CN106050780B - A kind of flow type balanced valve - Google Patents
A kind of flow type balanced valve Download PDFInfo
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- CN106050780B CN106050780B CN201610574830.4A CN201610574830A CN106050780B CN 106050780 B CN106050780 B CN 106050780B CN 201610574830 A CN201610574830 A CN 201610574830A CN 106050780 B CN106050780 B CN 106050780B
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- hole
- fluid ports
- main valve
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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
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
Abstract
The invention discloses a kind of flow type balanced valve, including valve body, main valve plug, nonreturn valve core, guide valve set component, damping check valve, the first elastic component and the second elastic component, the guide valve set component and valve body are fixedly sleeved in opposite directions, the main valve plug and nonreturn valve core, which are axially towards one another, to be slidably arranged in the guide valve set component, the valve body is provided with X hydraulic fluid ports, the guide valve set component formation V hydraulic fluid ports and C hydraulic fluid ports, the C hydraulic fluid ports are connected with the fluid course set in the inner chamber of the nonreturn valve core and main valve plug；The guide valve set component is radially provided with multiple throttling through holes close to V hydraulic fluid ports；In V hydraulic fluid port oil-feeds, nonreturn valve core is opened, and V hydraulic fluid ports are connected with C hydraulic fluid ports；Promote main valve plug vertically to the movement of the first elastic component direction of compression in X hydraulic fluid port oil-feeds, the throttling through hole of guide valve set component exposes, and flow area is incrementally increased.Simpler, excessively stream is gentler for flow type balanced valve processing, can accurately control to load lowering velocity, using reliable.
Description
Technical field
Lowering velocity is loaded the present invention relates to control valve technical field, more particularly to a kind of control that can be precise and stable
Flow type balanced valve.
Background technology
In the plant equipment such as modern engineering machinery, building machinery, raising hydraulic circuit, wherein balanced valve have been widely applied
It is to control the crucial Hydraulic Elements that hydraulic jack works in hoisting circuit, the quality of balance valve performance directly affects the property of main frame
Energy.Existing such a shortcoming of hydraulically balanced valve generally existing：When loading decentralization, due to hydraulically balanced valve valve port flow-passing surface
The characteristics of product can produce mutation, can make load produce low-frequency jitter and the phenomenon of impact, cause system unstable, influence complete machine
Security reliability.
Patent announcement number is CN103470815B, the patent of invention of entitled " balanced valve " provides a kind of flow-passing surface gradually
The balanced valve of change, it is combined by milling out groove, aperture and inclined hole that multiple width differ on poppet valve core, reaches flow gradual change
Purpose.But this design has the following disadvantages：
(1) what is passed through when load decentralization and load rise is same valve port, can all produce restriction effect, and is loaded in practice
It is not need throttling action during rising, has a strong impact on the efficiency of operation；A check valve in parallel, nothing are also needed in order to solve this problem
Expense is added in shape；
(2) groove is milled out on poppet valve core and is got out after aperture and inclined hole, the rigidity of valve element is substantially reduced, under control load
Larger pressure difference and quick liquid flow impact are born when putting, be heat-treated in addition it is bad if, valve element is easy to break, and reliability is big
Big reduction；
(3) groove milling on poppet valve core, processed complex, efficiency are low, therefore cost of manufacture is high；
(4) although the flow area of valve element is gradual change, but in the case where pilot pressure is flown up, poppet valve core is same
Quick movement can be produced, flow is produced big mutation, shake is caused, therefore the movement of valve element lacks damping link.By
Control mouth sets damping hole, though can slow down valve element opening speed, can equally reduce speed when valve element is closed, cause load to stop
When distance of glide it is excessive.
The content of the invention
It is an object of the invention to the defect for overcoming prior art, there is provided a kind of flow type balanced valve, balanced valve processing
Simpler, excessively stream is gentler, can accurately control to load lowering velocity, and control is stable, using reliable.
For above technical problem, technical solution of the invention is to provide a kind of flow type with following structure
Balanced valve, the balanced valve includes：Valve body, main valve plug, nonreturn valve core, guide valve set component, damping check valve, the first elastic component and
Second elastic component, guide valve set component and valve body are fixedly sleeved in opposite directions, and main valve plug and nonreturn valve core are axially towards one another slip and set
Guide valve set component in, the first elastic component is located between valve body and main valve plug, the second elastic component be located at guide valve set component with
Between nonreturn valve core；Damping check valve, which slides axially, to be socketed on main valve plug back end cylindrical；Main valve plug and the guiding valve pocket
Component sequentially forms the first control chamber, the second control chamber connected with the X hydraulic fluid ports of valve body and the connected with the V hydraulic fluid ports of valve body the 3rd
Control chamber, the first control chamber is connected with the 3rd control chamber by the runner hole on main valve plug；Guide valve set component is formed with footpath
To V hydraulic fluid ports and axial direction C hydraulic fluid ports, V hydraulic fluid ports are located at the junction of main valve plug and nonreturn valve core, C hydraulic fluid ports and nonreturn valve core it is interior
The fluid course connection set in chamber and main valve plug；Guide valve covers component and is radially provided with multiple throttling through holes close to V hydraulic fluid ports.
