Detachable diaphragm valve

Abstract

The utility model discloses a detachable diaphragm valve, which belongs to the technical field of diaphragm valves and comprises a valve body through pipe, the top of the valve body through pipe is fixedly connected with an external thread cylinder, and an internal thread sleeve is mounted on the outer side of the external thread cylinder in a threaded manner. According to the utility model, the valve body through pipe and the diaphragm valve body can be ensured to be disassembled and assembled through the thread fit of the external thread cylinder and the internal thread sleeve, so that the replacement of the diaphragm plate can be realized; a sealing insertion ring and a rubber sealing gasket on the inner side of the internal thread sleeve are inserted into a sealing groove in the top face of the external thread barrel, meanwhile, the bottom face of a connecting ring is attached to the top face of the external thread barrel, the connection sealing performance between the external thread barrel and the internal thread sleeve is guaranteed, and then the risk of air leakage of the lower portion of the inner cavity of the diaphragm valve body is avoided. The stability of the diaphragm valve during operation is guaranteed, and the practicability of the detachable diaphragm valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm valves, and more specifically to a detachable diaphragm valve. Background Art

[0002] The diaphragm valve is a stop valve that uses a diaphragm as an opening and closing part to close the flow channel, cut off the fluid, and separate the inner cavity of the valve body from the inner cavity of the valve cover. The diaphragm is usually made of elastic, corrosion-resistant, and non-permeable materials such as rubber and plastic, and the valve body is mostly made of plastic, fiberglass, ceramic or metal-lined rubber materials. During the use of the diaphragm valve, the contact between the fluid and the diaphragm will cause wear of the diaphragm, so the diaphragm needs to be replaced regularly.

[0003] After searching, the utility model patent with announcement number CN221054356U discloses a detachable diaphragm valve, including a through-body tube, a flow limiting plate is arranged inside the through-body tube, the upper surface of the through-body tube is fixedly connected with a fixed cylinder, the outer surface of the fixed cylinder is threadedly connected with a fixed sleeve, the upper surface of the fixed sleeve is fixedly connected with a diaphragm valve body, a movable rod is arranged inside the diaphragm valve body, and the top end of the movable rod is fixedly connected with the limit plate. The device can make the movable rod in the diaphragm valve body drive the diaphragm plate to move up and down through the cooperation of the first air inlet and the second air inlet, so as to limit the flow of the fluid in the through-body tube, and the diaphragm valve body can be removed by twisting the diaphragm valve body with the cooperation of the fixed sleeve and the fixed cylinder, so as to replace the diaphragm plate in the diaphragm valve body, making the disassembly of the diaphragm valve more convenient, and effectively solving the problem that the existing diaphragm valve device is more troublesome to disassemble the diaphragm. However, the above patent still has the following shortcomings: the diaphragm valve body is installed on the through-body tube through the threaded cooperation of the fixing cylinder and the fixing sleeve, but the threaded cooperation of the fixing cylinder and the fixing sleeve is not convenient for ensuring the gas sealing effect of the lower part of the diaphragm valve body, and the gas is easy to overflow from the thread groove, affecting the control effect of the diaphragm plate. In addition, it is not convenient to ensure the installation stability of the fixing cylinder and the fixing sleeve after the threaded installation, and the threaded fixing cylinder and the fixing sleeve are prone to looseness. For this reason, we propose a detachable diaphragm valve. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a detachable diaphragm valve.

