Noise reduction butterfly valve device and butterfly valve noise reduction control method

Abstract

The invention provides a noise reduction butterfly valve device and a butterfly valve noise reduction control method. The noise reduction butterfly valve device comprises a sawtooth-shaped noise reduction structure and a telescopic control component. The bottom of the sawtooth-shaped noise reduction structure is arranged on the end face of the butterfly plate, the top of the sawtooth-shaped noise reduction structure is sawtooth-shaped, the sawtooth-shaped noise reduction structure comprises a telescopic mechanism, and the telescopic mechanism is connected with a telescopic control component; the telescopic control component controls the telescopic mechanism to stretch out and draw back according to a preset telescopic rule so as to control the height of the sawtooth-shaped noise reduction structure. The height of the sawtooth-shaped noise reduction structure refers to the distance between the bottom and the top of the sawtooth-shaped noise reduction structure. The sawtooth-shaped noise reduction structure acts on fluid circulation, improves the flowing state in a flow channel and enables a large vortex structure to be changed into a small vortex structure when the fluid flows, so that the turbulent flow condition in a pipeline is reduced, the aerodynamic noise of the fluid in the channel is reduced to a great extent, and the aerodynamic noise of the butterfly plate is effectively reduced; the telescopic mechanism is arranged to adjust the height of the sawtooth-shaped noise reduction structure, and interference between the butterfly plate and the interior of a butterfly valve channel is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of butterfly valves, and in particular to a noise reduction butterfly valve device and a butterfly valve noise reduction control method. Background Art

[0002] The butterfly valve is a simple regulating valve that mainly cuts off and throttles on the pipeline. It has become one of the most widely used valves. The butterfly valve is suitable for conveying various corrosive and non-corrosive fluids in engineering systems such as generators, coal gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting, power generation and environmental protection, and is mainly used to regulate or cut off the flow of fluid media. Generally, the butterfly valve includes a valve body, a valve seat, a valve stem and a valve disc. The valve seat is fixed in the inner cavity of the valve body, and the valve disc is located in the inner cavity of the valve seat. After the valve disc rotates, its edge and the valve seat are sealed or opened, and the valve stem is used to drive the valve disc to rotate. The upper part of the valve stem passes through the upper part of the valve body and is connected to a rotating device such as a handle or an actuator. At present, when the ordinary butterfly valve works within the range of less than 30% opening, the fluid flows through the valve body channel due to the high flow rate and the generation of vortexes at the same time, so the noise generated is much greater than when the valve is fully opened. This situation often causes the noise in the place where this valve is used to exceed the standard, affecting the health of the operator. Summary of the invention

[0003] Based on the above problems, the present invention provides a noise reduction butterfly valve device and a butterfly valve noise reduction control method, aiming to solve the technical problem of noise when the valve is in use.

[0004] A noise reduction butterfly valve device, the butterfly valve comprises a butterfly plate, the butterfly plate is provided with a valve stem hub, the butterfly plate and the valve stem are connected through the valve stem hub, the valve stem is connected to an external rotating device, and comprises a sawtooth noise reduction structure and a telescopic control component;

[0005] The bottom of the sawtooth noise reduction structure is arranged on the end surface of the butterfly plate, the top of the sawtooth noise reduction structure is sawtooth-shaped, and the sawtooth noise reduction structure includes a telescopic mechanism, and the telescopic mechanism is connected to the telescopic control component;

[0006] The telescopic control component controls the telescopic mechanism to telescope according to a preset telescopic rule to control the height of the sawtooth noise reduction structure;

[0007] The height of the sawtooth noise reduction structure refers to the distance from the bottom to the top of the sawtooth noise reduction structure.

[0008] Further, the sawtooth noise reduction structure includes a sawtooth segment, and the telescopic mechanism includes a bonding segment and a telescopic rod disposed in the bonding segment;

[0009] The bottom of the bonding section is fixed to the end face of the butterfly plate, and the sawtooth section is in a sawtooth shape;

[0010] The telescopic rod is connected with the sawtooth section.

