CN108953705A - Pilot balance valve - Google Patents
Pilot balance valve Download PDFInfo
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- CN108953705A CN108953705A CN201810952010.3A CN201810952010A CN108953705A CN 108953705 A CN108953705 A CN 108953705A CN 201810952010 A CN201810952010 A CN 201810952010A CN 108953705 A CN108953705 A CN 108953705A
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The present invention proposes a kind of pilot balance valve, comprising: valve body, valve pocket, partition, outer pilot valve, interior pilot valve, the first spring base, valve casing, balance valve core, the first spring, second spring, third spring, second spring seat, nonreturn valve core, the 4th spring.Pilot balance valve according to an embodiment of the present invention can reduce pilot pressure without influencing stability, energy conservation.
Description
Technical field
The present invention relates to a kind of valve modules of hydraulic device, relate in particular to a kind of pilot balance valve.
Background technique
In the mechanical equipments such as modern engineering machinery, building machinery, raising hydraulic circuit is widely applied, wherein balanced valve
It is the key that hydraulic cylinder work Hydraulic Elements, the superiority and inferiority for balancing valve performance directly affect the property of host in control hoisting circuit
Energy.Since balanced valve mainly increases back pressure, and set pressure is usually bigger than maximum load by 30%~50%, thus balanced valve
It is to belong to dissipative cell in systems, leads to overpowering consumption to obtain stabilization.Currently available technology is fixed setting pressure,
Generally 1.3~1.5 times of maximum loads, when load become smaller or it is unloaded when similarly need the so big back pressure of full load, because
And pilot pressure must be increased, to open the pressure of setting, this will cause unnecessary idle work to export, and cause energy dissipation.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, an object of the present invention is to provide can reduce pilot pressure without influencing stability, energy-efficient
Pilot balance valve.
A kind of pilot balance valve according to an embodiment of the present invention, comprising:
Valve body, the valve body have the valve body blind hole of opening to the right, and the valve body blind hole includes the first valve body from left to right
Blind hole section and the second valve body blind hole section, the aperture of the first valve body blind hole section are less than the aperture of the second valve body blind hole section；
Valve pocket, the valve pocket are located in the second valve body blind hole section, and the valve pocket includes periphery wall and second valve
The valve pocket main paragraph that the internal perisporium of body blind hole is in contact and the valve pocket undergauge section positioned at the valve pocket main paragraph right side, the valve
The left side of main paragraph is covered against the right side of the first valve pocket blind hole section, and the valve pocket has the valve pocket of left and right perforation logical
Hole, the valve pocket through-hole include the first valve pocket through hole section, the second valve pocket through hole section and third valve pocket through hole section from left to right, described
It is small that the aperture of first valve pocket through hole section is greater than the aperture of the second valve pocket through hole section and the aperture of the first valve pocket through hole section
In the aperture of the first valve body blind hole section, the aperture of the second valve pocket through hole section is greater than the hole of the third valve pocket through hole section
Diameter；
Partition, the partition are located at the right side in the second valve body blind hole section and being located at the valve pocket, the partition
There is the radial direction along the valve pocket to penetrate through the valve pocket on the right side of the valve pocket, the right side of the valve pocket for left side
Side wall the first through-flow slot；
Outer pilot valve, the outer pilot valve include can slidingly be located at it is outer in the first valve pocket through hole section
Pilot valve main paragraph and the outer pilot valve undergauge section that can be slidingly located in the second valve pocket through hole section, it is described
Outer pilot valve has the outer pilot valve through-hole of left and right perforation, and the outer pilot valve through-hole includes being located at the outer pilot valve
The first outer pilot valve through hole section on core main paragraph, the second outer pilot valve in the outer pilot valve undergauge section are logical
Hole section and pilot valve in the outer pilot valve undergauge section and outside the third of the right side of the neighbouring outer pilot valve
The outer pilot valve main paragraph is protruded into core through hole section, the left end of the second outer pilot valve through hole section to the left, and described first
Outer pilot valve through hole section aperture is greater than the aperture of the described second outer pilot valve through hole section, the second outer pilot valve through-hole
The aperture of section is greater than the outer pilot valve through hole section of the third；
Interior pilot valve, the interior pilot valve include can slidingly be located at it is interior in the third valve pocket through hole section
Pilot valve main paragraph and left end are adapted with the outer pilot valve through hole section of the third and are protruded into outside described second to the left first
The interior pilot valve undergauge section of guide valve core through hole section；
First spring base, first spring base include being located at the described second outer pilot valve through hole section interior and outer diameter and institute
It states the identical linkage section of outer diameter of interior pilot valve undergauge section and is located at expanding in the described first outer pilot valve through hole section
Section；
Valve casing, the left end of the valve casing are fixedly plugged in the right side in the second valve body blind hole section and being located at the partition
Face, against the right side of the partition, the valve casing has the valve casing through-hole of left and right perforation, the valve for the left side of the valve casing
Shell through-hole includes the first valve casing through hole section, the second valve casing through hole section, the third valve casing through hole section that aperture is changed from small to big from left to right
