CN104482283A - Upstream under-pressure automatic closing pressure regulator - Google Patents
Upstream under-pressure automatic closing pressure regulator Download PDFInfo
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- CN104482283A CN104482283A CN201410760166.3A CN201410760166A CN104482283A CN 104482283 A CN104482283 A CN 104482283A CN 201410760166 A CN201410760166 A CN 201410760166A CN 104482283 A CN104482283 A CN 104482283A
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Classifications
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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
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/38—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side
- F16K31/385—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side the fluid acting on a diaphragm
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
Abstract
The invention discloses an upstream under-pressure automatic closing pressure regulator, which mainly consists of a main valve, a director and an under-pressure closing controller, wherein the main valve is installed for ordinary users. The upstream under-pressure automatic closing pressure regulator is structurally characterized in that the under-pressure closing controller is assembled at the front end of the director of the existing pressure regulator, a voltage regulating signal air source can be subjected to automatic starting and stopping control operation, when the pipe network pressure is higher than the set under-pressure value, the director can obtain the pressure regulation air source to carry out pressure regulation operation on the main valve, when the pipe network pressure is lower than the set under-pressure value, the pressure regulation signal air source can be automatically cut off to close the main valve, the air source can be regulated and allocated in a centralized way, and the gas supply operation can be realized on important users. The upstream under-pressure automatic closing pressure regulator has the obvious advantages that the structure is simple, the production cost is low, the installation and the use are convenient, the automatic management degree is high, the operation is safe and reliable, and the work life is long. The obvious technical effects are realized on improving the management and control level of pressure regulation, pressure stabilization and gas supply regulation and allocation of a gas conveying pipeline by urban fuel gas companies, and the upstream under-pressure automatic closing pressure regulator has very good application prospects in gas conveying industry.
Description
Technical field
The present invention relates to gas line network regulator, under-voltage auto-closing pressure regulator before particularly relating to a kind of valve, belong to the technical field of delivery of fuel gas being carried out to pressure regulation allotment, it is particularly suitable for installing and using on the gas pipelines such as rock gas, liquefied petroleum gas (LPG), gas, coal gas and CNG voltage regulating station, has obviously technique effect to lifting gas company to gas line network " voltage-regulation voltage-stabilization, allotment air feed " management operations level.
Background technique
In recent years, along with the high speed development of Chinese national economy, greatly advance the process of Urbanization Construction, expand gradually in existing urban size, under the background of the quick increase-volume of resident population, the demand of a lot of city to Domestic Gas and industrial gas is just presenting the gesture of accelerated growth.At present, most cities gas company of China is subject to the multifactorial restrictions of storage such as gas line network equipment gas supply capacity deficiency or combustion gas resource quota all unavoidably, face the difficult situation being difficult to maintain normal supply gas pressure due to " pressure of gas line network is on the low side fluctuation " to some extent, particularly use that all can frequently occur gas peak period, a lot of city because source of the gas is not enough, ductwork pressure is on the low side cannot the phenomenon of normal air feed in the winter time.For the phenomenon of " ductwork pressure is on the low side causes air supply pressure fluctuation ", gas company adopts on gas transmission line, to install indirect-action type pressure regulator carry out " peak load shifting " to realize voltage-regulation voltage-stabilization to gaseous-pressure, the basic structure of existing indirect-action type pressure regulator is: the pilot valve composition that it is connected with pressure regulation signal tube primarily of the main valve be installed on gas transmission line, voltage-regulation voltage-stabilization working principle is: the Pressure Fluctuation Signal of gas line network imported in pilot valve and promote voltage regulation diaphragm and move up and down with pressure surge and then change throttle opening, the pressure regulation signal with ductwork pressure fluctuation can be inputted in the homophony bellows of main valve, being shifted up and down by homophony diaphragm