Ball valve

Abstract

A ball valve comprising a valve body (10), a valve seat (20) and a valve stem (30), the valve seat (20) being attached to the valve body (10), one end of the valve stem (30) being rotatably attached within the valve body (10), and the other end of the valve stem (30) passing through the valve seat (20) and projecting from the valve body (10), a limiting protrusion ring (31) being provided at a portion of the valve stem (30) which passes through the valve seat (20), a protrusion (21) being provided at one end of the valve seat (20) remote from the valve body (10), and an end of the protrusion (21) facing the valve body (10) abutting against the limiting protrusion ring (31) to restrict the valve stem (30) from coming off the valve body (10).

Description

[Technical field]

[0001] Related Applications This application claims priority to a Chinese patent application filed on January 26, 2022, bearing application number 202220260076.8 and titled "Ball Valve", the entire contents of which are incorporated herein by reference.

[0002] FIELD OF THE DISCLOSURE This application relates to the technical field of flow control, and more particularly to ball valves. [Background technology]

[0003] A ball valve is a valve in which an opening and closing member (sphere) is moved by a valve stem and rotates about the axis of the ball valve.

[0004] The valve stem of the ball valve is specifically restricted within the valve body by a valve seat attached to the valve body, and prevents the valve stem from being pushed out of the valve body by the action of the medium when the ball valve is operated. At present, the valve stem restriction structure of the ball valve in the related art is usually provided at the portion where the valve stem penetrates the valve seat, specifically, the restriction of the valve stem is realized by the abutment of the restriction structure and the valve seat.

[0005] The ball valve of the above structure requires that the outer diameter of the limiting structure of the valve stem is larger than the inner diameter of the valve seat, which means that the outer diameter of the blank for manufacturing the valve stem must also reach the inner diameter of the valve seat, and then the blank must be machined by turning to manufacture the valve stem. This not only requires a lot of material to be used, which increases material costs, but also increases the length of the section that needs to be machined, resulting in high processing costs. Summary of the Invention

[0006] According to various embodiments of the present application, a ball valve is provided to solve the above technical problems.

[0007] A ball valve includes a valve body, a valve seat, and a valve stem, the valve seat being attached to the valve body, one end of the valve stem being rotatably attached within the valve body, and the other end of the valve stem passing through the valve seat and protruding from the valve body, a limiting protrusion ring being provided at the portion of the valve stem which penetrates the valve seat, and a protrusion being provided at one end of the valve seat away from the valve body, the end of the protrusion facing the valve body abutting the limiting protrusion ring to restrict the valve stem from coming off the valve body.

[0008]

[0023] With the rational structural design of the limiting protrusion ring and the protrusions described above, the restriction of the valve stem within the valve body is specifically achieved by the abutment of the protrusions provided in the valve seat against the limiting protrusion ring, which not only reduces the overall dimensions of the valve stem and facilitates the production of the valve stem, but also reduces the dimensions of the blanks required for the production of the valve stem, thereby reducing material and reducing costs. At the same time, it can be seen that the provision of a protrusion for restricting the valve stem inside the valve seat reduces the dimensions and reduces the production costs of the valve seat.

[0009] In one embodiment, the projections abuttingly engage the limiting projection ring by surface to surface contact.

[0010] It can be understood that the protrusion achieves a pressing limit against the limiting protrusion ring by surface-to-surface contact, thereby increasing the contact area when the protrusion and the limiting protrusion ring abut and engage, and further that the protrusion plays a role in improving the stability with which the limiting protrusion ring restricts the valve stem within the valve body.

[0011] In one embodiment, the protrusion is a ring structure.

[0012] It can be seen that by making the protrusion have a circular ring structure, the structure of the protrusion can be specifically set, and the contact area between the protrusion and the limiting protrusion ring can be further increased.

[0013] In one embodiment, the thickness of the protrusion along the axial direction of the valve seat is 3 mm or more.

[0014] It can be seen that the above thickness setting of the protrusion ensures the structural strength of the protrusion and further meets the usage requirements of the restriction of the protrusion against the valve stem within the valve body.

