CN203717476U - Power-continuously-adjustable hydraulic control system for rock drill - Google Patents
Power-continuously-adjustable hydraulic control system for rock drill Download PDFInfo
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- CN203717476U CN203717476U CN201420089241.3U CN201420089241U CN203717476U CN 203717476 U CN203717476 U CN 203717476U CN 201420089241 U CN201420089241 U CN 201420089241U CN 203717476 U CN203717476 U CN 203717476U
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Abstract
The utility model provides a power-continuously-adjustable hydraulic control system for a rock drill. The power-continuously-adjustable hydraulic control system comprises an LS (laser system) controlled variable pump, a control valve block, a throttling hole and a pilot control shank, wherein the control valve block comprises a logic valve, an overflow valve, a balance valve, a hydraulic direction valve, a shuttle valve and a pressure reduction valve. Impact pressure of the rock drill can be configured to be between the lowest impact pressure and the highest impact pressure and is continuously controlled according to a moving angle of a pilot operating shank; control pressure of the operating shank is subjected to signal amplification through the balance valve, so that the LS control pressure of the variable pump and the control pressure of the logic valve are changed, and the impact pressure of the rock drill can be continuously changed between the lowest impact pressure and the highest impact pressure; therefore, the aim that the impact power of the rock drill is continuously adjusted is fulfilled. Under a special rock condition, the impact power of the rock drill can be flexibly adjusted, the energy is saved, the optimal rock drilling effect is achieved, and the production efficiency of the rock drill is increased.
Description
Technical field
The utility model relates to a kind of hydraulic control system, and particularly the hydraulic control system of rock drill, can realize adjustable continuously between light, the heavy percussion power of rock drill.
Background technique
Rock drill is in the rock construction equipment of engineering machinery, there is very important effect, main rock-boring machinery, rock drill divides by power source, there are pneumatic rock drill, diesel rock frill, electric rock drill and hydraulic gate etc., hydraulic gate is because its cutting rate is fast, power is large, efficiency is high, it is little to pollute, in occupation of the leading position of rock drill.Hydraulic gate is widely used in the even occasions such as driving, colliery and military engineering construction of city underground of the underground mining of black and nonferrous mine and tunnelling, railway and vcehicular tunnel.
General hydraulic gate all needs to be furnished with drill steel, bore bit and joint sleeve, utilizes bore bit fractured rock and holes, and when work, the bore bit of rock drill, except impacting rock, also needs rotation and advances, to realize high-speed drilling and reduce the wearing and tearing of bore bit.The rock dust that also needs in addition water to rinse to be broken or blow away ponding remaining in boring etc. with pressurized air.Except low power hand-held hydraulic rock drill, hydraulic gate is because power is large, speed is fast, the weight of itself is also large, is therefore conventionally configured in transportable vehicle (drill wagon for jack hammer) upper, to realize above-mentioned exercises, realizes the rapid drilling to rock.The power of rock drill, is to weigh with the maximum rated percussion power of the permission of rock drill, but when actual rock drilling work, need to carry out necessary power adjustments according to operating conditions, with minimum cost of production, reaches best using effect.
The drill wagon for jack hammer kind of production domesticization seldom, the drill wagon for jack hammer of domestic commonly foreign brand name, the adjusting of the rock drill percussion power of drill wagon for jack hammer, generally be divided into the fixing power of two-stage, according to the character of rock and situation about can cut a hole, the percussion power that wherein one-level is lower is used for holing and has just started when drill bit enters rock to use, and to reach the object of pilot bore hole accurate positioning, is called opening.Rock drill surge pressure during opening is called light surge pressure or cracking pressure.After completing the opening of boring, in order to improve cutting rate, adopt higher surge pressure to carry out rock drilling, be called heavy surge pressure or full power rock drilling pressure.The surge pressure of these two kinds of rock drills is to be undertaken when shutdown maintenance is safeguarded adjusting by maintenance technician according to the rocky condition of thumping majority, the general specified surge pressure close to rock drill or lower slightly.