promotion valve rod regulates the open degree of main valve to carry out in good time pressure regulation again, can to the stable combustion gas of downstream user delivery pressure for.To be objective, existing indirect-action type pressure regulator has fine using effect when " pressure is on the low side, and fluctuation is little " to the normal air feed operation of maintenance.But, due to " source of the gas lazy weight cause pressure of gas line network too low " cause regionality cannot normally air feed time, gas company is according to " gas user categorized support grade " relevant regulations, takes the gas transmission line of closing " general user " to guarantee the air feed demand of " key responsible consumer ".We find in the R&D work of long campaigns gas line network pressure governor product: because existing indirect-action type pressure regulator can only play pressure regulation effect in actual motion, when pressure of gas line network is too low, it cannot close operation automatically to " general user " gas transmission line, also cannot recover automatically to carry out unlatching reset operation normally at pressure of gas line network.Up to now, gas company sends special pipelines staff manually close to gas transmission line or open the operation of reset on the spot.Unquestionable, the original backwardness of mode of operation of reset is manually closed or is opened in this dependence, have that pipeline workman goes out that road is far away, operated valve labor intensity is high, longevity of service, keying operation the defect that emergent timeliness is low, time-consuming and operation management cost is high.Trace it to its cause mainly current regulators in structural design also scientific and reasonable not to the utmost, using function too single caused by, always this perplex gas company for a long time and a urgent technical problem of wishing to solve, and the present invention wants to address this problem just.
Summary of the invention
Object of the present invention is intended to overcome existing pressure governor above shortcomings part and under-voltage auto-closing pressure regulator before proposing a kind of valve, it is particularly suitable for being fitted on the gas transmission line of " general user ", when ductwork pressure is low to moderate the under-voltage value of setting, it can close stopping air feed automatically, automatically opening again after ductwork pressure is normal resets recovers air feed operation in time, effectively can promote the management control ability of gas company to gas line network " voltage-regulation voltage-stabilization, allotment air feed ".
The object of the invention is to realize by following technical solution:
Under-voltage auto-closing pressure regulator before a kind of valve that the present invention proposes, it comprises being connected to input is responsible for, export the main valve of supervisor, be installed on homophony bellows and the pilot valve of main valve, valve seat is fitted with in main valve, cage type valve pocket, spool, valve rod and homophony spring, in homophony bellows, equipped diaphragm unit is divided into upper gas chamber, lower chamber, valve rod is connected to diaphragm unit, pilot valve comprises pressure regulation valve body, bonnet, bottom flange, screw press, upper spring, between pressure regulation valve body and bottom flange, equipped throttle membrane is divided into throttling epicoele, throttling cavity of resorption, lower spring is fitted with in throttling cavity of resorption, between pressure regulation valve body and bonnet, equipped voltage regulation diaphragm is divided into pressure regulation air cavity, pressure regulating axis two ends are connected to voltage regulation diaphragm, throttle membrane, the inlet hole being provided with air outlet hole and the equipped throttling valve communicated with throttling epicoele in pressure regulation valve body forms throttling pressure regulation air passage structure, in air inlet position connection pressure regulation suction tude, the pressure regulation steam outlet pipe communicated with the lower chamber of homophony bellows is connected and installed with at air outlet hole place, homophony bellows is connected with respectively with upper gas chamber, pressure pipe after the homophony that lower chamber communicates, reflow pipe, pressure pipe after the throttling communicated with throttling cavity of resorption is connected with bottom bottom flange, pressure pipe after homophony, pressure pipe after throttling, reflow pipe is communicated in and exports supervisor, it is characterized in that: before being connected and installed with between input supervisor and pressure regulation suction tude, press supplying tube and under-voltage closing controller, under-voltage closing controller comprises control valve body, be installed on the control valve seat of control valve body, application valve cover and Control Shaft, before equipped between control valve body and control valve seat, pressuring film plate presses chamber before being divided into, front pressure chamber, pressing spring before being