Wafer type pneumatic butterfly valve

Abstract

The utility model relates to the field of butterfly valves, in particular to a double-clip type pneumatic butterfly valve which comprises a pneumatic butterfly valve body, a main body used for bearing a double-clip type pneumatic butterfly valve assembly, a valve rod and a butterfly plate arranged in the pneumatic butterfly valve body and used for opening and closing the butterfly plate, and the butterfly plate of the butterfly valve is fixedly installed outside the valve rod. The pneumatic butterfly valve is provided with the pneumatic butterfly valve body, the check valve core, the front filter element net, the torsion spring and the check core block, so that gas or fluid media are filtered by the front filter element net of the check valve core after passing through the space opened by the butterfly plate of the butterfly valve when passing through the pneumatic butterfly valve body, impurities contained in the media are reduced, and the gas or fluid media are filtered by the front filter element net of the check valve core when passing through the space opened by the butterfly plate of the butterfly valve. In this way, normal circulation of media can be guaranteed, normal use of the non-return capacity can also be guaranteed, the non-return core block can be pushed to be separated from the non-return valve element due to the pushing force of the media, at the moment, the extension of the torsion spring enables the non-return core block and the non-return valve element to be exposed out of a gap, and therefore the media can normally circulate.

Description

Technical Field

[0001] The utility model relates to the field of butterfly valves, and particularly relates to a wafer type pneumatic butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve or a butterfly shutter, is a simple-structured regulating valve. Its working principle is that a disc-shaped butterfly plate rotates around its own axis inside the valve body to achieve the purpose of opening and closing or regulating the flow rate of the medium. Butterfly valves are widely used and can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media. A wafer type pneumatic butterfly valve, also known as a clamped pneumatic butterfly valve or a clamped butterfly valve, is a valve designed according to the pneumatic operation principle. This valve mainly drives the rotation of the butterfly plate through a pneumatic actuator such as a piston type double-acting or single-acting pneumatic actuator to achieve the control of the fluid medium.

[0003] After retrieval, a wafer type pneumatic butterfly valve with the publication number of CN217898815U specifically discloses a wafer type pneumatic butterfly valve, including a pneumatic body, a valve body, and a mounting frame. A connecting block is installed at the bottom of the pneumatic body, a valve body is installed at the bottom end of the protection cylinder, a mounting frame is installed at the top of the pneumatic body, a connecting pipe is installed on the outer side of the valve body, a filter screen is installed inside the connecting pipe, a locking bolt is installed through the bottom of the connecting pipe, and a valve seat is installed at the bottom of the valve body. In the utility model, a driving gear is installed at the output end of the transmission rod. When a failure occurs in the pneumatic body, an operator manually rotates the rotating disc. The rotating disc drives the transmission rod to make the driving gear rotate and mesh with the driven gear. The valve stem drives the valve plate to rotate under the transmission action to realize the opening and closing of the butterfly valve, improving the safety during use. The sealing gasket ensures the sealing strength between the valve body and the valve plate when the valve stem rotates, enhancing the practical performance.

[0004] During the use of the existing wafer type pneumatic butterfly valve, since the application environment of the wafer type pneumatic butterfly valve is mostly fluids and gases, when it is necessary to ensure the one-way flow of the medium in some specific environments, if the wafer type pneumatic butterfly valve lacks a check valve core, it will not be able to prevent the reverse flow of the medium in the pipeline, which will cause the medium to flow back into the system when the valve is closed or a system failure occurs, damaging the equipment and even leading to safety accidents. Moreover, the wafer type pneumatic butterfly valve in the above comparative case also lacks the ability of check valve, which will significantly increase the risk of medium backflow, reduce the system stability, increase the maintenance cost, and affect the equipment performance in the long-term use.

[0005] Therefore, it is very necessary to invent a wafer type pneumatic butterfly valve to solve the above problems. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide a wafer - type pneumatic butterfly valve. By means of the pneumatic butterfly valve body, check valve core, pre - filter screen, torsion spring and check core block, the wafer - type pneumatic butterfly valve is enabled to have the function of check valve, avoiding the reverse flow of the medium. This helps to protect the equipment and pipelines in the system from the impact and damage of the reverse - flowing medium, extending their service life. Moreover, after the wafer - type pneumatic butterfly valve has the check valve function, it can significantly improve the safety of the system, reduce the accident risk caused by the reverse flow of the medium, and also reduce the difficulty and cost of maintenance work, so as to solve the problem that in the prior art, during the use of the wafer - type pneumatic butterfly valve, since the application environment of the wafer - type pneumatic butterfly valve is mostly fluid and gas, when it is necessary to ensure the one - way flow of the medium in some specific environments, if the wafer - type pneumatic butterfly valve lacks a check valve core, it will not be able to prevent the reverse flow of the medium in the pipeline. This will cause the medium to flow back into the system when the valve is closed or the system fails, damaging the equipment and even triggering safety accidents. And the wafer - type pneumatic butterfly valve in the above - mentioned comparative case also lacks the check valve function. In this way, long - term use will significantly increase the risk of medium reverse flow, reduce the system stability, increase the maintenance cost and affect the equipment performance.

