CN218971884U

CN218971884U - Wear-resisting scour-resistant anti-blocking structure valve seat

Info

Publication number: CN218971884U
Application number: CN202223075407.XU
Authority: CN
Inventors: 王俊华; 梅鸣; 徐宗策; 柳作; 赵亮; 王志勇
Original assignee: Zhejiang Chaozhong Valves Made Co ltd
Current assignee: Zhejiang Chaozhong Valves Made Co ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-05-05
Anticipated expiration: 2032-11-21

Abstract

The utility model discloses a wear-resistant and scouring-resistant anti-blocking structure valve seat, which comprises a first valve seat, a second valve seat and a ball valve core, wherein movable sealing elements are arranged on two sides of the ball valve core, the two movable sealing elements are respectively positioned in the first valve seat and the second valve seat, each movable sealing element comprises an inner ring, a middle ring, a baffle ring and a spring, the middle ring and the baffle ring are positioned on the outer sides of the inner rings, the middle ring and the baffle ring are closed by a space formed by the inner rings and the first valve seat or the second valve seat, one side of the inner ring is abutted against a ball valve core, an upper containing cavity and a lower containing cavity are formed with the first valve seat and the second valve seat, and a plurality of counter bores are formed on the middle ring.

Description

Wear-resisting scour-resistant anti-blocking structure valve seat

Technical Field

The utility model discloses a wear-resistant scouring-resistant anti-blocking structure valve seat, and belongs to the technical field of valve bodies.

Background

With the continuous development of industry, the demand for ball valves, especially high-temperature and high-pressure severe-working-condition ball valves, is increasing, and the ball valves are required to have the performances of wear resistance, scouring resistance, high temperature resistance, corrosion resistance and the like. While the traditional full-diameter ball valve has the advantages that the ball body and the valve seat are subjected to surface hardening treatment through the technologies of overlaying, spraying and the like, the service life, the cost, the performance and the like of the ball valve still cannot meet the use requirements, and the ball valve is widely applied to industries such as coal-to-liquid, coal chemical industry, petroleum, chemical industry, electric power and metallurgy.

In order to solve the problem of locking of a ball valve core, the sealing rings and springs are usually added to two sides of the ball valve, the sealing rings and the ball valve core keep a dynamic collision state by utilizing compression rebound of the springs, but due to various fluid media conveyed in the ball valve, particularly under the use condition of impurities in the fluid media, when the media are adhered to the inner wall of a valve seat or the surface of the ball valve core, the working of the springs can be greatly influenced, and the tightness of the ball valve core cannot be ensured.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a valve seat with a wear-resistant, scouring-resistant and anti-blocking structure.

The utility model realizes the aim through the following technical scheme, the valve seat with the wear-resistant and scouring-resistant anti-blocking structure comprises a first valve seat, a second valve seat and a ball valve core, wherein movable sealing pieces are arranged on two sides of the ball valve core, the two movable sealing pieces are respectively positioned in the first valve seat and the second valve seat, each movable sealing piece comprises an inner ring, a middle ring, a blocking ring and a spring, the middle ring and the blocking ring are both positioned on the outer side of the inner ring, the two rings are closed by a space formed by the inner ring and the first valve seat or the second valve seat, one side of the inner ring is abutted against the ball valve core, an upper containing cavity and a lower containing cavity are formed with the first valve seat and the second valve seat, a plurality of counter bores are formed in the middle ring, one end of the spring is abutted against the inner wall of the counter bore, the other end of the spring is abutted against the blocking ring, a first rubber ring is arranged between the blocking ring and the inner ring, a second rubber ring is arranged between the middle ring and the inner ring, and an opening is formed in the inner wall of the inner ring, which is close to the ball valve core.

Preferably, the thickness of the first rubber ring is larger than that of the baffle ring.

Preferably, the side of the middle ring, which is contacted with the second rubber ring, is provided with a convex rib with a triangular section.

Preferably, the first valve seat and the second valve seat are provided with flow guide openings in a horn structure, and one end of the inner ring, which is close to the flow guide opening, is provided with a knife edge.

Preferably, the spring arrays are distributed in six, and the depth of the counter bore is half of the thickness of the middle ring.

Compared with the prior art, the utility model has the beneficial effects that:

through setting up the gliding inner ring, fluid pressure variation when utilizing the ball valve to open and close for the inner ring can reciprocating sliding a short distance, not only can reach the effect of pressure release, also can strike off the impurity on first disk seat, second disk seat and ball valve core surface simultaneously, avoids appearing the condition that the spring became invalid and the ball valve core was locked.

Drawings

FIG. 1 is a schematic view of the structure of the present utility model as applied to a floating ball valve;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is an exploded view of the movable seal of the present utility model;

