CN215657106U - High-efficient cooling device of cold-drawn shaped steel - Google Patents
High-efficient cooling device of cold-drawn shaped steel Download PDFInfo
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- CN215657106U CN215657106U CN202121999022.5U CN202121999022U CN215657106U CN 215657106 U CN215657106 U CN 215657106U CN 202121999022 U CN202121999022 U CN 202121999022U CN 215657106 U CN215657106 U CN 215657106U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 63
- 239000010959 steel Substances 0.000 title claims abstract description 63
- 238000001816 cooling Methods 0.000 title claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 144
- 238000005096 rolling process Methods 0.000 claims description 15
- 239000007921 spray Substances 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims 2
- 238000003466 welding Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 7
- 239000003507 refrigerant Substances 0.000 description 27
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 206010066054 Dysmorphism Diseases 0.000 description 2
- 238000010622 cold drawing Methods 0.000 description 2
- 230000003434 inspiratory effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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Abstract
The utility model discloses a high-efficiency cooling device for cold-drawn section steel, which belongs to the field of cooling devices and comprises a main body, wherein the main body comprises a baffle, the outer surface of the lower end of the baffle is fixedly connected with a support frame, the middle part of the baffle is fixedly connected with a placing plate, the outer surface of the upper end of the baffle is detachably connected with a water tank, the outer surface of the lower end of the support frame is fixedly connected with a water collecting tank, the inner surfaces of the two ends of the placing plate are fixedly connected with springs, the outer surface of one end of each spring is fixedly connected with an L-shaped plate, the outer surface of the upper end of the water tank is provided with a water filling port, the upper end of the water tank is detachably connected with a refrigerator, and the outer surface of one side of the refrigerator is detachably connected with a controller and a connecting wire. The cooling effect is strong, and the cold-drawn section steel can be cooled in all directions, so that the cooling efficiency of the cold-drawn section steel is improved; this setting can be cooled off according to the length of cold-drawn shaped steel to have the removal function, and stability is stronger.
Description
Technical Field
The utility model belongs to the field of cooling devices, and particularly relates to a high-efficiency cooling device for cold-drawn section steel.
Background
The cold-drawn steel is made by cold-drawing processing and has various cross-sectional shapes and sizes, the cold-drawn steel is also called cold-drawn steel and cold-drawn steel, the cold-drawn steel can be matched with the automobile industry, the hardware tool industry, the machining manufacturing industry and textile machinery processing factories, and the cold-drawn steel is widely applied to machine tool manufacturing, hydroelectric equipment manufacturing, woodworking machinery manufacturing and automobile and motorcycle accessories, however, the cold-drawn steel high-efficiency cooling device on the market still has various defects and can not meet the production requirement.
The cooling effect of the existing high-efficiency cooling device for cold-drawn section steel is poor, and the cooling device cannot carry out all-dimensional cooling, so that the cooling efficiency of the cold-drawn section steel is reduced, secondly, the high-efficiency cooling device for cold-drawn section steel cannot carry out cooling according to the length of the cold-drawn section steel, does not have a moving function, is poor in stability, and provides the high-efficiency cooling device for cold-drawn section steel.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an efficient cooling device for cold-drawn section steel, and aims to solve the problems that the efficient cooling device for cold-drawn section steel in the background technology is strong in cooling effect, low in limitation and capable of moving.
In order to achieve the purpose, the utility model provides the following technical scheme: a high-efficiency cooling device for cold-drawn steel comprises a baffle, wherein a support frame is fixedly connected to the outer surface of the lower end of the baffle, a placing plate is fixedly connected to the middle of the baffle, a water tank is detachably connected to the outer surface of the upper end of the baffle, a water collecting tank is fixedly connected to the outer surface of the lower end of the support frame, springs are fixedly connected to the inner surfaces of two ends of the placing plate, an L-shaped plate is fixedly connected to the outer surface of one end of each spring, a water filling port is formed in the outer surface of the upper end of the water tank, a refrigerator is detachably connected to the upper end of the water tank, a controller and a connecting wire are detachably connected to the outer surface of one side of the refrigerator, a plug is detachably connected to the outer surface of one end of the connecting wire, a rotary spray head is detachably connected to the outer surface of the lower end of the water tank, a fixing frame is fixedly connected to the outer surface of the upper end of the water collecting tank, a push rod is fixedly connected to the outer surface of one side of the water collecting tank, the front end surface of water catch bowl can be dismantled and be connected with the outlet, the lower extreme surface of water catch bowl can be dismantled and be connected with the roll subassembly.
