CN214618112U - Plastic driving cylinder of pneumatic diaphragm valve - Google Patents
Plastic driving cylinder of pneumatic diaphragm valve Download PDFInfo
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- CN214618112U CN214618112U CN202120467543.XU CN202120467543U CN214618112U CN 214618112 U CN214618112 U CN 214618112U CN 202120467543 U CN202120467543 U CN 202120467543U CN 214618112 U CN214618112 U CN 214618112U
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- pneumatic diaphragm
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- diaphragm valve
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Abstract
The utility model discloses a plastic driving cylinder of pneumatic diaphragm valve, including the cylinder block, the cylinder block passes through the cylinder head and seals, be provided with the piston in the cylinder block, the fixed valve rod that is provided with in piston center, one end of valve rod runs through the cylinder block and is connected to the case, the other end of valve rod is connected to the pilot lever, pilot lever sliding connection is to the cylinder head, be provided with the spring between piston and the cylinder head; the cylinder cover is in threaded connection with the cylinder body, and the cylinder cover and the cylinder body are made of plastics. The utility model uses the cylinder cover and the cylinder body made of plastic materials to replace the cylinder cover and the cylinder body made of common metal materials, thereby effectively reducing the weight of the equipment; the cylinder cover and the cylinder body are connected by threads, so that the structure is simple, the size of the cylinder and the overall size of the valve are effectively reduced, and the installation space required by the valve is reduced; the volume of the cylinder is reduced, the weight is reduced, and the cost is reduced.
Description
Technical Field
The utility model relates to a cylinder especially relates to a pneumatic diaphragm valve's plastics drive actuating cylinder.
Background
The diaphragm valve is the biggest difference from other valves: a non-stuffing box structure is adopted; the membrane makes the corrosive medium in the flow passage and all the driving parts in a completely isolated state, thereby avoiding the defects of 'running, overflowing, dripping, leaking' and the like of the common valve. The diaphragm valve has smooth flow passage and small flow resistance, so that larger flow can be obtained. Because the sealing element is a rubber diaphragm with rich elasticity. Thus also having a better tightness and a minimum closing force. The diaphragm valve consists of a valve body, a valve cover, a valve core, a valve rod, a diaphragm and a driving part. The opening and closing of the pneumatic diaphragm valve are realized by supplying or cutting off air to the air cylinder by an air source. When air is supplied, the valve clack drives the diaphragm to ascend to open the passage; when the air is lost, the valve is closed.
However, the conventional pneumatic diaphragm valve has a disadvantage: because the cylinder body and the cylinder cover of the common pneumatic diaphragm valve are made of metal materials, the valve is heavy as a whole, and the cylinder body and the cylinder cover are connected through bolts, so that the valve is large in size, large in required installation space and not beneficial to field installation.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a pneumatic diaphragm valve's plastics drive actuating cylinder, use the cylinder head and the cylinder body of plastics material to replace the cylinder head and the cylinder body of metal material, effectively reduced weight.
The utility model provides a technical scheme who adopts for solving above-mentioned technical problem provides a plastics drive cylinder of pneumatic diaphragm valve, including the cylinder block, the cylinder block passes through the cylinder head and seals, be provided with the piston in the cylinder block, the fixed valve rod that is provided with in piston center, one end of valve rod runs through the cylinder block and is connected to the case, the other end of valve rod is connected to the indicator lever, the indicator lever sliding connection is to the cylinder head, be provided with the spring between piston and the cylinder head; the cylinder cover is in threaded connection with the cylinder body, and the cylinder cover and the cylinder body are made of plastics.
Further, the side wall of the cylinder head, which is in contact with the cylinder block, is provided with an external thread, the side wall of the cylinder block, which is in contact with the cylinder head, is provided with an internal thread matched with the external thread, and the cylinder block and the cylinder head are in sealing connection with the external thread through the matched internal thread.
