CN216770951U - Valve air tightness test bed - Google Patents
Valve air tightness test bed Download PDFInfo
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- CN216770951U CN216770951U CN202122427482.7U CN202122427482U CN216770951U CN 216770951 U CN216770951 U CN 216770951U CN 202122427482 U CN202122427482 U CN 202122427482U CN 216770951 U CN216770951 U CN 216770951U
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Abstract
The utility model discloses a valve air tightness test stand, and relates to a detection device, which comprises a stand body, wherein an air source device is fixedly arranged in the stand body, a first pressing block and a driving structure are fixedly arranged on the air flow observing device, a second pressing block which can be driven by the driving structure to do linear reciprocating motion relative to the first pressing block is fixedly arranged on the action end of the driving structure, air holes are respectively formed in the first pressing block and the second pressing block, the air holes in the first pressing block are connected with an air source device through a first guide pipe, a normally closed first two-position three-way electromagnetic valve is arranged on the first guide pipe, a first air flow observing device is communicated with the first guide pipe between the first two-position three-way electromagnetic valve and the corresponding air holes through a second guide pipe, a normally closed second two-position three-way electromagnetic valve is arranged on the second guide pipe, the air holes in the second pressing block are connected with a second air flow observing device through a third guide pipe, and a third two-position three-way electromagnetic valve is arranged on the third guide pipe; the utility model can effectively detect the air tightness of the valve.
Description
Technical Field
The utility model relates to a detection device, in particular to a valve air tightness test device.
Background
Before the valve leaves the factory, the air sealing parameters of the valve need to be tested, and the valve can leave the factory after the valve is tested to be free of leakage. Most existing equipment are complex in structure, complex in operation, multiple in testing links, difficult to operate by operators, low in working efficiency and extremely difficult to test mass valves, and especially air tightness is tested.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a valve air tightness test bed to solve the technical problem that the valve air tightness test in the prior art is difficult.
The utility model is realized by the following technical scheme:
a valve air tightness test stand comprises a stand body, wherein an air source device is fixedly installed in the stand body, a first pressing block and a driving structure are fixedly installed on the air source device, a second pressing block which can be driven by the driving structure to do linear reciprocating motion relative to the first pressing block is fixedly installed on the driving structure, air holes are respectively formed in the first pressing block and the second pressing block, when a valve body is clamped by the first pressing block and the second pressing block, an inner cavity of the valve body can be connected with an external pipeline through the two air holes, the air holes in the first pressing block are connected with the air source device through a first guide pipe, a normally closed first two-position three-way electromagnetic valve is further installed on the first guide pipe, a first airflow observation device is further communicated with the first guide pipe between the first two-position three-way electromagnetic valve and the corresponding air holes through a second guide pipe, and a normally closed second two-position three-way electromagnetic valve is further installed on the second guide pipe, and the air hole on the second pressing block is connected with a second airflow observation device through a third guide pipe, and a third two-position three-way electromagnetic valve is arranged on the third guide pipe.
Further, an input end and an output end of a two-way shunt seat are connected in series on a first guide pipe between the first two-position three-way electromagnetic valve and the first pressing block, and the input end of the two-way shunt seat faces the first two-position three-way electromagnetic valve; the connecting point of the second conduit and the first conduit is positioned between the two-way flow dividing seat and the first pressing block, and the other output end of the two-way flow dividing seat is communicated with the air inlet pressure gauge through a fourth conduit.
Further, a fifth conduit is communicated with a second conduit between the second two-position three-way electromagnetic valve and the first conduit, and a normally-closed fourth two-position three-way electromagnetic valve is mounted on the fifth conduit.
Further, an input end and an output end of a three-way shunt seat are connected in series on a third guide pipe between the third two-position three-way electromagnetic valve and the second pressure block, the input end of the three-way shunt seat faces the second pressure block, and a second output end of the three-way shunt seat is communicated with the test pressure gauge through a sixth guide pipe; and a third output end of the three-way flow distribution seat is connected with a seventh guide pipe, and a fifth normally-closed two-position three-way electromagnetic valve is installed on the seventh guide pipe.
