Anti-collision self-closing valve

Abstract

The present application relates to pipeline connecting device technical field, disclose a kind of anti-collision self-closing valve, including valve body, screw body, the valve core assembly with bidirectional sealing valve, reset spring, connecting nut and connecting core. Screw body inside has guide section and connecting section, the inner diameter of guide section is less than the inner diameter of connecting section, the connecting section outer surface of screw body is connected with the inner surface of valve body axial thread, the connecting inner surface of guide section outer surface is connected with the connecting nut thread, connecting core is communicated with screw body and is sealed and fixed with screw body by connecting nut. The contact end surface of connecting core and screw body is equipped with first sealing ring. Its beneficial effect is that, anti-collision self-closing valve has two sealing layers, when one layer leaks, another layer also has leak protection, can effectively minimize leakage;Easy to discharge dirt adhered on sealing ring;With aging leakage prediction function;Valve body protective cover effectively prevents external collision and dirt from penetrating into screw body;Wide application range.

Description

Technical Field

[0001] This invention relates to the field of pipeline connection device technology, and in particular to an anti-collision self-closing valve. Background Technology

[0002] Modern heavy industry enterprises, considering safety and other factors, have largely converted most on-site tools from electric to pneumatic. This necessitates the use of numerous pneumatic supply systems to meet diverse production needs. For example, industries such as intelligent manufacturing, automobile manufacturing, and shipbuilding all require energy transmission equipment. During fluid transmission, pipes are connected to the usage ports, and then branches from the usage ports to the equipment. All port connections are exposed and frequently moved during production. Even slight carelessness can lead to collisions and damage, rendering them unusable. Furthermore, dust, dirt, and other contaminants can easily seep into the structure of the connecting valves, causing wear and tear. Over time, this can lead to leaks, and in severe cases, render the connections unusable. The problems are even more severe for valves installed outdoors, posing serious safety hazards and disrupting normal production. Summary of the Invention

[0003] The purpose of this invention is to provide a compact connection sealing valve with effective anti-collision performance.

[0004] To achieve the above objectives, the present invention provides an anti-collision self-closing valve, comprising a valve body, a threaded body, a valve core assembly with a bidirectional sealing valve, a return spring, a connecting nut, and a connecting core.

[0005] The threaded body has a guide section and a connecting section inside. The inner diameter of the guide section is smaller than that of the connecting section. The outer surface of the connecting section of the threaded body is axially threaded to the inner surface of the valve body. The outer surface of the guide section is threaded to the inner surface of the connecting nut. The connecting core communicates with the threaded body and is sealed and fixed to the threaded body through the connecting nut. The valve body has a receiving cavity to accommodate the threaded body connecting section and the connecting nut. The threaded body is connected to the valve body and fixed in the receiving cavity. The valve core assembly is set inside the tube connecting the valve body and the threaded body. A return spring is sleeved on the outside of the valve core assembly. The valve core assembly, the protruding structure on the inner surface of the valve body and the end face of the threaded body guide section together form a sealing cavity.

[0006] Preferably, the valve core assembly includes a first vent valve, a second vent valve, a connecting post, a first baffle, and a second baffle; the reset spring includes a first spring and a second spring.

[0007] The valve body is located outside the threaded body. The threaded body is threadedly connected to the valve body from one side of the sealing cavity. The raised structure on the inner surface of the valve body is a raised ring. The first vent valve abuts against the raised ring from the outside of the other side of the sealing cavity. The first vent valve is connected to a connecting post along the direction inside the sealing cavity. A first baffle is sleeved on the side of the connecting post near the first vent valve. It can move axially along the connecting post and is restricted within the sealing cavity. A second baffle is fixed on the side of the connecting post away from the first vent valve. The second vent valve is located inside the sealing cavity and between the threaded body guide section and the connecting post. The second vent valve abuts against the end face of the threaded body guide section.

[0008] A reset spring is sleeved on the connecting post between the first vent valve and the second vent valve. One end of the first spring abuts against the first baffle, and the other end of the first spring abuts against the second vent valve. The second spring is located inside the first spring. One end of the second spring abuts against the first baffle, and the other end of the second spring abuts against the second baffle.

