Novel butterfly plate noise reduction structure

Abstract

The invention discloses a novel butterfly plate noise reduction structure which comprises a butterfly plate with a circular cross section. The two ends of the valve rod hub penetrate through the butterfly plate from top to bottom and are connected with the butterfly plate; the two ends of the pivot shaft penetrate through the valve rod hub and are connected with the valve rod hub; and the noise reduction accessory is connected with the butterfly plate. By means of the application of the novel butterfly plate noise reduction structure, the flowing state of fluid in a valve body channel can be effectively improved through the arrangement of the noise reduction accessory and the noise reduction ring, formation of vortexes is reduced, then the flowing characteristic of a butterfly valve is optimized, the efficiency of the valve is improved, and meanwhile the noise reduction effect of the butterfly plate is improved. The combination of the noise reduction accessory and the noise reduction ring can effectively reduce aerodynamic noise generated when fluid flows in the valve body channel, noise pollution is reduced, and the working environment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of butterfly valves, and in particular to a novel butterfly plate noise reduction structure. 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 various industrial fields, such as generators, coal gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting, power generation and environmental protection engineering systems. The butterfly valve is mainly used to regulate or cut off various corrosive or non-corrosive fluids. Generally speaking, 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 arranged in the inner cavity of the valve seat. After the valve disc rotates, its edge will be sealed or opened with the valve seat, 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 actuator. In the prior art, when the ordinary butterfly valve works within the range of less than 30% opening, the fluid will generate vortexes when flowing through the valve body channel due to excessive flow velocity, resulting in much greater noise than when the valve is fully open, thereby causing the noise in the place where such a valve is used to exceed the standard, affecting the health of the operator. Summary of the invention

[0003] In view of this, in order to solve the above problems, the object of the present invention is to provide a new butterfly plate noise reduction structure, comprising:

[0004] A butterfly plate, wherein the cross section of the butterfly plate is circular;

[0005] A valve stem hub, both ends of which penetrate the butterfly plate from top to bottom and are connected to the butterfly plate;

[0006] A pivot shaft, both ends of which pass through the valve stem hub and are connected to the valve stem hub;

[0007] A noise reduction accessory is connected to the butterfly plate.

[0008] In another preferred embodiment, a mounting hole is axially penetrated on the valve stem hub, and both ends of the pivot pass through the mounting hole and are connected to the valve stem hub.

[0009] In another preferred embodiment, the noise reduction accessory comprises: a connecting portion and a serrated portion, the connecting portion is connected to the butterfly plate, and the serrated portion is connected to the connecting portion.

[0010] In another preferred embodiment, the two connecting parts are arranged on both sides of the valve stem hub, one connecting part is arranged at the upper end of the butterfly plate, and the other connecting part is arranged at the lower end of the butterfly plate, and the connecting part is arranged at the outer edge of the butterfly plate.

[0011] In another preferred embodiment, a plurality of noise reduction holes are provided on the connecting portion, and the diameters of the plurality of noise reduction holes are the same.

[0012] In another preferred embodiment, both ends of the valve stem hub are arranged on the outer edge of the butterfly plate and connected to the butterfly plate.

[0013] In another preferred embodiment, the sawtooth portion includes a plurality of saw teeth, and the saw teeth extend in a vertical direction.

[0014] In another preferred embodiment, the noise reduction accessory and the butterfly plate are bonded by structural adhesive, or the noise reduction accessory and the butterfly plate are connected by injection molding.

[0015] In another preferred embodiment, the plurality of saw teeth and the plurality of noise reduction holes are arranged along the circumferential direction of the butterfly plate.

[0016] Due to the adoption of the above technical solution, the present invention has the following positive effects compared with the prior art: through the application of the present invention, a new butterfly plate noise reduction structure is proposed, and through the arrangement of noise reduction accessories and noise reduction holes, the flow state of the fluid in the valve body channel can be effectively improved, the formation of vortex can be reduced, and the flow characteristics of the butterfly valve can be optimized, and the efficiency of the valve can be improved. At the same time, the combination of noise reduction accessories and noise reduction holes can also effectively reduce the pneumatic noise generated by the flow of fluid in the valve body channel, reduce noise pollution, and improve the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural diagram of a novel butterfly plate noise reduction structure of the present invention;

[0018] Figure 2 It is a planar structural diagram of a novel butterfly plate noise reduction structure of the present invention.

[0019] In the attached figure:

[0020] 1. Butterfly plate; 2. Valve stem hub; 3. Pivot; 4. Noise reduction accessories; 5. Connecting part; 6. Serrated part; 7. Noise reduction hole. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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.

[0022] In the description of the present invention, it is necessary to understand that the orientation or position relationship indicated by the terms such as "upper", "lower", "left", "right", "inside", "outside", "front", "back", "lateral" and "vertical" is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or original referred to must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] It should be specially explained that the “horizontal” and “vertical” in the present invention are used to illustrate the approximate positional relationship, rather than a strict “horizontal plane” or “vertical plane”.

[0024] like Figure 1 and Figure 2 As shown, a novel butterfly plate noise reduction structure of a preferred embodiment is shown, comprising:

[0025] The butterfly plate 1 has a circular cross section;

[0026] The valve stem hub 2, both ends of which penetrate the butterfly plate 1 from top to bottom and are connected to the butterfly plate 1;

[0027] A pivot shaft 3, both ends of which pass through the valve stem hub 2 and are connected to the valve stem hub 2;

[0028] The noise reduction accessory 4 is connected to the butterfly plate 1 and is used to improve the flow state in the flow channel, thereby reducing the aerodynamic noise in the flow channel.

