Filtering type ball valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a filtering type ball valve. Comprising a valve body, a valve cover arranged at the top of the valve body, a valve ball and a valve rod, the positions, located on the two sides of the valve ball, in the valve body are each provided with a limiting ring groove, and elastic sealing rings are arranged in the limiting ring grooves and comprise first sealing ring parts, second sealing ring parts and third sealing ring parts; the elastic ring part is connected to the end, away from the valve ball, of the first sealing ring part, and the section of the elastic ring part is corrugated; the positioning ring part is connected to the other end of the elastic ring part; the positioning ring part is provided with a second sealing ring part axially abutting against the limiting ring groove. The section of the elastic ring part is in a corrugated shape, so that the elastic ring part has elasticity, a closed annular cavity is formed among the first sealing ring part, the elastic ring part, the positioning ring part and the valve body, so that the valve ball and the valve body are sealed, and under the impact of a high-pressure medium, the valve ball vibrates and deviates; the resilience force of the elastic ring part can ensure the sealing between the valve ball and the valve body by the elastic sealing ring.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and particularly relates to a filtering ball valve. Background Art

[0002] A valve is a pipeline accessory used to open and close pipelines, control the flow direction, and adjust and control the parameters of the transported medium. According to its functions, it can be divided into ball valves, check valves, regulating valves, etc. A ball valve mainly includes a valve body, a valve ball, and a valve seat. When high-pressure medium passes through the valve ball in the valve body, the high pressure and impact force of the medium will cause the valve ball to vibrate and shift slightly, thus affecting the sealing performance of the ball valve. Therefore, a ball valve that can ensure the sealing performance of the ball valve under the condition of valve ball offset and vibration is needed.

[0003] In the prior art, in order to ensure the sealing performance of the ball valve under the condition of valve ball offset and vibration, a spring is usually axially abutted against the valve seat, and through the elasticity of the spring, the valve seat is always abutted against the surface of the valve ball. However, the valve seat reciprocates in the valve body, which is easy to cause wear and make the sealing performance between the valve seat and the valve body worse. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a filtering ball valve for the above-mentioned existing technical problems. The cross-section of the elastic ring part is corrugated, so it has elasticity. A closed annular cavity is formed between the first sealing ring part, the elastic ring part, the positioning ring part and the valve body, so as to seal between the valve ball and the valve body. And under the impact of high-pressure medium, when the valve ball vibrates and shifts, the elastic sealing ring can ensure the seal between the valve ball and the valve body through the resilience of the elastic ring part.

[0005] In view of this, the utility model provides a filtering ball valve, including: a valve body, a valve cover arranged on the top of the valve body, a valve ball arranged in the valve body, and a valve rod passing through the valve cover and connected to the top of the valve ball. Limiting ring grooves are respectively arranged on both sides of the valve ball in the valve body, and an elastic sealing ring is arranged in the limiting ring grooves. The elastic sealing ring includes:

[0006] A first sealing ring part, abutted against the surface of the valve ball;

[0007] An elastic ring part, connected to the end of the first sealing ring part far away from the valve ball, and the cross-section of the elastic ring part is corrugated;

[0008] A positioning ring part, connected to the other end of the elastic ring part;

[0009] Wherein, a second sealing ring part axially abutted against the limiting ring groove is arranged on the positioning ring part.

[0010] In the above solution, further, a first retaining ring is provided at one end of the limiting ring groove away from the valve ball, and the first retaining ring is threadedly connected to the inner peripheral wall of the valve body. The limiting ring groove includes a first ring groove and a second ring groove provided at one end of the first ring groove away from the valve ball, and the inner diameter of the first ring groove is smaller than that of the second ring groove;

[0011] Wherein, the first sealing ring portion and the elastic ring portion are both provided in the first ring groove, and the positioning ring portion is provided in the second ring groove, and the positioning ring portion abuts against the first retaining ring.

