SU899158A1

SU899158A1 - Screen

Info

Publication number: SU899158A1
Application number: SU802921098A
Authority: SU
Inventors: Вячеслав Матусович Берлин; Григорий Илларионович Никитин; Адольф Матусович Берлин; Иван Алексеевич Гурин
Original assignee: Государственный проектно-конструкторский институт "Гипромашуглеобогащение"
Priority date: 1980-05-07
Filing date: 1980-05-07
Publication date: 1982-01-23

Description

Изобретение относится к технике разделения сыпучих материалов по крупности и может быть использовано в горнорудной, угольной промышленностях, в промышленности строительных материалов. ⁵ The invention relates to techniques for the separation of bulk materials by size and can be used in the mining, coal industries, in the building materials industry. ⁵

Известен грохот вибрационный, содержащий короб, закрепленное в нем жестко одной стороной эластичное сито, а другой - через упругие элемента, позволяющие ситу дополнительно ссг¹⁰вершать колебания (1J ,Known rumble vibrating containing box, it is rigidly fixed in one side of the elastic sieve, and the other - through a resilient element allowing further sieve ccr ¹⁰ completes the oscillations (1J,

Недостатком такого грохота является то, что конструкция имеет жесткий массивный колебающий короб, а закрепленное в нем сито склонно к за- ¹⁵биванию просеивающих ячеек кусками породы, что снижает эффективность и производительность грохота.The disadvantage of this screen is that the design has a massive hard fluctuate box, and enshrined in the strainer it tends to za- ¹⁵ bivaniyu screening cells pieces of rock, which reduces the efficiency and performance of screening.

Наиболее близким к изобретению по технической сущности является гро- ²⁰хот, содержащий станину и эластичное сито, отдельные участки которого закреплены на установленных параллельно друг другу опорах. Опоры эластичного сита находятся на трубах, шарнирно связанных со станиной. На концах опорных труб имеются поводковые рычаги, которые поочередно соединены с двумя качающимися в противоположных направлен ниях шатунами привода.Процесс разделения материала по крупности осуществляется за счет периодических волновых движений эластичного сита t23.The closest to the invention by the technical essence is gro- ²⁰ although comprising a frame and flexible mesh, the individual portions of which are fixed to each other supports arranged in parallel. The supports of the elastic sieve are located on pipes pivotally connected to the bed. At the ends of the support pipes there are drive levers, which are alternately connected to two drive rods swinging in opposite directions. The process of separation of material by size is carried out due to periodic wave movements of the elastic sieve t23.

Недостатком известного устройства является сложность конструкции, выразившаяся в наличии большого количества шарнирно связанных элементов (опорные трубы, поводковые рычаги, шатуны) .A disadvantage of the known device is the design complexity, expressed in the presence of a large number of articulated components (support pipes, pull arms, connecting rods).

Цель изобретения - упрощение конструкции.The purpose of the invention is to simplify the design.

Поставленная цель достигается тем, что просеивающая поверхность выполнена в виде рукава с эллиптическим по перечным сечением, сформиррванным жесткими элементами , один конец которого неподвижно’закреплен на опорнойThis goal is achieved by the fact that the screening surface is made in the form of a sleeve with an elliptical cross-section, formed by rigid elements, one end of which is fixedly fixed on the supporting

899158 4 раме, а другой соединен с эксцентриковым приводом.899158 4 frames, and the other is connected to an eccentric drive.

