CN107620762A - Rock drill and its Automatic hydraulic control system - Google Patents
Rock drill and its Automatic hydraulic control system Download PDFInfo
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- CN107620762A CN107620762A CN201711022438.XA CN201711022438A CN107620762A CN 107620762 A CN107620762 A CN 107620762A CN 201711022438 A CN201711022438 A CN 201711022438A CN 107620762 A CN107620762 A CN 107620762A
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- reversing valve
- proportional reversing
- oil sources
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- 239000011435 rock Substances 0.000 title claims abstract description 76
- 238000009527 percussion Methods 0.000 claims abstract description 37
- 239000002828 fuel tank Substances 0.000 claims abstract description 26
- 230000008859 change Effects 0.000 claims abstract description 25
- 239000012530 fluid Substances 0.000 claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 5
- 239000003921 oil Substances 0.000 abstract description 81
- 239000010720 hydraulic oil Substances 0.000 abstract description 4
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 19
- 238000011144 upstream manufacturing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The invention discloses a kind of Automatic hydraulic control system of rock drill, including pilot control oil sources, impact oil sources, turn round oil sources, promote oil sources, percussion mechanism, rotary motor and propelling cylinder, propulsion choke valve is provided between propelling cylinder rod chamber and propulsion oil sources, the both ends of choke valve are promoted to be respectively communicated with two hydraulic control hydraulic fluid ports of the first hydraulic control proportional reversing valve, pipeline between the actuator port connection pilot control oil sources and percussion power pilot operated valve device of first hydraulic control proportional reversing valve, first hydraulic control proportional reversing valve can be according to the pressure change switch operating position for promoting choke valve both ends, to change the on off operating mode of the first hydraulic control proportional reversing valve and fuel tank.It is accurate to obtain geology state by the pressure change of hydraulic oil, and then accurate quickly control device makes corresponding change, realizes Automated condtrol by hydraulic control, can prevent card pricker stability and high efficiency.The invention also discloses a kind of rock drill for including above-mentioned Automatic hydraulic control system.
Description
Technical field
The present invention relates to rock drilling equipment field, more particularly to a kind of Automatic hydraulic control system of rock drill.In addition, this
Invention further relates to a kind of rock drill for including above-mentioned Automatic hydraulic control system.
Background technology
Hydraulic gate is the important hard rock drilling equipment in modern drill+blast tunnel construction, due to cutting rate
It hurry up, rock drilling power is big, efficiency of construction is high, noise radiation is small and the easy master for realizing the advantages that automating, occupying rock drill market
Lead status.Hydraulic gate is a kind of rotary impact type drilling rock drill, and when carrying out rock drilling operation, rock drill propelling pressure is too
The small sky that will produce is beaten, and not only rock penetration performance reduces, and the service life of rock drill will also shorten；Rock drill propelling pressure is easy when too big
Bore bit is deviateed target location, while will also accelerate the abrasion of drill bit.In addition, rock drill drives more drilling rods to carry out deep and long hole chisel
Rock operation, rock geology complicated condition is changeable, such as quality inequality, crack, lava, and the mechanics nonuniformity of rock easily makes drill bit
Deviate drilling target track, cause card pricker phenomenon, meanwhile, the not smooth also easy card pricker of rock quarrel discharge in drilling, therefore, card pricker phenomenon
The randomness of appearance is stronger.To meet the rock drilling operation under the conditions of a variety of rock geologies, rock drill hydraulic control system must have
It is standby that automatic rock drilling and anti-sticking pricker ability are carried out according to geomechanical condition, should especially possess pre- in advance to the card pricker situation that will appear from
Survey and handle.
Method of controlling switch is used in the prior art, and due to being digital output modul form, propulsive force can not be according to revolution
The change of the moment of resistance and change, anti-sticking pricker is ineffective, particularly in the poor rock stratum of geological conditions during rock drilling bore operation,
Commutation loop is promoted frequently to commutate always, rock penetration performance is low.
Therefore, how to provide it is a kind of can stability and high efficiency prevent that the Automatic hydraulic control system of card pricker from being people in the art
The current technical issues that need to address of member.
The content of the invention
It is an object of the invention to provide a kind of Automatic hydraulic control system of rock drill, can prevent card stability and high efficiency
Pricker., being capable of stability and high efficiency it is a further object of the present invention to provide a kind of rock drill for including above-mentioned Automatic hydraulic control system
Prevent card pricker.
