CN104482283B - Upstream under-pressure automatic closing pressure regulator - Google Patents
Upstream under-pressure automatic closing pressure regulator Download PDFInfo
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- CN104482283B CN104482283B CN201410760166.3A CN201410760166A CN104482283B CN 104482283 B CN104482283 B CN 104482283B CN 201410760166 A CN201410760166 A CN 201410760166A CN 104482283 B CN104482283 B CN 104482283B
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
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 more particularly, to a kind of valve, belong to right
Delivery of fuel gas carries out the technical field of pressure regulation allotment, it be particularly suitable for natural gas, liquefied petroleum gas, device in Gas, coal gas and
Install and use on the gas pipelines such as cng voltage regulating station, to lifting gas company to gas line network " voltage-regulation voltage-stabilization, allotment supply " pipe
Reason level of operation has obviously technique effect.
Background technology
In recent years, with the high speed development of Chinese national economy, greatly advance the process of Urbanization Construction, existing
City size gradually extends, under the background of the quick increase-volume of resident population, a lot of cities are to Domestic Gas and industrial gas
Demand is just assuming the gesture of accelerated growth.At present, China most cities gas company is all supplied by gas line network equipment unavoidably
Gas scarce capacity or be combustion gas resource quota etc. store up multifactorial restriction, face to some extent due to " pressure of gas line network
Low fluctuation " and be difficult to maintain the difficult situation of normal supply gas pressure, particularly use gas peak period in the winter time, a lot of cities are all
The phenomenon that cannot normally supply because source of the gas is not enough, ductwork pressure is low can frequently occur.For " ductwork pressure is low to be caused
The phenomenon of air supply pressure fluctuation ", gas company is mostly utilized on gas transmission line installing indirect-action type pressure regulator to combustion gas
Pressure carries out " peak load shifting " to realize voltage-regulation voltage-stabilization, and the basic structure of existing indirect-action type pressure regulator is: it mainly by
The main valve being installed on gas transmission line and the pilot valve of pressure regulation signal pipe connection form, and voltage-regulation voltage-stabilization operation principle is: by gas transmission
Promote voltage regulation diaphragm to move up and down with pressure oscillation and then change throttling in the Pressure Fluctuation Signal importing pilot valve of pipe network to open
Degree, you can input the pressure regulation signal with ductwork pressure fluctuation into the homophony bellows of main valve, then promoted on valve rod by homophony diaphragm
Lower displacement carries out in good time pressure regulation adjusting the open degree of main valve, you can the downstream stable combustion gas of user's output pressure is for use.
To be objective, existing indirect-action type pressure regulator in the case of " pressure low fluctuation less " to maintaining the operation of normal supply to be
Have and be advantageously used effect.But, due to " source of the gas lazy weight cause pressure of gas line network too low " causes regionality cannot be just
When often supplying, gas company is according to " gas user categorized support grade " relevant regulations, takes closing " general user "
Gas transmission line is guaranteeing the supply demand of " key responsible consumer ".We grind long campaigns gas line network pressure regulator product
Send out in work and find: because existing indirect-action type pressure regulator can only play pressure regulation effect in actual motion, work as gas line network
During hypotony, it cannot carry out being automatically switched off operation to " general user " gas transmission line, also cannot be in gas line network
Pressure carries out opening reset operation after recovering normally automatically.So far, gas company is all to send special pipelines staff
Manually turned off or on the operation of reset to gas transmission line on the spot.Unquestionable, this dependence manually turns off or on multiple
, there is pipeline workman and go out that road is remote, operation valve labor intensity height, longevity of service, open in the original backwardness of mode of operation of position
The emergent timeliness of closed operation is low, time-consuming and the defect of operational management high cost.Mainly current regulators of tracing it to its cause exist
Also scientific and reasonable not to the utmost in structure design, excessively single caused using function, this is to perplex gas company always simultaneously for a long time
One technical problem of highly desirable solution, the present invention is just intended to solve this problem.
Content of the invention
Propose in place of the purpose of the present invention is intended to overcome existing pressure regulator above shortcomings before a kind of valve under-voltage from
Dynamic close pressure regulator, on the gas transmission line that it is particularly suitable for be fitted to " general user ", when owing of ductwork pressure as little as setting
During pressure value, it can be automatically switched off stopping supply, ductwork pressure normally after can automatically turn on reset again and recover supply operation in time,
The management control ability to gas line network " voltage-regulation voltage-stabilization, allotment supply " for the gas company can effectively be lifted.
