Interlocking control system for falling, floating and depth sounding of main winch of rotary drilling rig

Abstract

The invention discloses an interlocking control system for falling, floating and depth sounding of a main winch of a rotary drilling rig, and belongs to an electro-hydraulic interlocking control mechanism. The interlocking control system comprises a central processing unit (CPU), a display connected with the CPU, a depth sounding sensor and a main winch floating control solenoid valve; and a main winch falling control solenoid valve and the CPU which are connected together are serially connected on a hydraulic handle control circuit for main winch falling for the rotary drilling rig. In the invention, when lowering depth of a drill bit is close to depth of a bore hole, the CPU stops outputting a control signal to a switch solenoid valve so as to cut off a pressure control oil circuit which causes falling of the main winch, and meanwhile the CPU outputs a control signal to automatically control main winch floating, which prevents a steel wire rope from being loosen. The interlocking control system has the beneficial effects that application range of equipment is enlarged, construction risk of a user is lowered, and operating strength of a driver is greatly reduced; and the interlocking control system has the advantages of simple structure, reliable performance and low cost, and is convenient in operation.

Description

technical field [0001] The invention relates to an electro-hydraulic control mechanism, in particular to a control system for the interlocking of falling, floating and sounding of the main winch of a rotary drilling rig. Background technique [0002] With the continuous acceleration of my country's infrastructure construction, rotary drilling rigs, as an emerging product in the construction machinery industry, have become the most ideal construction machinery for hole-forming operations in high-speed rail, elevated, and building foundation projects. Rotary drilling rigs are characterized by high efficiency, high quality, and environmental protection, and are the fastest-growing leading products of piling machinery. The current problem is that during the lowering process of the drill pipe of the rotary drilling rig, the control of the falling of the main coil is realized by controlling the hydraulic main valve to form a pressure difference between the A and B ports of the mai...

AI Technical Summary

Problems solved by technology

The current problem is that during the lowering process of the drill pipe of the rotary drilling rig, the control of the falling of the main coil is realized by controlling the hydraulic main valve to form a pressure difference between the A and B ports of the main coil motor. Fast; the floating and falling drill pipe of the main coil is to conduct the A and B ports of the motor of the main coil, and the motor rotates under the tension of the drill pipe's own weight. Due to the addition of a throttle hole, the falling speed of this method is relatively slow. It can only be used when the bucket is drilling in the hole

In the process of lowering the drill pipe, the driver can easily put more drill pipes to loosen the wire rope, causing the load of the wire rope to change sharply, deform, rotate, etc., thus reducing the service life of the wire rope. The staff also need to manually open the main volume and the float switch

Therefore, the driver needs to be extra careful when lowering the drill pipe, which increases the difficulty of operation

Images