Lining coating forming technology for spiral steel pipe inner wall and outer wall solvent-free epoxy ceramic coatings

Abstract

The invention discloses a lining coating forming technology for spiral steel pipe inner wall and outer wall solvent-free epoxy ceramic coatings. The technology comprises the following steps of carrying out shot blasting treatment on a spiral steel pipe product to be subjected to lining coating formation to make the inner wall and the outer wall of the spiral steel pipe product clean and expose theground color of the inner wall and the ground color of the outer wall of the pipe product; placing the pipe product subjected to shot blasting onto a riding wheel of a lining coating forming device,starting up a variable-frequency motor connected with the riding wheel to drive the pipe product to rotate, controlling the rotating speed of the pipe product to range from 30 revolutions per minute to 60 revolutions per minute, igniting a heating fire gun below the pipe product to preheat the pipe product, heating the pipe product to 50 DEG C to 70 DEG C, and shutting off the fire gun after heating; arranging one spraying trolley at one end of the inner wall of the pipe product and one spraying trolley at one end of the outer wall of the pipe product, using the spraying trolleys to spray solvent-free epoxy ceramic paint onto the inner wall and the outer wall of the pipe product at the same time, controlling the advancing frequency of the spraying trolleys to be within the range from 15 HZto 30 HZ, and forming the solvent-free epoxy ceramic linings on the inner wall and the outer wall of the pipe product; and placing the pipe product onto the riding wheel for rotation again till the pipe product cools and solidifies. With the lining coating forming technology for spiral steel pipe inner wall and outer wall solvent-free epoxy ceramic coatings, the manufacturing cost of inner linings and outer linings can be reduced, and the service life of spiral steel pipes can be prolonged.

Description

technical field [0001] The invention relates to a lining process, in particular to a lining process of a solvent-free epoxy ceramic coating on the inner and outer walls of a spiral steel pipe. Background technique [0002] Spiral steel pipes are used for water transmission. The inner lining is generally made of epoxy resin, and the outer lining is sprayed with epoxy asphalt layer. The lining process has the following problems: [0003] 1. The existing technology has very strict requirements on the roundness of the socket of the pipe, which must be a perfect circle, otherwise the lining cannot be made on the basis of it, and the pipe laying and installation cannot be carried out even if it is barely made. In addition, the deformation of the pipes caused by transportation needs to be rounded before installation. During the rounding process, the inner lining layer will fall off, and the installation work cannot be carried out normally. [0004] 2. The existing epoxy resin lini...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a solvent-free ring for lining the inner and outer walls of the spiral steel pipe that can solve the problems of the existing spiral steel pipe lining process that the lining layer is easy to fall off, which affects the normal installation, the use of metering equipment and the water quality sanitation. Oxygen ceramic lining process, which can reduce the manufacturing cost of inner and outer linings and prolong the service life of spiral steel pipes