[0012] In the above solution, further, a second retaining ring is provided at one end of the first retaining ring away from the elastic sealing ring, and the second retaining ring is threadedly connected to the inner peripheral wall of the valve body. An elastic gasket is provided between the first retaining ring and the second retaining ring, and both ends of the elastic gasket abut against the first retaining ring and the second retaining ring respectively.

[0013] In the above solution, further, the elastic sealing ring further includes:

[0014] A protective ring portion, connected to the first sealing ring portion at one end close to the valve ball, and the protective ring portion is located inside the elastic ring portion.

[0015] In the above solution, further, the valve ball includes two ports, and filter assemblies are provided on both ports. The filter assemblies include:

[0016] A support ring, provided on the port of the valve ball;

[0017] A filter net, provided inside the support ring.

[0018] In the above solution, further, the outer peripheral wall of the support ring is threadedly connected to the port of the valve ball.

[0019] In the above solution, further, a filter cavity is formed between the two filter assemblies, and filter packing is provided in the filter cavity.

[0020] The beneficial effects of the present utility model are:

[0021] 1. The cross-section of the elastic ring portion is corrugated, so it has elasticity. A closed annular cavity is formed between the first sealing ring portion, the elastic ring portion and the positioning ring portion and the valve body, so as to seal between the valve ball and the valve body. And under the impact of high-pressure medium, the valve ball vibrates and deflects, and the resilience of the elastic ring portion can ensure the seal between the elastic sealing ring and the valve ball and the valve body;

[0022] 2. Both the first retaining ring and the second retaining ring are threadedly connected in the valve body, and the resilience of the elastic gasket can increase the friction between the first retaining ring and the second retaining ring and the valve body, so as to prevent the first retaining ring and the second retaining ring from loosening;

[0023] 3. The filter packing filled between the filter components arranged at both ports of the valve ball can further filter the medium and further improve the medium quality. Description of the Drawings

[0024] Figure 1 is a schematic cross-sectional structure diagram of the present utility model;

[0025] Figure 2 is of the present utility model Figure 1 schematic structure diagram at A;

[0026] Figure 3 is of the present utility model Figure 1 schematic structure diagram at B;

[0027] Figure 4 is a schematic structure diagram of the filter component of the present utility model.

[0028] The markings in the figure are shown as:

[0029] 1, valve body; 2, valve cover; 3, valve ball; 4, elastic sealing ring; 41, first sealing ring part; 42, elastic ring part; 43, positioning ring part; 44, second sealing ring part; 45, protective ring part; 5, limit ring groove; 51, first ring groove; 52, second ring groove; 6, first retaining ring; 7, second retaining ring; 8, elastic gasket; 9, filter component; 91, support ring; 92, filter net; 10, filter packing. Detailed Embodiment

[0030] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope protected by the present application.

[0031] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For the convenience of description, the dimensions of each part shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but in appropriate cases, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0032] Example 1:

[0033] This embodiment provides a filtering ball valve, including: a valve body 1, a valve cover 2 provided at the top of the valve body 1, a valve ball 3 provided in the valve body 1, and a valve stem passing through the valve cover 2 and connected to the top of the valve ball 3. On both sides of the valve ball 3 in the valve body 1, a limit ring groove 5 is respectively provided, and an elastic seal is provided in the limit ring groove 5. The elastic seal includes:

[0034] A first sealing ring portion 41, which abuts against the surface of the valve ball 3;

[0035] An elastic ring portion 42, which is connected to one end of the first sealing ring portion 41 away from the valve ball 3, and the cross-section of the elastic ring portion 42 is corrugated;

[0036] A positioning ring portion 43, which is connected to the other end of the elastic ring portion 42;

[0037] Wherein, a second sealing ring portion 44 axially abutting against the limit ring groove 5 is provided on the positioning ring portion 43.

[0038] In this technical solution, the valve ball 3 and the valve stem are installed into the valve body 1 from the installation hole at the top of the valve body 1, and then the valve cover 2 is installed, which has the effect of facilitating the installation, disassembly and maintenance of the valve ball 3 and the valve stem. Flange plates can be provided at both ends of the valve body 1, and the valve body 1 and the external pipeline can be connected by flanges.

