Butterfly valve with good sealing performance

Abstract

The utility model relates to the technical field of butterfly valves, and discloses a butterfly valve with good sealing performance, which comprises a valve body and a butterfly plate, the butterfly plate is arranged in the valve body, the upper surface of the butterfly plate is connected with a valve shaft, the upper end part of the valve shaft penetrates through the valve body and is connected with a hand wheel, and a sealing ring is arranged in the valve body and is positioned on one side of the butterfly plate. According to the butterfly plate sealing structure, the elastic protrusion is arranged between the sealing ring and the valve body, when the butterfly plate is closed, the butterfly plate is attached to the sealing ring and extrudes the elastic protrusion at the same time, the elastic protrusion is promoted to deform, and therefore the butterfly plate can be sealed. The butterfly valve has the advantages that the butterfly valve is simple in structure, convenient to operate, low in overall manufacturing cost and favorable for improving the overall market competitiveness of the butterfly valve, and the sealing performance is guaranteed while the sealing performance is guaranteed.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of butterfly valves, in particular to a butterfly valve with good sealing performance. BACKGROUND

[0002] The butterfly valve is also called a flap valve, is a simple structure regulating valve, and can be used for on-off control of low-pressure pipeline medium. The butterfly valve refers to a disc-shaped closing piece (valve disc or butterfly plate) which rotates around a valve shaft to achieve opening and closing.

[0003] According to the search, the application No. CN202420030179.4 discloses a butterfly valve with good sealing performance, and belongs to the technical field of butterfly valves. After the butterfly valve is closed, a gas pump is started to inflate the annular sealing air bag, the annular sealing air bag is expanded to abut against the inner wall of the valve body, the sealing performance between the butterfly plate and the inner wall of the valve body is ensured, and therefore the sealing performance of the butterfly valve is improved.

[0004] Although the utility model improves the sealing performance of the butterfly valve, the gas pump and the corresponding PLC need to be added on the basis of the original butterfly valve, the cost of the butterfly valve is increased, the product competitiveness is reduced, and the annular sealing air bag needs to be inflated and deflated every time, so that the use is relatively cumbersome.

[0005] In order to solve the above problems, the application provides a butterfly valve with good sealing performance. UTILITY MODEL CONTENTS

[0006] The butterfly valve with good sealing performance provided by the application adopts the following technical scheme:

[0007] The butterfly valve with good sealing performance comprises a valve body and a disc plate, the inside of the valve body is provided with the disc plate, the upper surface of the disc plate is connected with a valve shaft, the upper end of the valve shaft penetrates through the valve body and is connected with a hand wheel, the inside of the valve body and one side of the disc plate are provided with a sealing ring, one side of the sealing ring is provided with an elastic protrusion, and the elastic protrusion is welded with the valve body.

[0008] According to the above technical scheme, when the disc plate is closed, the disc plate is attached to the sealing ring while the elastic protrusion is extruded, the elastic protrusion is deformed, the elastic protrusion applies force to the sealing ring through the rebound force, the sealing ring is always abutted against the side wall of the disc plate, and the sealing performance between the valve body and the disc plate is ensured.

[0009] Further, the side section of the elastic protrusion is in a semicircular structure, and the elastic protrusion is made of spring steel.

[0010] According to the above technical scheme, the rebound force can be applied to the sealing ring.

[0011] Further, the upper surface of the valve body is connected with a top bin, and the inside of the top bin is provided with a sealing ring, which is sleeved on the surface of the valve shaft.

[0012] Through the above technical scheme, the sealing property between the valve shaft and the top bin can be improved.

[0013] Further, the side surface of the valve body is welded with a flange.

[0014] Through the above technical scheme, the connection with the external pipe can be facilitated.

[0015] Further, the side surface of the flange is provided with an annular groove, and the annular groove is provided with a sealing gasket.

[0016] Through the above technical scheme, the sealing property between the flange and the external pipe can be improved.

[0017] Further, the sealing ring, the sealing ring and the sealing gasket are made of flexible graphite material.

[0018] Through the above technical scheme, the unique flexibility and resilience, good temperature resistance, strong corrosion resistance and other advantages are achieved.

[0019] In summary, the present application has the following beneficial technical effects: in the utility model, the elastic protrusion is arranged between the sealing ring and the valve body, when the disc plate is closed, the disc plate is attached to the sealing ring while the elastic protrusion is extruded, the elastic protrusion is deformed, the elastic protrusion exerts force on the sealing ring through the rebound force, the sealing ring is always abutted on the side wall of the disc plate, the sealing property between the valve body and the disc plate is ensured, the utility model has the advantages of simple structure, convenient operation, low overall cost, high market competitiveness of the butterfly valve, etc. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the overall structure schematic diagram of the present application;

[0021] Figure 2 It is the internal structure schematic diagram of the valve body of the present application;

[0022] Figure 3 It is the internal structure schematic diagram of the top bin of the present application.

