CN207879739U - Hydraulic system for all hydraulic caterpillar reverse circulation engineering drilling rig - Google Patents
Hydraulic system for all hydraulic caterpillar reverse circulation engineering drilling rig Download PDFInfo
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- CN207879739U CN207879739U CN201820058785.1U CN201820058785U CN207879739U CN 207879739 U CN207879739 U CN 207879739U CN 201820058785 U CN201820058785 U CN 201820058785U CN 207879739 U CN207879739 U CN 207879739U
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Abstract
The utility model is related to the hydraulic systems for all hydraulic caterpillar reverse circulation engineering drilling rig, it includes that power head feeding hydraulic system, power head Hydraulic slewing system, vacuum pump and slush pump composite hydraulic system, complete machine vibration hydraulic system, complete machine Hydraulic slewing system, hoisting hydraulic system, rack are risen and fallen hydraulic system, landing leg stretching hydraulic system, supporting leg hydraulic system for lifting, hydraulic oil cooling system and hydraulic pump, it is characterized in that：Power head feeding hydraulic system, power head Hydraulic slewing system, vacuum pump and slush pump composite hydraulic system, complete machine vibration hydraulic system are in parallel with Main Hydraulic Pump, constitute power head rotation, power head feeding, vacuumize the control loop walked with mud, complete machine；The utility model realizes the operation advantage for having given full play to all hydraulic caterpillar reverse circulation engineering drilling rig under bad working environments, meets requirement of the market for the special operation operating mode of engineering driller.
Description
Technical field
The utility model is related to the hydraulic systems for all hydraulic caterpillar reverse circulation engineering drilling rig.
Background technology
Currently, with China's Urbanization Construction engineering, expressway works, High Speed Rail Projects, urban light rail engineering with
And the construction projects such as farmland water conservancy works input continues to increase, all hydraulic caterpillar reverse circulation engineering drilling rig application is more and more wider
General, to all hydraulic caterpillar reverse circulation engineering drilling rig drilling technique, more stringent requirements are proposed.It is traditional currently on the market counter to follow
Ring engineering driller is complicated, and cost is higher, and operating efficiency is low, and mobility is poor.Because of the hydraulic system of reverse circulation engineering drilling rig
Disadvantage solution not yet in effect, it is serious to restrict promoting the use of on a large scale for all hydraulic caterpillar reverse circulation engineering drilling rig.
Utility model content
Technical problem to be solved in the utility model is generally speaking to provide a kind of for all hydraulic caterpillar reacting cycle
The hydraulic system of engineering driller；The technical issues of solving in detail and acquirement advantageous effect in aftermentioned content and combine specific real
Content in mode is applied to specifically describe.
To solve the above problems, technical solution adopted in the utility model is：
A kind of hydraulic system for all hydraulic caterpillar reverse circulation engineering drilling rig, is mounted on that all hydraulic caterpillar is counter follows
On ring engineering driller, the hydraulic system includes hydraulic station comprising fuel tank, active force element and/or secondary dynamical element；Its
In, active force element includes that main import is arranged in fuel tank and is connected on Main Hydraulic Pump group by motor-driven Main Hydraulic Pump group, side
Overload protection valve between outlet and fuel tank；Secondary dynamical element includes that the secondary hydraulic pump being arranged in fuel tank with import, side are connected on
Safety valve between secondary hydraulic pump outlet and fuel tank；The hydraulic system further includes and more than one following hydraulic system,
Power head feeds hydraulic system comprising power head feed cylinder and power head feeding control multi-way valve；Wherein, power head
Feeding control one import of multi-way valve and Main Hydraulic Pump group outlet, power head feeding control another import of multi-way valve and fuel tank are logical
Cross oil return line connection；The outlet of power head feeding control multi-way valve one is connected to the rodless cavity of power head feed cylinder, in power
It is provided with flow divider-combiner between another outlet of head feeding control multi-way valve and the rod chamber of power head feed cylinder；Power head returns
Turn hydraulic system comprising power head rotary motor and power head revolution control multi-way valve, wherein power head revolution control
One import of multi-way valve and Main Hydraulic Pump group outlet, power head revolution control another import of multi-way valve pass through oil return pipe with fuel tank
Road is connected to；The outlet of power head revolution control multi-way valve one is connected to the Single port of power head rotary motor, is turned round and is controlled in power head
Another export of multi-way valve processed is provided with speed governing valve between the another port of power head rotary motor；Vacuum pump is compound with slush pump
Hydraulic system comprising the vacuum pump hydraulic system being arranged in parallel and mud pump hydraulic system；Wherein, vacuum pump hydraulic system packet
Include vacuum pump control multi-way valve, vaccum pump motor and check valve；Vacuum pump control one import of multi-way valve goes out with Main Hydraulic Pump group
Mouth connection, vacuum pump control another import of multi-way valve are connected to fuel tank by oil return line；Vacuum pump controls the outlet of multi-way valve
Divide two-way, all the way by the inlet communication of shut-off valve and vaccum pump motor, another way passes through oil return pipe by check valve and fuel tank
Road is connected to, and the outlet of vaccum pump motor is connected to fuel tank by oil return line by check valve；Mud pump hydraulic system includes mud
Stock pump controls multiple directional control valve, mud pump motor, shut-off valve and counterbalance valve；Slush pump control one import of multiple directional control valve with
Main Hydraulic Pump group outlet, slush pump control another import of multiple directional control valve are connected to fuel tank by oil return line；Vacuum pump
The outlet of multi-way valve is controlled by the inlet communication of shut-off valve and mud pump motor, the outlet of mud pump motor by counterbalance valve and
Fuel tank is connected to by oil return line；Complete machine vibration hydraulic system comprising left vibration hydraulic system and the right lateral being arranged in parallel are walked
Hydraulic system；Wherein left vibration hydraulic system includes right travelling control multi-way valve and right running motor；Right travelling control multichannel
One import of valve and Main Hydraulic Pump group outlet, right another import of travelling control multi-way valve are connected to fuel tank by oil return line；
The right outlet of travelling control multi-way valve one is connected to the Single port of right running motor；Another outlet of right travelling control multi-way valve and right lateral
Walk the another port connection of motor；Right vibration hydraulic system includes left running motor and left travelling control multi-way valve；Left lateral is walked
One import of multi-way valve and Main Hydraulic Pump group outlet are controlled, left another import of travelling control multi-way valve passes through oil return pipe with fuel tank
Road is connected to；The left outlet of travelling control multi-way valve one is connected to the Single port of left running motor；Left travelling control multi-way valve it is another go out
