Long-life clean diaphragm valve

Abstract

The utility model discloses a long -life clean diaphragm valve, including valve seat, the valve bottom of being located valve seat bottom, the valve pipe of being located valve bottom both sides, the diaphragm piece of being connected in valve bottom top, the valve core of being located in the inside of valve seat and being connected with diaphragm piece, the valve rod of being connected with valve core, the piston of being located on valve rod, the cylinder body of being located in valve seat top and being connected with valve rod and the cylinder cover being connected with valve seat, diaphragm piece includes the diaphragm piece body of setting close to valve bottom and the diaphragm gasket of setting away from valve bottom, the inside of diaphragm piece body is provided with the connecting piece of being connected with diaphragm gasket, and connecting piece is connected with valve core, and the middle part of valve bottom is provided with recessed baffle, and the sealing rib that cooperates with recessed baffle is provided on diaphragm piece body, and the inside of valve core is provided with mounting space, and is provided with fastener in mounting space. The utility model makes diaphragm piece not easy to damage, and diaphragm piece body and diaphragm gasket not easy to separate, deformation, so can better guarantee the sealing effect and service life of diaphragm valve.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to a long-life clean diaphragm valve. Background Technology

[0002] Diaphragm valves differ significantly in structure from ordinary valves. They are a new type of valve, a special type of shut-off valve. Their opening and closing element is a diaphragm made of a soft material, separating the valve seat cavity from the valve cover cavity and the drive components. They are now widely used in various fields, especially in the pharmaceutical industry. Commonly used diaphragm valves include rubber-lined diaphragm valves, fluoropolymer-lined diaphragm valves, unlined diaphragm valves, and plastic diaphragm valves.

[0003] When diaphragm valves are used, they undergo high-temperature sterilization. However, the diaphragm is prone to deformation under high temperatures, which can cause the double-layer diaphragm to separate. Therefore, improving the structure of the diaphragm and / or the connection structure between the diaphragm and the valve core to prevent damage or separation of the diaphragm, thereby giving the diaphragm valve higher sealing performance and a longer service life, has become a problem that we need to solve. Utility Model Content

[0004] This invention overcomes the shortcomings of the prior art and provides a high-life-cycle clean diaphragm valve. Its reasonable structural design makes the diaphragm less prone to damage, and the diaphragm body and diaphragm gasket are less likely to separate or deform, thus better ensuring the sealing function and service life of the diaphragm valve.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-life clean diaphragm valve includes a valve seat, a valve bottom located at the bottom of the valve seat, valve tubes located on both sides of the valve bottom, a diaphragm plate connected above the valve bottom, a valve core located inside the valve seat and connected to the diaphragm plate, a valve stem connected to the valve core, a piston located on the valve stem, a cylinder body located at the top of the valve seat and connected to the valve stem, and a cylinder head connected to the valve seat. The diaphragm plate includes a diaphragm plate body located near the valve bottom and a diaphragm gasket located away from the valve bottom. A connector is provided inside the diaphragm plate body and connected to the diaphragm gasket. The connector is connected to the valve core. A recessed baffle is provided in the middle of the valve bottom. A sealing rib is provided on the diaphragm plate body and cooperates with the recessed baffle. An installation space is provided inside the valve core. A fastener is provided in the installation space and is restricted from circumferential rotation within the installation space. A limit stop is provided at the bottom of the valve core in the installation space to restrict the downward movement of the fastener. The connector is fixedly connected to the fastener.

[0007] By adopting the above technical solution, the connector and fastener are fixedly connected, and the fastener is placed on the limiting block. This avoids damage to the diaphragm caused by direct threaded connection between the valve core and the diaphragm, thus ensuring the sealing performance and service life of the diaphragm. Specifically, the fastener can be an external hexagonal nut, and the inner wall of the valve core in the installation space is set with a regular hexagonal shape corresponding to the external hexagonal nut. This effectively prevents circumferential rotation of the fastener. The end of the connector can be provided with external threads, and the connector and fastener are threadedly connected. This threaded connection is only one specific implementation method to ensure the fixation of the connector and fastener. In reality, the connector and valve core are still connected by the fastener placed on the limiting block. When the valve stem moves the valve core up and down, it will not damage the diaphragm.

[0008] Preferably, the sealing rib protrudes from the diaphragm sheet and forms a groove on the side of the diaphragm sheet near the diaphragm gasket. The diaphragm gasket is provided with a matching rib at the position corresponding to the groove. The matching rib is located in the groove and seals with the groove. The diaphragm gasket is provided with a support rib corresponding to the matching rib on the side away from the diaphragm sheet.

