CN202788607U - Rock drilling key action double-pump hydraulic control loop for cutting drill - Google Patents

Rock drilling key action double-pump hydraulic control loop for cutting drill Download PDF

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Publication number
CN202788607U
CN202788607U CN 201220351910 CN201220351910U CN202788607U CN 202788607 U CN202788607 U CN 202788607U CN 201220351910 CN201220351910 CN 201220351910 CN 201220351910 U CN201220351910 U CN 201220351910U CN 202788607 U CN202788607 U CN 202788607U
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China
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oil
valve
load
control
sensitive
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Withdrawn - After Issue
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CN 201220351910
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Chinese (zh)
Inventor
王东升
马海淮
赵宏强
林宏武
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Sunward Intelligent Equipment Co Ltd
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Sunward Intelligent Equipment Co Ltd
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Priority to CN 201220351910 priority Critical patent/CN202788607U/en
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Abstract

A rock drilling key action double-pump hydraulic control loop for a cutting drill comprises a duplex load-sensing variable pump unit, a duplex oil-inlet load-sensing multi-way valve, a rotary motor, a propulsion motor, a rock drilling logic control block, a rotary pilot handle, a propulsion pilot handle and a hydraulic oil tank. An oil inlet port of the duplex oil-inlet load-sensing variable pump unit is connected with the hydraulic oil tank, an oil outlet and a load sensing port of the duplex load-sensing variable pump unit are respectively connected with an oil inlet and a load sensing port of the duplex oil-inlet load-sensing multi-way valve, each valve-pressure compensator of the load-sensing multi-way valve is provided with an outer control port which is connected with the rock drilling logic control block, and the rotary pilot handle and the propulsion pilot handle are connected with the rock drilling logic control block or a pilot control port of the load-sensing multi-way valve. By the rock drilling key action double-pump hydraulic control loop, control and propulsion of rotation proportion of a power head, rotation and propulsion separated load sensing control, increase of propulsion speed and the like are realized.

Description

The crucial rock drilling action of a kind of cutting drill double pump hydraulic control circuit
Affiliated technical field
The utility model relates to the crucial rock drilling action of a kind of cutting drill double pump hydraulic control circuit.
Background technology
Cutting drill is a kind of novel rock drilling machine, its operation mechanism is that the High Rotation Speed fragmentation is crept into, bore operation for rock stratum such as shale, sandstone has high-speed and high-efficiency, simple and easy easily outstanding advantages, the present various brands cutting drill of analysis-by-synthesis hydraulic system is the simple modifications exploitation based on small-sized or medium-sized excavator hydraulic system.Cutting drill is compared excavator and is deducted three actions such as swing arm beat, quartering hammer and scraper bowl, three actions such as the propelling of increase unit head, unit head revolution, air compressor machine utilize main-control valve of excavating machine beat connection, quartering hammer connection and the realization of scraper bowl connection to the control of three actions such as the propelling of cutting drill unit head, unit head revolution and air compressor machine.Rock drilling advances control generally to adopt adjustable decompression type constant voltage to advance, advance the working connection banked direction control valves and advance the reducing valve of connecting between the executing agency, and behind banked direction control valves, before the reducing valve by the one way valve interflow to turning round working connection, both advanced by the decompression type constant voltage and guaranteed that drill bit fully contacted the rock stratum, preventing again that propulsive force is excessive causes that steering resistance is excessive and causes bit freezing that the flow of according to rate of penetration the demand for control of flow being controlled unnecessary propelling connection again collaborates to unit head revolution working connection.
