CN107246498A - A kind of water system pressure-reducing valve double guide's valve control systems and control method - Google Patents
A kind of water system pressure-reducing valve double guide's valve control systems and control method Download PDFInfo
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- CN107246498A CN107246498A CN201710619113.3A CN201710619113A CN107246498A CN 107246498 A CN107246498 A CN 107246498A CN 201710619113 A CN201710619113 A CN 201710619113A CN 107246498 A CN107246498 A CN 107246498A
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- valve
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- pressure
- pressure relief
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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
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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
- F16K1/32—Details
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention discloses a kind of water system pressure-reducing valve double guide's valve control systems and control method, it includes main valve, pressurising pilot valve and pressure relief pilot-actuated valve；The equal feedback reduced pressure valve main valve water outlet pipe pressure of two pilot valves, the setting value of pressurising pilot valve is more than pressure relief pilot-actuated valve, when main valve water outlet pipe pressure is more than the operating pressure setting value of pressurising pilot valve, and the aperture of main valve disc is by reducing to reduce downstream pressure；When main valve water outlet pipe pressure is less than the operating pressure setting value of pressure relief pilot-actuated valve, the aperture of main valve disc is by increasing to improve downstream pressure.Most at last the pressure stability of pressure-reducing valve main valve outlet pipe between the operating pressure setting value of two pilot valves.
Description
Technical field
The invention belongs to hydraulic valve field, more particularly to a kind of water system pressure-reducing valve double guide's valve control systems and control
Method processed.
Background technology
The usual only one of which pilot valve of control system of existing water system pressure-reducing valve, pilot valve feedback reduced pressure valve master
Valve water outlet pipe pressure is simultaneously compared with spring setting value, so that adjustment pilot valve leads to the flow of main valve outlet pipe in real time, and then is adjusted
Whole main valve control cavity pressure and control bound aperture, just can so make main valve outlet pipe pressure stability near setting value.It is this
Pilot valve in control system is constantly in valve shaft and excessively stream sealing surface in over-current state, longtime running pilot valve etc. may
By cavitation erosion, make its can not normal work, and influence the stable operation of pressure-reducing valve.
The content of the invention
It is an object of the invention to provide a kind of water system pressure-reducing valve double guide's valve control systems and control method, this
System is mainly made up of pressurising pilot valve, pressure relief pilot-actuated valve and control piper.The equal feedback reduced pressure valve main valve of two pilot valves goes out
Siphon pressure, the setting value of pressurising pilot valve is more than pressure relief pilot-actuated valve, when main valve water outlet pipe pressure is more than the dynamic of pressurising pilot valve
When making pressure set points, the aperture of main valve disc is by reducing to reduce downstream pressure；When main valve water outlet pipe pressure is less than pressure release guide
During the operating pressure setting value of valve, the aperture of main valve disc is by increasing to improve downstream pressure.Most pressure-reducing valve main valve outlet pipe at last
Pressure stability between the operating pressure setting value of two pilot valves.
In order to realize above-mentioned technical characteristic, the object of the present invention is achieved like this：A kind of water system pressure-reducing valve is used
Double guide's valve control systems, it includes main valve, pressurising pilot valve and pressure relief pilot-actuated valve；
The main valve water inlet pipe of the main valve is connected by communicating pipe with the pressurising pilot valve water inlet pipe of pressurising pilot valve, the master
Pressurising pilot valve pressure nozzle and the pressure release of pressure relief pilot-actuated valve of the main valve outlet pipe of valve by communicating pipe simultaneously with pressurising pilot valve
Pilot valve outlet pipe is connected；
The pressurising pilot valve outlet pipe of pressurising pilot valve main valve control chamber simultaneously with main valve and the pressure release of pressure relief pilot-actuated valve
Pilot valve water inlet pipe is connected.
Main valve diaphragm is installed in the middle part of the valve rod of the main valve, main valve disc is installed in the end of valve rod, the main valve
Main valve diaphragm upper cavity formation main valve control chamber, the main valve disc is arranged between main valve water inlet pipe and main valve outlet pipe.
The pressurising pilot valve includes pressurising guide's valve diaphragm, and the upper cavity of the pressurising guide valve diaphragm is provided with pressurising
Adjustment bolt for adjusting spring force, the pressurising are installed at the top of guide's valve spring, the pressurising guide valve spring
The lower surface of guide's valve diaphragm is provided with pressurising pilot valve and dammed disk, and the pressurising pilot valve dams disk and pressurising pilot valve water outlet
Pipe is engaged；Pressurising guide's valve diaphragm lower cavity inside the pressurising pilot valve is communicated with pressurising pilot valve pressure nozzle；Institute
State pressurising pilot valve outlet pipe and pressurising pilot valve needle-valve is installed between cavity that pressurising pilot valve dams where disk.
