Pneumatic eccentric inflatable sealing ceramic butterfly valve

Abstract

According to the technical scheme, the pneumatic eccentric type inflatable sealing ceramic butterfly valve is characterized by comprising a butterfly valve body and a pneumatic head assembly, a butterfly valve plate, an upper valve rod and a lower valve rod are arranged in the butterfly valve body, the upper valve rod and the lower valve rod are fixedly connected with the upper end and the lower end of the butterfly valve plate, and an inflatable valve seat is further arranged in the butterfly valve body. A butterfly valve end cover is pressed outside the inflatable valve seat, a hollow inflation cavity is formed in the inflatable valve seat, when the inflation cavity is inflated, the inflatable valve seat expands towards one side of the butterfly valve plate, so that the inflatable valve seat and the butterfly valve plate abut against each other, when the inflation cavity is deflated, a gap exists between the inflatable valve seat and the butterfly valve plate, and the inflatable valve seat and the butterfly valve plate do not make contact with each other. The cross section of the inflation cavity is of a vault-shaped structure. The inflatable butterfly valve has the advantages that the inflatable valve seat expands during inflation, the inflatable valve seat and the butterfly valve plate abut against each other, the sealing performance of the valve is guaranteed, the inflatable valve seat and the butterfly valve plate have a gap during deflation and do not make contact with each other and are not abraded, and the service life of the valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a pneumatic eccentric inflatable sealing ceramic butterfly valve. Background Art

[0002] Eccentric butterfly valves are categorized as single, double, triple, and variable eccentric. Unlike concentric butterfly valves, eccentric butterfly valves feature a stem axis offset from both the disc and body centers, and feature an oblique tapered sealing pair. The butterfly valve and upper and lower valve shafts are connected using a special-shaped hole and shaft, allowing the disc to float up and down, left and right, without a pin during opening and closing. A simple regulating valve, the butterfly valve can be used to control the flow of various fluids, including air, water, steam, various corrosive media, mud, and oil. It boasts a simple structure, compact size, light weight, easy operation, and excellent fluid control.

[0003] However, the use of butterfly valves on the market in powder working conditions generally causes the valve seat and valve plate of the butterfly valve to be severely worn, resulting in a short service life. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a pneumatic eccentric inflatable sealed ceramic butterfly valve, which has an inflatable valve seat that expands when inflated, and the inflatable valve seat and the butterfly valve plate abut against each other to ensure the valve sealing performance. When deflated, there is a gap between the inflatable valve seat and the butterfly valve plate, and they do not contact each other and wear each other, thereby extending the service life of the valve.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a pneumatic eccentric inflatable sealing ceramic butterfly valve, comprising a butterfly valve body and a pneumatic head assembly located above the butterfly valve body, a butterfly valve plate and an upper valve stem and a lower valve stem fixedly connected to the upper and lower ends of the butterfly valve plate are arranged in the butterfly valve body, and an inflatable valve seat adapted for the butterfly valve plate is also arranged in the butterfly valve body, the inflatable valve seat is press-fitted with a butterfly valve end cover fixedly connected to the butterfly valve body, a hollow inflatable cavity is arranged inside the inflatable valve seat, and the inflatable valve seat is made of elastic material. When the inflatable cavity is inflated, the inflatable valve seat expands toward one side of the butterfly valve plate, so that the inflatable valve seat and the butterfly valve plate abut against each other. When the inflatable cavity is deflated, there is a gap between the inflatable valve seat and the butterfly valve plate and they do not contact each other. The cross section of the inflatable cavity is arranged in a dome-shaped structure, and the top of the dome faces one side of the butterfly valve plate.

[0006] By adopting the above technical solution, when the inflatable valve seat is inflated, the inflatable valve seat expands and abuts against the butterfly valve plate, ensuring the overall sealing of the valve. When deflated, the inflatable valve seat shrinks and moves away from the butterfly valve plate so that the two do not contact each other, thereby reducing the wear between the inflatable valve seat and the butterfly valve plate and extending the service life of the entire valve.

[0007] The utility model is further configured as follows: the inflatable valve seat and the butterfly valve plate are respectively provided with matching valve seat sealing bevels and valve plate sealing bevels, a sealing gap is formed between the valve seat sealing bevel and the valve plate sealing bevel, when the inflatable valve seat is inflated, the valve seat sealing bevel and the valve plate sealing bevel are abutted and connected to each other, and the sealing gap is 0, when the inflatable valve seat is not inflated, the size of the sealing gap is set to 0.5 to 0.8 mm.

