DE1063363B - Device for volume-based dosing of wood chips or similar fibrous material - Google Patents

Description

GERMAN

,1. Pat Bl. V.M

Devices are already available for the volumetric dosing of wood chips or similar fibrous material known that with a storage bunker, one occupied with driving pins or needles, diagonally arranged conveyor belt and a device arranged above the latter for scraping excess funded goods are provided. The walls of the storage bunker are there for the purpose of avoidance has been arranged conically downwards from bridge formations of the property. Devices for stripping off excess conveyed material have already been arranged to be adjustable. The known Volume metering devices, however, worked imprecisely because the fibrous material was uneven Density and has a density in the storage room with changing fill levels due to the weight of the goods gets uneven density. If in such a metering device more compacted fibrous material is processed, is after the volume-based dosage in terms of weight in a certain time unit a larger amount is conveyed than is possible with the same good in the loosened state. The known devices therefore also used a device by which the amount of heaped up goods were subsequently corrected and the goods were equalized at the same time.

The object of the invention is to remove the wood chips or other fibrous material before the actual To loosen up the dosing process in order to achieve a uniform density of the goods. aside from that the material to be dosed should only feed the actual dosing mechanism in approximately even quantities be spent so that there is no new, uneven density in the good due to a higher or lower filling level on the dosing conveyor belt. .

The device according to the invention uses a storage bunker in a manner known per se with driving pins or needles occupied, inclined conveyor belt and one above the latter Device for scraping off excess conveyed goods and is characterized by a A device that keeps the filling level in the storage bunker more or less constant, a device built into the storage bunker as a floor, opposite to the direction of travel of the conveyor belt driven removal or feeder drum and a known per se, at the delivery end the conveyor belt arranged, spaced to this adjustable and with opposite to the direction of travel curved ejector pegs, driven opposite to the direction of travel of the conveyor belt Throwback roller.

In front of a metering device known per se, there is a storage bunker with a removal or supply

contraption

for volumetric dosing

of wood chips or the like

fibrous material

Applicant:

Wilhelm Lödige,

Paderborn, Elsener Str. 9 c,

Fritz Lödige,

Paderborn, Elsener Str. 9 b,

and Dipl.-Ing. Josef Lücke,

Paderborn, Bessenstr. 2

Wilhelm Lödige, Fritz Lödige
and Dipl.-Ing. Josef Lücke, Paderborn,
have been named as inventors -

conveyor drum installed as floor. By working together the removal or feeder drum, the dosing conveyor belt, the throwback roller and, if necessary, two slides, a uniform filling level on the metering conveyor belt and a uniform density of the wood chips used for metering is achieved. The removal or The feeder drum suitably has drive pins that are inclined to the front in the running direction or are curved at the ends. Between the removal drum and the bunker wall and between the removal drum and the lower end of the decreasing conveyor belt are the adjustable slides arranged, which allows the exit opening of the chips from the bunker and the degree of filling of the To regulate the space between the removal drum and the lower end of the conveyor belt. Above A height-adjustable locking bar for rough pre-metering can be arranged on the metering conveyor belt be.

The boundary walls of the storage bunker are expediently conical in a manner known per se being arranged further below or the slip or Flowability of the volume adjusted in Inclined position carried out.

The drawing shows a diagram of the metering device according to the invention.

The metering device has a bunker space 1 and a storage space 2. The bunker walls 1 α are

