Tire valve with self-closing spool

Abstract

This invention proposes a tire valve with a self-sealing valve core, comprising a valve seat, a valve core fixedly connected to the inner side of the valve seat, a valve core needle fixedly connected to the top of the valve core, and a leak-proof mechanism fixedly installed on the top of the valve seat. The leak-proof mechanism includes several housings and an outer leak-proof module. The housings are arranged linearly in series at equal intervals and fixedly installed on the top of the valve seat. During application, this device uses a series sealing mechanism in conjunction with a linkage control mechanism to form a closed loop between routine operation and emergency sealing, simultaneously achieving the convenience of inflation and depressurization and the effectiveness of leak protection. The outer leak-proof module and the one-way sealing module work together to connect internal multiple sealing with external emergency protection, allowing the valve to continuously block gas leakage even when the valve core is damaged. At the same time, a status feedback mechanism enables intuitive fault identification, making operation and maintenance more efficient.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more particularly to a tire valve with a self-sealing valve core. Background Technology

[0002] Currently, in the normal use of automobile tires, tire valves with self-sealing valve cores play a crucial auxiliary role and are one of the core components ensuring the normal operation of tires. Their main functions include tire inflation, gas sealing, and continuous and stable maintenance of tire pressure. Compared with ordinary valves, the core feature of this type of valve is its built-in self-sealing valve core. Its working principle is simple and efficient: during inflation, the air gun is inserted into the valve core to open the air passage, thereby completing the inflation; after inflation, the air gun is pulled out, and the valve core automatically resets, thereby sealing the air passage and preventing air leakage from the tire. Currently, this type of valve is widely used in various motor vehicle tires, especially the special models adapted to TPMS (Tire Pressure Monitoring System), which can work in conjunction with the TPMS to provide real-time feedback of tire pressure data, ensuring vehicle driving safety. The scientific design of its structure is also directly related to the tire sealing performance, tire pressure stability, and ease of use.

[0003] With the continuous development of the automotive industry and the popularization of tire pressure monitoring technology, various technical solutions have been developed for tire valves adapted to TPMS, and related patent technologies are constantly emerging. Among them, Chinese patent with announcement number "CN108799574A" discloses a TPMS-specific valve. This valve adopts a modular assembly structure, consisting of a valve seat, valve core, seal, gasket, nut, and dust cap assembled in a top-to-bottom order. To ensure product quality, the valve core and nut undergo strict testing by a dedicated testing system before assembly. The nut adopts an integrated design of an upper cylindrical threaded section and a lower hexagonal section. The lower end faces of the hexagonal section and the cylindrical threaded section form a limiting step. The overall structure is simple and reasonable, with controllable quality, suitable for industrial mass production, and can also realize automated operation of nut screening and testing, effectively improving testing accuracy and production efficiency.

[0004] However, the valves in the aforementioned existing technologies still have significant defects in practical applications and are difficult to meet the requirements of vehicle driving safety. The valves rely on a single valve core for sealing and lack a multi-layer sealing and protection structure. When the built-in valve core is damaged due to wear, aging, or vibration and impact, it will cause the tire to leak slowly. This leakage is insidious and not easily detected in the early stages. Over time, it will cause the tire pressure to drop continuously, which will not only affect the vehicle's handling performance and cause driving malfunctions, but also accelerate tire wear. Especially on highways, tires with abnormal tire pressure are very likely to lose control and blow out, directly causing traffic accidents and posing a great threat to the life and property safety of drivers and passengers. Therefore, it is urgent to improve its design. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes a tire valve with a self-sealing valve core, which more accurately solves the problems described above.

[0006] This invention is achieved through the following technical solution: This invention proposes a tire valve with a self-sealing valve core, including a valve seat, a valve core fixedly connected to the inner side of the valve seat, a valve core needle fixedly connected to the top of the valve core, and a leak-proof mechanism fixedly installed on the top of the valve seat. The leak-proof mechanism includes several housings and an external leak-proof module. The housings are arranged linearly in series at equal intervals and fixedly installed on the top of the valve seat. The housings are connected in series with each other. A one-way sealing module is fixedly installed inside each housing. A threaded interface is fixedly installed at the top of the topmost housing. The external leak-proof module is threaded to the outside of the threaded interface. A connecting groove is opened in the middle of both ends of each housing. During specific applications, the number of housings and their internal one-way sealing modules can be flexibly selected according to the sealing requirements.

