CN107387786A - Have the multi-functional pressure/flow control valve and its operating method of good sealing property concurrently - Google Patents
Have the multi-functional pressure/flow control valve and its operating method of good sealing property concurrently Download PDFInfo
- Publication number
- CN107387786A CN107387786A CN201710120554.9A CN201710120554A CN107387786A CN 107387786 A CN107387786 A CN 107387786A CN 201710120554 A CN201710120554 A CN 201710120554A CN 107387786 A CN107387786 A CN 107387786A
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- Prior art keywords
- valve
- oil
- hydraulic
- oil cylinder
- servo
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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
- 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
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
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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
-
- 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
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/124—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston servo actuated
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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
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
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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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention discloses a kind of multi-functional pressure/flow control valve for having good sealing property concurrently, apply in feed pump turbine high pressure standby steam source, the control valve includes valve, hydraulic actuating mechanism and the support frame for connecting valve with hydraulic actuating mechanism；Valve includes valve body, in valve body and the valve seat and sleeve and valve rod that are sequentially connected；The position connected on sleeve with valve body import and valve seat is designed with some sieve apertures；Sleeve and the valve plug of valve stem end installation coordinate；Valve rod extends valve body and is connected with providing the hydraulic actuating mechanism of driving force；Hydraulic actuating mechanism includes oil cylinder piston component and hydraulic control module；Hydraulic control one-way valve and inserted valve connect through pressure release check valve with security personnel's oil pipe line.Control valve of the present invention can realize the unlatching of valve, closing, quick closing valve, regulation, protect the functions such as position, and multiple functions are integrated in into a valve control system, system architecture is not only simplify, reduces maintenance difficulty, while be greatly reduced production and maintenance cost.
Description
Technical field
The invention belongs to valve technology field, is related to a kind of multi-functional pressure/flow control valve for having good sealing property concurrently
And its operating method.
Background technology
Pressure/flow control valve, which can be used for realizing, to be controlled the pressure/flow of liquid or gas, and it normally only has single
Adjusting function, such as regulation, water conservancy diversion, quick closing valve etc.；However, some valves, such as apply to boiler feed pump turbine high voltage standby
With the valve on jet chimney, to be not only responsible for, when the vapour source that works can not meet system worked well, high voltage standby being steamed
Vapour source adjusts (decompression) by pressure and safely accessed in water pump steam turbine, to meet the normal work of system, while works as system
High voltage standby vapour source also can be rapidly closed after meeting operating pressure, is switched to normal work vapour source to maintain system just
Often operation, so both needing the control valve with regulatory function in such field, needs with work(such as open and close, quick closing valves again
The control valve of energy, thus needs to arrange polytype control valve and pipeline in valve control system, not only causes valve control system
Structure is numerous and jumbled, maintenance difficult, and adds valve control system manufacture and maintenance cost.Therefore, design is a can both realize tune
The pressure/flow control valve of the multiple functions such as section, quick closing valve, tool are of great significance.
In addition, although it is contemplated that sealing between partial component in conventional valve design, but due to by difficulty of processing with
And the influence of processing cost, it seals grade and is difficult to reach requirement, particularly after prolonged erosion, its sealing property
It can be severely impacted, so that the service life of valve greatly shortens.
The content of the invention
The purpose of the present invention is intended to be directed to deficiency of the prior art, there is provided a kind of multi-functional pressure for having good sealing property concurrently
Power/flow control valve, regulation, quick closing valve can be realized simultaneously and protects the functions such as position.
Another object of the present invention is to provide the behaviour of the above-mentioned multi-functional pressure/flow control valve for having good sealing property concurrently
Make method.
In order to achieve the above object, the invention provides a kind of multi-functional pressure/flow control for having good sealing property concurrently
Valve, the control valve include valve, hydraulic actuating mechanism and the support frame for connecting valve with hydraulic actuating mechanism；The valve
Including valve body, in valve body and the valve seat and sleeve and valve rod that are sequentially connected；On the sleeve with valve body import and valve
The position of seat connection is designed with some sieve apertures；The sleeve and the valve plug of valve stem end installation coordinate；The valve rod extends valve
Body is connected with providing the hydraulic actuating mechanism of driving force；The hydraulic actuating mechanism includes oil cylinder-piston component and hydraulic control
Module；Oil cylinder-the piston component provides driving force for valve, and its piston rod is connected with stretching out the valve rod of valve body；The hydraulic pressure
Oil sources moves towards so that oil cylinder-piston rod assembly motion, including quick closing valve magnetic valve, fluid-control one-way in control module control oil pipe road
Valve, inserted valve, servo valve, pressure release check valve；During the quick closing valve magnetic valve dead electricity, an interface is connected with inserted valve, another
Be connected by filter with in-line, when the quick closing valve magnetic valve obtains electric, an interface is connected with inserted valve, another interface with
Return line connects；The inserted valve is respectively connecting to oil cylinder and return line in oil cylinder-piston rod assembly；The servo valve
When obtaining positive electricity, an interface is connected through normally open solenoid valve with the oil cylinder in oil cylinder-piston rod assembly, and another is by filter with entering
Oil pipe line connects, and when the servo valve obtains negative electricity, an interface connects through the oil cylinder in normally open solenoid valve and oil cylinder-piston rod assembly
Connect, another interface is connected with return line, and during the servo valve dead electricity, total interface is off；The hydraulic control list
Connected to valve and inserted valve through pressure release check valve with security personnel's oil pipe line.
