CN221505307U - LNG cold energy recovery type low-pressure circulation system - Google Patents
LNG cold energy recovery type low-pressure circulation system Download PDFInfo
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- CN221505307U CN221505307U CN202323626484.4U CN202323626484U CN221505307U CN 221505307 U CN221505307 U CN 221505307U CN 202323626484 U CN202323626484 U CN 202323626484U CN 221505307 U CN221505307 U CN 221505307U
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- 238000011084 recovery Methods 0.000 title claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 60
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 56
- 239000011737 fluorine Substances 0.000 claims abstract description 56
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000005507 spraying Methods 0.000 claims abstract description 17
- 239000003507 refrigerant Substances 0.000 abstract description 23
- 238000005057 refrigeration Methods 0.000 abstract description 15
- 238000001704 evaporation Methods 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 230000008020 evaporation Effects 0.000 abstract description 3
- 239000003949 liquefied natural gas Substances 0.000 description 52
- 239000007789 gas Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 239000002918 waste heat Substances 0.000 description 8
- 230000005494 condensation Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model relates to an LNG cold energy recovery type low-pressure circulation system which comprises an equipment support, a low-pressure circulation barrel, a spraying device, a first fluorine pump, an LNG heat exchanger, a second fluorine pump, a direct cooling ice cube machine evaporator and a pipeline system. According to the LNG cold energy recovery type low-pressure circulation system, a compressor and a refrigerating system are not required to be arranged, the first fluorine pump conveys R22 refrigerant of-20 degrees into the LNG heat exchanger and LNG liquid in the LNG heat exchanger to exchange heat, the temperature is reduced to-60 degrees, then the LNG cold energy recovery type low-pressure circulation system is sprayed on the top end of the inside of the low-pressure circulation barrel through the spraying device, meanwhile, the second fluorine pump conveys R22 refrigerant of-20 degrees into the evaporator of the direct-cooling ice cube machine, gas is formed after evaporation and heat absorption are carried out through the evaporator, the refrigerant returns to the low-pressure circulation barrel and the LNG cooled liquid to exchange heat, and the refrigerant after heat exchange returns to the first fluorine pump and the second fluorine pump respectively, so that LNG cold energy recovery refrigeration is realized, the LNG cold energy recovery type low-pressure circulation system is small in equipment size, small in occupied area and low in use cost.
Description
Technical Field
The utility model relates to the technical field of natural gas, in particular to an LNG cold energy recovery type low-pressure circulation system.
Background
The energy utilization efficiency is generally low at the present stage, most of useful energy can be directly discharged as waste, and the waste is not reasonably and effectively utilized. For example, cold energy released by LNG (liquefied natural gas) gasification processes is directly carried away by seawater or air, resulting in a white loss of cold energy. As another example, the waste heat of the gas engine in the gas heat pump refrigerator is usually directly discharged to the outdoor environment through the radiator, resulting in low energy utilization efficiency of the whole unit.
The existing LNG-based cold energy recovery technology is mainly realized through an LNG refrigerating system, and as disclosed in the patent with the application number of CN202011423648.1, the LNG-based refrigerating system comprises a gas power generation unit, an LNG heat exchange unit, an electric refrigerating unit and a waste heat recovery refrigerating unit; the LNG heat exchange unit is provided with the refrigeration unit and the waste heat recovery refrigeration unit through the cold energy transmission of the circulating medium, the condensation inlet temperature of the condenser in the electric refrigeration unit and the condensation inlet temperature of the condenser in the waste heat recovery refrigeration unit are reduced, so that the condensation effect of the condenser in the electric refrigeration unit and the condenser in the waste heat recovery refrigeration unit is improved, the refrigeration capacity of the condenser and the condensation effect of the condenser in the waste heat recovery refrigeration unit are improved, the recovery of LNG carried cold energy is realized, and the utilization rate of LNG is improved. Meanwhile, the coupling of gas power generation refrigeration and waste heat recovery refrigeration is realized by recycling high-temperature flue gas and high Wen Gangtao water formed by the gas power generation unit through the waste heat recovery refrigeration unit, the maximization of system cold output is realized, and the utilization rate of LNG is further improved. However, the refrigeration system of the existing LNG cold energy recovery technology needs to use a plurality of devices, is complex in structure, large in occupied area and high in use cost. In view of this, we propose a LNG cold energy recovery type low pressure circulation system.