[0008] By adopting the above technical solution, the sealing gap changes due to the inflation and deflation state of the inflatable valve seat, thereby reducing the wear between the inflatable valve seat and the butterfly valve plate and extending the service life of the entire valve.

[0009] The utility model is further configured as follows: the butterfly valve body and the butterfly valve end cover are respectively provided with a valve body annular groove and an end cover annular groove that are compatible with the inflatable valve seat, the valve body annular groove and the end cover annular groove cooperate with each other to form a valve seat mounting groove, the end cover annular groove is also provided with an annular limiting groove that is compatible with the inflatable valve seat, and the inflatable valve seat is fixedly connected to the side of the butterfly valve end cover with an annular limiting strip that is compatible with the annular limiting groove.

[0010] By adopting the above technical solution, the annular limit strip and the annular limit groove cooperate with each other to play a limiting role, which can prevent the inflatable valve seat from shifting due to deformation during the inflation and deflation process, thereby ensuring the reliability of the inflatable valve seat.

[0011] The utility model is further configured as follows: an inflation connector compatible with the inflatable valve seat is inserted into one end of the butterfly valve end cover, the inflation connector is fixedly connected to the pneumatic head assembly by setting an inflation pipe, an inflation through hole compatible with the inflation connector is provided on the inflatable valve seat, a connector hose connected to the inflation connector is inserted into the inflation through hole, the inflation cavity is communicated with the inflation connector through the connector hose, the pneumatic head assembly is also provided with a filter pressure reducing valve and a solenoid valve compatible with the inflatable valve seat, and the inflation pipe is connected to the filter pressure reducing valve and the solenoid valve.

[0012] By adopting the above technical solution, the pneumatic head assembly inflates and deflates the inflation joint through the inflation tube, and then inflates and deflates the inflation cavity, thereby controlling the expansion and contraction of the inflatable valve seat during the inflation and deflation process. The pneumatic head assembly controls the inflation and deflation state of the inflation tube through the solenoid valve, and the filter pressure reducing valve is used to reduce the inflation pressure to avoid damage due to excessive air pressure in the inflation tube and the inflatable valve seat.

[0013] The utility model is further configured as follows: an upper mounting groove and a lower mounting groove adapted to the upper valve stem and the lower valve stem are respectively provided on the butterfly valve body; the upper valve stem is connected to the pneumatic head assembly via the upper mounting groove; a valve stem sealing ring sleeved on the upper valve stem is further provided in the upper mounting groove; a sealing ring groove adapted to the valve stem sealing ring is provided in the upper mounting groove.

[0014] By adopting the above technical solution, the valve stem sealing ring is used to improve the sealing performance of the connection between the upper valve stem and the butterfly valve body, thereby ensuring the sealing performance of the valve.

[0015] The utility model is further configured as follows: the surfaces of the butterfly valve plate, the butterfly valve end cover and the butterfly valve body are all sprayed with a nano-ceramic layer.

[0016] By adopting the above technical solution, the nano-ceramic layer is sprayed to improve the overall wear resistance and corrosion resistance, solving the problem that the butterfly valve is easily worn and corroded by the medium.

[0017] The utility model is further configured as follows: a safety relief valve adapted to the inflatable valve seat is inserted into the other end of the butterfly valve end cover, and the pressure relief safety valve is connected to the inflatable cavity in the inflatable valve seat.

[0018] By adopting the above technical solution, the pressure relief safety valve can avoid damage to the inflatable valve seat caused by excessive air pressure in the inflation chamber, thereby extending the service life of the entire valve.

[0019] In summary, the present invention has the following beneficial effects:

[0020] 1. When the inflatable valve seat is inflated, the inflatable valve seat expands and contacts the butterfly valve disc, ensuring the overall sealing of the valve. When the air is deflated, the inflatable valve seat contracts and moves away from the butterfly valve disc so that the two do not contact each other, thereby reducing the wear between the inflatable valve seat and the butterfly valve disc and extending the service life of the valve as a whole.

[0021] 2. The pneumatic head assembly inflates and deflates the air to the inflatable joint through the inflatable tube, and then inflates and deflates the air to the inflatable cavity, thereby controlling the expansion and contraction of the inflatable valve seat during the inflation and deflation process. The pneumatic head assembly controls the inflation and deflation status of the inflatable tube through the solenoid valve. The filter pressure reducing valve is used to reduce the inflation pressure to avoid damage to the inflatable tube and the inflatable valve seat due to excessive air pressure. The overall wear resistance and corrosion resistance are improved by spraying a nano-ceramic layer, solving the problem that the butterfly valve is easily eroded, worn and corroded by the medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of Example 1.

