CN104653529A - System of drill jumbo for preventing drill bit from being stuck in karst cave - Google Patents
System of drill jumbo for preventing drill bit from being stuck in karst cave Download PDFInfo
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- CN104653529A CN104653529A CN201510073402.9A CN201510073402A CN104653529A CN 104653529 A CN104653529 A CN 104653529A CN 201510073402 A CN201510073402 A CN 201510073402A CN 104653529 A CN104653529 A CN 104653529A
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- propelling
- impact
- unloading
- solution cavity
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- 239000011435 rock Substances 0.000 claims abstract description 79
- 239000000945 filler Substances 0.000 claims description 35
- 230000009467 reduction Effects 0.000 claims description 29
- 230000008859 change Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 76
- 230000003116 impacting effect Effects 0.000 description 29
- 238000004080 punching Methods 0.000 description 16
- 239000012530 fluid Substances 0.000 description 15
- 230000002265 prevention Effects 0.000 description 9
- 230000000881 depressing effect Effects 0.000 description 6
- 238000005553 drilling Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000002360 explosive Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/0426—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with fluid-operated pilot valves, i.e. multiple stage valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a system of a drill jumbo for preventing a drill bit from being stuck in a karst cave. A propelling reversing valve is arranged between a hydraulic pump and a propelling oil cylinder and used for adjusting the working state of the propelling oil cylinder; a reducing valve module is arranged between the propelling reversing valve and the propelling oil cylinder and used for adjusting the propelling pressure applied to the propelling oil cylinder; an oil inlet of a propelling unloading valve is arranged between the reducing valve module and the propelling oil cylinder, and an oil outlet of the propelling unloading valve is connected with an oil tank; an impact reversing valve is arranged between a hydraulic pump and a rock drill and used for changing the working state of an impact hammer of the rock drill; a throttling valve module is arranged between the impact reversing valve and the rock drill and used for adjusting the impact frequency of the impact hammer; an oil inlet of an impact unloading valve is arranged between the throttling valve module and the impact hammer, and an oil outlet of the impact unloading valve is connected with the oil tank; a first shuttle valve is used for enabling the propelling unloading valve and the impact unloading valve to be communicated with respective reducing loops so as to release the pressure when the drill bit of the rock drill enters the karst cave. By adopting the system, the drill bit can be prevented from being stuck in the karst cave.
Description
Technical field
The present invention relates to drill jumbo field, specifically, the present invention relates to a kind of anti-solution cavity card pricker system of drill jumbo.
Background technique
Indicate that common card pricker type includes three types in " Lanzhou University of Science & Technology's journal " in June, 2009 (the 35th volume the 3rd phase) in 33rd ~ 38 pages of articles published " the automatic anti-blocking pricker control program of hydraulic gate ": I class card pricker-solution cavity card pricker, II class card pricker-gradual card pricker; III class card pricker-crack card pricker.
About I class card pricker-solution cavity card pricker, according to the record of article, when rock drill bit digs into solution cavity suddenly, bore bit is stuck by the rubble in solution cavity and the card pricker caused, is called " solution cavity card pricker ".When bore bit enters solution cavity district, because rock drill loses suddenly propelling resistance and the rotary resistance moment of rock, cause propelling force and turn pricker moment and can suddenly reduce, advance speed suddenly to increase simultaneously.And when crushed stone generation card pricker in bore bit incision " solution cavity " district is instantaneous, propelling resistance and rotary resistance moment can suddenly increase again.
See Fig. 1, it illustrates the change procedure of solution cavity card pricker, o is true origin, and abscissa t is the time, and y coordinate p is system oil pressure.Wherein, t
0for the card pricker omen point time, t
1for the card pricker appearance point time, t
2pricker and propelling pressure point time is turned for maximum; p
tfor creeping into oil pressure, p
zfor revolution oil pressure, p
z0pricker pressure normal average value is turned, p for stablizing normal rock drilling
z1for the critical value of solution cavity card pricker rotation pressure, p
zmfor normally turning the maximum oil pressure of pricker.
Solution cavity card pricker be because the rubble in solution cavity bore bit is stuck caused by, and rubble is often stuck in the joint of bore bit and drill steel, and the external diameter because of bore bit is greater than the external diameter of drill steel, so once there is this type of card pricker, bore bit is just difficult to extract.Facts have proved, this type of card pricker is the card pricker fault that a kind of most difficulty is put.
For the problems referred to above, a kind of hydraulic system tool of such card pricker that can prevent is provided to be of great significance.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of anti-solution cavity card pricker system of drill jumbo, and it can prevent the generation of card pricker.