In order to solve the above technical problems, the present invention provides a kind of Automatic hydraulic control system of rock drill, including guide's control
Liquefaction source, impact oil sources, revolution oil sources, propulsion oil sources, percussion mechanism, rotary motor and propelling cylinder, the impact oil sources
Percussion power pilot operated valve device, the hydraulic control of the percussion power pilot operated valve device are provided between the oil inlet of oil-out and the percussion mechanism
Mouth connects the pilot control oil sources, and propulsion choke valve is provided between the propelling cylinder rod chamber and propulsion oil sources, described
The both ends of choke valve are promoted to be respectively communicated with two hydraulic control hydraulic fluid ports of the first hydraulic control proportional reversing valve, the first hydraulic control ratio commutation
One actuator port of valve connects the pipeline between the pilot control oil sources and the percussion power pilot operated valve device, first liquid
Another actuator port connection fuel tank of proportional reversing valve is controlled, the first hydraulic control proportional reversing valve can save according to described promote
The pressure change switch operating position at valve both ends is flowed, to change the on off operating mode of the first hydraulic control proportional reversing valve and fuel tank.
Preferably, it is provided with revolution throttling between the oil-out of the revolution oil sources and the oil inlet of the rotary motor
Valve, the both ends of the rotary throttle are respectively communicated with two hydraulic control hydraulic fluid ports of the second hydraulic control proportional reversing valve, second hydraulic control
The oil inlet and oil return opening of proportional reversing valve are respectively communicated with the propulsion oil sources, two works of the second hydraulic control proportional reversing valve
The rod chamber and rodless cavity of the propelling cylinder are respectively communicated with as hydraulic fluid port, the second hydraulic control proportional reversing valve can be according to described
The pressure change switch operating position at rotary throttle both ends, to change the working condition of the propelling cylinder.
Preferably, guide is also disposed between the pilot control oil sources and the percussion power pilot operated valve device and starts electricity
Control reversal valve, the first threeway hydraulic control pressure-reducing valve and first throttle valve, the hydraulic control mouth connection institute of the first threeway hydraulic control pressure-reducing valve
State the rodless cavity of propelling cylinder, the exit of the first throttle valve is additionally provided with that guide's pressure release for connecting fuel tank is automatically controlled to change
To valve and it is low wash a mouthful overflow valve open, be additionally provided with low pressure relief valve between the first hydraulic control proportional reversing valve and fuel tank.
Preferably, between the hydraulic control mouth of described second hydraulic control proportional reversing valve one end and one end of the rotary throttle according to
It is secondary to be provided with second throttle, auxiliary hydraulic control proportional reversing valve, the first auxiliary electric control reversal valve, the second hydraulic control ratio commutation
The second threeway hydraulic control pressure-reducing valve and are disposed between the hydraulic control mouth of the valve other end and the other end of the rotary throttle
Two auxiliary electric control reversal valves.
Preferably, it is provided with the 3rd threeway between the rodless cavity of the propelling cylinder and the second ratio pilot operated directional control valve
Hydraulic control pressure-reducing valve.
Preferably, the percussion mechanism includes impact oil cylinder, impact reversal valve and accumulator.
Preferably, the first hydraulic control proportional reversing valve is specially two-position two-way hydraulic control proportional reversing valve, first liquid
It is specially 3-position 4-way hydraulic control proportional reversing valve to control proportional reversing valve, and it is specially two-position three way that the guide, which starts electric control reversing valve,
Electric control reversing valve, guide's pressure release electric control reversing valve are specially bi-bit bi-pass electric control reversing valve, and the auxiliary hydraulic control ratio is changed
It is specially two-position two-way hydraulic control proportional reversing valve to valve, the first auxiliary electric control reversal valve and second auxiliary electric control commutation
Valve is specially two-position three way electric control reversing valve.
Preferably, the propulsion oil sources also connects the propelling cylinder by automatically controlled proportional reversing valve.
Preferably, the automatically controlled proportional reversing valve is specially the automatically controlled proportional reversing valve of 3-position 4-way.
The present invention also provides a kind of rock drill, including Automatic hydraulic control system, it is characterised in that the hydraulic pressure is controlled automatically
System processed is specially the Automatic hydraulic control system described in above-mentioned any one.
