Quick-opening stop valve

Abstract

The utility model relates to the technical field of stop valves, in particular to a quick-opening stop valve. Comprising a valve body which is provided with a valve cavity and a valve port. The valve core assembly is arranged in the valve cavity; the valve element assembly comprises a static valve element and a movable valve element, and the static valve element is arranged at the position close to the valve port and covers the valve port in a sealing mode. The movable valve element abuts against the static valve element and can rotate relative to the static valve element. The valve rod is arranged in the valve cavity and connected with the movable valve element, and the valve rod can rotate around the axis of the valve rod so as to drive the movable valve element to rotate; the sealing cover is arranged outside the valve rod in a sleeving manner and blocks the valve cavity; the valve rod can rotate relative to the sealing cover, the anti-abrasion piece is arranged between the valve rod and the sealing cover, and the anti-abrasion piece is matched with the valve rod and the sealing cover in a sealing mode. According to the quick-opening stop valve, the valve rod and the sealing cover are not prone to abrasion.

Description

Technical Field

[0001] The present application relates to the technical field of globe valves, and in particular to a quick-opening globe valve. Background Art

[0002] Globe valves are widely used in the pipelines of air-conditioning systems to control the on-off of the pipelines. In order to solve the problems existing in traditional globe valves (the valve core moves axially through threads to open the valve port, with low efficiency and easy damage). There has emerged a globe valve with a static valve core and a dynamic valve core in existing globe valves. The static valve core and the dynamic valve core are in contact with each other, and the valve stem rotates to drive the dynamic valve core to rotate relative to the static valve core, so as to release the blockage of the opening on the static valve core by the dynamic valve core, thereby opening the globe valve. Under this structure, the valve core no longer needs to move axially through threads, solving the problems of low efficiency and easy damage.

[0003] However, under this structure, one end of the valve stem needs to tightly press against the static valve core, and the other end needs to tightly press against the cover on the top of the valve body. This makes the static valve core and the dynamic valve core always in contact with each other to ensure that the medium can only flow through the opening on the static valve core. And because the valve stem is in direct contact with the cover on the top of the valve body, there is a large frictional force between the valve stem and the cover during the rotation of the valve stem to drive the valve core to rotate. Prolonged use will cause wear of the valve stem or the cover, and then lead to a decrease in the pressure between the dynamic valve core and the static valve core, a deterioration of the contact effect between the two, and thus leakage. Summary of the Utility Model

[0004] Based on this, it is necessary to provide a quick-opening globe valve in which the valve stem and the cover are not easily worn.

[0005] A quick-opening globe valve, comprising:

[0006] A valve body, provided with a valve cavity and a valve port on the valve body;

[0007] A valve core assembly, arranged in the valve cavity; the valve core assembly includes a static valve core and a dynamic valve core. The static valve core is arranged near the valve port and seals the valve port; the dynamic valve core is in contact with the static valve core and can rotate relative to the static valve core; an opening is provided on the static valve core, and the opening has an open state and a closed state; when the dynamic valve core rotates to seal the opening on the static valve core, the opening is in the closed state;

[0008] A valve stem, arranged in the valve cavity and connected to the dynamic valve core, and the valve stem can rotate around its own axis to drive the dynamic valve core to rotate;

[0009] A cover, sleeved outside the valve stem and sealing the valve cavity;

[0010] A wear-resistant member, the valve stem can rotate relative to the gland, the wear-resistant member is arranged between the valve stem and the gland, and the wear-resistant member is in sealing cooperation with the valve stem and the gland respectively.

[0011] In one embodiment, along the height direction of the valve cavity, the valve stem includes a sealing section and a connecting section. The sealing section penetrates through the gland, one end of the connecting section is connected to the sealing section, and the other end is connected to the moving valve core; the connecting section has a top, the gland has a bottom, and the wear-resistant member is arranged between the top and the bottom.

[0012] In one embodiment, the wear-resistant member is a bearing member. Along the height direction of the valve cavity, the top surface of the bearing member abuts against the bottom of the gland, and the bottom surface of the bearing member abuts against the top of the connecting section.

[0013] In one embodiment, the valve stem further includes an external connection section, the external connection section is connected to the sealing section and at least partially extends outside the valve body. An operation part is arranged at one end of the external connection section, and the operation part is used for cooperating with an external tool for operation.

