CN203604735U - Gas pressure-reducing valve used for nuclear power - Google Patents
Gas pressure-reducing valve used for nuclear power Download PDFInfo
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- CN203604735U CN203604735U CN201320525250.8U CN201320525250U CN203604735U CN 203604735 U CN203604735 U CN 203604735U CN 201320525250 U CN201320525250 U CN 201320525250U CN 203604735 U CN203604735 U CN 203604735U
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- valve
- piston
- pressure
- pilot valve
- nuclear power
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Abstract
The utility model relates to a gas pressure-reducing valve used for nuclear power. The gas pressure-reducing valve is characterized in that: a piston cylinder sleeve is arranged in a valve body; a piston matched with the piston cylinder sleeve is arranged in the piston cylinder sleeve; a valve rod is arranged below the piston; a guide valve is arranged outside the valve body; and pressure gages are arranged on the guide valve. The gas pressure-reducing valve used for nuclear power has following beneficial effects: pressure adjustment of a main valve is achieved in such a manner that opening degree of the guide valve is controlled and opening degree of the main valve is further controlled due to comparison made between feedback pressure of downstream gas and compression elastic force of a spring above the guide valve; by use of a local pressure controlling mode of an externally-arranged small pipeline, forces acting on parts are weak; therefore the guide valve adopting a small-dimension and low-strength spring structure is used for controlling local pressure so that variation of pressure is more smoother with minor fluctuation and the defect of a large fluctuation range of direct pressure regulation carried out by a large-dimensional pressure-regulating spring is further avoided; and multi-screw pitch adjustment is adopted by a guide valve screw rod, which contributes to subtle and uniform feeding amount and higher adjusting precision.
Description
Technical field
The utility model relates to the technical field of pipeline valve, specifically a kind of nuclear power gas pressure reducer.
Background technique
In gas pipeline system, decompressor is generally straight moving diaphragm type or piston reduction valve at present.The direct pressure regulation of large scale pressure adjusting spring for this class reduction valve, spring rate is large, and when changes in flow rate, delivery pressure fluctuation is also larger, and the degree of regulation of valve is lower, and the physical dimension of valve also will increase.Consider in addition fast tens times of the velocity ratio water velocity of gas, can make the too early wearing and tearing of common elastomer diaphragm or O type circle and aging, reduce the working life of product, swiftly flowing gas simultaneously, also can make oiling agent dry very soon, may increase the surface friction drag of piston, reduce the usability of product.
Summary of the invention
The purpose of this utility model is to provide a kind of improved nuclear power gas pressure reducer, and it can overcome in prior art the shortcomings such as reduction valve decompression is unstable, and degree of regulation is not high, and elastomer diaphragm and ring wear are aging fast, and working life is low.
To achieve these goals, the technical solution of the utility model is: a kind of nuclear power gas pressure reducer, it mainly comprises valve body, with the valve gap being connected with valve body, it is characterized in that: in valve body, establish piston-cylinder, be provided with the piston matching with piston-cylinder in piston-cylinder, piston below is provided with valve rod, valve body is outside equipped with pilot valve, and pressure gauge is installed on pilot valve.
When use, this new device contrasts by the feedback pressure of gas downstream and the compression elasticity of pilot valve top spring, controls the aperture of pilot valve, and then controls the aperture of main valve, and the pressure of realizing main valve regulates.Owing to adopting the control mode of external tiny pipeline local compression, the suffered active force of parts is relatively little, therefore adopt the pilot valve of small size, low rigid spring structure to control local compression, pressure changes more steady, wave properties is less, thereby avoid the direct pressure regulation of employing large scale pressure adjusting spring, the shortcoming that wave range is large.Pilot valve screw rod adopts many pitch regulated simultaneously, amount of feed fine and even, and degree of regulation is higher.Valve body control chamber adopts piston-ring packing, and piston ring is highi degree of accuracy high-abrasive material, and main valve clack adopts polytetrafluoroethylsealed sealed, airflow direction low in and high out, diaphragm of rubber compared to existing technology or rubber o-ring, more can adapt to the requirement of gas flow rate and temperature, and be greatly improved the working life of valve.By the enforcement of above technology, improve the usability of valve, increase the working life of valve, expand the application area of valve, there is compared to existing technology remarkable progress.
Accompanying drawing explanation
Fig. 1 is the utility model one embodiment's structural representation.
Embodiment:
Below in conjunction with drawings and Examples, the utility model will be further described.
The mark that in accompanying drawing, each label represents is as follows: 1 bottom, 2 valve bodies, 3 Returnning springs, 4 flaps, 5 valve rods, 6 piston-cylinders, 7 pistons, 8 piston rings, 9 valve gaps, 10 copper pipes, 11 decompression pilot valves, 12 pressure gauges.
A kind of nuclear power gas pressure reducer described in the utility model, it mainly comprises valve body, with the valve gap being connected with valve body, it is characterized in that: in valve body, establish piston-cylinder, in piston-cylinder, be provided with the piston matching with piston-cylinder, piston below is provided with valve rod, and valve body is outside equipped with pilot valve, and pressure gauge is installed on pilot valve.Stem lower portion is connected with flap, and flap below is arranged with Returnning spring, and valve body bottom is provided with bottom, and Returnning spring is between bottom and flap.The external diameter of piston is inlaid with piston ring, and described piston ring matches with piston-cylinder, and piston ring adopts high-silicon abrasion resistant alloy piston ring.
