CN108386402A - A kind of remote control liquid gas balance high-pressure high-flow back pressure apparatus - Google Patents
A kind of remote control liquid gas balance high-pressure high-flow back pressure apparatus Download PDFInfo
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- CN108386402A CN108386402A CN201810131660.1A CN201810131660A CN108386402A CN 108386402 A CN108386402 A CN 108386402A CN 201810131660 A CN201810131660 A CN 201810131660A CN 108386402 A CN108386402 A CN 108386402A
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- valve
- pressure
- spool
- end cover
- counterbalance
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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
- F15B13/029—Counterbalance valves
Abstract
A kind of remote control liquid gas balance high-pressure high-flow back pressure apparatus.Main purpose is to provide a kind of back pressure apparatus suitable for high-pressure high-flow of achievable remote control.It is characterized in that：Mainly it is made of counterbalance valve and accumulator;Back pressure valve core upper end is communicated with accumulator hydraulic port, lower end and controlled fluid communication, spool be free to be axially moved in valve pocket, top is limited by counterbalance valve upper end cover structure, lower section is limited by counterbalance valve bottom end cover structure, spool forms the fluid channel for keeping required back pressure according to the effect of the axial rectangular window on liquid flow combinations valve pocket, realizes the adjusting to highly pressurised liquid and big flow liquid;By adjusting HYDRAULIC CONTROL SYSTEM spool epicoele fluid pressure, pressure compensation is carried out by accumulator, stablize the fluid pressure of the pressure and control spool cavity of resorption of spool epicoele, pressure sensor feedback signal is to control system, and regulation and control system is to realize the stable regulation and remote control of back pressure needed for fluid.
Description
Technical field
The present invention relates to a kind of remote controlled back pressure apparatus suitable for high-pressure high-flow.
Background technology
When back pressure typically refers to moving fluid and flowed along its path in closed container, due to by barrier or zig zag
The obstruction in road and the pressure opposite with the direction of motion being applied in.It in hydraulic system, is generally realized, can be done by counterbalance valve
Counterbalance valve has throttle valve, speed governing valve, overflow valve, sequence valve, check valve etc..Back pressure apparatus used at present can not achieve mostly
Remote control；The pressure sensing control unit occurred automatically controls back pressure apparatus, knot with what stepper motor, push rod etc. were combined
Structure and control are relative complex, are not also suitable for high-pressure high-flow working environment.
Invention content
The technical issues of in order to solve to be previously mentioned in background technology, the present invention provide a kind of liquid gas of achievable remote control
High-pressure high-flow back pressure apparatus is balanced, which carries out pressure compensation using gas in accumulator and fluid balance principle, uses
Hydraulic system filling liquid and return hydraulic control, the back pressure for being suitable for high pressure and big flow that can be adjusted with remote control and automatic stabilisation fill
It sets.The apparatus structure is simple, reliable and stable, and is easily installed, and is the backpressure regulation and remote auto control of high-pressure liquid system
Provide a kind of effective control element and control mode.
The technical scheme is that：This kind of remote control liquid gas balances high-pressure high-flow back pressure apparatus, including counterbalance valve,
It is characterized in that：Described device further includes accumulator, connection four-way, transit joint, upper end connector and outlet connection；
The counterbalance valve includes upper end cover, bottom end cover, valve body, valve pocket, spool, end cap seal circle, valve pocket sealing ring, valve pocket gear
Circle, spool combined seal ring and counterbalance valve attachment screw and elastic washer；
It is useful for the uniformly distributed threaded hole of installation connection and uniformly distributed soket head cap screw counterbore on the upper end cover, is used for and valve body
Installation connection；There is sealing ring installing groove on the outside cylinder sealing surface of the upper end cover, for installing the end cap seal circle, and
Coordinate with valve interior surface and constitutes static seal；There is external cylindrical surface chamfering on the upper end cover；The upper end cover is along central axis
The installation interior column sealed face of valve pocket, valve pocket mounting plane and the transition installed convenient for valve pocket sealing ring is useful on direction to fall
Angle, for the fixed and positioned of valve pocket；The fine thread of end connector in connection accumulator control chamber is useful on the upper end cover
Structure；
There is uniformly distributed soket head cap screw counterbore on the bottom end cover, for being fixedly connected with valve body；The outside cylinder of the bottom end cover
There is sealing ring installing groove on sealing surface, for installing counterbalance valve end cap seal circle, and it is quiet close with valve interior surface cooperation composition
Envelope；There is external cylindrical surface chamfering on the bottom end cover；The bottom end cover upper edge central axial direction is useful for the inner circle of installation valve pocket
Column sealing face, valve pocket mounting plane and the transition chamfering convenient for the installation of valve pocket sealing ring；It is useful for connecting on the bottom end cover
The fine thread structure of lower end inlet connector；