With the 4th valve casing through hole section, the aperture of the first valve casing through hole section is greater than the aperture of the third valve pocket through hole section and is less than institute
The outer diameter of valve pocket undergauge section is stated, has on the side wall of the valve casing and is connected to the second valve casing through hole section and the neighbouring third valve
First hydraulic fluid port of shell through hole section；
Balance valve core, the balance valve core include can slidingly be located in the second valve opening through hole section it is first flat
Weighing apparatus spool section can be located at positioned at the first balance valve core section left side and slidingly in the first valve casing through hole section second flat
The third balance valve core that weighing apparatus spool section and left end pass through the partition to the left and be connected with the interior pilot valve main paragraph
Section, the outer diameter of the third balance valve core section are less than the outer diameter of the interior pilot valve main paragraph；
First spring, first spring are located in the first valve body blind hole section, the left end of first spring against
The right end of the bottom surface of the valve body blind hole and first spring is against the left side of first spring base；
Second spring, the second spring are located in the first valve body blind hole section and are socketed on first spring,
The left end of the second spring is against the bottom surface of the valve body blind hole and the right end of the second spring is against the valve pocket
Left side, the internal diameter of the second spring is less than the first valve pocket through hole section aperture and the outer diameter of the second spring is greater than
The first valve pocket through hole section aperture, the second spring often push to the right first spring base, so that first spring
Seat often pushes to the right the interior pilot valve, to make the right side of the interior pilot valve often against the left side of the partition
And the balance valve core is often pushed to the right, so that the right end of the balance valve core in left part closes first hydraulic fluid port；
Third spring, the third spring are located at the described second outer pilot valve through hole section and are socketed in the interior pilot valve
On the linkage section of core undergauge section and first spring base, the left end of the third spring is against the expanding of first spring base
The right side of section and the right end of the third spring pilot valve through hole section outside the third do step surface, the third
Spring often pushes the outer pilot valve to the right so that the right side of the outer pilot valve is often against the third valve pocket through-hole
The left step surface of section, at this point, in valve pocket described in the left side retraction to the right of the outer pilot valve and the outer pilot valve
The first preset distance of left end face interval of left side and the valve pocket, the right side of the outer pilot valve main paragraph and described the
Left the second preset distance of step face interval of two valve pocket through hole sections；
Second spring seat, the second spring seat fixation are located in the 4th valve casing through hole section；
Nonreturn valve core, the nonreturn valve core include can slidingly cooperate it is unidirectional in the third valve casing through hole section
Spool main paragraph and it can cooperate positioned at the nonreturn valve core main paragraph right side and slidingly in the second spring seat
Nonreturn valve core undergauge section, there is on the nonreturn valve core nonreturn valve core through-hole of left and right perforation, the nonreturn valve core through-hole
Aperture is less than the aperture of the second valve casing through hole section, and the right end of the nonreturn valve core through-hole constitutes the second hydraulic fluid port；
4th spring, the 4th spring are socketed in the nonreturn valve core undergauge section, and the left end of the 4th spring is supported
By the right side of the nonreturn valve core main paragraph and the right end of the 4th spring is against the second spring seat, the 4th bullet
Spring often push the nonreturn valve core to the left so that the nonreturn valve core left side against the right side of the balance valve core to
First hydraulic fluid port is closed, at this point, the right step of the left side of the nonreturn valve core main paragraph and the second valve casing through hole section
Face interval third preset distance, the third preset distance are equal to first preset distance；
Wherein, in the first valve body blind hole section, the left side of the valve pocket, the outer pilot valve left side with
And the left side of first spring base limits the first control chamber, has on the side wall of the valve body and is connected to first control
The third hydraulic fluid port of chamber, in the second valve body blind hole section, the periphery wall of the valve pocket undergauge section and the left end of the partition
Face limits the second control chamber, has the 4th hydraulic fluid port for being connected to second control chamber, the outer elder generation on the side wall of the valve body
Third control chamber, the valve are limited between the right side of guide valve core main paragraph and the left step surface of the second valve pocket through hole section
There is the second through-flow slot for being connected to second control chamber and the third control chamber, in the outer pilot valve on the side wall of set
In through-hole, the periphery wall of the periphery wall of the interior pilot valve and first spring base limits the 4th control chamber, described
There is the first through flow hole for being connected to first control chamber and the 4th control chamber, described on the extension diameter section of first spring base
In first valve casing through hole section, the 5th control is defined between the right side of the partition and the left side of the second balance valve core section
Chamber processed has the runner for being connected to the 5th control chamber and the balance valve core right side on the balance valve core, described the
In two valve casing through hole sections, the outer peripheral surface of the second balance valve core section limits the 6th control chamber, has on the side wall of the valve casing
There is the second through flow hole of the 6th control of connection.
