CN211398726U - Pressure difference pilot valve - Google Patents
Pressure difference pilot valve Download PDFInfo
- Publication number
- CN211398726U CN211398726U CN201922202420.9U CN201922202420U CN211398726U CN 211398726 U CN211398726 U CN 211398726U CN 201922202420 U CN201922202420 U CN 201922202420U CN 211398726 U CN211398726 U CN 211398726U
- Authority
- CN
- China
- Prior art keywords
- valve body
- valve
- spring
- piston
- inner chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 7
- 230000008676 import Effects 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 4
- 239000012528 membrane Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Landscapes
- Safety Valves (AREA)
Abstract
The utility model relates to a pressure difference pilot valve, including the valve body of taking the inner chamber and connecting the disk seat in the valve body below, be equipped with external air source on the lateral wall of valve body, the inner chamber lower part of valve body is equipped with the piston, the piston bottom is equipped with elastic diaphragm, is equipped with spring assembly in the inner chamber of piston top, spring assembly includes the spring, is located the last cushion of spring upper end and is located the lower cushion of its lower extreme, the centre of cushion is provided with the steel ball down, and the top of valve body is equipped with the regulation pole that stretches into its inner chamber and pass the cushion, set up the export that runs through its top down in the middle of the disk seat, evenly seted. The steel ball is arranged between the lower cushion block and the piston of the spring assembly, fluid is applied to the pressure of the elastic diaphragm and then applied to the lower cushion block after passing through the piston, the spring cannot receive sudden force, and the torsion of the spring is flattened through the steel ball, so that the service life of the spring is ensured; the utility model discloses simple structure, the installation is maintained conveniently.
Description
Technical Field
The utility model belongs to the technical field of the pilot valve technique and specifically relates to a pressure differential pilot valve.
Background
A differential pressure pilot valve is a valve used for differential pressure regulation, either directly mounted on the main valve or connected to a valve seat in an external pipe for controlling one or more main valves. The existing pressure difference pilot valve has the following defects: 1) the lower end of the spring is directly connected with the piston, when the fluid pressure is high, the pressure directly acts on the piston to enable the spring to generate certain torsion, the service life of the spring is influenced, and finally the valve cannot be normally opened and closed; 2) the structure is complicated, and the installation and maintenance are difficult.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: overcomes the defects in the prior art and provides a pressure difference pilot valve.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a pressure difference pilot valve, includes the valve body of taking the inner chamber and connects the disk seat in the valve body below, be equipped with external air source interface on the lateral wall of valve body, the inner chamber lower part of valve body is equipped with the piston, the piston bottom is equipped with elastic diaphragm, is equipped with spring assembly in the inner chamber of piston top, spring assembly includes the spring, is located the last cushion of spring upper end and is located its lower cushion of lower extreme, the centre of cushion is provided with the steel ball down, and the top of valve body is equipped with the regulation pole that stretches into its inner chamber and pass the cushion, set up the export that runs through from top to bottom in the middle of the disk.
In order to ensure the connection sealing property of the valve body and the valve seat, the elastic membrane is particularly arranged at the connection part of the valve body and the valve seat, and the upper part and the lower part of the edge of the elastic membrane are respectively provided with a sealing gasket.
Furthermore, the valve body is in threaded connection with the valve seat and clamps the elastic diaphragm and the upper and lower sealing gaskets.
In order to facilitate manual adjustment, the adjusting rod is connected to the top of the valve body through an adjusting rod seat, and the adjusting rod seat is arranged on the top of the valve body in a protruding mode and is integrated with the valve body.
In order to facilitate the installation of the adjusting rod, furthermore, a valve cap covering the adjusting rod is connected to the periphery of the adjusting rod seat in a threaded manner.
Further, the inlet is specifically provided with 4.
