CN103821451A - Hydraulic control system of anti-clamping drill rod of rock drilling machine - Google Patents
Hydraulic control system of anti-clamping drill rod of rock drilling machine Download PDFInfo
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- CN103821451A CN103821451A CN201410071094.1A CN201410071094A CN103821451A CN 103821451 A CN103821451 A CN 103821451A CN 201410071094 A CN201410071094 A CN 201410071094A CN 103821451 A CN103821451 A CN 103821451A
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Abstract
The invention provides a hydraulic control system of an anti-clamping drill rod of a rock drilling machine. The hydraulic control system comprises an LS (Load Sensor) control variable pump, a rock drilling impact valve block, a propelling control valve set, a propelling pressure regulating valve block, an anti-clamping drill rod valve block and a pilot handle control valve set. When a rotary pressure of the rock drilling machine is raised, the hydraulic control system has the functions that the pressure of a propelling oil cylinder of the rock drilling machine is automatically reduced, the propelling is stopped and the rock drilling machine is automatically returned to the outside, and the impact is automatically stopped when the rock drilling machine is returned; compared with the prior art, a control function is the most complete. The control system adopts an LS control function of the variable pump and has the characteristics of good automatic control performance, strong commonality of hydraulic elements, energy saving and high efficiency.
Description
Technical field
The present invention relates to a kind of hydraulic control system, the particularly hydraulic control system of hammer drill, can realize adjustable continuously between light, the heavy percussion power of hammer drill.
Background technology
Hammer drill is in the rock construction equipment of engineering machinery, there is very important effect, main rock-boring machinery, hydraulic gate is because its cutting rate is fast, power is large, efficiency is high, it is little to pollute, in occupation of the leading position of hammer drill, hydraulic gate is widely used in the even occasion such as driving, colliery and military engineering construction of city underground of the underground mining of black and nonferrous mine and tunnelling, railway and highway tunnel.
General hydraulic gate all needs to be furnished with drill steel, bore bit and coupling sleeve, utilizes bore bit fractured rock and holes, and in the time of work, the bore bit of hammer drill, except impacting rock, also needs rotation and advances, to realize high-speed drilling and reduce the wearing and tearing of bore bit.Except low power hand-held hydraulic hammer drill, hydraulic gate is because power is large, speed is fast, and the weight of itself is also large, is therefore conventionally configured in transportable vehicle (drill wagon for jack hammer) upper, to realize the rapid drilling to rock.
As everyone knows, rock is not homogeneous substance, in a boring, there will be unavoidably the phenomenon of the rock change of properties such as the crack of rock, hardness differ, interlayer.Due to above reason, can there is deflection in the direction of advance of drill bit, make drill pipe buckling.Like this because of the deflection influence of bore position construction quality, when drill pipe buckling is serious, can block, drill steel and drill bit cannot take out, and form useless hole.Therefore, general drill wagon for jack hammer has a kind of control technology of anti-sticking pricker to hammer drill, prevent the generation of above accident.
General drill wagon for jack hammer, conventional anti-sticking pricker device is in the time that the rotation torque of drilling rod exceedes a certain setting value, the propeller of hammer drill can stop advancing and returning backward, in the time that moment of torsion reduces to certain value, just automatically again advances.In the DCS-12 hydraulic control system of the Atlas Copco company that function ratio is more complete, in the time that the rotation torque of hammer drill is increased to certain value, can reduce angle of rake propelling pressure, if when rotation torque continues to be increased to higher value, then the method that adopts propeller to return to exit.Its workpiece principle is referring to Fig. 1.
The propelling pressure (pressure meter 030) of propeller propelling cylinder 020 is controlled by reducing valve 610, reducing valve 610 itself can be controlled high output pressure, by control port 300P, can also lower the output pressure of reducing valve in addition, i.e. angle of rake propelling pressure.
