CN108709000A - A kind of flow type balanced valve of setting pressure automatic adjustment - Google Patents
A kind of flow type balanced valve of setting pressure automatic adjustment Download PDFInfo
- Publication number
- CN108709000A CN108709000A CN201810962772.1A CN201810962772A CN108709000A CN 108709000 A CN108709000 A CN 108709000A CN 201810962772 A CN201810962772 A CN 201810962772A CN 108709000 A CN108709000 A CN 108709000A
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- Prior art keywords
- hole
- valve
- section
- valve pocket
- piston
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
- F16K17/065—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure with differential piston
Abstract
The present invention proposes that a kind of flow type balanced valve of setting pressure automatic adjustment includes：Valve pocket, end plug, piston, balance valve core, valve seat, the first spring, spring base, check valve sheet, second spring.The flow type balanced valve of setting pressure automatic adjustment according to the ... of the embodiment of the present invention, processing is simple, and area of passage is long without mutation, energy saving and service life.
Description
Technical field
The present invention relates to a kind of valve modules of hydraulic device, relate in particular to a kind of stream of setting pressure automatic adjustment
Amount type balanced valve.
Background technology
In the mechanical equipments such as modern engineering machinery, building machinery, raising hydraulic circuit, wherein balanced valve have been widely applied
It is the key that hydraulic cylinder work Hydraulic Elements, the quality for balancing valve performance directly affect the property of host in control hoisting circuit
Energy.
Existing such a disadvantage of hydraulically balanced valve generally existing：When loading decentralization, due to hydraulically balanced valve valve port
Area of passage will produce the characteristics of mutation, and load can be made to generate the phenomenon that low-frequency jitter is with impact, cause system unstable, influenced
The security reliability of complete machine.When load decentralization and load rise by be same valve port, can all generate restriction effect, and practical
Middle load does not need throttling action when rising, and seriously affects the efficiency of operation.Need parallel connection one single to solve the problems, such as this also
To valve, expense is virtually increased.Balanced valve spring setting pressure be it is constant, it is anti-for different load behavior balanced valves
To Opening pressure be all changeless, need to open the control pressure of balanced valve and negative for loading lower operating mode in this way
It is the same to carry higher operating mode, will produce prodigious energy loss in this way, not energy-efficient.
Invention content
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 a kind of processing is simple, area of passage is without mutation, energy-efficient balance
Valve.
A kind of balanced valve according to the ... of the embodiment of the present invention, including：
Valve pocket, it includes the first valve pocket from top to bottom that the valve pocket, which has valve pocket through-hole up and down, the valve pocket through-hole,
Through hole section, the second valve pocket through hole section, third valve pocket through hole section, the 4th valve pocket through hole section and the 5th valve pocket through hole section, described
The aperture in the aperture of one valve pocket through hole section, the aperture of the second valve pocket through hole section and the third valve pocket through hole section is from top to bottom
It is sequentially reduced, the aperture of the third valve pocket through hole section, the aperture of the 4th valve pocket through hole section and the 5th valve pocket through-hole
The aperture of section is sequentially increased from top to bottom, there is outward opening to be respectively positioned on first-class on the periphery wall of the valve pocket on the valve pocket
Road, second flow channel and through flow hole, the inner opening of the first flow are located at the appearing on the stage on terrace of the second valve pocket through hole section, institute
The inner opening for stating second flow channel is located on the internal perisporium of the second valve pocket through hole section and adjacent to the third valve pocket through hole section
The inner opening for terrace and the second flow channel of appearing on the stage is configured to the first damping hole, and the inner opening of the through flow hole is located at the described 4th
Leave from office terrace on the internal perisporium of valve pocket through hole section and adjacent to the third valve pocket through hole section, wherein outside the first flow
The outward opening of opening and the through flow hole constitutes the first hydraulic fluid port, and the outward opening of the second flow channel constitutes the second hydraulic fluid port；
End plug, the end plug are located at the upper opening for closing the valve pocket through-hole on the valve pocket, have on the end plug
There are the end plug blind hole that Open Side Down, the aperture of the end plug blind hole to be less than the aperture of the first valve pocket through hole section；
