CN219691887U - Aviation red oil ultrahigh-pressure power station - Google Patents
Aviation red oil ultrahigh-pressure power station Download PDFInfo
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- CN219691887U CN219691887U CN202320442359.9U CN202320442359U CN219691887U CN 219691887 U CN219691887 U CN 219691887U CN 202320442359 U CN202320442359 U CN 202320442359U CN 219691887 U CN219691887 U CN 219691887U
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- 239000003921 oil Substances 0.000 claims description 101
- 239000007788 liquid Substances 0.000 claims description 11
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 239000010720 hydraulic oil Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 11
- 238000012360 testing method Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000011664 signaling Effects 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
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Abstract
The utility model discloses an aviation red oil ultrahigh pressure power station, which comprises an oil tank, wherein an ultrahigh pressure pump set is arranged at the top of the oil tank, and a mounting panel is arranged at the top of the oil tank.
Description
Technical Field
The utility model relates to the technical field of hydraulic tests, in particular to an aviation red oil ultrahigh-pressure power station.
Background
With the development of the aerospace field, the requirements on the inspection, inspection and test of parts in the production and manufacturing process are more and more severe, and in order to achieve higher reliability requirements, certain parts need to be subjected to corresponding hydraulic tests before being put into formal use, and the tests possibly relate to tightness tests, leakage tests, cracking tests and the like, wherein the tests need to be applied to a hydraulic power station, and hydraulic oil used by the hydraulic power station is aviation red oil;
for the common hydraulic power station in the existing market, the requirements of ultrahigh pressure, pressure maintaining zero leakage in the system, system pressure maintaining during system shutdown, remote monitoring and remote system pressure regulating and effective unloading of the system are difficult to simultaneously achieve in the test field, and therefore, the hydraulic power station capable of simultaneously meeting the requirements is designed.
Disclosure of Invention
The utility model provides an aviation red oil ultrahigh-pressure power station, which can effectively solve the problems that the conventional common hydraulic power station in the market is proposed in the background technology, and the ultrahigh-pressure requirement, the requirement of pressure maintaining zero leakage in a system, the requirement of system pressure maintaining during system shutdown, the requirement of remote monitoring and remote system pressure regulation and the requirement of effective unloading of the system are difficult to simultaneously achieve in the test field.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an aviation red oil super high pressure power station, includes the oil tank, the oil tank top is provided with the super high pressure pump package, the oil tank top is provided with the installation panel, the hydraulic valve piece is installed at installation panel top, the proportional overflow valve is installed at hydraulic valve piece top, super high pressure filter is installed in the integration of hydraulic valve piece one side, the check valve is installed to the one end of super high pressure filter, super high pressure stop reversing valve is installed to hydraulic valve piece one side, the energy storage ware is installed at hydraulic valve piece top, the backpressure valve is installed to hydraulic valve piece top corresponding to proportional overflow valve one side, first manometer is installed to installation panel one side, the second manometer is installed to installation panel one side corresponding to first manometer top, the second super high pressure ball valve is installed to hydraulic valve piece bottom, first super high pressure ball valve is installed at hydraulic valve piece top, pressure sensor is installed at hydraulic valve piece top;
the utility model discloses a solar energy water heater, including oil tank, floating ball level switch, temperature sensor, air cleaner, removable base, oil tank bottom, plate heat exchanger is installed to oil tank one side, oil return filter is installed on the top of oil tank, oil tank internally mounted has oil absorption filter, the liquid level thermometer is installed to one side of oil tank, the floater level switch is installed on the top of oil tank, temperature sensor is installed to installation panel one side, air cleaner is installed on the oil tank top, removable base is installed to the oil tank bottom.
Preferably, the plate heat exchanger is connected with an oil return filter at the top end of the oil tank through a clamping sleeve hard pipe, and the plate heat exchanger is connected with a hydraulic valve block through the clamping sleeve hard pipe;
the volume of the oil tank is 200L-300L.
Preferably, the ultrahigh pressure filter, the proportional overflow valve, the pressure sensor, the energy accumulator, the first ultrahigh pressure ball valve, the second ultrahigh pressure ball valve and the back pressure valve on the hydraulic valve block are connected through a fastener and a hydraulic joint;
the second pressure gauge and the first pressure gauge are kept connected with the hydraulic valve block through the pressure measuring connector, the ultrahigh pressure stop reversing valve is connected with the oil tank through the connector and the bendable clamping sleeve hard pipe, and the ultrahigh pressure stop reversing valve is connected with the hydraulic valve block through the connector and the bendable clamping sleeve hard pipe.