[0007] Furthermore, the one-way sealing module includes a fixed bottom ring, which is fixedly connected to the bottom of the housing. A telescopic spring is fixedly connected to the top of the fixed bottom ring, and a first airbag sealing assembly is fixedly connected to the top of the telescopic spring. Several housings are interconnected through a connecting groove, and the valve core extends into the interior of the lowest housing through the connecting groove at the lowest end.

[0008] Furthermore, the first airbag sealing assembly includes a top plate, which is fixedly connected to the top of the telescopic spring. An inner sealing plug is fixedly connected to the top of the top plate, and a first sealing airbag is fixedly installed on the outer middle of the inner sealing plug. An air inlet groove is provided at the bottom of the top plate, and the top of the air inlet groove communicates with the first sealing airbag. The first sealing airbag is arranged in a ring shape. When the valve core is damaged and leaks gas, the leaked gas enters the first sealing airbag through the air inlet groove, causing the first sealing airbag to expand and seal the gap between the inner sealing plug and the communicating groove, thus achieving a strong sealing effect.

[0009] Furthermore, a guide block is fixedly connected to the top of the inner sealing plug, and the guide block is generally conical in shape to guide the insertion into the communicating groove.

[0010] Furthermore, guide sleeves are fixedly installed in a ring at equal intervals on the outer side of the top plate, and a support slide rod is slidably connected to the inner side of the guide sleeve. The top of the support slide rod is connected to the top of the inner shell, and a push pin is fixedly connected to the top of the guide block at the very top.

[0011] Furthermore, an inner frame is fixedly connected to the bottom of the top plate, and a push rod is fixedly connected to the bottom of the inner frame. The bottom end of each push rod is in contact with the top of the guide block located below it, and the push rod at the lowest end is in contact with the top of the valve core needle. During use, by pushing the push pin located at the top, the inner sealing plug can be squeezed and pushed down. Each top plate has a push rod at the bottom, so each push rod can push the top plate located below down at one time, thereby causing all the inner sealing plugs to disengage from the connecting groove. At this time, the connection between each housing can be opened. The push rod at the bottom can push the valve core needle at the bottom to open the valve core, so that the tire can be depressurized or inflated.

[0012] Furthermore, the external leak-proof module includes a threaded cap, which is threadedly connected to the outside of the threaded interface, and an internal sealing component is fixedly connected inside the threaded cap.

[0013] Furthermore, the outer surface of the threaded cap is provided with anti-slip stripes at equal intervals, and an outer sealing gasket is fixedly connected to the bottom end of the outer surface of the threaded cap.

[0014] Furthermore, the internal sealing assembly includes a rotary joint, which is fixedly connected to the top of the threaded cap. An armored connecting hose is fixedly installed at the outer end of the rotary joint. The outer end of the armored connecting hose is connected to one side of the topmost housing. An external sealing plug is fixedly installed at the output end of the rotary joint located inside the threaded cap. A second sealing airbag is fixedly connected to the bottom end of the external sealing plug. The external sealing plug is inserted into the threaded interface. The second sealing airbag is connected to the armored connecting hose through the rotary joint.

[0015] Furthermore, a regulating valve is fixedly connected to the outer side of the rotary joint. The input end of the regulating valve is connected to the armored connecting hose. The outer end of the armored connecting hose is equipped with a one-way valve. The one-way valve is used to prevent leaked gas from entering the second sealing airbag during application, thus avoiding gas diversion. Simultaneously, in conjunction with the regulating valve, it can independently discharge the gas inside the second sealing airbag, preventing the second sealing airbag and its armored connecting hose from remaining connected to the shell, which could hinder rapid depressurization within the second sealing airbag. The regulating valve is used to discharge the gas inside the second sealing airbag during application. The gas inside the sealing airbag is used for venting when the threaded cap needs to be opened after a leak. The armored connecting hose has strong pressure resistance and a long service life. However, due to its heavy weight, the internal air pressure of the valve core is low when there is no leak, so it is in a loose state. When the valve core leaks, the gas will enter the second sealing airbag through the armored connecting hose. At this time, the armored connecting hose is lifted by the air pressure and is in a taut and upright state. Therefore, the condition of the armored connecting hose can be observed to determine whether there is a leak in the valve.

