CN202812359U - Pilot valve for relief valve - Google Patents
Pilot valve for relief valve Download PDFInfo
- Publication number
- CN202812359U CN202812359U CN 201220386762 CN201220386762U CN202812359U CN 202812359 U CN202812359 U CN 202812359U CN 201220386762 CN201220386762 CN 201220386762 CN 201220386762 U CN201220386762 U CN 201220386762U CN 202812359 U CN202812359 U CN 202812359U
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- Prior art keywords
- valve body
- valve
- center
- pole
- spring
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Abstract
The utility model belongs to the technical field of valve devices and equipment and particularly relates to a pilot valve for a relief valve. The pilot valve comprises an upper valve body and a lower valve body, the top end of the upper valve body is provided with an inner threaded portion, a pressure setting screw is penetratingly arranged in the inner threaded portion, and the lower valve body is provided with an upstream pipeline and a downstream pipeline which are both communicated with an inner cavity. The pilot valve further comprises a linkage closing system arranged on a central line, and the linkage closing system comprises a central rod with lower end penetrating from the upstream pipeline. A spring, a film and a retaining piece are sequentially penetratingly arranged on the central rod from top to bottom, the spring is arranged at the top end of the central rod, the film is fixed in the middle of the central rod through a clamp block, the edges of the film are clamped between the upper valve body and the lower valve body, and the retaining piece is fixed at the bottom end of the central rod and rightly aligns to an orifice of the upstream pipeline. A press block is arranged at the top end of the spring, and the bottom end of the pressure setting screw is pressed against on the press block.
Description
Technical field
The utility model belongs to the control valve unit equipment technical field, relates in particular to a kind of pilot valve for reduction valve.
Background technique
Pilot valve has obtained using more and more widely in industry as a kind of a kind of Auxiliary valves of controlling the control mechanism in other valve or the element and using.This type of valve is the functional valve of reduction valve external control pipeline core, is used for regulating the opening and closing of main valve, thereby realizes the control to the main valve downstream pressure.
The model utility content
The utility model provides the pilot valve that is used for reduction valve that a kind of structural design is novel, control characteristic is good for solving the technical problem that exists in the known technology.
The technological scheme that the utility model is taked for the technical problem that exists in the solution known technology is: the pilot valve that is used for reduction valve comprises upper valve body and lower valve body; The top of described upper valve body is provided with internal thread part, is equipped with the pressure setting screw in this internal thread part; Described lower valve body is provided with upstream and the downstream pipeline that all is communicated to its inner chamber; Also comprise the interlock shutdown system that is positioned on the center line, this system comprises the center-pole that the lower end passes from described upstream, on described center-pole, be equipped with successively spring, diaphragm and catch from top to bottom, described spring is positioned at the top of center-pole, described diaphragm is located between described upper valve body and the lower valve body by middle part, its edge clamping that fixture block is fixed in center-pole, and described catch is fixed in the center-pole bottom, over against the mouth of pipe of described upstream; Top at described spring also is provided with briquetting, and the bottom of described pressure setting screw is against on the described briquetting.
Its advantage and good effect are: the utility model structural design is novel, and installation and maintenance is convenient.Upstream is connected to the high pressure side of reduction valve main valve, the downstream pipeline is connected to the low voltage side of reduction valve main valve, by regulating the position of pressure setting screw, make spring produce deformation and then produce the trend that elastic force has center-pole to move downward, this elastic force is compared with the pressure of downstream media: when downstream pressure medium during less than spring force, center-pole moves down, catch breaks away from the critical point of upstream, be that pilot valve is opened, the upstream replenishes the medium adherence pressure downstream, until spring force equates with downstream pressure, center-pole resets, and catch seals the mouth of pipe of upstream again, and control characteristic is good.The control accuracy of this pilot valve is high, can reach zero pressure difference without leak condition; Pilot pressure is in extensive range, can realize Decompression Controlling in hyperbaric environment and environment under low pressure.
Preferably: described internal thread part is the nut that is fixed in described upper valve body top.
Preferably: described diaphragm is the high-strength rubber material.
Description of drawings
Fig. 1 is sectional view of the present utility model.
Among the figure: 1, pressure setting screw; 2, nut; 3, upper valve body; 4, downstream pipeline; 5, briquetting; 6, spring; 7, diaphragm; 8, upstream; 9, catch; 10, interlock shutdown system; 11, lower valve body.
Embodiment
For further understanding summary of the invention of the present utility model, Characteristic, hereby exemplify following examples, and cooperate accompanying drawing to be described in detail as follows:
See also Fig. 1, the utility model comprises upper valve body 3 and the lower valve body 11 that is docking together.
