CN108547812A - Pilot-operated type flow valve - Google Patents
Pilot-operated type flow valve Download PDFInfo
- Publication number
- CN108547812A CN108547812A CN201810375725.7A CN201810375725A CN108547812A CN 108547812 A CN108547812 A CN 108547812A CN 201810375725 A CN201810375725 A CN 201810375725A CN 108547812 A CN108547812 A CN 108547812A
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- China
- Prior art keywords
- valve
- valve plug
- valve opening
- pilot
- compressing chamber
- Prior art date
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- Granted
Links
- 230000000903 blocking effect Effects 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 claims description 50
- 239000010720 hydraulic oil Substances 0.000 claims description 41
- 239000012530 fluid Substances 0.000 claims description 2
- 238000013016 damping Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Classifications
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/363—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/40—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
- F16K31/406—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor acting on a piston
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a kind of pilot-operated type flow valves, including：Valve body；Fixed valve plug；Movable valve plug；Actuator.The both sides of movable valve plug are respectively formed with the first compressing chamber and the second compressing chamber；The first passage for being respectively communicated with the first compressing chamber and the second compressing chamber is offered on spool；Oil inlet is connected to the first compressing chamber；The second valve opening of connection the first compressing chamber and oil outlet is further opened on spool；When movable valve plug is in the position for closing the first valve opening, mobile bar so that blocking core blocks the second valve opening, and when needing to open the first valve opening, mobile bar to block core far from the second valve opening.For the present invention by the way that the second valve opening is arranged, the thrust for reducing movable valve plug both sides is poor so that the movable valve plug being closed is opened more easily by actuator, this certainly will reduce the requirement for the maximum actuation force that can apply to actuator.
Description
Technical field
The present invention relates to technical field of hydraulic pressure, more particularly to a kind of pilot-operated type flow valve.
Background technology
Hydraulic system generally includes fuel tank, dynamical element (such as hydraulic pump), control element (such as overflow valve, reversal valve, stream
Measure valve etc.), executive component (such as oil cylinder, motor) and the fluid pressure line for connecting these elements.Wherein, control element is for controlling
Pressure, flow direction and flow of hydraulic oil processed etc., to meet the requirement of executive component.
Flow valve is chiefly used in controlling the movement speed of executive component, and flow valve tool is there are three state, that is, closed state, most
Big opening state and intermediate opening state.The closed state of flow valve is for blocking hydraulic oil to pass through flow valve, to limit liquid
Pressure oil enters executive component；Flow valve is in intermediate opening state, for adjusting the flow of hydraulic oil to adjust executive component
Speed；Flow valve allows the maximum flow that hydraulic oil passes through flow valve in maximum opening state.
Above-mentioned three kinds of states of flow valve by spool mobile realization, specifically, when spool is moved to an extreme position,
Spool closes the entrance of flow valve；When spool is moved to another extreme position, spool makes the entrance of flow valve beat completely
It opens；When spool is when two extreme positions move, spool is by the mobile aperture for adjusting entrance, to control the stream of hydraulic oil
Amount.
Occurs a kind of flow valve with above-mentioned three kinds of states in the prior art, which specifically includes valve body, valve
Core and actuator；Valve body has entrance and exit；Spool can be slided in valve body to block entrance or entrance is made to open；
The structure matching of valve body and spool at：(so-called forced area refers to forced area of the spool on the direction that it closes entrance
By hydraulic oil oppress area) be more than spool its open Way on forced area (offered on spool axially through
Through-hole so that hydraulic oil oppresses two forced areas respectively), this make spool be not affected by actuator driving when, spool
It is always at the extreme position for closing entrance, and generates that certain pressure is poor, which makes spool because of forced area difference
It is maintained at the extreme position with certain pretightning force.
Defect is possessed by above-mentioned flow valve：When need to make flow valve from closed state switch to intermediate opening state or
When person's maximum opening state, actuator needs powerful power to overcome pretightning force, and needs to make spool move with the powerful power
A distance, this certainly will propose the actuation capability of actuator high requirement so that actuator must have higher actuating
Power overcomes the requirement of pretightning force to meet.