[0016] The beneficial effects of this invention are: 1. During the application of this technical solution, multiple sets of shells connected in series and one-way sealing modules are used in conjunction with each other. The first airbag sealing component is supported by telescopic springs and fixed bottom rings. When the valve core is damaged and leakage occurs, the leaked gas can enter the first sealing airbag through the air inlet groove of the top plate, causing the airbag to expand and seal the gap of the connecting groove, thus achieving single-stage sealing protection. The multiple sets of shells are arranged in series, so that after the gas breaks through one stage of sealing, the one-way sealing module of the next stage shell can repeatedly trigger the sealing action, forming a multi-layer progressive protection, so that gas leakage is blocked layer by layer, avoiding slow leakage. The guide side sleeve and the supporting slide rod cooperate with the top plate to make the inner sealing plug move smoothly, ensuring that each sealing section can fit tightly with the connecting groove. The push rod and the ejector pin are linked, so that all sealing structures can be opened simultaneously during normal inflation and depressurization, making the operation more convenient. 2. During the application of this technical solution, by setting up the various structures of the external leak-proof module to cooperate with each other, the armored connecting hose connects the rotary joint to the top shell, so that when the valve core leaks, the leaking gas can be transmitted to the second sealing airbag through the hose, causing the airbag to expand and lock the threaded interface, forming an external auxiliary seal to further prevent gas leakage. The regulating valve cooperates with the rotary joint, so that when the second sealing airbag expands and locks the threaded cover, the gas inside the airbag can be discharged by rotating the regulating valve, allowing the threaded cover to be easily removed without affecting subsequent inflation and depressurization operations. The threaded cover cooperates with the external sealing gasket, so that external protection can be formed under normal sealing conditions. The armored connecting hose can change its state with the air pressure, and the operator can intuitively judge whether there is a leak by its state, so that the problem can be detected and dealt with in a timely manner without the need for professional equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the external leak-proof module of the present invention; Figure 3 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 4 This is a top view of the external leak-proof module of the present invention in the removed state; Figure 5 For the present invention Figure 2 A magnified structural diagram at point A; Figure 6 This is a schematic diagram of the external leak-proof module structure of the present invention; Figure 7 For the present invention Figure 3 A magnified structural diagram at point B; Figure 8 This is a schematic diagram of the unidirectional sealing module structure of the present invention.