fitted with in front pressure chamber, between control valve body and application valve cover, the equipped diaphragm that controls is divided into control epicoele, control cavity of resorption, the two ends of Control Shaft are connected to front pressuring film plate, control diaphragm, the control spring being supported on and controlling diaphragm and wedge is fitted with in control epicoele, the control screw top being fitted to application valve cover is pressed on wedge and forms closing control structure, be provided with in control valve body and the importing air flue controlling cavity of resorption and communicate, derive air flue, be fitted to the control valve that imports air flue and be flush-mounted in seal ring that the silicone rubber material that controls diaphragm makes and formed and open and close valve mouth structure, described pressure regulation suction tude is connected and installed in the output attachment hole of the derivation air flue of control valve body, front pressure supplying tube is connected and installed in the input attachment hole of the importing air flue of control valve body, the inlet end of front pressure supplying tube is connected to input supervisor, pressure pipe before communicating with front pressure chamber is connected and installed with bottom control valve seat, the inlet end of front pressure pipe is connected to front pressure supplying tube.Its significant structural feature is: it increases an equipped under-voltage closing controller again at the pilot valve inlet end of existing indirect-action type pressure regulator, first the Pressure Fluctuation Signal of gas line network is inputted in pilot valve after overvoltage/undervoltage closing controller again, when pressure of gas line network fluctuates in the scope higher than setting under-voltage value, normal voltage-regulation voltage-stabilization operation can be carried out to the main valve being installed on gas transmission supervisor by pilot valve, when pressure of gas line network is low to moderate setting under-voltage value, under-voltage closing controller can be closed the pressure regulation source of the gas of also fast shut-off pilot valve voluntarily and make pressure governor pressure out of hand, can realize automatically closing main valve stop " general user " air feed and concentrate the limited source of the gas of allotment to be used for guaranteeing the goal of the invention of " key responsible consumer " air feed.When pressure of gas line network returns to higher than setting under-voltage value, under-voltage closing controller can be opened voluntarily again and reset to pilot valve input pressure regulation source of the gas, makes pressure governor regain pilot pressure, can the normal voltage-regulation voltage-stabilization working state of fast quick-recovery pressure governor.
The present invention has following outstanding substantive distinguishing features and remarkable progress:
The present invention has initiated under-voltage auto-closing pressure regulator before the valve that one is installed on " general user " gas transmission line, it is equipped with at the pilot valve inlet end of existing pressure governor the control gear that a under-voltage closing controller is used as automatically to open or close pilot valve pressure regulation signal source of the gas, it is that first the pressure regulation signal source of the gas that fluctuated by ductwork pressure enters in pilot valve after under-voltage closing controller again, when the setting under-voltage value of pressure of gas line network higher than under-voltage closing controller, under-voltage closing controller is in opening state, pilot valve can carry out normal voltage-regulation voltage-stabilization operation to main valve after obtaining pressure regulation signal source of the gas, when pressure of gas line network is low to moderate setting under-voltage value, under-voltage closing controller can be closed voluntarily and cutting-off pressure-regulating signal source of the gas makes pressure governor pressure out of hand and closes, " general user " air feed can be stopped and concentrating allotment source of the gas to ensure the air feed demand of " key responsible consumer " by quick closedown main valve.Show through on probation: the present invention have structure simple and direct, produce easily, low cost of manufacture, easy to install, automatic management degree is high, safe and reliable to operation, the outstanding advantages of long working life, has obvious technique effect to promoting the regulatory level of city gas company to gas line network " voltage-regulation voltage-stabilization, allotment air feed " further.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention, and also make an abstract accompanying drawing.
Fig. 2 is the structural representation (amplification) of under-voltage closing controller of the present invention, is illustrated in control valve body and arranges the schematic diagram that front pressure-controlled opens and closes valve mouth structure.
Fig. 3 is the structural representation of pilot valve of the present invention.
