Double-pump hydraulic control loop of key drilling action of cutting drill rig

Abstract

A double-pump hydraulic control loop of a key drilling action of a cutting drill rig comprises a double linkage load-sensitive variable pump set, a double oil intake linkage load-sensitive multi-way valve, a rotary motor, a propulsion motor, a drilling logic control block, a rotation guide handle, a propulsion guide handle, and a hydraulic oil tank. An oil inlet of the double linkage load-sensitive variable pump set is connected with the hydraulic oil tank. An oil outlet and a load-sensitive opening are connected with an oil inlet and a load-sensitive opening of the double oil intake linkage load-sensitive multi-way valve respectively. Each valve pressure difference compensator of the load-sensitive multi-way valve is provided with an external control opening. The external control openings are connected with the drilling logic control block. The rotation guide handle and the propulsion guide handle are connected with the drilling logic control block or a guide control opening of the load-sensitive multi-way valve. The double-pump hydraulic control loop has the advantages that power head rotation-proportion-controlled propulsion is achieved, independent load-sensitive control of rotation and propulsion is achieved, propulsion speed is increased, and the like.

Description

Technical field [0001] The invention relates to a double-pump hydraulic control circuit for key rock drilling actions of a cutting drilling rig. Background technique [0002] The cutting drilling rig is a new type of rock drilling rig. Its operating mechanism is high-speed rotary crushing drilling. It has the outstanding advantages of high speed, high efficiency, simplicity and convenience for drilling operations in shale, sandstone and other rock formations. Comprehensive analysis of the current hydraulic systems of cutting drilling rigs of various brands , are all developed based on the simple improvement of the hydraulic system of small or medium excavators. Compared with the excavator, the cutting drilling rig subtracts the three actions of the swing arm, the breaker and the bucket, and increases the three actions of the power head propulsion, the power head rotation, and the air compressor. The breaker unit and the bucket unit realize the control of the three actions o...

AI Technical Summary

Problems solved by technology

The propulsion speed is slow under working conditions such as hole-forming rod lifting, connecting rod empty lifting, and unloading rod empty pushing, or the rotation of the power head is stopped, and the flow of the main control valve rotary joint is merged into the main propulsion oil circuit to increase the speed of the rod lifting, but stop Swivel, if a large piece of gravel slides into the hole, it will cause a sudden sticking of the drill

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