[0018] In the diagram: 1. Valve seat; 2. Valve core; 3. Valve needle; 4. Leak prevention mechanism; 41. Housing; 42. External leak prevention module; 421. Threaded cap; 422. Internal sealing assembly; 4221. Rotary joint; 4222. Armored connecting hose; 4223. External sealing plug; 4224. Second sealing airbag; 4225. Control valve; 423. Anti-slip stripe; 424. External sealing gasket; 43. One-way sealing module Group; 431, fixed bottom ring; 432, telescopic spring; 433, first airbag sealing assembly; 4331, top plate; 4332, inner sealing plug; 4333, first sealing airbag; 4334, air inlet groove; 4335, guide block; 4336, guide side sleeve; 4337, support slide rod; 4338, push pin; 4339, inner frame; 43310, push rod; 44, threaded interface; 45, connecting groove. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0020] Combination Figures 1-8 As shown, a tire valve with a self-sealing valve core includes a valve seat 1, a valve core 2 fixedly connected to the inner side of the valve seat 1, a valve core needle 3 fixedly connected to the top of the valve core 2, and a leak-proof mechanism 4 fixedly installed on the top of the valve seat 1. The leak-proof mechanism 4 includes several housings 41 and an external leak-proof module 42. The housings 41 are arranged linearly in series at equal intervals and fixedly installed on the top of the valve seat 1. The housings 41 are connected in series with each other. A one-way sealing module 43 is fixedly installed inside each housing 41. A threaded interface 44 is fixedly installed at the top of the topmost housing 41. The external leak-proof module 42 is threaded to the outside of the threaded interface 44. A connecting groove 45 is provided at the middle of both ends of each housing 41. By setting up the leak-proof mechanism 4, a basic seal can be achieved by relying on the valve core 2 inside the valve seat 1 during use. The valve core needle 3 works with the valve core 2 to ensure the effectiveness of the seal. The several housings 41 in the leak-proof mechanism 4... The components are arranged in a linear series and interconnected. The one-way sealing module 43 inside the housing 41 can work with the connecting groove 45 to achieve gas sealing, preventing gas from leaking at will. The threaded interface 44 of the top housing 41 is threadedly connected to the outer anti-leakage module 42, which can further enhance the sealing effect. In use, the valve core 2 achieves self-sealing. The housing 41 and the one-way sealing module 43 work together to form multiple sealing protections. The outer anti-leakage module 42 provides auxiliary sealing from the outside. By setting these structures together, gas leakage can be effectively prevented, keeping the tire pressure stable. The threaded connection of the outer anti-leakage module 42 also makes it easy to install and disassemble. It can be flexibly operated according to usage needs, and the start and stop of sealing protection can be completed without complicated procedures.

[0021] Combination Figures 1-3 and Figure 8 As shown, the one-way sealing module 43 includes a fixed bottom ring 431, which is fixedly connected to the bottom of the housing 41. A telescopic spring 432 is fixedly connected to the top of the fixed bottom ring 431. A first airbag sealing assembly 433 is fixedly connected to the top of the telescopic spring 432. Several housings 41 are interconnected through a connecting groove 45. The valve core needle 3 extends into the interior of the lowest housing 41 through the connecting groove 45 at the lowest end. The first airbag sealing assembly 433 includes a top plate 4331, which is fixedly connected to the top of the telescopic spring 432. An inner sealing plug 4332 is fixedly connected to the top of the top plate 4331. A first sealing airbag 4333 is fixedly installed on the middle of the outer side of the inner sealing plug 4332. An air inlet groove 4334 is opened at the bottom of the top plate 4331. The top of the air inlet groove 4334 is connected to the first sealing airbag 4333. The first sealing airbag 4333 is arranged in a ring shape.

[0022] The technical solution in the above-described embodiments of this application, by setting a one-way sealing module 43, allows the telescopic spring 432 to support the first airbag sealing assembly 433 during use. The fixed bottom ring 431 provides a supporting base for the telescopic spring 432. The valve core needle 3 extends into the interior of the lowest housing 41. Several housings 41 are connected by a connecting groove 45. When gas leaks from the valve core needle 3 and enters the housing 41, the gas will enter the first sealing airbag 4333 through the air inlet groove 4334 at the bottom of the top plate 4331, thus making the annular first sealing airbag 4333 effective. When the airbag 4333 inflates, the first sealing airbag 4333 will fit against the outside of the inner sealing plug 4332 after inflation. Together with the inner sealing plug 4332, it will act at the connecting groove 45 to seal the leaking gas. The support of the telescopic spring 432 will keep the first airbag sealing component 433 always maintaining the sealing tendency of the connecting groove 45. The connection design between the air inlet groove 4334 and the first sealing airbag 4333 allows the leaking gas to directly trigger the sealing action, forming a passive sealing protection and effectively blocking the gas leakage. Example 2

[0023] Combination Figures 1-4 and Figure 8 As shown, a guide block 4335 is fixedly connected to the top of the inner sealing plug 4332. The guide block 4335 is cone-shaped and is used to guide the insertion into the communicating groove 45. Guide side sleeves 4336 are fixedly installed in a ring at equal intervals on the outer side of the top plate 4331. A support slide rod 4337 is slidably connected to the inner side of the guide side sleeve 4336. The top of the support slide rod 4337 is connected to the top of the inner shell 41. A push pin 4338 is fixedly connected to the top of the guide block 4335 at the topmost point. An inner frame 4339 is fixedly connected to the bottom of the top plate 4331. A push rod 43310 is fixedly connected to the bottom of the inner frame 4339. The bottom of the push rod 43310 is in contact with the top of the guide block 4335 below it. The push rod 43310 at the lowest end is in contact with the top of the valve core needle 3.

