CN110671522B

CN110671522B - Inflating valve structure

Info

Publication number: CN110671522B
Application number: CN201910843654.3A
Authority: CN
Inventors: 蒋守国; 李月明
Original assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Geely Automobile Research Institute Ningbo Co Ltd
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2021-02-19
Anticipated expiration: 2039-09-06
Also published as: CN110671522A

Abstract

The invention provides an inflating valve structure, and belongs to the technical field of machinery. It has solved the poor and short problem of life of current inflating valve structure leakproofness. This inflating valve structure, which comprises a spring, the valve inside with be the tube-shape casing, the top of casing has the air inlet, the bottom has the gas outlet, the valve inside slides and sets up in the casing, paste between the periphery wall of valve inside and the inner wall of casing and paste sealedly, the passageway of breathing in has been seted up on the valve inside, the air inlet end of breathing in passageway runs through the top of valve inside and staggers the setting with the air inlet, the end of breathing in passageway can communicate with the gas outlet, the spring both ends are supported respectively and are leaned on casing and valve inside, the valve inside is sealed to lean on the roof at the upper shell under the. The valve core and the shell are simplified to form a matching structure, so that the influence of abrasion is eliminated, multiple sealing is formed between the valve core and the shell, the sealing effect is improved, and the service life is prolonged.

Description

Inflating valve structure

Technical Field

The invention belongs to the technical field of machinery, and relates to an inflating valve structure.

Background

The inflating valve is one-way valve installed on the hub to inflate and deflate tyre, and when opened, the inflating valve makes air enter the space of the tyre without inner tube and then closes automatically to store air to produce air pressure to prevent air from escaping from the tyre or the inner tube.

The existing valve structure, such as the valve of the Chinese patent application (application No. 201410793994.7), comprises a valve body with an air inlet channel, one end of the air inlet channel is an air inlet end, the other end is an air outlet end, the valve body is provided with a valve core inserted in the air inlet channel, the air outlet end of the air inlet channel is provided with an adjusting screw connected with the valve body by screw thread, the axial center of the adjusting screw is provided with an air outlet hole, a control spring is arranged between the adjusting screw and the valve core, one end of the valve core positioned at the air outlet end of the air inlet channel is provided with an annular cone groove and a conical sealing ring arranged in the annular cone groove, the inner side wall of the conical sealing ring is matched with the groove bottom of the annular cone groove, the outer side wall of the conical sealing ring is matched with an annular sealing cone surface arranged in the air inlet channel, one end of the valve body positioned at the air outlet end of the air inlet channel is, the dustproof nut is connected with the valve body through a threaded structure, a first sealing ring is arranged between the end of the valve body and the dustproof nut, a second sealing ring is arranged between the side of the valve body and the dustproof nut, and the first sealing ring and the second sealing ring are fixed on the dustproof nut respectively.

In the valve, the connection and the disconnection between the air inlet end and the air outlet end are realized through a complex matching structure between the valve core and the valve body. The air inlet end and the air outlet end are matched through the conical sealing surface on the valve core and the valve body to realize sealing and separation, and the valve core and the air inlet channel slide mutually, so that the valve core and the air inlet channel are easy to wear after a long time, and the sealing effect is reduced. In addition, in order to realize communication, a gap is required between the upper end of the valve core and the air inlet channel, and the valve core is easy to deflect in the sliding process, so that the conical sealing surface is easy to be not matched in place, and the sealing effect is poor. Simultaneously, the cooperation structure between whole case and the valve body is also comparatively complicated to, after the inflating valve breaks down, can only change whole inflating valve, life is shorter. In order to reduce abrasion and improve sealing effect, the conventional methods include the following steps: the valve core and the valve body are both made of wear-resistant materials, or wear-resistant material layers are coated on the surfaces of the valve core and the valve body, so that the cost is high, or a complex sealing structure is designed in the valve core and the valve body, and the manufacturing difficulty is increased.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides an inflating valve structure, which aims to solve the technical problems that: how to solve the poor and short problem of life of current inflating valve leakproofness.

