Adapter

Abstract

The utility model discloses an adapter, a first joint of the adapter can be communicated with a first external pipeline component with an inserting joint, and a second joint of the adapter can be communicated with an external joint of a second external pipeline component, so that indirect communication between the first external pipeline component and the second external pipeline component is realized. And the situation that installation and butt joint are difficult to complete due to mismatching of outer joint structures of pipeline components is avoided. The adapter comprises a first connector and a second connector. Wherein the first joint is a male joint or a female joint, and the second joint is used for being matched and butted with an external joint. The male connector is in a hollow tube shape, a limiting groove is formed in the outer surface of the male connector, and the female connector is in a hollow tube shape and is provided with an insertion hole penetrating through the side wall of the female connector.

Description

Technical Field

[0001] This utility model relates to the field of mechanical connection technology, and in particular to an adapter. Background Technology

[0002] A pipeline is a device used to transport gases, liquids, or fluids containing solid particles. A pipeline can connect multiple pipeline components, including but not limited to valves and pipes. Within a pipeline, it is often necessary to connect valves to valves, pipes to valves, and pipes to pipes. The connection methods and structures of pipelines are diverse, such as tightening and fixing with clamps, tightening with external and internal threads, and plugging and fixing with pins, sockets, and limiting grooves.

[0003] When disassembling and repairing some existing pipeline systems, it is often difficult to directly connect the joints between the various components. For example, valves with plug-in joints are difficult to install directly on existing threaded pipe joints, or when the plug-in joints of two pipeline components are not the same size, there is an urgent need to provide an adapter component that can convert plug-in joints. Utility Model Content

[0004] This utility model provides an adapter, the purpose of which is to overcome the above-mentioned problems existing in the assembly process of the prior art.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An adapter includes a first connector and a second connector. The first connector is either a male connector or a female connector, and the second connector is used for mating and connecting with an external connector. The male connector is formed into a hollow tube shape and has a limiting groove on its outer surface. The female connector is formed into a hollow tube shape and has an insertion hole penetrating through the side wall of the female connector.

[0007] As an optional technical solution, the second connector can be either a male or female connector. This allows the adapter to be used in situations where the external connector consists of two plug-in connectors that are not compatible with each other, such as two male connectors, two female connectors, or one male connector and one female connector that are not compatible in size.

[0008] As an optional technical solution, the second connector can be any one of a union nut connector, an internal thread connector, an external thread connector, or a thermofusion connector. This allows the adapter to be used when one external connector is a plug connector and the other is a conventional thread connector or a thermofusion connector. The union nut can maintain the orientation of the two pipeline components, so that the orientation of the connectors on both sides of the adapter can be freely adjusted.

[0009] As an optional technical solution, the adapter also includes a main body section and an expansion joint. The first and second connectors are located on opposite sides of the main body section. One end of the expansion joint is retractably connected to the main body section, while the other end is fixedly connected to either the first or second connector. This retractable adapter can bridge the distance between two pipe component joints, making it suitable for more complex installation environments.

[0010] As an optional technical solution, the limiting groove is perpendicular to the central axis of the male connector. For male connectors made of metal, the annular limiting groove can be directly manufactured by turning, which is easier to process.

[0011] As an optional technical solution, the limiting groove is set around the entire circumference of the male connector. During the process of a set of matching male connectors being inserted into the female connector, the male connector can rotate 360° around the central axis, thereby adjusting the orientation of the corresponding pipeline components of the male and female connectors. Moreover, during assembly, there is no need to align the socket and the limiting groove, and the pin can be inserted and matched with the limiting groove for limiting engagement, making installation more convenient.

[0012] As an optional technical solution, one or more sealing rings are fitted on the outer surface of the male connector, with the sealing rings protruding from the outer surface of the male connector. At least one sealing ring is disposed between the outer end of the male connector and the limiting groove. When the male connector is inserted into the female connector for mating, the sealing rings fitted on the outer surface of the male connector are compressed and deformed, thereby pressing them between the inner surface of the female connector and the outer surface of the male connector. Furthermore, the first sealing ring is closer to the outer end of the male connector, which can achieve a sealing effect on the connection structure between the female connector and the male connector, preventing the medium from leaking out from the connection point of the female connector and the male connector.