[0039] The elastic seal can be made of polytetrafluoroethylene, and the first sealing ring portion 41, the elastic ring portion 42 and the positioning ring portion 43 can be integrally formed, reducing the installation steps.

[0040] The first sealing ring portion 41 abuts against the surface of the valve ball 3, and the positioning ring portion 43 abuts against the limit ring groove 5. Therefore, there is a closed annular cavity between the elastic ring portion 42, the first sealing ring portion 41, the positioning ring portion 43 and the valve body 1, so as to seal between the valve body 1 and the valve ball 3 and prevent medium leakage.

[0041] The cross-section of the elastic ring portion 42 is corrugated, so the elastic ring portion 42 has elasticity and its length can be changed.

[0042] A second sealing ring portion 44 axially abutting against the limit ring groove 5 is provided on the positioning ring portion 43. The second sealing ring portion 44 can be made of an elastic material, such as rubber, or can also be made of a plastic material, such as polytetrafluoroethylene. The second sealing ring portion 44 is used to further increase the sealing performance between the positioning ring portion 43 and the limit ring groove 5.

[0043] After the elastic seal is installed in the limit ring groove 5, the valve ball 3 is installed in the valve body 1. The valve ball 3 presses the elastic seal, causing the elastic ring portion 42 to be compressed. The resilience of the elastic ring portion 42 pushes the first seal ring portion 41, making the first seal ring portion 41 closely contact the surface of the valve ball 3, thereby increasing the sealing performance between the first seal ring portion 41 and the valve ball 3. At the same time, the resilience of the elastic ring portion 42 pushes the positioning ring portion 43, making the positioning ring portion 43 closely contact the surface of the valve ball 3, thereby increasing the sealing performance between the positioning ring portion 43 and the valve body 1.

[0044] When the ball valve is used for a long time, the valve ball 3 rotates and rubs against the first seal ring portion 41, and the first seal ring portion 41 will be worn, affecting the sealing performance. The resilience of the elastic ring portion 42 can keep the first seal ring portion 41 in contact with the valve ball 3, ensuring the sealing performance and prolonging the service life of the elastic seal.

[0045] When the valve ball 3 is impacted by high-pressure medium, it is prone to slight vibration and deviation, thus affecting the sealing performance. When the valve ball 3 deviates to the right, the right elastic ring portion 42 is compressed, and the right first seal ring portion 41 slides to the right. The left elastic ring portion 42 rebounds, and the left first seal ring portion 41 slides to the right and contacts the surface of the valve ball 3, thereby maintaining the seal. When the valve ball 3 deviates to the left, the same principle applies. Therefore, in the case of vibration and deviation of the valve ball 3, the elastic seal can still ensure the sealing performance of the ball valve.

[0046] A handle can be installed on the valve stem to rotate the valve stem, or a conventional electric actuator can be installed to drive the valve stem to rotate. The valve stem can be provided with a double-bearing structure to prevent the valve stem from being damaged, which can include a bearing at one end of the valve stem close to the valve ball 3 and another bearing at one end of the valve stem close to the actuator. It can ensure that the valve stem only transmits the torque to the valve ball 3 when transmitting the torque of the actuator and will not be damaged due to possible bending moments, which is not shown in the figure.

[0047] Embodiment 2:

[0048] This embodiment provides a filter-type ball valve, which has the following technical features in addition to the technical solutions of the above embodiment.

[0049] A first retaining ring 6 is provided at one end of the limit ring groove 5 away from the valve ball 3. The first retaining ring 6 is threadedly connected to the inner peripheral wall of the valve body 1. The limit ring groove 5 includes a first ring groove 51 and a second ring groove 52 provided at one end of the first ring groove 51 away from the valve ball 3. The inner diameter of the first ring groove 51 is smaller than the inner diameter of the second ring groove 52;

[0050] Wherein, the first seal ring portion 41 and the elastic ring portion 42 are both arranged in the first ring groove 51, and the positioning ring portion 43 is arranged in the second ring groove 52. The positioning ring portion 43 abuts against the first retaining ring 6.

