Plug-in assembly

Abstract

The utility model discloses a plug-in assembly, and belongs to the technical field of valves. The plug-in assembly comprises a first connecting joint, a second connecting joint and a limiting clamp, the first connecting joint is formed at one end of the first component, and a first limiting protrusion is arranged on the outer wall of 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 second limiting protrusion is arranged on the outer wall of the second connecting joint; the first connecting joint and the second connecting joint which are connected in an inserted mode are sleeved with the limiting hoop, a limiting groove is formed in the inner side of the limiting hoop, and the first limiting protrusion and the second limiting protrusion are both limited in the limiting groove. The plug-in assembly can solve the technical problems that existing valves are connected through double nipple connectors and raw material belts, leakage is prone to occurring, mounting and dismounting are tedious, and the mounting angle is inaccurate.

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] Valves are widely used in various industries. In order to meet the needs of complex working conditions, it is sometimes necessary to use two or more valves in series. In the water industry, multiple valves (such as ball valves, gate valves or pressure reducing valves, etc.) are usually installed on the front and rear sides of the water meter installed in the water meter box at the front end of the household. During installation, there are situations where two valves are connected in series. For example: the gate valve and check valve on the front side of the water meter are connected in series. When the two are connected, a threaded joint is usually set between the gate valve and the check valve. One end of the threaded joint is threadedly connected to the gate valve, and the other end of the threaded joint is threadedly connected to the check valve. However, threaded connections usually have the following problems during assembly and disassembly:

[0003] 1) The installation process is cumbersome. First, to ensure a good seal, threaded connections typically require wrapping with raw tape during installation. If the tape is wrapped too thickly, the connection won't mate, while if it's wrapped too thinly, leakage is likely to occur. Furthermore, connecting the two ends of the threaded joint to the valves on either side creates two leak points in the entire valve assembly, further increasing the risk of leakage.

[0004] 2) Low installation efficiency and inconvenient disassembly. In order to ensure a tight fit, installation tools such as wrenches must be used during the actual installation process. However, the installation space of the entire pipeline is very compact, which increases the difficulty of operation and inconveniences in maintenance.

[0005] 3) Inaccurate installation angle. Since the two ends of the threaded connector are connected to the valves on both sides, when they are tightened together, the angle between the two valves often deviates from the expected angle.

[0006] Therefore, there is an urgent need to provide a plug-in assembly to solve the above problems. Utility Model Content

[0007] The present invention aims to solve or at least alleviate some or all of the above problems. To this end, the present invention aims to provide a plug-in assembly that solves the technical problems of existing valve connections using threaded connectors and raw tape, which are prone to leakage, are cumbersome to install and disassemble, and have inaccurate installation angles.

[0008] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0009] A plug-in assembly for connecting a first component and a second component, the plug-in assembly comprising:

[0010] A first connecting joint is formed at one end of the first component, and a first limiting protrusion is provided on an outer wall of the first connecting joint;

[0011] 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 second limiting protrusion is provided on the outer wall of the second connecting joint;

[0012] The limiting clamp is sleeved on the outside of the first connecting joint and the second connecting joint that are plugged into each other, and a limiting groove is provided on the inner side of the limiting clamp, and the first limiting protrusion and the second limiting protrusion are both limited in the limiting groove.

[0013] As a preferred solution, the sum of the thickness of the first limiting protrusion and the thickness of the second limiting protrusion is less than or equal to the width of the limiting groove along the axial direction of the first connecting joint.

[0014] As a preferred solution, the limiting clamp includes at least two sub-circuit rings, each of which is connected end to end in a ring shape, and an arc groove is provided on the inner side of each sub-circuit ring, and each arc groove is connected to form the limiting groove.

[0015] As a preferred solution, the split snap ring includes a snap ring body and connecting ears connected to both ends of the snap ring body, and the connecting ears of two adjacent split snap rings are detachably connected by fasteners.

[0016] As a preferred solution, the clamping ring body and the two connecting ears connected to its two ends are an integrally formed structure.

[0017] As a preferred solution, the limiting groove is an annular groove.

[0018] As a preferred solution, the first limiting protrusion is an annular protrusion; or there are multiple first limiting protrusions, and the first limiting protrusions are arranged at intervals along the circumference of the first connecting joint; and / or

[0019] The second limiting protrusion is an annular protrusion; or there are multiple second limiting protrusions, and the second limiting protrusions are arranged at intervals along the circumference of the second connecting joint.