The purpose of the present invention is achieved by the following technical solution:
Under-voltage auto-closing pressure regulator before a kind of valve proposed by the present invention, it includes being connected to input supervisor, output supervisor
Main valve, the homophony bellows being installed on main valve and pilot valve, be fitted with valve seat, cage type valve pocket, valve element, valve rod and master in main valve
Adjust spring, equipped diaphragm unit is divided into upper chamber, lower chamber in homophony bellows, and valve rod is connected to diaphragm unit, pilot valve
Including pressure regulation valve body, bonnet, bottom flange, screw press, upper spring, it is equipped with throttle membrane between pressure regulation valve body and bottom flange
It is divided into throttling epicoele, throttling cavity of resorption, intracavity is fitted with lower spring under throttling, equipped tune between pressure regulation valve body and bonnet,
Pressuring film plate is divided into pressure regulation air cavity, and pressure regulating axis two ends are connected to voltage regulation diaphragm, throttle membrane, be provided with and throttle in pressure regulator valve body
The air inlet of the venthole that epicoele communicates and equipped throttling valve forms throttling pressure regulation air passage structure, connects in air inlet position and installs
Pressure regulation air inlet pipe, is connected and installed with the pressure regulation escape pipe communicating with the lower chamber of homophony bellows, in homophony bellows at venthole
On be connected with pressure pipe, return duct after the homophony communicating respectively with upper chamber, lower chamber, under bottom flange bottom is connected with and throttles
Pressure pipe after the throttling that chamber communicates, pressure pipe after pressure pipe after homophony, throttling, return duct be communicated in output supervisor it is characterised in that: defeated
Enter pressure input pipe and under-voltage closing control device before being connected and installed between supervisor and pressure regulation air inlet pipe, under-voltage closing control device includes
Application valve body, the control valve seat being installed on application valve body, application valve cover and control shaft, join between application valve body and control valve seat
Pressure epicoele, front pressure chamber before before dress, pressuring film plate is divided into, pressing spring before front pressure intracavity is fitted with, in application valve body and control
Between valve gap, equipped control diaphragm is divided into control epicoele, controls cavity of resorption, and the two ends of control shaft are connected to front pressuring film plate, control film
Piece, on controlling, intracavity is fitted with and is supported on the control spring controlling diaphragm and wedge, is fitted to the control screw rod of application valve cover
Top pressure forms closing control structure in wedge, is provided with and the importing air flue controlling cavity of resorption to communicate, derivation gas in application valve body
Road, is fitted to and imports controlling valve and being flush-mounted in the sealing ring formation keying valve controlling the silastic material of diaphragm to make of air flue
Mouth structure, the output that described pressure regulation air inlet pipe is connected and installed in the derivation air flue of application valve body connects in the hole, front pressure input pipe
The input being connected and installed in the importing air flue of application valve body connects in the hole, and the inlet end of front pressure input pipe is connected to input supervisor,
It is connected and installed with the front pressure pipe communicating with front pressure chamber in control valve seat bottom, before the inlet end of front pressure pipe is connected to, pressure inputs
Pipe.It is significantly structurally characterized in that: it is to be further added by equipped one in the pilot valve inlet end of existing indirect-action type pressure regulator
Under-voltage closing control device, makes the Pressure Fluctuation Signal of gas line network input pilot valve again after first passing around under-voltage closing control device
Interior, pressure of gas line network higher than set under-voltage value in the range of fluctuate when, you can by pilot valve to be installed on gas transmission supervisor
Main valve carries out normal voltage-regulation voltage-stabilization operation, and when pressure of gas line network as little as sets under-voltage value, under-voltage closing control device can be certainly
Row close and the pressure regulation source of the gas of fast shut-off pilot valve and make pressure regulator pressure out of hand, you can realize being automatically switched off main valve and stop
Only " general user " supplies and concentrates the limited source of the gas of allotment to be used for guaranteeing the goal of the invention that " key responsible consumer " supplies.?