Disclosure of utility model
The utility model aims to overcome the defects of the prior art, adapt to the actual needs, and provide an LNG cold energy recovery type low-pressure circulation system so as to solve the technical problems of complex structure, large occupied area and high use cost of the traditional LNG cold energy recovery technology.
In order to achieve the purpose of the utility model, the technical scheme adopted by the utility model is as follows:
An LNG cold energy recovery type low-pressure circulation system comprises an equipment support, a low-pressure circulation barrel, a spraying device, a first fluorine pump, an LNG heat exchanger, a second fluorine pump, a direct-cooling ice cube evaporator and a pipeline system; the low-pressure circulation barrel is arranged at the top of the equipment bracket; the spraying device is arranged at the top end of the inside of the low-pressure circulating barrel; the first fluorine pump is arranged on the equipment support, a liquid inlet of the first fluorine pump is communicated with a first liquid outlet of the low-pressure circulating barrel through a pipeline system, a liquid outlet of the first fluorine pump is communicated with a liquid inlet of the LNG heat exchanger through a pipeline system, and a liquid outlet of the LNG heat exchanger is communicated with an inlet of the spraying device through a pipeline system; the second fluorine pump is installed on the equipment support, and the liquid inlet of the second fluorine pump is communicated with the second liquid outlet of the low-pressure circulation barrel through a pipeline system, the liquid outlet of the second fluorine pump is communicated with the liquid inlet of the direct-cooling ice cube machine evaporator through a pipeline system, and the air outlet of the direct-cooling ice cube machine evaporator is communicated with the air inlet at the top of the low-pressure circulation barrel through a pipeline system.
According to the LNG cold energy recovery type low-pressure circulation system, a compressor and a refrigerating system are not required to be arranged, the first fluorine pump conveys the R22 refrigerant of-20 degrees into the LNG heat exchanger and LNG liquid in the LNG heat exchanger to exchange heat, the temperature is reduced to-60 degrees, then the LNG cold energy recovery type low-pressure circulation system is sprayed on the top end of the inside of the low-pressure circulation barrel through the spraying device, meanwhile, the second fluorine pump conveys the R22 refrigerant of-20 degrees into the evaporator of the direct-cooling ice cube machine, gas is formed after evaporation and heat absorption are carried out through the evaporator, the refrigerant returns to the low-pressure circulation barrel and the LNG cooled liquid to exchange heat, the refrigerant after heat exchange respectively returns to the first fluorine pump and the second fluorine pump, LNG cold energy recovery refrigeration is achieved, the equipment is small in size, the occupied area of the equipment cost is small compared with that of a traditional LNG refrigerating system.
Preferably, the piping system includes a first return pipe, a first connection pipe, a second return pipe, a third connection pipe, and a fourth connection pipe; one port of the first return pipe is communicated with a first liquid outlet of the low-pressure circulation barrel, and the other port of the first return pipe is communicated with a liquid inlet of the first fluorine pump; one port of the first connecting pipe is communicated with the liquid outlet of the first fluorine pump, and the other port of the first connecting pipe is communicated with the liquid inlet of the LNG heat exchanger; one port of the second connecting pipe is communicated with the inlet of the spraying device, and the other port of the second connecting pipe is communicated with the liquid outlet of the LNG heat exchanger; one port of the second return pipe is communicated with a second liquid outlet of the low-pressure circulation barrel, and the other port of the second return pipe is communicated with a liquid inlet of the second fluorine pump; one port of the third connecting pipe is communicated with a liquid outlet of the second fluorine pump, and the other port of the third connecting pipe is communicated with a liquid inlet of the direct-cooling ice cube evaporator; one port of the fourth connecting pipe is communicated with the air outlet of the direct-cooling ice cube machine evaporator, and the other port of the fourth connecting pipe is communicated with the air inlet at the top of the low-pressure circulation barrel.
Preferably, the valve system further comprises a valve system comprising a first valve, a second valve, a third valve, a fourth valve, a fifth valve and a sixth valve; the first valve is assembled on the first return pipe; the second valve is assembled on the first connecting pipe; the third valve is assembled on the second connecting pipe; the fourth valve is assembled on the second return pipe; the fifth valve is assembled on the third connecting pipe; the sixth valve is assembled on the fourth connecting pipe.
Preferably, the filter further comprises a first filter and a second filter; the first filter is assembled on the first return pipe; the second filter is assembled on the second return pipe; and then the refrigerant recovered from the low-pressure circulation barrel can be filtered, and the obtained high-purity refrigerant is recovered into the first fluorine pump and the second fluorine pump for secondary use, so that the energy is saved.