Piston, the piston include piston epimere compatible with the end plug blind hole and with the first valve pocket through hole section
Compatible piston hypomere, the piston epimere can slide up and down to cooperation in the end plug blind hole, and the piston hypomere can
Coordinate up or down in the first valve pocket through hole section, the first piston with opening upwards is blind on the piston epimere
Hole has the second piston blind hole that Open Side Down on the piston hypomere, and the first piston blind hole and the second piston are blind
It is connected to by the second damping hole between hole；
Valve seat, the valve seat fixation are located in the 5th valve pocket through hole section, and the valve seat is equipped with the valve axially penetrated through
Block hole, the top of the valve seat through-hole is equipped with inner conical surface, and multiple axially penetrate through along the circumferential direction is evenly equipped on the valve seat
Valve seat through flow hole；
The upper end of spring base, the spring base is located in the 5th valve pocket through hole section and forms fixed company with the valve pocket
It connects, the upper surface of the spring base and the lower face of the valve seat offset, and the lower end of the spring base extends downwardly the valve pocket
Outside, the spring base is internally provided with the notch cuttype through hole axially penetrated through, and the under shed of the notch cuttype through hole constitutes third hydraulic fluid port；
Balance valve core, the balance valve core include the first balance valve core section compatible with the second piston blind hole, with
The second valve pocket through hole section is adapted and the second balance valve core section below the first balance valve core section, with described the
Three valve pocket through hole sections are adapted and the third balance valve core section below the second balance valve core section and logical with the valve seat
Hole is adapted and the 4th balance valve core section below the third balance valve core section, and the first balance valve core section can be upper and lower
It is fitted slidably in the second piston blind hole, the second balance valve core section can slide up and down to cooperation in second valve
It covering in through hole section, the third balance valve core section can slide up and down to cooperation in the third valve pocket through hole section, and the described 4th
Balance valve core section can slide up and down cooperation in the valve seat through-hole and extend downwardly into the spring base notch cuttype through hole, institute
The side wall upper edge for stating the 4th balance valve core section is axially arranged with to be connected to the third hydraulic fluid port and the 4th valve pocket through hole section
There is balance valve core through-hole up and down, the balance valve core through-hole to be damped equipped with third for throttling channel, the balance valve core
Hole；
First spring, first spring are located in the second piston blind hole, and the upper end of first spring is against institute
The lower end of the bottom surface of second piston blind hole and first spring is stated against the upper surface of the first balance valve core section, described
One spring often pushes the piston upwards so that the upper surface of the piston hypomere is against the lower face of the end plug, and described first
Spring often push the balance valve core downwards so that the third balance valve core section lower face against the valve seat inner conical surface
On to separate being connected to for third hydraulic fluid port and the 4th valve pocket through hole section；
Check valve sheet, the check valve sheet are located in the notch cuttype through hole of the spring base, are equipped in the check valve sheet
The check valve sheet through-hole axially penetrated through, the aperture of the check valve sheet through-hole are more than the diameter of the 4th balance valve core section；
Second spring, second spring set in the notch cuttype through hole of the spring base, the second spring it is upper
End is resisted against against the lower end of the lower face of the check valve sheet and the second spring on the step of the spring base endoporus, institute
It states second spring and often pushes the check valve sheet upwards so that the upper surface of the check valve sheet is against the lower face of the valve seat
To close the valve seat through flow hole；
Wherein, in the end plug blind hole, the first control chamber is defined between the end plug and the piston epimere, in institute
It states in second piston blind hole, the second control chamber is defined between the first balance valve core section and the piston hypomere, described
In valve pocket through-hole, third control chamber is defined between the piston and the balance valve core, in the second balance valve core section
The 4th control chamber compatible with first damping hole is formed on periphery wall；
It is S1 to enable the axial cross section of the third balance valve core section accumulate, the axial cross section of second piston blind hole product is
S2, the end plug blind hole axial cross section product be S3, the axial cross section of the second valve pocket through hole section accumulates is S4, then S1, S2, S3
Meet (S3-S2)/(S1-S2)=1.3, and (S4-S1)/(S1-S2) > 3 between S4.
