Plug-in sealing structure

Abstract

The utility model discloses a plug-in sealing structure which comprises a male needle assembly, a female needle assembly and a sealing assembly, a plug hole is formed in the female needle assembly, the male needle assembly is used for being inserted into the plug hole, a containing groove is formed in the inner wall of the female needle assembly, and the containing groove is arranged around the circumferential direction of the female needle assembly; the sealing assembly is arranged in the inserting hole, the sealing assembly comprises a sealing ring and an elastic assembly, the sealing ring is arranged in the containing groove, the elastic assembly has elasticity and can stretch out and draw back in the axial direction of the inserting hole, and the elastic assembly is used for blocking or separating from the sealing ring. The sealing ring is arranged in the female needle assembly, when the male needle assembly and the female needle assembly are inserted and pulled out, the risk that the sealing ring is blown out under the impact of high-pressure gas can be avoided, and the sealing effect of the female needle assembly is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of connectors, in particular to a plug-in sealing structure. Background Art

[0002] The conventional male and female pin seal structure: The female pin has a locking feature, and the ORING seal is mounted on the outer tip of the male pin. High-pressure gas flows into the female pin. When the male and female pins are inserted, the internal piping connects to the high-pressure gas. At the moment the male and female pins separate, the high-pressure gas in the piping acts on the gap between the two pins, generating a powerful, instantaneous outward thrust. Consequently, there is a risk that the ORING seal, located on the outer edge of the male pin, will be blown out by this sudden high-pressure thrust. Utility Model Content

[0003] Based on this, it is necessary to provide a plug-in sealing structure that can solve the risk of failure of the sealing ring being blown out when the male pin and the female pin are separated at high pressure.

[0004] A plug-in sealing structure, comprising:

[0005] Male pin assembly;

[0006] A female needle assembly, wherein the interior of the female needle assembly is provided with an insertion hole, into which the male needle assembly is partially inserted during insertion, and an inner wall of the female needle assembly is provided with an accommodating groove, which is arranged circumferentially around the female needle assembly;

[0007] A sealing assembly is arranged inside the plug-in hole, and the sealing assembly includes a sealing ring and an elastic assembly. The sealing ring is arranged in the accommodating groove, and the elastic assembly is elastic and can be expanded and contracted along the axial direction of the plug-in hole; the elastic assembly includes a sealing part and an elastic part, and the sealing part is arranged on the elastic part. The end of the elastic part away from the sealing part abuts against the end of the female needle assembly away from the male needle assembly, and the sealing part abuts against the sealing ring to seal the end of the female needle assembly close to the male needle assembly.

[0008] Optionally, the outer diameter of the sealing member gradually increases from the end away from the elastic member to the end close to the elastic member, and the outer diameter of the end of the sealing member away from the elastic member is smaller than the inner diameter of the sealing ring.

[0009] Optionally, the female pin assembly includes a female end assembly and a connector, the plug-in hole includes a first through hole and a second through hole that are connected to each other, the connector is provided with the first through hole, the female end assembly is provided with the second through hole, the connector is arranged on the female end assembly, and the connector part extends into the second through hole, the connector and the second through hole enclose the accommodating groove, and the elastic assembly is arranged in the second through hole.

[0010] Optionally, the second through hole includes a first hole segment and a second hole segment from top to bottom, the diameter of the first hole segment is larger than the diameter of the second hole segment, the connecting head partially extends into the first hole segment, the connecting head and the first hole segment enclose to form the accommodating groove, and the elastic component is arranged in the second hole segment.

[0011] Optionally, the female end assembly includes a female end pin and a first quick connector, the female end pin is provided with a second through hole along the axial direction, the first quick connector is partially arranged in the second through hole, a third through hole is opened inside the first quick connector, and the third through hole is connected to the second through hole.

[0012] Optionally, the female pin assembly further includes a gasket, which is arranged between the female end pin and the first quick connector.

[0013] Optionally, the male needle assembly includes a male end pin and a second quick connector, a circulation pipeline is opened inside the male end pin, the second quick connector is partially arranged in the circulation pipeline, and the second quick connector and the circulation pipeline are connected.