[0015] In one embodiment, the limiting protrusion ring is molded integrally with the valve stem. In some embodiments, the protrusion is molded integrally with the valve seat.

[0016] It can be seen that by integrally molding the limiting protrusion ring and the valve stem, the production and manufacture of the valve stem is facilitated, and by integrally molding the protrusion and the valve seat, the production and manufacture of the valve seat is facilitated.

[0017] In one embodiment, a sealing ring is fitted to the limiting protrusion ring, and the valve stem can be assembled and sealed to the valve seat by the sealing ring.

[0018] It can be seen that providing the sealing ring on the limiting protrusion ring serves to facilitate the production and manufacture of the valve stem and to simplify the machining process of the valve stem.

[0019] In one embodiment, the valve seat is provided with a limiting member against which the valve stem can abuttingly engage such that the maximum angle through which the valve stem can rotate within the valve seat is 90°.

[0020] It can be seen that the rational structural design of the above-mentioned limiting member, on the basis that the ball valve satisfies the limit on the rotation angle of the valve stem, serves to simplify the structure, reduce the processing difficulty, facilitate installation, and even reduce the production cost of the ball valve.

[0021] In one embodiment, the valve stem may abuttingly engage the restrictor member by surface-to-surface contact.

[0022] It can be seen that the surface-to-surface contact and engagement between the valve stem and the limiting member improves the stability of the abutting engagement between the valve stem and the limiting member, ensures that the maximum angle of the valve stem within the valve seat is 90°, and plays a role in improving the operational stability of the ball valve on the basis of meeting the usage requirements of the ball valve.

[0023] In one embodiment, the restricting member is provided on an inner peripheral wall of the protrusion.

[0024] It can be seen that by providing the restricting member on the inner peripheral wall of the protrusion, the structural setting of the restricting member within the valve seat can be specifically realized.

[0025] In one embodiment, the end face of the restrictor member facing the valve body abuts against the limiting protruding ring, or a predetermined gap is left between the end face of the restrictor member facing the valve body and the limiting protruding ring.

[0026] It can be understood that, according to the rational structure of the above-mentioned limiting member, different embodiments in which the limiting member is provided on the protrusion can be specifically realized.

[0027] The details of one or more embodiments of the application are set forth in the drawings and description below. Other features, objects, and advantages of the application will become apparent from the description, drawings, and claims. [Brief description of the drawings]

[0028] To better describe and explain the embodiments and / or examples of the inventions disclosed herein, reference may be made to one or more drawings, in which additional details or examples used to explain the drawings should not be considered as limiting the scope of any of the disclosed inventions, the embodiments and / or examples described herein, and the best mode of these inventions as understood herein.

[0029] [Figure 1] 1 is a cross-sectional view of a ball valve provided by one embodiment of the present application. FIG. [Diagram 2]FIG. 2 is a bottom view of the valve seat in the present application. [Diagram 3] FIG. 2 is a cross-sectional view of a valve seat in the present application. [Figure 4] FIG. 2 is a schematic diagram of a valve stem according to the present application.

[0030] 10 valve body, 20 valve seat, 21 protrusion, 211 inner peripheral wall, 212 stepped surface, 22 limiting member, 30 valve stem, 31 limiting protrusion ring, 101 sealing ring. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] Hereinafter, the technical aspects of the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, but it is clear that the described embodiments are only some of the embodiments of the present application, and are not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts belong to the protection scope of the present application.

[0032] It should be explained that when an element is "disposed on" another element, it may be disposed directly on the other element, or there may be intervening elements. When an element is considered to be "disposed on" another element, it may be disposed directly on the other element, or there may be intervening elements. When an element is considered to be "fixed to" another element, it may be fixed directly to the other element, or there may be intervening elements.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are merely intended to describe specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0034] 1 to 4, a ball valve provided by one embodiment of the present application includes a valve body 10, a valve seat 20 and a valve stem 30.

