Anti-rotation quick insertion structure and valve assembly
By setting limiting grooves and insertion holes on the male and female pipe joints and using pins for fixed connection, the problems of cumbersome valve assembly and unrestricted rotation in the prior art are solved, and fast and reliable valve connection is achieved.
Patent Information
- Application Number
- CN202520135601.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing threaded connection methods have problems such as cumbersome installation, poor sealing effect and inability to restrict valve rotation during valve assembly. They are especially difficult to operate when space is limited, and quick-connect structures cannot effectively prevent relative rotation of the valve.
The structure adopts an anti-rotation quick-connection design. Limiting grooves and insertion holes are set on the male and female pipe connectors, and a pin is used for fixed connection. At the same time, circumferential limiting parts are set on the male and female pipe connectors to restrict their relative rotation, thereby achieving axial fixation and circumferential limiting.
It enables quick connection between valves, ensures sealing, and effectively prevents relative rotation of valves, meeting the rotation restriction requirements of certain valves during installation, and improving assembly efficiency and reliability.
Smart Images
Figure CN223635671U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to valve connection technical field especially, relate to a prevent fast plug structure and valve assembly. BACKGROUND
[0002] Although the threaded connection mode is relatively common in pipeline connection, but this connection mode has the problem of complicated installation in the assembly process. First, in order to ensure the sealing effect, usually need to wind raw tape at the threaded connection during installation, the raw tape is too thick, and the two connecting pipelines cannot be connected. If the raw tape is too thin, leakage is likely to occur. In addition, in order to ensure the close fit, the above connection mode must be assisted by a wrench or other installation tools during actual installation, which often increases the operation difficulty and greatly affects the installation efficiency when the installation space is limited.
[0003] In order to solve the above problems, in the prior art, the valve and the valve are connected by a connecting structure for quick connection. The valve quick connection usually includes a female pipe joint and a male pipe joint inserted into the female pipe joint. A limiting groove is formed on the outer side wall of the male pipe joint along the circumference thereof. The female pipe joint is provided with a insertion hole corresponding to the position of the groove. The insertion hole and the limiting groove are penetrated by a pin to realize the connection between the male pipe joint and the female pipe joint.
[0004] The disadvantage of such arrangement is that the male pipe joint and the female pipe joint cannot be locked and can still rotate relative to each other, which cannot meet the requirement of limiting the rotation of the valve. Specifically, some valves (such as check valves, etc.) have directional requirements when installed on the pipeline, for example, the valve must be kept horizontal or vertical as a whole, so the valve cannot be rotated relative to the pipeline after assembly is completed.
[0005] Therefore, it is urgent to provide a quick plug structure and a valve assembly to solve the above problems. INVENTION CONTENTS
[0006] One object of the utility model is to provide a quick plug structure that can limit the relative rotation of the male pipe joint and the female pipe joint, thereby preventing the relative rotation of the valve and the valve.
[0007] Another object of the utility model is to provide a valve assembly that can limit the relative rotation of the male pipe joint and the female pipe joint by using the above quick plug structure, thereby preventing the relative rotation of the valve and the valve.
[0008] To achieve this object, the utility model adopts the following technical solutions:
[0009] The anti-rotation quick plug structure comprises a male pipe joint, a female pipe joint and a plug pin, the male pipe joint is inserted into the female pipe joint, a limiting groove is formed on the outer wall of the male pipe joint along the circumference thereof, a plug hole is formed on the female pipe joint, the plug pin is arranged in the plug hole and is simultaneously limited in the limiting groove, a first circumferential limiting part is arranged on the outer wall of the male pipe joint, a second circumferential limiting part is arranged on the inner wall of the female pipe joint, and the first circumferential limiting part and the second circumferential limiting part are matched to circumferentially limit the male pipe joint and the female pipe joint.
[0010] As an optional solution, the first circumferential limiting part is an outer polygonal part formed on the outer wall of the male pipe joint, the second circumferential limiting part is an inner polygonal part formed on the inner wall of the female pipe joint, the inner polygonal part is matched with the outer polygonal part, the inner polygonal part is sleeved on the outer polygonal part and is circumferentially limited with the outer polygonal part.
