A hydraulic push steel emergency stop device for a heating furnace

Abstract

The invention relates to a hydraulic steel pushing scramming device for a heating furnace. The hydraulic steel pushing scramming device comprises a PLC, an intermediate relay for controlling a solenoid valve, a hydraulic pump motor control loop and a scramming button. A button cap, a button ejector rod, a scramming button base, a first scramming normally-closed contact, a second scramming normally-closed contact and a third scramming normally-closed contact are arranged on the scramming button. The button cap is fixedly connected to the top of the button ejector rod. The first scramming normally-closed contact, the second scramming normally-closed contact and the third scramming normally-closed contact are all connected with the scramming button base in series. The first scramming normally-closed contact is connected into a scramming signal input terminal on the PLC in series, the second scramming normally-closed contact is connected into the intermediate relay in series, and the third scramming normally-closed contact is connected into the hydraulic pump motor control loop in series. According to the hydraulic steel pushing scramming device for the heating furnace, through the three scramming normally-closed contacts arranged on the scramming button, the three-interactive steel pushing scramming effect is achieved, and continuous effectiveness of scramming in the steel pushing work is guaranteed.

Description

technical field [0001] The invention relates to the technical field of a hydraulic steel pusher for a steel rolling pusher type heating furnace, in particular to a heating hydraulic pusher emergency stop device for the steel pusher of a steel rolling pusher type heating furnace. Background technique [0002] The control system of the existing hydraulic steel pusher for the steel rolling heating furnace is usually composed of three parts, namely, the hydraulic pump (driven by a three-phase AC asynchronous motor) that provides stable hydraulic power, the solenoid valve that performs the steel pushing operation, and the operation command Programmable controller PLC. Among them, the emergency stop signal of the steel pushing action is generally controlled by the program inside the PLC. In order to make the steel pushing function stop in time when the steel is pushed in place during the feeding process of the stove (steel billet), it can prevent the stove from being jammed by exc...

AI Technical Summary

Problems solved by technology

However, in actual use, it is found that sometimes the PLC has received an emergency stop signal, but the solenoid valve controlling the action of the hydraulic valve is still energized, and the solenoid valve coil is de-energized but the valve is not completely closed. Still can't make the steel pusher stop pushing steel when stopped

The entire steel pushing process involves multiple mechanisms such as the controller, the actuator, and the controlled object. The above-mentioned ordinary emergency stop method only stops at the controller level and cannot meet the actual application requirements.

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