SU1755908A1 - Gravity mixer - Google Patents

Abstract

The invention relates to mechanical engineering and can be used in the processes of preparation of mixtures. It provides improved mixing quality. The gravitational mixer contains a box-shaped housing sectioned vertically. Sections include groups of working elements in the form of strips (three lanes in each). Groups in each section are set with alternating inclination in opposite directions, and the inclination angle exceeds the angle of repose. One of the extreme working bodies in each group is adjacent to the wall of the housing. The working bodies are installed with displacement in rows relative to each other and at a distance from each other vertically, not less than the width of the output slit of the hopper. At the entrance to the lower section are installed sloping boards of collecting elements. Formed by them the output slit is parallel to the lower working bodies. When the material is loaded from the bunker, multiple material is poured over the working bodies, 4 Il. with

Description

The invention relates to mechanical engineering and can be used in technological processes for the preparation of mixtures of bulk materials such as sand, ash, cement, gypsum, crushed stone, grain, flour, clay, etc.

A mixer is known that includes a vertical casing with lattices arranged in height with dividers arranged in a staggered order, guide elements and a distribution cone with oppositely directed helical blades and helical grooves.

The disadvantages of this mixer are the complexity of the device, the inability to use the entire working surface.

lattices due to the fact that an incomplete part of the material passes through the grooves of the distribution cone, the ability to sort particles by size and density due to the resulting centrifugal forces during the rotation of the material, the quality of mixing is not high enough.

A mixer for mixing bulk materials is also known, which includes a bunker, a vertical box-shaped body consisting of sections with working bodies arranged in them, made of an angular profile and collecting elements with decreasing flow sections, and the working bodies of adjacent sections are mutually perpendicular, and the sloping boards collecting element

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There are rectangular exit slots, the large axis of which is parallel to the lower working bodies.

This device is closest to the invention by its technical essence and the achieved result.

The disadvantage of this device is its complexity, high intensity, complexity of adjusting the position of the working bodies during the assembly process and during the transition to the preparation of mixtures of materials with other characteristics (size, density, angle of inclination into motion, humidity, etc.).

The aim of the invention is to improve the quality of mixing.

The mixer is shown schematically in figure 1 - the main view; FIG. 2 is a section A-A in FIG. on fig.Z - type BB in figure 1; 4 shows the mixing process in one section.

The mixer includes a hopper 1. located above the two-piece vertical box-shaped body 2 offset from the symmetry axis of the body, working bodies 3, for example, from rolled strip, fixed to the body, and two pitched boards 4, 5, mounted at the entrance to the second section and forming a collecting element with an exit slot of rectangular shape, directed at an angle of 90 relative to the working bodies of the upper section. Under the exit slit of the collecting element there is a similar lower section in which the working bodies are located at an angle of 90 with respect to the working bodies of the upper section and parallel to the exit slit of the collecting element.

In each pack there are three g / gs of rows of working bodies, the length of which is equal to the length of the exit slit of both the bunker and the collecting element and are set in each row one after the other in width with a pitch ensuring the formation of slit-like openings between adjacent working bodies , the rows of each group are located relative to each other vertically with a certain step so that the working bodies of the lower position are opposite the slots above the located row, and the slope of the rows of the first (upper) group is right with the angle of inclination greater than the angle of repose of the material being mixed in motion, the second and third groups of working surfaces have respectively left and right inclines with the same angle of inclination. The working bodies of the upper row of the second and third groups are located opposite the slots above the group, and the left working organ of the second row of the first

groups, the right working member of the upper row of the second group and the left working member of the upper row of the third group closely adjoin the mixer body.

The mixer works as follows.

Into the hopper 1, the mixture components are fed in a continuous flow, which, leaving the slot of the bunker, fall into the first section

0 body 2, and further to the upper left working body 3 of the first row of the first group of working bodies. The material rolls along the surface of the working body to the right and down and partially to the left of the working body. With

5 passing over the slots formed between adjacent working bodies, a part of the material spills down. In the upper row, the material is divided into six equal flows {figure 4}: four (b, c, d, e) are formed

0 with the passage of material through the slits, the fifth (e) - behind the edge of the lower working body, the sixth (a) - to the left of the upper working body,

Thus, the top row of workers

5 bodies divides the total material flow into streams with smaller cross sections of length equal to the length of the exit slit of the hopper. Formed flows fall on working bodies of the second row and material

0 rolls over them to the right and even. At the same time, a part of the material of the flow of am pushes into the slot along the way, and a part continues to move along the inclined surface and is encountered on the second working organ.

