Valve rod and valve element flexible connecting structure and valve

Abstract

The utility model provides a valve rod and valve element flexible connecting structure and a valve.The valve rod and valve element flexible connecting structure comprises a valve rod, a valve element and a floating connecting piece, specifically, the valve rod comprises a connecting section and a main body section, the connecting section is arranged at one end of the main body section, the connecting section and the main body section are coaxially arranged and are in transition through a first spherical surface, and the radial size of the connecting section is smaller than that of the main body section; an inner hole is coaxially formed in the valve element in a penetrating mode along the axis of the valve element. A second spherical surface is arranged at the end, located in the inner hole, of the valve element. The connecting section of the valve rod penetrates through the inner hole and then is connected with the valve element through a floating connecting piece, and the connecting section is in clearance fit with the inner wall of the inner hole. The second spherical surface abuts against the first spherical surface and can slide relative to the first spherical surface, so that floating connection between the valve rod and the valve element is kept. The valve element is automatically aligned under the thrust action of the executing mechanism, so that the influence of the gap T on the sealing performance of the valve is eliminated, and the sealing stability of the valve is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of valves, and further relates to a valve rod and valve core flexible connection structure and a valve. BACKGROUND

[0002] As an important accessory for controlling medium flow on an industrial pipeline, a valve mainly drives a valve core to move through a valve rod to realize opening and closing of the valve.

[0003] In the related art, a valve seals by pressing a rubber part of a valve seat through a cutting edge on a valve core. At present, due to gravity, machining errors and other reasons, the sealing surface of the valve core of the valve on the market often deviates relative to the valve seat, so that in the sealing operation, the cutting edge on one side of the valve core just contacts the valve seat, and a gap T is randomly generated between the cutting edge on the other side and the valve seat, thereby making the corresponding valve need a larger sealing force and compression amount to realize sealing, and the sealing performance of the valve is unstable and there is a risk of leakage. In view of this, the inventors believe that developing a valve rod and valve core connection structure capable of eliminating the influence of the gap T on the sealing performance of the valve will have a profound impact on the development of the valve industry. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the application is to provide a valve rod and valve core flexible connection structure and a valve, which automatically performs alignment under the thrust action of an actuator, thereby eliminating the influence of the gap T on the sealing performance of the valve, improving the sealing stability of the valve and reducing the risk of leakage.

[0005] The technical scheme provided by the application is as follows:

[0006] In one aspect, the application provides a valve rod and valve core flexible connection structure, comprising:

[0007] A valve rod comprising a connecting section and a main body section, the connecting section being arranged at one end of the main body section, the two being coaxially arranged and being connected through a first spherical surface, and the radial dimension of the connecting section being smaller than that of the main body section;

[0008] A valve core having an inner hole coaxially and penetratingly arranged along its own axis, the valve core being provided with a second spherical surface at one end of the inner hole;

[0009] A floating connecting piece, the connecting section of the valve rod being connected with the valve core through the floating connecting piece after penetrating the inner hole, and the connecting section and the inner wall of the inner hole being gap-fitted, so that the second spherical surface abuts against the first spherical surface and can slide relative to the first spherical surface, thereby keeping the valve rod and the valve core in floating connection.

[0010] By the valve stem valve core flexible connection structure provided in the application, after the valve core sleeve is arranged on the valve stem, the connecting section has a certain gap with the inner hole of the valve core, and the ball surface of the valve core and the ball surface of the valve stem are matched by the corresponding second ball surface and the first ball surface, so that the valve core has a certain degree of freedom, and can rotate at a small angle around the ball center relative to the valve stem under the thrust of the actuator, so as to automatically align when there is a certain offset between the valve core sealing surface and the valve seat sealing surface, that is, when the gap T is generated, the automatic centering of the valve core sealing surface and the valve seat sealing surface is realized, and the stable sealing of the valve is ensured. In this way, the probability of the valve core offsetting relative to the valve seat and causing the valve to leak due to gravity, machining errors and the like is reduced, the valve achieves good sealing effect, and the yield of the valve is improved, which is beneficial to maintaining the image of the enterprise.

