Plastic coating method and plastic coating device for steel pipe
A technology of plastic-coating and steel pipes, which is applied to the device and coating of the surface coating liquid, which can solve the problems of poor spray quality, easy wear of the anti-corrosion layer, uneven coating, etc., and achieve simple structure and low construction cost , the effect of uniform surface
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Embodiment approach
[0027] According to an embodiment of the present application, a plastic coating method for the outer wall of a steel pipe, the plastic coating method includes steps:
[0028] 1) Phosphate treatment or shot blasting treatment on the surface of the steel pipe;
[0029] 2) Heating the steel pipe to a predetermined temperature;
[0030] 3) Install pipe fixing devices at both ends of the heated steel pipe;
[0031] 4) Transfer the steel pipes with installed pipe fixtures to the spray booth;
[0032] 5) Spray the epoxy resin powder in the spray gun onto the surface of the rotating steel pipe in the spraying room. After the spraying, move the steel pipe out of the spraying room and transport it to the curing area. The coating on the surface of the steel pipe is cured to form an anti-corrosion layer.
Embodiment 1
[0033] Example 1 Steel pipe plastic coating device
[0034] The plastic coating device on the outer wall of the steel pipe includes: a spraying room, an internal spraying device and an external spraying device are installed in the spraying room, and a roller device is installed in the spraying room, and the roller device can drive the steel pipe to be sprayed to rotate to spray the surface of the steel pipe evenly.
[0035] The plastic coating process on the outer wall of the steel pipe is as follows:
[0036] refer to figure 1 , the embodiment of the present application discloses a pipe fixing device for pipe surface treatment, comprising: a main body 2, a disc-shaped structure with a first through hole 4, through which the pipe can pass, the first through hole The diameter of the hole 4 is greater than the outer diameter of the pipeline; the clamping unit 6 is connected to the main body 2, and the clamping unit 6 is detachably fixed to the pipeline; the acquired mechanism 8...
Embodiment 2
[0045] Example 2 Pretreatment of steel pipe surface
[0046] Surface pretreatment of small-diameter steel pipes, the treatment process is: put small-diameter steel pipe samples into 5%-7% NaOH solution and soak for 30 minutes to remove residual oil and other pollutants on the surface of the substrate; after cleaning and drying, For sandblasting roughening treatment, the surface to be sprayed is required to be uniform silvery white. The sandblasting parameters are shown in Table 1.
[0047]
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Abstract
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