Flow control butterfly valve

Abstract

The utility model discloses a flow control butterfly valve which comprises a valve body and a valve plate, a cavity channel is formed in the valve body, the valve plate is rotatably installed on the valve body, a plurality of through holes are formed in the valve plate, flow guide teeth are arranged on the edge of the valve plate, flow guide teeth are arranged on the two sides of the valve plate, and the flow guide teeth are communicated with the cavity channel. A plurality of non-contact flow guide teeth are distributed on each side of the valve plate, and the flow guide teeth on each side are distributed in an arc shape. The control butterfly valve has the following beneficial effects that the cavity channel of the valve body cannot be completely sealed due to the existence of the through hole in the valve plate, so that the whole butterfly valve cannot completely cut off the circulation of liquid, only the flow of the liquid flowing through the valve body can be controlled, the excessive pressure in a pipeline cannot be caused, and the safety coefficient is relatively higher.

Description

Technical Field

[0001] This utility model relates to the field of valve equipment, and in particular to a flow control butterfly valve. Background Technology

[0002] Flow control butterfly valves are a commonly used type of butterfly valve. The structure of commonly used butterfly valves is shown in patent publication document CN220268446U. This type of butterfly valve regulates the flow rate by controlling the gap between the control disc (reference number 2 in the document) and the valve seat (reference number 1 in the document). However, this type of butterfly valve has a hidden danger during use. When the disc rotates to be completely flush with the valve seat (disc and valve seat), the entire valve turns into a shut-off valve. After turning into a shut-off valve, the pressure in the pipeline can easily increase, thus causing a safety hazard. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes a flow control butterfly valve. Because the through holes on the valve plate cannot completely seal the valve body cavity, the entire butterfly valve cannot completely stop the flow of liquid. It can only control the flow rate of liquid flowing through the valve body, thus preventing excessive pressure in the pipeline and providing a relatively higher safety factor.

[0004] The technical solution adopted by this utility model is as follows:

[0005] A flow control butterfly valve includes a valve body and a valve plate. The valve body has a cavity, and the valve plate is rotatably mounted on the valve body. The valve plate has several through holes, and guide teeth are provided at the edge of the valve plate. Guide teeth are provided on both sides of the valve plate, and multiple non-contact guide teeth are distributed on each side of the valve plate. The guide teeth on each side are distributed in an arc shape.

[0006] In this type of control butterfly valve, a valve plate is rotatably mounted on the valve body. The valve plate is used to close the cavity of the valve body, which is a passage for liquid flow. However, because the valve plate has through holes, these holes can also serve as passages for liquid flow. Therefore, in this type of control butterfly valve, the presence of through holes on the valve plate prevents the complete closure of the cavity of the valve body. Consequently, the entire butterfly valve cannot completely stop the flow of liquid. This type of butterfly valve can only control the flow rate of liquid passing through the valve body. This type of valve body will not cause excessive pressure in the pipeline, resulting in a relatively higher safety factor.

[0007] In summary, because the through holes on the valve plate of this type of control butterfly valve cannot completely seal the cavity of the valve body, the entire butterfly valve cannot completely stop the flow of liquid. It can only control the flow rate of liquid flowing through the valve body, which will not cause excessive pressure in the pipeline and has a relatively higher safety factor.

[0008] Meanwhile, in this type of control butterfly valve, guide teeth are provided on both sides of the valve plate. The presence of guide teeth is to reduce the resistance encountered by the valve plate when rotating the valve plate, ensuring smoother rotation of the valve plate. At the same time, the presence of guide teeth can ensure smooth fluid flow and reduce turbulence.

[0009] Optionally, it also includes a first valve stem and a second valve stem, the first valve stem and the second valve stem being respectively disposed on both sides of the valve plate, the first valve stem being rotatably engaged with a first valve hole on the valve body, and the second valve stem being rotatably engaged with a second valve hole on the valve body.

[0010] The function of the first and second valve stems is to ensure that the valve plate can rotate stably relative to the valve body.

[0011] Optionally, the first valve orifice is a countersunk hole, and the second valve orifice is a through hole.