The utility model has the advantages that: the steel ball is arranged between the lower cushion block and the piston of the spring assembly, fluid is applied to the pressure of the elastic diaphragm and then applied to the lower cushion block after passing through the piston, the spring cannot receive sudden force, and the torsion of the spring is flattened through the steel ball, so that the service life of the spring is ensured; the utility model discloses simple structure, the installation is maintained conveniently.
Drawings
The present invention will be further described with reference to the accompanying drawings and embodiments.
Fig. 1 is a schematic structural view of the present invention when closed.
Fig. 2 is a schematic structural view when the present invention is opened.
In the figure: 1. the valve comprises a valve body, 2 parts of a valve seat, 3 parts of an external air source connector, 4 parts of a piston, 5 parts of an elastic diaphragm, 6 parts of a spring assembly, 7 parts of an adjusting rod, 8 parts of a sealing gasket, 9 parts of an adjusting rod seat, 10 parts of a valve cap, 21 parts of an outlet, 22 parts of an inlet, 61 parts of a spring, 62 parts of an upper cushion block, 63 parts of a lower cushion block and 64 parts of a steel ball.
Detailed Description
The invention will now be further described with reference to the accompanying drawings. The drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1 or fig. 2, a pressure difference pilot valve, including a valve body 1 with an inner cavity and a valve seat 2 connected below the valve body 1, an external air source interface 3 is arranged on the side wall of the valve body 1, a piston 4 is arranged on the lower part of the inner cavity of the valve body 1, an elastic membrane 5 is arranged at the bottom of the piston 4, a spring assembly 6 is arranged in the inner cavity above the piston 4, the spring assembly 6 includes a spring 61, an upper cushion block 62 positioned at the upper end of the spring 61 and a lower cushion block 63 positioned at the lower end thereof, a steel ball 64 is arranged in the middle of the lower cushion block 63, an adjusting rod 7 extending into the inner cavity of the valve body 1 and penetrating through the upper cushion block 62 is arranged at the top of the valve body 1.
In this embodiment, the elastic diaphragm 5 is specifically disposed at the joint of the valve body 1 and the valve seat 2, and a gasket 8 is disposed above and below the edge of the elastic diaphragm 5. The valve body 1 is in threaded connection with the valve seat 2 and clamps the elastic diaphragm 5 and the upper and lower sealing gaskets 8.
In this embodiment, the adjusting rod 7 is connected to the top of the valve body 1 through the adjusting rod seat 9, and the adjusting rod seat 9 is protruded from the top of the valve body 1 and integrated with the valve body 1. A valve cap 10 covering the adjusting rod 7 is connected to the outer circumference of the adjusting rod seat 9 by screw threads.
As shown in fig. 1, the pressure of the control fluid entering the inlet 22 (corresponding to a in the drawing) acts on the elastic diaphragm 5, and when the force is smaller than the sum of the force of the spring 61 and the force from the external air source interface 3, the pilot valve is in a closed state; as shown in fig. 2, when the difference in the control fluid pressure through the inlet 22 (corresponding to a in the figure) and the external gas supply port 3 is greater than the set spring 61 force, the pilot valve is in an open state, and then through the outlet 21 (corresponding to B in the figure), pressure acts on the main valve piston, which regulates the opening of the main valve.
In addition, when the adjusting rod 7 is rotated clockwise, the opening pressure of the pilot valve can be increased; when the regulating rod 7 is rotated anticlockwise, the opening pressure of the pilot valve can be reduced. The pilot valve pressure regulation range of the embodiment is 0 to 10 Bars.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable people skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (6)
1. The utility model provides a pressure differential pilot valve, includes valve body (1) of taking the inner chamber and connects disk seat (2) in valve body (1) below, its characterized in that: be equipped with external air source interface (3) on the lateral wall of valve body (1), the inner chamber lower part of valve body (1) is equipped with piston (4), piston (4) bottom is equipped with elastic diaphragm (5), is equipped with spring unit (6) in the inner chamber of piston (4) top, spring unit (6) include spring (61), be located last cushion (62) of spring (61) upper end and be located lower cushion (63) of its lower extreme, the centre of lower cushion (63) is provided with steel ball (64), and the top of valve body (1) is equipped with regulation pole (7) that stretch into its inner chamber and pass last cushion (62), set up in the middle of disk seat (2) and run through export (21) from top to bottom, evenly seted up on disk seat (2) of export (21) periphery a plurality of imports (22).
