Spherical stop valve with good sealing effect

Abstract

The utility model provides a spherical stop valve with a good sealing effect. The spherical stop valve aims at solving the problem that a traditional spherical stop valve is poor in sealing performance under the high-pressure, high-temperature and corrosive fluid environment. The valve comprises a valve body, a connecting piece and a sealing piece, wherein the sealing piece is the core of the design. A plurality of annular protrusions are arranged on the outer side of the sealing piece and matched with the cavity in the inner side of the through hole and the flow guide cavity, fluid pressure is used for extruding the cavity to deform, the pressure intensity of the flow guide cavity is increased, and therefore the annular protrusions are ejected outwards, and tighter sealing is achieved. The sealing element is made of a high-performance material, has excellent high temperature resistance, cold resistance, aging resistance and corrosion resistance, and ensures stable work in a severe environment. In addition, the two ends of the sealing piece are firmly connected with the valve structure through interference clamping, and the sealing effect is further enhanced through the design of a pressure equalizing groove. The spherical stop valve not only improves sealing performance and durability, but also is convenient to maintain and replace, provides an efficient and reliable solution for industrial fluid control, and is suitable for various high-pressure, high-temperature and corrosive fluid environments.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a spherical stop valve with good sealing effect. Background Art

[0002] Valves are essential components in industrial production and fluid control systems. Ball globe valves are widely used due to their simple structure, easy operation, and excellent sealing performance. However, the sealing performance of traditional ball globe valves can be severely compromised over time, particularly in high-pressure, high-temperature, or corrosive fluid environments. Common sealing issues include seal surface wear, seal aging, and seal failure caused by fluid pressure. These issues not only reduce valve efficiency but can also lead to fluid leakage, posing a threat to the environment and production safety.

[0003] Traditional seal designs often rely on the elasticity and hardness of the material to provide sealing force. However, under high pressure and high temperature environments, the material's properties change, resulting in a decrease in sealing effectiveness. Furthermore, the structural design of traditional seals is often relatively simple, failing to fully utilize fluid pressure to enhance the sealing effect, making valves prone to leakage under the action of high-pressure fluids.

[0004] Therefore, there is an urgent need for a new type of spherical stop valve whose seal can adapt to high pressure, high temperature and corrosive fluid environment and has better sealing performance and longer service life. Utility Model Content

[0005] (1) Technical issues to be resolved

[0006] In order to solve the above problems, the utility model proposes a spherical stop valve with good sealing effect, which aims to solve the problem that traditional sealing designs in the existing technology often rely on the elasticity and hardness of the material to provide sealing force, but under high pressure and high temperature environments, the performance of the material will change, resulting in a decrease in sealing effect.

[0007] (2) Technical solution

[0008] The utility model discloses a spherical stop valve with good sealing effect, comprising:

[0009] a valve body having an inlet and at least one outlet;

[0010] A connecting piece is detachably provided at the outlet, the connecting piece comprising a base, a head, and a connecting portion connecting the base and the head, and the connecting piece is further provided with a through hole connected to the outlet;

[0011] a sealing member, disposed at one end of the through hole, and located on one side of the seat body, with one end of the sealing member connected to the through hole and the other end connected to the outlet;

[0012] The sealing member is provided with a first connecting portion and a second connecting portion at both ends thereof, and at least two annular protrusions are provided on the outer side of the sealing member. After the connecting member and the valve body are assembled, the annular protrusions abut against the inner sidewalls of the outlet and the through hole respectively.

[0013] A first groove cooperating with the first connecting part is provided on the inner wall of the outlet, and the first connecting part is interference fit in the first groove. A second groove cooperating with the second connecting part is provided in the through hole, and the second connecting part is interference fit in the second groove. When the fluid passes through the through hole, the pressure of the fluid can squeeze the annular protrusion outward.

[0014] In the present invention, the number of the annular protrusions is four, and the annular protrusions are located in pairs in the outlet and in the through hole respectively;

[0015] The heights of the two annular protrusions located in the outlet gradually decrease along a side close to the first connecting portion;

[0016] The heights of the two annular protrusions located in the through hole gradually decrease along a side close to the second connecting portion.

[0017] In the present invention, a pressure equalizing groove is further provided on the inner side of the seal, and the pressure equalizing groove is arranged corresponding to the annular protrusion, for increasing the outward pressure of the fluid on the annular protrusion when the fluid passes through the through hole.

[0018] In the present invention, the first groove and the second groove are both annular grooves, and the first connecting portion and the second connecting portion are annular protrusions.

[0019] In the present invention, the cross section of the annular protrusion is an isosceles trapezoid.

[0020] In the present invention, the material of the sealing element is one or more combinations of silicone rubber, fluororubber, polyurethane, and EPDM rubber.

