DE102012025185A1 - Furnace feeding system for bulk goods, has worm shaft driven by ratchet, which is designed as clamping ratchet, where lever is rotatably arranged on round rod, and round rod is arranged on circumference that is parallel to pipe piece - Google Patents

Abstract

The furnace feeding system has a worm shaft, which is driven by a ratchet. The ratchet is designed as a clamping ratchet, where a lever (6) is rotatably arranged on a round rod (7), and the round rod is arranged on the circumference that is parallel to a pipe piece (5). The pipe piece is mounted on a shaft (11) to be driven as its internal diameter is slightly larger than the shaft diameter. The pipe piece has a cutout (12) in the area of round rod and lever, through which the driven shaft is visible.

Description

Firing system for bulk material with mechanical, metered feed.

In bulk material furnaces with mechanical, metered feeding of the bulk material into the combustion chamber, the reliability and a low price of the plant are in the foreground of the considerations. At too high a price, the system is too expensive, then you better heat with fuel oil. If the operating safety is too low, the system will cause too much trouble, which can not be reconciled with a permanent use of the system.

Previous firing feeders for bulk material usually work with a screw conveyor, which is driven by a geared motor with high torque at the transmission output. Difficulties these plants the screw, which can clog through the bulk material, especially at slow speed and the coupling between the worm and the drive gear, because a high torque must be transmitted, and the gear motor itself, because a geared motor with very low-speed gearbox and high Power delivery is very expensive in purchasing.

The object is to provide a firing system for bulk material with mechanical, metered supply, in which the price is much lower than in conventional systems, in which the screw is less prone to clogging, in which the coupling between the screw and the force-emitting point is very cheap and in which instead of a very expensive geared motor with very high gear ratio, very low transmission output speed and very high transmission output torque, another geared motor is used, namely a geared motor with a lot, especially about 10 times, higher transmission output speed and correspondingly lower gear output torque, which is much cheaper.

The solution to this problem consists in a Feuerungsbeschickungsanlage for bulk material with mechanical, metered feed according to claim 1, characterized in that the worm shaft ( 4 ) is driven by a ratchet.

In a further embodiment of the invention, the worm shaft ( 4 ) designed as a hollow shaft and contains internally a Rührfingerantriebswelle.

In a further embodiment of the invention, the ratchet is designed as a clamping ratchet, wherein a lever ( 6 ) rotatable on a round rod ( 7 ) is arranged, which in turn on the circumference and that longitudinally parallel to a pipe section ( 5 ), which itself loosely on the shaft to be driven ( 11 ), because its inner diameter is slightly larger than the shaft diameter, and the pipe section has in the region of the round rod and the lever a section through which the shaft to be driven ( 11 ) able to see. By moving the long lever end ( 9 ) are piece of pipe ( 5 ) and wave ( 11 ) Firmly connected to each other firmly and with further lever movement, the shaft is rotated a bit.

In a further embodiment of the invention is on the circumference of the pipe section ( 5 ) of the ratchet a weight ( 8th ), in particular a rod is welded, approximately horizontally going away to the side. This weight causes the pipe piece to rotate reliably down when the lever lowers. So everything is ready for the new working game of lever lifting.

In a further embodiment of the invention, immediately before the burner ( 1 ) a channel coming from above ( 2 ), in which the bulk material falls to the beginning of the burner, so that the metering screw ( 3 ) is extremely short.

The invention has the following advantages:
The facility is very cheap. Short worm, low power consumption, cheap clutch, the drive cord and the ratchet are indeed the connection between shaft and gear motor and cheaper mittelschnellender geared motor, often enough a wiper motor. Agitator and metering screw can be operated at different speeds. The structure of the system is extremely simple. Even children can understand the system because they can touch anything and because the movements are slow. The system is therefore also a very effective, self-explanatory teaching material.

An economical use of the invention consists in the production and sale of heating systems, in particular for wood pellets, woodchips, cereal grains.

An application example is the plant described below. The burner consists of a box of heat-resistant cast steel with two centimeters wall thickness. Front and back, the box is open. On its four sides, it is surrounded by a closed sheet metal shell two centimeters apart on the outside. This creates a closed airspace around the box. A fan is located in this airspace.

The casting box is provided with a plurality of ventilation holes. The air is blown through the fan into the metal shell, spreads there and penetrates through the holes in the box inside.

At the open back of the box, the feeder is attached. From a channel that runs from top to bottom, the bulk material passes on a short screw and from there into the burner. With the help of the injected air, it is burned there. The new fuel, pushed from behind into the box, pushes the burning fuel and ash forward until the fuel burns out and the ash falls out of the burner.

The worm shaft is a hollow shaft. In her runs another wave, which is provided at the front with a Rührfinger and protrudes from the back of the worm shaft. The worm shaft is centered either in a longer pipe or with two (several) bearings at a distance from each other. The worm hollow shaft is itself the bearing for the inner shaft for the agitator drive.

The worm shaft is driven by means of a ratchet, in particular by means of a ratchet ratchet. The Rührfingerwelle is also driven by a ratchet, in particular by means of a clamping ratchet, or arranged conventionally with clutch and geared motor in the longitudinal axis. The ratchets are driven by means of medium-speed geared motor with crank and cord train.

LIST OF REFERENCE NUMBERS

1

burner

2

channel

3

slug

4

worm shaft

5

Pipe section of the clamping ratchet

6

Clamping lever with hole

7

round bar

8th

Revolving weight for the pipe section

9

long lever piece

10

short lever piece

11

to be driven wave

12

Cutout in the pipe section ( 5 )

Claims (6)

Furnace for bulk material with mechanical, metered feed, characterized in that the screw shaft ( 4 ) is driven by a ratchet. Furnace for bulk material with mechanical, metered feed according to claim 1, characterized in that the ratchet is designed as a clamping ratchet, in which a lever ( 6 ) rotatable on a round rod ( 7 ) is arranged, which in turn on the circumference and that longitudinally parallel to a pipe section ( 5 ), which itself loosely on the shaft to be driven ( 11 ), because its inner diameter is slightly larger than the shaft diameter, and the pipe section ( 5 ) has in the area of the round rod ( 7 ) and the lever ( 6 ) a section ( 12 ), by which the wave to be driven ( 11 ) able to see. Furnace for bulk material with mechanical, metered feed according to claim 1, characterized in that the screw shaft ( 4 ) is a hollow shaft and includes a further shaft, in particular a Rührfingerantriebswelle. Furnace for bulk material with mechanical, metered feed according to claim 2, characterized in that on the circumference of the pipe section ( 5 ) of the ratchet a weight ( 8th ), in particular a rod is welded, approximately horizontally going away to the side. Furnace for bulk material with mechanical, metered feed according to claim 1, characterized in that immediately upstream of the burner ( 1 ) a channel coming from above ( 2 ) is arranged, in which the bulk material falls to the beginning of the burner. Furnace for bulk material with mechanical, metered feed according to claim 2, characterized in that the cut-out ( 12 ) in the pipe section ( 5 ) between round bar ( 7 ) and levers ( 6 ) towards the long end of the lever ( 9 ) is so short that the lever on this side of the driven inner shaft ( 11 ) and that the distance between the round rod and cutout in the region of the short lever end ( 10 ) is larger than the short end of the lever ( 10 ) over the round rod ( 7 ) protrudes, so that the raised end of the long lever presses on the short end of the driven inner shaft.

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