CN110285106A - A kind of multi-way valve, its oscillating oil cylinder low-speed motion control system and high-altitude operation vehicle - Google Patents
A kind of multi-way valve, its oscillating oil cylinder low-speed motion control system and high-altitude operation vehicle Download PDFInfo
- Publication number
- CN110285106A CN110285106A CN201910660061.3A CN201910660061A CN110285106A CN 110285106 A CN110285106 A CN 110285106A CN 201910660061 A CN201910660061 A CN 201910660061A CN 110285106 A CN110285106 A CN 110285106A
- Authority
- CN
- China
- Prior art keywords
- valve
- electromagnetic switch
- oil
- oil cylinder
- meter out
- 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.)
- Granted
Links
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 21
- 239000012530 fluid Substances 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 description 120
- 238000000034 method Methods 0.000 description 4
- 239000010727 cylinder oil Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
Abstract
The present invention discloses a kind of multi-way valve, including electrical proportional speed governing valve, main overflow valve, the first electromagnetic switch reversal valve and the second electromagnetic switch reversal valve；The electrical proportional speed governing valve is located between the oil inlet of electromagnetic switch reversal valve and multi-way valve oil inlet, and bypasses multi-way valve oil return opening；The first electromagnetic switch reversal valve and the second electromagnetic switch reversal valve are in parallel, and public oil inlet is communicated with the outlet of electrical proportional speed governing valve, and public oil return opening is communicated with multi-way valve oil return opening；The main overflow valve is located between multi-way valve oil inlet and multi-way valve oil return opening.The present invention closes control working bucket by the unidirectional meter out valve group being arranged on multi-way valve oscillating oil cylinder simply connected bidirectional relief valve and working oil path and swings revolving speed and direction, realize the small stability of flow control of oscillating oil cylinder, to realize the control of working bucket oscillating oil cylinder swing speed low-speed motion, bidirectional relief valve only limits multi-way valve oscillating oil cylinder simply connected operating pressure, does not influence the operating pressure of other work connection.
Description
Technical field
The present invention relates to a kind of multi-way valve, its oscillating oil cylinder low-speed motion control system and high-altitude operation vehicles, belong to hydraulic
Technical field.
Background technique
High-altitude operation vehicle lifts apparatus for work as typical working bucket, needs working bucket oscillating oil cylinder being capable of low-speed stable
It swings.And how to realize that the low-speed stable control of working bucket oscillating oil cylinder, speed is adjustable while being realized with a low cost fast speed sound
It answers, is those skilled in the art's problem to be solved.
Currently, typical working bucket oscillating oil cylinder low-speed stable is swung, mainly lead to the working oil in working bucket oscillating oil cylinder
To realize, generally use diameter is road setting throttle orificeExtremelyThrottle orifice or one-way throttle hole；Another way
As a kind of electro-hydraulic leveling valve group (ZL201721312443.X) of multifunctional working bucket is disclosed, bypass is set on valve group in-line
Proportional throttle valve joins oil inlet flow to adjust work, to realize low speed control.
Above-mentioned first way need to be arranged on work in-line and work oil return line with two throttle orifices, meeting in this way
Because of working oil path meter in, cause oscillating oil cylinder oil liquid work connection in-line oil liquid pressurising speed slow, so as to cause oil is swung
It is longer that cylinder executes the motor imagination time；The required precision of second way comparative example throttle valve is high, so as to cause throttle element
Cost and relevant electrical control higher cost.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides a kind of multi-way valves, its oscillating oil cylinder low-speed motion control
System processed and high-altitude operation vehicle realize the low-speed stable control and speed adjustable function of oscillating oil cylinder.
To achieve the goals above, a kind of multi-way valve that the present invention uses, including electrical proportional speed governing valve, main overflow valve,
First electromagnetic switch reversal valve and the second electromagnetic switch reversal valve；
The electrical proportional speed governing valve is located between the oil inlet of electromagnetic switch reversal valve and multi-way valve oil inlet, and is bypassed
Multi-way valve oil return opening；
The first electromagnetic switch reversal valve and the second electromagnetic switch reversal valve are in parallel, public oil inlet and electrical proportional
The outlet of speed governing valve communicates, and public oil return opening is communicated with multi-way valve oil return opening；
The main overflow valve is located between multi-way valve oil inlet and multi-way valve oil return opening.
As an improvement, the electrical proportional speed governing valve uses two-bit triplet electrical proportional speed governing valve.
