Plug-in assembly

Abstract

The utility model discloses a plug-in assembly, and belongs to the technical field of valves. The inserting assembly comprises a first connecting joint, a second connecting joint and a limiting pin, the first connecting joint is formed at one end of the first component, and an inserting hole is formed in the first connecting joint; the second connecting joint is formed at one end of the second component, the first connecting joint is arranged outside the second connecting joint in a sealing and sleeving mode, and a limiting sliding groove is formed in the outer wall of the second connecting joint; the limiting pin is inserted into the inserting hole, a part of the limiting pin is located in the limiting sliding groove, the part, located in the limiting sliding groove, of the limiting pin forms a matching part, and the matching part can abut against the groove wall, close to one side of the end face of the second connecting joint, of the limiting sliding groove so as to limit the first connecting joint and the second connecting joint which are inserted in the axial direction; and the maximum size of the matching part in the axial direction of the second connecting joint is smaller than the size of the limiting sliding groove in the axial direction of the second connecting joint. The plug-in assembly can improve the assembly efficiency, and is convenient to disassemble and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of valve components, in particular to a plug-in assembly. Background Art

[0002] Threaded connections are common in valve connections, but they often present the following challenges during assembly and disassembly: 1) The installation process is cumbersome. To ensure a good seal, threaded connections often require wrapping with raw tape during installation. If the tape is wrapped too thickly, the two connected pipes cannot mate, while if it is wrapped too thinly, leakage is likely to occur. 2) Installation efficiency is low and disassembly is inconvenient. To ensure a tight fit, installation tools such as wrenches are required during installation. However, in actual use, the installation space of the entire pipeline is very tight, and there is often no clearance between valves or between valves and pipelines, making operation more difficult and maintenance more inconvenient.

[0003] Therefore, it is urgent to propose a plug-in assembly to solve the above problems. Utility Model Content

[0004] The purpose of the present invention is to solve or at least alleviate part or all of the above problems. To this end, the purpose of the present invention is to provide a plug assembly that can simplify the assembly process, improve assembly efficiency, and facilitate disassembly and maintenance.

[0005] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0006] A plug-in assembly for connecting a first component and a second component, the plug-in assembly comprising:

[0007] a first connecting joint formed at one end of the first component, the first connecting joint being provided with a plug hole communicating with an internal flow passage thereof;

[0008] A second connecting joint is formed at one end of the second component, the first connecting joint sealing sleeve is arranged outside the second connecting joint, and a limiting sliding groove is provided on the outer wall of the second connecting joint;

[0009] A limit pin is inserted into the insertion hole, and part of the limit pin is located in the limit slide groove. The part of the limit pin located in the limit slide groove forms a matching portion, and the matching portion can be abutted against the groove wall of the limit slide groove on the side close to the end face of the second connection joint to limit the first connection joint and the second connection joint that are plugged in in the axial direction; the maximum dimension of the matching portion in the axial direction of the second connection joint is smaller than the dimension of the limit slide groove in the axial direction of the second connection joint.

[0010] As a preferred solution, the first connecting joint includes a main body and an extension portion arranged along a tangent direction of the main body, and the plug hole is provided in the extension portion.

[0011] As a preferred solution, the axial direction of the plug-in hole is parallel to the radial direction of the main body, and the middle part of the plug-in hole is connected to the internal flow channel of the first connecting joint, the limit pin is inserted into the plug-in hole, and the matching part is formed on the side of the limit pin.

[0012] As a preferred solution, a limiting portion is provided on the outer wall of the second connecting joint, and the limiting portion is located on the side of the limiting slide away from the end face of the second connecting joint. The limiting portion can be abutted against the end face of the first connecting joint to limit the sliding distance of the first connecting joint relative to the second connecting joint.

[0013] As a preferred solution, the plug hole is a through hole or a blind hole.

[0014] As a preferred solution, at least one sealing member is further provided between the first connecting joint and the second connecting joint, and the sealing member is located between the limiting sliding groove and the end face of the second connecting joint.

[0015] As a preferred solution, the limit pin is a single latch pin.

[0016] As a preferred solution, the limiting sliding groove is an annular groove.

[0017] As a preferred solution, the first component is a first valve; and / or the second component is a second valve.

[0018] As a preferred solution, the first valve is a pressure reducing valve, a check valve, a gate valve, a ball valve or a stop valve; and / or

[0019] The second valve is a pressure reducing valve, a check valve, a gate valve, a ball valve or a stop valve.