[0023] Figure 2 for Figure 1 A local enlarged schematic diagram of point I in the middle.

[0024] Figure 3 This is a structural diagram of Example 2.

[0025] Figure 4 This is a structural diagram of Example 3.

[0026] Figure 5 for Figure 4 A local enlarged schematic diagram of point II in the middle.

[0027] Figure markings: 1. Butterfly valve body; 11. Valve body annular groove; 12. Upper mounting groove; 13. Lower mounting groove; 14. Valve stem sealing ring; 15. Sealing ring groove; 2. Pneumatic head assembly; 21. Inflating pipe; 22. Filter pressure reducing valve; 23. Solenoid valve; 3. Butterfly valve plate; 31. Valve plate sealing slope; 4. Upper valve stem; 5. Lower valve stem; 6. Inflatable valve seat; 61. Inflatable cavity; 62. Valve seat sealing slope; 63. Annular limit strip; 64. Connector hose; 7. Butterfly valve end cover; 71. End cover annular groove; 72. Annular limit groove; 8. Inflating connector; 9. Safety relief valve. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below with reference to the accompanying drawings.

[0029] Example 1: This embodiment discloses a pneumatic eccentric inflatable sealing ceramic butterfly valve, such as Figure 1 As shown, it includes a butterfly valve body 1 and a pneumatic head assembly 2 located above the butterfly valve body 1, a butterfly valve plate 3 and an upper valve stem 4 and a lower valve stem 5 fixedly connected to the upper and lower ends of the butterfly valve plate 3 are arranged in the butterfly valve body 1, and an inflatable valve seat 6 adapted to the butterfly valve plate 3 is also arranged in the butterfly valve body 1, and a butterfly valve end cover 7 fixedly connected to the butterfly valve body 1 is pressed on the outside of the inflatable valve seat 6.

[0030] like Figure 1 and 2 As shown, a hollow inflation cavity 61 is provided inside the inflatable valve seat 6, and the inflatable valve seat 6 is made of elastic material. When the inflatable cavity 61 is inflated, the inflatable valve seat 6 expands toward the side of the butterfly valve plate 3, so that the inflatable valve seat 6 and the butterfly valve plate 3 abut against each other. When the inflatable cavity 61 is deflated, there is a gap between the inflatable valve seat 6 and the butterfly valve plate 3 and they do not contact each other. The cross-section of the inflatable cavity 61 is arranged in a dome-shaped structure, and the top of the dome faces the side of the butterfly valve plate 3. The dome-shaped structure facilitates the deformation of the inflatable valve seat 6 during inflation and deflation, so that the inflatable cavity 61 expands toward the side of the butterfly valve plate 3 when inflated, and shrinks away from the side of the butterfly valve plate 3 when deflated.

[0031] like Figure 2As shown, the inflatable valve seat 6 and the butterfly valve plate 3 are respectively provided with matching valve seat sealing bevels 62 and valve plate sealing bevels 31, and a sealing gap is formed between the valve seat sealing bevel 62 and the valve plate sealing bevel 31. When the inflatable valve seat 6 is inflated, the valve seat sealing bevel 62 and the valve plate sealing bevel 31 are abutted and connected to each other, and the sealing gap is 0. When the inflatable valve seat 6 is not inflated, the size of the sealing gap is set to 0.5 to 0.8 mm.

[0032] like Figure 2 As shown, the butterfly valve body 1 and the butterfly valve end cover 7 are respectively provided with a valve body annular groove 11 and an end cover annular groove 71 which are adapted to the inflatable valve seat 6. The valve body annular groove 11 and the end cover annular groove 71 cooperate with each other to form a valve seat mounting groove for installing and fixing the inflatable valve seat 6. The end cover annular groove 71 is also provided with an annular limiting groove 72 which is adapted to the inflatable valve seat 6. The inflatable valve seat 6 is fixedly connected to the side of the butterfly valve end cover 7 with an annular limiting strip 63 which is adapted to the annular limiting groove 72. The annular limiting strip 63 and the annular limiting groove 72 cooperate with each other to play a limiting role, which can prevent the inflatable valve seat 6 from shifting due to deformation during the inflation and deflation process, thereby ensuring the reliability of the inflatable valve seat 6.

