CN218883047U - Piston type plug valve adjusting device - Google Patents
Piston type plug valve adjusting device Download PDFInfo
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- CN218883047U CN218883047U CN202222552041.4U CN202222552041U CN218883047U CN 218883047 U CN218883047 U CN 218883047U CN 202222552041 U CN202222552041 U CN 202222552041U CN 218883047 U CN218883047 U CN 218883047U
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- piston
- plug valve
- end cover
- rod
- cylinder
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Abstract
The utility model discloses a plug valve adjusting device of piston, including the plug valve body, be provided with the plug case of opening and close usefulness in the plug valve body, the plug case links to each other with the valve rod, and plug valve body upper end is provided with the control box, and in the control box was inserted to the valve rod, control box one side was provided with and carries out rotation drive's piston cylinder to the valve rod, was provided with multistage inclosed sliding piston in the piston cylinder, and the piston is the dish dress structure, and the piston includes outer slip enclosed construction and interior installation enclosed construction. The utility model discloses a piston cylinder passes through the piston cylinder and realizes the flexible drive to the piston rod, and the airtight structure of sliding outward through the piston outer wall realizes and the sealed slip of cylinder, through the interior installation airtight structure of piston inner wall realize with the piston rod between sealed, guarantee the sealed between the piston cylinder control left side chamber, the piston cylinder control right side chamber, the utility model discloses a valve rod pivoted accuracy has been guaranteed to the airtight slip of piston, has guaranteed the pivoted stability of shift fork.
Description
Technical Field
The utility model belongs to the technical field of the plug valve is adjusted, concretely relates to plug valve adjusting device of piston.
Background
The plug valve is often used for cutting off, lifting and distributing and changing the flowing direction of a medium in the design and use of a pipe network, can be well used for various pipe network application scenes, and meanwhile, the plug valve is rapid to open and close and convenient to operate.
The main opening and closing piece of the plug valve is a columnar plug valve core, and the plug valve core is driven to rotate through the rotation of the valve rod, so that the opening and closing of the plug valve are realized.
However, in the large-diameter environment such as an urban pipe network and the like, and under the condition that a plurality of valves are arranged, if an operator works, the management and the operation efficiency are greatly influenced.
Disclosure of Invention
The utility model discloses a solve the problem that prior art exists and provide, its purpose provides a plug valve adjusting device of piston.
The technical scheme of the utility model is that: the utility model provides a plug valve adjusting device of piston, includes the plug valve body, be provided with the plug case of opening and close usefulness in the plug valve body, the plug case links to each other with the valve rod, plug valve body upper end is provided with the control box, the valve rod inserts in the control box, control box one side is provided with carries out rotation drive's piston cylinder to the valve rod, be provided with the inclosed sliding piston of multistage in the piston cylinder.
Furthermore, the piston is of a disc-mounted structure and comprises an outer sliding sealing structure and an inner mounting sealing structure.
Further, the piston cylinder comprises a cylinder barrel, and the piston slides along the inner wall of the cylinder barrel in a sealing mode.
Furthermore, the outer sliding sealing structure comprises a No. I sealing groove and a No. II sealing groove which are arranged on the outer wall of the piston, a deep sealing ring is arranged in the No. I sealing groove, and a flat sealing ring is arranged in the No. II sealing groove.
Furthermore, the deep sealing ring is larger than the flat sealing ring in radial width, the flat sealing ring is larger than the deep sealing ring in axial width, and the combination of the deep sealing ring and the flat sealing ring realizes the stable sliding of the piston in a sealing way.
Furthermore, the inner ring of the piston is connected with the step head of the piston rod, and the piston drives the piston rod to slide left and right.
Furthermore, an external thread is formed at the step head of the piston rod, and the step head penetrates through the piston and then is screwed with the connecting nut, so that the piston and the piston rod are fixed.
Furthermore, the inner installation sealing structure comprises a No. III sealing groove and a No. IV sealing groove which are formed in the inner wall of the piston, an inner sealing ring A is arranged in the No. III sealing groove, and an inner sealing ring B is arranged in the No. IV sealing groove.
Furthermore, a sliding block is arranged in the control box, and the piston rod drives the sliding block to slide.
