Multicomponent medium inner-wall spraying device for nodular cast iron pipes

Abstract

The invention discloses a multicomponent medium inner-wall spraying device for nodular cast iron pipes and relates to the technical field of spraying of the nodular cast iron pipes. The multicomponent medium inner-wall spraying device comprises a trolley, an extending rod and a spraying mechanism, the spraying mechanism comprises an inner rotary cup and an outer rotary cup which rotate coaxially, the inner rotary cup is arranged in the outer rotary cup, a cup rim of the outer rotary cup as well as a cup rim of the inner rotary cup faces the horizontal direction, the cup rim of the outer rotary cup is sealed, the cup rim of the inner rotary cup is provided with a seal cover with a circular opening, a feed pipe is arranged in the circular opening, and a secondary mixing cavity is arranged between the inner rotary cup and the outer rotary cup. The walls of the inner and outer rotary cups are provided with first holes and second holes respectively, the first holes and the second holes are communicated with the secondary mixing cavity, and the outer rotary cup is driven to rotate by a motor. During spraying, multicomponent medium coating is sufficiently and uniformly mixed, and in a porous mist type spraying manner, spraying quality is guaranteed and production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of spraying of ductile iron pipes. Background technique [0002] Ductile iron pipe is a kind of cast iron pipe. Because it has the essence of iron and the properties of steel, the metallographic structure of the ductile iron pipe after annealing is ferrite plus a small amount of pearlite. It has good mechanical properties, excellent anti-corrosion performance, and ductility. Good performance, good sealing effect, easy installation and other advantages have been widely used. It is mainly used for water supply, gas transmission, oil transportation, etc. in municipal and industrial and mining enterprises. In the process of producing ductile iron pipes, one of the processes is to ductile iron The inner and outer pipe walls of the pipe are sprayed, and the outer pipe wall is easy to spray, but the spraying of the inner pipe wall is a problem. It needs to use some auxiliary tools to go deep into the pipe body for ...

AI Technical Summary

Problems solved by technology

[0002] Ductile iron pipe is a kind of cast iron pipe. Because it has the essence of iron and the properties of steel, the metallographic structure of the ductile iron pipe after annealing is ferrite plus a small amount of pearlite. It has good mechanical properties, excellent anti-corrosion performance, and ductility. Good performance, good sealing effect, easy installation and other advantages have been widely used. It is mainly used for water supply, gas transmission, oil transportation, etc. in municipal and industrial and mining enterprises. In the process of producing ductile iron pipes, one of the processes is to ductile iron The inner and outer pipe walls of the pipe are sprayed, and the outer pipe wall is easy to spray, but the spraying of the inner pipe wall is a problem. It needs to use some auxiliary tools to go deep into the pipe body for spraying to be barely completed. The work efficiency is very low, and the spraying The quality is also unreliable, especially for coatings containing multiple media. When preparing a coating mixed with various media, it is required that the mixing of various media be uniform so that the coating can achieve the desired effect. Before using the mixed paint, it must be oscillated or shaken, and then sprayed evenly, or sprayed while oscillating. However, it is impossible for us to spray while oscillating when spraying the inner wall of ductile iron, which is easy to cause when spraying. Spraying defects on the inner surface, and according to the current process, the spraying is carried out by using nozzles, the spraying is uneven, it is easy to cause nozzle blockage, affect the production rhythm, and work efficiency is low

Images