MEASURING INSTRUMENT FOR THE COLLECTION OF THE PROMOTION STRENGTH OF A SCHÜTTGUTSTROMES

The invention concerns a Meß mechanism for the collection of the promotion strength of a Schüttgutstromes after the generic term of the requirement 1 or 2.

With the well-known devices the bulk material falls on an impact plate or a percussion mechanism gemäß the DE-OS 29 47 414 Al, in such a manner, daß the impact plate in horizontal direction is preferably expenditure-steered. The Größ e of deflection serves as Maß for the delivery of the going through Schüttgutstromes.

Thus the bulk material with relatively groß it Kraft on the impact plate meets, becomes the bulk material gemäß the DE-OS 29 47 414 A1 diverted from its senkrechten drop direction by a guidance body laterally in such a manner, daß the Schüttgutstrom on the vertically arranged impact plate under an angle meets. In changed training the impact plate is in such a manner rounded off, daß the Schüttgutstrom on the impact plate meets and sharpening at the impact plate slides along.

It showed up, daß the well-known Maß did not take are sufficient, in order to arrange the impact effect of the bulk material so, daß with sufficient accuracy the quantity of the passing property to be determined can. Because the force Schüttgutstromes of the meeting the impact plate, even if the impact plate gemäß the DE-OS 29 47 414 A1 in the drop direction is bent, depends on a set of factors, which are not considered with the mechanisms after the state of the art and to become to be able.

The deflection of the impact plate is determined on the one hand by the speed, with which the bulk material meets the impact plate, furthermore by the impact angle of the Schüttgutstromes, schließ lich in addition, of the condition of the bulk material. Because it showed up, daß for example different grain fruits, like wheat, barley, oats and such a thing, in addition, corn, peas, beans and such with different cross-sectional speeds by that the impact plate pre-aged supply pipe run, which is together due on the one hand to the friction of the grains, thus essentially on the surface finish of the grains been based, on the other hand in addition, of the friction of the bulk material at the inner wall of the guide tubes depend.

Furthermore it was found, daß the accuracy of the collection of the going through Schüttgutstromes also dependent on the quantity of the passing bulk material is, thus of it whether the supply pipe for the bulk material is filled with bulk material over its entire cross section or only partially, as for example a diagonally employed supply pipe only grains within the range of its lower Mantellinie run along läß t.

Due to these influences errors arise with the measurement of the promotion strength of the Schüttgutstromes by emigration of an impact plate, which falsify in particular the linearity of the emigration of the impact plate as a function of the going through bulk material quantity.

Task of the invention is it, a Meß to indicate mechanism for the passing bulk material, with that the Meß mechanism so trained is daß independently of the kind of the passing bulk material and independently of the Größ e of the going through Schüttgutstromes one is preferably received linear from the going through Schüttgutstrom received emigration of the “impact plate” with reference to a Wägezelle, a Plattformwaage, and preferably in horizontal direction. In other words, purpose of the invention is it, a Meß to indicate mechanism, which with high accuracy the most different bulk materials independently of the run quantity accurately erfaß t.

This task is solved by the characteristic characteristic of the requirement 1 and/or 2.

Thus, daß the bulk material, as actually admits, gemäß the requirement 1 first on the wall of the percussion pipe and its deflection meets one than pipe trained percussion device the passing bulk material by means of an actually well-known, eccentrically mounted Wägezelle is measured, can from deflection on the going through bulk material quantity better as so far be concluded, there regarding the impact angles of the grains better erfaß t as the even or on one side bent impact plates used so far. This effect portion of deflection is in such a way improved in further arrangement of the invention, daß this first deflection a second deflection by on the bent, preferably curved bent pipe appropriate bulk material is overlaid, whereby the curvature favourably so groß is daß all grains of the Schüttgutstromes on the bent part of the percussion pipe a second time meet.

By the overlay of these two deflections as well as by the tubing training of the percussion device, as was it shown, a high linearity between the emigration of the percussion pipe and the going through quantity of the bulk material will already receive.