[0009] Preferably, the first vent valve is a centrally symmetrical rotating body. The first vent valve includes a rear section of the first valve body, a middle section of the first valve body, and a front section of the first valve body. The diameter of the rear section of the first valve body is larger than the inner diameter of the convex ring, and the diameter of the front section of the first valve body is smaller than the inner diameter of the convex ring. The middle section of the first valve body is provided with a first groove, and a fifth sealing ring is provided in the first groove. The outer diameter of the fifth sealing ring is larger than the inner diameter of the convex ring.

[0010] Preferably, the second vent valve is a centrally symmetrical rotating body, including a spring fixing platform, a rear section of the second valve body, a middle section of the second valve body, a front section of the second valve body, and a guide post. One end of the first spring is sleeved on the spring fixing platform to limit the radial movement of the first spring. The diameter of the rear section of the second valve body is larger than the inner diameter of the threaded guide section. The front section of the second valve body has a guide post with the same diameter as the front section of the second valve body extending into the threaded guide section. The middle section of the second valve body has 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 threaded guide section.

[0011] Preferably, a limiting boss is provided on the inner surface of the valve body between the convex ring and the first baffle, and the inner diameter of the limiting boss is smaller than that of the first baffle, so that the first baffle abuts against the end face of the limiting boss.

[0012] Preferably, the second baffle is a lock nut that is threadedly connected to the connecting post, and the connecting post is provided with an external thread that mates with the lock nut.

[0013] Preferably, the convex ring has a beveled end and a flat end, the cylindrical space formed by the flat end is used to accommodate the front section of the first valve body, and the frustum-shaped space formed by the beveled end is used to accommodate the fifth sealing ring.

[0014] Preferably, a third sealing ring is provided on the contact surface of the threaded connection end between the valve body and the threaded body.

[0015] Preferably, the inner side of the guide section of the threaded body is provided with an annular groove, and a second sealing ring that contacts the connecting core is provided in the annular groove.

[0016] Preferably, a first sealing ring is provided on the contact end face between the connecting core and the threaded body.

[0017] The anti-collision self-closing valve of this invention has the following advantages compared with the prior art:

[0018] 1. In a typical self-closing valve, leakage may occur if dirt accumulates on the sealing port or sealing ring when the valve is static. The anti-collision self-closing valve of this invention has two sealing layers. When one layer leaks, the other layer provides leakage protection, effectively minimizing leakage.

[0019] 2. Typical self-closing valves use a single valve core seal. When outputting, a stable flow space is formed between the sealing port or sealing ring and the valve core, making it difficult for dirt to be discharged. However, the rear valve core of a dual-valve core self-closing valve uses a conical seal to guide the flow, preventing the formation of a stable flow space and easily discharging dirt adhering to the sealing ring.

[0020] 3. The sealing structure employs both column-end and shaft-core sealing functions to minimize potential leakage during connection.

[0021] 4. Existing anti-collision self-closing valves with two internal sealing spaces (front and rear) will, under normal circumstances, experience premature fatigue and aging of the valve core in the rear sealing space due to long-term pressure, making this fatigue and aging difficult to detect. Compared to the self-closing valve with the above structure, the self-closing valve of this invention has an aging leakage prediction function. If air flows immediately upon tightening during connection, it is possible that the rear valve core is dirty or aged. If the phenomenon of air flowing immediately upon tightening persists after 2-3 reconnections to remove dirt, the connector needs to be replaced for maintenance.

[0022] 5. The connecting threads of the anti-collision self-closing valve are enclosed by its own valve body, effectively preventing external collisions and dirt from seeping into the thread body; the connecting core is enclosed by a nut, effectively preventing dirt from seeping into the core and resisting external friction.