[0013] As an optional technical solution, the male connector is a hollow cylinder, and the outer diameter of the limiting groove on the side near the outer end of the male connector is smaller than the outer diameter of the side of the limiting groove away from the outer end. Since the sealing ring protrudes from the surface of the male connector, and the outer surface of the male connector needs to be flush with the inner surface of the corresponding female connector, the sealing ring is prone to twisting and breaking when the male connector is inserted into the matching female connector for installation. By appropriately reducing the outer diameter of the limiting groove on the side near the outer end, friction between the sealing ring and the inner wall of the female connector can be avoided.

[0014] As an optional technical solution, the socket can be either a through hole or a blind hole. For a through hole, the pin can pass completely through the socket, which can increase the reliability of the plug-in structure; for a blind hole, the opening is only on the side where the pin is inserted, which provides better sealing.

[0015] As an optional technical solution, the female connector includes a main body and a boss, with a socket formed within the boss. The boss increases the length of the socket, thereby improving the reliability of the plug-in structure composed of the pin and the socket.

[0016] The beneficial effects of this utility model are:

[0017] According to the adapter provided by this utility model, the first connector of the adapter can communicate with a first external pipeline component having a plug-in connector, and the second connector of the adapter can communicate with the external connector of a second external pipeline component, thereby realizing indirect communication between the first and second external pipeline components and avoiding the situation where the external connector structures of the pipeline components are incompatible, leading to difficulties in installation and docking. In particular, the adapter is connected to the first external pipeline component through a plug-in structure, which is convenient for disassembly and assembly and has a low risk of leakage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an adapter provided in the first embodiment of this utility model.

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of a pair of matching male and female connectors in the plugged-in state provided in the second embodiment of this utility model.

[0020] Figure 3 This is a schematic diagram of the axial cross-sectional structure of a pair of matching male and female connectors in the plugging state provided in the second embodiment of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of an adapter provided in the third embodiment of this utility model.

[0022] Figure 5 This is a schematic diagram of another adapter provided in the third embodiment of this utility model.

[0023] Figure 6 This is a schematic diagram of the structure of an adapter provided in the fourth embodiment of this utility model.

[0024] Figure 7 This is a schematic diagram of another adapter provided in the fourth embodiment of this utility model.

[0025] Figure 8 This is a schematic diagram of the structure of an adapter with a telescopic section provided in the fourth embodiment of this utility model.

[0026] Figure 9 This is a schematic diagram of the structure of an adapter provided in the fifth embodiment of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100-Adapter, 200-First external piping component, 300-Second external piping component, 1-First connector, 2-Second connector, 11-Male connector, 111-Limiting groove, 112-First sealing ring, 113-Second sealing ring, 12-Female connector, 121-Socket, 122-Protrusion, 123-Main body, 31-External threaded connector, 4-Single pin; 5-Main body section; 6-Telescopic section. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] 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.

[0032] In the description of this embodiment, the terms "upper," "lower," "left," and "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.

[0033] First Embodiment

[0034] Figure 1This is a structural schematic diagram of an adapter 100 provided in the first embodiment of this utility model. Figure 1 As shown, the adapter 100 includes a first connector 1 and a second connector 2. The first connector 1 is a male connector 11 or a female connector 12 of a plug-in connector, used to connect with a first external pipeline component 200 having a plug-in connector. The second connector 2 can be a connector of any structure, used to connect with a connector of a second external pipeline component 300.

[0035] It should be noted that the first external piping component 200 and the second external piping component 300 can be any piping component with external connectors, such as valves, straight pipes, tees, adapters 100, etc., and are not limited here. When it is necessary to connect the first external piping component 200 and the second external piping component 300, it is necessary to connect the external connector of the first external piping component 200 with the external connector of the second external piping component 300. The external connector of the first external piping component 200 is a plug-in connector, specifically a male connector 11 or a female connector 12. Taking the male connector 11 of the first external piping component 200 as an example, the external connector of the second external piping component 300 is a connector that cannot match the external connector of the first external piping component 200. For example, the external connector of the second external piping component 300 may be an external thread connector 31, an internal thread connector, a heat fusion connector, a male connector 11 of a plug-in connector, or a female connector 12 whose size does not match the male connector 11 of the first external piping component 200. Taking the external thread connector 31 as an example, the external connectors of the first external piping component 200 and the second external piping component 300 cannot be directly connected.

