End-in end-out pusher-type reheating furnace steel feeding and discharging control system and control method

Abstract

The invention discloses an end-in end-out pusher-type reheating furnace steel feeding and discharging control system and a control method, and belongs to the technical field of steel pushing furnace steel inlet and outlet equipment. Photoelectric sensors I are arranged at working initiation positions of steel pushing machines or steel discharging machines; the photoelectric sensors I are electrically connected to the steel pushing machines or the steel discharging machines through PLC control units and reset detection journeys of steel pushing and steel fetching; photoelectric sensor II is arranged at a separating positon of a clutch I or a clutch II; a photoelectric sensor III is arranged at a closing position of the clutch I or the clutch II; and an upper computer, the photoelectric sensor II and the photoelectric sensor III are electrically connected to the clutch I or the clutch II through a PLC control unit. The end-in end-out pusher-type reheating furnace steel feeding and discharging control system and the control method have the beneficial effects that after each steel pushing and steel fetching action is finished, the steel pushing machine and the steel discharging machinecan automatically return to an initial position; the failure rate is lowered; besides, accurate clutch action can be performed; operation is convenient; steel pushing arms or steel fetching arms areon the same horizontal line after closing; and labor cost is reduced.

Description

technical field [0001] The invention relates to the technical field of steel inlet and outlet equipment for a pusher furnace, in particular to an end-in and end-out pusher type heating furnace steel inlet and outlet control system and control method. Background technique [0002] In the heating furnace designed by pushing steel into the furnace and tapping machine out of the furnace, the raw material size designed according to the structure of the finished product is divided into single row and double row. Action, push the billets into the furnace respectively, when the long billets are designed to be put into the furnace in a single row, the two sets of pushers need to move synchronously to push the billets into the furnace horizontally. When tapping, the tapping machine needs to realize single-group steel-taking arm action or two-group steel-taking arm synchronous steel-taking according to whether the billet in the furnace is single-row or double-row. [0003] But, in abo...

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Problems solved by technology

[0003] But, in above-mentioned process, there are following problems: 1, the steel pushing stroke of existing steel pushing machine and the steel taking stroke of steel tapping machine are generally set by the stroke of motor, promptly adopt encoder to detect two groups of pushing steel When the stroke of the driving motor of the pusher and the steel tapping machine reaches the steel pushing stroke or the steel taking stroke, the PLC controls the motor to stop rotating, and the pusher and the steel tapping machine are reset. However, when the steel pushing machine and the steel tapping machine are running During the process, the friction between the billet and the equipment will cause a mismatch between the detected speed and the actual speed, causing the steel pusher and the steel tapping machine to fail to return to the initial position. This cycle will gradually increase the error of the steel pushing or steel taking stroke. Thus affecting the normal operation of pushing steel and taking steel; 2. When a single row of steel pushing or tapping is required, the clutch between the two pushing machines or tapping machines cannot be engaged normally, or the steel arm can be pushed or steel taken after the engagement The arms are not on the same horizontal line, so that the steel billet is not on the horizontal line after pushing or taking the steel billet in place, and the billet will be skewed into the furnace, which will affect the tapping rhythm and timing output, and there may also be the risk of the heated billet falling during the furnace; 3. When the clutch is closed, it is usually necessary to use monitoring or on-site command to control the accurate engagement of the clutch of the pusher or tapping machine, which is time-consuming and laborious

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