[0024] The technical solution in the above-described embodiments of this application, by setting a guide block 4335 and a guide sleeve 4336, allows the conical guide block 4335 to guide the inner sealing plug 4332 into the communicating groove 45 during use. The supporting slide rod 4337 and the guide sleeve 4336 slide in cooperation, allowing the top plate 4331 to maintain a predetermined trajectory when moving. When it is necessary to open the sealing structure, pressing the top push pin 4338 will cause the top guide block 4335 to move down, thereby pushing the push rod 43310 that is in contact with it. The push rod 43310 then pushes the guide block below. The push rods 4335 and 4331, along with the push rods 43310 of each layer, sequentially transmit force, causing all the top plates 4331 to move down synchronously. The push rod 43310 at the lowest end will then touch the valve core needle 3. This linkage design allows a single press to disengage all the inner sealing plugs 4332 from the connecting groove 45, while simultaneously triggering the valve core needle 3. The guide structure ensures that the components do not shift during movement. The cooperation between the push rod 43310 and the inner frame 4339 makes the force transmission continuous and direct, achieving synchronous control of multiple sealing structures and valve core needle 3, completing the preliminary preparation for inflation or depressurization. Example 3

[0025] Combination Figures 3-7 As shown, the external leak-proof module 42 includes a threaded cover 421, which is threaded to the outside of the threaded interface 44. An internal sealing assembly 422 is fixedly connected inside the threaded cover 421. Anti-slip stripes 423 are evenly spaced on the outer surface of the threaded cover 421. An external sealing gasket 424 is fixedly connected to the bottom of the outer surface of the threaded cover 421. The internal sealing assembly 422 includes a rotary joint 4221, which is fixedly connected to the top of the threaded cover 421. An armored connecting hose 4222 is fixedly installed at the outer end of the rotary joint 4221. The outer end of the armored connecting hose 4222 is connected to one side of the topmost housing 41. An external sealing plug 4223 is fixedly installed at the output end of the rotary joint 4221 inside the threaded cover 421. A second sealing gasket is fixedly connected to the bottom end of the external sealing plug 4223. The second sealing airbag 4224, with an outer sealing plug 4223 inserted inside the threaded interface 44, is connected to the armored connecting hose 4222 via a rotary joint 4221. A regulating valve 4225 is fixedly connected to the outside of the rotary joint 4221. The input end of the regulating valve 4225 is connected to the armored connecting hose 4222. A one-way valve is provided at the outer end of the armored connecting hose 4222. The one-way valve is used to prevent leaked gas from entering the second sealing airbag 4224 during application, thus avoiding gas diversion. At the same time, in conjunction with the regulating valve 4225, the gas inside the second sealing airbag 4224 can be discharged independently, preventing the second sealing airbag 4224 and its armored connecting hose 4222 from being constantly connected to the housing 41, which would prevent the rapid depressurization of the second sealing airbag 4224.

