CN105822615B - The hydraulic control system of engineering machinery jib lubbing mechanism - Google Patents
The hydraulic control system of engineering machinery jib lubbing mechanism Download PDFInfo
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- CN105822615B CN105822615B CN201610275232.7A CN201610275232A CN105822615B CN 105822615 B CN105822615 B CN 105822615B CN 201610275232 A CN201610275232 A CN 201610275232A CN 105822615 B CN105822615 B CN 105822615B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/007—Overload
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
Abstract
A kind of hydraulic control system of engineering machinery jib lubbing mechanism, including the hydraulic oil pump connected with hydraulic oil container；The first reversal valve and the second reversal valve connected with hydraulic oil pump；The first Double throttle check valve connected with the first reversal valve；The first hydraulic control one-way valve and the second hydraulic control one-way valve that control port is connected with the first Double throttle check valve respectively；The second Double throttle check valve connected with the second reversal valve；The Bidirectional balanced valve connected with the second Double throttle check valve, the first hydraulic control one-way valve and the second hydraulic control one-way valve；The hydraulic jack connected with the first hydraulic control one-way valve and the second hydraulic control one-way valve；First throttle stop valve, the first overflow valve, the second throttling stop valve, the second overflow valve, the first check valve and the second check valve connected with hydraulic jack；Oil-out is connected with the rodless cavity and rod chamber of hydraulic jack, the 3rd check valve and the 4th check valve that oil inlet is connected with the oil-out of first throttle stop valve, the second throttling stop valve, the first overflow valve and the second overflow valve.
Description
Technical field
The present invention relates to the technical field of hydraulic of engineering machinery, more particularly, to a kind of engineering machinery jib lubbing mechanism
Hydraulic control system.
Background technology
Engineering machinery jib lubbing mechanism is in equipment operation, and its executing agency's hydraulic cylinder and motor are often in latch like
State, bears load larger.Higher pressure is easily caused hydraulic fluid leak, and external leakage can cause fluid to waste, and pollutes environment, jeopardizes
Personal safety causes fire；Internal leakage can cause systematic function unstable, such as make pressure, flow abnormal, will be made when serious
Into stopping production.Jib lubbing mechanism hydraulic cylinder is because load is big or Gravitative Loads, it may appear that exceed the speed limit out-of-control phenomenon when voluntarily falling or fall.For
Prevent this kind of situation from causing security incident, it is desirable to can not be without the automatic retraction of control, it is necessary to which speed limit is set in hydraulic system
Measure, to adjust the falling speed of workpiece, and sets the locking for ensureing that lowering means can be above locked at an arbitrary position
Hydraulic circuit.
Fig. 1 is speed limit locking circuit theory figure in the prior art using one-way throttle valve, during rising, the left position work of reversal valve
Make, pressure oil flows into hydraulic cylinder rodless cavity, pushing mechanism work through the left position of reversal valve by check valve.The right position work of reversal valve
When making, pressure oil enters rod chamber, because gravity is acted on downwards, mechanism is had hypervelocity downward trend, but due to now without bar
Chamber oil return can only produce choke pressure and acted on balancing gravity through choke valve oil return box.As long as oil return line can produce enough back ofs the body
Pressure, prevents from the generation of gravity hypervelocity phenomenon.
This method for limiting speed is simpler, but decrease speed changes with magnitude of load, and load is big, then decrease speed is fast, conversely,
Then decrease speed is slow, therefore decrease speed is not sufficiently stable.And during stationary deployment, because of reversal valve seepage, it is impossible to ensure for a long time
Locking positioning.It is suitable only for locking and speed limit requires not tight occasion.
Using the influence of the loop weight decrease speed size loaded of one-way throttle valve, and the hydraulic pressure of balanced valve is used to return
Road can overcome the disadvantage, and speed limit is stable.As shown in Figure 2 in the prior art using the speed limit locking circuit theory figure of balanced valve,
When weight declines, certain pressure is set up in hydraulic cylinder oil back chamber, so as to ensure that the stability of decrease speed is not loaded
The influence of change.And because this balanced valve has good sealing, therefore prolonged locking positioning action can be played.