Invention content
For the above-mentioned technical problems in the prior art, the embodiment provides a kind of pilot-operated type flows
Valve.
In order to solve the above technical problems, the embodiment of the present invention the technical solution adopted is that：
A kind of pilot-operated type flow valve, including：
Valve body, with pilot hole, oil inlet, oil outlet；The outlet oil is formed in the first end of the pilot hole；Institute
It states oil inlet and radially penetrates through the pilot hole and close to its first end；
Fixed valve plug is fixed on the first end of the valve body and stretches in the pilot hole；It is opened up on the fixed valve plug
There are the first valve opening, first valve opening to be connected to the oil outlet；
Movable valve plug is sheathed on the fixed valve plug and closes first valve opening by mobile or make described first
Valve opening is opened and is connected to the oil inlet and the oil outlet；
Actuator, the closure core for including at least a mobile bar and being moved with the mobile bar；Wherein：
The both sides of the movable valve plug are respectively formed with the first compressing chamber and the second compressing chamber；Difference is offered on the spool
It is connected to the first passage of the first compressing chamber and the second compressing chamber；The oil inlet is connected to the first compressing chamber,
And make by oil inlet enter described second oppress the hydraulic oil of chamber to the active area of the spool be more than by oil inlet into
Enter active area of the hydraulic oil to the spool of the first compressing chamber；
The second valve opening for being connected to the first compressing chamber and the oil outlet is further opened on the spool；When the dynamic valve
When core is in the position for closing first valve opening, the mobile bar makes the closure core block second valve opening, and works as
When needing to open first valve opening, the mobile bar makes the closure core far from second valve opening.
Preferably, one end of the first end of the movable valve plug and the fixed valve plug far from the valve body forms blind end, institute
The blind end for stating movable valve plug and the fixed valve plug surrounds third compressing chamber；Second valve opening is opened in the closing of the movable valve plug
So that the second compressing chamber and third compressing chamber perforation on end；Wherein：
The blind end of the fixed valve plug offers second channel to be connected to the third compressing chamber and the oil outlet.
Preferably,
The side of the blind end of the movable valve plug towards the drive rod offers deep gouge；The end set of the drive rod
There is piston, the piston, which is set in the guide groove and is covered by end cap, to be taken off to limit the piston from the deep gouge
Go out；
It is respectively arranged with the first spring and second spring in the deep gouge of the piston both sides；
It is arranged with closure disk on the drive rod, the closure core is arranged in the closure disk towards the one of the movable valve plug
Side, second valve opening are opened in the position opposite with the closure core；
The blind end of the movable valve plug is provided with guide rod towards the side for blocking disk, and the guide rod wears described
It blocks disk and is rotated with limiting the closure disk；
The piston offer axially through flowing hole.
Preferably, second valve opening includes multiple, and multiple second valve openings are circumferentially；It is arranged on the closure disk
Have and blocks core correspondingly with second valve opening.
Preferably, the actuator further include the framework being set on the valve body, the electromagnetism that is installed in the framework
Iron and third spring for pushing against the drive rod；Wherein：
The drive rod at least has one section of magnetic sections to form an electromagnetic force with the electromagnet of energization.
Preferably, one section of damping hole is at least formed in the first passage.
Preferably, one section of damping hole is at least formed in the second channel.
Preferably, the second end of the valve body is provided with end cap, and the middle part of the end cap is worn threadably
There is adjusting nut；The third spring is located in the pilot hole and both ends are supported with the drive rod and the adjusting nut respectively
It leans on.
Preferably, the fixed valve plug is shaped in the inside of the valve body.
Compared with prior art, the advantageous effect of pilot-operated type flow valve disclosed by the invention is：The present invention passes through setting the
Two valve openings, the thrust for reducing movable valve plug both sides are poor so that and the movable valve plug being closed is opened more easily by actuator,
This certainly will reduce the requirement for the maximum actuation force that can apply to actuator.
