Mechanical arm applicable to spray coating of pipeline inner wall

Abstract

The invention discloses a mechanical arm applicable to the spray coating of a pipeline inner wall. The mechanical arm comprises a bracket, wherein the bracket is of a cylindrical structure; transverse moving rollers are symmetrically arranged on the circumferential side wall of the bracket; a circumferential moving roller is arranged on the bracket between the transverse moving rollers; a drive device is mounted at the joint between the transverse moving rollers and circumferential moving roller and the bracket; and the end of the transverse moving rollers and circumferential moving roller away from the bracket is movably placed on the pipeline inner wall. In the invention, a four-way spray head is adopted to perform spray coating of the pipeline inner wall so that the spray coating is more uniform and quicker; the transverse moving rollers and circumferential moving roller can move transversely and rotate in the pipeline, and thus automatic movement is realized in spray coating; without manual operation, non-uniformity of manual spray coating is avoided, the spray coating efficiency is high, and the effect is good.

Description

technical field [0001] The invention relates to the technical field of mechanical arms, in particular to a mechanical arm suitable for spraying the inner wall of a pipeline. Background technique [0002] A pipeline is a device used to transport gas, liquid or fluid with solid particles connected by pipes, pipe connectors and valves. Usually, after the fluid is pressurized by blowers, compressors, pumps and boilers, it flows from the high-pressure part of the pipeline to the low-pressure part, and it can also be transported by the pressure or gravity of the fluid itself. Pipes are widely used, mainly in water supply, drainage, heat supply, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, hydraulic engineering and various industrial devices. When the flow rate of the fluid is known, the size of the pipe diameter depends on the allowable flow rate or allowable frictional resistance (pressure drop). When the flow rate is high, the pipe ...

AI Technical Summary

Problems solved by technology

[0003] When manufacturing pipes, some pipes used in special positions need to be sprayed with specific materials on the inner wall. However, most of the existing spraying methods rely on manual spraying, which has low spraying efficiency and is prone to uneven spraying, especially for longer lengths. It is very difficult to manually spray the deep part of the pipeline, and it is very easy to cause insufficient material spraying thickness, resulting in unqualified pipelines and increasing production costs. Therefore, we have designed a mechanical arm suitable for spraying the inner wall of the pipeline to solve the above problems

Images