Pressure of gas line network recovers to during higher than setting under-voltage value, and under-voltage closing control device can voluntarily open reset to pilot valve input again
Pressure regulation source of the gas, makes pressure regulator regain control pressure, you can fast quick-recovery pressure regulator normal voltage-regulation voltage-stabilization working condition.
The present invention have as follows project substantive distinguishing features and marked improvement:
The present invention has initiated under-voltage auto-closing pressure regulator before the valve that one kind is installed on " general user " gas transmission line,
It is to be equipped with under-voltage closing control device and be used as to automatically turn on or close pilot valve in the pilot valve inlet end of existing pressure regulator
The control device of pressure regulation signal source of the gas, it be by ductwork pressure fluctuation pressure regulation signal source of the gas first after under-voltage closing control device again
Enter in pilot valve, in the setting under-voltage value that pressure of gas line network is higher than under-voltage closing control device, under-voltage closing control device is
It is in opening, pilot valve can carry out normal voltage-regulation voltage-stabilization operation to main valve after obtaining pressure regulation signal source of the gas, works as gas transmission
When ductwork pressure as little as sets under-voltage value, under-voltage closing control device can voluntarily close and shut off pressure regulation signal source of the gas makes pressure regulator lose
Control pressure is gone to close, you can quick closedown main valve stops " general user " and supplies and concentrate allotment source of the gas to ensure " key
The supply demand of property responsible consumer ".Show through on probation: the present invention has that structure is simple and direct, produce easily, low cost of manufacture, peace
Fill that easy to use, automated management degree is high, safe and reliable to operation, long working life outstanding advantages, to lifting city further
There is obvious technique effect gas company of city to the regulatory level of gas line network " voltage-regulation voltage-stabilization, allotment supply ".
Brief description
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 under-voltage closing control device of the present invention, before being illustrated in setting in application valve body
Voltage-controlled system opens and closes the schematic diagram of valve mouth structure.
Fig. 3 is the structural representation of the pilot valve of the present invention.
Description of symbols in accompanying drawing:
1 is main valve, and 2 is input supervisor, and 3 is hollow arrow, and 4 is solid arrow, and 5 is front pressure pipe, and 6 is front pressure input pipe, 7
For pressure regulation escape pipe, 8 is pressure regulation air inlet pipe, and 9 is lower chamber, and 10 is homophony bellows, and 11 is upper chamber, and 12 is diaphragm unit, 13
For pressure pipe after homophony, 14 is pressure pipe after throttling, and 15 is return duct, and 16 is homophony spring, and 17 is valve rod, and 18 is cage type valve pocket, 19
For valve element, 20 is valve seat, and 21 is main pressure regulator valve mouth, and 22 is output supervisor, and 23 is wedge, and 24 is to control spring, and 25 is on controlling
Chamber, 26 is to control diaphragm, and 27 is to control valve, and 28 is input connecting hole, and 29 is to import air flue, and 30 is front pressure chamber, and 31 is front
Pressing spring, 32 is control valve seat, and 33 is front pressuring film plate, and 34 is front pressure epicoele, and 35 is output connecting hole, and 36 is application valve body, 37
For deriving air flue, 38 is to control cavity of resorption, and 39 is control shaft, and 40 is sealing ring, and 41 is application valve cover, and 42 is to control screw rod, and 43 are
Bonnet, 44 is air inlet, and 45 is pressure regulation valve body, and 46 is throttling valve, and 47 is throttle membrane, and 48 is lower spring, and 49 is lower valve
Lid, 50 is throttling cavity of resorption, and 51 is throttling epicoele, and 52 is venthole, and 53 is pressure regulating axis, and 54 is pressure regulation air cavity, and 55 is voltage regulation diaphragm,
56 is upper spring, and 57 is screw press.