But speed limit locking loop of the prior art does not have anti-pipeline breaking function, in high-pressure hose blast, oil
Cylinder can produce pitching, bring safety problem；The control functions such as braking, speed governing, the commutation of oil cylinder also imperfection.
The content of the invention
In order to overcome the defect of prior art, present invention solves the technical problem that being：There is provided one kind can effectively control to become
Width mechanism is steadily lifted, the hydraulic control of the engineering machinery jib lubbing mechanism with control functions such as braking, speed governing, unpowered resets
System.
In order to solve the above-mentioned technical problem, the present invention provides a kind of hydraulic control system of engineering machinery jib lubbing mechanism, bag
Include the hydraulic oil pump that oil inlet is connected with hydraulic oil container；The first reversal valve that oil inlet is connected with the oil-out of the hydraulic oil pump
With the second reversal valve；The first Double throttle check valve connected with two actuator ports of first reversal valve；Control port is distinguished
The first hydraulic control one-way valve and the second hydraulic control one-way valve connected with first Double throttle check valve；Respectively with the described second commutation
Second Double throttle check valve of the two actuator ports connection of valve；With second Double throttle check valve, the first hydraulic control one-way valve and
The Bidirectional balanced valve of second hydraulic control one-way valve connection；At least one rodless cavity and rod chamber respectively with the first hydraulic control one-way valve and
The hydraulic jack of two hydraulic control one-way valves connection；Oil inlet is connected with the rodless cavity of the hydraulic jack, oil-out and hydraulic oil container
The first throttle stop valve and the first overflow valve of connection；Oil inlet is connected with the rod chamber of the hydraulic jack, oil-out and liquid
Press oil the second throttling stop valve and the second overflow valve of case connection；Oil-out is respectively with the rodless cavity of the hydraulic jack and having bar
Chamber is connected, the first check valve and the second check valve that oil inlet is connected with hydraulic oil container respectively；Oil-out respectively with the hydraulic pressure
The rodless cavity of oil cylinder is connected with rod chamber, oil inlet and first throttle stop valve, the second throttling stop valve, the first overflow valve and the
The 3rd check valve and the 4th check valve of the oil-out connection of two overflow valves.
The hydraulic control system of the engineering machinery jib lubbing mechanism provided as further improved technology scheme, the present invention, also
Including the first explosion-proof valve connected with the Bidirectional balanced valve and the first hydraulic control one-way valve；With the Bidirectional balanced valve and the second liquid
Control the second explosion-proof valve of check valve connection.Explosion-proof valve is provided with system circuit, when high-pressure hose blast, to the nothing of hydraulic jack
The fuel-displaced carry out locking of rod cavity and rod chamber, it is to avoid hydraulic jack produces pitching motion, it is to avoid the generation of security incident.
The hydraulic control system of the engineering machinery jib lubbing mechanism provided as further improved technology scheme, the present invention, also
The 5th check valve connected including oil inlet with the oil-out of the hydraulic oil pump.
The hydraulic control system of the engineering machinery jib lubbing mechanism provided as further improved technology scheme, the present invention, also
The 3rd overflow valve connected including the oil-out with the hydraulic oil pump.
The hydraulic control system of the engineering machinery jib lubbing mechanism provided as further improved technology scheme, the present invention, also
The pressure switch and/or pressure gauge connected including the oil inlet with first reversal valve and the second reversal valve.
The hydraulic control system of the engineering machinery jib lubbing mechanism provided as further improved technology scheme, the present invention, also
The cooler connected including the oil return opening with first reversal valve and the second reversal valve.
The hydraulic control system of the engineering machinery jib lubbing mechanism provided as further improved technology scheme, the present invention, also
Including the filter being arranged on the oil returning tube of first reversal valve and the second reversal valve.
