CN104482279B - Under-voltage auto-closing pressure regulator after valve - Google Patents
Under-voltage auto-closing pressure regulator after valve Download PDFInfo
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- CN104482279B CN104482279B CN201410760111.2A CN201410760111A CN104482279B CN 104482279 B CN104482279 B CN 104482279B CN 201410760111 A CN201410760111 A CN 201410760111A CN 104482279 B CN104482279 B CN 104482279B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/1262—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being spring loaded
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses under-voltage auto-closing pressure regulator after a kind of valve, it mainly by main valve, be fitted to the homophony bellows of main valve, pressure regulation pilot valve ZH and be installed on the rear pressure controller HK of pressure regulation pilot valve ZH inlet end and constitute.It is to act on rear pressuring film plate in pressure controller HK after line pressure downstream importing, can control to input the pressure regulation source of the gas signal of pressure regulation pilot valve.When downstream pressure is higher than when setting under-voltage value, pressure regulation pilot valve can obtain signal source of the gas and main valve is carried out pressure regulation operation, when downstream pressure as little as sets under-voltage value, it automatically can close after pressure controller shutoff signal source of the gas, make pressure regulator pressure out of hand close main valve, thoroughly eliminate potential safety hazard during downstream line maintenance activity and guarantee downstream user gas safety.The present invention has the outstanding advantages that the simple and direct production cost of structure is low, easy to install, stable, long working life, security performance are high really, has splendid application prospect in gas transmission industry.
Description
Technical field
The present invention relates to under-voltage auto-closing pressure regulator after a kind of valve, belong to the technical field of gas line network pressure regulation safety protection device, it is particularly suitable for installing and using on the gas pipelines such as natural gas, liquefied petroleum gas, coal gas and CNG voltage regulating station, has obvious technique effect to improving gas line network security performance.
Background technology
For city gas transmission network, it is by special dispensing device and to spread all over the huge piping control engineering that the gas line network in urban district is constituted, and its task is through the link such as pressure regulation, allotment, outer air supply source to be carried out lowering and stabilizing blood pressure technical finesse realize supplying the purpose of safe handling to the combustion gas that numerous user's discharge pressures are stable.But, pressure of gas line network can be caused to produce bigger fluctuation by multifactorial impacts of storage such as air source quality, geographical environment and weather conditions owing to gas line network equipment is in operation simultaneously, this not only can affect gas transmission quality, also can be brought serious potential safety hazard with gas facility.Existing gas company is mostly utilized on gas transmission line equipped voltage regulator device, and the pressure stability of gas line network can be regulated and controled allowing in the range of fluctuation by it.The present inventor once proposed the patented technology of a kind of entitled " ultra-high voltage indirect action type voltage-regulating device " (ZL200820063920.8) on June 24th, 2008, the indirect-action type pressure regulator product manufactured according to this technical scheme is used widely on the gas line network in a lot of cities, for guaranteeing that gas company's gas line network equipment stable operation and user's gas have played safely certain effect.Its basic structure and operation principle be: the pilot valve that it is connected by the main valve and signal pipe being installed on gas transmission line forms, in the Pressure Fluctuation Signal of gas line network is imported pilot valve and act on voltage regulation diaphragm and make it move up and down with pressure oscillation to change throttle opening, in the bellows of main valve, press negative feedback mode input pressure regulation signal, output pressure can be regulated in time by the open degree of regulation main valve, guarantee that the combustion gas to user's output pressure is stable supplies safe handling.We long campaigns pressure regulator product R&D and production work in it has also been found that: although existing indirect-action type pressure regulator product has good pressure regulation effect, but without dareing not or would not speak up, it still suffers from some in actual motion and uses defect, when it mainly shows themselves in that when downstream tube net hypotony or " booster decompression " extreme phenomenon occurs, it can not be automatically switched off main valve in time and cut off pilot valve, owing to pilot valve does not completely cut through, even if still having a small amount of front pressurized air source in the case of main valve is closed to flow into downstream line through pilot valve.Obviously, this can leave great potential safety hazard to downstream line maintenance activity and numerous user.This is a technical task of the most highly desirable solution in gas company, and this is also that existing indirect-action type pressure regulator also needs to improve further and perfect place, and the present invention wants to continue to solve this problem just.