In the non-oil-feed of V hydraulic fluid ports, main valve plug is with nonreturn valve core in the first elastic component and the opposite active force of the second elastic component
Lower closure is so as to separate V hydraulic fluid ports and C hydraulic fluid ports.In V hydraulic fluid port oil-feeds, nonreturn valve core is opened, and V hydraulic fluid ports are connected with C hydraulic fluid ports.In X hydraulic fluid ports
Promote main valve plug vertically to during the movement of the first elastic component direction of compression during oil-feed, the damping that main valve plug is damped check valve is made
With the throttling through hole of guide valve set component exposes, and flow area is incrementally increased.Herein, guide valve set component and valve body are solid in opposite directions
Fixed socket refers in guide valve set component at least partial insertion valve body and formed a fixed connection.Main valve plug and nonreturn valve core are along axle
It is arranged in guide valve set component and refers to slide in opposition, main valve plug and the axially opposed setting of nonreturn valve core, and pass through cunning
The dynamic mode coordinated is located at guide valve set component.Damping check valve is provided with the through hole being adapted with main valve plug back end cylindrical diameter,
And periphery is stepped, provided with the damping hole being connected with the through hole at ladder.The stepped cylindrical maximum of damping check valve
There is liquid fluid space in diameter, between position corresponding with guide valve set component when main valve plug is moved to nonreturn valve core direction, position
The fluid of chamber is connected through above-mentioned liquid fluid space with C hydraulic fluid ports where the first elastic component.
Further, guide valve set component mainly includes the first guide pin bushing, the second guide pin bushing and valve pocket, and nonreturn valve core is located at valve pocket
One end in, snapped connection in the middle part of the other end of valve pocket with valve body, the other end of valve pocket passes through calmly close to end and the second guide pin bushing
Position pin connection, is formed with recessed position between the second guide pin bushing and valve body, the first guide pin bushing be connected to recessed position and some to
Body cavity direction extends.It is understood that the first elastic component is located in the first chamber that valve body is formed with main valve plug, first
One end of guide pin bushing extends to valve inner or inner chamber (namely first chamber direction), therefore, and the first elastic component is to nonreturn valve core
The motion in direction is limited by the first guide pin bushing to valve extension position and the main valve plug distance that moves right.In addition, in the present invention
A scheme in, multiple throttling through holes are distributed in position between V hydraulic fluid ports and buckle.
Preferably, the second guide pin bushing includes shoulders and insertion section, and the front end of insertion section is provided with multiple first throttle through holes, inserted
The rear end for entering portion is provided with the first dowel hole, and valve pocket is provided with corresponds what is connected with multiple first throttle through holes of insertion section
Multiple second section openings and the second dowel hole corresponding with the first dowel hole.
In a preferred embodiment, the diameter of first throttle through hole respectively with corresponding second section circulate bore dia phase
Deng.Because first throttle through hole and second section opening are to correspond, therefore when not blocked, the section after the connection of formation
The area of passage of opening is exactly the area of corresponding first throttle through hole or second section opening.
In one embodiment, the first guide pin bushing is provided with the first oblique hole, the first oblique hole connection X hydraulic fluid ports and the second control
Chamber；Second guide pin bushing is provided with the second oblique hole, the second oblique hole connection V hydraulic fluid ports and the 3rd control chamber；Main valve plug is provided with the 3rd
Oblique hole and the 4th oblique hole, the 3rd oblique hole one end are communicated with the first control chamber, the other end and one end phase in the 4th oblique hole
Logical, the other end in the 4th oblique hole is communicated with the 3rd control chamber.
Further, nonreturn valve core is more than towards unidirectional towards internal diameter of the side of main valve plug provided with conical opening and conical opening
The main valve plug end face external diameter of valve element side, does not enter under oil condition, main valve plug abuts to list in the presence of the first elastic component in V hydraulic fluid ports
To valve element conical opening and form linear sealing and separate V hydraulic fluid ports and C hydraulic fluid ports.
