CN221074217U - Three-phase separation integrated device is arranged by force to natural gas well site efflux - Google Patents
Three-phase separation integrated device is arranged by force to natural gas well site efflux Download PDFInfo
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- CN221074217U CN221074217U CN202322928554.5U CN202322928554U CN221074217U CN 221074217 U CN221074217 U CN 221074217U CN 202322928554 U CN202322928554 U CN 202322928554U CN 221074217 U CN221074217 U CN 221074217U
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- 238000005191 phase separation Methods 0.000 title claims abstract description 24
- 239000002343 natural gas well Substances 0.000 title claims abstract description 19
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 122
- 239000007789 gas Substances 0.000 claims abstract description 75
- 239000003345 natural gas Substances 0.000 claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000002737 fuel gas Substances 0.000 claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 238000010248 power generation Methods 0.000 claims abstract description 10
- 238000000926 separation method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000009096 changqing Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The utility model discloses a natural gas well site jet forced-drainage three-phase separation integrated device, which comprises a three-phase separator, wherein the three-phase separator is communicated with a natural gas conveying pipe through a liquid inlet pipe, the three-phase separator is connected with a natural gas production area through a first gas outlet pipe, the first gas outlet pipe is connected with a fuel gas buffer tank through a third gas outlet pipe, the fuel gas buffer tank is connected with a natural gas site power generation area through a second gas outlet pipe, and the second gas outlet pipe is provided with a seventh valve; an atomizer is arranged on the first air outlet pipe, the atomizer is connected with a diaphragm metering pump through a first oil pipe, and the diaphragm metering pump is connected with a three-phase separator through the first oil pipe; the three-phase separator is connected with the natural gas water collecting area through a first water outlet pipe. The jet forced-drainage three-phase separation integrated device for the natural gas well site has the advantages that the produced liquid is reinjected after being treated on site or is treated by outward transportation, and the load of a produced gas pipeline is reduced. Condensate oil is conveyed to a gas production pipeline after being atomized, well site facilities are simplified, and the problem that gas and liquid cannot be separated in the development of medium-high water-containing gas reservoirs is solved.
Description
Technical Field
The utility model belongs to the technical field of natural gas well site jet forced-drainage equipment, and particularly relates to a natural gas well site jet forced-drainage three-phase separation integrated device.
Background
At present, the residual movable reserve of the high-water-content gas reservoir in the Changqing gas field is large in scale, is a main successor of the benefit construction and production of the fourteen-five gas zone, and has great significance in benefit development of stable production on the gas field. However, the gas well productivity is lower in medium-high water gas reservoirs due to the high water-gas ratio. The conventional gas reservoir has low water-gas ratio, a well site is not provided with a separation facility, a gas-liquid mixed transportation mode is adopted, and well head mixed liquid directly enters a downstream station site where gas transportation pipeline is completed for gas-liquid separation. The conventional gathering and transportation process can not meet the development requirement of gas-liquid separation of medium-high water-containing gas reservoirs.
Disclosure of utility model
The utility model aims to provide a jet forced-drainage three-phase separation integrated device for a natural gas well site, which solves the problem that gas and liquid cannot be separated in the development of a medium-high water-containing gas reservoir.
The technical scheme adopted by the utility model is that the jet forced-exhausting three-phase separation integrated device of the natural gas well site comprises a three-phase separator, wherein the three-phase separator is communicated with a natural gas conveying pipe through a liquid inlet pipe, the three-phase separator is connected with a natural gas collecting area through a first gas outlet pipe, the first gas outlet pipe is connected with a fuel gas buffer tank through a third gas outlet pipe, the fuel gas buffer tank is connected with a natural gas site power generation area through a second gas outlet pipe, and the second gas outlet pipe is provided with a seventh valve;
An atomizer is arranged on the first air outlet pipe, the atomizer is connected with a diaphragm metering pump through a second oil pipe, and the diaphragm metering pump is connected with a three-phase separator through a third oil pipe;
the three-phase separator is connected with the natural gas water collecting area through a first water outlet pipe.
The utility model is also characterized in that:
The three-phase separator is connected with the natural gas emptying zone through a second emptying pipe.
The second oil pipe is communicated with the third oil pipe through a first oil pipe, a first valve is arranged on the third oil pipe, the first valve is arranged between the output end of the first oil pipe and the input end of the diaphragm metering pump, the input end of the first oil pipe is arranged between the diaphragm metering pump and the atomizer, and a first safety valve is arranged on the first oil pipe.
The fuel gas buffer tank is connected with the first water outlet pipe through a second water outlet pipe, and the second water outlet pipe is provided with a second valve.