In order to solve the problems of the technologies described above, present invention employs following technological scheme: a kind of anti-solution cavity card pricker system of drill jumbo, wherein, the anti-solution cavity card pricker system of this drill jumbo comprises: oil hydraulic pump, rock drill, propelling selector valve, reduction valve module, propelling unloading valve, propelling cylinder, impact selector valve, throttle valve module, impact unloading valve and the first shuttle valve, wherein
Described propelling selector valve is arranged between described oil hydraulic pump and described propelling cylinder, for regulating the working state of described propelling cylinder, to change the position of the described rock drill be connected with its piston rod;
Described reduction valve module installation, between described propelling selector valve and described propelling cylinder, puts on the propelling pressure of described propelling cylinder in order to adjustment;
The filler opening of described propelling unloading valve is arranged between described reduction valve module and described propelling cylinder, oil outlet connected tank;
Described impact selector valve is arranged between described oil hydraulic pump and described rock drill, to change the working state of the percussive hammer of described rock drill;
Described throttle valve module installation between described impact selector valve and described rock drill, in order to adjust the frequency of impact of described percussive hammer;
The filler opening of described impact unloading valve is arranged between described throttle valve module and described percussive hammer, oil outlet connected tank;
A filler opening of described first shuttle valve receives the oil from described propelling selector valve and/or described impact selector valve, another filler opening is arranged between described reduction valve module and described propelling cylinder, its oil outlet is connected with the control port of described propelling unloading valve and the control port of described impact unloading valve respectively, in order to when the bore bit of described rock drill enters solution cavity, make described propelling unloading valve and described impact unloading valve connect respective depressurized circuit and carry out release.
Preferably, the anti-solution cavity card pricker system of this drill jumbo also comprises pressure switch and the second shuttle valve, on the rod chamber oil circuit that two filler openings of described second shuttle valve are connected to described propelling cylinder and rodless cavity oil circuit, oil outlet is connected with described pressure switch, in order to work as described propelling unloading valve and described impact unloading valve off-load alarm.
Preferably, described propelling selector valve and described impact selector valve are three six hand-operated direction valves led to.
Preferably, the throttle valve group that described throttle valve module is formed for two throttle valve parallel connections, and the flow of two described throttle valve is different, by described impact selector valve commutation with the frequency of impact adjusting described percussive hammer.
Preferably, the anti-solution cavity card pricker system of this drill jumbo also comprises relief valve, and described relief valve is connected with the oil outlet of described oil hydraulic pump.
Preferably, between described reduction valve module and described propelling cylinder, propelling pressure table is connected with.
Preferably, between described throttle valve module and described percussive hammer, surge pressure table is connected with.
Preferably, the anti-solution cavity card pricker system of this drill jumbo also comprises on-off control valve, and described on-off control valve is connected to the filler opening place of described propelling unloading valve and described impact unloading valve, in order to control the break-make of described propelling unloading valve and described impact unloading valve.
Further, described on-off control valve is the Solenoid ball valve of two-position four-way.
Preferably, described propelling unloading valve and described impact unloading valve are two position three way directional control valve.
Compared with prior art, beneficial effect of the present invention is: adopt the first shuttle valve to control propelling unloading valve and impact unloading valve, when rock drill be in standby condition, pre-punching and height raise rush state time, advance unloading valve and impact unloading valve and be subject to the pressure being greater than its spring preset pressure, so remain on the state of not off-load due to control port; And once bore bit enters to solution cavity, then propelling pressure is reduced to lower than spring preset pressure, advances unloading valve to carry out off-load with impact unloading valve, like this, stop when bore bit just enters solution cavity, effectively prevent the generation of card pricker phenomenon.
Accompanying drawing explanation
When Fig. 1 is solution cavity card pricker, revolution oil pressure and the graph of a relation advancing oil pressure;
Fig. 2 is the schematic diagram of the anti-solution cavity card pricker system of drill jumbo of the present invention, and it is in standby condition;
Fig. 3 is the schematic diagram of the anti-solution cavity card pricker system of drill jumbo of the present invention, and it is in pre-punching state;
Fig. 4 is the schematic diagram of the anti-solution cavity card pricker system of drill jumbo of the present invention, and it is in height and raises the state of punching;
Fig. 5 is the schematic diagram of the anti-solution cavity card pricker system of drill jumbo of the present invention, and it is in touch and gently rushes state;
Fig. 6 is the schematic diagram of the anti-solution cavity card pricker system of drill jumbo of the present invention, and wherein, rock drill is in fallback state;
Fig. 7 is the structural representation of reduction valve module.
Embodiment
Below, with specific embodiment, the present invention is described in further detail by reference to the accompanying drawings, but not as a limitation of the invention.
