A high-life diaphragm valve used in the pharmaceutical field

Abstract

The present invention relates to a high-life diaphragm valve used in the pharmaceutical field, comprising a valve body, a valve bottom, a valve tube, a blocking plate, and a diaphragm. The diaphragm is provided with a matching plate located above the blocking plate on the side facing the valve bottom, and the diaphragm is integrally connected with an inner diaphragm on the side facing away from the valve bottom. The inner diaphragm and the diaphragm are provided with the same pin, and the pin is located inside the inner diaphragm and the diaphragm. Two pin blocks are integrally connected on both sides of the pin. The diaphragm is provided with a valve core, and the bottom of the valve core is provided with a pin hole that fits the end surface of the pin and the pin block. The valve core can be clamped with the pin, and a transverse groove that penetrates the valve core transversely is provided above the valve core, and a valve stem is clamped above the valve core, and the valve stem and the valve core are penetrated by the same latch pin. The present invention has the advantage of being easy to disassemble.

Description

Technical Field

[0001] The invention relates to the technical field of diaphragm valves, and in particular to a long-life diaphragm valve used in the pharmaceutical field. Background Art

[0002] The structure of the diaphragm valve is very different from that of general valves. It is a new type of valve and a special form of cut-off valve. Its opening and closing parts are a diaphragm made of soft material, which separates the inner cavity of the valve body from the inner cavity of the valve cover and the driving components. It is now widely used in various fields, especially in the pharmaceutical field.

[0003] In the pharmaceutical field, the diaphragm in the diaphragm valve is often exposed to high temperature conditions. This is because the valve needs to be sterilized at high temperature before use, so it is very easy to deform at high temperature. The position of the diaphragm needs to be adjusted to avoid high temperature deformation. The present invention uses an embedded method for the diaphragm to avoid deformation, and currently the diaphragm and the valve core are basically threaded, which makes installation very inconvenient. Since the diaphragm is made of soft material, after the threaded connection is used, the movement of the valve stem and the valve core is likely to cause damage to the diaphragm. It is now changed to a pin hook connection to ensure uniform installation height and improve installation efficiency. Summary of the invention

[0004] In view of the shortcomings of the prior art, an object of the present invention is to provide a long-life diaphragm valve for use in the pharmaceutical field, which has the advantage of being easy to disassemble.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a high-life diaphragm valve used in the pharmaceutical field, comprising a valve body, the valve body comprising a valve bottom, two valve tubes connected on both sides of the valve bottom, an inwardly concave blocking plate is arranged in the middle of the valve bottom, a hemispherical diaphragm is threadedly connected above the valve bottom, a matching plate located above the blocking plate is arranged on the side of the diaphragm facing the valve bottom, an inner diaphragm is integrally connected on the side of the diaphragm away from the valve bottom, the inner diaphragm and the diaphragm are jointly provided with the same pin, part of the pin is located inside the inner diaphragm and the diaphragm, two pin blocks are integrally connected on both sides of the pin, a valve core is arranged on the diaphragm, a pin hole matching the end faces of the pin and the pin block is arranged at the bottom of the valve core, the valve core is clamped with the pin, a transverse groove that transversely penetrates the valve core is arranged above the valve core, a valve stem is clamped above the valve core, and the valve stem and the valve core are penetrated by the same pin.

[0006] By adopting the above technical solution, the diaphragm is set as a hemispherical protrusion, the diaphragm is fitted together with the blocking plate, and then the screws are tightened, which is very convenient, and a part of the pin is inside the diaphragm to avoid high-temperature deformation or leakage caused by uneven tightness of the screws. The setting of the pin allows the valve stem to squeeze the diaphragm in a surface extrusion, which can extend the service life of the diaphragm. The diaphragm and the valve core are connected by a hook-type pin, which can ensure the uniformity of the installation height and improve the installation efficiency. Align the pin of the valve core with the pin and the pin block, and then rotate 90 degrees to achieve the clamping connection between the valve core and the diaphragm, and then fix the valve core with the valve stem. The up and down movement of the valve stem can drive the up and down movement of the diaphragm. Since the diaphragm is made of flexible material, the valve stem can drive the middle part of the diaphragm to move and deform, and then the two sides of the valve pipe will be connected to each other. When disassembly is required, pull out the pin, separate the valve core from the valve stem, and then rotate the valve core to separate the valve core pin. The inner diaphragm is on one side of the diaphragm and is also made of soft material to avoid high-temperature deformation.

