Compensation ball valve

Abstract

The utility model discloses a compensation ball valve, and relates to the technical field of switch valves. The compensation ball valve comprises a valve body, a valve ball and a sealing assembly, wherein a limiting check ring is arranged in the valve body; the valve ball is rotationally arranged in the valve body; the sealing assembly comprises a first elastic piece and a valve seat, the valve seat is matched with the valve ball in a sealing mode, one end of the first elastic piece abuts against the valve seat, and the other end of the first elastic piece abuts against the limiting check ring. According to the compensation ball valve, the abrasion loss of the valve seat can be compensated, the sealing performance is guaranteed, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of on-off valves, in particular to a compensating ball valve. Background Art

[0002] During pipeline transportation, on-off valves are needed to control the on-off of pipelines. Among common on-off valves, ball valves have become the main choice for on-off valves in pipelines due to their good sealing effect and small volume.

[0003] The working principle of a ball valve is to cooperate a valve ball with a through hole and a sealing component, and control the on-off of the pipeline by rotating the valve ball. Existing valve seats are usually made of a single hard material, and the valve ball and the valve seat are mutually matched in a hard-sealing manner. This hard-sealing method has poor sealing performance, and after long-term use, the sealing performance between the valve seat and the valve ball will be affected due to wear of the valve seat. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a compensating ball valve, which can compensate for the wear amount of the valve seat, ensure the sealing performance, and improve the service life.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A compensating ball valve, comprising:

[0007] A valve body, in which a limit retaining ring is arranged;

[0008] A valve ball, which is rotatably arranged in the valve body;

[0009] A sealing component, which comprises a first elastic member and a valve seat. The valve seat is in sealing cooperation with the valve ball. One end of the first elastic member abuts against the valve seat, and the other end of the first elastic member abuts against the limit retaining ring.

[0010] As an optional solution of the above compensating ball valve, the valve seat comprises a valve seat body and a sealing ring. An annular receiving groove is provided on the valve seat body, and the sealing ring is arranged in the receiving groove. Both the valve seat body and the sealing ring are in sealing cooperation with the valve ball.

[0011] As an optional solution of the above compensating ball valve, the part of the valve seat body outside the receiving groove forms a first sealing portion, and the part of the valve seat body inside the receiving groove forms a second sealing portion. Both the first sealing portion and the second sealing portion are in sealing cooperation with the valve ball.

[0012] As an optional solution of the above compensating ball valve, the hardness of the first sealing portion and the hardness of the second sealing portion are both greater than the hardness of the sealing ring.

[0013] As an alternative to the above-mentioned compensating ball valve, the valve seat further includes an annular second elastic member disposed at the bottom of the receiving groove, and the sealing ring is pressed against the second elastic member. When the sealing ring wears, the second elastic member can provide a pre-tightening force to press the sealing ring against the ball valve, thereby ensuring the sealing performance.

[0014] As an alternative to the above-mentioned compensating ball valve, the first elastic member is a spring, and the ball valve is provided with a second passage, and the spring is disposed around the outside of the second passage.

[0015] As an alternative to the above-mentioned compensating ball valve, the valve body is provided with a first passage, and the valve seat is in sealing cooperation with the inner wall of the first passage.

[0016] As an alternative to the above-mentioned compensating ball valve, the compensating ball valve includes two sets of the sealing assemblies, and the two sets of the sealing assemblies are respectively located on opposite sides of the ball valve.

[0017] As an alternative to the above-mentioned compensating ball valve, the valve body includes a main body and a valve cover, the valve cover is detachably connected to the main body, and the limiting retaining rings are disposed in both the main body and the valve cover.

[0018] As an alternative to the above-mentioned compensating ball valve, the valve body includes a main body and two valve covers, each valve cover is respectively detachably connected to both ends of the main body, and the limiting retaining rings are disposed in each valve cover.

[0019] Advantages of the present utility model:

[0020] The present utility model provides a compensating ball valve. In this compensating ball valve, the valve seat of the sealing assembly is driven by the first elastic member to abut against the ball valve, so that the valve seat and the ball valve are in sealing cooperation. This structure enables the valve seat to move for self-adjustment when the ball valve rotates, reducing the wear with the ball valve. Moreover, even if the valve seat wears, the first elastic member can still provide a pre-tightening force to press the valve seat against the ball valve, ensuring that there is sufficient squeezing force between the valve seat and the ball valve, preventing a gap from being generated between the valve seat and the ball valve, and ensuring the sealing performance.