The rotational pressure (pressure meter 050) of hammer drill rotation motor, by controlling a hydraulic-control throttling valve 820 in anti-sticking pricker valve 800, the pressure of the control port 300P to reducing valve 610 is exerted one's influence.When rotational pressure is during higher than the setting pressure of valve 820, valve 820 is shifted, and controls the pressure of oily 300P by the leakage step-down of the throttle orifice of valve 820, the same step-down of output pressure of reducing valve 610, therefore on propeller, the propulsive force of propelling cylinder reduces, the hammer drill speed that boring advances that slowed down.
When the measure of above-mentioned anti-sticking pricker still can not be fixed a breakdown, the rotational pressure of hammer drill continues to raise, while exceeding the propeller returning pressure of being set by overflow valve 830, two five-way hydraulic operated valves 810 in anti-sticking pricker valve commutate, forward operation valve 710 is supplied with to the hydraulic oil 020A switching of propelling cylinder 020 rodless cavity, the rod chamber 020B hydraulic fluid port of supply propelling cylinder 020, realized the commutation of propelling cylinder, propeller has been become to retreat by propelling and has returned.In the time that above-mentioned rotational pressure reduces, can progressively return to original duty, realize the control requirement that automatically prevents card pricker.
DCS-12 hydraulic system, use be that LS controls the variable pump 010 of (Load Sinser control, Loadsensing control), LS control device is only used as pressure-reduction starting device.Complete when motor start-up, when hydraulic work system, electromagnetic valve 630 is switched on, and variable pump is operated under constant-pressure variable state, operated valve member (710,720) use be the banked direction control valves of open system, do not give full play to LS control superiority.
Although the anti-sticking pricker technology of DCS-12 is more advanced, use also more effective, the operation of its open type banked direction control valves, the shortcoming such as constant pressure pump step-down control is impacted and advanced, and exists energy consumption high, and anti-sticking pricker valve block structure complexity, standardization level are low.
Summary of the invention
The object of the present invention is to provide a kind of hammer drill anti-sticking pricker hydraulic control system, in the time that hammer drill rotational pressure rises, possess hammer drill propelling cylinder pressure and automatically reduce, stop, outside propelling, hammer drill auto-returned, also to possess the function that automatically stops impact when hammer drill returns.
In order to achieve the above object, the invention provides a kind of hammer drill anti-sticking pricker hydraulic control system, comprise variable pump, rock drilling dash valve piece, propulsion control valve group, propelling pressure regulating valve block, anti-sticking pricker valve piece and pilot handle control valve group that LS controls;
The oil-in of variable delivery side of pump and propulsion control valve group, reducing valve in rock drilling dash valve piece connects, the output of described reducing valve is as the pilot control oil sources of pilot handle, control guide oil the surging after direction valve control by anti-sticking pricker valve piece that hammer drill heavily impacts handle, with the two ends that are connected to the first shuttle valve of rock drilling impulsive control valve piece together with the guide oil of light impulsive control handle, the direction valve that surges of rock drilling dash valve piece has been controlled in the output of described shuttle valve, this direction valve that surges has been controlled again and has been advanced the output pressure signal of pressure regulating valve block whether to be connected with the pressure signal of propulsion control valve group.The two ends of the second shuttle valve of rock drilling dash valve piece are connecting pressure signal in propulsion control valve group and another hammer drill pressure signal of propulsion control valve group inside, the output of described the second shuttle valve is connected with the pressure hydraulic fluid port of the overflow valve of rock drilling dash valve piece, is also connecting the LS control port of variable pump simultaneously;
