CN105387012B - Control valve block for balance valve - Google Patents
Control valve block for balance valve Download PDFInfo
- Publication number
- CN105387012B CN105387012B CN201510740878.3A CN201510740878A CN105387012B CN 105387012 B CN105387012 B CN 105387012B CN 201510740878 A CN201510740878 A CN 201510740878A CN 105387012 B CN105387012 B CN 105387012B
- Authority
- CN
- China
- Prior art keywords
- valve
- oil
- oil duct
- work
- work oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a control valve block for a balance valve. A one-way valve cavity and a reversing valve cavity are formed in a valve body. A first spring and a one-way valve element are assembled in the one-way valve cavity from front to back. After being communicated through a first work oil way and a second work oil way, a first work oil opening and a second work oil opening are communicated with the rear end of the one-way valve cavity through a fourth work oil way, and the front end of the one-way valve cavity is communicated with a third work oil opening through a third work oil way. A second spring and a reversing valve element are assembled in the reversing valve cavity from left to right. The reversing valve cavity is communicated with the third work oil way and an oil returning opening through a fifth work oil way and a backflow oil way. The right end of the reversing valve cavity is communicated with the second work oil way through a sixth work oil way. An annular oil groove is formed in the middle of the reversing valve element. An energy accumulator is assembled in the third work oil opening in a sealing manner. The second work oil way is provided with an adjustable damping device used for stabilizing the oil pressure of the oil inlet side of the fourth work oil way. According to the control valve block, phenomena of impact and vibration in a control loop of the balance valve can be effectively removed, and the control stability can be improved.
Description
Technical field
The present invention relates to technical field of hydraulic, and in particular to a kind of control valve block for balanced valve.
Background technology
With the fast development of China's economic construction, various engineering machinery are widely used.The fortune of engineering machinery
Dynamic control adopts hydraulic drive and control, and in such hydraulic circuit, balanced valve plays an important role.
Balanced valve be it is a kind of can positive freedom open, reverse through-flow controlled special service valve, be used for controlling negative sense load work
Hydraulic actuator under condition, to ensure the safe action of the executor in the case where load is acted on.The luffing action of such as crane, volume
Lifting action raised etc..Balanced valve is the critical component in hydraulic system, and the quality of balanced valve control performance directly influences liquid
The service behaviour of pressure system and whole machine.And balanced valve control loop is the important component part of balanced valve, its performance and structure are excellent
The quality of the bad control performance for determining balanced valve.
Traditional balanced valve can produce fluctuation due to control pressure with the change of system pressure, therefore in practical application
In, the aperture of balanced valve is suddenly big or suddenly small with the fluctuation of system pressure, and low frequency occurs when carrying and declining in quick commutation or band
The phenomenon of vibration, is commonly called as shake.Particularly bear negative sense load and control executive component low-speed motion i.e. balanced valve valve port compared with
Under little situation, because system working pressure is the fluctuation of control pressure, whole system shows poor controllability, and it is unreliable to work
Problem.
Some balanced valves set up bypass draining oil circuit by the damping rear in traditional balanced valve control loop, can be with
To a certain degree reduce the compression shock in balanced valve control loop.But, the adjustable damping in the program is reformed into once setting up
Fixed damping, it is impossible to be automatically adjusted according to different operating modes, therefore, its control effect is bad.
The content of the invention
For the problem that above-mentioned prior art is present, the present invention provides a kind of control valve block for balanced valve, the control
Valve block can effectively eliminate impact and jitter phenomenon in balanced valve control loop, can be automatically adjusted according to different operating modes,
The control stationarity of balanced valve can effectively be improved.
