Butterfly valve with high sealing performance

Abstract

The utility model discloses a butterfly valve with high sealing performance, and relates to the technical field of butterfly valves. The butterfly valve with the high sealing performance comprises a butterfly valve body and a sealing structure, the sealing structure comprises a valve plate, a rotating rod, a first baffle, a second baffle, a first sealing gasket and a second sealing gasket, the valve plate is rotationally connected into the butterfly valve body, the rotating rod is fixedly connected into the valve plate, and the bottom of the rotating rod is rotationally connected with the inner wall of the butterfly valve body; the first baffle is fixedly connected into the butterfly valve body, the sealing gasket is arranged, the situation that the valve plate is only in contact with the inner wall of the butterfly valve body, and consequently the sealing performance is poor can be avoided, a gap between the valve plate and the butterfly valve body is further reduced, and the sealing performance is improved; through the arrangement of the sealing structure, the problems that a certain gap is likely to be generated when the valve plate and the valve body are in rigid contact for long-time use, the sealing performance is possibly reduced due to deformation of the valve plate, and use is not facilitated are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, and particularly relates to a butterfly valve with high sealing performance. Background Art

[0002] A butterfly valve is a simple structure regulating valve, mainly used for the on-off control of low-pressure pipeline media. The closing member (valve flap or butterfly plate) of the butterfly valve is disc-shaped, and rotates around the valve shaft to achieve the functions of opening and closing. This kind of valve can rotate around its own axis in the valve body, so as to achieve the purpose of opening and closing or adjusting. Butterfly valves are widely used in controlling the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media, and mainly play the role of cutting off and throttling in pipelines.

[0003] When most butterfly valves are in use, there are certain problems. When the butterfly valve is closed, it usually forms a sealed environment by the direct contact between the valve plate and the valve body. However, this method is difficult to ensure the high sealing performance between the valve plate and the valve body. Since most of the materials of the valve plate and the valve body are metal materials such as stainless steel or aluminum alloy, rigid contact between the valve plate and the valve body is likely to generate certain gaps after long-term use, and it may also cause the sealing performance to decrease due to the deformation of the valve plate, which is not conducive to use. Therefore, a butterfly valve with high sealing performance is needed. Summary of the Utility Model

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and provide a butterfly valve with high sealing performance, which can solve the problems that rigid contact between the valve plate and the valve body is likely to generate certain gaps after long-term use, and it may also cause the sealing performance to decrease due to the deformation of the valve plate, which is not conducive to use.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A butterfly valve with high sealing performance, including a butterfly valve body and a sealing structure. The sealing structure includes a valve plate, a rotating rod, a first baffle, a second baffle, a first sealing pad and a second sealing pad. The valve plate is rotatably connected inside the butterfly valve body. The rotating rod is fixedly connected inside the valve plate. The bottom of the rotating rod is rotatably connected to the inner wall of the butterfly valve body. The first baffle is fixedly connected inside the butterfly valve body. The second baffle is fixedly connected inside the butterfly valve body. The first baffle and the second baffle are completely the same and are respectively located on both sides of the valve plate. The number of the first sealing pads is two and they are respectively arranged on the surfaces of the first baffle and the second baffle. The number of the second sealing pads is two and they are both arranged on the surface of the valve plate. Both of the two second sealing pads are in contact with the corresponding first sealing pads. The shape and size of the second sealing pads are completely the same as those of the first sealing pads.

[0006] Preferably, an installation part is fixedly connected to the top of the butterfly valve body. A housing is fixedly connected to the top of the installation part. A motor housing is fixedly connected to one side of the housing.

[0007] Preferably, a motor is fixedly connected inside the motor housing, and a first bevel gear is fixedly connected to the output end of the motor.

[0008] Preferably, a second bevel gear is rotatably connected inside the housing, a rotating rod passes through the mounting member and is fixedly connected to the second bevel gear, and the second bevel gear is meshed with the first bevel gear.

[0009] Preferably, mounting plates are fixedly connected to both sides of the butterfly valve body, and a plurality of threaded holes are equidistantly formed on the surfaces of the two mounting plates in a circular array.

[0010] Preferably, a plurality of sound-absorbing grooves are formed on the surface of the butterfly valve body.

