Rotary valve plate structure of butterfly valve

Abstract

The rotary valve plate structure of the butterfly valve comprises a valve plate which is installed on a valve body through a valve rod in a rotating fit mode, and the valve rod penetrates through the center relative to the radial direction of the valve plate to be connected. The valve plate is divided into a meeting valve plate half part for meeting fluid media and a back valve plate half part for back to the fluid media by taking the valve rod as a boundary, and the meeting valve plate half part is of a shrinkage structure with the plate body thickness gradually reduced from the boundary to the middle of the edge. According to the butterfly valve, the half part of the valve plate, which is used for meeting fluid media, is contracted, so that the resistance of the fluid passing through the butterfly valve can be reduced, the energy consumption is reduced, and the flow control characteristic is improved.

Description

Technical Field

[0001] This utility model belongs to the field of butterfly valve technology, and in particular relates to a butterfly valve rotary valve plate structure. Background Technology

[0002] Butterfly valves, used in semiconductor equipment, control the flow rate of fluid media, enabling rapid switching and flow regulation. This is crucial for processes in semiconductor manufacturing that require precise control of the fluid media environment. Existing butterfly valves of this type, when in operation to deliver fluid media, typically use a plate of uniform thickness. Because the end face of the plate facing the fluid media has a large area, it is directly impacted by the fluid. However, this end face has poor ability to disperse the fluid, resulting in significant resistance. This resistance not only increases energy consumption but also reduces fluid control characteristics, posing safety hazards to the safe and stable operation of the butterfly valve. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a butterfly valve rotary valve plate structure. By setting the valve plate half that faces the fluid medium in a contracted shape, the resistance of the fluid passing through the butterfly valve can be reduced, thereby reducing energy consumption and improving flow control characteristics.

[0004] Technical solution: To achieve the above objectives, this utility model provides a butterfly valve rotary valve plate structure, including a valve plate that is rotatably mounted on the valve body via a valve stem, wherein the valve stem is radially connected to the valve plate through the center; the valve plate is divided into an impact valve plate half facing the fluid medium and a back valve plate half facing away from the fluid medium, with the valve stem as the dividing point; the impact valve plate half has a tapering structure in which the plate thickness gradually decreases from the dividing point to the middle edge.

[0005] Furthermore, the back valve plate half is a flat plate structure with a uniform thickness, and the thickness of the back valve plate half is the same as the thickness at the boundary of the front valve plate half.

[0006] Furthermore, the valve stem is embedded in the valve plate, and the exposed surface of the valve stem embedded in the valve plate is flush with the plate surface on the same side as the valve plate half facing away from it, so that the valve plate half facing away from it and the valve plate half facing away from it can achieve a smooth connection of the structural surfaces on the same side where the exposed surfaces are located.

[0007] Furthermore, it includes valve plate fasteners, which secure the valve stem to the valve plate after the valve stem is fitted into the valve plate.

[0008] Furthermore, the valve plate fastener is movably connected to the opposite half of the valve plate, and it is screwed into the plate body from the end face of the opposite half of the valve plate to connect to the valve stem, so that the valve plate fastener is hidden inside the valve plate.

[0009] Furthermore, the valve plate fastener is a screw threadedly connected to the valve plate half facing away from the valve stem and the valve stem, and the screw is perpendicular to the valve stem.

[0010] Beneficial effects: By designing the valve plate half that faces the fluid medium into a contracted structure, the end face facing the fluid can disperse the fluid medium when impacted by the fluid, thereby mitigating the impact force and guiding the fluid along the inclined surfaces on both sides of the valve plate half. This reduces the resistance of the fluid medium passing through the butterfly valve, thereby reducing energy consumption and improving flow control characteristics, ensuring the safety and stability of the butterfly valve operation. Attached Figure Description

[0011] Figure 1 A schematic diagram of the assembly of the valve stem and valve plate;

[0012] Figure 2 This is a schematic diagram showing the disassembled structure of the valve stem and valve plate.

[0013] Figure 3 This is a schematic diagram of a valve plate mounted on a valve body via a valve stem rotational fit.

