Variable diameter self-adapting radial seal connector

Abstract

The utility model discloses a kind of variable-diameter self-adapting radial sealing connectors, belong to sealing connector technical field. Mainly including test adapter, drive adapter, and the base with test airflow channel and drive airflow channel are set, the base is fixed with the test airflow joint of the section being T type, the periphery of this test airflow joint fixed cover is equipped with slide-bore outer lining piece;The downside end surface of test airflow joint is set with recess space, the recess space is connected with drive airflow channel and jointly constitutes drive inner chamber;Reset spring is installed between the transverse inner wall of slide-bore inner lining piece and slide-bore outer lining piece;The top of slide-bore inner lining piece is hermetically installed with sealing element lining piece, and axial sealing element is installed between the inner end surface of sealing element lining piece and the upper end surface of slide-bore inner lining piece.The utility model variable-diameter self-adapting ability is strong, and it is strong in universality, compact structure, small space occupation, with outstanding practical value and popularization prospect in the field of electronic expansion valve and other pipe product testing.

Description

Technical Field

[0001] This utility model relates to a radial sealing connector, and more specifically, to a variable diameter adaptive radial sealing connector with a compact and ingenious structural design, good sealing performance, low wear, convenient installation and maintenance, and the ability to adapt to different pipe diameters. Background Technology

[0002] In the testing of products such as electronic expansion valves, sealed connectors serve as a key auxiliary tool, primarily used to quickly and reliably establish and maintain a sealed connection during testing, thereby ensuring the accuracy of test data and the efficiency and safety of the testing process.

[0003] Chinese Patent Publication No. CN202252521U discloses a self-adjusting gap sealing joint, the technical solution of which mainly includes a base plate and a connecting plate with a channel. The base plate is provided with a first joint for connecting to one end of the sealed part and a rotating support type joint. The upper end of the rotating support type joint is connected to the connecting plate and can drive the connecting plate to move left and right when rotated. The connecting plate is also provided with a second joint for connecting to the other end of the sealed part. The second joint is connected to the rotating support type joint through the channel in the connecting plate. Both the first joint and the second joint are provided with an O-ring seal inside.

[0004] Therefore, existing sealing connectors primarily use O-rings to achieve radial sealing of the sealed component (such as an electronic expansion valve). However, this sealing method has certain limitations in practical applications: firstly, when the outer diameter tolerance of the sealed component is large, the O-ring cannot achieve a stable and reliable sealing effect, easily leading to leakage; secondly, because the O-ring is in direct contact with the surface of the component and generates friction during assembly, it not only increases assembly resistance but also accelerates the wear of the sealing ring, affecting its service life. These factors restrict the application effectiveness of traditional sealing connectors in precision testing fields. Therefore, developing a radial sealing connector with excellent sealing performance, low wear, and wide applicability has become a technical problem urgently needing to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a variable diameter adaptive radial sealing connector with a compact and ingenious structural design, good sealing performance, low wear, convenient installation and maintenance, and the ability to adapt to different pipe diameters.

[0006] This utility model is achieved through the following technical solution: A variable diameter adaptive radial sealing connector includes a base with a test airflow channel and a drive airflow channel. The air inlet of the test airflow channel is hermetically connected to a test adapter that serves as a test airflow feed port, and the air inlet of the drive airflow channel is hermetically connected to a drive adapter that serves as a drive airflow feed port. A test airflow connector with a T-shaped cross-section is fixed on the base, and a smooth liner is hermetically and fixedly connected to the test airflow connector. The cavity of the outer liner of the slicker is provided with a slicker inner liner that is sleeved on the test airflow connector and can slide up and down in the cavity of the outer liner of the slicker. The slicker inner liner has a slicker through hole that communicates with the test airflow channel. The lower end face of the test airflow connector is provided with a groove space, which is connected to the drive airflow channel and together form the drive inner cavity; A return spring is installed between the inner wall of the sluice box liner and the outer wall of the sluice box liner to reset the sluice box liner. A sealing liner is installed on the top of the sluice chamber liner in a sealed manner. The sealing liner has a workpiece hole and the inner diameter of the sealing liner is in clearance fit with the outer diameter of the top of the sluice chamber liner. An axial seal is installed between the inner end face of the sealing liner and the upper end face of the sluice liner.