Preferably, the ultrahigh pressure stop reversing valve, the one-way valve and the hydraulic valve block are connected through a connector and a clamping sleeve hard pipe.
Preferably, the one-way valve, the ultrahigh pressure filter, the proportional overflow valve, the second pressure gauge, the first pressure gauge, the pressure sensor, the ultrahigh pressure stop reversing valve, the energy accumulator, the first ultrahigh pressure ball valve, the second ultrahigh pressure ball valve and the back pressure valve form a hydraulic valve group.
Preferably, the outlet of the ultra-high pressure pump set is connected to a hydraulic valve block on the oil tank through a hose, and the inlet of the ultra-high pressure pump set is connected with the oil suction filter.
Compared with the prior art, the utility model has the beneficial effects that: the utility model has scientific and reasonable structure and safe and convenient use:
1. the inlet of the ultra-high pressure pump set is connected with the oil absorption filter, so that the cleanliness of oil in the system is guaranteed, the ultra-high pressure pump set is connected to the valve block group through EO2-FORM high-pressure forming hard pipe fittings respectively, the connection rigidity and sealing performance of the connection can be guaranteed, the temperature sensor and the floating ball liquid level switch monitor whether the temperature and the liquid level of medium in the oil tank meet the requirements respectively, the oil return filter further eliminates solid pollutants of working medium of the hydraulic system, the ultra-high pressure filter cleans the medium entering the hydraulic system, the working medium is kept clean, the pollution of tested components or hydraulic components is avoided, the filter has the function of blocking the signaling, and the safety of an aviation red oil ultra-high pressure power station can be guaranteed through remotely monitoring the state of the signaling device.
2. The proportional overflow valve can realize electric proportional adjustment on the pressure in the hydraulic system, so that the system pressure can be adjusted remotely and steplessly, and the system pressure adjustment is at the lowest pressure under the condition of power failure, thereby ensuring the safety of the system;
the one-way valve has reliable performance, can ensure that the oil passing through the valve is free from internal leakage, prevents pressure reaction, can well maintain pressure, is almost 0 in reverse leakage, and can realize good pressure maintaining effect;
the ultrahigh pressure stop reversing valve adopts a 2-bit 2-electricity control valve, so that the on-off of the ultrahigh pressure stop reversing valve can be remotely controlled, the pressure relief effect of the system is realized when the ultrahigh pressure stop reversing valve is opened, the pressure maintaining is realized when the ultrahigh pressure stop reversing valve is closed, the system adopts normally open electromagnetic control, and when the valve is powered off or fails and has a power failure, the system can automatically relieve the pressure, so that the safety of the system is ensured;
the back pressure valve adopts a plate type installation mode, and is directly installed on the hydraulic valve block through a fastener, so that the oil return pressure value of the tested component can be adjusted.
3. The ultrahigh pressure energy accumulator can play a role in stabilizing the system pressure, can be used for supplementing oil leakage of the system to maintain constant pressure during shutdown, and can be used for maintaining pressure through the energy accumulator during shutdown when the tested components have smaller leakage quantity so as to achieve the purpose of saving the electric power cost.
4. The inlet of the plate heat exchanger is connected with the oil return port of the power station, the outlet of the plate heat exchanger is connected with the oil return filter, and the other two interfaces of the plate heat exchanger are cold water interfaces, so that the condition that the working medium temperature of the system is too high is prevented, and the tested medium can reach the aim of cleaning through the oil return filter.
In summary, provide power through the ultra-high pressure pump package, ultra-high pressure filter, oil absorption filter and oil return filter carry out the filtration of pollutant, make working medium keep clean, avoid polluting by survey components and parts or hydraulic components and parts, can pass through the state of this signaling device of remote monitoring, the security of system has been guaranteed, the proportion overflow valve realizes long-range electric proportion regulation, system pressure regulating will be in minimum pressure under the outage condition, the proportion overflow valve, the check valve, ultra-high pressure stop reversing valve and backpressure valve all can adjust the inside pressure of power station, carry out pressure regulating pressure release work, ensure aviation red oily ultra-high pressure power station's safety, plate heat exchanger plays the cooling effect, and a compact structure, rationally distributed, make things convenient for outside control and operation this equipment.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model.
