| 摘要 |
<p>The present invention relates to an pneumatic device for cleaning ventilation ducts which includes a guiding air hammer, a turning conduit, a air-supply pipe and a slewing mechanism for the conduit. The guiding air hammer is a hollow spherical or hemispherical shape, connected to the turning conduit and provided with jets of air for cleaning and jets of air for guiding on its rear arc wall. When cleaning the ventilation duct, according to the principle of air motion, the guiding air hammer cleans out of dust lain on the inner walls and in all the corners of the ventilation duct with the air-supply pipe stretching means retracting and stretching the air-supply pipe, without an operator entering the ventilation duct. The air-supply pipe stretching means may be controlled by manually operation or program composition. The design of the invention may be used for cleaning all ventilation ducts with polygonal section. According to the present invention, the pneumatic device for cleaning ventilation ducts has compact structure, has an advantage of automated operation, may clean any corner of the ventilation duct, decreases the number of operators and reduces the labor strength of the operator.</p> |
