Method and apparatus for producing inside and outside anticorrosion steel-plastic composite pipe
A technology of steel-plastic composite pipe and production method, which is applied in the field of innovative production method technology, can solve the problems of low film thickness, troublesome process, and only tens of microns, and achieve good economic benefits, good anti-corrosion effect, and simple process Effect
Inactive Publication Date: 2007-06-20
GUANGZHOU ADVANCE TECH
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Problems solved by technology
[0002] Steel pipes play a very important role in pipeline transportation, but the corrosion of steel pipes has always affected the service life of steel pipes
There is also a new internal and external anti-corrosion coating process, which adopts 3PE anti-corrosion structure on the outer layer of the steel pipe, and uses liquid epoxy coating on the inner layer. Because the liquid epoxy coating can be applied at room temperature, it solves the problem that the inside and outside cannot be treated at the same time, but This anti-corrosion technology also has many disadvantages: the thickness of a single film is only tens of microns, and it needs multiple sprays to achieve the required thickness, which is troublesome in process; the film thickness is low, and its anti-corrosion performance is very poor. Coating use; still need to be constructed in two steps, that is, first make the outer 3PE anti-corrosion layer, and then spray liquid epoxy
Method used
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Embodiment
[0022] The production method of the inner and outer anti-corrosion steel-plastic composite pipe of the present invention comprises the following steps:
[0023] 1) Pass the inspected steel pipes into the production line through the pipe loading platform 1;
[0024] 2) preheating the steel pipe by the preheating device 2;
[0025] 3) After the steel pipe is preheated, it is transported to the rust removal device in the steel pipe through the transmission line 3, and the inner wall of the steel pipe is derusted;
[0026] 4) After the steel pipe is derusted, the steel pipe is preheated by the heating device 6;
[0027] 5) The steel pipe enters the steel pipe inner spraying device 7 to spray powder coating on the inner wall of the steel pipe;
[0028] 6) After the steel pipe is sprayed, enter the external derusting unit 10 to perform external derusting on the outer wall of the steel pipe;
[0029] 7) After the outer rust removal, the outer rubber layer and the outer plastic lay...
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The production process of internally and externally anticorrosive composite steel-plastic pipe includes the following steps: feeding steel pipe to production line via pipe feeding platform; preheating steel pipe with preheater; inner derusting steel pipe with inside derusting unit; heating steel pipe with heater; painting powdered paint to inside the steel pipe with inner painting unit; outer derusting steel pipe with outer derusting unit; extruding glue layer and outer plastic layer with glue extruder and plastic extruder to outer wall of steel pipe successively; and cooling steel pipe with cooler. The production apparatus includes pipe feeding platform, preheater, inside derusting unit, heater, inner painting unit, outer derusting unit, glue extruder, plastic extruder and cooler. The present invention is simple, low in cost and easy operation.
Description
1. Technical field: [0001] The invention relates to a production method of an internal and external anti-corrosion steel-plastic composite pipe, which belongs to the innovative technology of the production method of the internal and external anti-corrosion steel-plastic composite pipe. 2. Background technology: [0002] Steel pipes play a very important role in pipeline transportation, but the corrosion of steel pipes has always affected the service life of steel pipes. Steel-plastic composite pipe (Patent No. 01257775.8) better solves the corrosion problem of small and medium-diameter steel pipes. It has low cost, corrosion resistance, and convenient connection, and has been widely used. However, medium and large-diameter pipes with a diameter of more than 250mm The production process of steel-plastic composite pipe will become more complicated, which will increase the cost rapidly and reduce the application. In the anti-corrosion of medium and large-diameter steel pipes, ...
Claims
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IPC IPC(8): B29C63/00
Inventor 李志雄马东生何永刚王骧骥
Owner GUANGZHOU ADVANCE TECH