[0014] In one embodiment, the quick-opening stop valve further includes a limiting member, and the limiting member is arranged in the valve cavity; the limiting member is sleeved outside the connecting section and abuts against the inner wall of the valve cavity; at least one protruding part is arranged on the outer side of the limiting member, and a concave part matched with the protruding part is arranged on the inner part of the valve cavity.

[0015] In one embodiment, the quick-opening stop valve further includes a first sealing member, and the first sealing member is arranged between the static valve core and the valve port, and the first sealing member is in sealing cooperation with the static valve core and the valve port respectively; a first sealing part is arranged on the valve port, at least part of the first sealing member is embedded in the first sealing part, and the embedded part is in sealing cooperation with the first sealing part.

[0016] In one embodiment, along the height direction of the valve body, a convex block is arranged on the top of the gland, and the top surface of the convex block protrudes from the top surface of the valve body.

[0017] In one embodiment, a third sealing member is arranged between the sealing section and the gland; a first annular groove is formed on the outer side wall of the sealing section, the third sealing member is placed in the first annular groove, and both sides of the third sealing member are in sealing cooperation with the first annular groove and the gland respectively.

[0018] In one embodiment, the third sealing member is arranged as at least two, and a plurality of the third sealing members are distributed along the height direction of the sealing section.

[0019] In one embodiment, the static valve core is provided with an opening, and the opening has an open state and a closed state; when the dynamic valve core rotates to cover the opening on the static valve core, the opening is in the closed state; when the dynamic valve core rotates to avoid covering the opening on the static valve core, the opening is in the open state.

[0020] Compared with the prior art, by arranging an anti-wear part between the valve stem and the cover, the quick-opening stop valve effectively reduces the direct wear of the valve stem and the cover, avoids the situation that the pressure applied on the dynamic valve core and the static valve core decreases, keeps good abutment between the two all the time, is not easy to leak, and improves the service life of the stop valve.

[0021] Secondly, the stop valve is opened and closed by the relative rotation of the dynamic and static valve cores, which is different from the way that the valve core realizes axial movement through thread cooperation with the valve body. The opening and closing efficiency is higher, the torque requirement for the motor is low, the load of the motor is small, and the problem of thread slipping of the thread cooperation structure is also avoided. In addition, since the valve core assembly does not need to move axially up and down to open and close the valve, the overall height of the stop valve with a motor is reduced, saving space. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative work.

[0023] Figure 1 It is a schematic structural diagram of the quick-opening stop valve provided by the present application.

[0024] Figure 2 It is a three-dimensional schematic diagram of a part of the structure of the quick-opening stop valve provided by the present application.

[0025] Figure 3 It is a schematic structural diagram of the dynamic valve core provided by the present application.

[0026] Figure 4 It is a schematic structural diagram of the static valve core provided by the present application.

[0027] Reference numerals: 10, valve body; 11, valve cavity; 12, valve port; 20, spool assembly; 21, static spool; 211, opening; 212, first anti-rotation portion; 22, moving spool; 221, mating groove; 30, valve stem; 31, connecting section; 32, sealing section; 311, top; 33, external connection section; 331, operating portion; 40, cover; 401, bottom; 41, bump; 50, anti-wear part; 51, bearing part; 61, first seal; 62, first sealing portion; 621, groove; 71, third seal; 72, first annular groove; 81, fourth seal; 82, second annular groove; 90, limiting part; 91, protruding portion. Detailed implementation manners

[0028] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe in detail the specific implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0029] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of the present application are only for the purpose of illustration and do not represent the only implementation manner.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first feature is in direct contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0032] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0033] Please refer to Figures 1 to 4 , this application provides a quick-opening stop valve, which includes a valve body 10, a valve core assembly 20, a valve stem 30, a sealing cover 40 and an anti-wear member 50. The valve body 10 is provided with a valve cavity 11 and a valve port 12. The valve core assembly 20 is arranged in the valve cavity 11. The valve core assembly 20 includes a static valve core 21 and a dynamic valve core 22. The static valve core 21 is arranged near the valve port 12, and the sealing cover 40 seals the valve port 12. The dynamic valve core 22 abuts against the static valve core 21 and can rotate relative to the static valve core 21. The valve stem 30 is arranged in the valve cavity 11 and is connected to the dynamic valve core 22, and the valve stem 30 can rotate around its own axis to drive the dynamic valve core 22 to rotate. The sealing cover 40 is sleeved outside the valve stem 30 and seals the valve cavity 11. The valve stem 30 can rotate relative to the sealing cover 40, and the anti-wear member 50 is arranged between the valve stem 30 and the sealing cover 40, and the anti-wear member 50 is in sealing cooperation with the valve stem 30 and the sealing cover 40 respectively.

