System for spraying a powder circumferentially around a pipe
US4038942A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 4, 1976 |
| Grant date | Aug 2, 1977 |
| Priority date | — |
| Expiry date | Aug 4, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B14/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A system for spraying powder circumferentially around a pipe comprising a yoke engagable with the pipe for more than 180.degree. of the pipe. The yoke has a powder dispenser mounted thereon and means are provided for driving the yoke circumferentially about the pipe. The system also includes a powder suspension device and a blower-suction device providing a stream of air under pressure to the powder suspension device for creating an air-powder suspension therein. The powder dispenser has an inner housing and an outer housing both having openings adjacent the surface of the pipe and arcuately shaped to conform with the curvature of the pipe. The outer housing forms a space around the periphery of the inner housing. A first conduit connects the powder suspension device to the inner housing of the powder dispenser to provide a spray or stream of air-powder suspension to the surface of the pipe. Another conduit connects with the outer housing of the powder dispenser and the suction inlet of the blower-suction device to suck excess powder from the weld joint and return it to the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.