[0014] Optionally, the male end pin includes a male needle seat and a male needle head, the circulation pipeline passes through the male needle seat and the male needle head, the second quick connector is arranged at an end of the male needle seat away from the male needle head, and the male needle head is used to be inserted into the socket hole.

[0015] Optionally, the male needle is further provided with an air inlet, which is communicated with the circulation pipeline.

[0016] Optionally, there are multiple air inlets, and the multiple air inlets are arranged around the circumference of the male needle.

[0017] The present application achieves this by embedding the sealing ring inside the female needle assembly. When the male needle assembly and the female needle assembly are plugged in and out under high-pressure gas, the elastic assembly gradually blocks the sealing ring while the male needle assembly is pulled out, thereby avoiding the risk of the sealing ring being blown out under the impact of high-pressure gas and ensuring the sealing effect of the female needle assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. 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 structures shown in these drawings without paying any creative work.

[0019] Figure 1 This is an exploded schematic diagram of the female pin assembly and the sealing assembly of the plug-in sealing structure in Example 1;

[0020] Figure 2 Schematic diagram of the exploded male needle assembly in Example 1;

[0021] Figure 3 It is a cross-sectional view of the female needle assembly and the male needle assembly in the first embodiment when they are in a separated state;

[0022] Figure 4 It is a cross-sectional view of the female needle assembly and the male needle assembly in the first embodiment when they are in the plugged-in state;

[0023] Figure 5 A cross-sectional view of a female pin assembly of a plug-in seal structure in one embodiment

[0024] Figure 6 for Figure 5 Force diagram at point A;

[0025] Figure 7 This is an exploded schematic diagram of the female pin assembly and the sealing assembly in Example 4;

[0026] Figure 8 It is a cross-sectional view of the female needle assembly and the male needle assembly in the fourth embodiment when they are in a separated state;

[0027] Figure 9 It is a cross-sectional view of the female needle assembly and the male needle assembly in the fourth embodiment when they are in the plugged-in state;

[0028] Figure 10 This is an exploded schematic diagram of the female pin assembly and the sealing assembly in Example 2;

[0029] Figure 11 This is a schematic diagram of the process of performing necking treatment on the connector in Example 2;

[0030] Figure 12 This is an exploded schematic diagram of the female pin assembly and the sealing assembly in Example 3;

[0031] Figure 13 2 is a cross-sectional view of the combined female needle assembly and the sealing assembly in Example 3;

[0032] Figure 14This is a schematic diagram of the exploded view of the male needle assembly in Example 3.

[0033] 1. Male needle assembly; 11. Male end pin; 12. Second quick connector; 13. Flow line; 14. Male needle holder; 15. Male needle head; 16. Air inlet;

[0034] 2.2, female pin assembly; 21, plug hole; 22, receiving groove; 23, connector; 231, embedded connector; 232, C-ring; 24, female pin; 25, first quick connector; 26, first through hole; 27, second through hole; 271, first hole section; 272, second hole section; 28, third through hole; 29, gasket;

[0035] 3.3. Sealing assembly; 31. Sealing ring; 32. Elastic assembly; 321. Sealing part; 322. Elastic part.

[0036] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following section will provide a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0038] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, the descriptions of "first", "second", etc. in this utility model are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0040] refer to Figures 1-6 The present application provides a plug-in sealing structure, which includes a male needle assembly 1, a female needle assembly 2 and a sealing assembly 3. The female needle assembly 2 has a plug-in hole 21. When plugging in, the male needle assembly 1 is partially inserted into the plug-in hole 21. The inner wall of the female needle assembly 2 has a receiving groove 22. The receiving groove 22 is circumferentially arranged around the female needle assembly 2; the sealing assembly 3 is arranged inside the plug-in hole 21. The sealing assembly 3 includes a sealing ring 31 and an elastic assembly 32. The sealing ring 31 is arranged in the receiving groove 22. The elastic assembly 32 is elastic and can be stretched and retracted along the axial direction of the plug-in hole 21. The elastic assembly 32 is used to block or disengage from the sealing ring 31, thereby achieving sealing of the air outlet end of the female needle assembly 2.