[0005] In order to solve the above problems, the utility model adopts the following technical solutions:

[0006] A detachable diaphragm valve comprises a valve body through pipe, the top of the valve body through pipe is fixedly connected with an external threaded barrel, the outer side of the external threaded barrel is threadedly installed with an internal threaded sleeve, the top of the internal threaded sleeve is fixedly connected with a diaphragm valve body, the inner cavity of the valve body through pipe is provided with a lining plate, the lining plate is provided with a valve hole, the outer side of the internal threaded sleeve is provided with a plurality of jacks, the top of the valve body through pipe is provided with two fixing mechanisms, the side portion of the top end of the diaphragm valve body is provided with a first air inlet, the side portion of the bottom end of the diaphragm valve body is provided with a second air inlet, the top surface of the external threaded barrel is provided with a sealing groove, the upper part of the inner cavity of the internal threaded sleeve is provided with a connecting ring, the bottom surface of the connecting ring is provided with a sealing insert ring, the bottom end of the sealing insert ring is movably sleeved to the inner cavity of the sealing groove and fixedly connected with a rubber sealing pad, the inner cavity of the diaphragm valve body is movably sleeved with a piston plate, the bottom surface of the piston plate is fixedly connected with a movable rod, the bottom end of the movable rod extends to the inner cavity of the internal threaded sleeve and is fixedly connected with the diaphragm plate.

[0007] As a preferred solution of the utility model, the fixing mechanism includes a fixing box fixedly connected to the top surface of the valve body through pipe, the inner wall of the fixing box is fixedly connected with a spring, the end of the spring is fixedly connected with a push block, one end of the push block is fixedly connected with a latch, the end of the latch is movably sleeved into the inner cavity of the socket, the other end of the push block is fixedly connected with a pull rod, one end of the pull rod is movably sleeved to the outside of the fixing box and fixedly connected with a pull plate.

[0008] As a preferred solution of the utility model, a sealing ring is fixedly connected to the side of the piston plate, the side of the sealing ring fits the inner wall of the diaphragm valve body, the top surface of the piston plate is fixedly connected to a limiting rod, the top end of the limiting rod is movably sleeved to the top of the diaphragm valve body and fixedly connected to the limiting disk.

[0009] As a preferred solution of the utility model, the inner diameter of the connecting ring is equal to the inner diameter of the external threaded barrel, and the outer diameter of the diaphragm plate is respectively equal to the inner diameters of the connecting ring and the external threaded barrel.

[0010] As a preferred solution of the utility model, the side surface of the sealing insert ring is in contact with the inner wall of the sealing groove, and the bottom surface of the rubber sealing pad is in contact with the bottom surface of the inner cavity of the sealing groove.

[0011] As a preferred solution of the utility model, the outer diameter of the plug is equal to the inner diameter of the plug hole.

[0012] As a preferred solution of the utility model, flanges are fixedly connected to the outer sides of both ends of the valve body through pipe respectively.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] (1) In the utility model, the threaded fit of the external threaded barrel and the internal threaded sleeve can ensure that the valve body through pipe and the diaphragm valve body can be disassembled and assembled, so that the diaphragm plate can be replaced. In addition, after the external threaded barrel and the internal threaded sleeve are installed, the sealing insert ring and the rubber sealing gasket on the inner side of the internal threaded sleeve are inserted into the sealing groove on the top surface of the external threaded barrel, and at the same time, the bottom surface of the connecting ring and the top surface of the external threaded barrel are fitted together to ensure the sealing of the connection between the external threaded barrel and the internal threaded sleeve, thereby avoiding the risk of air leakage in the lower part of the inner cavity of the diaphragm valve body, ensuring the stability of the diaphragm valve during operation, and improving the practicality of the detachable diaphragm valve.

[0015] (2) In the utility model, after the external threaded barrel and the internal threaded sleeve are threadedly installed, the elastic force of the spring is used to push the push block to move, and the push block is used to drive the pin to be inserted into the insertion hole on the side of the internal threaded sleeve. The internal threaded sleeve is fixed by the cooperation between the pin and the insertion hole, so as to prevent the internal threaded sleeve from loosening on the external threaded barrel, ensure the stability and firmness of the threaded connection between the external threaded barrel and the internal threaded sleeve, and improve the working quality of the detachable diaphragm valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0018] Figure 3 It is a cross-sectional exploded view of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the external threaded barrel of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the internal thread sleeve of the utility model;

[0021] Figure 6 It is a cross-sectional schematic diagram of the fixing mechanism of the utility model;

[0022] Figure 7 For this utility model Figure 2 A is an enlarged schematic diagram.

