Elastic valve seat of high-performance metal hard sealing ball valve

Abstract

A high-performance metal hard sealing ball valve elastic valve seat comprises a valve body, a ball body and an elastic valve seat body, a first step, a second step and a third step are sequentially arranged on the surface of the inner wall of the valve body, a bearing is arranged between the first step and the ball body and connected with the first step and the ball body in a pressing mode, and a boss structure is arranged on the side, close to the ball body, of the elastic valve seat body. A transverse blind hole is formed in the boss structure, a first reset spring is arranged in the transverse blind hole, and one end of the first reset spring abuts against the end face of the side face of the second step. The ball valve has the advantages that the longitudinal reset spring and the transverse reset spring are arranged on the valve seat, so that the direction of sealing force applied to the ball body by the valve seat tends to be vertical, and the ball valve can still keep good sealing performance even in a wear state.

Description

Technical Field

[0001] The utility model belongs to the field of machine tool equipment, in particular to a high-performance metal hard-sealed ball valve elastic valve seat. Background Art

[0002] The ball valve is a commonly used valve that controls the flow of fluid through a rotating ball. When the ball is aligned with the pipeline axis, the fluid can pass through; when the ball is rotated 90 degrees and perpendicular to the pipeline axis, the fluid is blocked. This design allows the ball valve to have fast switching and good sealing performance.

[0003] After long-term use, the ball surface of the ball valve wears, which increases the gap between the ball and the valve seat, reduces the sealing performance between the valve seat and the ball, and gradually leads to problems such as loose sealing of the ball valve. In addition, the liquid medium flowing through the ball valve often contains a small amount of solid particles, which adhere to the surface of the ball and increase the degree of wear on the ball and the valve seat when rotating. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a high-performance metal hard-sealed ball valve elastic valve seat, which can provide better sealing for the ball valve used for a long time, keep the spherical surface of the ball clean, and extend the service life of the ball valve.

[0005] A high-performance metal hard-sealed ball valve elastic valve seat comprises a valve body, a ball, and an elastic valve seat. The inner wall surface of the valve body is provided with a first step, a second step, and a third step in sequence. A bearing is provided between the first step and the ball. The bearing is crimped with the first step and the ball respectively. A boss structure is provided on the side of the elastic valve seat close to the ball. A transverse blind hole is provided in the boss structure. A first return spring is provided in the transverse blind hole. One end of the first return spring rests on the end face of the side of the second step.

[0006] Furthermore, a longitudinal blind hole is provided in the boss structure, a second return spring is provided in the longitudinal blind hole, and one end of the second return spring rests on the end surface of the upper end of the second step.

[0007] Furthermore, a rubber scraper is provided on the end surface of the boss structure close to the sphere, and a cleaning head is provided at one end of the rubber scraper, and the cleaning head is against the surface of the sphere.

[0008] Furthermore, a fixing plate is provided on the end surface of the rubber scraper close to the sphere, and the fixing plate fixes the rubber scraper to the boss structure through bolts.

[0009] Furthermore, the cleaning head has a triangular cross section, and the angle between the top of the cleaning head and the surface of the sphere is 15° to 30°.

[0010] Furthermore, the transverse blind holes and the longitudinal blind holes are arranged at equal angles.

[0011] Furthermore, the included angle between two adjacent transverse blind holes and the longitudinal blind hole is 30°.

[0012] Furthermore, a plurality of reinforcing ribs are provided on the surfaces of both sides of the cleaning head.

[0013] The utility model is beneficial in that:

[0014] 1. The valve seat is equipped with longitudinal and transverse return springs, so that the sealing force applied by the valve seat to the ball is more vertical, so that the ball valve can still maintain good sealing even in a worn state.

[0015] 2. A rubber scraper is added to the valve seat to clean the solid particles attached to the surface of the ball, which can prevent the solid particles in the liquid medium from adhering to the surface of the ball, thereby preventing the solid particles from damaging the ball and the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a partial cross-sectional schematic diagram of the elastic valve seat of the high-performance metal hard-sealed ball valve of the utility model.

[0017] Figure 2 It is a partial cross-sectional schematic diagram of the elastic valve seat of the high-performance metal hard-sealed ball valve of the utility model.

[0018] Figure 3 It is a partial schematic diagram of the elastic valve seat in the elastic valve seat of the high-performance metal hard-sealed ball valve of the utility model.

[0019] Figure 4 The utility model is a schematic diagram of the structure of the rubber scraper in the elastic valve seat of the high-performance metal hard-sealed ball valve.