But improve the cutting drill hydraulic system of exploitation based on excavator hydraulic system, has advantage simple, that easily go, shortened the cycle of cutting drill hydraulic system exploitation, but this system has congenital limitation, lack deep test and theory analysis that rock drilling mechanism is crept in to rotary cutting fragmentation.When rock stratum geology and hardness changed in drilling process especially, it was relatively poor to creep into compliance.The decompression type constant voltage advances control, and behind the reducing valve pressure setting, propulsive force is definite value in the boring procedure, and during soft rock geology, under the identical unit head revolution rotating speed, though the hardness partially soft amount of feeding because of the drill bit individual pen in rock stratum is larger, steering resistance is set up higher; During hard rock geology, under the identical unit head revolution rotating speed, though rock stratum hardness is partially hard because the amount of feeding of drill bit individual pen is less, steering resistance is set up lower; When rock stratum geology became hard rock by soft rock in the drilling process, the amount of feeding of drill bit individual pen diminished, and advanced required flow to reduce, and unnecessary propelling connection institute flow control amount interflow is to the revolution connection, turned round then that rotating speed accelerates but rate of penetration reduces on the contrary; When rock stratum geology became soft rock by hard rock in the drilling process, drill bit individual pen feeding quantitative change was large, advanced required flow to increase, and it is slack-off then to turn round rotating speed, and steering resistance is set up and uprised, and then rate of penetration accelerates but steering resistance rises to certain value will cause bit freezing.Main control valve is to existing limitation on unit head revolution and the assignment of traffic that advances and the load matched, because advancing working connection to collaborate to turning round working connection through one way valve, advance the selection of executing agency must guarantee to advance preferential revolution, the design of propelling executing agency must be satisfied the lower propulsive force that produces of the revolution load pressure (it is low to compare soft rock) of setting up in the hard rock operation and satisfy hard rock operation propulsive force demand.Pore-forming shadoof, extension bar sky are carried and are unloaded and advance responsiveness slower under the operating modes such as the bar sky pushes away, perhaps stopping the unit head revolution collaborates main control valve revolution connection flow to advancing working connection to improve shadoof speed, but stop revolution, can cause unexpected bit freezing if larger crushed stone slips into pore-forming.During the soft rock operation, drill bit is more easily eaten into the rock stratum, and less propulsive force can improve drilling efficiency and prevent bit freezing; During the hard rock operation, drill bit tastes bad into the rock stratum, and larger propulsive force can improve drilling efficiency and prevent drill slipping.When the extension bar sky is carried, unloaded the bar sky and pushes away with the pore-forming shadoof, advance faster upward strain speed to shorten cycle time for working, unit head revolution action can be slack-off but can not be stopped, and prevents from causing unexpected bit freezing because larger crushed stone slips into pore-forming.The crucial rock drilling action of cutting drill needs more to be fit to the dedicated hydraulic control loop of its working condition.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art and provides a kind of cutting drill that improves to the compliance of formation variations, it is enough to propose flow-control in the assurance, improve pore-forming shadoof speed, reduce the crucial rock drilling action of a kind of cutting drill double pump hydraulic control circuit of cycle time for working.
The crucial rock drilling action of a kind of cutting drill double pump hydraulic control circuit, comprise duplex load-reacting pump group, two oil-feed connection load-sensitive proportional multi-way valves, rotary motor, propulsion motor, the rock drilling logic control block, the revolution pilot handle, advance pilot handle and hydraulic oil container, the oil-in of described duplex load-reacting pump group is connected with described hydraulic oil container, the pressure oil P1 end of described duplex load-reacting pump group is connected with two oil-feed connection load-sensitive proportional multi-way valve left side oil-feed connection oil inlet P 1, the pressure oil P2 end of described duplex load-reacting pump group is connected with two oil-feed connection load-sensitive proportional multi-way valve right side oil-feed connection oil inlet P 2, described duplex load-reacting pump group load-sensitive mouth Ls1 is connected with described couple of oil-feed connection load-sensitive proportional multi-way valve load-sensitive mouth Ls1, described duplex load-reacting pump group load-sensitive mouth Ls2 is connected with described couple of oil-feed connection load-sensitive proportional multi-way valve load-sensitive mouth Ls2, described pair of oil-feed connection load-sensitive proportional multi-way valve comprises left side oil-feed connection, revolution connection banked direction control valves, right side oil-feed connection, advance connection the first valve, second valve, the differential pressure compensator of every plate valve and load-sensitive outside control mouth thereof, described rock drilling logic control block comprises the hydraulic control proportional servo valve, high-pressure