Summary of the invention
Under-voltage auto-closing pressure regulator after a kind of valve is proposed in place of the purpose of the present invention is intended to overcome deficiencies of the prior art, it is on the premise of retaining voltage-regulation voltage-stabilization basic function, when there is hypotony or " booster decompression " extreme phenomenon in downstream gas line network, it can be automatically switched off main valve and pilot valve, to thoroughly eliminating the potential safety hazard of downstream line maintenance activity, guaranteeing that downstream user gas has safely positive effect.
It is an object of the invention to realize by following technical solution:
nullUnder-voltage auto-closing pressure regulator after a kind of valve that the present invention proposes，It includes being connected and installed in input pipe before valve、The main valve of outlet tube after valve、It is fitted to the homophony bellows of main valve、Pressure regulation pilot valve、It is connected to the signal outlet tube of pressure regulation pilot valve、Pressure pipe and be connected to the front pressure signal pipe of input pipe before valve after commander，In homophony bellows equipped homophony diaphragm be divided on film air chamber、Lower film air chamber，The port of export of signal outlet tube is connected and installed in homophony bellows and is connected with lower film air chamber，Homophony bellows is connected and installed with respectively with upper film air chamber、Pressure pipe after the homophony that lower film air chamber communicates、Signal return duct，Pressure pipe after described homophony、After signal return duct and commander, the other end of pressure pipe is connected to outlet tube after valve，Air inlet pipe seam at pressure regulation pilot valve is connected and installed with signal catheter，It is characterized in that: between front pressure signal pipe and signal catheter, be connected pressure controller after installation，Described rear pressure controller includes application valve body、It is installed on the bonnet, of application valve body、Bottom flange、Upper control spring、Lower control spring and universal driving shaft，Between application valve body and bottom flange, equipped rear pressuring film plate presses chamber after being divided into、Rear pressure chamber，Described lower control spring is supported on rear pressuring film plate in being fitted to rear pressure chamber，Between application valve body and bonnet, equipped master control diaphragm is divided into master control epicoele、Master control cavity of resorption，Described upper control spring is fitted in master control intracavity and is supported between master control diaphragm and spring base，The master control screw top being fitted to bonnet, is pressed on the spring base under-voltage set mechanism of composition，The two ends of universal driving shaft are connected to rear pressuring film plate、Master control diaphragm，The inlet channel communicated with master control cavity of resorption it is provided with in application valve body、Outlet passageway，The master control valve being fitted in inlet channel and the sealing gasket being flush-mounted in master control diaphragm constitute pressure regulation signal valve mouth structure，The front pressure signal pipe port of export is fitted in the air inlet connecting hole of application valve body，The entrance point of signal catheter is fitted to the connecting hole of giving vent to anger of application valve body and is connected with pressure regulation pilot valve，Bottom flange is provided with pressure pipe after the master control communicated with rear pressure chamber，Outlet tube after the other end of pressure pipe is connected to valve after master control.It is significantly structurally characterized in that: pressure controller device after the inlet end of pressure regulation pilot valve is further added by equipped, after line pressure downstream signal is imported in the rear pressure chamber of pressure controller, being turned on and off of pressure controller after being regulated and controled by line pressure downstream, i.e. controllable is turned on and off the pressure regulation source of the gas signal of pressure regulation pilot valve.When downstream output pressure is higher than when setting fluctuation in the range of under-voltage value, pressure regulation pilot valve can carry out normal voltage-regulation voltage-stabilization operation to the main valve being installed on gas transmission line, when gas line network downstream pressure as little as sets under-voltage value, pressure controller the pressure regulation source of the gas signal of fast shut-off pressure regulation pilot valve after its meeting closedown voluntarily, at this moment pressure regulator can because of pressure out of hand quick closedown main valve, can realize being automatically switched off the goal of the invention of the main valve pressure regulation signal source of the gas of cutting-off pressure-regulating pilot valve the most simultaneously, can thoroughly eliminate potential safety hazard when downstream line carries out maintenance activity, to guaranteeing that downstream user gas has safely obvious effect.
