 36. a guide block; 37. and inclining the fixing plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to FIGS. 1-6
Examples
A heat treatment system adopting isothermal cooling liquid comprises a bottom plate 1, wherein the top of the bottom plate 1 is fixedly connected with a heat treatment furnace 2, the inner wall of the heat treatment furnace 2 is fixedly connected with a hollow plate 3, a heater 4 is arranged below the hollow plate 3, the heat treatment furnace 2 is filled with the heat treatment liquid, and the two sides of the bottom plate 1 are respectively and fixedly connected with a feeding platform 5 and a discharging platform 6; the device also comprises a lifting mechanism 7, a conveying mechanism 8, a placing mechanism 9, a limiting mechanism 10, a spraying mechanism 11 and a guide mechanism 12;
the placing mechanism 9 is arranged below the lifting mechanism 7 and used for placing the cast iron blocks 13 to be subjected to heat treatment;
the conveying mechanism 8 is arranged at the top of the bottom plate 1 and used for driving the placing mechanism 9 to move in the horizontal direction;
the lifting mechanism 7 is used for driving the placing mechanism 9 to move in the vertical direction;
the limiting mechanism 10 is arranged on the placing mechanism 9;
the guide mechanism 12 is arranged on the conveying mechanism 8;
the spraying mechanism 11 is arranged above the lifting mechanism 7 and is used for removing heat treatment liquid on the surface of the cast iron block 13.
In this embodiment, preferably, the conveying mechanism 8 includes two guide rails 14 fixedly connected to the top of the bottom plate 1, the guide rails 14 are connected with sliding blocks 15 in a sliding manner, the top of each sliding block 15 is fixedly connected with a support plate 16, the tops of the two support plates 16 are fixedly connected with a transverse plate 17 together, a servo motor 18 is fixedly installed on the top of the bottom plate 1, a motor shaft of the servo motor 18 is fixedly connected with a threaded rod 19, one end of one sliding block 15 is fixedly connected with a rectangular block 20, the threaded rod 19 is in threaded connection with the rectangular block 20, and the lifting mechanism 7 includes an electric hoist 21 fixedly installed on the bottom of the transverse plate 17; when the device is used, the servo motor 18 is started to drive the threaded rod 19 to rotate, the rectangular block 20 and the sliding block 15 are further driven to move, the sliding block 15 slides on the guide rail 14, and finally the support plate 16, the transverse plate 17 and the electric hoist 21 are driven to move.
In this embodiment, preferably, the placing mechanism 9 includes a placing frame 22 for placing the cast iron block 13, the top of the inner cavity of the placing frame 22 is fixedly connected with a plurality of rectangular bars 23, the outer wall of the placing frame 22 is fixedly welded with a U-shaped fixing plate 24, and a chain of the electric hoist 21 is fixedly connected with the top of the U-shaped fixing plate 24; the end parts of the openings at the two sides of the placing frame 22 are respectively fixedly connected with two rectangular plates 25, the rectangular plates 25 are provided with rectangular grooves 26, a protective door plate 27 is inserted between the two rectangular grooves 26, and the end part of the protective door plate 27 is fixedly connected with a socket 28 which is convenient for a tool to insert; when the heat treatment device is used, the cast iron blocks 13 are placed on the rectangular strips 23, the contact area of the cast iron blocks 13 and heat treatment liquid can be increased, the heat treatment effect is improved, the protective door plates 27 are inserted into the rectangular grooves 26, and then the electric block 21 is started to drive the U-shaped fixing plates 24 to lift up and down with the placing frames 22.
In this embodiment, preferably, the limiting mechanism 10 includes two L-shaped plates 29 fixedly connected to the top of the U-shaped fixing plate 24, the two supporting plates 16 are respectively connected with a sliding sleeve 30 in a sliding manner, and the sliding sleeve 30 is fixedly connected with the L-shaped plates 29; through the setting of L template 29 and sliding sleeve 30, can prevent to place the condition that frame 22 rocked when going up and down, and then improve the stability of placing frame 22 when going up and down.