As an improvement, the first electromagnetic switch reversal valve is 3-position 4-way electromagnetic switch reversal valve.
In addition, the present invention also provides a kind of oscillating oil cylinder low-speed motion control system, including it is described in any of the above embodiments
Multi-way valve, bidirectional relief valve, the first unidirectional meter out valve, the second unidirectional meter out valve, balanced valve and oscillating oil cylinder；
The balanced valve is set between the first unidirectional meter out valve, the second unidirectional meter out valve and oscillating oil cylinder；
The left-handed hydraulic fluid port of the oscillating oil cylinder is connected through balanced valve with the first unidirectional meter out valve, the dextrorotation of oscillating oil cylinder
Hydraulic fluid port is connected through balanced valve with the second unidirectional meter out valve；
The oil inlet of the first unidirectional meter out valve, the second unidirectional meter out valve oil inlet with multi-way valve
First electromagnetic switch reversal valve is connected；
The bidirectional relief valve be set to the first unidirectional meter out valve and the second unidirectional meter out valve respectively with multi-way valve
Between two connected working oil paths.
As an improvement, the oil inlet of the first electromagnetic switch reversal valve is connected with the outlet of electrical proportional speed governing valve, the first electricity
The first actuator port of magnetic switch reversal valve is connected with the oil inlet of the first unidirectional meter out valve, the first electromagnetic switch reversal valve
Two actuator ports are connected with the second unidirectional meter out valve oil inlet, and the oil return opening and multi-way valve of the first electromagnetic switch reversal valve return
Hydraulic fluid port is connected.
As an improvement, the first unidirectional meter out valve and the second unidirectional meter out valve are oil inlet all-pass oil return section
The throttle valve of stream.
As an improvement, the bidirectional relief valve includes the first overflow valve, the second overflow valve；
The oil inlet of first overflow valve is bypassed in first the first actuator port of electromagnetic switch reversal valve, the second overflow valve
Oil inlet bypass in first the second actuator port of electromagnetic switch reversal valve.
As an improvement, the balanced valve is Bidirectional balanced valve.
Finally, it is low that the high-altitude operation vehicle is equipped with the oscillating oil cylinder the present invention also provides a kind of high-altitude operation vehicle
Fast kinetic control system.
Compared with prior art, the beneficial effects of the present invention are:
1) present invention passes through the unidirectional oil return section being arranged in multi-way valve oscillating oil cylinder simply connected bidirectional relief valve and working oil path
It flows valve group and closes control working bucket swing revolving speed and direction, the small stability of flow control of oscillating oil cylinder is realized, to realize work
The control of bucket oscillating oil cylinder swing speed low-speed motion, bidirectional relief valve only limit multi-way valve oscillating oil cylinder simply connected operating pressure,
The operating pressure of other work connection is not influenced.
2) present invention is matched by bidirectional relief valve pressure set points with oscillating oil cylinder adjustment of load, is realized larger-diameter
Throttle orifice completes smaller flow control.Biggish orifice diameter can improve the contamination resistance of throttle orifice, improve throttle orifice
Obstructing problem caused by the high-temperature oxydation generated by liquid stream high-speed friction.This method is compared to using high-performance proportional throttle valve
Throttle grverning reduces hydraulic system cost.
Detailed description of the invention
Fig. 1 is the hydraulic principle schematic diagram of oscillating oil cylinder low speed oscillations control system of the present invention.
In figure: 1, multi-way valve, 11, electrical proportional speed governing valve, 12, main overflow valve, the 13, first electromagnetic switch reversal valve, 14,
Second electromagnetic switch reversal valve, 2, bidirectional relief valve, the 21, first overflow valve, the 22, second overflow valve, the 3, first unidirectional oil return section
Flow valve, the 4, second unidirectional meter out valve, 5, balanced valve, 6, oscillating oil cylinder；
P, multi-way valve oil inlet, T, multi-way valve oil return opening, A1, first the first actuator port of electromagnetic switch reversal valve, B1,
One the second actuator port of electromagnetic switch reversal valve, A2, second the first actuator port of electromagnetic switch reversal valve, B2, the second electromagnetism are opened
Close the second actuator port of reversal valve.
Specific embodiment
In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention is carried out below further detailed
It describes in detail bright.However, it should be understood that the specific embodiments described herein are merely illustrative of the present invention, it is not limited to this hair
Bright range.
