CN102519662A - Set pressure measuring system and method for pressure sensing control valves - Google Patents
Set pressure measuring system and method for pressure sensing control valves Download PDFInfo
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- CN102519662A CN102519662A CN2011104557966A CN201110455796A CN102519662A CN 102519662 A CN102519662 A CN 102519662A CN 2011104557966 A CN2011104557966 A CN 2011104557966A CN 201110455796 A CN201110455796 A CN 201110455796A CN 102519662 A CN102519662 A CN 102519662A
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- pressure
- control chamber
- operation valve
- sensitive operation
- orifice plate
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Abstract
The invention relates to a set pressure measuring system and a method for pressure sensing control valves. The set pressure measuring system comprises a fluid pressure source, a stop valve, a throttle orifice plate, a pressure sensor and an acquisition system. An outlet of the fluid pressure source is connected with the stop valve, the stop valve controls the throttle orifice plate to lead fluid to be injected into a control cavity of the pressure sensing control valve, and the pressure sensor is arranged in the control cavity, and the acquisition system acquires pressure data of the pressure sensor. The set pressure measuring system and the method for pressure sensing control valves solve the technical problems that existing set pressure measuring methods for existing pressure sensing control valves are high in affection of human factors and high in measurement error, can realize accurate measurement of set pressure of the pressure sensing control valves and removes error caused when readings of pressure gauges are read manually, and accordingly measurement precision can be improved greatly.
Description
Technical field
The present invention relates to a kind of assay method by the pressure-sensitive operation valve set pressure of hydrodynamic pressure control action.
Background technology
In pipeline and industrial system, there is one type of valve to need control its action by hydrodynamic pressure, promptly hydrodynamic pressure reaches pre-set force value valve auto-action when (this pressure is called set pressure), this type valve is called the pressure-sensitive operation valve here.The pressure-sensitive operation valve adopts piston type or similar structures usually, and promptly fluid control pressure acts on an end of piston, and the other end is by loadings such as springs, and piston moves and drives spool and moves the switch or the switching-over of realization operation valve when pressure reaches set pressure.The pressure-sensitive operation valve is controlled a main valve as pilot valve usually and is carried out operations (like pilot-operated type blowdown valve, pilot operated safety valve etc.) such as pressure release or programmed control; Because safety or system flow need, the set pressure of pressure-sensitive operation valve is accurately control and regularly on-line calibration often.
Existing pressure-sensitive operation valve set pressure is measured or calibration steps; Be the pressure that slow feeding is increased gradually to the control chamber of pressure-sensitive operation valve; As adopt the wobble pump supercharging, and confirm setup pressure value through the action situation of observing manometric reading situation that links to each other with control chamber or the main valve of being controlled, this set pressure measuring method human factor influence is bigger; Measuring error is big, possibly cause fault to system.
Summary of the invention
In order to solve the technical matters that existing pressure-sensitive operation valve set pressure assay method human factor influence is big, measuring error is big, the present invention provides a kind of set pressure of pressure-sensitive operation valve to measure system and method.
Technical solution of the present invention is:
A kind of set pressure of pressure-sensitive operation valve is measured system; Its special character is: comprise fluid pressure source 4, stop valve 5, throttling orifice plate 6 and pressure transducer and acquisition system; The outlet of said fluid pressure source is connected with stop valve; Said stop valve injects fluid for the control chamber of pressure-sensitive operation valve through the control throttling orifice plate, and said pressure transducer is arranged in the control chamber, said acquisition system gather pressure transducer pressure data.
A kind of set pressure assay method of pressure-sensitive operation valve, its special character is: may further comprise the steps:
1] build measuring system,
One throttling orifice plate is set before the control chamber of pressure-sensitive operation valve, applies hydrodynamic pressure for the control chamber of pressure-sensitive operation valve through throttling orifice plate by stop valve control,
2] guarantee that the hydrodynamic pressure before the throttling orifice plate should be higher than the set pressure certain amplitude,
3] with the control chamber pressure of pressure transducer high speed acquisition pressure-sensitive operation valve, then with the control chamber pressure of gathering to the time differentiate; Continuous collecting is to the time differentiate,
4] the pairing pressure-sensitive cavity pressure in position that its derivative suddenlys change in the pressure-sensitive cavity pressure uphill process is the set pressure of pressure-sensitive operation valve.
