CN217056429U - Sealing diaphragm for pneumatic diaphragm valve and pneumatic diaphragm valve - Google Patents
Sealing diaphragm for pneumatic diaphragm valve and pneumatic diaphragm valve Download PDFInfo
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- CN217056429U CN217056429U CN202220068233.5U CN202220068233U CN217056429U CN 217056429 U CN217056429 U CN 217056429U CN 202220068233 U CN202220068233 U CN 202220068233U CN 217056429 U CN217056429 U CN 217056429U
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Abstract
The utility model discloses a sealed diaphragm and pneumatic diaphragm valve for pneumatic diaphragm valve, a sealed diaphragm for pneumatic diaphragm valve, a seal, a direction unit, a locking unit, a pressure-bearing unit, seal top fixedly connected with the locking unit, seal outer wall fixed mounting has the pressure-bearing unit, the pressure-bearing unit outside is provided with the direction unit, the locking unit passes through the restriction of slot key cooperation the direction of motion of seal, the pressure-bearing unit slows down the liquid stream through the curved surface structure and strikes, the direction unit is fixed through the tolerance cooperation the seal.
Description
Technical Field
The utility model relates to a machine part field, in particular to a sealed diaphragm and pneumatic diaphragm valve for pneumatic diaphragm valve.
Background
Pneumatic diaphragm valves are a special form of shut-off valves that have been around in the 20 th century in the 20's. The opening and closing part is a diaphragm made of soft material, and separates the inner cavity of valve body from the inner cavity of valve cover and driving component, so that it is called pneumatic diaphragm valve. The pneumatic diaphragm valve has the outstanding characteristics that the diaphragm separates the inner cavity of the lower valve body from the inner cavity of the upper valve cover, so that parts such as a valve rod, a valve clack and the like positioned above the diaphragm are not corroded by media, a packing sealing structure is omitted, and the media cannot leak.
Pneumatic diaphragm valves have two main advantages: one is that this valve does not need solitary valve rod packing structure, and the diaphragm has played the sealed effect of valve rod when cutting off the medium, and its second is that the very strong diaphragm of pliability closes reliably, can both accomplish good cutting off even to the foul solution. The actuating element is therefore completely separated from the medium channel, so that the pneumatic diaphragm valve can be used not only in the food and medical industry but also in difficult-to-transport and more dangerous media.
The diaphragm made of soft seal such as rubber or plastic in the prior art has better sealing performance, but is not durable enough, has shorter service life and higher cost because of being a vulnerable part.
Disclosure of Invention
The invention aims to provide a sealing diaphragm for a pneumatic diaphragm valve and the pneumatic diaphragm valve so as to solve the technical problems.
In order to achieve the purpose, the invention provides the following technical scheme:
the sealing diaphragm is used for a pneumatic diaphragm valve, and comprises a sealing body, a guide unit, a locking unit and a pressure-bearing unit, wherein the top of the sealing body is fixedly connected with the locking unit, the pressure-bearing unit is fixedly installed on the outer wall of the sealing body, the guide unit is arranged on the outer side of the pressure-bearing unit, the locking unit limits the motion direction of the sealing body through the cooperation of groove keys, the pressure-bearing unit slows down liquid flow impact through a curved surface structure, and the guide unit is fixed through tolerance cooperation with the sealing body.
Further, the seal is round table-shaped, the radius of the bottom of the seal is larger than that of the top of the seal, and a chamfer is arranged between the bottom surface of the seal and the side surface of the seal.
Further, the locking unit includes: the sealing structure comprises a fixing seat, a limiting groove, a locking groove and an inserting groove, wherein the fixing seat is fixedly installed at the top of the sealing body, the inserting groove is formed in the top of the fixing seat, the locking groove is formed in the bottom wall of the inserting groove in a communicated mode, the limiting groove is formed in the bottom wall of the locking groove in a communicated mode, the radius of the limiting groove is larger than that of the locking groove, and the radius of the locking groove is smaller than that of the inserting groove.
Furthermore, chamfers are respectively arranged between the top and the bottom of the inserting groove and the top of the fixed seat and the top of the locking groove.
Further, the pressure bearing unit includes: the combined annular plate, the pressure-bearing is protruding to set up to the ring form, the bellied inner wall of pressure-bearing through integrated into one piece connect in the diapire of the outer wall of fixing base, the bellied outer wall of pressure-bearing with combined annular plate fixed connection, middle part between the bellied inner wall of pressure-bearing and the outer wall is to keeping away from seal one side is protruding, just the bellied inner wall bottom of pressure-bearing the lateral wall top of seal with middle part between the bellied inner wall of pressure-bearing and the outer wall becomes a smooth curved surface.
