System for controlling procedure for warming - up wrapped welded tube with zinc coated, and plastic painted double layer, and control method

A technology of process control system and double-layer rolled welded pipe, which is applied in the general control system, control/regulation system, sequence/logic controller program control, etc., and can solve the problems of high maintenance cost, difficulty in popularization and application, and high price , to achieve the effect of high control precision, simple control system structure and low cost

Inactive Publication Date: 2007-07-25
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
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Problems solved by technology

[0004] In the 1990s, my country introduced related production lines from abroad, which

Method used

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  • System for controlling procedure for warming - up wrapped welded tube with zinc coated, and plastic painted double layer, and control method
  • System for controlling procedure for warming - up wrapped welded tube with zinc coated, and plastic painted double layer, and control method
  • System for controlling procedure for warming - up wrapped welded tube with zinc coated, and plastic painted double layer, and control method

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Embodiment Construction

[0069] The embodiment of the control system of the present invention is shown in Fig. 1, and it is by the current transformer of measuring heating current, I / V converter, heating voltage interface, inlet temperature detector, voltage converter, the speed detector of measuring tube speed, pulse Composed of input interface board, A / D input interface board, industrial computer and its peripheral equipment, D / A output interface board, and actuator; the output end of the current transformer is connected to the input of the A / D input interface board through the I / V converter terminal, the heating voltage interface and the output terminal of the inlet temperature detector are respectively connected to the input terminal of the A / D input interface board through the voltage converter, the output terminal of the speed detector is connected to the input terminal of the industrial computer through the pulse input interface board, and the A / D The input interface board is connected with the ...

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Abstract

A system used for controlling the preheating course of roll-welding tube being zinc-plated and plastic-coated comprises current mutual inductor for measuring the heating current, I/V converter, heating voltage interface, entrance temperature detector, voltage converter, speed detector for measuring tube speed, pulse input interface board, A/D input interface board, industrial computer and its peripheral device, D/A output interface boar and execution mechanism. Its controlling method is also disclosed.

Description

technical field [0001] The invention relates to a control system and a control method for the preheating process of a galvanized and plastic-coated double-layer coiled welded pipe, and belongs to the technical field of the plastic-coated technology and the control method for the welded pipe. Background technique [0002] Galvanized plastic-coated double-layer coiled welded pipe, referred to as PVF pipe. The pipe is coated with polyvinyl fluoride (PVF) or polyvinylidene fluoride (PVDF) coating after the outer surface of the double-layer welded pipe is galvanized. Its outer coating is composed of three anti-corrosion layers: the innermost layer is a copper layer of 3-5 μm; the middle layer is a zinc layer of 20-30 μm; the outermost layer is a PVF or PVDF coating of 15-25 μm. Due to its extremely high anti-corrosion performance, it has become an ideal pipe material for brake pipes, oil pipes, and lubricating oil pipes of mid-to-high-end automobiles. [0003] The double-layer ...

Claims

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Application Information

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IPC IPC(8): G05B19/04G05B13/02
Inventor 吴学礼贾辉然李平孟凡华陆向辉甄然
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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