In the drawings:
FIG. 1 is a front view of a power station of the present utility model;
FIG. 2 is a side view of the power station of the present utility model;
FIG. 3 is a top view of the power station of the present utility model;
FIG. 4 is a perspective view of a power station of the present utility model;
FIG. 5 is a schematic diagram of a power station hydraulic system of the present utility model;
reference numerals in the drawings: 1. an ultra-high pressure pump group; 2. a proportional overflow valve; 3. an ultra-high pressure filter; 4. a one-way valve; 5. an ultrahigh-pressure stop reversing valve; 6. an accumulator; 7. a back pressure valve; 8. the second ultrahigh-pressure ball valve; 9. a second pressure gauge; 10. a first pressure gauge; 11. a pressure sensor; 12. a plate heat exchanger; 13. an oil return filter; 14. an oil absorption filter; 15. a liquid level thermometer; 16. an oil tank; 17. a float ball liquid level switch; 18. a temperature sensor; 19. an air cleaner; 20. a first ultra-high pressure ball valve; 21. and a detachable base.
Detailed Description
The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present utility model only, and are not intended to limit the present utility model.
Examples: as shown in fig. 1-5, the utility model provides a technical scheme, namely an aviation red oil ultrahigh-pressure power station, wherein the serial numbers of corresponding components in fig. 5 are consistent with the serial numbers of corresponding components in fig. 1-4;
the device comprises an oil tank 16, wherein the volume of the oil tank 16 is 200L-300L, and an ultrahigh pressure pump set 1 is arranged at the top of the oil tank 16;
the ultra-high pressure pump set 1 is a power source, and comprises a three-phase asynchronous motor, a bell jar coupler, a coupler and an ultra-high pressure plunger pump, wherein the pump head part of the ultra-high pressure pump set 1 is positioned in an oil tank 16, a driving motor of the ultra-high pressure pump set 1 is arranged outside the oil tank 16, the ultra-high pressure pump set 1 is directly arranged on the oil tank 16, the installation base of the ultra-high pressure pump set 1 is omitted, the cost and the installation space are saved, and the parameters of the motor are as follows: AC380V/50Hz/30KW/1450r/min, the pump head is selected as a plunger pump, and the parameters are as follows: rated pressure 70 MPa/rated flow 23L/min@1450r/min;
the ultra-high pressure pump set 1 is connected to the valve block set through a high pressure hose, a plate passing connector and an EO2-FORM high pressure forming hard pipe fitting respectively, and the EO2-FORM pipe fitting is a new generation high pressure forming pipe fitting product, so that the connection rigidity and the sealing performance of the connection part can be ensured;
the outlet of the ultra-high pressure pump set 1 is connected to a hydraulic valve block on the oil tank 16 through a hose, and the inlet of the ultra-high pressure pump set 1 is connected with the oil suction filter 14, so that the cleanliness of oil in the system is ensured;
the top of the oil tank 16 is provided with a mounting panel, the top of the mounting panel is provided with a hydraulic valve block, and the top of the hydraulic valve block is provided with a proportional overflow valve 2;
the proportional overflow valve 2 can realize electric proportional adjustment of the pressure in the hydraulic system, so that the system pressure can be remotely and steplessly adjusted, the system pressure is at the lowest pressure under the condition of power failure, the safety of the system is ensured, the proportional overflow valve is arranged on a hydraulic valve block, and the inlet of the proportional overflow valve is directly connected with the outlet of the pump;
the ultrahigh pressure filter 3 is integrally arranged on one side of the hydraulic valve block, and the ultrahigh pressure filter 3 is fixedly connected with the hydraulic valve block through a connecting rib plate, so that a medium entering a hydraulic system can be cleaned, a working medium can be kept clean, a tested component or a hydraulic component is prevented from being polluted, the filter has a function of blocking a signal, the state of the signal transmitter can be monitored remotely, and the safety of the system is ensured;
one end of the ultrahigh pressure filter 3 is provided with a one-way valve 4, and one side of the hydraulic valve block is provided with an ultrahigh pressure stop reversing valve 5;
the ultrahigh pressure stop reversing valve 5, the one-way valve 4 and the hydraulic valve block are directly connected with the cutting sleeve hard pipe through the connector, the one-way valve 4 has reliable performance, can ensure that the passing oil is not leaked inwards, prevent pressure reaction, can well maintain pressure in the reverse leakage of nearly 0, and can realize good pressure maintaining effect;