[0034] It can be understood that the valve stem 30 is arranged through the sealing cover 40 and can rotate relative to the sealing cover 40. The anti-wear member 50 is arranged between the two, eliminating the direct wear of the valve stem 30 and the sealing cover 40, avoiding the reduction of the pressure applied on the dynamic valve core 22 and the static valve core 21, keeping good abutment between the two all the time, not easy to leak, and improving the service life of the stop valve.

[0035] Furthermore, the valve stem 30 includes a sealing section 32 and a connecting section 31. The sealing section 32 is arranged through the sealing cover 40. One end of the connecting section 31 is connected to the sealing section 32, and the other end is connected to the dynamic valve core 22. Along the height direction of the valve cavity 11, the sealing section 32 is located above the connecting section 31. The connecting section 31 has a top 311, and the sealing cover 40 has a bottom 401. The anti-wear member 50 is arranged between the top 311 and the bottom 401. It can be understood that when installing, the sealing cover 40 needs to tightly press the valve stem 30, and pressure is applied to the dynamic valve core 22 and the static valve core 21 through the valve stem 30, so that the dynamic valve core 22 tightly presses the static valve core 21, and the static valve core 21 tightly presses the valve port 12, thereby ensuring a good sealing effect. That is, the sealing cover 40 abuts against the connecting section 31 of the valve stem 30 to tightly press the valve stem 30. And since the dynamic valve core 22 and the static valve core 21 are in a pressing and rotating fit for opening and closing, there will be both axial rotation and axial load between the connecting section 31 and the sealing cover 40.

[0036] In this application, the anti-wear member 50 is arranged between the connecting section 31 and the cover 40, bearing the axial rotation and axial load between the two, eliminating the direct wear between the two, avoiding the reduction of the pressure applied on the moving valve core 22 and the static valve core 21, keeping the two in good contact all the time, not easy to leak, and improving the service life of the stop valve.

[0037] Exemplarily, the anti-wear member 50 is a bearing member 51. The bearing member 51 can not only ensure smooth relative rotation between the valve stem 30 and the cover 40, but also avoid wear between the two. And the existence of the bearing member 51 makes the rotation between the valve stem 30 and the cover 40 smoother and more labor-saving, effectively reducing the torque of the valve stem 30 and the valve core rotation.

[0038] Further, along the height direction of the valve cavity 11, the top surface of the bearing member 51 is in sealing cooperation with the bottom of the cover 40, and the bottom surface of the bearing member 51 is in sealing cooperation with the top of the connecting section 31. In this embodiment, the sealing cooperation refers to abutting cooperation.

[0039] In this embodiment, the bearing member 51 is preferably a thrust ball bearing. An ordinary deep groove ball bearing is divided into an inner ring and an outer ring and can only bear the load in the diameter direction. A thrust bearing is divided into an upper ring and a lower ring. Compared with an ordinary deep groove ball bearing, it can better bear the axial load.

[0040] Further, the valve stem 30 further includes an external connection section 33. The external connection section 33 is connected to the sealing section 32 and at least partially extends out of the valve body 10. That is, along the height direction of the valve body 10, the valve stem 30 is divided into the upper external connection section 33, the middle sealing section 32, and the lower connecting section 31. And an operation part 331 is provided at one end of the external connection section 33, and the operation part 331 is used for cooperating with an external tool for operation.

[0041] In this embodiment, the upper part of the external connection section 33 passes through to the outside of the valve body 10 and the operation part 331 is arranged. The operation part 331 can be connected to an external driving part to drive the valve stem 30 to rotate through the driving part.

[0042] Exemplarily, the driving part can be selected as a handle and a motor, that is, there are two options of manual driving and motor driving. In this embodiment, a motor is preferably selected, which is more labor-saving. The connection method between the operation part 331 and the motor can be selected by itself and will not be elaborated.

[0043] As a preference, the external connection section 33, the sealing section 32, and the connecting section 31 are of an integral structure, making the structure of the valve stem 30 more stable and the processing more convenient.