Further, the guide unit includes: the base plate, the tolerance groove, base plate bottom fixedly connected with the combination crown plate, the base plate sets up to the ring form, just the lateral wall of base plate has seted up the tolerance groove.
Furthermore, a chamfer is arranged between the outer wall of the fixing seat and the top wall of the pressure-bearing bulge, a chamfer is arranged between the inner wall of the substrate and the top wall of the pressure-bearing bulge, and a chamfer is arranged between the combined ring and the outer wall of the pressure-bearing bulge.
The utility model provides a pneumatic diaphragm valve, includes valve body, valve rod and valve gap, still includes a sealed diaphragm for pneumatic diaphragm valve, the valve body top be provided with the adaptation the sealing member of seal bottom, the valve rod slides the adaptation the closure unit, the valve rod passes through the closure unit drives the seal slides, the adaptation has been seted up to the valve gap inner wall the tolerance muscle in tolerance groove, the valve gap passes through the tolerance groove with the base plate is fixed mutually.
The whole integrated into one piece mode production of diaphragm through the seal that the slope set up for when the seal pushes down gradually with the laminating of sealing member, when reaching sealed effect, reduce the friction between sealing member and the seal, sealed effectual, the seal that the slope and the level and smooth setting of curved surface simultaneously make the liquid stream great when passing through, the liquid stream is less to the impact force of seal, and seal wearing and tearing are little, long service life.
Drawings
Fig. 1 is a schematic structural diagram of a sealing diaphragm for a pneumatic diaphragm valve according to the present invention;
fig. 2 is a top view of a sealing diaphragm for a pneumatic diaphragm valve according to the present invention;
fig. 3 is a cross-sectional view of a sealing diaphragm for a pneumatic diaphragm valve in accordance with the present invention;
fig. 4 is a schematic structural diagram of a pneumatic diaphragm valve according to the present invention;
fig. 5 is a schematic view of the structure a in fig. 3 according to the present invention.
In the figure: 11. a seal body; 21. a fixed seat; 22. a limiting groove; 23. a locking groove; 24. inserting grooves; 31. a combined ring plate; 32. a pressure bearing bulge; 41. a substrate; 42. a tolerance groove; 51. a valve body; 52. a valve stem; 53. and a valve cover.
Detailed Description
A sealing diaphragm for a pneumatic diaphragm valve, characterized by: the sealing structure comprises a sealing body 11, a guide unit, a locking unit and a pressure-bearing unit, wherein the top of the sealing body 11 is fixedly connected with the locking unit, the pressure-bearing unit is fixedly installed on the outer wall of the sealing body 11, the outer side of the pressure-bearing unit is provided with the guide unit, the locking unit is limited by the cooperation of groove keys in the motion direction of the sealing body 11, the pressure-bearing unit slows down the liquid flow impact through a curved surface structure, and the guide unit is fixed by the cooperation of tolerance in the sealing body 11.
The sealing body 11, the guiding unit, the locking unit and the pressure-bearing unit can be produced in an integrated forming mode, and soft materials with certain elasticity, such as rubber, are selected.
As a further aspect of the present invention, the seal 11 is set to be circular truncated cone-shaped, and the radius of the bottom of the seal 11 is greater than the radius of the top of the seal, just the bottom surface of the seal 11 with a chamfer is provided between the sides of the seal 11.
Through the seal 11 that the slope set up for when seal 11 pushes down gradually with the laminating of sealing member, when reaching sealed effect, reduce the friction between sealing member and the seal 11, sealed effectual, the seal 11 of slope and the smooth setting of curved surface simultaneously makes the liquid stream great when passing through, and the liquid stream is less to the impact force of seal 11, and seal 11 wearing and tearing are little, long service life.
As a further aspect of the present invention, the locking unit includes: the sealing structure comprises a fixing seat 21, a limiting groove 22, a locking groove 23 and an inserting groove 24, wherein the fixing seat 21 is fixedly mounted at the top of the sealing body 11, the inserting groove 24 is formed in the top of the fixing seat 21, the locking groove 23 is formed in the bottom wall of the inserting groove 24 in a communicated mode, the limiting groove 22 is formed in the bottom wall of the locking groove 23 in a communicated mode, the radius of the limiting groove 22 is larger than that of the locking groove 23, and the radius of the locking groove 23 is smaller than that of the inserting groove 24.