[0011] As an optional solution, the end of the male pipe joint inserted into the female pipe joint is defined as a first end, the other end of the male pipe joint is defined as a second end, the end of the female pipe joint for inserting the male pipe joint is defined as a third end, the other end of the female pipe joint is defined as a fourth end, the outer polygonal part is located at the first end, and the inner polygonal part is located at the fourth end.
[0012] As an optional solution, the end of the male pipe joint inserted into the female pipe joint is defined as a first end, the other end of the male pipe joint is defined as a second end, the end of the female pipe joint for inserting the male pipe joint is defined as a third end, the other end of the female pipe joint is defined as a fourth end, the outer polygonal part is located at the second end, and the inner polygonal part is located at the third end.
[0013] As an optional solution, the outer polygonal part is an outer hexagonal part, and the inner polygonal part is an inner hexagonal part.
[0014] As an optional solution, the plug pin is a single plug pin, one plug hole is formed on the female pipe joint, part of the single plug pin is arranged in the plug hole and is simultaneously limited in the limiting groove, and part of the single plug pin is exposed outside the plug hole.
[0015] As an optional solution, a threaded hole is formed at one end of the plug hole of the female pipe joint, the threaded hole is communicated with the plug hole, part of the outer wall of the single plug pin is provided with external threads, and the single plug pin is connected with the threaded hole through the external threads.
[0016] As an optional scheme, the plug is a U-shaped plug, each of two opposite sides of the female pipe joint is provided with one of the insertion holes, two free ends of the U-shaped plug are respectively inserted into the corresponding insertion holes and are simultaneously limited in the limiting grooves, and part of the U-shaped plug is exposed outside the insertion hole.
[0017] As an optional scheme, the male pipe joint is provided with a first sealing ring in sealing cooperation with the female pipe joint, and the first sealing ring is located between the end face of the male pipe joint and the limiting groove.
[0018] As an optional scheme, a second sealing ring is further arranged between the male pipe joint and the female pipe joint, and the second sealing ring and the first sealing ring are arranged on two sides of the limiting groove.
[0019] The valve assembly comprises the anti-rotation quick insertion structure.
[0020] The valve assembly comprises the anti-rotation quick insertion structure.
[0021] The valve assembly comprises the anti-rotation quick insertion structure.
[0022] The valve assembly comprises the anti-rotation quick insertion structure. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 is a structure schematic view of two valve connections provided by the utility model;
[0024] Figure 2 is a radial section view of the anti-rotation quick insertion structure provided by the utility model;
[0025] Figure 3 is a structure schematic view of the male pipe joint provided by an optional embodiment of the utility model;
[0026] Figure 4 is a structure schematic view of the female pipe joint provided by an optional embodiment of the utility model;
[0027] Figure 5 is the axial sectional view of the anti-rotation quick plug structure provided by the optional embodiment of the utility model;
[0028] Figure 6 is the structure schematic view of the male pipe joint provided by another optional embodiment of the utility model;
[0029] Figure 7 is the structure schematic view of the female pipe joint provided by another optional embodiment of the utility model;
[0030] Figure 8 is the axial sectional view of the anti-rotation quick plug structure provided by another optional embodiment of the utility model.
[0031] In the drawing:
[0032] 10, first valve; 20, second valve;
[0033] 1, male pipe joint; 11, limiting groove; 12, first circumferential limiting part; 121, outer polygonal part; 13, first end; 14, second end; 15, first sealing groove; 16, second sealing groove;
[0034] 2, female pipe joint; 21, insertion hole; 22, second circumferential limiting part; 221, inner polygonal part; 23, third end; 24, fourth end; 25, threaded hole;
[0035] 3, bolt; 31, single bolt; 311, external thread; 312, anti-skid structure;
[0036] 4, first sealing ring; 5, second sealing ring; 6, third sealing ring. DETAILED DESCRIPTION
[0037] The utility model will be further explained in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.