[0011] In some embodiments, the floating connector comprises a locking nut and an elastic member;

[0012] The locking nut is arranged on the connecting section and located at one end of the valve core away from the main body section;

[0013] The elastic member is arranged between the valve core and the locking nut and abuts against the corresponding end faces of the valve core and the locking nut respectively, so as to ensure that the first ball surface and the second ball surface abut and can slide relative to each other.

[0014] In some embodiments, the elastic member comprises a spring.

[0015] By the valve stem valve core flexible connection structure provided in the application, the floating arrangement of the valve core on the valve stem is realized by the locking nut and the spring, the floating connection method is simple, at the same time, it is helpful to reduce the requirement for the production and assembly precision of the valve, the production and assembly are convenient, and it is helpful to promote the cost reduction and benefit increase of the enterprise.

[0016] In some embodiments, a spring cover is coaxially arranged on the connecting section;

[0017] The spring is arranged in the spring cover and slides along the inner wall of the spring cover in the axial direction of the spring;

[0018] One end of the spring cover away from the valve core abuts against the locking nut.

[0019] By the valve stem valve core flexible connection structure provided in the application, the spring cover is arranged to cover the spring, which on the one hand helps to stabilize the spring and further ensure the stability of the valve function, and on the other hand helps to reduce the probability that the particles, dust, moisture and the like in the external environment affect the normal extension and contraction of the spring, and further improves the sealing stability of the valve.

[0020] In some embodiments, a positioning table is formed on the connecting section;

[0021] The locking nut abuts against the positioning table after being screwed to the connecting section.

[0022] The positioning table is used for positioning the installation position of the locking nut, so as to ensure that the valve stem and the valve core are normally flexibly connected when the locking nut is screwed to the position, and help to ensure the assembly precision of the corresponding valve, reduce the assembly difficulty, and improve the use convenience.

[0023] In another aspect, the application also provides a valve, which comprises the valve stem and valve core flexible connection structure described above, and further comprises:

[0024] The valve body and the valve seat are fixedly installed in the valve body;

[0025] The outer edge of the end of the valve core close to the valve seat extends in the axial direction and forms a blade edge; the end of the valve seat close to the valve core is coaxially and fixedly provided with a rubber pad; the valve stem drives the valve core to reciprocally slide along the axial line of the valve stem in the valve body;

[0026] In the first state, the blade edge abuts against the rubber pad, and the valve is closed;

[0027] In the first state, the blade edge and the rubber pad keep a preset distance, and the valve is opened.

[0028] The valve provided by the application is provided with a blade edge, which helps to prolong the pressing amount of the valve core relative to the rubber pad of the valve seat, so as to further improve the sealing stability of the valve.

[0029] In some embodiments, the end of the valve core close to the second spherical surface extends in the axial direction and has a supporting section, the supporting section is coaxially arranged with the valve core, and the outer circular surfaces of the two are flush;

[0030] The supporting section slides and cooperates with the inner wall of the valve body along the axial line of the supporting section.

[0031] The valve provided by the application is provided with a supporting section, which is used for improving the convenience of the valve core when being assembled into the valve seat, reducing the probability that the valve core is swung or stuck relative to the valve body in the assembly operation; at the same time, the supporting section also plays a guiding role in the full stroke action of the valve core, which helps to ensure the stability and reliability of the structure and function of the valve.

[0032] In some embodiments, the supporting section is in a circular tube structure and is integrally formed with the valve core.

[0033] The valve provided by the application is provided with a hollow structure of the supporting section, so as to reduce the weight of the valve core, reduce the probability that the sealing surface of the valve core is deviated relative to the sealing surface of the valve seat due to gravity, effectively improve the yield of the valve, and further improve the reliability of the function of the valve; at the same time, it is also helpful to reduce the material cost required for producing the valve, and promote the energy saving and cost reduction of enterprises.

[0034] In some embodiments, the valve core is provided with a through hole axially through the valve core, the through hole is parallel to the inner hole and communicates with the support section.

[0035] The valve provided by the application has the through hole in the valve core, which helps to balance the pressure on both sides of the valve core, reduces the situation that the valve cannot be stably sealed due to excessive pressure on the sealing surface of the valve core, and effectively prolongs the service life of the valve. Meanwhile, the through hole in the valve core also facilitates the staff to hold the valve core and assemble the corresponding valve, which helps to reduce the production difficulty of the corresponding valve.