[0009] By adopting the above technical solution, and by setting sealing ribs and grooves on the diaphragm sheet, and setting matching ribs and support ribs on the diaphragm gasket, the mechanical strength of the diaphragm sheet can be improved, and tearing and deformation can be prevented. This allows the diaphragm sheet to be better sealed and fitted to the valve seat. In particular, the matching ribs and grooves enable the diaphragm sheet and the diaphragm gasket to fit better, preventing delamination, and providing support force to the sealing ribs on the diaphragm sheet. This avoids the sealing ribs from being squeezed and deformed due to the uneven thickness of the diaphragm sheet, thus ensuring better sealing performance.

[0010] Preferably, the diaphragm gasket has an exhaust hole on at least one side of the support rib.

[0011] By adopting the above technical solution, the vent hole can be used to discharge gas between the diaphragm sheet and the diaphragm gasket, increase the fit between the two, further prevent separation, and enable timely detection and repair / replacement when the diaphragm sheet is ruptured.

[0012] Preferably, the diaphragm sheet is disposed coveringly on the diaphragm gasket, with the edge of the diaphragm sheet extending out of the diaphragm gasket, and the valve seat covers and presses the diaphragm gasket tightly against the diaphragm gasket.

[0013] By adopting the above technical solution, when the valve seat is connected to the valve bottom by screw threads, the screw will pass through the diaphragm gasket and the diaphragm body. Since the valve seat covers the diaphragm gasket, the edge end of the diaphragm gasket can be pressed, so that the diaphragm gasket can better fit the diaphragm body and prevent the diaphragm from deforming at high temperature.

[0014] Preferably, a guide bar is provided on the inner wall of the valve seat in the vertical direction, and a guide groove is provided on the valve core to cooperate with the guide bar.

[0015] By adopting the above technical solution, this setting, compared with the existing setting of guide grooves on the valve seat, can effectively reduce the amount of medium remaining in the guide groove when it flows through, thus greatly reducing the contamination inside the valve seat and improving the cleanliness of the valve seat. In addition, the combination of guide strip and guide groove can also be used to guide the valve core well and restrict the circumferential rotation of the valve core.

[0016] Preferably, the cylinder head is mounted on the valve seat and threadedly connected to the valve seat. An air source connector is connected to the valve seat, which is used to limit the rotation of the cylinder head relative to the valve seat.

[0017] By adopting the above technical solution, the air source connector is set at the connection end between the cylinder cover and the valve seat. After the cylinder cover and the valve seat are threaded together, the air source connector is then threaded onto the valve seat. The cylinder cover is provided with an arc-shaped clearance groove at the position corresponding to the air source connector. In this way, the air source connector can limit the rotation of the cylinder cover and prevent the cylinder cover from rotating and detaching from the valve seat after use.

[0018] The beneficial effects of this utility model are:

[0019] This utility model has a reasonable structural design and uses connectors and fasteners for fixed connection, so that the diaphragm is placed on the valve core. This avoids the damage to the diaphragm caused by the direct threaded connection between the valve core and the diaphragm when the valve stem moves the valve core, thereby improving the sealing performance and service life of the diaphragm. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model;

[0021] Figure 2 This is a cross-sectional view of a specific embodiment of the present utility model;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a schematic diagram illustrating the structure of the valve bottom in a specific embodiment of this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the diaphragm sheet in a specific embodiment of the present invention. Figure 1 ;

[0025] Figure 6 This is a schematic diagram of the structure of the diaphragm sheet in a specific embodiment of the present invention. Figure 2 ;

[0026] Figure 7 This is a schematic diagram of the explosion structure of the diaphragm sheet in a specific embodiment of the present invention. Figure 1 ;

[0027] Figure 8 This is a schematic diagram of the explosion structure of the diaphragm sheet in a specific embodiment of the present invention. Figure 2 ;

[0028] Figure 9 This is a schematic diagram of the connection structure between the connecting member and the valve core in a specific embodiment of this utility model. Figure 1 ;

[0029] Figure 10 This is a schematic diagram of the connection structure between the connecting member and the valve core in a specific embodiment of this utility model. Figure 2 ;

[0030] Figure 11 This is a schematic diagram of the cooperative structure of the guide strip and the guide groove in a specific embodiment of this utility model.