5 with flow b, as a result of which they are mixed, since their velocity vectors are directed relative to each other at an angle. At the flow, the direction is to the right and downwards, and at the flow b - vertically downwards. 060 the flowed ab flow moves to the right along the inclined surface, and when it reaches the gap, it wakes up partially downwards, and the rest goes to the third working body, where it meets with the flow in and re-interferes - the flow flows out to the right and downwards and part of it wakes up through the slit, and part goes to the next 4th working body, where it meets the flow r and mixes — an abwg flow forms, which in turn moves along an inclined surface, and, reaching the slit, partially osypaets down, and some falls on the 5th working

5, the organ where it mixes with the flow g is the flow of abwgd, which, moving on an inclined surface, rolls down and meets with the flow e of the last working organ of the upper row, the flow is formed abvgde.

The following occurs on the third row of organs.

On the first working organ, a part of the flow of material falls, which rolls down its inclined surface, shifting to the right and down. When the gap is reached, a part of the material wakes up, a part goes to the second working organ, where it mixes with the flow ab - a Stream is formed (2a) b. The flow (2a) b moves along the inclined surface, the income reaches the slot, partially wakes up through it, partially moves to the 3rd working body, where it meets with the flow abv - the flow (For) (2b) c is formed. The flow (For) (2b) in passes through the inclined surface, the income to the slit partially wakes up and then gets to the 4th working body, where it meets with the flow of abvg - a flow (4a) (ZbH2c) g is formed and then when rolling off its working surface is mixed with a flow of abvgde - there is a flow (5X4bHZvH2g) de.

When the material gets into the second group of rows of working bodies, a similar separation and mixing of the parts of the flows occurs, but all of them roll down the surfaces inclined to the left. When the flow (5eX4b) (Sv) (2g) de moves along the inclined surface of the first row, the material flows out of the slits of the lower row of the upper gully into it, and they are mixed and further divided into new streams through the slits of this row . Further, the mixing process is similar to the mixing process in the first group of rows.

In the third group of rows of working bodies, similar processes occur, but as the material moves along inclined working surfaces to the right and down.

In the lower part of the first section, the material is collected by pitched planks 4 and 5 into a stream of rectangular cross section, the long side of which is perpendicular to the above working bodies and parallel to the below working bodies of the second section of the mixer. The outflow from the slot of the collecting element goes to the working bodies and the mixing process is similar to the process in the first section, but. the material flows are mixed in a plane perpendicular to the first. The finished product is poured from the bottom of the second section.

The location of one of the working bodies of each group close to the mixer body prevents material spilling between these working bodies and the body and passing them down without mixing.

In this mixer, flows are divided into a larger number of narrow flows and their connection is compared with the prototype, which allows achieving high quality mixing.

Claims (1)

Invention Formula A gravitational mixer containing a bunker, a box-shaped housing sectioned vertically under it, the sections of which include groups of working elements, three rows in each, forming slit-like openings, displaced in rows relative to each other and arranged in adjacent sections mutually perpendicular, at the entrance to the second section, the pitched boards of collecting elements, forming a rectangular "entrance slit, oriented parallel to the underlying working bodies and having the same length with the latter Line, characterized in that, in order to improve the quality of mixing, the working bodies are made in the form of bands installed in each group with a pitch larger than the width of the working body, the rows in each group are placed vertically at a distance from each other not less than the width the output slit of the bunker, the groups in each section are set with alternating inclination in opposite directions, and the angle of inclination exceeds the angle of repose, while the working bodies of the upper row of the second and underlying groups are located opposite the slots of the lower row above lying group, and one of the extreme working bodies in each group is adjacent to the housing walls. Aa V vCf " J -. " sss c # % x to Fie.2 ff-ff -one e-.1 ... : ir-c - .. Ss .- ::. . with ---- - ( -. ". ..- .. ..-: “s &. F-- .. - Yomgs $ &. .-. ABOUT . . ;;;. .. . .. SabSJefede - G: -.Ъ   : :. - L