Specific embodiment
Further describe embodiments of the invention below in conjunction with the accompanying drawings:
Under-voltage auto-closing pressure regulator before a kind of valve, it mainly by main valve 1, pilot valve zh, under-voltage closing control device qk and
Front pressure pipe 5, front pressure input pipe 6, pressure regulation air inlet pipe 8, pressure regulation escape pipe 7, pressure pipe 13 after homophony, pressure pipe 14, return duct after throttling
15 compositions, are fitted with valve seat 20, cage type valve pocket 18, valve element 19, valve rod 17 and homophony spring 16 in main valve 1, fixing on main valve 1
Homophony bellows 10 is installed, equipped diaphragm unit 12 is divided into upper chamber 11, lower chamber 9 in homophony bellows 10, valve rod 17 upper
End is connected to diaphragm unit 12.Described pilot valve zh include 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 section
Stream epicoele 51, throttling cavity of resorption 50, described lower spring 48 is fitted in throttling cavity of resorption 50 and is supported on throttle membrane 47, in bottom flange 49
Bottom is connected with pressure pipe 14 after the throttling communicating with the cavity of resorption 50 that throttles, and after described homophony, pressure pipe 13, return duct 15 are fixedly connected
It is installed on homophony bellows 10 and be connected with upper chamber 11, lower chamber 9 respectively, equipped between pressure regulation valve body 45 and bonnet, 43
Voltage regulation diaphragm 55 is divided into pressure regulation air cavity 54, and pressure regulating axis 53 two ends are connected to voltage regulation diaphragm 55, throttle membrane 47, in pressure regulation valve body
It is provided with the venthole 52 communicating with the epicoele 51 that throttles and the air inlet 44 formation throttling pressure regulation being fitted with throttling valve 46 in 45
Air passage structure, described pressure regulation air inlet pipe 8 connects the entrance point being fitted to air inlet 44, and pressure regulation escape pipe 7 connection is fitted to out
The port of export of pore 52, the other end of pressure regulation escape pipe 7 is fixedly connected and is installed on homophony bellows 10 and is connected with lower chamber 9.
Described under-voltage closing control device qk include application valve body 36, the control valve seat 32 being installed on application valve body 36, application valve cover 41,
Control shaft 39, control screw rod 42, wedge 23, control spring 24 and front pressing spring 31, application valve body 36 and application valve cover 41 it
Between equipped control diaphragm 26 to be divided into control epicoele 25, control cavity of resorption 38, described control spring 24 is fitted to control epicoele 25
Interior and be supported between control diaphragm 26 and wedge 23, become with application valve cover 41 control screw rod 42 top pressure of screw thread fitting configuration in
Wedge 23 forms closing control structure, is provided with and the importing air flue 29 controlling cavity of resorption 38 to communicate, derivation in application valve body 36
Air flue 37, is fitted to the control valve 27 importing in air flue 29 and is opened with ring of silicone rubber,sealing 40 formation being flush-mounted in control diaphragm 26
Valve closing mouth structure, described pressure regulation air inlet pipe 8 is connected and installed in the output connecting hole 35 deriving air flue 37, front pressure input pipe 6
It is connected and installed in the input connecting hole 28 importing air flue 29, pressuring film plate before being equipped between application valve body 36 and control valve seat 32
33 are divided into front pressure epicoele 34, front pressure chamber 30, and the front pressing spring 31 being fitted in front pressure chamber 30 is supported on front pressuring film plate 33,
The two ends of described control shaft 39 be connected to front pressuring film plate 33, control diaphragm 26, control valve seat 32 bottom be connected and installed with front
The front pressure pipe 5 that pressure chamber 30 communicates, the inlet end of front pressure pipe 5 presses input pipe 6 before being connected to.It is to be installed as follows
Operation: according to the relevant regulations of " gas user categorized support grade ", on the gas transmission line of " the general user " that choose
Carry out installment work, main valve 1 is fixedly connected is installed between input supervisor 2, output supervisor 22 first, you can formed such as hollow
Shown in arrow 3, the 22 air delivering pipeline passages downstream supplying are responsible for through main valve 1 to output by input supervisor 2, then press input by front
The inlet end of pipe 6 is fixedly connected on the input supervisor 2 of main valve 1 front end, by pressure pipe 14, return duct after pressure pipe after homophony 13, throttling
15 are fixedly connected the output supervisor 22 being installed on main valve 1 rear end, you can formed as shown in solid arrow 4, by input, supervisor 2 is premenstrual
Pressure input pipe 6, under-voltage closing control device qk, pressure regulation air inlet pipe 8, pilot valve zh, pressure regulation escape pipe 7, the therapeutic method to keep the adverse QI flowing downwards of homophony bellows 10
22 gas line network upstream pressure fluctuation pressure regulation signal source of the gas passage, this " pressure regulation signal source of the gas passage " are responsible in room 9 to output
Can be subject to be imported by front pressure pipe 5 simultaneously upstream pressure in pressure chamber 30 before under-voltage closing control device qk, by pressure pipe after throttling 14,
After homophony pressure pipe 13 be directed respectively into pilot valve zh throttle cavity of resorption 50, downstream pressure in the upper chamber 11 of homophony bellows 10 common
Effect.