[0036] In some embodiments, the valve seat is coaxially provided with a mounting groove at one end close to the valve core, and the axial section of the mounting groove is T-shaped.

[0037] The rubber pad is fixedly embedded in the mounting groove in a shape matching the mounting groove.

[0038] The valve provided by the application installs the rubber pad by means of the T-shaped groove structure, which helps to improve the stability of the valve seat structure.

[0039] Compared with the prior art, the valve rod and valve core flexible connection structure and the valve provided by the application have at least one of the following beneficial effects:

[0040] 1. The application, by setting the valve core and the valve rod in spherical surface cooperation, and cooperating with the floating connecting piece, keeps the valve core with a certain degree of rotational freedom, so that the valve core can rotate at a small angle relative to the valve rod under the thrust of the actuator, to realize the automatic alignment of the valve core sealing surface relative to the valve seat sealing surface, effectively reduce the influence of gravity, machining error, etc. on the valve sealing performance, effectively eliminate the influence of the valve core offset amount, i.e. the gap T, on the valve sealing effect, thereby significantly improving the use performance of the valve and reducing the leakage probability.

[0041] 2. The application, by means of the spring cooperating with the locking nut to realize the floating connection of the valve core relative to the valve rod, and by means of the positioning table limiting the locking nut, the compression amount of the spring is controllable when the locking nut connects the valve core and the valve rod, effectively reducing the production difficulty of the valve rod and valve core flexible connection structure. The valve rod and valve core flexible connection structure is simple in whole, convenient to produce and assemble, and beneficial to energy saving and cost reduction of enterprises. BRIEF DESCRIPTION OF DRAWINGS

[0042] The above characteristics, technical features, advantages and implementation modes of the present application will be further described in the following preferred embodiments in a clear and easy-to-understand manner, combined with the accompanying drawings.

[0043] Figure 1is a sectional view of the overall arrangement of the flexible connection structure of the valve stem and the valve core, which is mainly embodied in the embodiment of the present application;

[0044] Figure 2 is Figure 1 is an enlarged view of part A in the figure, which is mainly used to embody the cooperation mode of the valve core and the valve stem;

[0045] Figure 3 is an exploded view of the valve core and the valve stem, which is mainly embodied in the embodiment of the present application;

[0046] Figure 4 is a sectional view of the overall structure of the valve core, which is mainly embodied in the embodiment of the present application;

[0047] Figure 5 is a partial enlarged view of the arrangement of the cutting edge and the rubber pad, which is mainly embodied in the embodiment of the present application.

[0048] Explanation of reference signs:

[0049] 1, valve stem; 11, connecting section; 12, main body section; 13, first spherical surface; 14, positioning table surface; 2, valve core; 21, body; 211, inner hole; 212, second spherical surface; 213, cutting edge; 214, through hole; 22, supporting section; 3, floating connecting piece; 31, locking nut; 32, elastic piece; 4, spring cover; 5, valve seat; 51, mounting groove; 6, rubber pad. DETAILED DESCRIPTION

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the specific embodiments of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other embodiments can also be obtained.

[0051] In order to make the drawing simple, only the parts related to the present application are shown in the drawings, which do not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the parts with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one".

[0052] It is known that as an important accessory for controlling medium flow on industrial pipelines, the valve mainly drives the valve core to move through the valve stem to realize the opening and closing of the valve. In the related art, the blade on the valve core presses the rubber part of the valve seat to realize sealing. At present, due to gravity, machining error and other reasons, the valve core sealing surface of the valve in the industry is often offset by a certain amount T relative to the valve seat sealing surface, that is, the blade on one side of the valve core contacts the rubber of the valve seat, and a gap T is randomly generated between the blade on the other side and the valve seat, so that the corresponding valve needs a larger sealing force and compression to realize sealing, the sealing performance is unstable, and there is a risk of leakage.