Unless otherwise defined, all technical terms and scientific terms used herein are led with technology of the invention is belonged to
The normally understood meaning of the technical staff in domain is identical, and term as used herein in the specification of the present invention is intended merely to retouch
State the purpose of specific embodiment, it is not intended that in the limitation present invention.
As shown in Figure 1, a kind of multi-way valve, including the commutation of electrical proportional speed governing valve 11, main overflow valve 12, the first electromagnetic switch
Valve 13 and the second electromagnetic switch reversal valve 14；
The electrical proportional speed governing valve 11 uses two-bit triplet electrical proportional speed governing valve, and electrical proportional speed governing valve 11 is located at the
One, between oil inlet and the multi-way valve oil inlet P in parallel of two electromagnetic switch reversal valves, and multi-way valve oil return inlet T is bypassed；Described
One electromagnetic switch reversal valve 13 and the second electromagnetic switch reversal valve 14 are in parallel, public oil inlet and electrical proportional speed governing valve 11
Outlet communicates, and public oil return opening is communicated with multi-way valve oil return inlet T；Multi-way valve oil inlet is located at using electrical proportional speed governing valve 11
P and the first electromagnetic switch reversal valve 13, the second electromagnetic switch reversal valve 14 public oil inlet between, it is main to complete the first electromagnetism
Switch the flow control of the public oil inlet of reversal valve 13 and the second electromagnetic switch reversal valve 14；
The main overflow valve 12 is located between multi-way valve oil inlet P and multi-way valve oil return inlet T, is used for overload protection, limitation
The maximum working pressure of multi-way valve.
In addition, the present invention also provides a kind of oscillating oil cylinder low-speed motion control system, including the multi-way valve 1, double
To overflow valve 2, the first unidirectional meter out valve 3, the second unidirectional meter out valve 4, balanced valve 5 and oscillating oil cylinder 6；
The balanced valve 5 is Bidirectional balanced valve, is set to the first unidirectional meter out valve 3, the second unidirectional 4 and of meter out valve
Between oscillating oil cylinder 6；
The left-handed hydraulic fluid port of the oscillating oil cylinder 6 is connected through balanced valve 5 with the oil return opening of the first unidirectional meter out valve 3, pendulum
The dextrorotation hydraulic fluid port of dynamic oil cylinder 6 is connected through balanced valve 5 with the oil return opening of the second unidirectional meter out valve 4；
The oil inlet of the first unidirectional meter out valve 3 and the first electromagnetic switch reversal valve first of multi-way valve 1 work
Hydraulic fluid port A1 is connected, the oil inlet of the second unidirectional meter out valve 4 and first the second working oil of electromagnetic switch reversal valve of multi-way valve 1
Mouth B1 is connected；
The bidirectional relief valve 2 be set to the first unidirectional meter out valve 3 and the second unidirectional meter out valve 4 respectively with multichannel
Between two connected working oil paths of valve 1.
As the improvement of embodiment, the first electromagnetic switch reversal valve 13 is 3-position 4-way electromagnetic switch reversal valve,
Effect is to realize the direction of motion control of oscillating oil cylinder 6, and oil inlet is connected with the outlet of electrical proportional speed governing valve 11；
First electromagnetic switch reversal valve the first actuator port A1 is connected with the oil inlet of the first unidirectional meter out valve 3, the
One electromagnetic switch reversal valve second work B1 is connected with the oil inlet of the second unidirectional meter out valve 4, the commutation of the first electromagnetic switch
13 oil return opening of valve is connected with multi-way valve oil return inlet T.
The first unidirectional meter out valve 3 and the second unidirectional meter out valve 4 are the throttling of oil inlet all-pass meter out
Valve, effect are that the oil return of oscillating oil cylinder 6 is made to form restriction and back pressure, improve the small flow fine motion stability of oscillating oil cylinder.
First unidirectional 3 oil outlet of meter out valve is connected with balanced valve 5, the second unidirectional 4 oil outlet of meter out valve and 5 phase of balanced valve
Even.
The bidirectional relief valve 2 includes the first overflow valve 21, the second overflow valve 22.Wherein by 21 oil inlet of the first overflow valve
Pass through first electromagnetic switch reversal valve the first actuator port A1, limitation first electromagnetic switch reversal valve the first actuator port A1 work
Pressure, the second overflow valve 22 bypass limit the commutation of the first electromagnetic switch in first electromagnetic switch reversal valve the second actuator port B1
Valve the second actuator port B1 operating pressure.