[0021] This compensating ball valve can reduce wear, compensate for the wear amount of the valve seat, ensure the sealing performance, and improve the service life. Description of the Drawings

[0022] Figure 1 is a schematic structural view of the compensating ball valve provided by Embodiment 1 of the present utility model;

[0023] Figure 2 is a cross-sectional view of the compensating ball valve provided by Embodiment 1 of the present utility model;

[0024] Figure 3It is a sectional exploded view of the compensating ball valve provided by the first embodiment of the present utility model;

[0025] Figure 4 It is a sectional view of the compensating ball valve provided by the second embodiment of the present utility model.

[0026] In the figure:

[0027] 1, valve body; 2, valve ball; 3, sealing assembly; 4, rotating rod; 5, handle; 6, second sealing ring;

[0028] 11, main body; 12, valve cover; 13, first channel; 14, limit projection; 15, limit retaining ring; 21, second channel; 31, first elastic member; 32, valve seat; 51, first limit portion; 52, second limit portion;

[0029] 321, valve seat body; 322, sealing ring; 323, second elastic member; 324, first sealing ring;

[0030] 3211, first sealing portion; 3212, second sealing portion; 3213, receiving groove; 3214, through hole. Detailed implementation manners

[0031] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model and should not be construed as a limitation of the present utility model.

[0032] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0033] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0034] Unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0036] Embodiment 1

[0037] In the process of pipeline transportation, it is necessary to use a switch valve to control the on and off of the pipeline. Among the common switch valves, the ball valve has become the main choice of switch valves in pipelines due to its good sealing effect and small size.

[0038] This embodiment provides a compensating ball valve, such as Figures 1 to 3 As shown, the compensating ball valve includes a valve body 1, a valve ball 2 and a sealing assembly 3. The valve body 1 is provided with a first channel 13, the valve body 1 is arranged in a pipeline, and both ends of the first channel 13 are connected to the pipeline. The valve ball 2 is provided with a second channel 21, and the valve ball 2 is rotatably arranged in the first channel 13. The sealing assembly 3 includes a valve seat 32, the valve seat 32 has a through hole 3214, and the valve seat 32 is sealed and abutted against the valve ball 2.

[0039] By the rotation of the valve ball 2, when the second channel 21 intersects with the through hole 3214 of the sealing component 3, the compensation ball valve is in an open state, and when the second channel 21 is staggered with the through hole 3214 of the sealing component 3, the compensation ball valve is in a disconnected state. It can be understood that as the range of intersection between the second channel 21 and the through hole 3214 changes, the flow rate of the compensation ball valve also changes to achieve control of the pipeline flow rate.

[0040] It can be understood that when the valve ball 2 rotates, it will cause wear to the valve seat 32. After long-term use, a gap will be generated between the valve seat 32 and the valve ball 2, resulting in poor sealing performance and affecting the service life.

[0041] As Figure 2 and Figure 3 shown, to solve the above problems, the sealing assembly 3 includes a first elastic member 31. A limiting retaining ring 15 is arranged in the valve body 1. One end of the first elastic member 31 abuts against the valve seat 32, and the other end of the first elastic member 31 abuts against the limiting retaining ring 15.

[0042] In this compensating ball valve, the valve seat 32 of the sealing assembly 3 is driven by the first elastic member 31 to abut against the valve ball 2, so that the valve seat 32 and the valve ball 2 are in sealing fit. This structure enables the valve seat 32 to move and self-adjust when the valve ball 2 rotates, reducing the wear with the valve ball 2. Moreover, even if the valve seat 32 wears, the first elastic member 31 can still provide a pre-tightening force to press the valve seat 32 against the valve ball 2, ensuring that there is sufficient extrusion force between the valve seat 32 and the valve ball 2, avoiding the generation of a gap between the valve seat 32 and the valve ball 2, and ensuring the sealing performance. This compensating ball valve can reduce wear and compensate for the wear amount of the valve seat 32, ensuring the sealing performance and improving the service life.

[0043] In addition, the existing valve seat 32 is usually made of a single hard material, and the valve ball 2 and the valve seat 32 are matched in a hard-sealing manner, and the sealing performance of this structure is poor.

[0044] To solve the above problems, in the valve seat 32 of this embodiment, it includes a relatively hard valve seat body 321 and a relatively soft sealing ring 322. An annular receiving groove 3213 is provided on the valve seat body 321, and the sealing ring 322 is arranged in the receiving groove 3213. Both the valve seat body 321 and the sealing ring 322 are in sealing fit with the valve ball 2. This embodiment adopts the above-mentioned sealing method of combining hard and soft, which can greatly improve the sealing performance between the valve seat 32 and the valve ball 2. In addition, the receiving groove 3213 can limit the sealing ring 322, ensuring that the deformation degree of the sealing ring 322 is controllable when being extruded, so as to ensure the sealing performance between the sealing ring 322 and the valve ball 2.