The valve body both sides of the face have uniformly distributed threaded hole corresponding with the upper and lower end cap, for and counterbalance valve upper and lower end
Lid passes through the connection installation of counterbalance valve attachment screw；Be provided in the central axial direction of the valve body back pressure valve body central through hole and
Convenient for the transition chamfering of the upper and lower end cap sealing ring installation of counterbalance valve；The valve body has fine thread on axis direction
The liquid outlet of structure, and the installation sealing plane convenient for the connection of outlet tube line；
The valve pocket is class cylinder cylindrical structure, and the external cylindrical surface upper/lower terminal of the valve pocket is all provided with sealing ring installing groove,
For installing valve pocket sealing ring and valve pocket baffle ring；The axis direction upper/lower terminal of the valve pocket has the chamfering installed convenient for spool；
Have above the lower end external cylindrical surface sealed groove of the valve pocket it is uniformly distributed for fluid by rectangular window；
There are two sealing ring installing grooves on the external cylindrical surface of the spool upper end, for installing spool combined seal ring, to realize
Isolating seal is realized to hydraulic control chamber and fluid media (medium) chamber；Have on the external cylindrical surface of the spool lower end and press slot, with valve pocket
Inner cylinder face constitutes clearance seal；The upper and lower end face area equation of the spool；
The spool upper end of the counterbalance valve is communicated with accumulator hydraulic control chamber, and spool lower end and controlled fluid communication, spool exist
It may be implemented to be axially moved in valve pocket, top is limited by counterbalance valve upper end cover structure, and lower section is by counterbalance valve bottom end cover structure
It is limited, flows to form the fluid channel for keeping required back pressure to realize the spool according to liquid；
The counterbalance valve and accumulator are connected by connecting four-way；The connection four-way upper port connects accumulator, plays pressure
Compensation, the effect for stablizing spool upper cavity pressure；The connection four-way lower port connects counterbalance valve by transit joint；The connection
Four-way left port connects pressure sensor, detects control pressure and feeds back to control system for monitoring system control pressure；Institute
Connection four-way right output port connection external hydraulic system is stated, the pressure of adjusting spool upper end liquid control chamber is used for, passes through hydraulic pressure system
Combined pressure force sensor signals feedback under unified central planning, jointly controls this back pressure apparatus.
The present invention has the advantages that：The present apparatus is mainly made of counterbalance valve and accumulator, utilizes gas in accumulator
The principle of body and fluid balance, using hydraulic system filling liquid and return hydraulic control, back pressure valve core upper end and accumulator hydraulic port phase
Logical, lower end and controlled fluid communication, spool be free to be axially moved in valve pocket, and top is by counterbalance valve upper end cover knot
Structure is limited, and lower section is limited by counterbalance valve bottom end cover structure, and spool is according to the axial square on liquid flow combinations valve pocket
The effect of shape window forms the fluid channel for keeping required back pressure, realizes the adjusting to highly pressurised liquid and big flow liquid.According to
Dynamic balance relation, the pressure balance of the spool upper and lower end face of homalographic, by adjusting HYDRAULIC CONTROL SYSTEM spool epicoele liquid pressure
Power, and pressure compensation is carried out by accumulator, stablize the pressure of spool epicoele, the quilt for being applied to lower end of power is transmitted using spool
At flow control body, and then the fluid pressure of spool cavity of resorption is controlled, feedback signal is transmitted to control system by pressure sensor, then adjust
The stable regulation and remote control of back pressure needed for fluid may be implemented in section control system.The present apparatus is before use, need to be by counterbalance valve
Disengaging valve port pipeline, which is correspondingly connected with, to be installed, and is fed back by hydraulic system overflow valve, three position four-way directional control valve and pressure sensor
Combined signal controls the pressure of spool upper end liquid control chamber, and carries out pressure compensation by accumulator, stablizes upper cavity pressure, in turn
The magnitude of back pressure of controlled liquid that the control present apparatus is connected to spool cavity of resorption, by can in counterbalance valve valve pocket free-moving spool
In conjunction with the effect of axial rectangular window on valve pocket, the present apparatus can be made to meet the adjusting and control of liquid high pressure, big flow, passed through
The signal feedback effect and regulation and control system of pressure sensor may be implemented to carry out remote control to controlled liquid, and providing can
The stabilization back pressure of adjusting, fast response time are simple and compact for structure.
In conclusion the present invention have it is simple in structure, quick and easy for installation, reliable for operation, required back pressure can realize stabilization
The features such as adjusting and remote control.
Description of the drawings：
Fig. 1 is the three-dimensional body structure overall appearance schematic diagram of the present invention.
Fig. 2 is the three-dimensional structure overall appearance schematic diagram of counterbalance valve in the present invention.
Fig. 3 is the two-dimensional structure schematic cross-sectional view of counterbalance valve in the present invention.
