Axial seal arrangement and quick coupling

Abstract

The utility model belongs to pipeline connecting device technical field, concretely relates to axial sealing structure and quick -witted joint, axial sealing structure includes valve core, connecting post and connecting nut: the valve core includes valve core front section, valve core middle section and valve core rear section, be provided with first sealing ring between valve core front section with valve core middle section, the valve core middle section sets up the shroud, the shroud is located first recess's top, be provided with second sealing ring between valve core rear section with valve core middle section, the connecting nut is along the connecting post sliding arrangement, the end of connecting nut is set up in the outside of valve core front section, reset spring is arranged between connecting nut with connecting post, to make connecting nut with first sealing ring abuts, in the utility model, the shroud is located first recess's top, protects first sealing ring, reduces friction and abrasion, to enhance the life of first sealing ring, to improve the durability of whole valve core.

Description

Technical Field

[0001] This utility model belongs to the technical field of pipeline connection devices, specifically relating to axial sealing structures and quick couplings. Background Technology

[0002] Valve cores are quick-connect devices used in gas delivery systems, such as oxygen connectors, and are suitable for medical oxygen supply equipment, industrial cutting equipment, and other scenarios, enabling safe sealing and quick on / off functions.

[0003] However, the sealing rings in existing valve cores lack a protective structure. During use, the first sealing ring of the valve core is directly exposed in the fluid channel. Dust and other particulate impurities carried in the fluid channel directly rub against the outer surface of the sealing ring. In addition, under high-pressure gas environment, the rubber sealing ring is prone to material cracking due to long-term scouring by high-speed airflow and particulate impurities, leading to sealing failure. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides an axial sealing structure and a quick connector to solve the problems of the valve core's first sealing ring being directly exposed in the fluid channel during use, causing direct friction between dust and other particulate impurities carried in the fluid channel and the outer surface of the sealing ring, and the rubber sealing ring being prone to material cracking due to long-term scouring by high-speed airflow and particulate impurities under high-pressure gas environment, leading to sealing failure.

[0005] One embodiment of this utility model provides an axial sealing structure and a quick connector, including a valve core, a connecting column, and a connecting nut:

[0006] The valve core includes a front section, a middle section, and a rear section; the front section of the valve core is coaxially and fixedly disposed with the connecting column.

[0007] A first groove is provided between the front section of the valve core and the middle section of the valve core, and the first groove is used to provide a first sealing ring.

[0008] A protective cover is provided in the middle section of the valve core. The protective cover is located above the first groove, and the first sealing ring is located between the inner side of the protective cover and the first groove.

[0009] A second groove is provided between the rear section of the valve core and the middle section of the valve core, and the second groove is used to provide a second sealing ring.

[0010] The connecting nut is slidably disposed along the connecting post, and the end of the connecting nut is sleeved on the outside of the front section of the valve core;

[0011] A return spring is provided between the connecting nut and the connecting post to allow the connecting nut to abut against the first sealing ring.

[0012] In one embodiment of this utility model, the end of the connecting nut has a beveled end, which forms a frustum-shaped space to accommodate the first sealing ring.

[0013] In one embodiment of this utility model, the height of the protective cover is at least one-third of the diameter of the first sealing ring cross-section;

[0014] The protective cover and the beveled end are configured to cover the first sealing ring under the elastic support of the return spring.

[0015] In one embodiment of this utility model, a guide cone surface is provided at the end of the rear section of the valve core, and the guide cone surface is used to guide the connection between the valve core and the valve body.

[0016] In one embodiment of this utility model, the outer diameter of the middle section of the valve core is larger than the outer diameter of the front section of the valve core;

[0017] The outer diameter of the first sealing ring is smaller than the inner diameter of the protective cover, but larger than the outer diameter of the front section of the valve core.

[0018] In one embodiment of this utility model, a third groove is provided on the outer side of the connecting nut, and the third groove is used to set a third sealing ring;

[0019] The end of the connecting nut is provided with a positioning notch, and the two positioning notches are arranged symmetrically.

[0020] In one embodiment of this utility model, the reset spring is configured as a conical spring.

[0021] In one embodiment of this utility model, an annular groove is provided at the end of the connecting column, the annular groove is used to provide an open retaining ring, and the tip of the return spring abuts against the open retaining ring;

[0022] The inner side of the connecting nut is provided with a stepped structure, and the flat end of the return spring abuts against the stepped structure.

