Sealing ball valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a sealing ball valve. Comprising a valve body, a valve ball and a wear-resistant sealing assembly, the wear-resistant sealing assembly comprises a wear-resistant sealing ring abutting against the surface of the valve ball, and an inclined face is arranged on the side, back on to the valve ball, of the wear-resistant sealing ring; the elastic pieces are arranged on one side of the limiting ring groove; the elastic gasket is arranged between the wear-resistant sealing ring and the elastic piece, the elastic gasket comprises an inner edge and an outer edge, the elastic piece abuts against the side, opposite to the wear-resistant sealing ring, of the inner edge, and the other side of the inner edge abuts against the inclined plane; the fixing ring is installed in the limiting ring groove, and the outer edge of the elastic gasket is arranged between the fixing ring and the limiting ring groove; the elastic piece enables the abrasion-resistant sealing ring to tightly abut against the valve ball, the sealing effect is improved, the elastic gasket can prevent media from flowing in from the position between the fixing ring and the valve body, the sealing state can be maintained under the condition that the valve ball vibrates, and the elastic gasket is not prone to abrasion and long in service life.

Description

Technical Field

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

[0002] A ball valve mainly includes a valve body, a valve ball disposed in the valve body, and a valve stem disposed on the valve body and connected to the valve ball. By controlling the rotation angle of the valve stem, the rotation angle of the valve ball is controlled, thereby controlling the opening and closing of the ball valve and the flow rate of the flowing medium. In order to prevent medium leakage in the valve closed state, a sealing ring is required to seal between the valve ball and the valve body.

[0003] In the prior art, the sealing ring is directly installed in the valve body. However, after the ball valve is used for a period of time, abrasion will occur between the sealing ring and the surface of the valve ball, affecting the sealing effect. There is also a prior art in which a spring is installed on the side of the sealing ring facing away from the valve ball to improve the sealing effect by the elastic force of the spring, and an elastic sealing ring is installed on the outer peripheral wall of the sealing ring to seal between the sealing ring and the valve body. Since the sealing ring will move axially, the outer peripheral wall of the sealing ring will rub against the valve body, causing abrasion of the elastic sealing ring and affecting the sealing effect. Therefore, the service life of the ball valve is short. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a sealed ball valve for the above-mentioned existing technical problems. The elastic member makes the wear-resistant sealing ring tightly abut against the valve ball to improve the sealing effect. The inner edge of the elastic gasket is pressed on the inclined surface of the wear-resistant sealing ring by the elastic member, and the outer edge of the elastic gasket is pressed between the fixing ring and the limit ring groove. Therefore, the elastic gasket can prevent the medium from flowing in between the fixing ring and the valve body, and can maintain the sealed state even when the valve ball vibrates, and the elastic gasket is not easily worn and has a long service life.

[0005] In view of this, the utility model provides a sealed ball valve, which includes a valve body, a valve ball disposed in the valve body, and a valve stem disposed on the valve body and connected to the valve ball. Two limit ring grooves are axially disposed in the valve body on both sides of the valve ball, and a wear-resistant sealing assembly abutting against the surface of the valve ball is axially disposed in the limit ring groove. The wear-resistant sealing assembly includes:

[0006] A wear-resistant sealing ring abutting against the surface of the valve ball, and an inclined surface is disposed on the side of the wear-resistant sealing ring facing away from the valve ball;

[0007] A plurality of elastic members disposed on one side of the limit ring groove;

[0008] An elastic gasket disposed between the wear-resistant sealing ring and the elastic member. The elastic gasket includes an inner edge and an outer edge. The elastic member abuts against the side of the inner edge facing away from the wear-resistant sealing ring, and the other side of the inner edge abuts against the inclined surface;

[0009] The fixed ring is installed in the limit ring groove by means of a plurality of screws, and the fixed ring is sleeved on the outer peripheral wall of the wear-resistant sealing ring. The outer edge of the elastic gasket is arranged between the fixed ring and the limit ring groove.

[0010] In the above solution, further, an arc-shaped ring surface is provided on one side of the fixed ring close to the outer edge of the elastic gasket, and an arc-shaped ring surface is also provided on one side of the limit ring groove close to the outer edge of the elastic gasket.