In the drill wagon for jack hammer of foreign brand name, the Boomer series product of Atlas Copco company, the method of using exactly constant pressure variable displacement pump, manual directional control valve and throttle valve combination, offers rock drill, and the two kinds of surge pressures under operating mode of gently, heavily impacting that complete rock drill regulate.And the product of Tamrock company, the surge pressure of rock drill has adopted variable displacement pump LS(Load Sinser control, Loadsensing control) control technique is also to control rock drill work by gently, heavily impacting the adjusting of two kinds of surge pressures.This control system, advanced compared with the Boomer series product of Atlas Copco company, and energy consumption is lower.Also have some patented technologies both at home and abroad, use relief valve or by precursor overflow valve LS control system to rock drill gently, heavily impact and carry out the pressure controlled method of two-stage.
In practice of construction, because changing often appears in the character of rock, single weight two stage power is controlled the rock drilling parameter that might not be applicable to setting in technological scheme, the rock stratum that runs into rock matter compact structure needs high-power rock drilling, the rock stratum of rock matter springy texture, less power gets final product rock drilling, but on the various drill carriages of prior art, cannot meet the demand of the adjusting rock drill surge pressure that may occur at any time in complex formation, current present situation is to set a larger rated power just no longer to adjust later, because rock drill regulates the surge pressure of rock drill not substantially to be allowed in work progress temporarily, the power adjustment of rock drill must be adjusted by maintenance technician when shutting down, this situation that just makes rock drilling car always be in a high energy consumption or far super true power demand is worked.
Model utility content
The purpose of this utility model is to provide a kind of rock drill power continuously adjustable hydraulic control system, can realize to adjustable continuously between light, the heavy percussion power of rock drill, to meet the user demand of the adjusting rock drill surge pressure that may occur at any time in complex formation.
In order to achieve the above object, the utility model provides a kind of rock drill power continuously adjustable hydraulic control system, comprise variable displacement pump, control valve piece, throttle orifice and pilot control handle that LS controls, described control valve piece comprises logical valve, relief valve, equilibrium valve, the directional control valve that surges, shuttle valve and reduction valve;
The oil outlet of variable displacement pump is connected with the pressure hydraulic fluid port of the first logical valve in control valve piece, the oil outlet of the first logical valve and the pressure hydraulic fluid port of the second logical valve are connected, and the oil outlet of the second logical valve is connected with the impact oil sources hydraulic fluid port of rock drill;
The oil outlet of variable displacement pump is also connected with the pressure hydraulic fluid port of the first reduction valve in control valve piece, the oil outlet of described the first reduction valve is as the pressure oil-source of pilot control handle, simultaneously the oil outlet of described the first reduction valve is by second section discharge orifice, be connected with the control port of the first equilibrium valve and the pressure hydraulic fluid port of the second equilibrium valve, and the oil outlet of the first equilibrium valve and the second equilibrium valve is all connected with return tube;
The control port of the first logical valve and first is surged a hydraulic fluid port of directional control valve, a filler opening of the pressure hydraulic fluid port of the second relief valve, the first shuttle valve is connected, and the control port of the first logical valve is also connected with the impact oil sources hydraulic fluid port of first segment discharge orifice, rock drill; The pressure hydraulic fluid port of the oil outlet of the second relief valve and the first equilibrium valve is connected;
A surge hydraulic fluid port of directional control valve of the control port of the second logical valve and second is connected; During normality, surge any hydraulic fluid port of directional control valve of described hydraulic fluid port and second is all closed, and when described second surges directional control valve commutation, the second another hydraulic fluid port and return tube that surges directional control valve is communicated with;
Another filler opening of the first shuttle valve is connected with the LS signal tube of rock drill propulsion control valve, the delivery outlet of described the first shuttle valve is connected with the LS control port of variable displacement pump and the pressure hydraulic fluid port of the first relief valve respectively, and the oil outlet of the first relief valve communicates with return tube;
Two filler openings of the second shuttle valve are connected with light, the heavy impulsive control hydraulic fluid port of rock drill pilot control handle respectively, and surge directional control valve, the second control port of surging directional control valve of the delivery outlet respectively with the first of described the second shuttle valve is connected; In addition, the control port of heavy impulsive control control port also with the second equilibrium valve of pilot control handle is connected.