[0045] It can be understood that there are often solid particles such as welding slag, salad, rust, and wood chips in the pipeline. The solid particles are likely to cause wear to soft sealing parts such as rubber, reducing the sealing performance and affecting the service life.

[0046] As Figure 2 and Figure 3As shown in the figure, to solve the above problems, the part of the valve seat body 321 outside the receiving groove 3213 forms a first sealing portion 3211, and the part of the valve seat body 321 inside the receiving groove 3213 forms a second sealing portion 3212. Both the first sealing portion 3211 and the second sealing portion 3212 are in sealing cooperation with the valve ball 2. That is to say, there is also sealing cooperation between the valve seat body 321 and the valve ball 2, and the sealing between the valve seat body 321 and the valve ball 2 is located inside and outside the sealing ring 322. Therefore, the valve seat body 321 can protect the sealing ring 322 and minimize the wear of the sealing ring 322 caused by solid particles.

[0047] Furthermore, the hardness of the first sealing portion 3211 and the hardness of the second sealing portion 3212 are both greater than the hardness of the sealing ring 322. This structure is equivalent to two hard seals protecting the soft seal from both sides, which can not only ensure the sealing performance but also protect the soft seal, preventing the soft seal from being worn by solid particles and affecting the sealing performance, thus improving the service life.

[0048] In this embodiment, the valve seat body 321 is made of a metal material such as iron or copper to ensure that the valve seat body 321 has sufficient hardness and wear resistance; the sealing ring 322 is made of PTFE material (Polytetrafluoroethylene). The PTFE material is a kind of polymer with excellent heat resistance and cold resistance, acid and alkali resistance, and low friction coefficient, which can reduce the resistance when the valve ball 2 rotates on the premise of ensuring the sealing performance and improve the user experience.

[0049] It is worth noting that the first sealing portion 3211, the second sealing portion 3212, and the sealing ring 322 are all annular.

[0050] In this embodiment, as Figure 3 shown, the ends of the first sealing portion 3211 and the ends of the second sealing portion 3212 are located on the same spherical surface, and the curvature of the spherical surface is the same as the surface curvature of the valve ball 2. This structure can enable the first sealing portion 3211 and the second sealing portion 3212 to simultaneously abut against the outer surface of the valve ball 2, and the pressure of the first sealing portion 3211 and the second sealing portion 3212 on the valve ball 2 is the same. That is to say, the first sealing portion 3211 and the second sealing portion 3212 have the same ability to block solid particles, and it will not occur that one of the first sealing portion 3211 and the second sealing portion 3212 abuts against the valve ball 2 first, resulting in too large a gap between the other and the valve ball 2 and affecting the protection effect on the sealing ring 322.

[0051] In this embodiment, as Figure 3As shown, the sealing ring 322 protrudes from the spherical surface. This structure of the sealing ring 322 can ensure that there is sufficient pressure between the sealing ring 322 and the valve ball 2 to deform the sealing ring 322, so the sealing performance can be improved. Moreover, when the sealing ring 322 is worn by the valve ball 2, it can also compensate for the wear amount through its own deformation, extending the service life of this compensated ball valve.

[0052] As Figure 3 shown, the first sealing portion 3211, the second sealing portion 3212, and the sealing ring 322 are all adapted to the surface of the valve ball 2. That is to say, each surface of the first sealing portion 3211, the second sealing portion 3212, and the sealing ring 322 that abuts against the valve ball 2 is a curved surface, and the curved surface can fit the surface of the valve ball 2, making the first sealing portion 3211, the second sealing portion 3212, and the sealing ring 322 all have surface seals with the valve ball 2, improving the sealing effect. Structurally, when the sealing ring 322 is compressed, the end faces of the sealing ring 322, the first sealing portion 3211, and the second sealing portion 3212 are located on the same spherical surface.

[0053] As Figure 2 and Figure 3 shown, the valve seat 32 further includes an annular second elastic member 323. The second elastic member 323 is disposed at the bottom of the receiving groove 3213, and the sealing ring 322 is pressed against the second elastic member 323. The second elastic member 323 can make the sealing ring 322 press against the valve ball 2 through its own deformation, and moreover, it releases part of the elastic force after the sealing ring 322 is worn to still press the sealing ring 322 tightly against the valve ball 2 to ensure the sealing performance. Moreover, compared with the sealing ring 322, the second elastic member 323 has a greater degree of deformation and greater elasticity, so its compensation amount for the wear of the sealing ring 322 is also greater, further extending the service life of the compensated ball valve.