the ultrahigh pressure stop reversing valve 5 adopts a 2-bit 2-electricity-supply control valve, so that the on-off of the ultrahigh pressure stop reversing valve can be remotely controlled, the pressure relief effect of the system is realized when the ultrahigh pressure stop reversing valve 5 is opened, the pressure maintaining is realized when the ultrahigh pressure stop reversing valve is closed, the aviation red oil ultrahigh pressure power station adopts normally open electromagnetic control, and when the valve is powered off or fails and has a power failure, the system can automatically relieve the pressure, so that the test safety of the aviation red oil ultrahigh pressure power station is ensured;
the top of the hydraulic valve block is provided with the energy accumulator 6, the ultrahigh pressure energy accumulator 6 is directly arranged on the hydraulic valve block, the system can play a role in stabilizing the system pressure, meanwhile, the system can also be used for supplementing oil leakage of the system to keep constant pressure during shutdown, and when the tested components have smaller leakage quantity, the system can be stopped for pressure maintaining through the energy accumulator 6 so as to achieve the purpose of saving the electric power cost;
the back pressure valve 7 is arranged at the top of the hydraulic valve block corresponding to one side of the proportional overflow valve 2, the back pressure valve 7 adopts plate type mounting back pressure, and the back pressure valve is directly arranged on the hydraulic valve block through a fastener, so that the oil return pressure value of a tested component can be regulated;
a first pressure gauge 10 is arranged on one side of the installation panel, a second pressure gauge 9 is arranged on one side of the installation panel corresponding to the top of the first pressure gauge 10, a second ultrahigh pressure ball valve 8 is arranged at the bottom of the hydraulic valve block, a first ultrahigh pressure ball valve 20 is arranged at the top of the hydraulic valve block, and a pressure sensor 11 is arranged at the top of the hydraulic valve block;
the plate heat exchanger 12 is arranged on one side of the oil tank 16, the inlet of the plate heat exchanger 12 is connected with the oil return port of the power station, the outlet of the plate heat exchanger 12 is connected with the oil return filter 13, and the other two interfaces of the plate heat exchanger 12 are cold water interfaces, so that the condition that the working medium temperature of the system is too high is avoided, and the tested medium can reach the aim of cleaning through the oil return filter;
the oil temperature is prevented from being too high, the top end of the oil tank 16 is provided with an oil return filter 13, and the oil return filter 13 further removes solid pollutants of a hydraulic system working medium and has the function of blocking and signaling;
the oil tank 16 internally mounted has oil absorption filter 14, and the liquid level thermometer 15 is installed to one side of oil tank 16, and floater liquid level switch 17 is installed on the top of oil tank 16, and temperature sensor 18 is installed to installation panel one side, and air cleaner 19 is installed on the top of oil tank 16, and removable base 21 is installed to the oil tank 16 bottom.
The temperature sensor 18 and the floating ball liquid level switch 17 respectively monitor whether the temperature and the liquid level of the medium in the oil tank 16 meet the requirements;
the plate heat exchanger 12 is connected with an oil return filter 13 at the top end of an oil tank 16 through a clamping sleeve hard pipe, and the plate heat exchanger 12 is connected with a hydraulic valve block through the clamping sleeve hard pipe;
the ultrahigh pressure filter 3, the proportional overflow valve 2, the pressure sensor 11, the energy accumulator 6, the first ultrahigh pressure ball valve 20, the second ultrahigh pressure ball valve 8 and the back pressure valve 7 on the hydraulic valve block are connected through a fastener and a hydraulic joint;
the second pressure gauge 9 and the first pressure gauge 10 are kept connected with the hydraulic valve block through pressure measuring connectors, the ultrahigh pressure stop reversing valve 5 is connected with the oil tank 16 through connectors and flexible clamping sleeve hard pipes, and the ultrahigh pressure stop reversing valve 5 is connected with the hydraulic valve block through connectors and flexible clamping sleeve hard pipes.
The ultrahigh pressure stop reversing valve 5, the one-way valve 4 and the hydraulic valve block are connected through a connector and a clamping sleeve hard pipe.
The hydraulic valve bank is composed of a one-way valve 4, an ultrahigh pressure filter 3, a proportional overflow valve 2, a second pressure gauge 9, a first pressure gauge 10, a pressure sensor 11, an ultrahigh pressure stop reversing valve 5, an energy accumulator 6, a first ultrahigh pressure ball valve 20, a second ultrahigh pressure ball valve 8 and a back pressure valve 7.
This novel aviation red oil super high voltage power station compact structure, rationally distributed, this equipment of further convenient outside control and operation, power station oil tank 16 upper cover plate still installs a middle switch board, makes things convenient for the long-range wiring of customer scene.