The purpose of the invention can be realized by the following technical scheme: the utility model provides a valve structure, includes spring, valve inside and is the tube-shape casing, the top of casing has the air inlet, and the bottom has the gas outlet, the valve inside slides and sets up in the casing, paste between the periphery wall of valve inside and the inner wall of casing and paste sealedly, the passageway of crossing gas has been seted up on the valve inside, the inlet end of crossing the passageway run through the top of valve inside and with the setting is staggered to the air inlet, the end of giving vent to anger of crossing the passageway can with the gas outlet intercommunication, the spring both ends are supported respectively and are leaned on casing and valve inside, under the effect of spring the sealed support of valve inside is in on the roof of casing.

The valve inside of the valve structure is arranged in the shell in a sliding mode and directly attached to and sealed with the inner wall of the shell, so that the valve inside and the inner wall of the shell can be directly matched through a single straight barrel surface, the matching structure between the valve inside and the shell is simplified, and the valve inside cannot deflect in the sliding process. Then set up the passageway of breathing freely on the valve core, the inlet end setting of the passageway of breathing freely is at the top of valve core and inlet end and air inlet setting of staggering, under the effect of spring, the valve core seals and leans on the roof of casing, the valve core has realized sealed to the air inlet, the roof of casing has also realized sealed to the inlet end of breathing freely passageway, also realized sealed between the internal perisporium of periphery wall and the casing of valve core, also realized the sealed of three places, even wear and tear has taken place for the relative slip between valve core and the shells inner wall, also can not exert an influence to sealed effect, or even gas leakage has appeared in certain position, also can keep better sealed effect all the time. That is to say, this inflating valve structure adopts anti-conventional design, has eliminated the influence of wearing and tearing through simplifying the cooperation structure between valve inside and the casing, has also improved sealed effect simultaneously, has also reduced the degree of difficulty of preparation to the life of use has been prolonged.

When the valve core is pressed down by external force, the valve core integrally moves downwards, the spring is compressed, the valve core and the top wall of the shell are separated, and the air inlet is communicated with the air outlet through the air passage so as to carry out inflation and exhaust operations. After the completion, external force is cancelled, and under the elastic force effect of spring, the valve inside resets and seals and leans on the roof of casing and realize sealedly.

In the above valve structure, the casing includes a base and an upper casing, the top of the upper casing has the above air inlet, the bottom of the upper casing and the base are detachably and hermetically connected, and the air outlet is located on the base. The base is used for being connected fixedly with the tire, sets up to dismantling sealing connection between base and the epitheca for it is more convenient to assemble. Moreover, even when the inflating valve breaks down, the upper shell can be detached from the base for maintenance without replacement, so that the inflating valve can always ensure a better sealing effect, the service life is prolonged, and the cost is reduced.

In the above valve structure, the upper casing is cylindrical, the base comprises a block-shaped bottom plate and a cylindrical connecting cylinder, one end of the connecting cylinder is fixed on the bottom plate, the other end of the connecting cylinder extends into the upper casing and is in threaded connection with the upper casing, a sealing sleeve is sleeved outside the connecting cylinder, the inner wall of the sealing sleeve is attached to the outer wall of the connecting cylinder in a sealing mode, two ends of the sealing sleeve are attached to the bottom ends of the bottom plate and the upper casing in a sealing mode respectively, and the air outlet is formed in the bottom plate. Adopt threaded connection between epitheca and the base, it is comparatively convenient to assemble and maintain, and moreover, the setting of seal cover can guarantee again to have better sealed effect between base and the epitheca, avoids leaking gas.

In the valve structure, the inner wall of the bottom end of the upper shell is provided with an inwards concave annular concave shoulder, the connecting cylinder is in threaded connection with the inside of the annular concave shoulder, and the end part of the connecting cylinder is abutted against the bottom wall of the annular concave shoulder. The design of annular concave shoulder, the base is connected the back with the epitheca, and the tip of connecting cylinder supports and leans on the diapire of annular concave shoulder, can realize spacingly, prevents to rotate the head to avoid the seal cover by compression deformation, guarantee better sealed effect.