To achieve these goals, the present invention provides a kind of control valve block for balanced valve, including valve body, the valve body
Be provided with the first actuator port, the second actuator port, the 3rd actuator port and oil return opening, be provided with the valve body unidirectional valve pocket,
Commutation valve pocket, the check valve intracavity portion is equipped with from front to back the first spring and nonreturn valve core, the first actuator port, the second work
Make hydraulic fluid port to work the rear end of oil duct and unidirectional valve pocket by first Jing the 4th again that works after oil duct, the second work oil duct connection respectively
Connection, the front end of unidirectional valve pocket is connected by the 3rd work oil duct with the 3rd actuator port, and the right-hand member of nonreturn valve core passes through first
Spring coordinates to control the connection or disconnection of the 4th work oil duct and unidirectional valve pocket with the rear end of unidirectional valve pocket, and commutation valve pocket is by a left side
Second spring and reversing valve core are equipped with to the right side, commutation valve pocket is respectively by the 5th work oil duct, backflow oil duct and the 3rd work
Oil duct, oil return opening connection, commutation valve pocket right-hand member is connected by the 6th work oil duct with the second work oil duct, the middle part of reversing valve core
Annular oil groove is provided with, the annular oil groove can control oil between the 5th work oil duct and backflow oil duct in reversing valve core moving process
The regulation of road openings of sizes or the disconnection of oil circuit；Sealing on 3rd actuator port is equipped with accumulator；Set on second work oil duct
It is equipped with for the adjustable damping of the steady 4th work oil duct oil-feed side oil pressure.
Also include the adjusting screw rod for adjusting second spring pre compressed magnitude, one end of the adjusting screw rod penetrates valve body simultaneously
It is connected with the left end of second spring.
When the present invention is applied to balanced valve, its first actuator port is connected with the control mouth of balanced valve, and adjustable damping is first
The fluctuation of balanced valve control mouth pressure can be reduced, meanwhile, when balanced valve control mouth pressure oscillation is less, accumulator can lead in time
Absorption pressure oil is crossed further to reduce the fluctuation at balanced valve control mouth, when fluctuating larger, reversing valve core can be by the 5th
Work oil duct is connected with backflow oil duct, the outer row of partial pressure oil is reduced fluctuating with further, accordingly, it is capable to according to different operating modes
It is automatically adjusted.This valve block can be effectively reduced the pressure oscillation at balanced valve control mouth, and then can eliminate balanced valve control
Impact and jitter phenomenon in loop processed, can effectively improve the stationarity of balanced valve control.
Description of the drawings
Fig. 1 is the structural representation of invention；
Fig. 2 be Fig. 1 along A-A to sectional view；
Fig. 3 is the hydraulic schematic diagram of the present invention；
Fig. 4 is the hydraulic schematic diagram that the present invention coordinates with balanced valve.
In figure：1st, valve body, the 2, first actuator port, the 3, second actuator port, the 4, the 3rd actuator port, 5, oil return opening, 6,
Unidirectional valve pocket, 7, commutation valve pocket, the 8, first spring, 9, nonreturn valve core, the 10, first work oil duct, the 11, second work oil duct, 12,
3rd work oil duct, the 13, the 4th work oil duct, the 14, the 5th work oil duct, 15, backflow oil duct, 16, second spring, 17, commutation
Valve element, the 18, the 6th work oil duct, 19, annular oil groove, 20, accumulator, 21, adjustable damping, 22, adjusting screw rod, 23, check valve,
24th, Hydraulically-controproportional proportional valve, 25, balanced valve, 26, hydraulic cylinder.
Specific embodiment
Below in conjunction with the accompanying drawings the invention will be further described.
As depicted in figs. 1 and 2, a kind of control valve block for balanced valve, including valve body 1, the valve body 1 is provided with first
Unidirectional valve pocket 6, commutation are provided with actuator port 2, the second actuator port 3, the 3rd actuator port 4 and oil return opening 5, the valve body 1
Valve pocket 7, is equipped with from front to back the first spring 8 and nonreturn valve core 9, the first actuator port 2, second inside the unidirectional valve pocket 6
Actuator port 3 respectively by first work oil duct 10, second work oil duct 11 connect after again Jing the 4th work oil duct 13 with it is unidirectional
The rear end connection of valve pocket 6, the front end of unidirectional valve pocket 6 is connected by the 3rd work oil duct 12 with the 3rd actuator port 4, nonreturn valve core
9 right-hand member coordinates to control the company of the 4th work oil duct 13 and unidirectional valve pocket 6 by the first spring 8 with the rear end of unidirectional valve pocket 6
On-off is opened, and commutation valve pocket 7 is equipped with second spring 16 and reversing valve core 17 by left-to-right, and commutation valve pocket 7 passes through respectively the 5th
Work oil duct 14, backflow oil duct 15 are connected with the 3rd work oil duct 12, oil return opening 5, and commutation valve pocket 7 right-hand member passes through the 6th working oil
Road 18 is connected with the second work oil duct 11, and the middle part of reversing valve core 17 is provided with annular oil groove 19, and the annular oil groove 19 is in reversal valve
The regulation of oil circuit openings of sizes or oil circuit between the 5th work oil duct 14 and backflow oil duct 15 are can control in the moving process of core 17
Disconnect；Sealing on 3rd actuator port 4 is equipped with accumulator 20；It is provided with for steady 4th work on second work oil duct 11
The adjustable damping 21 of the oil-feed side oil pressure of oil duct 13.