[0011] In the above solution, further, a positioning ring groove is opened on one side of the limit ring groove close to the elastic gasket, an installation ring is arranged in the positioning ring groove, and the plurality of elastic members are installed on the installation ring.

[0012] In the above solution, further, the elastic member is a spring, a plurality of grooves are provided on the installation ring, and the spring is arranged in the groove.

[0013] In the above solution, further, an elastic sealing ring is provided on the side of the fixed ring facing away from the valve ball, and the elastic sealing ring abuts against the surface of the limit ring groove.

[0014] In the above solution, further, the valve body includes a water inlet and a water outlet, a filter cartridge assembly is arranged in the valve body, and one end of the filter cartridge assembly is arranged on the positioning ring groove close to the water inlet side.

[0015] In the above solution, further, the filter cartridge assembly includes:

[0016] A barrel body, which is a cylindrical structure formed by continuously folding in a Z shape, and the barrel body is in a frustum shape. One end of the barrel body is arranged on the limit ring groove close to the water inlet side;

[0017] A barrel bottom, which is arranged at the other end of the barrel body;

[0018] Two support rings, which are respectively arranged at both ends of the barrel body.

[0019] The beneficial effects of the present utility model are:

[0020] 1. The elastic member makes the wear-resistant sealing ring tightly abut against the valve ball, improving the sealing effect. The inner edge of the elastic gasket is pressed by the elastic member on the inclined surface of the wear-resistant sealing ring, and the outer edge of the elastic gasket is pressed between the fixed ring and the limit ring groove. Therefore, the elastic gasket can prevent the medium from flowing in between the fixed ring and the valve body, and can also maintain the sealing state under the vibration of the valve ball. Moreover, the elastic gasket is not easily worn and has a long service life;

[0021] 2. The filter cartridge assembly filters impurities, improves the quality of the medium, and can also prevent impurities from accumulating between the wear-resistant sealing ring and the valve ball, causing wear of the wear-resistant sealing ring and the valve ball and affecting the sealing performance;

[0022] 3. The cylindrical body is continuously Z-folded to form a cylindrical structure, and the cylindrical body has a frustum-shaped structure, which can increase the filtration area and improve the filtration speed. Description of the Drawings

[0023] Figure 1 is a schematic cross-sectional structure diagram of the present utility model;

[0024] Figure 2 is of the present utility model Figure 2 schematic structure diagram at A;

[0025] Figure 3 is a schematic structure diagram of the filter cartridge assembly of the present utility model;

[0026] Figure 4 is a schematic cross-sectional structure diagram of the filter cartridge assembly of the present utility model.

[0027] The markings in the figures are indicated as:

[0028] 1. Valve body; 2. Valve ball; 3. Limiting ring groove; 4. Wear-resistant sealing assembly; 5. Wear-resistant sealing ring; 6. Elastic member; 7. Elastic gasket; 71. Inner edge; 72. Outer edge; 8. Fixed ring; 9. Inclined surface; 10. Arc-shaped ring surface; 11. Positioning ring groove; 12. Installation ring; 13. Groove; 14. Elastic sealing ring; 15. Filter cartridge assembly; 151. Cylindrical body; 152. Bottom of the cylinder; 153. Support ring; 16. Water inlet; 17. Water outlet. Detailed Embodiments

[0029] 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 of 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 of protection of the present application.

[0030] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present application. For the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art 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 construed as merely exemplary and not 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.

[0031] Example 1:

[0032] This embodiment provides a sealed ball valve, which includes a valve body 1, a valve ball 2 disposed inside the valve body 1, and a valve stem disposed on the valve body 1 and connected to the valve ball 2. Two limiting ring grooves 3 are respectively disposed on both sides of the valve ball 2 inside the valve body 1. An abrasion-resistant sealing assembly 4 that abuts against the surface of the valve ball 2 is axially disposed in the limiting ring groove 3. The abrasion-resistant sealing assembly 4 includes:

[0033] An abrasion-resistant sealing ring 5 that abuts against the surface of the valve ball 2. An inclined surface 9 is disposed on the side of the abrasion-resistant sealing ring 5 facing away from the valve ball 2;