Further, main valve plug includes back end cylindrical, first shoulder, the first recess, the second shoulder and preceding being sequentially connected
End, front end is formed with the second recess at the second shoulder, and the second control chamber is the second recess and the first guide pin bushing and the second guide pin bushing
Connection is formed；First recess connects first shoulder and the second shoulder, and the first recess is connected to form the first control with the first guide pin bushing
Chamber；There is the 3rd recess in the middle part of main valve plug leading portion, and the 3rd recess is connected to form the 3rd control chamber with the first valve pocket.
Preferably, main valve plug is provided with the loudspeaker type hole of axial direction, main valve plug towards one end of nonreturn valve core and is additionally provided with one
The first flow hole connected with loudspeaker type hole and the 5th oblique hole connected with the other end in first flow hole are held, the 5th is oblique
The other end in hole is located at first shoulder and the back end cylindrical junction of main valve plug.
In a preferred embodiment, the aperture internal diameter of loudspeaker type hole is equal with the diameter of back end cylindrical, outside front end
Footpath is equal with the diameter of first shoulder, and the diameter of the second shoulder is more than the diameter of first shoulder.
Beneficial effects of the present invention are as follows：
The flow type balanced valve of the present invention in a valve body by setting a nonreturn valve core and one to be used for what is throttled
Main valve plug, and by way of covering and throttling through hole is set on component in guide valve, the movement of control bound core just can be more accurate
Ground controls area of passage so that do not limited when hydraulic cylinder rises by throttling, when hydraulic cylinder declines by than shallower section
Flow control.Flow type balanced valve in the present invention is recessed due to that need not process many as balanced valve of the prior art
Groove, overall processing is simpler, and excessively stream is gentler, can accurately control to load lowering velocity, using more reliable.
In addition, being slidably socketed damping check valve on main valve plug, when control pressure, which is mutated, to be raised, main valve plug must be by after
Hold the hydraulic oil of cavity to be discharged through the damping hole on damping check valve, could further increase opening, damping hole has delayed main valve
The motion of core, can filter control pressure fluctuation, make main valve plug motion more steady；And during main valve plug closing, C mouthfuls of fluid is straight
Connect top and open damping check valve, enter the first elastic component chamber through big liquid fluid space, main valve plug realizes quick closedown, and load is sunk
Apart from small.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly introduced.It should be evident that drawings discussed below is only some embodiments of the present invention, for ability
For the those of ordinary skill in domain, on the premise of not paying creative work, it can also obtain other according to these accompanying drawings
Accompanying drawing.
Fig. 1 show the structural representation of the flow type balanced valve one of which embodiment of the present invention；
Fig. 2 show the principle schematic of the flow type balanced valve in Fig. 1；
Fig. 3 show the principle schematic of the hydraulic circuit using inventive flow type balanced valve；
Fig. 4 show a kind of structural representation of the valve pocket in Fig. 1；
Fig. 5 show a kind of structural representation of the second guide pin bushing in Fig. 1.
In figure：1st, valve body, the 2, first elastic component, 3, spring base, 4, damping check valve, the 5, first guide pin bushing, the 6, first control
Chamber, 7, main valve plug, 7.1, first shoulder, the 7.2, second shoulder, the 8, second control chamber, the 9, second guide pin bushing, 10, alignment pin, 11, card
Button, 12, valve pocket, 13, nonreturn valve core, the 14, second elastic component, 15, first flow hole, the 16, the 4th oblique hole, 17, second is oblique
Hole, the 18, first oblique hole, 19, X mouthfuls of runner holes, the 20, the 3rd oblique hole, 21, damping hole, the 22, the 3rd control chamber, the 23, first chamber
Room, the 24, the 5th oblique hole, 25, sprue hole, 26, second section opening, 27, block button hole, the 28, second dowel hole, 29,
One throttling through hole, the 30, first dowel hole.
Embodiment
In order that the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with accompanying drawing to the present invention
Exemplary embodiment be described in further detail.Obviously, described embodiment is only the part implementation of the present invention
Example, rather than all embodiments exhaustion.Based on the embodiment in the present invention, those of ordinary skill in the art are not making wound
The all other embodiment obtained under the premise of the property made work, falls within the scope of protection of the invention.
In one embodiment of the invention, as shown in figure 1, giving a kind of structural representation of flow type balanced valve.