[0031] In the diagram: 1. Valve seat; 11. Valve bottom; 111. Recessed baffle; 12. Valve pipe; 13. Valve stem; 14. Piston; 15. Cylinder body; 16. Cylinder head; 17. Air source connector; 18. Guide strip; 3. Diaphragm; 31. Diaphragm body; 32. Diaphragm gasket; 33. Connector; 34. Sealing rib; 35. Groove; 36. Matching rib; 37. Support rib; 38. Exhaust port; 4. Valve core; 41. Installation space; 42. Fastener; 43. Limiting block; 44. Guide groove. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] like Figure 1-11As shown, a high-lifespan clean diaphragm valve includes a valve seat 1, a valve bottom 11 located at the bottom of the valve seat 1, valve tubes 12 located on both sides of the valve bottom 11, a diaphragm 3 connected above the valve bottom 11, a valve core 4 located inside the valve seat 1 and connected to the diaphragm 3, a valve stem 13 connected to the valve core 4, a piston 14 located on the valve stem 13, a cylinder body 15 located at the top of the valve seat 1 and connected to the valve stem 13, and a cylinder head 16 connected to the valve seat 1. The diaphragm 3 includes a diaphragm body 31 located near the valve bottom 11 and a diaphragm gasket 32 ​​located away from the valve bottom 11. The valve body 31 has a connector 33 inside that connects to the diaphragm gasket 32. The connector 33 is connected to the valve core 4. A recessed baffle 111 is provided in the middle of the valve bottom 11. A sealing rib 34 that cooperates with the recessed baffle 111 is provided on the diaphragm body 31. An installation space 41 is provided inside the valve core 4. A fastener 42 is provided in the installation space 41. The fastener 42 is restricted from circumferential rotation in the installation space 41. A limit stop 43 is provided at the bottom of the installation space 41 to restrict the downward movement of the fastener 42. The connector 33 is fixedly connected to the fastener 42.

[0034] This configuration securely connects the connector 33 to the fastener 42, with the fastener 42 resting on the limiting block 43. This avoids damage to the diaphragm 3 caused by a direct threaded connection between the valve core 4 and the diaphragm 3, ensuring the sealing performance and service life of the diaphragm 3. Specifically, the fastener 42 can be an external hexagonal nut, and the valve core 4 has a corresponding hexagonal shape on the inner wall of the installation space 41. This effectively prevents circumferential rotation of the fastener 42. The connector 33 can also have external threads at its end, connecting it to the fastener 42. This threaded connection is merely a specific implementation method to ensure the fixation of the connector 33 and the fastener 42. The actual connection between the connector 33 and the valve core 4 is still via the fastener 42 resting on the limiting block 43. This prevents damage to the diaphragm 3 when the valve stem 13 moves the valve core 4 up and down.

[0035] Preferably, the sealing rib 34 protrudes from the diaphragm sheet 31 and forms a groove 35 on the side of the diaphragm sheet 31 near the diaphragm gasket 32. The diaphragm gasket 32 ​​is provided with a mating rib 36 at the position corresponding to the groove 35. The mating rib 36 is located in the groove 35 and seals with the groove 35. The diaphragm gasket 32 ​​is provided with a support rib 37 corresponding to the mating rib 36 on the side away from the diaphragm sheet 31. This configuration, with sealing ribs 34 and grooves 35 on the diaphragm sheet 31, and mating ribs 36 and supporting ribs 37 on the diaphragm gasket 32, specifically with the sealing ribs 34 being arc-shaped, improves the mechanical strength of the diaphragm sheet 3, preventing tearing and deformation. This allows the diaphragm sheet 3 to better seal and fit against the valve seat 1. The mating of the ribs 36 and grooves 35 ensures better fit between the diaphragm sheet 31 and the diaphragm gasket 32, preventing delamination. It also provides support for the sealing ribs 34 to the diaphragm sheet 31, preventing the sealing ribs 34 from being squeezed and deformed due to uneven thickness of the diaphragm sheet 31, thus ensuring better sealing performance.

[0036] Furthermore, the diaphragm gasket 32 ​​is provided with an exhaust hole 38 on at least one side of the support rib 37. This arrangement allows for the discharge of gas between the diaphragm body 31 and the diaphragm gasket 32, increasing their fit and further preventing separation. In addition, when the diaphragm body 31 is ruptured, it can be detected and repaired or replaced in a timely manner.

[0037] The diaphragm sheet 31 is disposed over the diaphragm gasket 32, with the edge of the diaphragm sheet 31 extending out of the diaphragm gasket 32. The valve seat 1 covers and presses the diaphragm gasket 32 ​​tightly against it. With this arrangement, when the valve seat 1 is connected to the valve bottom 11 by screw threads, the screw will pass through the diaphragm gasket 32 ​​and the diaphragm sheet 31. Since the valve seat 1 covers the diaphragm gasket 32, the edge of the diaphragm gasket 32 ​​can be pressed tightly, so that the diaphragm gasket 32 ​​can better fit the diaphragm sheet 31 and prevent the diaphragm sheet 3 from deforming at high temperatures.

