DE6813297U - DEVICE FOR SAMPLING BULK GOODS. - Google Patents

Description

G 68 13 297.8-7101

Our reference: B 1339 » THE BIRMINGHAM SMALL ARMS COMPANY LIMITED

Armory Road, Small Heath Birmingham 11 / Great Britain

Device for taking samples from bulk material

The invention relates to a device for taking samples of bulk material while this is in a stream falls, and in particular to a device for taking samples of bulk material consisting of small pieces, such as coal, in which a sample container is made to take samples, each time consist of at least one passage through the falling stream of material, and to deliver the material removed therefrom.

According to the invention, the device for taking samples of bulk material while it falls in a stream, a sample container, which is curved to Movement is mounted on a pair of arms hinged at a distance from one another, the movement being imparted to the container by means of a movable, resilient connecting element, such as for example a Chain or rope *

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The sample container is preferably arranged so that it can be moved in the most opposite directions through the stream, means being provided for taking a sample of the material while the container moves in each direction. Preferably is the container is positioned and can operate to cross the stream at an angle approximating a right angle to the material flow.

Bas compliant joint member for moving the loading, -ν hälters is preferably a chain, and is preferential

wisely arranged so that it moves over or between arcuate guide surfaces. Optionally, a endless chain or rope can be used.

The invention is described below with reference to the drawing. Show in it:

1 shows a partial section through the sampling device along the line B-B in FIG. 2;

FIG. 2 shows a section along the line C-C in FIG. 1.

According to the drawing, the device for sampling ■ 'took in the construction shown as an example

a "device for sampling coal while it protrudes into a stream indicated by dashed lines 1 in FIG. 1, which flows from the front drum 2 of a conveyor 3 is discharged after it has passed through the conveyor in the direction indicated by an arrow A has been transported, a frame 4 on which a pair of radially arranged arms 5 are pivotally mounted

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are, to which a sample container 6 is rigidly attached, which hangs in its normal rest position in front of and over the front run 2 of the conveyor 3. With each side of the Container 6 is connected to a heavy duty roller chain 7, and each chain runs over a sprocket 8, wherein these sprockets each on one end of a shaft 9 are keyed, which is rotatably mounted in bearings 10 on an upper structure of the frame. You chains 7 hang down from the sprockets 8, pass over a second pair of sprockets 11 and then extend

up, and the brew of each chain is on the frame

' attached. You sprockets 11 are wedges aufell on shafts 12, which are arranged in bearings 13 on a frame H which carries a set of counterweights 15. The frame »H is in a vertical shaft-like construction \ 16 arranged in which it led to vertical movement } as described below.

r With the shafts 9 is a reversible electrical on

Drive unit 17 coupled to transmit the desired movements to the chains 7 to the container € and to operate the counterweights 15. The container 6 pivots in an arc around the pivotably arranged arms 5 during its upward and downward movements, whereby it is kept at precise speed by the chains 7, the fixed guide angles? 18 run, preferably on a shaft 19 for receiving samples are attached, which are dispensed from the container 6, which is usually wider than the material stream 1 and is provided with a cutting opening which is set approximately at right angles to the material flow. These The cutting opening has one for the leilgröfi to be collected

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suitable width so that a typical portion is taken.

The sample container is provided with an outlet flap 20 which has means for automatically opening the flap to deliver the sample to the socket 19 and for the subsequent automatic bottom closing of the flap. In the arrangement shown in Pig, 1, the flap 20 is held in its closed position by a two-armed lever 21, one arm of which is ver connected to a bolt 22 which engages the Auelaßklappe. The outer end of the lever 21 can contact an adjustable stop 23 which is attached to a suitable fixed part of the device. Contact between the arm 21 and the stop 23 causes the latch 22 to be released and thus the outlet flap to be released.