As follows under-voltage closing control device qk is carried out with the setting operation of " under-voltage value before valve ": in under-voltage closing control
During device qk factory testing, the supply gas pressure that specified according to " transmission ＆ distribution send civil gas management rule of operation " and " general user " is closed
The technical requirements of gas transmission line " under-voltage value before valve ", preset " before valve to under-voltage closing control device qk on pressure testers
Under-voltage value ".I other words, the front pressure input pipe 6 of under-voltage closing control device qk is connected to pressure testers, starts pressure testers
Into under-voltage closing control device qk, input pressure is the compressed gas of " under-voltage value before valve ", more slowly rotates control screw rod 42 gradually
Increase and control spring 24 to the pressure controlling diaphragm 26, sealing ring 40 closing control be able to be made during controlling diaphragm 26 to move down
During valve 27 close port processed, sealing controls the position of screw rod 42, that is, complete " under-voltage before valve to under-voltage closing control device qk
The setting operation of value ".It should be understood that after the output gas pressure of pressure testers is raised, in pressure chamber 30 before entrance
Gas can overcome control the former setting of spring 24 pressure upwardly front pressuring film plate 33 and pass through control shaft 39 promote control film
Piece 26 upward displacement, you can opening control valve 27 and making valve port is in opening, then gas pressure is down to " owing before valve of setting
During pressure value ", and control valve 27 can be closed make valve port to be in closed mode.Certainly, also can carry out when mounted " under-voltage value before valve "
Setting operation.
It is performed such under-voltage before normal voltage-regulation voltage-stabilization and valve closes operation:
Under-voltage auto-closing pressure regulator before valve proposed by the present invention is fixedly connected the gas transmission being installed on " general user "
On pipeline errorless on inspection after, the technology of the normal supply rated pressure being specified according to " transmission ＆ distribution send civil gas management rule of operation " will
Ask, the screw press 57 of signalman device zh is the pressure to voltage regulation diaphragm 55 for the spring 56 in scalable, by adjusting pilot valve
The throttle opening of zh internal segment gas mouth 46 come to adjust input homophony bellows 10 lower chamber 9 in signal bleed pressure, Ji Nengtong
Cross valve rod 17 shift about 19 with movable valve plug and then adjust main pressure regulator valve port 21 opening degree adjust output gas pressure,
The principle that it carries out voltage-regulation voltage-stabilization in actual moving process is: the range of pressure fluctuations in gas line network upstream is higher than under-voltage pass
When closing the under-voltage value that controller qk sets, under-voltage closing control device qk is in opening, i other words under-voltage closing control device
Front pressuring film plate 33 in qk, control diaphragm 26 in the upstream pressure that front pressure pipe 5 imports, front pressing spring 31 and can control spring 24
Make sealing ring 40 form " valve mouth structure " with control valve 27 under collective effect and be in opening.Divide three kinds of mode of operations below
The operation principle of under-voltage auto-closing pressure regulator before valve proposed by the present invention is further described:
1. the present invention is in the mode of operation of normal voltage-regulation voltage-stabilization operation: the pressure regulation of pressure oscillation before gas line network upstream valve
Signal source of the gas is to be entered the importing air flue 29 of under-voltage closing control device qk, controlled valve 27 by the premenstrual pressure input pipe 6 of input supervisor 2
Enter and control cavity of resorption 38, exported to pressure regulation air inlet pipe 8 by derivation air flue 37 again, then through in pressure regulation air inlet pipe 8 input pilot valve zh
Air inlet 44, enter throttling epicoele 51 act on throttle membrane 47, due on gas line network after warp knuckle gas mouth 46 throttling
The pressure oscillation of trip can make throttle membrane 47 be shifted over and change throttling valve 46 and the throttle opening of throttle membrane 47 and make
Pressure in throttling epicoele 51 changes with pipe network upstream pressure fluctuations.So far, you can exported with gas line network by venthole 52
Upstream pressure fluctuations and the pressure regulation signal that changes, then input the lower chamber 9 of homophony bellows 10 through pressure regulation escape pipe 7 and act on film
Piece assembly 12, you can promote diaphragm unit 12 to move up and down with gas line network upstream pressure fluctuations, then carried by valve rod 17
Movable valve plug shifts about 19 and then adjusts the opening degree of main pressure regulator valve port 21, so far, you can realize gas line network is carried out certainly
Dynamic pressure regulation the purpose of the combustion gas stable to downstream user output pressure confession safe handling.