Also include the adjusting screw rod 22 for adjusting the pre compressed magnitude of second spring 16, one end of the adjusting screw rod 22 penetrates
Valve body 1 is simultaneously connected with the left end of second spring 16.
When the present invention is applied to balanced valve, its first actuator port 2 is connected with the control mouth of balanced valve, and adjustable damping 21 is first
First can effectively reduce the fluctuation of balanced valve control mouth pressure, meanwhile, when there is fluctuation within a narrow range in balanced valve control mouth pressure,
Accumulator 20 further can will reduce the fluctuation at balanced valve control mouth by absorption pressure oil in time, when balanced valve control mouth
When fluctuating widely occurs in Stress control mouth pressure, reversing valve core 17 can connect the 5th work oil duct 14 with backflow oil duct 15,
The outer row of partial pressure oil is reduced fluctuating with further.Therefore, this valve block can effectively absorb the pressure at balanced valve control mouth
Fluctuation, and then the impact in balanced valve control loop and jitter phenomenon can be eliminated, the flat of balanced valve control can be effectively improved
Stability.
Check valve 23 is made up of unidirectional valve pocket 6, the first spring 8 and nonreturn valve core 9 in Fig. 3, and Hydraulically-controproportional proportional valve 24 is
It is made up of commutation valve pocket 7, second spring 16, reversing valve core 17 and adjusting screw rod 22.
Fig. 4 is to invent the hydraulic schematic diagram being engaged with balanced valve and hydraulic cylinder, wherein the rod chamber of hydraulic cylinder 26 with
The second actuator port 3 in the present invention is connected, and its rodless cavity is connected with the downstream working hole of balanced valve 25, the control of balanced valve 25
Mouth is connected with first actuator port 2 of the present invention.Concrete operating principle is as follows：Hydraulic cylinder 26（As the executive component of system, horse
Up to also may be used）When stretching out, the pressure oil of system is entered from the early-stage work mouth of balanced valve 25, and Jing one-way functions position enters hydraulic cylinder 26
Rodless cavity, the fluid of the rod chamber of hydraulic cylinder 26 discharges via the second actuator port 3 of this control valve block.
When hydraulic cylinder 26 is retracted, pressure oil enters the rod chamber of hydraulic cylinder 26 from the second actuator port 3 of this control valve block.
Meanwhile, a part of pressure oil Jing adjustable dampings 21 act on the control mouth of balanced valve 25, and then control balanced valve 25 is operated in the right side
Position；Another part pressure oil enters accumulator 20 through check valve 23, and this partial pressure oil can also reach Hydraulically-controproportional proportional valve 24
Oil-in.When pressure is less, Hydraulically-controproportional proportional valve 24 is operated in left position, and its oil-in is not connected with oil return opening.Now, only rely on
Accumulator 20 can absorption pressure fluctuation.When pressure exceedes certain value, the control mouth of Hydraulically-controproportional proportional valve 24（Second working oil
The fluid that mouth 3 is entered act on the right-hand member of reversing valve core 17 by the 6th work oil duct 18）The pressure oil at place is raised, and then makes liquid
The pressure that control proportioning valve 24 is operated at right position, and the second actuator port 3 is bigger, the oil-in and oil return opening of Hydraulically-controproportional proportional valve 24
Between oil circuit opening it is bigger.The size of this pressure value is set by the second spring 16 in the left side of Hydraulically-controproportional proportional valve 24.System pressure
That is pressure oscillation is bigger at the second actuator port 3, and the opening between the oil-in and oil return opening of Hydraulically-controproportional proportional valve 24 is bigger, by liquid
The oil that the oil return opening of control proportioning valve 24 leaks into fuel tank is also more, therefore cutting to the pressure oscillation peak value at the first actuator port 2
Subtract effect more obvious.Pressure size determines the early-stage work hydraulic fluid port and downstream working hole of balanced valve 25 at first actuator port 2
Between oil circuit openings of sizes.So, the fluid of the rodless cavity of hydraulic cylinder 26 is discharged by balanced valve 25, realizes hydraulic cylinder
The retraction of 26 piston rod.During hydraulic cylinder 26 is carried and declined in band, if the weight decrease speed mistake in the presence of load
Hurry up, during the speed determined more than the oil inlet quantity of the rod chamber into hydraulic cylinder 26, the pressure drop at the second actuator port 3 will be made
It is low.The reduction of pressure at second actuator port 3 necessarily causes the reduction of pressure at the first actuator port 2.At the same time, balanced valve
25 valve element in the presence of the spring of left side reduces the amount of opening of oil circuit between early-stage work hydraulic fluid port and downstream working hole, makes liquid
The resistance of the oil return circuit of cylinder pressure 26 increases, so as to prevent the rising of the speed of hydraulic cylinder 26.Thus the present invention can be effectively ensured
The smooth motion of hydraulic cylinder 26, can effectively improve the stability of actuator in hydraulic system.