overflow valve, low pressure relief valve, the first solenoid operated directional valve and the second solenoid operated directional valve, the forward master control hydraulic fluid port A of described rotary motor is connected with oil-in B1 with the oil-in A1 of described revolution connection banked direction control valves respectively with the master control hydraulic fluid port B that is connected, the guide oil control mouthful a1 of described revolution connection banked direction control valves is connected mouthful b1 and is connected with the guide's hydraulic fluid port that is connected with forward guide's hydraulic fluid port of revolution pilot handle respectively with guide oil, described propelling connection banked direction control valves comprises second valve and first valve of interflow work, described second valve Median Function is the O type, the oil-in A2 that described propulsion motor lower pushes away direction master control hydraulic fluid port A and described the first valve be connected the oil-in A3 of second valve and be connected, the oil-in B2 that carries direction master control hydraulic fluid port B and described the first valve on the described propulsion motor be connected the oil-in B3 of second valve and be connected, the guide oil of described the first a valve control mouthful a2 is connected a guide oil control mouthful a3 and is connected with two oil-ins of described the first solenoid operated directional valve respectively with second valve, after controlling mouthful a2 and the oil-in of described the first solenoid operated directional valve is connected, the guide oil of described the first valve is connected with the lower guide's of the pushing away hydraulic fluid port that advances pilot handle again, the guide oil of a described valve control mouthful b2 is connected a guide oil control mouthful b3 and is connected with two oil-ins of described the second solenoid operated directional valve respectively with second valve, the guide oil of described the first valve control mouthful b2 with carry guide's hydraulic fluid port and be connected again with on the propelling pilot handle after the oil-in of described the second solenoid operated directional valve is connected, the load-sensitive mouth Ls of described revolution connection banked direction control valves is connected with the control end of described hydraulic control proportional servo valve, the load-sensitive mouth LsA of described propelling connection banked direction control valves be connected with described high-pressure overflow valve again after described hydraulic control proportional servo valve is connected, the oil-out of described hydraulic control proportional servo valve is connected with described low pressure relief valve, described hydraulic control proportional servo valve, high-pressure overflow valve, low pressure relief valve, the first solenoid operated directional valve be connected the oil-out of solenoid operated directional valve and be connected with oil return opening.
In the utility model, described the first solenoid operated directional valve and the second solenoid operated directional valve are the two-bit triplet solenoid operated directional valve.
Owing to adopt such scheme, the utlity model has following advantage:
When 1, the utility model was by the soft rock operation, drill bit was more easily eaten into the rock stratum, and less propulsive force can improve drilling efficiency and prevent bit freezing; During the hard rock operation, drill bit tastes bad into the rock stratum, larger propulsive force can improve drilling efficiency and prevent the principle of drill slipping, realized unit head rotation pressure proportional control propelling pressure, improve cutting drill to the automatic compliance of formation variations, improve operating efficiency, and prevent the bit freezing that rises and cause because of steering resistance.
2, the utility model is realized the unit head revolution and is advanced relatively independent load-sensitive proportional control, the impact of load pressure is not turned round in the foundation of propelling pressure, sets up the low propelling pressure that causes because of steering resistance when overcoming the hard rock operation and sets up the lower drill slipping that occurs.
3, the utility model the extension bar sky carry, unload the bar sky push away with pore-forming shadoof operating mode under, advance two banked direction control valves interflow work of connection, improve unit head and advance responsiveness, shorten cycle time for working.
Description of drawings
Fig. 1 is schematic diagram of the present utility model.
Fig. 2 is rock drilling logic control block schematic diagram of the present utility model.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
The crucial rock drilling action of a kind of cutting drill double pump hydraulic control circuit, by duplex load-reacting pump group 1, two oil-feed connection load-sensitive proportional multi-way valves 2, unit head rotary motor 3, unit head propulsion motor 4, hydraulic oil container 8 grades form the crucial rock drilling action of cutting drill hydraulic control working connection, form load-sensitive proportional control to the unit head rotary motor by revolution connection banked direction control valves 21 in pump P1 in the duplex load-reacting pump group 1 and the two oil-feeds connection proportional multi-way valves, form load-sensitive proportional control to the unit head propulsion motor by another pump P2 in the duplex load-reacting pump group 1 and the first valve 23 and second valve 22.Form the crucial rock drilling action logic control of cutting drill and pilot control oil circuit by rock drilling logic control block 5, revolution pilot handle 6, propelling pilot handle 7 etc.