reference numerals: 1. a first valve seat; 2. a diversion port; 3. an upper cavity; 4. a ball valve core; 5. a second valve seat; 6. a lower cavity; 7. a baffle ring; 8. a spring; 9. an intermediate ring; 10. a rib; 11. a second rubber ring; 12. a notch; 13. an inner ring; 14. a first rubber ring; 15. a knife edge; 16. and (5) countersinking.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-3, a valve seat with a wear-resistant, scouring-resistant and anti-blocking structure comprises a first valve seat 1, a second valve seat 5 and a ball valve core 4, wherein movable sealing elements are arranged on two sides of the ball valve core 4, the two movable sealing elements are respectively positioned in the first valve seat 1 and the second valve seat 5, each movable sealing element comprises an inner ring 13, an intermediate ring 9, a baffle ring 7 and a spring 8, the intermediate ring 9 and the baffle ring 7 are both positioned on the outer side of the inner ring 13, the two are closed by a space formed by the inner ring 13 and the first valve seat 1 or the second valve seat 5, one side of the inner ring 13 is in contact with the ball valve core 4, an upper containing cavity 3 and a lower containing cavity 6 are formed with the first valve seat 1 and the second valve seat 5, a plurality of counter bores 16 are formed in the intermediate ring 9, one end of the spring 8 is in contact with the inner wall of the counter bores 16, the other end of the spring 8 is in contact with the baffle ring 7, a first rubber ring 14 is arranged between the baffle ring 7 and the inner ring 13, a second rubber ring 11 is arranged between the intermediate ring 9 and the inner ring 13, and the inner wall close to the ball valve core 4 is provided with an opening 12.

The thickness of the first rubber ring 14 is larger than that of the baffle ring 7, a triangular convex rib 10 is arranged on one side, in contact with the second rubber ring 11, of the middle ring 9, a flow guiding opening 2 in a horn structure is arranged on the first valve seat 1 and the second valve seat 5, a knife edge 15 is arranged at one end, close to the flow guiding opening 2, of the inner ring 13, six springs 8 are distributed in an array mode, and the depth of the counter bore 16 is half of that of the middle ring 9.

Working principle: when the ball valve core 4 is matched with the inner ring 13 to close the fluid circulation state of the first valve seat 1 and the second valve seat 5, the fluid pressure on one side of the ball valve core 4 is increased, the inner ring 13 can be pushed to be far away from the ball valve core 4 and form a gap when reaching a preset value, the ball valve core 4 has a tiny sliding trend, so that the ball valve core is kept in interference fit with the inner ring 13 on the other side to realize sealing, at the moment, fluid can enter the upper containing cavity 3 and the lower containing cavity 6 through the gap to achieve the pressure relief effect, the pressure bearing safety of the floating ball valve is effectively ensured, and when the inner ring 13 slides towards the direction far away from the ball valve core 4, the first rubber ring 14 and the second rubber ring 11 are extruded to deform, so that good sealing effect can be achieved under the high-pressure state of the fluid, the phenomenon that impurities in the fluid enter between the baffle ring 7 and the middle ring 9 to influence the work of the spring 8 is avoided, and the blade edge opening 15 is arranged on the inner ring 13, the sealing effect can be avoided when the sliding, the impurities adhered to the local positions on the surfaces of the first valve seat 1, the second valve seat 5 and the ball valve core 4 are scraped, the situation of poor sealing effect is avoided, and the service life of the device is prolonged.

In addition, because the first rubber is located between the baffle ring 7 and the inner ring 13, when the inner ring 13 slides and is installed, the first rubber can bear the acting force of two faces, so that the deformation degree of the first rubber is larger, the first rubber and the convex rib 10 at the end part of the middle ring 9 squeeze the second rubber ring 11 to be combined, the movable sealing piece can have better sealing effect, the sliding balance of the inner ring 13 and the middle ring 9 can be ensured by symmetrically arranging the springs 8, the compression of the springs 8 is small, the service time can be prolonged, and the resistance of the inner ring 13 to the fluid flow can be reduced by the diversion opening 2.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The utility model provides a wear-resisting resistant structure disk seat that blocks up that erodes, includes first disk seat (1), second disk seat (5) and ball valve core (4), its characterized in that, the both sides of ball valve core (4) all are provided with movable seal, two movable seal is located first disk seat (1) and second disk seat (5) respectively, movable seal includes inner ring (13), intermediate ring (9), keeps off ring (7) and spring (8), intermediate ring (9) and keeps off ring (7) all are located the outside of inner ring (13), and both are closed by the space that inner ring (13) formed with first disk seat (1) or second disk seat (5), one side of inner ring (13) is contradicted with ball valve core (4) to be formed with upper chamber (3) and lower chamber (6) with first disk seat (1) and second disk seat (5), be provided with a plurality of counter bore (16) on intermediate ring (9), the one end of spring (8) is supported at the inner wall (7) of counter bore (16), and the other end is provided with rubber circle (13) between inner ring (14) and second ring (13), the inner ring (13) is provided with a notch (12) near the inner wall of the ball valve core (4).

2. A valve seat with a wear-resistant, scour-resistant and anti-blocking structure according to claim 1, characterized in that the thickness of the first rubber ring (14) is greater than the thickness of the baffle ring (7).

3. A valve seat with a wear-resistant, scour-resistant and anti-clogging structure according to claim 1, characterized in that the side of the intermediate ring (9) in contact with the second rubber ring (11) is provided with a protruding ridge (10) with a triangular cross section.

4. The valve seat with the wear-resistant, scouring-resistant and anti-blocking structure according to claim 1, wherein the first valve seat (1) and the second valve seat (5) are provided with a diversion opening (2) with a horn structure, and one end of the inner ring (13) close to the diversion opening (2) is provided with a knife edge (15).

5. A valve seat with a wear-resistant, scour-resistant and anti-blocking structure according to claim 1, characterized in that six springs (8) are distributed in an array, and the depth of the counter bore (16) is half the thickness of the intermediate ring (9).