The present invention also has a following technical characteristic:
After the master control of the front input pipe of valve and rear pressure controller, it is connected and installed with reset airway between pressure pipe, reset airway is provided with reset angle valve.The design of this structure is particularly convenient in pressure regulator carries out opening the operation of reset, only need to rotate reset angle valve, bleed pressure in input pipe before valve is moved on pressuring film plate in pressure chamber and after promotion after pressure controller after pressure pipe importing after master control, pressure regulation signal valve port can be opened reset, signal source of the gas is pressed before inputting pipe network in pressure regulation command valve, after pressure regulator regains control pressure, turn off reset angle valve, the normal voltage-regulation voltage-stabilization operation of the fast quick-recovery of pressure regulator can be made.
Described sealing gasket uses silastic material to make.Selecting silastic material to make sealing gasket and have high wear-resisting erosion resistibility, it has certain effect to raising voltage-regulation voltage-stabilization performance, prolongation working life.
The present invention has following prominent substantive distinguishing features and a marked improvement:
The present invention has initiated under-voltage auto-closing pressure regulator after the valve of the equipped rear pressure controller of pressure regulation pilot valve inlet end, and it is to utilize line pressure downstream to act on pressure controller and then the pressure regulation source of the gas signal of control pressure regulation pilot valve after rear pressuring film plate opens and closes.When downstream output pressure is higher than the setting under-voltage value of rear pressure controller, rear pressure controller is in opening, it can make pressure regulation pilot valve obtain pressure regulation signal source of the gas and main valve carries out normal voltage-regulation voltage-stabilization operation, when downstream output pressure as little as sets under-voltage value or " booster decompression ", it can be automatically switched off the signal source of the gas of rear pressure controller cutting-off pressure-regulating pilot valve, make pressure regulator pressure out of hand and then quick closedown main valve, can effectively stop upstream pressure regulation source of the gas and flow to the phenomenon of downstream line through pilot valve, the potential safety hazard that causes when can thoroughly eliminate downstream line maintenance activity and guarantee downstream user use gas safety.Trial show that: the present invention has that the simple and direct production cost of structure is low, easy to install, stable really, long working life, outstanding advantages that maintenance activity security performance is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention, and also make an abstract accompanying drawing.
Fig. 2 is the structural representation (amplification) of the rear pressure controller HK of the present invention, arranges the schematic diagram of pressure regulation signal valve mouth structure in being illustrated in application valve body.
Fig. 3 is the structural representation of the pressure regulation pilot valve ZH of the present invention.
Description of symbols in accompanying drawing:
null1 is reset angle valve，2 is homophony spring，3 is main valve，4 is reset airway，5 is hollow arrow，6 is input pipe before valve，7 is valve pocket，8 is spool，9 is homophony valve rod，10 is lower film air chamber，11 is homophony diaphragm，12 is solid arrow，13 is front pressure signal pipe，14 is signal outlet tube，15 is signal catheter，16 is pressure pipe after commander，17 is pressure pipe after master control，18 is upper film air chamber，19 is pressure pipe after homophony，20 is signal return duct，21 is homophony bellows，22 is primary valve，23 is outlet tube after valve，24 is lower control spring，25 is bottom flange，26 is rear pressuring film plate，27 is rear pressure chamber，28 is universal driving shaft，29 is connecting hole of giving vent to anger，30 is outlet passageway，31 is master control cavity of resorption，32 is master control epicoele，33 is master control screw rod，34 is spring base，35 is upper control spring，36 is bonnet,，37 is master control diaphragm，38 is sealing gasket，39 is pressure regulation signal valve port，40 is application valve body，41 is master control valve，42 is air inlet connecting hole，43 is inlet channel，44 be after press chamber，45 is rear crimping entrance，46 is homophony screw rod，47 is pressure regulation cavity of resorption，48 is throttling epicoele，49 is pressure regulation valve body，50 is escape pipe interface，51 is throttle membrane，52 is throttling cavity of resorption，53 for lowering spring，54 is pressure regulation lower cover，55 is pressure regulation valve，56 is air inlet pipe interface，57 is voltage regulation diaphragm，58 is pressure regulating axis，59 is pressure regulation epicoele，60 for raising spring，61 is pressure regulation upper cover，ZH is pressure regulation pilot valve，HK is rear pressure controller.