[0041] The present application provides a plug-in sealing structure, in which the sealing ring 31 is built into the accommodating groove 22 of the female needle assembly 2, and the elastic component 32 is elastic and can be extended and retracted along the axial direction of the plug-in hole 21. When the male needle assembly 1 and the female needle assembly 2 are relatively inserted, the male needle assembly 1 pushes the elastic component 32 to move in the direction away from the sealing ring 31, thereby realizing the separation of the elastic component 32 and the sealing ring 31, and the high-pressure gas enters the male needle assembly 1 through the plug-in hole 21. When the male needle assembly 1 and the female needle assembly 2 are separated by plugging and unplugging, the elastic component 32 moves toward the direction close to the sealing ring 31 under the action of the elastic force and the impact of the high-pressure gas until the elastic component 32 blocks the sealing ring 31 and realizes the sealing of the female needle assembly 2 by the sealing component 3 under the high-pressure gas. In the present application, the sealing ring 31 is built into the interior of the female needle assembly 2. When the male needle assembly 1 and the female needle assembly 2 are plugged in and out under high-pressure gas, the elastic assembly 32 gradually blocks the sealing ring 31 while the male needle assembly 1 is pulled out, thereby avoiding the risk of the sealing ring 31 being blown out under the impact of high-pressure gas and ensuring the sealing effect of the female needle assembly 2.

[0042] Specifically, the air outlet is located at the top of the plug hole 21, and the sealing component 3 is arranged close to the air outlet to achieve sealing of the air outlet.

[0043] refer to Figures 1-6The female needle assembly 2 includes a female end assembly and a connector 23. The female end assembly includes a female end pin 24 and a first quick connector 25. The plug hole 21 includes a first through hole 26 and a second through hole 27 that are connected to each other. The connector 23 is provided with a first through hole 26. The female end pin 24 is provided with a second through hole 27 along the axial direction. The second through hole 27 includes a first hole section 271 and a second hole section 272 from top to bottom, and the diameter of the first hole section 271 is larger than the diameter of the second hole section 272. The connector 2 3 is arranged at the top end of the female end pin 24 and partially extends into the first hole section 271. The bottom wall of the connector 23, the side walls of the first hole section 271 and the bottom wall of the first hole section 271 together form the accommodating groove 22. The elastic component 32 is arranged in the second hole section 272. The first quick connector 25 is arranged at the bottom end of the female end pin 24 and partially extends into the second hole section 272. A third through hole 28 is defined in the interior of the first quick connector 25 and is in communication with the second hole section 272.

[0044] Specifically, the diameter of the accommodating groove 22 is smaller than the sum of the outer diameters of the sealing ring 31 and the outer diameters of the sealing member 321, so that the sealing member 321 cooperates with the sealing ring 31 to seal the female needle assembly 2. The minimum diameter of the second hole section 272 is larger than the maximum outer diameter of the sealing member 321. This ensures that when the sealing member 321 is pushed open by the male needle assembly 1, a flow channel for high-pressure gas is formed, and the sealing member 321 does not hinder the flow of high-pressure gas.

[0045] The outer diameter of the sealing ring 31 and the side wall of the accommodating groove 22 are in interference fit, and the outer side of the sealing ring 31 and the bottom of the accommodating groove 22 are in interference fit, which further improves the sealing effect.

[0046] The female pin assembly 2 further includes a gasket 29 , which is disposed between the female pin 24 and the first quick connector 25 . The gasket 29 is provided to support the elastic assembly 32 .

[0047] Specifically, the assembly process of the female pin assembly 2 is as follows: the sealing ring 31 and the connector 23 are sequentially installed into the female end pin 24. At this time, the interior of the connector 23 and the female end pin 24 forms a receiving groove 22, and then the sealing member 321, the elastic member 322, and the gasket 29 are sequentially installed into the female end pin 24. Finally, the first quick connector 25 is screwed in to complete the assembly of the female pin assembly 2.

[0048] refer to Figures 1-4The elastic component 32 includes a sealing member 321 and an elastic member 322. The sealing member 321 is arranged on the elastic member 322. The end of the elastic member 322 away from the sealing member 321 abuts against the top of the first quick connector 25 extending into the female end pin 24. When the male pin assembly 1 is pulled out relative to the female pin assembly 2 and the female pin assembly 2 is in the initial state, the end of the sealing member 321 away from the elastic member 322 abuts against the sealing ring 31, and the sealing member 321 partially extends into the inner ring of the sealing ring 31 and abuts against the inner ring side wall of the sealing ring 31, thereby blocking the sealing ring 31 to seal the air outlet end of the female pin assembly 2.