Mention as background technique part, the card pricker of existing drill jumbo is mainly divided into solution cavity card pricker, gradual card pricker and crack card pricker (in addition, can write see Zhou Zhihong, Ma Fei, Zhang Wenming, Mao Jiling, " Underground Chisel Rock Equipment ", metallurgical industry publishing house, ISBN7-5024-3582-4,113-115 page, the introduction about solution cavity card pricker).This hydraulic system of the present invention, mainly solves the problem of solution cavity card pricker.Further, this anti-sticking pricker system of the present invention can be applied to the BOOMER rock drilling series chassis of Atlas Copco, as B281, B282, XL3D, K111, K41 series.Certainly, this anti-sticking pricker system, also by those skilled in the art according to circumstances, and can be applicable to the drill jumbo of other company/models.
The rock drilling mechanism of rock drilling system is: propelling pressure acts on propelling cylinder, and propelling cylinder makes rock drill move; Surge pressure acts on the internal hammer striker of rock drill, percussive hammer is moved back and forth and knocks bit shank to produce shock wave, and drill steel transmits this shock wave to bore bit, and rock contact bore bit is broken.
See Fig. 2, the anti-solution cavity card pricker system of drill jumbo of the present invention includes oil hydraulic pump (not shown, to represent the oil outlet of oil hydraulic pump with the P in scheming), rock drill 15, advances selector valve 6, reduction valve module 14, advances unloading valve 3, propelling cylinder 8, impacts selector valve 9, throttle valve module, impact unloading valve 4 and the first shuttle valve 5.T in this figure, represents oil sump tank.
The oil outlet P of oil hydraulic pump is communicated with the first branch road A1 and the second branch road A2, and wherein the first branch road A1 is communicated with advancing a filler opening of selector valve 6, and the second branch road A2 is communicated with the filler opening impacting selector valve 9.For avoiding this hydraulic system pressure excessive, be also communicated with relief valve 13 at the oil outlet place of oil hydraulic pump, particularly, this relief valve 13 is communicated in the first branch road A1.
Advancing selector valve 6, be three six-way transfer valves, be arranged between oil hydraulic pump and propelling cylinder 8, for regulating the working state of propelling cylinder 8, thus changing the position of the rock drill 15 be connected with the piston rod of propelling cylinder 8.As shown in FIG., selector valve 6 is advanced to be connected with the first branch road A1 by a filler opening.Selector valve 6 is advanced to have three hydraulic fluid ports away from oil hydraulic pump oil outlet P side, first hydraulic fluid port (being arranged in figure downside) is communicated with by the rodless cavity of oil circuit with propelling cylinder 8, second hydraulic fluid port (being arranged in the middle of figure) is connected with the hydraulic fluid port impacting selector valve 9 by oil circuit, and the 3rd hydraulic fluid port (being arranged in figure upside) is communicated with by the rod chamber of oil circuit with propelling cylinder 8.Advance selector valve 6 can realize different functions by the switching of three working positions, in fig. 2 shown in meta time, this propelling cylinder 8 can be made to be in preparatory work state; To its adjustment make it be in figure the next time, propelling cylinder 8 can be made to be in advanced state; To its adjustment make it be in figure upper time, propelling cylinder 8 can be made to be in the state of returning.The piston rod of propelling cylinder 8 is connected with rock drill 15, for driving rock drill 15 to travel forward, changes its position.
This propelling selector valve 6 can make all more options, such as, be electrically-controlled valve etc., in the present invention, advances selector valve 6 to be hand-operated direction valve, carries out manually-operable Solid rocket engine handle commutate by operator.
For ease of knowing the size of propelling pressure, be communicated with propelling cylinder 8 rodless cavity oil circuit on be communicated with propelling pressure table 16, this propelling pressure table 16 between reduction valve module 14 and propelling cylinder 8, to observe propelling pressure.
Reduction valve module 14 is arranged on and advances between selector valve 6 and propelling cylinder 8, puts on the propelling pressure of propelling cylinder 8 in order to adjustment, and particularly, in the present invention, reduction valve module 14 can by the aperture corrective action of valve in the propelling pressure of propelling cylinder.As shown in FIG., reduction valve module 14 is series on oil circuit, to adjust the oil outlet pressure of oil hydraulic pump, this reduction valve module 14 can make all more options, arrange independent reduction valve or by reduction valve and other valves with the use of, can propelling pressure be adjusted.A kind of situation has been shown in Fig. 7, and wherein, this reduction valve module 14 is chosen as adjustable one way pressure-reducing valve, and it is series in the propelling oil circuit of propelling cylinder 8 by P mouth and R mouth, thus adjusts propelling pressure.
Advance unloading valve 3, its filler opening is arranged on the position between reduction valve module 14 and propelling cylinder 8, and its oil outlet is communicated with fuel tank.In the present invention, this propelling unloading valve 3 is two position three way directional control valve, and a working position, it can off-load, and in another working position, it can not off-load.Further, in the present invention, this propelling unloading valve 3 is controlled by the first shuttle valve 5, when rock drill 15 be in preparation, pre-punching (touching) and high push mode time, this propelling unloading valve 3 all not off-load.As shown in FIG., this propelling unloading valve 3 is hydraulic control pilot valve.