Detailed description of the invention
Further describe embodiments of the invention below in conjunction with the accompanying drawings:
Under-voltage auto-closing pressure regulator after a kind of valve, it mainly by main valve 3 between outlet tube 23 after being connected and installed in the front input pipe of valve 6, valve, be fitted to the homophony bellows 21 of main valve 3, pressure regulation pilot valve ZH, rear pressure controller HK and front pressure signal pipe 13, signal catheter 15, signal outlet tube 14, signal return duct 20, homophony after after pressure pipe 19 and commander pressure pipe 16 constitute.Be fitted with homophony valve rod 9, homophony spring 2 and valve pocket 7 in main valve 3, spool 8 constitutes the pressure adjusting structure regulating primary valve 22 open degree.In homophony bellows 21 equipped homophony diaphragm 11 be divided on film air chamber 18, lower film air chamber 10, the upper end of homophony valve rod 9 is connected to homophony diaphragm 11, is connected and installed with pressure pipe 19, signal return duct 20 after the homophony communicated with upper film air chamber 18, lower film air chamber 10 respectively on homophony bellows 21.nullDescribed pressure regulation pilot valve ZH includes pressure regulation valve body 49、It is installed on the pressure regulation lower cover 54 of pressure regulation valve body 49、Pressure regulation upper cover 61、Lower spring 53、Raise spring 60、Pressure regulating axis 58 and homophony screw rod 46，Between pressure regulation valve body 49 and pressure regulation lower cover 54, equipped throttle membrane 51 is divided into throttling cavity of resorption 52、Throttling epicoele 48，Lower in spring 53 is fitted to throttling cavity of resorption 52 and be supported on throttle membrane 51，Pressure pipe 16 after the commander communicated with the cavity of resorption 52 that throttles it is fitted with bottom pressure regulation lower cover 54，Between pressure regulation valve body 49 and pressure regulation upper cover 61, equipped voltage regulation diaphragm 57 is divided into pressure regulation cavity of resorption 47、Pressure regulation epicoele 59，Raise in spring 60 is fitted to pressure regulation epicoele 59 and be supported on voltage regulation diaphragm 57，Described homophony screw rod 46 is fitted to pressure regulation upper cover 61 by thread connecting mode and constitutes pressure regulation setting structure，The two ends of pressure regulating axis 58 are fixedly connected on throttle membrane 51、Voltage regulation diaphragm 57 constitutes double film link gear，The escape pipe interface 50 communicated with the epicoele 48 that throttles it is provided with in pressure regulation valve body 49、Interior auxiliary tone calm the anger mouth 55 air inlet pipe interface 56 formed throttling air passage structure，Described signal outlet tube 14 connects the escape pipe interface 50 being fitted to pressure regulation valve body 49，The port of export of signal outlet tube 14 is connected and installed in homophony bellows 21 and is connected with lower film air chamber 10.nullDescribed rear pressure controller HK includes application valve body 40、It is installed on the bonnet, 36 of application valve body 40、Bottom flange 25、Upper control spring 35、Lower control spring 24、Universal driving shaft 28 and master control screw rod 33，Between application valve body 40 and bottom flange 25, equipped rear pressuring film plate 26 presses chamber 44 after being divided into、Rear pressure chamber 27，Described lower control spring 24 is supported on rear pressuring film plate 26 in being fitted to rear pressure chamber 27，Between application valve body 40 and bonnet, 36, equipped master control diaphragm 37 is divided into master control epicoele 32、Master control cavity of resorption 31，In described upper control spring 35 is fitted to master control epicoele 32 and be supported between master control diaphragm 37 and spring base 34，Master control screw rod 33 top being fitted to bonnet, 36 by thread connecting mode is pressed on spring base 34 and constitutes under-voltage set mechanism，The two ends of described universal driving shaft 28 are connected to rear pressuring film plate 26、Master control diaphragm 37 constitutes double film link gear，The inlet channel 43 communicated with master control cavity of resorption 31 it is provided with in application valve body 40、Outlet passageway 30，The master control valve 41 being fitted in inlet channel 43 and the sealing gasket 38 being flush-mounted in master control diaphragm 37 constitute pressure regulation signal valve port 39 structure，Described sealing gasket 38 can be selected for silastic material and makes.The port of export of front pressure