[0011] Compared with the prior art, the beneficial effects of the present utility model are:

[0012] 1. For this butterfly valve with high sealing performance, the setting of the sealing gasket can prevent the valve plate from only contacting the inner wall of the butterfly valve body, thus avoiding the situation of poor sealing performance. It further reduces the gap between the valve plate and the butterfly valve body and increases the sealing performance. The setting of the sealing structure solves the problem that a certain gap is likely to be generated due to the rigid contact between the valve plate and the valve body during long-term use, and the sealing performance may also be reduced due to the deformation of the valve plate, which is not conducive to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present utility model will be further described below with reference to the drawings and embodiments:

[0014] Figure 1 is a schematic diagram of the body of the present utility model;

[0015] Figure 2 is a schematic diagram of the inside of the housing of the present utility model;

[0016] Figure 3 is a schematic diagram of the closed state of the present utility model;

[0017] Figure 4 is a schematic diagram of the open state of the present utility model;

[0018] Figure 5 is a schematic diagram of the sealing structure of the present utility model.

[0019] Reference numerals: 1. Butterfly valve body; 2. Mounting plate; 3. Threaded hole; 4. Valve plate; 5. Mounting member; 6. Housing; 7. Motor housing; 8. Motor; 9. First bevel gear; 10. Second bevel gear; 11. Rotating rod; 12. First baffle; 13. Second baffle; 14. First sealing gasket; 15. Second sealing gasket; 16. Sound-absorbing groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The role of the accompanying drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model. However, it should not be construed as a limitation on the protection scope of the present utility model.

[0021] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present utility model.

[0022] In the description of the present utility model, "greater than", "less than", "exceeding", etc. are understood as not including the number itself, and "above", "below", "within", etc. are understood as including the number itself. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0023] In the description of the present utility model, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0024] Please refer to Figures 1-5, the present utility model provides a technical solution: a butterfly valve with high sealing performance, including a butterfly valve body 1 and a sealing structure. The sealing structure includes a valve plate 4, a rotating rod 11, a first baffle 12, a second baffle 13, a first gasket 14 and a second gasket 15. The valve plate 4 is rotatably connected inside the butterfly valve body 1. The rotating rod 11 is fixedly connected inside the valve plate 4, and the bottom of the rotating rod 11 is rotatably connected to the inner wall of the butterfly valve body 1. The first baffle 12 is fixedly connected inside the butterfly valve body 1, and the second baffle 13 is fixedly connected inside the butterfly valve body 1. The first baffle 12 and the second baffle 13 are exactly the same and are respectively located on both sides of the valve plate 4. The number of the first gaskets 14 is two and they are respectively arranged on the surfaces of the first baffle 12 and the second baffle 13. The number of the second gaskets 15 is two and they are both arranged on the surface of the valve plate 4. The two second gaskets 15 are both in contact with the corresponding first gaskets 14. The shape and size of the second gasket 15 are exactly the same as those of the first gasket 14. When the butterfly valve is in the closed state, the valve plate 4 rotates and contacts the first baffle 12 and the second baffle 13. The second gaskets 15 arranged on the valve plate 4 are in contact with the first gaskets 14 arranged on the first baffle 12 and the second baffle 13. The materials of the first gasket 14 and the second gasket 15 are non-metallic rubber gaskets, which have good high and low temperature resistance while ensuring the sealing performance, increasing the service life. The setting of the gaskets can prevent the valve plate 4 from only contacting the inner wall of the butterfly valve body 1, thus causing poor sealing performance, further reducing the gap between the valve plate 4 and the butterfly valve body 1, and increasing the sealing performance. The setting of the sealing structure solves the problem that rigid contact between the valve plate and the valve body is likely to generate a certain gap during long-term use, and it may also cause a decrease in sealing performance due to the deformation of the valve plate, which is not conducive to use.