[0054] To ensure stability, the second elastic member 323 is an elastic ring. It can be understood that the axial travel of the sealing ring 322 is short, and the elastic ring can generate a large elastic force within a short travel, ensuring that there is sufficient abutting force between the sealing ring 322 and the valve ball 2.

[0055] In this embodiment, the elastic ring is an O-ring. There is a gap between the O-ring and the sealing groove, so the O-ring has sufficient deformation space and is relatively uniform during deformation, ensuring that the abutting force between the sealing ring 322 and the valve ball 2 is evenly distributed circumferentially.

[0056] In this embodiment, the valve seat 32 is in sealing cooperation with the inner wall of the first channel 13. Specifically, a first sealing ring 324 is sleeved on the outer periphery of the valve seat body 321, and the first sealing ring 324 is in sealing abutment with the inner wall of the first channel 13, so that the fluid can only pass through the second channel 21 of the valve ball 2.

[0057] In this embodiment, the first elastic member 31 is a spring, which is disposed around the outside of the second channel 21. Compared with using multiple small-diameter springs, a large-diameter spring is selected, which is convenient for assembly and has a large pre-tightening force on the valve seat 32. It can also ensure that the pre-tightening force is evenly distributed along the circumference of the valve seat body 321, and avoids the spring from deflecting or bending, thereby ensuring the sealing between the valve seat 32 and the valve ball 2.

[0058] It is worth noting that the elastic force of the first elastic member 31 is greater than the elastic force of the second elastic member 323, so as to ensure that the first elastic member 31 can compress the second elastic member 323 when driving the valve seat body 321 close to the valve ball 2, thereby ensuring the sealing performance between the sealing ring 322 and the valve seat body 321 and the valve ball 2.

[0059] It is understandable that, although the compensating ball valve can be opened and closed by providing a sealing assembly 3 at one end of the valve ball 2 along the axial direction of the first channel 13, in order to improve redundancy, the compensating ball valve includes two sets of sealing assemblies 3, and the two sets of sealing assemblies 3 are respectively located on opposite sides of the valve ball 2. Among them, the two sets of sealing assemblies 3 can open both ends of the second channel 21 at the same time. As the valve ball 2 rotates, when one end of the second channel 21 of the valve ball 2 is directly opposite to the through hole 3214 of one set of sealing assemblies 3, the other end of the second channel 21 of the valve ball 2 is directly opposite to the through hole 3214 of the other set of sealing assemblies 3, and the flow rate of the compensating ball valve is the largest at this time; when one end of the second channel 21 of the valve ball 2 is completely staggered with the through hole 3214 of one set of sealing assemblies 3, the other end of the second channel 21 of the valve ball 2 is also completely staggered with the through hole 3214 of the other set of sealing assemblies 3, and the compensating ball valve is in a closed state at this time.

[0060] It is worth noting that the first channel 13 of the valve body 1 can be linear or zigzag to improve the applicability of the compensation ball valve. Correspondingly, the second channel 21 of the valve ball 2 can be adapted to the first channel 13, and can also be linear or zigzag, but it is necessary to ensure that the two sets of sealing components 3 do not interfere with each other.

[0061] like Figure 2 As shown, in order to facilitate assembly and disassembly, in this embodiment, the valve body 1 includes a main body 11 and a valve cover 12, the valve cover 12 is detachably connected to the main body 11, and both the main body 11 and the valve cover 12 are provided with a limit retaining ring 15.

[0062] During assembly, a set of sealing components 3 is first installed into the main body 11 from the opening, and the first elastic member 31 of the sealing component 3 abuts against the sealing retaining wall of the main body 11, and then the valve ball 2 and another set of sealing components 3 are installed in sequence, and then the valve cover 12 is installed on the main body 11 so that the first elastic member 31 of the latter set of sealing components 3 abuts against the limiting retaining wall of the valve cover 12. The valve cover 12 is provided with threads, which is convenient for connecting external pipelines to connect the compensation ball valve to the pipeline.

[0063] like Figure 1 and Figure 2 As shown, the compensating ball valve further includes a rotating rod 4 and a handle 5. The rotating rod 4 is disposed through the valve body 1 and connected to the valve ball 2. The rotating axis of the rotating rod 4 is perpendicular to the second channel 21. The handle 5 is fixedly connected to the rotating rod 4. When the operator rotates the handle 5, the valve ball 2 can be driven to rotate through the rotating rod 4, thereby controlling the on and off of the compensating ball valve.