Advantageously, the pilot balance valve further includes third spring base, and the third spring base is located at described first
It valve body blind hole section and is supported against the bottom surface of the valve body blind hole, the left end of first spring and the left end of the second spring
By the right side of the third spring base.
Advantageously, there is interior positioning compatible with the left end of first spring on the right side of the third spring base
The left end of annular groove and outer positioning ring slot compatible with the left end of the second spring, first spring cooperates described interior
In positioning ring groove, the left end of the second spring cooperates in second positioning ring groove.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of pilot balance valve according to an embodiment of the invention；
Fig. 2 is the hydraulic schematic diagram of pilot balance valve according to an embodiment of the invention；
Fig. 3 is a kind of hydraulic schematic diagram of application scenarios of pilot balance valve according to an embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings it is described in detail pilot balance valve according to an embodiment of the present invention.
As shown in Figure 1 to Figure 3, pilot balance valve according to an embodiment of the present invention, comprising: valve body 1, valve pocket 2, partition 3,
Outer pilot valve 4, interior pilot valve 5, the first spring base 6, valve casing 7, balance valve core 8, the first spring 9a, second spring 9b, the
Three spring 9c, second spring seat 10, nonreturn valve core 11, the 4th spring 9d.
Valve body 1 has an opening valve body blind hole to the right, the valve body blind hole include from left to right the first valve body blind hole section and
Second valve body blind hole section, the aperture of the first valve body blind hole section are less than the aperture of the second valve body blind hole section.
Valve pocket 2 is located in the second valve body blind hole section, and valve pocket 2 includes the inner circumferential of periphery wall and the second valve body blind hole
The valve pocket main paragraph that wall is in contact and the valve pocket undergauge section positioned at the valve pocket main paragraph right side.A left side for the valve pocket main paragraph
End face is against the right side of the first valve pocket blind hole section.Valve pocket 2 has the valve pocket through-hole of left and right perforation, and the valve pocket through-hole is certainly
From left to right includes the first valve pocket through hole section, the second valve pocket through hole section and third valve pocket through hole section.The first valve pocket through hole section
It is blind less than first valve body that aperture is greater than the aperture of the second valve pocket through hole section and the aperture of the first valve pocket through hole section
The aperture of hole section, the aperture of the second valve pocket through hole section are greater than the aperture of the third valve pocket through hole section.
Partition 3 is located at the right side in the second valve body blind hole section and being located at valve pocket 2, and the left side of partition 3 is against valve pocket 2
Right side, there is on the right side of valve pocket 2 first through-flow slot 2a of the side wall of the radial perforation valve pocket 2 along valve pocket 2.
Outer pilot valve 4 includes the outer pilot valve main paragraph that can be slidingly located in the first valve pocket through hole section
And it can be slidingly located at the outer pilot valve undergauge section in the second valve pocket through hole section, outer pilot valve 4 has a left side
The outer pilot valve through-hole of right perforation, the outer pilot valve through-hole include first on the outer pilot valve main paragraph
Outer pilot valve through hole section, the second outer pilot valve through hole section in the outer pilot valve undergauge section and be located at institute
It states in outer pilot valve undergauge section and the outer pilot valve through hole section of the third of the right side of the neighbouring outer pilot valve, described the
The outer pilot valve main paragraph, the first outer pilot valve through hole section are protruded into the left end of two outer pilot valve through hole sections to the left
Aperture is greater than the aperture of the described second outer pilot valve through hole section, and the aperture of the second outer pilot valve through hole section is greater than described
The outer pilot valve through hole section of third.
Interior pilot valve 5 includes the interior pilot valve main body that can be slidingly located in the third valve pocket through hole section
Section and left end are adapted with the outer pilot valve through hole section of the third and protrude into the described second outer pilot valve through hole section to the left
Interior pilot valve undergauge section.
First spring base 6 includes being located in the described second outer pilot valve through hole section and outer diameter and the interior pilot valve contracting
The identical linkage section of the outer diameter of diameter section and the extension diameter section being located in the described first outer pilot valve through hole section.
The left end of valve casing 7 is fixedly plugged in the right side in the second valve body blind hole section and being located at partition 3, a left side for valve casing 7
End face has the valve casing through-hole of left and right perforation against the right side of partition 3, valve casing 7, and the valve casing through-hole includes hole from left to right
The first valve casing through hole section, the second valve casing through hole section, third valve casing through hole section and the 4th valve casing through hole section that diameter changes from small to big, it is described
The aperture of first valve casing through hole section is greater than the aperture of the third valve pocket through hole section and is less than the outer diameter of the valve pocket undergauge section, valve
There is the first hydraulic fluid port V for being connected to the second valve casing through hole section and the neighbouring third valve casing through hole section on the side wall of shell 7.