[0038] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or be integrated, can be mechanically connected, or be electrically connected, can be directly connected, or be indirectly connected through the intermediate medium, can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0040] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0041] This embodiment provides an anti-rotation quick-connect structure, which is mainly used for quick connection between valves in water systems such as urban water supply and drainage systems, fire protection systems, water treatment systems, domestic water systems, air conditioning systems, and heating systems.
[0042] Specifically, such as Figure 1 As shown, the anti-rotation quick-connect structure includes a male connector 1 and a female connector 2. One end of the male connector 1 is inserted into the female connector 2. The male connector 1 is part of the first valve 10, and the female connector 2 is part of the second valve 20. The male connector 1 and the female connector 2 are inserted and matched to realize the quick connection between the first valve 10 and the second valve 20, and to ensure the mutual flow of the internal media.
[0043] Specifically, such as Figure 2 As shown, the anti-rotation quick-connect structure also includes a pin 3. A limiting groove 11 is formed along the circumference of the outer wall of the male connector 1, and a socket 21 is formed on the female connector 2. The pin 3 passes through the socket 21 and is simultaneously confined within the limiting groove 11. Further, as... Figures 3 to 5 As shown, a first circumferential limiting part 12 is provided on the outer wall of the male pipe connector 1, and a second circumferential limiting part 22 is provided on the inner wall of the female pipe connector 2. The first circumferential limiting part 12 and the second circumferential limiting part 22 cooperate to circumferentially limit the male pipe connector 1 and the female pipe connector 2.
[0044] During installation, one end of the male pipe joint 1 is inserted into the female pipe joint 2, and the male pipe joint 1 and the female pipe joint 2 are rotated so that the first circumferential limiting part 12 cooperates with the second circumferential limiting part 22, after installation, the bolt 3 is inserted into the insertion hole 21, the bolt 3 is arranged in the insertion hole 21, and is limited in the limiting groove 11, thereby achieving axial fixed connection of the female pipe joint 2 and the male pipe joint 1, so as to ensure that the male pipe joint 1 and the female pipe joint 2 cannot be relatively displaced in the axial direction. Moreover, through cooperation of the first circumferential limiting part 12 and the second circumferential limiting part 22, relative rotation of the male pipe joint 1 and the female pipe joint 2 can be limited, thereby preventing relative rotation of the valve, and further meeting the requirement of limiting rotation during installation of some valves.
[0045] In the embodiment, as shown in Figures 3 to 5 the first circumferential limiting part 12 is an outer polygonal part 121 formed on the outer wall of the male pipe joint 1, and the second circumferential limiting part 22 is an inner polygonal part 221 formed on the inner wall of the female pipe joint 2, the inner polygonal part 221 is adapted to the outer polygonal part 121, the inner polygonal part 221 is arranged on the outer polygonal part 121, and is circumferentially limited by the outer polygonal part 121. By arranging the inner polygonal part 221 on the outer polygonal part 121, circumferential limiting of the male pipe joint 1 and the female pipe joint 2 is achieved, so that the anti-rotation structure is simple, and the anti-rotation effect is good.
[0046] In an optional embodiment, as shown in Figures 3 to 5 the one end of the male pipe joint 1 inserted into the female pipe joint 2 is defined as a first end 13, the other end of the male pipe joint 1 is defined as a second end 14, the one end of the female pipe joint 2 for inserting the male pipe joint 1 is defined as a third end 23, and the other end of the female pipe joint 2 is defined as a fourth end 24, the outer polygonal part 121 is located at the first end 13, and the inner polygonal part 221 is located at the fourth end 24. When the inner polygonal part 221 is arranged on the outer polygonal part 121, circumferential limiting of the male pipe joint 1 and the female pipe joint 2 is achieved, so that the anti-rotation structure is simple, and the anti-rotation effect is good.
[0047] In another optional embodiment, as shown in Figures 6 to 8 the outer polygonal part 121 is located at the second end 14, and the inner polygonal part 221 is located at the third end 23. When the inner polygonal part 221 is arranged on the outer polygonal part 121, circumferential limiting of the male pipe joint 1 and the female pipe joint 2 is achieved, so that the anti-rotation structure is simple, and the anti-rotation effect is good.