[0049] Specifically, the outer diameter of the sealing member 321 gradually increases from the end away from the elastic member 322 to the end close to the elastic member 322 , and the outer diameter of the end of the sealing member 321 close to the male needle assembly 1 is smaller than the inner diameter of the sealing ring 31 .

[0050] Furthermore, the cross-sectional dimension of the sealing member 321 is circular, and the sealing member 321 may be spherical or conical.

[0051] refer to Figure 2 The male needle assembly 1 includes a male end pin 11 and a second quick connector 12. A circulation pipeline 13 is opened inside the male end pin 11. The second quick connector 12 is partially arranged in the circulation pipeline 13. The second quick connector 12 and the circulation pipeline 13 are connected.

[0052] Specifically, the male end pin 11 includes a male needle seat 14 and a male needle head 15. The diameter of the male needle head 15 is smaller than the diameter of the male needle seat 14. The circulation pipeline 13 passes through the male needle seat 14 and the male needle head 15. The second quick connector 12 is arranged at the end of the male needle seat 14 away from the male needle head 15. The male needle head 15 matches the third through hole 28. The male needle head 15 is used to be inserted into the plug hole 21.

[0053] An air inlet 16 is further formed on the side wall of the male needle 15 , and the air inlet 16 is communicated with the flow pipe 13 .

[0054] Specifically, the assembly process of the male pin assembly 1 is as follows: screw the male end pin 11 into the second quick-connect connector 12 to complete the assembly of the male pin assembly 1.

[0055] When the male needle assembly 1 and the female needle assembly 2 are plugged in, the male needle head 15 is inserted into the plug-in hole 21 and pushes open the seal 321, so that the seal 321 moves away from the male needle head 15. At the same time, the compression elastic member 322 moves downward. When the male end pin 11 and the female end pin 24 are plugged in to the stop surface, the end of the first quick connector 25 away from the female end pin 24 is used to connect the high-pressure gas. The high-pressure gas enters the second hole section 272 through the first quick connector 25, and then enters the circulation pipeline 13 of the male needle assembly 1 through the air inlet 16 along the four sides of the seal 321.

[0056] When the male needle assembly 1 is pulled out, the seal 321 inside the female end pin 24 moves outward synchronously with the male needle assembly 1 under the action of the internal gas pushing outward and the elastic force of the compressed elastic member 322 being released. When the male needle assembly 1 and the female needle assembly 2 are separated, the air outlet end of the female needle assembly 2 is in a sealed state. The seal 321, under the action of the high-pressure gas and the elastic member 322, fits tightly against the sealing ring 31, causing the sealing ring 31 to deform and seal. At the same time, the sealing ring 31 is subjected to the oblique upward force F generated by the seal 321, and the sealing ring 31 is pressed into the accommodating groove 22. Therefore, the greater the air pressure inside the female needle assembly 2, the more reliable the seal, and the less likely the sealing ring 31 is to be blown out. Therefore, the product of the present application has a good sealing effect, is safe and reliable, and is durable and long-lasting, and has a simple structure and a short assembly time. Under high-pressure gas, it can be repeatedly plugged and unplugged, and the effort required for plugging and unplugging is small, making it easy to operate.

[0057] Furthermore, when the male needle assembly 1 and the female needle assembly 2 are in the plugged-in state, the outer diameter of the male needle head 15 and the inner diameter of the sealing ring 31 are interference fit, further ensuring the sealing effect.

[0058] refer to Figures 1-6 In embodiment 1, the sealing member 321 is a steel ball and the elastic member 322 is a double-cone spring. By adopting the steel ball seal, the high-pressure gas flow between the male needle assembly 1 and the female needle assembly 2 can be made smoother. The connector 23 and the female end are plug-in threaded connection, and a groove is formed at the bottom end of the male needle head 15 to form an air inlet 16.

[0059] refer to Figure 10-11 In the second embodiment, different from the first embodiment, the connector 23 is completely built into the first through hole 26, and then the mouth of the first through hole 26 is subjected to shrinkage deformation treatment to achieve a fixed connection between the connector 23 and the female end pin 24.