[0007] The present invention is further configured as follows: a valve cover is connected to the top of the valve body, three first limit plates are integrally connected to the side of the valve cover, the first limit plates are located at the center of the valve cover and are equidistantly distributed in the circumference of the valve cover, a driving cylinder is arranged above the valve cover, the driving cylinder includes a cylinder cover clamped with the valve cover, an extension plate is integrally connected to the side of the cylinder cover facing the valve cover, the extension plate is integrally connected with three second limit plates equidistantly distributed about the center of the cylinder cover, a fixing device is arranged at the bottom of the cylinder cover, when the cylinder cover is above the valve cover, the upper end of the valve cover is inside the extension plate, rotating the cylinder cover can make the second limit plate below the first limit plate, the fixing device can limit the rotation of the cylinder cover, at this time the cylinder cover and the valve cover are clamped.

[0008] By adopting the above technical scheme, the current cylinder head and valve cover are both connected by thread or bolt. The threaded connection easily causes the two to be stuck and difficult to separate. The bolt connection occupies a large space area and has many external protrusions, and there are many dead angles and many disadvantages. Therefore, the present invention adopts a snap-on form to avoid the above two problems, and cooperates with the fixing device to realize a flexible connection between the cylinder head and the valve cover, thereby achieving the advantages of convenient and fast disassembly and assembly and low cost.

[0009] The present invention is further configured as follows: the fixing device includes a fixing plate fixedly connected to the extension plate and arranged perpendicularly to the extension plate, one end of the fixing plate is provided with a fixing pin penetrating the fixing plate, the valve cover is provided with a fixing groove for the fixing pin to be inserted into, and when the fixing pin is in the fixing groove, the groove wall of the fixing groove squeezes the fixing pin.

[0010] By adopting the above technical solution, when there is no need for the cylinder head and the valve cover to rotate relative to each other, the fixing pin can be inserted into the fixing groove. At this time, the fixing pin will produce an extrusion and fixing effect with the groove wall of the fixing groove, so that the fixing plate and the valve cover cannot rotate relative to each other, thereby fixing the cylinder head and the valve cover in a fixed connection.

[0011] The present invention is further configured such that an O-ring is sleeved on the side surface of the valve cover.

[0012] By adopting the above technical solution, the provision of the O-ring makes the connection between the valve cover and the cylinder head tighter.

[0013] The present invention is further configured as follows: the upper end of the valve stem is connected to the piston rod of the driving cylinder, two half-ring blocks are sleeved at the connection between the piston rod and the valve stem, a fixing rod is arranged between the two half-ring blocks, and the fixing rod is squeezed and fixed to the two half-ring blocks.

[0014] By adopting the above technical solution, after the upper end of the valve stem abuts against the piston rod, the two half-ring blocks are squeezed against the piston rod and the valve stem at the same time, and then the two half-ring blocks are fixedly connected by a fixing rod. Since the valve stem and the piston rod are previously connected by threads, the nut may loosen during operation and affect the concentricity. Therefore, two detachable half-ring blocks are used, and the connection is more stable. In addition, the use of an integrated valve stem can avoid air leakage.

[0015] The present invention is further configured as follows: a stabilizing plate is sleeved on the side of the portion of the valve stem located at the cylinder head, and an O-ring is sleeved on the side of the stabilizing plate.

[0016] By adopting the above technical solution, the setting of the stabilizing plate can prevent the valve stem from deflecting during operation, and the setting of the O-ring allows the stabilizing plate to move along the height of the cylinder head.

[0017] The present invention is further configured as follows: a spring is arranged inside the cylinder head, one end of the spring is connected to the top of the valve cover, and the other end of the spring is connected to the stabilizing plate.

[0018] By adopting the above technical solution, the setting of the spring can enhance the resetting ability of the piston rod.

[0019] The present invention is further configured as follows: a driving motor is arranged at the bottom of the valve bottom, the output shaft of the driving motor is threadedly connected with an output rod, the output rod is arranged in a rectangular shape, a square groove for accommodating the output rod is arranged inside the valve body, and one end of the output rod is connected to an output plate.

[0020] By adopting the above technical solution, when the driving cylinder temporarily fails, or when only a small amount of liquid needs to flow between the two valve tubes, the driving motor can be started to drive the output rod to move along its own length direction. The movement of the output rod can drive the movement of the output plate and then squeeze the diaphragm above the output plate to form a channel for liquid circulation, thereby connecting the two valve tubes. In this process, the square groove limits the rotation of the output rod.