[0035] The valve seat 20 is attached to the valve body 10, one end of the valve stem 30 is rotatably attached within the valve body 10, and the other end of the valve stem 30 protrudes from the valve body 10 through the valve seat 20, so that when the ball valve is operated, the valve stem 30 can be driven to rotate within the valve body 10 to fulfill the valve opening and closing operations for the ball valve. It should be noted that a sphere (not shown) is connected to a portion of the valve stem 30 provided within the valve body 10, so that the valve stem 30 can move the sphere together and rotate within the valve body 10 to realize the valve opening and closing operations for the ball valve. It should be noted that the valve seat 20 may be integrally formed with the valve body 10, or may be connected and attached to the valve body 10 by welding or the like.

[0036] In the present application, a limiting protrusion ring 31 is provided at the portion of the valve stem 30 which penetrates the valve seat 20, and a protrusion 21 is provided at one end of the valve seat 20 away from the valve body 10, and the end of the protrusion 21 facing the valve body 10 abuts against the limiting protrusion ring 31 to restrict the valve stem 30 from coming off the valve body 10.

[0037] The restriction of the valve stem 30 within the valve body 10 in the ball valve of the present application is specifically realized by the abutment of the protrusion 21 provided in the valve seat 20 against the limiting protrusion ring 31, which not only reduces the overall size of the valve stem 30 and facilitates the production of the valve stem 30, but also reduces the size of the blank required for the production of the valve stem 30, thereby reducing material and reducing costs. At the same time, it can be understood that by providing the protrusion 21 for restricting the valve stem 30 inside the valve seat 20, the size of the structure can be reduced, and the production cost of the valve seat 20 can be reduced.

[0038] The protrusion 21 abuts and engages with the limiting protrusion ring 31 through surface-to-surface contact, thereby specifically realizing the abutting engagement between the protrusion 21 and the limiting protrusion ring 31 and increasing the contact area when the protrusion 21 and the limiting protrusion ring 31 abut and engage, and further improving the stability with which the protrusion 21 restricts the valve stem 30 within the valve body 10 by the limiting protrusion ring 31.

[0039] Specifically, the protrusion 21 of the present application is a circular ring structure, which specifically realizes the structural setting of the protrusion 21 and further increases the contact area between the protrusion 21 and the limiting protrusion ring 31. It should be noted that the protrusion 21 is not limited to what is shown in the figures, and it goes without saying that those skilled in the art can make the protrusion 21 a circular arc structure or other suitable feasible structural forms, and detailed description is omitted here.

[0040] Next, the thickness of the protrusion 21 along the axial direction of the valve seat 20 is set to 3 mm or more, thereby ensuring the structural strength of the protrusion 21 and further meeting the limiting usage requirements of the protrusion 21 against the valve stem 30; that is, the pressure that the protrusion 21 can withstand when pressing and restricting the limiting protrusion ring 31 must be greater than the design pressure of the valve stem 30 in the ball valve; and the parameter design can ensure that the valve seat meets the strength requirements of the ball valve and meet the usage requirements of the ball valve.

[0041] In the present application, the limiting protrusion ring 31 is molded integrally with the valve stem 30. In some embodiments, the protrusion 21 is molded integrally with the valve seat 20 to facilitate the production and manufacturing of the valve stem 30 and / or the valve seat 20. It goes without saying that the limiting protrusion ring 31 and the valve stem 30, and the protrusion 21 and the valve seat 20 may be connected and fixed by welding or other connection methods, and detailed description thereof will be omitted here.

[0042] A sealing ring 101 is fitted to the limiting protruding ring 31 of the present application, and the valve stem 30 can be assembled and sealed to the valve seat 20 by the sealing ring 101. That is, in the ball valve of the present application, the sealing ring 101, which assembles and seals the valve stem 30 and the valve seat 20, is integrated into the limiting protruding ring 31, so that during the production process of the limiting protruding ring 31, the restriction of the valve stem 30 in the valve body 10 and the structure of assembling and sealing the valve stem 30 and the valve seat 20 can be integrated into the limiting protruding ring 31, which plays a role of facilitating the production and manufacturing of the valve stem 30 and simplifying the processing process of the valve stem 30.

[0043] In addition, the valve seat 20 of the present application is provided with a limiting member 22, and the valve stem 30 can abut and engage with the limiting member 22 so that the maximum angle at which the valve stem 30 rotates within the valve seat 20 is 90°. This simplifies the structure, reduces the difficulty of processing, facilitates installation, and further reduces the production cost of the ball valve, based on the fact that the ball valve satisfies the limit on the rotation angle of the valve stem 30.