[0044] In one embodiment, the quick-opening stop valve further includes a limiting member 90. The limiting member 90 is disposed in the valve cavity 11, sleeved outside the connecting section 31, and abuts against the inner wall of the valve cavity 11. The position of the valve stem 30 is limited by the limiting member 90. Even if wear occurs at the anti-wear member 50, the limiting member 90 can further limit the pressing of the valve stem 30 against the static valve core 21, thereby improving the service life.

[0045] Further, at least one protruding portion 91 is provided on the outer side of the limiting member 90, and a concave portion matching the protruding portion 91 is provided inside the valve cavity 11. After the protruding portion 91 is snapped into the concave portion, the limiting member 90 cannot rotate relative to the valve cavity 11.

[0046] Of course, not limited thereto, a protruding portion 91 may also be provided inside the valve cavity 11 to abut against the protruding portion 91 on the limiting member 90 to limit the rotation of the limiting member 90. The protruding portions 91 on the outer side of the limiting member 90 may also be provided in plurality, and the concave portions or protruding portions 91 inside the valve cavity 11 may also be provided in plurality, which can be specifically selected according to actual needs.

[0047] Exemplarily, the limiting member 90 may be integrally formed with the valve stem 30 or separately formed with the valve body 10. In this embodiment, it is preferably separately formed and has a sheet structure. The material of the limiting member 90 may be selected from wear-resistant materials such as ceramics, which is not limited herein.

[0048] In one embodiment, the quick-opening stop valve further includes a first seal 61. The first seal 61 is disposed between the static valve core 21 and the valve port 12, and the first seal 61 is in sealing cooperation with the static valve core 21 and the valve port 12 respectively.

[0049] It can be understood that the static valve core 21 abuts against the valve port 12, and good sealing cooperation is required to avoid leakage between the two. By adding the first seal 61, the sealing effect between the static valve core 21 and the valve port 12 is enhanced, further avoiding the possibility of leakage between the two, and improving the sealing performance and pressure resistance of the stop valve.

[0050] Further, a first sealing portion 62 is provided on the valve port 12, and the side of the first seal 61 close to the valve port 12 is in sealing cooperation with the first sealing portion 62. Adding the first sealing portion 62 further enhances the sealing effect between the static valve core 21 and the valve port 12.

[0051] Further, at least a part of the first seal 61 is embedded in the first sealing portion 62, and the embedded part is in sealing cooperation with the first sealing portion 62.

[0052] It can be understood that the embedding method not only realizes sealing but also limits the first seal 61, effectively avoiding the displacement of the first seal 61 under high pressure and further reducing the possibility of leakage.

[0053] Exemplarily, the first seal 61 can be a rubber ring, an O-ring, etc. The specific selection can be made according to actual needs.

[0054] Exemplarily, the first sealing portion 62 can be provided with structures such as a groove 621, a protrusion, etc. Preferably, it is provided as a circle of grooves 621 provided at the valve port 12, and the first seal 61 is embedded in the circle of grooves 621 to achieve all-round sealing and limiting.

[0055] Further, a third seal 71 is provided between the sealing section 32 and the cover 40. A first annular groove 72 is formed on the outer side wall of the sealing section 32, and the third seal 71 is placed in the first annular groove 72. Both sides of the third seal 71 are in sealing cooperation with the first annular groove 72 and the cover 40 respectively.

[0056] Exemplarily, the number of the first annular grooves 72 can be set to one or more, and the number of the third seals 71 corresponds to the number of the sealing grooves. In this embodiment, it is preferably set to two, which can not only ensure good sealing but also avoid excessive costs.

[0057] Exemplarily, the third seal 71 can be a rubber ring, an O-ring, etc. The specific selection can be made according to actual needs.

[0058] Further, the valve cavity 11 is opened along the length direction of the valve body 10. The upper part of the valve cavity 11 is not closed, and a valve port 12 is provided at the lower part. The cover 40 is connected to the upper part of the valve cavity 11 to block the valve cavity 11.

[0059] Specifically, the connection mode between the cover 40 and the valve cavity 11 can be screwed or welded. Preferably, it is screwed, which is more convenient for later disassembly and maintenance.

[0060] Further, a fourth seal 81 is provided between the cover 40 and the valve cavity 11. A second annular groove 82 is provided at a position near the upper part of the cover 40, and the fourth seal 81 is placed in the second annular groove 82. Both sides of the fourth seal 81 are in sealing cooperation with the second annular groove 82 and the inner wall of the valve cavity 11 respectively.