In foretell inflating valve structure, the valve inside is the inner wall of column and outer wall and epitheca and seals and paste and lean on, cross the gas passageway and include along the vertical section of valve inside axial extension and along the horizontal segment of valve inside radial extension, vertical section one end is the top that inlet end and this end run through the valve inside, the other end with the horizontal segment is linked together, the setting is staggered with the air inlet to the inlet end, the horizontal segment is close to the bottom setting of valve inside, the at least one end of horizontal segment runs through the outer wall of valve inside forms the aforesaid end of giving vent to anger, the connecting cylinder stretches into and has convex annular convex shoulder on the one end inner wall in the epitheca, annular convex shoulder with the inner wall of epitheca flushes, the valve inside bottom stretches into in the annular convex shoulder and paste with annular convex shoulder and paste and seal. Annular convex shoulder's design for form the shoulder hole in the connecting cylinder, then will expire the passageway design for vertical section and horizontal segment, in the beginning, under the effect of spring, the valve core supports and leans on the top at the epitheca, and the internal perisporium and the annular convex shoulder of periphery wall and epitheca paste sealedly, and the end of giving vent to anger of crossing gas passageway is sealed by the internal perisporium of annular convex shoulder or epitheca, has formed a department again sealedly, has further guaranteed sealed effect, be difficult for losing efficacy more. When the valve core is pressed downwards by external force, the valve core integrally moves downwards, the spring is compressed, the valve core and the top wall of the upper shell are separated, the air inlet is communicated with the air inlet end of the air passing channel, and the valve core moves downwards until the air outlet end is opposite to the inner wall of the larger inner diameter part of the stepped hole, so that the air outlet end is communicated with the air outlet, and the inflation and exhaust operations can be performed.

In foretell inflating valve structure, the top of epitheca has and is cylindric inflator pump, the internal diameter of inflator pump is less than the internal diameter of epitheca, the inner chamber of inflator pump forms above-mentioned air inlet, still be equipped with the sealing washer in the epitheca, the top of the sealed top of fixing at the epitheca of sealing washer, the top of valve inside has the ejector pin, the ejector pin slides and passes in the sealing washer stretches into the air inlet and the outer wall of ejector pin is sealed to paste with the inner wall of sealing washer and lean on, under the effect of spring the top of valve inside is sealed to be leaned on the lower extreme of sealing washer. Due to the arrangement of the sealing ring, the sealing path between the valve core and the air inlet is prolonged, and the sealing effect is better. And the valve core is pressed on the sealing ring under the action of the spring, and the stressed part of the sealing ring can be embedded into the air inlet end of the air passage, so that the sealing effect of the air passage is further improved.

In the above valve structure, the outer wall of the seal ring is sealed against the inner peripheral wall of the upper case. Through the arrangement, a double seal is formed between the air inlet and the air outlet, the possibility of failure is further reduced, and the sealing effect is ensured.

In the valve structure, the bottom end of the valve core is also provided with a convex guide post, the bottom plate is provided with a strip-shaped guide groove, the guide post is slidably arranged in the strip-shaped guide groove in a penetrating manner, and the spring is sleeved on the guide post. The cooperation structure of guide post and guide way can lead the slip of valve inside, further guarantees not to take place the incline, guarantees sealed effect.

In the inflating valve structure, the bottom plate is further provided with an annular positioning groove, the annular positioning groove surrounds the strip-shaped guide groove, one end of the spring abuts against the bottom end of the inflating valve core, and the other end of the spring is embedded into the annular positioning groove and abuts against the bottom wall of the annular positioning groove. The design of annular constant head tank can avoid the spring to take place the incline inefficacy to the tip clearance positioning of spring.

In the valve structure, one end of the sealing sleeve, which is abutted against the bottom plate, is provided with an annular blocking edge which protrudes outwards, and the end surface of the annular blocking edge is flush with the end surface of the sealing sleeve. Due to the design of the annular blocking edge, the sealing path is further prolonged, the deformation is reduced, and the sealing effect is guaranteed.

In the above valve structure, the bottom end of the upper casing has an annular convex edge protruding outwards, the end surface of the annular convex edge is flush with the end surface of the bottom end of the upper casing, and the annular concave shoulder is arranged on the inner wall of the upper casing with the annular convex edge. The design of the annular convex edge can ensure the strength requirement after the annular concave shoulder is arranged.

In the valve structure, the top end of the ejector rod is provided with an annular stop block protruding outwards, and the outer diameter of the annular stop block is larger than the inner diameter of the sealing ring. The design of annular dog has increased the area on top, is convenient for press, also can play spacing effect simultaneously.