[0021] The present invention is further configured as follows: a detection slot is provided on one side of the output plate, a detector is provided inside the detection slot, a closing piece is provided on the output plate at the opening of the detection slot, the closing piece includes a closing plate at the opening of the detection slot, a side of the closing plate facing away from the detector is provided as an inclined surface, and a micro cylinder connected to the closing plate is provided on the valve bottom.

[0022] By adopting the above technical solution, when it is necessary to detect the parameters of the liquid in the valve tube, after the output plate moves to the outside of the valve bottom, the micro cylinder can be started to drive the closing plate to move. When the closing plate moves, the opening of the detection groove will be partially exposed. At this time, part of the liquid in the valve tube will flow into the detection groove. The detector can perform relevant numerical parameter detection on the liquid flowing into the detection groove. The detected parameters can be pH value, oxygen content and some other conventional tests.

[0023] In summary, the present invention has the following beneficial effects:

[0024] The diaphragm is set as a hemispherical protrusion. The diaphragm is fitted with the blocking plate and then the screws are tightened. It is very convenient, and part of the pin is inside the diaphragm to avoid deformation due to high temperature or leakage caused by uneven tightness of the screws. The diaphragm and the valve core are connected by a hook-type pin, which can ensure the uniformity of the installation height and improve the installation efficiency. Align the pin of the valve core with the pin and the pin block, and then rotate 90 degrees to achieve the clamping connection between the valve core and the diaphragm. Then, the valve core is fixedly connected to the valve stem. The up and down movement of the valve stem can drive the up and down movement of the diaphragm. Since the diaphragm is made of flexible material, the valve stem can drive the middle part of the diaphragm to move and deform, and then the two sides of the valve pipe will be connected to each other. When disassembly is required, pull out the pin, then separate the valve core from the valve stem, and then rotate the valve core to separate the valve core pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an embodiment;

[0026] Figure 2 for Figure 1 Schematic diagram of the structure without the cylinder head;

[0027] Figure 3 is a structural schematic diagram of the connection relationship between the valve tube and the blocking plate in the embodiment;

[0028] Figure 4 A structural schematic diagram of the connection relationship between the diaphragm sheet and the matching plate in the embodiment;

[0029] Figure 5 It is a structural schematic diagram of the connection relationship between the diaphragm, the inner diaphragm, the pin and the pin block in the embodiment;

[0030] Figure 6 It is a structural schematic diagram of the connection relationship between the valve core and the pin hole in the embodiment;

[0031] Figure 7 is a cross-sectional view of an embodiment;

[0032] Figure 8 is a cross-sectional view of a valve body in an embodiment;

[0033] Fig. 9 is a cross-sectional view of an embodiment;

[0034] Fig.10 The cylinder head, the second limiting plate, the fixing plate and the fixing pin in the embodiment;

[0035] Fig.11 It is a structural schematic diagram of the connection relationship between the valve core, the pin hole and the transverse groove in the embodiment;

[0036] Fig.12 for Figure 8 Schematic diagram of the structure after adding the drive motor, output rod, square slot and output plate;

[0037] Fig.13 It is a structural schematic diagram of the connection relationship between the two half-ring blocks and the fixing rod in the embodiment;

[0038] Fig.14 for Fig.12 A partial enlarged view of area A.

[0039] 1. Valve body; 2. Valve bottom; 3. Valve tube; 4. Blocking plate; 5. Diaphragm; 6. Matching plate; 7. Inner diaphragm; 8. Pin; 9. Pin block; 10. Valve core; 11. Pin hole; 12. Horizontal groove; 13. Valve stem; 14. Latch pin; 15. Valve cover; 16. Micro cylinder; 17. Driving cylinder; 18. Cylinder cover; 19. Extension plate; 20. First limit plate; 21. Second limit plate; 22. Fixed plate; 23. Fixed pin; 24. Fixed groove; 25. O-ring; 26. Piston rod; 27. Half ring block; 28. Fixed rod; 29. ​​Stabilizing plate; 30. Spring; 31. Driving motor; 32. Output rod; 33. Square groove; 34. Output plate; 35. Detection groove; 36. Detector; 37. Closing plate. DETAILED DESCRIPTION

[0040] The present invention will be further described with reference to the accompanying drawings.