The hydraulic control system of the engineering machinery jib lubbing mechanism provided as further improved technology scheme, the present invention, also
Including the visual liquid level gauge being connected with hydraulic oil container, thermometer checks the liquid level sensor of the liquid level of hydraulic oil container, checks liquid
Press oil the temperature sensor of case oil temperature, the air cleaner being connected with air.
In the case where not conflicting, above-mentioned improved technology scheme can be implemented alone or in combination.
The technical scheme that the present invention is provided, can limit hydraulic jack by the second Double throttle check valve, Bidirectional balanced valve
Oil return speed, the speed for moving jib lubbing mechanism obtains stabilization, and is not influenceed by load change；Under the static operating mode of oil cylinder,
Hydraulic control one-way valve is closed, and oil cylinder is kept pressure stability for a long time under static operating mode；When hydraulic jack changes jobs shape in change
During state, engineering machinery jib lubbing mechanism can be avoided in commutation process provided with overflow valve, hydraulic shock is produced, and too high system occur
Pressure, reversal valve is because that with time delayses device, can extend the commutating period of reversal valve, so that hydraulic system is protected, extension member
The service life of device；Damaged etc. in emergency circumstances when system decompression or hydraulic oil pump occurs in hydraulic system, can slowly open the
One throttling stop valve or the second throttling stop valve, realize the reset of engineering machinery jib lubbing mechanism.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, constitutes the part of the application, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, but do not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is speed limit locking circuit theory figure of the prior art using one-way throttle valve；
Fig. 2 is speed limit locking circuit theory figure of the prior art using balanced valve；
Fig. 3 is the hydraulic control system schematic diagram of the engineering machinery jib lubbing mechanism of embodiment 1；
Fig. 4 is the hydraulic control system schematic diagram of the engineering machinery jib lubbing mechanism of embodiment 2.
Embodiment
The embodiment to the present invention is described in further detail below in conjunction with the accompanying drawings.
Embodiment 1:
The hydraulic control system of engineering machinery jib lubbing mechanism as shown in Figure 3, including hydraulic oil container 1；Oil inlet and hydraulic pressure
The hydraulic oil pump 2 that fuel tank 1 is connected；The first reversal valve 9 and the second reversal valve 6 that oil inlet is connected with the oil-out of hydraulic oil pump 2；
The first Double throttle check valve 10 connected with two actuator ports of the first reversal valve 9；Control port is unidirectionally saved with first pair respectively
Flow the first hydraulic control one-way valve 13.1 and the second hydraulic control one-way valve 13.2 that valve 10 is connected；Respectively with two work of the second reversal valve 6
Second Double throttle check valve 7 of hydraulic fluid port connection；The Bidirectional balanced valve 8 connected with the second Double throttle check valve 7；Put down respectively with two-way
Weigh valve and the first explosion-proof valve 12.1 of the first hydraulic control one-way valve 13.1 connection；Respectively with Bidirectional balanced valve and the second hydraulic control one-way valve
Second explosion-proof valve 12.2 of 13.2 connections；At least one rodless cavity and rod chamber respectively with the first hydraulic control one-way valve 13.1 and second
The hydraulic jack 16.1 that hydraulic control one-way valve 13.2 is connected；Oil inlet is connected with the rodless cavity of hydraulic jack 16.1, oil-out and liquid
Press oil the overflow valve 14.1 of first throttle stop valve 15.1 and first that case 1 is connected；Oil inlet has with the hydraulic jack 16.1
Rod cavity is connected, the second throttling stop valve 15.2 and the second overflow valve 14.2 that oil-out is connected with hydraulic oil container 1；Oil-out is distinguished
Connected with the rodless cavity and rod chamber of the hydraulic jack 16.1, the first check valve that oil inlet is connected with hydraulic oil container 1 respectively
17.1 and second check valve 17.2；Oil-out is connected with the rodless cavity and rod chamber of hydraulic jack 16.1 respectively, oil inlet and
One throttling stop valve 15.1, the second throttling stop valve 15.2, the oil-out of the first overflow valve 14.1 and the second overflow valve 14.2 connect
The 3rd logical check valve 18.1 and the 4th check valve 18.2.
