Lightweight ball for ball valve

Abstract

A light-weight ball body for a ball valve comprises a flow channel, an outer wall, a conical surface, a sealing belt, a protruding part, an extending part and a circular truncated cone. The sealing belt is formed in a connecting area of the flow channel, the outer wall and the extension part in the cross direction, and extends towards the major diameter direction along the center of the ball body; the flow channel is a tubular channel penetrating through the ball body, and openings in the two ends are located in the outer wall. The extending part is of a tubular structure with two bulges which are arranged on the outer wall in a crossed manner, and extends to the sealing belt; the conical surface is formed at the junction of the continuously connected edges of the runner, the outer wall and the extension part; the protruding part is arranged on the outer wall and the extending part and integrally formed with the outer wall and the extending part, and at least one straight notch is formed in the protruding part, or a guide hole and a polygonal structure are arranged on the protruding part. The lightweight design of the ball body is achieved, the problems that a hollow ball is definitely prohibited by related technical standards and is poor in quality are solved, and the problems that a solid ball is heavy and high in cost are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the ball of the general industrial pipeline control valve ball valve, especially relates to a kind of light weight ball valve ball using annular sealing structure formed based on similar wall thickness body. BACKGROUND

[0002] Ball valve, as an important industrial valve, is a kind of valve, and the opening and closing part (ball) is driven by valve rod and rotates around the axis of valve rod, supports manual, pneumatic, electric, hydraulic drive mode.English name is ball valve.Originated in the 1950s, widely used in petroleum refining, long-distance pipeline, chemical industry, papermaking industry, mainly used for cutting off or connecting pipeline medium.According to structure, it is divided into floating ball, fixed ball ball valve and other types, realizes quick opening and closing by 90 degree rotation, has small fluid resistance, compact structure, strong sealing performance and other characteristics.The valve sealing surface material widely uses plastic, can work stably in vacuum to high pressure environment.The nominal diameter range floating type is DN6mm to DN1200mm, fixed type is DN50mm to DN2000mm, suitable temperature-29 ℃ to 380 ℃, pressure grade is up to PN4.0 (40Bar).With the continuous improvement of industrial automation, the reliability, sealing performance, wear resistance and service life of ball are increasingly strict, and the structure design of ball as a key part is particularly important.

[0003] The ball of the currently marketed ball valve has solid ball and hollow ball, as shown in Figure 5 and Figure 6 .

[0004] The hollow ball is composed of flow channel, spherical pipe and upper slot block.

[0005] In the current industry-related technical standards, it is clearly prohibited to use process non-standard, adopt multi-point welding method to produce hollow ball.But due to the over-competitive market price, many manufacturers still use a large number of unqualified hollow balls to reduce cost, which leads to serious quality problems in the final product, and the service life is also greatly shortened.

[0006] Even if the solid ball has obvious defects in actual application.For example, a ball valve with nominal diameter of DN800mm and pressure grade of PN16, the weight of the internal solid ball can be as high as 2900kg.Even if a part of material is cut off from the upper and lower middle of the ball as shown in Figure 7 and Figure 8 , the weight is still 2600kg.The heavy ball not only has high cost, but also brings a series of problems: the self weight of the ball is too large, which leads to significant increase of operating torque, and support structure must be added in the valve body to meet the use requirements.These further increase the weight and manufacturing cost of the whole ball valve. Summary of the Invention

[0007] To address the problems mentioned above, this invention is proposed.

[0008] A lightweight ball for a ball valve includes a flow channel 101, an outer wall 102, a conical surface 103, a sealing strip 104, a protrusion 105, an extension 106, and a frustum 107. The sealing strip 104 is formed in the connection area of ​​the flow channel 101, the outer wall 102, and the extension 106 in the cross direction, and extends along the center of the ball towards the major diameter direction.

[0009] The flow channel 101 is a tubular channel that penetrates the sphere, with its two ends opening above the outer wall 102.

[0010] The extension 106 is a raised tubular structure on the outer wall 102 arranged in a cross shape with the flow channel 101, extending to the sealing strip 104.

[0011] The conical surface 103 is formed at the intersection of the edges where the flow channel 101, outer wall 102, and extension 106 are continuously connected.

[0012] The protrusion 105 is disposed on the outer wall 102 and the extension 106, and is integrally formed with the outer wall 102 and the extension 106.

[0013] At least one straight groove 110 is provided on the protrusion 105.