2. the present invention carries out the under-voltage mode of operation closing operation before valve: when the reduced pressure of gas line network upstream is to deficient
When " under-voltage value before valve " that pressure closing control device qk sets, under-voltage closing control device qk can voluntarily close and be in cutting-off pressure-regulating signal
The working condition of source of the gas.I other words, the upstream pressure in the front pressure chamber 30 that under-voltage closing control device qk is imported by front pressure pipe 5
Be reduced to setting " under-voltage value before valve " when, front pressuring film plate 33 in under-voltage closing control device qk, control diaphragm 26 original flat
Weighing apparatus location status are destroyed, and control spring 24 can promote and control diaphragm 26 to move down and by the sealing being flush-mounted in control diaphragm 26
Ring 40 closing controls valve 27 so that " valve mouth structure " is closed, and the closing due to under-voltage closing control device 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, it is fitted to main valve 1
Interior homophony spring 16 can promote valve element 19 to move down closing main pressure regulator valve port 21 therewith, so far, you can realize quick closedown main valve 1
Stop the goal of the invention supplying to " general user " and concentrating allotment source of the gas to supply to " key responsible consumer ".
3. the present invention carries out automatically turning on resetting and recovers to supply the mode of operation of operation: when the pressure of gas line network upstream is extensive
When being normally elevated above " under-voltage value before valve " that set again, under-voltage closing control device qk can be in unlatching shape by self-resetting again.I.e.
It is to say, the upstream pressure in pressure chamber 30 before under-voltage closing control device qk is imported by front pressure pipe 5 and rises above " before valve of setting
During under-voltage value ", the boosting gas in front pressure chamber 30 can promote front pressuring film plate 33 to move up and drive control by control shaft 39
Masking piece 26 with move, at this moment, be flush-mounted in control diaphragm 26 sealing ring 40 can and control valve 27 separate and make " valve port tie
Structure " is in opening again.So far, can swim on the net to input pipe in pilot valve zh after under-voltage closing control device qk unlatching
Pressure regulation signal source of the gas, as described above, can regain pressure regulation signal source of the gas to promote diaphragm unit in the lower chamber 9 of homophony bellows 10
12 shift up and pass through valve rod 17 band movable valve plug 19 with move, you can open main valve 1 and resetted, fast quick-recovery is to " one
As property user " supply operation.
Obviously, above-described embodiment is only that by one of mode of technical solution of the present invention, claimed
Scope be not limited only to above-described embodiment, also should include by those of ordinary skill in the art according to the present invention technology
The alternate manner that scheme can change.