[0025] Furthermore, an installation part 5 is fixedly connected to the top of the butterfly valve body 1. An outer shell 6 is fixedly connected to the top of the installation part 5. A motor housing 7 is fixedly connected to one side of the outer shell 6. A motor 8 is fixedly connected inside the motor housing 7. The output end of the motor 8 is fixedly connected with a first bevel gear 9. A second bevel gear 10 is rotatably connected inside the outer shell 6. The rotating rod 11 passes through the installation part 5 and is fixedly connected with the second bevel gear 10. The second bevel gear 10 is meshed with the first bevel gear 9. Installation plates 2 are fixedly connected to both sides of the butterfly valve body 1. A plurality of threaded holes 3 are equidistantly arranged on the surfaces of the two installation plates 2 in a circular array manner. A plurality of sound-absorbing grooves 16 are arranged on the surface of the butterfly valve body 1. The sound-absorbing grooves 16 can, to a certain extent, reduce the noise generated by the liquid flow when the liquid flows inside the butterfly valve body 1 through the cavity structure. By driving the first bevel gear 9 to rotate through the motor 8, the first bevel gear 9 drives the second bevel gear 10 to rotate, and then the rotating rod 11 can be driven to rotate. The rotation of the rotating rod 11 enables the valve plate 4 to rotate on the inner wall of the butterfly valve body 1, thereby controlling the opening and closing state of the butterfly valve. Compared with manually controlling the opening and closing of the butterfly valve, it is more convenient to use and has a higher degree of automation.

[0026] Working principle: The first bevel gear 9 is driven to rotate by the motor 8, and the first bevel gear 9 drives the second bevel gear 10 to rotate, which can drive the rotating rod 11 to rotate. The rotation of the rotating rod 11 enables the valve plate 4 to rotate on the inner wall of the butterfly valve body 1, thereby controlling the opening and closing state of the butterfly valve. Compared with manually controlling the opening and closing of the butterfly valve, it is more convenient to use and has a higher degree of automation. When the butterfly valve is in the closed state, the valve plate 4 rotates and contacts the first baffle 12 and the second baffle 13. The second gasket 15 provided on the valve plate 4 contacts the first gasket 14 provided on the first baffle 12 and the second baffle 13. The materials of the first gasket 14 and the second gasket 15 are non-metallic rubber gaskets, which have good high and low temperature resistance while ensuring the sealing performance, increasing the service life. The setting of the gaskets can prevent the valve plate 4 from only contacting the inner wall of the butterfly valve body 1, thus causing poor sealing performance, further reducing the gap between the valve plate 4 and the butterfly valve body 1, and increasing the sealing performance.

[0027] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various changes can be made without departing from the purpose of the present invention.

Claims

1. A butterfly valve with high sealing performance, characterized in that, Comprising: A butterfly valve body (1); A sealing structure, which includes a valve plate (4), a rotating rod (11), a first baffle (12), a second baffle (13), a first gasket (14) and a second gasket (15). The valve plate (4) is rotatably connected inside the butterfly valve body (1), the rotating rod (11) is fixedly connected inside the valve plate (4), the bottom of the rotating rod (11) is rotatably connected to the inner wall of the butterfly valve body (1), the first baffle (12) is fixedly connected inside the butterfly valve body (1), the second baffle (13) is fixedly connected inside the butterfly valve body (1), the first baffle (12) and the second baffle (13) are exactly the same and are respectively located on both sides of the valve plate (4). The number of the first gaskets (14) is two and they are respectively arranged on the surfaces of the first baffle (12) and the second baffle (13). The number of the second gaskets (15) is two and they are both arranged on the surface of the valve plate (4). The two second gaskets (15) are both in contact with the corresponding first gaskets (14), and the shape and size of the second gaskets (15) are exactly the same as those of the first gaskets (14).

2. The butterfly valve with high sealing performance according to claim 1, characterized in that, An installation part (5) is fixedly connected to the top of the butterfly valve body (1), a housing (6) is fixedly connected to the top of the installation part (5), and a motor housing (7) is fixedly connected to one side of the housing (6).

3. A butterfly valve with high sealing performance according to claim 2, characterized in that, A motor (8) is fixedly connected inside the motor housing (7), and a first bevel gear (9) is fixedly connected to the output end of the motor (8).

4. A butterfly valve with high sealing performance according to claim 2, characterized in that, A second bevel gear (10) is rotatably connected inside the housing (6), the rotating rod (11) penetrates through the installation part (5) and is fixedly connected to the second bevel gear (10), and the second bevel gear (10) is meshed with the first bevel gear (9).

5. A butterfly valve with high sealing performance according to claim 1, characterized in that, Installation plates (2) are fixedly connected to both sides of the butterfly valve body (1), and a plurality of threaded holes (3) are equidistantly arranged on the surfaces of the two installation plates (2) in a circular array.

6. A butterfly valve with high sealing performance according to claim 1, characterized in that A number of sound-absorbing grooves (16) are formed on the surface of the butterfly valve body (1).

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