[0014] Figure 4 This is a half-section diagram of the butterfly valve body with the valve plate fully open. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, a butterfly valve rotary valve plate structure includes a valve plate 3 rotatably mounted on a valve body 2 via a valve stem 1. The valve stem 1 is radially connected to the valve plate 3 through its center. The valve plate 3 is divided into an impact valve plate half 31 facing the fluid medium and a back valve plate half 32 facing away from the fluid medium, with the valve stem 1 as the dividing line. The impact valve plate half 31 has a tapering structure with its thickness gradually decreasing from the dividing line to the center of the edge. By designing the impact valve plate half 31 facing the fluid medium in a tapering structure, this invention allows the end face facing the fluid medium to disperse the fluid medium when subjected to fluid impact, thereby mitigating the impact force and guiding the fluid along the inclined surfaces on both sides of the impact valve plate half 31. This reduces the resistance of the fluid medium passing through the butterfly valve, reduces energy consumption, improves flow control characteristics, and ensures the safety and stability of the butterfly valve operation.

[0017] In order to make the flow of the fluid medium more stable and reduce fluctuations after being dispersed and guided by the front valve plate half 31 and then passing through the back valve plate half 32, in this utility model, the back valve plate half 32 is a flat plate structure with a uniform thickness, and the thickness of the back valve plate half 32 is the same as the thickness at the boundary of the front valve plate half 31, thereby avoiding the obstruction of the normal flow of the fluid medium by structural inhomogeneity (such as protrusions).

[0018] Meanwhile, in order to improve the flow connection between the incoming valve plate half 31 and the outgoing valve plate half 32 and reduce fluctuations, the valve stem 1 is embedded in the valve plate 3. The exposed surface 10 of the valve stem 1 embedded in the valve plate 3 is flush with the plate surface on the same side as the outgoing valve plate half 32. This allows the incoming valve plate half 31 and the outgoing valve plate half 32 to achieve a smooth connection of the structural surfaces on the same side of the exposed surface 10. This allows the fluid medium to flow through the outgoing valve plate half 32 very naturally and with reduced fluctuations.

[0019] This utility model includes a valve plate fastener 4, which secures the valve stem 1 to the valve plate 3 after the valve plate 3 is fitted together. The valve plate fastener 4 is movably connected to the back valve plate half 32 of the valve plate 3, and screws into the plate body from the end face of the back valve plate half 32 to connect to the valve stem 1, so that the valve plate fastener 4 is hidden inside the valve plate 3. Preferably, the valve plate fastener 4 is a screw threadedly connected to the back valve plate half 32 and the valve stem 1, and the screw is perpendicular to the valve stem 1. Hiding the screw can avoid the screw from obstructing the flow of the fluid medium, further reducing the resistance of the fluid medium through the butterfly valve.

[0020] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A butterfly valve rotary valve plate structure, comprising a valve plate (3) mounted on a valve body (2) via a valve stem (1) through a rotatable fit. The valve stem (1) is radially connected to the valve plate (3) through the center. The valve plate (3) is divided into an impact valve plate half (31) facing the fluid medium and a back valve plate half (32) facing away from the fluid medium, with the valve stem (1) as the dividing line. The impact valve plate half (31) has a tapering structure with the plate thickness gradually decreasing from the dividing line to the middle edge. Its features are: The back valve plate half (32) is a flat plate structure with a uniform thickness, and the thickness of the back valve plate half (32) is the same as the thickness at the boundary of the front valve plate half (31). The valve stem (1) is embedded in the valve plate (3). The exposed surface (10) of the valve stem (1) embedded in the valve plate (3) is flush with the plate surface on the same side as the valve plate half (32) facing away from it, so that the valve plate half (31) facing away from it and the valve plate half (32) facing away from it can achieve a smooth connection of the structural surface through the exposed surface (10) on the same side of the exposed surface (10).

2. The butterfly valve rotary valve plate structure according to claim 1, characterized in that: Includes valve plate fastener (4), the valve stem (1) and valve plate (3) are fitted together and then fastened by the valve plate fastener (4).

3. The butterfly valve rotary valve plate structure according to claim 2, characterized in that: The valve plate fastener (4) is movably connected to the back valve plate half (32) of the valve plate (3), and it is screwed into the plate body from the end face of the back valve plate half (32) to connect to the valve stem (1), so that the valve plate fastener (4) is hidden inside the valve plate (3).

4. The butterfly valve rotary valve plate structure according to claim 3, characterized in that: The valve plate fastener (4) is a screw that is threadedly connected to the valve plate half (32) and the valve stem (1) and is perpendicular to the valve stem (1).

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