[0011] Furthermore, the rotating device controls the opening of the butterfly plate by controlling the rotation of the valve stem. When the rotating device controls the rotation of the butterfly plate, the angle rotation equation of the butterfly plate is expressed as follows:

[0012]

[0013] Among them, y1 represents the rotation angle of the butterfly plate; k represents the flow rate of the fluid entering the butterfly valve, and t represents the rotation time of the butterfly plate.

[0014] Furthermore, in the preset telescopic rule, the equation for the telescopic control component to control the telescopic mechanism to telescope is expressed as follows:

[0015] y2=k|cos(2t)|;

[0016] Among them, t represents the time of butterfly plate rotation, and k represents the flow rate of the fluid entering the butterfly valve;

[0017] y2 represents the extension of the telescopic rod;

[0018] The extension of the telescopic rod is the distance between the top of the telescopic rod and the top of the bonding section.

[0019] Furthermore, the upper and lower end surfaces of the butterfly plate are respectively provided with sawtooth-shaped noise reduction structures.

[0020] Furthermore, the sawtooth noise reduction structure is extended in an arc shape on the end surface of the butterfly plate.

[0021] Furthermore, the valve stem hub penetrates the upper and lower end surfaces of the butterfly valve and is sleeved on the outer wall of the valve stem;

[0022] There is an angle between the valve stem hub and the upper and lower end faces of the butterfly plate.

[0023] Furthermore, the bonding section and the butterfly plate are bonded together by bonding adhesive or are integrally formed.

[0024] A butterfly valve noise reduction control method uses the aforementioned noise reduction butterfly valve device, the method comprising: in the process of the rotating device controlling the rotation of the valve stem to control the opening of the butterfly plate, the telescopic control component controls the telescopic mechanism to telescope according to a preset telescopic rule to control the height of the sawtooth noise reduction structure.

[0025] Furthermore, the angle rotation equation of the butterfly plate when the rotating device controls the butterfly plate to rotate is expressed as follows:

[0026]

[0027] Among them, y1 represents the rotation angle of the butterfly plate; k represents the flow rate of the fluid entering the butterfly valve, and t represents the rotation time of the butterfly plate;

[0028] The equation for the telescopic control component to control the telescopic mechanism to extend and retract is expressed as follows:

[0029] y2=k|cos(2t)|;

[0030] Among them, t represents the time of butterfly plate rotation, and k represents the flow rate of the fluid entering the butterfly valve;

[0031] y2 represents the extension of the telescopic rod;

[0032] The extension of the telescopic rod is the distance between the top of the telescopic rod and the top of the bonding section.

[0033] The beneficial technical effect of the present invention is that by improving the butterfly plate of the butterfly valve and adding a serrated noise reduction structure, the serrated noise reduction structure acts on the fluid circulation, improves the flow state in the flow channel, and makes the large vortex structure in the prior art become a small vortex structure, thereby reducing the turbulence in the pipeline, and the telescopic setting of the serrated noise reduction structure avoids interference between the butterfly plate and the inside of the butterfly valve channel, greatly reduces the fluid aerodynamic noise in the channel, improves the flow characteristics of the butterfly valve, and effectively reduces the aerodynamic noise of the butterfly plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 and Figure 2 It is a structural schematic diagram of a butterfly valve part of a noise reduction butterfly valve device of the present invention;

[0035] Figure 3 It is a schematic diagram of the relationship between the telescopic degree of the telescopic rod and the rotation angle of the butterfly plate of a noise reduction butterfly valve device of the present invention and time. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0038] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0039] See also Figure 1-Figure 2The present invention provides a noise reduction butterfly valve device, the butterfly valve comprising a butterfly plate (3), the butterfly plate (3) having a valve stem hub (2), the butterfly plate (3) and the valve stem (1) being connected via the valve stem hub (2), the valve stem (1) being connected to an external rotating device, characterized in that it comprises a sawtooth-shaped noise reduction structure and a telescopic control component;