Furthermore, a connecting sliding rod is arranged at the upper end of the sliding block, a guide groove is formed in the shifting fork, the connecting sliding rod slides in the guide groove to drive the shifting fork to rotate, the shifting fork is sleeved on the valve rod, and the shifting fork drives the valve rod.
The utility model discloses a piston cylinder passes through the piston cylinder and realizes the flexible drive to the piston rod, the outer slip enclosed construction through piston outer wall realize with the sealed slip of cylinder, through the interior installation enclosed construction of piston inner wall realize with the piston rod between sealed, guarantee sealed between the left chamber of piston cylinder control, the piston cylinder control right side chamber, the utility model discloses an airtight slip of piston has guaranteed the pivoted stability of shift fork, has guaranteed valve rod pivoted accuracy.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an assembly view of the fork of the present invention;
FIG. 3 is a schematic view of the assembly of the piston of the present invention;
wherein:
1. urban water supply upstream end 2 urban water supply downstream end
3. Cock valve body 4 cock valve core
5. Valve rod 6 pressure water control channel
7. Piston 8 controls the left chamber channel
9. Solenoid valve A10 control line A
11. Piston cylinder control left cavity 12 control line B
13. The electromagnetic valve B14 controls the right cavity channel
15. Piston cylinder control right cavity 16 PCB control box
17. Communication network A18 control line C
19. Left chamber exhaust control channel 20 exhaust solenoid valve A
21. Control line D22 exhaust solenoid valve B
23. Valve angle sensor of right cavity emptying control channel 24
25. Communication network B26 upper computer
27. Communication network C28 mobile control terminal
29. Shifting fork 30 slide block
31. Piston rod 32 piston cylinder
33. Deep seal 34 flat seal ring
35. Inner seal ring A36 and inner seal ring B
37. The coupling nut 38 is headed.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples:
as shown in fig. 1 to 3, a plug valve adjusting device of piston type comprises a plug valve body 3, a plug valve core 4 for opening and closing is arranged in the plug valve body 3, the plug valve core 4 is connected with a valve rod 5, a control box is arranged at the upper end of the plug valve body 3, the valve rod 5 is inserted into the control box, a piston cylinder 32 for rotationally driving the valve rod 5 is arranged on one side of the control box, and a multi-stage closed sliding piston 7 is arranged in the piston cylinder 32.
The piston 7 is of a disc-mounted structure, and the piston 7 comprises an outer sliding sealing structure and an inner mounting sealing structure.
The piston cylinder 32 comprises a cylinder barrel, and the piston 7 slides along the inner wall of the cylinder barrel in a sealing manner.
Outer slip airtight structure includes No. I seal groove and No. II seal groove of 7 outer walls of piston departments, be provided with dark sealing washer 33 in No. I seal groove, be provided with flat sealing washer 34 in No. II seal grooves.
The deep sealing ring 33 is wider than the flat sealing ring 34 in the radial direction, the flat sealing ring 34 is wider than the deep sealing ring 33 in the axial direction, and the deep sealing ring 33 and the flat sealing ring 34 are combined to realize the stable sealing sliding of the piston 7.
The inner ring of the piston 7 is connected with the step head of the piston rod 31, and the piston 7 drives the piston rod 31 to slide left and right.
An external thread is formed at the step head of the piston rod 31, and the step head penetrates through the piston 7 and then is screwed with the connecting nut 37, so that the piston 7 and the piston rod 31 are fixed.
The inner installation sealing structure comprises a No. III sealing groove and a No. IV sealing groove which are formed in the inner wall of the piston 7, an inner sealing ring A35 is arranged in the No. III sealing groove, and an inner sealing ring B36 is arranged in the No. IV sealing groove.
A sliding block 30 is arranged in the control box, and the piston rod 31 drives the sliding block 30 to slide.
The upper end of the sliding block 30 is provided with a connecting sliding rod, a guide groove is formed in the shifting fork 29, the connecting sliding rod slides in the guide groove, so that the shifting fork 29 is driven to rotate, the shifting fork 29 is sleeved on the valve rod 5, and the shifting fork 29 drives the valve rod 5.