Above-mentioned multi-functional pressure/the flow control valve for having good sealing property concurrently, the oil cylinder connect with oil return pipe.
Above-mentioned multi-functional pressure/the flow control valve for having good sealing property concurrently, the hydraulic actuating mechanism also include electric
Control module, the electric control module are used to receive the control signal from outside and send control signal to each magnetic valve.
Above-mentioned multi-functional pressure/the flow control valve for having good sealing property concurrently, the valve seat are venturi valve seat, and by valve
The part and valve seat that seat contacts with medium carry out stellite cure process with valve plug contact portion, plate one layer of setting thickness
With the stellite of hardness, so as to increase the hardness of valve seat, anti-cavitation, resistance to erosion ability, in order to avoid due to prolonged erosion,
Influence the sealing property between valve seat and valve plug；Connected between the valve seat and valve body by welding manner, so as to reduce
Interior leak source；Offer U-type groove in valve body and valve seat junction, and U-type groove is spaced apart, so either welding deformation is still
Valve seat deforms, and U-type groove can provide elastic supplement, makes sealing more stable and reliable.
Above-mentioned multi-functional pressure/the flow control valve for having good sealing property concurrently, support frame as described above top perform machine with hydraulic pressure
Structure is connected, and bottom is connected by bonnet and valve body；The valve rod penetrated in support frame penetrates support frame with oil cylinder-piston rod assembly
Piston rod is connected；The upper cover of piston rod penetrated in support frame is connected to spring；The upper end of the spring abuts with support frame top, under
Hold and abutted with the bracket installed on the piston rod；The bracket is consolidated with the slide plate on the displacement transducer on support frame
Even.The driving of oil cylinder-piston rod assembly is resetted to realize by the compression of the oil sources in in-line and spring, is entered
Oil sources in oil pipe line promotes piston rod to move up, and moving up for piston rod can make spring be in compressive state, in oil
When hydraulic oil in cylinder flows back, piston rod can be made to return to original position under the effect of spring power.The present invention is using straight
It linear movement pick-up, can be used for the displacement for measuring valve rod, and the signal of collection fed back into electric control module, electrically
Control module can send instruction according to the current status of valve, so as to further operate the action of valve.
Above-mentioned multi-functional pressure/the flow control valve for having good sealing property concurrently, in order to increase the close of valve plug and sleeve connection
Feng Xing, there is sealing surface in the upper design of valve plug and sleeve connection, sealing surface is by valve plug upper end ring-shaped step and sleeve lining
Between the sealing ring, the first back-up ring and elastic second back-up ring that set gradually form；The sealing ring is expanded graphite；Described second
Back-up ring is caught in the neck of valve plug upper end design.By above-mentioned Seal Design, the leakage class of sealing surface can reach ANSI V levels.
Above-mentioned multi-functional pressure/the flow control valve for having good sealing property concurrently, in order to further improve the sealing of valve
Can, the cavity and sleeve that the bonnet is formed with docking sleeve, which are docked with valve body in the cavity to be formed, is provided with metal sawtooth
Pad；The sawtooth cushion material is metal；Simple metal sawtooth pad, which combines simple metal pad, can bear higher temperature and pressure
Excellent properties and grooved metal gasket few advantage is contacted with sealing surface, thus it can reach very high seal pressure, so as to
Reduce the pretightning force of fastening bolt；In addition, simple metal sawtooth pad also possesses good mechanical performance, heat conductivity, heat resistance, resistance to
Pressure property, corrosion resistance.
Above-mentioned multi-functional pressure/the flow control valve for having good sealing property concurrently, by double filler realize valve stem seal without
Leakage, make sealing more stable, reliable, specific implementation is that the upper end of the bonnet is fixed with hold-down grid；The filler
The first filler, lantern sleeve, the second filler and packing ring, the filler are disposed with the cavity that pressing plate, bonnet and valve rod are formed
Gland is provided between pressing plate and the first filler；First filler and the conventional selection that the second filler is this area, first fills out
Material and the second filler can be with identical, can also be different.