[0020] The beneficial effects of the present invention are:

[0021] The plug-in assembly provided by the present invention can be used for stable connection between a first valve and a second valve. When connecting, the second connecting joint can be inserted into the first connecting joint first; after being plugged into place, the limit pin can be inserted into the plug hole. At this time, the matching portion of the limit pin can be located in the limiting slide to limit the first connecting joint and the second connecting joint that are plugged in, so as to prevent the two from being separated during use. By setting the maximum axial dimension of the matching portion of the second connecting joint to be smaller than the axial dimension of the limiting slide in the second connecting joint, the plug-in first connecting joint and the second connecting joint can still be extended and retracted along the axial direction of the two, so as to leave sufficient space for the two plug-in valves to be connected to or removed from the corresponding pipeline, thereby reducing the difficulty of operation for the operator and improving the efficiency of disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0023] Figure 1 This is a structural diagram of the plug-in assembly provided in the first embodiment of the present utility model;

[0024] Figure 2 This is a partial structural diagram of the first valve provided in Example 1 of the present utility model;

[0025] Figure 3 This is a cross-sectional schematic diagram of the first valve provided in Example 1 of the present utility model;

[0026] Figure 4 This is a structural diagram of the second valve provided in Example 1 of the present utility model;

[0027] Figure 5 This is a cross-sectional schematic diagram of the second valve provided in Example 1 of the present utility model;

[0028] Figure 6 This is a first cross-sectional schematic diagram (partial) of the plug assembly provided in the first embodiment of the present invention;

[0029] Figure 7 This is a second cross-sectional schematic diagram (partial) of the plug assembly provided in the first embodiment of the present utility model;

[0030] Figure 8 This is a schematic structural diagram of the limit pin provided in the first embodiment of the present utility model;

[0031] Figure 9 This is a partial structural diagram of the first valve provided in the second embodiment of the present utility model;

[0032] Figure 10 It is a cross-sectional schematic diagram (partial) of the plug assembly provided in the second embodiment of the present utility model.

[0033] Reference numerals:

[0034] 100, first valve; 110, first valve body; 120, first connecting joint; 121, main body; 122, extension; 1221, plug hole;

[0035] 200, second valve; 210, second valve body; 220, second connecting joint; 221, limiting slide groove; 222, accommodating groove; 223, limiting portion;

[0036] 300, limit pin; 301, handle;

[0037] 400. Seals. DETAILED DESCRIPTION

[0038] Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0039] In this utility model, the terms "comprises," "includes," "has," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0040] In this utility model, the term "and / or" describes an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this utility model generally indicates that the related objects are in an "and / or" relationship.

[0041] In this utility model, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the presence of an intermediary, while an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may also include electrical connections or couplings.

[0042] In the present invention, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, and use associated with a specific value, and the like. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not employ relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0043] In the present invention, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0044] In the present invention, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present invention. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front, and lower back, etc.

[0045] The present invention provides a plug-in assembly, which is used to connect a first component and a second component. Specifically, the plug-in assembly can be used for pipeline connection, wherein the first component is a first pipeline to be connected, and the second component is a second pipeline to be connected; the plug-in assembly can also be used for connecting valves and pipelines, wherein the first component is a pipeline to be connected, and the second component is a valve to be connected; the plug-in assembly can also be used for valve connection, wherein the first component is a first valve to be connected, and the second component is a second valve to be connected. It should be noted that the present invention does not limit the specific structure and model of the above-mentioned valves, which can be pressure reducing valves, check valves, gate valves, ball valves, stop valves, etc.

[0046] For ease of understanding, the plug-in assembly provided by the present invention is described in detail below using two connected valves as an example through multiple embodiments.

[0047] Example 1

[0048] Figure 1 A schematic structural diagram of the plug-in assembly provided in this embodiment is shown. Figure 2 FIG. 1 shows a partial structural diagram of the first valve 100 provided in this embodiment. Figure 3 FIG. 1 shows a schematic cross-sectional view of the first valve 100 provided in this embodiment. Figure 4 FIG. 2 shows a schematic structural diagram of the second valve 200 provided in this embodiment. Figure 5 FIG. 2 shows a cross-sectional view of the second valve 200 provided in this embodiment. Figure 1-Figure 5 As shown, this embodiment provides a plug-in assembly for connecting a first component (a first valve 100) and a second component (a second valve 200). Figure 3 As the dotted line in the figure, the first valve 100 includes a first valve body 110 and a first connecting joint 120 connected to each other; Figure 5 The second valve 200 includes a second valve body 210 and a second connecting joint 220, as demarcated by the dashed line in FIG. When connected, the first connecting joint 120 is sealed over the second connecting joint 220, so that the first connecting joint 120 and the second connecting joint 220 are in contact with each other and the media inside them can flow between them.

