Composite hydraulic control system of blast-furnace top distributing device

Abstract

The invention discloses a composite hydraulic control system of a blast-furnace distributing device. The control system comprise an independent closed-loop control loop, at least one centralized control loop and at least one switching loop, wherein the independent closed-loop control loop is used for controlling each hydraulic cylinder and realizing single-position closed-loop control of each hydraulic cylinder and position dynamic compensating control of the three hydraulic cylinders during the motion of the distributing device; the at least one centralized control loop controls the three hydraulic cylinders when the independent closed-loop control loop can not work normally; and the at least one switching loop can realize the automatic switching between the independent closed-loop control loop and the centralized control loop. The invention can not only improve the off-position precision of the distributing device cylinder, but also ensure that the cylinders are synchronous during the angle-variable change process of the distributing device, thereby improving the distribution precision of a blast furnace and simultaneously ensuring that the reliability and the security of the whole control system are greatly improved by adopting composite control.

Description

technical field [0001] The invention belongs to the technical field of metallurgical machinery, and discloses a composite hydraulic control system for a top distributor of a blast furnace, which is used for controlling the material distribution process of a bellless top of a blast furnace. Background technique [0002] The control of the blast furnace roof distributor is a key link in the blast furnace distribution system, and its control accuracy directly affects the distribution accuracy of the blast furnace distribution system. Most of the existing distributors adopt a simple centralized hydraulic control method, that is, one valve controls the actions of three hydraulic cylinders, and the hydraulic oil in the three hydraulic cylinders can move in series with each other. In this control mode, the control accuracy of the distributor mainly depends on the size of the gap between the guide wheel installed on the support ring and the guide rail installed on the shell. The ga...

AI Technical Summary

Problems solved by technology

In this control mode, the control accuracy of the distributor mainly depends on the size of the gap between the guide wheel installed on the support ring and the guide rail installed on the shell. The gap between the guide rail and the guide wheel is small. In fact, this method is difficult to ensure the accuracy of the cloth. Because the gap between the guide rail and the guide wheel is reduced, it will increase the difficulty of machining and assembly, and increase the manufacturing cost. At the same time, under high temperature conditions It is also easy to cause the distributor to be stuck

In addition, due to the eccentric load of the lower part of the distributor, the support ring of the distributor driven by the hydraulic cylinder is always in a state of alternating force, which intensifies the impact and wear between the guide wheel and the guide rail

Images