The advantage that the present invention had:
The present invention compared with prior art can accurately measure the set pressure of pressure-sensitive operation valve, because the adopts pressure sensor image data has been got rid of the error that the people causes for the interpretation pressure gauge reading, can improve the mensuration precision greatly.
Description of drawings
Fig. 1 is the systematic schematic diagram to the assay method of the set pressure of pressure-sensitive operation valve.
Fig. 2 is a set pressure interpretation schematic diagram.
Reference numeral: 1-pressure-sensitive operation valve, 2-piston, 3-control chamber, 4-fluid pressure source, 5-stop valve, 6-throttling orifice plate, 7-pressure transducer.
Embodiment
Fig. 1 is the systematic schematic diagram of this assay method; Stop valve 5 may command fluid pressure sources 4 (pressure should be higher than set pressure); Control chamber 3 through 6 pairs of pressure-sensitive operation valves 1 of throttling orifice plate carries out supercharging; By the pressure transducer that links to each other with control chamber 3 and acquisition system (not shown) the pressure of pressurization control chamber is carried out high speed acquisition, can adopt integrated data processing system or computing machine to carry out online or the off-line differentiate is handled and interpretation provides setup pressure value (the pairing control chamber pressure of piston 2 motions of pressure-sensitive operation valve 1).Fig. 2 signal has provided control chamber pressure p, the curve of pressure derivative dp/dt and the interpretation method of set pressure ps.According to the diameter of control chamber piston, can adjust the climbing speed of control chamber pressure through the aperture of adjustment throttling orifice plate, thereby the interpretation that makes set pressure ps more accurately and reliably.
The present invention provides a kind of assay method of set pressure of pressure-sensitive operation valve.One throttling orifice plate is set before the control chamber of pressure-sensitive operation valve; Before throttling orifice plate, apply the hydrodynamic pressure that is higher than set pressure through moment; Use the control chamber pressure of pressure transducer high speed acquisition pressure-sensitive operation valve simultaneously; Then with the control chamber pressure of gathering to the time differentiate, the pairing pressure-sensitive cavity pressure in position of its derivative sudden change is the set pressure of pressure-sensitive operation valve in the control chamber pressure uphill process.
A throttling orifice plate that before the control chamber of pressure-sensitive operation valve, is provided with, the size of this throttling orifice plate are confirmed according to the area of control chamber piston, to guarantee the pumping rate of pressure in the control chamber.Apply hydrodynamic pressure for the control chamber of pressure-sensitive operation valve by stop valve control through throttling orifice plate, the hydrodynamic pressure before the throttling orifice plate should be higher than the set pressure certain amplitude.Use the control chamber pressure of pressure transducer high speed acquisition pressure-sensitive operation valve simultaneously; Then with the control chamber pressure of gathering to the time differentiate, the pairing pressure-sensitive cavity pressure in position of its derivative sudden change is the set pressure of pressure-sensitive operation valve in the pressure-sensitive cavity pressure uphill process.
Principle of the present invention is: when applying in the hydrodynamic pressure pressurization for a cavity volume; When the volume of cavity volume changed (piston moves and causes) suddenly, marked change will take place in the rate of pressurization of the pressure in the cavity volume, as long as the additional speed of control fluid; And to this pressure to the time differentiate; Can find out the moment of pressure jump at an easy rate, also be that piston moves constantly, and this moment, corresponding control chamber pressure was set pressure.