Furthermore, the outer side surface of the indicating rod is provided with a limiting protrusion, and the limiting protrusion limits the moving distance of the valve rod.
Further, a first sealing groove is formed in the circumferential direction of the side wall, in contact with the cylinder block, of the piston, and a first sealing ring is arranged in the first sealing groove.
Further, a second sealing groove is formed in the circumferential direction of the side wall, in contact with the valve rod, of the cylinder body, and a second sealing ring is arranged in the second sealing groove.
Further, the piston is provided with a third seal groove in the lateral wall of being connected with the valve rod, be provided with the third sealing washer in the third seal groove.
Further, the cylinder head is provided with a fourth sealing groove on the side wall connected with the indicating rod, and a fourth sealing ring is arranged in the fourth sealing groove.
Furthermore, the piston is made of plastic, and the first sealing ring is made of rubber.
The utility model discloses contrast prior art has following beneficial effect: the plastic driving cylinder of the pneumatic diaphragm valve provided by the utility model uses the cylinder cover and the cylinder body made of plastic materials to replace the cylinder cover and the cylinder body made of common metal materials, thereby effectively reducing the weight of the equipment; the cylinder cover and the cylinder body are connected by threads, so that the structure is simple, the size of the cylinder and the overall size of the valve are effectively reduced, and the installation space required by the valve is reduced; the volume of the cylinder is reduced, the weight is reduced, and the cost is reduced.
Drawings
Fig. 1 is a schematic structural view of a plastic driving cylinder of a pneumatic diaphragm valve in an embodiment of the present invention.
In the figure:
1. a cylinder block; 2. a second seal ring; 3. a valve stem; 4. a piston; 5. a first seal ring; 6. a third seal ring; 7. a spring; 8. a cylinder head; 9. an indication lever; 10. and a fourth seal ring.
Detailed Description
The invention is further described with reference to the following figures and examples.
Fig. 1 is a schematic structural view of a plastic driving cylinder of a pneumatic diaphragm valve in an embodiment of the present invention.
Referring to fig. 1, the plastic driving cylinder of the pneumatic diaphragm valve according to the embodiment of the present invention includes a cylinder block 1, the cylinder block 1 is closed by a cylinder head 8, a piston 4 is disposed in the cylinder block 1, a valve rod 3 is fixedly disposed in the center of the piston 4, one end of the valve rod 3 penetrates through the cylinder block 1 and is connected to a valve core, the other end of the valve rod 3 is connected to an indication rod 9, the indication rod 9 is slidably connected to the cylinder head 8, and a spring 7 is disposed between the piston 4 and the cylinder head 8; the cylinder head 8 is in threaded connection with the cylinder block 1, and the cylinder head 8 and the cylinder block 1 are made of plastics. The materials of the cylinder body 1 and the cylinder cover 8 are replaced by plastic materials from common metal materials, so that the weight is greatly reduced; and the cylinder body 1 and the cylinder cover 8 are in threaded connection, so that bolt connection is avoided, and the volume of the cylinder is effectively reduced.
Specifically, the side wall of the cylinder head 8 contacting the cylinder block 1 is provided with an external thread, the side wall of the cylinder block 1 contacting the cylinder head 8 is provided with an internal thread matching the external thread, and the cylinder block 1 and the cylinder head 8 are connected with the external thread in a sealing manner through the matching internal thread.
Specifically, the outer side surface of the indication rod 9 is provided with a limit protrusion which limits the movement distance of the valve rod 3, and further limits the movement displacement of the diaphragm of the pneumatic diaphragm valve.