Description of symbols in accompanying drawing:
1 is main valve, 2 is input supervisor, 3 is hollow arrow, 4 is solid arrow, 5 is front pressure pipe, 6 is front pressure supplying tube, 7 is pressure regulation steam outlet pipe, 8 is pressure regulation suction tude, 9 is lower chamber, 10 is homophony bellows, 11 is upper gas chamber, 12 is diaphragm unit, 13 is pressure pipe after homophony, 14 is pressure pipe after throttling, 15 is reflow pipe, 16 is homophony spring, 17 is valve rod, 18 is cage type valve pocket, 19 is spool, 20 is valve seat, 21 is main pressure regulator valve port, 22 for exporting supervisor, 23 is wedge, 24 is control spring, 25 for controlling epicoele, 26 for controlling diaphragm, 27 for controlling valve, 28 is input attachment hole, 29 for importing air flue, 30 is front pressure chamber, 31 is front pressing spring, 32 is control valve seat, 33 is front pressuring film plate, 34 for front to press chamber, 35 for exporting attachment hole, 36 is control valve body, 37 for deriving air flue, 38 for controlling cavity of resorption, 39 is Control Shaft, 40 is seal ring, 41 is application valve cover, 42 for controlling screw rod, 43 is bonnet, 44 is inlet hole, 45 is pressure regulation valve body, 46 is throttling valve, 47 is throttle membrane, 48 is lower spring, 49 is bottom flange, 50 is throttling cavity of resorption, 51 is throttling epicoele, 52 is air outlet hole, 53 is pressure regulating axis, 54 is pressure regulation air cavity, 55 is voltage regulation diaphragm, 56 is upper spring, 57 is screw press.
Embodiment
Embodiments of the invention are further described below in conjunction with accompanying drawing:
Under-voltage auto-closing pressure regulator before a kind of valve, it is formed primarily of pressure pipe 14, reflow pipe 15 after pressure pipe 13, throttling after main valve 1, pilot valve ZH, under-voltage closing controller QK and front pressure pipe 5, front pressure supplying tube 6, pressure regulation suction tude 8, pressure regulation steam outlet pipe 7, homophony, valve seat 20, cage type valve pocket 18, spool 19, valve rod 17 and homophony spring 16 is fitted with in main valve 1, main valve 1 fixedly mounts homophony bellows 10, in homophony bellows 10, equipped diaphragm unit 12 is divided into upper gas chamber 11, lower chamber 9, and the upper end of valve rod 17 is connected to diaphragm unit 12.Described pilot valve ZH comprises pressure regulation valve body 45, bonnet 43, bottom flange 49, screw press 57, pressure regulating axis 53, upper spring 56 and lower spring 48, between pressure regulation valve body 45 and bottom flange 49, equipped throttle membrane 47 is divided into throttling epicoele 51, throttling cavity of resorption 50, described lower spring 48 is fitted to throttling cavity of resorption 50 internal support in throttle membrane 47, pressure pipe 14 after the throttling communicated with throttling cavity of resorption 50 is connected with bottom bottom flange 49, pressure pipe 13 after described homophony, reflow pipe 15 be fixedly connected be installed on homophony bellows 10 and respectively with upper gas chamber 11, lower chamber 9 is connected, between pressure regulation valve body 45 and bonnet 43, equipped voltage regulation diaphragm 55 is divided into pressure regulation air cavity 54, pressure regulating axis 53 two ends are connected to voltage regulation diaphragm 55, throttle membrane 47, in pressure regulation valve body 45, be provided with the air outlet hole 52 communicated with throttling epicoele 51 form throttling pressure regulation air passage structure with the inlet hole 44 being fitted with throttling valve 46, described pressure regulation suction tude 8 connects the entrance point being fitted to inlet hole 44, pressure regulation steam outlet pipe 7 connects the outlet end