Impact selector valve 9, be arranged between oil hydraulic pump and rock drill 15, to change the working state of the percussive hammer (rock drill internal hammer striker, not shown) of rock drill 15.As shown in FIG., this impact selector valve 9 is also three six-way transfer valves, and it is connected with the second branch road A2 of oil hydraulic pump by a filler opening.Impact selector valve 9, away from advancing the side of selector valve 6, there are three hydraulic fluid ports, first hydraulic fluid port (being arranged in figure downside) is connected with rock drill 15 by impacting oil circuit, second hydraulic fluid port (being arranged in the middle of figure) is connected with a filler opening of the first shuttle valve 5 by oil circuit, 3rd hydraulic fluid port (being arranged in figure upside) is connected with rock drill 15 by impacting oil circuit, connects when the first hydraulic fluid port is different from the 3rd hydraulic fluid port.Percussive hammer can be made to be in the state of impact or to be in the state of not impacting by this impact selector valve 9.
For ease of knowing the size of surge pressure, impact oil circuit is communicated with surge pressure table 17, and further, this surge pressure table 17 position between throttle valve module and percussive hammer, to observe surge pressure.
Similarly, this impact selector valve 9 can make all more options, such as, be electrically-controlled valve etc., and in the present invention, impacting selector valve 9 is hand-operated direction valve, carries out manually-operable impulsive control handle commutate by operator.
Throttle valve module, is arranged at and impacts between selector valve 9 and rock drill 15, in order to adjust the frequency of impact of the percussive hammer of rock drill 15.This throttle valve block coupled in series in impact oil circuit on, to control the frequency of impact of the percussive hammer of rock drill 15.This throttle valve module can make all more options, and such as, the combination of the combination of throttle valve or the valve of other types, as long as it can make when impacting selector valve 9 and commutating, percussive hammer can obtain different frequency of impacts.In the present invention, this throttle valve module is the throttle valve group 7 that two throttle valve are arranged in parallel formation, and the flow of these two throttle valve is different, when impacting selector valve 9 and commutating, makes percussive hammer obtain different frequency of impacts according to throttle flow rate difference.
Particularly, one of them throttle valve 701 is communicated with the first hydraulic fluid port impacting selector valve 9, the percussive hammer of rock drill 15 can be made to impact bit shank with high frequency, and another throttle valve 702 is communicated with the 3rd hydraulic fluid port impacting selector valve 9, and the percussive hammer of rock drill 15 can be made to impact bit shank with low frequency.When impact selector valve 9 carries out position switching, percussive hammer can be made to obtain the oil of different flow, thus obtain different frequency of impacts.These two throttle valve, all can adjust flux, impacts and high frequency impact to adjust low frequency respectively.
Impact selector valve 9 can realize different functions by the switching of three working positions, in fig. 2 shown in upper time, the percussive hammer of rock drill 15 can be made to be in standby condition.Coordinate this throttle valve module to use, when impact selector valve 9 is adjusted to the meta in figure, the percussive hammer of rock drill 15 can be made to be in low frequency impact conditions; When to be adjusted in figure the next, the percussive hammer of rock drill 15 can be made to be in high frequency impact conditions.
Impact unloading valve 4, its filler opening is arranged between throttle valve module (such as, the throttle valve group 7 in the present invention) and the percussive hammer of rock drill 15, oil outlet connected tank.Similarly, this impact unloading valve 4 is two position three way directional control valve, and a working position, it can off-load, and in another working position, it can not off-load.As shown in FIG., this impact unloading valve 4 is hydraulic control pilot valve.
First shuttle valve 5, an one filler opening receives self-propelled selector valve 6 and/or impacts the oil of selector valve 9, another filler opening is arranged between reduction valve module 14 and propelling cylinder 8, its oil outlet is connected with the control port advancing unloading valve 3 and the control port of impacting unloading valve 4 respectively, in order to when the bore bit of rock drill 15 enters solution cavity, make propelling unloading valve 3 and impact unloading valve 4 connect respective depressurized circuit and carry out release.Shown in figure be, a filler opening of the first shuttle valve 5 receives self-propelled selector valve 6 and impacts the oil of selector valve 9, and, advance selector valve 6 when three working positions, this filler opening of first shuttle valve 5 is keep connecting all the time, so, it is easily understood that this filler opening of the first shuttle valve 5 is only subject to the control impacting selector valve 9.Further, in conjunction with this figure, after rock drill starts, only when impacting selector valve 9 and being in the position making percussive hammer high frequency impact, this filler opening is without pressure oil.