signal pipe 13 is fitted to the air inlet connecting hole 42 of application valve body 40, the entrance point of signal catheter 15 is fitted to the connecting hole 29 of giving vent to anger of application valve body 40 and is connected with pressure regulation pilot valve ZH, pressure pipe 17 after the master control communicated with rear pressure chamber 27 is installed at the rear crimping entrance 45 bottom bottom flange 25, after master control, before pressure pipe 17 and valve, between input pipe 6, is connected and installed with reset airway 4 and reset angle valve 1 is installed on reset airway 4.nullIt is to carry out installing operation as follows: first main valve 3 is fixed being connected and installed in input pipe 6 before valve、After valve between outlet tube 23，As shown in hollow arrow 5，I.e. may make up " the main air delivering pipeline passage " downstream supplied by input pipe before valve 6 outlet tube 23 after main valve 3 to valve，The inlet end of front pressure signal pipe 13 is fixedly connected on input pipe 6 before valve，Again by pressure pipe after homophony 19、Signal return duct 20、Pressure pipe 16 after commander、Outlet tube 23 after the other end of pressure pipe 17 is connected to valve after master control，Can be formed as shown in solid arrow 12，By input pipe before valve 6 premenstrual pressure signal pipe 13、Rear pressure controller HK、Signal catheter 15、Pressure regulation pilot valve ZH、Signal outlet tube 14、After lower film air chamber 10 to the valve of homophony bellows 21 " the pressure regulation signal source of the gas passage " of the upstream pressure fluctuation of outlet tube 23，And the common effect that this " pressure regulation signal source of the gas passage " also will be fluctuated by downstream pressure simultaneously.
It should be noted that when rear pressure controller HK factory testing, " under-voltage value after valve " can be preset on pressure testers according to " transmission & distribution send civil gas management rule of operation " regulation supply gas pressure technical specification.Its mode of operation is: the front pressure signal pipe 13 of rear pressure controller HK is connected to pressure testers, first in startup pressure testers pressure controller HK backward, input pressure is the compressed gas of " under-voltage value after valve " to be set, the most slowly rotate master control screw rod 33 and be gradually increased the control spring 35 pressure to master control diaphragm 37, the position of sealing master control screw rod 33 when upper control spring 35 promotes master control diaphragm 37 sealing gasket 38 be able to be made to close master control valve 41 during shifting downwards, so far, the setting operation to rear pressure controller HK " under-voltage value after valve " is i.e. completed.Also can carry out following verification operation, after the output pressure of pressure testers is raised, can open master control valve 41 makes pressure regulation signal valve port 39 in opening, when again the output pressure of pressure testers being down to " under-voltage value after valve " that set, it can close again master control valve 41 makes pressure regulation signal valve port 39 in closed mode.Certainly, it is possible at the on-the-spot setting operation that rear pressure controller HK is carried out " under-voltage value after valve " of installation.
It is under-voltage closedown operation after being performed such normal voltage-regulation voltage-stabilization and valve:
nullThe supply rated pressure technology requirement specified according to " transmission & distribution send civil gas management rule of operation "，The spring 60 pressure to voltage regulation diaphragm 57 is raised in homophony screw rod 46 regulation of operation pressure regulation pilot valve ZH，The air pressure in input 21 times film air chambers 10 of homophony bellows can be regulated by the throttle opening of regulation pressure regulation valve 55，The opening degree shifting and then regulating primary valve 22 by homophony valve rod 9 band movable valve plug about 8 again regulates the output gas pressure of main valve 3，It carries out the principle of voltage-regulation voltage-stabilization in actual moving process: during the under-voltage value that the range of pressure fluctuations in gas line network downstream sets higher than rear pressure controller HK，Rear pressure controller HK is in opening，Rear pressuring film plate 26 in pressure controller HK after i other words、Master control diaphragm 37 can the rear pressure in pressure chamber 27 after pressure pipe 17 imports after master control、The pressure regulation signal valve port 39 making sealing gasket 38 and master control valve 41 be formed under the common effect of lower control spring 24 and upper control spring 35 is in opening.Three kinds of mode of operations are divided to be further described the most again:
1. the mode of operation of the present invention normal voltage-regulation voltage-stabilization operation: the pressure regulation signal source of the gas of pressure oscillation before gas line network upstream valve be inputted by input pipe before valve 6 premenstrual pressure signal pipe 13 after in pressure controller HK, after the pressure regulation signal valve port 39 of master control valve 41 and sealing gasket 38 composition being flush-mounted in master control diaphragm 37 carries out throttling pressure regulation, exported by outlet passageway 30 again and in signal catheter 15 inputs pressure regulation pilot valve ZH, after the pressure regulation valve 55 in pressure regulation pilot valve ZH carries out throttling pressure regulation, enter throttling epicoele 48 again and act on throttle membrane 51, throttle membrane 51 can be made to be shifted over due to the fluctuation of gas line network upstream upstream pressure and change the throttle opening of pressure regulation valve 55 and throttle membrane 51, the pressure in throttling epicoele 48 is made to change with the fluctuation of pipe network upstream pressure.So far, can be inputted, by signal outlet tube 14, the pressure regulation signal changed with pressure oscillation before upstream valve in the lower film air chamber 10 of homophony bellows 21 and act on homophony diaphragm 11 and promote homophony diaphragm 11 to move up and down along with upstream pressure fluctuations, opening degree and then the output gas pressure of regulation main valve 3 of primary valve 22 can be regulated by the displacement of homophony valve rod 9 band movable valve plug about 8.So far, can realize gas line network is carried out automatic regulation and to the stable combustion gas of downstream user output pressure for normal purpose.
2. present invention mode of operation of under-voltage closedown operation after carrying out valve: when the pressure drop in gas line network downstream is as little as to setting under-voltage value or prominent " the booster decompression " of rear pressure controller HK, the upper control spring 35 of rear pressure controller HK can quickly promote master control diaphragm 37 to move down and make sealing gasket 38 to close master control valve 41, at this moment, pressure regulation signal valve port 39 is in the closed mode of cutting-off pressure-regulating signal source of the gas.I other words, time " under-voltage value after valve " that after being imported by pressure pipe after master control 17, after pressure controller HK, the gas pressure in pressure chamber 27 as little as sets, the rear pressuring film plate 26 of rear pressure controller HK and master control diaphragm 37 original equilbrium position state are destroyed, upper control spring 35 can promote master control diaphragm 37 quickly to move down and be closed master control valve 41 by the sealing gasket 38 being flush-mounted in master control diaphragm 37 and the closed mode that makes pressure regulation signal valve port 39 be in cutting-off pressure-regulating signal source of the gas, owing to the closedown of rear pressure controller HK can cut off the pressure regulation signal source of the gas to pressure regulation pilot valve ZH input, the lower film air chamber 10 of homophony bellows 21 will be in decompression state.At this moment, in being fitted to main valve 3, homophony spring 2 can promote spool 8 quickly to move down and close primary valve 22, so far, can realize quick closedown main valve 3 and the goal of the invention of rear pressure controller HK, thoroughly elimination downstream line maintenance activity potential safety hazard.
3. the present invention carries out manually opened reset and recovers the mode of operation of supply operation: after maintenance downstream line is the most errorless, get final product manually opened reset angle valve 1, by reset airway 4 by the compressed gas in input pipe before valve 6 after after master control, pressure pipe 17 inputs after pressure controller HK in pressure chamber 27, can upwardly after pressuring film plate 26 and by universal driving shaft 28 drive on master control diaphragm 37 move, make pressure regulation signal valve port 39 open to reset, pressure regulation signal source of the gas can be inputted in pressure regulation command valve ZH, reset angle valve 1 is turned off after pressure regulator regains control pressure, the normal voltage-regulation voltage-stabilization operation of the fast quick-recovery of pressure regulator can be made.
