Valve core mounting structure preventing seal ring from being omitted and quick coupling

Abstract

The utility model belongs to pipeline connecting device technical field, concretely relates to prevent the valve core mounting structure and quick -operation joint of seal washer leak loading, valve core mounting structure includes: valve body, first threaded connecting piece, second threaded connecting piece, valve core subassembly, the outside assembly of second threaded connecting piece has first seal washer, valve core subassembly includes first valve core, second valve core and return spring, first valve core sets up in first threaded connecting piece, the front end of first valve core is provided with third seal washer, second valve core sets up in second threaded connecting piece, return spring is through the connecting column and is set between first valve core and second valve core, in this embodiment, if not assembly first seal washer, second valve core will abut against first valve core, make it forwardly closed vent, form mechanical type leakproof, avoid the medium outflow caused by seal washer leak loading.

Description

Technical Field

[0001] This utility model belongs to the technical field of pipeline connection devices, specifically relating to a valve core installation structure and quick connector to prevent the sealing ring from being missing. Background Technology

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

[0003] However, existing valve core assemblies are prone to missing critical sealing rings due to operational negligence during assembly, and lack a self-checking and compensation mechanism. When a seal fails, it cannot automatically stop media leakage through structural linkage. Furthermore, the sealing elements are constantly exposed in the valve core's movement path, making them susceptible to damage from mechanical friction or pressure shocks, severely impacting sealing performance and service life. In addition, while external detection devices or complex protective structures can partially alleviate these problems, they increase manufacturing costs and result in bulky structures, making them unsuitable for applications requiring miniaturized quick-connect couplings and high reliability. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a valve core installation structure and quick connector to prevent the sealing ring from being missing. This solves the problem that the valve core assembly of the prior art is prone to missing the critical sealing ring due to operational negligence during the assembly process, and lacks a self-checking compensation mechanism. When the seal fails, it cannot automatically block the leakage of the medium through structural linkage.

[0005] One aspect of this utility model provides a valve core mounting structure to prevent the sealing ring from being missing, comprising: a valve body, a first threaded connector, a second threaded connector, and a valve core assembly;

[0006] The first threaded connector is disposed in the first receiving section of the valve body;

[0007] The second threaded connector is disposed in the second receiving section of the valve body, and a baffle is disposed on the outer side of the second threaded connector; a first sealing ring is assembled between the second receiving section and the baffle.

[0008] The valve core assembly includes a first valve core, a second valve core, and a return spring. The first valve core is disposed within the first threaded connector, and a third sealing ring is provided at the front end of the first valve core. The second valve core is disposed within the second threaded connector. The return spring is sleeved between the first valve core and the second valve core via a connecting post.

[0009] The second threaded connector is configured to abut against the first valve core and move the first valve core forward when the first sealing ring is not installed, so that the third sealing ring closes the vent of the valve body.

[0010] In one embodiment of this utility model, the first valve core includes a first valve core front section, a first valve core middle section, and a first valve core rear section; a first groove is provided between the first valve core front section and the first valve core middle section, and the first groove is used to provide a second sealing ring;

[0011] A protective cover is provided in the middle section of the valve core. The protective cover is located above the first groove, and the second sealing ring is located between the inner side of the protective cover and the first groove.

[0012] 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 set the third sealing ring.

[0013] The connecting post is connected to the front section of the first valve core.

[0014] In one embodiment of this utility model, the structure of the first valve core is a centrally symmetrical rotating body;

[0015] The outer diameter of the middle section of the first valve core is larger than the outer diameter of the front section of the first valve core.

[0016] The outer diameter of the rear section of the first valve core is less than or equal to the outer diameter of the front section of the first valve core.

[0017] In one embodiment of this utility model, the outer diameter of the second sealing ring is smaller than the inner diameter of the protective cover, and larger than the outer diameter of the front section of the first valve core;

[0018] The height of the protective cover is at least half the diameter of the second sealing ring.

[0019] In one embodiment of this utility model, the second valve core includes a spring fixing platform, a second valve core body, and a guide post. One end of the second spring is sleeved on the spring fixing platform, and the guide post extends into the guide section of the second threaded connector. The second valve core body is provided with a second groove, and a fourth sealing ring is provided in the second groove. The outer diameter of the fourth sealing ring is larger than the inner diameter of the guide section of the second threaded connector.