Preferably, the low-pressure circulation tank further comprises a tank pump liquid level device, and the tank pump liquid level device is arranged outside the low-pressure circulation tank.
Compared with the prior art, the utility model has the beneficial effects that:
1. According to the LNG cold energy recovery type low-pressure circulation system, a compressor and a refrigerating system are not required to be arranged, the first fluorine pump conveys the R22 refrigerant of-20 degrees into the LNG heat exchanger and LNG liquid in the LNG heat exchanger to exchange heat, the temperature is reduced to-60 degrees, then the LNG cold energy recovery type low-pressure circulation system is sprayed on the top end of the inside of the low-pressure circulation barrel through the spraying device, meanwhile, the second fluorine pump conveys the R22 refrigerant of-20 degrees into the evaporator of the direct-cooling ice cube machine, gas is formed after evaporation and heat absorption are carried out through the evaporator, the refrigerant returns to the low-pressure circulation barrel and the LNG cooled liquid to exchange heat, the refrigerant after heat exchange respectively returns to the first fluorine pump and the second fluorine pump, LNG cold energy recovery refrigeration is achieved, the equipment is small in size, the occupied area of the equipment cost is small compared with that of a traditional LNG refrigerating system.
2. According to the utility model, the first filter is arranged on the first return pipe, the second filter is arranged on the second return pipe, so that the refrigerant recovered from the low-pressure circulation barrel can be filtered, and the obtained high-purity refrigerant is recovered into the first fluorine pump and the second fluorine pump for secondary use, and the energy is saved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of an LNG cold energy recovery type low pressure circulation system according to the present utility model;
fig. 2 is a schematic diagram of a partial front view of an LNG cold energy recovery type low pressure circulation system according to an embodiment of the present utility model;
fig. 3 is a schematic diagram of a partial rear view structure of an LNG cold energy recovery type low pressure circulation system according to an embodiment of the present utility model;
fig. 4 is a schematic diagram of the piping and valving system according to an embodiment of the present utility model.
The reference numerals in the figures illustrate:
1. An equipment rack; 2. a low pressure circulation tank; 3. a spraying device; 4. a first fluorine pump; 5. an LNG heat exchanger; 6. a second fluorine pump; 7. an evaporator of a direct-cooling ice cube machine; 8. a piping system; 801. a first return pipe; 802. a first connection pipe; 803. a second connection pipe; 804. a second return pipe; 805. a third connection pipe; 806. a fourth connection pipe; 9. a valve system; 901. a first valve; 902. a second valve; 903. a third valve; 904. a fourth valve; 905. a fifth valve; 906. a sixth valve; 10. a first filter; 11. a second filter; 12. a barrel pump liquid level device.
Detailed Description
The following describes in detail the examples of the present utility model, which are implemented on the premise of the technical solution of the present utility model, and detailed embodiments and specific operation procedures are given, but the scope of protection of the present utility model is not limited to the following examples. It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Example 1
As shown in fig. 1 to 4, the present embodiment provides an LNG cold energy recovery type low pressure circulation system, which includes an equipment rack 1, a low pressure circulation tank 2, a spray device 3, a first fluorine pump 4, an LNG heat exchanger 5, a second fluorine pump 6, a direct cooling ice block machine evaporator 7, a pipe system 8, a valve system 9, a first filter 10, a second filter 11, and a tank pump liquid level device 12.
As shown in fig. 1 to 3, the equipment rack 1 of the present embodiment adopts a rectangular frame structure in which a plurality of steel pipes are welded to each other.
As shown in fig. 1 to 3, the low-pressure circulation tank 2 of the present embodiment is supported by two symmetrical brackets, which are welded or screwed on top of the equipment bracket 1, respectively; the low-pressure circulation barrel 2 is mounted on the tops of the two brackets by bolts or directly welded on the tops of the two brackets; and the top both ends of the low pressure circulation barrel 2 of this embodiment have been seted up connector and air inlet respectively, and the bottom both ends of the low pressure circulation barrel 2 have been seted up first liquid outlet and second liquid outlet respectively.