The present invention provides a kind of Automatic hydraulic control system of rock drill, including pilot control oil sources, impact oil sources, revolution
Oil sources, oil sources, percussion mechanism, rotary motor and propelling cylinder are promoted, impact the oil-out of oil sources and the oil inlet of percussion mechanism
Between be provided with percussion power pilot operated valve device, the hydraulic control mouth connection pilot control oil sources of percussion power pilot operated valve device, propelling cylinder has bar
Propulsion choke valve is provided between chamber and propulsion oil sources, promotes the both ends of choke valve to be respectively communicated with the first hydraulic control proportional reversing valve
Two hydraulic control hydraulic fluid ports, the actuator port connection pilot control oil sources and percussion power pilot operated valve device of the first hydraulic control proportional reversing valve
Between pipeline, the first hydraulic control proportional reversing valve another actuator port connection fuel tank, the first hydraulic control proportional reversing valve can
According to the pressure change switch operating position for promoting choke valve both ends, to change the break-make shape of the first hydraulic control proportional reversing valve and fuel tank
State.
When running into empty geology during rock drilling, propelling cylinder stretches out speed and stretches out speed much larger than normal promote, and pushes away
Enter choke valve pressure at two ends difference and become big, and then control the first hydraulic control proportional reversing valve to open connection fuel tank, make pilot control oil sources
In hydraulic oil flow back to fuel tank, pressure step-down at the hydraulic control mouth of percussion power pilot operated valve device, reduce the fuel feeding to percussion mechanism, reduce
Surge makes rock drill be in tip-tap to convince by patient analysis to poroid state, and when drill bit bumps against next wall, the first hydraulic control proportional reversing valve is opened
Degree tapers into, and surge increase, rock drill reverts to normal perforate rock drilling state.
It is accurate to obtain geology state by the pressure change of hydraulic oil, and then accurate quickly control device is made accordingly
Change, Automated condtrol is realized by hydraulic control, card pricker can be prevented stability and high efficiency.
The present invention also provides a kind of rock drill for including above-mentioned Automatic hydraulic control system, because above-mentioned hydraulic pressure automatically controls
System has above-mentioned technique effect, and above-mentioned rock drill should also have same technique effect, no longer be discussed in detail herein.
Brief description of the drawings
Fig. 1 is a kind of hydraulic schematic diagram of embodiment of Automatic hydraulic control system provided by the present invention.
Embodiment
The core of the present invention is to provide a kind of Automatic hydraulic control system of rock drill, can prevent card stability and high efficiency
Pricker.Another core of the present invention is to provide a kind of rock drill for including above-mentioned Automatic hydraulic control system, being capable of stability and high efficiency
Prevent card pricker.
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Fig. 1 is refer to, Fig. 1 is a kind of hydraulic pressure of embodiment of Automatic hydraulic control system provided by the present invention
Schematic diagram.
A kind of Automatic hydraulic control system of rock drill of specific embodiment of the invention offer, including pilot control oil sources 1,
Impact oil sources 2, revolution oil sources 3, oil sources 4, percussion mechanism 5, rotary motor 6 and propelling cylinder 7, wherein percussion mechanism 5 is promoted to wrap
Include impact oil cylinder, impact reversal valve and accumulator.Also total a hydraulic pump and fuel tank can be used as oil sources.
Impact between the oil-out of oil sources 2 and the oil inlet 5c of percussion mechanism 5 and be provided with percussion power pilot operated valve device 8, impact
The hydraulic control mouth 8c connection pilot controls oil sources 1 of power pilot operated valve device 8, is provided between the rod chamber of propelling cylinder 7 and propulsion oil sources 4 and pushes away
Enter choke valve 9, promote the both ends of choke valve 9 to be respectively communicated with two hydraulic control hydraulic fluid ports of the first hydraulic control proportional reversing valve 10, the first liquid
The pipeline between the actuator port 10a connection pilot controls oil sources 1 of proportional reversing valve 10 and percussion power pilot operated valve device 8 is controlled,
Another actuator port 10b connection fuel tanks of first hydraulic control proportional reversing valve 10, the first hydraulic control proportional reversing valve 10 being capable of basis
The pressure change switch operating position at the both ends of choke valve 9 is promoted, to change the break-make shape of the first hydraulic control proportional reversing valve 10 and fuel tank
State.