Advantageously, the throttling channel is a plurality of and along the circumference uniform distribution of the 4th balance valve core section.
Advantageously, the end plug is connect with the threaded upper ends of the valve pocket through-hole.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
Fig. 1 is the structural representation of the flow type balanced valve of setting pressure automatic adjustment according to an embodiment of the invention
Figure；
Fig. 2 is the hydraulic pressure of the flow type balanced valve balanced valve of setting pressure automatic adjustment according to an embodiment of the invention
Schematic diagram；
Fig. 3 is a kind of applied field of the flow type balanced valve of setting pressure automatic adjustment according to an embodiment of the invention
The hydraulic schematic diagram of scape.
Specific implementation mode
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 for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings come be described in detail it is according to the ... of the embodiment of the present invention it is a kind of setting pressure automatic adjustment flow type
Balanced valve.
As shown in Figure 1 to Figure 3, the flow type balanced valve of a kind of setting pressure automatic adjustment according to the ... of the embodiment of the present invention,
Including：Valve pocket 1, end plug 2, piston 3, balance valve core 4, the first spring 5, valve seat 6, check valve sheet 7, second spring 8, spring base 9.
Specifically, valve pocket 1 has valve pocket through-hole up and down.The valve pocket through-hole includes the first valve pocket from top to bottom
Through hole section, the second valve pocket through hole section, third valve pocket through hole section, the 4th valve pocket through hole section and the 5th valve pocket through hole section, described
The aperture in the aperture of one valve pocket through hole section, the aperture of the second valve pocket through hole section and the third valve pocket through hole section is from top to bottom
It is sequentially reduced, the aperture of the third valve pocket through hole section, the aperture of the 4th valve pocket through hole section and the 5th valve pocket through-hole
The aperture of section is sequentially increased from top to bottom, there is outward opening to be respectively positioned on first-class on the periphery wall of the valve pocket on the valve pocket
The inner opening of road 101, second flow channel 102 and through flow hole 103, the first flow 101 is located at the second valve pocket through hole section
It appears on the stage on terrace, the inner opening of the second flow channel 102 is located on the internal perisporium of the second valve pocket through hole section and adjacent to described
The inner opening of appear on the stage terrace and the second flow channel 102 of third valve pocket through hole section is configured to the first damping hole 104, described through-flow
The inner opening in hole 103 is located at getting out of a predicament or an embarrassing situation on the internal perisporium of the 4th valve pocket through hole section and adjacent to the third valve pocket through hole section
Face, wherein the outward opening of the outward opening of the first flow 101 and the through flow hole 103 constitutes the first hydraulic fluid port V, and described the
The outward opening of two runners 102 constitutes the second hydraulic fluid port X.
End plug 2 is located at the upper opening for closing valve pocket through-hole on valve pocket 1, has the end plug that Open Side Down blind on end plug 2
Hole, the aperture of the end plug blind hole are less than the aperture of the first valve pocket through hole section.Advantageously, end plug 2 and the valve pocket through-hole
Threaded upper ends connection.
Piston 3 includes piston epimere compatible with the end plug blind hole and compatible with the first valve pocket through hole section
Piston hypomere, the piston epimere can slide up and down to cooperation, and (slide up and down refers to relevant two in the end plug blind hole
Component is in contact, similarly hereinafter), the piston hypomere can coordinate up or down (to be moved up and down in the first valve pocket through hole section
Refer to not contacting between relevant two components, similarly hereinafter), the first piston blind hole with opening upwards on the piston epimere,
There is the second piston blind hole that Open Side Down on the piston hypomere, the first piston blind hole and the second piston blind hole it
Between pass through the second damping hole 301 be connected to.
The fixation of valve seat 6 is located in the 5th valve pocket through hole section, and the valve seat 6 is equipped with the valve seat through-hole axially penetrated through,
The top of the valve seat through-hole is equipped with inner conical surface, and it is logical that multiple valve seats axially penetrated through are along the circumferential direction evenly equipped on the valve seat 6
Discharge orifice 61.