Further, the oil outlet of variable displacement pump is connected with the filler opening of the second reduction valve, and surge hydraulic fluid port of directional control valve of the oil outlet of described the second reduction valve and the 3rd is communicated with; During normality, surge any hydraulic fluid port of directional control valve of described hydraulic fluid port and the 3rd is all closed, when the 3rd surges directional control valve commutation, by another hydraulic fluid port of this valve and the compensator or trimmer pressure oil sources of rock drill, be communicated with, the 3rd heavy impulsive control control port of surging the control port of directional control valve and pilot control handle is communicated with.
Further, the control port of the first logical valve and the second logical valve is communicated with, can transposition.
Further, the first reduction valve can substitute by other pilot control in hydraulic system, and this pilot control is connected to the corresponding position of second section discharge orifice.
Further, pilot control handle, available electro-hydraulic proportional valve or other pilot-actuated valve substitute.
Further, the control valve piece in described hydraulic control system is screw-in cartridge valve.
The beneficial effects of the utility model:
The utility model provides continuously adjustable hydraulic control system between light, the heavy percussion power of a kind of rock drill, to meet the user demand of the adjusting rock drill surge pressure that may occur at any time in complex formation.Make the surge pressure of rock drill can be between the minimum surge pressure of setting and high shock pressure, the angle moving according to pilot operated handle is carried out continuous control, by equilibrium valve, the pilot pressure of operating grip is carried out to signal amplification, changed the pilot pressure of variable displacement pump LS pilot pressure and logical valve, the surge pressure that makes rock drill variation continuously between the minimum surge pressure of setting and high shock pressure, thus reach the continuously adjustable object of rock drill percussion power.The utility model can regulate neatly the percussion power of rock drill under special rock condition, saves the energy, obtains best rock drilling effect, to improve the manufacturing efficiency of rock drill.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Wherein: 1.1, the first logical valve, 1.2, the second logical valve, 2.1, the first relief valve, the 2.2, second relief valve, the 3.1, first equilibrium valve, 3.2, the second equilibrium valve, 4.1, first directional control valve that surges, 4.2, second directional control valve that surges, the 4.3, the 3rd directional control valve that surges, 5.1, the first shuttle valve, 5.2, the second shuttle valve, the 6.1, first reduction valve, the 6.2, second reduction valve, 7.1, first segment discharge orifice, 7.2, second section discharge orifice, 8, the variable displacement pump controlled of LS, 9, hydraulic gate, 10, pilot control handle, 11, accumulator;
The oil outlet of P1, variable displacement pump, P2, variable displacement pump supply the pressure oil-source of other hydraulic control circuits such as rock drill propelling simultaneously, t, control oily return opening, D1 hydraulic gate impacts oil sources, D2 hydraulic gate buffering oil sources (option), the control oil of LS, variable displacement pump, the LS pilot pressure hydraulic fluid port that other oil hydraulic circuits such as LS1, rock drill propelling provide, the pressure hydraulic fluid port of Pc, pilot control handle, the heavy impulsive control pressure hydraulic fluid port of C1, pilot control handle, the light impulsive control pressure hydraulic fluid port of C2 pilot control handle.