[0034] A plurality of elastic members 6 are disposed on one side of the limiting ring groove 3;

[0035] An elastic gasket 7 is disposed between the abrasion-resistant sealing ring 5 and the elastic members 6. The elastic gasket 7 includes an inner edge 71 and an outer edge 72. The elastic members 6 abut against the side of the inner edge 71 facing away from the abrasion-resistant sealing ring 5, and the other side of the inner edge 71 abuts against the inclined surface 9;

[0036] A fixing ring 8 is installed in the limiting ring groove 3 by a plurality of screws, and the fixing ring 8 is sleeved on the outer peripheral wall of the abrasion-resistant sealing ring 5. The outer edge 72 of the elastic gasket 7 is disposed between the fixing ring 8 and the limiting ring groove 3.

[0037] In this technical solution, the valve ball 2 can be installed into the valve body 1 from the side. By rotating the valve stem to drive the valve ball 2 to rotate, the opening and closing of the ball valve can be controlled. A handle or an electric actuator can be disposed on the valve stem to drive the handle to rotate.

[0038] A through hole communicating with the valve body 1 is disposed on the valve ball 2, and the medium can flow through the through hole. The valve ball 2 can be made of a metal material, and a wear-resistant coating, such as a tungsten carbide coating, can be applied to the surface of the valve ball 2. Tungsten carbide is a very hard ceramic material with excellent properties such as high melting point, high hardness, high wear resistance, and high corrosion resistance. Making a tungsten carbide material into a coating and applying it to the surface of the metal valve ball 2 can improve the hardness, wear resistance, corrosion resistance, and high-temperature resistance of the surface of the valve ball 2, thereby reducing the reduction of the sealing effect caused by the wear of the valve ball 2.

[0039] The abrasion-resistant sealing assembly 4 is used to seal between the valve ball 2 and the valve body 1 to prevent the medium from leaking. Among them, the abrasion-resistant sealing ring 5, the elastic members 6, the fixing ring 8, and the elastic gasket 7 can all be made of a metal material. A tungsten carbide coating can also be applied to the surface of the abrasion-resistant sealing ring 5 to improve its wear resistance and extend its service life.

[0040] The elastic member 6 has an elastic effect. After the wear-resistant sealing ring 5 and the valve ball 2 are sequentially installed in the valve body 1, the elastic member 6 is compressed. Under the action of the elastic force of the elastic member 6, the wear-resistant sealing ring 5 is pressed against the valve ball 2, so that the wear-resistant sealing ring 5 tightly abuts against the surface of the valve ball 2, thereby improving the sealing effect. Even when the wear-resistant sealing ring 5 is worn, the wear-resistant sealing ring 5 still abuts against the valve ball 2 under the action of the elastic force of the elastic member 6, thus ensuring the sealing effect and extending the service life.

[0041] The elastic gasket 7 is a circular metal sheet, and when an external force is applied to it, it can deform.

[0042] Under the action of the elastic force of the elastic member 6, the inner edge 71 of the elastic gasket 7 is pressed against the inclined surface 9, so that a seal is formed between the inner edge 71 of the elastic gasket 7 and the wear-resistant sealing ring 5; the fixing ring 8 is installed in the limit ring groove 3 by a plurality of screws, and the outer edge 72 of the elastic gasket 7 is pressed between the fixing ring 8 and the limit ring groove 3, so that a seal is formed between the outer edge 72 of the elastic gasket 7 and the valve body 1. Therefore, the elastic gasket 7 can prevent the medium from flowing into the gap between the fixing ring 8 and the valve body 1.

[0043] When the valve ball 2 is impacted by high-pressure medium, the valve ball 2 will generate slight vibration. The elastic member 6 on one side of the valve ball 2 is further compressed, and the inner edge 71 of the elastic gasket 7 moves away from the valve ball 2, increasing the contact area between the elastic gasket 7 and the inclined surface 9; the elastic member 6 on the other side will elongate, and ensure that the wear-resistant sealing ring 5 abuts against the valve ball 2, while the contact area between the elastic gasket 7 and the inclined surface 9 decreases. Therefore, the utility model can maintain the sealing state even when the valve ball 2 vibrates, and the elastic gasket 7 is not easily worn and has a long service life.