[0048] In an optional embodiment, as shown in Figure 3 and Figure 4As shown, the outer polygonal part 121 is an outer hexagonal part, and the inner polygonal part 221 is an inner hexagonal part, and when the inner hexagonal part is sleeved on the outer hexagonal part, the circumferential limiting of the male pipe joint 1 and the female pipe joint 2 can be realized. In other alternative embodiments, the outer polygonal part 121 and the inner polygonal part 221 can also be triangular, square, pentagonal or other polygonal structures, which can be selected according to actual needs, and no specific limitation is made herein.
[0049] In another alternative embodiment, the first circumferential limiting part 12 can also be a plurality of first convex edges, the plurality of first convex edges are equidistantly distributed on the outer wall of the male pipe joint 1 in the circumferential direction, and a first limiting gap is formed between each adjacent two first convex edges. The second circumferential limiting part 22 can be a plurality of second convex edges, the plurality of second convex edges are equidistantly distributed on the inner wall of the female pipe joint 2 in the circumferential direction, and a second limiting gap is formed between two second convex edges. When the male pipe joint 1 and the female pipe joint 2 are assembled, the plurality of first convex edges and the plurality of second limiting gaps are one-to-one correspondingly fitted, and the plurality of second convex edges and the plurality of first limiting gaps are one-to-one correspondingly fitted, which can also realize the effect of limiting the rotation of the male pipe joint 1 relative to the female pipe joint 2.
[0050] In this embodiment, as shown in Figure 2 The pin 3 is a single pin 31, and the female pipe joint 2 is provided with a plug hole 21, and part of the single pin 31 is arranged in the plug hole 21 and is simultaneously limited in the limiting groove 11, and part of the single pin 31 is exposed outside the plug hole 21. Specifically, the plug hole 21 is arranged along the tangential direction of the female pipe joint 2 and penetrates the inner wall of the female pipe joint 2 at the same time, the plug hole 21 intersects with the limiting groove 11, and when the single pin 31 is arranged in the plug hole 21, part of the single pin 31 is naturally limited in the limiting groove 11, thereby realizing the axial fixed connection of the male pipe joint 1 and the female pipe joint 2, which is convenient to install, and the part of the single pin 31 exposed outside the plug hole 21 is used for hand holding, which is convenient to disassemble and assemble. The single pin 31 is preferably a straight rod, but can also be other shapes.
[0051] In an alternative embodiment, as shown in Figure 2 The plug hole 21 can be a blind hole, and the other end of the single pin 31 does not penetrate the plug hole 21. In another alternative embodiment, the plug hole 21 can also be a through hole, and the single pin 31 can completely penetrate the plug hole 21, so as to further enhance the reliability of the connection.
[0052] In an alternative embodiment, as shown in Figure 2 The female pipe joint 2 is provided with a threaded hole 25 at one end of the plug hole 21, the threaded hole 25 communicates with the plug hole 21, and an outer thread 311 is arranged on part of the outer wall of the single pin 31, and the single pin 31 is connected with the threaded hole 25 through the outer thread 311, so that the single pin 31 can be prevented from falling off through the threaded fastening connection.
[0053] Further, with reference to Figure 2The threaded hole 25 has a larger hole diameter than the hole diameter of the insertion hole 21, and the hole bottom of the threaded hole 25 is embedded with a third sealing ring 6, the third sealing ring 6 is sleeved outside the single insertion pin 31, and the stepped surface of the single insertion pin 31 abuts against the third sealing ring 6. The third sealing ring 6 mainly plays a role of sealing dust prevention.
[0054] As shown in Figure 4 , the outer circumferential surface of the part of the single insertion pin 31 exposed outside the threaded hole 25 is provided with an anti-skid structure 312, which can play an anti-skid role when the single insertion pin 31 is screwed, and improve the screwing efficiency. In the embodiment, the anti-skid structure 312 is a dense convex tooth formed on the outer circumferential surface of the single insertion pin 31. In other embodiments, the anti-skid structure 312 can also be an anti-skid line provided on the outer circumferential surface of the single insertion pin 31, or a rubber pad or other component sleeved outside the single insertion pin 31, which is not specifically limited here.