Alternatively, the hydraulic control system of engineering machinery jib lubbing mechanism also includes the oil-out of oil inlet and hydraulic oil pump 2
Connection, the 5th check valve 19 that oil-out is connected with the first reversal valve 9 and the second reversal valve 6.
Alternatively, the hydraulic control system of engineering machinery jib lubbing mechanism is also connected including oil inlet with hydraulic oil pump 2, fuel-displaced
The 3rd overflow valve 3 that mouth is connected with hydraulic oil container 1.
Alternatively, the hydraulic control system of engineering machinery jib lubbing mechanism also includes and the first reversal valve 9 and the second reversal valve 6
Oil inlet connection pressure switch 11 and pressure gauge 20.
Alternatively, the hydraulic control system of engineering machinery jib lubbing mechanism also includes and the first reversal valve 9 and the second reversal valve 6
Oil return opening connection cooler 5；The filter 4 connected with cooler 5.
Operation principle：In the course of work, the YV1 of the YV3 of the first reversal valve 9 and the second reversal valve 6 obtains electric or dead electricity simultaneously,
The YV2 of the YV4 of first reversal valve 9 and the second reversal valve 6 simultaneously dead electricity or it is electric.When the YV3 of the first reversal valve 9 and second commutates
The YV1 of valve 6 simultaneously it is electric, the YV2 of the YV4 of the first reversal valve 9 and the second reversal valve 6 simultaneously dead electricity when, the first reversal valve 9 is to the
The right side of one Double throttle check valve 10（Facing view direction, similarly hereinafter）Fuel feeding, the left side of the first Double throttle check valve 10 and oil return
Pipeline connection, the second hydraulic control one-way valve 13.2 is controlled liquefaction opening, and the first hydraulic control one-way valve 13.1 is closed.Second reversal valve 6 to
The one-way throttle valve fuel feeding on the right side of the second Double throttle check valve 7, the one-way throttle valve in the left side of the second Double throttle check valve 7 and oil return
On the right side of pipeline connection, check valve and choke valve, Bidirectional balanced valve 8 of the hydraulic oil successively through the right side of the second Double throttle check valve 7
After check valve, the first explosion-proof valve 12.1, the first hydraulic control one-way valve 13.1, to the rodless cavity fuel feeding of hydraulic jack 16.1；It is two-way flat
The sequence valve in the left side of weighing apparatus valve 8 is opened, hydraulic oil in the rod chamber of hydraulic jack 16.1, successively through the second hydraulic control one-way valve
13.2nd, the second explosion-proof valve 12.2, the sequence valve in the left side of Bidirectional balanced valve 8, the adjustable throttling in left side of the second Double throttle check valve 7
Fuel tank is flowed back to after valve, the oil return opening of the second reversal valve 6.Second Double throttle check valve 7, the limitation hydraulic jack of Bidirectional balanced valve 8
The oil return speed of 16.1 rod chambers, makes the speed that jib lubbing mechanism is moved be limited and stably, and can long-time locking be positioned at
Optional position.