[0020] As a preferred solution, there are multiple first limiting protrusions, each of which is arranged at intervals along the circumference of the first connecting joint, and each of the first limiting protrusions corresponds to one second limiting protrusion and one limiting groove.

[0021] As a preferred solution, at least one sealing member is provided between the first connecting joint and the second connecting joint.

[0022] As a preferred solution, the first component is a first valve or a first pipeline; and / or the second component is a second valve or a second pipeline.

[0023] As a preferred solution, the first valve is a pressure reducing valve, a check valve, a ball valve, a gate valve or a stop valve; and / or

[0024] The second valve is a pressure reducing valve, a check valve, a ball valve, a gate valve or a stop valve.

[0025] The beneficial effects of the present invention are:

[0026] The plug-in assembly provided by the present invention can be used for stable connection between a first component and a second component. When connecting, the second connecting joint can be inserted into the first connecting joint first; after being plugged into place, the limiting clamp is sleeved on the outside of the plugged first connecting joint and the second connecting joint. At this time, the first limiting protrusion and the second limiting protrusion are both limited in the limiting groove of the limiting clamp, thereby playing the role of axially limiting the first component and the second component, and preventing the two from being separated during use. The plug-in assembly omits the threaded joint in the prior art, and the first component and the second component can be directly plugged in and docked, which simplifies the assembly process, reduces the difficulty of assembly, and can reduce the leakage points at the connection position to reduce the probability of leakage; in addition, the plugged first component and the second component can also rotate relative to each other before the limiting clamp is sleeved to adjust the installation angle between the two, thereby ensuring that the two can be accurately installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] Figure 1 This is a structural diagram of the plug-in assembly provided in the first embodiment of the present utility model;

[0029] Figure 2 This is a partial structural diagram of the first pipeline provided in Example 1 of the present utility model;

[0030] Figure 3 This is a cross-sectional schematic diagram of the first pipeline provided in Example 1 of the present utility model;

[0031] Figure 4 This is a partial structural diagram of the second pipeline provided in Example 1 of the present utility model;

[0032] Figure 5 This is a cross-sectional schematic diagram of the second pipeline provided in Example 1 of the present utility model;

[0033] Figure 6 This is a schematic cross-sectional view of the plug-in assembly provided in the first embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the exploded structure of the plug-in assembly provided in the first embodiment of the present utility model;

[0035] Figure 8 This is a structural diagram of the split clamp ring provided in Example 1 of the present utility model;

[0036] Figure 9 This is a first cross-sectional schematic diagram of the plug-in assembly provided in the second embodiment of the present utility model;

[0037] Figure 10 This is a second cross-sectional schematic diagram of the plug-in assembly provided in the second embodiment of the present utility model.

[0038] Reference numerals:

[0039] 100, first pipeline; 110, first pipe body; 120, first connecting joint; 121, first limiting protrusion;

[0040] 200, second pipeline; 210, second pipe body; 220, second connecting joint; 221, second limiting protrusion; 222, accommodating groove;

[0041] 300, split clasp; 310, clasp body; 311, limiting groove; 320, connecting ear;

[0042] 400, fasteners;

[0043] 500. Seals. DETAILED DESCRIPTION

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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).

[0049] 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.

[0050] 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.

[0051] 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.

[0052] For ease of understanding, the plug-in assembly provided by the present invention is described in detail below using two connected pipelines as an example through multiple embodiments.

[0053] Example 1

[0054] 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 pipeline 100 provided in this embodiment. Figure 3 FIG. 1 shows a schematic cross-sectional view of the first pipeline 100 provided in this embodiment. Figure 4 FIG. 2 shows a partial structural diagram of the second pipeline 200 provided in this embodiment. Figure 5 FIG. 2 shows a cross-sectional view of the second pipeline 200 provided in this embodiment. Figure 1-Figure 5 As shown, this embodiment provides a plug assembly for connecting a first component (first pipeline 100) and a second component (second pipeline 200). Figure 3 As the dotted line in the figure, the first pipeline 100 includes a first pipe body 110 and a first connecting joint 120 connected to each other; Figure 5The dashed line in the figure is used as the boundary, and the second pipeline 200 includes a second pipe body 210 and a second connecting joint 220. When connected, the first connecting joint 120 is sealed and placed outside the second connecting joint 220, so that the first connecting joint 120 and the second connecting joint 220 are connected and the media inside the first pipeline 100 and the second pipeline 200 can flow between them.