The operating method of the above-mentioned multi-functional pressure/flow control valve for having good sealing property concurrently is as follows：
When oil pressure of ensuring public security is normal, the above-mentioned multi-functional pressure/flow control valve for having good sealing property concurrently not only has valve concurrently
Men Kai, valve are closed, valve quick closing valve function, and the function of position is also protected with valve regulated, valve, and its operating process includes：
(1) valve opening：Quick closing valve magnetic valve is not charged, and the hydraulic oil of power oil pump is through oil inlet pipe, quick closing valve magnetic valve to inserting
Fill the control chamber of valve, inserted valve closure；Hydraulically-controlled one-way valve is opened simultaneously, and when servo valve receives valve opening signal, its oil-feed is led to
Road is connected, and the hydraulic oil of power oil pump enters oil cylinder through oil inlet pipe, servo valve, and in-oil cylinder piston rod is lifted up, at spring
In compressive state, so as to be lifted with ovable valve stem, valve opening；
(2) valve is closed：Quick closing valve magnetic valve is not charged, control chamber of the hydraulic oil through quick closing valve magnetic valve to inserted valve, inserting
Valve closes；Hydraulically-controlled one-way valve is opened simultaneously, and when servo valve, which receives, closes valve signal, its way to cycle oil is connected, and hydraulic oil passes through
Servo valve is back to hydraulic oil container by oil cylinder through oil return pipe, and now, the spring reset in compression, in-oil cylinder piston rod is downward
Mobile, so as to be moved down with ovable valve stem, valve is closed；
(3) valve quick closing valve：Quick closing valve magnetic valve obtains electric commutation, and the oil in the control chamber of inserted valve is passed through back by quick closing valve magnetic valve
Oil pipe is back to hydraulic oil container, while hydraulic control one-way valve pilot port decompression, blocks servo valve oil-feed path, is now in compression
Spring reset, in-oil cylinder oil are back to hydraulic oil container through inserted valve, oil return pipe, and in-oil cylinder piston rod moves down, so as to
Band ovable valve stem moves down, and valve realizes quick closing valve；In addition, work as oil inlet pipe oil inlet decompression, so as to cause hydraulic control one-way valve guide
Mouth decompression, blocks servo valve oil-feed path, is now in the spring reset of compression, and in-oil cylinder oil returns through inserted valve, oil return pipe
Hydraulic oil container is back to, in-oil cylinder piston rod moves down, and so as to be moved down with ovable valve stem, valve also realizes quick closing valve；
(4) valve regulated：Quick closing valve magnetic valve is not charged, and the hydraulic oil of power oil pump is through oil inlet pipe, quick closing valve magnetic valve to inserting
Fill the control chamber of valve, inserted valve closure；Hydraulically-controlled one-way valve is opened simultaneously, and when servo valve receives valve regulated signal, it enters
Oily path is switched on or switched off, and its operation principle is identical with (1) or (2), so as to realize the function of valve position regulation；
(5) valve protects position：When servo valve receives the instructions such as valve opening, closing, regulation and signal, normally open solenoid valve
Band conducts simultaneously, ensures that servo valve oil circuit is unimpeded；When valve regulated in place after, normally open solenoid valve dead electricity, block oil circuit, so as to
It is held in place valve；In addition, the accident dead electricity when servo valve adjustment work, normally open solenoid valve dead electricity, blocks oil circuit, so as to
Valve is held in place, realizes that valve protects position；
When ensuring public security oil sources decompression, the oil of the control chamber of inserted valve and hydraulic control one-way valve pilot port is by letting out on oil pipe of ensuring public security
Check valve is pressed to open, while valve realizes quick closing valve.
Compared with prior art, the invention has the advantages that：
(1) multi-functional pressure/flow control valve of the invention for having good sealing property concurrently can realize the unlatching of valve, close
Close, quick closing valve, regulation, protect the function such as position, multiple functions are integrated in a valve control system, compared to being arranged in existing valve control system
Polytype control valve and pipeline, it not only simplify system architecture, reduce maintenance difficulty, while be greatly reduced production
And maintenance cost.
(2) multi-functional pressure/flow control valve of the invention for having good sealing property concurrently is primarily adapted for use in boiler feedwater mercury vapour
The high voltage standby of turbine can quickly be responded with work steam source pipe road according to instruction, to realize to high voltage standby work vapour
Decompression, unlatching and the quick closedown in source, make the steam pressure substantially constant into feed pump turbine；And it can be adjusted according to instruction
The throttle flow of steam turbine is saved, to meet the power demand of boiler feed pump.