[0061] Exemplarily, the fourth seal 81 can be a rubber ring, an O-ring, etc. The specific selection can be made according to actual needs.

[0062] Further, along the height direction of the valve body 10, a convex block 41 is provided on the top of the cover 40, and the top surface of the convex block 41 protrudes from the top surface of the valve body 10. When the external connection section 33 is connected to the driving member, the driving member will apply pressure to the cover 40 through the convex block 41, and then the cover 40 will apply pressure to the valve stem 30, and the valve stem 30 will apply pressure to the valve core to ensure good crimping of the valve core and avoid the possibility of leakage.

[0063] For example, the number of the protrusions 41 is set to two and they are symmetrically arranged, so that the applied pressure is more stable. Figure 2 , Figure 3 A matching groove 221 is provided on the movable valve core 22, and the connecting portion of the valve stem 30 can be inserted into the matching groove 221 and engaged with the matching groove 221 to limit the position, so that the rotation of the valve stem 30 can drive the movable valve core 22 to rotate.

[0064] In this embodiment, the movable valve core 22 is provided with two matching grooves 221 at intervals along the circumferential direction, and the number of connecting sections 31 of the valve stem 30 is also two, so as to achieve a more stable clamping rotation between the two.

[0065] See also Figure 2 , Figure 4 A first anti-rotation portion 212 is provided on the outer circumference of the static valve core 21, and a second anti-rotation portion is provided on the inner wall of the valve cavity 11. The first anti-rotation portion 212 and the second anti-rotation portion cooperate to prevent rotation, so that the static valve core 21 cannot rotate relative to the valve cavity 11.

[0066] Exemplarily, the first anti-rotation portion 212 can be set as a protrusion or a recess, and the second anti-rotation portion can also be set as a protrusion or a recess. As long as the two can cooperate with each other to engage or contact each other, anti-rotation cooperation can be achieved.

[0067] Of course, the number of the first anti-rotation part 212 and the second anti-rotation part can be set to one or more, which can be selected according to actual needs.

[0068] Furthermore, the static valve core 21 is provided with an opening 211, and the opening 211 has an open state and a closed state. When the movable valve core 22 rotates to avoid the opening 211 on the static valve core 21 of the cover 40, the opening 211 is in the open state; when the movable valve core 22 rotates to the opening 211 on the static valve core 21 of the cover 40, the opening 211 is in the closed state.

[0069] Furthermore, the number of openings 211 can be set to one or more. Preferably, it is set to two, and the two openings 211 are rotationally symmetrical about the center of the static valve core 21. The flow area is effectively increased, and the flow efficiency of the stop valve is increased. And because the moving valve core 22 blocks the opening 211 by rotating the valve stem 30, the opening 211 is set to be rotationally symmetrical about the center of the static valve core 21, so that the moving valve core 22 can easily block the opening 211 by rotating.

[0070] Preferably, the opening 211 is configured to be fan-shaped, and the portion of the movable valve core 22 that blocks the opening 211 is also configured to be fan-shaped.

[0071] It can be understood that the fan-shaped opening 211 is more suitable for the circular static valve core 21, and the flow area of the opening 211 can be increased as much as possible under the same size limit.

[0072] Of course, the opening 211 can also be circular, triangular, rectangular, etc., as long as it can be covered and blocked by the passive valve core 22, and it is not limited to the above-mentioned fan-shaped embodiment.

[0073] Furthermore, at least part of the outer peripheral side of the static valve core 21 is circular, and the outer peripheral side of the static valve core 21 is circumferentially abutted against the inner wall of the valve cavity 11. At least part of the outer peripheral side of the moving valve core 22 is circular, and the static valve core 21 and the moving valve core 22 are coaxially arranged. Since the outer peripheral side of the static valve core 21 is circumferentially abutted against the inner wall of the valve cavity 11, the connection between the static valve core 21 and the valve cavity 11 is tighter, ensuring that the medium can only pass through the opening 211. And because the moving valve core 22 and the static valve core 21 are coaxially arranged, the adaptability between the moving valve core 22 and the static valve core 21 is better, reducing interference.

[0074] In this embodiment, both the static valve core 21 and the moving valve core 22 are made of ceramic materials. The ceramic materials have high hardness and are not easy to deform, the surface is smooth, and the friction is small, so that the moving valve core 22 can be rotated relative to the static valve core 21 with a very small torque to close the opening 211.