Description of the drawings
The pilot-operated type flow valve that Fig. 1 is provided by the embodiment of the present invention front view (the second valve opening is closed,
And first valve opening be also at closed state).
Fig. 2 is the enlarged view of the local A of Fig. 1.
The pilot-operated type flow valve that Fig. 3 is provided by the embodiment of the present invention front view (the second valve opening is in the open state,
And first valve opening be also at closed state).
Fig. 4 is the enlarged view of the local B of Fig. 3.
The pilot-operated type flow valve that Fig. 5 is provided by the embodiment of the present invention front view (the second valve opening is in the open state,
And first valve opening be also at opening state).
Fig. 6 is the enlarged view of the Local C of Fig. 5.
In figure：
10- valve bodies；11- oil inlets；12- oil outlets；13- pilot holes；20- fixed valve plugs；21- blind ends；22- second is logical
Road；The first valve openings of 23-；24- vessels；30- movable valve plugs；31- blind ends；311- deep gouges；32- first passages；The second valve openings of 33-；
40- blocks disk；41- blocks core；42- guide rods；50- actuators；51- mobile bars；52- frameworks；53- electromagnet；54- third bullets
Spring；55- adjusts lid；56- adjusting nuts；57- pistons；The first springs of 571-；572- second springs；573- flowing holes；The ends 58-
Lid；60- first oppresses chamber；70- second oppresses chamber；80- thirds oppress chamber.
Specific implementation mode
To make those skilled in the art be better understood from technical scheme of the present invention, below in conjunction with the accompanying drawings and specific embodiment party
Formula elaborates to the present invention.
As shown in Figures 1 to 6, the embodiment of the present invention discloses a kind of pilot-operated type flow valve, which is used for
The flow of hydraulic oil is controlled, and then achievees the purpose that control executive component.The pilot-operated type flow valve includes valve body 10, fixed valve plug
20, movable valve plug 30 and actuator 50.Wherein, valve body 10 has pilot hole 13, oil inlet 11, oil outlet 12；Pilot hole 13 passes through
Valve body 10 is worn, outlet oil is formed in the first end of pilot hole 13, that is, the first end of valve body 10；The radial perforation of oil inlet 11 is oriented to
Hole 13 and its close first end；Fixed valve plug 20 is fixed on the first end of valve body 10 and stretches in pilot hole 13；On fixed valve plug 20
The first valve opening 23 is offered, the first valve opening 23 is connected to oil outlet 12；Movable valve plug 30 is sheathed on fixed valve plug 20 and passes through movement
It is connected to oil inlet 11 and oil outlet 12 close the first valve opening 23 or the first valve opening 23 to be made to open；Actuator 50, at least
The closure core 41 moved including a mobile bar 51 and with mobile bar 51；Wherein：The both sides of movable valve plug 30 are respectively formed with
One compressing chamber 60 and second oppresses chamber 70；It is offered on spool and is respectively communicated with the first of the first compressing chamber 60 and second compressing chamber 70
Channel 32；Oil inlet 11 is connected to the first compressing chamber 60, and makes the hydraulic oil pair for entering the second compressing chamber 70 by oil inlet 11
The active area of spool is more than active area of the hydraulic oil to spool for entering the first compressing chamber 60 by oil inlet 11；On spool
It is further opened with the second valve opening 33 of connection the first compressing chamber 60 and oil outlet 12；The first valve opening 23 is closed when movable valve plug 30 is in
When position, mobile bar 51 blocks the second valve opening 33 so that blocking core 41, and when needing to open the first valve opening 23, mobile bar 51 makes
Core 41 must be blocked far from the second valve opening 33.Preferably, fixed valve plug 20 is shaped in the inside of valve body 10.
The course of work of the pilot-operated type flow valve disclosed in the above embodiment of the present invention is described below, and comes whereby
Illustrate the pilot-operated type flow valve of the present invention compared to advantage possessed by the mentioned flow valve in background technology.