[0049] Figure 6 A first cross-sectional schematic diagram (part) of the plug-in assembly provided in this embodiment is shown. Figure 7 FIG. 2 shows a second cross-sectional schematic diagram (partial) of the plug assembly provided in this embodiment. Figure 6-Figure 7 Combined with Figure 2-Figure 5As shown, the plug-in assembly also includes a limit pin 300, and the first connecting joint 120 is provided with a plug-in hole 1221 connected to its internal flow channel; a limit slot 221 is provided on the outer wall of the second connecting joint 220; the limit pin 300 is inserted into the plug-in hole 1221, and part of the limit pin 300 is located in the limit slot 221, and the part of the limit pin 300 located in the limit slot 221 forms a matching portion, and the matching portion can be abutted against the groove wall of the limiting slot 221 on the side close to the end face of the second connecting joint 220 to limit the first connecting joint 120 and the second connecting joint 220 in the axial direction; the maximum dimension of the matching portion in the axial direction of the second connecting joint 220 is smaller than the dimension of the limiting slot 221 in the axial direction of the second connecting joint 220.

[0050] The plug-in assembly provided in this embodiment can be used for a stable connection between the first valve 100 and the second valve 200. When connecting, the second connecting joint 220 can be inserted into the first connecting joint 120 first; after being plugged into place, the limiting pin 300 can be inserted into the plug hole 1221. At this time, the matching portion of the limiting pin 300 can be located in the limiting slide 221 to limit the first connecting joint 120 and the second connecting joint 220 that are plugged in, so as to prevent the two from being separated during use. By setting the maximum axial dimension of the matching portion of the second connecting joint 220 to be smaller than the axial dimension of the limiting slide 221 of the second connecting joint 220, the plug-in first connecting joint 120 and the second connecting joint 220 can still be extended and retracted along the axial direction of the two, so as to leave sufficient space for the two plug-in valves to be connected to or removed from the corresponding pipeline, thereby reducing the difficulty of operation for the operator and improving the efficiency of disassembly and assembly.

[0051] Specifically, the specific steps for installing the two valves (valve assemblies) connected by the plug-in assembly in the corresponding pipeline are: 1) first move the two valves along the axial direction of the second connecting joint 220 (which is also the axial direction of the first connecting joint 120) so that their dimension along the axial direction of the second connecting joint 220 is the shortest; 2) one end of the valve assembly (the end of the first valve 100 away from the second valve 200 or the end of the second valve 200 away from the first valve 100) is connected to the corresponding pipeline; 3) move the two valves along the axial direction of the second connecting joint 220 so that the dimension of the valve assembly along the axial direction of the second connecting joint 220 is adapted to the dimension of the corresponding connection position, and then connect the other end of the valve assembly to the corresponding pipeline.

[0052] like Figure 2As shown, in this embodiment, the first connecting joint 120 includes a main body 121 and an extension portion 122 arranged tangentially to the main body 121, and the plug hole 1221 is provided in the extension portion 122. Specifically, a flow channel for the fluid medium to pass through is provided in the main body 121, and the extension portion 122 extends tangentially to the main body 121. The provision of the extension portion 122 can lengthen the length of the plug hole 1221, thereby improving the reliability of the plug assembly; and can avoid the situation where the diameter of the flow channel inside the first connecting joint 120 is reduced due to directly setting the plug hole 1221 on the side wall of the main body 121, thereby ensuring the normal circulation of the fluid medium. Optionally, the end face of the extension portion 122 is a plane, and the plug hole 1221 is provided on this plane, which facilitates positioning and processing of the plug hole 1221.

[0053] In this embodiment, the axial direction of the insertion hole 1221 is parallel to the radial direction of the main body 121 and perpendicular to the axial direction of the first connecting joint 120. The central portion of the insertion hole 1221 communicates with the internal flow channel of the first connecting joint 120. The stop pin 300 is inserted into the insertion hole 1221, and the aforementioned mating portion is formed on the side of the stop pin 300. This arrangement increases the length of the mating portion of the stop pin 300 retained in the limiting groove 221, thereby improving the retaining effect and thereby ensuring the stability of the connection between the first valve 100 and the second valve 200. When the first valve 100 and the second valve 200 are connected, the second connecting joint 220 and the first connecting joint 120 are inserted along the axial direction of the first connecting joint 120. The stop pin 300 limits the second connecting joint 220 and the first connecting joint 120 in a direction perpendicular to the axial direction of the first connecting joint 120, further ensuring the stability of the connection between the two.