[0053] To this end, in one embodiment, referring to the drawings of the specification Figures 1 to 5 , a valve stem and valve core flexible connection structure is provided, which automatically aligns the valve core under the action of the thrust of the actuator to eliminate the influence of the offset T of the valve core relative to the valve seat on the sealing performance of the valve, and realizes reliable sealing of the valve. It comprises a valve stem 1, a valve core 2 and a floating connecting piece 3. The valve stem 1 comprises a connecting section 11 and a main body section 12, the connecting section 11 is arranged at one end of the main body section 12, both are coaxially arranged and are connected through a first spherical surface 13, and the radial dimension of the connecting section 11 is smaller than that of the main body section 12. The valve core 2 is coaxially penetrated along its own axis and has an inner hole 211, and a second spherical surface 212 is arranged at one end of the inner hole 211. After assembly, the connecting section 11 of the valve stem 1 penetrates the inner hole 211 and is detachably connected with the valve core 2 through the floating connecting piece 3, and the connecting section 11 and the inner wall of the inner hole 211 are gap fitted to make the second spherical surface 212 abut against the first spherical surface 13 and be slidable relative to the first spherical surface 13, so as to keep the valve stem 1 and the valve core 2 floatingly connected.

[0054] In actual application, since the valve core 2 and the valve stem 1 are connected through the spherical surface, and there is a certain gap between the inner wall of the inner hole 211 and the connecting section 11, the valve core 2 has a certain degree of rotation and / or oscillation freedom, and the floating connecting piece 3 is arranged to make the valve core 2 rotate at a small angle relative to the valve stem 1 under the action of the thrust of the actuator, so as to realize the automatic alignment of the sealing surface of the valve core 2 relative to the sealing surface of the valve seat 5, effectively eliminate the influence of the offset T of the valve core 2 relative to the valve seat 5 on the sealing function of the valve, reduce the influence of gravity, machining error and other factors on the sealing performance of the valve, and reduce the risk of leakage of the valve. At the same time, the production difficulty and cost of the corresponding valve are significantly reduced, thereby improving the yield of the valve and benefiting the energy saving and efficiency improvement of the enterprise.

[0055] In one embodiment, based on the above embodiment, specifically. Referring to Figures 1 to 3, the connecting section 11 is provided with external threads; in this embodiment of the present application, the floating connecting piece 3 comprises a locking nut 31 and an elastic piece 32; specifically, the locking nut 31 is screwed on the connecting section 11 and located at one end of the valve core 2 away from the main body section 12, so as to limit the valve core 2 from being pulled out of the valve rod 1; the elastic piece 32 is arranged between the valve core 2 and the locking nut 31 and abuts against the corresponding end faces of the valve core 2 and the locking nut 31 respectively, so as to ensure that the first spherical surface 13 and the second spherical surface 212 can be in abutment and relative sliding at the same time. Moreover, the arrangement of the elastic piece 32 enables the locking nut 31 to have a locking effect, effectively reducing the probability of the locking nut 31 being pulled out of the valve rod 1 in the axial direction and improving the stability of the valve rod-valve core flexible connection structure.

[0056] In this embodiment of the present application, in order to facilitate the assembly of the valve core 2 and the valve rod 1, refer to Figure 3 , the connecting section 11 is coaxially provided with a positioning platform 14, specifically, the radial dimension of the positioning platform 14 is greater than the radial dimension of one end of the connecting section 11 away from the main body section 12; during assembly, the locking nut 31 is screwed onto the connecting section 11 from one end of the connecting section 11 away from the main body section 12 until abutting against the positioning platform 14. The positioning platform 14 is used to assist the locking nut 31 to control the compression amount of the elastic piece 32, effectively improving the assembly accuracy of the valve rod-valve core flexible connection structure; at the same time, the positioning structure is simple and convenient to produce, which is helpful to further promote the enterprises to reduce costs and increase efficiency.

[0057] In this embodiment of the present application, the elastic piece 32 comprises a spring; during assembly, the valve core 2, the spring and the locking nut 31 are coaxially arranged at one end of the connecting section 11 away from the main body section 12 in sequence, and the locking nut 31 is screwed until it abuts against the positioning platform 14, so that the first spherical surface 13 and the second spherical surface 212 are in abutment and relative sliding rotation, that is, the assembly of the valve rod 1 and the valve core 2 is completed. In the embodiments of the present application, the elastic piece 32 can also be provided in other forms such as a spring washer, a flexible rubber pad 6, etc., which will not be listed one by one here; of course, the specific arrangement form of the elastic piece 32 should not be regarded as a limitation on the protection scope of the present application. This embodiment of the present application only takes the elastic piece 32 being provided as a spring as an example for illustration.