Need close flow valve when, that is, need by oil outlet 12 (with executing agency, such as oil cylinder connect) with oil inlet 11 (with
Actuating unit, such as pump connection) partition when, as depicted in figs. 1 and 2, first by machine power or electromagnetic force mobile bar 51, make
Core 41 must be blocked to block the second valve opening 33, at this point, oppressing chamber 60 due to the second compressing chamber 70 and first passes through first passage 32
It is connected to, the pressure of the hydraulic oil in the second compressing chamber 70 and the hydraulic oil in the first compressing chamber 60 is of substantially equal, however, the second chamber
Indoor hydraulic oil is more than the hydraulic oil in first chamber to the active area of movable valve plug 30 to the active area of movable valve plug 30, makes
The thrust that the hydraulic oil in second chamber is more than the hydraulic oil in first chamber to movable valve plug 30 to the thrust of movable valve plug 30 is obtained, from
And it is poor to form thrust, in this way, movable valve plug 30 can towards closing the movement of 23 direction of the first valve opening and the first valve opening of final plant closure 23, and with
The catching step of valve body 10 leans.Movable valve plug 30 eventually by close the first valve opening 23 and by oil inlet 11 and oil outlet 12 every
It is disconnected, it is flowed out from oil outlet 12 at this point, not having hydraulic oil.
When needing to open flow valve, that is, (certainly, opening when needing that oil outlet 12 is made to be connected to oil inlet 11
Both flow valve can have been instigated to realize maximum opening state, flow valve can also be made to realize intermediate opening state for adjusting hydraulic pressure
The flow of oil), make mobile bar 51 drives to block core 41 towards the direction far from the second valve opening 33 using mechanical force or electromagnetic force
A small distance is moved first, to make the second valve opening 33 open, in this way, the hydraulic oil in second chamber can pass through the second valve
Hole 33 is flowed out, and is finally discharged through oil outlet 12, while the hydraulic oil in second chamber is flowed out from the second valve opening 33, second
The pressure of the indoor hydraulic oil of chamber becomes smaller, this makes the hydraulic oil in second chamber become smaller 30 thrust of movable valve plug, to make
Thrust difference in the both direction of movable valve plug 30 is smaller so that the actuator 50 with machine power or electromagnetic force is relatively existing
Flow valve in technology is easier that movable valve plug 30 is made to move towards the direction for making the first valve opening 23 open.
According to it is above-mentioned can be with, for the present invention by the way that the second valve opening 33 is arranged, the thrust for reducing 30 both sides of movable valve plug is poor so that
The movable valve plug 30 being closed is opened more easily by actuator 50, this, which certainly will be reduced, can apply actuator 50
Maximum actuation force requirement.
It should be noted that：The passage section of first passage 32 is less than the passage section of the second valve opening 33 to ensure the second chamber
Indoor hydraulic oil is mainly flowed out by first passage 32.
In a preferred embodiment of the invention, as shown in Figures 1 to 6, movable valve plug 30 and fixed valve plug 20 are far from valve body
The blind end of one end formation blind end 31,21 of 10 first end, movable valve plug 30 and fixed valve plug 20 surrounds third compressing chamber 80；The
Two valve openings are opened on the blind end 31 of movable valve plug 30 so that the second compressing chamber 70 is penetrated through with third compressing chamber 80；Wherein：Determine valve
The blind end 21 of core 20 offers second channel 22 to be connected to third compressing chamber 80 and oil outlet 12.
The flow valve for being formed with third compressing chamber 80 is described below compared to the flow valve that third chamber is not formed
Advantage.