[0007] To achieve the above - mentioned purpose, the present utility model provides the following technical solution: A wafer - type pneumatic butterfly valve, comprising a pneumatic butterfly valve body, which is the main body for carrying the wafer - type pneumatic butterfly valve assembly;

[0008] A valve stem, which is arranged inside the pneumatic butterfly valve body and is used to open and close the butterfly plate. A butterfly valve disc is fixedly installed outside the valve stem. Reinforcing grooves are formed inside the butterfly valve disc, and a disc sealing ring is arranged inside the reinforcing grooves. An outer - reinforced butterfly plate is fixedly installed outside the butterfly valve disc;

[0009] A check valve core, which is arranged inside the pneumatic butterfly valve body and is used to prevent the back - flow of the medium. A pre - filter screen is fixedly installed on one side of the check valve core, a torsion spring is arranged on the other side of the check valve core, a check core block is fixedly installed at one end of the torsion spring, and an upper butterfly valve seat is fixedly installed outside the pneumatic butterfly valve body.

[0010] Preferably, a wafer - type flange is fixedly installed outside the pneumatic butterfly valve body, and an embedded groove is formed inside the wafer - type flange.

[0011] Preferably, a wafer - type sealing ring is arranged inside the embedded groove, and fastening bolts penetrate through the outside of the wafer - type flange.

[0012] Preferably, the butterfly valve disc is movably connected to the pneumatic butterfly valve body, and the outer - reinforced butterfly plate is fixedly connected to the butterfly valve disc.

[0013] Preferably, the number of the torsion springs is set to be multiple, and the multiple torsion springs are distributed in a circular array on the check valve core.

[0014] Preferably, a fixing bolt penetrates through the top of the upper butterfly valve seat, and one end of the fixing bolt is movably connected to a pneumatic actuator.

[0015] In the above technical solution, the technical effects and advantages provided by the present utility model are as follows:

[0016] The present utility model is provided with a pneumatic butterfly valve body, a check valve core, a pre-filter screen, a torsion spring and a check valve core block. Whether it is a gas or a fluid medium, when passing through the pneumatic butterfly valve body, after passing through the space opened by the butterfly valve disc, it is first filtered by the pre-filter screen of the check valve core, reducing the impurities contained in the medium. This can not only ensure the normal flow of the medium, but also ensure the normal use of the check ability. Then, due to the driving force of the medium, the check valve core block will be pushed away from the check valve core. At this time, the extension of the torsion spring allows a gap to appear between the check valve core block and the check valve core, so that the medium can flow normally. On the contrary, if the medium flows back, the torsion spring will drive the check valve core block to expand and contract to block the check valve core, so that this wafer-type pneumatic butterfly valve has the check ability, avoiding the reverse flow of the medium. This helps to protect the equipment and pipelines in the system from the impact and damage of the reverse-flow medium, extending their service life. Moreover, after the wafer-type pneumatic butterfly valve has the check ability, it can significantly improve the safety of the system, reduce the accident risk caused by the reverse flow of the medium, and also reduce the difficulty and cost of maintenance work;

[0017] The present utility model is provided with wafer flanges, embedded grooves, wafer seals, fastening bolts, butterfly valve discs, strengthening grooves, disc seals and outer strengthened butterfly discs. When using this wafer-type pneumatic butterfly valve, the wafer flanges, as important components for connecting the wafer-type pneumatic butterfly valve and external pipelines, are provided with embedded grooves and wafer seals inside, which can significantly enhance the sealing effect between the wafer flanges, effectively preventing the medium from leaking from the flange connection and ensuring the sealing performance of the valve. At the same time, the internal butterfly valve disc is provided with strengthening grooves and disc seals, and outer strengthened butterfly discs are installed on both sides, which can significantly increase its structural strength, enabling it to withstand greater pressure and impact, ensuring the overall stability and reliability of the valve. The disc seal wrapped outside can further enhance the sealing effect between the disc and the valve seat. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 Structural schematic diagram of the wafer seal ring of the present utility model;

[0021] Figure 3 Structural schematic diagram of the butterfly plate seal ring of the present utility model;

[0022] Figure 4 Structural schematic diagram of the pre-filter screen of the present utility model;

[0023] Figure 5 Structural schematic diagram of the pneumatic actuator of the present utility model.