Embodiment
As shown in Figure 1, the continuously adjustable hydraulic control system of a kind of rock drill power, comprise variable displacement pump 8, control valve piece, throttle orifice and pilot control handle 10 that LS controls, described control valve piece comprises logical valve, relief valve, equilibrium valve, the directional control valve that surges, shuttle valve and reduction valve; The oil outlet of variable displacement pump 8 is connected with the pressure hydraulic fluid port of the first logical valve 1.1 in control valve piece, the oil outlet of the first logical valve 1.1 is connected with the pressure hydraulic fluid port of the second logical valve 1.2, and the oil outlet of the second logical valve 1.2 is connected with the impact oil sources D1 hydraulic fluid port of rock drill; The oil outlet of variable displacement pump 8 is also connected with the pressure hydraulic fluid port of the first reduction valve 6.1 in control valve piece, the oil outlet of described the first reduction valve 6.1 is as the pressure oil-source of pilot control handle 10, simultaneously the oil outlet of described the first reduction valve 6.1 is by second section discharge orifice 7.2, be connected with the control port of the first equilibrium valve 3.1 and the pressure hydraulic fluid port of the second equilibrium valve 3.2, and the oil outlet of the first equilibrium valve 3.1 and the second equilibrium valve 3.2 is all connected with return tube; The control port of the first logical valve 1.1 and first is surged a hydraulic fluid port of directional control valve 4.1, a filler opening of the pressure hydraulic fluid port of the second relief valve 2.2, the first shuttle valve 5.1 is connected, and the control port of the first logical valve 1.1 is also connected with the impact oil sources D1 hydraulic fluid port of first segment discharge orifice 7.1, rock drill; The pressure hydraulic fluid port of the oil outlet of the second relief valve 2.2 and the first equilibrium valve 3.1 is connected; A surge hydraulic fluid port of directional control valve 4.2 of the control port of the second logical valve 1.2 and second is connected; During normality, surge any hydraulic fluid port of directional control valve 4.2 of this hydraulic fluid port and second is all closed, and when described second surges directional control valve 4.2 commutation, the second another hydraulic fluid port and return tube that surges directional control valve 4.2 is communicated with; Another filler opening of the first shuttle valve 5.1 is connected with the LS signal tube of rock drill propulsion control valve, the delivery outlet of the first shuttle valve 5.1 is connected with the LS control port of variable displacement pump and the pressure hydraulic fluid port of the first relief valve 2.1 respectively, and the oil outlet of the first relief valve 2.1 communicates with return tube; Two filler openings of the second shuttle valve 5.2 are connected with light, heavy impulsive control hydraulic fluid port C1, the C2 of rock drill pilot control handle respectively, and surge directional control valve 4.1, the second control port of surging directional control valve 4.2 of the delivery outlet respectively with the first of the second shuttle valve 5.2 is connected; In addition, the control port of heavy impulsive control control port C1 also with the second equilibrium valve 3.2 of pilot control handle is connected.
For further provide can be continuous power variation, the oil outlet of variable displacement pump 8 is connected with the filler opening of the second reduction valve 6.2, surge a hydraulic fluid port connection of directional control valve 4.3 of the oil outlet of the second reduction valve 6.2 and the 3rd; During normality, surge any hydraulic fluid port of directional control valve 4.3 of this hydraulic fluid port and the 3rd is all closed, when the 3rd surges directional control valve 4.3 commutation, by another hydraulic fluid port of this valve and the compensator or trimmer pressure oil sources D2 of rock drill, be communicated with, the 3rd heavy impulsive control control port C1 that surges the control port of directional control valve 4.3 and pilot control handle 10 is communicated with.
In order further to increase the stability of native system, the control port of the first logical valve 1.1 and the second logical valve 1.2 is communicated with, can transposition; The first reduction valve 6.1 can substitute by other pilot control in hydraulic system, and this pilot control is connected to the corresponding position of second section discharge orifice 7.2; Pilot control handle 10, available electro-hydraulic proportional valve or other pilot-actuated valve substitute.
Further, the control valve piece in described hydraulic control system is screw-in cartridge valve, compact structure, be convenient to maintenance, exterior tubing is few, failure rate is low.