being fitted to air outlet hole 52, the other end of pressure regulation steam outlet pipe 7 is fixedly connected with and is installed on homophony bellows 10 and is connected with lower chamber 9.Described under-voltage closing controller QK comprises control valve body 36, be installed on the control valve seat 32 of control valve body 36, application valve cover 41, Control Shaft 39, control screw rod 42, wedge 23, control spring 24 and front pressing spring 31, between control valve body 36 and application valve cover 41, the equipped diaphragm 26 that controls is divided into and controls epicoele 25, control cavity of resorption 38, described control spring 24 is fitted to and controls in epicoele 25 and be supported on to control between diaphragm 26 and wedge 23, push up with the control screw rod 42 of application valve cover 41 one-tenth screw thread fitting configuration and be pressed on wedge 23 and form closing control structure, be provided with in control valve body 36 and the importing air flue 29 controlling cavity of resorption 38 and communicate, derive air flue 37, be fitted to and import control valve 27 in air flue 29 and be flush-mounted in the ring of silicone rubber,sealing 40 controlling diaphragm 26 and formed and open and close valve mouth structure, described pressure regulation suction tude 8 is connected and installed in the output attachment hole 35 of derivation air flue 37, front pressure supplying tube 6 is connected and installed in the input attachment hole 28 of importing air flue 29, before equipped between control valve body 36 and control valve seat 32, pressuring film plate 33 presses chamber 34 before being divided into, front pressure chamber 30, the front pressing spring 31 be fitted in front pressure chamber 30 is supported on front pressuring film plate 33, the two ends of described Control Shaft 39 are connected to front pressuring film plate 33, control diaphragm 26, pressure pipe 5 before communicating with front pressure chamber 30 is connected and installed with bottom control valve seat 32, the inlet end of front pressure pipe 5 is connected to front pressure supplying tube 6.It carries out fitting operation as follows: according to the relevant regulations of " gas user categorized support grade ", the gas transmission line of " the general user " that choose carries out installment work, first main valve 1 is fixedly connected with and is installed on input supervisor 2, export between supervisor 22, can be formed as shown in hollow arrow 3, by inputting supervisor 2 through main valve 1 to exporting the air delivering pipeline passage of supervisor 22 to downstream air feed, again the inlet end of front pressure supplying tube 6 is fixedly connected on the input supervisor 2 of main valve 1 front end, by pressure pipe after homophony 13, pressure pipe 14 after throttling, reflow pipe 15 is fixedly connected with the output supervisor 22 being installed on main valve 1 rear end, can be formed as shown in solid arrow 4, by the premenstrual pressure supplying tube 6 of input supervisor 2, under-voltage closing controller QK, pressure regulation suction tude 8, pilot valve ZH, pressure regulation steam outlet pipe 7, the lower chamber 9 of homophony bellows 10 is to the gas line network upstream pressure fluctuation pressure regulation signal source of the gas passage exporting supervisor 22, this " pressure regulation signal source of the gas passage " can be subject to importing upstream pressure before under-voltage closing controller QK in pressure chamber 30 by front pressure pipe 5 simultaneously, by pressure pipe after throttling 14, after homophony, pressure pipe 13 imports pilot valve ZH throttling cavity of resorption 50 respectively, the acting in conjunction of the downstream pressure in the upper gas chamber 11 of homophony bellows 10.