Turn round between the oil-out of oil sources 3 and the oil inlet 6a of rotary motor 6 and be provided with rotary throttle 11, revolution throttling
The both ends of valve 11 are respectively communicated with two hydraulic control hydraulic fluid ports of the second hydraulic control proportional reversing valve 12, and the second hydraulic control proportional reversing valve 12 enters
Hydraulic fluid port 12p and oil return opening 12t, which is respectively communicated with, promotes oil sources 4, the actuator port 12a connections of the second hydraulic control proportional reversing valve 12
The rod chamber of propelling cylinder 7, the second hydraulic control proportional reversing valve 12 another actuator port 12b connection propelling cylinder 7 without bar
Chamber, the second hydraulic control proportional reversing valve 12 can be pushed away according to the pressure change switch operating position at the both ends of rotary throttle 11 with changing
Enter the working condition of oil cylinder 7.
Guide is also disposed with order to realize accurate control, between pilot control oil sources 1 and percussion power pilot operated valve device 8 to open
Dynamic electric control reversing valve 13, the first threeway hydraulic control pressure-reducing valve 14 and first throttle valve 15, the hydraulic control of the first threeway hydraulic control pressure-reducing valve 14
Mouth 14c connects the rodless cavity of propelling cylinder 7, and the guide for connecting fuel tank is additionally provided with the outlet 15b of first throttle valve 15
Pressure release electric control reversing valve 16 and it is low wash mouthful overflow valve 17 open, be additionally provided with low pressure between the first hydraulic control proportional reversing valve 10 and fuel tank
Overflow valve 18.
It is disposed between the hydraulic control mouth of the one end of the second hydraulic control proportional reversing valve 12 and one end 11b of rotary throttle 11
Second throttle 19, auxiliary hydraulic control proportional reversing valve 20, the first auxiliary electric control reversal valve 21, the second hydraulic control proportional reversing valve 12 are another
The second threeway hydraulic control pressure-reducing valve 22 and second is disposed between the hydraulic control mouth of one end and the other end 11a of rotary throttle 11
Auxiliary electric control reversal valve 23.The 3rd threeway hydraulic control is provided between the rodless cavity of propelling cylinder 7 and the second ratio pilot operated directional control valve
Pressure-reducing valve 24.
Above-mentioned each valve is in order to which the function of rock drill is better achieved, and according to circumstances can increase and decrease or change above-mentioned each valve
Door, specifically, the first hydraulic control proportional reversing valve 10 specially two-position two-way hydraulic control proportional reversing valve, the first hydraulic control proportional reversing valve
10 be specially 3-position 4-way hydraulic control proportional reversing valve, and it is specially two-position three way electric control reversing valve that guide, which starts electric control reversing valve 13,
Guide's pressure release electric control reversing valve 16 is specially bi-bit bi-pass electric control reversing valve, and auxiliary hydraulic control proportional reversing valve 20 is specially two two
Logical hydraulic control proportional reversing valve, the first auxiliary electric control reversal valve 21 and the second auxiliary electric control reversal valve 23 are specially that two-position three way is automatically controlled
Reversal valve, the type of each valve also can be according to circumstances adjusted, within protection scope of the present invention.
On the basis of the Automatic hydraulic control system that above-mentioned each embodiment provides, oil sources 4 is promoted also to pass through electricity
Control proportional reversing valve 25 and connect propelling cylinder 7, body is the automatically controlled proportional reversing valve of 3-position 4-way.
When rock drill is in off working state, guide's startup electric control reversing valve 13 is not charged, the pressure of pilot control oil sources
Oil can not depressurize the hydraulic control mouth 8c for flowing to percussion power pilot operated valve device 8 through the first threeway hydraulic control pressure-reducing valve 14, and now, guide starts electricity
The actuator port 13a and oil return opening 13t of control reversal valve 13 are connected and oil return box, the hydraulic control mouth 8c pressure of percussion power pilot operated valve device 8
Close to zero, system is in low and rushes state.
When rock drill is in bore state, the pressure oil of pilot control oil sources flows to after guide starts electric control reversing valve 13
First threeway hydraulic control pressure-reducing valve 14, the pressure of the rodless cavity side of propelling cylinder 7 are fed back to the liquid of the first threeway hydraulic control pressure-reducing valve 14
Mouth 14c is controlled, the output pressure of the first threeway hydraulic control pressure-reducing valve 14 is determined by hydraulic control mouth 14c pressure.Pressure oil is through the first threeway
Hydraulic control pressure-reducing valve 14 depressurize after again by flowing to the hydraulic control mouth 8c of percussion power pilot operated valve device 8 after first throttle valve 15.Percussion power
Pilot operated valve device 8 is opened, and the pressure oil of impact oil sources is entered percussion mechanism 5, realizes impact operation.
