Butterfly valve with good sealing performance

Abstract

The utility model discloses a butterfly valve with good sealing performance, and relates to the technical field of sealing forming or configuration. The butterfly valve with the good sealing performance comprises a valve body, the interior of the valve body is rotationally connected with a valve plate, the outer surface of the valve plate is fixedly sleeved with a sealing ring, the sealing ring makes contact with the inner wall of the valve body, the upper side of the outer surface of the valve body is fixedly connected with a first valve shell, and the upper side of the first valve shell is connected with a second valve shell; the outer surface of the first valve shell and the outer surface of the second valve shell are fixedly sleeved with first flanges, a bolt is fixedly connected between the two first flanges, a valve rod is installed on the upper side of the second valve shell, the outer surface of the valve body is fixedly sleeved with two second flanges, the butterfly valve and a pipeline are connected together through the two second flanges, and a sealing mechanism is arranged in the valve body. In this way, impact borne by the valve plate can be shared, then the impact force borne by the valve plate is reduced, the valve plate is not prone to deformation due to impact, and the sealing effect of the butterfly valve is improved.

Description

Technical Field

[0001] This utility model relates to the field of sealing forming or configuration technology, specifically a butterfly valve with good sealing performance. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve used for on / off control of low-pressure pipeline media. A butterfly valve is a type of valve where the closing element is a disc that rotates around a valve shaft to open and close. Butterfly valves can control the flow of various types of fluids, including air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media. In pipelines, they primarily function as shut-off and throttling devices. The butterfly valve's opening and closing element is a disc-shaped valve plate that rotates around its own axis within the valve body to achieve opening, closing, or regulation.

[0003] When a butterfly valve needs to be closed during use, the valve plate will still be impacted by the medium being transported in the pipeline after the valve plate is closed. After being impacted for a long time, the valve plate will deform. After deformation, the periphery of the valve plate will not be able to completely fit with the inner wall of the valve body. As a result, the fluid in the pipeline can pass through the gap between the valve plate and the inner wall of the valve body, which will reduce the sealing effect of the butterfly valve. Utility Model Content

[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a butterfly valve with good sealing performance, which has the function of distributing the impact on the valve plate, thereby reducing the impact force on the valve plate, making the valve plate less prone to deformation due to impact, and improving the sealing effect of the butterfly valve.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a butterfly valve with good sealing performance, comprising a valve body, a valve plate rotatably connected inside the valve body, a sealing ring fixedly sleeved on the outer surface of the valve plate, and the sealing ring contacting the inner wall of the valve body;

[0006] A first valve shell is fixedly connected to the upper side of the outer surface of the valve body, a second valve shell is connected to the upper side of the first valve shell, a valve stem is installed on the upper side of the second valve shell, and a sealing mechanism is provided inside the valve body. The sealing mechanism can distribute the impact force on the valve plate and improve the sealing effect of the first valve shell.

[0007] The sealing mechanism includes two stops, two sealing gaskets, two first support rods, two sets of second support rods, a sealing ring groove, and a sealing ring.

[0008] Preferably, a first flange is fixedly fitted onto the outer surface of both the first valve body and the second valve body, and bolts are fixedly connected between the two first flanges.

[0009] Two second flanges are fixedly fitted onto the outer surface of the valve body.

[0010] Preferably, the lower end of the valve stem extends rotatably through the second valve housing and the first valve housing, and the lower end of the valve stem extends rotatably into the interior of the valve body;

[0011] The lower end of the valve stem passes through the valve plate, and the valve stem and valve plate are fixedly connected. The lower end of the valve stem is rotatably connected to the bottom wall of the valve body.

[0012] Preferably, both of the stops are fixedly connected to the inner wall of the valve body, and the two stops are respectively located on the front and rear sides of the valve plate;

[0013] The two stops are rotatably arranged, and both stops are smaller than semicircles, so that the valve plate will not interfere with the movement of the stops when it rotates.

[0014] Preferably, the sides of the two blocks that are far apart from each other are both arc-shaped surfaces, and the two sealing gaskets are respectively fixedly connected to the opposite surfaces of the two blocks;

[0015] Both sealing gaskets are in contact with the valve plate, and the two first support rods are fixedly connected to the two stops respectively.