[0038] In this design, a guide strip 18 protrudes vertically from the inner wall of the valve seat 1, and a guide groove 44 that mates with the guide strip 18 is provided on the valve core 4. Compared to the existing design of a guide groove on the valve seat 1, this design effectively reduces the amount of medium residue remaining in the guide groove during medium flow, significantly reducing contamination inside the valve seat 1 and improving its cleanliness. Furthermore, the coordinated arrangement of the guide strip 18 and the guide groove 44 also serves to guide the valve core 4 effectively and restrict its circumferential rotation.

[0039] The cylinder head 16 is mounted on the valve seat 1 and threadedly connected to the valve seat 1. An air source connector 17 is connected to the valve seat 1, which restricts the rotation of the cylinder head 16 relative to the valve seat 1. This configuration places the air source connector 17 at the connection end between the cylinder head 16 and the valve seat 1. After threading the cylinder head 16 to the valve seat 1, the air source connector 17 is then threaded onto the valve seat 1. An arc-shaped clearance groove is provided on the cylinder head 16 corresponding to the position of the air source connector 17. This allows the air source connector 17 to limit the rotation of the cylinder head 16, preventing it from rotating away from the valve seat 1 after prolonged use.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-life clean diaphragm valve, comprising a valve seat (1), a valve bottom (11) disposed at the bottom of the valve seat (1), valve tubes (12) disposed on both sides of the valve bottom (11), a diaphragm plate (3) connected above the valve bottom (11), a valve core (4) disposed inside the valve seat (1) and connected to the diaphragm plate (3), a valve stem (13) connected to the valve core (4), a piston (14) disposed on the valve stem (13), a cylinder body (15) disposed at the top of the valve seat (1) and connected to the valve stem (13), and a valve tube (15) connected to the valve seat (1). The cylinder head (16) is connected to the diaphragm plate (3), which includes a diaphragm plate body (31) disposed near the valve bottom (11) and a diaphragm gasket (32) disposed away from the valve bottom (11). A connector (33) is disposed inside the diaphragm plate body (31) and connects to the diaphragm gasket (32). The connector (33) is connected to the valve core (4). A recessed baffle (111) is disposed in the middle of the valve bottom (11). A sealing rib (34) that cooperates with the recessed baffle (111) is disposed on the diaphragm plate body (31). The diaphragm plate is characterized by... The valve core (4) has an installation space (41) inside, and a fastener (42) is provided in the installation space (41). The fastener (42) is restricted to rotate circumferentially in the installation space (41). The valve core (4) is located at the bottom of the installation space (41) and a limiting block (43) is provided to restrict the fastener (42) from moving downward. The connector (33) is fixedly connected to the fastener (42).

2. The high-lifespan cleanroom diaphragm valve according to claim 1, characterized in that, A sealing rib (34) protrudes from the diaphragm sheet (31) and forms a groove (35) on the side of the diaphragm sheet (31) near the diaphragm gasket (32). A matching rib (36) is provided on the diaphragm gasket (32) at the position corresponding to the groove (35). The matching rib (36) is located in the groove (35) and seals with the groove (35). A support rib (37) corresponding to the matching rib (36) is provided on the side of the diaphragm gasket (32) away from the diaphragm sheet (31).

3. The high-lifespan cleanroom diaphragm valve according to claim 2, characterized in that, The diaphragm gasket (32) has an exhaust hole (38) on at least one side of the support rib (37).

4. A high-lifespan cleanroom diaphragm valve according to claim 3, characterized in that, A diaphragm sheet (31) is disposed on a diaphragm gasket (32), with the edge of the diaphragm sheet (31) extending out of the diaphragm gasket (32). The valve seat (1) covers and presses the diaphragm gasket (32) against the diaphragm gasket (32).

5. A high-lifespan cleanroom diaphragm valve according to claim 1, 2, 3, or 4, characterized in that, A guide bar (18) is provided on the inner wall of the valve seat (1) in the vertical direction, and a guide groove (44) is provided on the valve core (4) to cooperate with the guide bar (18).

6. A high-lifespan cleanroom diaphragm valve according to claim 5, characterized in that, The cylinder head (16) is mounted on the valve seat (1) and threadedly connected to the valve seat (1). An air source connector (17) is connected to the valve seat (1). The air source connector (17) is used to limit the rotation of the cylinder head (16) relative to the valve seat (1).

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