Impeller blasting equipment for surface of steel tube in integrated direct-buried thermal insulation pipe

Abstract

The invention relates to impeller blasting equipment for the surface of a steel tube in an integrated direct-buried thermal insulation pipe. The impeller blasting equipment comprises an equipment structure steel frame, an impeller blasting device, a pipeline conveying pipe, a projectile screening device, a projectile collecting device and a projectile dust collection device, wherein the impeller blasting device comprises an impeller blasting working cavity at the upper part and a shot blasting mechanism; the pipeline conveying device comprises a cylindrical roller way conveying rack, a conveying roller wheel and a first conveying motor; the projectile screening device comprises an inner screening drum and an outer screening drum which are arranged coaxially; the projectile collecting device comprises a circulating projectile collection cavity and an abrasion projectile collection cavity; the projectile dust collection device comprises a dust collection box, a dust collection motor, anexhaust duct and an air splitting dust collection mechanism; and a projectile conveying mechanism, a second conveying motor, a reverse motor and an induced draft passage are arranged on the equipmentstructure steel frame. According to the equipment, the outer surface of the steel tube can be impacted comprehensively, and the quality of blast single projectiles is guaranteed. Therefore, the impeller blasting effect is improved.

Description

technical field [0001] The invention relates to an integrated direct-buried heat preservation pipe inner steel pipe surface shot blasting derusting equipment. Background technique [0002] Directly buried thermal insulation pipes have the advantages of high-efficiency thermal insulation, waterproof, anti-corrosion, flame-retardant, cold-resistant, etc., and are easy and quick to construct, and have a long service life. They are widely used in various pipelines in the fields of municipal heating and transportation. In the early stage of the production process of the direct buried insulation pipe, before the inner and outer pipes are assembled, the outer surface of the inner steel pipe needs to be shot blasted to remove rust, so as to ensure the process effect of foaming in the subsequent interlayer to form the insulation layer. [0003] The structure of the traditional shot blasting machine is a shot blasting chamber with a box structure. The shot blasting device is installed...

AI Technical Summary

Problems solved by technology

In the process of repeated recycling, the projectiles of this type will continue to wear, break and become thinner. When some projectiles are worn and thinned, the impact force will be reduced during shot peening surface treatment, resulting in the failure to achieve the required surface treatment effect; at the same time, the surface During the treatment, some fine impurities such as oxide skin on the surface of the workpiece will be knocked off, mixed in the projectile, and the surface treatment effect will also be reduced

At the same time, these small-diameter projectiles and impurities are very easy to cause pipeline blockage. Once blocked, it is necessary to stop the shot blasting machine and remove the pipeline for dredging, which affects the production efficiency of the shot blasting machine.

In the prior art, this defect is solved by regularly taking out the projectiles and screening out small-diameter projectiles and slag, but this method is still relatively troublesome and requires shutdown operations

[0004] In addition, the existing shot blasting machine is fixed in the shot blasting direction, and the impact on the surface of the pipe fittings is uneven, and there will be missed areas; when the shot blasting machine is working, it will generate a lot of dust when it hits the surface of the workpiece, which will easily affect the surface treatment effect of the workpiece and The environmental sanitation is reduced after the dust leaks out. Although there are some simple filter structures for dust removal in the prior art, the efficiency of dust removal is not only low, but also the filter element needs to be cleaned and replaced frequently.

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