[0026] The technical solution in the above-described embodiments of this application, by setting an external leak-proof module 42, allows the threaded cover 421 and the threaded interface 44 to form a threaded connection during use. The anti-slip stripes 423 on the outer surface facilitate the operator's rotation operation. The outer sealing gasket 424 at the bottom fits against the outside of the threaded interface 44, forming a basic external seal. The rotary joint 4221 in the inner sealing assembly 422 is fixed to the top of the threaded cover 421. The armored connecting hose 4222 connects the rotary joint 4221 to the topmost housing 41, realizing the connection of the gas passage. The outer sealing plug 4223 is inserted into the threaded interface 44, and the second sealing airbag 4224 at its bottom is connected to the armored connecting hose 4222 through the rotary joint 4221. In the event of a gas leak, the leaked gas can enter the armored connecting hose 4222 through the top housing 41, and then enter the second sealing airbag 4224 through the rotary joint 4221. This causes the second sealing airbag 4224 to expand, thereby sealing the gap between the outer sealing plug 4223 and the threaded interface 44, achieving external auxiliary sealing. The regulating valve 4225 on the outside of the rotary joint 4221 is connected to the armored connecting hose 4222. The regulating valve 4225 can control the venting operation of the second sealing airbag 4224. When it is necessary to remove the threaded cover 421, the gas in the second sealing airbag 4224 is released, causing it to contract and release the clamping on the threaded interface 44, facilitating the removal and installation of the threaded cover 421.

[0027] The operating principle and advantages of this invention are as follows: During the application of this device, under normal sealing conditions, the valve core 2 remains closed, achieving basic sealing. The housings 41 are installed in a linear series, connected by a connecting groove 45. The valve core needle 3 extends to the interior of the lowest housing 41. The fixing bottom ring 431 supports the telescopic spring 432. The telescopic spring 432 drives the first airbag sealing assembly 433, causing the inner sealing plug 4332 to insert into the connecting groove 45, thereby completing the initial sealing of a single housing 41. The guide block 4335 plays a guiding role during insertion. The guide side sleeve 4336 cooperates with the support slide rod 4337 to limit the movement direction of the top plate 4331. The threaded cover 421 is connected to the threaded interface 44. The outer sealing plug 4223 is inserted into the threaded interface 44. The second sealing airbag 4224 is in an uninflated state. The armored connecting hose 4222 connects the rotary joint 4221 to the top shell 41 and remains in a loose state. The outer sealing gasket 424 is attached to the outside of the threaded interface 44 to form an external seal.

[0028] When it is necessary to inflate or deflate the tire, since the second sealing airbag 4224 is in an uninflated state under normal conditions, simply rotate the threaded cover 421 to remove it from the threaded interface 44. Then, manually push the outermost push pin 4338. Pushing the push pin 4338 will move the top plate 4331 and the inner sealing plug 4332 downwards, thereby causing the inner sealing plug 4332 to disengage from the connecting groove 45. The push rod 43310 at the bottom of the top plate 4331 will also move downwards, pushing the guide block 4335 and the top plate 4331 to move synchronously. The push rods 43310 inside each housing 41 will be linked in sequence, so that all the inner sealing plugs 4332 will disengage from their corresponding connecting grooves 45. 41 A continuous gas channel is formed through the connecting groove 45. The bottom push rod 43310 pushes the valve core needle 3, causing the valve core 2 to open. During inflation, the gas enters from the threaded interface 44, passes through the connecting channels of each housing 41 and the valve core 2 in sequence, and finally enters the tire. During depressurization, the gas inside the tire can be discharged directly through the connecting groove 45 and the threaded interface 44 along the opposite path. After the operation is completed, the push pin 4338 is released, and the telescopic spring 432 drives each top plate 4331 and the inner sealing plug 4332 to reset. The inner sealing plug 4332 is reinserted into the connecting groove 45, the valve core 2 closes, and the threaded cover 421 is reconnected to the threaded interface 44. The device returns to its normal sealing state.

[0029] When the valve core 2 is damaged and causes a leak, the leaking gas first enters the interior of the lowest housing 41, and then enters the first sealing airbag 4333 through the air inlet groove 4334 at the bottom of the top plate 4331. After the first sealing airbag 4333 inflates, it seals the gap between the inner sealing plug 4332 and the connecting groove 45, thus further performing emergency sealing. If the gas breaks through this section of the seal, that is, if the bottom housing 41 leaks, the gas will enter the upper housing 41, and the first sealing airbag 4333 of the corresponding housing 41 will repeat the above action to achieve subsequent segmented sealing. If the top inner sealing plug 4332 leaks, the leaking gas will then... Gas enters the armored connecting hose 4222 through the top housing 41, and is then filled into the second sealing airbag 4224 via the rotary joint 4221. After the second sealing airbag 4224 expands, it seals the gap between the outer sealing plug 4223 and the threaded interface 44, completing the external emergency sealing. As gas continues to be filled, the internal air pressure of the armored connecting hose 4222 continuously increases, changing from the original relaxed state to a taut and upright state. By observing the state of the armored connecting hose 4222, the operator can determine that the device has a gas leakage fault. When it is necessary to depressurize the second sealing airbag 4224, simply open the regulating valve 4225 to release the gas inside the second sealing airbag 4224.