But this filler opening of the first shuttle valve 5 only can also be subject to the control advancing selector valve 6 or be subject to advancing selector valve 6 and impacting selector valve 9 simultaneously.Similarly, it also should meet such condition: when action advances selector valve 6 makes rock drill in preparatory work state or pre-punching state with impact selector valve 9, this filler opening exports the pressure oil from the 220bar of oil hydraulic pump, and the delivery pressure as the first shuttle valve 5 participates in advancing unloading valve 3 and the control impacting unloading valve 4; And when action advances selector valve 6 makes rock drill 15 normally advance with rock drilling (height raises punching) with impact selector valve 9, it does not participate in controlling advance unloading valve 3 and impact unloading valve 4 as delivery pressure, now, unloading valve 3 is advanced and impacts unloading valve 4 whether the filler opening of the first shuttle valve 5 between reduction valve module 14 and propelling cylinder 8 is depended in off-load.
As previously mentioned, advance unloading valve 3 to be hydraulic control pilot valve with impact unloading valve 4, it all has control port, and each control port is all connected with the oil outlet of the first shuttle valve 5.When the oil outlet pressure of the first shuttle valve 5 is greater than the spring preset pressure advancing unloading valve 3 with impact unloading valve 4, then advances unloading valve 3 and impact unloading valve 4 switch operating position, being in the state of not off-load.Specifically in the present invention, start at rock drill 15 bore bit started to rock drill 15 and enter in the time between solution cavity, advance unloading valve 3 to be all in the state of not off-load with impact unloading valve 4.In addition, advance unloading valve 3 and the spring preset pressure of impacting unloading valve 4 should be greater than bore bit when entering solution cavity, the propelling pressure of propelling cylinder 8 is (after bore bit enters solution cavity, propelling pressure declines, namely, the pressure of a filler opening of the first shuttle valve 5), ensure in this case, the two all connects release.
In addition, the second branch road A2 is also provided with the first one-way valve 11 and the second one-way valve 12, first one-way valve 11 and is communicated between the second branch road A2 and the filler opening advancing selector valve 6, the second one-way valve 12 serial communication is on the second branch road A2.Like this, fluid can be ensured by oil hydraulic pump to advancing selector valve 6 and impacting the unidirectional output of selector valve 9.
For being convenient to control advance unloading valve 3 and impact unloading valve 4 further, advancing unloading valve 3, the filler opening place impacting unloading valve 4 is provided with on-off control valve, in order to control to advance unloading valve 3 and the break-make of impacting unloading valve 4, when this on-off control valve is connected, unloading valve 3 is advanced to have the possibility of connection with impact unloading valve 4 side.As shown in FIG., this on-off control valve can be chosen as Solenoid ball valve 1, it is two-position four-way valve, two filler openings of this two-position four-way valve are communicated in the rodless cavity oil circuit and impact oil circuit that push away oil cylinder 8 respectively, and two oil outlet is communicated in respectively and advances unloading valve 3 and the filler opening impacting unloading valve 4.When the spool of this Solenoid ball valve 1 is in the first working position (bottom in figure), advance unloading valve 3 all can not connect with impact unloading valve 4; When the spool of this Solenoid ball valve 1 is in the second working position (upper in figure), advance unloading valve 3 may connect with impact unloading valve 4.
Know that the bore bit of rock drill 15 enters solution cavity for ease of operator, the anti-solution cavity card pricker system of this drill jumbo of the present invention also comprises pressure switch 2 and the second shuttle valve 10, a filler opening of the second shuttle valve 10 is connected to the rod chamber oil circuit of propelling cylinder 8, another filler opening is connected to the rodless cavity oil circuit of propelling cylinder 8, the oil outlet Bonding pressure switch 2 of the second shuttle valve 10, advances unloading valve 3 in order to work as and impacts unloading valve 4 off-load alarm.This pressure switch 2 must depressed, and its electrical contact is normal off state, and under the cooperation of electrical system, the alarm indicator lamp of prevention solution cavity card pricker is in OFF state.
In addition, the RPCI function module 18 in figure and FPCI function module 19 are communicated in the two ends of reduction valve module 14 respectively.RPCI (rotation pressure control impact) function description: rotation pressure raises gradually, the stepless decline of propelling pressure; Rotation pressure exceedes anti-sticking pricker pressure, rock drill rollback.FPCI (feed pressure control impact) function description: raise punching (namely to high thrust during rock drill applying work at height, apply high frequency to percussive hammer to bit shank to impact) when there is card pricker under state, propelling pressure is stepless to be dropped to when being less than 50bar, and HI high impact changes to low impact; After card pricker is eliminated, when propelling pressure is raised to and is greater than 50bar, low impact turns back to HI high impact.This part does not belong to main improvement of the present invention, therefore no longer launches to describe.