Mouth is connected to the another port of left running motor；Hoisting hydraulic system comprising left hoisting hydraulic system and a left side
The identical right hoisting hydraulic system of hoisting hydraulic system connection structure；Left hoisting hydraulic system includes elevator horse
It reaches and left rolling control multi-way valve；Left one import of rolling control multi-way valve is connected to secondary hydraulic pump outlet, and left rolling control is more
Valve another import in road is connected to fuel tank by oil return line；The left outlet of rolling control multi-way valve one passes through pipeline L and hoist motor
Single port connection；Left another outlet of rolling control multi-way valve is connected to by pipeline l with the another port of hoist motor；Complete machine is returned
Turn hydraulic system comprising vehicle rotary motor and vehicle revolution control multi-way valve；Vehicle revolution control one import of multi-way valve
It is connected to secondary hydraulic pump outlet, vehicle revolution control another import of multi-way valve is connected to fuel tank by oil return line；Vehicle turns round
The outlet of control multi-way valve one is connected to the Single port of vehicle rotary motor；Another outlet of vehicle revolution control multi-way valve is returned with vehicle
Turn the another port connection of motor；It is provided on the pipeline that vehicle turns round between control multi-way valve and vehicle rotary motor
Shut-off valve；Landing leg stretching hydraulic system comprising landing leg stretching oil cylinder and landing leg stretching control multi-way valve；Landing leg stretching control
One import of multi-way valve processed is connected to secondary hydraulic pump outlet, and landing leg stretching control another import of multi-way valve passes through oil return line with fuel tank
Connection；The outlet of landing leg stretching control multi-way valve one is connected to landing leg stretching oil cylinder rodless cavity, and it is another that landing leg stretching controls multi-way valve
Outlet is connected to landing leg stretching cylinder rod chamber；Supporting leg hydraulic system for lifting comprising hydraulic lock, supporting leg lifting cylinder and
Supporting leg elevating control multi-way valve；One inlet communication of secondary hydraulic pump and supporting leg elevating control multi-way valve, fuel tank are controlled with supporting leg lifting
One inlet communication of multi-way valve processed, hydraulic lock are arranged between the outlet and supporting leg lifting cylinder of supporting leg elevating control multi-way valve；
Rack hydraulic system for lifting comprising rack lift ram and rack rising and dropping control multi-way valve.
As a further improvement of the above technical scheme：
This hydraulic system further includes cooling hydraulic system comprising the cooling that its import is connected to fuel tank by oil return line
Pump, with the pipeline N of cooling pump outlet, the in parallel and other overflow valve being connected between pipeline N and fuel tank and 2/2-way multichannel
Valve and the cooling unit being connected to pipeline N primary outlets.
Hydraulic station, further include be separately positioned between Main Hydraulic Pump group and fuel tank and/or secondary hydraulic pump and fuel tank between
Butterfly valve, be arranged at Main Hydraulic Pump group exit and/or secondary hydraulic pump outlet hydraulic oil filter, be arranged in tank drainback
Oil return integrated package on pipeline, the return filter being arranged between oil return integrated package and fuel tank, the pressure on pipeline
Table.
Power head revolution control multi-way valve is three six logical pilot operated valve devices, and power head revolution controls position off-load in multi-way valve；
It is provided with check valve between power head revolution control one import of multi-way valve and the outlet of Main Hydraulic Pump group；Power head feeding control multichannel
Valve is three six logical pilot operated valve devices, and power head feeding controls position off-load in multi-way valve；Control one import of multi-way valve is fed in power head
It is provided with check valve between being exported with Main Hydraulic Pump group.
It is three-position five-way pilot operated valve that vacuum pump, which controls multi-way valve with slush pump control multiple directional control valve, and vacuum pump controls multichannel
Valve and position off-load in slush pump control multiple directional control valve；It is controlled between one import of multi-way valve and the outlet of Main Hydraulic Pump group in vacuum pump
It is provided with check valve；It is controlled in slush pump and is provided with check valve between one import of multiple directional control valve and the outlet of Main Hydraulic Pump group.
The shuttle valve in parallel with hoist motor is connected between pipeline L and pipeline l；Hoist motor carries damper；In pipe
Road L is exported and is connected with check valve pipeline and sequence valve between the Single port of hoist motor, and control mouth and the pipeline l of sequence valve connect
It is logical；Right travelling control multi-way valve, left travelling control multi-way valve, left rolling control multi-way valve, landing leg stretching control multi-way valve, vehicle
Revolution control multi-way valve, rack rising and dropping control multi-way valve and supporting leg elevating control multichannel valve arrangement are identical.
Multichannel is controlled in right travelling control multi-way valve, left travelling control multi-way valve, left rolling control multi-way valve, landing leg stretching
Valve, vehicle revolution control multi-way valve are respectively arranged on rack rising and dropping control multi-way valve and supporting leg elevating control multi-way valve pair
The pilot valve answered.
The beneficial effects of the utility model description without being limited thereto, in order to preferably be easy to understand, in specific implementation mode portion
Divide and has carried out more detailed description.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram of the utility model First partial.
Fig. 3 is the structural schematic diagram of the second part of the utility model.
Fig. 4 is the structural schematic diagram of the utility model third part.
Fig. 5 is the structural schematic diagram of the 4th part of the utility model.
Fig. 6 is the structural schematic diagram of the 5th part of the utility model.
Fig. 7 is the structural schematic diagram of the 6th part of the utility model.
Fig. 8 is the structural schematic diagram of the 7th part of the utility model.
Wherein：1, return filter；2, butterfly valve；3, Main Hydraulic Pump group；4, motor；5, cooling unit；6, oil return integrated package；
7, pressure gauge；8, hydraulic oil filter；9, right travelling control multi-way valve；10, slush pump controls multiple directional control valve；11, vacuum pump
Control multi-way valve；12, overload protection valve；13, check valve；14, shut-off valve；15, counterbalance valve；16, mud pump motor；17, vacuum
Pump motor；18, power head rotary motor；19, power head feed cylinder；20, flow divider-combiner；21, right running motor；22, left
Running motor；23, power head revolution control multi-way valve；24, power head feeding control multi-way valve；25, left travelling control multi-way valve；
26, pilot valve；27, overflow valve；28,2/2-way multi-way valve；29, secondary hydraulic pump；30, check valve pipeline；31, left rolling control
Multi-way valve；32, shuttle valve；33, hoist motor；34, sequence valve；35, vehicle rotary motor；36, rack lift ram；37, hydraulic pressure
Lock；38, supporting leg lifting cylinder；39, landing leg stretching oil cylinder；40, landing leg stretching controls multi-way valve；41, supporting leg elevating control multichannel
Valve；42, rack rising and dropping control multi-way valve；43, vehicle revolution control multi-way valve.