As follows under-voltage closing controller QK is carried out to the setting operation of " before valve under-voltage value ": when under-voltage closing controller QK factory testing, the supply gas pressure specified according to " transmission & distribution send civil gas management working specification " and " general user " is closed to the technical requirements of gas transmission line " before valve under-voltage value ", pressure testers presets " before valve under-voltage value " under-voltage closing controller QK.That is to say, supplying tube 6 is pressed to be connected to pressure testers by before under-voltage closing controller QK, breakout pressure tester is the compressed gas of " before valve under-voltage value " to incoming pressure in under-voltage closing controller QK, slowly rotate control screw rod 42 again and increase control spring 24 gradually to the pressure controlling diaphragm 26, when seal ring 40 be able to be made in the process that control diaphragm 26 moves down to close control valve 27 close port, sealing controls the position of screw rod 42, namely completes the setting operation of " before valve the under-voltage value " to under-voltage closing controller QK.It should be noted that: after the output gas pressure of pressure testers is raised, the pressure that the gas entered in front pressure chamber 30 can overcome the former setting of control spring 24 upwardly before pressuring film plate 33 promote to control diaphragm 26 upward displacement by Control Shaft 39, can open control valve 27 makes valve port be opening state, when again gas pressure being down to " before valve the under-voltage value " of setting, control valve 27 can being closed again and make valve port be closed condition.Certainly, the setting operation of " before valve under-voltage value " can also be carried out when mounted.
Its under-voltage closedown operation before being performed such normal voltage-regulation voltage-stabilization and valve:
Before this reality is had the valve of novel proposition under-voltage auto-closing pressure regulator be fixedly connected be installed on " general user " gas transmission line on errorless on inspection after, according to the technical requirements of the normal air feed rated pressure that " transmission & distribution send civil gas management working specification " specifies, the screw press 57 i.e. pressure of adjustable upper spring 56 pairs of voltage regulation diaphragms 55 of signalman device ZH, the signal bleed pressure in the lower chamber 9 of input homophony bellows 10 is regulated by the throttle opening of adjustment pilot valve ZH internal segment gas mouth 46, namely to be shifted with movable valve plug about 19 by valve rod 17 and then to regulate the opening degree of main pressure regulator valve port 21 to carry out the pressure of regulation output gas, the principle that it carries out voltage-regulation voltage-stabilization in actual moving process is: during the under-voltage value that the range of pressure fluctuations in gas line network upstream sets higher than under-voltage closing controller QK, under-voltage closing controller QK is in opening state, that is to say the front pressuring film plate 33 in under-voltage closing controller QK, control the upstream pressure that diaphragm 26 can import in front pressure pipe 5, make seal ring 40 form " valve mouth structure " with control valve 27 under the acting in conjunction of front pressing spring 31 and control spring 24 and be in opening state.Before the valve dividing three kinds of mode of operations to propose the present invention below, the working principle of under-voltage auto-closing pressure regulator is further described:
1. the present invention is in the mode of operation of normal voltage-regulation voltage-stabilization operation: the pressure regulation signal source of the gas of pressure surge before gas line network upstream valve is the importing air flue 29 being entered under-voltage closing controller QK by input supervisor 2 premenstrual pressure supplying tube 6, control valve 27 and enter control cavity of resorption 38, pressure regulation suction tude 8 is exported to again by derivation air flue 37, the inlet hole 44 in pilot valve ZH is inputted again through pressure regulation suction tude 8, after throttling valve 46 throttling, enter throttling epicoele 51 and act on throttle membrane 47, pressure surge due to gas line network upstream can make throttle membrane 47 occur to be shifted and change the throttle opening of throttling valve 46 and throttle membrane 47 and the pressure in throttling epicoele 51 is changed with pipe network upstream pressure fluctuations.So far, the pressure regulation signal changed with gas line network upstream pressure fluctuations can be exported by air outlet hole 52, input the lower chamber 9 of homophony bellows 10 through pressure regulation steam outlet pipe 7 again and act on diaphragm unit 12, diaphragm unit 12 can be promoted move up and down along with gas line network upstream pressure fluctuations, to be shifted with movable valve plug about 19 by valve rod 17 again and then to regulate the opening degree of main pressure regulator valve port 21, so far, can realize carrying out automatic Regulation to gas line network and to the object of the stable combustion gas of downstream user delivery pressure for safe handling.