Preferably, place and be provided with connecting hole and fixed fixture block between board and the spring, the both ends internal surface of placing the board passes through the one end external surface fixed connection of connecting hole and fixed fixture block and spring, be provided with fixed orifices and special-shaped fixture block between spring and the L template, the other end surface of spring passes through the one side external surface fixed connection of fixed orifices and special-shaped fixture block and L template, through placing steel on placing the board, less steel can directly place on placing the board, and longer steel passes through the L template chucking, and steel is fixed to the drawing force and the elasticity of rethread spring to the steel cooling of being convenient for, and application scope is extensive.
Preferably, the water filling port is seted up at the upper end surface of water tank through mechanical equipment, the inside of water tank is provided with the water pump, through installing the water tank on the baffle, fills water with the water tank through the water filling port, opens its inside water pump, and the water pump operation back, under the effect of the high-speed rotatory centrifugal force that produces of impeller, water in the impeller runner is got rid of around to, impresses the spiral case, and the impeller entry forms the vacuum then inspiratory water is thrown away again by the impeller and gets into rotatory nozzle through the spiral case, is convenient for cool off steel.
Preferably, the refrigerator is electrically connected with the controller and the connecting wire, the connecting wire is electrically connected with the plug, the fan, the evaporator, the condenser, the compressor and the heat exchanger are arranged in the refrigerator, the power supply is connected with the connecting wire through the plug, the controller starts the refrigerator, the compressor in the refrigerator is started, the compressor sucks low-temperature and low-pressure refrigerant vapor in the evaporator to compress, the refrigerant liquefies after the temperature in the compressor is lower than the critical point of the refrigerant and reaches the required pressure, the refrigerant releases a large amount of heat after liquefaction, the heat is dissipated to the air through the heat dissipation pipe, the temperature is reduced after the liquefied refrigerant dissipates heat, the refrigerant enters the evaporator through the buffer and then through the capillary vessel, the refrigerant evaporates in the evaporator to absorb a large amount of heat, and the temperature around the evaporator is rapidly reduced, therefore, cold air is sprayed into the water tank to refrigerate water in the water tank, and steel is cooled through the rotary spray head.
Preferably, be provided with thread fixing ring between water tank and the rotatory nozzle, the lower extreme surface of water tank can be dismantled through thread fixing ring and rotatory nozzle's one end surface and be connected, and rotatory nozzle is convenient for carry out all-round cooling to steel, improves cooling efficiency.
Preferably, the upper end surface of water catch bowl and the one end surface welded connection of mount, one side surface of water catch bowl and the one end surface welded connection of push rod, rotatory nozzle spun water gets into in the water catch bowl, and the outlet can be discharged water to the mount can be fixed the baffle, avoids it to rock.
Preferably, be provided with connecting hole and cutting ferrule between water catch bowl and the outlet, the front end surface of water catch bowl can be dismantled through the one end surface of connecting hole and cutting ferrule and outlet and be connected, it ties to be provided with mounting panel and fastening between water catch bowl and the rolling subassembly, the lower extreme surface of water catch bowl is tied through mounting panel and fastening and can be dismantled with the upper end surface of rolling subassembly and be connected, the rolling subassembly includes splint, gyro wheel and connecting rod, and push rod accessible rolling subassembly removes overall structure, and the person of facilitating the use uses.
Compared with the prior art, the utility model has the beneficial effects that:
1. the water tank is arranged on the baffle plate, the water tank is filled with water through the water filling port, the water pump in the water tank is started, after the water pump runs, water in an impeller flow channel is thrown to the periphery under the action of centrifugal force generated by high-speed rotation of the impeller, the water is pressed into the volute, the impeller inlet forms vacuum, then sucked water is thrown out through the volute by the impeller and enters the rotary spray head, before the water tank is filled with water, a power supply is connected with a connecting wire through a plug, the controller starts the refrigerator, the compressor in the refrigerator is started, the compressor sucks low-temperature refrigerant steam in the evaporator, low-pressure refrigerant steam is compressed, as the temperature in the compressor is lower than the critical point of the refrigerant and reaches the required pressure, the refrigerant releases a large amount of heat after liquefaction, the heat is dissipated into the air through the heat dissipation pipe, and after the liquefied refrigerant dissipates heat, the temperature reduces, and in buffer rethread capillary entered into the evaporimeter, the refrigerant evaporates in the evaporimeter and absorbs a large amount of heat, with the rapid reduction of temperature around the evaporimeter to spray into water tank with air conditioning inside, with its inside water refrigeration, rethread rotatory nozzle cools off steel, and this sets up the cooling effect stronger, can all-round cooling, thereby has improved the cooling efficiency of cold-drawn shaped steel.