Function and the configuration feature of two oil-feed connection load-sensitive proportional multi-way valves 2 are: the bilateral oil-feed, close the center, and both sides oil circuit and control relation are separate; Every plate valve advances connection the first valve 23 and second valve 22 to have especially A, B hydraulic fluid port independence load-sensitive outside control mouth with differential pressure compensator and load-sensitive outside control mouth thereof; Two plate valves advance the control connection as unit head, and wherein 22 Median Functions of second valve are the O type, and A, B hydraulic fluid port have protecting against shock and cavitation-preventive valve.It is criterion that revolution connection banked direction control valves 21 positive veer cutting rotary veer main control hydraulic fluid port A1 flows are configured to satisfy the cutting rotary rotary speed, advance connection the first valve 23 direction of propulsion cutting drilling direction main control hydraulic fluid port A2 flow to creep into fltting speed as criterion to satisfy maximum, advance connection push away second valve 22 advance direction cutting drilling direction main control hydraulic fluid port A3 flow take A2, A3 mouth flow sum satisfy the extension bar control carry, unload the bar sky push away with pore-forming shadoof operating mode under advance action speed to push away as criterion.
Rock drilling logic control block 5 is comprised of hydraulic control proportional servo valve 51, high-pressure overflow valve 52, low pressure relief valve 53, two-bit triplet solenoid operated directional valve 54 and two-bit triplet solenoid operated directional valve 55.Hydraulic control proportional servo valve 51 also can be the special equilibrium valve, key is to realize pressure dynamic equilibrium control, namely advances connection 23 differential pressure compensator load-sensitive outside control mouth LsA pressure dynamic equilibrium between high-pressure overflow valve 52 and low pressure relief valve 53 setting values according to revolution connection second valve 22 or the first valve 21 load pressure Ls control.Two oil-feed connection load-sensitive proportional multi-way valve 2 revolution connection load-sensitive mouth Ls link to each other revolution load pressure control hydraulic control proportional servo valve 51 spool apertures with hydraulic control proportional servo valve 51 hydraulic control mouths; Advance connection direction of propulsion cutting drilling direction load-sensitive outside control mouth LsA to link to each other with hydraulic control proportional servo valve 51 oil-ins with high-pressure overflow valve 52 simultaneously, hydraulic control proportional servo valve 51 oil-outs link to each other with low pressure relief valve 53; Hydraulic control proportional servo valve 51 advances connection direction of propulsion cutting drilling direction load-sensitive outside control mouth LsA pressure smooth change in high-pressure overflow valve 52 and low pressure relief valve 53 setting pressure scopes according to the control of revolution load pressure, high-pressure overflow valve 52 pressure settings are take the required maximum propelling pressure of hard rock as criterion, low pressure relief valve 53 pressure settings are take the required minimum propelling pressure of soft rock as criterion, and hydraulic control proportional servo valve 51 pressure setting scopes are between hard rock revolution load pressure and soft rock revolution bit freezing critical pressure.Under advancing 7 times pushing guide oils of pilot handle and advance the connection banked direction control valves, 54 controls of two-bit triplet pilot operated directional control valve push away being connected of direction cutting drilling direction master control hydraulic fluid port A2, A3 guide's hydraulic fluid port a2, a3, when being in normal position, be communicated with a2, simultaneously the a3 off-load, when electric, be communicated with simultaneously with a2, a3; 55 controls of two-bit triplet pilot operated directional control valve are carried being connected of direction master control hydraulic fluid port B2, B3 guide's hydraulic fluid port b2, b3 on advancing and carrying a guide oil on the pilot handle 7 and advance the connection banked direction control valves, when being in normal position, be communicated with b2, simultaneously the b3 off-load, when electric, be communicated with simultaneously with b2, b3.