(3) present invention has multi-functional pressure/flow control valve of good sealing property concurrently, passes through the hydraulic control set before servo valve
Check valve, it can connect according to pilot port pressure change or disconnect oil circuit, so that servo valve avoids producing maloperation, influence
Valve event.
(4) present invention has multi-functional pressure/flow control valve of good sealing property concurrently, is provided with security personnel's oil pipe and pressure release list
To valve, so as to realize in the case of oil sources decompression of ensuring public security, rapid-closure damper.
(5) present invention has multi-functional pressure/flow control valve of good sealing property concurrently, by multi-sealed design, improves
The sealing stability and reliability of valve.
Brief description of the drawings
Fig. 1 is the structural representation for the multi-functional pressure/flow control valve for having good sealing property concurrently.
Fig. 2 is part A enlarged diagram in Fig. 1.
Fig. 3 is part B enlarged diagram in Fig. 1.
Fig. 4 is C portion enlarged diagram in Fig. 1.
Fig. 5 is D enlarged schematic partial views in Fig. 1.
Fig. 6 is the principle schematic of hydraulic control.
Fig. 7 is that the multi-functional pressure/flow control valve for having good sealing property concurrently shows applied to the principle of boiler feed pump turbine
It is intended to.
Wherein, 1, valve body, 2, valve plug, 3, sealing ring, the 4, first back-up ring, the 5, second back-up ring, 6, sleeve, 7, metal sawtooth
Pad, 8, bonnet, 9, hold-down grid, 10, gland, the 11, first filler, 12, lantern sleeve, the 13, second filler, 14, packing ring,
15th, valve rod, 16, flange, 17, valve seat, 18, U-type groove, 19, support frame, 20, displacement transducer, 21, spring, 22, hydraulic pressure performs
Mechanism, 2201, oil cylinder, 2202, piston rod, 2203, quick closing valve magnetic valve, 2204, inserted valve, 2205, servo valve, 2206, normally opened
Magnetic valve, 2207, hydraulic control one-way valve, 2208, pressure release check valve, 2209, filter.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described：
Multi-functional pressure/the flow control valve provided by the invention for having good sealing property concurrently, structure is as shown in figure 1, the control
Valve processed includes valve, hydraulic actuating mechanism 22 and the support frame 19 for connecting valve and hydraulic actuating mechanism 22；Hydraulic pressure performs
Mechanism 22 includes oil cylinder-piston rod assembly, hydraulic control module and electric control module.
As shown in figure 1, valve includes valve body 1, valve plug 2, sleeve 6, bonnet 8, valve rod 15 and valve seat 17；The import of valve body 1
It is L-shaped with exporting, and realized connect by flange 16 and external equipment respectively；Valve seat 17 and sleeve 6 are sequentially connected and along outlets
Place direction is arranged in valve body 1；The position connected on sleeve 6 with valve body import and valve seat is designed with some sieve apertures；The set
Cylinder 6 and the valve plug 2 of the end of valve rod 15 installation coordinate, and drive valve plug 2 to move up and down by valve rod 15, and then adjust by sleeve
The sieve aperture quantity connected with valve body import and valve seat, so as to reach the effect of control flow；The upper end of sleeve 6 is provided with and valve rod 15
Coordinate the bonnet 8 sealed to sleeve 6 and valve rod 15；Bonnet 8 is connected with the lower end of support frame 19 by bolts and nuts realization,
Valve rod 15 stretches out bonnet 8 and penetrated in support frame 19；.
As shown in Fig. 2 valve seat 17 is venturi valve seat, and the part that valve seat 17 is contacted with medium and valve seat 17 and valve
Fill in 2 contact portions and carry out stellite cure process, plating a layer thickness 2mm-3mm, Si Taili of the hardness more than HRc42 are closed
Gold；Connected between valve seat 17 and valve body 1 by welding manner, so as to reduce interior leak source；In valve body 1 and the junction of valve seat 17
U-type groove 18 is offered, so either welding deformation or valve seat 17 deforms, and U-type groove 18 can provide elastic supplement, makes close
Envelope is more stable and reliable.
As shown in figure 3, having sealing surface with the upper design that sleeve 6 is connected in valve plug 2, sealing surface is by the top ring of valve plug 2
Sealing ring 3, the first back-up ring 4 and elastic second back-up ring 5 set gradually between shape step and sleeve lining is formed；Sealing ring 3 is
Expanded graphite；Second back-up ring 5 is caught in the neck of the upper end of valve plug 2 design, passes through above-mentioned Seal Design, the leakage class of sealing surface
It can reach ANSIV levels.