When the YV3 of the first reversal valve 9 and YV1 of the second reversal valve 6 is while dead electricity, the YV4 of the first reversal valve 9 and second is changed
To valve 6 YV2 simultaneously it is electric when, the first reversal valve 9 is to the left side of the first Double throttle check valve 10（Facing view direction, similarly hereinafter）
Fuel feeding, the right side of the first Double throttle check valve 10 is connected with return line, and the first hydraulic control one-way valve 13.1 is controlled liquefaction opening, the
Two hydraulic control one-way valves 13.2 are closed.Second reversal valve 6 is to the left side fuel feeding of the second Double throttle check valve 7, second pair of one-way throttle
The right side of valve 7 is connected with return line, check valve and choke valve of the hydraulic oil successively through the left side of the second Double throttle check valve 7, double
To after the check valve, the second explosion-proof valve 12.2, the second hydraulic control one-way valve 13.2 in the left side of balanced valve 8, to having for hydraulic jack 16.1
Rod cavity fuel feeding；The sequence valve on the right side of Bidirectional balanced valve 8 is opened, hydraulic oil in the rodless cavity of hydraulic jack 16.1, successively through the
One hydraulic control one-way valve 13.1, the first explosion-proof valve 12.1, the sequence valve on the right side of Bidirectional balanced valve 8, the right side of the second Double throttle check valve 7
Adjustable throttling, flow back to fuel tank after the oil return opening of the second reversal valve 6.In oil cylinder under static operating mode, the first hydraulic control one-way valve
13.1st, the second hydraulic control one-way valve 13.2 is closed, and oil cylinder is kept pressure stability under static operating mode.
When the piston rod contraction process of hydraulic jack 16.1 stops, the second hydraulic control one-way valve 13.2 stops to hydraulic jack
16.1 rod chamber oil-feed, the first hydraulic control one-way valve 13.1 is closed, and rodless cavity stopping is fuel-displaced, is now become in inertia and engineering machinery
Under the effect of weight of width mechanism, the oil pressure in rodless cavity continues to raise, and vacuum occurs in rod chamber, now, the first overflow valve
14.1 pressure releases, the second check valve 17.2 is from oil suction in hydraulic oil container 1.
When the piston rod of hydraulic jack 16.1, which stretches out process, to be stopped, the first hydraulic control one-way valve 13.1 stops to hydraulic jack
16.1 rodless cavity oil-feed, the second hydraulic control one-way valve 13.2 is closed, and rod chamber stopping is fuel-displaced, now under inertia effects, there is bar
The oil pressure of intracavitary continues to raise, and vacuum occurs in rodless cavity, now, the pressure release of the second overflow valve 14.2, the first check valve 17.1 from
Oil suction in hydraulic oil container 1.After the first overflow valve 14.1 or the pressure release of the second overflow valve 14.2, it is to avoid engineering machinery jib lubbing mechanism
In commutation process, there is too high system pressure, so as to protect hydraulic system, extend the service life of component.Reach fast
Speed braking.
When hydraulic system is in an emergency down, such as rapid decompression, the safety for guarantee engineering machinery jib lubbing mechanism is answered
Position, can slowly open the throttling stop valve 15.2 of first throttle stop valve 15.1 or second, make hydraulic jack 16.1 rodless cavity or
Hydraulic oil outflow in rod chamber, now, the rod chamber or rodless cavity of hydraulic jack 16.1 produce vacuum, and rod chamber produces vacuum
When, by the second check valve 17.2 from oil suction in hydraulic oil container 1, or the 4th check valve 18.2 is from first throttle stop valve 15.1 times
Oil suction in oil pipe or hydraulic oil container 1, when rodless cavity produces vacuum, by the first check valve 17.1 from oil suction in hydraulic oil container 1, or
3rd check valve 18.1 is from oil suction in the oil return pipe of the second throttling stop valve 15.2 or hydraulic oil container 1.Realize engineering machinery luffing machine
The reset of structure.
3rd overflow valve 3 is electromagnetic relief valve, safe valve action is played in systems, when the outlet pressure of hydraulic oil pump 2 is too high
Shi Qidong pressure releases, can be protected to system overload.
The fluid that 5th check valve 19 plays a part of to protect in institute's hydraulic pump, anti-locking system in systems enters hydraulic pump.
The first explosion-proof valve 12.1 and the second explosion-proof valve 12.2 are provided with system circuit.When high-pressure hose blast, to hydraulic pressure
The rodless cavity of oil cylinder 16.1 and the fuel-displaced carry out locking of rod chamber, it is to avoid hydraulic jack 16.1 produces pitching motion, it is to avoid safety
The generation of accident.