Specifically, the piston cylinder 32 includes a hollow cylindrical cylinder barrel, a left end cap is arranged at one end of the cylinder barrel, a right end cap is arranged at the other end of the cylinder barrel, the left end cap and the right end cap are connected, and the cylinder barrel is clamped and fixed between the left end cap and the right end cap.
Specifically, a pipe threaded hole is formed in the left end cover, the pipe threaded hole is opposite to the piston rod 31, a top 38 is arranged in the pipe threaded hole, and the top 38 extends out of the left end cover, so that collision of the piston rod 31 on the left end cover is avoided.
And the left end cover and the right end cover are respectively provided with an inner convex part towards one side of the inner part of the cylinder barrel, the inner convex parts are consistent with the inner diameter of the cylinder barrel, and the inner convex parts are inserted into the cylinder barrel.
The end faces of the left end cover and the right end cover are close to the inner convex portions to form end face seal grooves, annular seal rings are arranged in the end face seal grooves, and the two ends of the cylinder barrel are sealed by the annular seal rings.
Specifically, the shift fork 29 is fixed to an outer wall of the valve stem 5, and the valve stem 5 rotates along with the rotation of the shift fork 29.
Specifically, the left side of the piston 7 and the inner wall of the piston cylinder 32 enclose to form a piston cylinder control left cavity 11, and the right side of the piston 7 and the inner wall of the piston cylinder 32 enclose to form a piston cylinder control right cavity 15.
Specifically, the right end cover of the piston cylinder 32 and the control box are fixed through a connecting bolt.
The right end cover of the piston cylinder 32 is provided with a threaded counter bore, a through hole is correspondingly formed in the control box, and a connecting bolt penetrates through the through hole and is screwed into the threaded counter bore.
As the connection of the plug valve body 3, the structure is as follows:
the liquid inlet cavity of the plug valve body 3 is communicated with the urban water supply upstream end 1, and the liquid outlet cavity of the plug valve body 3 is communicated with the urban water supply downstream end 2.
The plug valve body 3 is connected with the urban water supply upstream end 1 and the urban water supply downstream end 2 through flanges.
As the drive of the piston 7 in the piston cylinder 32, the specific structure is as follows:
an external through hole is formed in the outer wall of a liquid inlet cavity of the plug valve body 3 and communicated with the liquid inlet cavity, and a control assembly is arranged between the external through hole and the piston cylinder control left cavity 11 and between the external through hole and the piston cylinder control right cavity 15.
Yet another embodiment
The utility model provides a plug valve adjusting device of piston, includes plug valve body 3, be provided with the plug case 4 of opening and close usefulness in the plug valve body 3, plug case 4 links to each other with valve rod 5, 3 upper ends of plug valve body are provided with the control box, valve rod 5 inserts in the control box, control box one side is provided with carries out rotation drive's piston cylinder 32 to valve rod 5, be provided with multistage inclosed sliding piston 7 in the piston cylinder 32.
The piston 7 is of a disc-mounted structure, and the piston 7 comprises an outer sliding sealing structure and an inner mounting sealing structure.
The piston cylinder 32 comprises a cylinder barrel, and the piston 7 slides along the inner wall of the cylinder barrel in a sealing manner.
Outer slip confined structure includes No. I seal groove and No. II seal groove of 7 outer walls departments of piston, be provided with dark sealing washer 33 in No. I seal groove, be provided with flat sealing washer 34 in No. II seal grooves.
The deep sealing ring 33 is larger than the flat sealing ring 34 in radial width, the flat sealing ring 34 is larger than the deep sealing ring 33 in axial width, and the deep sealing ring 33 and the flat sealing ring 34 are combined to realize the sealed stable sliding of the piston 7.
The inner ring of the piston 7 is connected with the step head of the piston rod 31, and the piston 7 drives the piston rod 31 to slide left and right.
An external thread is formed at the stepped head of the piston rod 31, and the stepped head penetrates through the piston 7 and then is screwed with the connecting nut 37, so that the piston 7 and the piston rod 31 are fixed.
The inner installation sealing structure comprises a No. III sealing groove and a No. IV sealing groove which are formed in the inner wall of the piston 7, an inner sealing ring A35 is arranged in the No. III sealing groove, and an inner sealing ring B36 is arranged in the No. IV sealing groove.