2. Through placing steel on placing the board, less steel can directly be placed on placing the board, and longer steel passes through L template chucking, the tensile force and the elasticity of rethread spring are fixed with steel, thereby the steel cooling of being convenient for, and application scope is extensive, rotatory nozzle spun water gets into in the water catch bowl, the outlet can be discharged with water, and the mount can be fixed with the baffle, avoid it to rock, and push rod accessible roll subassembly removes overall structure, the person of facilitating the use uses, this setting can be cooled off according to the length of cold-drawn shaped steel, and has the removal function, and stability is stronger.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the placement plate of FIG. 1 according to the present invention;
FIG. 3 is a schematic view of the structure of the water tank of FIG. 1 according to the present invention;
FIG. 4 is a schematic view of the structure of the water collection tank of the present invention and 1;
fig. 5 is an enlarged schematic view of the structure at a in fig. 3 according to the present invention.
In the figure: 1. a baffle plate; 2. a support frame; 3. placing the plate; 4. a water tank; 5. a water collection tank; 6. a spring; 7. an L-shaped plate; 8. a water injection port; 9. a refrigerator; 10. a controller; 11. connecting a lead; 12. a plug; 13. rotating the spray head; 14. a fixed mount; 15. a push rod; 16. a water outlet; 17. and (6) rolling the assembly.
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.
Referring to fig. 1-5, the present invention provides a technical solution: a high-efficiency cooling device for cold-drawn steel comprises a baffle plate 1, wherein the outer surface of the lower end of the baffle plate 1 is fixedly connected with a support frame 2, the middle part of the baffle plate 1 is fixedly connected with a placing plate 3, the outer surface of the upper end of the baffle plate 1 is detachably connected with a water tank 4, the outer surface of the lower end of the support frame 2 is fixedly connected with a water collecting tank 5, the inner surfaces of the two ends of the placing plate 3 are fixedly connected with springs 6, the outer surface of one end of each spring 6 is fixedly connected with an L-shaped plate 7, the outer surface of the upper end of the water tank 4 is provided with a water filling port 8, the upper end of the water tank 4 is detachably connected with a refrigerator 9, the outer surface of one side of the refrigerator 9 is detachably connected with a controller 10 and a connecting wire 11, the outer surface of one end of the connecting wire 11 is detachably connected with a plug 12, the outer surface of the lower end of the water tank 4 is detachably connected with a rotary spray head 13, the outer surface of the upper end of the water collecting tank 5 is fixedly connected with a fixing frame 14, the outer surface of one side of the water collecting tank 5 is fixedly connected with a push rod 15, the outer surface of the front end of the water collecting tank 5 is detachably connected with a water outlet 16, and the outer surface of the lower end of the water collecting tank 5 is detachably connected with a rolling component 17.
In the embodiment, the water tank 4 is arranged on the baffle plate 1, the water tank 4 is filled with water through the water filling port 8, the water pump in the water tank is started, after the water pump runs, the water in the impeller flow channel is thrown to the periphery under the action of centrifugal force generated by high-speed rotation of the impeller, the water is pressed into the volute, the inlet of the impeller forms vacuum, the sucked water is thrown out of the volute by the impeller and enters the rotary spray head 13, before the water tank 4 is filled with water, the power supply is connected with the connecting lead 11 through the plug 12, the controller 10 starts the refrigerator 9, the compressor in the refrigerator 9 is started, the compressor sucks the low temperature in the evaporator, the refrigerant steam is compressed, the refrigerant is liquefied after the temperature in the compressor is lower than the critical point of the refrigerant and reaches the required pressure, the refrigerant releases a large amount of heat after being liquefied, and the heat is radiated into the air through the radiating pipe, after the liquefied refrigerant dissipates heat, the temperature is reduced, the refrigerant enters the evaporator through the buffer and the capillary tube, the refrigerant evaporates in the evaporator to absorb a large amount of heat, the temperature around the evaporator is rapidly reduced, cold air is sprayed into the water tank 4 to refrigerate water in the water tank, and steel is cooled through the rotary spray head 13, so that the cooling effect is strong, the steel can be cooled in all directions, and the cooling efficiency of cold-drawn steel is improved; through placing steel on placing board 3, less steel can directly be placed on placing board 3, and longer steel passes through L template 7 chucking, rethread spring 6's tensile force and elasticity are fixed with steel, thereby be convenient for the steel cooling, and application scope is extensive, rotatory nozzle 13 spun water gets into in the water catch bowl 5, 16 discharge ports can discharge water, and mount 14 can be fixed baffle 1, avoid it to rock, and push rod 15 accessible rolling assembly 17 removes overall structure, the person of facilitating the use uses, this setting can be cooled off according to the length of cold drawing shaped steel, and have the removal function, and stability is stronger.