Compared with the prior art, the inflating valve structure has the following advantages:

1. the valve core and the shell are simplified to form a matching structure, so that the influence of abrasion is eliminated, multiple seals are formed between the valve core and the shell, the probability of sealing failure is reduced, the sealing effect is improved, and the difficulty of manufacturing is reduced.

2. Set up to dismantling sealing connection between base and the epitheca for it is more convenient to assemble, moreover, even after the inflating valve breaks down, also can pull down the epitheca from the base, maintains, need not to change, makes it guarantee to have better sealed effect all the time, has prolonged life, the cost is reduced.

Drawings

Fig. 1 is a perspective view of the present valve structure.

Fig. 2 is a cross-sectional view of the present valve structure.

In the figure, 1, a housing; 1a, an upper shell; 1a1, air inlet; 1a2, annular concave shoulder; 1a3, inflator; 1a4, annular flange; 1b, a base; 1b1, air outlet; 1b2, bottom plate; 1b3, connecting cylinder; 1b4, annular shoulder; 1b5, strip guide groove; 1b6, annular positioning groove; 2. a valve core; 2a, a mandril; 2a1, annular stop; 2b, a gas passage; 2c, a guide post; 3. a spring; 4. sealing sleeves; 4a, an annular blocking edge; 5. and (5) sealing rings.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the present valve structure includes a spring 3, a valve core 2, and a cylindrical housing 1. The housing 1 comprises a base 1b and an upper shell 1a, wherein the top of the upper shell 1a is provided with an air inlet 1a1, the bottom of the upper shell 1a is detachably and hermetically connected with the base 1b, and the base 1b is provided with an air outlet 1b 1.

Specifically, the upper case 1a is cylindrical, the base 1b includes a block-shaped bottom plate 1b2 and a cylindrical connecting tube 1b3, and the air outlet 1b1 is opened in the bottom plate 1b 2. Connecting cylinder 1b3 one end is fixed on bottom plate 1b2, and the other end stretches into in the epitheca 1a and with epitheca 1a threaded connection for it is more convenient to assemble, moreover, even when the inflating valve breaks down the back, also can pull down epitheca 1a from base 1b, maintains, need not to change, has prolonged life, the cost is reduced. The inner wall of the bottom end of the upper casing 1a is provided with a concave annular shoulder 1a2, and the connecting cylinder 1b3 is screwed into the annular shoulder 1a2 and abuts against the bottom wall of the annular shoulder 1a2 at the end. The bottom end of the upper shell 1a has an outwardly protruding annular flange 1a4, the end surface of the annular flange 1a4 is flush with the end surface of the bottom end of the upper shell 1a, and an annular concave shoulder 1a2 opens at the inner wall of the upper shell 1a having the annular flange 1a 4.

Connecting cylinder 1b3 overcoat is equipped with seal cover 4, and the sealed subsides of inner wall of seal cover 4 lean on the outer wall of connecting cylinder 1b3, and the sealed subsides of both ends of seal cover 4 are sealed respectively and are leaned on the bottom of bottom plate 1b2 and upper casing 1a, can guarantee to have better sealed effect between base 1b and the upper casing 1a, avoids leaking gas. One end of the sealing sleeve 4 abutting against the bottom plate 1b2 is provided with an annular blocking edge 4a protruding outwards, and the end face of the annular blocking edge 4a is flush with the end face of the sealing sleeve 4.

The top of the upper shell 1a is provided with a cylindrical inflator 1a3, the inner diameter of the inflator 1a3 is smaller than that of the upper shell 1a, the inner cavity of the inflator 1a3 forms an air inlet 1a1, the valve core 2 is arranged in the shell 1 formed by the base 1b and the upper shell 1a in a sliding mode, the top end of the valve core 2 is provided with a mandril 2a, and the mandril 2a extends into the air inlet 1a 1. Valve inside 2 is column and outer wall and upper casing 1 a's inner wall seals to paste, it pastes to have seted up air passing channel 2b on the valve inside 2, air passing channel 2b includes along the vertical section of 2 axial extensions of valve inside and along the radial horizontal segment that extends of valve inside 2, vertical section one end is intake end and this end runs through the top of valve inside 2, the other end is linked together with the horizontal segment, intake end and air inlet 1a1 stagger the setting, the horizontal segment is close to the bottom setting of valve inside 2, the outer wall that the at least one end of horizontal segment runs through valve inside 2 forms the end of giving vent to anger, the end of giving vent to anger can communicate with gas outlet 1b1, connecting cylinder 1b3 has convex annular convex shoulder 1b4 on stretching into the one end inner wall in upper casing 1a, annular shoulder 1b4 with the inner wall of upper casing 1a flushes, valve inside 2 bottom stretches into annular shoulder 1b4 and pastes to paste with annular shoulder 1b4 and. In this embodiment, the two ends of the horizontal section both penetrate through the outer wall of the valve core 2 to form the air outlet end.