A sliding block 30 is arranged in the control box, and the piston rod 31 drives the sliding block 30 to slide.
The upper end of the sliding block 30 is provided with a connecting sliding rod, a guide groove is formed in the shifting fork 29, the connecting sliding rod slides in the guide groove, so that the shifting fork 29 is driven to rotate, the shifting fork 29 is sleeved on the valve rod 5, and the shifting fork 29 drives the valve rod 5.
Specifically, the piston cylinder 32 comprises a hollow cylindrical cylinder barrel, a left end cover is arranged at one end of the cylinder barrel, a right end cover is arranged at the other end of the cylinder barrel, the left end cover and the right end cover are connected, and the cylinder barrel is clamped and fixed between the left end cover and the right end cover.
Specifically, a pipe threaded hole is formed in the left end cover, the pipe threaded hole is opposite to the piston rod 31, a top 38 is arranged in the pipe threaded hole, and the top 38 extends out of the left end cover, so that collision of the piston rod 31 on the left end cover is avoided.
And the left end cover and the right end cover are respectively provided with an inner convex part towards one side of the inner part of the cylinder barrel, the inner convex parts are consistent with the inner diameter of the cylinder barrel, and the inner convex parts are inserted into the cylinder barrel.
The end face of the left end cover and the end face of the right end cover are close to the inner convex portions to form end face seal grooves, annular seal rings are arranged in the end face seal grooves, and the two ends of the cylinder barrel are sealed by the annular seal rings.
Specifically, the shift fork 29 is fixed to an outer wall of the valve stem 5, and the valve stem 5 rotates along with the rotation of the shift fork 29.
Specifically, the left side of the piston 7 and the inner wall of the piston cylinder 32 enclose to form a piston cylinder control left cavity 11, and the right side of the piston 7 and the inner wall of the piston cylinder 32 enclose to form a piston cylinder control right cavity 15.
Specifically, the right end cover of the piston cylinder 32 and the control box are fixed through a connecting bolt.
The right end cover of the piston cylinder 32 is provided with a threaded counter bore, a through hole is correspondingly formed in the control box, and a connecting bolt penetrates through the through hole and is screwed into the threaded counter bore.
As the connection of the plug valve body 3, the structure is as follows:
the liquid inlet cavity of the plug valve body 3 is communicated with the urban water supply upstream end 1, and the liquid outlet cavity of the plug valve body 3 is communicated with the urban water supply downstream end 2.
The plug valve body 3 is connected with the urban water supply upstream end 1 and the urban water supply downstream end 2 through flanges.
As the driving of the piston 7 in the piston cylinder 32, the specific structure is as follows:
an external through hole is formed in the outer wall of a liquid inlet cavity of the plug valve body 3 and communicated with the liquid inlet cavity, and a control assembly is arranged between the external through hole and the piston cylinder control left cavity 11 and between the external through hole and the piston cylinder control right cavity 15.
Specifically, the left side of the piston 7 and the inner wall of the piston cylinder 32 enclose to form a piston cylinder control left cavity 11, and the right side of the piston 7 and the inner wall of the piston cylinder 32 enclose to form a piston cylinder control right cavity 15.
The control assembly comprises a pressure water control channel 6 communicated with an external through hole, and the pressure water control channel 6 is communicated with an electromagnetic valve A9 and an electromagnetic valve B13.
Specifically, a left control cavity channel 8 is formed at the left end cover of the piston cylinder 32, a right control cavity channel 14 is formed at the right end cover of the piston cylinder 32, the electromagnetic valve A9 is communicated with the left control cavity channel 8, and the electromagnetic valve B13 is communicated with the right control cavity channel 14.
Specifically, the control left cavity channel 8 is communicated with the piston cylinder control left cavity 11, and the control right cavity channel 14 is communicated with the piston cylinder control right cavity 15.
Specifically, a left cavity emptying control channel 19 is formed at the left end cover of the piston cylinder 32, and a right cavity emptying control channel 23 is formed at the right end cover of the piston cylinder 32.
Specifically, the left cavity emptying control channel 19 is communicated with an emptying electromagnetic valve a20, the right cavity emptying control channel 23 is communicated with an emptying electromagnetic valve B22, and the other ends of the emptying electromagnetic valve a20 and the emptying electromagnetic valve B22 are both emptied.