[0044] Furthermore, an arc-shaped ring surface 10 is provided on one side of the fixing ring 8 close to the outer edge 72 of the elastic gasket 7, and an arc-shaped ring surface 10 is also provided on one side of the limit ring groove 3 close to the outer edge 72 of the elastic gasket 7.

[0045] In this technical solution, when the elastic gasket 7 deforms by tilting towards one side, the arc-shaped ring surface 10 can disperse stress. When the wear-resistant sealing ring 5 moves away from the valve ball 2, the outer edge 72 of the elastic gasket 7 contacts the arc-shaped ring surface 10 on the limit ring groove 3; when the wear-resistant sealing ring 5 moves towards the valve ball 2, the outer edge 72 of the elastic gasket 7 contacts the arc-shaped ring surface 10 on the fixing ring 8.

[0046] Furthermore, the elastic member 6 is a spring, and a plurality of grooves 13 are provided on the mounting ring 12, and the spring is arranged in the grooves 13.

[0047] In this technical solution, the grooves 13 are used to position the spring, and the spring has the advantages of low cost and strong stability.

[0048] Further, an elastic sealing ring 14 is provided on one side of the fixed ring 8 facing away from the valve ball 2, and the elastic sealing ring 14 abuts against the surface of the limiting ring groove 3.

[0049] In this technical solution, the elastic sealing ring 14 abuts against the surface of the limiting ring groove 3, which can prevent the elastic sealing ring from being rubbed and improve the service life of the elastic sealing ring. The elastic sealing ring 14 can be made of rubber material, and the elastic sealing ring 14 is used to seal between the fixed ring 8 and the limiting ring groove 3 to prevent the medium from leaking from the gap between the fixed ring 8 and the limiting ring groove 3.

[0050] Embodiment 2:

[0051] This embodiment provides a sealed ball valve, which, in addition to including the technical solutions of the above embodiments, further has the following technical features.

[0052] A positioning ring groove 11 is formed on one side of the limiting ring groove 3 close to the elastic gasket 7. An installation ring 12 is arranged in the positioning ring groove 11, and the plurality of elastic members 6 are installed on the installation ring 12.

[0053] In this technical solution, when installing the spring, the spring can be first installed on the installation ring 12, and then the installation ring 12 is installed in the positioning ring groove 11, which has the effect of facilitating installation.

[0054] Embodiment 3:

[0055] This embodiment provides a sealed ball valve, which, in addition to including the technical solutions of the above embodiments, further has the following technical features.

[0056] The valve body 1 includes a water inlet 16 and a water outlet 17. A filter cartridge assembly 15 is arranged in the valve body 1, and one end of the filter cartridge assembly 15 is arranged on the positioning ring groove 11 close to the water inlet 16 side.

[0057] In this technical solution, the filter cartridge assembly 15 can be a cylindrical structure made of a metal filter screen. When the medium enters from the water inlet 16, the impurities in the medium adhere to the inside of the filter cartridge assembly 15, and the filtered medium passes through the valve ball 2 and is discharged from the water outlet 17.

[0058] When installing the filter cartridge assembly 15, its open end is first installed in the positioning ring groove 11, and then the installation ring 12 is installed, and it is fixed by the installation ring 12, which has the effect of facilitating installation.

[0059] The filter cartridge assembly 15 filters impurities, improves the quality of the medium, and at the same time can also prevent impurities from accumulating between the wear-resistant sealing ring 5 and the valve ball 2, causing wear of the wear-resistant sealing ring 5 and the valve ball 2 and affecting the sealing performance.

[0060] Embodiment 4:

[0061] This embodiment provides a sealed ball valve. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0062] The filter cartridge assembly 15 includes:

[0063] A barrel body 151, which is a cylindrical structure formed by continuously folding in a Z shape, and the barrel body 151 has a frustum shape. One end of the barrel body 151 is arranged on the limiting ring groove 3 close to the water inlet 16 side;

[0064] A barrel bottom 152, which is arranged on the other end of the barrel body 151;

[0065] Two support rings 153, which are respectively arranged at both ends of the barrel body 151.