[0023] In one embodiment of this utility model, a positioning retaining ring is further included. The positioning retaining ring is disposed between the reset spring and the connecting nut, and the positioning retaining ring is used to center the connecting column.

[0024] The positioning retaining ring has an outer ring and an inner ring centrally located. The outer ring is adapted to the stepped structure, and the diameter of the inner ring matches the outer diameter of the connecting post.

[0025] One embodiment of this utility model also provides a quick connector, including the axial sealing structure described in any one of the above embodiments.

[0026] The axial sealing structure and quick connector provided by this utility model can achieve the following technical effects:

[0027] 1. The protective cover covers the outside of the first sealing ring, effectively blocking particulate impurities in the fluid channel from directly rubbing against the sealing ring. At the same time, it reduces the scouring effect of high-pressure airflow on the rubber material, significantly reducing the risk of sealing ring cracking and extending the service life of the sealing ring. The beveled design at the end of the connecting nut forms a truncated cone-shaped space, which, together with the protective cover, covers the first sealing ring. Under the pressure of the return spring, they fit tightly, which not only improves the pressure uniformity of the first sealing ring, but also effectively prevents fluid leakage and ensures stable sealing under high pressure.

[0028] 2. The guide cone surface design at the rear of the valve core enables quick and precise alignment with the valve body, facilitating the connection between the valve core and the valve body and ensuring proper alignment of the first sealing ring, thus preventing leakage caused by improper installation. Furthermore, the centrally symmetrical rotating body design ensures even force distribution on the valve core during operation, reducing uneven wear and ensuring long-term sealing performance.

[0029] 3. The conical return spring, in conjunction with the open retaining ring and stepped structure, provides stable elastic support force, ensuring that the connecting nut always presses against the sealing ring and maintains the sealing state; the spring structure is compact and has strong fatigue resistance, improving the overall durability of the device. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0031] Figure 1 An exploded view of this utility model;

[0032] Figure 2 This is a schematic diagram showing the structure of the present invention;

[0033] Figure 3 A cross-sectional structural diagram of this utility model;

[0034] Figure 4 A schematic diagram showing the structure of the valve core of this utility model;

[0035] Figure 5 This is a schematic diagram showing the structure of the connecting nut of this utility model.

[0036] The symbols in the attached image are explained as follows:

[0037] 1-Valve core; 11-Front section of valve core; 12-Middle section of valve core; 13-Rear section of valve core; 14-First groove; 15-Second groove;

[0038] 2-Connecting column; 21-; Annular groove;

[0039] 3-Connecting nut; 31-Beveled end; 32-Third sealing ring; 33-Positioning notch;

[0040] 4-First sealing ring

[0041] 5-Shield;

[0042] 6-Second sealing ring;

[0043] 7-Return spring;

[0044] 8-Positioning retaining ring. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0046] Please refer to Figures 1-5 One embodiment of this utility model provides an axial sealing structure and a quick connector, including a valve core 1, a connecting post 2, and a connecting nut 3:

[0047] The valve core 1 includes a front section 11, a middle section 12, and a rear section 13; the front section 11 is coaxially fixedly disposed with the connecting post 2.

[0048] A first groove 14 is provided between the front section 11 of the valve core and the middle section 12 of the valve core, and the first groove 14 is used to provide a first sealing ring 4.

[0049] The valve core middle section 12 is provided with a protective cover 5, the protective cover 5 is located above the first groove 14, and the first sealing ring 4 is located between the inner side of the protective cover 5 and the first groove 14.

[0050] A second groove 15 is provided between the rear section 13 of the valve core and the middle section 12 of the valve core, and the second groove 15 is used to set the second sealing ring 6.

[0051] The connecting nut 3 is slidably disposed along the connecting post 2, and the end of the connecting nut 3 is sleeved on the outside of the front section 11 of the valve core;

[0052] A return spring 7 is provided between the connecting nut 3 and the connecting post 2 so that the connecting nut 3 abuts against the first sealing ring 4.

[0053] Understandably, the first sealing ring 4 and the second sealing ring 6 are used to form a sealing fit with the pipe or other connecting parts. In this embodiment, the protective cover 5 covers the outside of the first sealing ring 4, effectively blocking particulate impurities in the fluid channel from directly rubbing against the sealing ring, while reducing the scouring effect of high-pressure airflow on the rubber material, significantly reducing the risk of sealing ring cracking, and extending the service life of the sealing ring. The end of the connecting nut 3 and the protective cover 5 work together to cover the first sealing ring 4, and they fit tightly under the pressure of the return spring 7, which not only improves the pressure uniformity of the first sealing ring 4, but also effectively prevents fluid leakage and ensures stable sealing under high pressure.