The pressure relief pilot-actuated valve includes pressure relief pilot-actuated valve barrier film, and the upper cavity of the pressure relief pilot-actuated valve barrier film is provided with pressure release
Adjustment bolt for adjusting spring force, the pressure release are installed at the top of guide's valve spring, the pressure relief pilot-actuated valve spring
The lower surface of guide's valve diaphragm is provided with pressure relief pilot-actuated valve and dammed disk；Under pressure relief pilot-actuated valve barrier film inside the pressure relief pilot-actuated valve
Portion's cavity is communicated with pressure relief pilot-actuated valve outlet pipe；The cavity that the pressure relief pilot-actuated valve water inlet pipe and pressure relief pilot-actuated valve dam where disk
Between pressure relief pilot-actuated valve needle-valve is installed.
Using control method of any one water system pressure-reducing valve with double guide's valve control systems, it includes following step
Suddenly：
Step1：Adjustment bolt at the top of pressurising pilot valve and pressure relief pilot-actuated valve is adjusted, makes the operating pressure setting value of pressurising pilot valve
P1 is more than pressure relief pilot-actuated valve barrier film 3b operating pressure setting value P2；
Step2：When the pressure of the main valve outlet pipe of main valve is more than P1, the pressurising pilot valve disk that dams is moved up, and makes pressurising first
Pilot valve water inlet pipe is connected with pressurising pilot valve outlet pipe；Pressure relief pilot-actuated valve dams disk in topmost simultaneously, and pressure relief pilot-actuated valve enters
Water pipe disconnects with pressure relief pilot-actuated valve outlet pipe；Now main valve water inlet pipe will make by pressurising pilot valve to main valve control chamber water-filling
Main valve disc is moved down, so that the pressure reduction of main valve outlet pipe, until less than P1；
Step3：When the pressure of main valve outlet pipe is less than P2, pressurising pilot valve dams disk in bottom, makes pressurising pilot valve
Water inlet pipe disconnects with pressurising pilot valve outlet pipe；While pressure relief pilot-actuated valve dams, disk is moved down, and makes pressure relief pilot-actuated valve water inlet pipe
Connected with pressure relief pilot-actuated valve outlet pipe；Now main valve control chamber will make main valve by pressure relief pilot-actuated valve to main valve outlet pipe draining
Disk is moved up, so that the pressure increase of main valve outlet pipe, until more than P2；
Step4：By Step1- Step3 self-regulating processes, the pressure stability of main valve outlet pipe can be made between P1 and P2,
Now pressurising pilot valve dams disk in bottom, and pressurising pilot valve water inlet pipe disconnects with pressurising pilot valve outlet pipe；Let out simultaneously
Pressure pilot valve dams disk in topmost, and pressure relief pilot-actuated valve water inlet pipe disconnects with pressure relief pilot-actuated valve outlet pipe, such main valve control
Chamber neither water-filling nor draining, main valve disc will maintain aperture constant；
Step5：The aperture of pressurising pilot valve needle-valve and pressure relief pilot-actuated valve needle-valve is adjusted, filling for main valve control chamber can be adjusted respectively
Water, drainage speed, so as to adjust the reaction speed of main valve.
The method have the advantages that：
1st, double guide's valve control systems for water system pressure-reducing valve, mainly by pressurising pilot valve, pressure relief pilot-actuated valve and control
Tubulation road is constituted, the equal feedback reduced pressure valve main valve water outlet pipe pressure of two pilot valves, and the setting value of pressurising pilot valve is more than pressure release elder generation
Pilot valve, when main valve water outlet pipe pressure is more than the operating pressure setting value of pressurising pilot valve, the aperture of main valve disc is by reducing to drop
Low downstream pressure；When main valve water outlet pipe pressure is less than the operating pressure setting value of pressure relief pilot-actuated valve, the aperture of main valve disc will increase
It is big to improve downstream pressure；Most operating pressure setting value of the pressure stability of pressure-reducing valve main valve outlet pipe in two pilot valves at last
Between.