[0051] In this technical solution, the inner diameter of the first annular groove 51 is smaller than that of the second annular groove 52. Therefore, a stepped surface is formed between the first annular groove 51 and the second annular groove 52, and the second sealing ring portion 44 can abut against the stepped surface.

[0052] The positioning ring portion 43 is arranged in the second annular groove 52. The positioning ring portion 43 abuts against the first retaining ring 6. The positioning ring portion 43 is adapted to the shape of the second annular groove 52. Therefore, the positioning ring portion 43 cannot move axially along the limiting annular groove 5, and the positioning ring portion 43 is positioned by the second annular groove 52, ensuring that the second sealing ring portion 44 can abut against the stepped surface and improving the sealing performance with the valve body 1.

[0053] Both the first sealing ring portion 41 and the elastic ring portion 42 are arranged in the first annular groove 51. When the valve ball 3 vibrates and deflects, the first sealing ring portion 41 can slide in the first annular groove 51.

[0054] The first retaining ring 6 is threadedly connected to the inner peripheral wall of the valve body 1, facilitating the disassembly and installation of the first retaining ring 6 when the elastic seal needs to be installed and replaced.

[0055] Embodiment 3:

[0056] This embodiment provides a filtering ball valve. In addition to including the technical solution of the above embodiment, it also has the following technical features.

[0057] A second retaining ring 7 is arranged at one end of the first retaining ring 6 away from the elastic seal. The second retaining ring 7 is threadedly connected to the inner peripheral wall of the valve body 1. An elastic gasket 8 is arranged between the first retaining ring 6 and the second retaining ring 7, and both ends of the elastic gasket 8 abut against the first retaining ring 6 and the second retaining ring 7 respectively.

[0058] In this technical solution, since the first retaining ring 6 is threadedly connected in the valve body 1, it is prone to loosening. Both ends of the elastic gasket 8 abut against the first retaining ring 6 and the second retaining ring 7 respectively. The elastic gasket 8 is compressed by the first retaining ring 6 and the second retaining ring 7, and the resilience of the elastic gasket 8 can increase the friction between the first retaining ring 6 and the second retaining ring 7 and the valve body 1, thereby preventing the first retaining ring 6 and the second retaining ring 7 from loosening.

[0059] Embodiment 4:

[0060] This embodiment provides a filtering ball valve. In addition to including the technical solution of the above embodiment, it also has the following technical features.

[0061] The elastic seal further includes:

[0062] A protective ring portion 45, with one end close to the valve ball 3 connected to the first sealing ring portion 41, and the protective ring portion 45 is located inside the elastic ring portion 42.

[0063] In this technical solution, the inner peripheral wall of the protective ring portion 45 is a smooth surface. The protective ring portion 45 is used to protect the elastic ring portion 42 and can also reduce the medium resistance.

[0064] Embodiment 5:

[0065] This embodiment provides a filtering ball valve. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0066] The valve ball 3 includes two ports, and filtering components 9 are arranged on both ports. The filtering component 9 includes:

[0067] A support ring 91, arranged on the port of the valve ball 3;

[0068] A filter net 92, arranged inside the support ring 91.

[0069] In this technical solution, the filter net 92 can be a metal filter net 92, and the filter net 92 can be of a multi-layer structure. The support ring 91 can be welded, clamped or threadedly connected to the port of the valve ball 3. The valve body 1 includes a water inlet and a water outlet. The medium can be filtered through the filter net 92 near the water inlet, so as to filter out the impurities in the medium and improve the quality of the medium.

[0070] Filtering components 9 are arranged on both ports. The filtering holes of the filter net 92 of the filtering component 9 near the water outlet can be smaller than those of the other filter net 92. The filtering component 9 near the water outlet can further filter the medium and further improve the quality of the medium.