[0055] Figure 6 FIG. 1 shows a cross-sectional structural diagram of the plug-in assembly provided in this embodiment. Figure 6 and combined Figure 2-Figure 5 As shown, the plug-in assembly also includes a limiting clamp, and a first limiting protrusion 121 is provided on the outer wall of the first connecting joint 120; a second limiting protrusion 221 is provided on the outer wall of the second connecting joint 220; the limiting clamp is sleeved on the outside of the first connecting joint 120 and the second connecting joint 220 that are plugged in, and a limiting groove 311 is provided on the inner side of the limiting clamp, and the first limiting protrusion 121 and the second limiting protrusion 221 are both limited in the limiting groove 311.

[0056] The plug-in assembly provided in this embodiment can be used for a stable connection between the first pipeline 100 and the second pipeline 200. When connecting, the second connecting joint 220 can be inserted into the first connecting joint 120 first; after the connection is in place, the limiting clamp is sleeved on the outside of the first connecting joint 120 and the second connecting joint 220. At this time, the first limiting protrusion 121 and the second limiting protrusion 221 are both limited in the limiting groove 311 of the limiting clamp, thereby playing the role of axially limiting the first pipeline 100 and the second pipeline 200, and preventing the two from being separated during use. The plug-in assembly omits the threaded joint of the prior art. The first pipeline 100 and the second pipeline 200 can be directly plugged in and docked, which simplifies the assembly process, reduces the difficulty of assembly, and can reduce the leakage points at the connection position to reduce the probability of leakage. In addition, the first pipeline 100 and the second pipeline 200 can also rotate relative to each other before the limiting clamp is sleeved to adjust the installation angle between the two, thereby ensuring that they can be accurately installed.

[0057] Figure 7 A schematic diagram of the exploded structure of the plug-in assembly provided in this embodiment is shown. Figure 8 FIG. 3 shows a schematic structural diagram of the split clamp ring 300 provided in this embodiment. Figure 7-Figure 8As shown, the retaining clamp includes at least two separate retaining rings 300, each of which is connected end to end to form a ring. Each retaining ring 300 has an inner side provided with an arcuate groove, which connects to form the aforementioned retaining groove 311. By configuring the retaining clamp as at least two separate retaining rings 300, the retaining clamp can be easily assembled with the first and second connectors 120, 220. After the first and second connectors 120, 220 are connected, the operator simply aligns the arcuate grooves of the retaining rings 300 with the first and second retaining protrusions 121, 221, and the retaining clamp is easily assembled. This is simple, convenient, and easy to operate. In this embodiment, there are two retaining rings 300, each of which is semicircular in shape. This further ensures the ease of installation of the retaining clamp, meaning the operator only needs to install it twice, improving assembly efficiency. Of course, in other embodiments, the number of retaining rings 300 can also be three, four, five, or even more, and this is not limited here.

[0058] Specifically, each sub-circuit clasp 300 includes a circuit clasp body 310 and connecting ears 320 connected to both ends of the circuit clasp body 310. The connecting ears 320 of two adjacent sub-circuit clasps 300 are detachably connected via fasteners 400. Connecting two adjacent sub-circuit clasps 300 using fasteners 400 can improve the overall stability of the limit clamp and prevent it from falling off during use, which would affect the safety of the entire pipeline system. In this embodiment, the fasteners 400 are bolt-nut assemblies, and the connecting ears 320 are each provided with a connecting hole. After the bolts of the fasteners 400 pass through the connecting holes of the two mating connecting ears 320 in sequence, the nut of the fastener 400 is screwed onto one end of the bolt passing through the connecting hole and pressed against the surface of the connecting ear 320, thereby achieving a stable connection between the two adjacent sub-circuit clasps 300.

[0059] In this embodiment, the snap ring body 310 and the two connecting ears 320 connected to its two ends are an integrally formed structure. This arrangement facilitates the processing of the snap ring 300 and can save the steps of assembling multiple parts together, thereby improving processing efficiency.