How below in conjunction with the embodiment in native system practical operation, further illustrate the utility model realizes:
Hydraulic control system of the present utility model, other the most basic elements should comprise the variable displacement pump 8 that LS controls, and this is the power source of this hydraulic system, and hydraulic gate 9 is executive components of hydraulic system, is control object of the present utility model.The percussion power of hydraulic gate 9 and the surge pressure of hydraulic oil become the fixing relevant relationship change of forward, therefore controlled the pressure that rock drill impacts oil sources, also just controlled the percussion power of rock drill.Rock drill impulsive control pilot control handle 10 is the mandatory control units in the utility model, and the angle by pilot control handle changes, and the control oil of output different pressures, by C1 or C2 hydraulic fluid port, carries out operation and controlling to the valve member in control valve piece.The heavy impulsive control pressure of C1 hydraulic fluid port, C2 is light impulsive control pressure hydraulic fluid port.Accumulator 11, in order to stablize the pressure of control unit, reduces pressure surge, to obtain best control effect.
Variable displacement pump is through the oil outlet P1 of variable displacement pump Access Control valve piece, and the logical valve of connection is that variable displacement pump is to the main control valve group of hydraulic gate fuel feeding break-make and adjusting pressure height.The effect of the first logical valve 1.1 of open type is: by the variation of its pilot pressure, reach the charge oil pressure of controlling rock drill; Normal close type the second logical valve 1.2, close under normal conditions, but under the control of guide's Joystick 10, by the second shuttle valve 5.2, control moving selector valve 4.2 commutations of the second hydraulic pressure, the control port of the second logical valve 1.2 and the oily return opening t of control are communicated with, the second logical valve 1.2 is just open-minded, and the hydraulic gate that the high pressure oil of variable displacement pump 8 is switched to hydraulic gate 9 impacts oil sources D1 hydraulic fluid port, and rock drill just carries out impact drilling.
The outlet pressure of the first logical valve 1.1, has determined the surge pressure of rock drill, and it is that pressure by control port decides.The pilot pressure of the first logical valve 1.1, changes according to the controlling method difference of pilot control handle 10 or pilot pressure, can produce different results.
When guide's Joystick 10 is placed in light impact position, control the pressure of the light impulsive control pressure hydraulic fluid port C2 of pilot control handle, by the second shuttle valve 5.2, make first directional control valve 4.1 and second directional control valve 4.2 commutations of surging of surging simultaneously.4.2 commutation, receives hydraulic gate by the oil sources of variable displacement pump 8 and impacts on oil sources D1 hydraulic fluid port.The first commutation of surging directional control valve 4.1, has cut off the first logical valve 1.1 control ports and has controlled being connected of oily return opening t.By first segment discharge orifice 7.1, from hydraulic gate, impact the pressure signal that oil sources D1 hydraulic fluid port is fetched, by the LS hydraulic fluid port on the first shuttle valve 5.1 and control valve piece, be loaded on variable displacement pump 8, variable displacement pump is boosted, because of the first logical valve 1.1, control the pressure rising of mouth simultaneously, make the outlet pressure of the first logical valve 1.1 continue to improve, realized the LS controlled loading of variable displacement pump 8 and the impacting start of hydraulic gate 9.
The rising of LS pilot pressure, finally can be subject to placing restrictions on of the first relief valve 2.1, and the pressure that the first relief valve 2.1 is set has determined the high output pressure of variable displacement pump 8, is also the Maximum operating pressure of this hydraulic control system.