2nd, by described double guide's valve control systems, when being run under stable operating mode, the pressure of main valve outlet pipe will
Steadily in the long term between P1, P2, now main valve control chamber 1a is in inside closed state, two pilot valves without excessively stream, guide
Valve shaft and excessively stream sealing surface in valve etc. will be less likely to occur cavitation erosion, thus with more preferable stability and longer use longevity
Life.
3rd, the operating pressure setting value P1 of pressurising pilot valve is higher than the operating pressure setting value P2 of pressure relief pilot-actuated valve, works as main valve
When water outlet pipe pressure is higher than P1, main valve water inlet pipe is by pressurising pilot valve to main valve control chamber water-filling；When main valve water outlet pipe pressure
During less than P2, main valve control chamber is by pressure relief pilot-actuated valve to main valve outlet pipe draining；When main valve water outlet pipe pressure is less than P1 but height
When P2, main valve control chamber neither water-filling nor draining.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is control system schematic diagram of the invention.
In figure：1st, main valve；1a, main valve control chamber；1b, main valve diaphragm；1c, main valve disc；1d, main valve water inlet pipe；1e, main valve
Outlet pipe；
2nd, pressurising pilot valve；2a, pressurising guide's valve spring；2b, pressurising guide's valve diaphragm；2c, pressurising pilot valve pressure nozzle；2d、
Pressurising pilot valve water inlet pipe；2e, pressurising pilot valve dam disk；2f, pressurising pilot valve needle-valve；2g, pressurising pilot valve outlet pipe；
3rd, pressure relief pilot-actuated valve；3a, pressure relief pilot-actuated valve spring；3b, pressure relief pilot-actuated valve barrier film；3c, pressure relief pilot-actuated valve outlet pipe；3d、
Pressure relief pilot-actuated valve dams disk；3e, pressure relief pilot-actuated valve water inlet pipe；3f, pressure relief pilot-actuated valve needle-valve.
Embodiment
Embodiments of the present invention are described further below in conjunction with the accompanying drawings.
Embodiment 1：
As shown in figure 1, a kind of water system pressure-reducing valve pair guide's valve control systems, it includes main valve 1, the and of pressurising pilot valve 2
Pressure relief pilot-actuated valve 3；
Further, the main valve water inlet pipe 1d of the main valve 1 passes through communicating pipe and the pressurising pilot valve water inlet pipe of pressurising pilot valve 2
2d is connected, the pressurising pilot valve pressure nozzle of the main valve outlet pipe 1e of the main valve 1 by communicating pipe simultaneously with pressurising pilot valve 2
2c is connected with the pressure relief pilot-actuated valve outlet pipe 3c of pressure relief pilot-actuated valve 3；
Further, the pressurising pilot valve outlet pipe 2g of the pressurising pilot valve 2 is simultaneously with the main valve control chamber 1a of main valve 1 and letting out
The pressure relief pilot-actuated valve water inlet pipe 3e of pressure pilot valve 3 is connected.
Further, main valve diaphragm 1b is installed in the middle part of the valve rod of the main valve 1, main valve disc is installed in the end of valve rod
1c, the formation of main valve diaphragm 1b upper cavities main valve the control chamber 1a, the main valve disc 1c of the main valve 1 are arranged on main valve water inlet pipe 1d
Between main valve outlet pipe 1e.
Further, the pressurising pilot valve 2 includes pressurising guide's valve diaphragm 2b, and the pressurising guide valve diaphragm 2b's is upper
Cavity is provided with the top of pressurising guide's valve spring 2a, the pressurising guide valve spring 2a and is provided with for adjusting spring force
Adjustment bolt, the lower surface of the pressurising guide valve diaphragm 2b is provided with pressurising pilot valve and dammed disk 2e, the pressurising pilot valve
The disk 2e that dams is engaged with pressurising pilot valve outlet pipe 2g；Pressurising guide valve diaphragm 2b bottoms inside the pressurising pilot valve 2
Cavity is communicated with pressurising pilot valve pressure nozzle 2c；The pressurising pilot valve outlet pipe 2g and pressurising pilot valve dam where disk 2e
Pressurising pilot valve needle-valve 2f is installed between cavity.
Further, the pressure relief pilot-actuated valve 3 includes pressure relief pilot-actuated valve barrier film 3b, and the pressure relief pilot-actuated valve barrier film 3b's is upper
Cavity is provided with the top of pressure relief pilot-actuated valve spring 3a, the pressure relief pilot-actuated valve spring 3a and is provided with for adjusting spring force
Adjustment bolt, the lower surface of the pressure relief pilot-actuated valve barrier film 3b is provided with pressure relief pilot-actuated valve and dammed disk 3d；The pressure relief pilot-actuated valve 3
Internal pressure relief pilot-actuated valve barrier film 3b lower cavities are communicated with pressure relief pilot-actuated valve outlet pipe 3c；The pressure relief pilot-actuated valve water inlet pipe 3e
Pressure relief pilot-actuated valve needle-valve 3f is installed between the cavity that dams where disk 3d of pressure relief pilot-actuated valve.