Further, a first Y-shaped filter is further connected in series on a second conduit between the second two-position three-way electromagnetic valve and the two-way shunt seat, a connection point of a fifth conduit and the second conduit is located between the first Y-shaped filter and the second two-position three-way electromagnetic valve, and a second Y-shaped filter is further connected in series on a third conduit between the three-way shunt seat and the second pressure block.
And a sixth normally closed two-position three-way electromagnetic valve is further arranged, the sixth two-position three-way electromagnetic valve is connected in series on the eighth conduit, and one end of the eighth conduit is respectively communicated with the third conduit between the three-way flow dividing seat and the third two-position three-way electromagnetic valve and the third conduit between the third two-position three-way electromagnetic valve and the second airflow observing device.
Furthermore, the end part of the fifth conduit departing from the first two-position three-way electromagnetic valve and the end part of the seventh conduit departing from the three-way flow dividing seat are respectively communicated with one input end of the flow collecting seat, and the output end of the flow collecting seat is connected with the filter.
Further, the air source device, the driving structure and the six two-position three-way electromagnetic valves are respectively in signal connection with the controller.
Further, be equipped with the breach and the breach bottom of indent on the front end of rack body middle part for the horizontally operating surface, first briquetting fixed mounting is provided with the second briquetting directly over and at the operating surface top, the top of second briquetting with install the drive structural connection at rack body top, intake pressure table, test pressure table, two air current viewing device and controller are installed respectively on the terminal surface before the rack body top.
Further, install the choke valve of installing on the rack body lateral wall on the third pipe between third two three solenoid valves and the second air current viewing device, the tie point of the third pipe between eighth pipe and third two three solenoid valves and the second air current viewing device is in between choke valve and the second air current viewing device, it has a plurality of different ring packing of internal diameter to equallyd divide evenly respectively on the lateral wall of first briquetting and second briquetting orientation each other.
Compared with the prior art, the utility model has the following advantages:
according to the valve air tightness test bed provided by the utility model, the plurality of two-position three-way electromagnetic valves and the airflow observing device are arranged, so that the airflow direction in the valve can be effectively detected, the side where a leak point is located in the valve is judged, the judgment efficiency is improved, the equipment is simple to operate, and the defect that the traditional equipment is difficult to operate is overcome.
Drawings
FIG. 1 is a schematic structural diagram of a valve gas tightness test bed provided in an embodiment;
fig. 2 is a schematic diagram illustrating connection between each gas circuit and a control circuit in the valve airtightness test bed according to the embodiment.
In the figure: 1. a rack body; 2. a gas source device; 3. a first pressing block; 4. a drive structure; 5. a second pressing block; 6. air holes; 7. a first conduit; 8. a first two-position three-way solenoid valve; 9. a second conduit; 10. a first airflow observing device; 11. a second two-position three-way electromagnetic valve; 12. a third conduit; 13. a third two-position three-way electromagnetic valve; 14. a two-way shunt base; 15. a fourth conduit; 16. an air intake pressure gauge; 17. a fifth conduit; 18. a fourth two-position three-way electromagnetic valve; 19. a first Y-strainer; 20. a second Y-strainer; 21. A three-way shunt base; 22. a sixth conduit; 23. testing a pressure gauge; 24. a seventh conduit; 25. a fifth two-position three-way electromagnetic valve; 26. a sixth two-position three-way electromagnetic valve; 27. an eighth conduit; 28. a manifold block; 29. a filter; 30. a controller; 31. a throttle valve; 32. an annular seal ring; 33. a second airflow observing device.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood 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.