As a further proposal of the utility model, the top and the bottom of the insertion groove 24 are respectively provided with a chamfer angle with the top of the fixed seat 21 and the top of the locking groove 23.
The radius of the limiting groove 22 is larger than that of the locking groove 23, so that the valve rod 52 is limited in the limiting groove 22, and the diaphragm is not prone to being inclined when the valve rod 52 pushes the diaphragm to work; the chamfered configuration results in less friction between the valve stem 52 and the closure unit and less power loss.
As a further aspect of the present invention, the pressure-bearing unit includes: combination crown plate 31, the pressure-bearing is protruding 32 sets up to the ring form, the inner wall of pressure-bearing is protruding 32 connect through integrated into one piece in the diapire of the outer wall of fixing base 21, the outer wall of pressure-bearing is protruding 32 with combination crown plate 31 fixed connection, middle part between the inner wall of pressure-bearing is protruding 32 and the outer wall is to keeping away from seal 11 one side is protruding, just the protruding 32 inner wall bottom of pressure-bearing the lateral wall top of seal 11 with middle part between the protruding inner wall of pressure-bearing and the outer wall becomes a smooth curved surface.
The concave bulge arranged in the pressure-bearing bulge 32 enables the pressure-bearing bulge 32 to bear a part of the pressure of the liquid flow and guide the liquid flow.
As a further aspect of the present invention, the guiding unit includes: the base plate 41, tolerance groove 42, base plate 41 bottom fixedly connected with combination crown plate 31, base plate 41 sets up to the ring form, just tolerance groove 42 has been seted up to the lateral wall of base plate 41.
Through the matching of the tolerance groove 42 and the tolerance rib, the base plate 41 is integrally fixed at the bottom of the valve cover 53, and the movement direction of the diaphragm driven by the valve rod 52 is limited.
As a further aspect of the present invention, the outer wall of the fixing seat 21 and the top wall of the pressure-bearing protrusion 32 are provided with a chamfer therebetween, the inner wall of the base plate 41 and the top wall of the pressure-bearing protrusion 32 are provided with a chamfer therebetween, and the combined ring 31 and the outer wall of the pressure-bearing protrusion 32 are provided with a chamfer therebetween.
By arranging a plurality of chamfers, liquid flow can smoothly flow from the sealing body 11 to the pressure-bearing protrusion 32, so that liquid flow impact on the sealing body 11 and the pressure-bearing protrusion 32 is further reduced.
A pneumatic diaphragm valve comprises a valve body 51, a valve rod 52 and a valve cover 53, and further comprises a sealing diaphragm for the pneumatic diaphragm valve, wherein the top of the valve body 51 is provided with a sealing element matched with the bottom of a sealing body 11, the valve rod 52 is matched with a locking unit in a sliding mode, the valve rod 52 drives the sealing body 11 to slide through the locking unit, the inner wall of the valve cover 53 is provided with a tolerance rib matched with a tolerance groove 42, and the valve cover 53 is fixed with a base plate 41 through the tolerance groove 42.
The working principle is as follows: the whole diaphragm can be produced in an integrated forming mode, the sealing body 11 is obliquely arranged, so that the sealing body 11 is gradually attached to the sealing element when pressed down, the sealing effect is achieved, the friction between the sealing element and the sealing body 11 is reduced, the sealing effect is good, meanwhile, the sealing body 11 is obliquely and smoothly arranged with a curved surface, so that the contact area is large when liquid flows pass through, the impact force of the liquid flows on the sealing body 11 is small, the abrasion of the sealing body 11 is small, and the service life is long; the radius of the limiting groove 22 is larger than that of the locking groove 23, so that the valve rod 52 is limited in the limiting groove 22, and when the valve rod 52 pushes the diaphragm to work, the diaphragm is not prone to being inclined, and the sealing effect is good; the chamfered configuration results in less friction between the valve stem 52 and the closure unit and less power loss. The pressure-bearing bulge 32 can bear a part of liquid flow pressure and guide liquid flow through the concave bulge arranged in the pressure-bearing bulge 32; through the arrangement of the plurality of chamfers, liquid flow can smoothly flow from the sealing body 11 to the pressure-bearing bulge 32, and the liquid flow impact on the sealing body 11 and the pressure-bearing bulge 32 is further reduced.