Fig. 4 is the upper end cover two-dimensional structure schematic diagram of the counterbalance valve.
Fig. 5 is the upper end cover two-dimensional structure schematic cross-sectional view of the counterbalance valve.
Fig. 6 is the three dimensional structure diagram of the back pressure valve body.
Fig. 7 is the two-dimensional structure schematic cross-sectional view of the back pressure valve body.
Fig. 8 is the bottom end cover two-dimensional structure schematic diagram of the counterbalance valve.
Fig. 9 is the bottom end cover two-dimensional structure schematic cross-sectional view of the counterbalance valve.
Figure 10 is the three dimensional structure diagram of the counterbalance valve valve pocket.
Figure 11 is the two-dimentional sectional view of the counterbalance valve valve pocket.
Figure 12 is the three dimensional structure diagram of the back pressure valve core.
Figure 13 is the main operational principle figure of the present invention.
1- accumulators in figure, 2- connection four-ways, 3- transit joints, the upper end connectors of 4-, 5- counterbalance valves, 6- outlet connections, 7-
Counterbalance valve upper end cover, 8- back pressure valve bodies, 9- counterbalance valve bottom end covers, 10- counterbalance valve end cap attachment screws, 11- counterbalance valve valve pockets,
12- back pressure valve cores, 13- counterbalance valve valve pocket sealing rings, 14- counterbalance valve valve pocket baffle rings, 15- back pressure valve core composite rims, the 16- back ofs the body
Pressure valve end cap seal circle, 17- elastic washers, 18- counterbalance valves install threaded hole, 19- counterbalance valve upper end cover soket head cap screw countersunk heads
Hole, 20- counterbalance valve upper end cover sealed grooves, 21- counterbalance valve upper end cover valve pocket mounting planes, 22- counterbalance valve upper end cover valve pockets peace
Fill hole, 23- counterbalance valve upper end cover inner cylinder face chamferings, 24- counterbalance valve upper end cover external cylindrical surface chamferings, 25- counterbalance valve upper end covers
Mounting plane, 26- counterbalance valve upper end cover fine threads hole, 27- counterbalance valve valve outlet planes, 28- counterbalance valve valve outlet spiral shells
Pit, 29- back pressure valve body inner circle post holes, 30- back pressure valve body inner cylinder face chamferings, 31- back pressure valve bodies install threaded hole,
32- back pressure valve body upper end covers coordinate plane, 33- counterbalance valve valve body lower end lids to coordinate plane, hexagonal in 34- counterbalance valve bottom end covers
Screw counter sink, 35- counterbalance valve bottom end cover mounting planes, 36- counterbalance valve bottom end cover sealed grooves, outside 37- counterbalance valve bottom end covers
Cylinder surface chamfer, 38- counterbalance valve bottom end cover valve pocket mounting holes, 39- counterbalance valve bottom end cover inner cylinder face chamferings, under 40- counterbalance valves
End cap valve pocket mounting plane, 41- counterbalance valve bottom end cover import threaded holes, 42- counterbalance valve valve pocket sealed grooves, 43- counterbalance valve valves
Cover external cylindrical surface chamfering, 44- counterbalance valve valve pocket axial direction rectangular windows, mounting plane under 45- counterbalance valve valve pockets, 46- counterbalance valve valves
Put on mounting plane, cylindrical hole in 47- counterbalance valve valve pockets, 48- counterbalance valve valve pocket inner cylinder face chamferings, 49- back pressure valve cores
Sealed groove, 50- counterbalance valve seal spool grooves, 51- back pressure valve core external cylindrical surface chamferings, 52- counterbalance valve spools cylindrical surface.
Specific implementation mode：
In order to meet in the case of high-pressure high-flow in remote controlled and stable regulation system the needs of pipeline back pressure, the present invention carries
A kind of design scheme for the back pressure apparatus for being suitable for high-pressure high-flow control being made of counterbalance valve and accumulator is supplied.Counterbalance valve
With accumulator by connecting four-way connection；It connects four-way upper port and connects accumulator, play pressure compensation, stablize spool epicoele pressure
The effect of power；Connection four-way lower port connects counterbalance valve by transit joint；It connects four-way left port and connects pressure sensor, inspection
Observing and controlling pressing pressure simultaneously feeds back to control system for monitoring system control pressure；Connect four-way right output port connection external hydraulic system
System is used for the pressure of adjusting spool upper end liquid control chamber, coordinates pressure sensor signal feedback, joint control by hydraulic system
Make this back pressure apparatus.