[0023] The anti-collision self-closing valve of this invention has a wide range of applications and can be used in industries that require multi-point gas supply, such as intelligent manufacturing, automobile manufacturing, repair, and shipbuilding. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the connection structure according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the valve core assembly structure according to an embodiment of the present invention;

[0026] Figure 3 yes Figure 2 A magnified view of a portion of the image;

[0027] In the diagram: 1. Valve body; 2. Threaded body; 3. Valve core assembly; 4. Return spring; 5. Sealing ring; 6. Connecting nut; 7. Connecting core; 8. Raised ring; 9. Limiting boss; 10. Receiving cavity

[0028] 301. First vent valve; 302. Second vent valve; 303. Connecting column; 304. First baffle; 305. Second baffle;

[0029] 3011. Rear section of the first valve body; 3012. Middle section of the first valve body; 3013. Front section of the first valve body;

[0030] 3021. Spring fixing platform; 3022. Rear section of the second valve body; 3023. Middle section of the second valve body; 3024. Front section of the second valve body; 3025. Guide column;

[0031] 401. First spring; 402. Second spring;

[0032] 501, First sealing ring; 502, Second sealing ring; 503, Third sealing ring; 504, Fourth sealing ring; 505, Fifth sealing ring;

[0033] 801. Inclined end; 802. Plane end. Detailed Implementation

[0034] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0035] It should be noted that when a component is referred to as being "set on" or "configured on" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as being "fixed to" another component or "fixedly connected" to another component, the fixing method can be detachable or non-detachable. When a component is considered to be "connected" or "rotatably connected" to another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "left," "right," "upper," "lower," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0037] like Figure 1 As shown, a preferred embodiment of the present invention provides an anti-collision self-closing valve, comprising a valve body 1, a threaded body 2, a valve core assembly 3 with a bidirectional sealing valve, a return spring 4, a connecting nut 6, and a connecting core 7, with a sealing ring 5 provided on each connecting contact surface.

[0038] The threaded body 2 has a guide section and a connecting section inside. The inner diameter of the guide section is smaller than the inner diameter of the connecting section. The outer surface of the connecting section of the threaded body 2 is axially threaded to the inner surface of the valve body 1. The outer surface of the guide section is threaded to the inner surface of the connecting nut 6. The connecting core 7 communicates with the threaded body 2 and is sealed and fixed to the threaded body 2 by the connecting nut 6. A first sealing ring 501 is provided on the contact end face between the connecting core 7 and the threaded body 2. An annular groove is provided on the inner side of the guide section of the threaded body 2, and a second sealing ring 502 is provided in the annular groove that contacts the connecting core 7.

[0039] The valve body 1 has a receiving cavity 10 that accommodates the connecting section of the threaded body 2 and the connecting nut 6. The threaded body 2 is connected to the valve body 1 and fixed in the receiving cavity 10. The receiving cavity 10 is formed by a protective cover extending from the connection point between the valve body 1 and the threaded body 2. A third sealing ring 503 is provided on the contact surface of the threaded connection end between the valve body 1 and the threaded body 2.

[0040] The valve core assembly 3 is disposed inside the tube connecting the valve body 1 and the threaded body 2. A return spring 4 is sleeved on the outside of the valve core assembly 3. The valve core assembly 3, the protruding structure on the inner surface of the valve body 1, and the guide section end face of the threaded body 2 together form a sealing cavity. The connecting nut 6 includes a threaded connection part located inside the receiving cavity 10 and cooperating with the threaded body 2, and a rotating part located outside the receiving cavity 10 for manual tightening.

[0041] like Figure 2 As shown, the valve core assembly 3 includes a first vent valve 301, a second vent valve 302, a connecting post 303, a first baffle 304, and a second baffle 305. The first vent valve 301 is a centrally symmetrical rotating body. The first vent valve 301 includes a first valve body rear section 3011, a first valve body middle section 3012, and a first valve body front section 3013. The diameter of the first valve body rear section 3011 is larger than the inner diameter of the convex ring 8, and the diameter of the first valve body front section 3013 is smaller than the inner diameter of the convex ring 8. The first valve body middle section 3012 is provided with a first groove, and a fifth sealing ring 505 is provided in the first groove. The outer diameter of the fifth sealing ring 505 is larger than the inner diameter of the convex ring 8.