The liquid inlet pipe is provided with a third valve which is arranged between the three-phase separator and the natural gas conveying pipe.
The first air outlet pipe is provided with a fourth valve, the fourth valve is arranged between the three-phase separator and the atomizer, and the input end of the third air outlet pipe is arranged between the fourth valve and the atomizer.
The first water outlet pipe is provided with a fifth valve, and the fifth valve is arranged between the three-phase separator and the natural gas water collecting area.
The third air outlet pipe is provided with a sixth valve, and the sixth valve is arranged between the fuel gas buffer tank and the first air outlet pipe.
The fuel gas buffer tank is connected with a second blow-down pipe through a first blow-down pipe, a second safety valve is arranged on the first blow-down pipe, and a third safety valve is arranged on the second blow-down pipe.
The beneficial effects of the utility model are as follows:
according to the integrated device for the forced-exhaust three-phase separation of the jet flow of the natural gas well site, provided by the utility model, gas and liquid can be separated, and the produced liquid is reinjected or carried out after being treated in situ, so that the load of a produced gas pipeline is reduced. Condensate oil is conveyed to a gas production pipeline after being atomized, and is not treated or stored at a well site, so that well site facilities are simplified, and investment is saved. The three-phase separator, the diaphragm metering pump, the fuel gas buffer tank and accessories thereof are arranged in a sledge way, the structure is compact, the land area is saved, the installation and the transportation are convenient, the three-phase separator, the diaphragm metering pump, the fuel gas buffer tank and accessories thereof are key technologies for solving the technical problems of jet flow drainage, production and injection integrated process upgrading, skid-mounting of ground equipment and the like, and a new path is explored for the development of medium-high water-containing gas reservoirs.
Drawings
FIG. 1 is a schematic diagram of a natural gas well site jet forced-drainage three-phase separation integrated device.
In the figure, a three-phase separator, a diaphragm metering pump, a fuel gas buffer tank, a 4-atomizer, a 5-first blow-down pipe, a 6-first oil pipe, a 7-liquid inlet pipe, a 8-first air outlet pipe, a 9-first water outlet pipe, a 10-second blow-down pipe, a 11-second oil pipe, a 12-second air outlet pipe, a 13-second water outlet pipe, a 14-third air outlet pipe, a 15-first valve, a 16-second valve, a 17-third valve, a 18-fourth valve, a 19-fifth valve, a 20-sixth valve, a 21-seventh valve, a 22-first safety valve, a 23-second safety valve, a 24-third safety valve, a 25-third oil pipe.
Detailed Description
The utility model will be described in detail below with reference to the drawings and the detailed description.
The utility model provides a jet forced-exhausting three-phase separation integrated device for a natural gas well site, which comprises a three-phase separator 1, as shown in fig. 1, wherein the three-phase separator 1 is communicated with a natural gas conveying pipe through a liquid inlet pipe 7, the natural gas conveying pipe conveys natural gas to the three-phase separator 1 through the liquid inlet pipe 7, the three-phase separator 1 is connected with a natural gas production area through a first gas outlet pipe 8, gas phases separated by the three-phase separator 1 are conveyed to the natural gas production area through the first gas outlet pipe 8, the first gas outlet pipe 8 is connected with a fuel gas buffer tank 3 through a third gas outlet pipe 14, the gas in the first gas outlet pipe 8 is shunted to the fuel gas buffer tank 3, the fuel gas buffer tank 3 is connected with a natural gas site power generation area through a second gas outlet pipe 12, the shunted gas is used for factory power generation, and the second gas outlet pipe 12 is provided with a seventh valve 21. Be equipped with atomizer 4 on the first outlet duct 8, atomizer 4 is connected with diaphragm metering pump 2 through second oil pipe 11, and diaphragm metering pump 2 is connected with three-phase separator 1 through third oil pipe 25, and the oil phase that three-phase separator 1 separated is pressurized through diaphragm metering pump 2, carries to atomizer 4 through second oil pipe 11 and atomizes, carries together with the gas in the first outlet duct 8 at last. The three-phase separator 1 is connected with the natural gas water collecting area through a first water outlet pipe 9, and the water phase separated by the three-phase separator 1 is conveyed to the natural gas water collecting area. The three-phase separator 1 is connected to a natural gas vent via a second vent pipe 10. The second oil pipe 11 is communicated with the third oil pipe 25 through the first oil pipe 6, the third oil pipe 25 is provided with a first valve 15, the first valve 15 is arranged between the output end of the first oil pipe 6 and the input end of the diaphragm metering pump 2, the input end of the first oil pipe 6 is positioned between the diaphragm metering pump 2 and the