Also comprise the interlock shutdown system 10 that is positioned on the center line.This system comprises the center-pole that the lower end passes from upstream 8, be equipped with successively spring 6, diaphragm 7 and catch 9 on this center-pole from top to bottom.Its medi-spring 6 is positioned at the top of center-pole.Diaphragm 7 is located between upper valve body 3 and the lower valve body 11 by middle part, its edge clamping that fixture block is fixed in center-pole, and diaphragm 7 is chosen for the high-strength rubber material herein, and this material should have large tear strength and large Young's modulus.Diaphragm 7 has the medium part with what the inner chamber of pilot valve was divided into top without medium part and bottom.Catch 9 is fixed in the center-pole bottom, over against the mouth of pipe of upstream 8.
Top at spring 6 also is provided with briquetting 5, and the bottom of pressure setting screw 1 is against on this briquetting 5.
During use, upstream 8 is connected to the high pressure side of reduction valve main valve, the low voltage side that downstream pipeline 4 is connected to the reduction valve main valve, sets the pressure of reduction valve main valve downstream media by pressure setting screw 1.Each parts of interlock shutdown system 10 are subjected to the effect of following several power: 1. elastic force, namely regulate the power that the position of pressure setting screw 1 produces spring 6 compressions, and direction is downward; 2. the pressure that downstream media pressure that diaphragm 7 is produced, size approximate downstream media multiply by the surface area of diaphragm 7, and direction upwards; 3. the pressure that upstream medium pressure that catch 9 is produced, size approximate the upstream medium multiply by the surface area of catch 9, and direction is downward; 4. the pressure that downstream media pressure that catch 9 is produced, size approximate downstream media multiply by the surface area of catch 9, and direction upwards.Because the area of catch 9 is less, the elastic force that effect two pressure approximate equilibriums thereon, the switch of the shutdown system 10 that therefore links depend on spring 6 and downstream media are to the equilibrium condition between the pressure of diaphragm 7 generations.When pressure that elastic force produces diaphragm 7 greater than downstream media, center-pole is downward, and catch 9 breaks away from the mouth of pipe of upstream 8, and on high-tension side medium enters low voltage side through upstream 8, downstream pipeline 4, has been equivalent to replenish the pressure of downstream media; When pressure that elastic force produces diaphragm 7 less than downstream media, center-pole upwards, catch 9 seals the mouth of pipe of upstream 8 again, makes the pressure of downstream media keep constant.
Claims (3)
1. a pilot valve that is used for reduction valve is characterized in that: comprise upper valve body (3) and lower valve body (11); The top of described upper valve body (3) is provided with internal thread part, is equipped with pressure setting screw (1) in this internal thread part; Described lower valve body (11) is provided with upstream (8) and the downstream pipeline (4) that all is communicated to its inner chamber; Also comprise the interlock shutdown system (10) that is positioned on the center line, this system comprises the center-pole that the lower end passes from described upstream (8), on described center-pole, be equipped with successively spring (6), diaphragm (7) and catch (9) from top to bottom, described spring (6) is positioned at the top of center-pole, described diaphragm (7) is located between described upper valve body (3) and the lower valve body (11) by middle part, its edge clamping that fixture block is fixed in center-pole, and described catch (9) is fixed in the center-pole bottom, over against the mouth of pipe of described upstream (8); Also be provided with briquetting (5) on the top of described spring (6), the bottom of described pressure setting screw (1) is against on the described briquetting (5).
2. according to the pilot valve for reduction valve claimed in claim 1, it is characterized in that: described internal thread part is for being fixed in the nut at described upper valve body (3) top.
3. according to the pilot valve for reduction valve claimed in claim 1, it is characterized in that: described diaphragm (7) is the high-strength rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220386762 CN202812359U (en) | 2012-08-06 | 2012-08-06 | Pilot valve for relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220386762 CN202812359U (en) | 2012-08-06 | 2012-08-06 | Pilot valve for relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202812359U true CN202812359U (en) | 2013-03-20 |
Family
ID=47871229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220386762 Expired - Fee Related CN202812359U (en) | 2012-08-06 | 2012-08-06 | Pilot valve for relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202812359U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135018A (en) * | 2015-08-17 | 2015-12-09 | 成都国光电子仪表有限责任公司 | Pressure reducing valve for natural gas |
-
2012
- 2012-08-06 CN CN 201220386762 patent/CN202812359U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135018A (en) * | 2015-08-17 | 2015-12-09 | 成都国光电子仪表有限责任公司 | Pressure reducing valve for natural gas |
| CN105135018B (en) * | 2015-08-17 | 2017-11-03 | 成都国光电子仪表有限责任公司 | A kind of natural gas pressure-reducing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20130806 |