Back pressure valve core upper end is communicated with accumulator hydraulic control chamber, lower end and controlled fluid communication.Spool is in valve pocket
It may be implemented to be axially moved, top is limited by counterbalance valve upper end cover structure, and lower section is limited by counterbalance valve bottom end cover structure
Position, spool flow the fluid channel to be formed and keep required back pressure according to liquid.The effect of back pressure valve core is by upper end accumulator
The pressure transmission of hydraulic control chamber is to lower end back pressure cavity.Therefore the upper and lower end face area equation of spool that the present invention designs, according to valve
The dynamic balance relation of core, can be by the pressure of adjusting HYDRAULIC CONTROL SYSTEM chamber, to adjust and control the liquid back of the body of spool cavity of resorption
Pressure.The present apparatus can provide adjustable stable back pressure for controlled liquid line, and realize remote control.
The remote control liquid gas of the present invention balances high-pressure high-flow back pressure apparatus, includes mainly accumulator, connection four-way, mistake
Cross connector, counterbalance valve and upper end connector, outlet connection etc..
The counterbalance valve includes upper end cover, bottom end cover, valve body, valve pocket, spool, end cap seal circle, valve pocket sealing ring, valve again
Cover baffle ring, spool combined seal ring and counterbalance valve attachment screw and elastic washer.
The uniformly distributed threaded hole for installing connection is devised on the upper end cover；It is heavy to devise uniformly distributed soket head cap screw
Hole, for being connected with valve body installation；Sealing ring installing groove is devised on outside cylinder sealing surface, it is close for installing counterbalance valve end cap
Seal, and coordinate with valve interior surface and constitute static seal；For the ease of the installation of end cap, external cylindrical surface chamfering is devised；In
Heart axis direction devises interior column sealed face, valve pocket mounting plane and the mistake installed convenient for valve pocket sealing ring of installation valve pocket
Chamfering is crossed, for the fixed and positioned of valve pocket；Devise the fine thread structure of end connector in connection accumulator control chamber.
Uniformly distributed soket head cap screw counterbore is devised on the bottom end cover, for being fixedly connected with valve body；Outer circle column sealing
Sealing ring installing groove is devised on face, for installing counterbalance valve end cap seal circle, and it is quiet close with valve interior surface cooperation composition
Envelope；For the ease of the installation of end cap, external cylindrical surface chamfering is devised；The interior cylinder of installation valve pocket is devised along central axial direction
Sealing surface, valve pocket mounting plane and the transition chamfering convenient for the installation of valve pocket sealing ring, for the fixed and positioned of valve pocket；Design
The fine thread structure of connection lower end inlet connector.
The valve body both sides of the face devise uniformly distributed threaded hole corresponding with the upper and lower end cap of counterbalance valve, are used for and back pressure
The upper and lower end cap of valve is connected by counterbalance valve attachment screw and is installed；Central axial direction devise back pressure valve body central through hole and
Convenient for the transition chamfering of the upper and lower end cap sealing ring installation of counterbalance valve；Going out for fine thread structure is devised perpendicular to axis direction
Liquid mouth, and the installation sealing plane connected convenient for outlet tube line is devised on external cylindrical surface.
The substantially cylindrical cylindrical structure of valve pocket, external cylindrical surface upper/lower terminal all devise sealing ring installing groove, use
In installation valve pocket sealing ring and valve pocket baffle ring；Axis direction upper/lower terminal devises the chamfering installed convenient for spool；Lower end outer circle
Devised above cylinder sealed groove it is uniformly distributed for fluid by rectangular window.
Two sealing ring installing grooves are devised on the external cylindrical surface of the spool upper end, for installing spool combination sealing
Circle realizes isolating seal to hydraulic control chamber and fluid media (medium) chamber；Lower end external cylindrical surface devise it is several press slot, with valve pocket
Inner cylinder face constitutes clearance seal；Axial both ends of the surface devise the chamfering being easily installed.
The remote control liquid gas balance high-pressure high-flow back pressure apparatus on the basis of back pressure valve body, will first install
Valve pocket sealing ring, valve pocket baffle ring valve pocket installed on the counterbalance valve bottom end cover of counterbalance valve end cap seal circle, will pacify
The spool for installing spool combined seal ring is slowly put into valve pocket from top to bottom, then the counterbalance valve that will be installed together with valve pocket
Bottom end cover is slowly mounted in valve body, then the counterbalance valve upper end cover for installing counterbalance valve end cap seal circle is mounted on the upper of valve body
On end face；The upper and lower end cap of counterbalance valve is compressed into sealing respectively by counterbalance valve attachment screw and elastic washer, it is made to pacify with valve body
It is fitted together, so far completes the installation of counterbalance valve；Transit joint is connected to the fine thread hole on counterbalance valve upper end cover again
On, it is sequentially connected with transit joint, connection four-way and accumulator liquid outlet；Four-way left port connects pressure sensor, and right output port goes out
Mouth is sequentially connected with hydraulic system again by pipe fitting and pipeline, and filling for accumulator hydraulic cavities is controlled by three-position four-way electromagnetic directional valve
Pressure or release, and constitute hydraulic control circuit with accumulator, hydraulic pump, overflow valve, check valve, fuel tank and pipeline etc.；So far then
Complete the integral installation of the present invention.