When needing to open flow valve, as shown in Figure 3 and Figure 4, make 51 band of mobile bar using mechanical force or electromagnetic force
The dynamic core 41 that blocks moves a small distance first towards the direction far from the second valve opening 33, to make the second valve opening 33 open, in this way
Hydraulic oil in second chamber can flow into third chamber by the second valve opening 33, in this way, the pressure of the indoor hydraulic oil of third chamber
Power increases so that the indoor hydraulic oil of third chamber is to the hydraulic oil in the thrust and first chamber of movable valve plug 30 to movable valve plug 30
The sum of thrust is more than the hydraulic oil in second chamber to the thrust of movable valve plug 30, in this way, under the promotion of hydraulic oil, such as Fig. 5 and
Shown in Fig. 6, movable valve plug 30 can be automatically towards the direction movement for making the first valve port open, this can make actuator 50 in the first valve opening 23
Minimum even without force is become to the power applied needed for movable valve plug 30 in opening direction, movable valve plug 30 is just with following mobile bar
51 movements.
It should be noted that：The passage section of second channel 22 should be less than the passage section of the second valve opening 33 to ensure
Two valve openings 33 can make the thrust that third compressing chamber 80 and first oppresses the hydraulic oil in chamber 60 to movable valve plug 30 when opening completely
More than the hydraulic oil in second chamber to the thrust of movable valve plug 30.
As described above, can be realized without using actuator by the maximum passage section for rationally designing the second valve opening 33
50 forces can make the purpose that movable valve plug 30 is moved towards opening direction.
As described above, e.g. can be by making the second valve by the maximum passage section for rationally designing the second valve opening 33
The maximum passage section in hole 33 is big as possible and actuator 50 is made movable valve plug 30 can be made to open the first valve opening 23 without force, right
Ying Di, the embodiment provides a kind of movable valve plugs 30, and there is no the flow valves of connection relation with mobile bar 51, specifically,
Above-mentioned closure core 41 is arranged towards one end of the blind end 31 of movable valve plug 30 in mobile bar 51, mobile bar 51 and movable valve plug 30 without
Any connection, in this way so that the maximum passage section of the second valve opening 33 is big as possible, is arranged in flow valve opening procedure
In, movable valve plug 30 follows the degree that mobile bar 51 moves.In this way, driver only need drive mobile bar 51 be directly moved to it is specified
Axial position, without forcing in movable valve plug 30.
The flow valve that above-described embodiment is provided can be made by keeping the maximum passage section of the second valve opening 33 big as possible
Actuator 50 is obtained without driving movable valve plug 30 that can realize that movable valve plug 30 is automatically moved into designated position.However, making mobile bar 51
Not forming connection relation with movable valve plug 30, there are many problems, for example, when actuator 50 drives the speed of mobile bar 51 slow
In the movement speed of movable valve plug 30, movable valve plug 30 is impacted because inertia may be generated with mobile bar 51, or because of the speed of movable valve plug 30
Degree is more than the speed of mobile bar 51, and the distance both made constantly shortens, when foreshorten to influence the second valve opening 33 cannot be into
When the complete opening degree of row (movable valve plug 30 foreshortens to a certain degree with the distance between core 41 is blocked, the aperture of the second spool compared with
Small, limiting the passage section of the flow of hydraulic oil can reduce), the hydraulic oil in second chamber may be more than the thrust for moving core
First chamber is with the indoor hydraulic oil of third chamber to the sum of the thrust of movable valve plug 30, so that the speed of movable valve plug 30 is again rapid
Reduce, the opening speed so as to cause movable valve plug 30 fluctuates；For another example when actuator 50 drives 51 speed of mobile bar to be more than
Movable valve plug 30, and take the lead in being moved to designated position and it is static after, movable valve plug 30 can generate punching because of inertia and static mobile bar 51
It hits.
To solve the above problems, in a preferred embodiment of the invention, as shown in Fig. 2,4,6, and combining Fig. 1,3,5
Shown, the side of blind end 31 towards the drive rod of movable valve plug 30 offers deep gouge 311；The end set of mobile bar 51 has piston
57, piston 57 is set in guide groove and covers to deviate from from deep gouge 311 to limit piston 57 by end cap 58；57 both sides of piston
Deep gouge 311 in be respectively arranged with the first spring 571 and second spring 572；It is arranged in mobile bar 51 and blocks disk 40, block core
41 are arranged in closure disk 40 towards the side of movable valve plug 30, and the second valve opening 33 is opened in the position opposite with core 41 is blocked；Dynamic valve
The blind end 31 of core 30 is provided with guide rod 42 towards the side for blocking disk 40, and guide rod 42, which is worn, blocks disk 40 to limit closure
Disk 40 rotates；Piston 57 offer axially through flowing hole 573.