[0023] Description of the numbers in the figure:

[0024] 1. Valve body through pipe; 2. Externally threaded barrel; 3. Internally threaded sleeve; 4. Diaphragm valve body; 5. First air inlet; 6. Second air inlet; 7. Plug hole; 8. Fixing mechanism; 9. Lining plate; 10. Valve hole; 11. Connecting ring; 12. Sealing plug ring; 13. Rubber sealing pad; 14. Sealing groove; 15. Piston plate; 16. Movable rod; 17. Diaphragm plate; 18. Fixing box; 19. Spring; 20. Push block; 21. Latch; 22. Pull rod; 23. Pull plate; 24. Limit rod; 25. Limit plate; 26. Flange; 27. Sealing ring. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] Example:

[0029] See also Figure 1-7A detachable diaphragm valve comprises a valve body through pipe 1, the top of the valve body through pipe 1 is fixedly connected with an external threaded barrel 2, the outer side of the external threaded barrel 2 is threadedly installed with an internal threaded sleeve 3, the top of the internal threaded sleeve 3 is fixedly connected with a diaphragm valve body 4, the inner cavity of the valve body through pipe 1 is provided with a lining plate 9, the lining plate 9 is provided with a valve hole 10, the outer side of the internal threaded sleeve 3 is provided with a plurality of plug holes 7, the top of the valve body through pipe 1 is provided with two fixing mechanisms 8, the side of the top of the diaphragm valve body 4 is provided with a first air inlet 5, and the bottom of the diaphragm valve body 4 is provided with a first air inlet 5. A second air inlet 6 is provided on the side, a sealing groove 14 is provided on the top surface of the external threaded tube 2, a connecting ring 11 is provided on the upper part of the inner cavity of the internal threaded sleeve 3, a sealing insert ring 12 is provided on the bottom surface of the connecting ring 11, the bottom end of the sealing insert ring 12 is movably sleeved to the inner cavity of the sealing groove 14 and is fixedly connected to a rubber sealing pad 13, a piston plate 15 is movably sleeved to the inner cavity of the diaphragm valve body 4, a movable rod 16 is fixedly connected to the bottom surface of the piston plate 15, and the bottom end of the movable rod 16 extends to the inner cavity of the internal threaded sleeve 3 and is fixedly connected to a diaphragm plate 17.

[0030] For details, please refer to Figure 1 and Figure 6 The fixing mechanism 8 includes a fixing box 18 fixedly connected to the top surface of the valve body through pipe 1, a spring 19 fixedly connected to the inner wall of the fixing box 18, a push block 20 fixedly connected to the end of the spring 19, one end of the push block 20 fixedly connected to a latch 21, the end of the latch 21 movably sleeved into the inner cavity of the socket 7, the other end of the push block 20 fixedly connected to a pull rod 22, one end of the pull rod 22 movably sleeved to the outside of the fixing box 18 and fixedly connected to a pull plate 23.

[0031] In this embodiment, the elastic force of the spring 19 is used to drive the push block 20 and the latch pin 21 to move, so that the end of the latch pin 21 is inserted into the insertion hole 7 on the side of the internal threaded sleeve 3 to fix the internal threaded sleeve 3.

[0032] For details, please refer to Figure 2 A sealing ring 27 is fixedly connected to the side of the piston plate 15, and the side of the sealing ring 27 fits the inner wall of the diaphragm valve body 4. The top surface of the piston plate 15 is fixedly connected to the limiting rod 24, and the top end of the limiting rod 24 is movably connected to the top of the diaphragm valve body 4 and fixedly connected to the limiting disk 25.

[0033] In this embodiment, a sealing ring 27 is used to ensure the sealing between the upper and lower parts of the inner cavity of the diaphragm valve body 4. In addition, a sealing ring can be set at the sliding position between the limit rod 24 and the diaphragm valve body 4 to ensure the sealing between the limit rod 24 and the diaphragm valve body 4 and avoid air leakage in the upper part of the inner cavity of the diaphragm valve body 4.