Embodiment 2：
Illustrated using diaphragm pressure reduction valve as main valve 1, the situation of piston type decompression is similar.There is master in main valve control chamber 1a
Valve diaphragm 1b, main valve disc 1c can be moved up and down with main valve diaphragm 1b.
Further, the top adjustment bolt of pressurising pilot valve 2 can adjust pressurising guide's valve spring 2a pre-pressing force, so that
Adjust the operating pressure setting value of pressurising pilot valve；It can pass through pressurising pilot valve pressure nozzle 2c's under pressurising guide's valve diaphragm 2b
Sense main valve outlet pipe 1e pressure, and be compared with setting value.When induction pressure is less than setting value, pressurising pilot valve is cut
Flow table 2e is in bottom, and pressurising pilot valve water inlet pipe 2d will disconnect with pressurising pilot valve outlet pipe 2g；When induction pressure is higher than
During setting value, pressurising pilot valve dams disk 2e in moving up, and pressurising pilot valve water inlet pipe 2d will be with pressurising pilot valve water outlet
Pipe 2g is connected.Pressurising pilot valve needle-valve 2f is used for the flow of inlet water for adjusting pressurising pilot valve water inlet pipe 2e.
Further, the structure of pressure relief pilot-actuated valve 3 is similar with pressurising pilot valve 2, but has two differences.One is pressure release
Pilot valve outlet pipe 3c is both the outlet pipeline of pressure relief pilot-actuated valve 3, while also to feedback main valve below pressure relief pilot-actuated valve barrier film 3b
Outlet pipe 1e pressure.Two be that pressure relief pilot-actuated valve dams disk 3d pressure relief pilot-actuated valve water inlet pipe 3e and pressure relief pilot-actuated valve at the top
Pressure nozzle 3c is disconnected, and both can be connected by moving down, and this point and pressurising pilot valve the disk 2d that dams are opposite.
Further, the pressurising pilot valve 2 and pressure relief pilot-actuated valve 3 can be replaced by the pilot valve of the similar other forms of structure
Generation, as long as its manner of execution is：When the induction pressure of pressurising pilot valve is higher than its operating pressure setting value, its inlet tube and outlet tube
Road is connected, otherwise is disconnected；And when the induction pressure of pressure relief pilot-actuated valve is less than its operating pressure setting value, its inlet and outlet pipe
Connection, on the contrary disconnect.
Further, control system can increase the annexes such as water inlet main valve, water outlet main valve and filter as needed；Main valve control
It can increase by a valve on chamber 1a processed connecting line, for locking main valve aperture.
Embodiment 3：
Using control method of any one water system pressure-reducing valve with double guide's valve control systems, it comprises the following steps：
Step1：Pressurising pilot valve 2 and the top adjustment bolt of pressure relief pilot-actuated valve 3 are adjusted, the operating pressure of pressurising pilot valve is set
Value P1 is more than pressure relief pilot-actuated valve barrier film 3b operating pressure setting value P2；
Step2：When the main valve outlet pipe 1e of main valve 1 pressure is more than P1, the pressurising pilot valve disk 2e that dams is moved up, and makes to fill
Pressure pilot valve water inlet pipe 2d is connected with pressurising pilot valve outlet pipe 2g；Pressure relief pilot-actuated valve dams disk 3d in topmost simultaneously, lets out
Pilot valve water inlet pipe 3e and pressure relief pilot-actuated valve outlet pipe 3c is pressed to disconnect；Now main valve water inlet pipe 1d will by pressurising pilot valve 2 to
Main valve control chamber 1a water-fillings, move down main valve disc 1c, so that main valve outlet pipe 1e pressure reduction, until less than P1；
Step3：When main valve outlet pipe 1e pressure is less than P2, pressurising pilot valve dams disk 2e in bottom, makes pressurising first
Pilot valve water inlet pipe 2d and pressurising pilot valve outlet pipe 2g disconnects；While pressure relief pilot-actuated valve dams, disk 3d is moved down, and makes pressure release first
Pilot valve water inlet pipe 3e is connected with pressure relief pilot-actuated valve outlet pipe 3c；Now main valve control chamber 1a will be by pressure relief pilot-actuated valve 2 to main valve
Outlet pipe 1e drainings, move up main valve disc 1c, so that main valve outlet pipe 1e pressure increase, until more than P2；
Step4：By Step1- Step3 self-regulating processes, can make main valve outlet pipe 1e pressure stability P1 and P2 it
Between, now pressurising pilot valve dams disk 2e in bottom, and pressurising pilot valve water inlet pipe 2d and pressurising pilot valve outlet pipe 2g breaks
Open；Pressure relief pilot-actuated valve dams disk 3d in topmost simultaneously, and pressure relief pilot-actuated valve water inlet pipe 3e and pressure relief pilot-actuated valve outlet pipe 3c breaks
Open, such main valve control chamber 1a neither water-filling nor draining, main valve disc 1c will maintain aperture constant；
Step5：Pressurising pilot valve needle-valve 2f and pressure relief pilot-actuated valve needle-valve 3f aperture is adjusted, main valve control chamber 1a can be adjusted respectively
Water-filling, drainage speed, so as to adjust the reaction speed of main valve.