Claims (2)
1. under-voltage auto-closing pressure regulator before a kind of valve, it includes being connected to input supervisor (2), the main valve of output supervisor (22)
(1), it is installed on homophony bellows (10) and the pilot valve (zh) of main valve (1), be fitted with valve seat (20), cage type valve in main valve (1)
Set (18), valve element (19), valve rod (17) and homophony spring (16), in homophony bellows (10), equipped diaphragm unit (12) is divided into
Upper chamber (11), lower chamber (9), valve rod (17) is connected to diaphragm unit (12), pilot valve (zh) include pressure regulation valve body (45), on
Valve gap (43), bottom flange (49), screw press (57), upper spring (56), join between pressure regulation valve body (45) and bottom flange (49)
Dress throttle membrane (47) is divided into throttling epicoele (51), throttling cavity of resorption (50), is fitted with lower spring in throttling cavity of resorption (50)
(48), between pressure regulation valve body (45) and bonnet, (43) be equipped with voltage regulation diaphragm (55), pressure regulation valve body (45), bonnet, (43) and
Voltage regulation diaphragm (55) forms pressure regulation air cavity (54), and pressure regulating axis (53) two ends are connected to voltage regulation diaphragm (55), throttle membrane (47), adjusts
It is provided with the venthole (52) communicating with the epicoele that throttles (51) and the air inlet of equipped throttling valve (46) in pressure valve body (45)
(44) form throttling pressure regulation air passage structure, connect at air inlet (44) place and pressure regulation air inlet pipe (8) is installed, at venthole (52) place even
Connect and the pressure regulation escape pipe (7) being communicated with the lower chamber (9) of homophony bellows (10) is installed, homophony bellows (10) is connected with point
Pressure pipe (13), return duct (15) after the homophony not communicated with upper chamber (11), lower chamber (9), are connected in bottom flange (49) bottom
Have and pressure pipe (14) after throttling cavity of resorption (50) throttling that communicates, pressure pipe (14), return duct (15) after pressure pipe (13) after homophony, throttling
Be communicated in output supervisor (22) it is characterised in that: input supervisor (2) and pressure regulation air inlet pipe (8) between be connected and installed with front pressure
Input pipe (6) and under-voltage closing control device (qk), under-voltage closing control device (qk) includes application valve body (36), is installed on control valve
The control valve seat (32) of body (36), application valve cover (41) and control shaft (39), application valve body (36) and control valve seat (32) it
Between equipped before pressuring film plate (33) be divided into before pressure epicoele (34), front pressure chamber (30), be fitted with front pressure in front pressure chamber (30)
Spring (31), between application valve body (36) and application valve cover (41) equipped control diaphragm (26) be divided into control 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), in control epicoele (25)
It is fitted with and is supported on the control spring (24) controlling diaphragm (26) and wedge (23), be fitted to the control screw rod of application valve cover (41)
(42) top pressure forms closing control structure in wedge (23), is provided with and communicates with controlling cavity of resorption (38) in application valve body (36)
Import air flue (29), derive air flue (37), be fitted to import air flue (29) control valve (27) be flush-mounted in control diaphragm
(26) sealing ring (40) forms and opens and closes valve mouth structure, and described pressure regulation air inlet pipe (8) is connected and installed in application valve body (36)
Derive in the output connecting hole (35) of air flue (37), front pressure input pipe (6) is connected and installed in the importing air flue of application valve body (36)
(29), in input connecting hole (28), the inlet end of front pressure input pipe (6) is connected to input supervisor (2), in control valve seat (32)
Bottom is connected and installed with the front pressure pipe (5) communicating with front pressure chamber (30), and the inlet end of front pressure pipe (5) presses input pipe before being connected to
(6).
2. before valve according to claim 1 under-voltage auto-closing pressure regulator it is characterised in that: described sealing ring (40) is
Made using silastic material.
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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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| Application Number | Priority Date | Filing Date | Title |
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| CN201410760166.3A CN104482283B (en) | 2014-12-12 | 2014-12-12 | Upstream under-pressure automatic closing pressure regulator |
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| CN104482283A CN104482283A (en) | 2015-04-01 |
| CN104482283B true 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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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN112728180B (en) * | 2021-01-22 | 2022-11-04 | 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 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1253106B (en) * | 1991-07-04 | 1995-07-10 | Pietro Fiorentini Spa | PRESSURE REGULATOR FOR GAS. |
| CN2138807Y (en) * | 1992-10-12 | 1993-07-21 | 大庆石油管理局油田建设设计研究院 | Automatic pressure difference adjuster |
| IT1315469B1 (en) * | 2000-07-17 | 2003-02-18 | Pietro Fiorentini Spa | PRESSURE REGULATOR FOR DIGAS TRANSPORT AND DISTRIBUTION SYSTEMS. |
| CN201016405Y (en) * | 2007-03-26 | 2008-02-06 | 袁勇 | Indirectly-acting type pressure regulator |
| CN102705552B (en) * | 2012-06-13 | 2013-11-06 | 章秀容 | Pressure regulator with excessive flow auto-closing function by setting maximum flow |
| CN202884159U (en) * | 2012-09-07 | 2013-04-17 | 乐山川天燃气输配设备有限公司 | Ultrahigh pressure indirect action type pressure regulator |
| CN204420280U (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 before valve |
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