[0033] like Figure 2 As shown, an inflation connector 8 adapted to the inflatable valve seat 6 is inserted into one end of the butterfly valve end cover 7. The inflation connector 8 is fixedly connected to the pneumatic head assembly 2 by setting an inflation pipe 21. An inflation through hole adapted to the inflation connector 8 is provided on the inflatable valve seat 6. A connector hose 64 connected to the inflation connector 8 is inserted into the inflation through hole. The inflation cavity 61 is communicated with the inflation connector 8 through the connector hose 64. The pneumatic head assembly 2 performs inflation and deflation actions on the inflation connector 8 through the inflation pipe 21, thereby The inflation cavity 61 is inflated and deflated, thereby controlling the expansion and contraction of the inflatable valve seat 6 during the inflation and deflation process. The pneumatic head assembly 2 is also provided with a filter pressure reducing valve 22 and a solenoid valve 23 adapted to the inflatable valve seat 6. The inflation pipe 21 is interconnected with the filter pressure reducing valve 22 and the solenoid valve 23. The pneumatic head assembly 2 controls the inflation and deflation state of the inflation pipe 21 through the solenoid valve 23. The filter pressure reducing valve 22 is used to reduce the inflation pressure to avoid damage to the inflation pipe 21 and the inflatable valve seat 6 due to excessive air pressure.

[0034] Its working process is as follows: when the valve is closed, the pneumatic head assembly 2 drives the upper valve stem 4 to rotate together with the butterfly valve plate 3, so that the butterfly valve plate 3 is in the closed position. At this time, the butterfly valve plate 3 and the inflatable valve seat 6 do not contact each other, that is, there is a sealing gap between the valve seat sealing slope 62 and the valve plate sealing slope 31. Then the pneumatic head assembly 2 inflates the inflatable valve seat 6 (compressed air is introduced into the inflation cavity 61), so that the inflatable valve seat 6 expands toward the side of the butterfly valve plate 3 until the inflatable valve seat 6 is inflated. The valve seat 6 and the butterfly valve plate 3 abut against each other, that is, the valve seat sealing bevel 62 and the valve plate sealing bevel 31 abut against each other, the sealing gap is 0, and the valve completes the closing action; when the valve is opened, the inflatable valve seat 6 deflates outwards through the inflation tube 21, thereby causing the inflatable valve seat 6 to shrink and rebound to the side away from the butterfly valve plate 3 until the inflatable valve seat 6 and the butterfly valve plate 3 are no longer in contact with each other, and the pneumatic head assembly 2 drives the upper valve stem 4 and the butterfly valve plate 3 to rotate to the open position, and the valve completes the opening action.

[0035] Example 2: This example is based on Example 1. Figure 3 As shown, the butterfly valve body 1 is provided with an upper mounting groove 12 and a lower mounting groove 13 which are adapted to the upper valve stem 4 and the lower valve stem 5 respectively. The upper valve stem 4 is connected to the pneumatic head assembly 2 through the upper mounting groove 12. A valve stem sealing ring 14 is also provided in the upper mounting groove 12 and is sleeved on the upper valve stem 4. A sealing ring groove 15 which is adapted to the valve stem sealing ring 14 is provided in the upper mounting groove 12. The sealing ring adopts, and the valve stem sealing ring 14 is used to improve the sealing of the connection between the upper valve stem 4 and the butterfly valve body 1 to ensure the sealing performance of the valve. The upper mounting groove 12 is set as a through hole, and the lower mounting groove 13 is a blind hole.

[0036] The surfaces of the butterfly valve plate 3, the butterfly valve end cover 7 and the butterfly valve body 1 are all sprayed with a nano-ceramic layer. By spraying the nano-ceramic layer, the overall wear resistance and corrosion resistance are improved, solving the problem that the butterfly valve is easily eroded, worn and corroded by the medium.