The following further describes the present invention with reference to the drawings：
As shown in Figure 1, Figure 2 and Figure 3, this back pressure apparatus agent structure, including accumulator 1, connection four-way 2, transit joint 3, on
End connector 4, counterbalance valve 5 and outlet connection 6；Wherein the counterbalance valve 5 includes counterbalance valve upper end cover 7, back pressure valve body 8, the back of the body again
Pressure valve bottom end cover 9, counterbalance valve end cap attachment screw 10, counterbalance valve valve pocket 11, back pressure valve core 12, counterbalance valve valve pocket sealing ring
13, counterbalance valve valve pocket baffle ring 14, back pressure valve core composite rim 15, counterbalance valve end cap seal circle 16, elastic washer 17.
As shown in Figure 4 and Figure 5, the counterbalance valve upper end cover 7 includes for counterbalance valve and external structure installation connection
Threaded hole cooperation on uniformly distributed counterbalance valve installation threaded hole 18 and valve body, the uniformly distributed counterbalance valve upper end for end cap installation
Lid soket head cap screw counter sink 19 for installing end cap sealing ring, and is constituted with valve body inner cylinder face on the counterbalance valve of static seal
End cap seal groove 20, the counterbalance valve upper end cover valve pocket mounting plane 21 fixed and positioned for valve pocket, counterbalance valve upper end cover valve
Mounting hole 22 and counterbalance valve upper end cover inner cylinder face chamfering 23 are covered, counterbalance valve upper end cover external cylindrical surface chamfering 24 is for the ease of end
The installation of lid, counterbalance valve upper end cover mounting plane 25 coordinate with valve body upper end cover cooperation plane 32, counterbalance valve upper end cover closely-pitched spiral shell
Pit 26 is used to install with upper end connector 4 and connect.
As shown in Figure 6 and Figure 7, the back pressure valve body 8 is designed with counterbalance valve valve outlet plane 27 and is connect convenient for outlet
The installation of head or pipeline, counterbalance valve valve outlet threaded hole 28 is used for connecting pipeline, using fine thread structure, back pressure valve body
Interior cylindrical hole 29 provides liquid overcurrent chamber for installing valve pocket etc., back pressure valve body inner cylinder face chamfering 30 be for the ease of
The installation of upper and lower end cap, back pressure valve body upper end cover coordinate plane 32 and counterbalance valve valve body lower end lid cooperation plane 33 respectively at
Upper and lower end cap mounting plane cooperation, alignment back pressure valve body installs threaded hole 31, and passes through 10 He of counterbalance valve end cap attachment screw
Elastic washer 17 connects.
As shown in Figure 8 and Figure 9, the counterbalance valve bottom end cover 9 is designed with coordinates with the threaded hole on valve body, is used for end cap
The uniformly distributed counterbalance valve bottom end cover soket head cap screw counter sink 34 of installation, counterbalance valve bottom end cover mounting plane 35 are matched with valve body lower end lid
It closes plane 33 to coordinate, be sealed for installing end cap sealing ring, and with the counterbalance valve upper end cover of valve body inner cylinder face composition static seal
Groove 36, convenient for the counterbalance valve bottom end cover external cylindrical surface chamfering 37 of end cap installation, under the counterbalance valve fixed and positioned for valve pocket
End cap valve pocket mounting hole 38, counterbalance valve bottom end cover inner cylinder face chamfering 39 and counterbalance valve bottom end cover valve pocket mounting plane 40, back pressure
Valve bottom end cover import threaded hole 41 is used to install with feed liquor pipeline and connect.
As shown in Figure 10 and Figure 11, it is designed on the 11 both ends external cylindrical surface of counterbalance valve valve pocket for installing back pressure
The counterbalance valve valve pocket sealed groove 42 of valve valve pocket sealing ring 13 and counterbalance valve valve pocket baffle ring 14, convenient for the counterbalance valve of the installation of valve pocket
Valve pocket external cylindrical surface chamfering 43, lower end sealed groove top external cylindrical surface wound are designed with the uniformly distributed counterbalance valve valve pocket for overcurrent
Axial rectangular window 44, under counterbalance valve valve pocket on mounting plane 45 and counterbalance valve valve pocket mounting plane 46 respectively with counterbalance valve lower end
Lid mounting plane 40 and counterbalance valve upper end cover valve pocket mounting plane 21 coordinate, and cylindrical hole 47 is rough surface in counterbalance valve valve pocket
Extremely low cylindrical surface is spent, is coordinated with counterbalance valve spool cylindrical surface 52, dynamic sealing, back pressure are formed in conjunction with back pressure valve core composite rim 15
Valve valve pocket inner cylinder face chamfering 48 is for the ease of the installation of back pressure valve core 12.
