Start-stop control system and method of spray gun of zinc spraying machine

Abstract

The invention discloses a starting-stopping control system and method used for spray guns of a zinc-spraying machine, and belongs to the technical field of nodular cast iron pipe zinc-spraying machine matching equipment. The starting-stopping control system comprises a PLC control cabinet, a human-computer interface operation box, a zinc-spraying trolley position detecting device and a zinc-spraying machine center positioning device, wherein the human-computer interface operation box, the zinc-spraying trolley position detecting device and the zinc-spraying machine center positioning device are connected with the PLC control cabinet. An original spray gun manual operation mode is broken through, and the spray guns are controlled independently and are based on the injection order from the ending side to the starting side. When one corresponding spray gun corresponds to the gun starting position of the starting side, the corresponding spray gun can start injection automatically. When one corresponding spray gun corresponds to the gun stopping position of the ending side, the corresponding spray gun can stop injection automatically. After the last spray gun stops injection, a zinc-spraying trolley is stopped, and gas supply of the zinc-spraying machine is also stopped. By the adoption of the system and method, the starting position and the stopping position of each spray gun can be controlled accurately, the phenomenon of zinc wire waste and the phenomenon that spraying quality is not up to standard are reduced, zinc-spraying quality of the zinc-spraying machine is effectively improved, and the labor intensity of employees is relieved.

Description

technical field [0001] The invention relates to a start-stop control system and method for a spray gun of a zinc spraying machine, and belongs to the technical field of supporting equipment for a zinc spraying machine for ductile iron pipes. Background technique [0002] In the production process of ductile iron pipes, in order to increase the corrosion resistance of the outer surface of ductile iron pipes, it is necessary to spray a layer of zinc or other anti-corrosion metal coatings on the outer surface of ductile iron pipes. Protection of cast iron pipes under strong soils, such as swampy soils, muddy soils, sulphate-containing soils, garbage soils and soils polluted by drainage. This process is done by using a zinc spraying machine. [0003] The zinc spraying machine is mainly composed of a frame, a clamping and rotating mechanism, a lifting mechanism, a zinc spraying mechanism, an electro-hydraulic control system and a smoke recovery system. The zinc spraying machine ...

AI Technical Summary

Problems solved by technology

[0005] 1. The starting position of the spray gun is inaccurate, sooner or later, resulting in the waste of zinc wire or the quality of zinc spraying is not up to standard;

[0006] 2. The stop position of the spray gun is inaccurate, resulting in waste of zinc wire or substandard quality;

[0007] 3. The top position of the zinc spraying machine is inaccurate, resulting in changes in the zinc spraying position on the outer surface of the cast pipe;

[0008] 4. The start and stop of the spray gun in the original control system cannot be controlled separately. Even if it can be controlled manually, the operator is too late to operate, and the labor intensity of the workers is high.

Images