[0030] When a leak occurs in this device, the second sealing airbag 4224 will be inflated by the leaking gas, thereby jamming the threaded interface 44 and preventing the threaded cover 421 from being directly unscrewed. Only then is the regulating valve 4225 required, and the armored connecting hose 4222 only functions in this state. One end of the armored connecting hose 4222 is connected to the rotary joint 4221, and the other end is connected to the top housing 41. Its core function is to transfer the leaking gas to the second sealing airbag 4224 when there is a leak, causing the second sealing airbag 4224 to inflate and achieve external sealing. When it is necessary to depressurize, inflate, or remove the threaded cover 421, the operator rotates the regulating valve 4225, which, through the rotary joint 4221, opens the second sealing airbag. The gas inside the airbag 4224 is discharged, and this discharged gas is discharged through the armored connecting hose 4222. After the second sealing airbag 4224 contracts, the jamming between it and the threaded interface 44 is released. Then, the threaded cover 421 can be easily rotated and removed from the threaded interface 44 for subsequent deflation, inflation, or related operations. After the operation is completed, the threaded cover 421 is reconnected to the threaded interface 44. If there is still leakage gas, the leaked gas can re-enter the second sealing airbag 4224 through the armored connecting hose 4222, causing the second sealing airbag 4224 to re-inflate and reset, and the outer leak-proof module 42 to return to a sealed state. This technical solution uses multiple sets of series-connected shells 41 and a single The sealing module 43 can form multiple emergency seals when the valve core 2 is damaged, preventing slow tire leakage and solving the problems existing in the prior art. The push rod 43310 enables the linkage control of multiple unidirectional sealing modules 43 with the valve core 2, making inflation and depressurization operations more convenient and allowing the entire process to be completed without step-by-step operations. The guide block 4335 and guide sleeve 4336, in conjunction with the support slide rod 4337, ensure smoother movement of the inner sealing plug 4332, preventing displacement from affecting the sealing effect. The armored connecting hose 4222 features a pressure-resistant design and is only used to transmit gas in the event of a leak, working with the regulating valve 4225 to achieve a second... The degassing of the sealing airbag 4224 allows for visual detection of leaks through changes in its own state, enabling operators to quickly identify leaks without the need for specialized testing equipment. The regulating valve 4225 controls the degassing of the second sealing airbag 4224, ensuring smooth gas discharge even in leaky conditions and releasing the threaded cap 421 from its locked position for easier subsequent operation. The threaded cap 421 features a detachable connection, allowing it to be directly unscrewed under normal conditions, further reducing operational difficulty and extending the overall lifespan of the device. The external sealing gasket 424 and the second sealing airbag 4224 work together to further enhance the sealing effect of the device and reduce the occurrence of gas leaks.

[0031] Of course, the present invention may have many other embodiments. Based on this embodiment, other embodiments obtained by those skilled in the art without any creative effort are all within the scope of protection of the present invention.

Claims

1. A tire valve with a self-sealing valve core, characterized in that, Includes a valve seat (1), a valve core (2) is fixedly connected to the inner side of the valve seat (1), a valve core needle (3) is fixedly connected to the top of the valve core (2), and a leak-proof mechanism (4) is fixedly installed on the top of the valve seat (1). The leak prevention mechanism (4) includes several housings (41) and an external leak prevention module (42). Several housings (41) are arranged in a linear series at equal intervals and fixedly installed on the top of the valve seat (1). Several housings (41) are connected in series and are connected in series. A one-way sealing module (43) is fixedly installed inside the housing (41). A threaded interface (44) is fixedly installed at the top of the housing (41) at the top of the several housings (41). The external leak prevention module (42) is threaded to the outside of the threaded interface (44). A connecting groove (45) is opened in the middle of both ends of the housing (41).