By the light impulsive control pressure hydraulic fluid port C2 delivery pressure of pilot control handle, can not be loaded into the control port of the second equilibrium valve 3.2, now the pilot pressure of the second equilibrium valve 3.2 control ports is zero, between the pressure hydraulic fluid port of the second equilibrium valve 3.2 and oil outlet in closed condition.The pressure hydraulic fluid port Pc of variable displacement pump 8 oil outlets pilot control handle after the first reduction valve 6.1 decompression, has been loaded into the control mouth of the first equilibrium valve 3.1 by second section discharge orifice 7.2.Now the first equilibrium valve 3.1 is set in pressure hydraulic fluid port and oil outlet is opened completely, is communicated with also oil sump tank, without Pressure Drop with the control oil return opening t of control valve piece.Under this state, the rising of the control of variable displacement pump oil LS pressure except by the definite system maximum pressure of the first relief valve 2.1, has also been subject to the control of the second relief valve 2.2 simultaneously.The setting pressure of the second relief valve 2.2 is the light surge pressure of rock drill, is less than the highest system pressure of being determined by the first relief valve 2.1.Therefore the delivery pressure by the pressure controlled variable displacement pump 8 of control oil LS of variable displacement pump is controlled in the light surge pressure value of rock drill that the second relief valve 2.2 is set, and has realized the light percussion power of rock drill and has controlled.
When guide's Joystick is placed in the heavy impulsive control pressure hydraulic fluid port C1 position of pilot control handle, control port pressure makes first directional control valve 4.1 and second directional control valve 4.2 commutation of surging of surging by the second shuttle valve 5.2 simultaneously, control is below the same during with light impact, makes the hydraulic gate of hydraulic gate impact oil sources D1 and obtains surge pressure oil.Different with light impact hydraulic fluid port control, C1 has also directly been loaded into the control port of the second equilibrium valve 3.2.
Due to the principle that equilibrium valve is controlled, when equilibrium valve control port does not have Loading Control pressure, the maximum pressure differential of its pressure hydraulic fluid port and oil outlet is the pressure (being equivalent to relief valve) of this valve setting.When control port loads a pilot pressure, the pressure that now maximum pressure differential of equilibrium valve pressure hydraulic fluid port and oil outlet is set for this valve deducts the product of pilot pressure and this valve control ratio.When pilot pressure is enough large, pressure hydraulic fluid port is communicated with completely with oil outlet, without Pressure Drop.
When the pressure of the heavy impulsive control pressure hydraulic fluid port C1 of guide's Joystick reaches the maximum delivery pressure of pilot control handle, pressure hydraulic fluid port and the oil outlet of the second equilibrium valve 3.2 are communicated with completely, the control port of the first equilibrium valve 3.1 that like this with the second equilibrium valve 3.2 pressure hydraulic fluid ports are connected has not just had pilot pressure, the pressure difference between equilibrium valve 3.1 pressure hydraulic fluid ports and oil outlet now, has reached the setting pressure of equilibrium valve.This setting pressure is adjusted into the difference of the heavy surge pressure of rock drill of the present utility model and light surge pressure, and the setting pressure of the second relief valve 2.2 adds that the setting pressure of the first equilibrium valve 3.1 is the heavy surge pressure of native system rock drill.Therefore,, when the C1 of guide's Joystick 10 hydraulic fluid port delivery pressure reaches maximum value, the surge pressure of rock drill 02 has reached heavy surge pressure.The heavy surge pressure value of rock drill, is generally less than, is to the maximum the maximum pressure that equals this hydraulic system of being set by relief valve 2.1.
When the heavy impulsive control pressure hydraulic fluid port C1 delivery pressure of guide's Joystick changes between maximum value and minimum value, owing to there is pressure between the pressure hydraulic fluid port of the second equilibrium valve 3.2 and oil outlet, change, the pilot pressure of such the first equilibrium valve 3.1 is changed equally.Between the pressure hydraulic fluid port of the second equilibrium valve 3.2 and oil outlet, pressure variation becomes the relation of inverse correlation linear change with the heavy impulsive control pressure hydraulic fluid port C1 delivery pressure of pilot control handle, and this pressure variation of the first equilibrium valve 3.1 becomes the relation of positive correlation linear change with the heavy impulsive control pressure hydraulic fluid port C1 delivery pressure of pilot control handle.Therefore, the percussion power that the heavy impulsive control pressure hydraulic fluid port C1 delivery pressure of pilot control handle can be controlled rock drill from gently impacting of minimum maximum heavily between impact, become successional variation, realized control target of the present utility model.