2. the mode of operation of the present invention's under-voltage closedown operation before carrying out valve: when the Pressure Drop of gas line network upstream is low to moderate " before valve the under-voltage value " to under-voltage closing controller QK setting, under-voltage closing controller QK can close the working state being in cutting-off pressure-regulating signal source of the gas voluntarily.That is to say, when the upstream pressure in pressure chamber 30 before importing under-voltage closing controller QK by front pressure pipe 5 is reduced to " before valve the under-voltage value " of setting, front pressuring film plate 33 in under-voltage closing controller QK, control diaphragm 26 original equilibrium position state to be destroyed, control spring 24 can promote to control diaphragm 26 and moves down and make " valve mouth structure " be in closed condition by being flush-mounted in the closed valve 27 that controls of the seal ring 40 controlling diaphragm 26, closedown due to under-voltage closing controller QK can be cut off the pressure regulation signal source of the gas of pilot valve ZH and make to be in decompression state in the lower chamber 9 of homophony bellows 10.At this moment, the homophony spring 16 be fitted in main valve 1 can promote spool 19 and move down closedown main pressure regulator valve port 21 thereupon, so far, quick closedown main valve 1 can be realized stop to " general user " air feed and concentrate allotment source of the gas to the goal of the invention of " key responsible consumer " air feed.
3. the present invention carries out automatically opening the mode of operation that reset recovers air feed operation: when the pressure recover of gas line network upstream normally rises to " before valve the under-voltage value " higher than setting, under-voltage closing controller QK can be in unlatching shape by self-resetting again.That is to say, when upstream pressure before importing under-voltage closing controller QK by front pressure pipe 5 in pressure chamber 30 rises to " before valve the under-voltage value " higher than setting, boosting gas in front pressure chamber 30 can promote front pressuring film plate 33 move up and by Control Shaft 39 drive control diaphragm 26 with on move, at this moment, be flush-mounted in the seal ring 40 controlling diaphragm 26 can be separated with control valve 27 and make " valve mouth structure " again be in opening state.So far, pressure regulation signal source of the gas can be swum on the net to supplying tube in pilot valve ZH after under-voltage closing controller QK opens, as mentioned above, can regain in the lower chamber 9 of homophony bellows 10 pressure regulation signal source of the gas promote diaphragm unit 12 to top offset and by valve rod 17 be with movable valve plug 19 with on move, can open main valve 1 to reset, fast quick-recovery is to the air feed operation of " general user ".
Obviously; above-described embodiment is only can one of the mode realizing technical solution of the present invention; the scope of protection of present invention is not limited only to above-described embodiment, also should comprise the alternate manner that can be changed according to technological scheme of the present invention by those of ordinary skill in the art.
Claims (2)
1. under-voltage auto-closing pressure regulator before a valve, it comprises being connected to input is responsible for (2), export the main valve (1) of supervisor (22), be installed on homophony bellows (10) and the pilot valve (ZH) of main valve (1), valve seat (20) is fitted with in main valve (1), cage type valve pocket (18), spool (19), valve rod (17) and homophony spring (16), in homophony bellows (10), equipped diaphragm unit (12) is divided into upper gas chamber (11), lower chamber (9), valve rod (17) is connected to diaphragm unit (12), pilot valve (ZH) comprises pressure regulation valve body (45), bonnet (43), bottom flange (49), screw press (57), upper spring (56), between pressure regulation valve body (45) and bottom flange (49), equipped throttle membrane (47) is divided into throttling epicoele (51), throttling cavity of resorption (50), lower spring (48) is fitted with in throttling cavity of resorption (50), between pressure regulation valve body (45) and bonnet (43), equipped voltage regulation diaphragm (55) is divided into pressure regulation air cavity (54), pressure regulating axis (53) two ends are connected to voltage regulation diaphragm (55), throttle membrane (47), the inlet hole (44) being provided with air outlet hole (52) and the equipped throttling valve (46) communicated with throttling epicoele (51) in pressure