In this embodiment, the flow type balanced valve mainly includes valve body 1, main valve plug 7, nonreturn valve core 13, guide valve set component, damping
Check valve 4, the first elastic component 2 and the second elastic component 14.Wherein, guide valve set component and valve body 1 are opposite fixedly sleeved.In other words
Say, it is at least part of in guide valve set component to be inserted into valve body 1 and be fixedly connected with valve body 1.Main valve plug 7 and nonreturn valve core
13 are axially towards one another setting, and main valve plug 7 and nonreturn valve core 13 are connected to by way of sliding and setting (or being slidably matched)
In guide valve set component.The first chamber 23 for accommodating the first elastic component 2 is formed between the left side of main valve plug 7 and valve body 1.Unidirectionally
Valve element 13 covers the second chamber that component is formed with the second elastic component 13 of installation with guide valve.In the case where not entering oil condition, the He of main valve plug 7
Nonreturn valve core 13 is mutually abutted in the first elastic component 2 with the opposite active force of the second elastic component 13.In addition, guide valve covers component
Provided with multiple throttling through holes, throttling through hole the moving left and right with main valve plug 7, flow area progressively changes, so that
Play a part of gently throttling.Damping check valve 4 is provided with the through hole being adapted with the back end cylindrical diameter of main valve plug 7, and periphery is
It is stepped, provided with the damping hole 21 being connected with the through hole at ladder.Main valve plug 7 is vertically to the first elastic component direction of compression
When mobile, the front end surface of damping check valve 4 is close on the first shoulder rear end face of main valve plug 7, the hydraulic pressure of the rear end cavity volume of main valve plug 7
Oil can only be on damping check valve damping hole 21 be discharged to C mouthfuls；When main valve plug 7 is moved round about vertically, C mouthfuls of hydraulic pressure
Damping check valve 4 is opened on oily directly top, is rapidly entered main valve plug rear end first chamber 23, is realized the quick closedown of main valve plug.
In one embodiment of the invention, guide valve set component mainly includes the first guide pin bushing 5, the second guide pin bushing 9 and valve pocket
12.Nonreturn valve core 13 is slidably socketed in valve pocket 12, and the second bullet has been abutted between nonreturn valve core 13 and one end inwall of valve pocket 12
Property part 14.The right-hand member external diameter of nonreturn valve core 13 is smaller than the shoulder external diameter of the nonreturn valve core 13 of connection, and the second elastic component 14 is socketed in
The right-hand member of nonreturn valve core 13 and one end are connected to the shoulder of nonreturn valve core 13, the other end and abut to the right-hand member of valve pocket 12 to be extended to inner chamber
Inwall on.Specifically, it can refer to Fig. 1.Nonreturn valve core 13, which is slidably fitted in valve pocket 12, to be referred to, outside the shoulder of nonreturn valve core 13
The surface of internal cavity of side face and valve pocket 12 is slidably matched, the inwall ring that the right-hand member outer peripheral face of nonreturn valve core 13 extends internally with valve pocket 12
Face forms and is slidably matched, so that nonreturn valve core 13 can slidably reciprocate along the inwall of valve pocket 12 under oil liquid pressure effect.
In one embodiment of the invention, guide valve set component is fixedly connected with valve body 1 refers to, in the left end of valve pocket 12
Portion is fixedly connected by buckle 11 with valve body 1, and the left end of valve pocket 12 is fixed close to end by the guide pin bushing 9 of alignment pin 10 and second to be connected
Connect, the first guide pin bushing 5 is fixed and is connected between the second guide pin bushing 9 and valve body 1.
As shown in figure 4, giving a kind of concrete structure of valve pocket 12.In the figure, the outer peripheral face of valve pocket 12 includes two
The individual bulge loop for being loaded, provided with the sprue hole 25 connected with V hydraulic fluid ports below bulge loop, the lower section in sprue hole 25 is set
There are radially arranged multiple second section openings 26.The lower section of second section opening 26, which is provided with, to be used to install the recessed of buckle 11
Bayonet socket hole 27 is provided with groove, groove, the lower section of block button hole 27 is provided with the second dowel hole 28 for installing alignment pin 10.
As shown in figure 5, giving a kind of concrete structure of the second guide pin bushing 9.In the figure, the second guide pin bushing 9 mainly includes platform
Shoulder and insertion section.The upper end of insertion section is provided with multiple first throttle through holes 29, and the lower end of insertion section is provided with installation alignment pin 10
The first dowel hole 30.