[0014] The protrusion 105 is provided with a guide hole 108 and a polygonal structure 109. Beneficial effects

[0015] The ball involved in this invention weighs only about one-third of a solid ball of the same type, successfully solving a long-standing problem in the ball valve industry: solid balls are heavy and costly, while hollow balls are explicitly prohibited by relevant technical standards and are unreliable. Attached Figure Description

[0016] The accompanying drawings help to understand the embodiments;

[0017] Figure 1 This is a cross-sectional view of a lightweight ball for a ball valve according to the present invention;

[0018] Figure 2 yes Figure 1 A cross-sectional view of the other side;

[0019] Figure 3 yes Figure 1 Perspective view of the ball used in a floating ball valve;

[0020] Figure 4 yes Figure 1Perspective view of the ball used in a stationary ball valve;

[0021] Figure 5 This is a cross-sectional view of a commercially available solid sphere;

[0022] Figure 6 This is a cross-sectional view of a commercially available hollow sphere;

[0023] Figure 7 This is a cross-sectional view of a solid ball used in commercially available large-diameter ball valves;

[0024] Figure 8 yes Figure 7 A cross-sectional view of the other side.

[0025] The code in the diagram is:

[0026] 101. Flow channel;

[0027] 102. Outer wall;

[0028] 103. Conical surface

[0029] 104. Sealing tape;

[0030] 105. Protrusion;

[0031] 106. Extension section;

[0032] 107. Frustum;

[0033] 108. Guide hole;

[0034] 109. Polygon;

[0035] 110. Straight groove. Detailed Implementation

[0036] This invention is achieved through the following technical solution:

[0037] The structure of the present invention is as follows Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the sphere is composed of a flow channel 101, an outer wall 102, a conical surface 103, a sealing strip 104, a protrusion 105, an extension 106, and a frustum 107. The sealing strip 104, which is a typical spherical surface, is formed on the sphere. This spherical surface is formed by the flow channel 101, the outer wall 102, and the extension 106 extending in four directions from the center to the major diameter, and connecting with each other at the intersection to form a solid.

[0038] The flow channel 101 of the ball is where the ball valve inputs and outputs the medium. It is usually circular and formed inside the outer wall 102, with a tubular structure.

[0039] The extension 106 on the other side is also tubular in shape and is formed on the outer wall 102 of the flow channel 101 in a cross-shaped manner.

[0040] To ensure effective sealing of the ball valve, a suitable specific pressure must be maintained between the sealing surfaces of the ball and the valve seat. Therefore, conical surfaces 103, forming a complete sealing band 104, are provided at the four continuous edges where the flow channel 101 connects to the outer wall 102 and the extension 106. The maximum diameter of these conical surfaces 103 is equal to the maximum diameter of the inner opening of the ball valve seat. This multi-part configuration ensures reliable sealing.

[0041] The protrusion 105 and the frustum 107 on the upper part of the ball are designed for connecting to the external valve stem. A straight groove 110, a guide hole 108 and a polygon 109 are formed in the middle to cooperate with the insertion of the valve stem head to form an angle transmission of 90° during the operation of the valve in the open and closed positions.

[0042] The foregoing description has been directed to the embodiments considered most practical and preferred. This implementation should not be limited to the disclosed embodiments, but should include various modifications that may be made on the basis of the invention to obtain further structures, as well as combinations with other embodiments to form new implementations to achieve the best effect of the sphere.

Claims

1. A lightweight ball for a ball valve, comprising a flow channel (101), an outer wall (102), a conical surface (103), a sealing strip (104), a protrusion (105), an extension (106), and a frustum (107), characterized in that, The sealing strip (104) is formed in the connection area of ​​the flow channel (101) and the outer wall (102) and the extension (106) in the cross direction, and extends along the center of the sphere towards the large diameter direction.

2. A lightweight ball for a ball valve according to claim 1 or claim 2, characterized in that, The flow channel (101) is a tubular channel that penetrates the sphere, with its two ends opening above the outer wall (102).

3. The ball of a sealing element for a ball valve according to claim 1 or claim 2, characterized in that, The extension (106) is a raised tubular structure on the outer wall (102) arranged in a cross shape with the flow channel (101), extending to the sealing strip (104).

4. A lightweight ball for a ball valve according to claim 1, 2, or 3, characterized in that, The conical surface (103) is formed at the intersection of the edges where the flow channel (101), the outer wall (102), and the extension (106) are continuously connected.

5. The ball of a sealing element for a ball valve according to all the preceding claims, characterized in that: The protrusion (105) is disposed on the outer wall (102) and the extension (106) and is integrally formed with the outer wall (102) and the extension (106).

6. The ball of a sealing element for a ball valve according to all the preceding claims, characterized in that: At least one straight groove (110) is provided on the protrusion (105).

7. The ball of a sealing element for a ball valve according to all the preceding claims, characterized in that: The protrusion (105) is provided with a guide hole (108) and a polygonal (109) structure.

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