DE171399C - - Google Patents

Description

• -rf »

ι I i

IMPERIAL

PATENT OFFICE

CLASS 5Oe. GROUP

The invention offers an innovation in dust collectors, which consist of several rotatable Filter surfaces consist of separate chambers. Of the known such The present innovation differs from dust collectors in that as a result the rotary movement of the filter surfaces of the dust air alternately a free, not through Filter surfaces obstructed passage from one

ίο Chamber to the other and alternating this passage is blocked. The rotation of the different filter surfaces takes place at different times, so that the passage between two chambers is released, while the free passage each of these chambers in free communication with the other adjacent chamber is closed. The speed and the angle of rotation of the filter surfaces can furthermore according to the invention of the nature of the dust and the speed of the dust air flow can be changed accordingly.

The invention is shown in the drawing on a dust collector in an exemplary embodiment, namely FIG. 1 shows a longitudinal section and FIG. 2 is a plan view.

The dust collector s consists of two or more dust chambers I, II, III and IV, depending on the size of the mills or other crushing systems. The same are made of wood or another building material, e.g. B. sheet metal, and are made airtight. As usual, a funnel b \ 2> ² , b ³ , b * with a waste pipe c, which can be closed by a slide d, is located under each chamber. By means of a fan or the like, the dusty air is blown into the chamber I through a tube α widening in the interior of the chamber. As a result of the expansion of the tube α , the dusty air is distributed over the entire chamber and thrown ^{against the filter frame e 1 arranged in a known manner between the first and second chambers.} Filter frames e ² , e ^{3 are} provided between the other chambers. These frames are covered with a permeable fabric, linen or the like or a metal screen. A large part of the dust sinks due to its own weight in the chamber I, collects in the funnel b ¹ and is conveyed from this into sacks or into an airtight screw. The remaining dust is thrown against the filter surface e ¹ and largely sticks to it.

To now, since the filter frame e ¹ closes the connection with the chamber II for the most part and thus prevents pressure equalization, an unfavorable pressure increase in the chamber or. To prevent harmful reaction after the supply pipe α , the filter surface e ¹ is rotated by a mechanical device in certain time segments after the chamber II, so that a

Claims (3)

free passage opening from chamber I to chamber II is created. The air still containing dust therefore flows into dust chamber II, in which exactly the same process takes place as in chamber I etc., so that the air enters the last chamber IV, almost completely cleaned. An inclined filter e4 is arranged above this chamber in a known manner, through which the air must pass before it can pass through the vent g into the open, completely cleaned. The meshes of the filter surfaces e1, e2, e3, e4 gradually decrease in size, as usual, so that even the finest dust particles are retained by the last filter. When the filter frame is rotated in sections towards the next chamber, a free connection is established between the individual chambers, while when the filter frame is rotated in the other direction, the free connection is interrupted again. During the latter movement, the filter frames hit against laterally attached, felt-lined stop strips, whereby the filters are cleaned in a known manner, in that the dust stuck in their pores falls down. The swinging back and forth of the filter surfaces can be effected by any device. In order to prevent the air from flowing through all chambers at the same time, the filters are opened and closed at different times. To achieve the latter, in the embodiment shown in the drawing, a shaft h set in rotation by any motor by means of a belt pulley k is arranged outside the chambers on the end face, which shaft h carries cranks i at its ends with pins attached to the filter frame connected by rods /. Instead of the belt pulley k, a stepped pulley can be provided for the purpose of changing the speed of the shaft h and thus the oscillating back and forth of the filter surface. · The size of the deflection of the filter surfaces can also be changed as required by adjusting the cranks i. Any known type can be selected for the filter surfaces; B. instead of the rotatable filter frame, louvre-like hinged filters can be selected. Godfather nt-A ν Proverbs: 1. Dust collector, which consists of several chambers separated from one another by rotatable filter surfaces, characterized in that by rotating the filter surfaces (e ¹ , e ² , e ³ ) a connection between the chambers that is not hindered by filter surfaces is alternately established and canceled, so that the air is only allowed to pass freely from one chamber to the other at times. 2. Dust collector according to claim 1, characterized in that the filter surfaces moving levers are so dependent on each other that the rotation of the different filter surfaces to takes place at different times. 3. Dust collector according to claim 1, characterized in that the crank mechanism moving the drive rods of the filter surfaces is made adjustable such that the speed and the size of the deflection of the filter surfaces (e \ e ² , e ³ ) can be changed. 1 sheet of drawings.