Balance valve core 8 includes the first balance valve core section that can be slidingly located in the second valve opening through hole section, position
In the first balance valve core section left side and can slidingly be located in the first valve casing through hole section the second balance valve core section, with
And the third balance valve core section that left end passes through partition 3 to the left and is connected with the interior pilot valve main paragraph, the third balance
The outer diameter of spool section is less than the outer diameter of the interior pilot valve main paragraph.
First spring 9a is located in the first valve body blind hole section, and the left end of the first spring 9a is against the valve body blind hole
The right end of bottom surface and the first spring 9a are against the left side of the first spring base 6.
Second spring 9b is located in the first valve body blind hole section and is socketed on the first spring 9a, a left side of second spring 9b
It holds against the bottom surface of the valve body blind hole and the right end of second spring 9b is against the left side of the valve pocket 2, second spring 9b's
Internal diameter is less than the first valve pocket through hole section aperture and the outer diameter of second spring 9b is greater than the first valve pocket through hole section aperture, the
Two spring 9b often push to the right the first spring base 6, so that the first spring base 6 often pushes to the right interior pilot valve 5, to make interior elder generation
The right side of guide valve core 5 often often pushes against the left side of partition 3 and to the right balance valve core 8, so that the right end of balance valve core 8 exists
The first hydraulic fluid port of closing V of left part.
Third spring 9c be located at the described second outer pilot valve through hole section and be socketed in the interior pilot valve undergauge section and
On the linkage section of first spring base 6, the right side and third bullet of the left end of third spring 9c against the extension diameter section of the first spring base 6
The right end of spring 9c pilot valve through hole section outside the third does step surface, and third spring 9c often pushes to the right outer pilot valve
Core 4 so that the right side of outer pilot valve 4 often against the left step surface of the third valve pocket through hole section.At this point, outer pilot valve 4
Left side to the right in retraction valve pocket 2 and the first preset distance of left end face interval of the left side of outer pilot valve 4 and valve pocket 2,
The right side of the outer pilot valve main paragraph and left the second preset distance of step face interval of the second valve pocket through hole section.
The fixation of second spring seat 10 is located in the 4th valve casing through hole section.
Nonreturn valve core 11 includes that can slidingly cooperate the nonreturn valve core main paragraph in the third valve casing through hole section
And the nonreturn valve core in the second spring seat can be cooperated positioned at the nonreturn valve core main paragraph right side and slidingly
Undergauge section, has the nonreturn valve core through-hole 111 of left and right perforation on nonreturn valve core 11, and the aperture of nonreturn valve core through-hole 111 is less than institute
The aperture of the second valve casing through hole section is stated, the right end of nonreturn valve core through-hole 111 constitutes the second hydraulic fluid port C.
4th spring 9d is socketed in the nonreturn valve core undergauge section, and the left end of the 4th spring 9d is against the nonreturn valve core
The right end of the right side of main paragraph and the 4th spring 9d often push nonreturn valve core against second spring seat 10, the 4th spring 9d to the left
11 so that the first hydraulic fluid port V is closed against the right side of balance valve core 8 in the left side of nonreturn valve core 11.At this point, described unidirectional
The right step face interval third preset distance of the left side of spool main paragraph and the second valve casing through hole section, the third are predetermined
Distance is equal to first preset distance.
Wherein, in the first valve body blind hole section, the left side of valve pocket 2, the left side of outer pilot valve 4 and first
The left side of spring base 6 limits the first control chamber 1a, has the third hydraulic fluid port of the first control chamber 1a of connection on the side wall of valve body 1
T.In the second valve body blind hole section, the periphery wall of the valve pocket undergauge section and the left side of partition 3 limit the second control
Chamber 1b processed has the 4th hydraulic fluid port X of the second control chamber 1b of connection on the side wall of valve body 1.The right side of the outer pilot valve main paragraph
Third control chamber 1c is limited between end face and the left step surface of the second valve pocket through hole section, is had on the side wall of valve pocket 2 and is connected
The second through-flow slot 2b of logical second control chamber 1b and third control chamber 1c.In the outer pilot valve through-hole, interior pilot valve 5
Periphery wall and the periphery wall of the first spring base 6 limit the 4th control chamber 1d, have on the extension diameter section of the first spring base 6 and connect
The first through flow hole 601 of logical first control chamber 1a and the 4th control chamber 1d.In the first valve casing through hole section, the right side of partition 3
It defines the 5th control chamber 7a between end face and the left side of the second balance valve core section, there is connection the on balance valve core 8
The runner 801 of five control chamber 7a and 7 right side of balance valve core.In the second valve casing through hole section, second balance valve core
The outer peripheral surface of section limits the 6th control chamber 7b, has the second through flow hole of the 6th control chamber 7b of connection on the side wall of valve casing 7
701。
An example according to the present invention, the pilot balance valve further include third spring base 12, third spring base
12 are located at the first valve body blind hole section and against the bottom surface of the valve body blind hole, the left end of the first spring 9a and second spring 9b
Left end against the right side of third spring base 12.Advantageously, have and the first spring on the right side of third spring base 12
The compatible interior positioning ring groove (not shown) in the left end of 9a and outer positioning ring slot compatible with the left end of second spring 9b are (not
Show), the left end of the first spring 9a cooperates in the interior positioning ring groove, and the left end cooperation of second spring 9b is fixed described second
In the annular groove of position.