Claims (8)
1. A sealing diaphragm for a pneumatic diaphragm valve, characterized by:
a sealing body is arranged on the outer side of the shell,
a guiding unit for guiding the moving part of the moving part,
a locking unit is arranged on the base plate,
a pressure-bearing unit,
the sealing structure is characterized in that the locking unit is fixedly connected to the top of the sealing body, the pressure-bearing unit is fixedly mounted on the outer wall of the sealing body, the guide unit is arranged on the outer side of the pressure-bearing unit, the locking unit is matched and limited in the movement direction of the sealing body through a groove key, the pressure-bearing unit is slowed down in liquid flow impact through a curved surface structure, and the guide unit is fixed to the sealing body through tolerance matching.
2. The sealing diaphragm for a pneumatic diaphragm valve of claim 1 wherein:
the sealing body is in a round table shape, the radius of the bottom of the sealing body is larger than that of the top of the sealing body, and a chamfer is arranged between the bottom surface of the sealing body and the side surface of the sealing body.
3. The sealing diaphragm for a pneumatic diaphragm valve of claim 2 wherein:
the locking unit includes:
a fixed seat is arranged on the base body,
a limiting groove is arranged on the upper surface of the upper cover,
the locking groove is formed in the upper end of the locking groove,
the insertion groove is arranged on the upper surface of the shell,
the top of the sealing body is fixedly provided with the fixing seat, the top of the fixing seat is provided with the inserting groove, the bottom wall of the inserting groove is communicated with the locking groove, the bottom wall of the locking groove is communicated with the limiting groove, the radius of the limiting groove is larger than that of the locking groove, and the radius of the locking groove is smaller than that of the inserting groove.
4. The sealing diaphragm for a pneumatic diaphragm valve of claim 3 wherein:
chamfers are arranged between the top and the bottom of the inserting groove and the top of the fixed seat and the top of the locking groove respectively.
5. The sealing diaphragm for a pneumatic diaphragm valve of claim 3 wherein:
the pressure-bearing unit includes:
the combination of the ring plate and the ring plate,
a pressure-bearing bulge is arranged on the upper surface of the base,
the bearing bulge is arranged into a circular ring shape, the inner wall of the bearing bulge is connected with the bottom wall of the outer wall of the fixing seat through integrated forming, the outer wall of the bearing bulge is fixedly connected with the combined annular plate, the middle part between the inner wall and the outer wall of the bearing bulge is towards being far away from the bulge on one side of the sealing body, and the bottom end of the inner wall of the bearing bulge, the top end of the side wall of the sealing body and the middle part between the inner wall and the outer wall of the bearing bulge form a smooth curved surface.
6. The sealing diaphragm for a pneumatic diaphragm valve of claim 5 wherein:
the guide unit includes:
a substrate, a first electrode and a second electrode,
the tolerance groove is formed in the upper surface of the shell,
the bottom of the base plate is fixedly connected with the combined annular plate, the base plate is in an annular shape, and the tolerance groove is formed in the side wall of the base plate.
7. The sealing diaphragm for a pneumatic diaphragm valve of claim 6 wherein:
a chamfer is arranged between the outer wall of the fixed seat and the top wall of the pressure-bearing bulge,
a chamfer is arranged between the inner wall of the base plate and the top wall of the pressure-bearing bulge,
and a chamfer is arranged between the combined ring and the outer wall of the pressure bearing bulge.
8. A pneumatic diaphragm valve comprises a valve body, a valve rod and a valve cover, and is characterized in that: the sealing diaphragm for the pneumatic diaphragm valve of claim 7, wherein a sealing element adapted to the bottom of the sealing body is arranged at the top of the valve body, the valve rod is slidably adapted to the locking unit, the valve rod drives the sealing body to slide through the locking unit, tolerance ribs adapted to the tolerance grooves are formed on the inner wall of the valve cover, and the valve cover is fixed to the base plate through the tolerance grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220068233.5U CN217056429U (en) | 2022-01-11 | 2022-01-11 | Sealing diaphragm for pneumatic diaphragm valve and pneumatic diaphragm valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220068233.5U CN217056429U (en) | 2022-01-11 | 2022-01-11 | Sealing diaphragm for pneumatic diaphragm valve and pneumatic diaphragm valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217056429U true CN217056429U (en) | 2022-07-26 |
Family
ID=82482035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220068233.5U Active CN217056429U (en) | 2022-01-11 | 2022-01-11 | Sealing diaphragm for pneumatic diaphragm valve and pneumatic diaphragm valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217056429U (en) |
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2022
- 2022-01-11 CN CN202220068233.5U patent/CN217056429U/en active Active
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