[0064] In order to prevent fluid leakage from between the rotating rod 4 and the valve body 1, the compensating ball valve further includes a second sealing ring 6, which is sleeved on the rotating rod 4 and seals against the valve body 1. In order to further improve the sealing performance, the compensating ball valve includes a plurality of second sealing rings 6, which are sleeved on the rotating rod 4 at intervals.

[0065] In this embodiment, if Figure 1 As shown, the valve body 1 is provided with a limiting protrusion 14, and the handle 5 is provided with a first limiting portion 51 and a second limiting portion 52. When the handle 5 is rotated until the first limiting portion 51 abuts against the limiting protrusion 14, the compensating ball valve is in a fully open state, that is, the second channel 21 is directly opposite to the through hole 3214; when the handle 5 is rotated until the second limiting portion 52 abuts against the limiting protrusion 14, the compensating ball valve is in a fully closed state, that is, the second channel 21 is completely offset from the through hole 3214.

[0066] Embodiment 2

[0067] This embodiment improves the valve body 1 on the basis of the first embodiment.

[0068] In this embodiment, the valve body 1 includes a main body 11 and two valve covers 12 . Each valve cover 12 is detachably connected to two ends of the main body 11 . A limit retaining ring 15 is disposed in each valve cover 12 .

[0069] During assembly, the valve ball 2 can be first installed into the main body 11 and fixed to the valve ball 2 using the rotating rod 4, and then the sealing components 3 are respectively installed on the opposite sides of the valve ball 2, and finally the valve covers 12 are respectively installed at both ends of the main body 11, and the first elastic member 31 of each set of sealing components 3 abuts against the limit retaining ring 15 of the valve cover 12 at the corresponding end.

[0070] This structure is convenient for later maintenance, and when a certain group of sealing components 3 fails and causes sealing failure, the corresponding valve cover 12 can also be opened for maintenance.

[0071] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A compensating ball valve, characterized in that: include: A valve body (1), wherein a limit stop ring (15) is arranged inside the valve body (1); a valve ball (2), the valve ball (2) being rotatably disposed in the valve body (1); A sealing assembly (3), the sealing assembly (3) comprising a first elastic member (31) and a valve seat (32), the valve seat (32) being sealingly matched with the valve ball (2), one end of the first elastic member (31) abutting against the valve seat (32), and the other end of the first elastic member (31) abutting against the limit retaining ring (15).

2. The compensating ball valve according to claim 1, characterized in that: The valve seat (32) comprises a valve seat body (321) and a sealing ring (322); the valve seat body (321) is provided with an annular receiving groove (3213), the sealing ring (322) is arranged in the receiving groove (3213), and the valve seat body (321) and the sealing ring (322) are both sealed and matched with the valve ball (2).

3. The compensating ball valve according to claim 2, characterized in that: The portion of the valve seat body (321) located outside the receiving groove (3213) forms a first sealing portion (3211), and the portion of the valve seat body (321) located within the receiving groove (3213) forms a second sealing portion (3212), and both the first sealing portion (3211) and the second sealing portion (3212) are sealed with the valve ball (2).

4. The compensating ball valve according to claim 3, characterized in that: The hardness of the first sealing portion (3211) and the hardness of the second sealing portion (3212) are both greater than the hardness of the sealing ring (322).

5. The compensating ball valve according to claim 2, characterized in that: The valve seat (32) further comprises a second annular elastic member (323), wherein the second elastic member (323) is arranged at the bottom of the accommodating groove (3213), and the sealing ring (322) is pressed against the second elastic member (323).

6. The compensating ball valve according to any one of claims 1 to 5, characterized in that: The first elastic member (31) is a spring, the valve ball (2) is provided with a second passage (21), and the spring is arranged around the outside of the second passage (21).

7. The compensating ball valve according to any one of claims 1 to 5, characterized in that: The valve body (1) is provided with a first channel (13), and the valve seat (32) is in sealing cooperation with the inner wall of the first channel (13).

8. The compensating ball valve according to any one of claims 1 to 5, characterized in that: The compensating ball valve comprises two groups of sealing components (3), and the two groups of sealing components (3) are respectively located on two opposite sides of the valve ball (2).

9. The compensating ball valve according to any one of claims 1 to 5, characterized in that: The valve body (1) comprises a main body (11) and a valve cover (12); the valve cover (12) is detachably connected to the main body (11); and the limit retaining ring (15) is disposed inside the main body (11) and the valve cover (12).

10. The compensating ball valve according to any one of claims 1 to 5, characterized in that: The valve body (1) comprises a main body (11) and two valve covers (12), each of the valve covers (12) being detachably connected to two ends of the main body (11), and each of the valve covers (12) is provided with a limit ring (15).

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