Action advances oil cylinder advances and returns guide oil the surging after two position four-way valve controls through anti-sticking pricker valve piece of handle, be connected to the control end of direction of propulsion valve in propulsion control valve group, the control mouth of the direction valve that surges of anti-sticking pricker valve piece in addition that advances guide oil to be connected with action advances oil cylinder in it, the break-make of heavily impacting the guide oil of handle by this direction valve control hammer drill that surges.The oil-in of direction of propulsion valve is connected with the oil-out of variable pump by after propelling pressure recuperation valve.The two ends that two oil-outs of direction of propulsion valve are received propelling cylinder after being connected with two overflow valves respectively.The pressure signal oil of direction of propulsion valve can be connected respectively two pressure-control valves and pressure signal is connected to by exterior tubing on the second shuttle valve of rock drilling dash valve piece;
In anti-sticking pricker valve piece, the pressure hydraulic fluid port that hammer drill rotation motor is rotated in the forward pressure oil and two overflow valves is connected, and the oil return opening of two overflow valves is connected with control oil return pipe after connecting respectively again a throttle orifice.Two position four-way valves that surge of anti-sticking pricker valve piece have been controlled in the junction of throttle orifice and overflow valve, the control of described two four-way hydraulic operated valves direction of propulsion valve advance and return guide oil normality or the reverse operating of handle.The junction of another throttle orifice and overflow valve with propelling pressure regulating valve block on the control port of equalizing valve be connected;
Advance in pressure regulating valve block, output pressure signal and advance pressure regulating valve block equalizing valve, advance the overflow valve of pressure regulating valve block and advance the hydraulic fluid port of the direction valve that surges of pressure regulating valve block to be connected, described in surge under direction valve normality and can also make output pressure signal be connected with the pressure hydraulic fluid port of the second overflow valve on propelling pressure regulating valve block.The control port of direction valve of surging is connected with the guide oil that the control hammer drill on rock drilling control valve piece heavily impacts handle.
Further, automatically stop the function that hammer drill impacts can simplify anti-sticking pricker propeller auto-returned time, the direction valve that surges in card pricker valve piece in the air, makes to control the guide oil that hammer drill heavily impacts handle and not controlled by it.And other are correspondingly simplified propeller and automatically reduce the methods such as pressure functional.
Further, the reducing valve in rock drilling control valve piece, can be substituted by other pilot control in hydraulic system.
Further, pilot handle, available electro-hydraulic proportional valve etc. other pilot-actuated valve substitute.
Beneficial effect of the present invention:
The invention provides a kind of novel hammer drill anti-sticking pricker control system, in the time that hammer drill rotational pressure rises, possessing hammer drill propelling cylinder pressure automatically reduces, stops outside propelling, hammer drill auto-returned, also possesses the function that automatically stops impact when hammer drill returns, with prior art comparison, control function the most complete.And this control system all adopts variable pump LS to control function, has that automatic control performance is good, the feature of Hydraulic Elements highly versatile, efficient energy-saving.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of anti-sticking pricker part in the DCS-12 hydraulic control system of Atlas Copco company;
Fig. 2 is the schematic diagram of a kind of hammer drill anti-sticking pricker control system specific embodiment of the present invention;
Wherein in Fig. 1: the variable pump that 010, LS controls, 020, the propelling cylinder of drill feed, 030 propelling pressure table, 040, hammer drill rotation motor, 050 hammer drill is rotated in the forward pressure meter, and the each hydraulic fluid port of 020A is: propelling cylinder propelling pressure oil, 020B back pressure oil, 040a hammer drill rotation motor forward pressure oil, 040b reversal pressure oil, P10, variable pump pressure oil, LS, variable pump control oil, T, main oil return, t, control oil return; 300P, reducing valve control oil, 720C, light impulsive control oil, 710, A forward operation valve propelling pressure oil, 710B, return pressure oil, S10, surge oil; 370, hydraulic control one-way valve, 380 throttle orifices, 600, reducing valve piece, 610, external control type reducing valve, 620, one way valve, 630, solenoid operated directional valve, 710, forward operation main valve, 720, hammer drill blasting operation valve, 730, choke valve, 740, choke valve, 800, anti-sticking pricker valve group, 810, two five-way hydraulic operated valves, 820, hydraulic-control throttling valve, 830 overflow valves, 840,850, throttle orifice.