Pressure switch 11 sends alarm signal when loading suddenly change.
Embodiment 2, as shown in figure 4, engineering machinery jib lubbing mechanism is provided with two liquid of hydraulic jack 16.1 and second in parallel
Compressing cylinder 16.2, by the 3rd explosion-proof valve 12.3, the 4th explosion-proof valve 12.4, the 3rd hydraulic control one-way valve 13.3, the 4th hydraulic control one-way valve
13.4th, the second hydraulic oil of the composition such as the 3rd throttling stop valve 15.3, the 4th throttling stop valve 15.4 and overflow valve, check valve
The control component of cylinder 16.2 is identical with the control component of hydraulic jack 16.1, and connected mode is also identical, comes from whole system
See, the hydraulic jack 16.2 of hydraulic jack 16.1 and second and its control loop, both are parallel relationship.Its control process and principle
It is identical with embodiment 1, no longer it is described in detail.
It is clear that the invention is not restricted to which above preferred embodiment, can also be limited in the claims in the present invention and specification
In spiritual, the conversion and improvement of diversified forms are carried out, same technical problem can be solved, and obtains expected technique effect, therefore
Do not repeat.One of ordinary skill in the art can from present disclosure directly or all schemes for associating, if
Within the spirit that claim is limited, protection scope of the present invention is fallen within.
Claims (8)
1. a kind of hydraulic control system of engineering machinery jib lubbing mechanism, it is characterised in that including oil inlet and hydraulic oil container（1）Even
Logical hydraulic oil pump（2）；Oil inlet and the hydraulic oil pump（2）Oil-out connection the first reversal valve（9）With the second commutation
Valve（6）；With first reversal valve（9）Two actuator ports connection the first Double throttle check valve（10）；Control port is distinguished
With first Double throttle check valve（10）First hydraulic control one-way valve of connection（13.1）With the second hydraulic control one-way valve（13.2）；Point
Not with second reversal valve（6）Two actuator ports connection the second Double throttle check valve（7）；With described second pair unidirectional section
Flow valve（7）, the first hydraulic control one-way valve（13.1）With the second hydraulic control one-way valve（13.2）The Bidirectional balanced valve of connection（8）；At least one
Individual rodless cavity and rod chamber respectively with the first hydraulic control one-way valve（13.1）With the second hydraulic control one-way valve（13.2）The hydraulic oil of connection
Cylinder（16.1）；Oil inlet and the hydraulic jack（16.1）Rodless cavity connection, oil-out and hydraulic oil container（1）The first of connection
Throttling stop valve（15.1）With the first overflow valve（14.1）；Oil inlet and the hydraulic jack（16.1）Rod chamber connection, go out
Hydraulic fluid port and hydraulic oil container（1）Second throttling stop valve of connection（15.2）With the second overflow valve（14.2）；Oil-out respectively with institute
State hydraulic jack（16.1）Rodless cavity connected with rod chamber, oil inlet respectively with hydraulic oil container（1）First check valve of connection
（17.1）With the second check valve（17.2）；Oil-out respectively with the hydraulic jack（16.1）Rodless cavity connected with rod chamber,
Oil inlet and first throttle stop valve（15.1）, the second throttling stop valve（15.2）, the first overflow valve（14.1）With the second overflow
Valve（14.2）Oil-out connection the 3rd check valve（18.1）With the 4th check valve（18.2）.
2. the hydraulic control system of engineering machinery jib lubbing mechanism according to claim 1, it is characterised in that also including with institute
State Bidirectional balanced valve（8）With the first hydraulic control one-way valve（13.1）First explosion-proof valve of connection（12.1）；With the Bidirectional balanced valve
（8）With the second hydraulic control one-way valve（13.2）Second explosion-proof valve of connection（12.2）.
3. the hydraulic control system of engineering machinery jib lubbing mechanism according to claim 1, it is characterised in that also including oil-feed
Mouth and the hydraulic oil pump（2）Oil-out connection the 5th check valve（19）.