[0007] Preferably, the sealing liner includes an outer sealing liner and an inner sealing sleeve; the outer sealing liner is sealed and fixedly covered on the outer wall of the sluice box liner, and the inner sealing sleeve is sealed and fixedly connected to the inner wall of the sluice box liner; the inner sealing sleeve and the sluice box liner are clearance-fitted.

[0008] Preferably, a dynamic sealing structure is provided between the outer wall of the sluice box liner and the inner wall of the cavity of the sluice box outer liner.

[0009] Preferably, the outer wall of the sprue liner is provided with a sprue annular groove, and a sprue sealing ring is interference-fitted into the sprue annular groove.

[0010] Preferably, a dynamic sealing structure is provided between the outer wall of the test airflow connector and the inner wall of the slide liner cavity.

[0011] Preferably, the outer wall of the test airflow connector is provided with a connector annular groove, and a connector sealing ring is interference-fitted into the connector annular groove.

[0012] Preferably, the test airflow connector has an annular groove at its root, and a base sealing ring is interference-fitted into the annular groove.

[0013] Preferably, the central axes of the workpiece hole, axial seal, smooth bore through hole, test airflow channel, and test adapter are collinear.

[0014] Preferably, the test airflow connector and the base are an integral structure.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This utility model uses a dynamic structure composed of a sluice box liner and a return spring to precisely control the deformation of the axial seal, automatically compensate for pipe diameter tolerances, achieve stable sealing for pipes with different outer diameters, and has strong adaptability to diameter changes and strong versatility. This invention employs a design that combines axial sealing with multi-stage dynamic sealing, ensuring sealing reliability under high pressure conditions while significantly reducing wear during insertion and removal, effectively extending the service life of the sealing element. This utility model has a compact structure and occupies little space, making it easy to integrate multiple sealing connectors in a limited space. It is convenient to install and maintain, and has outstanding practical value and promotion prospects in the field of testing pipe fittings such as electronic expansion valves. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a top view structural diagram of this utility model.

[0018] Figure 3 This is a utility model Figure 2 A cross-sectional view along line AA.

[0019] Figure 4 This is a utility model Figure 3 Enlarged view of section B in the middle.

[0020] Figure 5 This is a schematic diagram of the test airflow and the direction of the driving airflow of this utility model.

[0021] In the picture: 11. Base; 111. Test airflow channel; 112. Drive airflow channel; 113. Test airflow connector; 1131. Groove space; 114. Connector sealing ring; 115. Base sealing ring; 12. Test adapter; 13. Drive adapter; 14. Slide liner; 141. Transverse inner wall; 15. Slide liner; 151. Slide through hole; 152. Slide seal ring; 16. Return spring; 17. Sealing liner; 171. Sealing outer liner; 172. Sealing inner bushing; 173. Workpiece hole; 18. Axial seal. Detailed Implementation

[0022] To enable readers to better understand the design intent of this utility model, the technical solution described below is further described in conjunction with embodiments. It should be noted that directional terms that may appear in the following paragraphs, including but not limited to "up," "down," "left," "right," "front," and "back," are based on the visual orientation shown in the accompanying drawings and should not be considered as limitations on the scope of protection or technical solution of this utility model. Their purpose is solely to facilitate a better understanding of the technical solution described in this utility model by those skilled in the art.

[0023] In this specification, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Example 1

[0025] like Figures 1 to 5 A variable diameter adaptive radial sealing connector includes a base 11 with a test airflow channel 111 and a drive airflow channel 112. The air inlet of the test airflow channel 111 is hermetically connected to a test adapter 12, which serves as the test airflow inlet, and the air inlet of the drive airflow channel 112 is hermetically connected to a drive adapter 13, which serves as the drive airflow inlet. A test airflow connector 113 with a T-shaped cross-section is fixed on the base 11. A slicker outer liner 14 is hermetically fixedly connected to the test airflow connector 113. A slicker inner liner 15 is provided inside the cavity of the slicker outer liner 14, which is sleeved on the test airflow connector 113 and can slide up and down inside the cavity of the slicker outer liner 14. The slicker inner liner 15 has a slicker through hole 151 that communicates with the test airflow channel 111. A groove space 1131 is provided on the lower end face of the test airflow connector 113. The groove space 1131 communicates with the drive airflow channel 112 and together form a drive inner cavity. In this embodiment, a return spring 16 is installed between the inner wall 141 of the sluice gate liner 15 and the outer sluice gate liner 14 to reset the sluice gate liner 15; a sealing liner 17 is sealed on the top of the sluice gate liner 15, the sealing liner 17 has a workpiece hole 173, and the inner diameter of the sealing liner 17 is clearance-fitted with the top outer diameter of the sluice gate liner 15; an axial seal 18 is installed between the inner end face of the sealing liner 17 and the upper end face of the sluice gate liner 15. Figure 5 As shown in the figure, C represents the direction of the driving airflow, and D represents the direction of the test airflow.