In this embodiment, preferably, the spraying mechanism 11 includes two spraying pipes 31 fixedly connected to the horizontal plate 17, the bottom of the spraying pipe 31 is fixedly communicated with a horizontal pipe 32, the bottom of the horizontal pipe 32 is fixedly communicated with two spray heads 33, the spraying mechanism 11 further includes a water receiving tank 34 fixedly connected to the top of the bottom plate 1, and a rectangular platform 35 for supporting the placing frame 22 is fixedly connected to the center of the water receiving tank 34; when the cleaning device is used, the spray pipe 31 is communicated with an external cleaning source, after the placing frame 22 and the cast iron block 13 are placed on the rectangular table 35, the external cleaning source is started, and the cast iron block 13 is sprayed and cleaned through the spray pipe 31, the transverse pipe 32 and the spray head 33.
In this embodiment, preferably, the guiding mechanism 12 includes two guiding blocks 36 slidably connected to the guiding rail 14, the two guiding blocks 36 are respectively disposed at two sides of the sliding block 15, an inclined fixing plate 37 is fixedly connected to a top of the guiding block 36, and one end of the inclined fixing plate 37 is fixedly connected to the supporting plate 16; the guide blocks 36 and the inclined fixing plate 37 are arranged to improve the running stability of the support plate 16 and prevent the support plate from rolling during movement.
The working principle and the using process of the utility model are as follows:
this heat treatment system that adopts isothermal coolant liquid through heat treatment furnace 2 and heat treatment liquid, can effectively eliminate the internal stress of cast iron piece 13: the cast iron block 13 has large internal stress after quenching, and the internal stress of the cast iron block 13 can be eliminated through the alkali bath tempering of the isothermal alkaline heat treatment liquid; the structure of the cast iron block 13 after quenching is generally martensite and partial retained austenite, the two structures are unstable and can spontaneously transform, so that the size and the shape of the cast iron block 13 are changed, the martensite and the retained austenite can be promoted to transform through the alkali bath tempering of the isothermal heat treatment liquid, the structure of the cast iron block 13 tends to be stable, and further the cast iron block 13 is ensured not to deform any more in the using process, so that the utility model achieves the effects of preventing the cast iron block 13 from being distorted and cracked, effectively eliminating internal stress and stabilizing the size and the shape of the cast iron block 13, and simultaneously, the surface of the cast iron block 13 can be more delicate, smooth and bright through the alkali bath tempering of the heat treatment liquid, and is easy to clean.
According to the heat treatment system adopting the isothermal cooling liquid, the cast iron blocks 13 are placed by the placing frame 22, so that the cast iron blocks 13 can be tempered more uniformly and stably in the heat treatment liquid, and meanwhile, a plurality of blocks can be treated at a time, and the heat treatment system has the advantage of improving the heat treatment efficiency.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A heat treatment system using an isothermal cooling fluid, comprising: the heat treatment device comprises a bottom plate (1), wherein the top of the bottom plate (1) is fixedly connected with a heat treatment furnace (2), the inner wall of the heat treatment furnace (2) is fixedly connected with a hollow plate (3), a heater (4) is arranged below the hollow plate (3), heat treatment liquid is injected into the heat treatment furnace (2), and the two sides of the bottom plate (1) are respectively and fixedly connected with a feeding platform (5) and a discharging platform (6); the device also comprises a lifting mechanism (7), a conveying mechanism (8), a placing mechanism (9), a limiting mechanism (10), a spraying mechanism (11) and a guide mechanism (12);
the placing mechanism (9) is arranged below the lifting mechanism (7) and is used for placing cast iron blocks (13) to be subjected to heat treatment;
the conveying mechanism (8) is arranged at the top of the bottom plate (1) and used for driving the placing mechanism (9) to move in the horizontal direction;
the lifting mechanism (7) is used for driving the placing mechanism (9) to move in the vertical direction;
the limiting mechanism (10) is arranged on the placing mechanism (9);
the guide mechanism (12) is arranged on the conveying mechanism (8);
the spraying mechanism (11) is arranged above the lifting mechanism (7) and is used for removing heat treatment liquid on the surface of the cast iron block (13).