It following is a brief introduction of the course of work of pilot balance valve according to an embodiment of the present invention.
As shown in figure 3, the first hydraulic fluid port V and the second through flow hole 701 are connected with the actuator port A of reversal valve 16, by second
Hydraulic fluid port C is connected with the rodless cavity of hydraulic cylinder 15, by the actuator port of the rod chamber of the 4th hydraulic fluid port X and hydraulic cylinder 15 and reversal valve 16
B is connected, and third hydraulic fluid port T is connected with fuel tank.
(1) uphill process, the pressure oil that the pressure oil of reversal valve 16 reaches the first hydraulic fluid port V, the first hydraulic fluid port V of balanced valve are logical
Pushing nonreturn valve core 11 to move right overcomes the active force of one-way valve spring 14d to open valve port, and oil flows into second through the first hydraulic fluid port V
Hydraulic fluid port C reaches 15 rodless cavity of hydraulic cylinder, pushes 15 uplink of hydraulic cylinder.At this point, partial pressure oil enters the 5th control chamber 7a and the
Six control chamber 7b, it is ensured that balance valve core 8 is not moved to the left.
(2) during declining, reversal valve 16 commutates, and the pressure oil of the 4th hydraulic fluid port X acts on interior pilot valve 5 and outer guide
On spool 4, it is divided into three phases control balance valve core 8 and moves upwards, open the valve port between the first hydraulic fluid port V and the second hydraulic fluid port C,
It is supported in control and declines.
Specifically, pilot balance valve according to an embodiment of the present invention, is equipped with interior pilot valve 5 and outer pilot valve 4,
And it is equipped with the first spring 9a, second spring 9b and third spring 9c.When needing to control load decline, that is, oil liquid is by the second oil
When mouth C flows into the first hydraulic fluid port V, the movement of balance valve core 8, interior pilot valve 5 and outer pilot valve 4 is divided into three phases progress
, it is specific as follows:
First stage: the 4th hydraulic fluid port X oil inlet, if the 4th hydraulic fluid port X pressure is lower, oil liquid is led to by the 4th hydraulic fluid port X through first
It is applied to after chute 2a in interior pilot valve 5, pushes interior pilot valve 5 that the active force of the first spring 9a is overcome to move downward, it is interior
Pilot valve 5 moves downward can drive balance valve core 8 to move downward and push outer pilot valve 4 to move downward simultaneously, until outer
Pilot valve 4 starts to contact second spring 9b, the left side of the nonreturn valve core main paragraph and the second valve casing through hole section
Right step surface offsets, and balance valve core 8 is made to be in the critical point opened.In the first stage in motion process, the pressure of the 4th hydraulic fluid port X
It acts in interior pilot valve 5, it is only necessary to overcome the active force of the first spring 9a.It is such to be advantageous in that for balance valve core 8
For, the critical point of unlatching is moved to from closed state, does not need to waste biggish pressure compared with the existing technology, it in this way can be with
Just reach unlatching critical point under lesser 4th hydraulic fluid port X pressure.
Second stage: increasing the pressure value of the 4th hydraulic fluid port X, and the pressure of the 4th hydraulic fluid port X is acted in interior pilot valve 5 and pushed
Outer pilot valve 4 and balance valve core 8 is driven to continue to move downward, needs to overcome the first spring 9a, second spring 9b to be total at this time
Same-action, compared to the quick movement of first stage, this 4th hydraulic fluid port X pressure increase of stage leads to the displacement of balance valve core 8
Reduce, because to overcome the active force of the first spring 9a and second spring 9b simultaneously.It is such to be advantageous in that, this phase balancing valve
Core 8 has been switched on control load movement that can be stable.Balance valve core 8 is set to generate the same displacement, the 4th oil of second stage
The mouth increased pressure of X is greater than the pressure of the 4th hydraulic fluid port X of first stage pressurization, because first stage balance valve core 8 is not opened, no
It is involved in the problems, such as that load stabilization moves, therefore the first stage can be made quickly to move, and the unlatching of second stage balance valve core 8 is related to
Stablize to load movement, therefore the increase of the 4th hydraulic fluid port X pressure will reduce the influence rate of 8 displacement of balance valve core.