When rock drill is in the tip-tap perforate stage, surge requires relatively low, the band of now guide's pressure release electric control reversing valve 16
Electricity, the pressure oil of pilot control oil sources 1 start electric control reversing valve 13, the first threeway hydraulic control pressure-reducing valve 14, first throttle through guide
Fuel tank is flowed back to from low mouthful overflow valve 17 of washing open after valve 15 and guide's pressure release electric control reversing valve 16, rock drill is in low and washes pilot hole open
State.
Described rock drill impact system, the 10-a mouths of solenoid directional control valve 10 are connected to the 17-p mouths of external control pressure-reducing valve 17,
The outside control mouth 17-c of external control pressure-reducing valve 17 is connected to the rodless cavity oil circuit of propelling cylinder, 17-a mouths and the flow controller 18 of pressure-reducing valve 17
The connection of 18-a mouths, the 18-b mouths of flow controller 18 respectively with the 11-a mouths of solenoid directional control valve 11 and hydraulic control proportional direction valve 12
12-a mouths connect, and the 11-b mouths of solenoid directional control valve 11 connect with the low 4-a mouths for rushing overflow valve 4, the 12- of hydraulic control proportional direction valve 12
B mouths are connected with the 5-a mouths of low-pressure overflow valve 5, the 10-t mouths of solenoid directional control valve 10 and the 11-t mouths of solenoid directional control valve 11, hydraulic control
The 12-t mouths of proportional direction valve 12 are connected and are connected to fuel tank together.
When bit of rock drilling machine pierce one it is empty when, because load is small in front of drill bit, drill bit will be quickly propelled until in cavity
Rock wall, the usual out-of-flatness of rock wall, drill bit is hit will produce a component, structure after empty rock wall in radial direction
The relatively low elongate drill rod of rigidity, by flexural deformation, makes drill bit deviate predetermined drilling trace under radial load effect.When drill bit is inclined
Crooked stem deformation will be blocked after creeping into certain depth from desired trajectory, now, drilling rod can neither promote, and can not retract,
Generate card pricker phenomenon.When running into empty geology, propelling cylinder 7 stretches out speed and stretches out speed much larger than normal promote, this
When promote the upstream and downstream pressure differential of choke valve 9 to become big, upstream and downstream pressure feeds back to the both ends of the first hydraulic control proportional reversing valve 10 respectively,
Drive the first hydraulic control proportional reversing valve 10 to be gradually opened, now, flow to the hydraulic control mouth 8c of percussion power pilot operated valve device 8 pressure oil originally
Fuel tank is flowed back to through low pressure relief valve 18, the aperture of percussion power pilot operated valve device 8 diminishes, and hydraulic oil cannot be introduced into percussion mechanism 5, percussive pressure
Power step-down, rock drill are in tip-tap and convinced by patient analysis to poroid state.The load acted on when drill bit bumps against next wall on drill bit is again extensive
It is multiple into larger, promote the upstream and downstream pressure differential of choke valve 9 to diminish, the first hydraulic control proportional reversing valve 10 of driving progressively closes off, ballistic work
Pressure at the hydraulic control mouth 8c of rate pilot operated valve device 8 returns to normal, and surge gradually increases, and rock drill slowly reverts to normal hole punch
Rock state.
The pressure oil that revolution oil sources 3 provides flows through the entrance 6a that rotary motor 6 is flowed to after rotary throttle 11, and through revolution
Motor 6 exports 6b and flows directly into fuel tank.The load of rotary motor 6 feeds back to by the pressure differential before and after rotary throttle 11
Two hydraulic control proportional reversing valves 12, the second hydraulic control proportional reversing valve 12 is set to automatically control the second liquid according to the load of rotary motor 6
The aperture of proportional reversing valve 12 is controlled, so as to realize that propelling cylinder 7 enters the control function of flow.
