CN101749540A - Method for regulating front pressure of indirect acting type fuel gas pressure regulator - Google Patents
Method for regulating front pressure of indirect acting type fuel gas pressure regulator Download PDFInfo
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- CN101749540A CN101749540A CN200810207434A CN200810207434A CN101749540A CN 101749540 A CN101749540 A CN 101749540A CN 200810207434 A CN200810207434 A CN 200810207434A CN 200810207434 A CN200810207434 A CN 200810207434A CN 101749540 A CN101749540 A CN 101749540A
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Abstract
The invention discloses a method for regulating the front pressure of an indirect acting type fuel gas pressure regulator. The pressure regulator for realizing the method consists of a pressure regulating valve, a guide valve, a pre-regulating valve, a pressure switch and a throttle hole, and all elements are connected together through a pressure line. The method can control the open degree of the pressure regulating valve by obtaining a front pressure signal of the pressure regulator, and further ensure the stability of the front pressure of the pressure regulator. The largest characteristic of the method is to expand the using functions of an original back pressure regulator, thereby reducing the independent design of a front pressure regulator and reducing the production cost; meanwhile, the pressure regulator used in the method adopts the design of a module structure for realizing the on-line maintenance.
Description
Technical field
The present invention relates to a kind of gas transmission and distribution field that is applied to, be specifically related to a kind of method of regulating front pressure of indirect acting type fuel gas pressure regulator.
Background technique
Operation for urban pipe network, pressure stability in the pipe network is most important, yet owing to use the unstability of gas in the pipe network, usually causes the rising or the reduction of pipe network internal pressure, the pressure rising can cause potential safety hazard, and hypotony can cause user's usefulness gas undesired.Stable for guaranteeing pipe network operation, combustion gas operation department tends in the inner cover gas storage equipment that increases of urban pipe network, when the pipe network internal pressure raises, in gas storage equipment, inflate, in the gas replenishment process, must control flow of aerating air and be unlikely fluctuation to guarantee the pipe network internal pressure, this occasion certainly will need to press pressure governor before a kind of combustion gas, by obtaining keying that preceding pressure signal in the pipe network controls pressure governor, guarantee the stable of pipe network internal pressure to regulate inflation to caisson.
In the past, combustion gas operation department carried out the pressure controlled of pipe network by the method for artificial field control, and this way has that degree of regulation is poor, the human cost height, regulate nonsynchronous shortcoming.
Summary of the invention
In order to overcome the shortcoming of artificial pressure regulation, technical problem to be solved by this invention is the method that proposes a kind of regulating front pressure of indirect acting type fuel gas pressure regulator.This method realizes by following process:
When " upstream pressure " raises, open the valve port of big pressure regulator valve 1, increase discharges the flow of gas downstream, keeps preceding purpose of pressing thereby reach; When P1 increases, at first pressure switch 6 is opened, there is one air-flow to flow into the downstream through preset valve 8, pilot valve 7, throttle orifice 4, pressure switch 6 from the upstream, the effect of preset this moment valve 8 is to keep Pep-P2 constant substantially, and the pressure reduction Pep-Pm of pressure regulator valve 1 epithelium both sides depends on the aperture of pilot valve 7, and aperture is big, Pep-Pm reduces, and the aperture of pilot valve 7 depends on the P1 that acts in the pilot valve on the epithelium and the balance between spring, and P1 increases, and pilot valve 7 turns down; P1 increases, and pilot valve 7 turns down, and Pep-Pm increases, and modulating valve leaves greatly, thereby has suppressed the increase of P1, is about to P1 and is controlled in the narrow and small scope, has played the effect of pressing before regulating; The effect of pressure switch is to block the loaded pilot system stream when pressure regulator valve cuts out.