[0012] Optionally, a retaining ring is provided on the second valve stem.

[0013] The presence of a retaining ring can improve the stability of the fit between the second valve stem and the valve body.

[0014] Optionally, it also includes a connecting tapered pin, wherein the first valve stem and the valve plate are engaged together by the connecting tapered pin, and the second valve stem and the valve plate are engaged together by the connecting tapered pin.

[0015] Specifically, both the first and second valve stems are connected to the valve plate via a connecting tapered pin.

[0016] Optionally, the first valve stem and the second valve stem are aligned in a straight line.

[0017] Optionally, it also includes a valve seat, which is disposed on the valve body and has an arcuate contact surface for contacting the valve plate.

[0018] Specifically, the arc contact surface of the valve seat is roughly an elliptical arc contact surface. The elliptical arc contact surface and the valve plate are in line contact. In this way, the valve seat and the valve plate are changed from a traditional surface seal to a line seal, which reduces the probability of material accumulation and seizing between the valve seat and the valve plate and can reduce media deposition.

[0019] Optionally, a sealing bracket may also be included, which is disposed on the valve body.

[0020] The beneficial effects of this utility model are: the presence of through holes on the valve plate cannot completely seal the cavity of the valve body, so the entire butterfly valve cannot completely stop the flow of liquid, but can only control the flow rate of liquid flowing through the valve body, which will not cause excessive pressure in the pipeline and has a relatively higher safety factor. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a simplified schematic diagram of a flow control disc valve.

[0023] Figure 2 This is a schematic diagram showing the positional relationship between the first valve stem and the second valve stem on the valve plate;

[0024] Figure 3 This is a schematic diagram showing the state when the valve plate is completely pressed against the valve seat.

[0025] Figure 4 yes Figure 3 A simplified cross-sectional diagram along the BB direction;

[0026] Figure 5 This is a simplified schematic diagram of the valve seat structure.

[0027] The figures are labeled as follows: 1. Valve body; 2. Valve seat; 201. Arc contact surface; 3. Valve plate; 301. Through hole; 302. Guide tooth; 4. Sealing bracket; 501. First valve stem; 502. Second valve stem; 6. Connecting cone pin; 7. Snap ring. Detailed Implementation

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0031] As attached Figure 1 ~Attached Figure 5 As shown, a flow control butterfly valve includes a valve body 1 and a valve plate 3. The valve body 1 has a cavity, and the valve plate 3 is rotatably mounted on the valve body 1. The valve plate 3 has several through holes 301, and guide teeth 302 are provided at the edge of the valve plate 3. Guide teeth 302 are provided on both sides of the valve plate 3, and multiple non-contact guide teeth 302 are distributed on each side of the valve plate 3. The guide teeth 302 on each side are distributed in an arc shape.

[0032] In this type of control butterfly valve, a valve plate 3 is rotatably mounted on the valve body 1. The valve plate 3 is used to close the cavity of the valve body 1, which is a channel for liquid flow. However, because the valve plate 3 has a through hole 301, which can also serve as a channel for liquid flow, the through hole 301 on the valve plate 3 cannot completely close the cavity of the valve body 1. Therefore, the entire butterfly valve cannot completely stop the flow of liquid. This type of butterfly valve can only control the flow rate of liquid flowing through the valve body 1. This type of valve body 1 will not cause excessive pressure in the pipeline, and the safety factor is relatively higher.

[0033] In summary, because the through hole 301 on the valve plate 3 cannot completely seal the cavity of the valve body 1, this type of control butterfly valve cannot completely stop the flow of liquid. It can only control the flow rate of liquid flowing through the valve body 1, which will not cause excessive pressure in the pipeline and has a relatively higher safety factor.

[0034] Meanwhile, in this type of control butterfly valve, guide teeth 302 are provided on both sides of the valve plate 3. The presence of guide teeth 302 is to reduce the resistance encountered by the valve plate 3 when rotating the valve plate 3, so as to ensure that the valve plate 3 rotates more smoothly. At the same time, the presence of guide teeth 302 can ensure smooth fluid flow and reduce turbulence.