Examples
Combine attached figure 1 and 2, this embodiment provides a valve gas tightness test platform, including rack body 1, rack body 1's structure can be for multiple, only need satisfy the functional requirement alright. In this embodiment, referring to fig. 1, in this embodiment, the rack body 1 is a cabinet structure having a rectangular parallelepiped shape, an inwardly concave notch is formed on a front end surface of a middle portion of the rack body, a bottom of the notch is a horizontal operation surface, so as to facilitate operation of equipment therein, and two sides of the notch are respectively provided with an upright post in this embodiment for supporting and connecting upper and lower ends thereof, so as to achieve a supporting purpose;
in order to facilitate the detection of the air tightness of the valve, in the embodiment, a first pressing block 3 and a second pressing block 5 are firstly arranged, the two pressing blocks are arranged towards each other, the first pressing block 3 is fixedly installed, the second pressing block 5 is installed on the rack body 1 through a driving structure 4, and the driving structure 4 can drive the second pressing block 5 to perform linear reciprocating motion towards the first pressing block 3, so that the valve placed between the two pressing blocks can be effectively clamped or unloaded; particularly, in order to perform air tightness detection on the valve, in this embodiment, air holes 6 are firstly formed in the first pressing block 3 and the second pressing block 5, wherein one end of each air hole 6 respectively penetrates through the corresponding pressing block towards the side wall of the other pressing block, and the other end penetrates through the other side wall of the corresponding pressing block, so that external air flow can enter the valve inner cavity between the two pressing blocks through one end of the air hole 6 and enter the valve inner cavity through the other end of the air hole, and the purpose of injecting air into the valve inner cavity is achieved;
meanwhile, in order to facilitate the operation of the device, in this embodiment, the first pressing block 3 is fixedly installed at the bottom of the notch, and the driving structure 4 is fixedly installed in the top end of the rack body 1, that is, in the rack body 1 above the top of the notch; the driving structure 4 is embodied as a hydraulic device in the embodiment, so as to be capable of stabilizing the up-down movement, and a second pressing block 5 is arranged below the driving structure, so as to be convenient for clamping the valve body between the two pressing blocks;
particularly, in order to achieve the purpose of detecting air tightness, in this embodiment, an end portion of the air hole 6 of the first pressing block 3, which is deviated from another pressing block, is connected to the air source device 2 fixedly installed at the bottom of the inner cavity of the rack body 1 through the first conduit 7, the air source device 2 is specifically a device such as an air pump installed in the rack body 1, the first conduit 7 is provided with a normally closed first two-position three-way electromagnetic valve 8, the first two-position three-way electromagnetic valve 8 and the first conduit 7 between the corresponding air holes 6 are further communicated with the first airflow observing device 10 through the second conduit 9, the second conduit 9 is further provided with a second two-position three-way electromagnetic valve 11, secondly, the air hole 6 of the second pressing block 5 is communicated with the second airflow observing device 33 through the third conduit 12, and the third conduit 12 is also communicated with the normally closed third two-position three-way electromagnetic valve 13.
Through the arrangement, the first two-position three-way electromagnetic valve 8 can effectively control the air supply of the air source device 2 to the valve cavity between the two pressing blocks through the first guide pipe 7, the valve keeps an open state before air supply, the first two-position three-way electromagnetic valve 8 is opened during air supply, air flow enters the valve cavity through the first guide pipe 7, meanwhile, the normally closed state of the second and third two-position three-way electromagnetic valves enables the air flow to be remained in the valve cavity, so that the purpose of inflation is achieved, after inflation is completed, the first two-position three-way electromagnetic valve 8 is closed, then the valve is operated to enable the valve to enter a closed state, then the second two-position three-way electromagnetic valve 11 or the third two-position three-way electromagnetic valve 13 is opened, one air flow on two sides of the valve core of the valve enters the corresponding air flow observation device through the corresponding guide pipe, violent disturbance can be generated due to large air flow at the beginning, and after the period of time, if discontinuous or continuous weak air flow can be generated, if the corresponding side part is unqualified in air tightness, otherwise, the other side of the valve is qualified, and the same operation is carried out for detection; the two airflow observation devices have the same structure, are both devices capable of observing airflow forms, and can achieve the purpose of judging whether the airflow is discharged or not and judging the discharge state of the airflow, specifically, in the embodiment, the two airflow observation devices are specifically of a structure formed by transparent plastic cups or glass cups, water or petroleum is contained in the two airflow observation devices, the bottom ends of the two airflow observation devices are respectively connected with the corresponding guide pipes, and meanwhile, the height of the pipe body of each guide pipe part is higher than that of liquid in the corresponding airflow observation device, so that the liquid is prevented from flowing backwards;
after the valve is inflated, the valve is closed to be in a closed state, then a second or third two-position three-way electromagnetic valve is opened, airflow on one side of the valve is enabled to flow into a corresponding airflow observation device through a corresponding pipeline, a series of bubbles are generated, and if small, continuous or discontinuous bubbles still exist after the bubbles are generated violently, the corresponding side is unqualified in air tightness; for example, when the gate valve is inspected, after the gate valve is filled with gas through the gas hole 6 and has a certain pressure, the first two-position three-way electromagnetic valve 8 is closed, then the gate valve is closed, and the second or third two-position three-way electromagnetic valve is opened, for example, when the second two-position three-way electromagnetic valve 11 is opened, the gas flow at the lower part firstly violently rushes into the gas flow observation device to generate a series of bubbles; similarly, the third two-position three-way electromagnetic valve 13 is opened, if a weak continuous bubble exists at the corresponding rear end, a corresponding leak point exists, and if the corresponding sealing surface is qualified; when the check valve is detected, the check valve is firstly inflated, then the check valve is closed, then the first two-position three-way electromagnetic valve 8 is closed, then the third two-position three-way electromagnetic valve 13 is opened to observe whether the rear end of the second airflow observation device 33 can generate continuous weak bubbles, if yes, a leak point exists, the air tightness is unqualified, and if not, the air tightness is qualified.