Кроме того, просеивающая поверхность выполнена с возможностью поворота вокруг продольной оси на 180°. j Ла фиг. 1 изображено устройство при максимальном натяжении эластичного сита, вид сбоку; на фиг. 2 то же, при максимальном провисании сита; на фиг. 3 “ разрез А-А на фиг. 1.10 Устройство включает опорную раму 1, эластичное сито-рукав 2, на концах которого имеются жесткие поворотные обечайки 3. привод 4. жесткие элементы 5 и питающий желоб 6. Загру- 1$ зочный конец эластичного сита неподвижно закреплен на опорной раме 1, а другой конец связан через обечайку с приводом. Эластичному ситу задают эллиптическую форму поперечного се- J0 чения с помощью жестких элементов 5Грохот работает следующим образом. При вращении эксцентрикового вала привода 4 концу эластичного ситарукава 2 через связанную с приводом . 25 обечайку 3 сообщаются круговые колебания. Эластичный рукав при этом подвергается циклическим упругим деформациям изгиба и растяжения .переходя поочередно из состояния провисания в состояние натяжения. Под воздействием колебаний эластичного рукава поступающий в него через питающий желоб 6 сыпучий материал перемещается к разгрузочному концу грохота. _иПри движении материала происходит отсев его мелких фракций через ячейки сита. Постоянная упругая деформация сита, сопровождающаяся значительными по величине ускорениями, способствует разрыхлению материала и очистке ячеек сита от налипающих частиц. А выполнение сита в виде эластичного перфорированного рукава с эллиптическим поперечным сечением значительно интенсДфмцирует разрыхление материала и повышает эффективность процесса грохочения, так как при столкновении скачкообразно движущегося материала с верхней оболочкой рукава происходит разрушение слипшихся комков материала и частичный отсев его мелких фракций.In addition, the screening surface is rotatable around the longitudinal axis by 180 °. j La FIG. 1 shows a device with a maximum tension of an elastic sieve, side view; in FIG. 2 the same, with maximum sagging of the sieve; in FIG. 3 “section AA in FIG. 1.10 The device includes a support frame 1, an elastic strainer sleeve 2, at the ends of which there are rigid swivel shells 3. a drive 4. rigid elements 5 and a feed chute 6. The loading end of the elastic sieve is fixedly mounted on the support frame 1, and the other the end is connected through the shell to the drive. The elastic situation is given an elliptical cross-sectional shape J0 using rigid elements 5 The screen works as follows. When the eccentric shaft of the actuator 4 rotates, the end of the elastic sitarukawa 2 through the associated with the actuator. 25 casing 3 reported circular oscillations. In this case, the elastic sleeve undergoes cyclic elastic deformations of bending and tension. Transitioning from the sagging state to the tension state in turn. Under the influence of vibrations of the elastic sleeve, the bulk material entering it through the supply chute 6 moves to the discharge end of the screen. _and When the material moves, its fine fractions are sifted out through the sieve cells. Permanent elastic deformation of the sieve, accompanied by significant accelerations, contributes to loosening of the material and cleaning the sieve cells from adhering particles. And the implementation of the sieve in the form of an elastic perforated sleeve with an elliptical cross-section significantly intensifies the loosening of the material and increases the efficiency of the screening process, since when a shock-like moving material collides with the upper shell of the sleeve, the sticky lumps of the material are destroyed and its fine fractions are partially screened out.

Для обеспечения равномерного износа поверхности сита и самоочистки его ячеек от застрявших клиновидных зерен материала сито-рукав предлагаемого грохота выполнено с возможностью поворота его с помощью_ поворотных обечаек 3 на 180° вокруг продольной оси. При .этом нижняя оболочка рукава становится верхней, а верхняя - нижней.To ensure uniform wear of the sieve surface and self-cleaning of its cells from stuck wedge-shaped grains of material, the sieve-sleeve of the proposed screen is made with the possibility of rotation using 180 rotary shells 180 ° around the longitudinal axis. With this, the lower shell of the sleeve becomes upper, and the upper - lower.

Такое исполнение грохота позволяет значительно упростить его конструкцию и повысить эффективность и производительность грохочения за счет интенсификации разрыхления материала, самоочистки ячеек сита и отсева мелких фракций материале как при его движении вниз, так и при движении вверх. Экономия от внедрения грохота может.быть получена за счет снижения стоимости грохота и повышения его производительности.This design of the screen makes it possible to significantly simplify its design and increase the efficiency and productivity of screening due to the intensification of loosening of the material, self-cleaning of the sieve cells and screening of small fractions of the material when moving down and when moving up. The savings from the introduction of the screen can be obtained by reducing the cost of the screen and increasing its productivity.