[0021] In the present invention, a cavity is further provided on the inner side wall of the seal, and the cavity is located below the annular protrusion. A guide cavity corresponding to the annular protrusion is also provided on the cavity. When the fluid passes through the seal, pressure is generated to squeeze the cavity to deform, thereby increasing the pressure at the guide cavity to push the annular protrusion outward.

[0022] (3) Beneficial effects

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] (1) In the present invention, multiple annular protrusions are provided on the outer side of the seal, and a cavity and a guide cavity are provided on the inner side wall of the through hole, so that the fluid pressure can squeeze the cavity and increase the pressure in the guide cavity, thereby pushing the annular protrusion outward and further enhancing the sealing effect. This design fully utilizes the fluid pressure, allowing the seal to automatically adjust its sealing state under the action of high-pressure fluid, thereby improving the sealing performance of the valve.

[0025] (2) The seals in this utility model are made of high-performance materials such as silicone rubber, fluororubber, polyurethane, and EPDM. These materials have excellent resistance to high temperatures, cold, aging, oxidation, radiation, and electrical insulation, and also have good acid, alkali, and corrosion resistance. Therefore, the seals in this utility model can maintain stable performance in harsh working environments, extending the service life of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a schematic diagram of the overall structure of the spherical stop valve;

[0028] Figure 2 This is a schematic diagram of the explosion structure of a spherical stop valve;

[0029] Figure 3 Schematic diagram of the three-dimensional structure of the connecting piece;

[0030] Figure 4 Schematic diagram of the three-dimensional structure of the seal;

[0031] Figure 5 Schematic diagram of the cross-sectional structure of the seal;

[0032] Figure 6 This is a schematic diagram of the cross-sectional structure of the sealing component in Example 2.

[0033] 1. Valve body, 11. Inlet, 12. Outlet, 121. First groove, 2. Connecting piece, 21. Seat, 22. Head, 23. Connecting part, 24. Through hole, 241. Second groove, 242. Cavity, 243. Diversion cavity, 3. Sealing piece, 31. First connecting part, 32. Second connecting part, 33. Annular protrusion, 34. Pressure equalizing groove, 4. Valve core assembly. DETAILED DESCRIPTION

[0034] Compared to the embodiments shown in the drawings, feasible embodiments within the scope of protection of the present disclosure may have fewer components, additional components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0035] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meanings understood by persons of ordinary skill in the art to which this invention belongs. The terms "first," "second," and similar expressions used in the specification and claims of this utility model patent application do not denote any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "a" or "an" do not necessarily indicate a quantitative limitation. Terms such as "include," "comprising," or "having" mean that the element or object preceding the term encompasses the elements or objects listed after the term, and their equivalents, without excluding other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections or communications as shown in the accompanying drawings, but may include equivalent connections or communications, whether direct or indirect. Terms such as "upper," "lower," "left," "right," "horizontal," and "vertical" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] Example 1

[0038] like Figure 1-Figure 5 As shown, a spherical stop valve with good sealing effect includes a valve body 1, a connector 2, a seal 3 and four valve core components 4, wherein the valve core components 4 are arranged on the valve body 1 to control the on and off of both ends of the valve body 1.

[0039] In this embodiment, the valve body 1 has one inlet 11 and three outlets 12, and the valve core components are respectively located at the inlet 11 and the outlet 12. In this embodiment, the valve body 1 is designed with one inlet 11 and two outlets 12 to meet different fluid control requirements.

[0040] The connector 2 is detachably mounted at the outlet 12. The connector 2 includes a base 21, a head 22, and a connecting portion 23 connecting the base 21 and the head 22. The connector 2 is further provided with a through hole 24 connected to the outlet 12.

[0041] The sealing member 3 is provided at one end of the through hole 24 and is located at one side of the seat body 21. One end of the sealing member 3 is connected to the through hole 24, and the other end is connected to the outlet 12.

[0042] The sealing member 3 has a first connecting portion 31 and a second connecting portion 32 at each end. The outer portion of the sealing member 3 is provided with at least two annular protrusions 33. In this embodiment, there are four annular protrusions 33, two of which are located within the outlet 12 and the other two within the through-hole 24. When the connecting member 2 is assembled with the valve body 1, the annular protrusions 33 abut against the inner sidewalls of the outlet 12 and the through-hole 24, respectively, forming an effective seal.

[0043] Furthermore, the height of the two annular protrusions 33 located within the outlet 12 gradually decreases along the side close to the first connection portion 31, and the height of the two annular protrusions 33 located within the through hole 24 gradually decreases along the side close to the second connection portion 32. This design allows the seal 3 to be squeezed outward more evenly when subjected to fluid pressure, thereby improving the sealing effect.

[0044] The inner wall of the outlet 12 is provided with a first groove 121 that mates with the first connecting portion 31. The first connecting portion 31 is interference fit within the first groove 121. The through hole 24 is provided with a second groove 241 that mates with the second connecting portion 32. The second connecting portion 32 is interference fit within the second groove 241. This interference fit design allows the seal 3 to be securely installed between the outlet 12 and the through hole 24, preventing fluid leakage.