atomizer 4, the first oil pipe 6 is provided with a first safety valve 22, and when the pressure in the second oil pipe 11 exceeds the set pressure of the first safety valve 22, the first safety valve 22 is opened for pressure relief. The fuel gas buffer tank 3 is connected with the first water outlet pipe 9 through a second water outlet pipe 13, the second water outlet pipe 13 is provided with a second valve 16, and the water phase in the fuel gas buffer tank 3 is conveyed to the natural gas water collecting area through the second water outlet pipe 13. The liquid inlet pipe 7 is provided with a third valve 17, and the third valve 17 is arranged between the three-phase separator 1 and the natural gas conveying pipe. The first air outlet pipe 8 is provided with a fourth valve 18, the fourth valve 18 is arranged between the three-phase separator 1 and the atomizer 4, and the input end of the third air outlet pipe 14 is arranged between the fourth valve 18 and the atomizer 4. The first water outlet pipe 9 is provided with a fifth valve 19, and the fifth valve 19 is arranged between the three-phase separator 1 and the natural gas water collecting area. The third outlet pipe 14 is provided with a sixth valve 20, and the sixth valve 20 is arranged between the fuel gas buffer tank 3 and the first outlet pipe 8. The fuel gas buffer tank 3 is connected with the second blow-down pipe 10 through the first blow-down pipe 5, is equipped with the second relief valve 23 on the first blow-down pipe 5, is equipped with the third relief valve 24 on the second blow-down pipe 10, guarantees the security of device.
The utility model provides a natural gas well site jet flow forced-drainage three-phase separation integrated device, which has the working principle that: the wellhead mixed liquid enters the three-phase separator 1 through the liquid inlet pipe 7 to carry out three-phase separation of gas, water and oil, the gas phase is externally conveyed to a natural gas production area through the gas outlet pipe 8, and the water phase is externally conveyed to a natural gas water collecting area through the water outlet pipe 9. The three-phase separator 1 is connected with the diaphragm metering pump 2 through a third oil pipe 25, the diaphragm metering pump 2 is connected with the atomizer 4 through a second oil pipe 11, the atomizer is connected to the air outlet pipe 8, the oil phase enters the diaphragm metering pump 2 from the three-phase separator 1 through the third oil pipe 25, enters the atomizer 4 through the second oil pipe 11 after being pressurized for atomization, then enters the air outlet pipe 8, and is conveyed to a natural gas production area together with gas phase. The fuel gas buffer tank 3 is directly connected with the first air outlet pipe 8 through the third air outlet pipe 14, and the fuel gas enters the fuel gas buffer tank 3 from the air outlet pipe 8 through the third air outlet pipe 14 and is then conveyed to a natural gas field power generation area through the second air outlet pipe 12.
Example 1
The integrated device for the forced-exhaust three-phase separation of the jet flow of the natural gas well site provided by the embodiment comprises a three-phase separator 1, as shown in fig. 1, wherein the three-phase separator 1 is communicated with a natural gas conveying pipe through a liquid inlet pipe 7, the three-phase separator 1 is connected with a natural gas production area through a first gas outlet pipe 8, the first gas outlet pipe 8 is connected with a fuel gas buffer tank 3 through a third gas outlet pipe 14, the fuel gas buffer tank 3 is connected with a natural gas site power generation area through a second gas outlet pipe 12, and the second gas outlet pipe 12 is provided with a seventh valve 21; the first air outlet pipe 8 is provided with an atomizer 4, the atomizer 4 is connected with a diaphragm metering pump 2 through a second oil pipe 11, and the diaphragm metering pump 2 is connected with the three-phase separator 1 through a third oil pipe 25; the three-phase separator 1 is connected with a natural gas water collecting area through a first water outlet pipe 9.
Example 2
The integrated device for the forced-exhaust three-phase separation of the jet flow of the natural gas well site provided by the embodiment comprises a three-phase separator 1, as shown in fig. 1, wherein the three-phase separator 1 is communicated with a natural gas conveying pipe through a liquid inlet pipe 7, the three-phase separator 1 is connected with a natural gas production area through a first gas outlet pipe 8, the first gas outlet pipe 8 is connected with a fuel gas buffer tank 3 through a third gas outlet pipe 14, the fuel gas buffer tank 3 is connected with a natural gas site power generation area through a second gas outlet pipe 12, and the second gas outlet pipe 12 is provided with a seventh valve 21; the first air outlet pipe 8 is provided with an atomizer 4, the atomizer 4 is connected with a diaphragm metering pump 2 through a second oil pipe 11, and the diaphragm metering pump 2 is connected with the three-phase separator 1 through a third oil pipe 25; the three-phase separator 1 is connected with a natural gas water collecting area through a first water outlet pipe 9.