When mounted, the second dowel hole 28 of the first dowel hole 30 of the second guide pin bushing 9 and valve pocket 12 is corresponding and passes through
The connection positioning of alignment pin 10.Multiple first throttle through holes 29 of second guide pin bushing 9 and multiple second section openings 26 of valve pocket 12
Put and correspond multiple throttling through holes that connection is formed as guide valve set component respectively.As shown in figure 1, the second guide pin bushing 9 is multiple
Multiple second section openings 26 of first throttle through hole 29 and valve pocket 12 are manhole, therefore, when main valve plug 7 vertically to the left
When mobile, the through flow hole blocked by main valve plug 7 gradually exposes, and flow area becomes larger；When main valve plug 7 moves right vertically
When, throttling through hole is gradually blocked, and flow area is tapered into.
In one embodiment of the invention, be formed between the second guide pin bushing 9 and valve body 1 recessed position (or for annular
Gap), the right-hand member of the first guide pin bushing 5 is connected to by way of L-type structure is with clamping in the annular gap.A left side for first guide pin bushing 5
End is connected to by way of shoulder in valve body 1 and some extends to the interior cavity direction of valve body 1, so that valve body 1, the
One guide pin bushing 5, the second guide pin bushing 9 and valve pocket 12 are formed without the fixed part of relative displacement.First guide pin bushing 5 and the second guide pin bushing 9
Inner chamber is formed with the groove for the second shoulder 7.2 for accommodating main valve plug 7, because the second shoulder 7.2 is limited by the groove two ends,
Therefore main valve plug 7 is restricted with the distance moved right to the left.Especially, when nonreturn valve core 13 is moved right, main valve plug 7
Due to being limited by the second guide pin bushing 9 positioned at right side, it is impossible to synchronous to follow nonreturn valve core 13 to move right so that V hydraulic fluid ports
Gap inner chamber through nonreturn valve core 13 of the fluid between main valve plug 7 and nonreturn valve core 13 flows to C hydraulic fluid ports.
In one embodiment of the invention, as shown in figure 1, main valve plug 7 and nonreturn valve core 13 are axially towards one another setting.It is single
It is more than the main valve plug towards the side of nonreturn valve core 13 to valve element 13 towards internal diameter of the side of main valve plug 7 provided with conical opening and conical opening
7 end face external diameter.Do not enter under oil condition in V hydraulic fluid ports, main valve plug 7 abuts to nonreturn valve core 4 in the presence of the first elastic component 2
Conical opening simultaneously forms linear sealing, so as to separate V hydraulic fluid ports and C hydraulic fluid ports.
In one embodiment of the invention, main valve plug 7 is main by back end cylindrical (being the left side in Fig. 1), first shoulder
7.1st, the first recess, the second shoulder 7.2 and front end (being the right in Fig. 1) are sequentially connected composition.Wherein, the middle part of front end and second
The second recess is formed between shoulder 7.2, the second recess is connected the second control chamber 8 of formation with the first guide pin bushing 5 and the second guide pin bushing 9.
Back end cylindrical connect first shoulder 7.1, the first recess formation between the shoulder 7.2 of first shoulder 7.1 and second, the first recess with
The connection of first guide pin bushing 5 forms the first control chamber 6.It is easily understood that the first control chamber 6 and the second control chamber 8 are with main valve plug 7
Migration area can produce change, such as X hydraulic fluid ports oil-feed, when main valve plug 7 is moved to the left, the area of the second control chamber 8 increases therewith
Greatly.
In one embodiment of the invention, as shown in figure 1, the first guide pin bushing 5 is provided with the first oblique hole 18 through X mouthfuls of runners
Hole 19 connects X hydraulic fluid ports and the second control chamber 8；Second guide pin bushing 9 is provided with the second oblique hole 17, the second oblique connection of hole 17 V hydraulic fluid ports
With the 3rd control chamber；7 are provided with the 3rd oblique hole 16 in oblique hole 20 and the 4th, the 3rd oblique one end of hole 20 and the first control on main valve plug
Chamber processed is communicated, and the other end is communicated with the one end in the 4th oblique hole 16, the other end and the phase of the 3rd control chamber 22 in the 4th oblique hole 16
It is logical.Therefore, in X hydraulic fluid port oil-feeds, act on the second control chamber 8 active force overcome the resistance of the first elastic component 2 after can promote
Main valve plug 7 is moved to the left.
In one embodiment of the invention, the front end of main valve plug 7 is provided with loudspeaker type hole, and the loudspeaker type hole is entered in V hydraulic fluid ports
Oil promotes nonreturn valve core 13 to move right, when V hydraulic fluid ports are connected with C hydraulic fluid ports, can play a part of buffering oil liquid pressure.With trumpet type
Hole connection is the first flow hole 15 being located in main valve plug 7.Connect in addition, main valve plug 7 is located at first shoulder 7.1 with back end cylindrical
Place is met provided with the 5th oblique hole 24 connected with first flow hole 15.Therefore, nonreturn valve core 4 is promoted to move right in the oil-feed of V hydraulic fluid ports
When dynamic, the fluid of V hydraulic fluid ports can pass sequentially through loudspeaker type hole, the oblique hole 24 in first flow hole 15 and the 5th and enter a left side for main valve plug 7
Side, so that C hydraulic fluid ports act on the two ends of main valve plug 7 and active force can be formed and cancelled out each other.