[0045] The inner side of the seal 3 is further provided with a pressure equalizing groove 34, which is arranged corresponding to the annular protrusion 33. When the fluid passes through the through hole 24, the pressure equalizing groove 34 can increase the outward pressure of the fluid on the annular protrusion 33, further improving the sealing effect.

[0046] In this embodiment, the first groove 121 and the second groove 241 are both annular grooves, and the first connecting portion 31 and the second connecting portion 32 are annular protrusions. The cross-section of the annular protrusion 33 is an isosceles trapezoid. This design allows the annular protrusion 33 to more evenly distribute the pressure when subjected to fluid pressure, thereby improving the sealing effect.

[0047] The material of the seal 3 is one or more of silicone rubber, fluororubber, polyurethane, and EPDM rubber. In this embodiment, silicone rubber is selected as the material of the seal 3 because it has excellent high temperature resistance, cold resistance, aging resistance, oxidation resistance, radiation resistance, and electrical insulation properties, as well as good acid and alkali resistance and corrosion resistance.

[0048] Example 2

[0049] like Figure 6 As shown, based on Example 1, the inner wall of the seal 3 further comprises a cavity 242, which is located below the annular protrusion 33. A flow guide cavity 243 corresponding to the annular protrusion 33 is also provided on the cavity 242. When fluid passes through the seal 3, the pressure generated squeezes the cavity 242, causing it to deform, thereby increasing the pressure in the flow guide cavity 243. This increased pressure pushes the annular protrusion 33 outward, further enhancing the sealing effect.

[0050] This design not only utilizes the pressure of the fluid to enhance the seal, but also, through the structural design of the cavity 242 and the guide cavity 243, enables the seal 3 to automatically adjust its sealing state when subjected to fluid pressure, thereby improving the reliability and durability of the valve.

[0051] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Any modifications and improvements to the technical solution of the present invention made by a person of ordinary skill in the art without departing from the design concept of the present invention shall fall within the scope of protection of the present invention. The technical content sought to be protected by the present invention is fully set forth in the claims.

Claims

1. A spherical stop valve with good sealing effect, characterized in that: The spherical stop valve comprises: a valve body having an inlet and at least one outlet; A connecting piece is detachably provided at the outlet, the connecting piece comprising a base, a head, and a connecting portion connecting the base and the head, and the connecting piece is further provided with a through hole connected to the outlet; a sealing member, disposed at one end of the through hole, and located on one side of the seat body, with one end of the sealing member connected to the through hole and the other end connected to the outlet; The sealing member is provided with a first connecting portion and a second connecting portion at both ends thereof, and at least two annular protrusions are provided on the outer side of the sealing member. After the connecting member and the valve body are assembled, the annular protrusions abut against the inner sidewalls of the outlet and the through hole respectively. A first groove cooperating with the first connecting part is provided on the inner wall of the outlet, and the first connecting part is interference fit in the first groove. A second groove cooperating with the second connecting part is provided in the through hole, and the second connecting part is interference fit in the second groove. When the fluid passes through the through hole, the pressure of the fluid can squeeze the annular protrusion outward.

2. The spherical stop valve with good sealing effect according to claim 1, characterized in that: The number of the annular protrusions is four, and the annular protrusions are located in pairs in the outlet and in the through hole respectively; The heights of the two annular protrusions located in the outlet gradually decrease along a side close to the first connecting portion; The heights of the two annular protrusions located in the through hole gradually decrease along a side close to the second connecting portion.

3. The spherical stop valve with good sealing effect according to claim 1 or 2, characterized in that: The inner side of the sealing member is further provided with a pressure equalizing groove, which is arranged corresponding to the annular protrusion and is used to increase the outward pressure of the fluid on the annular protrusion when the fluid passes through the through hole.

4. The spherical stop valve with good sealing effect according to claim 3, characterized in that: The first groove and the second groove are both annular grooves, and the first connecting portion and the second connecting portion are annular protrusions.

5. The spherical stop valve with good sealing effect according to claim 4, characterized in that: The cross section of the annular protrusion is an isosceles trapezoid.

6. The spherical stop valve with good sealing effect according to claim 5, characterized in that: The sealing member is made of one or more of silicone rubber, fluororubber, polyurethane and EPDM rubber.

7. The spherical stop valve with good sealing effect according to any one of claims 1 to 6, characterized in that: The inner side wall of the seal is further provided with a cavity, which is located below the annular protrusion. The cavity is further provided with a guide cavity corresponding to the annular protrusion. When the fluid passes through the seal, pressure is generated to squeeze the cavity and deform it, thereby increasing the pressure at the guide cavity to push the annular protrusion outward.

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