Still be equipped with sealing washer 5 in the epitheca 1a, the sealed top of fixing at epitheca 1a of the upper end of sealing washer 5, the outer wall of sealing washer 5 is sealed to be leaned on the internal perisporium of epitheca 1 a. The push rod 2a penetrates through the sealing ring 5 in a sliding mode and extends into the air inlet 1a1, the outer wall of the push rod 2a is in sealing contact with the inner wall of the sealing ring 5, the top end of the push rod 2a is provided with an annular stop block 2a1 protruding outwards, and the outer diameter of the annular stop block 2a1 is larger than the inner diameter of the sealing ring 5. The bottom end of the valve core 2 is also provided with a convex guide post 2c, a strip-shaped guide groove 1b5 is formed in the bottom plate 1b2, the guide post 2c is slidably arranged in the strip-shaped guide groove 1b5 in a penetrating mode, and the spring 3 is sleeved on the guide post 2 c. Annular constant head tank 1b6 has still been seted up on bottom plate 1b2, and annular constant head tank 1b6 encircles the setting of bar guide way 1b5, and spring 3 one end is supported and is leaned on the bottom of valve core 2, and the other end imbeds in annular constant head tank 1b6 and supports and lean on the diapire of annular constant head tank 1b 6. Under the action of the spring 3, the top end of the valve core 2 is in sealing support against the lower end of the sealing ring 5.

In the valve structure, the valve core 2 and the inner wall of the shell 1 can be directly matched through a single straight cylinder surface, so that the matching structure between the valve core 2 and the shell 1 is simplified, and the valve structure can not be deflected in the sliding process. Then, a through-air passage 2b is provided in the valve core 2, an intake end of the through-air passage 2b is provided at the top of the valve core 2 and the intake end is offset from the intake port 1a1, under the action of the spring 3, the valve core 2 is in sealing abutment against the sealing ring 5, the valve core 2 and the sealing ring 5 are matched to realize sealing of the air inlet 1a1, the sealing ring 5 also realizes sealing of the air inlet end of the air passing channel 2b, sealing is also realized between the outer peripheral wall of the valve core 2 and the inner peripheral wall of the shell 1, sealing is also realized between the air outlet end of the air passing channel 2b and the inner wall of the shell 1, namely sealing at four positions is realized, even if the relative sliding between the valve core 2 and the upper casing 1a is abraded, the sealing effect is not affected, or even if a certain part leaks air, a good sealing effect can be always kept.

When the top rod 2a of the valve core 2 is pressed downwards by external force, the top rod 2a pushes the valve core 2 to move downwards integrally, the spring 3 is compressed, the valve core 2 and the sealing ring 5 are separated, the air inlet 1a1 is communicated with the air outlet 1b1 through the air passage 2b, and inflation and exhaust operations can be carried out. After the completion, external force is cancelled, and under the elastic force action of the spring 3, the valve core 2 is reset and sealed to abut against the sealing ring 5 to realize sealing.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. An inflating valve structure comprises a spring (3), a valve core (2) and a cylindrical shell (1), the top end of the shell (1) is provided with an air inlet (1a1), the bottom end is provided with an air outlet (1b1), the valve core (2) is arranged in the shell (1) in a sliding way, it is characterized in that the outer peripheral wall of the valve core (2) is sealed with the inner wall of the shell (1), the valve core (2) is provided with an air passing channel (2b), the air inlet end of the air passing channel (2b) penetrates through the top end of the valve core (2) and is staggered with the air inlet (1a1), the air outlet end of the air passing channel (2b) can be communicated with the air outlet (1b1), two ends of the spring (3) are respectively propped against the shell (1) and the valve core (2), the valve core (2) is sealed and abutted against the top wall of the shell (1) under the action of a spring (3).