[0054] Please refer to Figure 5 In one embodiment of the present invention, the end of the connecting nut 3 has a beveled end 31, which forms a frustum-shaped space for accommodating the first sealing ring 4.

[0055] Understandably, the beveled design at the end of the connecting nut 3 forms a truncated cone-shaped space, which, together with the protective cover 5, covers the first sealing ring 4. Under the pressure of the return spring 7, they fit tightly together, which not only improves the pressure uniformity of the first sealing ring 4, but also effectively prevents fluid leakage and ensures stable sealing under high pressure.

[0056] In one embodiment of this utility model, the height of the protective cover 5 is at least one-third of the cross-sectional diameter of the first sealing ring 4;

[0057] The protective cover 5 and the inclined end 31 are configured to cover the first sealing ring 4 under the elastic support of the return spring 7.

[0058] Understandably, the height of the shield 5 is not less than one-third of the diameter of the sealing ring section, ensuring that at least 50% of the vertical part of the sealing ring is wrapped by the shield 5 to form a physical barrier. Combined with the truncated cone structure of the inclined end 31, under the pressure of the return spring 7, the two together form a protective zone, reducing the direct contact of external particulate impurities with the sealing ring surface, while blocking the directional scouring of high-pressure airflow.

[0059] Furthermore, the elastic support of the return spring 7 ensures that the cover 5 and the inclined end 31 always apply a uniform covering force to the sealing ring. When the fluid pressure fluctuates or the mechanical vibration occurs, the protective structure can still fit tightly against the sealing ring, preventing the protective gap from opening and closing with pressure changes.

[0060] Please refer to Figure 3In one embodiment of the present invention, a guide cone surface is provided at the end of the rear section 13 of the valve core, and the guide cone surface is used to guide the valve core 1 to connect with the valve body;

[0061] The outer diameter of the middle section 12 of the valve core is larger than the outer diameter of the front section 11 of the valve core.

[0062] The outer diameter of the first sealing ring 4 is smaller than the inner diameter of the protective cover 5, but larger than the outer diameter of the valve core front section 11.

[0063] Understandably, the outer diameter of the middle section 12 of the valve core is greater than that of the front section, forming a stepped structure. When it fits with the inner wall of the valve body, it restricts the excessive insertion of the valve core 1, ensuring that the first sealing ring 4 is accurately positioned in the valve body sealing surface area. Also, the outer diameter of the first sealing ring 4 is less than the inner diameter of the protective cover 5, avoiding excessive deformation caused by the inner wall of the protective cover 5 squeezing the sealing ring. At the same time, the outer diameter of the sealing ring is greater than the outer diameter of the front section 11 of the valve core, so that the sealing ring expands outward under pressure and forms an interference fit with the inner wall of the valve body, achieving a leak-free seal.

[0064] Please refer to Figures 3-5 In one embodiment of the present invention, a third groove is provided on the outer side of the connecting nut 3, and the third groove is used to provide a third sealing ring 32;

[0065] The end of the connecting nut 3 is provided with a positioning notch 33, and the two positioning notches 33 are symmetrically arranged for installing the axial sealing structure into the valve body.

[0066] Understandably, the third sealing ring 32 can be securely installed in the third groove, while forming an effective sealing interface with the connecting nut 3 and adjacent components (such as the valve body) to enhance the sealing performance of the quick connector, prevent fluid leakage at the connection, and improve the reliability and durability of the overall structure.

[0067] In one embodiment of this utility model, the reset spring 7 is configured as a conical spring.

[0068] The end of the connecting column 2 is provided with an annular groove 21, which is used to provide an open retaining ring. The tip of the return spring 7 abuts against the open retaining ring.

[0069] The inner side of the connecting nut 3 is provided with a stepped structure, and the flat end of the return spring 7 abuts against the stepped structure.

[0070] Understandably, the installation design of the return spring 7 in this embodiment ensures that it remains stable during installation and use, preventing it from easily falling off or shifting. The characteristics of the conical spring enable it to provide stable elastic force, ensuring smooth movement of the quick connector during connection and disconnection, while also ensuring a tight fit of the sealing ring to prevent fluid leakage. The annular groove 21 and the open retaining ring further enhance the stability of the return spring 7, allowing it to be firmly fixed to the connecting post 2. The stepped structure inside the connecting nut 3 provides a reliable support point for the flat end of the return spring 7, enabling it to maintain its correct position under pressure, thereby ensuring the sealing performance of the quick connector.