[0054] Optionally, in this embodiment, the plug hole 1221 is a through hole that passes through the extension portion 122 to facilitate processing.

[0055] like Figure 4 As shown, the limiting groove 221 is an annular groove and is perpendicular to the central axis of the second connecting joint 220. This not only facilitates processing, but also allows the first connecting joint 120 to rotate 360 ​​degrees during the process of the second connecting joint 220 extending into the first connecting joint 120. When assembling the limiting pin 300, there is no need to adjust the relative angle between the second connecting joint 220 and the first connecting joint 120. After the limiting pin 300 extends from the insertion hole 1221, it remains within the area of ​​the limiting groove 221, further facilitating the installation of the limiting pin 300. In addition, after the first valve 100 and the second valve 200 are connected, they can also rotate relative to each other to adjust the installation angle of the first valve 100 or the second valve 200, thereby ensuring the performance of the entire valve assembly.

[0056] like Figure 4-Figure 6 As shown, a limiting portion 223 is provided on the outer wall of the second connection joint 220. The limiting portion 223 is located on the side of the limiting sliding groove 221 away from the end surface of the second connection joint 220. The limiting portion 223 can abut against the end surface of the first connection joint 120 to limit the sliding distance of the first connection joint 120 relative to the second connection joint 220. Specifically, when the first valve 100 is moved to the right relative to the second valve 200 (as shown in FIG. Figure 6 When the first valve 100 moves to the left relative to the second valve 200 (as shown in the figure), the end surface of the first connecting joint 120 abuts against the limiting portion 223, the valve assembly has the shortest dimension along the axis of the second connecting joint 220. Figure 6 When the limiting pin 300 abuts against the left side wall of the limiting slot 221, the valve assembly is longest in the axial direction of the second connecting joint 220, thereby limiting the relative movement between the first valve 100 and the second valve 200.

[0057] In this embodiment, the groove wall of the limiting sliding groove 221 on the side away from the end surface of the second connecting joint 220 extends outward in its radial direction to form the above-mentioned limiting portion 223, which has a simple structure and is easy to manufacture. Of course, in other embodiments, the limiting portion 223 can also be a protruding structure provided on the exterior of the second connecting joint 220, which can also achieve the above-mentioned effect.

[0058] To achieve a sealed installation between the second connecting joint 220 and the first connecting joint 120, at least one sealing member 400 is further provided between the first connecting joint 120 and the second connecting joint 220. The sealing member 400 is located between the limiting sliding groove 221 and the end surface of the second connecting joint 220. The provision of the sealing member 400 prevents the fluid medium within the first valve 100 and the second valve 200 from leaking through the gap between the first connecting joint 120 and the second connecting joint 220.

[0059] In this embodiment, two sealing members 400 are provided to achieve a good sealing effect while reducing the number of sealing members 400, thereby lowering processing costs. The sealing members 400 are rubber sealing rings, which provide good sealing effects and are relatively low in cost. It should be noted that this embodiment does not limit the number of sealing members 400; the number of sealing members 400 can also be three, four, five, or even more.

[0060] To ensure the stability of the installation of the seal 400, in this embodiment, the outer wall of the second connecting joint 220 is provided with a receiving groove 222 for installing the seal 400, thereby preventing the seal 400 from falling off or shifting. Of course, in other embodiments, the receiving groove 222 can also be provided on the inner wall of the first connecting joint 120 to install the seal 400, which can also achieve the above-mentioned effect.

[0061] Figure 8 FIG. 3 shows a schematic structural diagram of the limit pin 300 provided in this embodiment. Figure 8 Combined with Figure 7 As shown, in this embodiment, the stop pin 300 is a single pin, that is, the stop pin 300 has a straight rod structure that can be directly inserted into the plug hole 1221, further enhancing the reliability of the connection and the convenience of the assembly process. Optionally, the end of the stop pin 300 also has a protruding handle 301 to facilitate the removal and installation of the stop pin 300. It should be noted that during actual installation, the stop pin 300 can be inserted into the plug hole 1221 from either end, further improving the convenience of assembly between the first valve 100 and the second valve 200.

[0062] To facilitate processing, in this embodiment, the first connecting joint 120 and the first valve body 110 are an integrally molded structure; the second connecting joint 220 and the second valve body 210 are an integrally molded structure. This arrangement can omit the assembly process between multiple parts, thereby improving assembly efficiency; and can reduce leakage points on the first valve 100 or the second valve 200, thereby improving the safety of the valve assembly.