Specific implementation mode
As shown in figures 1-8（In order to indicate clear in limited length, drawing is disassembled, same letter indicates same
Pipeline）A kind of hydraulic system for all hydraulic caterpillar reverse circulation engineering drilling rig, be mounted on that all hydraulic caterpillar is counter follows
On ring engineering driller comprising
Hydraulic station comprising fuel tank, active force element and/or secondary dynamical element；Wherein, active force element includes main import
Main Hydraulic Pump group 3, the other overload being connected between the outlet of Main Hydraulic Pump group 3 and fuel tank for being arranged in fuel tank and being driven by motor 4
Protect valve 12；Secondary dynamical element include the secondary hydraulic pump 29 being arranged in fuel tank with import, side be connected on the outlet of secondary hydraulic pump 29 with
Safety valve between fuel tank；
And more than one following hydraulic system,
Power head feeds hydraulic system comprising power head feed cylinder 19 and power head feeding control multi-way valve 24；
Wherein, power head feeding control 24 1 import of multi-way valve and 3 outlet of Main Hydraulic Pump group, power head feeding control multi-way valve 24
Another import is connected to fuel tank by oil return line；Power head feeding control multi-way valve 24 1 outlet and power head feed cylinder 19
Rodless cavity connection, power head feed control multi-way valve 24 it is another outlet the rod chamber of power head feed cylinder 19 between set
It is equipped with flow divider-combiner 20；
When specifically used, not operation, pump off-load works；When needing feeding, by pilot valve or automatically controlled dynamic
Power head feeding control multi-way valve 24, hydraulic oil enter power head feed cylinder 19, and oil cylinder extends, to realize that power head is fed,
When retracting, control multi-way valve 24 is fed by power head and is commutated, oil cylinder is retracted, to realize that power head declines.By unidirectional
Valve ensures running of hydraulic power oil steady flow, and ensureing that power head is at the uniform velocity stablized by flow divider-combiner 20 declines.
Power head Hydraulic slewing system comprising power head rotary motor 18 and power head revolution control multi-way valve 23,
Wherein, power head revolution control 23 1 import of multi-way valve and 3 outlet of Main Hydraulic Pump group, power head revolution control multi-way valve 23
Another import is connected to fuel tank by oil return line；Power head revolution control multi-way valve 23 1 outlet and power head rotary motor 18
Single port connection, power head turn round control multi-way valve 23 it is another outlet the another port of power head rotary motor 18 between
It is provided with speed governing valve；
When specifically used, not operation, pump off-load works；When needing rotary work, by pilot valve or automatically controlled
Power head revolution control multi-way valve 23, hydraulic oil enter power head rotary motor 18, power head rotation；When reversely rotating, lead to
It crosses power head revolution control multi-way valve 23 to commutate, power head reversely rotates.Ensure running of hydraulic power oil steady flow by check valve.
Vacuum pump and slush pump composite hydraulic system comprising the vacuum pump hydraulic system being arranged in parallel and mud pump hydraulic pressure
System；
Wherein, vacuum pump hydraulic system includes vacuum pump control multi-way valve 11, vaccum pump motor 17 and check valve 13；
Vacuum pump controls 11 1 import of multi-way valve and 3 outlet of Main Hydraulic Pump group, and vacuum pump controls 11 another import of multi-way valve and oil
Case is connected to by oil return line；The outlet of vacuum pump control multi-way valve 11 divides two-way, passes through shut-off valve and vaccum pump motor all the way
17 inlet communication, another way are connected to fuel tank by oil return line by check valve 13, and the outlet of vaccum pump motor 17 passes through
Check valve is connected to fuel tank by oil return line；
Mud pump hydraulic system includes slush pump control multiple directional control valve 10, mud pump motor 16, shut-off valve 14 and the back of the body
Pressure valve 15；Slush pump controls 10 1 import of multiple directional control valve and 3 outlet of Main Hydraulic Pump group, and slush pump controls multiple directional control valve
10 another imports are connected to fuel tank by oil return line；The outlet of vacuum pump control multi-way valve 11 passes through shut-off valve 14 and slush pump
The outlet of the inlet communication of motor 16, mud pump motor 16 is connected to fuel tank by oil return line by counterbalance valve 15；
Check valve setting vacuum pump and slush pump complex controll multi-way valve 10 and 11 and vacuum pump 17 and slush pump 16 it
Between, form one-way hydraulic circuit；Counterbalance valve 15 is arranged between vacuum pump 17 and slush pump 16 and fuel tank, forms backpressure circuit；
Pilot valve 26 is arranged between vacuum pump and slush pump complex controll multi-way valve 10 and 11 and vacuum pump 17 and slush pump 16, composition
Slurry-sucking and vacuum complex control loop；Wherein, it is preferable that check valve 13 is 16 groups, and shut-off valve 14 is six groups, and counterbalance valve 16 is
Two groups；When specific works, slush pump controls position and forward and reverse control during multiple directional control valve/vacuum pump control multi-way valve 11 is realized.
Complete machine vibration hydraulic system comprising the left vibration hydraulic system being arranged in parallel and right vibration hydraulic system；
Wherein left vibration hydraulic system includes right travelling control multi-way valve 9 and right running motor 21；Right travelling control is more
9 one import of road valve and 3 outlet of Main Hydraulic Pump group, the 9 another import of right travelling control multi-way valve pass through oil return line with fuel tank
Connection；The right outlet of travelling control multi-way valve 9 one is connected to the Single port of right running motor 21；Right travelling control multi-way valve 9 is another
Outlet is connected to the another port of right running motor 21；
Right vibration hydraulic system includes left running motor 22 and left travelling control multi-way valve 25；Left travelling control multichannel
25 1 import of valve and 3 outlet of Main Hydraulic Pump group, the 25 another import of left travelling control multi-way valve pass through oil return line with fuel tank
Connection；The left outlet of travelling control multi-way valve 25 1 is connected to the Single port of left running motor 22；Left travelling control multi-way valve 25 is another
One outlet is connected to the another port of left running motor 22；
Pilot valve 26 is arranged between travelling control multi-way valve 9 and 25 and running motor 21 and 22, composition complete machine walking control
Circuit processed；Wherein, running motor is two groups, and the actions such as walking, the steering of running motor are controlled by travelling control multi-way valve.
