Angle type ball valve with ball body convenient to maintain

Abstract

According to the technical scheme, the angle type ball valve is characterized by comprising a valve body, the ball body located in the valve body, a valve rod driving the ball body to rotate, a valve cover arranged outside the valve rod in a sleeving mode and limiting the ball body in the valve body, and a left valve seat and a right valve seat which are located on the two sides of the ball body respectively and elastically connected with the valve body. The right valve seat is located in a channel, allowing media to flow, of the valve body, a purging device communicated with an inner cavity of the valve body is arranged on the outer wall of the valve body, and the left valve seat is provided with a seat hole enabling the purging device to be communicated with an inner cavity of the left valve seat. The cavity defined by the inner wall of the left valve seat and the outer wall of the ball body is inflated through the purging device, so that media or impurities on the surface of the ball body are blown off, and the problems that leakage is prone to occurring between the ball body and the valve seats and the opening and closing efficiency of the ball body is low in the prior art are solved.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and more specifically to an angle ball valve that facilitates ball maintenance. Background Technology

[0002] Angle ball valve is a type of ball valve. It generally includes a valve body, valve stem, ball, spring, and valve seat. The valve body is an assembly. The inlet and outlet channels of the valve body and the ball are both right-angled and the channels are round holes. The ball and the valve seat are tightly fitted together by the spring. The ball can rotate 90 degrees in the valve body with the valve stem as the pivot to open and close the valve body (pipeline) channel and prevent the flow of medium in the channel.

[0003] However, existing angle ball valves have defects. During the rotation of the ball, the surface of the ball comes into contact with the flowing medium, causing some medium or impurities to adhere to the surface of the ball and move with the ball. Over time, the medium or impurities adhering to the ball will affect the fit between the valve seat and the ball surface, resulting in local leakage points between the ball and the valve seat and poor sealing performance. Furthermore, the medium or impurities accumulated on the ball will accelerate the wear of the valve seat sealing surface, reduce the service life of the valve seat, and also increase the weight of the ball, resulting in an increase in the torque required by the ball and a decrease in the opening and closing efficiency of the ball. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an angle ball valve that is easy to clean the surface of the ball and has stable sealing performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an angle ball valve that facilitates ball maintenance, comprising a valve body, a ball located within the valve body, a valve stem that drives the ball to rotate, a valve cover sleeved outside the valve stem and confining the ball within the valve body, a left valve seat and a right valve seat located on both sides of the ball and elastically connected to the valve body, wherein the right valve seat is located within the channel of the valve body for the flow of the medium, a purging device communicating with the inner cavity of the valve body is provided on the outer wall of the valve body, and the left valve seat is provided with a seat hole communicating with the inner cavity of the left valve seat. By inflating the cavity formed by the inner wall of the left valve seat and the outer wall of the ball through the purging device, the medium or impurities on the surface of the ball are blown off.

[0006] As a further improvement of this utility model, the right valve seat is provided with a plurality of sealing rings with triangular cross sections and spring-driven, and the facing surfaces of adjacent sealing rings are parallel to each other and tightly fitted.

[0007] As a further improvement of this utility model, the right valve seat sleeve is provided with a spacer ring located between the sealing ring and the spring.

[0008] As a further improvement of this utility model, the right valve seat is fitted with a wave-shaped disc spring located between the spacer ring and the spring.

[0009] As a further improvement of this utility model, a planar bearing is provided between the ball and the valve cover.

[0010] As a further improvement of this utility model, a plurality of heat dissipation fins are provided on the outside of the valve cover, which are distributed along the height direction of the valve cover.

[0011] The beneficial effects of this utility model are as follows: By inflating the cavity formed by the inner wall of the left valve seat and the outer wall of the ball through the purging device, the medium or impurities on the surface of the ball are blown off. Compared with the prior art, this design allows for maintenance of the ball surface without disassembling the valve body, making maintenance operations more convenient. Regular maintenance of the ball ensures that the left and right valve seats are tightly fitted to the ball surface and that the sealing performance is stable. The overall mass of the ball tends to be constant, the opening and closing efficiency of the ball is high, and the wear rate of the left and right valve seats is slowed down, thus extending the service life of the left and right valve seats. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the utility model;

[0013] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0014] Figure 3 for Figure 1 Enlarged view of point B in the middle.