In Fig. 2: 01, variable pump, 02, the propelling cylinder of drill feed, 03, propelling pressure table, 04, hammer drill rotation motor, 05, hammer drill is rotated in the forward pressure meter, P2, propelling valve oil-feed port, Pc, pilot control oil sources, LS1, propulsion control valve group pressure signal, LS2, propelling pressure regulating valve block output pressure signal, LS3, hammer drill pressure signal, 20a, propelling guide oil, guide oil is returned in 20b, propelling, C1, hammer drill heavily impact guide oil, C2, gently impact guide oil, K1, advance pressure regulation signal, 10, rock drilling dash valve piece, 11, overflow valve, 12, direction valve surges, 13 reducing valve, 14, shuttle valve, 15, shuttle valve, 20, propulsion control valve group, 21a, propelling pressure valve, 21b, return pressure valve, 22a, propelling pressure overflow valve, 21b, return Pressure relief valve, 23, direction of propulsion valve, 24, propelling pressure recuperation valve, 30, advance pressure regulating valve block, 31, direction valve surges, 32, overflow valve, 33, overflow valve, 34, equalizing valve, 40, anti-sticking pricker valve piece, 41, direction valve surges, 44, two four-way hydraulic operated valves, 42, overflow valve, 43, overflow valve, 45, throttle orifice, 46, throttle orifice, 50, pilot handle, 51a, advance handle, 51b, handle is returned in propelling, 52a, heavily impact handle, 52b, the light handle that impacts.
The specific embodiment
As shown in Figure 2, a kind of hammer drill anti-sticking pricker hydraulic control system, comprises variable pump 01, rock drilling dash valve piece 10, propulsion control valve group 20, propelling pressure regulating valve block 30, anti-sticking pricker valve piece 40 and pilot handle control valve group 50 that LS controls.
The oil-in of the outlet of variable pump 01 and propulsion control valve group 20, reducing valve 13 in rock drilling dash valve piece 10 connects, the output of described reducing valve is as the pilot control oil sources Pc of pilot handle, control guide oil the surging after direction valve 41 controls by anti-sticking pricker valve piece 40 that hammer drill heavily impacts handle, with the two ends that are connected to the shuttle valve 15 of rock drilling dash valve piece 10 together with the guide oil of light impulsive control handle, the direction valve 12 that surges of rock drilling dash valve piece 10 has been controlled in the output of described shuttle valve, this direction valve that surges has been controlled again and has been advanced the output pressure signal of pressure regulating valve block 30 whether to be connected with the pressure signal of propulsion control valve group 20.The two ends of the shuttle valve 14 of rock drilling dash valve piece 10 are connecting pressure signal in propulsion control valve group 20 and another hammer drill pressure signal of propulsion control valve group 20 inside, the output of described shuttle valve 14 is connected with the pressure hydraulic fluid port of the overflow valve 11 of rock drilling dash valve piece 10, is also connecting the LS control port of variable pump 01 simultaneously.
Action advances oil cylinder advance and the guide oil that returns to handle after two four-way hydraulic operated valves 44 of anti-sticking pricker valve piece 40 are controlled, be connected to the control end of direction of propulsion valve 23 in propulsion control valve group 20, the control mouth of the direction valve 41 that surges of anti-sticking pricker valve piece 40 in addition that advances guide oil to be connected with action advances oil cylinder in it, the break-make of heavily impacting the guide oil of handle by this direction valve control hammer drill that surges.The oil-in of direction of propulsion valve 23 is connected with the oil-out of variable pump 01 by propelling pressure recuperation valve 24 is rear.The two ends that two oil-outs of direction of propulsion valve 23 are received propelling cylinder after being connected with two overflow valve 22a, 22b respectively.The pressure signal oil of direction of propulsion valve 23 can be connected respectively two pressure-control valve 21a, 21b and pressure signal is connected to by exterior tubing on the shuttle valve of rock drilling dash valve piece;
In anti-sticking pricker valve piece 40, hammer drill rotation motor 04 is rotated in the forward pressure oil and is connected with the pressure hydraulic fluid port of two overflow valves 42,43, and the oil return opening of two overflow valves is connected with control oil return pipe after connecting respectively again a throttle orifice 45,46.Throttle orifice 46 and the junction of overflow valve 43 controlled two four-way hydraulic operated valves 44 of anti-sticking pricker valve piece, and described two four-way hydraulic operated valves 44 have been controlled direction of propulsion valve and pushed away 23 guide oil normality or the reverse operatings that enter and return handle.Another throttle orifice 45 is connected with the control port that advances the equalizing valve 34 on pressure regulating valve block 30 with the junction of overflow valve 42;
Advance in pressure regulating valve block 30, output pressure signal is connected with a hydraulic fluid port of the direction valve 31 that surges that advances the equalizing valve 34 of pressure regulating valve block 30, the overflow valve 33 that advances pressure regulating valve block 30 and propelling pressure regulating valve block 30, under the described direction valve normality of surging, can also make output pressure signal be connected with the pressure hydraulic fluid port that advances the overflow valve 34 on pressure regulating valve block 30, described in the surge control port of direction valve be connected with the guide oil that the control hammer drill on pilot-actuated valve piece 50 heavily impacts handle.
Further, can simplify anti-sticking pricker propeller auto-returned time, automatically stop the function that hammer drill impacts, the direction valve that surges in card pricker valve piece in the air, making to control the guide oil that hammer drill heavily impacts handle not controlled by it, and other are correspondingly simplified propeller and automatically reduce the methods such as pressure functional, reducing valve in rock drilling control valve piece, can be substituted by other pilot control in hydraulic system; Pilot handle, available electro-hydraulic proportional valve etc. other pilot-actuated valve substitute.
How further illustrate the present invention below in conjunction with the specific embodiment in native system practical operation realizes:
The pressure oil that variable pump 01 provides is supplied with rock drilling dash valve piece 10 as power source by P1 hydraulic fluid port, by advancing valve oil-feed port P2 again to propulsion control valve group 20 fuel feeding, in rock drilling dash valve piece 10, reducing valve 13 is by P1 hydraulic fluid port fuel feeding, and the output of reducing valve 13 is the oil sources as the pilot-actuated valve piece 50 of pilot handle by pilot control oil sources Pc hydraulic fluid port.
Hammer drill gently impacts handle 52b and is connected to by light impact guide oil C2 one end of shuttle valve 15 in rock drilling dash valve piece 10, the pressure oil that heavily impacts handle 52a in propulsion control valve group in advanced state, the other end of shuttle valve 15 is connected hammer drill and is heavily impacted guide oil C1 and be communicated in 44 commutations of two four-way hydraulic operated valves in anti-sticking pricker valve piece 40, also controlled simultaneously and advanced the direction valve 31 that surges in pressure regulating valve block 30 to commutate, excision overflow valve 32 is to advancing the control of pressure regulating valve block 30 output pressures.Heavily impact the impact that handle 52a and light impact handle 52b are controlling hammer drill, control by shuttle valve 15 direction valve 12 that surges and commutate, make to advance the output pressure signal LS2 of pressure regulating valve block to receive propulsion control valve group pressure signal LS1 above, participate in propelling pressure control.Rock drilling dash valve piece 10 inside of Fig. 2 have only represented the hammer drill pressure signal LS3 that inner hammer drill impacts, and in relevant other partial graphs of hammer drill impulsive control, do not represent.
Propelling handle 51a and propelling are returned to the operation of handle 51b by surging in anti-sticking pricker valve piece 40 after direction valve 41 controls, by advancing guide oil 20a, propelling to return to guide oil 20b and receive propulsion control valve group 20, control direction of propulsion valve 23 and commutate.
When hammer drill is not worked, 04a is without pressure for rotation motor forward, valve 41 is in the normal state as shown in Figure 2, advance the pressure oil of handle 51a and advance guide oil 20a to be communicated with, direction of propulsion valve 23 commutates, advance the hydraulic oil of valve oil-feed port P2 to enter 02A by propelling pressure recuperation valve 24, direction of propulsion valve valve 23, propelling cylinder stretches out, propelling pressure valve 21a is linked in propulsion control valve group pressure signal LS1 simultaneously, after shuttle valve 14, be loaded into the LS hydraulic fluid port of variable pump, the output pressure of control variables pump 01.Overflow valve 11 is connected with LS hydraulic fluid port, and the oil pressure relief of overflow valve 11 has been placed restrictions on high output pressure, the i.e. maximum working pressure of native system of variable pump 01.Propelling is returned to handle 51b and is communicated with to advance and returns to guide oil 20b, advances the hydraulic oil of valve oil-feed port P2 to be controlled and entered 02B by direction of propulsion valve 23, and propelling cylinder is retracted, and returns Pressure relief valve 21b simultaneously and is linked in propulsion control valve group pressure signal LS1.
When rock drilling work, hammer drill is rotated in the forward (04a fuel feeding) and works with impact simultaneously, advances handle 51a to make propelling cylinder in advancing position.Advancing under the effect of guide oil 20a, two four-way hydraulic operated valves 44 commutate, and the output of heavily impacting handle 52a is received to hammer drill and heavily impact guide oil C1, can control the commutation of the direction valve 31 that surges.
When opening, hammer drill gently impacts handle 52b work, and owing to heavily impacting handle 52a no-output pressure, the direction valve 31 that surges does not commutate.The light pressure oil that impacts handle 52b commutates through shuttle valve 15 direction valve 12 that makes to surge, and advances the output signal LS2 of pressure regulating valve block and propulsion control valve group pressure signal LS1 to be communicated with, then is connected to the LS mouth of variable pump by shuttle valve 14.The propelling pressure of the rock drilling opening of being set by overflow valve 32, the pressure of setting than overflow valve 33 and equalizing valve 34 is low, and therefore the LS pressure of variable pump 01 is determined by overflow valve 32, is the propelling pressure of lower rock drilling opening, and hammer drill is in light impact conditions.
When hammer drill heavily impacts handle 52a work, commutate by shuttle valve 15 direction valve 12 that makes to surge equally, and the direction valve 31 that surges also commutates.Overflow valve 32 and overflow valve 33 are cut off.The pressure that overflow valve 33 and equalizing valve 34 are set and the LS pressure communication of variable pump 01, the propelling pressure of hammer drill raises, and hammer drill is in heavily impacting the duty of high speed rock drilling of high propelling pressure.
In anti-sticking pricker valve piece 40, the setting pressure of overflow valve 42 is the normal rotational pressure that hammer drill is the highest, and the setting pressure of overflow valve 43 is the hammer drill rotational pressure that propeller returns, and the pressure of setting than valve 42 is much higher.
Under the duty of high speed rock drilling, if there is card pricker phenomenon, the pressure (moment of torsion) of hammer drill rotation motor 04a rises, and this pressure-loaded is to the pressure hydraulic fluid port of two overflow valves 42,43 of anti-sticking pricker valve piece 40.In the time of setting pressure higher than overflow valve 42, overflow valve 42 starts to leak, its pressure differential has been loaded on throttle orifice 45, this pressure differential is by advancing pressure regulation signal K1 to be loaded into the control mouth of equalizing valve 34, make the oil pressure relief of equalizing valve 34 advance pressure regulating valve block output pressure signal LS2 to decline in proportion, control propelling pressure recuperation valve 24 by propulsion control valve group pressure signal LS1 and make to advance the output pressure of valve group 02A to decline thereupon, reached the target of automatic reduction propelling pressure.When the pressure of K1 is enough large, equalizing valve 34 is all opened, pressure drop is 1 o'clock, and the pressure of 02A drops to zero, and propeller just stops advancing.