[0041] A high-life diaphragm valve used in the pharmaceutical field, such as Figure 1-Figure 14 As shown, it includes a valve body 1, the valve body 1 includes a valve bottom 2, two valve tubes 3 are connected to the two sides of the valve bottom 2, an inner concave blocking plate 4 is arranged in the middle of the valve bottom 2, a hemispherical diaphragm 5 is threadedly connected to the top of the valve bottom 2, a matching plate 6 located above the blocking plate 4 is arranged on the side of the diaphragm 5 facing the valve bottom 2, an inner diaphragm 7 is integrally connected to the side of the diaphragm 5 facing away from the valve bottom 2, and the inner diaphragm 7 and the diaphragm 5 are jointly provided with a same pin 8, and the pin 8 The part is located inside the inner diaphragm 7 and the diaphragm 5, two pin blocks 9 are integrally connected to the two sides of the pin 8, a valve core 10 is provided on the diaphragm 5, a pin hole 11 is provided at the bottom of the valve core 10 to fit the end faces of the pin 8 and the pin block 9, the valve core 10 is clamped with the pin 8, a transverse groove 12 is provided above the valve core 10 to penetrate the valve core 10 transversely, a valve stem 13 is clamped above the valve core 10, and the valve stem 13 and the valve core 10 are penetrated by the same pin 14. The inner diaphragm 7 can be made of EPDM, and the diaphragm 5 can be made of PTFE.

[0042] A valve cover 15 is connected to the top of the valve body 1, and three first limit plates 20 are integrally connected to the side of the valve cover 15, the first limit plates 20 are located at the center of the valve cover 15 and are equidistantly distributed in the circumference of the valve cover 15, a driving cylinder 17 is arranged above the valve cover 15, the driving cylinder 17 includes a cylinder cover 18 engaged with the valve cover 15, an extension plate 19 is integrally connected to the side of the cylinder cover 18 facing the valve cover 15, the extension plate 19 is integrally connected with three second limit plates 21 distributed equidistantly about the center of the cylinder cover 18, a fixing device is arranged at the bottom of the cylinder cover 18, when the cylinder cover 18 is above the valve cover 15, the upper end of the valve cover 15 is inside the extension plate 19, rotating the cylinder cover 18 can make the second limit plate 21 below the first limit plate 20, and the fixing device can be used to limit the rotation of the cylinder cover 18, at this time, the cylinder cover 18 and the valve cover 15 are engaged.

[0043] The fixing device includes a fixing plate 22 fixedly connected to the extension plate 19 and arranged perpendicularly to the extension plate 19, one end of the fixing plate 22 is provided with a fixing pin 23 penetrating the fixing plate 22, and the valve cover 15 is provided with a fixing groove 24 for the fixing pin 23 to be inserted into. When the fixing pin 23 is in the fixing groove 24, the groove wall of the fixing groove 24 squeezes the fixing pin 23.

[0044] An O-ring 25 is sleeved on the side surface of the valve cover 15 .

[0045] The upper end of the valve stem 13 is connected to the piston rod 26 of the driving cylinder 17. Two half-ring blocks 27 are sleeved at the connection between the piston rod 26 and the valve stem 13. A fixing rod 28 is arranged between the two half-ring blocks 27. The fixing rod 28 is squeezed and fixed to the two half-ring blocks 27.

[0046] A stabilizing plate 29 is sleeved on the side of the valve stem 13 located at the cylinder cover 18 , and an O-ring 25 is sleeved on the side of the stabilizing plate 29 .

[0047] A spring 30 is disposed inside the cylinder head 18 , one end of the spring 30 is connected to the top of the valve cover 15 , and the other end of the spring 30 is connected to the stabilizing plate 29 .

[0048] A driving motor 31 is provided at the bottom of the valve bottom 2, and an output shaft of the driving motor 31 is threadedly connected with an output rod 32, and the output rod 32 is set in a rectangular shape. A square groove 33 for accommodating the output rod 32 is provided inside the valve body 1, and one end of the output rod 32 is connected to an output plate 34.

[0049] A detection slot 35 is provided on one side of the output plate 34, a detector 36 is provided inside the detection slot 35, a sealing member is provided on the output plate 34 at the opening of the detection slot 35, the sealing member includes a sealing plate 37 at the opening of the detection slot 35, a side of the sealing plate 37 facing away from the detector 36 is provided as an inclined surface, and a micro cylinder 16 connected to the sealing plate 37 is provided on the valve bottom 2. The detector 36 can be used to detect pH value, dissolved oxygen or other commonly used parameters.

[0050] The valve stem 13 can be driven by a cylinder 17 or manually.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present invention should be included in the protection scope of the present invention.