Hoisting hydraulic system comprising left hoisting hydraulic system and the connection of left hoisting hydraulic system
The identical right hoisting hydraulic system of structure；Left hoisting hydraulic system includes hoist motor 33 and left rolling control
Multi-way valve 31；Left 31 1 import of rolling control multi-way valve and 29 outlet of secondary hydraulic pump, left rolling control multi-way valve 31 are another
Import is connected to fuel tank by oil return line；The left outlet of rolling control multi-way valve 31 1 passes through pipeline L and the one of hoist motor 33
Port is connected to；The left another outlet of rolling control multi-way valve 31 is connected to by pipeline l with the another port of hoist motor 33；
Complete machine Hydraulic slewing system comprising vehicle rotary motor 35 and vehicle revolution control multi-way valve 43；Vehicle returns
Turn control 43 1 import of multi-way valve and 29 outlet of secondary hydraulic pump, vehicle revolution control 43 another import of multi-way valve and fuel tank are logical
Cross oil return line connection；The outlet of vehicle revolution control multi-way valve 43 1 is connected to the Single port of vehicle rotary motor 35；Vehicle returns
Turn another outlet of control multi-way valve 43 to be connected to the another port of vehicle rotary motor 35；Vehicle turn round control multi-way valve 43 with
It is provided with shut-off valve on a pipeline between vehicle rotary motor 35；
Between complete machine rotary motor 35 and vehicle revolution control multi-way valve 43, composition stops circuit soon, whole for shut-off valve setting
Vehicle revolution control multi-way valve 43 realizes the positive and negative rotation of complete machine rotary motor 35.
Landing leg stretching hydraulic system comprising landing leg stretching oil cylinder 39 and landing leg stretching control multi-way valve 40；Supporting leg is stretched
Contracting control 40 1 import of multi-way valve and 29 outlet of secondary hydraulic pump, it is logical with fuel tank that landing leg stretching controls 40 another import of multi-way valve
Cross oil return line connection；The outlet of landing leg stretching control multi-way valve 40 1 is connected to 39 rodless cavity of landing leg stretching oil cylinder, landing leg stretching
Another outlet of control multi-way valve 40 is connected to 39 rod chamber of landing leg stretching oil cylinder；
Wherein, supporting leg lifting cylinder 39 and supporting leg lifting cylinder control multi-way valve 40 are four groups, pass through landing leg stretching
Control the flexible realization lifting of the corresponding oil cylinder of the control of multi-way valve 40.
Supporting leg hydraulic system for lifting comprising hydraulic lock 37, supporting leg lifting cylinder 38 and supporting leg elevating control multi-way valve
41；One inlet communication of secondary hydraulic pump 29 and supporting leg elevating control multi-way valve 41, fuel tank and supporting leg elevating control multi-way valve 41
One inlet communication, hydraulic lock 37 are arranged between the outlet and supporting leg lifting cylinder 38 of supporting leg elevating control multi-way valve 41；
Wherein, hydraulic lock 37, supporting leg lifting cylinder 38 and supporting leg lifting cylinder control multi-way valve 41 are four groups, hydraulic pressure
Lock realizes pressurize, and the lifting of corresponding supporting leg is realized by valve group.
Rack hydraulic system for lifting comprising rack lift ram 36 and rack rising and dropping control multi-way valve 42；
Rack lift ram 36 is two groups, and fuel tank is connected by rack rising and dropping control multi-way valve 42 and rack lift ram 36
It is logical.
Cooling hydraulic system comprising the cooling pump and cooling pump discharge that its import is connected to fuel tank by oil return line
Pipeline N, parallel connection and the other overflow valve 27 being connected between pipeline N and fuel tank of connection and 2/2-way multi-way valve 28 and pipeline N master
The cooling unit 5 of outlet,
Hydraulic station, further include be separately positioned between Main Hydraulic Pump group 3 and fuel tank and/or secondary hydraulic pump 29 and fuel tank it
Between butterfly valve 2, be arranged and exist in the hydraulic oil filter 8 in 3 exit of Main Hydraulic Pump group and/or secondary 29 exit of hydraulic pump, setting
Oil return integrated package 6 on tank drainback pipeline, is mounted on pipe at the return filter 1 being arranged between oil return integrated package 6 and fuel tank
The pressure gauge 7 of road.
Power head revolution control multi-way valve 23 is three six logical pilot operated valve devices, and power head revolution controls position in multi-way valve 23 and unloads
Lotus；It is provided with check valve between power head turns round control 23 1 import of multi-way valve and Main Hydraulic Pump group 3 exports；
Power head feeding control multi-way valve 24 is three six logical pilot operated valve devices, and power head feeding controls position in multi-way valve 24 and unloads
Lotus；It is provided with check valve between power head feeds control 24 1 import of multi-way valve and Main Hydraulic Pump group 3 exports；
Power head rotary motor is two groups；
It is three-position five-way pilot operated valve, vacuum pump control that vacuum pump, which controls multi-way valve 11 with slush pump control multiple directional control valve 10,
Multi-way valve 11 and slush pump control are more
Position off-load in way reversing valve 10；It is set between vacuum pump controls 11 1 import of multi-way valve and Main Hydraulic Pump group 3 exports
It is equipped with check valve；It is provided with check valve between slush pump controls 10 1 import of multiple directional control valve and Main Hydraulic Pump group 3 exports；
The shuttle valve 32 in parallel with hoist motor 33 is connected between pipeline L and pipeline l；Hoist motor 33 is with damping
Device；
It is connected with check valve pipeline 30 and sequence valve 34 between the outlets pipeline L and the Single port of hoist motor 33, sequence
The control mouth of valve 34 is connected to pipeline l；
The setting of flow divider-combiner 20 forms liquid between power head feed cylinder 19 and power head feeding control multi-way valve 24
Press equalized current circuit；Overload protection valve 12 prevents from overloading caused hydraulic fault；Shuttle valve 32 and sequence valve 34 are arranged in hoist motor
Between 33 and hoist motor control multi-way valve 30 and 31, sequentially-operating circuit is formed, realizes sequentially-operating control；Wherein, shuttle valve
32, hoist motor 33 and sequence valve 34 are two groups.