As shown in fig. 1 to 4, the piping system 8 of the present embodiment includes a first return pipe 801, a first connection pipe 802, a second connection pipe 803, a second return pipe 804, a third connection pipe 805, and a fourth connection pipe 806; the valve system 9 comprises a first valve 901, a second valve 902, a third valve 903, a fourth valve 904, a fifth valve 905 and a sixth valve 906;
One port of the first return pipe 801 is welded and communicated with a first liquid outlet of the low-pressure circulation barrel 2, and the other port of the first return pipe 801 is welded and communicated with a liquid inlet of the first fluorine pump 4; one port of the first connecting pipe 802 is welded and communicated with the liquid outlet of the first fluorine pump 4, and the other port of the first connecting pipe 802 is welded and communicated with the liquid inlet of the LNG heat exchanger 5; one port of the second connecting pipe 803 is welded and communicated with the inlet of the spraying device 3, and the other port of the second connecting pipe 803 is welded and communicated with the liquid outlet of the LNG heat exchanger 5; one port of the second return pipe 804 is welded and communicated with a second liquid outlet of the low-pressure circulation barrel 2, and the other port of the second return pipe 804 is welded and communicated with a liquid inlet of the second fluorine pump 6; one port of the third connecting pipe 805 is welded and communicated with the liquid outlet of the second fluorine pump 6, and the other port of the third connecting pipe 805 is welded and communicated with the liquid inlet of the direct-cooling ice cube evaporator 7; one port of the fourth connecting pipe 806 is welded and communicated with the air outlet of the direct-cooling ice cube machine evaporator 7, and the other port of the fourth connecting pipe 806 is welded and communicated with the air inlet at the top of the low-pressure circulation barrel 2;
The first valve 901 is mounted on the first return line 801 using existing valve mounting techniques; the second valve 902 is mounted on the first connecting tube 802 using existing valve mounting techniques; the third valve 903 is mounted on the second connection pipe 803 using existing valve assembly techniques; fourth valve 904 is mounted to second return tube 804 using existing valve mounting techniques; the fifth valve 905 is mounted on the third connection tube 805 using existing valve assembly techniques; the sixth valve 906 is mounted on the fourth connecting tube 806 using existing valve assembly techniques;
as shown in fig. 1 to 4, the first filter 10 of the present embodiment is mounted on a first return pipe 801; second filter 11 is mounted on second return tube 804; the refrigerant recovered from the low-pressure circulation barrel 2 can be filtered, and the obtained high-purity refrigerant can be recovered into the first fluorine pump 4 and the second fluorine pump 6 for secondary use, so that energy sources are saved.
As shown in fig. 1 to 3, the drum pump level device 12 of the present embodiment is installed outside the low pressure circulation drum 2.
Working principle: the utility model provides an LNG cold energy recovery type low-pressure circulation system, which can be used by opening a second valve 902 on a first connecting pipe 802, conveying R22 refrigerant of-20 degrees into an LNG heat exchanger 5 by a first fluorine pump 4 and exchanging heat with LNG liquid in the LNG heat exchanger, reducing the temperature to-60 degrees, opening a third valve 903 on a second connecting pipe 803, introducing the exchanged refrigerant into a spraying device 3, spraying the refrigerant on the top end of the interior of a low-pressure circulation barrel 2 by the spraying device 3, simultaneously opening a fifth valve 905 on the third connecting pipe 805, conveying R22 refrigerant of-20 degrees into a direct-cooling ice machine evaporator 7 by a second fluorine pump 6, evaporating and absorbing heat by the evaporator to form gas by the evaporator, then opening a sixth valve 906 on the fourth connecting pipe 806, enabling high-temperature gas to return to the low-pressure circulation barrel 2, further exchanging heat with the LNG cooled liquid, opening the first valve 901 on the first connecting pipe 803, and opening a fourth valve 904 on the second connecting pipe 804, enabling the exchanged refrigerant to pass through a first fluorine filter 10 and a second fluorine return pipe 11, and realizing low-cost compared with a traditional refrigerating field, and a low-cost refrigerating field is realized by the low-pressure recovery type LNG cold energy recovery system.
The embodiments of the present utility model are disclosed as preferred embodiments, but not limited thereto, and those skilled in the art will readily appreciate from the foregoing description that various modifications and variations can be made without departing from the spirit of the present utility model.