[0036] The adapter 100 provided in this embodiment has two connectors, which are located at both ends of the adapter 100 and are used to indirectly connect the external connectors of the first external pipeline component 200 and the second external pipeline component 300. The first connector 1 of the adapter 100 is formed as a female connector 12 that matches the plug-in connector of the first external pipeline component 200, and the other side is formed as an internal thread connector that matches the external connector of the second external pipeline component 300. When assembling the first external pipeline component 200 and the second external pipeline component 300, it is only necessary to connect the first connector 1 of the adapter 100 to the external connector of the first external pipeline component 200, and then connect the external connector of the second external pipeline component 300 to the second connector 2 to complete the connection between the first external pipeline component 200 and the second external pipeline component 300. Similarly, depending on the actual application scenario, the first connector 1 of the adapter 100 may be formed as a male connector 11, and the second connector 2 may be formed as other connector structures. This invention is also applicable in this case.

[0037] In this embodiment, the first connector 1 of the adapter 100 can communicate with the first external piping component 200 having a plug-in connector, and the second connector 2 of the adapter 100 can communicate with the external connector of the second external piping component 300, thereby achieving indirect communication between the first external piping component 200 and the second external piping component 300, avoiding situations where the external connector structures of the piping components are mismatched, leading to difficulties in installation and docking. In particular, the adapter 100 and the first external piping component 200 are connected through a plug-in structure, which is convenient for disassembly and assembly and has a low risk of leakage.

[0038] Second Implementation Method

[0039] In the second embodiment of this utility model, the structure of the plug connector is described in detail with reference to the accompanying drawings.

[0040] In this embodiment, the term "plug connector" refers to a pair of mating male connector 11 and female connector 12 that can be plugged into each other. Specifically, Figure 2 The example shows a cross-sectional structural diagram of a pair of matching male connectors 11 and female connectors 12 in the plugged-in state. Figure 3 This is a schematic diagram of the axial cross-sectional structure of a pair of matched male connector 11 and female connector 12 in their plugged-in state. (Combined with...) Figure 2 and Figure 3 As can be seen, for a pair of matching male connectors 11 and female connectors 12, the male connector 11 is inserted and fixed by extending into the female connector 12, thereby achieving direct radial limiting of the male connector 11 and female connector 12. Furthermore, a limiting groove 111 is formed on the outer surface of the male connector 11, and a corresponding insertion hole 121 is formed on the upper surface of the female connector 12, which penetrates the side wall of the female connector 12. A separately provided pin is inserted into the insertion hole 121 and limited within the limiting groove 111, so that the male connector 11 and female connector 12 can be limited both radially and axially. While the male connector 11 and female connector 12 can be quickly disassembled and assembled, the installation stability between the male connector 11 and female connector 12 can also be guaranteed.

[0041] It should be noted that although "plug-in connector" refers to a pair of matching male connector 11 and female connector 12, the first connector 1 is formed as either male connector 11 or female connector 12. Here, the male connector 11 or female connector 12 of the first connector 1 is a matching plug-in connector with the external connector of the first external piping component 200. If the second connector 2 is also a male connector 11 or female connector 12, then the male connector 11 or female connector 12 of the second connector 2 is a matching plug-in connector with the external connector of the second external piping component 300. That is, the dimensions of the first connector 1 and the second connector 2 are not limited to matching.

[0042] The following description uses a pair of mating male connectors 11 and female connectors 12 to illustrate the mating structure of the plug-in connectors.