909 607/332

As already mentioned, in order to avoid congestion (bridging with fibrous material), it is arranged conically further downwards. The good to be dosed, e.g. B. Wood chips in a chip-laying system is dropped into the bunker room 1 via a running conveyor belt 4 or by another known conveyor device. Since the conveying device brings in the goods in uneven quantities, a switching flap 3, which is balanced with a counterweight, is installed at the top in order to maintain an approximately even degree of filling in the bunker space 1. The switching flap 3 switches off the drive of the feeder device 4 via an electrical contact when; a certain filling level is exceeded, and switches the drive on again when a certain filling level is not reached. In the Bünkerraum 1 is a rotating in the direction of the arrow Entnahmebzw. Distributor drum 5 installed. On this drum driving pins 5 α are arranged at certain regular intervals, which are either inclined or curved in the direction of travel. The upper passage opening between the bunker wall la and the removal drum 5 or driver pin 5a can be adjusted by a slide 6 for the fibrous product to be dosed in each case. A further slide 7 is arranged between the bunker removal drum 5 or driver pin 5 α and the metering conveyor belt 8 or the driver pin 8 a arranged thereon. When this slide is pushed in far, it prevents the chips brought in by the removal or feeder drum 5 from the bunker from being removed by the driver pin 8a of the metering conveyor belt 8. The driving pins 5 a on the removal or feeder drum 5, which are inclined or curved for gripping, take, when a certain degree of filling is exceeded in the storage space 2, the chips taken from the bunker space 1 back with it until the degree of filling in the storage space 2 has dropped. Above the metering conveyor belt 8 or 8 a, a height-adjustable locking bar 9 is arranged, with which the throughput quantities on the conveyor belt are approximately regulated. A larger amount of material should always be picked up from the dosing conveyor belt 8, so that a larger part of the incoming chip flow can always be thrown back into the storage space 2 through the overbuilt dosing recirculation roller 10 with the driving pins 10 α arranged on it.

The driver pins 10 a on the throwback roller 10 are therefore at the ends in the direction of travel Slightly curved at the back, so that when equalizing the incoming flow of chips, it falls onto the flow of chips Apply a slight pressure to compensate for any cavities in the chip flow, so that at the upper end of the metering conveyor belt 8 always a uniform amount of chips in the full width of the metering conveyor belt is thrown off. The diameter of the throwback roller and the speed of rotation must match each other be coordinated so that the chip flow in terms of height without shifts in the chip flow is equalized and the thrown back 'chips are thrown back into the storage space 2.

By the cooperation of the removal or feeder drum 5, the metering conveyor belt 8, the Rear throwing roller 10 and the position of the slide 6 and 7 is achieved that in the storage space 2 in the full bandwidth, an approximately even degree of filling is always maintained and the good to be dosed is evenly loosened before it is due to the interaction of the metering conveyor belt 8 and the Rear throwing roller 10 is subjected to the actual metering process.

If fibrous goods are to be stored temporarily,

ίο z. B. wood chips, in the chipboard manufacture one Want to use bunker 1 or 1 α for larger volume, it is useful to the boundary walls la to arrange the bunker in a certain inclination, so that the weight of the one in the bunker Goods are predominantly carried by the lower side wall of the bunker in order to facilitate the removal or to relieve feed drum 5 thereby. The angle of inclination of the bunker walls must be adjusted to the slipperiness or flowability of the bunker contents.

Claims (5)

Patent claims: 1. Device for volume-based dosing of wood chips or similar fibrous material with a storage bunker, one occupied with driving pins or needles, arranged at an angle Conveyor belt and a device arranged above the latter for scraping off excess conveyed Good, characterized by keeping the filling level in the storage bunker more or less constant Device, one built into the storage bunker as a floor, opposite to the direction of travel of the conveyor belt driven removal or feeder drum (5) and a known per se, at the delivery end of the conveyor belt (8) arranged, spaced to this adjustable and with opposite the direction of rotation curved rear thrower pin (10 a) provided opposite to Conveyor belt running direction driven reverse roller (10). 2. Apparatus according to claim 1, characterized by inclined forward in the running direction or driving pins (5 a) curved at the ends on the removal or. Feeder drum (5). 3. Device according to claims 1 and 2, characterized by adjustable known slide (6 or 7) between the removal or feeder drum (5) and the bunker wall (1 α) and between the former and the lower end of the decreasing conveyor belt (8). 4. Device according to claims 1 to 3, characterized by an adjustable height Locking strip (9) over the conveyor belt (8). 5. Apparatus according to claim 1, characterized by a well-known drop flap (3) in the storage bunker (1), balanced with a counterweight, for automatic control of the material inflow in the latter.
60 Considered publications:
German Patent No. 967 505;
German interpretation H21762Ib / 38 (published May 24, 1956);
British Patent No. 510,669;
U.S. Patent No. 1,623,629. 1 sheet of drawings © 909 607/332 8.59