As shown in figure 4, the cavity formed is docked with sleeve 6 for bonnet 8 and sleeve 6 is docked with valve body 1 in the cavity formed
It is provided with metal sawtooth pad 7；Simple metal sawtooth pad, which combines simple metal pad, can bear the excellent of higher temperature and pressure
Different in nature energy and grooved metal gasket contact few advantage with sealing surface, thus it can reach very high seal pressure, so as to reduce
The pretightning force of fastening bolt；In addition, simple metal sawtooth pad also possesses good mechanical performance, heat conductivity, heat resistance, pressure-resistant
Property, corrosion resistance.
As shown in figure 5, the upper end of bonnet 8 is fixed by being fixed with hold-down grid 9, hold-down grid 9 by bolt and bonnet 8
Connection；The first filler 11, lantern sleeve 12 are disposed with the cavity that hold-down grid 9, bonnet 8 and valve rod 15 are formed, second is filled out
Expect 13 and packing ring 14, gland 10 is provided between the filler 11 of hold-down grid 9 and first；First filler 11 and the second filler 13
It is soft graphite.
As shown in figure 1, hydraulic actuating mechanism 22 is connected with the top of support frame 19, oil cylinder-piston rod assembly therein includes
Oil cylinder 2201 and piston rod matching used with oil cylinder 2202；The piston rod 2202 is penetrated in support frame 19, and and valve rod
15 are fixedly connected；Spring 21 is socketed with the piston rod 2202 penetrated in support frame 19；The upper end of spring 21 and support frame top
Abut, lower end abuts with the bracket on piston rod 2202；Bracket and the displacement transducer 20 on support frame 19
On slide plate be connected.The displacement transducer 20 that the present invention uses is is linear displacement transducer.
As shown in fig. 6, oil sources is moved towards so that oil cylinder-piston rod assembly motion in hydraulic control module control oil pipe road；Liquid
Control module is pressed to include quick closing valve magnetic valve 2203, inserted valve 2204, servo valve 2205, normally open solenoid valve 2206, hydraulic control one-way valve
2207, pressure release check valve 2208, filter 2209.The dead electricity of quick closing valve magnetic valve 2203 obtains electric working condition difference, and access port is not
Together, during 2203 dead electricity of quick closing valve magnetic valve, an interface is connected with inserted valve 2204, and another interface passes through filter 2209 and oil-feed
Pipeline XL1 connections；When quick closing valve magnetic valve 2203 obtains electric, an interface is connected with inserted valve 2204, another interface and oil return pipe
Connection.Inserted valve 2204 is further connected to oil cylinder 2201 and return line YL2 in addition to being connected with quick closing valve magnetic valve 1303.
Servo valve 2205 is different according to working condition, and access port is then different, when servo valve 2205 obtains positive electricity (such as 0~40mA), servo
Valve 2205 obtains valve opening signal, and an interface is connected through normally open solenoid valve 2206 with hydraulic jack 2201, and another interface passes through
Filter 2209 is connected with in-line XL1；When servo valve 2205 obtains negative electricity (such as -40mA~0), servo valve 2205, which obtains, closes valve
Signal, an interface are connected through normally open solenoid valve 2206 with hydraulic jack 2201, and another interface is connected with return line YL2；
During 2205 dead electricity of servo valve, servo valve is closed, and is not connected with any pipeline.Hydraulic control one-way valve 2207 and inserted valve 2204 are through pressure release
Check valve 2208 connects with security personnel oil pipe line ZL3.Oil cylinder 2201 further connects with return line YL2.Filter 2209 is installed
In the outside of support frame 7, it is connected with in-line stop valve and in-line hydraulic control one-way valve 2207 respectively.Oil in oil inlet pipe
Generally there is impurity, if things go on like this servo valve 1305 can be caused to block, and filter 2209 then plays filtering oil inlet pipe
The effect of middle oily impurity, its entrance point connect with in-line, and the port of export is connected with servo valve 2205 and increased in connecting line
If hydraulic control one-way valve 2207 is convenient for measuring oil pressure with pressure gauge；Other filter 2209 is double filter core band warning devices, when one
Filter core has filtered enough impurity, and then warning reminding changes filter core to warning device, and the effect of double filter cores is that and can be achieved online
Filter core is changed without influenceing control valve normally work and operation.
Above-mentioned electric control module is used to receive the control signal from outside and sends control signal to each valve；Should
Electric control module can be realized using the conventional meanses that this area discloses.
The course of work of the multi-functional pressure/flow control valve for having good sealing property concurrently of the present embodiment is：
When oil pressure of ensuring public security is normal, its operating process includes：
(1) valve opening：Quick closing valve magnetic valve 2203 is not charged, and the hydraulic oil of power oil pump is through in-line XL1, fast powered-down
To the control chamber of inserted valve 2204, inserted valve 2204 closes magnet valve 2203；Hydraulically-controlled one-way valve 2207 is opened simultaneously, works as servo valve
2205 when receiving valve opening signal, and its oil-feed path is connected, and the hydraulic oil of power oil pump is through in-line XL1, servo valve 2205
Into oil cylinder 2201, in-oil cylinder piston rod 2202 is lifted up, and spring 21 is in compressive state, so as to be carried with ovable valve stem 15
Rise, valve opening.