[0026] Assuming the sealed component is an electronic expansion valve, the working principle and operation process of this embodiment are as follows: One of the airflow channels of the electronic expansion valve is inserted through the workpiece hole 173, passes through the axial seal 18, and extends into the slide passage hole 151. When no driving airflow is introduced into the drive adapter 13, the axial seal 18 is in an initial free state, with slight contact or gaps between it and the airflow channel of the electronic expansion valve. During testing, high-pressure driving airflow is first introduced into the drive adapter 13, and the airflow enters the groove space 1131 through the drive airflow channel 112; the high pressure formed in the groove space 1131 pushes the slide liner 15 upward, causing it to move upward and squeeze the axial seal 18; the axial seal 18 undergoes radial elastic deformation under axial compression, thereby tightly gripping the airflow channel of the electronic expansion valve and forming a reliable seal therebetween. Subsequently, test airflow can be introduced from the test adapter 12 to perform performance testing on the electronic expansion valve.

[0027] In this embodiment, the friction between the airflow pipe of the electronic expansion valve and the axial seal 18 is very small during high-frequency insertion and removal, thus significantly extending the service life of the axial seal 18.

[0028] This embodiment uses a dynamic structure composed of a sluice liner and a return spring to precisely control the deformation of the axial seal, automatically compensate for pipe diameter tolerances, and achieve stable sealing for pipe fittings with different outer diameters. It has strong adaptability to diameter changes and high versatility. This embodiment has a compact structure and occupies little space, making it easy to integrate multiple sealing connectors in a limited space. It is convenient to install and maintain, and has outstanding practical value and promotion prospects in the field of testing pipe fitting products such as electronic expansion valves.

[0029] Example 2

[0030] Based on Embodiment 1, this embodiment continues to describe in detail the technical features involved therein and the functions and roles of these technical features in this utility model, so as to help those skilled in the art to fully understand the technical solution of this utility model and reproduce it.

[0031] like Figure 3 , Figure 4 As shown, the sealing liner 17 in this embodiment includes an outer sealing liner 171 and an inner sealing bushing 172. The outer sealing liner 171 is sealed and fixedly mounted on the outer wall of the sluice chamber outer liner 14, and the inner sealing bushing 172 is sealed and fixedly connected to the inner wall of the sluice chamber outer liner 14. The inner sealing bushing 172 and the sluice chamber inner liner 15 are clearance-fitted. The head of the sluice chamber inner liner 15 slides up and down guided by the inner sealing bushing 172, and the tail of the sluice chamber inner liner 15 slides up and down guided by the test airflow connector 113. The movement accuracy is high and the sliding pair structure is stable.

[0032] To ensure the sealing reliability of the product under multiple motion interfaces, this embodiment features a multi-layered dynamic sealing structure: First, a dynamic sealing structure is provided between the outer wall of the slicker liner 15 and the inner wall of the cavity of the slicker outer liner 14. Specifically, a slicker annular groove is formed on the outer wall of the slicker liner 15, and a slicker sealing ring 152 is interference-fitted into this groove. This structure achieves a dynamic seal between the inner wall of the slicker liner 15 and the inner wall of the slicker outer liner 14. Second, a dynamic sealing structure is provided between the outer wall of the test airflow connector 113 and the inner wall of the cavity of the slicker liner 15. Specifically, a connector annular groove is formed on the outer wall of the test airflow connector 113, and a connector sealing ring 114 is interference-fitted into this groove. This structure achieves a dynamic seal between the drive adapter 13 and the inner wall of the slicker liner 15. Third, a base annular groove is provided at the root of the test airflow connector 113, and a base sealing ring 115 is interference-fitted in the base annular groove. This structure achieves a static seal between the test airflow connector 113 and the slide liner 14.

[0033] In this embodiment, the sluice gate seal ring 152, the connector seal ring 114, and the base seal ring 115 together form a good sealing barrier. The structure is simple, the assembly is reliable, and it effectively isolates the external environment from the internal air passage.