Claims (5)
1. LNG cold energy recovery type low pressure circulation system, its characterized in that: the device comprises a device bracket (1), a low-pressure circulating barrel (2), a spraying device (3), a first fluorine pump (4), an LNG heat exchanger (5), a second fluorine pump (6), a direct-cooling ice cube machine evaporator (7) and a pipeline system (8); the low-pressure circulation barrel (2) is arranged at the top of the equipment bracket (1); the spraying device (3) is arranged at the top end of the inside of the low-pressure circulating barrel (2); the first fluorine pump (4) is arranged on the equipment bracket (1), a liquid inlet of the first fluorine pump (4) is communicated with a first liquid outlet of the low-pressure circulating barrel (2) through a pipeline system (8), a liquid outlet of the first fluorine pump (4) is communicated with a liquid inlet of the LNG heat exchanger (5) through the pipeline system (8), and a liquid outlet of the LNG heat exchanger (5) is communicated with an inlet of the spraying device (3) through the pipeline system (8); the second fluorine pump (6) is installed on the equipment support (1), and the inlet of the second fluorine pump (6) is communicated with the second liquid outlet of the low-pressure circulation barrel (2) through a pipeline system (8), the liquid outlet of the second fluorine pump (6) is communicated with the liquid inlet of the direct-cooling ice cube evaporator (7) through the pipeline system (8), and the air outlet of the direct-cooling ice cube evaporator (7) is communicated with the air inlet at the top of the low-pressure circulation barrel (2) through the pipeline system (8).
2. The LNG cold energy recovery type low pressure circulation system according to claim 1, wherein: the pipe system (8) comprises a first return pipe (801), a first connection pipe (802), a second connection pipe (803), a second return pipe (804), a third connection pipe (805) and a fourth connection pipe (806); one port of the first return pipe (801) is communicated with a first liquid outlet of the low-pressure circulation barrel (2), and the other port of the first return pipe (801) is communicated with a liquid inlet of the first fluorine pump (4); one port of the first connecting pipe (802) is communicated with a liquid outlet of the first fluorine pump (4), and the other port of the first connecting pipe (802) is communicated with a liquid inlet of the LNG heat exchanger (5); one port of the second connecting pipe (803) is communicated with the inlet of the spraying device (3), and the other port of the second connecting pipe (803) is communicated with the liquid outlet of the LNG heat exchanger (5); one port of the second return pipe (804) is communicated with a second liquid outlet of the low-pressure circulation barrel (2), and the other port of the second return pipe (804) is communicated with a liquid inlet of the second fluorine pump (6); one port of the third connecting pipe (805) is communicated with a liquid outlet of the second fluorine pump (6), and the other port of the third connecting pipe (805) is communicated with a liquid inlet of the direct-cooling ice cube evaporator (7); one port of the fourth connecting pipe (806) is communicated with an air outlet of the direct-cooling ice cube evaporator (7), and the other port of the fourth connecting pipe (806) is communicated with an air inlet at the top of the low-pressure circulation barrel (2).
3. The LNG cold energy recovery type low pressure circulation system according to claim 2, wherein: also included is a valve system (9), the valve system (9) comprising a first valve (901), a second valve (902), a third valve (903), a fourth valve (904), a fifth valve (905) and a sixth valve (906); -said first valve (901) is fitted to said first return pipe (801); -said second valve (902) is fitted on said first connection tube (802); the third valve (903) is assembled on the second connecting pipe (803); -said fourth valve (904) is fitted on said second return tube (804); the fifth valve (905) is assembled on the third connecting pipe (805); the sixth valve (906) is fitted on the fourth connecting pipe (806).
4. The LNG cold energy recovery type low pressure circulation system according to claim 3, wherein: also comprises a first filter (10) and a second filter (11); -said first filter (10) is fitted on said first return tube (801); the second filter (11) is fitted to the second return tube (804).
5. The LNG cold energy recovery type low pressure circulation system according to claim 1, wherein: the low-pressure circulating barrel comprises a barrel pump liquid level device (12), and the barrel pump liquid level device (12) is arranged outside the low-pressure circulating barrel (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323626484.4U CN221505307U (en) | 2023-12-29 | 2023-12-29 | LNG cold energy recovery type low-pressure circulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323626484.4U CN221505307U (en) | 2023-12-29 | 2023-12-29 | LNG cold energy recovery type low-pressure circulation system |
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| Publication Number | Publication Date |
|---|---|
| CN221505307U true CN221505307U (en) | 2024-08-09 |
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ID=92128480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323626484.4U Active CN221505307U (en) | 2023-12-29 | 2023-12-29 | LNG cold energy recovery type low-pressure circulation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221505307U (en) |
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2023
- 2023-12-29 CN CN202323626484.4U patent/CN221505307U/en active Active
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