2. The differential pressure pilot valve as defined in claim 1, wherein: the elastic diaphragm (5) is specifically arranged at the joint of the valve body (1) and the valve seat (2), and a sealing gasket (8) is respectively arranged on the upper side and the lower side of the edge of the elastic diaphragm (5).
3. The differential pressure pilot valve as defined in claim 2, wherein: the valve body (1) is in threaded connection with the valve seat (2) and clamps the elastic diaphragm (5) and the upper and lower sealing gaskets (8) of the elastic diaphragm.
4. The differential pressure pilot valve as defined in claim 1, wherein: the adjusting rod (7) is connected to the top of the valve body (1) through an adjusting rod seat (9), and the adjusting rod seat (9) is arranged on the top of the valve body (1) in a protruding mode and is of an integrated structure with the valve body (1).
5. The differential pressure pilot valve as defined in claim 4, wherein: the periphery of the adjusting rod seat (9) is connected with a valve cap (10) which covers the adjusting rod (7) through threads.
6. The differential pressure pilot valve as defined in claim 1, wherein: the number of the inlets (22) is 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922202420.9U CN211398726U (en) | 2019-12-10 | 2019-12-10 | Pressure difference pilot valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922202420.9U CN211398726U (en) | 2019-12-10 | 2019-12-10 | Pressure difference pilot valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211398726U true CN211398726U (en) | 2020-09-01 |
Family
ID=72210652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922202420.9U Active CN211398726U (en) | 2019-12-10 | 2019-12-10 | Pressure difference pilot valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211398726U (en) |
-
2019
- 2019-12-10 CN CN201922202420.9U patent/CN211398726U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101298890B (en) | Adjustable compression release valve | |
| CN211371392U (en) | Novel integrated multifunctional pressure reducing valve | |
| CN211398726U (en) | Pressure difference pilot valve | |
| CN203686277U (en) | Safety relief valve | |
| CN214119066U (en) | Outlet pressure control valve for refrigeration system | |
| CN201225431Y (en) | Adjustable pressure relief valve | |
| CN211398682U (en) | Suction pressure control pilot valve | |
| CN211398683U (en) | Constant pressure guide valve | |
| CN210106709U (en) | Manual-automatic integrated single-seat regulating valve | |
| CN103322253A (en) | Pressure feedback reducing valve | |
| CN209876018U (en) | Pilot diaphragm type pressure reducing valve | |
| US6378548B1 (en) | Varying size diaphragm valve assemblies utilizing diaphragm of uniform size | |
| CN210950075U (en) | Pressure reducer with stable outlet pressure | |
| CN114658890A (en) | Vehicle-mounted gas pressure stabilizing valve | |
| CN207864689U (en) | A kind of threeway pneumatic diaphragm control valve | |
| CN201180831Y (en) | Adjustable pressure reducing valve | |
| CN212297806U (en) | Pressure regulator for bottled liquefied petroleum gas | |
| CN110985733A (en) | A self-operated pressure balance valve | |
| CN101749475B (en) | Electromagnetic regulation valve device for flow measurement control | |
| CN217842847U (en) | Self-closing valve with good sealing performance | |
| CN220134713U (en) | Novel adjustable differential pressure valve | |
| CN221922039U (en) | Cage type single seat valve with convertible structure | |
| CN211398586U (en) | Adjustable main valve | |
| CN204677826U (en) | A kind of pressure regulation safety check | |
| CN222011105U (en) | A vacuum external pilot precision pressure reducing valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |