CN204003698U - Reverse feedback hydraulic system and rotary drilling rig - Google Patents
Reverse feedback hydraulic system and rotary drilling rig Download PDFInfo
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- CN204003698U CN204003698U CN201420409322.7U CN201420409322U CN204003698U CN 204003698 U CN204003698 U CN 204003698U CN 201420409322 U CN201420409322 U CN 201420409322U CN 204003698 U CN204003698 U CN 204003698U
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Abstract
The utility model discloses a kind of feedback hydraulic system and rotary drilling rig.Above-mentioned reverse feedback hydraulic system comprises: the first main pump, the second main pump, the first main valve, the second main valve, relief valve, actuator, pilot handle valve and pioneer pump; Also comprise: switch valve and pilot operated directional control valve; The oil drain out of pioneer pump is connected to the hydraulic control end of pilot operated directional control valve by switch valve; Pilot operated directional control valve is arranged on the oil circuit between pilot handle valve and the second main valve, and it comprises two kinds of working staties; Under the first working state, the first actuator port of pilot handle valve and the second actuator port communicate with the first hydraulic control end and the second hydraulic control end of the second main valve respectively by pilot operated directional control valve; Under the second working state, pilot operated directional control valve cuts off the oil circuit between pilot handle valve and the second main valve, and the first hydraulic control end of the second main valve and the oil pressure of the second hydraulic control end are equated.It is low that this reverse feedback hydraulic system has under unusual service condition system capacity loss, the advantage that functional reliability is higher.
Description
Technical field
The utility model relates to engineering machinery field, particularly a kind of reverse feedback hydraulic system and rotary drilling rig.
Background technique
Rotary drilling rig is a kind of construction plant for the operation of building foundation engineering pore-forming, and it is mainly suitable for the construction of the soil layers such as sand, cohesive soil, slity soil, extensive application in the multiple foundation basic constructions such as bored concrete pile, diaphragm wall, strengthening of foundation.
Rotary drilling rig is made up of chassis, equipment, electrical system and hydraulic system etc.Hydraulic system mainly completes the transmission of power and the realization of action, is the important component part of rotary drilling rig.At present, the hydraulic system of rotary drilling rig adopts reverse feedback hydraulic system conventionally.Meanwhile, oil hydraulic pump is as the main hydraulic power supply of hydraulic system, and in work progress, master winch, unit head, secondary elevator etc. are all driven by main pump, and in order to ensure to have enough power sources, existing reverse feedback hydraulic system adopts many pumps interflow to supply with.
Particularly, the reverse feedback hydraulic system of existing rotary drilling rig mainly comprises the first main pump, the second main pump, the first main valve, the second main valve, relief valve, actuator's (as hoist motor), pilot handle valve and pioneer pump etc.Wherein: the first main pump and the second main pump are variable displacement pump, the oil outlet of the first main pump and the second main pump is connected to respectively the filler opening of the first main valve and the second main valve, the actuator port of the first main valve and the second main valve is connected to respectively actuator, on the first main valve and the second main valve, be also provided with feedback hydraulic fluid port in the side near its actuator port, two feedback hydraulic fluid ports corresponding stroking mechanism that is connected to the first main pump and the second main pump respectively; Relief valve is arranged on the oil circuit between actuator port and the actuator of above-mentioned the first main valve and/or the second main valve; The filler opening of pilot handle valve is connected to the oil drain out of pioneer pump, return opening is connected to fuel tank, the first actuator port of pilot handle valve is connected to the first hydraulic control end of the first main valve and the first hydraulic control end of the second main valve, and the second actuator port is connected to the second hydraulic control end of the first main valve and the second hydraulic control end of the second main valve.In the course of the work, can make pressure oil effect to the first main valve of pioneer pump output and one of them hydraulic control end of the second main valve by controlling the position of pilot handle valve, and then the working state of control the first main valve and the second main valve, the pressure oil effect of feedback hydraulic fluid port output, to the stroking mechanism of main pump, can be adjusted main pump delivery.
That rotary drilling rig is carried on can running in work progress is motionless, creep into and suppress the unusual service condition of waiting indefinitely, and now actuator does not work, and the pressure oil of main pump after by main valve all falls by relief valve overflow.So not only cause a large amount of energy dissipations, also can make hydraulic oil oil temperature suddenly raise simultaneously, cause hydraulic seal premature aging, leakage of oil, hydraulic oil is apt to deteriorate, hydraulic system leakage amount strengthens, the problem such as Hydraulic System Reliability is low.
Model utility content
In view of this, the utility model proposes under a kind of unusual service condition system capacity loss low, reverse feedback hydraulic system and rotary drilling rig that functional reliability is higher.
For achieving the above object, the technical solution of the utility model is achieved in that
On the one hand, the utility model provides a kind of reverse feedback hydraulic system, comprising: the first main pump, the second main pump, the first main valve, the second main valve, relief valve, actuator, pilot handle valve and pioneer pump; Also comprise: switch valve and pilot operated directional control valve; The oil drain out of described pioneer pump is connected to the hydraulic control end of pilot operated directional control valve by described switch valve; Described pilot operated directional control valve is arranged on the oil circuit between described pilot handle valve and the second main valve, and it comprises two kinds of working staties; Under the first working state, the first actuator port of described pilot handle valve and the second actuator port communicate with the first hydraulic control end and the second hydraulic control end of described the second main valve respectively by described pilot operated directional control valve; Under the second working state, described pilot operated directional control valve cuts off the oil circuit between described pilot handle valve and the second main valve, and the first hydraulic control end of the second main valve and the oil pressure of the second hydraulic control end are equated.
Further, at described pilot operated directional control valve, under the second working state, the first hydraulic control end and the second hydraulic control end of described the second main valve communicate by described pilot operated directional control valve; Or the first hydraulic control end and the second hydraulic control end of the second main valve are all connected to fuel tank.
Further, described switch valve and pilot operated directional control valve are integrated in flow cut-off valve piece.
Further, described reverse feedback hydraulic system also comprises the first shuttle valve and the first reduction valve; The filler opening of described the first reduction valve communicates with the oil drain out of described pioneer pump, and oil outlet communicates with the first input end of described the first shuttle valve; The second input end of described the first shuttle valve communicates with the feedback hydraulic fluid port of described the first main valve, and the output terminal of described the first shuttle valve is connected to the stroking mechanism of described the first main pump.
Further, described reverse feedback hydraulic system also comprises the second shuttle valve and the second reduction valve; The filler opening of described the second reduction valve communicates with the oil drain out of described pioneer pump, and oil outlet communicates with the first input end of described the second shuttle valve; The second input end of described the second shuttle valve communicates with the feedback hydraulic fluid port of described the second main valve, and the output terminal of described the second shuttle valve is connected to the stroking mechanism of described the second main pump.
Further, described the first reduction valve and/or the second reduction valve are electric proportional pressure-reducing valve.
Further, described the first reduction valve, the first shuttle valve, the second reduction valve and the second shuttle valve are integrated in reverse feedback regulating valve block.
Further, described switch valve is solenoid valve.
Further, described reverse feedback hydraulic system also comprises discharge capacity regulation unit, and described discharge capacity regulation unit comprises: pressure transducer, for detection of the working pressure of described actuator; Controller, is connected with switch valve with described pressure transducer, while exceeding predetermined value, controls described switch valve in connected state for the working pressure value of obtaining when described pressure transducer.
On the other hand, the utility model also provides a kind of rotary drilling rig, works the reverse feedback hydraulic system being provided with described in above-mentioned any one.
Model utility provides in a kind of reverse feedback hydraulic system.With respect to prior art, the reverse feedback hydraulic system that the utility model provides is worked as actuator and is born compared with heavy load and in high pressure, high flow capacity, when slow-speed of revolution operating mode, switch valve is communicated with, the hydraulic oil of pioneer pump oil drain out acts on the hydraulic control end of pilot operated directional control valve by switch valve, make pilot operated directional control valve commutation, now pilot operated directional control valve is in the second working state, the hydraulic oil of two actuator ports of pilot handle valve cannot act on two hydraulic control ends of the second main valve, the hydraulic oil of two hydraulic control ends of the second main valve is realized oil pressure balance by pilot operated directional control valve simultaneously, the second main valve is in meta.Change thus the working state of main pump entirety, switch to part pump by original many pumps interflow supply and supply with.Therefore, the reverse feedback hydraulic system that the utility model provides can change by above-mentioned switch valve and pilot operated directional control valve the working state of main pump entirety, when actuator is subject to load excessive and under load high pressure, high flow capacity, slow-speed of revolution operating mode, creep into and suppress when dead as carried motionless or unit head on master winch, make main pump switch to part pump supply model by many pumps interflow supply model, main pump entirety supply flow reduces, and then reduces energy waste, improves the reliability of hydraulic system.
Brief description of the drawings
The accompanying drawing that forms a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
The principle schematic of the reverse feedback hydraulic system that Fig. 1 provides for the utility model embodiment;
The structured flowchart of discharge capacity regulation unit in the reverse feedback hydraulic system that Fig. 2 provides for the utility model embodiment.
Description of reference numerals:
1 switch valve
2 pilot operated directional control valve Pil hydraulic control ends
E1 first hydraulic fluid port e2 the second hydraulic fluid port
E3 the 3rd hydraulic fluid port e4 the 4th hydraulic fluid port
3 pioneer pumps
4 pilot handle valves
A1 first actuator port a2 the second actuator port
The feedback hydraulic fluid port of 51 first main valve Df the first main valves
The feedback hydraulic fluid port of 52 second main valve Ef the second main valves
B1 first hydraulic control end B2 the second hydraulic control end
61 first shuttle valves
C1 first input end C2 the second input end
C3 output terminal
62 second shuttle valves
71 first reduction valve
72 second reduction valve
81 first main pumps
82 second main pumps
9 pressure transducers
10 relief valves
11 controllers
12 actuators
13 flow cut-off valve pieces
14 reverse feedback regulating valve blocks
Embodiment
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the utility model can combine mutually.Below in conjunction with accompanying drawing, each preferred embodiment of the present utility model is described further:
Refer to Fig. 1, the figure shows the utility model embodiment provides the schematic diagram of reverse feedback hydraulic system.This reverse feedback hydraulic system specifically comprises: the first main pump 81, the second main pump 82, the first main valve 51, the second main valve 52, relief valve 10, actuator 12, pilot handle valve 4 and pioneer pump 3, the annexation of above-mentioned parts can be same as the prior art.
In addition, this reverse feedback hydraulic system also comprises:
Switch valve 1 and pilot operated directional control valve 2;
The oil drain out of pioneer pump 3 is connected to the hydraulic control end Pil of pilot operated directional control valve 2 by switch valve 1; Pilot operated directional control valve 2 is arranged on the oil circuit between pilot handle valve 4 and the second main valve 52, it comprises two kinds of working staties: under the first working state, the first actuator port a1 of pilot handle valve 4 and the second actuator port a2 communicate with the first hydraulic control end B1 and the second hydraulic control end B2 of the second main valve 52 respectively by above-mentioned pilot operated directional control valve 2; Under the second working state, pilot operated directional control valve 2 cuts off the oil circuit between pilot handle valve 4 and the second main valve 52, and the first hydraulic control end B1 of the second main valve 52 and the oil pressure of the second hydraulic control end B2 are equated.
The reverse feedback hydraulic system that the utility model embodiment provides can be by changing the working state of main pump entirety (comprising the first main pump 81 and the second main pump 82) in actuator under high pressure, high flow capacity, slow-speed of revolution operating mode to reduce the energy loss of whole hydraulic system.Particularly, when actuator is in this operating mode lower time, can be by adjusting the state of switch valve 1 with the state of change pilot operated directional control valve 2, make in the situation that ensureing that system pressure is constant, two pump interflow supply models are switched to single pump supply model, can make like this supply flow effectively reduce, thereby make through relief valve 10 and the energy consumption that produces effectively reduces, avoid the problems such as the too fast rising of hydraulic oil oil temperature.Above-mentioned effect realizes by above-mentioned switch valve 1 and pilot operated directional control valve 2.Above-mentioned switch valve 1 is connected between the oil drain out of pioneer pump 3 and the hydraulic control end Pil of pilot operated directional control valve 2, for switching the working state of pilot operated directional control valve 2; Pilot operated directional control valve 2 is arranged on pilot handle valve 4 and the second main valve 52, for under different working staties, the optionally oil circuit between connection or cut-out pilot handle valve 4 and the second main valve 52, and in the situation that cutting off oil circuit, make the first hydraulic control end B1 of the second main valve 52 and the oil pressure of the second hydraulic control end B2 equate, make thus the second main valve 52 in meta, and then reduce the discharge capacity of the second main pump 82 of being connected with this second main valve 52, now switch to single pump supply model by two pump interflow supply models, only have the first main pump 81 to supply with the pattern of hydraulic oil.
To be applied to rotary drilling rig as example, the detailed operation principle of the reverse feedback hydraulic system that above-mentioned the present embodiment provides is described below in conjunction with concrete scene:
Under nominal situation, rotary drilling rig normal operation, two main pumps can be by two main valves to actuator's 12 supply hydraulic fluids (i.e. two pump interflow supply models), actuator 12 is normally worked, under this operating mode, switch valve 1 is in dissengaged positions, pilot operated directional control valve 2 is in the first working state (left position in Fig. 1), the first actuator port a1 of pilot handle valve 4 and the second actuator port a2 communicate with two hydraulic control ends of the first main valve 51 on the one hand, also communicate with two hydraulic control ends (B1 and B2) of the second main valve 52 respectively by pilot operated directional control valve 2 on the other hand, operator can change by handling pilot handle valve 4 working state of the first main valve 51 and the second main valve 52, as working position, spool aperture, so that actuator 12 acts accordingly.Be now two pump interflow supply models.
In operation process, if actuator 12 bears compared with heavy load, for example when be difficult to creep into or on carry when stuck, will make hydraulic system in high pressure, high flow capacity, under slow-speed of revolution operating mode (unusual service condition), in this case, can make switch valve 1 in connected state, the pressure oil of pioneer pump 3 oil drain out outputs will act on the hydraulic control end Pil of pilot operated directional control valve 2 by switch valve 1, pilot operated directional control valve 2 is commutated and in the second working state (in Fig. 1 right position), two hydraulic control ends that are no longer communicated in the second main valve 52 of 4 two actuator ports of pilot handle valve like this, cut off the control of pilot handle valve 4 to the second main valve 52, and the hydraulic oil of 52 two hydraulic control ends of the second main valve is realized oil pressure balance (both oil pressure equate substantially) by pilot operated directional control valve 2, the second main valve 52 is in meta state, cut off the second main pump 82 to actuator's 12 fuel feeding, and the hydraulic oil that the second main pump 82 is exported can make the second main pump 82 in the lower state of energy consumption through the feedback hydraulic fluid port of the second main valve after the stroking mechanism feedback of the second main pump 82, in system, only have like this first main pump 81 to continue the fuel feeding to actuator.It is now single pump supply model.
Hence one can see that, the reverse feedback hydraulic system that adopts the present embodiment to provide can change the working state of main pump entirety,, in the time that hydraulic system is born load excessive (carry on as master winch motionless or unit head creep into suppress dead) in load high pressure, high flow capacity, slow-speed of revolution operating mode because of actuator, can make main pump entirety switch to part pump supply model by many pumps interflow supply model, the energy consumption that can make like this through relief valve 10 and produce effectively reduces, avoid the too fast rising of hydraulic oil oil temperature, improved the reliability of hydraulic system.
In specific implementation process, the reverse feedback hydraulic system of above-described embodiment can further adopt following one or more optimal ways.
One, for make the second main valve 52 can be when the unusual service condition under the effect of pilot operated directional control valve 2 in meta, can adopt the pilot operated directional control valve of suitable construction form, make at pilot operated directional control valve 2 during in the second working state, the first hydraulic control end B1 of the second main valve 52 and the second hydraulic control end B2 can communicate by this pilot operated directional control valve 2; Or the first hydraulic control end B1 of the second main valve 52 and the second hydraulic control end B2 are all connected to fuel tank.For example, pilot operated directional control valve 2 can be two-position four-way pilot operated directional control valve, its the first hydraulic fluid port e1 and the second hydraulic fluid port e2 communicate with the first actuator port a1 and the second actuator port a2 of pilot handle valve 4 respectively, and the 3rd actuator port e3 and the 4th actuator port e4 communicate with the first hydraulic control end B1 and the second hydraulic control end B2 of the second main valve 52 respectively; Under the first working state, the first hydraulic fluid port e1 communicates with the 3rd hydraulic fluid port e3, and the second hydraulic fluid port e2 communicates with the 4th hydraulic fluid port e4, and now pilot operated directional control valve 2 is communicated with the oil circuit between pilot handle valve 4 and the second main valve 52; Under the second working state, the first hydraulic fluid port e1 and the second hydraulic fluid port e2 all end, and the 3rd hydraulic fluid port e3 and the 4th hydraulic fluid port e4 communicate (as shown in Figure 1), or the 3rd hydraulic fluid port e3 and the 4th hydraulic fluid port e4 are all connected to fuel tank, now pilot operated directional control valve 2 also makes the pressure of 52 two hydraulic control ends of the second main valve substantially equate in the oil circuit cutting off between pilot handle valve 4 and the second main valve 52.
Two, for the ease of controlling, reduce time lag, to realize better the switching of Dual-pump flow-converging supply model and single pump supply model, switch valve 1 is preferably solenoid valve, for example, it can be bi-bit bi-pass solenoid directional control valve, it has connection (right position in Fig. 1) and disconnects (left position in Fig. 1) two kinds of working staties, certainly under other situations, also can adopt other forms of electromagnetic switch valve, cut off as long as can realize the connected sum of the oil drain out of pioneer pump and the hydraulic control end of pilot operated directional control valve 2.On this basis, for make this hydraulic system can according to load behavior in time, the supply model of automatic switchover main pump, the reverse feedback hydraulic system of the present embodiment also preferably includes discharge capacity regulation unit.
Refer to Fig. 2, this discharge capacity regulation unit comprises pressure transducer 9 and controller 11, and wherein, pressure transducer 9 is for detection of the working pressure of actuator 12; Controller 11 is connected with pressure transducer 9 and switch valve 1 signal, while exceeding predetermined value (corresponding to unusual service condition) for the working pressure value of obtaining when pressure transducer 9, control switch valve 1 electric with in connected state, thereby make main pump overall work under single pump supply model.
It will be appreciated by those skilled in the art that, under unusual service condition, load increases, actuator is in low speed action or stop action, the working pressure of actuator increases, and most of hydraulic oil falls from relief valve 10 overflows, thereby by detecting the working pressure of actuator 12, can judge whether under unusual service condition, to determine whether to switch the mode of operation of main pump entirety; Be that controller 11 judges whether to carry out flow rupturing operation according to the working pressure information obtaining from sensor 9, if working pressure information is greater than predetermined value, illustrate that now hydraulic system is under unusual service condition, during system energy consumption is serious, oil temperature continues to rise, the timely control switch valve of this Time Controller 11 1 electric with in connected state, and then make pilot operated directional control valve 2 can bring into play above-mentioned effect.
Three, as previously mentioned, under single pump supply model, the first main pump 81 works on to actuator's 12 fuel feeding, and for the ease of further reducing system capacity loss, above-mentioned the present embodiment provides reverse feedback hydraulic system can also comprise the first shuttle valve 61 and the first reduction valve 71, wherein, the filler opening of the first reduction valve 71 communicates with the oil drain out of pioneer pump 3, and oil outlet communicates with the first input end C1 of the first shuttle valve 61, the second input end C2 of this first shuttle valve 61 communicates with the feedback hydraulic fluid port Df of the first main valve 51, and the output terminal C3 of the first shuttle valve 61 is connected to the stroking mechanism of the first main pump 81, like this can be by regulating the first reduction valve 71 to control the oil pressure of the first input end C1 of the first shuttle valve 61, in the time that the oil pressure of first input end C1 is greater than the oil pressure of feedback hydraulic fluid port Df of the first main valve 51, the output terminal C3 of the first shuttle valve 61 communicates with first input end C1 and acts on the stroking mechanism of the first main pump 81, and then the discharge capacity of the first main pump 81 is adjusted, to reduce further the discharge capacity of the first main pump 81 under unusual service condition, and then can further reduce the hydraulic fluid flow rate that feeds to actuator 12, thereby can further reduce the energy loss producing because of relief valve 10 overflows.And under nominal situation, can control the first reduction valve 71 ends, now the second input end C2 of shuttle valve 61 communicates with output terminal C3, and the first main pump 81 still carries out discharge capacity adjustment according to the oil pressure of the feedback hydraulic fluid port Df of the first main valve 51.
As previously mentioned, under unusual service condition, although the second main pump 82, not to actuator's 12 fuel feeding, but still has certain energy consumption; In order further to reduce the now energy consumption of the second main pump 82, the reverse feedback hydraulic system that the present embodiment provides can also comprise the second shuttle valve 62 and the second reduction valve 72; The filler opening of the second reduction valve 72 communicates with the oil drain out of pioneer pump 3, and oil outlet communicates with the first input end of the second shuttle valve 62; The second input end of the second shuttle valve 62 communicates with the feedback hydraulic fluid port Ef of the second main valve 52, and the output terminal of the second shuttle valve 62 is connected to the stroking mechanism of the second main pump 82.The second reduction valve 72 and the second shuttle valve 62 carry out the principle of discharge capacity adjustment and aforementioned the first shuttle valve 61 and the first reduction valve 71 to the second main pump 82 that the discharge capacity of the first main pump 81 is adjusted to principle are similar, hereby do not repeat.
In addition, for the ease of regulating the oil pressure of first input end of the first shuttle valve 61 and/or the second shuttle valve 62, the first reduction valve 71 and/or the second reduction valve 72 are preferably electric proportional pressure-reducing valve, the first reduction valve 71 can be the first electric proportional pressure-reducing valve, and the second reduction valve 72 can be also the second electric proportional pressure-reducing valve.Can regulate respectively by controlling the input current value of the first reduction valve 71 and the second reduction valve 72 thus the oil pressure of the first input end of the first shuttle valve 61 and the second shuttle valve 62, and then be convenient to respectively the first main pump 81 and the second main pump delivery be regulated to control.Further, if also comprise the scheme of aforementioned " two " part, the first electric proportional pressure-reducing valve and/or the second electric proportional pressure-reducing valve can also be connected with controller 11, can also control by controller 11 input current of the first electric proportional pressure-reducing valve and/or the second electric proportional pressure-reducing valve, and then control the oil pressure of the first input end of the first shuttle valve 61 and/or the second shuttle valve 62.
In addition, can be integrated in same valve piece be in reverse feedback regulating valve block 14 for the first reduction valve 71, the first shuttle valve 61, the second reduction valve 72 and the second shuttle valve 62.
Four, for the ease of the installation of valve, it is in flow cut-off valve piece 13 that switch valve 1 and pilot operated directional control valve 2 can be integrated in same valve piece.Correspondingly, as shown in Figure 1, relief valve 10 and pressure transducer 9 can be integrated in actuator 12.
It will be appreciated by persons skilled in the art that above-mentioned the first main pump 81 and the second main pump 82 are variable displacement pump.It should be noted that; above-described embodiment is all to describe as an example of two main pumps example; for arranging and also can solve the large problem of system capacity loss under unusual service condition more than the scheme of two main pumps on basis of the present utility model, also should be within the utility model protection domain.
As shown in the above, in the reverse feedback hydraulic system that the utility model embodiment provides, when actuator bears compared with heavy load and in high pressure, high flow capacity, when slow-speed of revolution operating mode, switch valve is communicated with, the hydraulic oil of pioneer pump oil drain out acts on the hydraulic control end of pilot operated directional control valve by switch valve, make pilot operated directional control valve commutation, now pilot operated directional control valve is in the second working state, the hydraulic oil of two actuator ports of pilot handle valve cannot act on two hydraulic control ends of the second main valve, the hydraulic oil of two hydraulic control ends of the second main valve is realized oil pressure balance by pilot operated directional control valve simultaneously, the second main valve is in meta.Change thus the working state of main pump entirety, switch to part pump by original many pumps interflow supply and supply with.Therefore, the reverse feedback hydraulic system that the utility model embodiment provides can change by above-mentioned switch valve and pilot operated directional control valve the working state of main pump entirety, when actuator is subject to load excessive and under load high pressure, high flow capacity, slow-speed of revolution operating mode, creep into and suppress when dead as carried motionless or unit head on master winch, make main pump switch to part pump supply model by many pumps interflow supply model, main pump entirety supply flow reduces, and then reduces energy waste, improves the reliability of hydraulic system.
The utility model is other embodiments also provide a kind of rotary drilling rig, this rotary drilling rig is provided with above-mentioned reverse feedback hydraulic system, because above-mentioned kind of reverse feedback hydraulic system has above-mentioned technique effect, therefore, the rotary drilling rig that is provided with this reverse feedback hydraulic system also should possess corresponding technique effect, its specific implementation process is similar to the above embodiments, does not hereby repeat.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. a reverse feedback hydraulic system, comprising: the first main pump, the second main pump, the first main valve, the second main valve, relief valve, actuator, pilot handle valve and pioneer pump; It is characterized in that, also comprise:
Switch valve and pilot operated directional control valve;
The oil drain out of described pioneer pump is connected to the hydraulic control end of pilot operated directional control valve by described switch valve;
Described pilot operated directional control valve is arranged on the oil circuit between described pilot handle valve and the second main valve, and it comprises two kinds of working staties;
Under the first working state, the first actuator port of described pilot handle valve and the second actuator port communicate with the first hydraulic control end and the second hydraulic control end of described the second main valve respectively by described pilot operated directional control valve;
Under the second working state, described pilot operated directional control valve cuts off the oil circuit between described pilot handle valve and the second main valve, and the first hydraulic control end of the second main valve and the oil pressure of the second hydraulic control end are equated.