[0058] Refer to Figure 3 , in order to further improve the stability of the valve function, in this embodiment of the present application, the connecting section 11 is also coaxially provided with a spring cover 4; after assembly, the spring is arranged in the spring cover 4 and slides along the inner wall of the spring cover 4 in the axial direction of the spring, and one end of the spring cover 4 away from the valve core 2 abuts against one end of the locking nut 31 close to the positioning platform 14, so as to improve the installation stability of the spring, reduce the probability of the spring being invalid due to external dust, moisture, etc., and effectively ensure the stable operation of the valve.

[0059] Next, taking the valve rod-valve core flexible connection structure applied to a valve as an example, the technical solutions of the present application are further discussed. Specifically, refer toFigures 1 to 5 In one embodiment, a valve is provided, comprising the flexible connection structure of the valve stem and the valve core as described in any of the above embodiments, and further comprising a valve body and a valve seat 5. Specifically, the valve seat 5 is fixedly installed in the valve body; the outer edge of the valve core 2 near the valve seat 5 extends along the axis of the valve core 2 to the side of the valve seat 5 and forms a cutting edge 213; the side of the valve seat 5 near the valve core 2 is coaxially provided with a rubber pad 6; during operation, the valve stem 1 drives the valve core 2 to reciprocate along the axis of the valve stem 1 in the valve body; when the valve stem 1 drives the valve core 2 to slide along the axis of the valve stem 1 to the side of the valve seat 5, until the cutting edge 213 of the valve core 2 abuts against the rubber pad 6 of the valve seat 5, the valve is closed, which is the first state; when the valve stem 1 drives the valve core 2 to slide along the axis of the valve stem 1 away from the valve seat 5, until the cutting edge 213 of the valve core 2 is kept at a predetermined distance from the rubber pad 6 of the valve seat 5, the valve is closed, which is the second state.

[0060] In this embodiment of the present application, with reference to Figure 5 , the end of the valve seat 5 near the valve core 2 is coaxially provided with a T-shaped installation groove 51, and the rubber pad 6 is fixedly embedded in the installation groove 51 to improve its stability on the valve seat 5.

[0061] With reference to Figure 4 , in this embodiment of the present application, the valve core 2 extends along the axis of the valve core 2 away from the valve seat 5 and forms a support section 22, that is, the valve core 2 comprises a body 21 and the support section 22, the support section 22 is coaxially arranged with the body 21, and the outer circumferential surfaces of the two are flush and smoothly connected; during operation, the support section 22 is slidably connected with the inner wall of the valve body along the axis of the support section 22, which on the one hand guides the full stroke of the valve core 2 to improve the stability and reliability of the valve operation, and on the other hand improves the convenience of assembling the valve core 2 to the valve body and reduces the probability of the valve core 2 being stuck relative to the valve body during assembly and adjustment.

[0062] Meanwhile, in this embodiment of the present application, the support section 22 is in the form of a circular tube, that is, the support section 22 is hollow to reduce the weight of the valve core 2, thereby reducing the probability of the sealing surface of the valve core 2 being offset relative to the sealing surface of the valve seat 5 due to excessive weight, which helps to improve the yield of the valve; at the same time, it also effectively reduces the material cost required for producing the valve, which is beneficial to energy saving and cost reduction of enterprises.

[0063] Furthermore, the valve core 2 is provided with a through hole 214 penetrating along the axis of the valve core 2, the through hole 214 is parallel to the inner hole 211 and located in the middle of the valve core 2, that is, the through hole 214 is in communication with the support section 22; on the one hand, it is used to balance the pressure on both sides of the valve core 2 to reduce the probability of the valve being unable to be stably sealed due to excessive pressure on the sealing surface of the valve core 2 and prolong the service life thereof; on the other hand, it is used to facilitate the operator to hold the valve core 2 to perform corresponding operations, thereby reducing the production difficulty of the corresponding valve.

[0064] And, in this embodiment of the present application, the number of through holes 214 can be 1, 2, 3, …, etc. In the embodiments of the present application, the number of through holes 214 is not specifically limited, and can satisfy the above functions.