Damper realizes control of slowing down.
The setting of pilot valve 26 forms power head between power head feed cylinder 19 and power head feeding control multi-way valve 24
Feed control loop；Wherein, power head feed cylinder 19 is two groups, and overload protection valve 12 is five groups, and pilot valve 26 is three groups.It is right
Travelling control multi-way valve 9, left travelling control multi-way valve 25, left rolling control multi-way valve 31, landing leg stretching control multi-way valve 40, whole
Vehicle revolution control multi-way valve 43, rack rising and dropping control multi-way valve 42, supporting leg elevating control multi-way valve 41, structure is identical.
In right travelling control multi-way valve 9, left travelling control multi-way valve 25, left rolling control multi-way valve 31, landing leg stretching control
Multi-way valve 40, vehicle revolution control multi-way valve 43, rack rising and dropping control multi-way valve 42 and supporting leg elevating control multi-way valve 41 processed
On be respectively arranged with corresponding pilot valve 26.
Power head feed hydraulic system, power head Hydraulic slewing system, vacuum pump and slush pump composite hydraulic system and/
Or it is connect with the outlet of Main Hydraulic Pump group 3 after complete machine vibration hydraulic system parallel connection；
The corresponding power head that constitutes feeds, power head rotation, vacuumizes the control loop walked with mud, complete machine respectively for it；
Hoisting hydraulic system, complete machine Hydraulic slewing system, landing leg stretching hydraulic system, landing leg stretching hydraulic system,
And/or it is connect with the outlet of secondary hydraulic pump 29 after rack hydraulic system for lifting parallel connection；
Its control loop that corresponding composition hoisting, complete machine revolution, landing leg stretching, supporting leg lifting, rack lift respectively；
Cooling hydraulic system is connect with the outlet of secondary hydraulic pump 29；It constitutes the cooling hydraulic circuit to cool down to system.
When work, in vacuum pump and slush pump hydraulic system of working, the fuel feeding of vaccum pump motor 17 and mud pump motor 16
By the variable pump supply in three Main Hydraulic Pump groups 3, the more of the control work of vaccum pump motor 16 in circuit are manipulated first
The pilot valve 26 of road valve 10 starts vacuum pump work, after vacuum pump generates vacuum, about 5-8 seconds, and manipulation and control mud pump motor
The pilot valve 26 of the multi-way valve control 11 of 17 work, starts mud pump work, is simultaneously stopped vacuum pump work.Power head revolution,
It feeds in hydraulic system of working, the fuel feeding of power head rotary motor 18 and power head feed cylinder 19 is by three Main Hydraulic Pump groups 3
In the supply of another variable pump so that power head is turned round work, and real by the pilot valve 26 of manipulation and control multi-way valve 23 and 24
It now floats and feeds, pressurization feeding, depressurizes the courses of work such as feeding and power head promotion.The mechanisms such as supporting leg, rack, revolution, elevator
The fuel feeding of respective drive cylinder or motor is supplied by two pair hydraulic pumps 29, manipulates the corresponding of the multiple directional control valve in circuit
Control crank realizes the course of work of each mechanism.The fuel feeding of running motor 21 and 22 is respectively by three Main Hydraulic Pump groups 3
Two variable pump supplies, the pilot valve 26 for manipulating the multi-way valve 9 and 25 that control walking pump motor 21 and 22 works control its work, first
The fuel feeding of pilot valve 26 is supplied by the constant displacement pump in three Main Hydraulic Pump groups, is manipulated pilot valve 26 and is controlled multi-way valve 9 and 25 to walking
The advance, retrogressing and the steering course of work of complete machine are realized in the walking work of the Fuel injection system control complete machine of motor 21 and 22.
The utility model is designed reasonably, of low cost, durable, safe and reliable, easy to operate, time saving and energy saving, saving
It is fund, compact-sized and easy to use.
Specifically, power head revolution hydraulic circuit mainly by cooler, duplex plunger pump, surge guide's multiple directional control valve
YW and the power rotation motor composition being arranged symmetrically.Pump is limited pressure variable double-piston pump, has load-sensitive characteristic, pumps and be
Power head rotary loop is shared with feeding circuit, has then separately designed elder generation of surging in power head rotary loop and feeding circuit
Multiple directional control valve YW is led, to avoid influencing each other for pressure between each circuit and flow.Pump, valve, check valve and overflow valve composition
One pump control load sensitive system improves adaptive load to reduce influence of the drill load variation to power head rotating speed
Property, to more accurately control power head rotating speed.When drilling machine creeps into work, turning between power head and drilling rod to reduce
Damage, devises the double power head motor being arranged symmetrically, to further increase caused by when square, torque and moment of flexure collective effect
To the control accuracy of executive component, the power of bigger is provided, it is more efficient energy saving, it is conveniently operated.By hydraulic control guiding manual valve come
Change the position for guide's multiple directional control valve YW that surges, thus it is possible to vary power head motor rotation direction, to change drilling rod rotation side
To realization positive and negative rotation.
Reverse circulation engineering drilling rig power head revolution hydraulic circuit has used pump control load sensitive system and drilling machine double pump+auxiliary pump
Hydraulic control system.
Pump control load sensitive system mainly by main pump, check valve, surge guide's multiple directional control valve YW and overflow valve forms, it is main
Pump is limited pressure variable double-piston pump, has load-sensitive characteristic, pumps and is shared by power head rotary loop and feeding circuit,
Single pump multiloop control system has loaded self-adaptive, energy saving, at low cost, system installed power compared to single pump single loop control system
The advantages that small, has separately designed on feeding circuit by guide's multiple directional control valve YW, the check valve of surging in power head rotary loop
And the pilot operated valve device with distribution of load independent flow and load feedback function of overflow valve composition, it can be pressed to avoid between two circuits
The influence of power and flow.In all-hydraulic vehicle-mounted reverse circulation engineering drilling rig hydraulic system, using pump control load-sensitive technology can be with
It is effectively improved interference of the load variation to power head rotational speed, to improve the loaded self-adaptive of bit pressure, in this way
Executing agency's speed is accurately controlled with realizing, improves the mobility of drilling machine.