Next, be described in conjunction with the concrete operation of each accompanying drawing to this anti-sticking pricker system of the present invention.
1) system enters standby condition.
Before drill jumbo starts, the spool impacting selector valve 9 is in figure upper, advances the spool of selector valve 6 to be in meta in figure.
As shown in Figure 2, after drill jumbo starts, hydraulic pump outlet P pressure oil is 220bar.This pressure oil is upper through the spool of overbump selector valve 9, enters the first shuttle valve 5.Thus, the outlet pressure of the first shuttle valve 5 is 220bar, and this 220bar pressure is pilot pressure, makes its spool all be in bottom after the spool promoting to advance unloading valve 3 and impact unloading valve 4 switches.Its effect is, the relief circuit of surge pressure is cut off, and the relief circuit of propelling pressure is also cut off.
Press electrical switch, Solenoid ball valve 1 obtains electric, and propelling pressure is connected and advanced unloading valve 3, and surge pressure is connected and impacted unloading valve 4.But be all in preparation job state owing to advancing unloading valve 3 and impacting unloading valve 4, now the propelling pressure of rock drill 15 and surge pressure are 0bar.
Second shuttle valve 10 is logic component, compares propelling cylinder 8 liang of active chamber input hydraulic fluid port pressure, takes large values as delivery pressure removes pilot pressure switch 2.
Pressure switch 2 is normal off state depressing its electrical contact, and under the cooperation of electrical system, " prevention solution cavity card pricker " alarm indicator lamp is in " extinguishing " state.
So, control system " ready " can normally work.
2) the pre-drilling operation of rock drill.
Promote impulsive control handle, make the spool impacting selector valve 9 be in meta.As shown in Figure 3, pressure oil 220bar, by this spool meta, enters the first shuttle valve 5.This 220bar pressure oil connects by this spool meta the throttle valve 702 that throttle valve group 7 is arranged in figure right side simultaneously, makes the internal hammer striker of rock drill 15 impact bit shank operation with low frequency.
Promote Solid rocket engine handle, make to advance the spool of selector valve 6 to be in bottom.As shown in Figure 3, pressure oil flows through RPCI function module 18, reduction valve module 14 and FPCI function module 19, enters the rodless cavity of propelling cylinder 8.Wherein, reduction valve module 14 controls propelling pressure is 40bar.Propelling cylinder 8 carries out propelling operation with 40bar working pressure.Meanwhile, 40bar working pressure enters the first shuttle valve 5.
The oil outlet pressure of the first shuttle valve 5 is 220bar, continue to promote to advance unloading valve 3 and impact unloading valve 4 spool switch and make spool be in bottom, so the relief circuit of surge pressure and propelling pressure is also still in dissengaged positions.
Pressure switch 2 is normal off state depressing its electrical contact, and under the cooperation of electrical system, " prevention solution cavity card pricker " alarm indicator lamp is in " extinguishing " state.
So, control system completes rock drill 15 " punching in advance " work (also can be referred to as " touching light punching " operation).
3) rock drill " height raises punching " operation.
Promote impulsive control handle, make the spool impacting selector valve 9 be in bottom.As shown in Figure 4, pressure oil 220bar enter the first shuttle valve 5 path be cut off.This 220bar pressure oil connects by this spool bottom the throttle valve 701 that throttle valve group 7 is arranged in figure left side simultaneously, makes the internal hammer striker of rock drill 15 impact bit shank operation with high frequency.
Promote Solid rocket engine handle, make the spool impacting selector valve 9 be in bottom.As shown in Figure 4, pressure oil flows through RPCI function module 18, reduction valve module 14 and FPCI function module 19, enters the rodless cavity of propelling cylinder 8.Wherein, reduction valve module 14 controls propelling pressure is 65bar.Propelling cylinder 8 carries out propelling operation with 65bar working pressure.Meanwhile, 65bar working pressure enters the first shuttle valve 5.
The oil outlet pressure of the first shuttle valve 5 is 65bar, and the spool continuing to promote to advance unloading valve 3 and impact unloading valve 4 switches, and makes spool be in bottom, so the relief circuit of surge pressure and propelling pressure is also still in dissengaged positions.
Pressure switch 2 is normal off state depressing its electrical contact, and under the cooperation of electrical system, " prevention solution cavity card pricker " alarm indicator lamp is in " extinguishing " state.
So, control system completes rock drill 15 " height raises punching " work.
4) solution cavity card pricker state of alarm is prevented.
In operation 3) on basis, bore bit is pouring the moment of " solution cavity ", and the working pressure of propelling cylinder 8 reduces to about 40bar (should be test determination data) instantaneously.