[0075] Of course, in other embodiments, the static valve core 21 and the moving valve core 22 can also be made of other materials, such as brass, to reduce costs, and brass has good sealing effect due to its lower hardness.

[0076] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0077] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A quick-opening stop valve, characterized in that, The quick-opening stop valve includes: A valve body (10), within which a valve chamber (11) and a valve port (12) are provided; A valve core assembly (20), disposed within the valve chamber (11); the valve core assembly (20) includes a stationary valve core (21) and a movable valve core (22), the stationary valve core (21) is disposed near the valve port (12); the movable valve core (22) abuts against the stationary valve core (21) and is capable of rotating relative to the stationary valve core (21); A valve stem (30), the valve stem (30) is disposed within the valve chamber (11) and is connected to the movable valve core (22), the valve stem (30) can rotate about its own axis to drive the movable valve core (22) to rotate; A sealing cover (40), the sealing cover (40) is sleeved outside the valve stem (30) and seals the valve chamber (11); An anti-wear member (50), the valve stem (30) can rotate relative to the sealing cover (40), the anti-wear member (50) is disposed between the valve stem (30) and the sealing cover (40), and the anti-wear member (50) abuts against the valve stem (30) and the sealing cover (40) respectively.

2. The quick-opening stop valve according to claim 1, characterized in that, Along the height direction of the valve chamber (11), the valve stem (30) includes a sealing section (32) and a connecting section (31), the sealing section (32) passes through the sealing cover (40), one end of the connecting section (31) is connected to the sealing section (32), and the other end is connected to the movable valve core (22); the connecting section (31) has a top (311), the sealing cover (40) has a bottom (401), and the anti-wear member (50) is disposed between the top (311) and the bottom (401).

3. The quick-opening stop valve according to claim 2, characterized in that, The anti-wear member (50) is a bearing member (51), along the height direction of the valve chamber (11), the top surface of the bearing member (51) abuts against the bottom of the sealing cover (40), and the bottom surface of the bearing member (51) abuts against the top of the connecting section (31).

4. The quick-opening stop valve according to claim 2, wherein, The valve stem (30) further includes an external connection section (33), the external connection section (33) is connected to the sealing section (32) and at least partially extends outside the valve body (10), one end of the external connection section (33) is provided with an operation part (331), and the operation part (331) is used to cooperate with an external tool for operation.

5. The quick-opening stop valve according to any one of claims 2-4, characterized in that The quick-opening stop valve further includes a limiting member (90), the limiting member (90) is disposed within the valve chamber (11); the limiting member (90) is sleeved outside the connecting section (31) and abuts against the inner wall of the valve chamber (11); at least one protruding part (91) is provided on the outer side of the limiting member (90), and a concave part matching the protruding part (91) is provided on the inner part of the valve chamber (11).

6. The quick-opening stop valve according to any one of claims 1-4, characterized in that, The quick-opening stop valve further includes a first seal (61) disposed between the static valve core (21) and the valve port (12), and the first seal (61) is in sealing fit with the static valve core (21) and the valve port (12) respectively; a first sealing portion (62) is provided on the valve port (12), and at least a part of the first seal (61) is embedded in the first sealing portion (62), and the embedded part is in sealing fit with the first sealing portion (62).

7. The quick-opening stop valve according to claim 1, wherein, Along the height direction of the valve body (10), a convex block (41) is provided on the top of the cover (40), and the top surface of the convex block (41) protrudes from the top surface of the valve body (10).

8. The quick-opening stop valve according to claim 2, characterized in that, A third seal (71) is provided between the sealing section (32) and the cover (40); a first annular groove (72) formed by inward depression is provided on the outer side wall of the sealing section (32), the third seal (71) is placed in the first annular groove (72), and the third seal (71) is in sealing fit with the first annular groove (72) and the cover (40).

9. The quick-opening stop valve according to claim 8, wherein, The third seals (71) are provided as at least two, and the plurality of third seals (71) are distributed along the height direction of the sealing section (32).

10. The quick-opening stop valve according to claim 1, characterized in that, An opening (211) is provided on the static valve core (21), and the opening (211) has an open state and a closed state; when the moving valve core (22) rotates to the opening (211) on the static valve core (21) of the cover (40), the opening (211) is in the closed state; when the moving valve core (22) rotates to avoid the opening (211) on the static valve core (21) of the cover (40), the opening (211) is in the open state.

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