When the pressure of hammer drill rotation motor 04a continues to rise, during higher than the setting pressure of overflow valve 43, overflow valve 43 starts to leak, and its pressure differential has been loaded on throttle orifice 46, and two four-way hydraulic operated valves 44 are commutated, the surge commutation of direction valve 41, propelling is returned to handle 51a output and be communicated to advance and return to guide oil 20b, direction of propulsion valve 23, from advancing position to change to home position, advances the hydraulic oil of valve oil-feed port P2 and 02B to be communicated with, propelling cylinder is retracted, and hammer drill returns.Realize the control target of auto-returned.Due to the commutation of the direction valve 41 that surges, hydraulicchange-over valve 41 control ports have lost controlled pressure, two four-way hydraulic operated valve 44 returns, cut off and heavily impacted the path of handle 52a to C1, in rock drilling dash valve piece, automatically cut off the impact oil sources of hammer drill, hammer drill stops impacting.Meanwhile, the direction valve 12 that surges has lost controlled pressure return, has cut off and has advanced being connected between pressure regulating valve block output pressure signal LS2 and propulsion control valve group pressure signal LS1.Advance the output pressure LS2 of pressure regulating valve block no longer to participate in the control of propulsion control valve group 20, advance the pressure while returning to control by returning pressure valve 21b.The overflow of overflow valve 43, reached propeller auto-returned, automatically stop impacting two control targets.
Due to the effect of automatic anti-blocking pricker function, in the time of the pressure drop of hammer drill rotation motor 04a, hydraulic control system just automatically by above-mentioned contrary program recovery to heavily impacting the high speed rock drilling duty advancing with total pressure.
The invention provides a kind of novel hammer drill anti-sticking pricker control system, in the time that hammer drill rotational pressure rises, possessing hammer drill propelling cylinder pressure automatically reduces, stops outside propelling, hammer drill auto-returned, also possesses the function that automatically stops impact when hammer drill returns, with prior art comparison, control function the most complete.And this control system all adopts variable pump LS to control function, has that automatic control performance is good, the feature of Hydraulic Elements highly versatile, efficient energy-saving.
Above-described is only preferred embodiment of the present invention.Should be understood that for the person of ordinary skill of the art, under technology enlightenment provided by the present invention, as the common practise of this area, can also make other equivalent modifications and improvement, also should be considered as protection scope of the present invention.
Claims (4)
1. a hammer drill anti-sticking pricker hydraulic control system, comprise the variable pump that LS controls, rock drilling dash valve piece, propulsion control valve group, advance pressure regulating valve block, anti-sticking pricker valve piece and pilot handle control valve group, it is characterized in that: the oil-in of variable delivery side of pump and propulsion control valve group, reducing valve in rock drilling dash valve piece connects, the output of described reducing valve is as the pilot control oil sources of pilot handle, control guide oil the surging after direction valve control by anti-sticking pricker valve piece that hammer drill heavily impacts handle, with the two ends that are connected to the first shuttle valve of rock drilling impulsive control valve piece together with the guide oil of light impulsive control handle, the direction valve that surges of rock drilling dash valve piece has been controlled in the output of described shuttle valve, this direction valve that surges has been controlled again and has been advanced the output pressure signal of pressure regulating valve block whether to be connected with the pressure signal of propulsion control valve group, the two ends of the second shuttle valve of rock drilling dash valve piece are connecting pressure signal in propulsion control valve group and another hammer drill pressure signal of propulsion control valve group inside, the output of described the second shuttle valve is connected with the pressure hydraulic fluid port of the overflow valve of rock drilling dash valve piece, also connecting the LS control port of variable pump simultaneously,
Action advances oil cylinder advances and returns guide oil the surging after two position four-way valve controls through anti-sticking pricker valve piece of handle, be connected to the control end of direction of propulsion valve in propulsion control valve group, the control mouth of the direction valve that surges of anti-sticking pricker valve piece in addition that advances guide oil to be connected with action advances oil cylinder in it, the break-make of heavily impacting the guide oil of handle by this direction valve control hammer drill that surges, the oil-in of direction of propulsion valve is connected with the oil-out of variable pump by after propelling pressure recuperation valve, the two ends that two oil-outs of direction of propulsion valve are received propelling cylinder after being connected with two overflow valves respectively, the pressure signal oil of direction of propulsion valve can be connected respectively two pressure-control valves and pressure signal is connected to by exterior tubing on the second shuttle valve of rock drilling dash valve piece,
In anti-sticking pricker valve piece, the pressure hydraulic fluid port that hammer drill rotation motor is rotated in the forward pressure oil and two overflow valves is connected, the oil return opening of two overflow valves is connected with control oil return pipe after connecting respectively again a throttle orifice, two position four-way valves that surge of anti-sticking pricker valve piece have been controlled in the junction of throttle orifice and overflow valve, the control of described two four-way hydraulic operated valves direction of propulsion valve advance and return guide oil normality or the reverse operating of handle, the junction of another throttle orifice and overflow valve with propelling pressure regulating valve block on the control port of equalizing valve be connected;
Advance in pressure regulating valve block, output pressure signal is connected with a hydraulic fluid port of the direction valve that surges that advances the equalizing valve of pressure regulating valve block, the overflow valve that advances pressure regulating valve block and propelling pressure regulating valve block, under the described direction valve normality of surging, can also make output pressure signal be connected with the pressure hydraulic fluid port that advances the second overflow valve on pressure regulating valve block, the control port of the direction valve that surges is connected with the guide oil that the control hammer drill on rock drilling control valve piece heavily impacts handle.