[0055] In another alternative embodiment, the insertion pin 3 is a U-shaped insertion pin, the female pipe joint 2 is provided with one insertion hole 21 on each of the two opposite sides, and the two free ends of the U-shaped insertion pin are respectively arranged in the corresponding insertion hole 21 and simultaneously limited in the limiting groove 11. Part of the U-shaped insertion pin is exposed outside the insertion hole 21, so that the axial fixed connection of the male pipe joint 1 and the female pipe joint 2 can also be achieved, and the part of the U-shaped insertion pin exposed outside the insertion hole 21 can be used as a force application position when pulled out, so that the disassembly and assembly are convenient and fast. It should be noted that the setting of such a U-shaped insertion pin is relatively common in the prior art, so it is not shown in the figure.
[0056] In another alternative embodiment, two single insertion pins 31 and two symmetrically arranged insertion holes 21 can also be provided, and each single insertion pin 31 is respectively inserted into the two insertion holes 21, so that the axial fixed connection of the male pipe joint 1 and the female pipe joint 2 can also be achieved.
[0057] In the embodiment, as shown in Figure 5 , the male pipe joint 1 is provided with a first sealing ring 4 in sealing cooperation with the female pipe joint 2, and the first sealing ring 4 is located between the end face (the first end 13) of the male pipe joint 1 and the limiting groove 11. Specifically, as shown in Figure 3 , the outer side wall of the male pipe joint 1 is provided with a first sealing groove 15 which surrounds the circumference thereof, the first sealing groove 15 is located between the limiting groove 11 and the first end 13, the first sealing ring 4 is arranged in the first sealing groove 15, and the outer circle of the first sealing ring 4 abuts against the inner wall of the female pipe joint 2. The first sealing ring 4 has a relatively thick diameter and is closer to the end face of the male pipe joint 1, and is mainly used for sealing between the male pipe joint 1 and the side wall of the female pipe joint 2, so as to prevent liquid from leaking out from the gap between the insertion hole 21 and the male pipe joint 1 and the female pipe joint 2.
[0058] Further, with reference to Figure 5The male pipe joint 1 is further provided with a second sealing ring 5 in sealing cooperation with the female pipe joint 2, and the second sealing ring 5 and the first sealing groove 15 are arranged on two sides of the limiting groove 11. Figure 3 As shown in FIG. 4, the outer side wall of the male pipe joint 1 is further provided with a second sealing groove 16 which surrounds the circumference of the male pipe joint 1, and the second sealing groove 16 is located on the side of the limiting groove 11 away from the first end 13. The second sealing ring 5 is accommodated in the second sealing groove 16. The second sealing ring 5 has a smaller diameter than the first sealing ring 4, and provides a second protection for the sealing between the male pipe joint 1 and the female pipe joint 2, thereby further enhancing the sealing effect.
[0059] The embodiment further provides a valve assembly comprising the first valve 10, the second valve 20 and the anti-rotation quick plug structure. Specifically, the male pipe joint 1 is a part of the first valve 10, the female pipe joint 2 is a part of the second valve 20, and the male pipe joint 1 is plugged into the female pipe joint 2 to achieve quick connection between the first valve 10 and the second valve 20. The first valve 10 and the second valve 20 can be one of a ball valve, a gate valve, a stop valve, a pressure reducing valve and the like, and are not limited herein.
[0060] The valve assembly provided by the embodiment can limit the relative rotation between the male pipe joint 1 and the female pipe joint 2, thereby preventing the relative rotation between the valves, and further meeting the requirement of limiting rotation during installation of some valves.
[0061] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not a limitation on the embodiments of the utility model. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. A rotation-preventing quick plug structure, comprising a male pipe joint (1), a female pipe joint (2) and a plug pin (3), the male pipe joint (1) being plugged into the female pipe joint (2), a limiting groove (11) being formed on the outer side wall of the male pipe joint (1) along the circumference thereof, a plug hole (21) being formed on the female pipe joint (2), the plug pin (3) being arranged in the plug hole (21) and being simultaneously limited in the limiting groove (11), characterized in that, The outer wall of the male pipe joint (1) is provided with a first circumferential limiting part (12), the inner wall of the female pipe joint (2) is provided with a second circumferential limiting part (22), the first circumferential limiting part (12) cooperates with the second circumferential limiting part (22) to circumferentially limit the male pipe joint (1) and the female pipe joint (2).
