CN108457920B - A kind of anti-deflection control method - Google Patents
A kind of anti-deflection control method Download PDFInfo
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- CN108457920B CN108457920B CN201810169847.0A CN201810169847A CN108457920B CN 108457920 B CN108457920 B CN 108457920B CN 201810169847 A CN201810169847 A CN 201810169847A CN 108457920 B CN108457920 B CN 108457920B
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- pressure
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- signal
- intrinsic factor
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Classifications
-
- 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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B1/00—Percussion drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B1/00—Percussion drilling
- E21B1/02—Surface drives for drop hammers or percussion drilling, e.g. with a cable
-
- 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
-
- 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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
Abstract
The present invention relates to field of hydraulic control, specifically a kind of anti-deflection control method, by carrying out real-time monitoring, acquisition to propelling pressure, rotation pressure, impact opening intrinsic factor signal, declination control system integrated environment factor and pressure signal carry out acting accordingly in time to prevent the hole scattering that the influence in drilling process because of propulsive force generates by control solenoid valve.
Description
The application is a kind of divisional application of application for a patent for invention " anti-deflection rock drilling control system ".
The original bill applying date: 2016-09-27.
Original bill application number: 2016108513014.
A kind of original bill denomination of invention: anti-deflection rock drilling control system.
Technical field
The present invention relates to field of hydraulic control, specifically a kind of anti-deflection control method.
Background technique
Since rock drilling drilling blasting technique is the main means of tunnel piercing and mining, as important equipment
Hydraulic gate has obtained extensive development and application.But during rock drill impact drilling by drill rod institute's stress and
Torque causes the deflection during rock drilling, so as to cause blasthole failure, causes huge harm in the process to rock drilling.In order to prevent
Rock drill hole scattering, the control for mainly influencing propulsive force on declination control both at home and abroad have carried out certain research, but these
Control system is entirely the effect that some simple hydraulic valve prosecutor cases are extremely difficult to prevention declination control.
Summary of the invention
In view of this, the present invention provides a kind of anti-deflection control methods, by propelling pressure, rotation pressure, impact
Hole intrinsic factor signal carries out real-time monitoring, acquisition, declination control system integrated environment factor and pressure signal, by controlling electromagnetism
Valve carries out acting accordingly to prevent the hole scattering generated in drilling process by the influence of propulsive force in time.
A kind of anti-deflection rock drilling control system, the executing agency being connect including power mechanism and respectively with power mechanism, control
Valve processed, electrical system, in which:
Executing agency includes propulsion cylinder, hydraulic motor and beater mechanism；
Control valve include three-position four-way electromagnetic directional valve, two position, three-way electromagnetic change valve, pilot operated compound relief valve, check valve,
Proportional throttle valve, propelling pressure control valve promote counterbalance valve, filter and cooler, and pilot operated compound relief valve is other respectively to be connect in master
In oil circuit, the oil pressure of working connection is limited；The inlet pressure of propelling pressure control valve adjusting propulsion cylinder；By adjusting check valve and ratio
Example electromagnetism valve regulation control propulsion cylinder imports and exports flow；The outlet pressure of propulsion cylinder is controlled by adjusting back pressure valve regulation；Pass through
It adjusts solenoid directional control valve and realizes moving forward and backward for propulsion cylinder；The positive and negative rotation of hydraulic motor is realized by adjusting solenoid directional control valve；
The reciprocating impact of beater mechanism is realized by adjusting solenoid directional control valve；
Electrical system include pressure sensor, signal amplifier, signal amplifier group, signal processor, data collecting card,
Hole intrinsic factor monitoring system, hole intrinsic factor and declination control system, pressure sensor are separately positioned on propulsion cylinder and hydraulic motor
Import and export, the pressure parameter of its position is acquired by pressure sensor and is transferred to data collecting card；In through hole
Factor monitors changing factor in the hole of system monitoring rock drilling process, and signal collected is sent to hole intrinsic factor, hole intrinsic factor
Signal collected and possessed empirical data comparison are handled, declination control system is by obtained pressure parameter and is acquired
Hole intrinsic factor carry out comprehensive judgement obtain most suitable propelling pressure, then to solenoid directional control valve, proportional throttle valve and propulsion
Counterbalance valve is regulated and controled, and oil cylinder propulsive force is obtained, and rock drill drill steel is avoided to cause in drilling process because of the influence of propulsive force
Deflection.
The power mechanism includes fuel tank, motor and the one-way pump being connected to motor, by motor driven one-way pump, to
Propulsion cylinder, hydraulic motor and beater mechanism fuel feeding.
The control valve includes three-position four-way electromagnetic directional valve, two position, three-way electromagnetic change valve, pilot operated compound relief valve, unidirectional
Valve, propelling pressure control valve, promotes counterbalance valve, filter and cooler at proportional throttle valve；Wherein:
The working hole of overflow valve is communicated with the working hole of check valve, fuel tank respectively, the working hole of solenoid directional control valve and unidirectional
The working hole of valve communicates；The working hole of propelling pressure control valve and the working hole of check valve are in parallel, and respectively with solenoid directional control valve
Working hole communicate；The working hole of propelling pressure control valve is communicated with the import of propulsion cylinder；Non-return valve operational mouth and ratio throttle
The working hole of valve communicates；The working hole of proportional throttle valve is in parallel with the working hole of counterbalance valve is promoted, and communicates with propulsion cylinder outlet；
The working hole of solenoid directional control valve is communicated with the working hole of counterbalance valve is promoted；The working hole of filter respectively with fuel tank, cooler
Working hole communicates, and the working hole of solenoid directional control valve is communicated with the working hole of cooler, the working hole of hydraulic motor and propulsion cylinder
Working hole is in parallel, and communicates with the working hole of solenoid directional control valve, the working hole phase of the working hole and hydraulic motor of solenoid directional control valve
Logical, the working hole of pilot operated compound relief valve is communicated with fuel tank, and the working hole of pilot operated compound relief valve and the working hole of pump are in parallel, and with electricity
The import of the working hole and beater mechanism of magnetic reversal valve communicates；The working hole of solenoid directional control valve is communicated with the outlet of beater mechanism,
The working hole of filter is communicated with the working hole of fuel tank, cooler respectively, the working hole of cooler and the work of solenoid valve reversal valve
It is communicated as mouth.
The propelling pressure control valve includes check valve, three-way pressure reducing valve, threeway overflow valve and pressure master cylinder；Wherein:
The working hole of check valve and the working hole of three-way pressure reducing valve are in parallel, the working hole as propelling pressure control valve；Pressure
The working hole of power master cylinder is in parallel with the working hole of the working hole of three-way pressure reducing valve and check valve respectively, controls as propelling pressure
The working hole of valve；The working hole of three-way pressure reducing valve is communicated with threeway overflow valve working hole, the working hole and fuel tank of three-way pressure reducing valve
It communicates and constitutes internal drainage road, threeway overflow valve working hole communicates with fuel tank, the working hole of pressure master cylinder and solenoid directional control valve
Working hole communicates.
The propulsion counterbalance valve is formed in parallel by check valve, ratio electromagnetic relief valve, working hole and the ratio electricity of check valve
The working hole of magnetic overflow valve is in parallel, and as the working hole for promoting counterbalance valve, the working hole of the working hole of check valve and overflow valve is simultaneously
Connection, as the working hole for promoting counterbalance valve.
The electrical system includes pressure sensor, signal amplifier, signal amplifier group, signal processor, data
Capture card, hole intrinsic factor monitoring system, hole intrinsic factor and declination control system, pressure sensor are separately positioned on the work of propulsion cylinder
Make mouth, at hydraulic motor working hole；Hole intrinsic factor monitoring system is distributed in rock drilling system, and signal amplifier receives pressure sensing
The pressure signal of device and amplification, the signal of the amplified signal of signal processor processes, data gather computer card acquisition process；Pass through
Hole intrinsic factor monitors changing factor in the hole of system monitoring rock drilling process, is sent to hole intrinsic factor, hole internal cause for signal collected
Element handles signal collected and possessed empirical data comparison, and declination control system is by obtained pressure parameter and is adopted
The hole intrinsic factor of collection carries out comprehensive judgement and makes the corresponding solenoid valve of declination control Decision Control.
The beneficial effects of the present invention are: to propelling pressure, rotation pressure, rock drilling hole intrinsic factor signal carry out real-time monitoring,
The working condition of rock drill is grasped in acquisition in real time, and compared with existing feeding force control system, the system response is sensitiveer, ginseng
It examines governing factor more comprehensively, effectively conventional hydraulic and control system is combined, can more effectively be avoided because of propulsive force
Influence caused by dig into deflection situation.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of anti-deflection rock drilling control system of the invention.
In figure, M1, M2 are motor, and B1, B2 are one-way pump, and E1, E2 are filter, and L1, L2 are cooler.H1, H2 tri-
Position four-way electromagnetic reversing valve, H3 are two position, three-way electromagnetic change valve, and Y1, Y5 are pilot operated compound relief valve, and Y2 is threeway overflow valve, Y3
It is ratio electromagnetic relief valve for three-way pressure reducing valve, Y4, D1, D2, D3, D4 are check valve, and J is proportional throttle valve, and G is pressure control
Valve, R are propulsion cylinder, and N1 is propelling pressure control valve, N2 is that promote by pressure valve, Z be rock drilling system, and 1 is rock, and 2 be drill steel, S
Beater mechanism, M are hydraulic motor, and P1, P2, P3, P4 are pressure sensor, and A1, A2 are signal amplifier, A3 is signal amplifier
Group, F1, F2 are signal processor, C is data gather computer card, and I is that factor monitors system in hole, and Q is hole intrinsic factor, and K is deflection
Control system.
Specific embodiment
The present invention will now be described in detail with reference to the accompanying drawings and examples.
As shown in Fig. 1, a kind of anti-deflection rock drilling control system of the invention, it includes power mechanism, executing agency, control
Valve processed, electrical system；Wherein:
Power mechanism includes fuel tank, one-way pump B1, B2 and motor M1, M2.From motor M1, M2 drive one-way pump B1, B2 to
System supplies hydraulic oil；
Control valve includes three-position four-way electromagnetic directional valve H1, H2, two position, three-way electromagnetic change valve H3, pilot operated compound relief valve
Proportional throttle valve J, Y1, Y5, check valve D1, D3 propelling pressure control valve N1, promote counterbalance valve N2, filter E1, E2, cooling
Device L1, L2.Pilot operated compound relief valve is other respectively to be connect in working connection, and the oil pressure of working connection is limited；Propelling pressure control valve N1 passes through
The inlet pressure of itself control propulsion cylinder R, declination control system K are controlled by the switching value size of comparative example throttle valve J,
To control the inlet and outlet flow of propulsion cylinder R, to control the speed of propulsion cylinder R, anti-deflection control system K passes through comparative example overflow
Valve Y4 controls the outlet back pressure power of propulsion cylinder R.Moving forward and backward for propulsion cylinder is realized by adjusting solenoid directional control valve H1；Pass through
Adjust the positive and negative rotation that solenoid directional control valve H2 realizes hydraulic motor；The reciprocal fortune of beater mechanism is realized by adjusting solenoid directional control valve H3
It is dynamic.
Electrical system include four groups of pressure sensors P1, P2, P3, P4, signal amplifier A1, A2, signal amplifier group A3,
Signal processor F1, F2, data collecting card C, hole intrinsic factor monitor system I, hole intrinsic factor Q, declination control system K, by right
Inlet and outlet placement sensor P1, P2, P3, P4 of propulsion cylinder and hydraulic motor acquire the pressure parameter of its position and are transferred to
Data collecting card C；Through hole intrinsic factor monitors changing factor in the hole of system I monitoring rock drilling process, by signal collected transmission
To hole intrinsic factor Q, hole intrinsic factor Q handles signal collected and possessed empirical data comparison, and declination control system K will
Obtained pressure parameter and intrinsic factor Q in hole collected carry out comprehensive judgement and obtain most suitable propelling pressure, then to electromagnetism
Reversal valve H1, H2, H3, proportional throttle valve J and propulsion counterbalance valve N2 are regulated and controled, and optimal oil cylinder propulsive force is finally obtained, from
And be effectively prevented from rock drill drill steel in drilling process due to the influence of propulsive force caused by deflection.
Overall work process:
Pressure sensor P1, P2, P3, P4 be separately mounted to working hole P, T of propulsion cylinder R, hydraulic motor working hole P,
T.Signal amplifier A1 receives the signal of pressure sensor P1, P2, and signal amplifier A2 receives the letter of pressure sensor P3, P4
Number, signal processor F1, F2 handle the signal after amplified signal, data collecting card C acquisition process；Through hole intrinsic factor prison
Examining system I monitors changing factor in the hole of rock drilling process, is sent to hole intrinsic factor Q for signal collected, hole intrinsic factor Q will be adopted
The signal of collection and possessed empirical data comparison processing, declination control system K is by obtained pressure parameter and hole collected
Intrinsic factor Q carries out comprehensive judgement and makes the corresponding solenoid valve of declination control Decision Control.
Declination control system receives the pressure signal and warp of data collecting card collected pressure sensor P1, P2, P3, P4
When via hole intrinsic factor monitors the hole intrinsic factor of system I monitoring rock drilling process, by the pressure signal monitored and hole intrinsic factor signal
It is compared with signal when normal rock drilling, can obtain three kinds of results: (1) it is normal to dig into state for rock drill.(2) rock drill digs into pine
Incompetent bed.(3) rock drill, which is dug into, lures inclined rock stratum.
Rock drill dig into state it is normal when, declination control system K does not issue new regulation and control instruction, anti-deflection rock drilling control system
System still keeps present working condition.
When rock drill digs into weak stratum, drill bit steering resistance reduces, and rotation pressure reduces.Processing scheme: work as rock drilling
When the propelling pressure and rotation pressure of machine reduce suddenly, propulsion control valve N2 can be automatically increased propulsion cylinder inlet pressure, while partially
Oblique control system K reduces immediately the opening flow of proportional throttle valve J, reduces the pressure of proportional pressure control valve Y2, exports propulsion cylinder
Back pressure and flow reduce, compensation to propulsion cylinder import is realized, so that the propelling pressure of propulsion cylinder R be enable accurately to increase
While can increase fltting speed, while increasing the switching times of solenoid directional control valve H3 to increase beater mechanism frequency of impact, this
Sample can improve the efficiency of rock drill.
When rock drill, which is dug into, lures inclined rock stratum, drill bit steering resistance increases, and rotation pressure increases.Processing scheme: work as rock drilling
When the propelling pressure and rotation pressure of machine increase suddenly, propulsion control valve N2 can reduce propulsion cylinder inlet pressure automatically, prevent simultaneously
The opening flow of declination control system K scaling up throttle valve J immediately, the pressure of scaling up overflow valve Y2 go out propulsion cylinder
The back pressure and flow of mouth increase, so that the propelling pressure of propulsion cylinder R can reduce fltting speed while capable of accurately reducing, together
When reduce the switching times of solenoid directional control valve H3 to reduce the frequency of impact of beater mechanism, thus can effectively prevent to dig into
The case where deflection.
Generally prevention digs into deflection while also improving the efficiency of rock drill Drilling well.
Claims (1)
1. a kind of anti-deflection control method,
It is characterized in that,
Pressure sensor P1, P2, P3, P4 are separately mounted to working hole P, T of working hole P, T of propulsion cylinder R, hydraulic motor；Letter
Number amplifier A1 receives the signal of pressure sensor P1, P2, and signal amplifier A2 receives the signal of pressure sensor P3, P4, letter
Number processor F1, F2 handle the signal after amplified signal, data collecting card C acquisition process；Through hole intrinsic factor monitoring system
The I that unites monitors changing factor in the hole of rock drilling process, is sent to hole intrinsic factor Q for signal collected, hole intrinsic factor Q will be collected
Signal and possessed empirical data comparison processing, declination control system K is by obtained pressure parameter and hole internal cause collected
Plain Q carries out comprehensive judgement and makes the corresponding solenoid valve of declination control Decision Control；
Declination control system receives the pressure signal of data collecting card collected pressure sensor P1, P2, P3, P4 and through via hole
When intrinsic factor monitors the hole intrinsic factor of system I monitoring rock drilling process, by the pressure signal monitored and hole intrinsic factor signal and just
Signal when normal rock drilling compares, and can obtain three kinds of results:
(1) it is normal to dig into state for rock drill
Declination control system K does not issue new regulation and control instruction, and anti-deflection rock drilling control system still keeps present working condition；
(2) rock drill digs into weak stratum
Drill bit steering resistance reduces, and rotation pressure reduces；Processing scheme: when the propelling pressure of rock drill drops suddenly with rotation pressure
When low, propulsion control valve N2 can be automatically increased propulsion cylinder inlet pressure, while declination control system K reduces immediately proportional throttle valve
The opening flow of J reduces the pressure of proportional pressure control valve Y2, and the back pressure and flow for exporting propulsion cylinder reduce, and realizes to propulsion
The compensation of cylinder import increases simultaneously to can increase fltting speed while so that the propelling pressure of propulsion cylinder R is accurately increased
The efficiency of rock drill thus can be improved to increase beater mechanism frequency of impact in the switching times of solenoid directional control valve H3；
(3) rock drill, which is dug into, lures inclined rock stratum
Drill bit steering resistance increases, and rotation pressure increases；Processing scheme: when the propelling pressure of rock drill increases suddenly with rotation pressure
When big, propulsion control valve N2 can reduce propulsion cylinder inlet pressure automatically, while declination control system K scaling up throttle valve immediately
The opening flow of J, the pressure of scaling up overflow valve Y2, the back pressure and flow for exporting propulsion cylinder increase, thus propulsion cylinder R
Propelling pressure can reduce fltting speed while can accurately reduce, while reducing the switching times of solenoid directional control valve H3 to subtract
The frequency of impact of small beater mechanism thus can effectively prevent the case where digging into deflection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810169847.0A CN108457920B (en) | 2016-09-27 | 2016-09-27 | A kind of anti-deflection control method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810169847.0A CN108457920B (en) | 2016-09-27 | 2016-09-27 | A kind of anti-deflection control method |
| CN201610851301.4A CN106351900B (en) | 2016-09-27 | 2016-09-27 | A kind of anti-deflection rock drilling control system |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610851301.4A Division CN106351900B (en) | 2016-09-27 | 2016-09-27 | A kind of anti-deflection rock drilling control system |
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| Publication Number | Publication Date |
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| CN108457920A CN108457920A (en) | 2018-08-28 |
| CN108457920B true CN108457920B (en) | 2019-10-18 |
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| CN201810169847.0A Active CN108457920B (en) | 2016-09-27 | 2016-09-27 | A kind of anti-deflection control method |
| CN201810130113.1A Active CN108252970B (en) | 2016-09-27 | 2016-09-27 | Anti- deflection control method |
| CN201610851301.4A Active CN106351900B (en) | 2016-09-27 | 2016-09-27 | A kind of anti-deflection rock drilling control system |
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| CN201810130113.1A Active CN108252970B (en) | 2016-09-27 | 2016-09-27 | Anti- deflection control method |
| CN201610851301.4A Active CN106351900B (en) | 2016-09-27 | 2016-09-27 | A kind of anti-deflection rock drilling control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108457920B (en) * | 2016-09-27 | 2019-10-18 | 罗春华 | A kind of anti-deflection control method |
| CN107143537B (en) * | 2017-05-19 | 2018-07-06 | 湖南文理学院 | A kind of hydraulic gate test hydraulic system |
| CN108194444B (en) * | 2018-03-20 | 2024-02-13 | 马鞍山唐拓凿岩机械有限公司 | Anti-idle-drilling hydraulic system of top hammer drilling machine and control method thereof |
| CN110284835B (en) * | 2019-07-25 | 2024-04-12 | 桂林航天工业学院 | Movable engineering driller |
| CN110374578A (en) * | 2019-08-09 | 2019-10-25 | 桂林航天工业学院 | One kind being used for hydraulic impact machine performance testing device |
| CN110345134A (en) * | 2019-08-09 | 2019-10-18 | 桂林航天工业学院 | A kind of device for hydraulic impact machine performance test |
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| CN203926192U (en) * | 2013-12-25 | 2014-11-05 | 广西恒日科技有限公司 | Rock drilling machine anti-sticking pricker system |
| CN103821451A (en) * | 2014-02-28 | 2014-05-28 | 金川集团股份有限公司 | Hydraulic control system of anti-clamping drill rod of rock drilling machine |
| CN104613033A (en) * | 2015-02-11 | 2015-05-13 | 阿特拉斯科普柯(南京)建筑矿山设备有限公司 | Tip hydraulic control system and drill jumbo thereof |
| CN204512026U (en) * | 2015-02-11 | 2015-07-29 | 阿特拉斯科普柯(南京)建筑矿山设备有限公司 | The anti-solution cavity card pricker system of drill jumbo |
| CN204646830U (en) * | 2015-03-13 | 2015-09-16 | 辽宁瑞丰专用车制造有限公司 | A kind of hydraulic system of rock drill |
| CN205478605U (en) * | 2016-04-15 | 2016-08-17 | 重庆格德瑞重工有限公司 | Rock drill hydraulic system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108457920A (en) | 2018-08-28 |
| CN108252970B (en) | 2019-11-01 |
| CN108252970A (en) | 2018-07-06 |
| CN106351900A (en) | 2017-01-25 |
| CN106351900B (en) | 2018-12-18 |
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