[0020] In one embodiment of this utility model, the reset spring includes a first spring and a second spring;

[0021] The first spring is disposed between the first valve core and the first threaded connector;

[0022] The second spring is disposed between the second valve core and the first threaded connector.

[0023] In one embodiment of this utility model, both the first spring and the second spring are compression springs, and their preload direction is opposite to the direction of medium flow; the elastic coefficient of the second spring is greater than that of the first spring.

[0024] In one embodiment of this utility model, a positioning retaining ring is further included. The positioning retaining ring is disposed between the first spring and the first threaded connector, and the positioning retaining ring is used to center the first valve core.

[0025] The positioning retaining ring has an outer ring and a centrally located inner ring. The outer ring matches the first threaded connector, and the diameter of the inner ring matches the outer diameter of the connecting post.

[0026] In one embodiment of this utility model, when a first sealing ring is assembled between the second accommodating section and the baffle, the first valve core and the second valve core are configured to close the second accommodating section.

[0027] Alternatively, when the first sealing ring is not assembled between the second receiving section and the baffle, the first valve core and the second valve core are configured to simultaneously close the first receiving section and the second receiving section.

[0028] One embodiment of this utility model also discloses a quick connector, including a valve core mounting structure for preventing the sealing ring from being missed, as described in any of the above embodiments.

[0029] The valve core mounting structure for preventing sealing ring leakage provided by this utility model can achieve the following technical effects:

[0030] 1. A first sealing ring is installed between the baffle on the outside of the second threaded connector and the second receiving section. When the first sealing ring is not installed, the second valve core will abut against the first valve core, causing it to move forward and close the vent, forming a mechanical anti-leakage barrier to prevent media leakage due to the missing sealing ring.

[0031] 2. The first valve core is a segmented structure with grooves and a protective cover, used to install the second and third sealing rings. The protective cover protects the second sealing ring, effectively preventing particulate impurities in the fluid channel from directly rubbing against the second sealing ring. At the same time, it reduces the scouring effect of high-pressure gas and particulate impurities on the rubber material, significantly reducing the risk of cracking of the second sealing ring and extending the service life of the sealing ring.

[0032] 3. The mechanical structure enables the switching of the sealing ring assembly state. During normal assembly, the main seal is achieved through the first sealing ring. If the first sealing ring is missing, the double accommodating section is closed by the valve core linkage to prevent media leakage. Attached Figure Description

[0033] 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.

[0034] Figure 1 An exploded structural diagram illustrating the valve core mounting structure of this utility model;

[0035] Figure 2 An exploded view of the first valve core of this utility model;

[0036] Figure 3 A schematic diagram showing the cross-sectional structure of the first valve core of this utility model;

[0037] Figure 4 This is a schematic diagram showing the structure of the first valve core of this utility model;

[0038] Figure 5 This is a schematic diagram showing the structure of the second valve core of this utility model;

[0039] Figure 6 This is a cross-sectional structural diagram of the valve body of this utility model.

[0040] The symbols in the attached image are explained as follows:

[0041] 1-Valve body; 11-First receiving section; 12-Second receiving section;

[0042] 2-First threaded connector;

[0043] 3-Second threaded connector; 31-Baffle plate;

[0044] 4-First sealing ring;

[0045] 5-First valve core; 51-Second sealing ring; 52-Front section of first valve core; 53-Middle section of first valve core; 54-Rear section of first valve core; 55-Protective cover; 56-Third sealing ring;

[0046] 6-Second valve core; 61-Spring fixing platform; 62-Second valve core body; 63-Guide post; 64-Fourth sealing ring;

[0047] 7-Reset spring; 71-First spring; 72-Second spring;

[0048] 8-Connecting post; 9-Positioning ring. Detailed Implementation

[0049] 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.

[0050] Please refer to Figures 1-6 One embodiment of this utility model provides a valve core mounting structure to prevent the sealing ring from being missing, including: valve body 1, first threaded connector 2, second threaded connector 3, and valve core assembly;

[0051] The first threaded connector 2 is disposed in the first receiving section 11 of the valve body 1;

[0052] The second threaded connector 3 is disposed in the second receiving section 12 of the valve body 1, and a baffle 31 is disposed on the outer side of the second threaded connector 3; a first sealing ring 4 is assembled between the second receiving section 12 and the baffle 31.

