Valve seat of sealing ball valve

Abstract

The utility model discloses a valve seat of a sealing ball valve. The valve seat comprises a valve body, a valve rod, a ball body, a fixing shaft, a valve seat body, a spring and a supporting piece. The upper end of the valve body is connected with the valve rod, the ball body is located in the valve body, the upper end of the ball body is connected with the valve rod, the fixing shaft is fixedly connected to the bottom end in the valve body, the valve seat is connected to the interior of the valve body and makes contact with the ball body, one end of the valve seat is connected with the spring, and the end, adjacent to the spring, of the valve seat is connected with the supporting piece. Compared with the prior art, the ball valve has the advantages that the sealing performance between the valve seat and the ball body can be improved, and the problem that the sealing performance between the valve body and the valve seat is poor in abrasion resistance can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a sealing ball valve seat. Background Art

[0002] A ball valve is a type of valve. A ball valve is a valve whose opening and closing part (ball) is driven by a valve stem and rotates around the axis of the ball valve. A ball valve can also be used to regulate and control fluids. According to the driving method, ball valves can be divided into pneumatic ball valves, electric ball valves, and manual ball valves. In China, ball valves are widely used in oil refining, long-distance pipelines, chemicals, papermaking, pharmaceuticals, water conservancy, electricity, municipal administration, steel and other industries.

[0003] In order to ensure the sealing between the valve body and the valve seat, the ball valve in the prior art will keep the valve seat in close contact with the valve body. However, after long-term use, the continuous rotation of the valve seat will easily cause wear between the valve seat and the valve body, resulting in poor wear resistance of the sealing between the valve body and the valve seat. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the above technical defects and provide a sealing ball valve seat which can not only improve the sealing between the valve seat and the ball, but also avoid the problem of poor wear resistance of the sealing between the valve body and the valve seat.

[0005] In order to solve the above problems, the technical solution of the utility model is: a sealing ball valve seat, including a valve body, a valve stem, a ball, a fixed shaft, a valve seat, a spring, and a support member;

[0006] Preferably, the upper end of the valve body is connected to the valve stem, the ball is located inside the valve body, the upper end of the ball is connected to the valve stem, the fixed shaft is fixedly connected to the bottom end of the valve body, the valve seat is connected to the inside of the valve body, the valve seat is in contact with the ball, one end of the valve seat is connected to a spring, and one end of the valve seat adjacent to the spring is connected to a support.

[0007] Furthermore, sealing rings are provided on both sides of the sphere, and the sealing rings are located on both sides of the interior of the valve body.

[0008] Furthermore, a fixing block is provided at the upper end of the valve body, bolts are provided at both sides of the fixing block, the bolts are threadedly connected to the valve body, and a pressure cover is provided at the upper end of the fixing block.

[0009] Furthermore, a groove 1 is provided on one side of the valve seat, one end of the spring is fixedly connected to the inside of the groove 1, a groove 2 is provided on the side of the valve seat close to the groove 1, the support member is located inside the groove 2, and the support member is elastic.

[0010] Furthermore, a sealing filler is provided between the valve seat and the valve body.

[0011] Furthermore, the valve seat is L-shaped at one end close to the sphere, and the valve seat has two contact ends with the sphere, which are a right-angle end and a circular arc end respectively.

[0012] The advantages of the utility model compared with the existing technology are:

[0013] (1) The spring and support member of the utility model squeeze the valve seat from two directions, thereby improving the sealing performance of the valve seat. The sealing ring and sealing packing can not only achieve the sealing effect but also absorb the thermal expansion of the parts at high temperature, thereby improving the sealing performance between the valve seat and the ball and avoiding the poor wear resistance between the valve body and the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a stereoscopic diagram of a valve seat of a sealing ball valve of the utility model.

[0015] Figure 2 The utility model is a diagram of the internal structure of a sealing ball valve seat.

[0016] Figure 3 The utility model is a sealing ball valve seat Figure 2 Enlarged view of point A.

[0017] As shown in the figure: 1. Valve body; 2. Valve stem; 3. Ball; 4. Fixed shaft; 5. Valve seat; 6. Spring; 7. Support; 8. Sealing ring; 9. Fixed block; 10. Pressure cover; 11. Bolt; 12. Groove 1; 13. Groove 2; 14. Sealing packing. DETAILED DESCRIPTION

[0018] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings, wherein the same parts are represented by the same reference numerals.