[0060] Optionally, the limiting groove 311 formed by the arc-shaped grooves on each sub-clamping ring 300 is an annular groove. This design not only facilitates processing, but also, when the plug-in assembly is used in a valve connection structure, after the limiting clamp, first connecting joint 120, and second connecting joint 220 are assembled, the first connecting joint 120 and the second connecting joint 220 can rotate 360 degrees relative to each other to adjust the insertion angle between the two connected valves, thereby ensuring the performance of the entire valve connection structure.

[0061] In one example, the first limiting protrusion 121 and the second limiting protrusion 221 are both annular protrusions. After the first connecting joint 120 and the second connecting joint 220 are plugged in, the first limiting protrusion 121 and the second limiting protrusion 221 fit together and are simultaneously accommodated in the limiting groove 311 of the limiting clamp.

[0062] In another example, there are multiple first limiting protrusions 121, each of which is spaced apart along the circumference of the first connecting joint 120; and there are multiple second limiting protrusions 221, each of which is spaced apart along the circumference of the second connecting joint 220. In this case, when the first connecting joint 120 and the second connecting joint 220 are plugged together, each first limiting protrusion 121 can directly face a second limiting protrusion 221, or multiple first limiting protrusions 121 and multiple second limiting protrusions 221 can be staggered and simultaneously accommodated in the limiting groove 311 of the limiting clamp. This design can also achieve stable positioning of the limiting clamp on the plugged first connecting joint 120 and the second connecting joint 220.

[0063] Of course, in another example, it can also be set as follows: one of the first limiting protrusion 121 and the second limiting protrusion 221 is an annular protrusion, and the other is multiple and is arranged at circumferential intervals along the corresponding connecting joint. This setting method can also achieve the above effect.

[0064] like Figure 6 As shown, in this embodiment, the sum of the thickness of the first limiting protrusion 121 and the thickness of the second limiting protrusion 221 is equal to the width of the limiting groove 311 along the axial direction of the first connecting joint 120, that is, the first limiting protrusion 121 and the second limiting protrusion 221 connected to each other are just accommodated in the limiting groove 311 of the limiting clamp. After being plugged in, the first pipeline 100 and the second pipeline 200 are fixed in their axial positions, and the two cannot undergo relative displacement along their own axial directions. This design can further improve the stability of the assembly of the first pipeline 100 and the second pipeline 200.

[0065] Continue as Figure 5 and Figure 6 As shown, to achieve a sealed installation between the second connecting joint 220 and the first connecting joint 120, at least one sealing member 500 is further provided between the first connecting joint 120 and the second connecting joint 220. The provision of the sealing member 500 can prevent the fluid medium in the first pipeline 100 and the second pipeline 200 from leaking through the gap between the first connecting joint 120 and the second connecting joint 220.

[0066] In this embodiment, there are two sealing members 500, which further enhances the sealing effect between the second connection joint 220 and the first connection joint 120. While ensuring a tight seal between the two, the number of sealing members 500 can be reduced, thereby reducing manufacturing costs. The sealing members 500 are rubber sealing rings, which provide excellent sealing effects and are relatively low in cost. It should be noted that this embodiment does not impose a limitation on the number of sealing members 500; the number of sealing members 500 can also be three, four, five, or even more.

[0067] To ensure the stability of the installation of the seal 500, in this embodiment, the outer wall of the second connecting joint 220 is provided with a receiving groove 222 for installing the seal 500, thereby preventing the seal 500 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 500, which can also achieve the above-mentioned effect.

[0068] Example 2

[0069] 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 thicknesses of the first limiting protrusion 121 and the second limiting protrusion 221 are different.

[0070] Figure 9 A first cross-sectional schematic diagram of the plug-in assembly provided in this embodiment is shown. Figure 10 FIG2 shows a second cross-sectional view of the plug assembly provided in this embodiment. Figure 9-10 As shown, in this embodiment, the sum of the thicknesses of the first limiting protrusion 121 and the second limiting protrusion 221 is less than the width of the limiting groove 311 along the axial direction of the first connecting joint 120. In other words, after the limiting clamp is sleeved over the first connecting joint 120 and the second connecting joint 220, the first connecting joint 120 and the second connecting joint 220 can still be extended and retracted along their respective axes, leaving ample space for connecting or removing the two connected valves or pipelines, or the valve and pipeline, from or from the corresponding pipelines, thereby reducing operator difficulty and improving assembly and disassembly efficiency.