[0053] The valve core assembly includes a first valve core 5, a second valve core 6, and a return spring 7. The first valve core 5 is disposed inside the first threaded connector 2, and a third sealing ring 56 is provided at the front end of the first valve core 5. The second valve core 6 is disposed inside the second threaded connector 3. The return spring 7 is sleeved between the first valve core 5 and the second valve core 6 through a connecting post 8.

[0054] The second threaded connector 3 is configured to abut against the first valve core 5 via the second valve core 6 when the first sealing ring 4 is not assembled, thereby causing the first valve core 5 to move forward so that the third sealing ring 56 closes the vent of the valve body 1.

[0055] Understandably, when the second threaded connector 3 is not fitted with the first sealing ring 4, the second threaded connector 3 is over-screwed into the valve body 1. At this time, the second valve core 6 will abut against the first valve core 5 and push it forward. As the first valve core 5 moves forward, the third sealing ring 56 set at its front end will tightly fit the vent of the valve body 1, thereby effectively preventing gas or liquid leakage.

[0056] This embodiment utilizes the interaction between the valve core assemblies and the cooperation between the second threaded connector 3 and the baffle 31 to achieve automatic detection and sealing assurance of whether the first sealing ring 4 is installed. If the first sealing ring 4 is forgotten to be installed, the system can automatically close the vent through the interaction between the second valve core 6 and the first valve core 5, avoiding leakage problems caused by the missing sealing ring.

[0057] Please refer to Figures 2-4In one embodiment of the present invention, the first valve core 5 includes a first valve core front section 52, a first valve core middle section 53 and a first valve core rear section 54; a first groove is provided between the first valve core front section 52 and the first valve core middle section 53, and the first groove is used to provide a second sealing ring 51.

[0058] A protective cover 55 is provided in the middle section 53 of the first valve core. The protective cover 55 is located above the first groove, and the second sealing ring 51 is located between the inner side of the protective cover 55 and the first groove.

[0059] A second groove is provided between the rear section of the valve core and the middle section 53 of the first valve core, and the second groove is used to set the third sealing ring 56.

[0060] The connecting post 8 is connected to the front section 52 of the first valve core.

[0061] Understandably, the second sealing ring 51 and the third sealing ring 56 are used to form a sealing fit with the valve body 1. In this embodiment, the protective cover 55 covers the outside of the second sealing ring 51, effectively blocking particulate impurities in the fluid channel from directly rubbing against the second sealing ring 51, while reducing the scouring effect of high-pressure airflow and particulate impurities on the rubber material, significantly reducing the risk of sealing ring cracking, and extending the service life of the second sealing ring 51. The end of the first threaded connector 2 and the protective cover 55 cooperate to cover the second sealing ring 51, and are tightly fitted 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.

[0062] Please refer to Figures 2-4 In one embodiment of this utility model, the structure of the first valve core 5 is a centrally symmetrical rotating body;

[0063] The outer diameter of the middle section 53 of the first valve core is larger than the outer diameter of the front section 52 of the first valve core.

[0064] The outer diameter of the rear section 54 of the first valve core is less than or equal to the outer diameter of the front section 52 of the first valve core.

[0065] The outer diameter of the second sealing ring 51 is smaller than the inner diameter of the protective cover 55, but larger than the outer diameter of the front section 52 of the first valve core.

[0066] The height of the protective cover 55 is at least half the diameter of the cross-section of the second sealing ring 51.

[0067] Understandably, the outer diameter of the middle section 53 of the first valve core is larger than that of the front section, providing stable support for the protective cover 55 and preventing it from deforming under the action of high-pressure fluid, thus further ensuring the reliability of the seal. The outer diameter of the rear section 54 of the first valve core is designed to be smaller than or equal to that of the front section, which satisfies the requirements of connection and transmission while avoiding unnecessary material waste and processing complexity.

[0068] Furthermore, the height of the protective cover 55 is not less than half the cross-sectional diameter of the second sealing ring 51, ensuring that at least 50% of the vertical part of the sealing ring is wrapped by the protective cover 55 to form a physical barrier. Combined with the truncated cone structure at the end of the first threaded connector 2, under the pressure of the return spring 77, the two together form a protective zone, reducing the direct contact of external particulate impurities with the surface of the sealing ring, while blocking the directional scouring of high-pressure airflow and particulate impurities.