[0042] The second vent valve 302 is a centrally symmetrical rotating body, including a spring fixing platform 3021, a second valve body rear section 3022, a second valve body middle section 3023, a second valve body front section 3024, and a guide post 3025. The left end of the first spring 401 is sleeved on the spring fixing platform 3021 to limit the radial movement of the first spring 401. The diameter of the second valve body rear section 3022 is larger than the inner diameter of the guide section of the threaded body 2. The left side of the second valve body front section 3024 is provided with a guide post 3025 of the same diameter. The second valve body middle section 3023 is provided with a second groove. A fourth sealing ring 504 is provided in the second groove. The outer diameter of the fourth sealing ring 504 is larger than the inner diameter of the guide section of the threaded body 2.

[0043] The reset spring 4 includes a first spring 401 and a second spring 402. The right end of the first spring 401 abuts against the left side of the first baffle 304, and the left end of the first spring 401 abuts against the right side of the second vent valve 302. The second spring 402 is located inside the first spring 401, and the right end of the second spring 402 abuts against the left side of the first baffle 304, and the left end of the second spring 402 abuts against the right side of the second baffle 305.

[0044] Valve body 1 is located on the right side of threaded body 2. The raised structure on the inner surface of valve body 1 is a raised ring 8. The first vent valve 301 abuts against the raised ring 8 from the outside of the right side of the sealing cavity. The first vent valve 301 is connected to the connecting post 303 along the direction inside the sealing cavity. A first baffle 304 is sleeved on the left side of the connecting post 303, which can move axially along the connecting post 303 and is restricted in the sealing cavity. A second baffle 305 is fixed on the left side of the connecting post 303. The second vent valve 302 is located on the left side of the connecting post 303. The second vent valve 302 abuts against the right end face of the guide section of threaded body 2 to the left.

[0045] A first limiting boss 9 is provided on the left side of the convex ring 8, located to the right of the first baffle 304, and the first baffle 304 abuts against the left end face of the first limiting boss 9 to the right. Figure 3 As shown, the convex ring 8 has a beveled end 801 and a flat end 802. The cylindrical space formed by the flat end 802 is used to accommodate the front section 3013 of the first valve body, and the frustum-shaped space formed by the beveled end 801 is used to accommodate the fifth sealing ring 505.

[0046] Preferably, the second baffle 305 is a lock nut that is threadedly connected to the left end of the connecting post 303, and the left end of the connecting post 303 is provided with an external thread that mates with the lock nut.

[0047] The anti-collision self-closing valve of this invention generally consists of two parts during use: the self-closing valve itself and a branch connector.

[0048] 1. The self-closing valve consists of a valve body 1, a double-layer self-closing valve component, and a threaded body for the connection port. It is generally fixed on the output port of various pipelines. When the self-closing valve is not connected to the branch connection body, it is in a self-closing state, that is, both ends of the sealing cavity are in a sealed state.

[0049] 2. The branch connector consists of a connecting nut 6 and a connecting core 7. The branch connector is generally fixed to the hose and is connected to the self-closing valve to form a whole when in use.

[0050] When in use, the self-closing valve connects to the branch connector, opening the pipeline for conveying fluid. The kinetic energy of the fluid opens the sealing chamber of the self-closing valve, allowing the pipeline to pass. When the self-closing valve is disconnected from the branch connector, the sealing chamber of the self-closing valve automatically closes, blocking the flow of fluid.

[0051] The self-closing valve has two valve cores in one space, creating two overlapping self-closing spaces, giving it a double-layer sealing function that is both interconnected and independent.

[0052] When the branch connector is connected to the self-closing valve, the connecting core 7 of the branch connector is engaged into the guide section of the threaded body 2 of the self-closing valve by force. The inner circular wall of the guide section channel has a groove, and the second sealing ring 502 in the groove forms an initial seal with the front end of the cylindrical end of the connecting core 7. At this time, the self-closing valve is in a self-closing state. Under the continuous force of the thread, the cylindrical end pushes the guide post 3025, thereby opening the second vent valve 302. At this time, the pipeline and the inner cavity of the self-closing valve are in a connected state. When the branch connector is tightened relative to the self-closing valve, the first sealing ring 501 in the retaining groove at the end face of the threaded body 2 and the rear end of the cylindrical connecting core 7 is pressed together, and at this time, a leak-free connection state is achieved.