One end hydraulic fluid port 11a of rotary throttle 11 is connected with the oil inlet 23p of the second auxiliary electric control reversal valve 23, the second auxiliary
The oil return opening 23t of electric control reversing valve 23 is connected to fuel tank together with the oil return opening 11t of rotary throttle 11, and the second auxiliary electric control changes
The oil inlet of the second threeway hydraulic control pressure-reducing valve 22 is connected to the actuator port 23a of valve 23, the second threeway hydraulic control pressure-reducing valve 22 returns
Hydraulic fluid port is connected to fuel tank, and the actuator port of the second threeway hydraulic control pressure-reducing valve 22 is connected to one end of the second hydraulic control proportional reversing valve 12
Hydraulic control mouth 12 II.
The other end hydraulic fluid port 11b of rotary throttle 11 is connected to the oil inlet 21p of the first auxiliary electric control reversal valve 21, and first
The actuator port 21a of auxiliary electric control reversal valve 21 aids in aiding in an actuator port 20a of hydraulic control proportional reversing valve 20 to be connected
Another actuator port 20b connections 19 1 hydraulic fluid port 19a of second throttle of hydraulic control proportional reversing valve 20, from second throttle 19
Another hydraulic fluid port 19b mouths respectively with the other end hydraulic control mouth 12 I of rotary throttle 12 and an actuator port phase of flow controller
Even, another actuator port connection fuel tank of flow controller.Above-mentioned part forms a hydraulic bridge type loop, plays and stablizes the second liquid
Control the effect of the hydraulic control mouth pressure of proportional reversing valve 12.
When rotary motor 6, which loads, to be reduced, rotary motor speed becomes big, by the fluid of rotary throttle 11 before and after it
Larger pressure differential is produced, now, the pressure oil at the Upstream Interface 11a of rotary throttle 11 is through each valve function in the second liquid
II end pilot port of proportional reversing valve 12 is controlled, its value is more than pressure value of the I end pilot port after throttling, the commutation of the second hydraulic control ratio
Valve 12 is in II end on-state, promotes the fluid in loop after the oil inlet 12p of the second hydraulic control proportional reversing valve 12 is flowed into
The oil inlet 24p of the 3rd threeway hydraulic control pressure-reducing valve 24 is flowed to by an actuator port 12b mouth, fluid is flowed after decompression by 24a mouths
To the rodless cavity of propelling cylinder 7, the fluid of rod chamber, which flows through, to be flowed to the second hydraulic control ratio after the propulsion choke valve 9 in oil return line and changes
To another actuator port 12a of valve 12, and fuel tank is flowed back to from oil return opening 12t.
When rotary motor 6 loads very big and rotational speed close to zero, the logical oil mass of rotary throttle 11 is smaller to be made
It is also smaller to obtain its front and rear pressure differential, now, the pressure oil at the Upstream Interface 11a of rotary throttle 11 is made after the decompression of each valve
For II end pilot port of the second hydraulic control proportional reversing valve 12, its value is less than pressure value of the I end pilot port after throttling, the second liquid
Control proportional reversing valve 12 be in I end on-state, promote the fluid in loop by the second hydraulic control proportional reversing valve 12 another
Actuator port 12a mouths flow to the rod chamber of propelling cylinder 7, and the fluid of rodless cavity flows through the unidirectional of the 3rd threeway hydraulic control pressure-reducing valve 24
The 12b mouths of the second hydraulic control proportional reversing valve 12 are flowed back to after valve, and oil is flowed back to from the oil return opening 12t of the second hydraulic control proportional reversing valve 12
Case.
And it is a bit of to deviate centre position into certain degree of overlapping, i.e. valve element for the spool design of the second hydraulic control proportional reversing valve 12
Inside no fluid passes through.When the fast card pricker of rock drill, propelling cylinder 7 can not promote further along.But now drill bit is also continuous
Ground shock waves rock wall, and the rock wall before bit of rock drilling machine is rigid, in the continuous impact process of drill bit, rock is not by
Disconnected to peel off, chisel edge will constantly diminish with rock wall contact surface after rock peels off, and cause rock drill to turn round frictional resistance moment
Constantly diminish, rock drill rotary motor 6 recovers the fast rotation of normal operating conditions again, and therefore, rock drill is not in card pricker
Phenomenon.