The above structure for enabling movable valve plug 30 to be connect with mobile bar 51 is described below because the two is not connected to be deposited
The technical issues of the reason of.
It is flexibly connected as described above, mobile bar 51 is realized with movable valve plug 30, in this way, when 30 speed of movable valve plug is less than
When the speed of mobile bar 51, mobile bar 51 generates dragging to movable valve plug 30, that is, movable valve plug 30 is forced in, when the speed of movable valve plug 30
When degree is more than mobile bar 51, mobile bar 51 generates the limitation of the movement speed to movable valve plug 30 at once, so that mobile bar 51
With movable valve plug 30 with minimum fluctuation synchronizing moving, so as to avoid impact is generated between mobile bar 51 and movable valve plug 30.
The advantage of above-described embodiment is：
1, when the speed of movable valve plug 30 starts the speed more than mobile bar 51, mobile bar 51 is right by the first spring 571
Movable valve plug 30, which generates, pushes against the speed decline so that movable valve plug 30, meanwhile, after the first spring 571 is pressurized, block disk 40 and dynamic valve
The Distance Shortened of core 30, in this way, blocking core 41 close to the second valve opening 33 so that subtracted by the flow of the hydraulic oil of the second valve opening 33
It is small, and then reduce hydraulic oil to movable valve plug 30 towards the thrust in opening direction, to which the first spring 571 of cooperation makes movable valve plug 30
Speed declines as early as possible.
2, when the speed of movable valve plug 30 starts the speed less than mobile bar 51, mobile bar 51 is right by second spring 572
Movable valve plug 30 generate it is mobile push against so that the speed of movable valve plug 30 is promoted, meanwhile, after second spring 572 is pressurized, block disk 40 with
The distance of movable valve plug 30 increases, in this way, blocking core 41 far from the second valve opening 33 so that pass through the stream of the hydraulic oil of the second valve opening 33
Amount increases, and then increases hydraulic oil to movable valve plug 30 towards the thrust in opening direction, to which the first spring 571 of cooperation makes movable valve plug
30 speed fast lifting.
3, the first spring 571 and second spring 572 are used not only for the impact between buffering movable valve plug 30 and mobile bar 51,
More importantly：First spring 571 and second spring 572 make to block the distance between core 41 and the second valve opening 33 by deformation
Variation meet the requirement consistent with 30 movement speed of movable valve plug to mobile bar 51.
4, it is more prone to the design of the maximum passage section of the second valve opening 33, the passage section design of the second valve opening 33
It is larger, smaller can be can be made up by the force of mobile bar 51.
Preferably, the second valve opening 33 includes multiple, and multiple second valve openings 33 are circumferentially；It blocks and is provided on disk 40 and the
Two valve openings 33 block core 41 correspondingly.
Preferably, the inside of fixed valve plug 20 offers vessel 24, the vessel 24 respectively with oil inlet 11 and second channel 22
Connection.
In a preferred embodiment of the invention, actuator 50 further includes the framework 52 being set on valve body 10, installing
In the electromagnet 53 in framework 52 and the third spring 54 for pushing against drive rod；Wherein：Drive rod at least has one section of magnetic
Property Duan Yiyu be powered electromagnet formed an electromagnetic force.In the present embodiment, mobile bar 51 is logical by changing by electromagnetism power drive
The size of electromagnetic force can be changed by entering the electric current of electromagnet 53, to adjust the movement velocity and power size of mobile bar 51.It is preferred that
Ground, the second end of valve body 10, which is provided with, adjusts lid 55, and the middle part for adjusting lid 55 is equipped with adjusting nut threadably
56；Third spring 54 be located in pilot hole 13 and both ends respectively with mobile bar 51 and adjusting nut 56 against.Pass through adjusting nut
The compression degree of 56 adjustable third springs 54, and then change the size that thrust is formed by resultant force with electromagnetic force.