2. The heat treatment system using isothermal cooling fluid according to claim 1, wherein: conveying mechanism (8) are including fixed connection two guided way (14) at bottom plate (1) top, it is connected with sliding block (15) to slide on guided way (14), the top fixedly connected with backup pad (16) of sliding block (15), two the common fixedly connected with diaphragm (17) in top of backup pad (16).
3. The heat treatment system using isothermal cooling fluid according to claim 2, wherein: the top installation of bottom plate (1) is fixed with servo motor (18), the motor shaft fixedly connected with threaded rod (19) of servo motor (18), one of them the one end fixedly connected with rectangular block (20) of sliding block (15), threaded rod (19) with rectangular block (20) threaded connection, handling mechanism (7) are fixed including the installation electric block (21) of diaphragm (17) bottom.
4. The heat treatment system using isothermal cooling fluid according to claim 3, wherein: the placing mechanism (9) comprises a placing frame (22) used for placing the cast iron blocks (13), a plurality of rectangular strips (23) are fixedly connected to the top of the inner cavity of the placing frame (22), a U-shaped fixing plate (24) is fixedly welded to the outer wall of the placing frame (22), and a chain of the electric hoist (21) is fixedly connected with the top of the U-shaped fixing plate (24).
5. The heat treatment system using isothermal cooling fluid according to claim 4, wherein: the end parts of the openings at the two sides of the placing frame (22) are respectively fixedly connected with two rectangular plates (25), the rectangular plates (25) are provided with rectangular grooves (26), two protective door plates (27) are inserted between the rectangular grooves (26), and the end parts of the protective door plates (27) are fixedly connected with sockets (28) which facilitate the insertion of tools.
6. The heat treatment system using isothermal cooling fluid according to claim 4, wherein: stop gear (10) are including fixed connection two L template (29) at the top of U type fixed plate (24), two there are sliding sleeve (30) on backup pad (16) respectively sliding connection, sliding sleeve (30) with L template (29) fixed connection.
7. The heat treatment system using isothermal cooling fluid according to claim 4, wherein: spray mechanism (11) including fixed connection two shower (31) on diaphragm (17), the bottom intercommunication of shower (31) is fixed with violently pipe (32), the bottom intercommunication of violently pipe (32) is fixed with two shower nozzles (33), spray mechanism (11) still include fixed connection in water receiving pond (34) at bottom plate (1) top, the center department fixedly connected with of water receiving pond (34) is used for the bearing place rectangle platform (35) of frame (22).
8. The heat treatment system using isothermal cooling fluid according to claim 2, wherein: guiding mechanism (12) are including sliding connection two guide block (36) on guided way (14), two guide block (36) set up respectively the both sides of sliding block (15), the top fixedly connected with slope fixed plate (37) of guide block (36), the one end of slope fixed plate (37) with backup pad (16) fixed connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121776499.7U CN215404382U (en) | 2021-08-02 | 2021-08-02 | Heat treatment system adopting isothermal cooling liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121776499.7U CN215404382U (en) | 2021-08-02 | 2021-08-02 | Heat treatment system adopting isothermal cooling liquid |
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| CN215404382U true CN215404382U (en) | 2022-01-04 |
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| CN202121776499.7U Expired - Fee Related CN215404382U (en) | 2021-08-02 | 2021-08-02 | Heat treatment system adopting isothermal cooling liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113604645A (en) * | 2021-08-02 | 2021-11-05 | 水野金属科技(无锡)有限公司 | Heat treatment system and process adopting isothermal cooling liquid |
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2021
- 2021-08-02 CN CN202121776499.7U patent/CN215404382U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113604645A (en) * | 2021-08-02 | 2021-11-05 | 水野金属科技(无锡)有限公司 | Heat treatment system and process adopting isothermal cooling liquid |
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Granted publication date: 20220104 |