Phase III: continue to increase the pressure value of the 4th hydraulic fluid port X, the pressure of the 4th hydraulic fluid port X passes through after the second through-flow slot 2b
It is applied in outer pilot valve 4, pressure at this time, which acts on the power generated in outer pilot valve 4, can overcome second spring
The active force of 9b, outer pilot valve 4 move downward, the left step surface of the second outer pilot valve through hole section and the first spring base 6
The right side of extension diameter section is in contact, and outer pilot valve 4 and interior pilot valve 5 drive balance valve core 8 to move downward jointly at this time.This
The increase in stage, the 4th hydraulic fluid port X pressure value becomes larger for the influence rate of 8 displacement of balance valve core.It is such to be advantageous in that, it is right
When loading lesser operating condition in the second hydraulic fluid port C, such as controlling for hoist engine, hoist engine hook is above non-loaded only to link up with itself
Weight, be equivalent to zero load, the problem of when hoist engine zero load is not related to load movement stability yet, therefore the 4th oil can be made
Mouth X pressure increases the influence rate of 8 displacement of balance valve core, can reduce the 4th hydraulic fluid port X compared with the existing technology in this way
Pressure, generate energy-efficient effect.
For the 8 displacement incrementss of balance valve core caused by the 4th every increase 0.5MPA of hydraulic fluid port X pressure, to illustrate the 4th
Influence rate of the hydraulic fluid port X pressure for 8 displacement of balance valve core.Such as: in the first stage, the 4th every increase of hydraulic fluid port X pressure
0.5MPA, 8 displacement of balance valve core increase 0.5mm；In second stage, the 4th every increase 0.5MPA of hydraulic fluid port X pressure, balance valve core
8 displacements increase 0.2mm；In the phase III, the 4th every increase 0.5MPA of hydraulic fluid port X pressure, 8 displacement of balance valve core increases
0.5mm.And in the prior art, for the stability contorting of proof load decline, the 4th hydraulic fluid port X pressure is displaced balance valve core 8
The influence rate of amount is the same.
(3) stopped process, the 4th hydraulic fluid port X pressure reduction push balance under the action of the first spring 9a, second spring 9b
Spool 8 moves to right, and valve port is shut, and the first hydraulic fluid port V and the second hydraulic fluid port C cut-off are obstructed.
As described above, the beneficial effects of the present invention are: compared with the prior art, the present invention is not influence load steady
Under the premise of fixed control, cracking pressure when can reduce the pilot pressure of the 4th hydraulic fluid port X, and load small or unloaded will be much smaller than
The prior art has very big energy-saving effect.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more, unless separately
There is clearly specific restriction.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are within the scope of the invention to above-mentioned implementation
Example be changed, modify, replacement and variant, each fall within protection scope of the present invention.
Claims (3)
1. a kind of pilot balance valve characterized by comprising
Valve body, the valve body have the valve body blind hole of opening to the right, and the valve body blind hole includes the first valve body blind hole from left to right
Section and the second valve body blind hole section, the aperture of the first valve body blind hole section are less than the aperture of the second valve body blind hole section；
Valve pocket, the valve pocket are located in the second valve body blind hole section, and the valve pocket includes that periphery wall and second valve body are blind
The valve pocket main paragraph that the internal perisporium in hole is in contact and the valve pocket undergauge section positioned at the valve pocket main paragraph right side, the valve pocket master
The left side of body section has the valve pocket through-hole of left and right perforation, institute against the right side of the first valve pocket blind hole section, the valve pocket
State valve pocket through-hole from left to right and include the first valve pocket through hole section, the second valve pocket through hole section and third valve pocket through hole section, described first
The aperture of valve pocket through hole section is greater than the aperture of the second valve pocket through hole section and the aperture of the first valve pocket through hole section and is less than institute
The aperture of the first valve body blind hole section is stated, the aperture of the second valve pocket through hole section is greater than the aperture of the third valve pocket through hole section；
Partition, the partition are located at the right side in the second valve body blind hole section and being located at the valve pocket, the left end of the partition
Face has the side that the valve pocket is penetrated through along the radial direction of the valve pocket on the right side of the valve pocket, the right side of the valve pocket
The first of wall is through-flow slot；
Outer pilot valve, the outer pilot valve include the outer guide that can be slidingly located in the first valve pocket through hole section
Spool main paragraph and the outer pilot valve undergauge section that can be slidingly located in the second valve pocket through hole section, the outer elder generation
Guide valve core has the outer pilot valve through-hole of left and right perforation, and the outer pilot valve through-hole includes being located at the outer pilot valve master
The first outer pilot valve through hole section in body section, the second outer pilot valve through-hole in the outer pilot valve undergauge section