[0053] When the connection is finished, loosen the thread to disconnect the supply channel, so that the two valve cores of the self-closing connection valve are in their own self-closing sealing state.

[0054] The valve core of the self-closing valve has a double sealing structure consisting of a column end seal and a shaft core seal.

[0055] Column end seal: It provides a seal at the initial connection stage. When the connection is first made, the inner circular wall of the valve body channel and the sealing ring in the groove of the front cylindrical end of the connector core form an initial seal to prevent fluid leakage.

[0056] Core-type seal: The sealing ring is located in the groove at the rear end of the connector core and on the inner beveled surface at the front end of the valve body connection port. The seal is achieved through the compression force of the threads.

[0057] The anti-collision self-closing valve of the present invention has a dustproof protective cover structure on the valve body 1, the function of which is mainly as follows:

[0058] 1. An additional protective cover is added to the outside of the external thread. This protective cover is integral with the connector body or external, which can effectively reduce damage caused by external collisions.

[0059] 2. Effectively prevents dirt from entering the threaded connection body and causing wear on the threads.

[0060] 3. The nut has a cylindrical front end and a hexagonal (or knurled) rear end, which is both aesthetically pleasing and does not obstruct normal connection and use.

[0061] 4. The anti-collision connection method is suitable for use in various special environments:

[0062] A. Suitable for frequent use on mobile devices. The connection port is protected by a protective cover, and minor impacts will not damage the protective cover or the threads.

[0063] B. Suitable for use in environments with severe dust pollution (e.g., paint booths, sandblasting booths, and other harsh environments). The anti-collision connection method is a non-exposed connection, and under normal circumstances, dirt is difficult to enter the threaded connection body.

[0064] In summary, this invention provides an anti-collision self-closing valve, comprising a valve body 1, a threaded body 2, a valve core assembly 3 with a bidirectional sealing valve, a return spring 4, a connecting nut 6, and a connecting core 7. The threaded body 2 has a guide section and a connecting section inside, the inner diameter of the guide section being smaller than the inner diameter of the connecting section. The outer surface of the connecting section of the threaded body 2 is axially threaded to the inner surface of the valve body 1, and the outer surface of the guide section is threaded to the inner surface of the connecting nut 6. The connecting core 7 communicates with the threaded body 2 and is sealed and fixed to the threaded body 2 by the connecting nut 6. A first sealing ring 501 is provided on the contact end face between the connecting core 7 and the threaded body 2. Its advantages are that the anti-collision self-closing valve has two sealing layers; when one layer leaks, the other layer provides leak protection, effectively minimizing leakage; it is easy to remove dirt adhering to the sealing ring; it has an aging leakage prediction function; the valve body protective cover effectively prevents external collisions and dirt from seeping into the threaded body; and it has a wide range of applications.

[0065] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. An anti-collision self-closing valve, characterized by: The valve body (1), the threaded body (2), the valve core assembly (3) with bidirectional sealing valve, the reset spring (4), the connecting nut (6) and the connecting core (7) are included. The threaded body (2) has a guide section and a connecting section inside, the inner diameter of the guide section is smaller than that of the connecting section, the connecting section outer surface of the threaded body (2) is axially screwed with the inner surface of the valve body (1), the guide section outer surface is screwed with the connecting inner surface of the connecting nut (6), the connecting core (7) is communicated with the threaded body (2) and is sealed and fixed with the threaded body (2) through the connecting nut (6); the valve body (1) is provided with a containing cavity (10) containing the connecting section of the threaded body (2) and the connecting nut (6), the containing cavity (10) is composed of an integrated protective cover formed by the extension of the connection between the valve body (1) and the threaded body (2), the threaded body (2) is connected and fixed in the containing cavity (10); the valve core assembly (3) is arranged inside the pipe body connected with the threaded body (2) of the valve body (1), the reset spring (4) is arranged outside the valve core assembly (3), the valve core assembly (3), the convex structure arranged on the inner surface of the valve body (1) and the end face of the guide section of the threaded body (2) jointly constitute a sealing cavity, two overlapping self-closing spaces which are communicated with each other and are independent of each other are arranged in the sealing cavity; the valve core assembly (3) includes a first air valve (301), a second air valve (302), a connecting column (303), a first baffle (304) and a second baffle (305); the reset spring (4) includes a first spring (401) and a second spring (402); The valve body (1) is located outside the threaded body (2), the threaded body (2) is screwed with the valve body (1) from one side of the sealing cavity, the convex structure arranged on the inner surface of the valve body (1) is a convex ring (8), the first air valve (301) abuts against the convex ring (8) from the outside of the other side of the sealing cavity, the connecting column (303) is connected with the first air valve (301) in the direction inside the sealing cavity, the first baffle (304) which can move axially along the connecting column (303) and is limited in the sealing cavity is arranged on the side close to the first air valve (301) of the connecting column (303), the second baffle (305) is fixed on the side away from the first air valve (301) of the connecting column (303); the second air valve (302) is located inside the sealing cavity and between the guide section of the threaded body (2) and the connecting column (303), the second air valve (302) abuts against the end face of the guide section of the threaded body (2). The reset spring (4) is sleeved on the connecting column (303) between the first vent valve (301) and the second vent valve (302), one end of the first spring (401) abuts against the first baffle (304), and the other end of the first spring (401) abuts against the second vent valve (302); the second spring (402) is located in the first spring (401), one end of the second spring (402) abuts against the first baffle (304), and the other end of the second spring (402) abuts against the second baffle (305).