Above-described embodiment is used for illustrating the present invention, rather than limits the invention, the present invention spirit and
In scope of the claims, any modifications and changes made to the present invention both fall within protection scope of the present invention.
Claims (5)
1. a kind of water system pressure-reducing valve pair guide's valve control systems, it is characterised in that：It includes main valve（1）, pressurising guide
Valve（2）And pressure relief pilot-actuated valve（3）；
The main valve（1）Main valve water inlet pipe（1d）Pass through communicating pipe and pressurising pilot valve（2）Pressurising pilot valve water inlet pipe
（2d）It is connected, the main valve（1）Main valve outlet pipe（1e）By communicating pipe simultaneously with pressurising pilot valve（2）Pressurising guide
Valve pressure nozzle（2c）And pressure relief pilot-actuated valve（3）Pressure relief pilot-actuated valve outlet pipe（3c）It is connected；
The pressurising pilot valve（2）Pressurising pilot valve outlet pipe（2g）While and main valve（1）Main valve control chamber（1a）With let out
Press pilot valve（3）Pressure relief pilot-actuated valve water inlet pipe（3e）It is connected.
2. a kind of water system pressure-reducing valve according to claim 1 pair guide's valve control systems, it is characterised in that：It is described
Main valve（1）Valve rod in the middle part of main valve diaphragm is installed（1b）, main valve disc is installed in the end of valve rod（1c）, the main valve（1）
Main valve diaphragm（1b）Upper cavity formation main valve control chamber（1a）, the main valve disc（1c）It is arranged on main valve water inlet pipe（1d）And master
Valve outlet pipe（1e）Between.
3. a kind of water system pressure-reducing valve according to claim 1 pair guide's valve control systems, it is characterised in that：It is described
Pressurising pilot valve（2）Including pressurising guide's valve diaphragm（2b）, the pressurising guide valve diaphragm（2b）Upper cavity pressurising is installed
Guide's valve spring（2a）, the pressurising guide valve spring（2a）Top adjustment bolt for adjusting spring force is installed,
The pressurising guide valve diaphragm（2b）Lower surface pressurising pilot valve be installed dammed disk（2e）, the pressurising pilot valve dams disk
（2e）With pressurising pilot valve outlet pipe（2g）It is engaged；The pressurising pilot valve（2）Internal pressurising guide's valve diaphragm（2b）Under
Portion's cavity is communicated with pressurising pilot valve pressure nozzle（2c）；The pressurising pilot valve outlet pipe（2g）Dam disk with pressurising pilot valve
（2e）Pressurising pilot valve needle-valve is installed between the cavity at place（2f）.
4. a kind of water system pressure-reducing valve according to claim 1 pair guide's valve control systems, it is characterised in that：It is described
Pressure relief pilot-actuated valve（3）Including pressure relief pilot-actuated valve barrier film（3b）, the pressure relief pilot-actuated valve barrier film（3b）Upper cavity pressure release is installed
Guide's valve spring（3a）, the pressure relief pilot-actuated valve spring（3a）Top adjustment bolt for adjusting spring force is installed,
The pressure relief pilot-actuated valve barrier film（3b）Lower surface pressure relief pilot-actuated valve be installed dammed disk（3d）；The pressure relief pilot-actuated valve（3）It is interior
The pressure relief pilot-actuated valve barrier film in portion（3b）Lower cavity is communicated with pressure relief pilot-actuated valve outlet pipe（3c）；The pressure relief pilot-actuated valve water inlet pipe
（3e）Dam disk with pressure relief pilot-actuated valve（3d）Pressure relief pilot-actuated valve needle-valve is installed between the cavity at place（3f）.