[0037] Example 3: This example is based on Example 1 or 2. Figure 4 and 5 As shown, the other end of the butterfly valve end cover 7 is interspersed with a safety relief valve 9 that is compatible with the inflatable valve seat 6. The pressure relief safety valve is connected to the inflatable cavity 61 in the inflatable valve seat 6. The butterfly valve end cover 7 is provided with a pressure relief mounting hole and an inflating mounting hole that are respectively compatible with the safety pressure relief valve and the inflating connector 8. The pressure relief mounting hole and the inflating mounting hole are respectively fixedly connected to the safety pressure relief valve and the inflating connector 8 by threads. The pressure relief safety valve can prevent the inflatable valve seat 6 from being damaged due to excessive air pressure in the inflatable cavity 61, thereby extending the service life of the entire valve.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pneumatic eccentric inflatable sealing ceramic butterfly valve, comprising a butterfly valve body (1) and a pneumatic head assembly (2) located above the butterfly valve body (1), a butterfly valve plate (3) and an upper valve stem (4) and a lower valve stem (5) fixedly connected to the upper and lower ends of the butterfly valve plate (3) are arranged in the butterfly valve body (1), and is characterized in that: The butterfly valve body (1) is further provided with an inflatable valve seat (6) adapted to the butterfly valve plate (3), and a butterfly valve end cover (7) fixedly connected to the butterfly valve body (1) is pressed onto the outside of the inflatable valve seat (6). A hollow inflatable cavity (61) is provided inside the inflatable valve seat (6), and the inflatable valve seat (6) is made of elastic material. When the inflatable cavity (61) is inflated, the inflatable valve seat (6) expands toward one side of the butterfly valve plate (3), so that the inflatable valve seat (6) and the butterfly valve plate (3) abut against each other. When the inflatable cavity (61) is deflated, a gap exists between the inflatable valve seat (6) and the butterfly valve plate (3) and they do not contact each other. The cross section of the inflatable cavity (61) is arranged in a dome-shaped structure, and the top of the dome faces one side of the butterfly valve plate (3).

2. The pneumatic eccentric inflatable sealing ceramic butterfly valve according to claim 1, characterized in that: The inflatable valve seat (6) and the butterfly valve plate (3) are respectively provided with a matching valve seat sealing inclined surface (62) and a valve plate sealing inclined surface (31), and a sealing gap is formed between the valve seat sealing inclined surface (62) and the valve plate sealing inclined surface (31). When the inflatable valve seat (6) is inflated, the valve seat sealing inclined surface (62) and the valve plate sealing inclined surface (31) are in contact with each other, and the sealing gap is 0. When the inflatable valve seat (6) is not inflated, the size of the sealing gap is set to 0.5 to 0.8 mm.

3. The pneumatic eccentric inflatable sealing ceramic butterfly valve according to claim 2, characterized in that: The butterfly valve body (1) and the butterfly valve end cover (7) are respectively provided with a valve body annular groove (11) and an end cover annular groove (71) adapted to the inflatable valve seat (6); the valve body annular groove (11) and the end cover annular groove (71) cooperate with each other to form a valve seat installation groove; the end cover annular groove (71) is also provided with an annular limiting groove (72) adapted to the inflatable valve seat (6); the inflatable valve seat (6) is fixedly connected to a side of the butterfly valve end cover (7) with an annular limiting strip (63) adapted to the annular limiting groove (72).

4. The pneumatic eccentric inflatable sealing ceramic butterfly valve according to claim 3, characterized in that: An inflatable connector (8) adapted to the inflatable valve seat (6) is inserted through one end of the butterfly valve end cap (7); the inflatable connector (8) is fixedly connected to the pneumatic head assembly (2) by providing an inflatable pipe (21); an inflatable through hole adapted to the inflatable connector (8) is provided on the inflatable valve seat (6); a connector hose (64) connected to the inflatable connector (8) is inserted through the inflatable through hole; the inflatable cavity (61) is communicated with the inflatable connector (8) through the connector hose (64); the pneumatic head assembly (2) is further provided with a filter pressure reducing valve (22) and a solenoid valve (23) adapted to the inflatable valve seat (6); the inflatable pipe (21) is connected to the filter pressure reducing valve (22) and the solenoid valve (23).

5. The pneumatic eccentric inflatable sealing ceramic butterfly valve according to claim 1, characterized in that: The butterfly valve body (1) is provided with an upper mounting groove (12) and a lower mounting groove (13) respectively adapted to the upper valve stem (4) and the lower valve stem (5); the upper valve stem (4) is connected to the pneumatic head assembly (2) via the upper mounting groove (12); a valve stem sealing ring (14) sleeved on the upper valve stem (4) is further provided in the upper mounting groove (12); a sealing ring groove (15) adapted to the valve stem sealing ring (14) is provided in the upper mounting groove (12).

6. The pneumatic eccentric inflatable sealing ceramic butterfly valve according to claim 1, characterized in that: The surfaces of the butterfly valve plate (3), the butterfly valve end cover (7) and the butterfly valve body (1) are all spray-coated with a nano-ceramic layer.

7. A pneumatic eccentric inflatable sealing ceramic butterfly valve according to any one of claims 1 to 6, characterized in that: A safety relief valve (9) adapted to the inflatable valve seat (6) is inserted through the other end of the butterfly valve end cover (7), and the pressure relief safety valve is connected to the inflatable cavity (61) in the inflatable valve seat (6).

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