[0019] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0020] In order to make the contents of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0021] like Figures 1 to 3 As shown, a sealing ball valve seat includes a valve body 1, a valve stem 2 is installed on the upper end of the valve body 1, a ball 3 is located inside the valve body 1, the upper end of the ball 3 is connected to the valve stem 2, a fixed shaft 4 is fixedly installed on the bottom end of the valve body 1, a fixing block 9 is installed on the upper end of the valve body 1, bolts 11 are installed on both sides of the fixing block 9, the bolts 11 are threadedly connected to the valve body 1, and a pressure cover 10 is installed on the upper end of the fixing block 9.

[0022] The valve seat 5 is connected to the inside of the valve body 1, and the valve seat 5 contacts the ball 3. The end of the valve seat 5 close to the ball 3 is L-shaped. The valve seat 5 has two contact ends with the ball 3, which are a right-angle end and an arc end. The arc end can prevent the valve seat 5 from being too tightly fitted with the ball 3 and damaging the ball 3, and the right-angle end can prevent the valve seat 5 from being misaligned with the ball 3.

[0023] A groove 12 is provided on one side of the valve seat 5, one end of a spring 6 is fixedly installed inside the groove 12, the other end of the spring 6 is connected to the valve seat 5, a groove 2 13 is provided on the side of the valve seat 5 close to the groove 12, a support member 7 is located inside the groove 2 13, the support member 7 is elastic, one end of the support member 7 contacts with the inner wall of the groove 2 13, the other end of the support member 7 contacts with the upper end of the valve seat 5, the spring 6 and the support member 7 squeeze the valve seat 5 from two directions, thereby improving the sealing performance of the valve seat 5.

[0024] Sealing rings 8 are installed on both sides of the ball 3, and the sealing rings 8 are located on both sides of the inside of the valve body 1. A sealing packing 14 is installed between the valve seat 5 and the valve body 1. The sealing packing 14 can achieve a sealing effect and absorb the thermal expansion of parts at high temperatures.

[0025] During specific use, the spring 6 and the support member 7 squeeze the valve seat 5 from two directions, thereby improving the sealing performance of the valve seat 5. The sealing ring 8 and the sealing filler 14 can achieve a sealing effect while also absorbing the thermal expansion of the parts at high temperatures.

[0026] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A sealing ball valve seat, characterized in that: It comprises a valve body (1), a valve stem (2), a ball (3), a fixed shaft (4), a valve seat (5), a spring (6), and a support member (7); The upper end of the valve body (1) is connected to the valve stem (2), the ball (3) is located inside the valve body (1), the upper end of the ball (3) is connected to the valve stem (2), the fixed shaft (4) is fixedly connected to the bottom end of the valve body (1), the valve seat (5) is connected to the inside of the valve body (1), the valve seat (5) is in contact with the ball (3), one end of the valve seat (5) is connected to the spring (6), and one end of the valve seat (5) adjacent to the spring (6) is connected to the support member (7); A sealing filler (14) is provided between the valve seat (5) and the valve body (1); the end of the valve seat (5) close to the sphere (3) is L-shaped; the valve seat (5) has two contact ends with the sphere (3), which are a right-angle end and a circular arc end.

2. A sealing ball valve seat according to claim 1, characterized in that: Sealing rings (8) are provided on both sides of the spherical body (3), and the sealing rings (8) are located on both sides of the interior of the valve body (1).

3. The sealing ball valve seat according to claim 1, characterized in that: A fixing block (9) is provided at the upper end of the valve body (1), bolts (11) are provided on both sides of the fixing block (9), the bolts (11) are threadedly connected to the valve body (1), and a pressure cover (10) is provided at the upper end of the fixing block (9).

4. The sealing ball valve seat according to claim 1, characterized in that: A groove one (12) is provided on one side of the valve seat (5), one end of the spring (6) is fixedly connected to the inside of the groove one (12), a groove two (13) is provided on the side of the valve seat (5) close to the groove one (12), the support member (7) is located inside the groove two (13), and the support member (7) is elastic.

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