Manufacturing method plastic lining composite steel pipe and its manufacturing equipment

A composite steel pipe and plastic-lined technology is applied in the field of manufacturing plastic-lined composite steel pipes to achieve the effect of high production efficiency and easy production automation.
CN1459368AInactive Publication Date: 2003-12-03SHANGHAI WEIBANG PIPELINE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI WEIBANG PIPELINE
Publication Date
2003-12-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

A technology for manufacturing plastic-lined composite steel pipe includes such steps as coating adhesive on the external surface of a plastic pipe, putting the plastic pipe in a steel pipe, sealing both ends of steel pipe by two blank covers, injecting compressed air into the plastic pipe, moving the steel pipe through an induction heater, and cooling for formation. Its advantages are high productivity and no damage to the coated zinc layer of steel pipe.
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Description

technical field

[0001] The invention relates to a method and a device for manufacturing a plastic-lined composite steel pipe, in particular to a method and a device for manufacturing a plastic-lined composite steel pipe by induction heating. Background technique

[0002] The steel pipe lined with plastic pipe is an alternative to galvanized steel pipe. It is made of hard polyvinyl chloride (PVC-U), chlorinated polyvinyl chloride (CPVC) and other plastic pipes lined with traditional hot-dip galvanized pipes. , used in conjunction with plastic-lined malleable iron pipe fittings, so the product has sufficient strength and has the function of preventing secondary pollution. It is an ideal environmental protection pipe in the world today. Plastic-lined steel pipes began to be developed and produced abroad in the 1970s. Compared with the inner coating technology of pipes, the plastic-lined technology has the following advantages: 1. The plastic-lined steel covers the metal complet...

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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