[0069] Please refer to Figure 5 In one embodiment of this utility model, the second valve core 6 includes a spring fixing platform 61, a second valve core body 62, and a guide post 63. One end of the reset spring 77 is sleeved on the spring fixing platform 61. The guide post 63 extends into the guide section of the second threaded connector 3. The second valve core body 62 is provided with a second groove. A fourth sealing ring 64 is provided in the second groove. The outer diameter of the fourth sealing ring 64 is larger than the inner diameter of the guide section of the second threaded connector 3.

[0070] Understandably, the fourth sealing ring 64 further enhances the sealing effect between the second valve core 6 and the second threaded connector 3. When high-pressure fluid passes through, the fourth sealing ring 64 effectively prevents fluid leakage from the connection between the second valve core 6 and the second threaded connector 3, ensuring the overall sealing performance of the quick connector. Simultaneously, the design of the guide post 63 extending into the guide section provides a stable guiding effect for the second valve core 6. Furthermore, the design of the spring fixing platform 61 allows the second spring 72 to be securely mounted on the second valve core 6, providing reliable elastic support for the reset of the second valve core 6.

[0071] Please refer to Figures 1-5 In one embodiment of the present invention, the reset spring 7 includes a first spring 71 and a second spring 72;

[0072] The first spring 71 is disposed between the first valve core 5 and the first threaded connector 2;

[0073] The second spring 72 is disposed between the second valve core 6 and the first threaded connector 2;

[0074] Both the first spring 71 and the second spring 72 are compression springs, and their preload direction is opposite to the medium flow direction.

[0075] The elastic coefficient of the second spring 72 is greater than that of the first spring 71.

[0076] Understandably, the arrangement of the first spring 71 and the second spring 72 allows the valve core to be subjected to a reverse elastic force when the connector is not connected to the gas-using equipment, thus maintaining a stable closed state. When opening is required, the gas-using equipment is connected to the valve core, and the medium pressure can overcome the spring preload, pushing the valve core to move and opening the quick connector. Simultaneously, the elastic coefficient of the second spring 72 is greater than that of the first spring 71; this differentiated spring design not only improves the sealing performance of the quick connector but also ensures its stability and reliability under different pressure environments.

[0077] In one embodiment of the present invention, a positioning retaining ring 9 is further included. The positioning retaining ring 9 is disposed between the first spring 71 and the first threaded connector 2. The positioning retaining ring 9 is used to center the first valve core 5.

[0078] The positioning retaining ring has an outer ring and a centrally located inner ring. The outer ring matches the first threaded connector 2, and the diameter of the inner ring matches the outer diameter of the connecting post 8.

[0079] 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 first spring 71 makes the outer ring fit tightly against the first threaded connector 2, and the connecting post 8 is inserted into the inner ring. The positioning retaining ring 9 is used to make the central axis of the connecting post 8 coincide with the central axis of the first threaded connector 2, thereby achieving centering, avoiding axial displacement of the connecting post 8 when it moves back and forth, and enabling the first valve core 5 and the connecting post 8 to be quickly and accurately positioned and assembled onto the first threaded connector 2, ensuring the consistency of product quality.

[0080] Please refer to Figures 1-5 In one embodiment of the present invention, when a first sealing ring 4 is assembled between the second accommodating section 12 and the baffle 31, the first valve core 5 and the second valve core 6 are configured to close the second accommodating section 12.

[0081] Alternatively, when the first sealing ring 4 is not assembled between the second accommodating section 12 and the baffle 31, the first valve core 5 and the second valve core 6 are configured to simultaneously close the first accommodating section 11 and the second accommodating section 12.

[0082] One embodiment of this utility model also discloses a quick connector, including a valve core mounting structure for preventing the sealing ring from being missed, as described in any of the above embodiments.