4. the hydraulic control system of engineering machinery jib lubbing mechanism according to claim 1, it is characterised in that also including with institute
State hydraulic oil pump（2）Oil-out connection the 3rd overflow valve（3）.
5. the hydraulic control system of engineering machinery jib lubbing mechanism according to claim 1, it is characterised in that also including with institute
State the first reversal valve（9）With the second reversal valve（6）Oil inlet connection pressure switch（11）And/or pressure gauge（20）.
6. the hydraulic control system of engineering machinery jib lubbing mechanism according to claim 1, it is characterised in that also including with institute
State the first reversal valve（9）With the second reversal valve（6）Oil return opening connection cooler（5）.
7. the hydraulic control system of engineering machinery jib lubbing mechanism according to claim 1, it is characterised in that also including setting
In first reversal valve（9）With the second reversal valve（6）Oil returning tube on filter（4）.
8. the hydraulic control system of engineering machinery jib lubbing mechanism according to claim 1, it is characterised in that also include and liquid
Press oil case（1）The visual liquid level gauge of connection, thermometer checks hydraulic oil container（1）Liquid level liquid level sensor, check hydraulic pressure
Fuel tank（1）The temperature sensor of oil temperature, the air cleaner being connected with air.
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| CN201610275232.7A CN105822615B (en) | 2016-04-29 | 2016-04-29 | The hydraulic control system of engineering machinery jib lubbing mechanism |
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| CN201610275232.7A CN105822615B (en) | 2016-04-29 | 2016-04-29 | The hydraulic control system of engineering machinery jib lubbing mechanism |
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| CN105822615B true CN105822615B (en) | 2017-10-03 |
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| CN205136175U (en) * | 2015-10-13 | 2016-04-06 | 华中科技大学无锡研究院 | Hydraulic pressure upset control system |
| CN205559385U (en) * | 2016-04-29 | 2016-09-07 | 泰富重工制造有限公司 | Engineering machine tool amplitude changing device's hydraulic control system |
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2016
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202322125U (en) * | 2011-10-21 | 2012-07-11 | 四川宏华石油设备有限公司 | Hydraulic control system with adjustable amplitude for articulated lifting device |
| CN202988660U (en) * | 2012-11-04 | 2013-06-12 | 西安志越机电科技有限公司 | Variation amplitude and rotary hydraulic circuit for operation arm of high-altitude operation car |
| CN103787243A (en) * | 2012-11-04 | 2014-05-14 | 西安志越机电科技有限公司 | Hydraulic circuit for aerial work vehicle operating arm telescoping devices |
| CN202937013U (en) * | 2012-12-05 | 2013-05-15 | 中联重科股份有限公司 | Cantilever crane hydraulic system, cantilever crane system and concrete pumping equipment |
| CN204572601U (en) * | 2015-04-17 | 2015-08-19 | 南京中船绿洲机器有限公司镇江船舶辅机厂 | Boat handing derrick hydraulic synchronous control system |
| CN204704176U (en) * | 2015-04-23 | 2015-10-14 | 凯迈（洛阳）测控有限公司 | A kind of piston elevator mechanism and hydraulic control device thereof |
| CN205136175U (en) * | 2015-10-13 | 2016-04-06 | 华中科技大学无锡研究院 | Hydraulic pressure upset control system |
| CN205559385U (en) * | 2016-04-29 | 2016-09-07 | 泰富重工制造有限公司 | Engineering machine tool amplitude changing device's hydraulic control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105822615A (en) | 2016-08-03 |
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Denomination of invention: Hydraulic control system of engineering machinery amplitude change mechanism Effective date of registration: 20180503 Granted publication date: 20171003 Pledgee: Xiangtan Jiuhua Economic Construction Investment Co., Ltd. Pledgor: Tidfore Engineering Co., Ltd.|Tidfore Heavy Industry Co., Ltd.|Ocean engineering equipment (Tianjin) Co., Ltd. Registration number: 2018430000029 |