When " upstream pressure " reduces, turn down the valve port of pressure regulator valve 1, minimizing discharges the flow of gas downstream, thereby reaches the purpose of keeping inlet pressure; When P1 reduced, pilot valve 7 left greatly, and Pep-Pm reduces, and modulating valve turns down, and was controlled in the narrow and small scope thereby the reduction that has suppressed P1 is about to P1, had played the effect of pressing before regulating.
The present invention has expanded the function of use that pressure governor is pressed in original back, has reduced the independent design and the production cost of preceding pressure pressure governor, and pressure governor simultaneously of the present invention adopts the modular construction design can realize on-line maintenance.
Description of drawings
Fig. 1 is the principle schematic of regulating front pressure of indirect acting type fuel gas pressure regulator method of the present invention.
Symbol logo: 1 is pressure regulator valve; 2 is pressure inlet tube; 3 is pressure inlet tube; 4 is throttle orifice; 5 is pressure inlet tube; 6 is pressure switch; 7 is pilot valve; 8 are the preset valve; 9 is pressure inlet tube.
Embodiment
Below in conjunction with principle schematic, further set forth the present invention.
The principle schematic of a kind of regulating front pressure of indirect acting type fuel gas pressure regulator method that the present invention of being shown in Figure 1 proposes.In order to guarantee the stable of whole device " upstream pressure ", guarantee promptly that as shown in Figure 1 P1 is stable.When " upstream pressure " raises, open the valve port of big pressure regulator valve 1, increase discharges the flow of gas downstream, thereby reaches the purpose of keeping inlet pressure; When P1 increases, at first pressure switch 6 is opened, there is one air-flow to flow into the downstream through preset valve 8, pilot valve 7, throttle orifice 4, pressure switch 6 from the upstream, the effect of preset this moment valve 8 is to keep Pep-P2 constant substantially, and the pressure reduction Pep-Pm of pressure regulator valve 1 epithelium both sides depends on the aperture of pilot valve 7, and aperture is big, Pep-Pm reduces, and the aperture of pilot valve 7 depends on the P1 that acts in the pilot valve on the epithelium and the balance between spring, and P1 increases, and pilot valve 7 turns down; P1 increases, and pilot valve 7 turns down, and Pep-Pm increases, and modulating valve leaves greatly, is controlled in the narrow and small scope thereby the increase that has suppressed P1 is about to P1, has played the effect of pressure before regulating; The effect of pressure switch is to block the loaded pilot system stream when pressure regulator valve cuts out.
When " upstream pressure " reduces, turn down the valve port of pressure regulator valve 1, minimizing discharges the flow of gas downstream, thereby reaches the purpose of keeping inlet pressure; When P1 reduced, pilot valve 7 left greatly, and Pep-Pm reduces, and modulating valve turns down, and was controlled in the narrow and small scope thereby the reduction that has suppressed P1 is about to P1, had played the effect of pressing before regulating.
Each element interconnects by pressure inlet tube, and described each element is made up of pressure regulator valve 1, pilot valve 7, preset valve 8, pressure switch 6, throttle orifice 4, pressure inlet tube 2, pressure inlet tube 3, pressure inlet tube 5 and pressure inlet tube 9; Described pressure inlet tube 9 is connected with the epithelium epicoele of 8 imports of preset valve, pilot valve 7 and the epithelium cavity of resorption of pressure switch 6, and upstream pressure P1 causes the import of preset valve 8, the epithelium epicoele of pilot valve 7 and the epithelium cavity of resorption of pressure switch 6 by pressure inlet tube 9; Described pressure inlet tube 5 is connected with the outlet of pressure switch 6 and the epithelium epicoele of preset valve 7, and downstream pressure P2 causes the outlet of pressure switch 6 and the epithelium epicoele of preset valve 7 by pressure inlet tube 5; Described pressure inlet tube 2 is connected with outlet, the import of pilot valve 7, the pressure regulator valve 1 epithelium cavity of resorption of preset valve 8, and the inlet pressure Pep of the outlet pressure of preset valve 8 and pilot valve 7 causes pressure regulator valve 1 epithelium cavity of resorption by pressure inlet tube 2; Described pressure inlet tube 3 is connected with outlet, the import of pressure switch 6, the pressure regulator valve 1 epithelium epicoele of pilot valve 7, the outlet pressure Pm of pilot valve 7 acts on pressure regulator valve 1 epithelium epicoele by pressure inlet tube 3, pressure reduction Pep-Pm has determined the aperture of pressure regulator valve, is provided with throttle orifice 4 between the import of the outlet of pilot valve 7 and pressure switch 6.The preset valve guarantees that Pep-P2 is constant.The effect of pressure switch is to close the loaded pilot system stream when pressure regulator valve cuts out.