The outlet pressure of the first shuttle valve 5 is 40bar, and this 40bar pressure acts on the spool advancing unloading valve 3 and impact unloading valve 4.But the spring preset pressure advancing unloading valve 3 and impact unloading valve 4 is 50bar, under spring force, unloading valve 3 is advanced to be in upper with the spool impacting unloading valve 4.Its effect is, the relief circuit of surge pressure is switched on, and the relief circuit of propelling pressure is also switched on.
Further effect is, propelling cylinder 8 stops advancing, and the internal hammer striker of rock drill 15 stops impacting bit shank operation simultaneously.Propelling pressure becomes 0bar, and surge pressure becomes 0bar.
Pressure switch 2 its electrical contact under decompression is normal open state, and under the cooperation of electrical system, " prevention solution cavity card pricker " alarm indicator lamp is in " shinny " state, alert, and the bore bit of rock drill 15 enters solution cavity.
So, control system makes rock drill 15 be in " prevention solution cavity card pricker " working state.
5) system reset is to " touching light punching " job state.
This operation and operation 2) similar, promote impulsive control handle, make the spool impacting selector valve 9 be in meta.As shown in Figure 5, oil hydraulic pump oil outlet pressure is 220bar.This pressure oil, by impacting the spool meta of selector valve 9, enters into the first shuttle valve 5.
Promote Solid rocket engine handle, make to advance the spool of selector valve 6 to be in bottom.As previously mentioned, after reduction valve module 14, propelling pressure becomes 40bar.
The oil outlet pressure of the first shuttle valve 5 is 220bar, and this 220bar pressure is pilot pressure, makes spool be in bottom after the spool promoting to advance unloading valve 3 and impact unloading valve 4 switches.Its effect is, the relief circuit of surge pressure is cut off, and the relief circuit of propelling pressure is also cut off.
Pressure switch 2 is normal off state depressing its electrical contact, and under the cooperation of electrical system, " prevention solution cavity card pricker " alarm indicator lamp is in " extinguishing " state.
So, control system makes rock drill 15 be in " touching light punching " working state.
6) deslagging operation is carried out in " touching light punching " working state.
In operation 5) state under, now propelling pressure is 40bar.Promote Solid rocket engine handle back and forth, advance the spool of selector valve 6 to switch between the next (as shown in Figure 5) and upper (as shown in Figure 6), propelling cylinder 8 makes the bore bit of rock drill 15 move back and forth with " solution cavity " switching phase place in rock stratum.Its effect is, rock drill bit is got rid of rock stratum in time and is cut with the rock at " solution cavity " switching phase place, eliminates the influence factor making drill steel deflection.
Pressure switch 2 is normal off state depressing its electrical contact, and under the cooperation of electrical system, " prevention solution cavity card pricker " alarm indicator lamp is in " extinguishing " state.
So, control system makes rock drill 15 carry out " deslagging " operation at switching phase place.
7) cross in " solution cavity district " in " touching light punching " working state.
In operation 5) state under, now propelling pressure is 40bar.Control propelling cylinder 8 to continue to advance, bore bit starts to enter " solution cavity " district's operation.Under " touching light punching ", bore bit is relatively easily crossed " solution cavity " Ka Qianqu.
Because " solution cavity " rock stratum, district or stone distribute loose, rock drill 15 fltting speed is relatively very fast.When rock drill 15 fltting speed is from fast to slow, result shows that now bore bit is crossed " solution cavity " district.
Pressure switch 2 is normal off state depressing its electrical contact, and under the cooperation of electrical system, " prevention solution cavity card pricker " alarm indicator lamp is in " extinguishing " state.
So, control system makes rock drill 15 complete " solution cavity is interval " and passes through operation.
This system of the present invention, before generation card pricker, namely stops the propelling of rock drill and impacts operation, effectively can avoid the generation of solution cavity card pricker.In addition, the boring due to solution cavity district is difficult to embark on journey, and the explosive that explosive loading truck loads in solution cavity district is also difficult to be shaped.Utilize the present invention, during bore bit operation, also can stop creeping in initiative recognition solution cavity district, like this, explosive can be loaded in non-solution cavity district by controlled loading of explosive car, improve the utilization ratio of explosive.
Above embodiment is only exemplary embodiment of the present invention, and be not used in restriction the present invention, protection scope of the present invention is defined by the claims.Those skilled in the art can in essence of the present invention and protection domain, and make various amendment or equivalent replacement to the present invention, this amendment or equivalent replacement also should be considered as dropping in protection scope of the present invention.