[0034] For details, please refer to Figure 7 The inner diameter of the connecting ring 11 is equal to the inner diameter of the external threaded barrel 2, and the outer diameter of the diaphragm plate 17 is equal to the inner diameters of the connecting ring 11 and the external threaded barrel 2 respectively.

[0035] In this embodiment, the diaphragm plate 17 is ensured to move smoothly in the inner cavities of the connecting ring 11 and the externally threaded barrel 2 . In addition, the diaphragm plate 17 is located directly above the valve hole 10 so that the valve hole 10 can be blocked by the diaphragm plate 17 .

[0036] For details, please refer to Figure 7 The side surface of the sealing insert ring 12 is in contact with the inner wall of the sealing groove 14 , and the bottom surface of the rubber sealing pad 13 is in contact with the bottom surface of the inner cavity of the sealing groove 14 .

[0037] In this embodiment, the sealing insert ring 12 is inserted into the inner cavity of the sealing groove 14 to ensure the sealing performance, thereby ensuring the sealing performance of the connection between the internal thread sleeve 3 and the diaphragm valve body 4.

[0038] For details, please refer to Figure 1 and Figure 6 , the outer diameter of the latch pin 21 is equal to the inner diameter of the insertion hole 7.

[0039] In this embodiment, the stability of the end of the plug pin 21 inserted into the inner cavity of the insertion hole 7 is ensured, thereby ensuring the stability of the plug pin 21 fixing the internal threaded sleeve 3.

[0040] For details, please refer to Figure 1 The outer sides of both ends of the valve body through pipe 1 are respectively fixedly connected with flanges 26.

[0041] In this embodiment, the valve is installed via a flange 26 .

[0042] Working principle: When in use, connect the first air inlet 5 and the second air inlet 6 to the air pump, inflate the upper part of the inner cavity of the diaphragm valve body 4 through the air pump, and use the gas in the upper part of the inner cavity of the diaphragm valve body 4 to push the piston plate 15, the movable rod 16 and the diaphragm plate 17 downward, so that the diaphragm plate 17 moves down to the inner cavity of the valve body through pipe 1 to block the valve hole 10, thereby closing the diaphragm valve, and vice versa to open the isolation valve. When the diaphragm plate 17 is worn and needs to be replaced, the air pump and the first air inlet 5 and the second air inlet 6 are separated respectively, and the pull plate 23 is pulled to move the pull rod 22, the push block 20 and the latch 21, so that the end of the latch 21 is separated from the inner cavity of the socket 7 to release the fixation of the internal threaded sleeve 3. At this time, the diaphragm valve body 4 is rotated to drive the internal threaded sleeve 3 to rotate, so that the internal threaded sleeve 3 is rotated off the external threaded barrel 2, thereby replacing the diaphragm plate 17. After the diaphragm plate 17 is replaced, the diaphragm valve body 4 is installed on the valve body through-tube 1 again through the threaded cooperation between the internal threaded sleeve 3 and the external threaded barrel 2. At the same time, the sealing insert ring 12 and the rubber sealing gasket 13 on the inner side of the internal threaded sleeve 3 are inserted into the sealing groove 14 on the top surface of the external threaded barrel 2. The sealing insert ring 12, the rubber sealing gasket 13 and the sealing groove 14 are used to ensure the connection sealing between the internal threaded sleeve 3 and the external threaded barrel 2, thereby ensuring the connection sealing between the valve body through-tube 1 and the diaphragm valve body 4. In addition, at this time, the elastic force of the spring 19 is used to drive the pin 21 to be inserted into the insertion hole 7 on the side of the internal threaded sleeve 3, thereby fixing the threaded connection between the internal threaded sleeve 3 and the external threaded barrel 2. At the same time, the threads on the inner side of the internal threaded sleeve 3 and the threads on the outer side of the external threaded barrel 2 are fixed when they are opened, which can ensure that the positions of the insertion hole 7 and the pin 21 are adapted to each other after the external threaded barrel 2 and the internal threaded sleeve 3 are threadedly installed.

