A mobile internal and external spraying equipment for large-diameter steel pipes

Abstract

The invention discloses a mobile type internal and external spraying equipment for large-diameter steel pipes. However, the mobile trolleys are fixedly connected by connecting trolleys, and the two mobile trolleys are fixedly equipped with a rotating mechanism, which is used to clamp the steel pipe and drive the steel pipe to rotate. The other end of the guide channel is fixedly installed with an internal spraying machine. The lifting frame is fixedly connected with a cantilever rod arranged horizontally, and the cantilever rod is coaxially arranged with the steel pipe; the present invention can carry out internal and external spraying on steel pipes of different lengths and different pipe diameters, has strong applicability, and the whole machine occupies a small area and saves energy. Space, can be disassembled into several components, transported separately to the steel pipe construction site for spraying, saving transportation costs, can recycle excess paint on the surface of steel pipes, save resources, avoid resource waste, and reduce costs.

Description

technical field [0001] The invention relates to the technical field of plastic-coated steel pipes, in particular to a mobile internal and external spraying equipment for large-diameter steel pipes. Background technique [0002] Steel pipes are not only used to transport fluids and powdery solids, exchange heat, and manufacture mechanical parts and containers. It is also a kind of economical steel. Using steel pipes to manufacture building structure grids, pillars and mechanical supports can reduce weight and save metal by 20-40%. , and can achieve factory-like mechanized construction. Using steel pipes to manufacture road bridges can not only save steel and simplify construction, but also greatly reduce the area of ​​the protective layer, saving investment and maintenance costs. The steel pipe will produce a lot of waste on the lower surface of the long-term use Impurities and rust need to be re-sprayed to ensure its service life. Large-diameter steel pipes are not only heav...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a mobile type internal and external spraying equipment for large-diameter steel pipes. By placing the two ends of the steel pipes on the rotating wheels of the two rotating mechanisms respectively, according to the length of the steel pipes, it is set between two mobile trolleys. Fix the connecting trolley of corresponding length, place the cantilever rod in the sliding guide groove of the support block, and fix one end of the cantilever rod on the lifting frame, and pass the spraying pipe of the inner spraying machine through the spraying hole and extend to the spraying Outside the hole, pass the suction pipe of the inner recovery mechanism through the recovery hole and extend to the outside of the recovery hole, start the lifting motor one, the lifting motor one drives the threaded rod one to rotate through the pulley and the belt, and drives the threaded rod one to go up and down. The threaded rod 1 drives the support block to lift, and at the same time starts the lifting motor 2, the lifting motor 2 drives the threaded rod 2 to rotate, and drives the nut to lift, the nut drives the lifting frame to lift through the fixed rod, and drives the cantilever rod to lift, according to the steel tube The height of the cantilever can be adjusted according to the size of the diameter. The internal and external spraying equipment can spray the internal and external walls of steel pipes with a diameter of 1420-3020 mm and a length of 6000-20000 mm at the same time. Dismantled into several components, transported separately to the steel pipe construction site for spraying, saving transportation costs, this equipment can process three types of steel pipes, the first is the inner EP layer and outer EP layer plastic coated steel pipe, the second is the inner EP layer outer PE layer plastic-coated steel pipe, the third is the inner EP layer and outer 3PE layer plastic-coated steel pipe, which has strong applicability and solves the problem that traditional steel pipe spraying equipment cannot spray steel pipes with different diameters and lengths, poor applicability, and large floor space. Technical problems such as inconvenient transportation and high transportation costs;

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