In particular, in order to facilitate observation of the pressure of the air flow in the flushing valve, in this embodiment, an input end and an output end of the two-way shunt seat 14 are connected in series to the first conduit 7 between the first two-position three-way solenoid valve 8 and the first pressing block 3, the input end of the two-way shunt seat 14 faces the first two-position three-way solenoid valve 8, a connection point of the second conduit 9 and the first conduit 7 is located on the second conduit 9 between the two-way shunt seat 14 and the first pressing block 3, and the output end of the other end of the two-way shunt seat 14 is communicated with the air intake pressure gauge 16 through the fourth conduit 15, so as to detect the flushing pressure.
Particularly, in order to cause severe disturbance in the corresponding airflow observing device when the second or third two-position three-way electromagnetic valve is opened, so that liquid in the corresponding airflow observing device overflows due to overlarge pressure of the airflow of the valve, in this embodiment, a fifth conduit 17 is communicated with the second conduit 9 between the second two-position three-way electromagnetic valve 11 and the first conduit 7, and a fourth two-position three-way electromagnetic valve 18 is installed on the fifth conduit 17, so that the fourth two-position three-way electromagnetic valve 18 can be opened first before the second two-position three-way electromagnetic valve 11 is opened, and further, pressure can be effectively relieved, and the second two-position three-way electromagnetic valve 11 is closed and opened after the opening, so that on one hand, the first airflow observing device 10 can be effectively prevented from being severely disturbed by the airflow, and whether a leak point exists can be judged;
similarly, in this embodiment, an input end and an output end of a three-way shunt seat 21 are connected in series on a third conduit 12 between a third two-position three-way electromagnetic valve 13 and a second pressure block 5, the input end of the three-way shunt seat 21 faces the second pressure block 5, the other output end of the three-way shunt seat 21 is communicated with a test pressure gauge 23 through a sixth conduit 22, so that the pressure in the valve can be detected, the third output end of the three-way shunt seat 21 is connected with a seventh conduit 24, the seventh conduit 24 is provided with a normally closed fifth two-position three-way electromagnetic valve 25, the pressure in the upper portion of the valve can be effectively relieved through the fifth two-position three-way electromagnetic valve 25, and the pressure in the valve can be observed through the test pressure gauge 23;
in particular, in order to avoid the impurities contained in the air flow, in this embodiment, a first Y-shaped filter 19 is further connected in series on the second conduit 9 between the second two-position three-way electromagnetic valve 11 and the two diversion seats, a connection point of the fifth conduit 17 and the second conduit 9 is located between the first Y-shaped filter 19 and the second two-position three-way electromagnetic valve 11, and a second Y-shaped filter 20 is further connected in series on the third conduit 12 between the three-position three-way diversion seat 21 and the second pressure block 5, so that the impurities in the air flow can be effectively filtered through the two Y-shaped filters.