Claims

1. A long-life diaphragm valve used in the pharmaceutical field, comprising a valve body (1), wherein the valve body (1) comprises a valve bottom (2), Features: Two valve tubes (3) are connected to the two sides of the valve bottom (2); a concave blocking plate (4) is provided in the middle of the valve bottom (2); a hemispherical diaphragm (5) is threadedly connected to the top of the valve bottom (2); a matching plate (6) located above the blocking plate (4) is provided on the side of the diaphragm (5) facing the valve bottom (2); an inner diaphragm (7) is integrally connected to the side of the diaphragm (5) facing away from the valve bottom (2); the inner diaphragm (7) and the diaphragm (5) are jointly provided with a same pin (8); part of the pin (8) is located inside the inner diaphragm (7) and the diaphragm (5); two pin blocks (9) are integrally connected to the two sides of the pin (8); a valve core (10) is provided on the diaphragm (5); The bottom of the valve core (10) is provided with a pin hole (11) which fits with the end faces of the pin (8) and the pin block (9), the valve core (10) is clamped with the pin (8), the top of the valve core (10) is provided with a transverse groove (12) which transversely penetrates the valve core (10), the top of the valve core (10) is clamped with a valve stem (13), the valve stem (13) and the valve core (10) are penetrated by the same latch pin (14), the top of the valve body (1) is connected with a valve cover (15), the side of the valve cover (15) is integrally connected with three first limit plates (20), the first limit plates (20) are located at the center of the valve cover (15) and are equidistantly distributed around the valve cover (15), and the top of the valve cover (15) is provided with a driving cylinder ( 17), the driving cylinder (17) comprises a cylinder cover (18) clamped with the valve cover (15), the cylinder cover (18) is integrally connected with an extension plate (19) on one side facing the valve cover (15), the extension plate (19) is integrally connected with three second limit plates (21) distributed equidistantly about the center of the cylinder cover (18), a fixing device is provided at the bottom of the cylinder cover (18), when the cylinder cover (18) is located above the valve cover (15), the upper end of the valve cover (15) is located inside the extension plate (19), the cylinder cover (18) can be rotated to allow the second limit plate (21) to be located below the first limit plate (20), the fixing device can be used to limit the rotation of the cylinder cover (18), at this time the cylinder cover (18) and the valve cover (15) is clamped, the upper end of the valve stem (13) is connected to the piston rod (26) of the driving cylinder (17), two half-ring blocks (27) are sleeved at the connection between the piston rod (26) and the valve stem (13), a fixing rod (28) is arranged between the two half-ring blocks (27), the fixing rod (28) is squeezed and fixed with the two half-ring blocks (27), a driving motor (31) is arranged at the bottom of the valve bottom (2), the output shaft of the driving motor (31) is threadedly connected to the output rod (32), the output rod (32) is arranged in a rectangular parallelepiped shape, a square groove (33) for accommodating the output rod (32) is arranged inside the valve body (1), and one end of the output rod (32) is connected to the output plate (34).

2. A long-life diaphragm valve used in the pharmaceutical field according to claim 1, Features: The fixing device comprises a fixing plate (22) fixedly connected to the extension plate (19) and arranged perpendicularly to the extension plate (19); one end of the fixing plate (22) is provided with a fixing pin (23) penetrating the fixing plate (22); the valve cover (15) is provided with a fixing groove (24) for the fixing pin (23) to be inserted into; when the fixing pin (23) is in the fixing groove (24), the groove wall of the fixing groove (24) squeezes the fixing pin (23).

3. A long-life diaphragm valve used in the pharmaceutical field according to claim 1, Features: An O-ring (25) is sleeved on the side surface of the valve cover (15).

4. A long-life diaphragm valve used in the pharmaceutical field according to claim 1, Features: A stabilizing plate (29) is sleeved on the side of the valve stem (13) located on the cylinder cover (18), and an O-ring (25) is sleeved on the side of the stabilizing plate (29).

5. The long-life diaphragm valve used in the pharmaceutical field according to claim 1, Features: A spring (30) is arranged inside the cylinder head (18), one end of the spring (30) is connected to the top of the valve cover (15), and the other end of the spring (30) is connected to the stabilizing plate (29).

6. The long-life diaphragm valve used in the pharmaceutical field according to claim 1, Features: A detection groove (35) is arranged on one side of the output plate (34), a detector (36) is arranged inside the detection groove (35), the output plate (34) is provided with a closing piece located at the opening of the detection groove (35), the closing piece comprises a closing plate (37) located at the opening of the detection groove (35), a side of the closing plate (37) facing away from the detector (36) is arranged as an inclined surface, and the valve bottom (2) is provided with a micro cylinder (16) connected to the closing plate (37).

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