Specifically, a first sealing groove is formed in the circumferential direction of the side wall of the piston 4, which is in contact with the cylinder block 1, and a first sealing ring 5 is arranged in the first sealing groove; a second sealing groove is formed in the circumferential direction of the side wall, in contact with the valve rod 3, of the cylinder body 1, and a second sealing ring 2 is arranged in the second sealing groove; a third sealing groove is formed in the side wall, connected with the valve rod 3, of the piston 4, and a third sealing ring 6 is arranged in the third sealing groove; the cylinder head 8 is provided with a fourth seal groove in a side wall connected to the indicator stem 9, and a fourth seal ring 10 is provided in the fourth seal groove. The sealing effect is ensured by the arrangement of the sealing ring 2, and the cleanness of the cavity where the spring 7 is arranged is ensured.
Preferably, the piston 4 is made of plastic, and the first sealing ring 5 is made of rubber.
In summary, the plastic driving cylinder of the pneumatic diaphragm valve of the embodiment of the present invention uses the cylinder head 8 and the cylinder body 1 made of plastic material to replace the cylinder head and the cylinder body made of common metal material, thereby effectively reducing the weight of the device; the cylinder cover 8 and the cylinder body 1 are connected by threads, the structure is simple, the size of the cylinder and the overall size of the valve are effectively reduced, and the installation space required by the valve is reduced; the volume of the cylinder is reduced, the weight is reduced, and the cost is reduced.
Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A plastic driving cylinder of a pneumatic diaphragm valve is characterized by comprising a cylinder body, wherein the cylinder body is closed through a cylinder cover, a piston is arranged in the cylinder body, a valve rod is fixedly arranged in the center of the piston, one end of the valve rod penetrates through the cylinder body to be connected to a valve core, the other end of the valve rod is connected to an indicating rod, the indicating rod is connected to the cylinder cover in a sliding mode, and a spring is arranged between the piston and the cylinder cover; the cylinder cover is in threaded connection with the cylinder body, and the cylinder cover and the cylinder body are made of plastics.
2. The plastic drive cylinder for a pneumatic diaphragm valve of claim 1, wherein the side wall of the cylinder head in contact with the cylinder block is provided with an external thread, the side wall of the cylinder block in contact with the cylinder head is provided with an internal thread matching the external thread, and the cylinder block and the cylinder head are sealingly connected with the external thread through the matching internal thread.
3. The plastic drive cylinder for a pneumatic diaphragm valve of claim 1, wherein an outer side surface of said indicator stem is provided with a limit projection, said limit projection defining a travel distance of the valve stem.
4. The plastic drive cylinder for a pneumatic diaphragm valve of claim 1, wherein a first sealing groove is circumferentially provided in a sidewall of the piston contacting the cylinder block, and a first sealing ring is provided in the first sealing groove.
5. The plastic drive cylinder for a pneumatic diaphragm valve of claim 1, wherein a second sealing groove is circumferentially provided in a sidewall of the cylinder block in contact with the valve stem, and a second sealing ring is provided in the second sealing groove.
6. The plastic drive cylinder for a pneumatic diaphragm valve of claim 1, wherein said piston has a third seal groove in a sidewall connecting to said valve stem, said third seal groove having a third seal ring disposed therein.
7. The plastic drive cylinder for a pneumatic diaphragm valve of claim 1, wherein said cylinder head is provided with a fourth seal groove in a sidewall connected to the guide rod, said fourth seal groove having a fourth seal ring disposed therein.
8. The plastic drive cylinder for a pneumatic diaphragm valve of claim 4, wherein said piston is made of plastic and said first seal ring is made of rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120467543.XU CN214618112U (en) | 2021-03-04 | 2021-03-04 | Plastic driving cylinder of pneumatic diaphragm valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120467543.XU CN214618112U (en) | 2021-03-04 | 2021-03-04 | Plastic driving cylinder of pneumatic diaphragm valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214618112U true CN214618112U (en) | 2021-11-05 |
Family
ID=78392498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120467543.XU Active CN214618112U (en) | 2021-03-04 | 2021-03-04 | Plastic driving cylinder of pneumatic diaphragm valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214618112U (en) |
-
2021
- 2021-03-04 CN CN202120467543.XU patent/CN214618112U/en active Active
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| GR01 | Patent grant |