SU1767345A1 - Loose material metering device - Google Patents

Abstract

Use: for the abrasive and chemical industries for dispensing abrasives and powders. SUMMARY OF THE INVENTION: Stagnant zones in housing 1 and exit slit channel 2 are eliminated, and the dose dispensing process is also quickly interrupted by making the bottom of the housing 1 pyramidal with the first wall 4 located to the side wall of the housing 1 at an angle of less than 90 ° on the angle of repose and on the second, opposite to it curved wall 5, one part of which intersects the side wall of the housing at an angle less than 90 ° at the angle of repose and the friend is parallel to the first wall 4 with a slit-like output channel 2 formed between them, and in addition, by installing the housing 1 on its axis of rotation, aligned with the bend line of the second wall 5 of the bottom. 2 Il.

Description

A. FIG. {

The invention relates to the construction industry, specifically to the dosing of non-coherent crystalline substances.

Known Throttle valve (US patent No. 4228822, CL 138/46 (D 03 D) 39/20 from 11.09.78), having a conical shape on top of the saddle and parabolic - below the saddle. The angle of inclination of the base of the cone and the angle of inclination of the tangent to the parabolic part at the point of transition from the parabola to the cone corresponds to the angle of repose of the dosed substance. This, according to the authors of the patent, predetermines a uniform, without arching, the outflow of a substance during the dosing process.

This device has some drawbacks. For example, the surfaces of the valve and seat are subject to intense wear when dispensing substances. When the valve is lowered, it is inevitable that the saddle will pinch the crystals between it. This will lead to cracking of the crystals, violation of the particle size distribution and aggravate the wear of the device elements. But the main thing is that the valve does not make it possible to accurately measure the dose of the outflow of a substance.

An hourglass is also known (GOST 10576-74). Both containers and the capillary between them have a common longitudinal axis and are connected to each other by means of cones. The generators of the latter are completed taking into account the angle of repose of quartz sand. The capillary here is essentially a metering device. In the vertical position of the axis of the instrument, sand passes through it, and to stop the flow, the longitudinal axis of the instrument is sufficiently horizontal.

The main disadvantages of an hourglass as a dispenser are: a cylindrical section of the capillary: its vertical position in the working state and the coincidence of the longitudinal axis of the capillary with the longitudinal axis of the containers. These disadvantages predetermine a high, up to 2–3% error in dosing.

As a prototype, a device for dispensing granular material is adopted (UK Patent No. 1288624.cl. G 01 F 11/26. 1972). It is a container of rectangular, triangular or circular cross section. A distributing chamber is separated inside the container, bounded by two lateral and one upper walls of the container. The lower part of the dispensing chamber is bounded by two internal walls. One of them is formed by the Inner Capacity of the Friend's Cap, bent inward — by a visor mounted on the top wall of the Capacity. a slit-like opening is obtained for the passage of the dosage material from the container to the dispensing chamber.

0 Dosing occurs when the device is rotated about an arbitrary axis parallel to the slit-like opening of the dispensing chamber.

The obvious advantage of the prototype - from 5 to the simplicity and reliability of the design,

A major disadvantage of the prototype is the inconvenience of the position of the axis of rotation of the device during the dosing process. it

0 causes a large dosing error.

The aim of the invention is to improve the accuracy of dosing.

The goal is achieved by the fact that

5 walls of the pyramidal bottom of the dispenser are inclined to the horizon at an angle of repose. One of the walls is straight, the other is bent and so that between them a slit-like channel is formed for the passage of the dispensed substance, and the axis of rotation of the dispenser is fixed. In this case, the bending line of the wall of the sipe channel is aligned with the axis of rotation of the dispenser on the bracket. A significant difference is the slope of the walls with

5 taking into account the angle of repose and the coincidence of the bend of the channel wall with the axis of rotation. FIG. 1 shows a schematic of the proposed dispenser: in FIG. 2 is a section A-A in FIG. one.

0 The proposed metering device consists of a ring 1 mounted on a rotating bracket 2. A container 3 with a substance to be dosed is installed in the ring. It has a pyramidal bottom 4 and a gap-like channel

5 5. The lower long (first) wall 6 of the channel is an extension of the bottom, and the upper (second) wall 7 and the bottom 4 form a bend line 8 aligned with the axis of rotation of the bracket 2.

0 KemTIPP dispenser works as follows.

 With the vertical position of the container, the walls of the slit-like channel are inclined to the horizon at the angle of the natural slope of the substance being metered. Therefore, the outflow of matter through the channel will be smooth, uniform, approximately the same as its movement along a cone consisting of this substance. To stop this process, the capacity is turned

bracket so that the slit channel moves upwards. At the same time, the angles of inclination of the canals are increased, which stops the outflow of the dosing substance.

It should be noted that the angle to which the bracket should be turned to turn the dispenser on or off is small. This also provides improved metering accuracy.

Claims (1)

DETAILED DESCRIPTION OF THE INVENTION A dispenser for bulk materials comprising a rotary body with a slit-like outlet channel, characterized in that, in order to improve accuracy, 0 The axis of rotation of the body is entered into it, and its bottom is made pyramidal, the first wall of which intersects the side wall of the body at an angle less than 90 ° at the angle of repose, and the second, opposite wall, is curved, and one part of it intersects the side wall of the body under an angle less than 90 ° at the angle of repose, and the other is parallel to the first wall with the formation of a slit-like output channel between them, with the housing mounted on its axis of rotation, which is aligned with the bend of the second bottom wall.