The three-phase separator 1 is connected to a natural gas vent via a second vent pipe 10.
The second oil pipe 11 is communicated with the third oil pipe 25 through the first oil pipe 6, the third oil pipe 25 is provided with a first valve 15, the first valve 15 is arranged between the output end of the first oil pipe 6 and the input end of the diaphragm metering pump 2, the input end of the first oil pipe 6 is arranged between the diaphragm metering pump 2 and the atomizer 4, and the first oil pipe 6 is provided with a first safety valve 22.
Example 3
The integrated device for the forced-exhaust three-phase separation of the jet flow of the natural gas well site provided by the embodiment comprises a three-phase separator 1, as shown in fig. 1, wherein the three-phase separator 1 is communicated with a natural gas conveying pipe through a liquid inlet pipe 7, the three-phase separator 1 is connected with a natural gas production area through a first gas outlet pipe 8, the first gas outlet pipe 8 is connected with a fuel gas buffer tank 3 through a third gas outlet pipe 14, the fuel gas buffer tank 3 is connected with a natural gas site power generation area through a second gas outlet pipe 12, and the second gas outlet pipe 12 is provided with a seventh valve 21; the first air outlet pipe 8 is provided with an atomizer 4, the atomizer 4 is connected with a diaphragm metering pump 2 through a second oil pipe 11, and the diaphragm metering pump 2 is connected with the three-phase separator 1 through a third oil pipe 25; the three-phase separator 1 is connected with a natural gas water collecting area through a first water outlet pipe 9.
The three-phase separator 1 is connected to a natural gas vent via a second vent pipe 10.
The second oil pipe 11 is communicated with the third oil pipe 25 through the first oil pipe 6, the third oil pipe 25 is provided with a first valve 15, the first valve 15 is arranged between the output end of the first oil pipe 6 and the input end of the diaphragm metering pump 2, the input end of the first oil pipe 6 is arranged between the diaphragm metering pump 2 and the atomizer 4, and the first oil pipe 6 is provided with a first safety valve 22.
The fuel gas buffer tank 3 is connected to the first outlet pipe 9 via a second outlet pipe 13, the second outlet pipe 13 being provided with a second valve 16.
The liquid inlet pipe 7 is provided with a third valve 17, and the third valve 17 is arranged between the three-phase separator 1 and the natural gas conveying pipe.
Example 4
The integrated device for the forced-exhaust three-phase separation of the jet flow of the natural gas well site provided by the embodiment comprises a three-phase separator 1, as shown in fig. 1, wherein the three-phase separator 1 is communicated with a natural gas conveying pipe through a liquid inlet pipe 7, the three-phase separator 1 is connected with a natural gas production area through a first gas outlet pipe 8, the first gas outlet pipe 8 is connected with a fuel gas buffer tank 3 through a third gas outlet pipe 14, the fuel gas buffer tank 3 is connected with a natural gas site power generation area through a second gas outlet pipe 12, and the second gas outlet pipe 12 is provided with a seventh valve 21; the first air outlet pipe 8 is provided with an atomizer 4, the atomizer 4 is connected with a diaphragm metering pump 2 through a second oil pipe 11, and the diaphragm metering pump 2 is connected with the three-phase separator 1 through a third oil pipe 25; the three-phase separator 1 is connected with a natural gas water collecting area through a first water outlet pipe 9.
The three-phase separator 1 is connected to a natural gas vent via a second vent pipe 10.
The second oil pipe 11 is communicated with the third oil pipe 25 through the first oil pipe 6, the third oil pipe 25 is provided with a first valve 15, the first valve 15 is arranged between the output end of the first oil pipe 6 and the input end of the diaphragm metering pump 2, the input end of the first oil pipe 6 is arranged between the diaphragm metering pump 2 and the atomizer 4, and the first oil pipe 6 is provided with a first safety valve 22.
The fuel gas buffer tank 3 is connected to the first outlet pipe 9 via a second outlet pipe 13, the second outlet pipe 13 being provided with a second valve 16.
The liquid inlet pipe 7 is provided with a third valve 17, and the third valve 17 is arranged between the three-phase separator 1 and the natural gas conveying pipe.
The first air outlet pipe 8 is provided with a fourth valve 18, the fourth valve 18 is arranged between the three-phase separator 1 and the atomizer 4, and the input end of the third air outlet pipe 14 is arranged between the fourth valve 18 and the atomizer 4.
The first water outlet pipe 9 is provided with a fifth valve 19, and the fifth valve 19 is arranged between the three-phase separator 1 and the natural gas water collecting area.