(2) valve is closed：Quick closing valve magnetic valve 2203 is not charged, and hydraulic oil is through quick closing valve magnetic valve 2203 to inserted valve 2204
Control chamber, inserted valve 2204 close；Hydraulically-controlled one-way valve 2207 is opened simultaneously, when servo valve 2205, which receives, closes valve signal, its
Way to cycle oil is connected, and hydraulic oil is back to hydraulic oil container through return line YL2 by oil cylinder by servo valve 2205, now, is in
The spring 21 of compression is resetted, and in-oil cylinder piston rod 2202 moves down, and so as to be moved down with ovable valve stem 15, valve is closed.
(3) valve quick closing valve：Quick closing valve magnetic valve 2203 electric commutation, the oil in the control chamber of inserted valve 2204 pass through fast powered-down
Magnet valve 2203 is back to hydraulic oil container, while the pilot port decompression of hydraulic control one-way valve 2207 through return line YL2, blocks servo valve
2205 oil-feed paths, the spring 21 for being now in compression reset, and in-oil cylinder oil returns through inserted valve 2204, return line YL2
To hydraulic oil container, in-oil cylinder piston rod 2202 moves down, and so as to be moved down with ovable valve stem 15, valve realizes quick closing valve；This
Outside, when in-line XL1 oil inlet decompressions, so as to cause the pilot port decompression of hydraulic control one-way valve 2207, block servo valve 2205 and enter
Oily path, the spring 21 for being now in compression are resetted, and the oil in oil cylinder 2201 is back to through inserted valve 2204, return line YL2
Hydraulic oil container, in-oil cylinder piston rod 2202 move down, and so as to be moved down with ovable valve stem 15, valve also realizes quick closing valve.
(4) valve regulated：Quick closing valve magnetic valve 2203 is not charged, and the hydraulic oil of power oil pump is through in-line XL1, fast powered-down
To the control chamber of inserted valve 2204, inserted valve 2204 closes magnet valve 2203；Hydraulically-controlled one-way valve 2207 is opened simultaneously, works as servo valve
2205 when receiving valve regulated signal, its oil-feed path or is switched on or switched off, and its operation principle is identical with (1) or (2),
So as to realize the function of valve position regulation.
(5) valve protects position：When servo valve 2205 receives the instructions such as valve opening, closing, regulation and signal, normally opened electricity
Band conducts magnet valve 2206 simultaneously, ensures that the oil circuit of servo valve 2205 is unimpeded；When valve regulated in place after, normally open solenoid valve 2206 loses
Electricity, oil circuit is blocked, so that valve is held in place；In addition, the accident dead electricity when 2205 adjustment work of servo valve, normally opened electromagnetism
The dead electricity of valve 2206, blocks oil circuit, so that valve is held in place, realizes that valve protects position.
When ensuring public security oil sources decompression, the control chamber of inserted valve 2204 and the oil of the pilot port of hydraulic control one-way valve 2207 will security personnel's oil
Pressure release check valve 2208 on pipeline is opened, while valve realizes quick closing valve.
The groundwork medium of the multi-functional pressure/flow control valve is steam, and it is applied to boiler feed pump turbine
Schematic diagram it is as shown in Figure 7.For boiler feed pump turbine, the pressure on its steam line after stop valve and regulating valve is usual
A standard value can be set, but accesses the operating on low voltage vapour source of stop valve, sometimes it cannot be guaranteed that entering the stream of water pump steam turbine
Amount always meets the standard value of setting；In order to meet the standard value of the setting, it is necessary to which the cooperation of high pressure standby steam source, switches both
Use, to meet the safe operation of steam turbine；High pressure standby steam source is switched fast in order to realize, in feed pump turbine
Multi-functional pressure/flow control valve that high voltage standby is integrally depressurized with being provided with steam pipe to high-pressure work vapour source, it is responsible for
By in high pressure reserve steam secure accessing water pump steam turbine；So when operating on low voltage vapour source can not meet system worked well,
High pressure standby steam source can be rapidly switched to ensure system normal operation；And when the vapour source that steam is provided for steam turbine meets to want
After asking, it is necessary to using control valve rapid-closure damper, with cutoff high work vapour source.
One of ordinary skill in the art will be appreciated that embodiment described here is to aid in reader and understands this hair
Bright principle, it should be understood that protection scope of the present invention is not limited to such especially statement and embodiment.This area
Those of ordinary skill can make according to these technical inspirations disclosed by the invention various does not depart from the other each of essence of the invention
The specific deformation of kind and combination, these deform and combined still within the scope of the present invention.