Preferably, one section of damping hole is at least formed in first passage 32.One section of damping hole is at least formed in second channel 22.
Setting damping hole purpose is in the present embodiment：So that the passage section of first passage 32 and second channel 22 is less than the second valve
The passage section in hole 33
Above example is only exemplary embodiment of the present invention, is not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can within the spirit and scope of the present invention make respectively the present invention
Kind modification or equivalent replacement, this modification or equivalent replacement also should be regarded as being within the scope of the present invention.
Claims (9)
1. a kind of pilot-operated type flow valve, which is characterized in that
Valve body, with pilot hole, oil inlet, oil outlet；The outlet oil is formed in the first end of the pilot hole；It is described into
Hydraulic fluid port radially penetrates through the pilot hole and close to its first end；
Fixed valve plug is fixed on the first end of the valve body and stretches in the pilot hole；Is offered on the fixed valve plug
One valve opening, first valve opening are connected to the oil outlet；
Movable valve plug is sheathed on the fixed valve plug and closes first valve opening by mobile or make first valve opening
It opens and is connected to the oil inlet and the oil outlet；
Actuator, the closure core for including at least a mobile bar and being moved with the mobile bar；Wherein：
The both sides of the movable valve plug are respectively formed with the first compressing chamber and the second compressing chamber；It offers and is respectively communicated on the spool
The first passage of the first compressing chamber and the second compressing chamber；The oil inlet is connected to the first compressing chamber, and is made
The active area of the spool is more than by the hydraulic oil of oil inlet into the second compressing chamber, institute is entered by oil inlet
State active area of the hydraulic oil to the spool of the first compressing chamber；
The second valve opening for being connected to the first compressing chamber and the oil outlet is further opened on the spool；At the movable valve plug
When closing the position of first valve opening, the mobile bar makes the closure core block second valve opening, and when needs
When opening first valve opening, the mobile bar makes the closure core far from second valve opening.
2. pilot-operated type flow valve according to claim 1, which is characterized in that the movable valve plug and the fixed valve plug are far from institute
The one end for stating the first end of valve body forms blind end, and the blind end of the movable valve plug and the fixed valve plug surrounds third compressing chamber；
Second valve opening is opened on the blind end of the movable valve plug so that the second compressing chamber and third compressing chamber perforation；
Wherein：
The blind end of the fixed valve plug offers second channel to be connected to the third compressing chamber and the oil outlet.
3. pilot-operated type flow valve according to claim 2, which is characterized in that
The side of the blind end of the movable valve plug towards the drive rod offers deep gouge；The end set of the drive rod has work
Plug, the piston are set in the guide groove and cover by end cap to deviate from from the deep gouge to limit the piston；
It is respectively arranged with the first spring and second spring in the deep gouge of the piston both sides；
It is arranged with closure disk on the drive rod, the closure core is arranged in the closure disk towards the side of the movable valve plug,
Second valve opening is opened in the position opposite with the closure core；
The blind end of the movable valve plug is provided with guide rod towards the side for blocking disk, and the guide rod wears the closure
Disk is rotated with limiting the closure disk；
The piston offer axially through flowing hole.
4. pilot-operated type flow valve according to claim 3, which is characterized in that second valve opening includes multiple, Duo Gesuo
State the second valve opening circumferentially；It is provided on the closure disk and blocks core correspondingly with second valve opening.
5. pilot-operated type flow valve according to claim 1, which is characterized in that the actuator further includes being set in the valve
Framework on body, the electromagnet being installed in the framework and the third spring for pushing against the drive rod；Wherein：
The drive rod at least has one section of magnetic sections to form an electromagnetic force with the electromagnet of energization.