Claims (2)
1. a kind of control valve block for balanced valve, including valve body (1), the valve body (1) be provided with the first actuator port (2),
Second actuator port (3), the 3rd actuator port (4) and oil return opening (5), it is characterised in that be provided with check valve in the valve body (1)
Chamber (6), commutation valve pocket (7), inside the unidirectional valve pocket (6) the first spring (8) and nonreturn valve core (9) are equipped with from front to back,
First actuator port (2), the second actuator port (3) are respectively by the first work oil duct (10), the second work oil duct (11) connection
Afterwards again work oil duct of Jing the 4th (13) is connected with the rear end of unidirectional valve pocket (6), and the front end of unidirectional valve pocket (6) passes through the 3rd working oil
Road (12) is connected with the 3rd actuator port (4), and the right-hand member of nonreturn valve core (9) is by after the first spring (8) and unidirectional valve pocket (6)
End coordinates to control the connection or disconnection of the 4th work oil duct (13) and unidirectional valve pocket (6), and commutation valve pocket (7) is by left-to-right assembling
There are second spring (16) and reversing valve core (17), commutation valve pocket (7) is respectively by the 5th work oil duct (14), backflow oil duct (15)
Connect with the 3rd work oil duct (12), oil return opening (5), commutation valve pocket (7) right-hand member is by the 6th work oil duct (18) and the second work
Make oil duct (11) connection, annular oil groove (19) is provided with the middle part of reversing valve core (17), the annular oil groove (19) is in reversing valve core
(17) regulation of oil circuit openings of sizes or oil between the 5th work oil duct (14) and backflow oil duct (15) are can control in moving process
The disconnection on road；Sealing on 3rd actuator port (4) is equipped with accumulator (20)；It is provided with for putting down in second work oil duct (11)
The adjustable damping (21) of steady 4th work oil duct (13) oil-feed side oil pressure.
