Cable reel hydraulic drive and cable limiting length control system assembly

Abstract

The invention provides a cable reel hydraulic drive and cable limiting length control system assembly; the hydraulic drive system of the cable reel comprises a pressure reducing valve, a speed regulating valve, a reversing valve and a valve block; when a car is backed, the cable reel automatically rotates, winds and takes the cable back, thus leading the car not to press the cable; a cable limiting pull-out length control system comprises two check valves, a reversing valve and a valve block; and when the car moves forward and after the cable is pulled to the maximum length, the car stops and the cable can not be broken. The front part of the valve block is perforated with a C hole; the pressure reducing valve is arranged in an oil duct which is positioned at the left lower side of the valve block and communicated with the C hole; the delivery outlet of the pressure reducing valve is connected with the speed regulating valve at the left upper side thereof; after speed regulation, the output oil duct is connected with the electromagnetic reversing valve arranged at the upper back part thereof, and then extends out from the D outlet and E outlet at the front part of the valve block; the front part of the valve block is perforated with hole A and hole B respectively; the two check valves are respectively plugged in an oil duct which is communicated with the hole A and the hole B, and then arranged at the upper front part of the valve block; the outlets of the two check valves intersect at one oil duct and are connected with the reversing valve at the left side thereof, and then output from the T1 outlet in front of the valve block.

Description

(1) Technical field: [0001] The invention belongs to the field of engineering machinery, and relates to an integrated device of a cable drum hydraulic drive and cable limit length control system matched with a motor-driven hydraulic excavation loader. (two) background technology: [0002] Tunnel excavator is a new type of construction machine that organically combines backhoe hydraulic excavator and conveying device. It is mainly used for cleaning and loading operations after tunnel blasting in underground projects such as tunnels and subways. [0003] At present, most cable drums are driven by electric motors. In order to ensure that the speed of the winding line is synchronized with the speed of the vehicle and that the tension on the cables is moderate, the control system is complicated and the cost is high. Recently, hydraulic drive mode has also been used, but the cable drum hydraulic drive and cable limit length control system are connected by two sets of hydraulic ci...

AI Technical Summary

Problems solved by technology

[0003] At present, most cable drums are driven by motors. In order to ensure that the speed of the winding line is synchronized with the speed of the vehicle and that the tension on the cables is moderate, the control system is complicated and the cost is high.

Recently, hydraulic drive mode has also been used, but the cable drum hydraulic drive and cable limit length control system are connected by two sets of hydraulic circuit tubes, and the valves are connected by tubes. The pipeline layout takes up a lot of space and is inconvenient for installation and maintenance. prone to leaks

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