[0020] Reference numerals: valve body 1 , ball 2 , valve seat 3 , first return spring 4 , fixing plate 5 , rubber scraper 6 , second return spring 7 , cleaning head 8 , reinforcing rib 9 . DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present utility model will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0022] The high-performance metal hard-sealed ball valve elastic valve seat comprises a valve body, a ball, and an elastic valve seat. The inner wall surface of the valve body is provided with a first step, a second step, and a third step in sequence. A bearing is provided between the first step and the ball, and the bearing is crimped with the first step and the ball respectively. A boss structure is provided on the side of the elastic valve seat close to the ball, and a transverse blind hole is provided in the boss structure. A first return spring is provided in the transverse blind hole, and one end of the first return spring is against the end surface of the side of the second step. A longitudinal blind hole is also provided in the boss structure, and a second return spring is provided in the longitudinal blind hole, and one end of the second return spring is against the end surface of the upper end of the second step. A longitudinal blind hole is also provided in the boss structure, and a second return spring is provided in the longitudinal blind hole, and one end of the second return spring is against the end surface of the upper end of the second step. A rubber scraper is also provided on the end surface of the boss structure close to the ball, and a cleaning head is provided at one end of the rubber scraper, and the cleaning head is against the surface of the ball. A fixing plate is provided on the end surface of the rubber scraper close to the ball, and the fixing plate fixes the rubber scraper to the boss structure by bolts. The cleaning head has a triangular cross section, and the angle between its top and the surface of the sphere is 15° to 30°. The transverse blind holes and the longitudinal blind holes are arranged at equal angles. The angle between two adjacent transverse blind holes and the longitudinal blind holes is 30°. A number of reinforcing ribs are arranged on both sides of the cleaning head.

[0023] The actual use process is as follows: a first return spring is arranged on the side of the valve seat, and a second return spring is arranged on the upper end of the valve seat. The first return spring is arranged in a transverse blind hole, and the first return spring continuously provides a transverse force to the valve seat in the transverse blind hole. The second return spring is arranged in a longitudinal blind hole, and the second return spring continuously provides a longitudinal force to the valve seat in the longitudinal blind hole. The first return spring and the second return spring act on the valve seat together, and the resultant force thereof tends to 45°, and the angle between the direction of the resultant force and the contact surface of the ball tends to 90°, which can compensate for the wear of the ball valve in all directions and can always maintain a good contact area between the valve seat and the ball valve.

[0024] A rubber scraper is set near the contact point between the valve seat and the ball. The rubber scraper is close to the contact point between the valve seat and the ball to make the movement paths of the two closer. A fixing plate is set outside the rubber scraper, and the two are fixed on the valve seat by bolts. In order to improve the cleaning effect of the rubber scraper, several reinforcing ribs are set at the cleaning head of the rubber tube plate, which not only prolongs the service life of the rubber scraper, but also improves its contact strength with the ball.

[0025] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. High-performance metal hard-sealed ball valve elastic valve seat, characterized by: It includes a valve body, a ball, and an elastic valve seat. The inner wall surface of the valve body is provided with a first step, a second step and a third step in sequence. A bearing is provided between the first step and the ball. The bearing is crimped with the first step and the ball respectively. A boss structure is provided on the side of the elastic valve seat close to the ball. A transverse blind hole is provided in the boss structure. A first return spring is provided in the transverse blind hole. One end of the first return spring is against the end face of the side of the second step.

2. The high-performance metal hard-sealed ball valve elastic valve seat according to claim 1 is characterized in that: A longitudinal blind hole is also provided in the boss structure, and a second return spring is provided in the longitudinal blind hole. One end of the second return spring abuts against the end surface of the upper end of the second step.

3. The high performance metal hard seal ball valve elastic valve seat according to claim 2 is characterized in that: A rubber scraper is also provided on the end surface of the boss structure close to the sphere, and a cleaning head is provided at one end of the rubber scraper, and the cleaning head is against the surface of the sphere.

4. The high performance metal hard seal ball valve elastic valve seat according to claim 3 is characterized in that: A fixing plate is arranged on the end surface of the rubber scraper close to the sphere, and the fixing plate fixes the rubber scraper on the boss structure through bolts.

5. The high performance metal hard seal ball valve elastic valve seat according to claim 4 is characterized in that: The cleaning head has a triangular cross section, and the angle between the top of the cleaning head and the surface of the sphere is 15° to 30°.

6. The high performance metal hard seal ball valve elastic valve seat according to claim 5 is characterized in that: The transverse blind holes and the longitudinal blind holes are arranged at equal angles.

7. The high performance metal hard seal ball valve elastic valve seat according to claim 6 is characterized in that: The included angle between two adjacent transverse blind holes and the longitudinal blind hole is 30°.

8. The high performance metal hard seal ball valve elastic valve seat according to claim 7 is characterized in that: A plurality of reinforcing ribs are arranged on the surfaces of both sides of the cleaning head.

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