[0034] This embodiment employs a design that combines axial sealing with multi-stage dynamic sealing, ensuring sealing reliability under high pressure conditions while significantly reducing wear during insertion and removal, effectively extending the service life of the sealing element.

[0035] In this embodiment, the central axes of the workpiece hole 173, axial seal 18, smooth bore through hole 151, test airflow channel 111, and test adapter 12 are collinear. This collinear design ensures a straight flow path for the test airflow, effectively reducing flow resistance loss and ensuring a stable and rapid response to the test pressure signal, thereby improving the detection accuracy of key parameters such as flow characteristics.

[0036] In this embodiment, the airflow connector 113 and the base 11 are integrated into one piece. This not only simplifies the overall assembly process and improves structural strength, but also fundamentally eliminates the assembly gaps and leakage risks that may occur in this part of a separate connector, further enhancing the sealing stability and overall reliability of the connector.

[0037] In summary, this is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent variations and modifications made in accordance with the shape, structure, features and spirit of the claims of the present utility model should be included within the scope of the claims of the present utility model.

Claims

1. A variable diameter adaptive radial sealing connector, characterized in that: The base (11) includes a test airflow channel (111) and a drive airflow channel (112). The air inlet of the test airflow channel (111) is sealed to a test adapter (12) which serves as the test airflow inlet. The air inlet of the drive airflow channel (112) is sealed to a drive adapter (13) which serves as the drive airflow inlet. A test airflow connector (113) with a T-shaped cross-section is fixed on the base (11). The test airflow connector (113) is surrounded by a smooth liner (14) that is sealed to it. The cavity of the outer liner of the slub is provided with a slub inner liner (15) which is sleeved on the test airflow connector (113) and can slide up and down in the cavity of the outer liner of the slub (14). The slub inner liner (15) is provided with a slub through hole (151) that is connected to the test airflow channel (111). The lower end face of the test airflow connector (113) is provided with a groove space (1131), which is connected to the drive airflow channel (112) and together forms the drive inner cavity; A return spring (16) is installed between the inner liner (15) of the sluice and the transverse inner wall (141) of the outer liner (14) of the sluice, for resetting the inner liner (15). The top of the slub liner (15) is sealed with a sealing liner (17), the sealing liner (17) has a workpiece hole (173), and the inner diameter of the sealing liner (17) is clearance-fitted with the top outer diameter of the slub liner (15). An axial seal (18) is installed between the inner end face of the sealing liner (17) and the upper end face of the sluice liner (15).

2. The variable diameter adaptive radial sealing connector according to claim 1, characterized in that: The sealing liner (17) includes an outer sealing liner (171) and an inner sealing bushing (172); the outer sealing liner (171) is sealed and fixedly covered on the outer wall of the slicker liner (14), and the inner sealing bushing (172) is sealed and fixedly connected to the inner wall of the slicker liner (14); the inner sealing bushing (172) is clearance-fitted with the slicker liner (15).

3. The variable diameter adaptive radial sealing connector according to claim 1, characterized in that: A dynamic sealing structure is provided between the outer wall of the slicker liner (15) and the inner wall of the cavity of the slicker liner (14).

4. A variable diameter adaptive radial sealing connector according to claim 3, characterized in that: The outer wall of the sprue liner (15) is provided with a sprue annular groove, and a sprue sealing ring (152) is interference-fitted into the sprue annular groove.

5. A variable diameter adaptive radial sealing connector according to claim 1, characterized in that: A dynamic sealing structure is provided between the outer wall of the test airflow connector (113) and the inner wall of the cavity of the slick bore liner (15).

6. A variable diameter adaptive radial sealing connector according to claim 5, characterized in that: The outer wall of the test airflow connector (113) is provided with a connector annular groove, and a connector sealing ring (114) is interference-fitted into the connector annular groove.

7. A variable diameter adaptive radial sealing connector according to claim 1, characterized in that: The test airflow connector (113) has a base annular groove at its root, and a base sealing ring (115) is interference-fitted into the base annular groove.

8. A variable diameter adaptive radial sealing connector according to claim 1, characterized in that: The central axes of the workpiece hole (173), axial seal (18), smooth bore through hole (151), test airflow channel (111) and test adapter (12) are collinear.

9. A variable diameter adaptive radial sealing connector according to claim 1, characterized in that: The test airflow connector (113) and the base (11) are an integral structure.

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