At present, the rock drill of high-power generally all needs to have a buffering oil sources.For this reason, in control valve piece of the present utility model, be provided with the second reduction valve 6.2, the pressure hydraulic fluid port of this valve communicates with the oil outlet P1 of variable displacement pump, and oil outlet is communicated with the 3rd hydraulic fluid port that surges directional control valve 4.3.During normality, this hydraulic fluid port and other hydraulic fluid ports are obstructed, and the pressure oil of variable displacement pump can not output to rock drill buffering oil sources D2.When the heavy impulsive control pressure hydraulic fluid port C1 pressure output control of guide's Joystick, the 3rd directional control valve 4.3 commutation of surging, the hydraulic fluid port of the moving directional control valve 4.3 of the 3rd hydraulic pressure and the buffering of the hydraulic gate on control valve piece oil sources D2 hydraulic fluid port are communicated with, the pressure oil being provided by variable displacement pump has been loaded on hydraulic gate buffering oil sources D2 hydraulic fluid port, to rock drill, provides buffering oil sources.The pressure height of this buffering oil sources, is regulated by the second reduction valve 6.2.
The utility model Fig. 1 has only represented to impact relevant part to rock drill.Full hydraulic drifter drill, except rock drill impulsive control part, must also will have the parts such as propelling of rock drill.For this reason, variable displacement pump on control valve piece supplies other hydraulic systems that the pressure oil-source P2 hydraulic fluid port of other hydraulic control circuits such as rock drill propelling is drill carriage that oil sources is provided simultaneously, and the LS pilot pressure hydraulic fluid port LS1 being provided by other oil hydraulic circuits such as rock drill propellings accepts the LS control signal of other hydraulic systems to variable displacement pump.
The utility model provides continuously adjustable hydraulic control system between light, the heavy percussion power of a kind of rock drill, to meet the user demand of the adjusting rock drill surge pressure that may occur at any time in complex formation.Make the surge pressure of rock drill can be between the minimum surge pressure of setting and high shock pressure, the angle moving according to pilot operated handle is carried out continuous control, by equilibrium valve, the pilot pressure of operating grip is carried out to signal amplification, changed the pilot pressure of variable displacement pump LS pilot pressure and logical valve, the surge pressure that makes rock drill variation continuously between the minimum surge pressure of setting and high shock pressure, thus reach the continuously adjustable object of rock drill percussion power.The utility model can regulate neatly the percussion power of rock drill under special rock condition, saves the energy, obtains best rock drilling effect, to improve the manufacturing efficiency of rock drill.
Above-described is only preferred embodiment of the present utility model.Should be understood that for the person of ordinary skill of the art, under technology enlightenment provided by the utility model, as the common practise of related domain, can also make other equivalent modifications and improvement, also should be considered as protection domain of the present utility model.
Claims (6)
1. the continuously adjustable hydraulic control system of rock drill power, comprise variable displacement pump, control valve piece, throttle orifice and pilot control handle that LS controls, it is characterized in that: described control valve piece comprises logical valve, relief valve, equilibrium valve, the directional control valve that surges, shuttle valve and reduction valve;
The oil outlet of variable displacement pump is connected with the pressure hydraulic fluid port of the first logical valve in control valve piece, the oil outlet of the first logical valve and the pressure hydraulic fluid port of the second logical valve are connected, and the oil outlet of the second logical valve is connected with the impact oil sources hydraulic fluid port of rock drill;
The oil outlet of variable displacement pump is also connected with the pressure hydraulic fluid port of the first reduction valve in control valve piece, the oil outlet of described the first reduction valve is as the pressure oil-source of pilot control handle, simultaneously the oil outlet of described the first reduction valve is by second section discharge orifice, be connected with the control port of the first equilibrium valve and the pressure hydraulic fluid port of the second equilibrium valve, and the oil outlet of the first equilibrium valve and the second equilibrium valve is all connected with return tube;