[0029] Further, as a preferred embodiment, a mounting hole is axially provided on the valve stem hub 2 , and both ends of the pivot 3 pass through the mounting hole and are connected to the valve stem hub 2 .

[0030] Furthermore, as a preferred embodiment, the valve stem hub 2 is connected to an external power device, and the valve stem hub 2 can rotate under the action of the external power device, thereby driving the butterfly plate 1 to rotate.

[0031] Furthermore, as a preferred embodiment, the pivot 3 can provide support for the butterfly plate 1, so that the butterfly plate 1 can rotate freely and remain stable under the support of the pivot 3, avoiding deviation or deformation caused by uneven force.

[0032] Further, as a preferred embodiment, the vertical height of the noise reduction attachment 4 is preferably 5-10 mm, and the horizontal length of the noise reduction attachment 4 is preferably 10-20 mm.

[0033] Further, as a preferred embodiment, the noise reduction accessory 4 includes: a connecting portion 5 and a serrated portion 6 , the connecting portion 5 is connected to the butterfly plate 1 , and the serrated portion 6 is connected to the connecting portion 5 .

[0034] Further, as a preferred embodiment, the connecting portion 5 and the serrated portion 6 are preferably an integrated structure.

[0035] Further, as a preferred embodiment, two connecting parts 5 are arranged on both sides of the valve stem hub 2, one connecting part 5 is arranged at the upper end of the butterfly plate 1, and the other connecting part 5 is arranged at the lower end of the butterfly plate 1, and the connecting part 5 is arranged at the outer edge of the butterfly plate 1.

[0036] Further, as a preferred embodiment, the two connecting parts 5 are centrally symmetrically arranged relative to the valve stem hub 2 .

[0037] Further, as a preferred embodiment, a plurality of noise reduction holes 7 are provided on the connecting portion 5, and the diameters of the plurality of noise reduction holes 7 are the same. Further, the noise reduction holes 7 are used to change the fluid from a turbulent turbulent flow to a stable laminar flow state, thereby reducing the turbulent vortex structure of the flow channel.

[0038] Further, as a preferred embodiment, both ends of the valve stem hub 2 are arranged on the outer edge of the butterfly plate 1 and connected to the butterfly plate 1 .

[0039] Further, as a preferred embodiment, the sawtooth portion 6 includes a plurality of sawteeth extending in the vertical direction. Further, the sawteeth are used to transform the large vortex structure in the flow channel into a small vortex structure, thereby improving the flow structure in the flow channel.

[0040] Further, as a preferred embodiment, the noise reduction accessory 4 and the butterfly plate 1 are bonded by structural adhesive, or the noise reduction accessory 4 and the butterfly plate 1 are connected by injection molding.

[0041] Furthermore, as a preferred embodiment, the plurality of saw teeth and the plurality of noise reduction holes 7 are arranged along the circumferential direction of the butterfly plate 1 .

[0042] Furthermore, as a preferred embodiment, when the butterfly plate 1 opens in the counterclockwise direction under the action of the pivot 3 and the valve stem hub 2, the serrations on the noise reduction accessory 4 will act on the large vortex structure in the flow channel, causing the large vortex structure flowing through the serrations to become a small vortex structure, thereby reducing the turbulence in the pipeline and reducing the aerodynamic noise in the flow channel. The noise reduction hole 7 will change the flow state of the fluid flowing through the noise reduction hole 7 from a turbulent turbulent state to a laminar state, thereby stabilizing the flow area in the flow channel and greatly reducing the aerodynamic noise of the fluid in the channel.

[0043] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it 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 new butterfly plate noise reduction structure, characterized in that: include: A butterfly plate, wherein the cross section of the butterfly plate is circular; A valve stem hub, both ends of which penetrate the butterfly plate from top to bottom and are connected to the butterfly plate; A pivot shaft, both ends of which pass through the valve stem hub and are connected to the valve stem hub; A noise reduction accessory is connected to the butterfly plate.

2. The novel butterfly plate noise reduction structure according to claim 1 is characterized in that: The valve stem hub is provided with a mounting hole extending axially therethrough, and both ends of the pivot pass through the mounting hole and are connected to the valve stem hub.

3. The novel butterfly plate noise reduction structure according to claim 1 is characterized in that: The noise reduction accessory comprises: a connecting part and a serrated part, the two connecting parts are connected to the butterfly plate, and the serrated part is connected to the connecting part.

4. The novel butterfly plate noise reduction structure according to claim 3 is characterized in that: The two connecting parts are arranged on both sides of the valve stem hub, one connecting part is arranged on the upper end of the butterfly plate, and the other connecting part is arranged on the lower end of the butterfly plate, and the connecting part is arranged on the outer edge of the butterfly plate.

5. The novel butterfly plate noise reduction structure according to claim 3 is characterized in that: The connecting portion is provided with a plurality of noise reduction holes, and the diameters of the plurality of noise reduction holes are the same.

6. The novel butterfly plate noise reduction structure according to claim 1 is characterized in that: Both ends of the valve stem hub are arranged on the outer edge of the butterfly plate and connected to the butterfly plate.

7. The novel butterfly plate noise reduction structure according to claim 5 is characterized in that: The sawtooth portion includes a plurality of saw teeth, and the saw teeth extend in a vertical direction.

8. The novel butterfly plate noise reduction structure according to claim 1 is characterized in that: The noise reduction accessory is bonded to the butterfly plate by means of structural adhesive, or the noise reduction accessory is connected to the butterfly plate by means of injection molding.

9. The novel butterfly plate noise reduction structure according to claim 7 is characterized in that: The plurality of saw teeth and the plurality of noise reduction holes are arranged along the circumferential direction of the butterfly plate.

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