Claims (3)
1. the method for a regulating front pressure of indirect acting type fuel gas pressure regulator is characterized in that, implementation procedure is as follows:
When " upstream pressure " raises, open the valve port of big pressure regulator valve [1], increase discharges the flow of gas downstream, keeps preceding purpose of pressing thereby reach; When P1 increases, at first pressure switch [6] is opened, there is one air-flow to flow into the downstream through preset valve [8], pilot valve [7], throttle orifice [4], pressure switch [6] from the upstream, the effect of preset valve this moment [8] is to keep Pep-P2 constant substantially, and the pressure reduction Pep-Pm of pressure regulator valve [1] epithelium both sides depends on the aperture of pilot valve [7], and aperture is big, Pep-Pm reduces, and the aperture of pilot valve [7] depends on the P1 that acts in the pilot valve on the epithelium and the balance between spring, and P1 increases, and pilot valve [7] turns down;
P1 increases, and pilot valve [7] turns down, and Pep-Pm increases, and modulating valve leaves greatly, thereby has suppressed the increase of P1, is about to P1 and is controlled in the narrow and small scope, has played the effect of pressing before regulating; The effect of pressure switch is when pressure regulator valve cuts out, and blocks the loaded pilot system stream.
When " upstream pressure " reduces, turn down the valve port of pressure regulator valve [1], minimizing discharges the flow of gas downstream, keeps preceding purpose of pressing thereby reach; When P1 reduced, pilot valve 7 left greatly, and Pep-Pm reduces, and modulating valve turns down, and was controlled in the narrow and small scope thereby the reduction that has suppressed P1 is about to P1, had played the effect of pressing before regulating.
2. the method for a kind of regulating front pressure of indirect acting type fuel gas pressure regulator according to claim 1, it is characterized in that, said method interconnects realization by pressure inlet tube and each element, and described each element is made up of pressure regulator valve [1], pilot valve [7], preset valve [8], pressure switch [6], throttle orifice [4], pressure inlet tube [2], pressure inlet tube [3], pressure inlet tube [5] and pressure inlet tube [9]; Described pressure inlet tube [9] is connected with the epithelium epicoele of preset valve [8] import, pilot valve [7] and the epithelium cavity of resorption of pressure switch [6], and upstream pressure P1 causes the import of preset valve [8], the epithelium epicoele of pilot valve [7] and the epithelium cavity of resorption of pressure switch [6] by pressure inlet tube [9]; Described pressure inlet tube [5] is connected with the outlet of pressure switch [6] and the epithelium epicoele of preset valve [7], and downstream pressure P2 causes the outlet of pressure switch [6] and the epithelium epicoele of preset valve [7] by pressure inlet tube [5]; Described pressure inlet tube [2] is connected with outlet, the import of pilot valve [7], pressure regulator valve [1] the epithelium cavity of resorption of preset valve [8], and the inlet pressure Pep of the outlet pressure of preset valve [8] and pilot valve [7] causes pressure regulator valve [1] epithelium cavity of resorption by pressure inlet tube [2]; Described pressure inlet tube [3] is connected with outlet, the import of pressure switch [6], pressure regulator valve [1] the epithelium epicoele of pilot valve [7], the outlet pressure Pm of pilot valve [7] acts on pressure regulator valve [1] epithelium epicoele by pressure inlet tube [3], pressure reduction Pep-Pm has determined the aperture of pressure regulator valve, is provided with throttle orifice [4] between the import of the outlet of pilot valve [7] and pressure switch [6].