[0040] The bottom of the sawtooth noise reduction structure is arranged on the end surface of the butterfly plate (3), the top of the sawtooth noise reduction structure is sawtooth-shaped, and the sawtooth noise reduction structure comprises a telescopic mechanism, and the telescopic mechanism is connected to the telescopic control component;

[0041] The telescopic control component controls the telescopic mechanism to telescope according to a preset telescopic rule to control the height of the sawtooth noise reduction structure;

[0042] The height of the sawtooth noise reduction structure refers to the distance from the bottom to the top of the sawtooth noise reduction structure.

[0043] The butterfly plate is also called valve disc. The valve stem hub (2) is used as a connecting shaft between the butterfly plate and the valve stem.

[0044] The present invention improves the butterfly plate of the butterfly valve and adds a sawtooth noise reduction structure. The sawtooth noise reduction structure acts on the fluid circulation, improves the flow state in the flow channel, and transforms the large vortex structure in the prior art into a small vortex structure, thereby reducing the turbulence in the pipeline. The telescopic setting of the sawtooth noise reduction structure avoids interference between the butterfly plate and the inside of the butterfly valve channel, and also greatly reduces the fluid aerodynamic noise in the channel, thereby improving the flow characteristics of the butterfly valve and effectively reducing the aerodynamic noise of the butterfly plate.

[0045] Furthermore, the sawtooth-shaped noise reduction structure comprises a sawtooth segment (5), and the telescopic mechanism comprises a bonding segment (4) and a telescopic rod arranged in the bonding segment (4);

[0046] The bottom of the bonding section (4) is fixed to the end surface of the butterfly plate (3), and the sawtooth section (5) is in a sawtooth shape;

[0047] The telescopic rod is connected to the sawtooth section (5).

[0048] Furthermore, the rotating device controls the opening of the butterfly plate by controlling the rotation of the valve stem. When the rotating device controls the rotation of the butterfly plate (3), the angular rotation equation of the butterfly plate (3) is expressed as follows:

[0049]

[0050] Wherein, y1 represents the rotation angle of the butterfly plate (3); k represents the flow rate of the fluid entering the butterfly valve; and t represents the rotation time of the butterfly plate (3).

[0051] Furthermore, in the preset telescopic rule, the equation for the telescopic control component to control the telescopic mechanism to telescope is expressed as follows:

[0052] y2=k|cos(2t)|;

[0053] Wherein, t represents the time for the butterfly plate (3) to rotate, and k represents the flow rate of the fluid entering the butterfly valve;

[0054] y2 represents the extension of the telescopic rod;

[0055] The extension of the telescopic rod is the distance between the top of the telescopic rod and the top of the bonding section.

[0056] A specific control method is Figure 3 As shown, in Figure 3 In the figure, the minimum angle of the butterfly plate refers to the butterfly plate in the fully closed state, that is, the angle between the fluid flow direction and the butterfly plate force surface is 90 degrees, that is, the opening is 0. The maximum angle of the butterfly plate refers to the butterfly plate in the fully open state, that is, the fluid flow direction is parallel to the butterfly plate force surface, that is, the opening is 90 degrees. The minimum contraction length refers to the extension of the telescopic rod to the minimum. The maximum extension length refers to the extension of the telescopic rod to the maximum.

[0057] When the butterfly plate rotates from a certain opening to a closed state, according to the above formula, the telescopic rod contracts over time at first, so that the height of the sawtooth noise reduction structure decreases, thereby avoiding interference between the sawtooth segment (5) on the butterfly plate and the inside of the butterfly valve channel.

[0058] The presence of the sawtooth segment (5) effectively breaks the original large vortex structure in the flow channel into a small vortex structure, fully improving the flow structure in the flow channel, thereby reducing the aerodynamic noise of the butterfly plate.