[0024] Explanation of reference numerals in the drawings:

[0025] 1. Pneumatic butterfly valve body; 2. Wafer flange; 3. Embedded groove; 4. Wafer seal ring; 5. Fastening bolt; 6. Valve stem; 7. Butterfly valve butterfly plate; 8. Reinforcing groove; 9. Butterfly plate seal ring; 10. Outer reinforced butterfly plate; 11. Check valve core; 12. Pre-filter screen; 13. Torsion spring; 14. Check valve core block; 15. Upper butterfly valve seat; 16. Fixed bolt; 17. Pneumatic actuator. Specific embodiments

[0026] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] The present utility model provides a wafer-type pneumatic butterfly valve as shown in Figures 1-5 , which includes a pneumatic butterfly valve body 1 for carrying the main body of the wafer-type pneumatic butterfly valve assembly;

[0028] A valve stem 6 is arranged inside the pneumatic butterfly valve body 1 for opening and closing the butterfly plate. A butterfly valve butterfly plate 7 is fixedly installed outside the valve stem 6. A reinforcing groove 8 is formed inside the butterfly valve butterfly plate 7. A butterfly plate seal ring 9 is arranged inside the reinforcing groove 8. An outer reinforced butterfly plate 10 is fixedly installed outside the butterfly valve butterfly plate 7;

[0029] A check valve core 11 is arranged inside the pneumatic butterfly valve body 1 for preventing the medium from flowing back. A pre-filter screen 12 is fixedly installed on one side of the check valve core 11. A torsion spring 13 is arranged on the other side of the check valve core 11. A check valve core block 14 is fixedly installed at one end of the torsion spring 13. An upper butterfly valve seat 15 is fixedly installed outside the pneumatic butterfly valve body 1. Due to the driving force of the medium, the check valve core block 14 will be pushed away from the check valve core 11. At this time, the extension of the torsion spring 13 allows a gap to appear between the check valve core block 14 and the check valve core 11, so that the medium can flow normally. On the contrary, if the medium flows back, the torsion spring 13 will drive the check valve core block 14 to expand and contract to block the check valve core 11, so that the wafer-type pneumatic butterfly valve has the ability to check the flow.

[0030] As shown in Figure 1 , Figure 2 and Figure 3 , a clamp flange 2 is fixedly installed on the outside of the pneumatic butterfly valve body 1. An embedded groove 3 is provided inside the clamp flange 2. As an important component for connecting the wafer-type pneumatic butterfly valve to the external pipeline, the embedded groove 3 and the clamp sealing ring 4 are provided inside the clamp flange 2, which can significantly enhance the sealing effect between the clamp flanges 2, effectively prevent the medium from leaking from the flange connection, and ensure the sealing performance of the valve. A clamp sealing ring 4 is provided inside the embedded groove 3. A fastening bolt 5 penetrates through the outside of the clamp flange 2. The structure of the clamp flange 2 is simple and easy to operate. In case of a malfunction, it is convenient for the maintenance personnel to replace it in time without delaying the normal use of the wafer-type pneumatic butterfly valve. The butterfly valve disc 7 is movably connected to the pneumatic butterfly valve body 1. The external reinforced butterfly valve disc 10 is fixedly connected to the butterfly valve disc 7. Reinforcing grooves 8 and butterfly valve disc sealing rings 9 are provided on the internal butterfly valve disc 7, and external reinforced butterfly valve discs 10 are installed on both sides. This can significantly increase its structural strength, enabling it to withstand greater pressure and impact, and ensuring the overall stability and reliability of the valve.

[0031] As shown in Figure 1 , Figure 4 and Figure 5 , the number of torsion springs 13 is set to be multiple. The multiple torsion springs 13 are arranged in a circular array on the check valve core 11. When the medium flows back, the torsion springs 13 will drive the check valve core block 14 to expand and contract to block the check valve core 11, enabling the wafer-type pneumatic butterfly valve to have the function of check valve and preventing the medium from flowing back. A fixing bolt 16 penetrates through the top of the upper butterfly valve seat 15. One end of the fixing bolt 16 is movably connected to a pneumatic actuator 17. The pneumatic actuator 17 drives the valve stem 6 to rotate, thereby closing the butterfly valve disc 7 to the pneumatic butterfly valve body 1 and completing the closing operation of the wafer-type pneumatic butterfly valve.