As shown in figure 12, there are two for installing counterbalance valve valve for design on the 12 upper end external cylindrical surface of back pressure valve core
It is close to be designed with several adjacent back pressure valve cores on the external cylindrical surface of lower end for the counterbalance valve seal spool groove 49 of core composite rim 15
It seals groove 50 and valve pocket inner cylinder face forms clearance seal, upper and lower two back pressures valve core external cylindrical surface chamfering 51 is then in order to just
It is moved upwards in installation and spool, counterbalance valve spool cylindrical surface 52 and the cooperation of valve pocket inner cylinder face, are that surface roughness is lower
Cylindrical surface.
As shown in figure 13, the present invention connects four-way upper port and connects accumulator, and lower port connects counterbalance valve, left port connection
Pressure sensor, right output port connect hydraulic system, increase system pressure, and three-position four-way valve when adjusting overflow valve in hydraulic system
When positioned at left position, spool epicoele fluid pressure increases, the accumulator pressurizing being connected to hydraulic system, gas compression in air bag, into
Row pressure compensation reduces system pressure when adjusting in hydraulic system overflow valve, while when three-position four-way valve is located at right position, on spool
Cavity pressure reduces, accumulator release, the gas expansion of compression, pressure compensation is carried out, due to the pressure balance of spool upper and lower end face, valve
Core cavity of resorption is controlled fluid pressure and changes in company with upper cavity pressure and change, the two approximately equal, and then can be by controlling on spool
End control cavity pressure provides more stable back pressure for the controlled fluid being connected to cavity of resorption.
Above-mentioned each component connection relation：
The remote control liquid gas balance high-pressure high-flow back pressure apparatus first on the basis of back pressure valve body 8, will install valve
Set sealing ring 13, valve pocket baffle ring 14 counterbalance valve valve pocket 11 installed under the counterbalance valve of counterbalance valve end cap seal circle 16
On end cap 9, the back pressure valve core 12 for installing back pressure valve core composite rim 15 is slowly fitted into valve pocket 11 from top to bottom, then
By the counterbalance valve bottom end cover 9 being installed together with valve pocket 11 slowly in valve body 8, under bottom end cover mounting plane 33 and valve body
Mounting plane 45 coordinates, then the counterbalance valve upper end cover 7 for installing counterbalance valve end cap seal circle 16 is mounted on to the upper surface of valve body
On 32, it is made to coordinate with mounting plane on valve body 46；It respectively will the back of the body by counterbalance valve end cap attachment screw 10 and elastic washer 17
The upper and lower end cap of pressure valve compresses sealing, so that it is installed together with valve body, so far completes the installation of counterbalance valve 5；Again by upper termination
First 4 are connected on the fine thread hole 26 on counterbalance valve upper end cover, are sequentially connected with transit joint 3, connection four-way 2 and accumulator 1
Liquid outlet；The outlet of four-way right output port is sequentially connected with external hydraulic system again by pipe fitting and pipeline, is changed by 3-position 4-way electromagnetism
Accumulator pressurizing/release is controlled to valve, and hydraulic pressure is constituted with accumulator, hydraulic pump, overflow valve, check valve, fuel tank and pipeline etc.
Circulation loop, accumulator can stablize the pressure of spool upper end liquid control chamber, play the role of pressure compensation；Four-way left port connects
Pressure sensor is connect, controlled fluid magnitude of back pressure is jointly controlled with hydraulic system by signal feedback；So far this hair is then completed
Bright whole installations.
The present apparatus is installing before use, need to counterbalance valve be passed in and out valve port pipeline and be correspondingly connected with, and can be connected out when needing
Mouth connector 6, passes through the feedback signal for the pressure combination pressure sensor for adjusting hydraulic system, adjusts controlled fluid magnitude of back pressure；
In use, by back pressure valve core composite rim 15, counterbalance valve valve pocket sealing ring 13 and counterbalance valve valve pocket baffle ring 14 by 1 and of accumulator
5 fluid chamber of counterbalance valve is isolated into two independent seal chambers, and 12 upper end of spool is communicated with accumulator hydraulic port, lower end and counterbalance valve
Connected controlled fluid communicates, and can be axially moved in valve pocket 11, the dynamic balance relation due to spool and upper and lower end face face
Product is equal, therefore 12 upper and lower end face pressure balance of spool, phase approximate with the fluid pressure of two chambers up and down of spool upper and lower end face unicom
Deng.