regulation valve body (45) forms throttling pressure regulation air passage structure, in inlet hole (44) place connection pressure regulation suction tude (8), the pressure regulation steam outlet pipe (7) communicated with the lower chamber of homophony bellows (10) (9) is connected and installed with at air outlet hole (52) place, homophony bellows (10) is connected with respectively with upper gas chamber (11), pressure pipe (13) after the homophony that lower chamber (9) communicates, reflow pipe (15), pressure pipe (14) after bottom flange (49) bottom is connected with the throttling communicated with throttling cavity of resorption (50), pressure pipe (13) after homophony, pressure pipe (14) after throttling, reflow pipe (15) is communicated in and exports supervisor (22), it is characterized in that: before being connected and installed with between input supervisor (2) and pressure regulation suction tude (8), press supplying tube (6) and under-voltage closing controller (QK), under-voltage closing controller (QK) comprises control valve body (36), be installed on the control valve seat (32) of control valve body (36), application valve cover (41) and Control Shaft (39), before equipped between control valve body (36) and control valve seat (32), pressuring film plate (33) presses chamber (34) before being divided into, front pressure chamber (30), front pressing spring (31) is fitted with in front pressure chamber (30), between control valve body (36) and application valve cover (41), the equipped diaphragm (26) that controls is divided into and controls epicoele (25), control cavity of resorption (38), the two ends of Control Shaft (39) are connected to front pressuring film plate (33), control diaphragm (26), the control spring (24) being supported on and controlling diaphragm (26) and wedge (23) is fitted with in control epicoele (25), control screw rod (42) top being fitted to application valve cover (41) is pressed on wedge (23) and forms closing control structure, be provided with in control valve body (36) and the importing air flue (29) controlling cavity of resorption (38) and communicate, derive air flue (37), be fitted to the control valve (27) that imports air flue (29) and be flush-mounted in the seal ring (40) controlling diaphragm (26) and formed and open and close valve mouth structure, described pressure regulation suction tude (8) is connected and installed in the output attachment hole (35) of the derivation air flue (37) of control valve body (36), front pressure supplying tube (6) is connected and installed in the input attachment hole (28) of the importing air flue (29) of control valve body (36), the inlet end of front pressure supplying tube (6) is connected to input supervisor (2), the front pressure pipe (5) communicated with front pressure chamber (30) is connected and installed with in control valve seat (32) bottom, the inlet end of front pressure pipe (5) is connected to front pressure supplying tube (6).
2. under-voltage auto-closing pressure regulator before valve according to claim 1, is characterized in that: described seal ring (40) adopts silicone rubber material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410760166.3A CN104482283B (en) | 2014-12-12 | 2014-12-12 | Upstream under-pressure automatic closing pressure regulator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410760166.3A CN104482283B (en) | 2014-12-12 | 2014-12-12 | Upstream under-pressure automatic closing pressure regulator |
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| CN104482283A true CN104482283A (en) | 2015-04-01 |
| CN104482283B CN104482283B (en) | 2017-01-25 |
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| CN201410760166.3A Active CN104482283B (en) | 2014-12-12 | 2014-12-12 | Upstream under-pressure automatic closing pressure regulator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111022745A (en) * | 2019-12-12 | 2020-04-17 | 乐山川天燃气输配设备有限公司 | Automatic open-close valve |
| CN112728180A (en) * | 2021-01-22 | 2021-04-30 | 中国煤炭科工集团太原研究院有限公司 | Nitrogen pressure-regulating pressure-reducing valve for waterway system of tunneling equipment and waterway system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111022745A (en) * | 2019-12-12 | 2020-04-17 | 乐山川天燃气输配设备有限公司 | Automatic open-close valve |
| 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 |
| CN112728180A (en) * | 2021-01-22 | 2021-04-30 | 中国煤炭科工集团太原研究院有限公司 | Nitrogen pressure-regulating pressure-reducing valve for waterway system of tunneling equipment and waterway system |
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|---|---|
| CN104482283B (en) | 2017-01-25 |
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