Finally, it should be noted that: the foregoing is merely a preferred example of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (6)
1. An aviation red oil ultrahigh pressure power station, includes oil tank (16), its characterized in that: the hydraulic oil tank is characterized in that an ultrahigh pressure pump set (1) is arranged at the top of the oil tank (16), a mounting panel is arranged at the top of the oil tank (16), a hydraulic valve block is mounted at the top of the mounting panel, a proportional overflow valve (2) is mounted at the top of the hydraulic valve block, an ultrahigh pressure filter (3) is integrally mounted at one side of the hydraulic valve block, a one-way valve (4) is mounted at one end of the ultrahigh pressure filter (3), an ultrahigh pressure stop reversing valve (5) is mounted at one side of the hydraulic valve block, an energy accumulator (6) is mounted at the top of the hydraulic valve block, a back pressure valve (7) is mounted at one side of the hydraulic valve block corresponding to the proportional overflow valve (2), a first pressure gauge (10) is mounted at one side of the mounting panel, a second pressure gauge (9) is mounted at one side of the mounting panel corresponding to the top of the first pressure gauge, a second ultrahigh pressure ball valve (8) is mounted at the bottom of the hydraulic valve block, a first ultrahigh pressure ball valve (20) is mounted at the top of the hydraulic valve block, and a pressure sensor (11) is mounted at the top of the hydraulic valve block;
plate heat exchanger (12) are installed to oil tank (16) one side, oil return filter (13) are installed on the top of oil tank (16), oil absorption filter (14) are installed to oil tank (16) internally mounted, liquid level thermometer (15) are installed to one side of oil tank (16), floater liquid level switch (17) are installed on the top of oil tank (16), temperature sensor (18) are installed to mounting panel one side, air cleaner (19) are installed on oil tank (16) top, removable base (21) are installed to oil tank (16) bottom.
2. The aviation red oil ultrahigh pressure power station according to claim 1, wherein the plate heat exchanger (12) is connected with an oil return filter (13) at the top end of an oil tank (16) through a clamping sleeve hard pipe, and the plate heat exchanger (12) is connected with a hydraulic valve block through the clamping sleeve hard pipe;
the volume of the oil tank (16) is 200L-300L.
3. The aviation red oil ultrahigh pressure power station according to claim 1, wherein the ultrahigh pressure filter (3), the proportional overflow valve (2), the pressure sensor (11), the energy accumulator (6), the first ultrahigh pressure ball valve (20), the second ultrahigh pressure ball valve (8) and the back pressure valve (7) on the hydraulic valve block are connected through fasteners and hydraulic joints;
the second pressure gauge (9) and the first pressure gauge (10) are kept connected with the hydraulic valve block through pressure measuring connectors, the ultrahigh pressure stop reversing valve (5) is connected with the oil tank (16) through connectors and bendable clamping sleeve hard pipes, and the ultrahigh pressure stop reversing valve (5) is connected with the hydraulic valve block through connectors and bendable clamping sleeve hard pipes.
4. The aviation red oil ultrahigh pressure power station according to claim 1, wherein the ultrahigh pressure stop reversing valve (5), the one-way valve (4) and the hydraulic valve block are connected through a connector and a clamping sleeve hard pipe.
5. The aviation red oil ultrahigh-pressure power station according to claim 1, wherein the one-way valve (4), the ultrahigh-pressure filter (3), the proportional overflow valve (2), the second pressure gauge (9), the first pressure gauge (10), the pressure sensor (11), the ultrahigh-pressure stop reversing valve (5), the energy accumulator (6), the first ultrahigh-pressure ball valve (20), the second ultrahigh-pressure ball valve (8) and the back pressure valve (7) form a hydraulic valve group.
6. An aviation red oil ultrahigh-pressure power station according to claim 5, characterized in that the outlet of the ultrahigh-pressure pump unit (1) is connected to a hydraulic valve block on an oil tank (16) through a hose, and the inlet of the ultrahigh-pressure pump unit (1) is connected with an oil absorption filter (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320442359.9U CN219691887U (en) | 2023-03-10 | 2023-03-10 | Aviation red oil ultrahigh-pressure power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320442359.9U CN219691887U (en) | 2023-03-10 | 2023-03-10 | Aviation red oil ultrahigh-pressure power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219691887U true CN219691887U (en) | 2023-09-15 |
Family
ID=87970835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320442359.9U Active CN219691887U (en) | 2023-03-10 | 2023-03-10 | Aviation red oil ultrahigh-pressure power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219691887U (en) |
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2023
- 2023-03-10 CN CN202320442359.9U patent/CN219691887U/en active Active
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