Claims (10)
1. a kind of multi-functional pressure/flow control valve for having good sealing property concurrently, it is characterised in that perform machine including valve, hydraulic pressure
Structure (22) and the support frame (19) for connecting valve and hydraulic actuating mechanism (22)；The valve includes valve body (1), is arranged on
In valve body (1) and the valve seat (17) and sleeve (6) and valve rod (15) that are sequentially connected；On the sleeve (6) with valve body import and
The position of valve seat connection is designed with some sieve apertures；The sleeve (6) and the valve plug (2) of valve rod (15) end installation coordinate；It is described
Valve rod (15) extends valve body (1) and is connected with providing the hydraulic actuating mechanism (22) of driving force；
The hydraulic actuating mechanism (22) includes oil cylinder-piston component and hydraulic control module；Oil cylinder-the piston component is valve
Door provides driving force, and its piston rod (2202) is connected with stretching out the valve rod (15) of valve body (1)；The hydraulic control module control oil
Oil sources moves towards so that oil cylinder-piston rod assembly motion in pipeline, including quick closing valve magnetic valve (2203), hydraulic control one-way valve (2207),
Inserted valve (2204), servo valve (2205), pressure release check valve (2208)；During quick closing valve magnetic valve (2203) dead electricity, one connects
Mouth is connected with inserted valve (2204), and another is connected by filter (2209) with in-line, the quick closing valve magnetic valve (2203)
When obtaining electric, an interface is connected with inserted valve (2204), and another interface is connected with return line；The inserted valve (2204) point
Oil cylinder (2201) and the return line not being connected in oil cylinder-piston rod assembly；When the servo valve (2205) obtains positive electricity, one
Interface is connected through normally open solenoid valve (2206) with the oil cylinder (2201) in oil cylinder-piston rod assembly, and another passes through filter
(2209) it is connected with in-line, when the servo valve (2205) obtains negative electricity, an interface is through normally open solenoid valve (2206) and oil
Oil cylinder (2201) connection in cylinder-piston rod assembly, another interface are connected with return line, servo valve (2205) dead electricity
When, total interface is off；The hydraulic control one-way valve (2207) and inserted valve (2204) are through pressure release check valve (2208)
Connected with security personnel's oil pipe line.
2. have multi-functional pressure/flow control valve of good sealing property concurrently according to claim 1, it is characterised in that the valve
Seat (17) is venturi valve seat；The valve body (1) offers U-type groove (18) with valve seat (17) junction.
3. multi-functional pressure/the flow control valve according to claim 1 or claim 2 for having good sealing property concurrently, it is characterised in that institute
State and be connected at the top of support frame (19) with hydraulic actuating mechanism (22), bottom is connected by bonnet (8) and valve body (1)；Penetrate support
The piston rod (2202) that valve rod (15) in frame (19) penetrates support frame (19) with oil cylinder-piston rod assembly is connected；Penetrate support
Spring (21) is socketed with piston rod (2202) in frame (19)；The upper end of the spring (21) abuts with support frame top, under
Hold and abutted with the bracket installed on the piston rod；On the bracket and the displacement transducer (20) being arranged on support frame (19)
Slide plate is connected.
4. have multi-functional pressure/flow control valve of good sealing property concurrently according to claim 3, it is characterised in that the valve
Sealing ring (3), the first back-up ring (4) and elastic second gear are disposed between plug (2) upper end ring-shaped step and sleeve (6) inwall
Enclose (5).
5. have multi-functional pressure/flow control valve of good sealing property concurrently according to claim 4, it is characterised in that described close
Seal (3) is expanded graphite；Second back-up ring (5) is caught in the neck of valve plug (2) upper end design.
6. have multi-functional pressure/flow control valve of good sealing property concurrently according to claim 3, it is characterised in that the valve
Lid (8) docks the cavity formed with sleeve (6) and sleeve (6) docks in the cavity formed with valve body (1) and is provided with metal
Sawtooth pad (7).
7. have multi-functional pressure/flow control valve of good sealing property concurrently according to claim 3, it is characterised in that the valve
The upper end of lid (8) is fixed with hold-down grid (9)；In the cavity that the hold-down grid (9), bonnet (8) and valve rod (15) are formed according to
It is secondary to be provided with the first filler (11), lantern sleeve (12), the second filler (13) and packing ring (14).
8. have multi-functional pressure/flow control valve of good sealing property concurrently according to claim 7, it is characterised in that described to fill out
Gland (10) is provided between material pressing plate (9) and the first filler (11).
9. have multi-functional pressure/flow control valve of good sealing property concurrently according to claim 1, it is characterised in that the oil
Cylinder (2201) connects with oil return pipe.