The upper end of spring base 9 is located in the 5th valve pocket through hole section and forms a fixed connection with the valve pocket 1, the bullet
The upper surface of spring abutment 9 and the lower face of the valve seat 6 offset, and the lower end of the spring base 9 extends downwardly outside the valve pocket 1, institute
It states spring base 9 and is internally provided with the notch cuttype through hole axially penetrated through, the under shed of the notch cuttype through hole constitutes third hydraulic fluid port C.
Balance valve core 4 includes the first balance valve core section compatible with the second piston blind hole and second valve pocket
Through hole section is adapted and the second balance valve core section below the first balance valve core section, with the third valve pocket through hole section
It is adapted and the third balance valve core section below the second balance valve core section and is adapted with the valve seat through-hole and position
The 4th balance valve core section below the third balance valve core section, the first balance valve core section can slide up and down to cooperation and exist
In the second piston blind hole, the second balance valve core section can slide up and down to cooperation in the second valve pocket through hole section,
The third balance valve core section can slide up and down to cooperation in the third valve pocket through hole section, and the 4th balance valve core section can
The cooperation slided up and down is in the valve seat through-hole and extends downwardly into 9 notch cuttype through hole of the spring base, the 4th balance
The side wall upper edge of spool section is axially arranged with to be connected to the throttling channel 403 of the third hydraulic fluid port C and the 4th valve pocket through hole section,
Advantageously, the throttling channel is a plurality of and along the circumference uniform distribution of the 4th balance valve core section.The balance valve core 4 has up and down
The balance valve core through-hole 401 of perforation, the balance valve core through-hole are equipped with third damping hole 402.
First spring 5 is located in the second piston blind hole, and the upper end of the first spring 5 is against the second piston blind hole
Bottom surface and the lower end of the first spring 5 are against the upper surface of the first balance valve core section.First spring 5 often pushes piston 3 upwards
So that the upper surface of the piston hypomere, against the lower face of end plug 2, the first spring 5 often pushes balance valve core 4 so that institute downwards
State the lower face of third balance valve core section against on the inner conical surface of the valve seat 6 to separate third hydraulic fluid port C and the 4th valve pocket
The connection of through hole section.
Check valve sheet 7 is located in the notch cuttype through hole of spring base 9, and the check valve sheet axially penetrated through is equipped in check valve sheet 7
Through-hole, the aperture of the check valve sheet through-hole are more than the diameter of the 4th balance valve core section.
Second spring 8 is located in the notch cuttype through hole of spring base 9, and the upper end of second spring 8 is against the check valve sheet 7
The lower face and lower end of the second spring 8 is resisted against on the step of 9 endoporus of the spring base, second spring 8 often push upwards
Check valve sheet 7 so that check valve sheet 7 upper surface against the lower face of valve seat 6 to closed valve seat through flow hole 61.
Wherein, in the end plug blind hole, the first control chamber 1a is defined between the end plug and the piston epimere.
In the second piston blind hole, the second control chamber 1b is defined between the first balance valve core section and the piston hypomere.
In the valve pocket through-hole, third control chamber 1c is defined between the piston 3 and the balance valve core 4.In second balance
Fourth control chamber 1d compatible with first damping hole is formed on the periphery wall of spool section.
Enable third balance valve core section axial cross section accumulate be S1, the second piston blind hole axial cross section accumulate be S2, institute
The axial cross section product for stating first piston blind hole is S3, the axial cross section of the second valve pocket through hole section product is S4, then S1, S2, S3
Meet (S3-S2)/(S1-S2)=1.3, and (S4-S1)/(S1-S2) > 3 between S4.
The unlatching setting pressure of balance valve core 4 is set automatically by the pressure of third hydraulic fluid port C, the unlatching of balance valve core 4
Pressure is 1.3 times of third hydraulic fluid port C pressure always.This is because third hydraulic fluid port C pressure acts on conjunction upward on balance valve core 4
Force effect area is S1-S2, and the active area that third hydraulic fluid port C acts on the resultant force generated to the first spring 5 on piston 3 is
S3-S2, and (S3-S2)/(S1-S2)=1.3, so the first spring 5 sets pressure as 1.3 times of third hydraulic fluid port C pressure, together
When third hydraulic fluid port C is more than certain pressure, piston 3 can move to the lower face of piston 3 and the second valve pocket through hole section
Terrace of appearing on the stage contacts, and reaches maximum set pressure, that is, Maximum safe pressure at this time.Such benefit is, as third hydraulic fluid port C
When pressure is relatively low, such as third hydraulic fluid port C pressure is 5MPA, then moves downward opening for compression the first spring 5 setting by piston 3
It is 6.5MPA to open pressure, and the pressure of the second hydraulic fluid port X needs to reach 6.5/ hydraulic control ratio at this time, can upwardly open balance valve core 4.