The backpressure regulation principle and method of the present apparatus be：Hydraulic system overflow valve and three position four-way directional control valve are adjusted, when making
When system oil pressure rises, while oil inlet oil circuit is connected, and fluid enters accumulator hydraulic cavities, and gas is compressed in accumulator, accumulation of energy
Device control chamber liquid pressure rise is also risen due to the dynamic balance relation of back pressure spool with the spool cavity of resorption back pressure of controlled liquid communication
It is high；When making system oil pressure decline, gas expansion in accumulator, while emptying oil circuit is connected, and the fluid in accumulator is led to
It crosses three position four-way directional control valve and is discharged into hydraulic circuit, accumulator control chamber liquid decompression, since the dynamic balance of back pressure spool is closed
System, also reduces with the spool cavity of resorption back pressure of controlled liquid communication.
The back pressure stability principle and method of the present apparatus be：When control chamber adjusting reaches the back pressure value of setting, three are closed
Four-way reversing valve channel, accumulator control chamber liquid are closed, and are acted on by the pressure compensation of accumulator, can be remained storage
Energy device control chamber fluid pressure is stablized in the section of setting.When controlling fluid flow increase, back pressure spool needs to exercise
Flow channels increase, and gas is compressed in accumulator at this time, has been conceded spool and has been moved up the accumulator control chamber fluid space accounted for,
Keep control chamber fluid pressure basicly stable；When controlling fluid flow reduction, back pressure spool needs lower flow channels of exercising to subtract
Small, gas expansion in accumulator, the accumulator control chamber fluid space vacated is moved down supplemented with spool at this time, keeps control chamber liquid
Body pressure is basicly stable.
The back pressure apparatus control principle and method of the present apparatus be：Pass through hydraulic system overflow valve, three position four-way directional control valve, list
Jointly controlled to valve, hydraulic control one-way valve and pressure sensor.Regulation relief valve can increase or decrease accumulator liquid
The pressure of control chamber, and then export required magnitude of back pressure；The oil stream direction that three position four-way directional control valve changes hydraulic circuit is manipulated, it can
To realize the filling liquid and return hydraulic control of accumulator liquid control chamber, when reversal valve is in left position, hydraulic system oil inlet oil circuit is led
Logical, hydraulic control one-way valve forward conduction, pressure oil enters accumulator pressurizing, and is closed when controlling cavity pressure and reaching setup pressure value
Reversal valve is at middle position, and system pressurize, the upper end control cavity pressure being connected to spool also will be in the vapor liquid equilibrium of accumulator
It is maintained at setting value under pressure stabilization function；When reversal valve is in right position, the control chamber of hydraulic control one-way valve, which leads to high pressure, makes it reversely lead
Logical, hydraulic system unloads oil return line conducting, and accumulator control chamber liquid unloads oil return box, pressure reduction；Utilize pressure sensor monitoring
Control pressure simultaneously exports feedback signal to control system, may be implemented to the accurate of the back pressure apparatus by the adjusting of control system
Adjusting and remote control, to meet high pressure, the adjusting of big flow liquid back pressure and stability contorting demand.
Claims (1)
1. a kind of remote control liquid gas balances high-pressure high-flow back pressure apparatus, including counterbalance valve, it is characterised in that：Described device is also
Including accumulator, connection four-way, transit joint, upper end connector and outlet connection；
The counterbalance valve includes upper end cover, bottom end cover, valve body, valve pocket, spool, end cap seal circle, valve pocket sealing ring, valve pocket gear
Circle, spool combined seal ring and counterbalance valve attachment screw and elastic washer；
It is useful for the uniformly distributed threaded hole of installation connection and uniformly distributed soket head cap screw counterbore on the upper end cover, is used for and valve body
Installation connection；There is sealing ring installing groove on the outside cylinder sealing surface of the upper end cover, for installing the end cap seal circle, and
Coordinate with valve interior surface and constitutes static seal；There is external cylindrical surface chamfering on the upper end cover；The upper end cover is along central axis
The installation interior column sealed face of valve pocket, valve pocket mounting plane and the transition installed convenient for valve pocket sealing ring is useful on direction to fall
Angle, for the fixed and positioned of valve pocket；The fine thread of end connector in connection accumulator control chamber is useful on the upper end cover
Structure；
There is uniformly distributed soket head cap screw counterbore on the bottom end cover, for being fixedly connected with valve body；The outside cylinder of the bottom end cover
There is sealing ring installing groove on sealing surface, for installing counterbalance valve end cap seal circle, and it is quiet close with valve interior surface cooperation composition
Envelope；There is external cylindrical surface chamfering on the bottom end cover；The bottom end cover upper edge central axial direction is useful for the inner circle of installation valve pocket