Meter out mouth that the present invention is formed by the first unidirectional meter out valve 3 and the second unidirectional meter out valve 4 and
The bidirectional relief valve proportional pressure control of oscillating oil cylinder working oil path bypass arrangement is arranged, and is able to achieve working bucket oscillating oil cylinder rotation speed
Stablize adjustable.
Lower bidirectional relief valve pressure limiting setting can make the matching first unidirectional meter out valve 3 and the second unidirectional oil return
The throttle orifice of throttle valve 4 chooses biggish diameterOscillating oil cylinder has the stabilized (steady-state) speed of very little simultaneously.This method improves
Throttle orifice antipollution, anti-oxidant obstruction cutout ability, improve the reliability of system.This method is compared to using high property
Energy proportional throttle valve throttle grverning, reduces hydraulic system cost, its working principles are as follows:
When electrical proportional speed governing valve 11 receive amplifier signal open when, the first electromagnetic switch reversal valve 13 receive controller
When signal is in the next, partial pressure oil flows through electrical proportional speed governing valve 11, the first electromagnetic switch from multi-way valve oil inlet P
The first actuator port of reversal valve A1, the first unidirectional meter out valve 3 then flow through balanced valve 5 and flow into the promotion swing of oscillating oil cylinder 6
Oil cylinder is left-handed.The oil return that oscillating oil cylinder 6 is pushed out flows through balanced valve 5, the second unidirectional meter out valve 4, the first electromagnetic switch and changes
To the second actuator port of valve B1, electromagnetic switch reversal valve 13 to multi-way valve oil return inlet T, oscillating oil cylinder completes left-handed movement.It is another
Partial pressure oil stream is closed through 21 to the first electromagnetic switch reversal valve the second actuator port B1 of the first overflow valve and oscillating oil cylinder oil return
Flow back into multi-way valve oil return inlet T；
The uninterrupted for flowing through the second unidirectional meter out valve 4 subtracts oscillating oil cylinder by the setting pressure of the first overflow valve 21
The throttling diameter of residual compression and the second unidirectional meter out valve 4 after 65 pressure loss of workload and balanced valve is total
With decision.
When electrical proportional speed governing valve 11 receive amplifier signal open when, the first electromagnetic switch reversal valve 13 receive controller
When signal is in upper, partial pressure oil is from multichannel valve group oil inlet P flows through electrical proportional speed governing valve 11, the first electromagnetism is opened
The second actuator port of reversal valve B1, the second unidirectional meter out valve 4 are closed, balanced valve 5 is then flowed through and flows into the promotion pendulum of oscillating oil cylinder 6
Dynamic oil cylinder dextrorotation.The oil return that oscillating oil cylinder 6 is pushed out flows through balanced valve 5, the first unidirectional meter out valve 3, the first electromagnetic switch
The first actuator port of reversal valve A1, the first electromagnetic switch reversal valve 13 to multi-way valve oil return inlet T, it is dynamic that oscillating oil cylinder completes dextrorotation
Make.Another part pressure oil flows through 22 to the first electromagnetic switch reversal valve the first actuator port A1 of the second overflow valve and oscillating oil cylinder
Oil return interflow is back to multi-way valve oil return inlet T；
The uninterrupted for flowing through the first unidirectional meter out valve 3 subtracts oscillating oil cylinder by the setting pressure of the second overflow valve 22
The throttling diameter of residual compression and the first unidirectional meter out valve 3 after 5 pressure loss of 6 workloads and balanced valve is common
It determines.
Lower adjustable overflow set pressure and biggish meter out diametric fit realize that oscillating oil cylinder stablizes rotation, and
The setting of speeds comparable example.
The operating pressure of second electromagnetic switch reversal valve 14 is limited by main overflow valve 12, is not influenced by bidirectional relief valve 2.
Finally, being equipped with the oscillating oil cylinder low-speed motion control system the present invention also provides a kind of high-altitude operation vehicle.