[0059] The telescopic sawtooth segment (5) is connected to the bonding segment (4) via a telescopic rod. Specifically, the telescopic control component is an electric mechanism. The electric mechanism realizes the contraction and extension of the sawtooth segment (5) by controlling the telescopic rod installed in the bonding segment (4).

[0060] Specifically, the telescopic length of the telescopic rod is 3-5 mm.

[0061] Specifically, the height D1 of the bonding section (4) is 3-5 mm. The height of the bonding section (4) refers to the distance between the plane where the bottom of the bonding section (4) is located and the plane where the top of the bonding section (4) is located.

[0062] Specifically, the height D2 of the sawtooth segment (5) is 5-7 mm. The height of the sawtooth segment (5) refers to the distance between the plane where the bottom of the sawtooth segment (5) is located and the plane where the top of the sawtooth segment (5) is located.

[0063] The interior of the bonding section (4) is hollowed out, thereby facilitating the extension and retraction of the telescopic rod and realizing the contraction and extension of the sawtooth section (5) during the rotation process of the butterfly plate (3).

[0064] Furthermore, the upper and lower end surfaces of the butterfly plate (3) are respectively provided with sawtooth-shaped noise reduction structures.

[0065] Furthermore, the sawtooth-shaped noise reduction structure is arranged to extend in an arc shape on the end surface of the butterfly plate (3).

[0066] The sawtooth-shaped noise reduction structure is arranged in an arc-shaped manner in a region close to the end face edge of the butterfly plate (3), and is arranged circumferentially along the end face edge of the butterfly plate (3).

[0067] The extension direction of the sawtooth noise reduction structure from the bottom of the end face connected to the butterfly plate to the sawtooth top is close to the axial direction of the butterfly plate, forming a small angle, that is, the sawtooth noise reduction structure is slightly inclined toward the axial direction of the butterfly plate from the bottom to the top.

[0068] Furthermore, the valve stem hub (2) penetrates the upper and lower end surfaces of the butterfly valve (3) and is sleeved on the outer wall of the valve stem (1);

[0069] An angle is formed between the upper and lower end surfaces of the valve stem hub (2) and the butterfly plate (3).

[0070] The included angle is not 0, that is, the valve stem hub (2) is offset relative to the butterfly plate (3).

[0071] Furthermore, the bonding section (4) and the butterfly plate (3) are bonded together by adhesive or are integrally formed.

[0072] Specifically, the bonding adhesive is a structural adhesive. The bonding section (4) and the butterfly plate (3) can also be integrally injection molded.

[0073] The present invention also provides a butterfly valve noise reduction control method, using the aforementioned noise reduction butterfly valve device, the method comprising: in the process of the rotating device controlling the rotation of the valve stem to control the opening of the butterfly plate, the telescopic control component controls the telescopic mechanism to telescope according to a preset telescopic rule to control the height of the sawtooth noise reduction structure.

[0074] Furthermore, the angle rotation equation of the butterfly plate when the rotating device controls the butterfly plate to rotate is expressed as follows:

[0075]

[0076] Among them, y1 represents the rotation angle of the butterfly plate; k represents the flow rate of the fluid entering the butterfly valve, and t represents the rotation time of the butterfly plate;

[0077] The equation for the telescopic control component to control the telescopic mechanism to extend and retract is expressed as follows:

[0078] y2=k|cos(2t)|;

[0079] Among them, t represents the time of butterfly plate rotation, and k represents the flow rate of the fluid entering the butterfly valve;

[0080] y2 represents the extension of the telescopic rod;

[0081] The extension of the telescopic rod is the distance between the top of the telescopic rod and the top of the bonding section.