[0043] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the utility model according to the technical solution and improved ideas of the utility model, which should be included in the protection scope of the utility model.

Claims

1. A detachable diaphragm valve, comprising a valve body through pipe (1), characterized in that: The top of the valve body through pipe (1) is fixedly connected to an external threaded barrel (2), the outer side of the external threaded barrel (2) is threadedly mounted with an internal threaded sleeve (3), the top of the internal threaded sleeve (3) is fixedly connected to a diaphragm valve body (4), the inner cavity of the valve body through pipe (1) is provided with a lining plate (9), the lining plate (9) is provided with a valve hole (10), the outer side of the internal threaded sleeve (3) is provided with a plurality of insertion holes (7), the top of the valve body through pipe (1) is provided with two fixing mechanisms (8), the side of the top end of the diaphragm valve body (4) is provided with a first air inlet (5), and the side of the bottom end of the diaphragm valve body (4) is provided with a second air inlet (6). The air port (6) is provided with a sealing groove (14) on the top surface of the externally threaded barrel (2), a connecting ring (11) is provided on the upper part of the inner cavity of the internally threaded sleeve (3), a sealing insert ring (12) is provided on the bottom surface of the connecting ring (11), the bottom end of the sealing insert ring (12) is movably sleeved into the inner cavity of the sealing groove (14) and is fixedly connected to a rubber sealing pad (13), the inner cavity of the diaphragm valve body (4) is movably sleeved with a piston plate (15), the bottom surface of the piston plate (15) is fixedly connected to a movable rod (16), the bottom end of the movable rod (16) extends to the inner cavity of the internally threaded sleeve (3) and is fixedly connected to a diaphragm plate (17).

2. A detachable diaphragm valve according to claim 1, characterized in that: The fixing mechanism (8) comprises a fixing box (18) fixedly connected to the top surface of the valve body through pipe (1), the inner wall of the fixing box (18) is fixedly connected to a spring (19), the end of the spring (19) is fixedly connected to a push block (20), one end of the push block (20) is fixedly connected to a latch (21), the end of the latch (21) is movably sleeved into the inner cavity of the socket (7), the other end of the push block (20) is fixedly connected to a pull rod (22), one end of the pull rod (22) is movably sleeved to the outside of the fixing box (18) and is fixedly connected to a pull plate (23).

3. A detachable diaphragm valve according to claim 1, characterized in that: A sealing ring (27) is fixedly connected to the side surface of the piston plate (15), and the side surface of the sealing ring (27) is in contact with the inner wall of the diaphragm valve body (4). The top surface of the piston plate (15) is fixedly connected to a limiting rod (24), and the top end of the limiting rod (24) is movably sleeved to the top of the diaphragm valve body (4) and fixedly connected to the limiting disk (25).

4. The detachable diaphragm valve according to claim 1, characterized in that: The inner diameter of the connecting ring (11) is equal to the inner diameter of the externally threaded barrel (2), and the outer diameter of the diaphragm plate (17) is respectively equal to the inner diameters of the connecting ring (11) and the externally threaded barrel (2).

5. The detachable diaphragm valve according to claim 1, characterized in that: The side surface of the sealing insert ring (12) is in contact with the inner wall of the sealing groove (14), and the bottom surface of the rubber sealing pad (13) is in contact with the bottom surface of the inner cavity of the sealing groove (14).

6. A detachable diaphragm valve according to claim 2, characterized in that: The outer diameter of the latch pin (21) is equal to the inner diameter of the insertion hole (7).

7. The detachable diaphragm valve according to claim 1, characterized in that: Flange plates (26) are fixedly connected to the outer sides of both ends of the valve body through pipe (1).

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