[0083] 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. A valve core mounting structure to prevent the sealing ring from being missing, characterized in that, include: Valve body (1), first threaded connector (2), second threaded connector (3), valve core assembly; The first threaded connector (2) is disposed in the first receiving section of the valve body (1); The second threaded connector (3) is disposed in the second receiving section of the valve body (1), and a baffle (31) is disposed on the outside of the second threaded connector (3); a first sealing ring (4) is assembled between the second receiving section and the baffle (31); The valve core assembly includes a first valve core (5), a second valve core (6), and a return spring (7). The first valve core (5) is disposed within the first threaded connector (2), and a third sealing ring (56) is provided at the front end of the first valve core (5). The second valve core (6) is disposed within the second threaded connector (3). The return spring (7) is sleeved between the first valve core (5) and the second valve core (6) via a connecting post (8). The second threaded connector (3) is configured to abut against the first valve core (5) via the second valve core (6) when the first sealing ring (4) is not assembled, and to move the first valve core (5) forward so that the third sealing ring (56) closes the vent of the valve body (1).

2. The valve core mounting structure for preventing the packing ring from being omitted, according to claim 1, wherein The first valve core (5) includes a first valve core front section (52), a first valve core middle section (53) and a first valve core rear section (54); a first groove is provided between the first valve core front section (52) and the first valve core middle section (53), and the first groove is used to provide a second sealing ring (51); The first valve core middle section (53) is provided with a protective cover (55), the protective cover (55) is located above the first groove, and the second sealing ring (51) is located between the inner side of the protective cover (55) and the first groove; A second groove is provided between the rear section (54) of the first valve core and the middle section (53) of the first valve core, and the second groove is used to set the third sealing ring (56); The connecting post (8) is connected to the front section (52) of the first valve core.

3. The valve trim installation structure to prevent misloading of a seal ring according to claim 2, characterized by The first valve core (5) is a centrally symmetrical rotating body; The outer diameter of the middle section (53) of the first valve core is larger than the outer diameter of the front section (52) of the first valve core; The outer diameter of the rear section (54) of the first valve core is less than or equal to the outer diameter of the front section (52) of the first valve core.

4. The valve core mounting structure for preventing the packing ring from being omitted, according to claim 3, wherein The outer diameter of the second sealing ring (51) is smaller than the inner diameter of the protective cover (55) and larger than the outer diameter of the front section (52) of the first valve core; The height of the shield (55) is at least half the diameter of the cross-section of the second sealing ring (51).

5. The valve trim installation structure to prevent misloading of a seal ring according to claim 1, characterized by The second valve core (6) includes a spring fixing platform (61), a second valve core body (62), and a guide post (63). One end of the reset spring (7) is sleeved on the spring fixing platform (61). The guide post (63) extends into the guide section of the second threaded connector (3). The second valve core body (62) is provided with a second groove. A fourth sealing ring (64) is provided in the second groove. The outer diameter of the fourth sealing ring (64) is larger than the inner diameter of the guide section of the second threaded connector (3).

6. The valve trim installation structure to prevent misloading of a seal ring according to claim 1, characterized by The reset spring (7) includes a first spring (71) and a second spring (72); The first spring (71) is disposed between the first valve core (5) and the first threaded connector (2); The second spring (72) is disposed between the second valve core (6) and the first threaded connector (2).

7. The valve trim installation structure to prevent misloading of a seal ring according to claim 6, characterized by Both the first spring (71) and the second spring (72) are compression springs, and their preload direction is opposite to the medium flow direction. The elastic coefficient of the second spring (72) is greater than that of the first spring (71).

8. The valve trim installation structure to prevent misloading of a seal ring according to claim 6, characterized by It also includes a positioning retaining ring (9), which is disposed between the first spring (71) and the first threaded connector (2), and the positioning retaining ring (9) is used to center the first valve core (5); The positioning retaining ring has an outer ring and an inner ring centrally located. The outer ring matches the first threaded connector (2), and the diameter of the inner ring matches the outer diameter of the connecting post (8).

9. The valve core mounting structure for preventing leakage of the sealing ring as described in any one of claims 1-8, characterized in that, When a first sealing ring (4) is assembled between the second accommodating section and the baffle (31), the first valve core (5) and the second valve core (6) are configured to close the second accommodating section; Alternatively, when the first sealing ring (4) is not assembled between the second receiving section and the baffle (31), the first valve core (5) and the second valve core (6) are configured to simultaneously close the first receiving section and the second receiving section.

10. A quick connector, characterized in that, Includes the valve core mounting structure for preventing the sealing ring from being missing, as described in any one of claims 1-9.

Images