Claims (2)
1. the set pressure of a pressure-sensitive operation valve is measured system; It is characterized in that: comprise fluid pressure source (4), stop valve (5), throttling orifice plate (6) and pressure transducer and acquisition system; The outlet of said fluid pressure source is connected with stop valve; Said stop valve injects fluid for the control chamber of pressure-sensitive operation valve through the control throttling orifice plate, and said pressure transducer is arranged in the control chamber, said acquisition system gather pressure transducer pressure data.
2. the set pressure assay method of a pressure-sensitive operation valve is characterized in that: may further comprise the steps:
1] build measuring system,
One throttling orifice plate is set before the control chamber of pressure-sensitive operation valve, applies hydrodynamic pressure for the control chamber of pressure-sensitive operation valve through throttling orifice plate by stop valve control,
2] guarantee that the hydrodynamic pressure before the throttling orifice plate should be higher than the set pressure certain amplitude,
3] with the control chamber pressure of pressure transducer high speed acquisition pressure-sensitive operation valve, then with the control chamber pressure of gathering to the time differentiate; Continuous collecting is to the time differentiate,
4] the pairing pressure-sensitive cavity pressure in position that its derivative suddenlys change in the pressure-sensitive cavity pressure uphill process is the set pressure of pressure-sensitive operation valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104557966A CN102519662A (en) | 2011-12-23 | 2011-12-23 | Set pressure measuring system and method for pressure sensing control valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104557966A CN102519662A (en) | 2011-12-23 | 2011-12-23 | Set pressure measuring system and method for pressure sensing control valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102519662A true CN102519662A (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011104557966A Pending CN102519662A (en) | 2011-12-23 | 2011-12-23 | Set pressure measuring system and method for pressure sensing control valves |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4527415A (en) * | 1982-11-10 | 1985-07-09 | Electricite De France (Service National) | Apparatus for checking the set pressure of a safety valve |
| CN2035504U (en) * | 1988-05-18 | 1989-04-05 | 谢伟光 | Combined pressure adjuster for gas pressure adjuster and shunt pore plate |
| CN2069952U (en) * | 1990-07-02 | 1991-01-23 | 付晶业 | Orifice plate valve |
| CN200978999Y (en) * | 2006-12-15 | 2007-11-21 | 曲毅 | Chemical container safety valve on-line detecting instrument |
| WO2010058880A1 (en) * | 2008-11-24 | 2010-05-27 | Korea Hydro & Nuclear Power Co., Ltd. | Test apparatus and method for safety valve |
| CN202393548U (en) * | 2011-12-23 | 2012-08-22 | 西安航天动力研究所 | Set pressure measuring system for pressure sensing control valve |
-
2011
- 2011-12-23 CN CN2011104557966A patent/CN102519662A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4527415A (en) * | 1982-11-10 | 1985-07-09 | Electricite De France (Service National) | Apparatus for checking the set pressure of a safety valve |
| CN2035504U (en) * | 1988-05-18 | 1989-04-05 | 谢伟光 | Combined pressure adjuster for gas pressure adjuster and shunt pore plate |
| CN2069952U (en) * | 1990-07-02 | 1991-01-23 | 付晶业 | Orifice plate valve |
| CN200978999Y (en) * | 2006-12-15 | 2007-11-21 | 曲毅 | Chemical container safety valve on-line detecting instrument |
| WO2010058880A1 (en) * | 2008-11-24 | 2010-05-27 | Korea Hydro & Nuclear Power Co., Ltd. | Test apparatus and method for safety valve |
| CN202393548U (en) * | 2011-12-23 | 2012-08-22 | 西安航天动力研究所 | Set pressure measuring system for pressure sensing control valve |
Non-Patent Citations (2)
| Title |
|---|
| 周一卉，刘润杰，由宏新: "微机测控安全阀校验过程中整定压力的判定原则", 《化工装备技术》, vol. 25, no. 6, 30 December 2004 (2004-12-30) * |
| 毕树明，周一卉等: "安全阀在线检测装置研制", 《化工科技市场》, no. 7, 31 July 2003 (2003-07-31) * |
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Application publication date: 20120627 |