Drilling machine double pump+auxiliary pump liquid pressure control system is mainly by main two main pumps and an auxiliary pump group at generally all-hydraulic
Vehicle-mounted reverse circulation engineering drilling rig hydraulic pump is separated with diesel engine, so that power plant volume is big, power is low, and increases
The consumption of energy, for this purpose, in designing all-hydraulic vehicle-mounted reverse circulation engineering drilling rig hydraulic system, by diesel engine and hydraulic pressure
Pump combines, i.e., is combined oil pump shaft with diesel engine drives axis, and a transmission main shaft is formed, to form the hydraulic pressure attached together
Source.It improves the power density of power plant, and power significantly improves, and energy-saving effect is apparent.
Power head feeds Hydraulic Circuit Design, and traditional vehicle-mounted reverse circulation engineering drilling rig is in pile foundation hole production, power head
Drilling feeding especially cannot achieve pressurization feeding to different geology bad adaptabilities by dead weight, percussion drilling to harder soil property
Movement, to limit the application range of clean-out machine.All-hydraulic vehicle-mounted reverse circulation engineering drilling rig hydraulic system feeds circuit
Use pump control load sensitive system, to power head feed speed and feed pressure can real-time monitoring, feed loop hydraulic
System principle is as shown in the figure.
Power head feeding hydraulic circuit is mainly by pump, surge guide's multiple directional control valve YW3 and the double dynamical liquid that is arranged symmetrically
Compressing cylinder, self-adjustable afflux flow divider composition.Double-power hydraulic oil cylinder is arranged symmetrically when can reduce pressurization feed to the curved of drilling rod
Square improves hole quality, more energy-efficient.It pumps, guide's multiple directional control valve YW3 that surges, self-adjustable afflux flow divider, check valve
A pump control load sensitive system is formed with overflow valve, to which power head feed speed and feed pressure can realize real-time tune
Control.
All-hydraulic vehicle-mounted reverse circulation engineering drilling rig hydraulic system feeding circuit and rotary loop share main pump, single-pump system knot
Structure is simple, at low cost, operation repair is easy, but when artificially changing feed pressure by throttle valve, can lead to hydraulic oil heating hair
Heat influences system effectiveness；Feed the demand of the pressure combination drilling process in circuit, it is desirable that can be in a wide range of interior adjusting, in this way
A large amount of spill losses can be formed, therefore, main pump selects limit when designing all-hydraulic vehicle-mounted reverse circulation engineering drilling rig hydraulic system
Pressure type variable double-piston pump reduces spill losses.
When pressurization drilling, controls guide's multiple directional control valve YW3 that surges and be in upper, main pump passes through self-adjustable collection flow point at this time
Valve is flowed respectively to hydraulic cylinder fuel feeding, by control main pump and self-adjustable afflux flow divider, it can be achieved that the adjusting of feed pressure；
Decompression drilling when, control surge guide's multiple directional control valve YW3 be in bottom, at this time hydraulic oil by self-adjustable afflux flow divider into
To the rod chamber of hydraulic cylinder, to form upward power, the dead weight of a drilling tool part is offset；When floating feed, guide of surging is more
Way reversing valve YW3 is in middle position, and hydraulic cylinder is in unloading condition, to realize the movement of drill rod floating drilling；By check valve
The hydraulic lock of composition, for ensureing the normal work of drilling rod；Change the guide's multi-way reversing that surges by hydraulic control guiding manual valve
The position of valve YW3, to change rod boring direction.
Vacuum pump and slush pump Hydraulic Circuit Design, main function of the slush pump in power head drives drilling machine drilling work
It is to reduce the frictional force of drilling rod and hole wall to lubricate drilling rod in drilling rod internal circulation flow by mud, brill can also be cooled down
Head；The a large amount of boring muds generated in drilling process can be portalled outside by circulating mud fast speed belt.Vacuum pump main function be
When power head drives drilling rod to start to creep into work, make to be formed vacuum in drilling rod to promote mud Rapid Circulation stream in drilling rod
It is dynamic, a large amount of boring muds generated in drilling process are portalled outside by circulating mud fast speed belt with the cooperation of mud pump motor, are contracted significantly
The short work period, improve drilling efficiency.
Slush pump is mainly made of main pump, valve, mud motor and vacuum motor with vacuum pump hydraulic circuit system.Main pump is
Limited pressure variable double-piston pump has load-sensitive characteristic, pumps and is shared by vacuum motor and mud motor；Valve is elder generation of surging
Multiple directional control valve OW is led, changes the position for guide's multiple directional control valve OW that surges by hydraulic control guiding manual valve, it can be real respectively
Existing vacuum pump and mud pump work.Main pump, surge guide multiple directional control valve OW2, check valve, overflow valve, vacuum motor and mud
Slurry motor composition complex liquid pushes back path control system, so as to realize mud pumping hydraulic control system output rotating speed and torque
It adjusts as needed, meets various drilling condition requirements.
Vacuum pump has used pump control load sensitive system and vacuum pump and the compound hydraulic pressure of slush pump with slush pump hydraulic circuit
Control technology.Mud air pump inoperative when in view of vacuum pump work, vacuum air pump inoperative when mud pump work, so in design
Vacuum pump loop and mud pump loop share a pump, can improve the power efficiency of power plant in this way, reduce spill losses.
Valve is dynamic guide multiple directional control valve OW, and valve is shared for vacuum pump and mud pump loop herein, not due to slush pump and vacuum pump
Reversion, so controlling the start and stop of vacuum pump and slush pump using three six-way valves, such design of Hydraulic System has without overflowing
Stream and restriction loss, the advantages that pump amount is electrodeless adjustable, energy-saving effect is apparent.Vacuum pump and the pump control in slush pump hydraulic circuit are negative
It is similar to power head revolution hydraulic circuit to carry sensory system, can realize mud pumping hydraulic control system output rotating speed and torque
It adjusts as needed, meets various drilling condition requirements.
The all-hydraulic vehicle-mounted engineering driller operating condition of reacting cycle is generally relatively severe, therefore, it is necessary to have mobile convenient removal,
Mobility strong, the firm energy of support, can adapt to the road of various conditions, the non-cutting times such as on-site installation work are short.Crawler travel
Hydraulic Circuit Design must satisfy:（1）Can straight line moving, and when straight line moving keep synchronize；（2）Drilling machine is wanted can be narrow
Road pivot stud；（3）Drilling machine can on the road with certain slope steadily halt.
In the vehicle-mounted engineering driller hydraulic system of all-hydraulic reacting cycle, the left and right walking of crawler belt is respectively by one group of hydraulic control guide
Hand-operated valve control surge guide's multiple directional control valve OW2,3 realize that hydraulic control guiding manual valve is by an auxiliary pump confession in treble pump
Oil can effectively reduce spill losses in this way, improve the control mobility of drilling machine.Due to right walking loop and slush pump（Or it is true
Sky pump）Circuit will not work at the same time, and left walking loop is turned round with power head（Or feed）Circuit will not work at the same time, therefore, right
Walking loop shares a pump with slush pump and vacuum pump loop, and left walking loop is turned round with power head（Or feed）Circuit shares
One pump, it is uncoordinated and assignment of traffic is uneven asks for double motor rotation pressure that such double oil pump systems can solve single oil pump
Topic, and the running motor composition with circuits such as parking automatic self-locking, overload protections is had chosen, efficiently solve ramp parking
The problems such as.
Engineering driller power head uses the LUDV valves with distribution of load independent flow into rotary loop is given
Then post-compensation load sensitive system determines vacuum pump hydraulic control circuit, slush pump hydraulic control circuit, crawler belt row respectively
Walk hydraulic control circuit etc..Then traditional design method is used, it is determined that the parameter of engineering driller hydraulic control system, and it is right
Main Hydraulic Elements have carried out type selecting.The engineering driller hydraulic control system design is reasonable, control is easy, energy-efficient, and
With good mobility.
Claims (7)
1. a kind of hydraulic system for all hydraulic caterpillar reverse circulation engineering drilling rig is mounted on all hydraulic caterpillar reacting cycle
On engineering driller, it is characterised in that：The hydraulic system includes
Hydraulic station comprising fuel tank, active force element and/or secondary dynamical element；Wherein, active force element includes main import setting
It is connected on the mistake between Main Hydraulic Pump group (3) outlet and fuel tank in fuel tank and by the Main Hydraulic Pump group (3) of motor (4) driving, side
Carry protection valve (12)；Secondary dynamical element includes that the secondary hydraulic pump (29) being arranged in fuel tank with import, side are connected on secondary hydraulic pump
(29) safety valve between outlet and fuel tank；
The hydraulic system further includes and more than one following hydraulic system,
Power head feeds hydraulic system comprising power head feed cylinder (19) and power head feeding control multi-way valve (24)；
Wherein, power head feeding control (24) one import of multi-way valve and Main Hydraulic Pump group (3) outlet, power head feeding control multichannel
Valve (24) another import is connected to fuel tank by oil return line；Power head feeding control multi-way valve (24) one outlet with power head into
To the rodless cavity connection of oil cylinder (19), another outlet of control multi-way valve (24) and power head feed cylinder (19) are fed in power head
Rod chamber between be provided with flow divider-combiner (20)；
Power head Hydraulic slewing system comprising power head rotary motor (18) and power head revolution control multi-way valve (23),
Wherein, power head revolution control (23) one import of multi-way valve and Main Hydraulic Pump group (3) outlet, power head revolution control multichannel
Valve (23) another import is connected to fuel tank by oil return line；Power head revolution control multi-way valve (23) one outlet is returned with power head
The Single port connection for turning motor (18) turns round another outlet of control multi-way valve (23) and power head rotary motor (18) in power head
Another port between be provided with speed governing valve；
Vacuum pump and slush pump composite hydraulic system comprising the vacuum pump hydraulic system being arranged in parallel and slush pump hydraulic pressure system
System；
Wherein, vacuum pump hydraulic system includes vacuum pump control multi-way valve (11), vaccum pump motor (17) and check valve
(13)；Vacuum pump controls (11) one import of multi-way valve and Main Hydraulic Pump group (3) outlet, and it is another that vacuum pump controls multi-way valve (11)
One import is connected to fuel tank by oil return line；The outlet of vacuum pump control multi-way valve (11) divides two-way, passes through shut-off valve all the way
With the inlet communication of vaccum pump motor (17), another way is connected to fuel tank by oil return line by check valve (13), vacuum pump
The outlet of motor (17) is connected to fuel tank by oil return line by check valve；
Mud pump hydraulic system include slush pump control multiple directional control valve (10), mud pump motor (16), shut-off valve (14) and
Counterbalance valve (15)；Slush pump controls (10) one import of multiple directional control valve and Main Hydraulic Pump group (3) outlet, and slush pump control is more
Way reversing valve (10) another import is connected to fuel tank by oil return line；The outlet of vacuum pump control multi-way valve (11) passes through cut-off
The outlet of the inlet communication of valve (14) and mud pump motor (16), mud pump motor (16) is passed through by counterbalance valve (15) with fuel tank
Oil return line is connected to；
Complete machine vibration hydraulic system comprising the left vibration hydraulic system being arranged in parallel and right vibration hydraulic system；
Wherein left vibration hydraulic system includes right travelling control multi-way valve (9) and right running motor (21)；Right travelling control is more
(9) one import of road valve and Main Hydraulic Pump group (3) outlet, another import of right travelling control multi-way valve (9) is with fuel tank by returning
Oil pipe line is connected to；The outlet of right travelling control multi-way valve (9) one is connected to the Single port of right running motor (21)；Right travelling control is more
Another outlet of road valve (9) is connected to the another port of right running motor (21)；
Right vibration hydraulic system includes left running motor (22) and left travelling control multi-way valve (25)；Left travelling control multichannel
(25) one import of valve and Main Hydraulic Pump group (3) outlet, another import of left travelling control multi-way valve (25) is with fuel tank by returning
Oil pipe line is connected to；The outlet of left travelling control multi-way valve (25) one is connected to the Single port of left running motor (22)；Left travelling control
Another outlet of multi-way valve (25) is connected to the another port of left running motor (22)；
Hoisting hydraulic system comprising left hoisting hydraulic system and left hoisting hydraulic system connection structure
Identical right hoisting hydraulic system；Left hoisting hydraulic system includes that hoist motor (33) and left rolling control are more
Road valve (31)；(31) one import of left rolling control multi-way valve and secondary hydraulic pump (29) outlet, left rolling control multi-way valve
(31) another import is connected to fuel tank by oil return line；The outlet of left rolling control multi-way valve (31) one passes through pipeline L and elevator
The Single port of motor (33) is connected to；Another outlet of left rolling control multi-way valve (31) is another by pipeline l and hoist motor (33)
Single port is connected to；
Complete machine Hydraulic slewing system comprising vehicle rotary motor (35) and vehicle revolution control multi-way valve (43)；Vehicle returns
Turn control (43) one import of multi-way valve and secondary hydraulic pump (29) outlet, vehicle revolution control multi-way valve (43) another import with
Fuel tank is connected to by oil return line；Vehicle revolution control multi-way valve (43) one outlet and the Single port of vehicle rotary motor (35) connect
It is logical；Another outlet of vehicle revolution control multi-way valve (43) is connected to the another port of vehicle rotary motor (35)；It is turned round in vehicle
It is provided with shut-off valve on a pipeline between control multi-way valve (43) and vehicle rotary motor (35)；
Landing leg stretching hydraulic system comprising landing leg stretching oil cylinder (39) and landing leg stretching control multi-way valve (40)；Supporting leg is stretched
Contracting control (40) one import of multi-way valve and secondary hydraulic pump (29) outlet, landing leg stretching control multi-way valve (40) another import with
Fuel tank is connected to by oil return line；Landing leg stretching controls the outlet of multi-way valve (40) one and connects with landing leg stretching oil cylinder (39) rodless cavity
Logical, another outlet of landing leg stretching control multi-way valve (40) is connected to landing leg stretching oil cylinder (39) rod chamber；
Supporting leg hydraulic system for lifting comprising hydraulic lock (37), supporting leg lifting cylinder (38) and supporting leg elevating control multi-way valve
(41)；One inlet communication of secondary hydraulic pump (29) and supporting leg elevating control multi-way valve (41), fuel tank and supporting leg elevating control multichannel
One inlet communication of valve (41), hydraulic lock (37) are arranged in the outlet of supporting leg elevating control multi-way valve (41) and supporting leg lifting cylinder
(38) between；
Rack hydraulic system for lifting comprising rack lift ram (36) and rack rising and dropping control multi-way valve (42).
2. the hydraulic system according to claim 1 for all hydraulic caterpillar reverse circulation engineering drilling rig, it is characterised in that:
This hydraulic system further includes
Cooling hydraulic system comprising the cooling pump and cooling pump outlet that its import is connected to fuel tank by oil return line
Pipeline N, parallel connection and the other overflow valve (27) being connected between pipeline N and fuel tank with 2/2-way multi-way valve (28) and with pipe
The cooling unit (5) of road N primary outlets connection.
3. the hydraulic system according to claim 1 for all hydraulic caterpillar reverse circulation engineering drilling rig, it is characterised in that:
Hydraulic station further includes being separately positioned on Main Hydraulic Pump group (3) between fuel tank and/or secondary hydraulic pump (29) is between fuel tank
Butterfly valve (2) is arranged in the hydraulic oil filter (8) in Main Hydraulic Pump group (3) exit and/or secondary hydraulic pump (29) exit, sets
It sets the oil return integrated package (6) on tank drainback pipeline, the return filter in oil return integrated package (6) between fuel tank is set
(1), the pressure gauge on pipeline (7).
4. the hydraulic system according to claim 1 for all hydraulic caterpillar reverse circulation engineering drilling rig, it is characterised in that:
Power head revolution control multi-way valve (23) is three six logical pilot operated valve devices, and power head revolution controls position off-load in multi-way valve (23)；
It is provided with check valve between power head revolution control (23) one import of multi-way valve and Main Hydraulic Pump group (3) outlet；
Power head feeding control multi-way valve (24) is three six logical pilot operated valve devices, and power head feeding controls position in multi-way valve (24) and unloads
Lotus；It is fed in power head and is provided with check valve between control (24) one import of multi-way valve and Main Hydraulic Pump group (3) outlet.
5. the hydraulic system according to claim 1 for all hydraulic caterpillar reverse circulation engineering drilling rig, it is characterised in that:
It is three-position five-way pilot operated valve that vacuum pump, which controls multi-way valve (11) with slush pump control multiple directional control valve (10), and vacuum pump controls multichannel
Valve (11) and position off-load in slush pump control multiple directional control valve (10)；In vacuum pump control (11) one import of multi-way valve and main hydraulic pressure
Pump group (3) is provided with check valve between outlet；Go out with Main Hydraulic Pump group (3) in slush pump control (10) one import of multiple directional control valve
It is provided with check valve between mouthful.
6. the hydraulic system according to claim 1 for all hydraulic caterpillar reverse circulation engineering drilling rig, it is characterised in that:
The shuttle valve (32) in parallel with hoist motor (33) is connected between pipeline L and pipeline l；Hoist motor (33) carries damper；
It is connected with check valve pipeline (30) and sequence valve (34) between the outlets pipeline L and the Single port of hoist motor (33), it is suitable
The control mouth of sequence valve (34) is connected to pipeline l；
Right travelling control multi-way valve (9), left travelling control multi-way valve (25), left rolling control multi-way valve (31), landing leg stretching control
Multi-way valve (40) processed, vehicle revolution control multi-way valve（43）, rack rising and dropping control multi-way valve (42) and supporting leg elevating control it is more
Road valve (41) structure is identical.
7. the hydraulic system according to claim 1 for all hydraulic caterpillar reverse circulation engineering drilling rig, it is characterised in that:
In right travelling control multi-way valve (9), left travelling control multi-way valve (25), left rolling control multi-way valve (31), landing leg stretching control
Multi-way valve (40), vehicle revolution control multi-way valve（43）, rack rising and dropping control multi-way valve (42) and supporting leg elevating control multichannel
Corresponding pilot valve (26) is respectively arranged on valve (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820058785.1U CN207879739U (en) | 2018-01-15 | 2018-01-15 | Hydraulic system for all hydraulic caterpillar reverse circulation engineering drilling rig |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820058785.1U CN207879739U (en) | 2018-01-15 | 2018-01-15 | Hydraulic system for all hydraulic caterpillar reverse circulation engineering drilling rig |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108223467A (en) * | 2018-01-15 | 2018-06-29 | 河北工程大学 | For the hydraulic system of all hydraulic caterpillar reverse circulation engineering drilling rig |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108223467A (en) * | 2018-01-15 | 2018-06-29 | 河北工程大学 | For the hydraulic system of all hydraulic caterpillar reverse circulation engineering drilling rig |
| CN108223467B (en) * | 2018-01-15 | 2023-05-30 | 河北工程大学 | Hydraulic system for full-hydraulic crawler-type reverse circulation engineering driller |
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