2. reverse feedback hydraulic system according to claim 1, is characterized in that, at described pilot operated directional control valve, under the second working state, the first hydraulic control end and the second hydraulic control end of described the second main valve communicate by described pilot operated directional control valve; Or the first hydraulic control end and the second hydraulic control end of the second main valve are all connected to fuel tank.
3. reverse feedback hydraulic system according to claim 1, is characterized in that, described switch valve and pilot operated directional control valve are integrated in flow cut-off valve piece.
4. reverse feedback hydraulic system according to claim 1, is characterized in that, also comprises the first shuttle valve and the first reduction valve; The filler opening of described the first reduction valve communicates with the oil drain out of described pioneer pump, and oil outlet communicates with the first input end of described the first shuttle valve; The second input end of described the first shuttle valve communicates with the feedback hydraulic fluid port of described the first main valve, and the output terminal of described the first shuttle valve is connected to the stroking mechanism of described the first main pump.
5. reverse feedback hydraulic system according to claim 4, is characterized in that, also comprises the second shuttle valve and the second reduction valve; The filler opening of described the second reduction valve communicates with the oil drain out of described pioneer pump, and oil outlet communicates with the first input end of described the second shuttle valve; The second input end of described the second shuttle valve communicates with the feedback hydraulic fluid port of described the second main valve, and the output terminal of described the second shuttle valve is connected to the stroking mechanism of described the second main pump.
6. reverse feedback hydraulic system according to claim 5, is characterized in that, described the first reduction valve and/or the second reduction valve are electric proportional pressure-reducing valve.
7. reverse feedback hydraulic system according to claim 5, is characterized in that, described the first reduction valve, the first shuttle valve, and the second reduction valve and the second shuttle valve are integrated in reverse feedback regulating valve block.
8. according to the reverse feedback hydraulic system described in claim 1 to 7 any one, it is characterized in that, described switch valve is solenoid valve.
9. reverse feedback hydraulic system according to claim 8, is characterized in that, also comprises discharge capacity regulation unit, and described discharge capacity regulation unit comprises:
Pressure transducer, for detection of the working pressure of described actuator;
Controller, is connected with described pressure transducer and switch valve signal, while exceeding predetermined value, controls described switch valve in connected state for the working pressure value of obtaining when described pressure transducer.
10. a rotary drilling rig, is characterized in that, is provided with the reverse feedback hydraulic system described in claim 1 to 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420409322.7U CN204003698U (en) | 2014-07-23 | 2014-07-23 | Reverse feedback hydraulic system and rotary drilling rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420409322.7U CN204003698U (en) | 2014-07-23 | 2014-07-23 | Reverse feedback hydraulic system and rotary drilling rig |
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| Publication Number | Publication Date |
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| CN204003698U true CN204003698U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420409322.7U Withdrawn - After Issue CN204003698U (en) | 2014-07-23 | 2014-07-23 | Reverse feedback hydraulic system and rotary drilling rig |
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| CN (1) | CN204003698U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235090A (en) * | 2014-07-23 | 2014-12-24 | 北京市三一重机有限公司 | Negative-feedback hydraulic system and rotary drilling rig |
| CN113107352A (en) * | 2021-05-18 | 2021-07-13 | 恒天九五重工有限公司 | Rock-entering control device and method for rotary drilling rig |
-
2014
- 2014-07-23 CN CN201420409322.7U patent/CN204003698U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104235090A (en) * | 2014-07-23 | 2014-12-24 | 北京市三一重机有限公司 | Negative-feedback hydraulic system and rotary drilling rig |
| CN104235090B (en) * | 2014-07-23 | 2016-08-24 | 北京市三一重机有限公司 | Negative feedback hydraulic system and rotary drilling rig |
| CN113107352A (en) * | 2021-05-18 | 2021-07-13 | 恒天九五重工有限公司 | Rock-entering control device and method for rotary drilling rig |
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