3. the method for a kind of regulating front pressure of indirect acting type fuel gas pressure regulator according to claim 1 is characterized in that, above-mentioned pressure regulator valve [1] is the pressure regulator valve open in usual that lost efficacy, and pilot valve [7] is the pilot valve open in usual that lost efficacy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810207434.3A CN101749540B (en) | 2008-12-19 | 2008-12-19 | Method for regulating front pressure of indirect acting type fuel gas pressure regulator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810207434.3A CN101749540B (en) | 2008-12-19 | 2008-12-19 | Method for regulating front pressure of indirect acting type fuel gas pressure regulator |
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| Publication Number | Publication Date |
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| CN101749540A true CN101749540A (en) | 2010-06-23 |
| CN101749540B CN101749540B (en) | 2014-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810207434.3A Active CN101749540B (en) | 2008-12-19 | 2008-12-19 | Method for regulating front pressure of indirect acting type fuel gas pressure regulator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537665A (en) * | 2011-12-23 | 2012-07-04 | 上海飞奥燃气设备有限公司 | Device and method for regulating outlet pressure of indirect effect type gas pressure regulator along with clock |
| CN103336512A (en) * | 2013-06-29 | 2013-10-02 | 上海飞奥燃气设备有限公司 | Fuel gas transporting and distributing intelligent managing device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2035504U (en) * | 1988-05-18 | 1989-04-05 | 谢伟光 | Combined pressure adjuster for gas pressure adjuster and shunt pore plate |
| US5097858A (en) * | 1990-05-01 | 1992-03-24 | Zlokovitz Robert J | Clock controlled gas pressure regulator |
| CN2199167Y (en) * | 1994-03-03 | 1995-05-31 | 张郡 | Positive pressure sample-conveying stepless auto-control speed-regulating gas supply device |
| CN1400416A (en) * | 2001-07-31 | 2003-03-05 | 天津华燊燃气实业有限公司 | Multi-stage jet tube pressure regulating method for compressed natural gas and its equipment |
-
2008
- 2008-12-19 CN CN200810207434.3A patent/CN101749540B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2035504U (en) * | 1988-05-18 | 1989-04-05 | 谢伟光 | Combined pressure adjuster for gas pressure adjuster and shunt pore plate |
| US5097858A (en) * | 1990-05-01 | 1992-03-24 | Zlokovitz Robert J | Clock controlled gas pressure regulator |
| CN2199167Y (en) * | 1994-03-03 | 1995-05-31 | 张郡 | Positive pressure sample-conveying stepless auto-control speed-regulating gas supply device |
| CN1400416A (en) * | 2001-07-31 | 2003-03-05 | 天津华燊燃气实业有限公司 | Multi-stage jet tube pressure regulating method for compressed natural gas and its equipment |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537665A (en) * | 2011-12-23 | 2012-07-04 | 上海飞奥燃气设备有限公司 | Device and method for regulating outlet pressure of indirect effect type gas pressure regulator along with clock |
| CN102537665B (en) * | 2011-12-23 | 2014-08-13 | 上海飞奥燃气设备有限公司 | Device and method for regulating outlet pressure of indirect effect type gas pressure regulator along with clock |
| CN103336512A (en) * | 2013-06-29 | 2013-10-02 | 上海飞奥燃气设备有限公司 | Fuel gas transporting and distributing intelligent managing device |
| CN103336512B (en) * | 2013-06-29 | 2015-12-02 | 上海飞奥燃气设备有限公司 | Gas transmission and distribution intelligent management apapratus |
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| Publication number | Publication date |
|---|---|
| CN101749540B (en) | 2014-02-26 |
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