[0032] Working principle of this utility model: First, at one end of the pipeline where the wafer-type pneumatic butterfly valve needs to be installed, the wafer-type pneumatic butterfly valve is docked and installed with the external pipeline through the wafer flange 2 and the fastening bolts 5. Then, the wafer flange 2 is provided with an embedded groove 3 and a wafer seal ring 4 inside, which can significantly enhance the sealing effect between the wafer flanges 2, effectively prevent the medium from leaking from the flange connection, and ensure the sealing performance of the valve. Then, after the installation is completed, the wafer-type pneumatic butterfly valve can be used normally. Connect the external power supply and turn on the switch of the pneumatic actuator 17 to make the pneumatic actuator 17 drive the valve stem 6 to rotate, so that the butterfly valve disc 7 rotates to open the pneumatic butterfly valve body 1. At this time, whether it is a gas or a fluid medium, it can pass through the space opened by the butterfly valve disc 7. Subsequently, the medium continues to flow forward and is filtered by the pre-filter screen 12 of the check valve core 11, reducing the impurities contained in the medium. This can not only ensure the normal flow of the medium but also ensure the normal use of the check function. Then, due to the driving force of the medium, the check valve core block 14 is pushed away from the check valve core 11. At this time, the extension of the torsion spring 13 allows a gap to appear between the check valve core block 14 and the check valve core 11, enabling the medium to flow normally. Then, if the medium flows back, the torsion spring 13 will drive the check valve core block 14 to expand and contract to block the check valve core 11, giving this wafer-type pneumatic butterfly valve the ability to check and preventing the medium from flowing back. This helps protect the equipment and pipelines in the system from the impact and damage of the reverse-flow medium and extends their service life. At the same time, when the wafer-type pneumatic butterfly valve is closed, the internal butterfly valve disc 7 is also provided with a reinforcing groove 8 and a disc seal ring 9, and external reinforcing butterfly plates 10 are installed on both sides, which can significantly increase its structural strength, enabling it to withstand greater pressure and impact, ensuring the overall stability and reliability of the valve. The externally wrapped disc seal ring 9 can further enhance the sealing effect between the disc and the valve seat. Finally, after completing all the installation and use work of the wafer-type pneumatic butterfly valve according to the above operations, turn off the switch of the pneumatic actuator 17. If it is not used for a long time, cut off the external power supply. Just like this, the use process of the wafer-type pneumatic butterfly valve is completed.

[0033] Only some exemplary embodiments of the present utility model have been described by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present utility model, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A wafer type pneumatic butterfly valve, characterized in that: including a pneumatic butterfly valve body (1) for carrying the main body of the wafer-type pneumatic butterfly valve assembly; a valve stem (6) arranged inside the pneumatic butterfly valve body (1) for opening and closing the butterfly plate, and a butterfly valve disc (7) is fixedly installed outside the valve stem (6). A reinforcing groove (8) is opened inside the butterfly valve disc (7), and a disc sealing ring (9) is arranged inside the reinforcing groove (8). An outer reinforcing butterfly plate (10) is fixedly installed outside the butterfly valve disc (7); a check valve core (11) arranged inside the pneumatic butterfly valve body (1) for preventing the medium from flowing back. A pre-filter screen (12) is fixedly installed on one side of the check valve core (11), a torsion spring (13) is arranged on the other side of the check valve core (11), and a check valve core block (14) is fixedly installed at one end of the torsion spring (13). An upper butterfly valve seat (15) is fixedly installed outside the pneumatic butterfly valve body (1); 2. The wafer type pneumatic butterfly valve according to claim 1, characterized in that: a wafer flange (2) is fixedly installed outside the pneumatic butterfly valve body (1), and an embedded groove (3) is opened inside the wafer flange (2); 3. The wafer-type pneumatic butterfly valve according to claim 2, characterized in that: a wafer sealing ring (4) is arranged inside the embedded groove (3), and a fastening bolt (5) penetrates through the outside of the wafer flange (2); 4. The wafer type pneumatic butterfly valve according to claim 1, characterized in that: the butterfly valve disc (7) is movably connected to the pneumatic butterfly valve body (1), and the outer reinforcing butterfly plate (10) is fixedly connected to the butterfly valve disc (7); 5. The wafer type pneumatic butterfly valve according to claim 1, characterized in that: the number of the torsion springs (13) is set to be multiple, and the multiple torsion springs (13) are distributed in a circular array on the check valve core (11); 6. The wafer type pneumatic butterfly valve according to claim 1, characterized in that: a fixing bolt (16) penetrates through the top of the upper butterfly valve seat (15), and one end of the fixing bolt (16) is movably connected to a pneumatic actuator (17).

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