CN201318551Y - Indirect acting type gas pressure regulator used for adjusting forward pressure - Google Patents
Indirect acting type gas pressure regulator used for adjusting forward pressure Download PDFInfo
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- CN201318551Y CN201318551Y CNU2008201574836U CN200820157483U CN201318551Y CN 201318551 Y CN201318551 Y CN 201318551Y CN U2008201574836 U CNU2008201574836 U CN U2008201574836U CN 200820157483 U CN200820157483 U CN 200820157483U CN 201318551 Y CN201318551 Y CN 201318551Y
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- pressure
- valve
- inlet tube
- outlet
- pilot valve
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Abstract
The utility model discloses an indirect acting type gas pressure regulator used for adjusting forward pressure. The pressure regulator consisting of a pressure regulating valve, a pilot valve, a pre-regulating valve, a pressure switch and an orifice; each element is connected by joining pipes; the upstream pressures are guided into the inlet of the pre-regulating valve, the upper cavity of the involucra of the pilot valve, and the lower cavity of the involucra of the pressure switch by the jointing pipes. The downstream pressures are guided into the outlet of the pre-regulating valve and the upper cavity of the involucra of the pre-regulating valve by the joining pipes; the outlet (namely the inlet of the pilot valve) pressures Pep of the pre-regulating valve are guided into one side of the involucra of the pressure regulating valve by the joining pipes; the outlet pressures Pm of the pilot valve are acted on the other side of the involucra of the pressure regulating valve by the joining pipes; the pressure difference (Pep minus Pm) decides the openness of the pressure regulating valve. The orifice is arranged between the outlet of the pilot valve and the inlet of the pressure switch. The effect of the pre-regulating valve is to ensure the pressure difference (Pep minus Pm) to be basically unchanged. The indirect acting type gas pressure regulator used for adjusting forward pressure controls the openness of the pressure regulating valve by obtaining the forward pressure signal of the pressure regulator, thereby ensuring the stability of the forward pressure of the pressure regulator.
Description
Technical field
The utility model relates to a kind of gas transmission and distribution field that is applied to, and is specifically related to a kind of preceding indirect acting type fuel gas pressure governor of pressing that is used to regulate.
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 pressure signal (preceding pressure) 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.
The model utility content
In order to overcome the shortcoming of artificial pressure regulation, but technical problem to be solved in the utility model is to propose the indirect acting type fuel gas pressure governor of pressing before a kind of real-time regulated.
This pressure governor is by 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 etc., each element couples together by pressure inlet tube, 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.
Maximum characteristics of the present invention have been expanded the function of use that pressure governor is pressed in original back, have 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 a structural representation of the present utility model.
Wherein: 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 accompanying drawing, further set forth the utility model.
As shown in Figure 1, a kind of indirect acting type fuel gas pressure governor that is used to regulate preceding pressure that the utility model proposes 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 etc.
Each element couples together by pressure inlet tube, 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.
Specify course of action of the present utility model below in conjunction with accompanying drawing.
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 inlet pressure reduces, turn down the valve port of pressure regulator valve 1, thereby reach the purpose of keeping inlet pressure.And the aperture of pressure regulator valve 1 is by the pressure reduction Pep-Pm control of pressure regulator valve 1 epithelium both sides.
When P1 hour, pressure regulator valve cuts out, the pilot valve standard-sized sheet, pressure switch is closed.
When P1 increased, at first pressure switch was opened, and had one air-flow to flow into the downstream from the upstream through preset valve 8, pilot valve 7, throttle orifice 4, pressure switch 6.
The effect of preset this moment valve 8 is to keep Pep-P2 constant substantially.
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, and 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.
So P1 increases, 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.
Otherwise P1 reduces, and pilot valve 7 leaves greatly, and Pep-Pm reduces, and modulating valve turns down even cuts out, thus suppressed P1 reduce soon that P1 is controlled in the narrow and small scope, 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.
Claims (2)
1, a kind of indirect acting type fuel gas pressure governor that is used to regulate preceding pressure, it is characterized in that, press pressure governor to form before this indirect acting type by 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].
2, a kind of preceding indirect acting type fuel gas pressure governor of pressing that is used to regulate 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 inefficacy pilot valve open in usual.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201574836U CN201318551Y (en) | 2008-12-19 | 2008-12-19 | Indirect acting type gas pressure regulator used for adjusting forward pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201574836U CN201318551Y (en) | 2008-12-19 | 2008-12-19 | Indirect acting type gas pressure regulator used for adjusting forward pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201318551Y true CN201318551Y (en) | 2009-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201574836U Expired - Lifetime CN201318551Y (en) | 2008-12-19 | 2008-12-19 | Indirect acting type gas pressure regulator used for adjusting forward pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201318551Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103958956A (en) * | 2012-11-20 | 2014-07-30 | 釜山城市燃气有限公司 | Portable gas pressure testing device and testing method using same |
-
2008
- 2008-12-19 CN CNU2008201574836U patent/CN201318551Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103958956A (en) * | 2012-11-20 | 2014-07-30 | 釜山城市燃气有限公司 | Portable gas pressure testing device and testing method using same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090930 |
|
| CX01 | Expiry of patent term |