The concrete flow process of this device hydraulic pressure is as follows:
1. rock drilling operation control
Under the rock drilling working condition, revolution pilot handle 6 is in positive transposition, and the two oil-feed connection of control load-sensitive proportional multi-way valve 2 one sides are turned round connection 21 positive veer cutting rotary veer working hole A1 pressure oil output, realize the load-sensitive proportional control of unit head revolution action; Advance handle 7 to be in lower pushing, two-bit triplet solenoid operated directional valve 54 dead electricity are in normal position, push away direction cutting drilling direction working hole A2 pressure oil output under the two oil-feed connection of control load-sensitive proportional multi-way valve 2 opposite sides advance, realize that unit head advances the load-sensitive proportional control of action; Hydraulic control proportional servo valve 51 advances connection direction of propulsion cutting drilling direction load-sensitive outside control mouth LsA pressure smooth change in high-pressure overflow valve 52 and low pressure relief valve 53 setting pressure scopes according to revolution load pressure control load sensing multi-way valve 2, advancing connection the first valve 23 differential pressure compensators to change control with outside control mouth LsA advances connection to advance hydraulic fluid port A3 output pressure smooth change in high-pressure overflow valve 52 and low pressure relief valve 53 setting pressure scopes, realize unit head revolution load pressure proportional control propelling pressure, improve in the cutting drill drilling process the automatic compliance to formation variations.
The extension bar sky carry, pore-forming shadoof and unload the bar sky and advance fast control
The extension bar sky carry or pore-forming shadoof operating mode under, two-bit triplet solenoid operated directional valve 55 gets electric, advance pilot handle 7 to be in and carry the position, guide oil is communicated with simultaneously through rock drilling logic control block 5 carries connection guide hydraulic fluid port b2, b3 in two propellings, two sheets advance connection the first valve 23, second valve 22 interflow work, realize proposing on the unit head the quick control of action; Unloading the bar sky pushes away under the operating mode, two-bit triplet solenoid operated directional valve 54 gets electric, advance pilot handle 7 to be in lower pushing, guide oil is communicated with simultaneously through rock drilling logic control block 5 carries connection guide hydraulic fluid port a2, a3 in two propellings, two advance connection the first valve 23, second valve 22 interflow work, realize proposing on the unit head the quick control of action; Advance simultaneously connection banked direction control valves master hydraulic fluid port A3, B3 to have protecting against shock and cavitation-preventive control, avoid the impact and the cavitation erosion that advance unexpected start-stop to cause because of fast.

Claims (2)

1. the crucial rock drilling action of cutting drill double pump hydraulic control circuit, comprise duplex load-reacting pump group (1), two oil-feed connection load-sensitive proportional multi-way valves (2), rotary motor (3), propulsion motor (4), rock drilling logic control block (5), revolution pilot handle (6), advance pilot handle (7) and hydraulic oil container (8), it is characterized in that: the oil-in of described duplex load-reacting pump group (1) is connected with described hydraulic oil container (8), pressure oil (P1) end of described duplex load-reacting pump group (1) is connected with two oil-feed connection load-sensitive proportional multi-way valves (2) left side oil-feed connection oil-ins (P1), pressure oil (P2) end of described duplex load-reacting pump group (1) is connected with two oil-feed connection load-sensitive proportional multi-way valve (2) right side oil-feed connection oil-ins (P2), described duplex load-reacting pump group (1) load-sensitive mouth (Ls1) is connected with described pair of oil-feed connection load-sensitive proportional multi-way valve (2) load-sensitive mouth (Ls1), described duplex load-reacting pump group (1) load-sensitive mouth (Ls2) is connected with described pair of oil-feed connection load-sensitive proportional multi-way valve (2) load-sensitive mouth (Ls2), described pair of oil-feed connection load-sensitive proportional multi-way valve comprises left side oil-feed connection, revolution connection banked direction control valves (21), right side oil-feed connection, advance connection the first valve (23), second valve (22), the differential pressure compensator of every plate valve and load-sensitive outside control mouth thereof, described rock drilling logic control block (5) comprises hydraulic control proportional servo valve (51), high-pressure overflow valve (52), low pressure relief valve (53), the first solenoid operated directional valve (54) and