To automatically close the downwardly hanging outlet flap 20 is on a suitable fixed part of the Device an element 24 articulated to which a spring-loaded plunger 25 with an anti-friction roller 26 is attached at its outer end. This role protrudes into the path of the sample container 6 and is arranged so that when the container is attached to it Moved past on its way to the delivery position, the element 24 around its bearing point 27 from moved out of the path of the container. However, when the container 6 moves down against the roller 26, when the outlet flap 20 is open, the roller contacts the flap and there the pivoting movement of the element 24 is limited in this direction, causes a continued

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Set movement of the container so that the flap is closed and the latch 22 is opened. Another Movement drives the roller 26 only against its spring-loaded plunger 25, whereby the container 6 the possibility given to continue its downward movement.

During operation of the device, the container 6 starts with the outlet flap 20 closed from its upper rest position and swings in an arc downwards, where it is accelerated to a predetermined speed under the action of the motor-driven chains 7 before it enters the material flow 1. The speed of the container remains constant while it is in the stream and collects half of the fraction. When the container emerges from the flow during its downward movement, it is decelerated under the control of the drive unit 17 and brought to rest under the front run 2 of the conveyor 3. The direction of movement of the container is then immediately reversed so that it pivots upward and is accelerated to a predetermined speed which is equal to the downward speed before entering the material flow. The container is held at this speed as it passes through the stream and collects the second half of the fraction.

The container 6 is brought to rest in its initial upper position where the outlet flap 20 automatically by releasing the latch 22 in the manner described above, the material is attached to the shaft 19 submit for further processing or collection,

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whereby the door rests within the Sohaohtes to a To prevent spilling.

The sample container remains in this position until a timer indicates that another portion has been withdrawn shall be. The above process is then repeated, the outlet flap 20 of the container being automatically closed by the element 24 in the manner described above before the container is on its way down at full speed.

Claims (8)

Eatintzanspruohe 1. Device for taking samples of bulk material while it falls in a stream naoh below, characterized duroh a sample container that is attached to a End of a pair of spaced arms for arcuately moving at a controlled speed through the flow of material Hinduroh is arranged, wherein the movement of the sample container is imparted by means of a movable, resilient transmission element connected to the container. 2. Device according to claim 1, characterized in that the resilient transfer element is a chain 1st, which is arranged for movement via chain wheels and curved guide surfaces. 3. Device according to claim 1 or 2, characterized by a frame on which the spaced apart, supporting the sample container Arms are arranged and verbun with the container chains that run over sprockets that are on attached to the frame and arranged above the upper arcuate path of travel of the container extend downward from the top sprockets, through others on a vertical one Sprockets attached to the movable counterweight run and then attach to the Extend the frame upwards. tttt t · # »« · ·· 4. Device according to claim 3 ₃ net, dad the kftten duroh the otmvefe driven by waves, AOd? bicycles are attached and the «practicable» arranged on the flags Drive unit are coupled, making the th leg of applying an arc-shaped and downward movement on the sample container as well apply vertical motion to a counterweight that is in a sohaoht-like construction / \ of the frame arranged 1st. 5. Device according to one of the preceding before, characterized in that the sample container is provided with a hinged flap which can be opened and closed automatically during the arcuate movement of the container, whereby material collected in the container is discharged into a correspondingly arranged shaft can be. 6. Device according to claim 5, characterized in that the flap of the container in its ge O closed layer connected to the container by a steered bolt is held, which is operated by a lever arranged on the container, which can contact a stop element which is attached to the frame, thereby causing the latch to loosen and the flap to be released, when the container reaches the top layer of its arcuate trajectory. I ψ · W * » ff t t * 7. Device according to claim 5 and 6, characterized in that that during the initial arcuate downward movement of the container its downward hanging open flap can contact an element extending into the path of the container and is only movable in the upward direction, the arrangement being such that upon contact with this Element the door is closed and secured by its latch, while the container is at its The element is displaced in an arc-shaped upward movement into the unloading position and moves past it. 8. Device according to claim 5 and 7, characterized in that the element consists of a spring-loaded The plunger consists of a suitable part of the frame for the limited arcuate upward movement and downward movement is arranged around a fixed bearing and at its outer end a roller carries, which protrudes into the path of the container. H1I2I720.8.70