Column sealing face, valve pocket mounting plane and the transition chamfering convenient for the installation of valve pocket sealing ring；It is useful for connecting on the bottom end cover
The fine thread structure of lower end inlet connector；
The valve body both sides of the face have uniformly distributed threaded hole corresponding with the upper and lower end cap, for and counterbalance valve upper and lower end
Lid passes through the connection installation of counterbalance valve attachment screw；Be provided in the central axial direction of the valve body back pressure valve body central through hole and
Convenient for the transition chamfering of the upper and lower end cap sealing ring installation of counterbalance valve；The valve body has fine thread on axis direction
The liquid outlet of structure, and the installation sealing plane convenient for the connection of outlet tube line；
The valve pocket is class cylinder cylindrical structure, and the external cylindrical surface upper/lower terminal of the valve pocket is all provided with sealing ring installing groove,
For installing valve pocket sealing ring and valve pocket baffle ring；The axis direction upper/lower terminal of the valve pocket has the chamfering installed convenient for spool；
Have above the lower end external cylindrical surface sealed groove of the valve pocket it is uniformly distributed for fluid by rectangular window；
There are two sealing ring installing grooves on the external cylindrical surface of the spool upper end, for installing spool combined seal ring, to realize
Isolating seal is realized to hydraulic control chamber and fluid media (medium) chamber；Have on the external cylindrical surface of the spool lower end and press slot, with valve pocket
Inner cylinder face constitutes clearance seal；The upper and lower end face area equation of the spool；
The spool upper end of the counterbalance valve is communicated with accumulator hydraulic control chamber, and spool lower end and controlled fluid communication, spool exist
It may be implemented to be axially moved in valve pocket, top is limited by counterbalance valve upper end cover structure, and lower section is by counterbalance valve bottom end cover structure
It is limited, flows to form the fluid channel for keeping required back pressure to realize the spool according to liquid；
The counterbalance valve and accumulator are connected by connecting four-way；The connection four-way upper port connects accumulator, plays pressure
Compensation, the effect for stablizing spool upper cavity pressure；The connection four-way lower port connects counterbalance valve by transit joint；The connection
Four-way left port connects pressure sensor, detects control pressure and feeds back to control system for monitoring system control pressure；Institute
Connection four-way right output port connection external hydraulic system is stated, the pressure of adjusting spool upper end liquid control chamber is used for, passes through hydraulic pressure system
Combined pressure force sensor signals feedback under unified central planning, jointly controls this back pressure apparatus.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810131660.1A CN108386402B (en) | 2018-02-09 | 2018-02-09 | A kind of long-range control liquid gas balance high-pressure high-flow back pressure apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810131660.1A CN108386402B (en) | 2018-02-09 | 2018-02-09 | A kind of long-range control liquid gas balance high-pressure high-flow back pressure apparatus |
Publications (2)
| Publication Number | Publication Date |
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| CN108386402A true CN108386402A (en) | 2018-08-10 |
| CN108386402B CN108386402B (en) | 2019-10-29 |
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| CN201810131660.1A Expired - Fee Related CN108386402B (en) | 2018-02-09 | 2018-02-09 | A kind of long-range control liquid gas balance high-pressure high-flow back pressure apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114791050A (en) * | 2022-04-21 | 2022-07-26 | 欧世盛（北京）科技有限公司 | Automatic back pressure valve and fluid metering and adding system |
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| US20060233912A1 (en) * | 2005-04-19 | 2006-10-19 | Krauss-Maffei Kunststofftechnik Gmbh | Hydraulic mold clamping unit |
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| CN202733127U (en) * | 2012-07-13 | 2013-02-13 | 中国舰船研究设计中心 | Marine hydraulic valve on-off control hydraulic system |
| CN203548375U (en) * | 2013-09-30 | 2014-04-16 | 北京市三一重机有限公司 | Hydraulic pipe winding system and engineering machinery |
| CN105332966A (en) * | 2015-12-09 | 2016-02-17 | 东北石油大学 | High pressure unloading valve for hydraulic driving hydrostatic test |
| CN106640799A (en) * | 2017-02-16 | 2017-05-10 | 数源科技股份有限公司 | Energy-saving type loading system of pure electric compression garbage truck |
| CN107269614A (en) * | 2017-06-28 | 2017-10-20 | 西南交通大学 | A kind of four-quadrant hydraulic loading system |
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| US20060233912A1 (en) * | 2005-04-19 | 2006-10-19 | Krauss-Maffei Kunststofftechnik Gmbh | Hydraulic mold clamping unit |
| CN100999129A (en) * | 2006-12-30 | 2007-07-18 | 浙江大学 | Water moulding water-fluid pressure ratio system |
| CN202733127U (en) * | 2012-07-13 | 2013-02-13 | 中国舰船研究设计中心 | Marine hydraulic valve on-off control hydraulic system |
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| CN105332966A (en) * | 2015-12-09 | 2016-02-17 | 东北石油大学 | High pressure unloading valve for hydraulic driving hydrostatic test |
| CN106640799A (en) * | 2017-02-16 | 2017-05-10 | 数源科技股份有限公司 | Energy-saving type loading system of pure electric compression garbage truck |
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| CN108386402B (en) | 2019-10-29 |
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