2. a kind of hammer drill anti-sticking pricker hydraulic control system according to claim 1, it is characterized in that: can simplify anti-sticking pricker propeller auto-returned time, automatically stop the function that hammer drill impacts, the direction valve that surges in card pricker valve piece in the air, make to control the guide oil that hammer drill heavily impacts handle and not controlled by it, and other are correspondingly simplified propeller and automatically reduce the methods such as pressure functional.
3. a kind of hammer drill anti-sticking pricker hydraulic control system according to claim 1, is characterized in that: the reducing valve in rock drilling control valve piece, can be substituted by other pilot control in hydraulic system.
4. a kind of hammer drill anti-sticking pricker hydraulic control system according to claim 1, is characterized in that: pilot handle, other the pilot-actuated valve such as available electro-hydraulic proportional valve substitutes.
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| CN201410071094.1A CN103821451B (en) | 2014-02-28 | 2014-02-28 | Hydraulic control system of anti-clamping drill rod of rock drilling machine |
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| CN201410071094.1A CN103821451B (en) | 2014-02-28 | 2014-02-28 | Hydraulic control system of anti-clamping drill rod of rock drilling machine |
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| CN103821451B CN103821451B (en) | 2017-04-12 |
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| CN106438533A (en) * | 2016-11-12 | 2017-02-22 | 湘潭大学 | Automatic anti-clamping hydraulic control system of electric proportional control rock drill |
| CN105156018B (en) * | 2015-08-05 | 2017-06-30 | 江西蓝翔重工有限公司 | A kind of hydraulic gate control system by Power Control anti-sticking pricker |
| CN107939757A (en) * | 2017-12-29 | 2018-04-20 | 徐州徐工铁路装备有限公司 | A kind of rock drilling control system of drill jumbo |
| CN108457920A (en) * | 2016-09-27 | 2018-08-28 | 陈晓辉 | A kind of anti-deflection control method |
| CN108612516A (en) * | 2018-06-07 | 2018-10-02 | 中国铁建重工集团有限公司 | A kind of rock drilling machine and its hydraulic control valve group |
| CN109236764A (en) * | 2018-12-10 | 2019-01-18 | 中国铁建重工集团有限公司 | The impulsive control hydraulic system of drill jumbo |
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| CN106438533B (en) * | 2016-11-12 | 2017-11-07 | 湘潭大学 | A kind of electric proportional control formula rock drill automatic anti-blocking pricker hydraulic control system |
| CN107939757A (en) * | 2017-12-29 | 2018-04-20 | 徐州徐工铁路装备有限公司 | A kind of rock drilling control system of drill jumbo |
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| CN109236764A (en) * | 2018-12-10 | 2019-01-18 | 中国铁建重工集团有限公司 | The impulsive control hydraulic system of drill jumbo |
| CN113638943A (en) * | 2021-08-12 | 2021-11-12 | 中国铁建重工集团股份有限公司 | Impact hydraulic control system and drill jumbo |
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