[0043] A limiting groove 111 is provided on the outer surface of the male connector 11. The limiting groove 111 can be provided completely around the entire circumference of the male connector 11, or it can be provided partially around the male connector 11. In the recommended embodiment, the limiting groove 111 is an annular groove that surrounds the entire circumference of the male connector 11. During the process of a set of matching male connectors 11 extending into the female connector 12, the male connector 11 can rotate 360° around the central axis, thereby adjusting the orientation of the corresponding pipeline components of the male connector 11 and the female connector 12. Moreover, during assembly, it is not necessary to align the socket 121 with the limiting groove 111. After the pin is inserted, it can be limited and engaged with the limiting groove 111, making installation more convenient. In a further preferred embodiment, the limiting groove 111 is perpendicular to the central axis of the male connector 11. When the male connector 11 is made of metal, the male connector 11 with the annular limiting groove 111 can be directly manufactured by turning, which is more convenient for processing.

[0044] The insertion hole 121 is on the female connector 12. When the male connector 11 extends into the female connector 12 to the installation position, the insertion hole 121 is axially aligned with the limiting groove 111. Thus, after the pin is inserted into the insertion hole 121, it extends into the limiting groove 111, thereby achieving axial limiting of the female connector 12 and the male connector 11. In the recommended embodiment, the insertion hole 121 can be set tangentially to the male connector 11, which facilitates the machining of the female connector 12 and the male connector 11, and the pin falls into the limiting groove 111 after being inserted into the insertion hole 121. The insertion hole 121 can be a through hole tangentially to the male connector 11 and extending through the female connector 12, which further facilitates machining, and the pin can be inserted from either side to achieve axial limiting of the female connector 12 and the male connector 11, improving the reliability of the valve connection structure.

[0045] The female connector 12 may further include a main body 123 and a boss 122, the boss 122 protruding from the main body 123, and a socket 121 formed within the boss 122. In a preferred embodiment, the boss 122 may extend tangentially along the female connector 12, thereby facilitating machining. The presence of the boss 122 helps ensure the insertion direction of the pin, particularly providing effective restraint for a single pin 4. In some embodiments, the socket 121 is open at only one end, forming a blind hole for better sealing.

[0046] During the installation of the female connector 12 and the male connector 11, the pin needs to extend into the socket 121 and engage with the limiting groove 111 on the surface of the male connector 11 for positioning. The specific structure of the pin is not limited here, as long as it can extend into the socket 121 and fall into the limiting groove 111. Depending on the application scenario, the pin can be a single pin 4, a U-shaped pin, etc. The above-mentioned simple replacement of the mating shape of the pin and the socket 121 are also within the protection scope of this utility model.

[0047] In some preferred embodiments, the pin may also be in contact with the bottom surface of the limiting groove 111. Furthermore, the pin may be tangential to the inner ring of the limiting groove 111. Thus, after insertion, the pin can fully extend into the limiting groove 111 and abut against the bottom surface of the limiting groove 111, thereby further improving the reliability of the limiting structure within the limiting groove 111 and reducing the risk of the pin dislodging from the limiting groove 111.

[0048] For a single pin 4 that is a straight rod, the pin may include an insertion part and an extension part. The insertion part matches the shape of the socket 121 and extends into the socket 121. The extension part is fixed to the end of the insertion part away from the socket 121. The extension part can serve as a handle during installation, allowing the user to hold or use tools to insert or remove the pin during assembly and disassembly, making assembly and disassembly more convenient.

[0049] For the case where the pin is U-shaped, the female connector 12 has two insertion holes 121. The two insertion holes 121 extend in the same direction and are mirror-symmetrical along the diameter of the female connector 12. This allows both ends of the U-shaped pin to simultaneously extend into both insertion holes 121, further improving the reliability of the insertion and fixing structure between the pin, insertion holes 121, and limiting groove 111. It also balances the limiting force at the connection point and improves stress concentration at a single insertion hole 121. It should be noted that this embodiment uses a U-shaped pin with two insertion holes 121 as an example, but it does not limit the use of two insertion holes 121 to a U-shaped pin. In some embodiments, two single pins 4 can be inserted into two insertion holes 121 respectively for limiting, which also falls within the scope of this utility model.