The meter out mouth and pendulum that the present invention is formed by the first unidirectional meter out valve and the second unidirectional meter out valve
It is steady that the bidirectional relief valve proportional pressure control setting of dynamic cylinder efficient oil circuit bypass arrangement is able to achieve working bucket oscillating oil cylinder rotation speed
It is fixed adjustable.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modification, equivalent replacement or improvement etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (9)
1. a kind of multi-way valve, which is characterized in that including electrical proportional speed governing valve (11), main overflow valve (12), the first electromagnetic switch
Reversal valve (13) and the second electromagnetic switch reversal valve (14)；
The electrical proportional speed governing valve (11) is located between the oil inlet of electromagnetic switch reversal valve and multi-way valve oil inlet (P), and
It bypasses multi-way valve oil return opening (T)；
The first electromagnetic switch reversal valve (13) and the second electromagnetic switch reversal valve (14) are in parallel, public oil inlet and electronics
The outlet of proportional velocity regulating valve (11) communicates, and public oil return opening is communicated with multi-way valve oil return opening (T)；
The main overflow valve (12) is located between multi-way valve oil inlet (P) and multi-way valve oil return opening (T).
2. a kind of multi-way valve according to claim 1, which is characterized in that the electrical proportional speed governing valve (11) uses two
Threeway electrical proportional speed governing valve.
3. a kind of multi-way valve according to claim 1, which is characterized in that the first electromagnetic switch reversal valve (13) is three
Position four-way electromagnetic switchs reversal valve.
4. a kind of oscillating oil cylinder low-speed motion control system, which is characterized in that including the described in any item multichannels of claim 1-3
Valve (1), bidirectional relief valve (2), the first unidirectional meter out valve (3), the second unidirectional meter out valve (4), balanced valve (5) and pendulum
Dynamic oil cylinder (6)；
The balanced valve (5) is set to the first unidirectional meter out valve (3), the second unidirectional meter out valve (4) and oscillating oil cylinder (6)
Between；
The left-handed hydraulic fluid port of the oscillating oil cylinder (6) is connected through balanced valve (5) with the first unidirectional meter out valve (3), oscillating oil cylinder
(6) dextrorotation hydraulic fluid port is connected through balanced valve (5) with the second unidirectional meter out valve (4)；
The oil inlet of the first unidirectional meter out valve (3), the second unidirectional meter out valve (4) oil inlet and multi-way valve
(1) the first electromagnetic switch reversal valve (13) is connected；
The bidirectional relief valve (2) be set to the first unidirectional meter out valve (3) and the second unidirectional meter out valve (4) respectively with it is more
Between two connected working oil paths of road valve (1).
5. a kind of oscillating oil cylinder low-speed motion control system according to claim 4, which is characterized in that the first electromagnetic switch
The oil inlet of reversal valve (13) is connected with the outlet of electrical proportional speed governing valve (11), first the first working oil of electromagnetic switch reversal valve
Mouth (A1) is connected with the oil inlet of the first unidirectional meter out valve (3), first the second actuator port of electromagnetic switch reversal valve (B1)
It is connected with the second unidirectional meter out valve (4) oil inlet, the oil return opening of the first electromagnetic switch reversal valve (13) and multi-way valve oil return
Mouth (T) is connected.
6. a kind of oscillating oil cylinder low-speed motion control system according to claim 4, which is characterized in that described first is unidirectional
Meter out valve (3) and the second unidirectional meter out valve (4) are the throttle valve of oil inlet all-pass meter out.
7. a kind of oscillating oil cylinder low-speed motion control system according to claim 4, which is characterized in that the bidirectional flooding
Valve (2) includes the first overflow valve (21), the second overflow valve (22)；
The oil inlet bypass of first overflow valve (21) is overflow in first the first actuator port of electromagnetic switch reversal valve (A1), second
The oil inlet for flowing valve (22) is bypassed in first the second actuator port of electromagnetic switch reversal valve (B1).
8. a kind of oscillating oil cylinder low-speed motion control system according to claim 4, which is characterized in that the balanced valve
It (5) is Bidirectional balanced valve.
