Damping type regulating valve main valve

Abstract

The main valve structure of the damping type regulating valve is characterized in that valve bodies on the two sides make sealing contact with and are fixedly connected with the two ends of a middle valve body, and a liquid inlet through hole and a liquid outlet through hole are formed in the centers of the valve bodies on the two sides respectively; valve seats are symmetrically mounted at the inner ends of the valve bodies on the two sides, and the ball body is rotatably supported on the two valve seats; an upper mounting hole in the ball body is in driving connection with the lower end part of the upper valve rod; a lower mounting hole in the ball body is in driving connection with the upper end part of the lower valve rod; an inlet hemisphere is arranged on one side of the overflowing through hole in the sphere, an outlet hemisphere is arranged on the other side of the overflowing through hole in the sphere, and damping small holes are densely formed in the inlet hemisphere; when the regulating valve is in a closed position, the inlet hemisphere rotates to one side in contact with the inner end of the liquid inlet through hole, so that inlet liquid flows through the area of the damping small hole under the inertia effect to realize first impact buffering, reversely flows through the area of the damping small hole again after reaching the inner wall surface of the sphere to realize second impact buffering, and flows out through the inlet. Impact noise generated when the regulating valve is closed can be effectively reduced.

Description

Technical Field

[0001] This invention belongs to the field of valve technology, specifically relating to a damping regulating valve main valve. Background Technology

[0002] A control valve is a type of valve that controls the flow rate by adjusting the opening degree. In conventional ball valve control valves, when the valve is closed, the liquid at the inlet directly impacts the ball surface due to inertia, generating significant impact noise. This noise can cause considerable damage to the valve and piping system.

[0003] Therefore, researching a damped control valve main valve with low impact noise is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by proposing a damped regulating valve main valve that can effectively reduce impact noise. The above-mentioned objective of this invention is achieved through the following technical solution: A damping regulating valve main valve structure includes a middle valve body, side valve bodies, a ball, a valve seat, an upper valve stem, and a lower valve stem; the two side valve bodies are sealed and fixedly connected to the two ends of the middle valve body, and a liquid inlet hole is provided at the center of one side valve body and a liquid outlet hole is provided at the center of the other side valve body; valve seats are symmetrically installed on the inner ends of the two side valve bodies, and the ball is rotatably supported on the valve seats on both sides; The upper mounting hole on the ball is driven to connect with the lower end of the upper valve stem, and the upper end of the upper valve stem is sealed and installed in the upper mounting hole on the middle valve body; the lower mounting hole on the ball is driven to connect with the upper end of the lower valve stem, and the lower end of the lower valve stem is sealed and installed in the lower mounting hole on the middle valve body. The sphere has an inlet hemisphere on one side of the flow passage and an outlet hemisphere on the other side. The inlet hemisphere is densely covered with damping holes. When the regulating valve is in the closed position, the inlet hemisphere rotates to the side that contacts the inner end of the liquid inlet passage, so that the inlet liquid flows through the damping hole area under the action of inertia, achieving the first impact buffer. After reaching the inner wall of the sphere, it flows in the opposite direction and through the damping hole area again, achieving the second impact buffer, and then flows out through the inlet.

[0005] Furthermore, a first sealing ring is installed between the positioning mating surfaces of the two valve bodies and the middle valve body; a second sealing ring is installed between the upper end of the upper valve stem and the upper mounting hole on the middle valve body, and between the lower end of the lower valve stem and the lower mounting hole on the middle valve body.

[0006] Furthermore, a bottom cover is fixedly installed on the body of the middle valve body at the position corresponding to the lower mounting hole by screws, and a third sealing ring is installed between the contact end face of the bottom cover and the middle valve body.

[0007] The advantages and positive effects of this invention are as follows: The present invention features a dense array of damping orifices on the inlet hemisphere of the sphere. When the main valve is closed, the liquid medium flows through the damping orifices a second time, achieving double impact buffering, thereby reducing the impact noise when the main valve is closed and thus reducing the impact damage to valve components and pipelines. Attached Figure Description

[0008] Figure 1 This is an overall sectional view of the main valve structure of the damping regulating valve of the present invention; Figure 2 yes Figure 1 Overall sectional view along the AA direction; Figure 3 yes Figure 2 A schematic diagram of the structure in which the ball head rotates at a certain angle; Figure 4 This is a top view of the sphere in the main valve structure of the damping regulating valve of the present invention; In the diagram: 1. Side valve body; 2. First sealing ring; 3. Ball; 301. Inner wall of the ball; 302. Inlet hemisphere; 4. Middle valve body; 5. Valve seat; 6. Screw; 7. Flat key; 8. Second sealing ring; 9. Upper valve stem; 10. Lower valve stem; 11. Bottom cover; 12. Third sealing ring; 13. Inlet area; 14. Inlet throttling orifice area; 15. Damping orifice area; 16. Inner area of ​​the ball; 17. Outlet throttling orifice area; 18. Outlet area. Detailed Implementation

[0009] The structure of the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that these embodiments are descriptive and not limiting.

[0010] Please refer to the main valve structure of a damped regulating valve. Figures 1-4 The invention comprises a middle valve body 4, a side valve body 1, a ball 3, a valve seat 5, a sealing ring, an upper valve stem 9, a lower valve stem 10, and a bottom cover 11. The sealing rings include a first sealing ring 2, a second sealing ring 8, and a third sealing ring 12, and can be O-rings.