[0015] Reference numerals: 1. Valve body; 2. Ball; 3. Valve stem; 4. Valve cover; 5. Left valve seat; 6. Right valve seat; 7. Purge device; 8. Seat hole; 9. Sealing ring; 10. Spacer ring; 11. Waveform disc spring; 12. Surface bearing; 13. Heat sink. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals.

[0017] Reference Figures 1 to 3 As shown, an angle ball valve for easy maintenance of the ball in this embodiment includes a valve body 1, a ball 2 located inside the valve body 1, a valve stem 3 for driving the ball 2 to rotate, a valve cover 4 sleeved outside the valve stem 3 and confining the ball 2 inside the valve body 1, a left valve seat 5 and a right valve seat 6 located on both sides of the ball 2, the right valve seat 6 being located in the channel for the medium to flow in the valve body 1, and a spring provided between the left valve seat 5 and the right valve seat 6 and the valve body 1, under the action of the spring, both the left valve seat 5 and the right valve seat 6 move toward the ball 2;

[0018] Based on the aforementioned prior art, the left valve seat 5 is machined with a seat hole 8 coaxial with the left valve seat 5, and a through hole coaxial with the seat hole 8 is machined on the outer wall of the valve body 1. A purging device 7 communicating with the through hole is fixedly connected to the outer wall of the valve body 1. The purging device 7 includes a tube connected to the outer wall of the valve body 1 and communicating with the through hole, a switch valve for controlling the opening and closing of the tube, and an air pump for blowing gas into the valve body 1.

[0019] During maintenance of the ball 2, the pipeline for transporting the medium is closed, preventing further flow of the medium into the valve body 1. The valve body 1 is then emptied, and both the left valve seat 5 and the right valve seat 6 are in contact with the surface of the ball 2 under the action of springs. Next, the valve of the purging device 7 is opened, and the air pump pumps gas into the pipe. The gas flows through the pipe, through-hole, and seat hole 8 into the cavity formed by the left valve seat 5 and the ball 2. The gas impacts the surface of the ball 2, blowing off any medium or impurities. As the air pressure in the cavity between the left valve seat 5 and the ball 2 gradually increases, the left valve seat 5 relative to the ball... 2. When the valve is moved away, the spring at the left valve seat 5 is compressed. The gas in the cavity flows through the sealing surfaces of the left valve seat 5 and the ball 2 and blows away the impurities or media on the sealing surfaces. Then, the air pump is kept running and the ball 2 is rotated so that the surface of the ball 2 can be fully blew away. The media or impurities at the bottom of the left valve seat 5 will pass through the gap between the ball 2 and the left valve seat 5 under the action of the gas and enter the channel of the valve body 1 for the media to flow downward. After the maintenance is completed, stop rotating the ball 2 and stop the air pump. The left valve seat 5 re-fits the surface of the ball 2 under the action of the spring. Then, the valve is closed.

[0020] Compared with existing technologies, this design allows for maintenance of the surface of the ball 2 without disassembling the valve body 1, making maintenance operations more convenient. Regular maintenance of the ball 2 ensures that the left valve seat 5 and the right valve seat 6 are tightly fitted to the surface of the ball 2 and that the sealing performance is stable. The overall mass of the ball 2 tends to be constant, and the opening and closing efficiency of the ball 2 is high. At the same time, it slows down the wear rate of the left valve seat 5 and the right valve seat 6, and extends the service life of the left valve seat 5 and the right valve seat 6.

[0021] As one specific implementation method of the improvement, refer to Figure 2 As shown, the right valve seat 6 is fitted with multiple sealing rings 9, each pushed by a spring. These sealing rings 9 are made of rubber and are elastic. The cross-section of each sealing ring 9 in the circumferential direction is triangular. The facing surfaces of adjacent sealing rings 9 are parallel and tightly fitted together. When subjected to the elastic force generated by the spring, the multiple sealing rings 9 are compressed and deformed radially. The adjacent sealing rings 9 are tightly fitted to the inner wall of the valve body 1 and the outer wall of the right valve seat 6, respectively. This design can improve the sealing performance between the right valve seat 6 and the valve body 1, and prevent the medium from flowing between the right valve seat 6 and the valve body 1, thus preventing the valve from being unable to close completely.