9. a kind of high-altitude operation vehicle, which is characterized in that the high-altitude operation vehicle is equipped with any one of claim 4-8 swing
Oil cylinder low-speed motion control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910660061.3A CN110285106B (en) | 2019-07-22 | 2019-07-22 | Multi-way valve, swing oil cylinder low-speed motion control system thereof and overhead working truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910660061.3A CN110285106B (en) | 2019-07-22 | 2019-07-22 | Multi-way valve, swing oil cylinder low-speed motion control system thereof and overhead working truck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110285106A true CN110285106A (en) | 2019-09-27 |
| CN110285106B CN110285106B (en) | 2024-02-13 |
Family
ID=68023560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910660061.3A Active CN110285106B (en) | 2019-07-22 | 2019-07-22 | Multi-way valve, swing oil cylinder low-speed motion control system thereof and overhead working truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110285106B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120224983A1 (en) * | 2009-11-10 | 2012-09-06 | Xiaogang Yi | Multi-way valve, hydraulic device and concrete pump vehicle |
| CN104379846A (en) * | 2012-05-29 | 2015-02-25 | 现代重工业株式会社 | Pressure-control-type independent flow control hydraulic system for excavator |
| CN204251287U (en) * | 2014-11-17 | 2015-04-08 | 宁波海宏液压有限公司 | Electri forklift control cock group |
| CN106122157A (en) * | 2016-08-31 | 2016-11-16 | 徐州徐工随车起重机有限公司 | A kind of hydraulic control system of the high-altitude operation vehicle of ratio throttle grverning |
| CN107605843A (en) * | 2017-10-12 | 2018-01-19 | 徐州徐工随车起重机有限公司 | A kind of electro-hydraulic leveling valve group of multifunctional working bucket |
| CN210423204U (en) * | 2019-07-22 | 2020-04-28 | 徐州徐工随车起重机有限公司 | Multi-way valve, swing oil cylinder low-speed motion control system thereof and aerial work vehicle |
-
2019
- 2019-07-22 CN CN201910660061.3A patent/CN110285106B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120224983A1 (en) * | 2009-11-10 | 2012-09-06 | Xiaogang Yi | Multi-way valve, hydraulic device and concrete pump vehicle |
| CN104379846A (en) * | 2012-05-29 | 2015-02-25 | 现代重工业株式会社 | Pressure-control-type independent flow control hydraulic system for excavator |
| CN204251287U (en) * | 2014-11-17 | 2015-04-08 | 宁波海宏液压有限公司 | Electri forklift control cock group |
| CN106122157A (en) * | 2016-08-31 | 2016-11-16 | 徐州徐工随车起重机有限公司 | A kind of hydraulic control system of the high-altitude operation vehicle of ratio throttle grverning |
| CN107605843A (en) * | 2017-10-12 | 2018-01-19 | 徐州徐工随车起重机有限公司 | A kind of electro-hydraulic leveling valve group of multifunctional working bucket |
| CN210423204U (en) * | 2019-07-22 | 2020-04-28 | 徐州徐工随车起重机有限公司 | Multi-way valve, swing oil cylinder low-speed motion control system thereof and aerial work vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110285106B (en) | 2024-02-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105221506B (en) | A kind of load-sensitive valve and load-sensitive hydraulic system | |
| US6604938B1 (en) | Device for gas burners | |
| WO2012019498A1 (en) | Hydraulic control circuit and method | |
| CN210623231U (en) | Hydraulic pressure slewer buffer system | |
| WO2014110901A1 (en) | Hydraulic apparatus based on confluence control mode | |
| CN110285106A (en) | A kind of multi-way valve, its oscillating oil cylinder low-speed motion control system and high-altitude operation vehicle | |
| CN107288947A (en) | A kind of manual proportional reversing valve | |
| ATE514125T1 (en) | THROTTLE VALVE DEVICE | |
| CN104179743B (en) | Modular load sensitivity electric-hydraulic proportion banked direction control valves | |
| CN109139579A (en) | A kind of hydraulic control system and its control method of full-rotating rudder paddle | |
| CN106168234B (en) | A kind of constant displacement pump variable delivery hydraulic system | |
| CN205918570U (en) | Axial plunger pump device of high accuracy electric proportional control | |
| CN210423204U (en) | Multi-way valve, swing oil cylinder low-speed motion control system thereof and aerial work vehicle | |
| CN207093482U (en) | Ioad-sensing control valve and load sensitive control system | |
| CN110185670A (en) | Construction machinery hydraulic system flow allocation method | |
| CN113818835B (en) | Reflux inflow control valve | |
| CN205654634U (en) | Pressure flow adjustable stack valve | |
| CN205349896U (en) | A hydraulic motor control valve for on hydraulic system return circuit | |
| CN109578352A (en) | Load sensitive system and aerial work platform | |
| CN100374735C (en) | Sleigh mounted electrohydraulic ratio regulating system | |
| CN208295191U (en) | A kind of stacking type hydraulic control reversal valve | |
| CN2727469Y (en) | Load feedback pressure adaptation multiway valve | |
| CN207145359U (en) | A kind of manual proportional reversing valve | |
| CN106151142B (en) | The independent spool control valve and its control method of flow proportional assignment | |
| CN104895856B (en) | A kind of winch big flow valve group and hydraulic system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |