High-temperature-resistant sealing valve seat

Abstract

The utility model belongs to the technical field of valve seats, and particularly relates to a high-temperature-resistant sealing valve seat. Comprising a first sealing ring; a positioning ring groove is formed in the side, close to the first sealing ring, of the second sealing ring; the third sealing ring is arranged in the positioning ring groove; a first limiting ring groove is formed in the inner circumferential wall of the third sealing ring, a first sealing part abutting against the first sealing ring and a second sealing part abutting against the second sealing ring are formed in the inner circumferential wall of the third sealing ring, a second limiting ring groove is formed in one side of the third sealing ring, and a third sealing part is arranged on the outer circumferential wall of the second limiting ring groove. A first elastic ring is arranged in the first limiting ring groove, and a second elastic ring is arranged in the second limiting ring groove; the first elastic ring generates elastic deformation through surface abrasion of the valve ball sealing part, the first elastic ring applies pressure to the first sealing ring, the surface of the valve ball sealing part is kept abutting against the surface of the valve ball, the sealing effect is improved, and the service life of the first sealing ring is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve seats, and in particular relates to a high-temperature resistant sealing valve seat. Background Art

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters of the conveyed medium. According to their functions, they can be divided into ball valves, check valves, regulating valves, etc. The valve seat is crucial to the sealing effect of the valve. Among them, the ball valve mainly includes a valve ball, a valve body, a valve stem and a valve seat. The ball valve has a sealing effect through the contact between the valve ball and the valve seat, which can prevent the leakage of the medium.

[0003] In the prior art, the valve seat is an annular structure, and a contact surface is provided on the valve seat, which contacts the surface of the valve ball. When the ball valve is working, friction is easily generated between the valve seat and the contact surface of the valve ball during the switching process of the ball valve, causing wear of the valve seat, reducing its sealing effect, causing medium leakage, and reducing the performance and life of the valve. Utility Model Content

[0004] The purpose of the utility model is to provide a high-temperature resistant sealing valve seat in response to the above-mentioned technical problems. The first elastic ring is elastically deformed by the wear of the surface of the valve ball sealing part. The first elastic ring applies pressure to the first sealing ring to keep the surface of the valve ball sealing part in contact with the surface of the valve ball, thereby further improving the sealing effect and extending the service life of the first sealing ring.

[0005] In view of this, the utility model provides a high temperature resistant sealing valve seat, comprising:

[0006] A first sealing ring, wherein a valve ball sealing portion is disposed on one side of the first sealing ring;

[0007] A second sealing ring is arranged on a side of the first sealing ring away from the valve ball sealing portion, the second sealing ring has an L-shaped cross section, and a positioning ring groove is formed on a side close to the first sealing ring;

[0008] A third sealing ring is arranged in the positioning ring groove;

[0009] Among them, the inner circumferential wall of the third sealing ring is provided with a first limiting ring groove, and a first sealing portion that contacts the first sealing ring and a second sealing portion that contacts the second sealing ring are respectively formed, a second limiting ring groove is provided on one side of the third sealing ring, the second limiting ring groove is located on the outer side of the first limiting ring groove, and the outer circumferential wall of the second limiting ring groove is provided with a third sealing portion, a first elastic ring is provided in the first limiting ring groove, a second elastic ring is provided in the second limiting ring groove, and a deformation gap is provided between the first sealing ring and the second sealing ring.

[0010] In the above solution, further, the outer peripheral wall of the third sealing portion is provided with a first arc-shaped convex ring.

[0011] In the above solution, further, the first sealing portion is provided with a second arc-shaped convex ring that contacts the first sealing ring, and the second sealing portion is also provided with a second arc-shaped convex ring that contacts the second sealing ring.

[0012] In the above solution, further, an arc-shaped contact surface is provided on the valve ball sealing portion.

[0013] In the above solution, further, a first supporting ring is provided on the first sealing ring.

[0014] In the above solution, further, a second supporting ring is arranged inside the second sealing ring.

[0015] The beneficial effects of the utility model are:

[0016] 1. The first elastic ring is elastically deformed by the wear of the valve ball sealing surface. The first elastic ring applies pressure to the first sealing ring to keep the valve ball sealing surface in contact with the valve ball surface, thereby further improving the sealing effect and extending the service life of the first sealing ring;

[0017] 2. The arc-shaped contact surface can further increase the sealing performance between the first sealing ring and the surface of the valve ball. The arc-shaped contact surface can also reduce the contact area between the valve ball sealing part and the valve ball, reduce the friction force, thereby reducing the degree of wear and extending the service life of the first sealing ring;

[0018] 3. The first support ring is used to increase the structural strength of the first sealing ring, which can effectively prevent the first sealing ring from being deformed due to the impact of the high-pressure medium, thereby improving the sealing stability of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0022] Figure 4 The utility model Figure 3 Schematic diagram of the structure at A.

[0023] The symbols in the figure are:

[0024] 1. First sealing ring; 11. Valve ball sealing part; 2. Second sealing ring; 3. Third sealing ring; 31. First sealing part; 32. Second sealing part; 33. Third sealing part; 34. First elastic ring; 35. Second elastic ring; 4. Positioning ring groove; 5. First limiting ring groove; 6. Second limiting ring groove; 7. Deformation gap; 8. First arcuate convex ring; 9. Second arcuate convex ring; 10. Arc-shaped contact surface; 12. Inclined surface; 13. First support ring; 14. Second support ring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0026] 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 according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all 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 numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0027] Embodiment 1:

[0028] This embodiment provides a high temperature resistant sealing valve seat, comprising:

[0029] 1. A high temperature resistant sealing valve seat, characterized by comprising:

[0030] A first sealing ring 1, wherein a valve ball sealing portion 11 is provided on one side of the first sealing ring 1;

[0031] The second sealing ring 2 is arranged on the side of the first sealing ring 1 away from the valve ball sealing portion 11. The cross section of the second sealing ring 2 is L-shaped, and a positioning ring groove 4 is formed on the side close to the first sealing ring 1;

[0032] A third sealing ring 3 is arranged in the positioning ring groove 4;

[0033] Among them, the inner circumferential wall of the third sealing ring 3 is provided with a first limiting ring groove 5, and a first sealing portion 31 that contacts the first sealing ring 1 and a second sealing portion 32 that contacts the second sealing ring 2 are respectively formed, a second limiting ring groove 6 is provided on one side of the third sealing ring 3, the second limiting ring groove 6 is located on the outer side of the first limiting ring groove 5, and a third sealing portion 33 is provided on the outer circumferential wall of the second limiting ring groove 6, a first elastic ring 34 is provided in the first limiting ring groove 5, a second elastic ring 35 is provided in the second limiting ring groove 6, and a deformation gap 7 is provided between the first sealing ring 1 and the second sealing ring 2.

[0034] In the present technical solution, the first sealing ring 1, the second sealing ring 2 and the third sealing ring 3 can all be made of plastic materials, such as polytetrafluoroethylene. Polytetrafluoroethylene has excellent heat resistance and cold resistance, can be used for a long time at -180 to 260°C, and is also resistant to acids and alkalis, and various organic solvents, and is almost insoluble in all solvents.

[0035] The first limiting ring groove 5 may be an arc-shaped groove. The first limiting ring groove 5 is provided to make the third sealing ring 3 elastic, so that the first limiting ring groove 5 can be opened and closed under radial force.

[0036] The second limiting ring groove 6 may be an arc-shaped groove, the groove opening of which may face the first sealing ring 1 or the second sealing ring 2. The second limiting ring groove 6 is provided to make the third sealing ring 3 elastic, so that the second limiting ring groove 6 can be opened and closed under axial force.

[0037] The first elastic ring 34 and the second elastic ring 35 can both be made of metal, such as stainless steel. The diameter of the first elastic ring 34 is larger than that of the second elastic ring 35. The cross-section of the first elastic ring 34 and the second elastic ring can be circular. The cross-section of the first elastic ring 34 can also be U-shaped, so the first elastic ring 34 and the second elastic ring 35 are elastic.

[0038] When in use, install the third sealing ring 3 into the positioning ring groove 4, install the second sealing ring 2 into the valve seat mounting groove of the ball valve, and then install the first sealing ring 1, keep the valve ball sealing part 11 of the first sealing ring 1 in contact with the valve ball surface, keep the outer peripheral wall of the third sealing part 33 in contact with the surface of the valve seat mounting groove, and the first elastic ring 34 and the second elastic ring 35 in a compressed state, so that the valve ball and the first sealing ring 1, the first sealing ring 1 and the third sealing ring 3, the second sealing ring 2 and the third sealing ring 3, and the valve seat mounting groove surface and the third sealing ring 3 are in close contact, thereby improving the sealing effect.

[0039] When the medium flows through the ball valve, the valve ball sealing part 11 seals between the valve ball and the first sealing ring 1; the first sealing part 31 seals between the first sealing ring 1 and the third sealing ring 3; the second sealing part 32 seals between the second sealing ring 2 and the third sealing ring 3; the third sealing part 33 seals between the surface of the valve seat mounting groove and the third sealing ring 3, thereby achieving the effect of preventing medium leakage.

[0040] When the service life is long, the valve ball sealing part 11 of the first sealing ring 1 and the valve ball are rubbed for a long time, causing the surface of the valve ball sealing part 11 to be worn, and the first elastic ring 34 produces elastic deformation, and the radial width of the first elastic ring 34 and the first limiting ring groove 5 increases, so as to apply pressure to the first sealing ring 1, and keep the surface of the valve ball sealing part 11 in contact with the surface of the valve ball, thereby further improving the sealing effect and reducing the frequency of maintenance and replacement of the valve seat due to sealing failure, thereby improving the reliability and durability of the ball valve and extending the service life of the first sealing ring 1.

[0041] When the medium impacts the valve ball, the valve ball will deviate and vibrate slightly. At this time, the first elastic ring 34 on one side of the valve ball is compressed, and the first elastic ring 34 on the other side is expanded, thereby ensuring that the valve ball can still maintain a strong sealing effect in the case of slight deviation and vibration.

[0042] Embodiment 2:

[0043] This embodiment provides a high temperature resistant sealing valve seat, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0044] The outer peripheral wall of the third sealing portion 33 is provided with a first arc-shaped convex ring 8 .

[0045] In the present technical solution, the first arcuate convex ring 8 has an arcuate surface, and the first arcuate convex ring 8 abuts against the surface of the valve seat mounting groove to further increase the sealing performance.

[0046] Furthermore, the first sealing portion 31 is provided with a second arc-shaped convex ring 9 which abuts against the first sealing ring 1 , and the second sealing portion 32 is also provided with a second arc-shaped convex ring 9 which abuts against the second sealing ring 2 .

[0047] In the present technical solution, the second arc-shaped convex ring 9 has an arc-shaped surface for further improving the sealing performance.

[0048] Furthermore, an arc-shaped contact surface 10 is provided on the valve ball sealing portion 11 .

[0049] In the present technical solution, the arc-shaped contact surface 10 can further increase the sealing performance between the first sealing ring 1 and the surface of the valve ball.

[0050] The arc-shaped contact surface 10 can also reduce the contact area between the valve ball sealing portion 11 and the valve ball, reduce friction, thereby reducing the degree of wear and extending the service life of the first sealing ring 1.

[0051] Embodiment 3:

[0052] This embodiment provides a high temperature resistant sealing valve seat, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0053] A first supporting ring 13 is arranged on the first sealing ring 1 .

[0054] In the present technical solution, the cross-section of the first support ring 13 can be I-shaped, T-shaped and H-shaped. The first support ring 13 is made of metal, such as stainless steel. The first support ring 13 is used to increase the structural strength of the first sealing ring 1, and can effectively prevent the first sealing ring 1 from being deformed due to the impact of high-pressure medium, thereby maintaining the shape and functional integrity of the sealing ring, thereby improving the sealing stability of the ball valve.

[0055] Furthermore, a second supporting ring 14 is disposed inside the second sealing ring 2 .

[0056] In the present technical solution, the cross-section of the second support ring 14 can be I-shaped, T-shaped and H-shaped. The second support ring 14 is made of metal, such as stainless steel. The second support ring 14 is used to increase the structural strength of the second sealing ring 2, and can effectively prevent the second sealing ring 2 from being deformed due to the impact of high-pressure medium, thereby maintaining the shape and functional integrity of the sealing ring, thereby improving the sealing stability of the ball valve.

[0057] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A high temperature resistant sealing valve seat, characterized in that: include: A first sealing ring (1), wherein a valve ball sealing portion (11) is provided on one side of the first sealing ring (1); A second sealing ring (2) is arranged on a side of the first sealing ring (1) away from the valve ball sealing portion (11); the second sealing ring (2) has an L-shaped cross section and is provided with a positioning ring groove (4) on a side close to the first sealing ring (1); A third sealing ring (3) is arranged in the positioning ring groove (4); The inner peripheral wall of the third sealing ring (3) is provided with a first limiting ring groove (5), and a first sealing portion (31) abutting against the first sealing ring (1) and a second sealing portion (32) abutting against the second sealing ring (2) are formed respectively; a second limiting ring groove (6) is provided on one side of the third sealing ring (3); the second limiting ring groove (6) is located on the outer side of the first limiting ring groove (5); a third sealing portion (33) is provided on the outer peripheral wall of the second limiting ring groove (6); a first elastic ring (34) is provided in the first limiting ring groove (5); a second elastic ring (35) is provided in the second limiting ring groove (6); and a deformation gap (7) is provided between the first sealing ring (1) and the second sealing ring (2).

2. A high temperature resistant sealing valve seat according to claim 1, characterized in that: The outer peripheral wall of the third sealing portion (33) is provided with a first arc-shaped convex ring (8).

3. The high temperature resistant sealing valve seat according to claim 1, characterized in that: The first sealing portion (31) is provided with a second arc-shaped convex ring (9) which abuts against the first sealing ring (1), and the second sealing portion (32) is also provided with a second arc-shaped convex ring (9) which abuts against the second sealing ring (2).

4. The high temperature resistant sealing valve seat according to claim 1, characterized in that: The valve ball sealing portion (11) is provided with an arc-shaped contact surface (10).

5. The high temperature resistant sealing valve seat according to claim 1, characterized in that: A first supporting ring (13) is arranged on the first sealing ring (1).

6. The high temperature resistant sealing valve seat according to claim 1, characterized in that: A second supporting ring (14) is arranged inside the second sealing ring (2).

Images