[0016] Preferably, the two sets of second support rods are fixedly connected to the two first support rods on opposite sides, and the opposite ends of the two sets of second support rods are fixedly connected to the two stops.

[0017] Preferably, the sealing ring groove is formed inside the first valve housing, the sealing ring is fixedly sleeved on the outer surface of the valve stem, and the sealing ring is rotatably connected inside the sealing ring groove.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] (1) The butterfly valve with good sealing performance can share the impact on the valve plate, thereby reducing the impact force on the valve plate and making the valve plate less prone to deformation due to impact, thus improving the sealing effect of the butterfly valve.

[0020] (2) The sealing ring of this butterfly valve with good sealing performance can seal the connection between the valve stem and the first valve body, thereby preventing the liquid inside the valve body from leaking out through the gap between the valve stem and the first valve body, and further improving the sealing performance of the butterfly valve. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0022] Figure 1 This is a schematic diagram of a butterfly valve with good sealing performance according to the present invention;

[0023] Figure 2 This is a schematic diagram of the cross-sectional connection structure between the valve body and the valve shell of this utility model;

[0024] Figure 3 This is a schematic diagram of the block connection structure of this utility model;

[0025] Figure 4 for Figure 2 Enlarged diagram of point A.

[0026] Reference numerals in the attached drawings: 1. Valve body; 2. Valve plate; 3. Sealing ring; 4. First valve housing; 5. Second valve housing; 6. First flange; 7. Bolt; 8. Valve stem; 9. Second flange; 10. Stop block; 11. Sealing gasket; 12. First support rod; 13. Second support rod; 14. Sealing ring groove; 15. Sealing ring. Detailed Implementation

[0027] 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 purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] Please see Figure 1-4This utility model provides a new technical solution: a butterfly valve with good sealing performance, including a valve body 1, a valve plate 2 rotatably connected inside the valve body 1, a sealing ring 3 fixedly sleeved on the outer surface of the valve plate 2, the sealing ring 3 contacting the inner wall of the valve body 1, a first valve shell 4 fixedly connected to the upper side of the outer surface of the valve body 1, a second valve shell 5 connected to the upper side of the first valve shell 4, a first flange 6 fixedly sleeved on the outer surface of both the first valve shell 4 and the second valve shell 5, and a bolt 7 fixedly connected between the two first flanges 6, a valve stem 8 installed on the upper side of the second valve shell 5, the lower end of the valve stem 8 rotatably extending through the second valve shell 5 and the first valve shell 4, the lower end of the valve stem 8... The valve stem 8 extends into the interior of the valve body 1. The lower end of the valve stem 8 passes through the valve plate 2, and the valve stem 8 and the valve plate 2 are fixedly connected. The lower end of the valve stem 8 is rotatably connected to the bottom wall of the valve body 1. Two second flanges 9 are fixedly fitted on the outer surface of the valve body 1. The butterfly valve is connected to the pipeline through the two second flanges 9. A sealing mechanism is provided inside the valve body 1. The sealing mechanism can distribute the impact force on the valve plate 2 and improve the sealing effect of the first valve shell 4. The sealing mechanism includes two stops 10, two sealing gaskets 11, two first support rods 12, two sets of second support rods 13, sealing ring groove 14, and sealing ring 15.

[0032] Furthermore, both stops 10 are fixedly connected to the inner wall of the valve body 1. The two stops 10 are respectively set on the front and rear sides of the valve plate 2. The two stops 10 are rotatably set. Both stops 10 are smaller than semicircles, so that the valve plate 2 will not interfere with the movement of the stops 10 when it rotates. The sides of the two stops 10 that are far apart from each other are arc-shaped surfaces. Two sealing gaskets 11 are fixedly connected to the opposite surfaces of the two stops 10. Both sealing gaskets 11 are in contact with the valve plate 2. Two first support rods 12 are fixedly connected to the two stops 10. Two sets of second support rods 13 are fixedly connected to the sides of the two first support rods 12 that are far apart from each other. The ends of the two sets of second support rods 13 that are far apart from each other are fixedly connected to the two stops 10. The sealing ring groove 14 is opened inside the first valve shell 4. The sealing ring 15 is fixedly sleeved on the outer surface of the valve stem 8. The sealing ring 15 is rotatably connected inside the sealing ring groove 14.