[0050] In some preferred embodiments, the valve connection structure has one or more sealing rings fitted onto the outer surface of the male connector 11. These sealing rings protrude from the outer surface of the male connector 11. Other structural details are the same and will not be elaborated here. The sealing rings include at least a first sealing ring 112 disposed between the outer end of the male connector 11 and the limiting groove 111. The outer end refers to the end of the female connector 12 facing the male connector 11, or the end of the male connector 11 facing the female connector 12, when a pair of mating female connectors 12 and male connectors 11 are assembled. When the male connector 11 is inserted into the female connector 12, the sealing ring fitted onto the outer surface of the male connector 11 is compressed and deformed, thereby pressing it between the inner surface of the female connector 12 and the outer surface of the male connector 11. Furthermore, the first sealing ring 112 is closer to the outer end of the male connector 11, thus achieving a sealing effect on the connection structure between the female connector 12 and the male connector 11, preventing the medium from leaking out from the connection point.

[0051] More preferably, two or more (>2) first sealing rings 112 can be provided to achieve a better sealing effect. The sealing rings may also include a second sealing ring 113, which is respectively disposed on both sides of the limiting groove 111. The second sealing ring 113 provides a second layer of protection for the seal between the male connector 11 and the female connector 12, further enhancing the sealing effect. Furthermore, after assembly, the second sealing ring 113 is closer to the outer end of the female connector 12, which can balance the compressive force exerted by the first sealing ring 112 on the inner surface of the female connector 12, thereby improving the bending resistance of the pipeline at the connection point and providing effective protection for the first sealing ring 112.

[0052] Preferably, the outer diameter of the limiting groove 111 on the side near the outer end of the male connector 11 is smaller than the outer diameter of the side of the limiting groove 111 away from the outer end. Since the sealing ring protrudes from the surface of the male connector 11, and the outer surface of the male connector 11 needs to be flush with the inner surface of the corresponding female connector 12, the sealing ring is prone to twisting and breaking due to friction with the inner wall of the female connector 12 when the male connector 11 is inserted into the matching female connector 12 for installation. By appropriately reducing the outer diameter of the limiting groove 111 on the side near the outer end, friction between the sealing ring and the inner wall of the female connector 12 can be avoided. Furthermore, only a protruding step portion matching the outer surface of the male connector 11 needs to be formed at the corresponding position on the inner wall of the female connector 12, so that in the installed position, the sealing ring of the male connector 11 abuts against the step portion on the inner wall of the female connector 12, thereby ensuring a sealing effect.

[0053] Third Embodiment

[0054] The third embodiment of this utility model provides a more specific structure of the adapter 100. The other structures are the same as those in the first and / or second embodiments, and will not be described in detail here.

[0055] like Figure 4 As shown, the first connector 1 of the adapter 100 is a female connector 12, and the second connector 2 is also a female connector 12. The adapter 100 can be used when the external connectors of the first external pipeline component 200 and the external connectors of the second external pipeline component 300 are both male connectors 11.

[0056] Similarly, in other embodiments, such as Figure 5 As shown, the first connector 1 of the adapter 100 is a male connector 11, and the second connector 2 is also a male connector 11. The adapter 100 can be used when the external connectors of the first external pipeline component 200 and the external connectors of the second external pipeline component 300 are both female connectors 12.

[0057] In another embodiment, the case where the first connector 1 of the adapter 100 is a male connector 11 / female connector 12 and the second connector 2 is a female connector 12 / male connector 11 is also applicable to the present invention. It can be used when the external connectors of the first external pipeline component 200 and the second external pipeline component 300 are male connector 11 and female connector 12 respectively, but cannot be directly connected due to factors such as size mismatch.

[0058] Fourth embodiment

[0059] The fourth embodiment of this utility model provides a more specific structure of the adapter 100. The other structures are the same as those in the first embodiment and / or the second embodiment, and will not be described in detail here.

[0060] like Figure 6 As shown, the first connector 1 of the adapter 100 is a male connector 11 / female connector 12, and the second connector 2 of the adapter 100 is an external thread / internal thread connector. Figure 6 The example illustrates a case where the first connector 1 is a female connector 12 and the second connector 2 is an external threaded connector 31. This adapter 100 is applicable when the external connector of the first external piping component 200 is a plug connector (i.e., male connector 11 or female connector 12) and the external connector of the second external piping component is a threaded connector (i.e., external threaded connector 31 or internal threaded connector).