the second solenoid operated directional valve (55), the forward master control hydraulic fluid port (A) of described rotary motor is connected B1 with the oil-in (A1) of described revolution connection banked direction control valves (21) respectively with the master control hydraulic fluid port (B) that is connected with oil-in) be connected, the guide oil control mouthful (a1) of described revolution connection banked direction control valves (21) is connected mouthful (b1) and is connected with the guide's hydraulic fluid port that is connected with forward guide's hydraulic fluid port of revolution pilot handle (6) respectively with guide oil, described propelling connection banked direction control valves comprises second valve (22) and first valve (23) of interflow work, described second valve (22) Median Function is the O type, the oil-in (A2) that described propulsion motor lower pushes away direction master control hydraulic fluid port (A) and described the first valve (23) be connected the oil-in (A3) of second valve (22) and be connected, the oil-in (B2) of carrying direction master control hydraulic fluid port (B) and described the first valve (23) on the described propulsion motor be connected the oil-in (B3) of second valve (22) and be connected, the guide oil of described the first valve (23) control mouthful (a2) is connected 22 with second valve) guide oil control mouth (a3) be connected with two oil-ins of described the first solenoid operated directional valve (54) respectively, after controlling mouthful (a2) and the oil-in of described the first solenoid operated directional valve (54) is connected, the guide oil of described the first valve (23) is connected with the lower guide's of the pushing away hydraulic fluid port that advances pilot handle (7) again, the guide oil of described valve (23) control mouthful (b2) is connected 22 with second valve) guide oil control mouth (b3) be connected with two oil-ins of described the second solenoid operated directional valve (55) respectively, the guide oil of described the first valve (23) control mouthful (b2) with carry guide's hydraulic fluid port and be connected again with on the propelling pilot handle (7) after the oil-in of described the second solenoid operated directional valve (55) is connected, the load-sensitive mouth (Ls) of described revolution connection banked direction control valves is connected with the control end of described hydraulic control proportional servo valve (51), the load-sensitive mouth (LsA) of described propelling connection banked direction control valves be connected with described high-pressure overflow valve (52) again after described hydraulic control proportional servo valve (51) is connected, the oil-out of described hydraulic control proportional servo valve (51) is connected with described low pressure relief valve (53), described hydraulic control proportional servo valve (51), high-pressure overflow valve (52), low pressure relief valve (53), the first solenoid operated directional valve (54) be connected the oil-out of solenoid operated directional valve (55) and be connected with oil return opening.
2. the crucial rock drilling action of cutting drill according to claim 1 double pump hydraulic control circuit, it is characterized in that: described the first solenoid operated directional valve (54) and the second solenoid operated directional valve (55) are the two-bit triplet solenoid operated directional valve.
CN 201220351910 2012-07-19 2012-07-19 Rock drilling key action double-pump hydraulic control loop for cutting drill Withdrawn - After Issue CN202788607U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220351910 CN202788607U (en) 2012-07-19 2012-07-19 Rock drilling key action double-pump hydraulic control loop for cutting drill

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Application Number Priority Date Filing Date Title
CN 201220351910 CN202788607U (en) 2012-07-19 2012-07-19 Rock drilling key action double-pump hydraulic control loop for cutting drill

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102747948A (en) * 2012-07-19 2012-10-24 山河智能装备股份有限公司 Double-pump hydraulic control loop of key drilling action of cutting drill rig
CN110182610A (en) * 2019-04-29 2019-08-30 宝钢湛江钢铁有限公司 A kind of intelligence stacker-reclaimer intelligence pitching Hydraulic system and control method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102747948A (en) * 2012-07-19 2012-10-24 山河智能装备股份有限公司 Double-pump hydraulic control loop of key drilling action of cutting drill rig
CN102747948B (en) * 2012-07-19 2014-05-21 山河智能装备股份有限公司 Double-pump hydraulic control loop of key drilling action of cutting drill rig
CN110182610A (en) * 2019-04-29 2019-08-30 宝钢湛江钢铁有限公司 A kind of intelligence stacker-reclaimer intelligence pitching Hydraulic system and control method
CN110182610B (en) * 2019-04-29 2021-07-13 宝钢湛江钢铁有限公司 Intelligent pitching hydraulic system of intelligent stacker-reclaimer and control method

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