[0033] Furthermore, at the start of operation, the operator rotates the valve stem 8 counterclockwise, causing the valve plate 2 and sealing ring 3 to rotate synchronously. This opens the valve body 1, allowing fluid to flow through. Then, rotating the valve stem 8 clockwise closes the valve plate 2 and sealing ring 3, preventing fluid from passing through the valve body 1. At this point, the sealing ring 3 contacts the inner wall of the valve body 1, ensuring a tight seal after closure. Simultaneously, the two stops 10 contact the valve plate 2, and the two sealing gaskets 11 on the stops 10 adhere to the valve plate 2, further sealing it and improving its sealing performance. The sealing ring 15 ensures the internal sealing of the valve body 1. When the valve plate 2 is impacted, the stop block 10, the first support rod 12, and the second support rod 13 come into contact with the valve plate 2, thus distributing the impact on the valve plate 2. This reduces the impact force on the valve plate 2, making it less prone to deformation due to impact, thereby ensuring the sealing effect of the valve plate 2. At the same time, the sealing ring 15 can seal the connection between the valve stem 8 and the first valve shell 4, thereby preventing liquid inside the valve body 1 from leaking out through the gap between the valve stem 8 and the first valve shell 4, further improving the sealing performance of the butterfly valve.

[0034] Furthermore, in this way, the impact on valve plate 2 can be distributed, thereby reducing the impact force on valve plate 2 and making it less prone to deformation due to impact, thus improving the sealing effect of the butterfly valve.

[0035] Structural Description: Valve Body 1: As the main structure of the butterfly valve, it provides the mounting base for other components and forms a fluid channel inside. The flow and cut-off of fluid are controlled by the rotation of the valve plate 2.

[0036] Valve plate 2: It rotates inside the valve body 1. By rotating, it changes its own position, thereby controlling the opening and closing of the fluid passage inside the valve body 1, and realizing the control of fluid flow.

[0037] Sealing ring 3: It is fixedly sleeved on the outer surface of valve plate 2 and contacts the inner wall of valve body 1. When valve plate 2 is closed, it plays a sealing role to prevent fluid leakage.

[0038] First valve housing 4: Fixedly connected to the upper side of the outer surface of valve body 1, providing installation space for components such as valve stem 8, and cooperating with second valve housing 5 to protect internal components.

[0039] Second valve housing 5: Connected to the upper side of first valve housing 4, forming a protective space together with first valve housing 4, mounting components such as valve stem 8, and fixedly connected to first valve housing 4 through first flange 6 and bolts 7.

[0040] First flange 6: It is fixedly sleeved on the outer surface of the first valve body 4 and the second valve body 5 respectively, and the first valve body 4 and the second valve body 5 are fixedly connected together by bolts 7 to ensure the connection strength and sealing between the two.

[0041] Bolt 7: Securely connects the two first flanges 6, ensuring a tight connection between the first valve body 4 and the second valve body 5, thus guaranteeing the overall stability and sealing of the valve body.

[0042] Valve stem 8: Installed on the upper side of the second valve housing 5, its lower end extends rotatably through the second valve housing 5 and the first valve housing 4, enters the interior of the valve body 1, penetrates the valve plate 2, and is rotatably connected to the bottom wall of the valve body 1. By rotating the valve stem 8, the valve plate 2 is rotated, thereby controlling the opening and closing of the butterfly valve.

[0043] Second flange 9: It is fixedly sleeved on the outer surface of valve body 1. The butterfly valve is connected to the pipeline through two second flanges 9, so as to realize the installation of butterfly valve in pipeline system.

[0044] Stop 10: There are two stop blocks 10, both fixedly connected to the inner wall of the valve body 1, respectively set on the front and rear sides of the valve plate 2. They are rotatably arranged and have a structure smaller than a semicircle to avoid motion interference with the rotating valve plate 2. The side of the stop blocks 10 that is far apart from each other is an arc-shaped surface, and a sealing gasket 11 is fixedly connected to its opposite surface, which contacts the valve plate 2 to share the impact force on the valve plate 2. At the same time, the sealing gasket 11 further improves the sealing performance inside the valve body 1.