Claims (10)
1. the anti-solution cavity card pricker system of a drill jumbo, it is characterized in that, comprise: oil hydraulic pump, rock drill, propelling selector valve, reduction valve module, propelling unloading valve, propelling cylinder, impact selector valve, throttle valve module, impact unloading valve and the first shuttle valve, wherein
Described propelling selector valve is arranged between described oil hydraulic pump and described propelling cylinder, for regulating the working state of described propelling cylinder, to change the position of the described rock drill be connected with its piston rod;
Described reduction valve module installation, between described propelling selector valve and described propelling cylinder, puts on the propelling pressure of described propelling cylinder in order to adjustment;
The filler opening of described propelling unloading valve is arranged between described reduction valve module and described propelling cylinder, oil outlet connected tank;
Described impact selector valve is arranged between described oil hydraulic pump and described rock drill, to change the working state of the percussive hammer of described rock drill;
Described throttle valve module installation between described impact selector valve and described rock drill, in order to adjust the frequency of impact of described percussive hammer;
The filler opening of described impact unloading valve is arranged between described throttle valve module and described percussive hammer, oil outlet connected tank;
A filler opening of described first shuttle valve receives the oil from described propelling selector valve and/or described impact selector valve, another filler opening is arranged between described reduction valve module and described propelling cylinder, its oil outlet is connected with the control port of described propelling unloading valve and the control port of described impact unloading valve respectively, in order to when the bore bit of described rock drill enters solution cavity, make described propelling unloading valve and described impact unloading valve connect respective depressurized circuit and carry out release.
2. the anti-solution cavity card pricker system of drill jumbo as claimed in claim 1, it is characterized in that, also comprise pressure switch and the second shuttle valve, on the rod chamber oil circuit that two filler openings of described second shuttle valve are connected to described propelling cylinder and rodless cavity oil circuit, oil outlet is connected with described pressure switch, in order to work as described propelling unloading valve and described impact unloading valve off-load alarm.
3. the anti-solution cavity card pricker system of drill jumbo as claimed in claim 1, is characterized in that, described propelling selector valve and described impact selector valve are three six logical hand-operated direction valves.
4. the anti-solution cavity card pricker system of drill jumbo as claimed in claim 1, it is characterized in that, the throttle valve group that described throttle valve module is formed for two throttle valve parallel connections, and the flow of two described throttle valve is different, by described impact selector valve commutation with the frequency of impact adjusting described percussive hammer.
5. the anti-solution cavity card pricker system of drill jumbo as claimed in claim 1, it is characterized in that, also comprise relief valve, described relief valve is connected with the oil outlet of described oil hydraulic pump.
6. the anti-solution cavity card pricker system of drill jumbo as claimed in claim 1, is characterized in that, between described reduction valve module and described propelling cylinder, be connected with propelling pressure table.
7. the anti-solution cavity card pricker system of drill jumbo as claimed in claim 1, is characterized in that, between described throttle valve module and described percussive hammer, be connected with surge pressure table.
8. the anti-solution cavity card pricker system of drill jumbo as claimed in claim 1, it is characterized in that, also comprise on-off control valve, described on-off control valve is connected to the filler opening place of described propelling unloading valve and described impact unloading valve, in order to control the break-make of described propelling unloading valve and described impact unloading valve.
9. the anti-solution cavity card pricker system of drill jumbo as claimed in claim 8, it is characterized in that, described on-off control valve is the Solenoid ball valve of two-position four-way.
10. the anti-solution cavity card pricker system of drill jumbo as claimed in claim 1, it is characterized in that, described propelling unloading valve and described impact unloading valve are two position three way directional control valve.
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| CN201510073402.9A CN104653529B (en) | 2015-02-11 | 2015-02-11 | The anti-solution cavity card pricker system of drill jumbo |
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| CN201510073402.9A CN104653529B (en) | 2015-02-11 | 2015-02-11 | The anti-solution cavity card pricker system of drill jumbo |
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| CN104653529B CN104653529B (en) | 2016-08-17 |
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| CN109854553A (en) * | 2019-04-03 | 2019-06-07 | 四川钻神智能机械制造有限公司 | A kind of anti-sticking pricker system in chance cavity of drill jumbo |
| CN112727818A (en) * | 2020-12-25 | 2021-04-30 | 中铁工程装备集团隧道设备制造有限公司 | Hydraulic control system of rock drill |
| CN113124006A (en) * | 2021-04-19 | 2021-07-16 | 中国铁建重工集团股份有限公司 | Hydraulic system for continuously adjusting rock drilling power |
| 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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| 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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|---|---|
| CN104653529B (en) | 2016-08-17 |
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Address after: 210038 Hengtai Road, Nanjing economic and Technological Development Zone, Nanjing, Jiangsu 2 Patentee after: An Bai Tuo (Nanjing) Construction Mine Equipment Co., Ltd. Address before: 210038 Hengtai Road, Nanjing economic and Technological Development Zone, Nanjing, Jiangsu 2 Patentee before: Atlas Copco (Nanjing) Construction & Mining Equipment Ltd. |
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