Proportional valve is the more modern engineering construction equipment in the modern world. It integrates electro-hydraulic and hydraulic system with load sensing system as the basis. It is controlled by the pilot type electro-hydraulic proportional valve. With the aid of on-board computer and screen display system, the operation and monitoring And quality assurance system into the man-machine dialogue, and there are certain characteristics of the monitoring phase. Advanced electronic control systems, highly reliable hydraulic systems, efficient work facilities, all of these, as long as the operator can master and operate in accordance with the provisions of the manufacturers, the host system of mechanical accidents can be avoided. However, proportional valve and proportional valve method to introduce our time is not long, the domestic equipment performance and proportional valve method little understanding of the equipment is not familiar with the process, understand the process of equipment performance and do not quite understand. Over the years, many mechanical accidents and borehole accidents have occurred during the construction of proportional valves, which have caused enormous economic losses and the accident continues. The whole process, the proportion of the main winch in the work of non-stop work, the level of drilling efficiency, the probability of drilling accidents occurred, the length of life of the rope with the main winch agencies are closely related. According to statistics, 60% to 80% of the accident rates occurred during the ascent and descent, causing the rope to break due to the effect of overlap extrusion wear and impact inertial force, and even lead to the leakage of the main winch motor, and also allow the user to move the main hoist lifting force Obviously inadequate. This problem is not caused by the operator, should be drilling rig designers urgently need to be resolved. Developers from the following aspects to solve this problem proportional valve system lift: (1), reduce the weight of proportional valve drill pipe, the main choice of low-density high-strength aluminum alloy material. (2) Increase the length of the main winch drum to avoid chaos ropes, proportional grooves on the surface of the proportional valve drum to reduce the possibility of the steel ropes overlapping due to the multi-layer winding. (3), the main winch drum into a single layer from the multi-winding, increase the proportion of the valve drum length and increase the diameter of the drum. (4), due to the single-layer proportional valve wound to achieve constant tension increase. Proportional valve for the user, do not use too high speed, because the proportional valve wire rope wear increases with increasing speed, and secondly do not bring heavy load with a sudden increase or braking, should be smooth start and brake, reduce Due to a sudden start or brake to the main winch drum that section of the rope serious wear and tear, but also pay attention to the location of the winch fixed end of the right to use the right twist rope. ã€Print】 ã€Close】
