RU1791715C - Weigher - Google Patents

Abstract

Usage: dosing of powdered wet materials into a stream of another material. SUMMARY OF THE INVENTION: the metered material is rotated by a horizontal screw through the discharge window of the hopper and enters the cylindrical housing of the distributor. The distributor is made in the form of a blade drum mounted on a horizontal axis of rotation with an offset relative to the screw. By the blades of the drum, the material is cut off and evenly distributed into the flow of another material, exit through the socket of the cylindrical body down. 2 ill.

Description

The invention relates to devices for dispensing powdered materials of normal as well as high humidity and can be used in agriculture, construction and other industries.

A device is known for volumetric dosing of bulk materials, including a conical hopper, auger, agitator and drive mechanism. The disadvantage of this device is that when working with materials of high humidity, dosing is not uniform.

A batch screw paste dispenser for pasty materials is known, comprising a hopper, a screw, a bypass channel and a diaphragm with holes. This device is intended for batchwise dosing of pasty materials and uniform continuous unloading on it is impossible to obtain.

Also known is a screw dispenser comprising a hopper, a screw and a perforated diaphragm. The disadvantage of this dispenser is that it is designed to dispense bulk materials, and when working with wet products, the dispensing becomes uneven.

Closest to the technical nature of the invention is a dispenser comprising a hopper, auger, agitator and drive mechanism. The disadvantage of this dispenser is also that when working with moistened material it is not ensured that it is uniform, unloading, as it is sealed by turns. The screw and pieces fall from the unloading window.

The purpose of the invention is to increase efficiency due to the possibility of using, when dosing, wet material in a stream of another material.

The goal is achieved by the fact that in the dispenser containing installed in the hopper with a cart (L

G

vj o

SL

with the possibility of rotation a horizontal screw, the output end of which is coaxially placed in the discharge window, a distributor is introduced, made in the form of a blade drum mounted along the axis of rotation in a cylindrical casing, the outlet pipe of which is made in the form of a socket in the side wall of the casing, the input window of which made on its end wall eccentrically with an offset toward the bell, the axis of rotation of the blade drum is installed in a horizontal plane and offset horizontally relative to the screw, the housing is installed rubom vniz.ego input window aligned with the window unloading hopper, and the geometric parameters are selected from ratios:

Vl

2 lgRm ctg a (Ohm

TO

(Ohr

Re Ro + L,

where Re is the radius of the paddle drum;

RO is the radius of the hopper discharge window;

L is the distance between the axis of the screw and the axis of rotation of the blade drum;

Vl-width of the blade ;;

RUJ is the radius of the screw;

0) m

-rr- - ratio of given angular

Fr.

screw and distributor speeds; a is the angle of inclination of the screws of the screw;

K is the number of blades.

Figure 1 shows the proposed dispenser, General view; figure 2 is a section aa in figure 1.

The dispenser includes a horizontal 2 mounted in the hopper 1 rotatably, behind the output end of which a distributor is installed, consisting of a cylindrical housing 3 with an outlet pipe 4 made in the form of a bell in the side wall of the housing and the blade drum 5, the axis of rotation 6 of which is installed in a horizontal plane and is offset horizontally relative to the axis of the screw.

The dispenser works as follows. The material from the hopper 1 is fed by the screw 2 to the discharge window 7. During the movement, the material having high humidity is compacted and fed for unloading by lumps of random shapes and sizes. With internal bonding, lumps of material are held at the edge of the discharge window 7 beyond. The pattern of breaking off lumps from the total flow is random in time and size. To improve the quality of dosing at the outlet of the discharge window 7, the material is affected by the blades of the drum 1, which, when the drum rotates, breaks up the sticky mass exiting the discharge

windows 7, and evenly scatter it on the surface of the material 8 moving on the conveyor 9.

The rotational speed of the distributor vane drum is determined as follows

way.

The speed of movement of the material by the screw is according to the formula

fifteen

VM U.S. ctg a (о Рш ctg - a (1)

where VM is the material velocity; U.S. - linear screw speed; a - the angle of inclination of the turns of the screw; Odi - angular velocity of the screw; rsh is the radius of the screw.

During the time t of rotation of the distributor drum by the angle between the blades, the material supply will be;

25

l Vmt O) w-Ruj Ctg a t, (2)

where I is the distance over which the material will move in time t;

t is the time of rotation of the distributor drum by the angle between the blades.

From the condition of the need for active action of the blades on the entire flow, we determine:

 Rn pcs Rm ctg a

where In l - the width of the blades. In view of (3) we will have:

u

"P - to. T.

(3)

AND)

where litter is the rotational speed of the distributor drum;

K is the number of blades. From (4) it follows:

50 t

(5)

Comparing (3) and (5), we obtain the relation:

2 l

Vl

Ur K, Rm Ctg "

From (6) it follows:

(6)

Vl

2 Rm ctg

) p The radius of the blade drum is determined by the need for active action of the blades on the entire flow of material exiting the discharge window and a comparison of the geometric parameters shown in Fig. 2:

Re Ro + L,

where RO is the radius of the hopper discharge window;

L is the distance between the axis of the screw and the axis of rotation of the vane drum.

Thanks to the design of the outlet pipe of the distributor in the form of a bell, it is possible to introduce high humidity material over the entire width of the moving stream of another material, regardless of the width of this stream. By changing the height of the dispenser relative to conveyor 9, we thereby obtain different widths of the distribution zone of the material introduced by the dispenser. The higher the dispenser is installed above the conveyor, the wider the material distribution zone will be.

The length of the blades of the drum is made larger than the diameter of the discharge window in order to be able to act on all elements of the flow of the dosed material, regardless of at what point in the discharge window the particle exit of the material.

The proposed dispenser, due to the presence of a dispenser, is able to more evenly distribute material with increased humidity compared to the dispenser taken as a prototype. The proposed dispenser can also be used to add mineral additives to the feed mixture. It is known that due to the feeding of mineral supplements to animals in optimal doses, the weight gain of young animals is increased by 12 ... 20%, milk yield by 8 ... 12%. If the application rate deviates from the optimum in a smaller direction, the effect will be less significant or completely invisible, and to a greater extent, poisoning of animals is possible. Therefore, it is very important to maintain a given application rate. A substantial dispenser is not able to provide an accurate application rate (for the above reasons) and does not preclude the possibility. poisoning

animals. The proposed dispenser almost completely solves this problem and thereby contributes to increasing the productivity of animals without the risk of poisoning.

Claims (1)

The claims A dispenser comprising a horizontal auger installed in the hopper with the possibility of rotation, the output end of which is coaxially placed in the unloading window, which, in order to increase efficiency due to the possibility of using a damp material when dosing, introduces another material into the flow a distributor made in the form of a vane drum mounted along the axis of rotation in a cylindrical housing, the outlet pipe of which is made in the form of a socket in the side wall of the housing, the input window of which is made on his the end wall is eccentric with an offset towards the socket, the axis of rotation of the blade drum is installed in the horizontal plane and is displaced horizontally relative to the screw, and the housing is installed bell down, its input window is combined with the discharge window of the hopper, and the geometric parameters are selected from the relations Vl 2 pt ctg a TO (From 0) p R6 RdH where Re is the radius of the paddle drum; RO - hopper window discharge radius; I is the distance between the axis of the screw and the axis of rotation of the blade drum; RUJ is the radius of the screw; $ t 7-7- the ratio of the given angular velocities of the screw and distributor; a is the angle of inclination of the turns of the screw; K-number of blades; Vl - the width of the blades. Editor Figure 2. Compiled by N. Tishaninov Tehred M. Morgenthal Corrector M. Keretsman