[0060] refer to Figure 12-13 In the third embodiment, different from the first embodiment, the connector 23 includes an embedded connector 231 and a C-ring 232 . The C-ring 232 is sleeved on the outer periphery of the embedded connector 231 . The embedded connector 231 is connected to the female end pin 24 through the C-ring 232 .

[0061] refer to Figure 7-Figure 9 In the fourth embodiment, different from the first embodiment, the sealing member 321 is a conical plug. By adopting the conical plug for sealing, the male needle assembly 1 and the female needle assembly 2 can be guided more stably when being inserted into each other.

[0062] refer to Figure 14 In the fifth embodiment, different from the first embodiment, an air inlet 16 is formed by punching a hole in the side wall of the bottom end of the male needle head 15. When the male needle assembly 1 accidentally falls on the floor, the mouth of the male needle assembly 1 is not easily deformed.

[0063] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A plug-in sealing structure, comprising a male needle assembly and a female needle assembly, wherein the female needle assembly is provided with an inserting hole, wherein the male needle assembly is partially inserted into the inserting hole during plug-in, and an accommodating groove is provided on the inner wall of the female needle assembly, wherein the accommodating groove is arranged around the circumference of the female needle assembly, characterized in that: Also includes: A sealing assembly is arranged inside the plug-in hole, and the sealing assembly includes a sealing ring and an elastic assembly. The sealing ring is arranged in the accommodating groove, and the elastic assembly is elastic and can be expanded and contracted along the axial direction of the plug-in hole; the elastic assembly includes a sealing part and an elastic part, and the sealing part is arranged on the elastic part. The end of the elastic part away from the sealing part abuts against the end of the female needle assembly away from the male needle assembly, and the sealing part abuts against the sealing ring to seal the end of the female needle assembly close to the male needle assembly.

2. The plug-in sealing structure according to claim 1, characterized in that: The outer diameter of the sealing member gradually increases from the end away from the elastic member to the end close to the elastic member, and the outer diameter of the end of the sealing member away from the elastic member is smaller than the inner diameter of the sealing ring.

3. The plug-in sealing structure according to claim 1, characterized in that: The female pin assembly includes a female end assembly and a connector, the plug-in hole includes a first through hole and a second through hole that are connected to each other, the connector is provided with the first through hole, and the female end assembly is provided with the second through hole, the connector is arranged on the female end assembly, and the connector part extends into the second through hole, the connector and the second through hole enclose the accommodating groove, and the elastic assembly is arranged in the second through hole.

4. The plug-in sealing structure according to claim 3, characterized in that: The second through hole includes a first hole segment and a second hole segment from top to bottom, the diameter of the first hole segment is larger than the diameter of the second hole segment, the connecting head partially extends into the first hole segment, the connecting head and the first hole segment enclose the accommodating groove, and the elastic component is arranged in the second hole segment.

5. The plug-in sealing structure according to claim 3, characterized in that: The female end assembly includes a female end pin and a first quick connector. The female end pin is provided with a second through hole along the axial direction. The first quick connector is partially provided in the second through hole. A third through hole is provided inside the first quick connector, and the third through hole is connected to the second through hole.

6. The plug-in sealing structure according to claim 5, characterized in that: The female pin assembly further includes a gasket, which is arranged between the female end pin and the first quick connector.

7. The plug-in sealing structure according to claim 1, characterized in that: The male needle assembly includes a male end pin and a second quick connector. A circulation pipeline is opened inside the male end pin. The second quick connector is partially arranged in the circulation pipeline. The second quick connector and the circulation pipeline are connected.

8. The plug-in sealing structure according to claim 7, characterized in that: The male end pin includes a male needle seat and a male needle head, the circulation pipeline is set through the male needle seat and the male needle head, the second quick connector is set at one end of the male needle seat away from the male needle head, and the male needle head is used to be inserted into the socket hole.

9. The plug-in sealing structure according to claim 8, characterized in that: The male needle is further provided with an air inlet, which is communicated with the flow pipeline.

10. The plug-in sealing structure according to claim 9, characterized in that: There are multiple air inlets, and the multiple air inlets are arranged around the circumference of the male needle.

Images