In particular, in order to facilitate the detection when the air tightness of the stop valve is detected, in the present embodiment, a sixth two-position three-way electromagnetic valve 26, which is normally closed, is further provided, and is connected in series to the eighth conduit 27, and one end of the eighth conduit 27 is respectively communicated to the third conduit 12 between the three-way flow dividing seat 21 and the third two-position three-way electromagnetic valve 13, and the third conduit 12 between the third two-position three-way electromagnetic valve 13 and the second airflow observing device 33.
Through the above arrangement, when the stop valve is detected, after the stop valve is clamped by the first pressing block 3 and the second pressing block 5, the first two-position three-way electromagnetic valve 8 and the third two-position three-way electromagnetic valve 13 are opened, the air flow enters the valve inner cavity, the third two-position three-way electromagnetic valve 13 enters the second air flow observation device 33 to generate bubbles, then the stop valve is closed, the fifth two-position three-way electromagnetic valve 25 is opened to release the pressure and then is closed together with the third two-position three-way electromagnetic valve 13, then the sixth two-position three-way electromagnetic valve 26 is opened, whether bubbles are generated or not is observed, and whether leakage exists or not is judged.
In particular, in order to facilitate the control of the pressure relief air flow, in this embodiment, the end of the fifth conduit 17 facing away from the first two-position three-way solenoid valve 8 and the end of the seventh conduit 24 facing away from the three-way diverging seat 21 are respectively communicated with one input end of the collecting seat 28, the output end of the collecting seat 28 is communicated with the filter 29, and the air flows discharged from the two conduits can enter the filter 29 through the collector, thereby achieving the purpose of controlling the pressure relief air flow.
In particular, in order to control the equipment conveniently, the air source device 2, the driving structure 4 and the six two-position three-way electromagnetic valves are respectively in signal connection with the controller 30, so that the equipment can be controlled conveniently; meanwhile, the controller 30 is installed on the front end face of the top end of the rack body 1, the air source device 2, the driving structure 4 and the six two-position three-way electromagnetic valves are installed in the inner cavity of the rack body 1, and the two airflow observation devices and the two pressure gauges are installed on the front end face of the top end of the rack body 1, so that the equipment can be observed conveniently.
Specifically, a throttle valve 31 mounted on the side wall of the gantry body 1 is mounted on the third conduit 12 between the third two-position three-way solenoid valve 13 and the second airflow observing device 33, a connection point of the eighth conduit 27 and the third conduit 12 between the third two-position three-way solenoid valve 13 and the second airflow observing device 33 is located between the throttle valve 31 and the second airflow observing device 33, and annular seal rings 32 are respectively and uniformly embedded on the side walls of the first pressing block 3 and the second pressing block 5 facing each other, that is, a plurality of annular seal rings 32 with different inner diameters are embedded on the side wall of each pressing block facing the other pressing block.
Through setting up the discharge amount that choke valve 31 can effective control air current, and then avoid the liquid in the second air current viewing device 33 of violent disturbance, ring seal 32 can effectively seal the not unidimensional valve to the application scope of equipment has been improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A valve air tightness test stand comprises a stand body and is characterized in that an air source device is fixedly installed in the stand body, a first pressing block and a driving structure are fixedly installed on the air source device, a second pressing block which can be driven by the driving structure to do linear reciprocating motion relative to the first pressing block is fixedly installed on the action end of the driving structure, air holes are respectively formed in the first pressing block and the second pressing block, when a valve body is clamped by the first pressing block and the second pressing block, the inner cavity of the valve body can be connected with an external pipeline through the two air holes, the air holes in the first pressing block are connected with the air source device through a first guide pipe, a normally closed first two-position three-way electromagnetic valve is further installed on the first guide pipe, a first air flow observation device is further communicated on the first guide pipe between the first two-position three-way electromagnetic valve and the corresponding air holes through a second guide pipe, and a normally closed second three-way electromagnetic valve is further installed on the second guide pipe, and the air hole on the second pressing block is connected with a second airflow observation device through a third guide pipe, and a third two-position three-way electromagnetic valve is arranged on the third guide pipe.
2. The valve airtightness test bed according to claim 1, wherein an input end and an output end of the two-way shunt seat are connected in series to a first conduit between the first two-position three-way solenoid valve and the first pressure block, and the input end of the two-way shunt seat faces the first two-position three-way solenoid valve; the connecting point of the second conduit and the first conduit is positioned between the two-way flow dividing seat and the first pressing block, and the other output end of the two-way flow dividing seat is communicated with the air inlet pressure gauge through a fourth conduit.