Claims (3)
- null1. under-voltage auto-closing pressure regulator after a valve，It includes being connected and installed in input pipe (6) before valve、The main valve (3) of outlet tube (23) after valve、It is fitted to the homophony bellows (21) of main valve (3)、Pressure regulation pilot valve (ZH)、It is connected to the signal outlet tube (14) of pressure regulation pilot valve (ZH)、Pressure pipe (16) and the front pressure signal pipe (13) of input pipe (6) before being connected to valve after commander，In homophony bellows (21), equipped homophony diaphragm (11) is divided into upper film air chamber (18)、Lower film air chamber (10)，The port of export of signal outlet tube (14) is connected and installed in homophony bellows (21) and is connected with lower film air chamber (10)，Homophony bellows (21) is connected and installed with respectively with upper film air chamber (18)、Pressure pipe (19) after the homophony that lower film air chamber (10) communicates、Signal return duct (20)，Pressure pipe (19) after described homophony、After signal return duct (20) and commander, the other end of pressure pipe (16) is connected to outlet tube (23) after valve，It is connected and installed with signal catheter (15) at air inlet pipe interface (56) place of pressure regulation pilot valve (ZH)，It is characterized in that: between front pressure signal pipe (13) and signal catheter (15), be connected pressure controller (HK) after installation，Described rear pressure controller (HK) includes application valve body (40)、It is installed on the bonnet, (36) of application valve body (40)、Bottom flange (25)、Upper control spring (35)、Lower control spring (24) and universal driving shaft (28)，Between application valve body (40) and bottom flange (25), equipped rear pressuring film plate (26) presses chamber (44) after being divided into、Rear pressure chamber (27)，Described lower control spring (24) is supported on rear pressuring film plate (26) in being fitted to rear pressure chamber (27)，Between application valve body (40) and bonnet, (36), equipped master control diaphragm (37) is divided into master control epicoele (32)、Master control cavity of resorption (31)，Described upper control spring (35) is fitted in master control epicoele (32) and is supported between master control diaphragm (37) and spring base (34)，Master control screw rod (33) top being fitted to bonnet, (36) is pressed on spring base (34) and constitutes under-voltage set mechanism，The two ends of universal driving shaft (28) are connected to rear pressuring film plate (26)、Master control diaphragm (37)，The inlet channel (43) communicated with master control cavity of resorption (31) it is provided with in application valve body (40)、Outlet passageway (30)，The master control valve (41) being fitted in inlet channel (43) and the sealing gasket (38) being flush-mounted in master control diaphragm (37) constitute pressure regulation signal valve port (39) structure，Front pressure signal pipe (13) port of export is fitted in the air inlet connecting hole (42) of application valve body (40)，The entrance point of signal catheter (15) is fitted to the connecting hole of giving vent to anger (29) of application valve body (40) and is connected with pressure regulation pilot valve (ZH)，Bottom flange (25) is provided with pressure pipe (17) after the master control communicated with rear pressure chamber (27)，Outlet tube (23) after the other end of pressure pipe (17) is connected to valve after master control.
- Under-voltage auto-closing pressure regulator after valve the most according to claim 1, it is characterized in that: before valve, after the master control of input pipe (6) and rear pressure controller (HK), between pressure pipe (17), be connected and installed with reset airway (4), reset airway (4) is provided with reset angle valve (1).
- Under-voltage auto-closing pressure regulator after valve the most according to claim 1 and 2, it is characterised in that: described sealing gasket (38) uses silastic material to make.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410760111.2A CN104482279B (en) | 2014-12-12 | 2014-12-12 | Under-voltage auto-closing pressure regulator after valve |
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| CN201410760111.2A CN104482279B (en) | 2014-12-12 | 2014-12-12 | Under-voltage auto-closing pressure regulator after valve |
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| CN104482279A CN104482279A (en) | 2015-04-01 |
| CN104482279B true CN104482279B (en) | 2016-10-05 |
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| US9760097B2 (en) * | 2015-06-03 | 2017-09-12 | Emerson Process Management Regulator Technologies, Inc. | Adjustable deadband control system |
| CN105423132B (en) * | 2015-12-09 | 2019-03-08 | 高拓石油天然气技术（上海）有限责任公司 | A kind of natural gas pressure regulating system and its setting method |
| CN106286927B (en) * | 2016-11-01 | 2018-08-03 | 四川长仪油气集输设备股份有限公司 | From pressure-loaded formula pressure regulator |
| CN111022745B (en) * | 2019-12-12 | 2021-08-20 | 乐山川天燃气输配设备有限公司 | Automatic open-close valve |
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| CN202065536U (en) * | 2011-04-29 | 2011-12-07 | 雷鸣 | Underpressure cutoff valve executor |
| CN204420279U (en) * | 2014-12-12 | 2015-06-24 | 乐山川天燃气输配设备有限公司 | Under-voltage auto-closing pressure regulator after valve |
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