2. A tire valve with a self-sealing valve core according to claim 1, characterized in that, The one-way sealing module (43) includes a fixed bottom ring (431), which is fixedly connected to the bottom of the housing (41). A telescopic spring (432) is fixedly connected to the top of the fixed bottom ring (431), and a first airbag sealing assembly (433) is fixedly connected to the top of the telescopic spring (432). Several housings (41) are interconnected through a connecting groove (45). The valve core needle (3) extends into the interior of the lowest housing (41) through the connecting groove (45) at the lowest end.

3. A tire valve with a self-sealing valve core according to claim 2, characterized in that, The first airbag sealing assembly (433) includes a top plate (4331), which is fixedly connected to the top of the telescopic spring (432). An inner sealing plug (4332) is fixedly connected to the top of the top plate (4331). A first sealing airbag (4333) is fixedly installed on the outer middle of the inner sealing plug (4332). An air inlet groove (4334) is provided at the bottom of the top plate (4331). The top of the air inlet groove (4334) is connected to the first sealing airbag (4333). The first sealing airbag (4333) is arranged in a ring shape.

4. A tire valve with a self-sealing valve core according to claim 3, characterized in that, The top of the inner sealing plug (4332) is fixedly connected to a guide block (4335), which is cone-shaped and used to guide the insertion into the communicating groove (45).

5. A tire valve with a self-sealing valve core according to claim 4, characterized in that, The top plate (4331) is fixedly installed with guide sleeves (4336) arranged in a ring at equal intervals on the outer side. The inner side of the guide sleeves (4336) is slidably connected with a support slide rod (4337). The top of the support slide rod (4337) is connected to the top of the inner shell (41). The top of the guide block (4335) at the top end is fixedly connected with a push pin (4338).

6. A tire valve with a self-sealing valve core according to claim 5, characterized in that, The bottom of the top plate (4331) is fixedly connected to the inner frame (4339), and the bottom of the inner frame (4339) is fixedly connected to the push rod (43310). The bottom end of the push rod (43310) is in contact with the top of the guide block (4335) located below it, and the push rod (43310) at the lowest end is in contact with the top of the valve core needle (3).

7. A tire valve with a self-sealing valve core according to claim 6, characterized in that, The external leak-proof module (42) includes a threaded cover (421), which is threaded to the outside of the threaded interface (44), and an internal sealing component (422) is fixedly connected inside the threaded cover (421).

8. A tire valve with a self-sealing valve core according to claim 7, characterized in that, The outer surface of the threaded cap (421) is provided with anti-slip stripes (423) at equal intervals, and an outer sealing gasket (424) is fixedly connected to the bottom of the outer surface of the threaded cap (421).

9. A tire valve with a self-sealing valve core according to claim 8, characterized in that, The internal sealing assembly (422) includes a rotary joint (4221), which is fixedly connected to the top of the threaded cover (421). An armored connecting hose (4222) is fixedly installed at the outer end of the rotary joint (4221). The outer end of the armored connecting hose (4222) is connected to one side of the topmost housing (41). An external sealing plug (4223) is fixedly installed at the output end of the rotary joint (4221) inside the threaded cover (421). A second sealing airbag (4224) is fixedly connected at the bottom end of the external sealing plug (4223). The external sealing plug (4223) is inserted into the threaded interface (44). The second sealing airbag (4224) is connected to the armored connecting hose (4222) through the rotary joint (4221).

10. A tire valve with a self-sealing valve core according to claim 9, characterized in that, A regulating valve (4225) is fixedly connected to the outside of the rotary joint (4221). The input end of the regulating valve (4225) is connected to the armored connecting hose (4222). The outer end of the armored connecting hose (4222) is provided with a one-way valve.

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