Vibrating screen crusher

Details Vibrating screen crusher Vibrating screen crusher

1991-01-07

1992-01-21

Rosenbaum, Mark

Solid material comminution or disintegration

Apparatus

Comminuting surface provided with openings to permit...

241 94, 241 95, 241262, B02C 100

Patent

active

050821873

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

A device for comminuting, in particular, softer materials such as, coal or the like, the device including at least two vertically spaced, superposed grates disposed in the outlet region of a bunker and equipped with crushing elements of which at least one grate is stationary and at least one further grate is movable translatorily in the horizontal direction relative to the stationary grate.
DE-B 1,167,163 (German Auslegeschrift/laid-open application) discloses a vibrating screen crusher whose vibrating box is equipped with a striking grate at the bottom and is covered at the top, at least in part, by an impact plate. The material passes through this vibrating box in the longitudinal direction and the box is caused to vibrate in the vertical plane by means of two crankshafts equipped with counterbalancing means. The crankshafts are disposed underneath the vibrating box. The impact plate as well as the striking grate are provided with facing crushing teeth. At the vibrating box, in the region of the last third of the impact plate, breaker hammers are pivotally mounted at pivot arms. By way of pneumatic springs the pivot arms are supported at the vibrating box.
DE-C 650,461 discloses a comminutor for coke, coal, and similar substances that includes a crushing machine equipped with picks and a vibratory table carried by longitudinal rods on which the material to be comminuted moves along the vibratory table is being caused to move in a way that produces shaking jolts of a magnitude that corresponds throughout to the size of the pieces brought underneath the various groups of picks.
The drawbacks of these two devices are essentially that the masses to be handled may produce damage to the grates and to the peripheral components due to the superposition of vibrations. In both cases, the passage of the comminuted material is essentially horizontal with no high throughputs being possible due to the materials to be processed.
Additionally, DE-B 1,223,235 discloses a breaker grate for the discharge of a reaction furnace, wherein the grate is formed of a fixed grate composed of parallel grate rods having sharp-edged raised portions and of a movable grate. The movable grate is formed by a frame which includes transverse connecting rods disposed between the raised portions of the fixed grate rods and equipped with breaker heads that cooperate with the grate rods.
The drawbacks of this prior art device are essentially that in this arrangement, certain size categories can no longer be drawn in and broken up but roll along only on the edges of the breaker heads insofar as the dimensions of the grain are larger than the amount of lateral shift of the grate. Since the grains are generally not pre-sorted before they are charged onto the grate, the danger exists here of overloading the system since larger chunks clog the intake region. The efficiency of such a system can thus be considered to be relatively low.


SUMMARY OF THE INVENTION

Based on DE-B 1,223,235, it is the object of the invention to improve an apparatus of the above-outlined type to the extent that the highest possible throughput is realized with a simple structural configuration.
This is accomplished by the invention by the combination of the following features:
the upper grate facing the bunker is translatorily movable relative to the grate or grates disposed therebelow, with the crushing elements of the upper grate having their tips oriented downwardly;
the crushing elements of the upper grate as well as those of the grate immediately therebelow have an approximately triangular cross section, with the crushing elements of the stationary grate having their tips oriented downwardly;
the tips of the crushing elements of the movable grate extend into the free space of the crushing elements of the stationary grate disposed therebelow, with the horizontal thrust of the movable grate being selected so that no contact takes place between the individual crushing elements.
Appropriate modifications of the subject matter of the invention a

REFERENCES:
patent: 139173 (1873-05-01), McNeir et al.
patent: 353857 (1886-12-01), Hobart
patent: 1584721 (1926-05-01), Bland
patent: 2208165 (1940-07-01), Sheahan
patent: 3823881 (1974-07-01), Grob
patent: 4580732 (1986-04-01), Mantell

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