5. using control method of the claim 1-4 any one water systems pressure-reducing valve with double guide's valve control systems, it is special
Levy and be, it comprises the following steps：
Step1：Adjust pressurising pilot valve（2）And pressure relief pilot-actuated valve（3）Top adjustment bolt, makes the operating pressure of pressurising pilot valve
Setting value P1 is more than pressure relief pilot-actuated valve barrier film 3b operating pressure setting value P2；
Step2：Work as main valve（1）Main valve outlet pipe（1e）Pressure when being more than P1, pressurising pilot valve dams disk（2e）To moving up
It is dynamic, make pressurising pilot valve water inlet pipe（2d）With pressurising pilot valve outlet pipe（2g）Connection；The disk while pressure relief pilot-actuated valve dams（3d）
In topmost, pressure relief pilot-actuated valve water inlet pipe（3e）With pressure relief pilot-actuated valve outlet pipe（3c）Disconnect；Now main valve water inlet pipe（1d）
Pressurising pilot valve will be passed through（2）To main valve control chamber（1a）Water-filling, makes main valve disc（1c）Move down, so that main valve outlet pipe
（1e）Pressure reduction, until less than P1；
Step3：When main valve outlet pipe（1e）Pressure when being less than P2, pressurising pilot valve dams disk（2e）In bottom, make to fill
Press pilot valve water inlet pipe（2d）With pressurising pilot valve outlet pipe（2g）Disconnect；The disk while pressure relief pilot-actuated valve dams（3d）To moving down
It is dynamic, make pressure relief pilot-actuated valve water inlet pipe（3e）With pressure relief pilot-actuated valve outlet pipe（3c）Connection；Now main valve control chamber（1a）It will pass through
Pressure relief pilot-actuated valve（2）To main valve outlet pipe（1e）Draining, makes main valve disc（1c）Move up, so that main valve outlet pipe（1e）Pressure
Power increases, until more than P2；
Step4：By Step1- Step3 self-regulating processes, main valve outlet pipe can be made（1e）Pressure stability P1 and P2 it
Between, now pressurising pilot valve dams disk（2e）In bottom, pressurising pilot valve water inlet pipe（2d）With pressurising pilot valve outlet pipe
（2g）Disconnect；The disk while pressure relief pilot-actuated valve dams（3d）In topmost, pressure relief pilot-actuated valve water inlet pipe（3e）With pressure relief pilot-actuated valve
Outlet pipe（3c）Disconnect, such main valve control chamber（1a）Neither water-filling nor draining, main valve disc（1c）Aperture will be maintained constant；
Step5：Adjust pressurising pilot valve needle-valve（2f）With pressure relief pilot-actuated valve needle-valve（3f）Aperture, main valve control can be adjusted respectively
Chamber（1a）Water-filling, drainage speed, so as to adjust the reaction speed of main valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710619113.3A CN107246498B (en) | 2017-07-26 | 2017-07-26 | Double pilot valve control system and control method for pressure reducing valve of water supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710619113.3A CN107246498B (en) | 2017-07-26 | 2017-07-26 | Double pilot valve control system and control method for pressure reducing valve of water supply system |
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| CN107246498A true CN107246498A (en) | 2017-10-13 |
| CN107246498B CN107246498B (en) | 2023-10-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108223867A (en) * | 2017-12-27 | 2018-06-29 | 杭州春江阀门有限公司 | A kind of Depressure valve |
| CN112739944A (en) * | 2018-08-17 | 2021-04-30 | 伯尔梅特有限公司 | Pilot valve assembly with directional adjustment |
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| CN207064790U (en) * | 2017-07-26 | 2018-03-02 | 中国长江电力股份有限公司 | A kind of double guide's valve control systems of water system pressure-reducing valve |
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| CN108223867A (en) * | 2017-12-27 | 2018-06-29 | 杭州春江阀门有限公司 | A kind of Depressure valve |
| CN112739944A (en) * | 2018-08-17 | 2021-04-30 | 伯尔梅特有限公司 | Pilot valve assembly with directional adjustment |
| CN112739944B (en) * | 2018-08-17 | 2022-10-14 | 伯尔梅特有限公司 | Pilot valve assembly with directional adjustment |
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