In a preferred embodiment of the invention, in main valve plug 7, (i.e. porch is straight for the aperture internal diameter of loudspeaker type hole
Footpath) it is equal with the diameter of back end cylindrical.The outside diameter d 3 of the front end of main valve plug 7 is equal with the diameter d1 of first shoulder 7.1.Second
The diameter d2 of shoulder 7.2 is more than the diameter d1 of first shoulder 7.1.Therefore, C hydraulic fluid ports are acted on into the fluid in the left side of main valve plug 7
The active force on the right side that the active force of main valve plug 7 acts on main valve plug 7 with C hydraulic fluid ports is of substantially equal, can cancel each other out.Also
It is that the unlatching of main valve plug 7 is not substantially by the pressure influence of C hydraulic fluid ports.In addition, the fluid of the first control chamber 6 can be directly through V hydraulic fluid port streams
Go out.Therefore, the unlatching of main valve plug is not also influenceed by V hydraulic fluid port pressure, only with the control pressures of X hydraulic fluid ports and the first elastic component 2
Pretightning force is relevant.
As shown in Fig. 2 giving the principle schematic of the flow type balanced valve of the present invention.According to the figure, this present invention's
The operation principle of flow type balanced valve is：When V hydraulic fluid port oil-feeds, nonreturn valve core 13 is opened, and plays a part of quick oil feeding.Work as X
During hydraulic fluid port oil-feed, main valve plug 7 is opened, and with the movement of main valve plug 7, the throttling on opening section or whole guide valve set components
Through hole, so as to play a part of gently throttling.
As shown in figure 3, giving a kind of principle schematic of the hydraulic circuit of use inventive flow type balanced valve.At this
In figure, the A mouths of reversal valve connect the V hydraulic fluid ports of inventive flow type balanced valve, the C hydraulic fluid ports connection liquid of inventive flow type balanced valve
Cylinder pressure rodless cavity, the oil liquid pressure of the X hydraulic fluid ports of inventive flow type balanced valve is by operation handle control.The hydraulic circuit is in work
When, including rising, stop and decline these three processes, specific work process is as follows：
(1) uphill process.The pressure oil of reversal valve reaches the V hydraulic fluid ports of flow type balanced valve, and the pressure oil of V hydraulic fluid ports overcomes the
The pretightning forces of two elastic components 14 promotes nonreturn valve core 13 to move right unlatchings, and pressure oil flows into C hydraulic fluid ports arrival hydraulic cylinder through V hydraulic fluid ports
Rodless cavity, promotes hydraulic cylinder up.This stage fluid flows into C mouthfuls by V mouthfuls without throttling action.
(2) process is declined.The pressure oil of X hydraulic fluid ports is applied on main valve plug 7 into the second control chamber 8, overcomes the first elasticity
The pretightning force of part 2, moves to left main valve plug 7.The right-hand member that nonreturn valve core 13 is against the second guide pin bushing 9 has separated V hydraulic fluid ports and C hydraulic fluid ports.Work as X
During hydraulic fluid port pressure increase, main valve plug 7 is further moved to left, the second guide pin bushing 9 covered in before progressively exposing by the diameter of main valve plug 7 with
The throttling through hole that each is communicated on valve pocket 12 so that area of passage relaxes increase, and load lowering velocity can be with precisely controlled.
And because many grooves need not be opened as prior art on main valve plug 7, reduce many processing technologys, processing cost drop
It is low, and the rigidity of main valve plug 7 will not be had any impact.
(3) stopped process.X hydraulic fluid ports pressure is reduced, and the first elastic component 2 promotes main valve plug 7 to move to right, and area of passage gradually contracts
It is small, until the valve port of main valve plug 7 is shut.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the scope of the invention.As long as it will additionally be appreciated that in the absence of in structure
Conflict, the feature in each embodiment can be combined with each other, and the combined type feature formed still falls within the scope of the present invention
It is interior.The invention is not limited in specific embodiment disclosed herein, but all skills including falling within the scope of the appended claims
Art scheme.