[0022] As one specific implementation method of the improvement, refer to Figure 2 As shown, the right valve seat 6 is fitted with a spacer ring 10 located between the sealing ring 9 and the spring. The spacer ring 10 compresses multiple sealing rings 9 under the action of the spring. Compared with the design of directly using the spring to compress the sealing rings 9, this design can make full use of the spacer ring 10 to compress the sealing rings 9 and make up for the defect of uneven force on the sealing rings 9.

[0023] As one specific implementation method of the improvement, refer to Figure 2 As shown, the right valve seat 6 is fitted with a wave-shaped disc spring 11 located between the spacer ring 10 and the spring. Both the wave-shaped disc spring 11 and the spring can generate thrust for the right valve seat 6 to effectively compensate for the sealing between the right valve seat 6 and the ball 2. The wave-shaped disc spring 11 is more stable than the spring structure and is suitable for high-temperature environments. This design can still generate an effective thrust for the right valve seat 6 through the wave-shaped disc spring 11 when the spring fails due to high temperature.

[0024] As one specific implementation of the improvement, since the ball 2 experiences frictional resistance from the valve cover 4 when rotating relative to the valve cover 4, the required driving torque is relatively large, resulting in a decrease in the rotation efficiency of the ball 2. To solve the aforementioned problem, refer to... Figure 3 As shown, a planar bearing 12 is provided between the ball 2 and the valve cover 4, which is sleeved on the valve stem 3. This design can reduce the friction between the valve cover 4 and the ball 2, improve the rotation efficiency of the ball 2, reduce the torque required for the rotation of the ball 2, and at the same time improve the sealing between the valve cover 4 and the ball 2.

[0025] As a specific implementation of the improvement, because the valve stem 3 is long, it is prone to thermal deformation, which can lead to breakage when subjected to torque. To solve the aforementioned problem, refer to... Figure 1 As shown, multiple heat sinks 13 are provided on the outside of the valve cover 4 along the height direction of the valve cover 4. This design can quickly conduct the heat of the valve stem 3 to the outside, improve the structural stability of the valve stem 3, and extend the service life of the valve stem 3.

[0026] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An angle ball valve for easy maintenance of the ball, comprising a valve body (1), a ball (2) located inside the valve body (1), a valve stem (3) for driving the ball (2) to rotate, a valve cover (4) sleeved outside the valve stem (3) and confining the ball (2) inside the valve body (1), a left valve seat (5) and a right valve seat (6) located on both sides of the ball (2) and elastically connected to the valve body (1), wherein the right valve seat (6) is located in the channel of the valve body (1) for the flow of medium, characterized in that: The outer wall of the valve body (1) is provided with a purging device (7) that communicates with the inner cavity of the valve body (1). The left valve seat (5) is provided with a seat hole (8) that communicates the purging device (7) with the inner cavity of the left valve seat (5). The purging device (7) fills the cavity formed by the inner wall of the left valve seat (5) and the outer wall of the ball (2) with air, so that the medium or impurities on the surface of the ball (2) are blown off.

2. The angle ball valve for easy maintenance of the spherical body according to claim 1, characterized in that: The right valve seat (6) is fitted with multiple sealing rings (9) with triangular cross sections and spring-driven, and the faces of adjacent sealing rings (9) are parallel to each other and fit tightly together.

3. The angle ball valve for easy maintenance of the spherical body according to claim 2, characterized in that: The right valve seat (6) is fitted with a spacer (10) located between the sealing ring (9) and the spring.

4. The angle ball valve for easy maintenance of the sphere according to claim 3, characterized in that: The right valve seat (6) is fitted with a wave disc spring (11) located between the spacer ring (10) and the spring.

5. An angle ball valve for easy maintenance of the sphere according to claim 1, 2, 3, or 4, characterized in that: A planar bearing (12) is provided between the ball (2) and the valve cover (4).

6. An angle ball valve for easy maintenance of the sphere according to claim 1, 2, 3, or 4, characterized in that: The valve cover (4) is provided with a plurality of heat sinks (13) distributed along the height direction of the valve cover (4).

Images