The control port of the first logical valve and first is surged a hydraulic fluid port of directional control valve, a filler opening of the pressure hydraulic fluid port of the second relief valve, the first shuttle valve is connected, and the control port of the first logical valve is also connected with the impact oil sources hydraulic fluid port of first segment discharge orifice, rock drill; The pressure hydraulic fluid port of the oil outlet of the second relief valve and the first equilibrium valve is connected;
A surge hydraulic fluid port of directional control valve of the control port of the second logical valve and second is connected; During normality, surge any hydraulic fluid port of directional control valve of described hydraulic fluid port and second is all closed, and when described second surges directional control valve commutation, the second another hydraulic fluid port and return tube that surges directional control valve is communicated with;
Another filler opening of the first shuttle valve is connected with the LS signal tube of rock drill propulsion control valve, the delivery outlet of described the first shuttle valve is connected with the LS control port of variable displacement pump and the pressure hydraulic fluid port of the first relief valve respectively, and the oil outlet of the first relief valve communicates with return tube;
Two filler openings of the second shuttle valve are connected with light, the heavy impulsive control hydraulic fluid port of rock drill pilot control handle respectively, and surge directional control valve, the second control port of surging directional control valve of the delivery outlet respectively with the first of described the second shuttle valve is connected; In addition, the control port of heavy impulsive control control port also with the second equilibrium valve of pilot control handle is connected.
2. the continuously adjustable hydraulic control system of a kind of rock drill power according to claim 1, it is characterized in that: the oil outlet of described variable displacement pump is connected with the filler opening of the second reduction valve, surge hydraulic fluid port of directional control valve of the oil outlet of described the second reduction valve and the 3rd is communicated with; During normality, surge any hydraulic fluid port of directional control valve of described hydraulic fluid port and the 3rd is all closed, when the 3rd surges directional control valve commutation, by another hydraulic fluid port of this valve and the compensator or trimmer pressure oil sources of rock drill, be communicated with, the 3rd heavy impulsive control control port of surging the control port of directional control valve and pilot control handle is communicated with.
3. the continuously adjustable hydraulic control system of a kind of rock drill power according to claim 1, is characterized in that: the control port of the first logical valve and the second logical valve is communicated with, can transposition.
4. the continuously adjustable hydraulic control system of a kind of rock drill power according to claim 1, is characterized in that: the first reduction valve can substitute by other pilot control in hydraulic system, and this pilot control is connected to the corresponding position of second section discharge orifice.
5. the continuously adjustable hydraulic control system of a kind of rock drill power according to claim 1, is characterized in that: pilot control handle, available electro-hydraulic proportional valve or other pilot-actuated valve substitute.
6. the continuously adjustable hydraulic control system of a kind of rock drill power according to claim 1, is characterized in that: the control valve piece in described hydraulic control system is screw-in cartridge valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420089241.3U CN203717476U (en) | 2014-02-28 | 2014-02-28 | Power-continuously-adjustable hydraulic control system for rock drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420089241.3U CN203717476U (en) | 2014-02-28 | 2014-02-28 | Power-continuously-adjustable hydraulic control system for rock drill |
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| Publication Number | Publication Date |
|---|---|
| CN203717476U true CN203717476U (en) | 2014-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420089241.3U Withdrawn - After Issue CN203717476U (en) | 2014-02-28 | 2014-02-28 | Power-continuously-adjustable hydraulic control system for rock drill |
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| CN (1) | CN203717476U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821777A (en) * | 2014-02-28 | 2014-05-28 | 金川集团股份有限公司 | Hydraulic control system with continuously-adjustable power for rock drilling machine |
-
2014
- 2014-02-28 CN CN201420089241.3U patent/CN203717476U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821777A (en) * | 2014-02-28 | 2014-05-28 | 金川集团股份有限公司 | Hydraulic control system with continuously-adjustable power for rock drilling machine |
| CN103821777B (en) * | 2014-02-28 | 2016-04-13 | 金川集团股份有限公司 | The continuously adjustable hydraulic control system of rock drill power |
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