Section and pilot valve in the outer pilot valve undergauge section and outside the third of the right side of the neighbouring outer pilot valve
The outer pilot valve main paragraph is protruded into through hole section, the left end of the second outer pilot valve through hole section to the left, outside described first
Pilot valve through hole section aperture is greater than the aperture of the described second outer pilot valve through hole section, the second outer pilot valve through hole section
Aperture be greater than the outer pilot valve through hole section of the third；
Interior pilot valve, the interior pilot valve include the interior guide that can be slidingly located in the third valve pocket through hole section
Spool main paragraph and left end are adapted with the outer pilot valve through hole section of the third and protrude into the described second outer pilot valve to the left
The interior pilot valve undergauge section of core through hole section；
First spring base, first spring base include be located at that the described second outer pilot valve through hole section is interior and outer diameter with it is described interior
The identical linkage section of outer diameter of pilot valve undergauge section and the extension diameter section being located in the described first outer pilot valve through hole section；
Valve casing, the left end of the valve casing are fixedly plugged in the right side in the second valve body blind hole section and being located at the partition, institute
The left side of valve casing is stated against the right side of the partition, the valve casing has the valve casing through-hole of left and right perforation, and the valve casing is logical
Hole includes the first valve casing through hole section, the second valve casing through hole section, the third valve casing through hole section and that aperture is changed from small to big from left to right
Four valve casing through hole sections, the aperture of the first valve casing through hole section are greater than the aperture of the third valve pocket through hole section and are less than the valve
The outer diameter of undergauge section is covered, is had on the side wall of the valve casing and is connected to the second valve casing through hole section and leads to adjacent to the third valve casing
First hydraulic fluid port of hole section；
Balance valve core, the balance valve core include the first balanced valve that can be slidingly located in the second valve opening through hole section
Core section, positioned at the first balance valve core section left side and the second balanced valve that can slidingly be located in the first valve casing through hole section
The third balance valve core section that core section and left end pass through the partition to the left and be connected with the interior pilot valve main paragraph, institute
The outer diameter for stating third balance valve core section is less than the outer diameter of the interior pilot valve main paragraph；
First spring, first spring are located in the first valve body blind hole section, and the left end of first spring is against described
The right end of the bottom surface of valve body blind hole and first spring is against the left side of first spring base；
Second spring, the second spring is located in the first valve body blind hole section and is socketed on first spring, described
The left end of second spring is against the bottom surface of the valve body blind hole and the right end of the second spring is against a left side for the valve pocket
End face, the internal diameter of the second spring are greater than described less than the outer diameter of the first valve pocket through hole section aperture and the second spring
First valve pocket through hole section aperture, the second spring often push to the right first spring base so that first spring base to
The right side often pushes the interior pilot valve, thus make the right side of the interior pilot valve often against the left side of the partition and to
The right side often pushes the balance valve core, so that the right end of the balance valve core in left part closes first hydraulic fluid port；
Third spring, the third spring are located at the described second outer pilot valve through hole section and are socketed in the interior pilot valve contracting
On the linkage section of diameter section and first spring base, the extension diameter section of the left end of the third spring against first spring base
The right end of right side and third spring pilot valve through hole section outside the third does step surface, the third spring
The outer pilot valve is often pushed to the right so that the right side of the outer pilot valve is often against the third valve pocket through hole section
Left step surface, at this point, in valve pocket described in the left side retraction to the right of the outer pilot valve and left end of the outer pilot valve
First preset distance of left end face interval in face and the valve pocket, the right side of the outer pilot valve main paragraph and second valve
Cover left the second preset distance of step face interval of through hole section；
Second spring seat, the second spring seat fixation are located in the 4th valve casing through hole section；
Nonreturn valve core, the nonreturn valve core include the nonreturn valve core that can slidingly cooperate in the third valve casing through hole section
Main paragraph and the list in the second spring seat can be cooperated positioned at the nonreturn valve core main paragraph right side and slidingly
To spool undergauge section, there is the nonreturn valve core through-hole of left and right perforation, the aperture of the nonreturn valve core through-hole on the nonreturn valve core