The linearity desired between the emigration of an impact plate and the bulk material läß t in addition, thus improve, daß gemäß to the requirement 2 of the percussion device a brake mechanism for the going through Schüttgutstrom is pre-aged, as for example the supply pipe within the range of the perpendicularly bent intake pipe exhibits a recess, in which first bulk material as pad collects itself as it were, so daß the grains of the Schüttgutstromes with their detour and the free case by impact on this pad to be braked. Into the intake pipe the grains of the bulk material pad arrive as it were in the overflow over the connection of the two pipes into the intake pipe and schließ lich into the percussion pipe. From the intake pipe, which is diagonally arranged to the percussion pipe, favourably under an angle of for instance 90°, thus the bulk material meets braked the internal wall of the percussion pipe and from this in the free case on the lowest curvature of this pipe.

In further arrangement of the invention the inlet of the Schüttgutstromes is braked to the percussion pipe by one or more screens. These screens are favourably in the supply pipe intended. Because it was found, daß in its run speed of braked Schüttgutstrom to substantially more exact Meß results leads, independently of the quantity of the passing bulk material and also from the condition of the bulk material.

In order to seize also very small quantities of passing bulk material surely, the screen consists favourably in further arrangement of the invention of two screen parts, which release an opening between itself. The screen parts are symmetrically to the lower Mantellinie of this pipe arranged, so daß the bulk material passing within the range to this Mantellinie without brakes the screen passes.

In order not to expose small bulk material quantities to the braking action of the bulk material pad, the bulk material in further arrangement of the invention, passing through unhindered within the range of the screen parts the supply pipe, meets a slant, on which the bulk material in the direction of the percussion pipe wall, planned behind the opening between the screen parts, by which bulk material pad is led without brakes.

It showed up, daß with this training groß e bulk material quantities braked on the percussion device meet, small bulk material quantities against it, so da&szlig without brakes; also these with high accuracy linear by the platform balancing cell erfaß t become.

Further details of the invention can be inferred from the Unteransprüchen.

On the design Auführungsbeispiele of the invention are represented, show:

Fig. 1

a profile by the Meß mechanism;

Fig. 2

a cut after the line II-II of the Fig. 1;

Fig. 3

a changed remark example;

Fig. 4

a cut after the line IV-IV of the Fig. 3.

Gemäß Fig. 1 becomes by diagonally, preferably under an angle from for instance 45° to horizontals employed supply pipe (1) bulk material (3) toward the arrow (2) delivered. The bulk material (3) falls into a recess (4) of the supply pipe (1) and settles there as pad for the Schüttgutstrom. At the supply pipe (1) an intake pipe (5) is right-angled fastened, which the Schüttgutstrom in the overflow procedure of the bulk material pad into the percussion pipe (6) steers. The percussion pipe (6) is vertically aligned arranged with its part (of 6a) and runs out at its lower end (of 6b) curved. The curvature is so groß , daß the Schüttgutstrom in the free case always on the curved end (6b) of the percussion pipe (6) meets. The entire percussion mechanism is by a pipe (9) surrounded, which with the supply pipe (1) and the intake pipe (5) is firmly connected.

The bulk material (3) meets along the lower Mantellinie M1-M1 of the intake pipe (5) toward the arrow (8) against the wall part (of 6a) of the percussion pipe (6). The percussion pipe (6) is with the Wägezelle of of a stationary Plattformwaage (10) connected by two pins (16). The housing of the Plattformwaage (10) is firm over a gusset (17) connected with the pipe (9). By the impact of the bulk material on the wall part (6a) of the percussion pipe (6) this emigrates toward the arrow (11) in horizontal direction around a small amount. The emigration becomes from the platform balancing cell of the Plattformwaage (10) independently of the place of the Aufpralles of the bulk material grains on the wall of the percussion pipe erfaß t. From this the bulk material falls toward the arrow (12) by the vertical part (6a) of the percussion pipe (6) downward and meets here on the bent, that heiß t curved running final part (6b) of the percussion pipe (6).