[0066] In this technical solution, both the barrel body 151 and the barrel bottom 152 can be made of a metal filter mesh. The barrel body 151 has a frustum shape, and the end with a larger diameter is installed on the valve body 1, and the barrel bottom 152 is installed on the end with a smaller diameter of the barrel body 151.

[0067] By continuously folding the barrel body 151 in a Z shape to form a cylindrical structure, and the barrel body 151 has a frustum shape, it can increase the filtering area and improve the filtering speed.

[0068] An annular groove is provided on the support ring 153, and the head end and the tail end of the barrel body 151 can be inserted into the annular groove. The support ring 153 is used to strengthen the structural strength of the barrel body 151, and thus strengthen the structural strength of the filter cartridge assembly 15 and improve the service life.

[0069] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and the features in the embodiments in 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 only 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 sealed ball valve, characterized in that: The invention comprises a valve body (1), a valve ball (2) arranged in the valve body (1), and a valve stem arranged on the valve body (1) and connected to the valve ball (2); the valve body (1) is provided with two limiting ring grooves (3) respectively located on both sides of the valve ball (2); a wear-resistant sealing component (4) is axially arranged in the limiting ring groove (3) and abuts against the surface of the valve ball (2); the wear-resistant sealing component (4) comprises: A wear-resistant sealing ring (5) contacts the surface of the valve ball (2), and an inclined surface (9) is provided on the side of the wear-resistant sealing ring (5) facing away from the valve ball (2); A plurality of elastic members (6) are arranged on one side of the limiting ring groove (3); An elastic gasket (7) is arranged between the wear-resistant sealing ring (5) and the elastic member (6), the elastic gasket (7) comprising an inner edge (71) and an outer edge (72), the elastic member (6) abuts against a side of the inner edge (71) facing away from the wear-resistant sealing ring (5), and the other side of the inner edge (71) abuts against the inclined surface (9); The fixing ring (8) is installed in the limiting ring groove (3) by means of a plurality of screws, and the fixing ring (8) is sleeved on the outer peripheral wall of the wear-resistant sealing ring (5), and the outer edge (72) of the elastic gasket (7) is arranged between the fixing ring (8) and the limiting ring groove (3).

2. A sealed ball valve according to claim 1, characterized in that: The fixing ring (8) is provided with an arcuate annular surface (10) on one side close to the outer edge (72) of the elastic gasket (7), and the limiting ring groove (3) is also provided with an arcuate annular surface (10) on one side close to the outer edge (72) of the elastic gasket (7).

3. A sealed ball valve according to claim 1, characterized in that: A positioning ring groove (11) is provided on one side of the limiting ring groove (3) close to the elastic gasket (7), a mounting ring (12) is provided in the positioning ring groove (11), and the plurality of elastic members (6) are mounted on the mounting ring (12).

4. A sealed ball valve according to claim 3, characterized in that: The elastic member (6) is a spring, a plurality of grooves (13) are provided on the mounting ring (12), and the springs are arranged in the grooves (13).

5. A sealed ball valve according to claim 1, characterized in that: An elastic sealing ring (14) is provided on the side of the fixing ring (8) facing away from the valve ball (2), and the elastic sealing ring (14) contacts the surface of the limiting ring groove (3).

6. A sealed ball valve according to claim 3, characterized in that: The valve body (1) comprises a water inlet (16) and a water outlet (17), a filter cartridge assembly (15) is arranged inside the valve body (1), and one end of the filter cartridge assembly (15) is arranged on a positioning ring groove (11) close to the water inlet (16).

7. A sealed ball valve according to claim 6, characterized in that: The filter cartridge assembly (15) comprises: The cylinder body (151) is a cylindrical structure formed by continuous Z-shaped folding, and the cylinder body (151) is a truncated cone structure, and one end of the cylinder body (151) is arranged on a limiting ring groove (3) close to a side of the water inlet (16); The cylinder bottom (152) is arranged on the other end of the cylinder body (151); Two support rings (153) are respectively arranged at two ends of the cylinder body (151).

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