The ratio of hydraulic control herein is constant=(S4-S1)/(S1-S2) > 3.It is when third hydraulic fluid port C pressure is 20MPA, then downward by piston 3
As 26MPA, the pressure of the second hydraulic fluid port X needs to reach 26/ hydraulic control ratio the Opening pressure that the first spring of motion compresses 5 is set, can be with
Balance valve core 4 is upwardly opened.As can be seen from the above when loading smaller, the present invention can reduce the pressure of the second hydraulic fluid port X,
No matter load Opening pressure is fixed unlike the prior art, can reach energy-efficient effect in this way.
It following is a brief introduction of the course of work of balanced valve according to the ... of the embodiment of the present invention.
As shown in figure 3, in application, the first hydraulic fluid port V is connected with the hydraulic fluid port A of reversal valve 10, third hydraulic fluid port C and hydraulic cylinder 11
Rodless cavity be connected, the rod chamber of the second hydraulic fluid port X and hydraulic cylinder 11 is connected with the hydraulic fluid port B of reversal valve 10.
(1) uphill process, the pressure oil of reversal valve 10 reach the first hydraulic fluid port V of balanced valve, in the pressure oil of the first hydraulic fluid port V
A part by first flow 101 enter third control chamber 1c, so that piston 3 and balance valve core 4 is kept position as shown in Figure 1
It sets.Another part in the pressure oil of first hydraulic fluid port V is moved downward by the promotion of valve seat through flow hole 61 check valve sheet 7 overcomes second
The active force of spring 8 opens valve seat through flow hole 61, and oil flows into the rodless cavity that third hydraulic fluid port C reaches hydraulic cylinder 11 through the first hydraulic fluid port V,
Push 11 uplink of hydraulic cylinder.This stage fluid flows into third hydraulic fluid port C by the first hydraulic fluid port V and does not have throttling action.
(2) during declining, reversal valve 10 commutates, and the pressure oil of the second hydraulic fluid port X enters the by the first damping hole 104
Four control chamber 1d are applied on balance valve core 4, and the active force of the first spring 5, balance valve core 4 is overcome to move up, and first open valve seat 6
Inner conical surface, the second hydraulic fluid port X pressure increase, and balance valve core 4 just moves up further, and are covered in by diameter before gradually exposing each
Throttling channel 403, such area of passage are that mitigation is increased, and load lowering velocity can be precisely controlled.
(3) stopped process, the second hydraulic fluid port X pressure reductions, the first spring 5 push balance valve core 4 to move down, and area of passage is gradual
It reduces, valve port is shut.
(4) in stopped process, since when outer force effect, which makes load pressure generate, impacts larger, piston 3 has moved
It being contacted to the lower face of piston 3 with the terrace of appearing on the stage of the second valve pocket through hole section, the first spring 5 reaches maximum set pressure,
Third hydraulic fluid port C pressure hydraulic oil is applied on the annular active area (S1-S2) of balance valve core 4, if surge is more than the
The active force of one spring 5, balance valve core 4 will quickly open throttling channel 403, and compression shock buffering is fallen.
That is, circumference uniform distribution of (1) throttling channel 403 along the 4th balance valve core section side wall, when balance valve core 4 to
When valve port is opened in upper movement, the connection area that throttling channel 403 can be gradually controlled by the pressure size of the second hydraulic fluid port X is big
It is small, area of passage variation can be accurately controlled, to accurate flow control.
(2) when load rises by be valve port between valve seat through flow hole 61, check valve sheet 7；Load passes through when declining
Be throttling channel 403；Lower reduction of speed can be controlled when loading speed when rising in this way to be unaffected, and declining by throttling
Degree.