2. The anti-rotation quick plug structure according to claim 1, wherein, The first circumferential limiting part (12) is an outer polygonal part (121) formed on the outer wall of the male pipe joint (1), the second circumferential limiting part (22) is an inner polygonal part (221) formed on the inner wall of the female pipe joint (2), the inner polygonal part (221) is adapted to the outer polygonal part (121), the inner polygonal part (221) is sleeved on the outer polygonal part (121) and circumferentially limited by the outer polygonal part (121).
3. The anti-rotation quick plug structure of claim 2, wherein, The end of the male pipe joint (1) inserted into the female pipe joint (2) first is defined as a first end (13), the other end of the male pipe joint (1) is a second end (14), the end of the female pipe joint (2) for the male pipe joint (1) to insert is defined as a third end (23), the other end of the female pipe joint (2) is a fourth end (24), the outer polygonal part (121) is located at the first end (13), and the inner polygonal part (221) is located at the fourth end (24).
4. The anti-rotation quick connector of claim 2, wherein, The end of the male pipe joint (1) inserted into the female pipe joint (2) first is a first end (13), the other end of the male pipe joint (1) is a second end (14), the end of the female pipe joint (2) for the male pipe joint (1) to insert is a third end (23), the other end of the female pipe joint (2) is a fourth end (24), the outer polygonal part (121) is located at the second end (14), and the inner polygonal part (221) is located at the third end (23).
5. The anti-rotation quick connector of claim 2, wherein, The outer polygonal part (121) is an outer hexagonal part, and the inner polygonal part (221) is an inner hexagonal part.
6. The anti-rotation quick connector of claim 1, wherein, The plug (3) is a single plug (31), the female pipe joint (2) is provided with one insertion hole (21), part of the single plug (31) is arranged in the insertion hole (21) and is simultaneously limited in the limiting groove (11), and part of the single plug (31) is exposed outside the insertion hole (21).
7. The anti-rotation quick plug structure of claim 6, wherein The female pipe joint (2) is provided with a threaded hole (25) at one end of the insertion hole (21), the threaded hole (25) is communicated with the insertion hole (21), part of the outer wall of the single plug (31) is provided with external threads (311), and the single plug (31) is connected with the threaded hole (25) through the external threads (311).
8. The anti-rotation quick connector of claim 1, wherein, The plug (3) is a U-shaped plug, the female pipe joint (2) is provided with one insertion hole (21) at each of two opposite sides, two free ends of the U-shaped plug are respectively arranged in the corresponding insertion hole (21) and are simultaneously limited in the limiting groove (11), and part of the U-shaped plug is exposed outside the insertion hole (21).
9. The anti-rotation quick connector of claim 1, wherein, The male pipe joint (1) is provided with a first sealing ring (4) in sealing cooperation with the female pipe joint (2), and the first sealing ring (4) is located between the end face of the male pipe joint (1) and the limiting groove (11); The male pipe joint (1) is further provided with a second sealing ring (5) between the female pipe joint (2), and the second sealing ring (5) and the first sealing ring (4) are separately arranged on both sides of the limiting groove (11).
10. A valve assembly characterized by, The anti-rotation quick plug structure comprises a female pipe joint (2) and a male pipe joint (1) connected to the female pipe joint (2), wherein the male pipe joint (1) comprises a connecting rod (3) and a limiting groove (11) formed on the connecting rod (3), and the connecting rod (3) is provided with a limiting protrusion (12) on the side of the limiting groove (11) away from the female pipe joint (2). The anti-rotation quick plug structure comprises a female pipe joint (2) and a male pipe joint (1) connected to the female pipe joint (2), wherein the male pipe joint (1) comprises a connecting rod (3) and a limiting groove (11) formed on the connecting rod (3), and the connecting rod (3) is provided with a limiting protrusion (12) on the side of the limiting groove (11) away from the female pipe joint (2).