Butterfly valve opening degree adjusting mechanism

Abstract

This invention provides a butterfly valve opening adjustment mechanism, including a valve shaft, a butterfly plate, and a valve body. The upper end of the valve shaft is connected to an inner disc. Two bosses I on the inner disc are connected to one side of a hook spring. The inner disc has a groove I on its edge that mates with a stop block. The stop block is positioned within a groove II on an outer ring that mates with the inner disc. A spring is located on the back of the stop block. A rotatable column is located in the central hole of the inner disc. A boss II is located on the side of the column and is connected to the other side of the hook spring. This opening adjustment mechanism provides both a certain degree of opening adjustment and a self-locking capability.

Description

Technical Field

[0001] This invention relates to the field of butterfly valve technology, specifically to a butterfly valve opening adjustment mechanism. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve. Butterfly valves used for controlling the opening and closing of low-pressure pipeline media are characterized by a disc-shaped closing element (valve disc or butterfly plate) that rotates around a valve shaft to achieve opening and closing. These valves can control the flow of various types of fluids, including air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media. They primarily function as shut-off and throttling devices in pipelines. The butterfly valve's opening and closing element is a disc-shaped butterfly plate that rotates around its own axis within the valve body to achieve opening, closing, or regulation.

[0003] The opening degree of a butterfly valve directly affects the flow rate and velocity in a pipeline. Different opening degrees correspond to different application scenarios, and can be flexibly controlled and adjusted according to actual needs. Currently, there is no butterfly valve on the market that better controls the flow rate and velocity of the medium in a pipeline to ensure the smooth operation of industrial production. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a butterfly valve opening adjustment mechanism, comprising a valve shaft, a butterfly plate, and a valve body. The upper end of the valve shaft is connected to an inner disc. The inner disc has two bosses I that are connected to one side of a hook spring. The inner disc has a groove I that mates with a stop block on its edge. The stop block is located in a groove II of an outer ring that mates with the inner disc. A spring is located on the back of the stop block. A rotatable column is located in the center hole of the inner disc. The column has a boss II on its side that is connected to the other side of the hook spring. When no side of the column passes over the spring, it is in a compressed state. There are five grooves II, corresponding to the butterfly valve opening degrees of 0°, 45°, 90°, 135°, and 180°, respectively.

[0005] Preferably, the stop block is a right-angled trapezoid, and the groove I is a triangular groove.

[0006] Preferably, the valve shaft and the inner disc are connected by a key.

[0007] Preferably, boss I and boss II are cylindrical.

[0008] Preferably, the side of the column is a triangular side. Beneficial effects

[0009] The opening adjustment mechanism not only allows for a certain degree of opening adjustment but also provides a self-locking condition. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 A planar three-dimensional model of the opening adjustment mechanism; Figure 3 This is a two-dimensional diagram of the opening adjustment mechanism; Figure 4 This is a two-dimensional diagram of the valve body; Figure 5 A two-dimensional diagram of the column; Figure 6 This is a schematic diagram of the block's structure; Figure 7 This is a schematic diagram of the inner disk structure; Figure 8 This is a schematic diagram of the outer ring structure; Figure 9 This is a schematic diagram of the valve shaft structure; Figure 10 This is a schematic diagram of the butterfly plate structure; Figure 11 This is a schematic diagram of the valve body.

[0011] In the diagram: 1-Outer ring; 2-Valve body I; 3-Stop block; 4-Inner disc; 5-Column; 6-Hook spring; 7-Valve shaft; 8-Valve body; 9-Butterfly plate. Detailed Implementation

[0012] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0013] Please see Figure 1-11 A butterfly valve opening adjustment mechanism includes a valve shaft, a butterfly plate, and a valve body. The upper end of the valve shaft is connected to an inner disc. The inner disc has two bosses I that are connected to one side of a hook spring. The inner disc has a groove I that mates with a stop block on its edge. The groove I is a triangular groove. The stop block is set in a groove II of an outer ring that mates with the inner disc. There are five grooves II, which correspond to the butterfly valve openings of 0°, 45°, 90°, 135°, and 180°, respectively. The back of the stop block has a spring. The stop block is a right-angled trapezoid. A rotatable column is provided in the center hole of the inner disc. The column has a boss II on its triangular side. The boss II is connected to the other side of the hook spring. The spring is in a compressed state when no side of the column passes by.

[0014] With the opening at 0°, the butterfly valve is in the closed state. The triangular groove of the inner disc matches the groove above, and the column is positioned between the upper stop and the right (left) side.

[0015] When the opening is 45°, as the column rotates clockwise (counterclockwise), it causes the side to rotate simultaneously. The clockwise (counterclockwise) hook spring is compressed, while the counterclockwise (clockwise) hook spring is stretched. This causes the right-angled trapezoidal stop, originally pressed against the triangular groove of the inner disc, to push backward, compressing the spring behind it. When the right-angled trapezoidal stop no longer restricts the inner disc, the inner disc rotates clockwise (counterclockwise) under the combined action of the hook springs until the triangular groove of the inner disc reaches the next stop. Because the spring behind the stop remains compressed, when the triangular groove reaches its corresponding position, the right-angled trapezoidal stop quickly abuts against the inner disc, preventing further rotation and giving the mechanism a self-locking function. The inner disc is connected to the valve shaft. When the inner disc rotates 45°, it drives the valve shaft to rotate. The valve shaft is connected to a disc-shaped disc plate, which in turn drives the disc plate, achieving the 45° opening adjustment function of the mechanism.

[0016] When the opening is 90°, the column continues to rotate clockwise (or counterclockwise). The hook spring in the same direction is compressed, while the hook spring in the opposite direction is stretched. The right-angled trapezoidal stop block, which is pressed against the triangular groove of the inner disc, is pushed backward, and the spring behind it is compressed. When it reaches its limit position, the stop block no longer restricts the inner disc, and the inner disc continues to rotate clockwise (or counterclockwise) under the combined action of the hook springs until the triangular groove of the inner disc reaches the next stop block. Since the spring behind the stop block is always in a compressed state, when the triangular groove reaches the corresponding position, the right-angled trapezoidal stop block will quickly press against the inner disc. The rotation of the inner disc drives the rotation of the valve shaft and the butterfly plate, thus achieving the adjustment of the butterfly valve to half-open.

[0017] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A butterfly valve opening degree regulating mechanism comprising a valve shaft, a butterfly plate, a valve body, characterized in that, The upper end of the valve shaft is connected to an inner disc. The inner disc has two bosses I that are connected to one side of a hook spring. The inner disc has a groove I that mates with a stop block on its edge. The stop block is located in a groove II of an outer ring that mates with the inner disc. The back of the stop block has a spring. A rotatable column is located in the center hole of the inner disc. The column has a boss II on its side that is connected to the other side of the hook spring. The spring is in a compressed state when no side of the column passes through it. There are 5 grooves II, which correspond to the opening degrees of the butterfly valve as 0°, 45°, 90°, 135°, and 180°, respectively.

2. A butterfly valve opening regulating mechanism according to claim 1, wherein The stop block is a right-angled trapezoid, and the groove I is a triangular groove.

3. A butterfly valve opening regulating mechanism according to claim 1, wherein The valve shaft is connected to the inner disc by a key.

4. A butterfly valve opening regulating mechanism according to claim 1, wherein The bosses I and II are cylindrical.

5. A butterfly valve opening regulating mechanism according to claim 1, wherein The side of the column is a triangular side.

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