Propelling cylinder 7 can also realize expanding-contracting action during to ensure that rock drill rotary motor does not rotate, in loop is promoted simultaneously
The automatically controlled proportional reversing valve 25 that a Median Function is " O " type is joined, an actuator port 25a of automatically controlled proportional reversing valve 25 connects
The rodless cavity of logical propelling cylinder 7, the rod chamber of another actuator port 25b connection propelling cylinders 7 of automatically controlled proportional reversing valve 25,
When rock drill carries out normal drill operation, automatically controlled proportional reversing valve 25 is in middle position, when having other to need, automatically controlled proportional reversing valve
25 are in other working positions.
By the rock drill Automatic hydraulic control system with ratio function, throttled using rotary throttle 11 caused
Pressure differential controls the aperture of the second hydraulic control proportional reversing valve 12, and when revolution load is small, rotary motor 6 rotating speed is high, passes through rotary joint
The flow of stream valve 11 is big, and now the pressure differential before and after rotary throttle 11 also increases therewith.In the oil circuit of rock drill rotary motor 6
The front and rear sides pressure of rotary throttle 11 be fed back on the valve element of the second hydraulic control proportional reversing valve 12 and with the second hydraulic control ratio
Hookean spring inside reversal valve 12 reaches dynamic balance, makes valve element aperture proportional to the rear and front end pressure differential of rotary throttle 11
Relation；Propelling cylinder 7 is kept without the 3rd threeway hydraulic control pressure-reducing valve 24 control propelling cylinder 7 rodless cavity pressure in chamber bar side oil circuit
For certain value, in the case that pressure is also fixed before the second hydraulic control proportional reversing valve 12, make the second hydraulic control proportional reversing valve 12 with
3rd threeway hydraulic control pressure-reducing valve 24 1, which works, forms a hydraulic control proportional reversing valve with pressure compensation, realizes basis and returns
Turn the function of the proportional control fltting speed of pressure difference before and after rotary throttle 11 in the loop of motor 6；Effectively to avoid stratum hollow
Hole region exist cause rock drill fast forwarded through in cavity and bump against empty wall make drill bit radially outward force effect under partially
From target trajectory, there is card pricker phenomenon, be also additionally arranged in the rod chamber lateral line of propelling cylinder 7 and promote choke valve 9, from propulsion
The first hydraulic control proportional reversing valve 10 is given in the upstream and downstream pressure force feedback of choke valve 9, and surge is continuously controlled according to fltting speed
Change, make to drill out a pilot hole in empty wall during the bit of rock drilling machine empty wall of shock with low surge, drilling rod passes through sky
Crept into behind hole along pilot hole direction, avoid card pricker phenomenon occur because drill bit deviates target trajectory.The specific embodiment of the invention
Middle all hydraulic valve is standard hydraulic valve, and in the absence of special hydraulic valve piece, system constructing easily realizes that cost is relatively low.
Except above-mentioned Automatic hydraulic control system, embodiment of the invention, which also provides one kind, includes above-mentioned hydraulic pressure certainly
The rock drill of autocontrol system, the structure of other each several parts of the rock drill refer to prior art, repeat no more herein.
Rock drill provided by the present invention and its Automatic hydraulic control system are described in detail above.Herein should
The principle and embodiment of the present invention are set forth with specific case, the explanation of above example is only intended to help and managed
Solve the method and its core concept of the present invention.It should be pointed out that for those skilled in the art, do not departing from
On the premise of the principle of the invention, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into this hair
In bright scope of the claims.
Claims (10)
1. a kind of Automatic hydraulic control system of rock drill, including pilot control oil sources (1), impact oil sources (2), revolution oil sources
(3) oil sources (4), percussion mechanism (5), rotary motor (6) and propelling cylinder (7), are promoted, it is characterised in that the impact oil sources
(2) percussion power pilot operated valve device (8), the percussion power are provided between oil-out and the oil inlet of the percussion mechanism (5)
The hydraulic control mouth of pilot operated valve device (8) connects the pilot control oil sources (1), propelling cylinder (7) rod chamber with promote oil sources (4) it
Between be provided with promote choke valve (9), it is described promote choke valve (9) both ends be respectively communicated with the first hydraulic control proportional reversing valve (10)
Two hydraulic control hydraulic fluid ports, an actuator port of the first hydraulic control proportional reversing valve (10) connect the pilot control oil sources (1)
Pipeline between the percussion power pilot operated valve device (8), another actuator port of the first hydraulic control proportional reversing valve (10)
Fuel tank is connected, the first hydraulic control proportional reversing valve (10) can cut according to the pressure change at described propulsion choke valve (9) both ends
Change jobs position, to change the on off operating mode of the first hydraulic control proportional reversing valve (10) and fuel tank.