[0063] like Figure 2 and Figure 4 As shown, to facilitate the sequential connection between multiple valves and multiple pipelines in a pipeline connection, the other end of the first valve 100 is further formed with a second connection joint 220, and the other end of the second valve 200 is further formed with a first connection joint 120. In other words, the first valve 100 forms a first connection joint 120 and a second connection joint 220 at both ends, respectively, and the second valve 200 forms a first connection joint 120 and a second connection joint 220 at both ends. During connection, the first connection joint 120 of the first valve 100 is plugged into the second connection joint 220 of the second valve 200, and the second connection joint 220 of the first valve 100 can be plugged into other valves or pipelines in the pipeline, and the first connection joint 120 of the second valve 200 can be plugged into other valves or pipelines in the pipeline.

[0064] Example 2

[0065] This embodiment provides a plug-in assembly, the specific structure of which is substantially the same as that of the plug-in assembly in the first embodiment, except that the structure of the plug-in hole 1221 is different.

[0066] Figure 9 FIG. 1 shows a partial structural diagram of the first valve 100 provided in this embodiment. Figure 10 A schematic cross-sectional view (partial) of the plug-in assembly provided in this embodiment is shown. Figure 9-10As shown, in this embodiment, the plug hole 1221 is a blind hole. By setting the plug hole 1221 as a blind hole, the end of the plug hole 1221 without an opening can play a role in limiting the limit pin 300, so as to prevent the limit pin 300 from falling off during use.

[0067] In this embodiment, when manufacturing the first connector 120, the opening of the insertion hole 1221 can be positioned upward to facilitate insertion of the stop pin 300 and provide a better stop. It should be noted that the "upper" in "the opening of the insertion hole 1221 is positioned upward" refers to the upper side of the connector assembly during actual installation and use.

[0068] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the scope of protection of the present invention.

Claims

1. A plug assembly for connecting a first component and a second component, characterized in that: The plug-in assembly comprises: A first connecting joint (120) is formed at one end of the first component, and the first connecting joint (120) is provided with a plug hole (1221) connected to the internal flow channel thereof; A second connecting joint (220) is formed at one end of the second component, the first connecting joint (120) is sealed and sleeved outside the second connecting joint (220), and a limiting sliding groove (221) is provided on the outer wall of the second connecting joint (220); A limit pin (300) is inserted into the plug-in hole (1221), and a portion of the limit pin (300) is located in the limit slot (221). The portion of the limit pin (300) located in the limit slot (221) forms a fitting portion, and the fitting portion can abut against the groove wall of the limit slot (221) on the side close to the end face of the second connecting joint (220) to limit the first connecting joint (120) and the second connecting joint (220) that are plugged in in the axial direction; the maximum dimension of the fitting portion in the axial direction of the second connecting joint (220) is smaller than the dimension of the limit slot (221) in the axial direction of the second connecting joint (220).

2. The plug assembly according to claim 1, characterized in that The first connecting joint (120) comprises a main body (121) and an extension portion (122) arranged along a tangential direction of the main body (121), and the plug hole (1221) is provided in the extension portion (122).

3. The plug assembly according to claim 2, characterized in that The axial direction of the plug hole (1221) is parallel to the radial direction of the main body (121), and the middle part of the plug hole (1221) is connected to the internal flow channel of the first connecting joint (120), the limit pin (300) is inserted into the plug hole (1221), and the matching part is formed on the side of the limit pin (300).

4. The plug assembly according to claim 1, characterized in that A limiting portion (223) is provided on the outer wall of the second connecting joint (220), and the limiting portion (223) is located on a side of the limiting sliding groove (221) away from the end face of the second connecting joint (220). The limiting portion (223) can abut against the end face of the first connecting joint (120) to limit the sliding distance of the first connecting joint (120) relative to the second connecting joint (220).

5. The plug assembly according to claim 1, characterized in that The plug-in hole (1221) is a through hole or a blind hole.

6. The plug assembly according to claim 1, characterized in that At least one sealing member (400) is further provided between the first connecting joint (120) and the second connecting joint (220), and the sealing member (400) is located between the limiting sliding groove (221) and the end surface of the second connecting joint (220).

7. The plug assembly according to claim 1, characterized in that The limiting pin (300) is a single latch pin.

8. The plug assembly according to claim 1, characterized in that The limiting sliding groove (221) is an annular groove.

9. The plug assembly according to any one of claims 1 to 8, characterized in that: The first component is a first valve (100); and / or the second component is a second valve (200).

10. The plug assembly according to claim 9, characterized in that: The first valve (100) is a pressure reducing valve, a check valve, a gate valve, a ball valve or a stop valve; and / or The second valve (200) is a pressure reducing valve, a check valve, a gate valve, a ball valve or a stop valve.

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