10. have the behaviour of multi-functional pressure/flow control valve of good sealing property described in claim 1 to 9 any claim concurrently
Make method：
When oil pressure of ensuring public security is normal, the operation of the above-mentioned multi-functional pressure/flow control valve for having good sealing property concurrently includes valve
Unlatching, valve closing, valve quick closing valve, valve regulated, valve protect position, are specially：
(1) valve opening：Quick closing valve magnetic valve (2203) is not charged, and the hydraulic oil of power oil pump is through oil inlet pipe, quick closing valve magnetic valve
(2203) to the control chamber of inserted valve (2204), inserted valve (2204) closure；Hydraulically-controlled one-way valve (2207) is opened simultaneously, works as servo
When valve (2205) receives valve opening signal, its oil-feed path is connected, and the hydraulic oil of power oil pump is through oil inlet pipe, servo valve (2205)
Into oil cylinder (2201), in-oil cylinder piston rod (2202) is lifted up, and spring (21) is in compressive state, so as to ovable valve stem
(15) lifted, valve opening.
(2) valve is closed：Quick closing valve magnetic valve (2203) is not charged, and hydraulic oil is through quick closing valve magnetic valve (2203) to inserted valve (2204)
Control chamber, inserted valve (2204) closure；Hydraulically-controlled one-way valve (2207) is opened simultaneously, and valve letter is closed when servo valve (2205) receives
Number when, its way to cycle oil is connected, and hydraulic oil is back to oil return box by oil cylinder (2201) by servo valve (2205) through oil return pipe, this
When, spring (21) in compression resets, and in-oil cylinder piston rod (2202) moves down, so as to ovable valve stem (15) to moving down
Dynamic, valve is closed.
(3) valve quick closing valve：Quick closing valve magnetic valve (2203) electric commutation, the oil in the control chamber of inserted valve (2204) pass through fast powered-down
Magnet valve (2203) is back to oil return box, while hydraulic control one-way valve (2207) pilot port decompression through oil return pipe, blocks servo valve
(2205) oil-feed path, the spring (21) for being now in compression reset, and the oil in oil cylinder (2201) is through inserted valve (2204), oil return
Pipe is back to oil return box, and in-oil cylinder piston rod (2202) moves down, and so as to be moved down with ovable valve stem (15), valve is realized
Quick closing valve；
And/or when oil inlet pipe oil inlet decompression, so as to cause hydraulic control one-way valve (2207) pilot port decompression, block servo valve
(2205) oil-feed path, the spring (21) for being now in compression reset, and in-oil cylinder oil returns through inserted valve (2204), oil return pipe
To oil return box, in-oil cylinder piston rod (2202) is moved down, and so as to be moved down with ovable valve stem (15), valve is also realized soon
Close.
(4) valve regulated：Quick closing valve magnetic valve (2203) is not charged, and the hydraulic oil of power oil pump is through oil inlet pipe, quick closing valve magnetic valve
(2203) to the control chamber of inserted valve (2204), inserted valve (2204) closure；Hydraulically-controlled one-way valve (2207) is opened simultaneously, works as servo
When valve (2205) receives valve regulated signal, its oil-feed path or be switched on or switched off, its operation principle with (1) or (2)
It is identical, so as to realize the function of valve position regulation.
(5) valve protects position：When servo valve (2205) receives the instructions such as valve opening, closing, regulation and signal, normally opened electromagnetism
Valve (2206) while band conducts, ensure that servo valve oil circuit is unimpeded；When valve regulated in place after, normally open solenoid valve (2206) lose
Electricity, oil circuit is blocked, so that valve is held in place；In addition, the accident dead electricity when servo valve adjustment work, normally open solenoid valve
(2206) dead electricity, oil circuit is blocked, so that valve is held in place, realizes that valve protects position.
When ensuring public security oil sources decompression, the control chamber of inserted valve (2204) and the oil of hydraulic control one-way valve (2207) pilot port will security personnel's oil
Pressure release check valve (2208) on pipe is opened, while valve realizes quick closing valve.
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| CN201710120554.9A CN107387786B (en) | 2017-03-02 | 2017-03-02 | Multifunctional pressure/flow control valve with good sealing performance and operation method thereof |
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| CN201710120554.9A CN107387786B (en) | 2017-03-02 | 2017-03-02 | Multifunctional pressure/flow control valve with good sealing performance and operation method thereof |
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| CN107387786B CN107387786B (en) | 2023-04-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210156482A1 (en) * | 2018-07-05 | 2021-05-27 | Siemens Energy Global GmbH & Co. KG | Valve arrangement and fluid flow control element |
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| CN107387786B (en) | 2023-04-28 |
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