[0071] Embodiment 6:

[0072] This embodiment provides a filtering ball valve. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0073] The outer peripheral wall of the support ring 91 is threadedly connected to the port of the valve ball 3.

[0074] In this technical solution, the threaded connection method is convenient for disassembling and replacing the filtering component 9, and the threaded connection is more stable. A groove can be arranged at the outer end of the support ring 91 to facilitate the use of tools to be inserted into the groove for rotating and removing and installing the filtering component 9.

[0075] Embodiment 7:

[0076] This embodiment provides a filtering ball valve. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0077] A filtering cavity is formed between the two filtering components 9, and a filtering filler 10 is arranged in the filtering cavity.

[0078] In this technical solution, the filtering cavity is cylindrical, and the filtering filler 10 can be activated carbon. The filtering filler 10 is used to further filter the medium. When the medium is drinkable tap water, the activated carbon can also adsorb harmful substances in the medium, such as rust, etc., thereby further improving the quality of the medium.

[0079] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection scope of the present application.

Claims

1. A filtering ball valve, characterized in that, Comprising: A valve body (1), a valve cover (2) provided at the top of the valve body (1), a valve ball (3) provided inside the valve body (1), and a valve stem passing through the valve cover (2) and connected to the top of the valve ball (3). On both sides of the valve ball (3) inside the valve body (1), a limiting ring groove (5) is respectively provided. An elastic sealing ring (4) is provided in the limiting ring groove (5). The elastic sealing ring (4) comprises: A first sealing ring portion (41) that abuts against the surface of the valve ball (3); An elastic ring portion (42) connected to one end of the first sealing ring portion (41) away from the valve ball (3), and the cross-section of the elastic ring portion (42) is corrugated; A positioning ring portion (43) connected to the other end of the elastic ring portion (42); Wherein, a second sealing ring portion (44) axially abutting against the limiting ring groove (5) is provided on the positioning ring portion (43).

2. The filtering type ball valve according to claim 1, wherein A first retaining ring (6) is provided at one end of the limiting ring groove (5) away from the valve ball (3). The first retaining ring (6) is threadedly connected to the inner peripheral wall of the valve body (1). The limiting ring groove (5) comprises a first ring groove (51) and a second ring groove (52) provided at one end of the first ring groove (51) away from the valve ball (3). The inner diameter of the first ring groove (51) is smaller than the inner diameter of the second ring groove (52); Wherein, the first sealing ring portion (41) and the elastic ring portion (42) are both provided in the first ring groove (51), and the positioning ring portion (43) is provided in the second ring groove (52), and the positioning ring portion (43) abuts against the first retaining ring (6).

3. The filtering type ball valve according to claim 2, wherein A second retaining ring (7) is provided at one end of the first retaining ring (6) away from the elastic sealing ring (4). The second retaining ring (7) is threadedly connected to the inner peripheral wall of the valve body (1). An elastic gasket (8) is provided between the first retaining ring (6) and the second retaining ring (7). Both ends of the elastic gasket (8) respectively abut against the first retaining ring (6) and the second retaining ring (7).

4. A filtering ball valve according to claim 1, characterized in that, The elastic sealing ring (4) further comprises: A protective ring portion (45) whose one end close to the valve ball (3) is connected to the first sealing ring portion (41), and the protective ring portion (45) is located inside the elastic ring portion (42).

5. The filtering type ball valve according to claim 1, characterized in that, The valve ball (3) comprises two ports, and a filtering assembly (9) is provided on both ports. The filtering assembly (9) comprises: A support ring (91) provided on the port of the valve ball (3); A filter screen (92) provided inside the support ring (91).

6. The filtering type ball valve according to claim 5, characterized in that The outer peripheral wall of the support ring (91) is threadedly connected to the port of the valve ball (3).

7. A filtering ball valve according to claim 5, characterized in that, A filtering cavity is formed between the two filtering assemblies (9), and a filtering filler (10) is provided in the filtering cavity.

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