Valve body two ends are respectively equipped with flange, are respectively equipped with inlet/outlet pressure feedback hole on flange, and described inlet/outlet pressure feedback hole is connected with pilot valve by inlet/outlet pressure tube and pipe joint respectively, and pilot valve is fixed in valve gap top by pipe joint.Described pilot valve is decompression pilot valve, and pilot valve is provided with two pressure gauges, communicates respectively with inlet/outlet pressure piping.
In implementation process, gas is flowed into by valve body 2 entrance points, import decompression pilot valve 11 into through flange pressure feedback hole and copper pipe 10, regulate through the trace of pilot valve 11, enter the epicoele of valve body piston 7, under the effect of epicoele gas pressure, piston 7 promotes valve rod 5 and flap 4, overcomes the resistance of cavity of resorption air pressure and Returnning spring 3, moves down and opens flap 3, gas flows to outlet by flap below, and pipeline is connected air feed.By regulating pilot valve 11 adjusting bolts, can accurately control the size of epicoele suction pressure, and then control the aperture of flap 3, thereby the required outlet pressure setting value of the system that obtains realizes the voltage regulation function of reduction valve.
In the time of gas downstream pressure surge, its changing value is by valve body 2 flange outlet pressure feedback pipes 10, pass to pilot valve 11, with pilot valve 11 contained springs carry out pressure ratio after, automatically control the air inlet aperture of pilot valve 11, and then affect the force value of piston 7 epicoeles, flap 4 apertures are followed variation, the fluctuation of counteracting outlet pressure, recovers setting value, realizes the voltage stabilizing function of reduction valve.
The Leading valve that pilot valve 11 is reduction valve, there is pressure and change enlarging function, pilot valve screw rod adopts many pitch regulated simultaneously, amount of feed fine and even, and degree of regulation is higher, and then the pressure that has influence on main valve 2 epicoele large spaces changes, thereby realize voltage-regulation voltage-stabilization function, the spring direct-acting type main valve of comparing large scale, high rigidity regulates, and degree of regulation is higher, more convenient operation, finished product is also more economical.
Main valve control chamber is seal structure for piston ring, is made up of piston cylinder 6, piston 7, piston ring 8, and piston ring 8, for high silicon cast iron NC super machining forms, is embedded on piston 7, combines with piston cylinder 6, forms sealing pair.And the intake method of air-flow adopts the mode of low in and high out.These structures can adapt to the operating mode of gas medium high-speed and high-temperature, have avoided the problem of the rubber parts such as membrane configuration, O type circle and the too early wear and aging of main valve clack, the working life of greatly having improved reduction valve.
Claims (4)
1. a nuclear power gas pressure reducer, it mainly comprises valve body, with the valve gap being connected with valve body, it is characterized in that: in valve body, establish piston-cylinder, in piston-cylinder, be provided with the piston matching with piston-cylinder, piston below is provided with valve rod, valve body is outside equipped with pilot valve, and pressure gauge is installed on pilot valve, and pilot valve screw rod adopts many pitch regulated, stem lower portion is connected with flap, flap below is arranged with Returnning spring, and valve body bottom is provided with bottom, and Returnning spring is between bottom and flap, flap adopts polytetrafluoroethylsealed sealed, airflow direction low in and high out.
2. a kind of nuclear power gas pressure reducer according to claim 1, is characterized in that: the external diameter of piston is inlaid with piston ring, and described piston ring matches with piston-cylinder, and piston ring adopts high-silicon abrasion resistant alloy piston ring.
3. a kind of nuclear power gas pressure reducer according to claim 1, it is characterized in that: valve body two ends are respectively equipped with flange, on flange, be respectively equipped with inlet/outlet pressure feedback hole, described inlet/outlet pressure feedback hole is connected with pilot valve by inlet/outlet pressure tube and pipe joint respectively, and pilot valve is fixed in valve gap top by pipe joint.
4. a kind of nuclear power gas pressure reducer according to claim 3, is characterized in that: described pilot valve is decompression pilot valve, and pilot valve is provided with two pressure gauges, communicates respectively with inlet/outlet pressure piping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320525250.8U CN203604735U (en) | 2013-08-27 | 2013-08-27 | Gas pressure-reducing valve used for nuclear power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320525250.8U CN203604735U (en) | 2013-08-27 | 2013-08-27 | Gas pressure-reducing valve used for nuclear power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203604735U true CN203604735U (en) | 2014-05-21 |
Family
ID=50717410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320525250.8U Expired - Lifetime CN203604735U (en) | 2013-08-27 | 2013-08-27 | Gas pressure-reducing valve used for nuclear power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203604735U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355574A (en) * | 2017-03-09 | 2017-11-17 | 刘星 | A kind of oxygen pressure reducing valve |
-
2013
- 2013-08-27 CN CN201320525250.8U patent/CN203604735U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355574A (en) * | 2017-03-09 | 2017-11-17 | 刘星 | A kind of oxygen pressure reducing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 201799 No. 199 Qing Road, Shanghai Industrial Zone, Qingpu Patentee after: SHANGHAI IVCO VALVE CO.,LTD. Address before: 201706 Shanghai city Qingpu district Song Ying Road No. 1205 Patentee before: SHANGHAI AIWEIKE VALVE MANUFACTURING Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140521 |
|
| CX01 | Expiry of patent term |