[0023] Explanation of reference numerals in the drawing:

[0024] 1, valve body; 2, disc plate; 3, valve shaft; 4, hand wheel; 5, top bin; 6, sealing ring; 7, sealing ring; 8, elastic protrusion; 9, flange; 10, sealing gasket. DETAILED DESCRIPTION

[0025] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described; obviously, the described embodiments are only part of the embodiments of the present application, and not all the embodiments of the present application, and all other embodiments obtained by a person of ordinary skill in the art without creative work based on the embodiments in the present application shall fall within the scope of protection of the present application.

[0026] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be internal communication of two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] Embodiment:

[0029] The embodiment of the present application discloses a butterfly valve with good sealing, please refer to Figures 1 to 3 , including valve body 1 and disc plate 2, the inside of valve body 1 is provided with disc plate 2, the upper surface of disc plate 2 is connected with valve shaft 3, and the upper end of valve shaft 3 is connected with hand wheel 4 through valve body 1, the inside of valve body 1 and located at one side of disc plate 2 is provided with sealing ring 7, one side of sealing ring 7 is provided with elastic protrusion 8, and elastic protrusion 8 is welded with valve body 1, by setting elastic protrusion 8 between sealing ring 7 and valve body 1, when closing disc plate 2, the disc plate 2 is attached with sealing ring 7 at the same time, and the elastic protrusion 8 is extruded, so as to make the elastic protrusion 8 deform, and the elastic protrusion 8 will apply force to sealing ring 7 through the rebound force, so as to make sealing ring 7 always abut against the side wall of disc plate 2, guarantee the sealing between valve body 1 and disc plate 2, the utility model discloses simple structure, convenient operation, ensure the sealing while the overall cost is low, be favorable to improving the overall market competitiveness of butterfly valve.

[0030] Please refer to Figure 2The side section of the elastic protrusion 8 is in a semicircular structure, and the elastic protrusion 8 is made of spring steel material and has excellent elastic recovery capacity, so that the elastic protrusion 8 can apply a rebound force to the sealing ring 7, and the sealing ring 7 is urged to abut against the side surface of the disc plate 2.

[0031] Please refer to Figure 1 and Figure 3 The upper surface of the valve body 1 is connected with the top bin 5 in a through manner, and the inside of the top bin 5 is provided with the sealing ring 6, which is sleeved on the surface of the valve shaft 3. By arranging the sealing ring 6, the sealing property between the valve shaft 3 and the top bin 5 is increased, so that the leakage from the valve shaft 3 is avoided.

[0032] Please refer to Figure 1 and Figure 2 The side surface of the valve body 1 is welded with the flange 9, so that the flange 9 connection between the valve body 1 and the external pipe is facilitated.

[0033] Please refer to Figure 1 and Figure 2 The side surface of the flange 9 is provided with the annular groove, and the sealing gasket 10 is arranged at the annular groove, so that the sealing property between the flange 9 and the external pipe is increased, and the leakage is avoided.

[0034] Please refer to Figure 1 , Figure 2 and Figure 3 Figure 3 The sealing ring 7, the sealing ring 6 and the sealing gasket 10 are all made of flexible graphite material, have unique flexibility and resilience, good temperature resistance, strong corrosion resistance and other advantages.

[0035] The implementation principle of the embodiment is that when the disc plate 2 is closed, the disc plate 2 is attached to the sealing ring 7 while the elastic protrusion 8 is extruded, so that the elastic protrusion 8 is deformed. The elastic protrusion 8 will apply force to the sealing ring 7 through the rebound force, so that the sealing ring 7 always abuts against the side wall of the disc plate 2, and the sealing property between the valve body 1 and the disc plate 2 is ensured. The utility model has the advantages of simple structure, convenient operation, low overall cost, and high overall market competitiveness of the butterfly valve.

[0036] The above are preferred embodiments of the application, and do not limit the protection scope of the application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A butterfly valve with good sealing, comprising a valve body (1) and a disc plate (2), characterized in that: The inside of the valve body (1) is provided with a disc plate (2), the upper surface of the disc plate (2) is connected with a valve shaft (3), the upper end of the valve shaft (3) is connected with a hand wheel (4) through the valve body (1), the inside of the valve body (1) and one side of the disc plate (2) are provided with a sealing ring (7), one side of the sealing ring (7) is provided with an elastic protrusion (8), and the elastic protrusion (8) is welded with the valve body (1).

2. The butterfly valve of claim 1, wherein: The side section of the elastic protrusion (8) is a semicircle structure, and the elastic protrusion (8) is made of spring steel material.

3. The butterfly valve of claim 2, wherein: The upper surface of the valve body (1) is connected with a top bin (5) through, and the inside of the top bin (5) is provided with a sealing ring (6), the sealing ring (6) is sleeved on the surface of the valve shaft (3).

4. The butterfly valve of claim 3, wherein: The side surface of the valve body (1) is welded with a flange (9).

5. The butterfly valve of claim 4, wherein: The side surface of the flange (9) is provided with an annular groove, and the annular groove is provided with a sealing gasket (10).

6. The butterfly valve of claim 5, wherein: The sealing ring (7), the sealing ring (6) and the sealing gasket (10) are made of flexible graphite material.

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