[0011] The two side valve bodies are positioned and fitted to the two ends of the middle valve body and fixedly connected by screws 6. A first sealing ring is installed between the positioning and mating surfaces of the two side valve bodies and the middle valve body to achieve a seal. A liquid inlet hole is provided at the center of one side valve body, and a liquid outlet hole is provided at the center of the other side valve body. Valve seats are symmetrically installed on the inner ends of the two side valve bodies, and the ball is rotatably supported on the valve seats on both sides. The seal between the valve seat and the ball is non-metallic, which has good sealing effect and sealing reliability.

[0012] The upper mounting hole on the ball is connected to the lower end of the upper valve stem via a flat key 7. The upper end of the upper valve stem passes through the upper mounting hole on the middle valve body, and a second sealing ring is installed between their mating surfaces. The lower mounting hole on the ball is connected to the upper end of the lower valve stem via a flat key. The lower end of the lower valve stem passes through the lower mounting hole on the middle valve body, and a second sealing ring is installed between their mating surfaces. A bottom cover is fixed to the middle valve body at a position corresponding to the lower mounting hole using screws. A third sealing ring is installed between the contact surfaces of the bottom cover and the middle valve body. This prevents external media such as water vapor from entering the main valve, reducing corrosion of internal parts caused by water vapor. The upper valve stem, lower valve stem, ball, and middle valve body are coaxially arranged to ensure reliable operation. The ball rotates between 0° and 90° under the action of the upper valve stem, such as Figure 2 As shown, the main valve of the regulating valve is closed at 0°, while the opening area of ​​the main valve is the largest at 90°. At this time, the flow passage on the ball is fully connected with the water inlet passage on one side of the valve body and the water outlet passage on the other side of the valve body.

[0013] The ball has an inlet hemisphere 302 on one side of the flow-through orifice and an outlet hemisphere on the other side. The inlet hemisphere is densely covered with damping orifices. When the main valve changes from the open state to the closed state (the closed state corresponds to the ball head being at 0°), the inlet liquid impacts the main valve ball due to liquid inertia. This invention provides damping orifices on the inlet hemisphere. When the liquid flows through these orifices (which have a damping effect), the liquid impact is buffered. When the liquid further flows through the damping orifices and contacts the inner wall 301 of the ball, flowing in the opposite direction, it flows through the damping orifices a second time, further attenuating the liquid impact and reducing the liquid impact when the valve is closed. The damped regulating valve main valve structure reduces liquid impact when the valve is closed without affecting the regulating function of the valve, thus achieving the design goal.

[0014] The working principle of the main valve structure of this damping control valve: When the regulating valve is in the open position, the liquid flows through inlet region 13, ball inlet throttling orifice 14, damping orifice region 15, ball interior region 16, and ball outlet throttling orifice region 17, and flows out from outlet region 18. During this process, the external valve drive device drives the upper valve stem to move, and the upper valve stem drives the ball to rotate, thereby achieving valve position adjustment. The opening area of ​​the ball is linearly related to the valve position; when the ball valve position is changed, the throttling area at the throttling orifice changes accordingly. When the regulating valve is in the closed position, the inlet liquid, under the action of inertia, flows through damping orifice region 15, achieving the first impact buffer. After reaching the inner wall of the ball, it flows in the opposite direction again through damping orifice region 15, achieving the second impact buffer, and then flows out through the inlet, thereby reducing the liquid impact when closing.

[0015] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A damping regulating valve main valve structure, comprising a middle valve body, side valve bodies, a ball, a valve seat, an upper valve stem, and a lower valve stem; the two side valve bodies are sealed and fixedly connected to both ends of the middle valve body, one side valve body has an inlet through hole at its center, and the other side valve body has an outlet through hole at its center; valve seats are symmetrically installed on the inner ends of the two side valve bodies, and the ball is rotatably supported on the valve seats on both sides; The upper mounting hole on the ball is driven to connect with the lower end of the upper valve stem, and the upper end of the upper valve stem is sealed and inserted into the upper mounting hole on the middle valve body; the lower mounting hole on the ball is driven to connect with the upper end of the lower valve stem, and the lower end of the lower valve stem is sealed and inserted into the lower mounting hole on the middle valve body; characterized in that: The sphere has an inlet hemisphere on one side of the flow passage and an outlet hemisphere on the other side. The inlet hemisphere is densely covered with damping holes. When the regulating valve is in the closed position, the inlet hemisphere rotates to the side that contacts the inner end of the liquid inlet passage, so that the inlet liquid flows through the damping hole area under the action of inertia, achieving the first impact buffer. After reaching the inner wall of the sphere, it flows in the opposite direction and through the damping hole area again, achieving the second impact buffer, and then flows out through the inlet.

2. The damping regulating valve main valve structure according to claim 1, characterized in that: A first sealing ring is installed between the positioning mating surfaces of the two valve bodies and the middle valve body; a second sealing ring is installed between the upper end of the upper valve stem and the upper mounting hole on the middle valve body, and between the lower end of the lower valve stem and the lower mounting hole on the middle valve body.

3. The damping regulating valve main valve structure according to claim 1, characterized in that: A bottom cover is fixedly installed on the body of the middle valve body at the position corresponding to the lower mounting hole by screws, and a third sealing ring is installed between the contact end face of the bottom cover and the middle valve body.

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