Less than the aperture of the second valve casing through hole section, the right end of the nonreturn valve core through-hole constitutes the second hydraulic fluid port；
4th spring, the 4th spring are socketed in the nonreturn valve core undergauge section, and the left end of the 4th spring is against institute
The right end of the right side of nonreturn valve core main paragraph and the 4th spring is stated against the second spring seat, the 4th spring to
A left side often push the nonreturn valve core so that the nonreturn valve core left side against the right side of the balance valve core to closing
First hydraulic fluid port, at this point, between the left side of the nonreturn valve core main paragraph and the right step surface of the second valve casing through hole section
Every third preset distance, the third preset distance is equal to first preset distance；
Wherein, in the first valve body blind hole section, the left side of the valve pocket, the left side of the outer pilot valve and institute
The left side for stating the first spring base limits the first control chamber, has on the side wall of the valve body and is connected to first control chamber
Third hydraulic fluid port, in the second valve body blind hole section, the periphery wall of the valve pocket undergauge section and the left side limit of the partition
The second control chamber is made, there is the 4th hydraulic fluid port for being connected to second control chamber, the outer pilot valve on the side wall of the valve body
Third control chamber is limited between the right side of core main paragraph and the left step surface of the second valve pocket through hole section, the valve pocket
There is the second through-flow slot for being connected to second control chamber and the third control chamber, in the outer pilot valve through-hole on side wall
Interior, the periphery wall of the periphery wall of the interior pilot valve and first spring base limits the 4th control chamber, and described first
There is the first through flow hole for being connected to first control chamber and the 4th control chamber, described first on the extension diameter section of spring base
In valve casing through hole section, the 5th control is defined between the right side of the partition and the left side of the second balance valve core section
Chamber has the runner for being connected to the 5th control chamber and the balance valve core right side on the balance valve core, described second
In valve casing through hole section, the outer peripheral surface of the second balance valve core section limits the 6th control chamber, has on the side wall of the valve casing
It is connected to the second through flow hole of the 6th control chamber.
2. pilot balance valve according to claim 1, which is characterized in that it further include third spring base, the third bullet
Spring abutment is located at the first valve body blind hole section and against the bottom surface of the valve body blind hole, the left end of first spring and described
The left end of two springs is against the right side of the third spring base.
3. pilot balance valve according to claim 2, which is characterized in that have on the right side of the third spring base
Interior positioning ring groove compatible with the left end of first spring and outer positioning compatible with the left end of the second spring
Annular groove, the left end of first spring cooperate in the interior positioning ring groove, and the left end cooperation of the second spring is described the
In two positioning ring grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810952010.3A CN108953705B (en) | 2018-08-21 | 2018-08-21 | Pilot balance valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810952010.3A CN108953705B (en) | 2018-08-21 | 2018-08-21 | Pilot balance valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108953705A true CN108953705A (en) | 2018-12-07 |
| CN108953705B CN108953705B (en) | 2019-08-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810952010.3A Active CN108953705B (en) | 2018-08-21 | 2018-08-21 | Pilot balance valve |
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| Country | Link |
|---|---|
| CN (1) | CN108953705B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111271486A (en) * | 2020-03-01 | 2020-06-12 | 东莞海特帕沃液压科技有限公司 | Pressure reducing valve |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003087638A1 (en) * | 2002-04-15 | 2003-10-23 | Spill Check Ltd. | Bidirectional check valve |
| CN107906236A (en) * | 2017-11-21 | 2018-04-13 | 嘉善海力达工具有限公司 | Anti-leak speed limit relief arrangement |
| CN107940051A (en) * | 2017-11-15 | 2018-04-20 | 宁波文泽机电技术开发有限公司 | A kind of precursor overflow valve of quick response |
-
2018
- 2018-08-21 CN CN201810952010.3A patent/CN108953705B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003087638A1 (en) * | 2002-04-15 | 2003-10-23 | Spill Check Ltd. | Bidirectional check valve |
| CN107940051A (en) * | 2017-11-15 | 2018-04-20 | 宁波文泽机电技术开发有限公司 | A kind of precursor overflow valve of quick response |
| CN107906236A (en) * | 2017-11-21 | 2018-04-13 | 嘉善海力达工具有限公司 | Anti-leak speed limit relief arrangement |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111271486A (en) * | 2020-03-01 | 2020-06-12 | 东莞海特帕沃液压科技有限公司 | Pressure reducing valve |
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| Publication number | Publication date |
|---|---|
| CN108953705B (en) | 2019-08-30 |
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Effective date of registration: 20190806 Address after: 224700 Yanqiao Village, Jinhu Town, Jianhu County, Yancheng City, Jiangsu Province Applicant after: JIANHU BADA HYDRAULIC MACHINERY CO., LTD. Address before: 523000 Dongguan City, Guangdong Province, Songshan Lake High-tech Industrial Development Zone Headquarters, No. 2, No. 1 District, No. 2, No. 201 Applicant before: Dongguan hate Paavo Hydraulic Technology Co., Ltd. |
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