[0082] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A noise reduction butterfly valve device, the butterfly valve comprising a butterfly plate, the butterfly plate having a valve stem hub, the butterfly plate and the valve stem being connected via the valve stem hub, the valve stem being connected to an external rotating device, characterized in that: It includes a sawtooth noise reduction structure and a telescopic control component; The bottom of the sawtooth noise reduction structure is arranged on the end surface of the butterfly plate, the top of the sawtooth noise reduction structure is sawtooth-shaped, and the sawtooth noise reduction structure comprises a telescopic mechanism, and the telescopic mechanism is connected to the telescopic control component; The telescopic control component controls the telescopic mechanism to telescope according to a preset telescopic rule, so as to control the height of the sawtooth noise reduction structure; The height of the sawtooth noise reduction structure refers to the distance from the bottom to the top of the sawtooth noise reduction structure.

2. A noise reduction butterfly valve device according to claim 1, characterized in that: The sawtooth noise reduction structure includes a sawtooth segment, and the telescopic mechanism includes a bonding segment and a telescopic rod arranged in the bonding segment; The bottom of the bonding section is fixed to the end surface of the butterfly plate, and the sawtooth section is in a sawtooth shape; The telescopic rod is connected to the sawtooth segment.

3. A noise reduction butterfly valve device according to claim 2, characterized in that: The rotating device controls the opening of the butterfly plate by controlling the rotation of the valve stem. When the rotating device controls the rotation of the butterfly plate, the angular rotation equation of the butterfly plate is expressed as follows: Wherein, y1 represents the rotation angle of the butterfly plate; k represents the flow rate of the fluid entering the butterfly valve; and t represents the rotation time of the butterfly plate.

4. A noise reduction butterfly valve device as claimed in claim 3, characterized in that: In the preset telescopic rule, the equation for the telescopic control component to control the telescopic mechanism to telescope is expressed as follows: y2=k|cos(2t)|; Wherein, t represents the time for the butterfly plate to rotate, and k represents the flow rate of the fluid entering the butterfly valve; y2 represents the extension of the telescopic rod; The extension of the telescopic rod is the distance between the top of the telescopic rod and the top of the bonding section.

5. A noise reduction butterfly valve device according to claim 1, characterized in that: The sawtooth-shaped noise reduction structure is respectively arranged on the upper and lower end surfaces of the butterfly plate.

6. A noise reduction butterfly valve device as claimed in claim 5, characterized in that: The sawtooth noise reduction structure is extended in an arc shape on the end surface of the butterfly plate.

7. A noise reduction butterfly valve device according to claim 1, characterized in that: The valve stem hub passes through the upper and lower end surfaces of the butterfly valve and is sleeved on the outer wall of the valve stem; An angle is formed between the valve stem hub and the upper and lower end surfaces of the butterfly plate.

8. A noise reduction butterfly valve device as claimed in claim 2, characterized in that: The bonding section and the butterfly plate are bonded together by bonding glue or are integrally formed.

9. A butterfly valve noise reduction control method, characterized in that: Using a noise reduction butterfly valve device as described in any one of claims 3 to 8, the method includes: in the process of the rotating device controlling the rotation of the valve stem to control the opening of the butterfly plate, the telescopic control component controls the telescopic mechanism to telescope according to a preset telescopic rule to control the height of the sawtooth noise reduction structure.

10. A butterfly valve noise reduction control method according to claim 9, characterized in that: The angular rotation equation of the butterfly plate when the rotating device controls the butterfly plate to rotate is expressed as follows: Wherein, y1 represents the rotation angle of the butterfly plate; k represents the flow rate of the fluid entering the butterfly valve; and t represents the rotation time of the butterfly plate; The equation for the telescopic control component to control the telescopic mechanism to extend and retract is expressed as follows: y2=k|cos(2t)|; Wherein, t represents the time for the butterfly plate to rotate, and k represents the flow rate of the fluid entering the butterfly valve; y2 represents the extension of the telescopic rod; The extension of the telescopic rod is the distance between the top of the telescopic rod and the top of the bonding section.

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