Claims

The invention relates to a technique for the separation of bulk materials by the edge and can be used in the mining and coal industries, in the industry of building materials. A vibrating screen is known, which contains a duct, a flexible sieve fixed in it rigidly by one side and the other through Tbf elastic elements, which allow the sieve to additionally perform oscillations tU. The disadvantage of such a rumble is that the structure has a rigid massive oscillating duct, and the sieve fixed in it is prone to beating the sifting cells with pieces of rock, which reduces the efficiency and productivity of the rumble. Closest to the invention by its technical essence is a screen comprising a frame and an elastic sieve, some parts of which are fixed on supports arranged parallel to each other. The supports of the elastic screen are located on pipes hinged to the bed. At the ends of the support tubes, there are levers that are alternately connected to two drive rods swinging in opposite directions. The process of separating the material by size is carried out by periodic wave movements of the elastic sieve t2l. A disadvantage of the known device is the complexity of the design, expressing with E the presence of a large number of pivotally connected elements (support pipes, levers, connecting rods). The purpose of the invention is to simplify the design. The goal is achieved by the fact that the screening surface is made in the form of a sleeve with an elliptical cross section formed by rigid elements, one end of which is fixed to the supporting E frame, and the other is connected to an eccentric drive. In addition, the screening surface is configured to rotate around a longitudinal axis through 180 °. La fig. 1 shows a device with a maximum tension of an elastic sieve, side view, FIG. 2 the same, with a maximum sagging sieve; in fig. Fig. 3 shows the section A-A in FIG. The device includes a support frame, an elastic sieve-sleeve 2, at the ends of which there are rigid swivel arms 3, an actuator. the rigid elements 5 and the feeding chute 6. The loading end of the elastic screen is fixedly fixed to the support frame 1, and the other end is connected through the side to the drive. The elastic sieve is set to elliptical cross-sectional shape using rigid elements 5. The screen operates as follows. When the eccentric drive shaft is rotated, the end of the elastic sitarukawa 2 is connected to the drive-connected circumferential 3 by circular oscillations. In this case, the elastic sleeve is subjected to cyclic elastic deformations of bending and stretching, the transition alternately from a state of sagging to a state of tension. Under the influence of vibrations of the elastic sleeve, the bulk material flowing into it through the feed chute 6 is shifted to the discharge end of the screen. During the movement of the material occurs from the sowing of its fine fractions through the sieve cells. Permanent elastic deformation of the sieve, accompanied by significant accelerations, facilitates loosening of the material and cleaning of the sieve cells from sticking particles. And making the sieve 8 as an elastic perforated sleeve with an elliptical cross section significantly integrates loosening of the material and improves the efficiency of the screening process, as in the collision of a moving material with the upper shell of the sleeve, the sticking of lumps of material and partial elimination of its small fractions occurs. 84 In order to ensure uniform wear of the sieve surface and self-cleaning of its cells from stuck wedge-shaped grains of material, the sieve sleeve of the proposed screen is made with the ability to rotate it using rotary shells 3 by 180 around the longitudinal axis. With this, the lower sheath of the sleeve becomes the upper and the upper sheath becomes the lower. Such a screen makes it much easier to design and to increase the efficiency and productivity of screening due to the intensification of material loosening, self-cleaning of the sieve cells and screening of small fractions of the material both during its downward movement and upward movement. Saving from the introduction of the screen can be obtained by reducing the cost of the screen and increasing its performance. Claim 1. Inverter supporting frame, eccentric drive, elastic screening surface attached to the frame, characterized in that, in order to simplify the design, the screening surface is made in the form of a sleeve, one end of which is attached to the support frame and the other is connected to eccentric drive. 2. Screen according to claim 1, characterized in that, in order to increase screening efficiency, the sleeve is made elliptical in cross section and is formed by rigid elements. 3. Screen on PP. 1 and 2, that is, that the screening surface is installed with the possibility of rotation around the longitudinal axis by 180. Sources of information taken into account during the examination 1. USSR author's certificate No. 452368, cl. B 07 B 1/28, 1973,

2. The patent of the USSR W 297158, cl. in 07 1/28, 1968 (prototype).