The third outlet pipe 14 is provided with a sixth valve 20, and the sixth valve 20 is arranged between the fuel gas buffer tank 3 and the first outlet pipe 8.
The fuel gas buffer tank 3 is connected with the second blow-down pipe 10 through the first blow-down pipe 5, the second relief valve 23 is arranged on the first blow-down pipe 5, and the third relief valve 24 is arranged on the second blow-down pipe 10.
Claims (9)
1. The integrated device is characterized by comprising a three-phase separator (1), wherein the three-phase separator (1) is communicated with a natural gas conveying pipe through a liquid inlet pipe (7), the three-phase separator (1) is connected with a natural gas production area through a first gas outlet pipe (8), the first gas outlet pipe (8) is connected with a fuel gas buffer tank (3) through a third gas outlet pipe (14), the fuel gas buffer tank (3) is connected with a natural gas field power generation area through a second gas outlet pipe (12), and the second gas outlet pipe (12) is provided with a seventh valve (21);
An atomizer (4) is arranged on the first air outlet pipe (8), the atomizer (4) is connected with a diaphragm metering pump (2) through a second oil pipe (11), and the diaphragm metering pump (2) is connected with the three-phase separator (1) through a third oil pipe (25);
the three-phase separator (1) is connected with the natural gas water collecting area through a first water outlet pipe (9).
2. The integrated device for forced-drainage and three-phase separation of natural gas wellsite jets according to claim 1, wherein the three-phase separator (1) is connected to a natural gas evacuation zone by means of a second evacuation pipe (10).
3. The integrated device for forced-exhaust three-phase separation of natural gas well site jet flow according to claim 1, wherein the second oil pipe (11) is communicated with the third oil pipe (25) through a first oil pipe (6), a first valve (15) is arranged on the third oil pipe (25), the first valve (15) is arranged between the output end of the first oil pipe (6) and the input end of the diaphragm metering pump (2), the input end of the first oil pipe (6) is arranged between the diaphragm metering pump (2) and the atomizer (4), and a first safety valve (22) is arranged on the first oil pipe (6).
4. The integrated device for forced-exhaust three-phase separation of natural gas wellsite jet according to claim 1, wherein the fuel gas buffer tank (3) is connected with the first water outlet pipe (9) through a second water outlet pipe (13), and the second water outlet pipe (13) is provided with a second valve (16).
5. The integrated device for forced-drainage and three-phase separation of natural gas well site jet flow according to claim 1, wherein the liquid inlet pipe (7) is provided with a third valve (17), and the third valve (17) is arranged between the three-phase separator (1) and a natural gas conveying pipe.
6. The integrated device for forced-exhaust three-phase separation of natural gas wellsite jet flow according to claim 1, wherein the first gas outlet pipe (8) is provided with a fourth valve (18), the fourth valve (18) is arranged between the three-phase separator (1) and the atomizer (4), and the input end of the third gas outlet pipe (14) is arranged between the fourth valve (18) and the atomizer (4).
7. The integrated device for forced-exhaust three-phase separation of natural gas well site jet flow according to claim 1, wherein the first water outlet pipe (9) is provided with a fifth valve (19), and the fifth valve (19) is arranged between the three-phase separator (1) and a natural gas water collecting area.
8. The integrated device for forced-exhaust three-phase separation of natural gas wellsite jet according to claim 1, wherein the third gas outlet pipe (14) is provided with a sixth valve (20), and the sixth valve (20) is arranged between the fuel gas buffer tank (3) and the first gas outlet pipe (8).
9. The integrated device for forced-exhaust three-phase separation of natural gas wellsite jet according to claim 2, wherein the fuel gas buffer tank (3) is connected with the second blow-down pipe (10) through a first blow-down pipe (5), a second safety valve (23) is arranged on the first blow-down pipe (5), and a third safety valve (24) is arranged on the second blow-down pipe (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322928554.5U CN221074217U (en) | 2023-10-31 | 2023-10-31 | Three-phase separation integrated device is arranged by force to natural gas well site efflux |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322928554.5U CN221074217U (en) | 2023-10-31 | 2023-10-31 | Three-phase separation integrated device is arranged by force to natural gas well site efflux |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221074217U true CN221074217U (en) | 2024-06-04 |
Family
ID=91274497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322928554.5U Active CN221074217U (en) | 2023-10-31 | 2023-10-31 | Three-phase separation integrated device is arranged by force to natural gas well site efflux |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221074217U (en) |
-
2023
- 2023-10-31 CN CN202322928554.5U patent/CN221074217U/en active Active
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