Specifically, place and be provided with connecting hole and fixed fixture block between board 3 and the spring 6, place the both ends internal surface of board 3 and pass through the connecting hole and fixed fixture block and be connected with the one end external surface fixed of spring 6, be provided with fixed orifices and dysmorphism fixture block between spring 6 and the L template 7, the other end external surface of spring 6 passes through fixed orifices and dysmorphism fixture block and is connected with one side external surface fixed of L template 7.
In this embodiment, through placing steel on placing board 3, less steel can directly be placed on placing board 3, and longer steel passes through L template 7 chucking, and the extension force and the elasticity of rethread spring 6 are fixed steel to the steel cooling of being convenient for, and application scope is extensive.
Specifically, the water filling port 8 is provided on the outer surface of the upper end of the water tank 4 through mechanical equipment, and the water pump is provided inside the water tank 4.
In this embodiment, through installing water tank 4 on baffle 1, fill water with water tank 4 through water filling port 8, open its inside water pump, the water pump operation back, under the effect of the centrifugal force that the impeller is high-speed rotatory and produce, water in the impeller runner is got rid of around, impresses the spiral case, and the impeller entry forms the vacuum then inspiratory water is thrown away again by the impeller and gets into rotatory nozzle 13 in through the spiral case, is convenient for cool off the steel.
Specifically, the refrigerator 9 is electrically connected to the controller 10 and the connecting wire 11, the connecting wire 11 is electrically connected to the plug 12, and the fan, the evaporator, the condenser, the compressor, and the heat exchanger are disposed inside the refrigerator 9.
In this embodiment, a power supply is connected to a connection wire 11 through a plug 12, a controller 10 starts a refrigerator 9, a compressor inside the refrigerator 9 is started, the compressor sucks low-temperature and low-pressure refrigerant vapor in an evaporator to compress, the refrigerant is liquefied after the temperature in the compressor is lower than the critical point of the refrigerant and reaches a required pressure, the refrigerant releases a large amount of heat after being liquefied, the heat is dissipated to the air through a heat dissipation pipe, the temperature of the liquefied refrigerant is reduced after being dissipated, the liquefied refrigerant enters the evaporator through a buffer and a capillary tube, the refrigerant evaporates in the evaporator to absorb a large amount of heat, the temperature around the evaporator is rapidly reduced, and therefore cold air is sprayed into a water tank 4 to refrigerate water inside the water, and steel is cooled through a rotary spray head 13.
Specifically, a thread fixing ring is arranged between the water tank 4 and the rotary spray head 13, and the outer surface of the lower end of the water tank 4 is detachably connected with the outer surface of one end of the rotary spray head 13 through the thread fixing ring.
In this embodiment, the rotary nozzle 13 facilitates the all-round cooling of the steel, and improves the cooling efficiency.
Specifically, the outer surface of the upper end of the water collecting tank 5 is welded to the outer surface of one end of the fixing frame 14, and the outer surface of one side of the water collecting tank 5 is welded to the outer surface of one end of the push rod 15.
In this embodiment, the water sprayed from the rotary nozzle 13 enters the water collecting tank 5, the water outlet 16 discharges the water, and the fixing frame 14 fixes the baffle 1 to prevent the baffle from shaking.
Specifically, be provided with connecting hole and cutting ferrule between water catch bowl 5 and the outlet 16, the front end surface of water catch bowl 5 can be dismantled through the one end surface of connecting hole and cutting ferrule and outlet 16 and be connected, is provided with mounting panel and fastening bolt between water catch bowl 5 and the rolling component 17, and the lower extreme surface of water catch bowl 5 can be dismantled through mounting panel and fastening bolt and rolling component 17's upper end surface and be connected, and rolling component 17 includes splint, gyro wheel and connecting rod.
In this embodiment, the push rod 15 can move the whole structure through the rolling assembly 17, which is convenient for the user to use.
