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
CN101004599AInactive Publication Date: 2007-07-25HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
Publication Date
2007-07-25
Estimated Expiration
Not applicable · inactive patent

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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.
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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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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