Claims (10)
1. a kind of flow type balanced valve, it is characterised in that including valve body, main valve plug, nonreturn valve core, guide valve set component, damping
Check valve, the first elastic component and the second elastic component, guide valve set component and valve body are fixedly sleeved in opposite directions, the main valve plug with
Nonreturn valve core, which is axially towards one another, to be slidably arranged in the guide valve set component, and first elastic component is located at valve body and main valve plug
Between, second elastic component is located between guide valve set component and nonreturn valve core；The damping check valve slides axially set
It is connected on main valve plug back end cylindrical；The main valve plug covers component with the guide valve and sequentially forms the first control chamber, the X with valve body
Second control chamber of hydraulic fluid port connection and the 3rd control chamber connected with the V hydraulic fluid ports of valve body；First control chamber and the 3rd control
Chamber is connected by the runner hole on main valve plug；The guide valve set component is formed with the V hydraulic fluid ports of radial direction and the C hydraulic fluid ports of axial direction,
The V hydraulic fluid ports are located at the junction of main valve plug and nonreturn valve core, inner chamber and main valve plug of the C hydraulic fluid ports with the nonreturn valve core
The fluid course connection of interior setting；The guide valve set component is radially provided with multiple throttling through holes close to V hydraulic fluid ports；In V hydraulic fluid ports
Nonreturn valve core is opened during oil-feed, and V hydraulic fluid ports are connected with C hydraulic fluid ports；Main valve plug is promoted in X hydraulic fluid port oil-feeds vertically to compressing the first bullet
Property the movement of part direction when, the throttling through hole of guide valve set component progressively exposes, the fluid warp of chamber where first elastic component
Damping hole on the damping check valve flows to C hydraulic fluid ports.
2. a kind of flow type balanced valve as claimed in claim 1, it is characterised in that the damping check valve is provided with and main valve plug
Through hole that back end cylindrical diameter is adapted and stepped cylindrical, the cylindrical ladder junction is provided with what is be connected with the through hole
Exist between damping hole, the stepped cylindrical maximum gauge position corresponding with guide valve set component of the damping check valve
Liquid fluid space, when the main valve plug is moved to the nonreturn valve core direction, positioned at the oil of chamber where first elastic component
Liquid is connected through the liquid fluid space with C hydraulic fluid ports.
3. a kind of flow type balanced valve as claimed in claim 1, it is characterised in that the guide valve set component is led including first
Set, the second guide pin bushing and valve pocket, the nonreturn valve core are located in one end of the valve pocket, the other end middle part of the valve pocket and valve body
Snap connection, the other end of the valve pocket close to end and the second guide pin bushing by positioning pin connection, second guide pin bushing with it is described
Be formed with recessed position between valve body, first guide pin bushing be connected to the recessed position and some to the body cavity
Direction extends.
4. a kind of flow type balanced valve as claimed in claim 3, it is characterised in that second guide pin bushing includes shoulders and inserted
Enter portion, the front end of the insertion section is radially provided with multiple first throttle through holes, and the rear end of the insertion section is provided with the first positioning
Multiple second throttlings for corresponding and connecting with multiple first throttle through holes of insertion section are radially provided with pin-and-hole, the valve pocket
Through hole and the second dowel hole corresponding with the first dowel hole.
5. a kind of flow type balanced valve as claimed in claim 4, it is characterised in that the multiple first throttle through hole uniformly divides
Cloth is on the periphery of the insertion section front end of second guide pin bushing so that when the direction of main valve plug to the first elastic component of compression is moved
First throttle through hole and corresponding second section opening are incrementally increased with the area of passage that C hydraulic fluid ports are connected.
6. a kind of flow type balanced valve as claimed in claim 5, it is characterised in that first guide pin bushing is oblique provided with first
Hole, the first oblique hole connection X hydraulic fluid ports and the second control chamber；Second guide pin bushing is provided with the second oblique hole, described second
Oblique hole connection V hydraulic fluid ports and the 3rd control chamber；The main valve plug is provided with the 3rd oblique hole and the 4th oblique hole, and the described 3rd is oblique
Communicated to hole one end with the first control chamber, the other end is communicated with the one end in the 4th oblique hole, the 4th oblique hole it is another
One end is communicated with the 3rd control chamber.
7. a kind of flow type balanced valve as claimed in claim 1, it is characterised in that the nonreturn valve core towards main valve plug one
Internal diameter of the side provided with conical opening and the conical opening is more than the main valve plug end face external diameter towards nonreturn valve core side, does not enter in V hydraulic fluid ports
Under oil condition, the main valve plug abuts to the conical opening of the nonreturn valve core in the presence of the first elastic component and forms linear close
Seal and separate V hydraulic fluid ports and C hydraulic fluid ports.