[0045] Sealing gasket 11: There are two sealing gaskets 11, which are fixedly connected to the opposite surfaces of the two stops 10 and in contact with the valve plate 2. When the valve plate 2 is closed, they further enhance the sealing effect between the valve plate 2 and the stops 10 to prevent fluid leakage.

[0046] First support rod 12: There are two first support rods 12, which are fixedly connected to the two stops 10 respectively, and play the role of supporting the stops 10, enhancing the structural stability of the stops 10, and sharing the impact force on the valve plate 2 together with the stops 10.

[0047] Second support rod 13: There are two sets of second support rods 13, which are fixedly connected to the two first support rods 12 on opposite sides. The opposite ends of the two sets of second support rods 13 are fixedly connected to the two stops 10. This further enhances the structural stability of the stops 10 and the first support rods 12, and shares the impact force on the valve plate 2 with the stops 10 and the first support rods 12.

[0048] Sealing ring groove 14: It is formed inside the first valve body 4 to provide space for the installation and rotation of the sealing ring 15, and to ensure the sealing of the valve stem 8 during rotation.

[0049] Sealing ring 15: It is fixedly sleeved on the outer surface of the valve stem 8 and rotatably connected inside the sealing ring groove 14. During the rotation of the valve stem 8, it ensures the sealing between the valve stem 8 and the first valve body 4 and prevents fluid from leaking from the connection between the valve stem 8 and the first valve body 4.

[0050] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A butterfly valve with good sealing performance, comprising a valve body (1), a valve plate (2) is rotatably connected inside the valve body (1), and a sealing ring (3) is fixedly sleeved on the outer surface of the valve plate (2), the sealing ring (3) being in contact with the inner wall of the valve body (1); A first valve shell (4) is fixedly connected to the upper side of the outer surface of the valve body (1), a second valve shell (5) is connected to the upper side of the first valve shell (4), and a valve stem (8) is installed on the upper side of the second valve shell (5). The valve body (1) is characterized by the following features: The valve body (1) is provided with a sealing mechanism inside. The sealing mechanism can distribute the impact force on the valve plate (2) and improve the sealing effect of the first valve shell (4). The sealing mechanism includes two stops (10), two sealing gaskets (11), two first support rods (12), two sets of second support rods (13), a sealing ring groove (14), and a sealing ring (15).

2. The butterfly valve with good sealing performance according to claim 1, characterized in that: The outer surfaces of the first valve housing (4) and the second valve housing (5) are both fixedly fitted with first flanges (6), and bolts (7) are fixedly connected between the two first flanges (6). Two second flanges (9) are fixedly sleeved on the outer surface of the valve body (1).

3. The butterfly valve with good sealing performance according to claim 1, characterized in that: The lower end of the valve stem (8) extends through the second valve housing (5) and the first valve housing (4), and the lower end of the valve stem (8) extends into the interior of the valve body (1). The lower end of the valve stem (8) passes through the valve plate (2), and the valve stem (8) and the valve plate (2) are fixedly connected. The lower end of the valve stem (8) is rotatably connected to the bottom wall of the valve body (1).

4. The butterfly valve with good sealing performance according to claim 1, characterized in that: Both of the aforementioned stops (10) are fixedly connected to the inner wall of the valve body (1), and the two stops (10) are respectively located on the front and rear sides of the valve plate (2); The two stops (10) are rotatably set, and both stops (10) are smaller than semicircles, so that the valve plate (2) will not interfere with the movement of the stops (10) when it rotates.

5. A butterfly valve with good sealing performance according to claim 4, characterized in that: The two blocks (10) are both arc-shaped on the side away from each other, and the two sealing gaskets (11) are respectively fixedly connected to the opposite surfaces of the two blocks (10); Both sealing gaskets (11) are in contact with the valve plate (2), and the two first support rods (12) are fixedly connected to the two stops (10) respectively.

6. A butterfly valve with good sealing performance according to claim 1, characterized in that: The two sets of second support rods (13) are fixedly connected to the two first support rods (12) on opposite sides, and the opposite ends of the two sets of second support rods (13) are fixedly connected to the two stops (10).

7. A butterfly valve with good sealing performance according to claim 1, characterized in that: The sealing ring groove (14) is opened inside the first valve body (4), and the sealing ring (15) is fixedly sleeved on the outer surface of the valve stem (8). The sealing ring (15) is rotatably connected inside the sealing ring groove (14).

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