2. The valve structure according to claim 1, wherein the housing (1) comprises a base (1b) and an upper case (1a), the top of the upper case (1a) has the above air inlet (1a1), the bottom of the upper case (1a) and the base (1b) are detachably and sealingly connected, and the air outlet (1b1) is located on the base (1 b).

3. The valve structure according to claim 2, wherein the upper casing (1a) is cylindrical, the base (1b) comprises a block-shaped bottom plate (1b2) and a cylindrical connecting cylinder (1b3), one end of the connecting cylinder (1b3) is fixed on the bottom plate (1b2), the other end of the connecting cylinder extends into the upper casing (1a) and is in threaded connection with the upper casing (1a), a sealing sleeve (4) is sleeved outside the connecting cylinder (1b3), the inner wall of the sealing sleeve (4) is in sealing contact with the outer wall of the connecting cylinder (1b3), two ends of the sealing sleeve (4) are in sealing contact with the bottom ends of the bottom plate (1b2) and the upper casing (1a), and the air outlet (1) is formed in the bottom plate (1b 2).

4. A valve structure according to claim 3, wherein the bottom end inner wall of the upper case (1a) has a concave annular shoulder (1a2), the connecting cylinder (1b3) is screwed into the annular shoulder (1a2) and ends up against the bottom wall of the annular shoulder (1a 2).

5. The valve structure according to claim 3 or 4, wherein the valve core (2) is cylindrical and has an outer wall in sealing contact with the inner wall of the upper casing (1a), the air passage (2b) comprises a vertical section extending along the axial direction of the valve core (2) and a horizontal section extending along the radial direction of the valve core (2), the vertical section has an air inlet end at one end and penetrates through the top end of the valve core (2) and has another end communicated with the horizontal section, the air inlet end is staggered with the air inlet (1a1), the horizontal section is arranged near the bottom end of the valve core (2), at least one end of the horizontal section penetrates through the outer wall of the valve core (2) to form the air outlet end, the connecting cylinder (1b3) extends into the upper casing (1a) and has a raised annular shoulder (1b4) on the inner wall of the end, and the annular shoulder (1b4) is flush with the inner wall of the upper casing (1a), the bottom end of the valve core (2) extends into the annular shoulder (1b4) and seals against the annular shoulder (1b 4).

6. The valve structure according to claim 5, wherein the top of the upper case (1a) has an inflator (1a3) in a cylindrical shape, the inner diameter of the inflator (1a3) is smaller than that of the upper shell (1a), the inner cavity of the inflator (1a3) forms the air inlet (1a1), a sealing ring (5) is also arranged in the upper shell (1a), the upper end of the sealing ring (5) is fixed on the top of the upper shell (1a) in a sealing way, the top end of the valve core (2) is provided with a mandril (2a), the mandril (2a) penetrates through the sealing ring (5) in a sliding way and extends into the air inlet (1a1), the outer wall of the mandril (2a) is tightly attached to the inner wall of the sealing ring (5), the top end of the valve core (2) is in sealing support against the lower end of the sealing ring (5) under the action of the spring (3).

7. A valve arrangement according to claim 6, wherein the outer wall of the sealing ring (5) seals against the inner peripheral wall of the upper housing (1 a).

8. The valve structure according to claim 3 or 4, wherein the bottom end of the valve core (2) is further provided with a protruding guide post (2c), the bottom plate (1b2) is provided with a strip-shaped guide groove (1b5), the guide post (2c) is slidably arranged in the strip-shaped guide groove (1b5), and the spring (3) is sleeved on the guide post (2 c).

9. The valve structure according to claim 8, wherein the bottom plate (1b2) is further provided with an annular positioning groove (1b6), the annular positioning groove (1b6) is arranged around the strip-shaped guide groove (1b5), one end of the spring (3) abuts against the bottom end of the valve core (2), and the other end of the spring is embedded in the annular positioning groove (1b6) and abuts against the bottom wall of the annular positioning groove (1b 6).

10. A valve structure according to claim 3 or 4, characterized in that the end of the sealing sleeve (4) abutting against the bottom plate (1b2) is provided with an outwardly protruding annular stop edge (4a), the end surface of the annular stop edge (4a) being flush with the end surface of the sealing sleeve (4).