(3) it is the unlatching of check valve sheet 7 when load rises；Load decline when by be balance valve core 4 unlatching；It compares
In the prior art, can reduce in this way check valve sheet 7, balance valve core 4 and valve seat 6 shock number, and then increase using the longevity
Life.
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 ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply 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 this feature.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；Can be that machinery connects
It connects, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary in two elements
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 can be with "above" or "below" second feature
It is that the first and second features are in direct 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
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is 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 embodiments or example.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 is changed, changes, replacing and modification, each falls within protection scope of the present invention.
Claims (3)
1. a kind of flow type balanced valve of setting pressure automatic adjustment, which is characterized in that including：
Valve pocket, it includes the first valve pocket through-hole from top to bottom that the valve pocket, which has valve pocket through-hole up and down, the valve pocket through-hole,
Section, the second valve pocket through hole section, third valve pocket through hole section, the 4th valve pocket through hole section and the 5th valve pocket through hole section, first valve
Cover the aperture in the aperture of through hole section, the aperture of the second valve pocket through hole section and the third valve pocket through hole section from top to bottom successively
Reduce, the aperture of the third valve pocket through hole section, the aperture of the 4th valve pocket through hole section and the 5th valve pocket through hole section
Aperture is sequentially increased from top to bottom, on the valve pocket with outward opening be respectively positioned on first flow on the periphery wall of the valve pocket,
Second flow channel and through flow hole, the inner opening of the first flow is located at the appearing on the stage on terrace of the second valve pocket through hole section, described
The inner opening of second flow channel is located on the internal perisporium of the second valve pocket through hole section and adjacent to the upper of the third valve pocket through hole section
Step surface and the inner opening of the second flow channel are configured to the first damping hole, and the inner opening of the through flow hole is located at the 4th valve
Cover the leave from office terrace on the internal perisporium of through hole section and adjacent to the third valve pocket through hole section, wherein the external-open of the first flow
The outward opening of mouth and the through flow hole constitutes the first hydraulic fluid port, and the outward opening of the second flow channel constitutes the second hydraulic fluid port；
End plug, the end plug are located at the upper opening for closing the valve pocket through-hole on the valve pocket, have on the end plug and open
The downward end plug blind hole of mouth, the aperture of the end plug blind hole are less than the aperture of the first valve pocket through hole section；
Piston, the piston include piston epimere compatible with the end plug blind hole and are mutually fitted with the first valve pocket through hole section
The piston hypomere matched, the piston epimere can slide up and down to cooperation in the end plug blind hole, and the piston hypomere can be upper and lower
Movably coordinate in the first valve pocket through hole section, the first piston blind hole with opening upwards, institute on the piston epimere
Stating has the second piston blind hole that Open Side Down on piston hypomere, between the first piston blind hole and the second piston blind hole
It is connected to by the second damping hole；
Valve seat, the valve seat fixation are located in the 5th valve pocket through hole section, and it is logical that the valve seat is equipped with the valve seat axially penetrated through
The top in hole, the valve seat through-hole is equipped with inner conical surface, and multiple valve seats axially penetrated through are along the circumferential direction evenly equipped on the valve seat
Through flow hole；
The upper end of spring base, the spring base is located in the 5th valve pocket through hole section and forms a fixed connection with the valve pocket,
The upper surface of the spring base and the lower face of the valve seat offset, and the lower end of the spring base extends downwardly outside the valve pocket,
The spring base is internally provided with the notch cuttype through hole axially penetrated through, and the under shed of the notch cuttype through hole constitutes third hydraulic fluid port；
Balance valve core, the balance valve core include the first balance valve core section compatible with the second piston blind hole, with it is described
Second valve pocket through hole section is adapted and the second balance valve core section below the first balance valve core section, with the third valve