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 (7)
1. The utility model provides a high-efficient cooling device of cold-drawn shaped steel, includes baffle (1), its characterized in that: the water tank is characterized in that a support frame (2) is fixedly connected to the outer surface of the lower end of the baffle plate (1), a placing plate (3) is fixedly connected to the middle of the baffle plate (1), a water tank (4) is detachably connected to the outer surface of the upper end of the baffle plate (1), a water collecting tank (5) is fixedly connected to the outer surface of the lower end of the support frame (2), springs (6) are fixedly connected to the inner surfaces of the two ends of the placing plate (3), an L-shaped plate (7) is fixedly connected to the outer surface of one end of each spring (6), a water filling port (8) is formed in the outer surface of the upper end of the water tank (4), a refrigerator (9) is detachably connected to the upper end of the water tank (4), a controller (10) and a connecting wire (11) are detachably connected to the outer surface of one side of the refrigerator (9), a plug (12) is detachably connected to the outer surface of one end of the connecting wire (11), and a rotary spray head (13) is detachably connected to the outer surface of the lower end of the water tank (4), the outer fixed surface of the upper end of the water collecting tank (5) is connected with a fixing frame (14), the outer fixed surface of one side of the water collecting tank (5) is connected with a push rod (15), the outer surface of the front end of the water collecting tank (5) is detachably connected with a water outlet (16), and the outer surface of the lower end of the water collecting tank (5) is detachably connected with a rolling assembly (17).
2. The efficient cooling apparatus for cold-drawn steel sections according to claim 1, wherein: the spring type plate placing device is characterized in that a connecting hole and a fixing clamping block are arranged between the placing plate (3) and the spring (6), inner surfaces of two ends of the placing plate (3) are fixedly connected with the outer surface of one end of the spring (6) through the connecting hole and the fixing clamping block, a fixing hole and a special-shaped clamping block are arranged between the spring (6) and the L-shaped plate (7), and the outer surface of the other end of the spring (6) is fixedly connected with the outer surface of one side of the L-shaped plate (7) through the fixing hole and the special-shaped clamping block.
3. The efficient cooling apparatus for cold-drawn steel sections according to claim 1, wherein: water filling port (8) are seted up at the upper end surface of water tank (4) through mechanical equipment, the inside of water tank (4) is provided with the water pump.
4. The efficient cooling apparatus for cold-drawn steel sections according to claim 1, wherein: the refrigerator (9) is electrically connected with the controller (10) and the connecting lead (11), the connecting lead (11) is electrically connected with the plug (12), and the fan, the evaporator, the condenser, the compressor and the heat exchanger are arranged in the refrigerator (9).
5. The efficient cooling apparatus for cold-drawn steel sections according to claim 1, wherein: be provided with the solid fixed ring of screw thread between water tank (4) and rotatory nozzle (13), the lower extreme surface of water tank (4) can be dismantled with the one end surface of rotatory nozzle (13) through the solid fixed ring of screw thread and be connected.
6. The efficient cooling apparatus for cold-drawn steel sections according to claim 1, wherein: the outer surface of the upper end of the water collecting tank (5) is connected with the outer surface of one end of the fixing frame (14) in a welding mode, and the outer surface of one side of the water collecting tank (5) is connected with the outer surface of one end of the push rod (15) in a welding mode.
7. The efficient cooling apparatus for cold-drawn steel sections according to claim 1, wherein: be provided with connecting hole and cutting ferrule between water catch bowl (5) and outlet (16), the front end surface of water catch bowl (5) can be dismantled through the one end surface of connecting hole and cutting ferrule and outlet (16) and be connected, be provided with mounting panel and fastening bolt between water catch bowl (5) and rolling subassembly (17), the lower extreme surface of water catch bowl (5) can be dismantled through the upper end surface of mounting panel and fastening bolt and rolling subassembly (17) and be connected, rolling subassembly (17) include splint, gyro wheel and connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121999022.5U CN215657106U (en) | 2021-08-24 | 2021-08-24 | High-efficient cooling device of cold-drawn shaped steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121999022.5U CN215657106U (en) | 2021-08-24 | 2021-08-24 | High-efficient cooling device of cold-drawn shaped steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215657106U true CN215657106U (en) | 2022-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121999022.5U Active CN215657106U (en) | 2021-08-24 | 2021-08-24 | High-efficient cooling device of cold-drawn shaped steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215657106U (en) |
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2021
- 2021-08-24 CN CN202121999022.5U patent/CN215657106U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240409 Address after: 730000, 103, No. 63 Zhonglin Road, Chengguan District, Lanzhou City, Gansu Province Patentee after: Xu Bing Country or region after: China Address before: 311222 Jingjiang Ma Station, Jingjiang street, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU HUAEN COLD DRAWING STEEL Co.,Ltd. Country or region before: China |
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| TR01 | Transfer of patent right |