As the connection of the electromagnetic valve and the emptying electromagnetic valve, the structure is as follows:
the control box is provided with a valve angle sensor 24, the valve angle sensor 24 detects the rotation angle of the valve rod 5, and the valve angle sensor 24 is of a commercially available structure.
Specifically, the electromagnetic valve A9 is connected with a control line a10, and the electromagnetic valve B13 is connected with a control line B12.
Specifically, the exhaust solenoid valve a20 is connected to the control line C18, and the exhaust solenoid valve B22 is connected to the control line D21.
The control line A10, the control line B12, the control line C18 and the control line D21 are all connected into a PCB control box 16 sold in the market, and the PCB control box 16 is provided with a wifi module.
The wifi module of PCB control box 16 passes through communication network A17 and host computer 26 looks communication, PCB control box 16 passes through communication network C27 and mobile control end 28 looks communication, mobile control end 28 is one or more.
Specifically, valve angle inductor 24 is the inductor sold in the market, valve angle inductor 24 is from taking the wifi module, valve angle inductor 24 passes through communication network B25 and upper computer 26 looks communication.
The working process of the utility model is as follows:
the water pressure at the upstream end 1 of the urban water supply is high, water flows to the valve body 3 of the plug valve and the downstream end 2 of the urban water supply, and the plug valve operates normally at the moment; the valve is opened, and the angle position of the cock valve core 4 is transmitted to an upper computer 26 and a mobile control end 28 through the valve rod 5, the valve angle sensor 24 and a communication network B25.
When the valve angle of the plug valve is required to be reduced or closed, the electromagnetic valve A9 and the emptying electromagnetic valve B22 are simultaneously opened through the upper computer 26, the communication network A17, the PCB control box 16, the control line A10 and the control line D21; at the moment, the pressure water at the upstream of the valve body 3 of the plug valve reaches a piston cylinder control left cavity 11 through a pressure water control channel 6, an electromagnetic valve A9 and a control left cavity channel 8; meanwhile, the piston cylinder controls the pressure water in the right cavity 15 to be exhausted and decompressed through a right cavity exhaust channel 23 and an exhaust electromagnetic valve B22; the piston cylinder controls the pressure water in the left cavity 11 to push the piston 7 to move rightwards, the piston rod 31 is pushed, the sliding block 30 is pushed to move rightwards, the shifting fork-29 is driven to swing clockwise, the valve rod 5 and the cock valve core 4 are driven, and the valve angle of the cock valve is reduced or closed.
When the valve angle of the plug valve needs to be enlarged or opened, the electromagnetic valve B13 and the emptying electromagnetic valve A20 are opened simultaneously through the upper computer 26, the communication network A17, the PCB control box 16, the control line B12 and the control line C18; at the moment, the pressure water at the upstream of the valve body 3 of the plug valve reaches a piston cylinder control right cavity 15 through a pressure water control channel 6, an electromagnetic valve B13 and a control right cavity channel 14; meanwhile, the piston cylinder controls the pressure water in the left cavity 11 to be drained and decompressed through a left cavity drain channel 19 and a drain electromagnetic valve A20; the piston cylinder controls the pressure water in the right cavity 15 to push the piston 7 to move leftwards, the piston rod 31 is pushed, the sliding block 30 is pushed to move leftwards, the shifting fork 29 is driven to swing anticlockwise, the valve rod 5 and the cock valve core 4 are driven, and the valve angle of the cock valve is enlarged or opened.
The utility model discloses a piston cylinder passes through the piston cylinder and realizes the flexible drive to the piston rod, and the airtight structure of sliding outward through the piston outer wall realizes and the sealed slip of cylinder, through the interior installation airtight structure of piston inner wall realize with the piston rod between sealed, guarantee the sealed between the piston cylinder control left side chamber, the piston cylinder control right side chamber, the utility model discloses a valve rod pivoted accuracy has been guaranteed to the airtight slip of piston, has guaranteed the pivoted stability of shift fork.