6. pilot-operated type flow valve according to claim 1, which is characterized in that at least form one section of resistance in the first passage
Buddhist nun hole.
7. pilot-operated type flow valve according to claim 2, which is characterized in that at least form one section of resistance in the second channel
Buddhist nun hole.
8. pilot-operated type flow valve according to claim 5, which is characterized in that the second end of the valve body is provided with end cap,
The middle part of the end cap is equipped with adjusting nut threadably；The third spring is located in the pilot hole and two
End respectively with the drive rod and the adjusting nut against.
9. pilot-operated type flow valve according to claim 1, which is characterized in that the fixed valve plug is shaped in the valve body
Inside.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810375725.7A CN108547812B (en) | 2018-04-25 | 2018-04-25 | Pilot-operated type flow valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810375725.7A CN108547812B (en) | 2018-04-25 | 2018-04-25 | Pilot-operated type flow valve |
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| Publication Number | Publication Date |
|---|---|
| CN108547812A true CN108547812A (en) | 2018-09-18 |
| CN108547812B CN108547812B (en) | 2019-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810375725.7A Active CN108547812B (en) | 2018-04-25 | 2018-04-25 | Pilot-operated type flow valve |
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| Country | Link |
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| CN (1) | CN108547812B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110559515A (en) * | 2019-09-09 | 2019-12-13 | 青岛大学附属医院 | drug delivery device for anesthetic |
| WO2021232505A1 (en) * | 2020-05-22 | 2021-11-25 | 杭州易超新能源汽车科技有限公司 | Novel combined valve |
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| EP0521485A2 (en) * | 1991-07-02 | 1993-01-07 | Bang Yan Wen | Automatic control valve with isolation device between pilot and main valve |
| CN205806568U (en) * | 2016-07-09 | 2016-12-14 | 常熟骏驰科技有限公司 | A kind of oil channel structures for oil pressure adjusting valve |
| CN107631065A (en) * | 2016-07-18 | 2018-01-26 | 鞍钢股份有限公司 | A kind of constant flow valve and its method of work |
| CN107725879A (en) * | 2017-10-19 | 2018-02-23 | 宁波文泽机电技术开发有限公司 | A kind of normally closed ratio one-way flow valves |
| CN107883028A (en) * | 2017-11-10 | 2018-04-06 | 宁波文泽机电技术开发有限公司 | The ratio one-way flow valves of double-direction control |
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2018
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0521485A2 (en) * | 1991-07-02 | 1993-01-07 | Bang Yan Wen | Automatic control valve with isolation device between pilot and main valve |
| CN205806568U (en) * | 2016-07-09 | 2016-12-14 | 常熟骏驰科技有限公司 | A kind of oil channel structures for oil pressure adjusting valve |
| CN107631065A (en) * | 2016-07-18 | 2018-01-26 | 鞍钢股份有限公司 | A kind of constant flow valve and its method of work |
| CN107725879A (en) * | 2017-10-19 | 2018-02-23 | 宁波文泽机电技术开发有限公司 | A kind of normally closed ratio one-way flow valves |
| CN107883028A (en) * | 2017-11-10 | 2018-04-06 | 宁波文泽机电技术开发有限公司 | The ratio one-way flow valves of double-direction control |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110559515A (en) * | 2019-09-09 | 2019-12-13 | 青岛大学附属医院 | drug delivery device for anesthetic |
| WO2021232505A1 (en) * | 2020-05-22 | 2021-11-25 | 杭州易超新能源汽车科技有限公司 | Novel combined valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108547812B (en) | 2019-12-03 |
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Effective date of registration: 20210203 Address after: No.2665, Linpu North Road, Oubei street, Yongjia County, Wenzhou City, Zhejiang Province 325105 Patentee after: OULAM VALVE TECHNOLOGY Co.,Ltd. Address before: Room 3, building 2, Zhongshan new street, Yangyi street, Lucheng District, Wenzhou City, Zhejiang Province 325000 Patentee before: Lin Chijie |
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