Set through hole section be adapted and the third balance valve core section below the second balance valve core section and with the valve seat through-hole phase
It is adapted to and the 4th balance valve core section below the third balance valve core section, the first balance valve core section can slide up and down
Ground coordinates in the second piston blind hole, and it is logical in second valve pocket that the second balance valve core section can slide up and down to cooperation
In hole section, the third balance valve core section can slide up and down to cooperation in the third valve pocket through hole section, the 4th balance
The cooperation that can slide up and down of spool section in the valve seat through-hole and extends downwardly into the spring base notch cuttype through hole, and described the
The side wall upper edge of four balance valve core sections is axially arranged with to be connected to the throttling of the third hydraulic fluid port and the 4th valve pocket through hole section
There is balance valve core through-hole up and down, the balance valve core through-hole to be equipped with third damping hole for slot, the balance valve core；
First spring, first spring are located in the second piston blind hole, and the upper end of first spring is against described
The bottom surface of two piston blind holes and the lower end of first spring are against the upper surface of the first balance valve core section, first bullet
Spring often pushes the piston upwards so that the upper surface of the piston hypomere is against the lower face of the end plug, first spring
Often push the balance valve core downwards so that the third balance valve core section lower face against on the inner conical surface of the valve seat with
Partition third hydraulic fluid port is connected to the 4th valve pocket through hole section；
Check valve sheet, the check valve sheet are located in the notch cuttype through hole of the spring base, are equipped in the check valve sheet axial
Perforative check valve sheet through-hole, the aperture of the check valve sheet through-hole are more than the diameter of the 4th balance valve core section；
Second spring, the second spring are located in the notch cuttype through hole of the spring base, the upper end of the second spring against
The lower face of the check valve sheet and the lower end of the second spring are resisted against on the step of the spring base endoporus, and described second
Spring often push the check valve sheet upwards so that the check valve sheet upper surface against the lower face of the valve seat to seal
Close the valve seat through flow hole；
Wherein, in the end plug blind hole, the first control chamber is defined between the end plug and the piston epimere, described
In two piston blind holes, the second control chamber is defined between the first balance valve core section and the piston hypomere, in the valve pocket
In through-hole, third control chamber is defined between the piston and the balance valve core, in the periphery of the second balance valve core section
The 4th control chamber compatible with first damping hole is formed on wall；
Enable the third balance valve core section axial cross section accumulate be S1, the second piston blind hole axial cross section accumulate be S2, institute
The axial cross section product for stating end plug blind hole is S3, the axial cross section of the second valve pocket through hole section product is S4, then S1, S2, S3 and S4
Between meet (S3-S2)/(S1-S2)=1.3, and (S4-S1)/(S1-S2) > 3.
2. the flow type balanced valve of setting pressure automatic adjustment according to claim 1, which is characterized in that the throttling channel
It is a plurality of and along the circumference uniform distribution of the 4th balance valve core section.
3. it is according to claim 1 setting pressure automatic adjustment flow type balanced valve, which is characterized in that the end plug with
The threaded upper ends of the valve pocket through-hole connect.
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| CN201810962772.1A CN108709000B (en) | 2018-08-22 | 2018-08-22 | A kind of flow type balanced valve of setting pressure automatic adjustment |
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| CN201810962772.1A CN108709000B (en) | 2018-08-22 | 2018-08-22 | A kind of flow type balanced valve of setting pressure automatic adjustment |
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| CN108709000B CN108709000B (en) | 2019-11-15 |
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| CN110486512A (en) * | 2019-08-23 | 2019-11-22 | 段井胜 | A kind of safety valve |
| CN110686105A (en) * | 2019-10-12 | 2020-01-14 | 段井胜 | Pilot-operated type pressure reducing valve |
| CN111660439A (en) * | 2020-06-16 | 2020-09-15 | 邵立坤 | Motor control device for concrete mixer truck |
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|---|---|
| CN108709000B (en) | 2019-11-15 |
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Effective date of registration: 20191024 Address after: 317609 valve industrial park, Yuhuan City, Taizhou City, Zhejiang Province (Longxi town) Applicant after: Zhejiang stante Valve Co., Ltd Address before: 528000 255, 1 floor of 1 harvest 1 Street, Chao'an Road, Chancheng District, Foshan, Guangdong Applicant before: Foshan Xin Zhu Pu Si Machinery Technology Co., Ltd. |
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