Claims (10)
1. The utility model provides a plug valve adjusting device of piston, includes plug valve body (3), be provided with plug valve core (4) of opening and close usefulness in plug valve body (3), plug valve core (4) link to each other its characterized in that with valve rod (5): a control box is arranged at the upper end of the plug valve body (3), the valve rod (5) is inserted into the control box, a piston cylinder (32) for driving the valve rod (5) to rotate is arranged on one side of the control box, and a multi-stage closed sliding piston (7) is arranged in the piston cylinder (32);
the piston cylinder (32) comprises a hollow cylindrical cylinder barrel, a left end cover is arranged at one end of the cylinder barrel, a right end cover is arranged at the other end of the cylinder barrel, the left end cover and the right end cover are connected, and the cylinder barrel is clamped and fixed between the left end cover and the right end cover;
a pipe threaded hole is formed in the left end cover, the pipe threaded hole is opposite to the piston rod (31), a top head (38) is arranged in the pipe threaded hole, and the top head (38) extends out of the left end cover, so that the piston rod (31) is prevented from colliding with the left end cover;
inner convex parts are formed on one sides of the left end cover and the right end cover facing the inside of the cylinder barrel, the inner convex parts are consistent with the inner diameter of the cylinder barrel, and the inner convex parts are inserted into the cylinder barrel;
the end faces of the left end cover and the right end cover are close to the inner convex portions to form end face seal grooves, annular seal rings are arranged in the end face seal grooves, and the two ends of the cylinder barrel are sealed by the annular seal rings.
2. A piston plug valve adjustment device according to claim 1, wherein: the piston (7) is of a disc-mounted structure, and the piston (7) comprises an outer sliding sealing structure and an inner mounting sealing structure.
3. A piston plug valve adjustment device according to claim 2, wherein: the piston cylinder (32) comprises a cylinder barrel, and the piston (7) slides along the inner wall of the cylinder barrel in a sealing mode.
4. A piston plug valve adjustment device according to claim 2, wherein: the outer sliding sealing structure comprises a sealing groove I and a sealing groove II which are arranged on the outer wall of the piston (7), a deep sealing ring (33) is arranged in the sealing groove I, and a flat sealing ring (34) is arranged in the sealing groove II.
5. A piston plug valve adjustment device according to claim 4, wherein: the deep sealing ring (33) is larger than the radial width of the flat sealing ring (34), the flat sealing ring (34) is larger than the axial width of the deep sealing ring (33), and the deep sealing ring (33) and the flat sealing ring (34) are combined to realize the sealed stable sliding of the piston (7).
6. A piston plug valve adjustment device according to claim 5, wherein: the inner ring of the piston (7) is connected with the step head of the piston rod (31), and the piston (7) drives the piston rod (31) to slide left and right.
7. A piston plug valve adjustment device according to claim 6, wherein: an external thread is formed at the step head of the piston rod (31), and the step head penetrates through the piston (7) and then is screwed with the connecting nut (37), so that the piston (7) and the piston rod (31) are fixed.
8. A piston plug valve adjustment device according to claim 7, wherein: interior installation enclosed construction includes No. III seal grooves, the No. IV seal groove that piston (7) inner wall department formed, be provided with interior sealing washer A (35) in No. III seal groove, be provided with interior sealing washer B (36) in the No. IV seal groove.
9. A piston plug valve adjustment device according to claim 8, wherein: a sliding block (30) is arranged in the control box, and the piston rod (31) drives the sliding block (30) to slide.
10. A piston plug valve adjustment device according to claim 9, wherein: the upper end of slider (30) is provided with connects the slide bar, forms the guide way in shift fork (29), connect the slide bar and slide in the guide way to drive shift fork (29) and rotate, shift fork (29) cover is on valve rod (5), and shift fork (29) drive valve rod (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222552041.4U CN218883047U (en) | 2022-09-27 | 2022-09-27 | Piston type plug valve adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222552041.4U CN218883047U (en) | 2022-09-27 | 2022-09-27 | Piston type plug valve adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218883047U true CN218883047U (en) | 2023-04-18 |
Family
ID=85946149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222552041.4U Active CN218883047U (en) | 2022-09-27 | 2022-09-27 | Piston type plug valve adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218883047U (en) |
-
2022
- 2022-09-27 CN CN202222552041.4U patent/CN218883047U/en active Active
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