2. Automatic hydraulic control system according to claim 1, it is characterised in that the oil-out of the revolution oil sources (3)
Rotary throttle (11), the both ends point of the rotary throttle (11) are provided between the oil inlet of the rotary motor (6)
Two hydraulic control hydraulic fluid ports of the second hydraulic control proportional reversing valve (12), the oil inlet of the second hydraulic control proportional reversing valve (12) are not connected
The propulsion oil sources (4), two actuator ports difference of the second hydraulic control proportional reversing valve (12) are respectively communicated with oil return opening
The rod chamber and rodless cavity of the propelling cylinder (7) are connected, the second hydraulic control proportional reversing valve (12) can be according to described time
Turn the pressure change switch operating position at choke valve (11) both ends, to change the working condition of the propelling cylinder (7).
3. Automatic hydraulic control system according to claim 2, it is characterised in that the pilot control oil sources (1) and institute
State and guide is also disposed between percussion power pilot operated valve device (8) starts electric control reversing valve (13), the first threeway hydraulic control pressure-reducing valve
(14) and first throttle valve (15), the hydraulic control mouth of the first threeway hydraulic control pressure-reducing valve (14) connect the propelling cylinder (7)
Rodless cavity, the exit of the first throttle valve (15) are additionally provided with guide's pressure release electric control reversing valve (16) for connecting fuel tank
A mouthful overflow valve (17) is washed open with low, and the first hydraulic control proportional reversing valve (10) is additionally provided with low pressure relief valve between fuel tank
(18)。
4. Automatic hydraulic control system according to claim 3, it is characterised in that the second hydraulic control proportional reversing valve
(12) second throttle (19), auxiliary liquid are disposed between one end of the hydraulic control mouth of one end and the rotary throttle (11)
Control proportional reversing valve (20), the first auxiliary electric control reversal valve (21), the liquid of the second hydraulic control proportional reversing valve (12) other end
The second threeway hydraulic control pressure-reducing valve (22) and second auxiliary is disposed between control mouth and the other end of the rotary throttle (11)
Help electric control reversing valve (23).
5. Automatic hydraulic control system according to claim 4, it is characterised in that the rodless cavity of the propelling cylinder (7)
The 3rd threeway hydraulic control pressure-reducing valve (24) is provided between the second ratio pilot operated directional control valve.
6. Automatic hydraulic control system according to claim 5, it is characterised in that the percussion mechanism (5) includes impact
Oil cylinder, impact reversal valve and accumulator.
7. Automatic hydraulic control system according to claim 6, it is characterised in that the first hydraulic control proportional reversing valve
(10) it is specially two-position two-way hydraulic control proportional reversing valve, the first hydraulic control proportional reversing valve (10) is specially 3-position 4-way hydraulic control
Proportional reversing valve, it is specially two-position three way electric control reversing valve that the guide, which starts electric control reversing valve (13), guide's pressure release electricity
It is specially bi-bit bi-pass electric control reversing valve to control reversal valve (16), and the auxiliary hydraulic control proportional reversing valve (20) is specially bi-bit bi-pass
Hydraulic control proportional reversing valve, the first auxiliary electric control reversal valve (21) and the second auxiliary electric control reversal valve (23) are specially two
Position threeway electric control reversing valve.
8. according to the Automatic hydraulic control system described in claim 1 to 7 any one, it is characterised in that the propulsion oil sources
(4) propelling cylinder (7) is also connected by automatically controlled proportional reversing valve (25).
9. Automatic hydraulic control system according to claim 8, it is characterised in that automatically controlled proportional reversing valve (25) tool
Body is the automatically controlled proportional reversing valve of 3-position 4-way.
10. a kind of rock drill, including Automatic hydraulic control system, it is characterised in that the Automatic hydraulic control system is specially
Automatic hydraulic control system described in claim 1 to 9 any one.
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| CN201711022438.XA CN107620762B (en) | 2017-10-27 | 2017-10-27 | Rock drill and hydraulic automatic control system thereof |
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| CN113494492A (en) * | 2021-08-03 | 2021-10-12 | 中国铁建重工集团股份有限公司 | Hydraulic system for preventing drill rod from being stuck in solution cavity and rock drilling trolley |
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