[0071] Please refer to Figure 5 In one embodiment of the present invention, a positioning retaining ring 8 is further included. The positioning retaining ring 8 is disposed between the reset spring 7 and the connecting nut 3. The positioning retaining ring 8 is used to center the connecting post 2.

[0072] The positioning retaining ring has an outer ring and a centrally located inner ring. The outer ring is adapted to the stepped structure, and the diameter of the inner ring matches the outer diameter of the connecting post 2.

[0073] Understandably, "centering" refers to determining the center position of a component or object so that it is on a desired central axis. In this embodiment, the return spring 7 keeps the outer ring tightly fitted to the stepped structure, and the connecting post 2 is inserted into the inner ring. The positioning retaining ring 8 is used to ensure that the central axis of the connecting post 2 coincides with the central axis of the connecting nut 3, thereby achieving centering, preventing axial displacement of the connecting post 2 when it moves back and forth, and enabling the valve core 1 and the connecting post 2 to be quickly and accurately positioned and assembled onto the connecting nut 3, ensuring the consistency of product quality.

[0074] In one embodiment of this utility model, a quick connector is also provided, including the axial sealing structure described in any one of the above embodiments.

[0075] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An axial seal structure, characterized by, Includes valve core (1), connecting post (2), and connecting nut (3): The valve core (1) includes a front section (11), a middle section (12), and a rear section (13); the front section (11) is coaxially fixed with the connecting post (2); A first groove (14) is provided between the front section (11) of the valve core and the middle section (12) of the valve core, and the first groove (14) is used to set the first sealing ring (4); The valve core middle section (12) is provided with a protective cover (5), the protective cover (5) is located above the first groove (14), and the first sealing ring (4) is located between the inner side of the protective cover (5) and the first groove (14); A second groove (15) is provided between the rear section (13) of the valve core and the middle section (12) of the valve core, and the second groove (15) is used to provide a second sealing ring (6); The connecting nut (3) is slidably disposed along the connecting post (2), and the end of the connecting nut (3) is sleeved on the outside of the front section (11) of the valve core; A return spring (7) is provided between the connecting nut (3) and the connecting post (2) so that the connecting nut (3) abuts against the first sealing ring (4).

2. The axial seal structure of claim 1, wherein, The end of the connecting nut (3) has a beveled end (31), which forms a frustum-shaped space to accommodate the first sealing ring (4).

3. The axial seal structure of claim 2, wherein, The height of the protective cover (5) is at least one-third of the diameter of the cross-section of the first sealing ring (4); The shield (5) and the inclined end (31) are configured to cover the first sealing ring (4) under the elastic support of the return spring (7).

4. The axial seal structure of claim 1 wherein, The rear section (13) of the valve core is provided with a guide cone surface at its end, which is used to guide the valve core (1) to connect with the valve body.

5. The axial seal structure of claim 4, wherein, The outer diameter of the middle section (12) of the valve core is larger than the outer diameter of the front section (11) of the valve core; The outer diameter of the first sealing ring (4) is smaller than the inner diameter of the protective cover (5) and larger than the outer diameter of the valve core front section (11).

6. The axial seal structure of claim 1 wherein, The outer side of the connecting nut (3) is provided with a third groove, which is used to set the third sealing ring (32); The end of the connecting nut (3) is provided with a positioning notch (33), and the two positioning notches (33) are symmetrically arranged.

7. An axial seal structure as claimed in any one of claims 1 to 6, wherein, The reset spring (7) is configured as a conical spring.

8. The axial seal structure of claim 7, wherein, The end of the connecting column (2) is provided with an annular groove (21), which is used to provide an open retaining ring (22). The tip of the return spring (7) abuts against the open retaining ring (22). The inner side of the connecting nut (3) is provided with a stepped structure, and the flat end of the return spring (7) abuts against the stepped structure.

9. The axial seal structure of claim 8, wherein, It also includes a positioning retaining ring (8), which is disposed between the return spring (7) and the connecting nut (3), and the positioning retaining ring (8) is used to center the connecting post (2); The positioning retaining ring has an outer ring and an inner ring located in the center. The outer ring matches the stepped structure, and the diameter of the inner ring matches the outer diameter of the connecting column (2).

10. A quick connector characterized by, An axial seal structure as claimed in any one of claims 1 to 9. An axial seal structure as claimed in any one of claims 1 to 9.

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