Bending or curvature is in such a manner trained, daß the hitting thing bulk material the emigration of the percussion pipe (6) strengthened toward the arrow (11).

By the double application of force of the Schüttgutstromes on the percussion pipe (6) caused, one receives an almost linear deflection of the pipe as a function of the usually going through bulk material quantities.

Plattformwaagen gemäß the invention exhibit stretch panels, which are very sensitive, that heiß t already on very small avoiding of the percussion pipe respond (6). So that the Schüttgutstrom hits not too violently the percussion pipe, he is braked by brake mechanisms in his run speed.

For the braking of the Schüttgutstromes is in the supply pipe (1) a screen (14) intended (see also Fig. 2), which brakes the flow velocity of the Schüttgutstromes. The Schüttgutstrom meets behind the screen a recess (4), in which itself a bulk material pad (3) when further brake means deposits. Only then if the bulk material pad so groß is daß it the overflow (7) the junction point of the pipe (1) with the pipe (5), rieselt it overflows in the pipe (5) toward the arrow (8) into the percussion pipe (6). The upper edge (19) of the percussion pipe (6) is for this in the direction of the intake pipe (5) bent. The supply pipe (1) is employed under an angle from for instance 45° to the vertical one. The intake pipe (5) and the supply pipe (1) form for instance a right angle, so daß the bulk material on the percussion pipe (6) in a diagonal direction of for instance 45° meets.

By the double braking, that heiß t on the one hand by the screen (14) and on the other hand by the bulk material pad (3) one receives a very exact linear deflection of the pipe (6), independently of the kind of the passing property and independently of the going through bulk material quantities.

With very small going through bulk material quantities the braking can affect however unfavorably the linearity of the deflection of the Wägezelle. In order the linearity as a function of the going through bulk material quantity in further training of the invention for the run of very small quantities of bulk material along the Mantellinie mm of the supply pipe (1) to improve, is in the supply pipe (1) gemäß the Fig. 3 and 4 the screen (14) into two screen parts (20 and 21) divided, so daß the incoming bulk material on the one hand into the range of its lower Mantellinie mm is forced to travel through on the other hand unhindered and the openings between the screen parts (20, 21) can.

Small bulk material quantities become by the screen parts (20, 21) into the range of the lower Mantellinie mm of the supply pipe (1) forced. This Schüttgutstrom meets a narrow slant (15), which the Schüttgutstrom directly into the intake pipe (5) steers, thus not at the bulk material pad (3) arrive läß t, so daß small bulk material quantities without braking by a screen and/or the bulk material pad on the percussion pipe (6) meet.

In place of the slant (15) can gemäß Fig. 3 in the Schüttgutstrom a plate (25) intended its, which with an end (26) to the supply pipe (1) is fastened and whose other end (27) diagonally downward toward the Mantellinie M1-M1 of the intake pipe (5) is bent.

On this plate or on the slant (15) the bulk material runs with small bulk material quantities, without meeting the bulk material buffer, on the plate cleanly against the wall part (6a) of the percussion pipe (6) and then a second time meets the curved end of this pipe.

It showed up, daß the available Meß device with groß it accuracy the going through Schüttgutstrom of the percussion pipe (6) erfaß t, in linear dependence on the going through bulk material quantity, furthermore in addition, independently of the kind of the bulk material and, even if the going through bulk material quantity is very small.

1

Supply pipe

2

Arrow

3

Bulk material

4

Recess

5

Intake pipe

6

Percussion pipe

6a

perpendicular part of the percussion pipe (6)

6b

lower end of the percussion pipe (6)

7

Overflow

8

Arrow

9

Pipe sheath

10

Plattformwaage

11

Arrow

12

Arrow

13

Einlaß opening for the percussion pipe (6)

14

Screen

15

Slant

16

Pins

17

Gusset

19

upper edge

20

Screen part

21

Screen part

22

Durchlaß opening

25

Plate

26

an end of the plate (25)

27

other end of the plate (25)

Mm

Mantellinie of the supply pipe (1)

M1-M1

Mantellinie of the intake pipe (5)