[0061] In some preferred embodiments, such as Figure 7 As shown, the second connector 2 can also be a union nut connector. A union nut connector does not change the orientation of the pipe components during tightening, thus better ensuring that both pipe components are installed in the correct orientation. Furthermore, as... Figure 8 As shown, the adapter 100 may further include a main body section 5 and a telescopic section 6. The first connector 1 and the second connector 2 are located on opposite sides of the main body section 5. One end of the telescopic section 6 is telescopically connected to the main body section 5, and the other end is fixedly connected to either the first connector 1 or the second connector 2. That is, the main body section 5 and the first connector 1 can be indirectly connected via the telescopic section 6, which controls the distance between the first connector 1 and the main body section 5. Alternatively, the main body section 5 and the second connector 2 can be indirectly connected via the telescopic section 6, which controls the distance between the second connector 2 and the main body section 5. Figure 8 The example illustrates a case where the telescopic section 6 is positioned between the main body section 5 and the first connector 1. The outer diameter of the telescopic section 6 is smaller than the inner diameter of the main body section 5, allowing it to extend out of or retract into the main body section 5 to change the distance between the main body section 5 and the first connector 1. For different installation distances between the first pipeline component and the second pipeline component, the telescopic connection of the adapter 100 can also be used to fill the gap, thus making it suitable for more application scenarios.

[0062] Fifth embodiment

[0063] The fifth embodiment of this utility model provides a more specific structure of the adapter 100. The other structures are the same as those in the first and / or second embodiments, and will not be described in detail here.

[0064] like Figure 9 As shown, the first connector 1 of the adapter 100 is a male connector 11 / female connector 12, and the second connector 2 of the adapter 100 is a heat fusion connector (PPR material). Figure 9 The example illustrates a case where the first connector 1 is a female connector 12 and the second connector 2 is a thermofusion connector. This adapter 100 is applicable to cases where the external connector of the first external piping component 200 is a plug connector (i.e., male connector 11 or female connector 12) and the external connector of the second external piping component is a thermofusion connector.

[0065] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An adapter, characterized in that, include: The first connector (1) is either a male connector (11) or a female connector (12); The second connector (2) is used for mating and connecting with the external connector. The male connector (11) is formed as a hollow tube, and a limiting groove (111) is provided on its outer surface; The female connector (12) is formed as a hollow tube and has an insertion hole (121) that penetrates the side wall of the female connector (12).

2. The adapter according to claim 1, characterized in that, The second connector (2) is a male connector (11) or a female connector (12).

3. The adapter according to claim 1, characterized in that, The second connector (2) is any one of the following: union nut connector, internal thread connector, external thread connector (31), or heat fusion connector.

4. The adapter according to claim 2 or 3, characterized in that, The adapter also includes: The main body segment (5) has the first connector (1) and the second connector (2) located on both sides of the main body segment (5); The telescopic section (6) is telescopically connected at one end to the main body section (5) and fixedly connected at the other end to the first connector (1) or the second connector (2).

5. The adapter according to claim 2 or 3, characterized in that, The limiting groove (111) is perpendicular to the central axis of the male connector (11).

6. The adapter according to claim 5, characterized in that, The limiting groove (111) is arranged around the entire circumference of the male connector (11).

7. The adapter according to claim 1, characterized in that, One or more sealing rings are fitted on the outer surface of the male connector (11), the sealing rings protruding from the outer surface of the male connector (11), and at least one of the sealing rings is disposed between the outer end of the male connector (11) and the limiting groove (111).

8. The adapter according to claim 7, characterized in that, The male connector (11) is a hollow cylinder, and the outer diameter of the limiting groove (111) on the side closer to the outer end of the male connector (11) is smaller than the outer diameter of the limiting groove (111) on the side farther away from the outer end.

9. The adapter according to claim 1, characterized in that: The insertion hole (121) is a through hole or a blind hole.

10. The adapter according to claim 9, characterized in that: The female connector (12) includes a main body (123) and a boss (122), and the insertion hole (121) is opened in the boss (122).

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