2. The anti-collision self-closing valve of claim 1, wherein: The first vent valve (301) is a central symmetric rotary body, the first vent valve (301) comprises a first valve body rear section (3011), a first valve body middle section (3012) and a first valve body front section (3013), the diameter of the first valve body rear section (3011) is greater than the inner diameter of the convex ring (8), the diameter of the first valve body front section (3013) is smaller than the inner diameter of the convex ring (8), and the first valve body middle section (3012) is provided with a first groove, the fifth sealing ring (505) is arranged in the first groove, and the outer diameter of the fifth sealing ring (505) is greater than the inner diameter of the convex ring (8).

3. The anti-collision self-closing valve of claim 1, wherein: The second vent valve (302) is a central symmetric rotary body, comprising a spring fixing table (3021), a second valve body rear section (3022), a second valve body middle section (3023), a second valve body front section (3024) and a guide column (3025), one end of the first spring (401) is sleeved on the spring fixing table (3021) to limit the radial movement of the first spring (401), the diameter of the second valve body rear section (3022) is greater than the inner diameter of the guide section of the threaded body (2), the direction of the second valve body front section (3024) extending into the guide section of the threaded body (2) is provided with the guide column (3025) with the same diameter as the second valve body front section (3024), and the second valve body middle section (3023) is provided with a second groove, the fourth sealing ring (504) is arranged in the second groove, and the outer diameter of the fourth sealing ring (504) is greater than the inner diameter of the guide section of the threaded body (2).

4. The anti-collision self-closing valve of claim 1, wherein: The inner surface of the valve body (1) is provided with a limiting boss (9) between the convex ring (8) and the first baffle (304), the inner diameter of the limiting boss (9) is smaller than the first baffle (304), so that the first baffle (304) abuts against the end face of the limiting boss (9).

5. The anti-collision self-closing valve of claim 1, wherein: The second baffle (305) is a lock nut threadedly connected with the connecting column (303), and the connecting column (303) is provided with external threads matched with the lock nut.

6. The anti-collision self-closing valve of claim 1, wherein: The convex ring (8) has a beveled end (801) and a flat end (802), the flat end (802) forms a cylindrical space for accommodating the first valve body front section (3013), and the beveled end (801) forms a conical frustum space for accommodating the fifth sealing ring (505).

7. The anti-collision self-closing valve of claim 1, wherein: The contact surface of the threaded connection end of the valve body (1) and the threaded body (2) is provided with a third sealing ring (503).

8. The anti-collision self-closing valve of claim 1, wherein: The guide section of the threaded body (2) is provided with a ring groove, and a second sealing ring (502) in contact with the connecting core (7) is arranged in the ring groove.

9. The anti-collision self-closing valve of claim 1, wherein: The contact end face of the connecting core (7) and the threaded body (2) is provided with a first sealing ring (501).

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