[0035] As attached Figure 1 ~Attached Figure 5As shown, it also includes a first valve stem 501 and a second valve stem 502. The first valve stem 501 and the second valve stem 502 are respectively disposed on both sides of the valve plate 3. The first valve stem 501 is rotatably engaged with the first valve hole on the valve body 1, and the second valve stem 502 is rotatably engaged with the second valve hole on the valve body 1.

[0036] The function of the first valve stem 501 and the second valve stem 502 is to ensure that the valve plate 3 can rotate stably relative to the valve body 1.

[0037] As attached Figure 1 ~Attached Figure 5 As shown, the first valve hole is a countersunk hole, and the second valve hole is a through hole 301.

[0038] As attached Figure 1 ~Attached Figure 5 As shown, a retaining ring 7 is provided on the second valve stem 502.

[0039] The presence of the retaining ring 7 can improve the stability of the fit between the second valve stem 502 and the valve body 1.

[0040] As attached Figure 1 ~Attached Figure 5 As shown, it also includes a connecting cone pin 6. The first valve stem 501 and the valve plate 3 are connected together by the connecting cone pin 6, and the second valve stem 502 and the valve plate 3 are connected together by the connecting cone pin 6.

[0041] Specifically, both the first valve stem 501 and the second valve stem 502 are connected to the valve plate 3 via a connecting tapered pin 6.

[0042] As attached Figure 1 ~Attached Figure 5 As shown, the first valve stem 501 and the second valve stem 502 are on a straight line.

[0043] As attached Figure 1 ~Attached Figure 5 As shown, it also includes a valve seat 2, which is disposed on the valve body 1. The valve seat 2 is provided with an arc-shaped contact surface 201, which is used to contact the valve plate 3.

[0044] Specifically, the arc contact surface 201 of the valve seat 2 is roughly elliptical arc contact surface 201. The elliptical arc contact surface 201 and the valve plate 3 are in line contact. In this way, the valve seat 2 and the valve plate 3 are changed from traditional surface sealing to line sealing, which reduces the probability of material accumulation and seizing between the valve seat 2 and the valve plate 3 and can reduce media deposition.

[0045] As attached Figure 1 ~Attached Figure 5 As shown, it also includes a sealing bracket 4, which is disposed on the valve body 1.

[0046] The above-described embodiments only illustrate some aspects of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flow control butterfly valve, comprising a valve body and a valve plate, wherein the valve body has a cavity, and the valve plate is rotatably mounted on the valve body, characterized in that, The valve plate has several through holes, and guide teeth are provided at the edge of the valve plate. Guide teeth are provided on both sides of the valve plate, and multiple non-contact guide teeth are distributed on each side of the valve plate. The guide teeth on each side are distributed in an arc shape.

2. The flow control butterfly valve according to claim 1, characterized in that, It also includes a first valve stem and a second valve stem, which are respectively disposed on both sides of the valve plate. The first valve stem is rotatably engaged with the first valve hole on the valve body, and the second valve stem is rotatably engaged with the second valve hole on the valve body.

3. A flow control butterfly valve according to claim 2, characterized in that, The first valve hole is a countersunk hole, and the second valve hole is a through hole.

4. A flow control butterfly valve according to claim 2, characterized in that, The second valve stem is equipped with a retaining ring.

5. A flow control butterfly valve according to claim 2, characterized in that, It also includes a connecting tapered pin, wherein the first valve stem and the valve plate are engaged together by the connecting tapered pin, and the second valve stem and the valve plate are engaged together by the connecting tapered pin.

6. A flow control butterfly valve according to claim 2, characterized in that, The first valve stem and the second valve stem are in a straight line.

7. A flow control butterfly valve according to claim 1, characterized in that, It also includes a valve seat, which is disposed on the valve body and has an arc-shaped contact surface for contacting the valve plate.

8. A flow control butterfly valve according to claim 1, characterized in that, It also includes a sealing bracket, which is disposed on the valve body.

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