[0065] The implementation principle of the embodiment of the present application is: by setting the spherical surface cooperation between the valve core 2 and the valve stem 1, and keeping a certain gap between the connecting section 11 and the inner hole 211 of the valve core 2, and by setting the spring and the locking nut 31, the valve core 2 has a certain degree of rotational freedom, so that the valve core 2 can rotate at a small angle relative to the valve stem 1 under the thrust of the actuator, to realize the automatic alignment of the sealing surface of the valve core 2 relative to the sealing surface of the valve seat 5, effectively reduce the influence of gravity, machining error, etc. on the sealing performance of the valve, effectively eliminate the influence of the valve core 2 offset amount, i.e. the gap T, on the sealing effect of the valve, thereby significantly improving the use performance of the valve and reducing the leakage probability. In addition, the connection mode of the valve stem 1 and the valve core 2 is simple, and the production and assembly precision requirements are not high, effectively reducing the production difficulty and saving the production cost of the enterprise.

[0066] It should be noted that the above embodiments can be freely combined as needed. The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A flexible connection structure of a valve stem spool, characterized by, The valve stem comprises a connecting section and a main section, the connecting section is arranged at one end of the main section, both are coaxially arranged and are connected through a first spherical surface, and the radial dimension of the connecting section is smaller than that of the main section. The valve core is coaxially provided with an inner hole along its own axis, and a second spherical surface is arranged at one end of the valve core. The connecting section of the valve stem is connected with the valve core through the floating connecting piece after penetrating the inner hole, and the connecting section and the inner wall of the inner hole are gap-fitted to make the second spherical surface abut against the first spherical surface and slide relative to the first spherical surface to keep the valve stem and the valve core floating connection.

2. The flexible connection structure of the valve stem and the valve core according to claim 1, wherein the floating connecting piece comprises a locking nut and an elastic piece; the locking nut is arranged on the connecting section and located at one end of the valve core away from the main section; and the elastic piece is arranged between the valve core and the locking nut and abuts against the corresponding end face of the valve core and the locking nut respectively to ensure that the first spherical surface and the second spherical surface abut and slide relative to each other.

3. The flexible connection structure of the valve stem and the valve core according to claim 2, wherein the elastic piece comprises a spring.

4. The flexible connection structure of the valve stem and the valve core according to claim 3, wherein a spring cover is coaxially arranged on the connecting section; the spring is arranged in the spring cover and is in sliding fit with the inner wall of the spring cover along its own axial direction; and one end of the spring cover away from the valve core abuts against the locking nut.

5. The flexible connection structure of the valve stem and the valve core according to any one of claims 2-4, wherein a positioning platform is formed on the connecting section; and the locking nut abuts against the positioning platform after being screwed to the connecting section. The flexible connection structure of the valve stem and the valve core according to any one of claims 1-5 further comprises a valve body and a valve seat, the valve seat is fixedly installed in the valve body; the outer edge of one end of the valve core close to the valve seat extends in the axial direction and forms a blade edge; a rubber pad is coaxially and fixedly arranged on one end of the valve seat close to the valve core; and the valve stem drives the valve core to reciprocally slide in the valve body along its own axis. In the first state, the blade edge abuts against the rubber pad, and the valve is closed; and in the second state, the blade edge and the rubber pad keep a predetermined distance, and the valve is opened.

7. The valve according to claim 6, wherein one end of the valve core close to the second spherical surface extends in the axial direction and has a supporting section, the supporting section is coaxially arranged with the valve core, and the outer circular faces of the supporting section and the valve core are flush; and the supporting section is in sliding fit with the inner wall of the valve body along its own axis.

8. The valve according to claim 7, wherein the supporting section has a circular tube structure and is integrally formed with the valve core.

9. The valve according to claim 7 or 8, wherein the valve core is provided with a through hole penetrating in the axial direction, the through hole is parallel to the inner hole and communicates with the supporting section.

10. The valve according to any one of claims 6-8, wherein ​ ​ ​ ​ 6. A valve characterized by ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The valve seat is coaxially provided with a mounting groove at one end close to the valve core, and the axial section of the mounting groove is T-shaped. The rubber pad is fixedly embedded in the mounting groove in a shape adapting manner.

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