An automatic anti-jamming hydraulic control system for an electric proportional control rock drill
A hydraulic control system and electric proportional technology, applied in the direction of fluid pressure actuation system components, mechanical equipment, servo meter circuits, etc., can solve the problem that the control of complex procedures and motion laws cannot be realized, the control pressure is greatly affected by the flow rate, and cannot Realize the hydraulic system and other problems, and achieve the effect of automatic system anti-jamming, fast dynamic response speed and wide adaptability
Active Publication Date: 2017-11-07
XIANGTAN UNIV
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Problems solved by technology
Through the analysis, it is found that the control pressure of the ordinary pressure valve is greatly affected by the flow rate, the static pressure regulation deviation is large, the continuous automatic control of the pressure or flow rate of the hydraulic system cannot be realized, and the control accuracy is low, the system is complex, and complex procedures and movements cannot be realized. Regular control, narrow scope of application
Method used
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[0021] The present invention will be further described below in conjunction with the accompanying drawings.
[0022] Such as figure 1 As shown, including propulsion circuit, motor rotation circuit, electric proportional control circuit. The propulsion circuit includes a propulsion pump 12, and the propulsion pump 12 is a constant pressure pump with a pressure of 18MPa. The oil inlet of the propulsion pump 12 is connected to the fuel tank; the oil outlet of the propulsion pump 12 is connected to the P port of the anti-jamming reversing valve 9, and a first check valve 10 is provided on the connecting pipeline. The A port of the anti-jamming reversing valve 9 is connected with the rodless chamber of the propulsion cylinder 8, the B port of the anti-jamming reversing valve 9 is connected with the rod chamber of the propulsion cylinder 8, and the T port of the anti-jamming reversing valve 9 Connect back to the fuel tank. The oil outlet of the propulsion pump 12 is connected bac...
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The invention discloses an automatic anti-clamping hydraulic control system of an electric proportional control rock drill. The system comprises a propelling loop, a motor revolving loop and an electric proportional control loop; the propelling loop includes a propelling pump; an oil tank is connected with a P port of an anti-clamping reversing valve through the propelling pump; an A port and a B port of the anti-clamping reversing valve are respectively communicated with a rodless cavity and a rod cavity of the propelling cylinder; the electric proportional control loop includes an electronic control unit and two electric proportional pressure valves; inlets of the two electric proportional pressure valves are respectively connected with an outlet of a second one-way valve; outlets of the two electric proportional pressure valves are respectively connected with two oil ports of a remote hydraulic control end of the anti-clamping reversing valve; and the electronic control unit is respectively connected with a speed sensor on a hydraulic motor rotating shaft and the two electric proportional pressure valves. The system can realize continuous control of the hydraulic system pressure or flow through electric-hydraulic signal conversion, is convenient for installation and use, and is fast in dynamic response speed, high in control precision and easy to realize closed-loop control.
Description
technical field [0001] The invention relates to an anti-jamming control system of a rock drill, in particular to an automatic anti-jamming hydraulic control system of an electric proportional control type rock drill. Background technique [0002] The hydraulic rock drilling jumbo is a special equipment used for rock drilling and excavation. In some tunnels and underground engineering and other large-face rock excavation projects, the hydraulic rock drilling jumbo plays an irreplaceable role. The hydraulic rock drilling system is the core part of the hydraulic rock drilling jumbo. When working, the hydraulic motor drives the drill rod to rotate, and the hydraulic system pushes the hydraulic cylinder to push the drill rod forward, so that the drill bit continues to drill rock forward. During the rock drilling process, due to uneven rock texture, cracks and lava, the drill bit will be deflected, causing the drill rod to be skewed and jammed. Once a stuck drill accident occurs,...
Claims
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IPC IPC(8): F15B11/17F15B13/06F15B21/08
CPCF15B11/17F15B13/06F15B21/087F15B2211/20538F15B2211/20576
Inventor 刘金刚李晓星易达云廖金军
Owner XIANGTAN UNIV