[0044] The valve stem 30 can abut and engage with the limiting member 22 through surface-to-surface contact, thereby improving the stability of the abutting engagement between the valve stem 30 and the limiting member 22, ensuring that the maximum angle of the valve stem 30 in the valve seat 20 is 90°, and playing a role in improving the working stability of the ball valve on the basis of meeting the requirements for use of the ball valve. It should be noted that the limiting member 22 has two perpendicular abutting surfaces, and the valve stem 30 can abut against the two abutting surfaces of the limiting member 22 respectively in the initial position or the position after rotating 90°, thereby realizing that the maximum angle of the valve stem 30 when rotating in the valve seat 20 by the limiting member 22 is 90°.

[0045] In the present application, the restricting member 22 of the present application is provided on the inner peripheral wall 211 of the protrusion 21, thereby specifically realizing the structural setting of the restricting member 22 within the valve seat 20; specifically, by molding the restricting member 22 integrally with the protrusion 21, this serves to facilitate the production and manufacturing of the valve seat 20 and reduce costs.

[0046] The end face of the limiting member 22 of the present application facing the valve body 10 abuts against the limiting protruding ring 31, or a predetermined gap is left between the end face of the limiting member 22 facing the valve body 10 and the limiting protruding ring 31. That is, the end face of the limiting member 22 facing the valve body 10 may be on the same plane as the step surface 212 of the protrusion 21 for restricting the limiting protruding ring 31, or may be provided independently, thereby specifically realizing different embodiments in which the limiting member 22 is provided on the protrusion 21.

[0047] The technical features of the above embodiments can be combined in any combination, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, but as long as there is no contradiction in the combination of these technical features, all of them should be considered within the scope described in this specification.

[0048] The above examples merely show some embodiments of the present application, and although the description is relatively specific and detailed, it should not be understood as limiting the scope of the claims of the present application. It should be noted that those skilled in the art can make some modifications and improvements without departing from the spirit of the present application, all of which are within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the scope of the attached claims.

Claims

1. A ball valve including a valve body, a valve seat, and a valve stem, the valve seat being attached to the valve body, one end of the valve stem being rotatably attached within the valve body, and the other end of the valve stem protruding from the valve body through the valve seat, A limiting protrusion ring is provided at a portion of the valve stem that penetrates the valve seat, A protrusion is provided at one end of the valve seat away from the valve body, A ball valve, wherein an end of the protrusion facing the valve body abuts against the limiting protrusion ring to restrict removal of the valve stem from the valve body.

2. 2. The ball valve of claim 1, wherein said projections abuttingly engage said limit projection ring by face-to-face contact.

3. The ball valve according to claim 2 , wherein the protrusion has a circular ring structure.

4. 2. The ball valve according to claim 1, wherein a thickness of the protrusion along an axial direction of the valve seat is 3 mm or more.

5. The ball valve of claim 1 , wherein the limiting protrusion ring is integrally molded with the valve stem.

6. The ball valve according to claim 1 , wherein the protrusion is integrally molded with the valve seat.

7. A sealing ring is fitted to the limiting protrusion ring; The ball valve of claim 1 , wherein the valve stem is sealably assembled to the valve seat by the sealing ring.

8. The valve seat is provided with a restricting member, 2. The ball valve of claim 1, wherein the valve stem is capable of abuttingly engaging the limiting member such that the maximum angle through which the valve stem can rotate within the valve seat is 90 degrees.

9. 9. The ball valve of claim 8, wherein the valve stem is abuttingly engageable with the restrictor member by surface-to-surface contact.

10. The ball valve according to claim 8 , wherein the restricting member is provided on an inner peripheral wall of the protrusion.

11. The ball valve according to claim 10, wherein an end surface of the restricting member facing the valve body abuts against the restricting protruding ring.

12. 11. The ball valve according to claim 10, wherein a predetermined gap is left between the end face of the restricting member facing the valve body and the restricting protruding ring.

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