8. a kind of flow type balanced valve as claimed in claim 1, it is characterised in that the main valve plug is included after being sequentially connected
Cylinder, first shoulder, the first recess, the second shoulder and front end are held, front end is formed with the second recess at the second shoulder, described
Second control chamber is that second recess is connected and formed with the first guide pin bushing and the second guide pin bushing；First recess connects first shoulder
With the second shoulder, and first recess is connected to form the first control chamber with the first guide pin bushing；Have the in the middle part of the main valve plug leading portion
Three recesses, and the 3rd recess is connected to form the 3rd control chamber with the first valve pocket.
9. a kind of flow type balanced valve as claimed in claim 8, it is characterised in that the main valve plug is towards the nonreturn valve core
Loudspeaker type hole of the one end provided with axial direction, be additionally provided with the main valve plug first flow hole that one end connects with loudspeaker type hole with
And the 5th oblique hole connected with the other end in first flow hole, the other end in the 5th oblique hole is positioned at the main valve plug
First shoulder and back end cylindrical junction.
10. a kind of flow type balanced valve as claimed in claim 9, it is characterised in that the aperture internal diameter of the loudspeaker type hole with
The diameter of back end cylindrical is equal, and the diameter of the main valve plug front end is equal to the diameter of first shoulder, the diameter of second shoulder
More than the diameter of first shoulder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610574830.4A CN106050780B (en) | 2016-07-19 | 2016-07-19 | A kind of flow type balanced valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610574830.4A CN106050780B (en) | 2016-07-19 | 2016-07-19 | A kind of flow type balanced valve |
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| CN106050780A CN106050780A (en) | 2016-10-26 |
| CN106050780B true CN106050780B (en) | 2017-10-31 |
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| CN201610574830.4A Active CN106050780B (en) | 2016-07-19 | 2016-07-19 | A kind of flow type balanced valve |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757615B (en) * | 2018-06-28 | 2020-07-07 | 徐工集团工程机械有限公司 | Balance valve, hydraulic system and engineering machinery |
| CN108953713B (en) * | 2018-08-22 | 2021-09-28 | 宁波威森搏乐机械制造有限公司 | Flow type balance valve |
| CN108953267B (en) * | 2018-08-22 | 2020-08-14 | 上海昂极仪表科技有限公司 | Flow type balance valve |
| CN108775431A (en) * | 2018-08-22 | 2018-11-09 | 东莞海特帕沃液压科技有限公司 | Balanced valve |
| CN108661971B (en) * | 2018-08-22 | 2020-04-17 | 玉环信得利阀业股份有限公司 | Load sensing type flow control balance valve |
| CN108999824B (en) * | 2018-09-21 | 2020-04-17 | 玉环信得利阀业股份有限公司 | Energy-saving balance valve |
| CN108825577B (en) * | 2018-09-21 | 2020-02-11 | 上海辛金路流体技术有限公司 | Balance valve with variable hydraulic control ratio |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4418612A (en) * | 1981-05-28 | 1983-12-06 | Vickers, Incorporated | Power transmission |
| CN1133821C (en) * | 2001-12-27 | 2004-01-07 | 卢永松 | Balancing valve |
| CN202971371U (en) * | 2012-12-04 | 2013-06-05 | 怀特(中国)驱动产品有限公司 | Directly-operated type hydraulic screw-in balance valve |
| CN203051274U (en) * | 2012-12-13 | 2013-07-10 | 陈磊 | Balance valve |
| CN103470815B (en) * | 2013-09-30 | 2015-08-26 | 常德中联重科液压有限公司 | Equilibrium valve |
| CN103498824B (en) * | 2013-10-14 | 2015-11-25 | 徐州重型机械有限公司 | A kind of balancing valve apparatus |
| CN203641148U (en) * | 2013-12-26 | 2014-06-11 | 中联重科股份有限公司 | Balance valve and hydraulic cylinder telescopic control loop |
| CN204164067U (en) * | 2014-08-15 | 2015-02-18 | 徐工集团工程机械股份有限公司 | A kind of equilibrium valve |
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Effective date of registration: 20191028 Address after: 314500 north side of Changshan River and west side of Shangfeng port, zhouquan Town, Tongxiang City, Jiaxing City, Zhejiang Province Patentee after: Tongxiang Fuchang Chemical Fiber Co., Ltd Address before: Taiwanese Investment Zone in Fujian province Quanzhou City Dongyuan town 362000 group of green Cunxun head 25 Patentee before: Huang Peiquan |