2. a kind of control valve block for balanced valve according to claim 1, it is characterised in that also include for adjusting the
The adjusting screw rod (22) of two springs (16) pre compressed magnitude, one end of the adjusting screw rod (22) penetrate valve body (1) and with the second bullet
The left end connection of spring (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510740878.3A CN105387012B (en) | 2015-11-04 | 2015-11-04 | Control valve block for balance valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510740878.3A CN105387012B (en) | 2015-11-04 | 2015-11-04 | Control valve block for balance valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105387012A CN105387012A (en) | 2016-03-09 |
| CN105387012B true CN105387012B (en) | 2017-05-03 |
Family
ID=55419640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510740878.3A Active CN105387012B (en) | 2015-11-04 | 2015-11-04 | Control valve block for balance valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105387012B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107489787B (en) * | 2017-08-15 | 2018-11-09 | 徐州工业职业技术学院 | A kind of revolving valve, revolution hydraulic pressure reversing control system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4215844A (en) * | 1978-08-28 | 1980-08-05 | The Babcock & Wilcox Company | Valve actuator system |
| DE3619162A1 (en) * | 1985-12-24 | 1987-06-25 | Stahl Aufzuege Gmbh & Co Kg | Manipulator |
| JP4884752B2 (en) * | 2005-11-21 | 2012-02-29 | 三菱重工業株式会社 | Deck crane hydraulic drive |
| CN102518610A (en) * | 2011-12-15 | 2012-06-27 | 常德中联重科液压有限公司 | Motor control loop and control valve |
| CN203048520U (en) * | 2012-11-04 | 2013-07-10 | 西安志越机电科技有限公司 | Hydraulic circuit of working arm retractor device of overhead working truck |
| CN104444866A (en) * | 2014-11-25 | 2015-03-25 | 中联重科股份有限公司 | Control system of telescoping mechanism and crane with same |
-
2015
- 2015-11-04 CN CN201510740878.3A patent/CN105387012B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4215844A (en) * | 1978-08-28 | 1980-08-05 | The Babcock & Wilcox Company | Valve actuator system |
| DE3619162A1 (en) * | 1985-12-24 | 1987-06-25 | Stahl Aufzuege Gmbh & Co Kg | Manipulator |
| JP4884752B2 (en) * | 2005-11-21 | 2012-02-29 | 三菱重工業株式会社 | Deck crane hydraulic drive |
| CN102518610A (en) * | 2011-12-15 | 2012-06-27 | 常德中联重科液压有限公司 | Motor control loop and control valve |
| CN203048520U (en) * | 2012-11-04 | 2013-07-10 | 西安志越机电科技有限公司 | Hydraulic circuit of working arm retractor device of overhead working truck |
| CN104444866A (en) * | 2014-11-25 | 2015-03-25 | 中联重科股份有限公司 | Control system of telescoping mechanism and crane with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105387012A (en) | 2016-03-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105909583B (en) | Buffer relief valve and hydraulic system | |
| CN100441885C (en) | Hydraulic balance valve capable of automatically adapting load change | |
| CN207131916U (en) | A kind of load-sensitive proportional multi-way valve pilot control stabilizing hydraulic pressure damper | |
| CN113074155A (en) | Negative pressure opening plug-in mounting type oil replenishing valve | |
| CN111425483B (en) | Oil cylinder tail end buffering device | |
| CN204096970U (en) | A kind of luffing range of cantilever support hydraulic efficiency pressure system of hoisting crane and hoisting crane | |
| CN105387012B (en) | Control valve block for balance valve | |
| CN103174691A (en) | Anti-fluctuation of load rotary buffer control circuit used for rotary hydraulic system | |
| CN204164067U (en) | A kind of equilibrium valve | |
| CN102927074B (en) | Anti-cavitation high frequency sound big flow proportional inserted valve | |
| CN203835843U (en) | Balance valve set, hydraulic control loop and engineering machine | |
| CN105465077A (en) | Hydraulic system of gear and rack lifting device | |
| CN106051185B (en) | A kind of balanced valve built in pooling feature | |
| CN201125893Y (en) | Bidirectional balanced valve | |
| CN110285104B (en) | Fixed-difference overflow valve and engineering machinery | |
| CN207634672U (en) | Gearbox pressure regulation valve arrangement and automatic gear-box | |
| CN205117867U (en) | Whole multiple unit valve is with controlling balanced valve outward | |
| CN106122144B (en) | The pilot-actuated valve to operate steadily | |
| CN106151143B (en) | Luffing jib maintaining valve | |
| CN201799897U (en) | Hydraulic pump station capable of loosening broach | |
| CN105041786B (en) | A kind of hydraulic exciting device based on hydraulic transformer, accumulator variation rigidity mechanism | |
| CN204664029U (en) | A kind of hydraulic balance system with emergency loop | |
| CN208918940U (en) | A kind of punching press machine hydraulic system | |
| CN201827434U (en) | Inclined reversing valve of forklift | |
| CN205078530U (en) | A hydraulic pressure oil circuit that is used for flat board to turn over mould machine safe being equipped with pressing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171123 Address after: 221000 Copper Mt. City, Jiangsu province Mao Village Patentee after: Xuzhou Cheung Kay heavy Technology Co. Ltd Address before: 221140 Jiangsu Province, Gulou District of Xuzhou City Xiang Wang Road No. 1 Patentee before: Xuzhou Institute of Industry Technology |
|
| TR01 | Transfer of patent right |