3. The valve airtightness test bed according to claim 2, wherein a fifth conduit is communicated with a second conduit between the second two-position three-way solenoid valve and the first conduit, and a fourth normally closed two-position three-way solenoid valve is mounted on the fifth conduit.
4. The valve tightness test bed according to claim 3, wherein a third conduit between the third two-position three-way electromagnetic valve and the second pressure block is connected in series with an input end and an output end of a three-way flow distribution seat, the input end of the three-way flow distribution seat faces the second pressure block, and the second output end of the three-way flow distribution seat is communicated with the test pressure gauge through a sixth conduit; and a third output end of the three-way flow distribution seat is connected with a seventh guide pipe, and a fifth normally-closed two-position three-way electromagnetic valve is installed on the seventh guide pipe.
5. The valve airtightness test bed according to claim 4, wherein a first Y-shaped filter is further connected in series to a second conduit between the second two-position three-way solenoid valve and the two-way diverter seat, a connection point of a fifth conduit and the second conduit is located between the first Y-shaped filter and the second two-position three-way solenoid valve, and a second Y-shaped filter is further connected in series to a third conduit between the three-way diverter seat and the second pressure block.
6. The valve airtightness test bed according to claim 5, further comprising a sixth normally closed two-position three-way solenoid valve, wherein the sixth two-position three-way solenoid valve is connected in series to the eighth conduit, and one end of the eighth conduit is respectively communicated with a third conduit between the three-way flow dividing seat and the third two-position three-way solenoid valve, and a third conduit between the third two-position three-way solenoid valve and the second airflow observing device.
7. The valve tightness test bed according to claim 6, wherein the end of the fifth conduit facing away from the first two-position three-way solenoid valve and the end of the seventh conduit facing away from the three-way flow dividing seat are respectively communicated with one input end of a flow collecting seat, and the output end of the flow collecting seat is connected with a filter.
8. The valve tightness test bed according to claim 7, wherein the air source device, the driving structure and the six two-position three-way electromagnetic valves are respectively in signal connection with a controller.
9. The valve airtightness test bed according to claim 8, wherein an inward concave notch is formed in the front end of the middle portion of the bed body, the bottom of the notch is a horizontal operating surface, the first pressing block is fixedly mounted on the top of the operating surface, the second pressing block is arranged right above the first pressing block, the top of the second pressing block is connected with a driving structure mounted on the top of the bed body, and the air inlet pressure gauge, the test pressure gauge, the two airflow observing devices and the controller are respectively mounted on the front end face of the top end of the bed body.
10. The valve airtightness test bed according to claim 9, wherein a throttle valve mounted on the side wall of the bed body is mounted on a third conduit between the third two-position three-way solenoid valve and the second airflow observing device, a connection point of the eighth conduit and the third conduit between the third two-position three-way solenoid valve and the second airflow observing device is located between the throttle valve and the second airflow observing device, and a plurality of annular seal rings with different inner diameters are respectively and uniformly embedded in side walls of the first pressing block and the second pressing block facing each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122427482.7U CN216770951U (en) | 2021-10-09 | 2021-10-09 | Valve air tightness test bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122427482.7U CN216770951U (en) | 2021-10-09 | 2021-10-09 | Valve air tightness test bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216770951U true CN216770951U (en) | 2022-06-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122427482.7U Active CN216770951U (en) | 2021-10-09 | 2021-10-09 | Valve air tightness test bed |
Country Status (1)
| Country | Link |
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| CN (1) | CN216770951U (en) |
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2021
- 2021-10-09 CN CN202122427482.7U patent/CN216770951U/en active Active
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| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 245000, Meilin Avenue, Huangshan City Economic Development Zone, Anhui, 55 Patentee after: Anhui Tunxi High Pressure Valve Co.,Ltd. Address before: 245000, Meilin Avenue, Huangshan City Economic Development Zone, Anhui, 55 Patentee before: ANHUI TUNXI HIGH PRESSURE VALVE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |