CN111677490B - Control system of dual-purpose drilling machine for water hammer and core drill and multifunctional drilling machine - Google Patents
Control system of dual-purpose drilling machine for water hammer and core drill and multifunctional drilling machine Download PDFInfo
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- CN111677490B CN111677490B CN202010567694.2A CN202010567694A CN111677490B CN 111677490 B CN111677490 B CN 111677490B CN 202010567694 A CN202010567694 A CN 202010567694A CN 111677490 B CN111677490 B CN 111677490B
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- 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
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
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- 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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
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- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention discloses a control system of a water hammer and core drilling dual-purpose drilling machine, which comprises: the power head control unit comprises a power head control oil circuit for controlling the power head to rotate, and the power head control oil circuit comprises branches corresponding to the water hammer and the coring respectively, and a power head reversing device which is connected with the branches and is used for switching different branches is arranged; the water supply control unit comprises a waterway for supplying water for a water hammer and coring, a hydraulic water pump is arranged in the waterway, two groups of speed and pressure regulating loops for regulating oil supply are connected with the hydraulic water pump, and a water supply reversing device for switching different speed and pressure regulating loops is arranged in connection with the speed and pressure regulating loops. The control system provided by the invention can realize the rapid switching of the dual-purpose drilling machine in the water hammer and coring modes, and is simple and convenient to operate. The invention also discloses a multifunctional drilling machine with the control system, and the multifunctional drilling machine also has the technical effects.
Description
Technical Field
The invention relates to the technical field of hydraulic control of multifunctional drilling rigs, in particular to a control system of a water hammer and core drilling dual-purpose drilling rig.
Background
The existing drilling machine control system can only meet single functional requirements, the water hammer is used as a novel down-the-hole drill, the application and control of the novel down-the-hole drill are fewer, the existing drilling machine is mostly an underground drilling machine and the matched control system design of the underground drilling machine are difficult to meet the requirements of the multifunctional drilling machine. When the water hammer and the coring operation are performed, the action of the propelling mechanism part can be commonly used, but when the water hammer is adopted for punching, the power required to be provided by the power head is low-speed large torque, and when the coring operation is performed, the power required to be provided by the power head is high-speed small torque. Meanwhile, the water hammer needs high-pressure and large-flow power water, and the coring needs low-pressure and small-flow flushing water.
In summary, how to effectively solve the problems that the existing control system is difficult to meet the requirements of water hammer and coring operation of the multifunctional drilling machine is a problem that needs to be solved by those skilled in the art at present.
Disclosure of Invention
In view of the above, a first object of the present invention is to provide a control system for a dual-purpose water hammer and core drill, which can effectively solve the problem that the existing control system is difficult to meet the requirements of water hammer and core drill operation of the multifunctional drill, and a second object of the present invention is to provide a multifunctional drill comprising the control system.
In order to achieve the first object, the present invention provides the following technical solutions:
a control system for a dual-purpose water hammer and core drill, comprising:
the power head control unit comprises a power head control oil circuit for controlling the power head to rotate, wherein the power head control oil circuit comprises branches corresponding to a water hammer and coring respectively, and a power head reversing device used for switching different branches is arranged in connection with the branches;
the water supply control unit comprises a water path for supplying water for a water hammer and coring, a hydraulic water pump is arranged in the water path, two groups of speed and pressure regulating loops for regulating oil supply are connected with the hydraulic water pump, and a water supply reversing device for switching different speed and pressure regulating loops is arranged and connected with the speed and pressure regulating loops.
Preferably, in the above control system, the speed and pressure regulating loop includes a water supply pressure reducing valve and a water supply speed regulating valve connected between the hydraulic water pump and the oil inlet, and the water supply reversing device includes an on-off valve connected to the speed and pressure regulating loop, and the reversing of the two speed and pressure regulating loops is realized by the action of the on-off valve.
Preferably, in the above control system, the control system further comprises a propeller control unit, the propeller control unit comprises a propulsion control oil path for controlling the propeller, a switch multi-way valve is arranged in the propulsion control oil path, the switch multi-way valve comprises a propulsion unit, and a propulsion pressure regulating valve is arranged between the propulsion unit and the propeller.
Preferably, in the above control system, the switch multi-way valve includes a water supply link, and the on-off valves of the two speed and pressure regulating loops are respectively connected with the water supply link, so as to change direction under the control of the switch multi-way valve.
Preferably, in the control system, the switch multiway valve is a manual valve, and handles of the water supply unit and the propulsion unit are positioning handles.
Preferably, in the control system, a check valve for returning oil is arranged in parallel with the propulsion pressure regulating valve.
Preferably, in the above control system, the hydraulic control system further comprises an anti-seizing control unit, wherein the anti-seizing control unit comprises an anti-seizing valve and a hydraulic control reversing valve which are connected in the propulsion control oil path, and the anti-seizing valve reverses when the rotation pressure of the power head is greater than the set pressure of the anti-seizing valve, and the hydraulic control reversing valve reverses.
Preferably, in the control system, a proportional multi-way valve for controlling forward and reverse rotation and rotation speed of the power head is arranged in the control oil path.
Preferably, in the control system, the proportional multi-way valve is a manual valve, and a handle of the manual valve is a positioning handle.
The control system of the water hammer and core drilling dual-purpose drilling machine provided by the invention comprises a power head control unit and a water supply control unit. The power head control unit comprises a power head control oil circuit for controlling the power head to rotate, the power head control oil circuit comprises branches respectively corresponding to the water hammer and the coring device, and a power head reversing device which is connected with the branches and used for switching different branches is arranged; the water supply control unit comprises a water path for supplying water for the water hammer and the coring, a hydraulic water pump is arranged in the water path, two groups of speed and pressure regulating loops for regulating the oil supply amount are arranged and connected with the hydraulic water pump, and a water supply reversing device for switching different speed and pressure regulating loops is arranged and connected with the speed and pressure regulating loops.
The control system of the water hammer and core drilling dual-purpose drilling machine provided by the invention is characterized in that the power head control unit and the water supply control unit respectively adopt different branches and speed and pressure regulating circuits, so that when the water hammer and core drilling working modes of the dual-purpose drilling machine are switched, the power head reversing device is directly switched to the corresponding branch so as to meet the corresponding rotating speed and torque requirements of the water hammer or the core drilling power head, and the water supply reversing device is switched to the corresponding speed and pressure regulating circuit so as to meet the corresponding water supply pressure and flow under the water hammer or the core drilling. In conclusion, through the structure, the dual-purpose drilling machine can be rapidly switched between the water hammer mode and the coring mode, and the operation is simple and convenient. Meanwhile, the control system can adopt full hydraulic control, is low in cost, simple and reliable, and is convenient for field installation and maintenance.
In order to achieve the second object, the invention also provides a multifunctional drilling machine, which comprises any one of the control systems. Because the control system has the technical effects, the multifunctional drilling machine with the control system has the corresponding technical effects.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a control system of a dual-purpose water hammer and core drill according to an embodiment of the present invention.
The figures are marked as follows:
the hydraulic control system comprises a proportional multi-way valve 1, a switch-type multi-way valve 2, a propulsion pressure regulating valve 3, an anti-jamming valve 4, a hydraulic control reversing valve 5, a water supply speed regulating valve 6, a water supply pressure reducing valve 7, an on-off valve 8 and a hydraulic water pump 9.
Detailed Description
The embodiment of the invention discloses a control system of a water hammer and core drilling dual-purpose drilling machine, which is convenient and quick to directly switch the working modes of the water hammer and the core drilling.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a control system of a dual-purpose water hammer and core drill according to an embodiment of the present invention.
In a specific embodiment, the control system of the water hammer and core drilling dual-purpose drilling machine provided by the invention comprises a power head control unit and a water supply control unit.
Wherein, to water hammer and core dual-purpose rig of coring in this application, because water hammer is different with the required rotational speed of core unit under the different modes of coring and moment of torsion, supply water volume and pressure are different, consequently corresponding main improvement setting is carried out to unit control unit and water supply control unit to satisfy the different mode of rig, and then can consult the corresponding setting of rig control system among the prior art to other parts of control system, and this is unnecessary to describe.
The power head control unit comprises a power head control oil circuit for controlling the power head to rotate, the power head control oil circuit comprises branches respectively corresponding to the water hammer and the coring device, and a power head reversing device used for switching different branches is arranged in connection with the branches. The main structure of the control oil circuit of the specific power head can refer to the arrangement of the oil circuit of the power head of the drilling machine in the prior art, and the control oil circuit of the specific power head is mainly divided into branches with different rotating speeds and torques, wherein the branch with low speed and large torque corresponds to a water hammer mode, and the branch with high speed and small torque corresponds to a coring mode. The reversing device of the power head is arranged to realize the reversing between the low-speed high-torque branch and the high-speed low-torque branch, so that the power head is switched between a water hammer mode and a coring mode.
The water supply control unit comprises a water path for supplying water for a water hammer and coring, a hydraulic water pump 9 is arranged in the water path, two groups of speed and pressure regulating loops for regulating oil supply are connected with the hydraulic water pump 9, and a water supply reversing device for switching different speed and pressure regulating loops is connected with the speed and pressure regulating loops. Because the water hammer requires high water pressure, the conventional water pump is difficult to meet the requirements, and thus the hydraulic water pump 9 is employed. The oil supply amount of the hydraulic water pump 9 is controlled, so that the water supply flow and pressure are controlled. Because the water hammer needs high water supply pressure and high flow, and the coring needs low water supply pressure and low flow, two groups of speed and pressure regulating circuits are respectively arranged and are respectively connected with the hydraulic water pump 9, and one group of speed and pressure regulating circuits controls the hydraulic water pump 9 to output low pressure and low flow so as to correspond to the coring mode; the other group of speed and pressure regulating loops control the hydraulic water pump 9 to output high pressure and high flow so as to correspond to the water hammer mode. The switching of the two groups of speed and pressure regulating loops is realized by arranging the water supply reversing device, so that the switching of the water supply mode between the water hammer and the coring is realized.
The control system of the water hammer and core drilling dual-purpose drilling machine provided by the invention is characterized in that the power head control unit and the water supply control unit respectively adopt different branches and speed and pressure regulating circuits, so that when the water hammer and core drilling working modes of the dual-purpose drilling machine are switched, the power head reversing device is directly switched to the corresponding branch so as to meet the corresponding rotating speed and torque requirements of the water hammer or the core drilling power head, and the water supply reversing device is switched to the corresponding speed and pressure regulating circuit so as to meet the corresponding water supply pressure and flow under the water hammer or the core drilling. In conclusion, through the structure, the dual-purpose drilling machine can be rapidly switched between the water hammer mode and the coring mode, and the operation is simple and convenient. Meanwhile, the control system can adopt full hydraulic control, is low in cost, simple and reliable, and is convenient for field installation and maintenance.
Specifically, the speed and pressure regulating loop comprises a water supply pressure reducing valve 7 and a water supply speed regulating valve 6 which are connected between a hydraulic water pump 9 and an oil inlet, the water supply reversing device comprises an on-off valve 8 which is connected in the speed and pressure regulating loop, and the reversing of the two-way speed and pressure regulating loop is realized through the action of the on-off valve 8. Specifically, as shown in fig. 1, an on-off valve 8, a water supply pressure reducing valve 7 and a water supply speed regulating valve 6 are sequentially connected between the hydraulic water pump 9 and the oil inlet. The oil supply amount of the hydraulic water pump 9 is controlled by the water supply speed regulating valve 6 and the water supply pressure reducing valve 7. Through the switching-over of the on-off valve 8, the speed and pressure regulating loop corresponding to the water hammer mode or the speed and pressure regulating loop corresponding to the coring mode is selected to be connected into the hydraulic water pump 9 so as to control the water supply flow and the pressure of the hydraulic water pump 9. According to the requirement, the water supply reversing device can also adopt reversing valves and the like to realize the switching between the two speed and pressure regulating loops.
In order to facilitate control, the embodiment further comprises a propeller control unit, wherein the propeller control unit comprises a propulsion control oil way for controlling the propeller, a switch multi-way valve is arranged in the propulsion control oil way, the switch multi-way valve comprises a propulsion unit, and a propulsion pressure regulating valve 3 is arranged between the propulsion unit and the propeller. The main structure of the specific propulsion control oil way can refer to the arrangement of the oil way of the drilling machine propeller in the prior art, and the improvement of the application mainly comprises the step of arranging a switch multi-way valve in the control oil way, wherein the switch multi-way valve specifically comprises a propulsion unit, and can also comprise a water supply unit and other auxiliary units according to the requirement. A propulsion pressure regulating valve 3, such as a propulsion pressure reducing valve, is arranged between the propulsion train and the propeller to regulate the propulsion speed after the propulsion train is opened.
Further, the switch multi-way valve comprises a water supply link, and the on-off valves 8 of the two paths of speed and pressure regulating loops are respectively connected with the water supply link so as to change direction under the control of the switch multi-way valve. The on-off valve 8 is controlled to change direction by switching the multi-way valve, so that a water hammer or a coring water supply mode is selected. Through the setting of switch multiway valve, with each switching setting integration, overall structure is compact, and the user operation of being convenient for.
Specifically, the switch multi-way valve is a manual valve, and handles of the water supply unit and the propulsion unit are positioning handles. The switch multi-way valve adopts a manual valve, which is convenient for manual control, namely, the water hammer or the coring mode is manually switched according to the requirement. The propulsion unit for controlling the propulsion oil cylinder and the water supply unit for controlling the water supply adopt positioning handles, namely the handles can be positioned automatically after being pushed, so that the switching state can be maintained, and manual intervention is needed when the switching state is needed. The rest auxiliary valve link handles can be automatically reset by adopting springs, and when the valve link is released by hands, the valve link is automatically reset, and the actions are stopped, so that the safety is ensured.
Further, a check valve for returning oil is provided in parallel with the propulsion pressure regulating valve 3. The direction of the check valve is from the propeller to the switch multi-way valve, when reversing, the propulsion cylinder retracts, and the return oil directly passes through the check valve connected with the propulsion pressure regulating valve 3 in parallel so as to improve the retraction speed.
In the above embodiments, the hydraulic control device further comprises an anti-seize drill rod control unit, wherein the anti-seize drill rod control unit comprises an anti-seize drill rod valve 4 and a hydraulic control reversing valve 5 which are connected in the propulsion control oil path, the anti-seize drill rod valve 4 reverses when the rotation pressure of the power head is greater than the set pressure of the anti-seize drill rod valve 4, and the hydraulic control reversing valve 5 reverses. Through detecting the rotation pressure of the power head, when the rotation pressure rises and is greater than the set pressure of the anti-jamming valve 4 (indicating that the jamming risk exists at the moment), the anti-jamming valve 4 commutates, and control oil reaches the left position of the hydraulic control reversing valve 5 through the anti-jamming valve 4 to commutate the valve, so that the hydraulic control reversing valve is pushed in and pulled out, the rotation pressure is reduced, after the rotation pressure is reduced, the hydraulic control reversing valve 5 is reset to work at the right position, and the pushing oil cylinder continues to push in.
On the basis of the above embodiments, the proportional multi-way valve 1 for controlling the forward and reverse rotation and the rotation speed of the power head is arranged in the control oil path. Namely, through setting up of proportion multiplex valve 1, different valve allies oneself with different rotational speeds and moment of torsion of corresponding control unit head, then through the switching among the different valve allies oneself with of multiplex valve, can realize the switching between the branch road that corresponds to water hammer and coring of unit head control oil circuit. Specifically, during the drilling process, the proportional multi-way valve 1 can control the forward and reverse rotation, the rotating speed and the torque of the power head.
Further, the proportional multi-way valve 1 is a manual valve, and a handle of the manual valve is a positioning handle. By adopting the manual valve, the rotation direction and the rotation speed of the power head can be manually controlled. And the handle adopts a positioning handle, namely when the handle is pulled to a certain angle, the handle is automatically positioned, namely the off-hand positioning is realized, so that the speed is maintained, and the manual work load is reduced.
In summary, the control system of the water hammer and core drilling dual-purpose drilling machine provided by the application can adopt full hydraulic manual control of the rotation, auxiliary action and water supply of the drilling machine; the rotation direction and the rotation speed of the power head are adjustable, and the power head can be positioned away from the hand; the propelling pressure is adjustable; the pressure and flow of water hammer and coring water supply are adjustable and can be switched rapidly.
Based on the control system provided in the above embodiment, the present invention also provides a multifunctional drilling machine, which includes any one of the control systems in the above embodiments. Since the multifunctional drilling machine adopts the control system in the above embodiment, the multifunctional drilling machine has the beneficial effects described in the above embodiment.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A control system for a dual-purpose water hammer and core drill, comprising:
the power head control unit comprises a power head control oil circuit for controlling the power head to rotate, wherein the power head control oil circuit comprises branches corresponding to a water hammer and coring respectively, and a power head reversing device used for switching different branches is arranged in connection with the branches;
the water supply control unit comprises a water path for supplying water for a water hammer and coring, a hydraulic water pump is arranged in the water path, two groups of speed and pressure regulating circuits for regulating oil supply are connected with the hydraulic water pump, and a water supply reversing device for switching different speed and pressure regulating circuits is arranged and connected with the speed and pressure regulating circuits;
the speed and pressure regulating loop comprises a water supply pressure reducing valve and a water supply speed regulating valve which are connected between the hydraulic water pump and the oil inlet, the water supply reversing device comprises an on-off valve which is connected in the speed and pressure regulating loop, and the reversing of the two speed and pressure regulating loops is realized through the action of the on-off valve;
the automatic control device for the propulsion of the automobile further comprises a propulsion control unit, wherein the propulsion control unit comprises a propulsion control oil way for controlling the propulsion, a switch multi-way valve is arranged in the propulsion control oil way, the switch multi-way valve comprises a propulsion unit, and a propulsion pressure regulating valve is arranged between the propulsion unit and the propulsion unit.
2. The control system of a dual-purpose water hammer and core drill according to claim 1, wherein the switch multi-way valve comprises a water supply link, and the on-off valves of the two speed and pressure regulating loops are respectively connected with the water supply link so as to be reversed under the control of the switch multi-way valve.
3. The control system of a dual-purpose water hammer and core drill rig according to claim 2, wherein the on-off multi-way valve is a manual valve, and the handles of the water supply unit and the propulsion unit are positioning handles.
4. A control system for a dual purpose water hammer and core drill according to claim 1, wherein a one-way valve for returning oil is provided in parallel with the propulsion pressure regulating valve.
5. The control system of a dual-purpose water hammer and core drill rig according to claim 1, further comprising an anti-seize control unit comprising an anti-seize valve and a hydraulically controlled reversing valve connected in the propulsion control oil circuit, the anti-seize valve reversing when the rotational pressure of the power head is greater than the set pressure of the anti-seize valve and reversing the hydraulically controlled reversing valve.
6. The control system of the dual-purpose drilling machine for the water hammer and the core drill according to any one of claims 1 to 5, wherein a proportional multi-way valve for controlling the forward and reverse rotation and the rotating speed of the power head is arranged in the control oil way.
7. The control system of a dual-purpose water hammer and core drill according to claim 6, wherein the proportional multi-way valve is a manual valve and the handle of the manual valve is a positioning handle.
8. A multifunctional drilling machine, characterized by comprising a control system of the dual-purpose drilling machine for water hammer and core drill according to any one of claims 1-7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010567694.2A CN111677490B (en) | 2020-06-19 | 2020-06-19 | Control system of dual-purpose drilling machine for water hammer and core drill and multifunctional drilling machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010567694.2A CN111677490B (en) | 2020-06-19 | 2020-06-19 | Control system of dual-purpose drilling machine for water hammer and core drill and multifunctional drilling machine |
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| CN111677490A CN111677490A (en) | 2020-09-18 |
| CN111677490B true CN111677490B (en) | 2023-07-14 |
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| EP0203282A1 (en) * | 1985-05-25 | 1986-12-03 | Ing. G. Klemm Bohrtechnik GmbH | Control of a hydraulic percussive drilling device |
| DE4329327A1 (en) * | 1993-08-31 | 1995-03-02 | Frutigen Hydrotechnik Ag | Control unit for a hydraulic operating system, in particular a double driving brake valve |
| DE9320900U1 (en) * | 1993-08-31 | 1995-06-29 | Frutigen Hydrotechnik Ag | Control unit for a hydraulic drive system, in particular a double travel brake valve |
| KR20050031629A (en) * | 2003-09-30 | 2005-04-06 | 광진중공업 주식회사 | Hammer and auger driver combine usable system |
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| FR2807118B1 (en) * | 2000-03-28 | 2002-07-05 | Mannesmann Rexroth Sa | HYDRAULIC CIRCUIT FOR OPERATING MULTIPLE HYDRAULIC RECEIVERS |
| US7096979B2 (en) * | 2003-05-10 | 2006-08-29 | Noble Drilling Services Inc. | Continuous on-bottom directional drilling method and system |
| CN101392629B (en) * | 2008-09-18 | 2010-08-11 | 山东正元地质资源勘查有限责任公司烟台分公司 | Portable all-hydraulic core drilling rig |
| CN102094608B (en) * | 2009-12-14 | 2014-03-05 | 安东石油技术（集团）有限公司 | Automatic water power pressure adjustment system |
| CN202325234U (en) * | 2011-11-22 | 2012-07-11 | 阜新工大力为科技有限公司 | Multifunctional all-hydraulic driver drill |
| CN110296111B (en) * | 2019-06-28 | 2021-05-25 | 北京三一智造科技有限公司 | Hydraulic motor system, rotary drilling rig and using method |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0203282A1 (en) * | 1985-05-25 | 1986-12-03 | Ing. G. Klemm Bohrtechnik GmbH | Control of a hydraulic percussive drilling device |
| DE4329327A1 (en) * | 1993-08-31 | 1995-03-02 | Frutigen Hydrotechnik Ag | Control unit for a hydraulic operating system, in particular a double driving brake valve |
| DE9320900U1 (en) * | 1993-08-31 | 1995-06-29 | Frutigen Hydrotechnik Ag | Control unit for a hydraulic drive system, in particular a double travel brake valve |
| KR20050031629A (en) * | 2003-09-30 | 2005-04-06 | 광진중공업 주식회사 | Hammer and auger driver combine usable system |
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| CN111677490A (en) | 2020-09-18 |
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