[0071] Specifically, the specific steps for installing the two pipes (pipe connection structure) connected by the plug-in assembly in the corresponding pipe are as follows: 1) first move the two pipes 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) connect one end of the pipe connection structure (the end of the first pipe 100 away from the second pipe 200 or the end of the second pipe 200 away from the first pipe 100) into the corresponding pipe; 3) move the two pipes along the axial direction of the second connecting joint 220 so that the dimension of the pipe connection structure along the axial direction of the second connecting joint 220 matches the dimension of the corresponding connection position, and then connect the other end of the pipe connection structure into the corresponding pipe. The above arrangement can provide sufficient installation and disassembly space for the assembly process, with low operation difficulty and high disassembly efficiency.

[0072] Example 3

[0073] 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 shape of the limiting groove 311 is different.

[0074] Reference Figure 9 and Figure 10 In this embodiment, there are multiple first limiting protrusions 121, each of which is spaced apart along the circumference of the first connecting joint 120, and each first limiting protrusion 121 corresponds to a second limiting protrusion 221 and a limiting groove 311. When the first connecting joint 120 and the second connecting joint 220 are plugged into each other, each first limiting protrusion 121 can be aligned with a second limiting protrusion 221, and the aligned first limiting protrusions 121 and second limiting protrusions 221 can be restrained and accommodated in the same corresponding limiting groove 311. It is understood that after the plug-in assembly is assembled, the first connecting joint 120 and the second connecting joint 220 cannot move relative to each other along their respective axes. Therefore, the installation angle of the first connecting joint 120 and the second connecting joint 220 should be adjusted before installing the limiting clamp.

[0075] 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 connection joint (120) is formed at one end of the first component, and a first limiting protrusion (121) is provided on an outer wall of the first connection joint (120); A second connection joint (220) is formed at one end of the second component, the first connection joint (120) is sealed and sleeved outside the second connection joint (220), and a second limiting protrusion (221) is provided on the outer wall of the second connection joint (220); A limiting clamp is sleeved outside the first connecting joint (120) and the second connecting joint (220) that are plugged into each other, and a limiting groove (311) is provided on the inner side of the limiting clamp, and the first limiting protrusion (121) and the second limiting protrusion (221) are both limited in the limiting groove (311).

2. The plug assembly according to claim 1, characterized in that The sum of the thickness of the first limiting protrusion (121) and the thickness of the second limiting protrusion (221) is less than or equal to the width of the limiting groove (311) along the axial direction of the first connecting joint (120).

3. The plug assembly according to claim 1, characterized in that The limiting clamp comprises at least two sub-clamping rings (300), each of the sub-clamping rings (300) being connected end to end in sequence to form a ring shape, an arc-shaped groove being provided on the inner side of each sub-clamping ring (300), and each of the arc-shaped grooves being connected to form the limiting groove (311).

4. The plug assembly according to claim 3, characterized in that The split snap ring (300) comprises a snap ring body (310) and connecting ears (320) connected to both ends of the snap ring body (310), and the connecting ears (320) of two adjacent split snap rings (300) are detachably connected via a fastener (400).

5. The plug assembly according to claim 1, characterized in that The limiting groove (311) is an annular groove.

6. The plug assembly according to claim 5, characterized in that: The first limiting protrusion (121) is an annular protrusion; or there are a plurality of first limiting protrusions (121), each of which is arranged at intervals along the circumference of the first connecting joint (120); and / or The second limiting protrusion (221) is an annular protrusion; or the number of the second limiting protrusions (221) is multiple, and each of the second limiting protrusions (221) is arranged at intervals along the circumference of the second connecting joint (220).

7. The plug assembly according to claim 1, characterized in that There are multiple first limiting protrusions (121), each of which is arranged at intervals along the circumference of the first connecting joint (120), and each of the first limiting protrusions (121) corresponds to one second limiting protrusion (221) and one limiting groove (311).

8. The plug assembly according to claim 1, characterized in that At least one sealing member (500) is provided between the first connection joint (120) and the second connection joint (220).

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

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

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