SU961778A1

SU961778A1 - Screen

Info

Publication number: SU961778A1
Application number: SU802940720A
Authority: SU
Inventors: Николай Григорьевич Картавый; Виктор Алексеевич Зубков; Всеволод Михайлович Осецкий; Георгий Александрович Доброборский; Игорь Федорович Щербаков; Юрий Николаевич Алешин; Анатолий Данилович Бардовский; Владимир Дмитрович Мошников; Юрий Алексеевич Буряков; Вячеслав Иванович Веселов
Original assignee: Московский Ордена Трудового Красного Знамени Горный Институт
Priority date: 1980-06-13
Filing date: 1980-06-13
Publication date: 1982-09-30

Description

1one

Изобретение относитс к технике классификации по крупности дробленых материалов на карьерах и может быть использовано в горно-обогатительной промышленности , промышленности строительных материалов и др.The invention relates to a grading technique for the size of crushed materials in quarries and can be used in the mining and processing industry, the building materials industry, etc.

Известны грохоты, просеивающа поверхность которых выполнена из изогнутой по дуге колосниковой решетки либо сетки I .Screens are known, the screening surface of which is made of an arc grate bent along an arc or a grid I.

Наиболее близким к предлагаемому по технической сушности вл етс грохот, содержаш,ий корпус, загрузочную воронку, дуговое сито, установленное наклонно, и течки дл надрешетного и подрешетного продуктов The closest to that proposed by technical dryness is a screen, containing a body, a feed hopper, an inclined set of arc sieves, and chutes for oversize and undersize products.

Недостатком указанного сита вл етс то, что при неизменном исходном материале гранулометрический состав подрешетного продукта определ етс только положением жестко закрепленного в корпусе дугового сита. Дл изменени крупности отдел емого продукта необходима замена сита, что уменьшает производительность грохочени из-за дополнительных трудозатрат на переустановку сита.The disadvantage of this screen is that, with a constant raw material, the granulometric composition of the sublattice product is determined only by the position of the arc screen that is rigidly fixed in the body. To change the size of the product being separated, a sieve must be replaced, which reduces the screening capacity due to the additional effort required to reinstall the sieve.

Цель изобретени - повышение производительности грохочени путем регулировани гранулометрического состава подрешетного продукта.The purpose of the invention is to increase the productivity of screening by adjusting the granulometric composition of the sublattice product.

Указанна цель достигаетс тем, что корпус выполнен с дуговыми пазами, в которых установлена нижн часть сита с возможностью перемещени в вертикальной плоскости, при этом верхн часть сита закреплена в корпусе шарнирно.This goal is achieved by the fact that the casing is made with arc grooves in which the lower part of the sieve is mounted so as to move in a vertical plane, while the upper part of the sieve is hinged in the casing.

Сито снабжено заслонкой, шарнирно закрепленной в его нижней части.The sieve is equipped with a flap hinged at its bottom.

На фиг. 1 показана конструктивна схема предлагаемого -грохота, вид сбоку; на фиг. 2 - вид по стрелке А на фиг. 1.FIG. 1 shows a structural diagram of the proposed -gun, side view; in fig. 2 is a view along arrow A in FIG. one.

Claims

The screen consists of a body 1, to which 15 a feed funnel 2, an arc screen 3, an estrus 4 for an oversize product are attached. The upper part of the sieve is attached to the body on the hinge 5. The lower part of the sieve is made in the form of a rod 6, the ends of which can move in the arc guide grooves 7, cut in the side walls of the screen, the center of curvature of the grooves coincides with the axis of rotation of the hinge 5, At the ends the rod is threaded to fix the sieve in a certain position with the help of nuts 8. A damper 9 is hinged to the rod 6. The screen operates as follows. The source material through the feed funnel 2 is fed to the sieve 3, divided into the sub-mesh and the sub-mesh products. The nesting product moves further over the valve 9 to the heat 4 (position B). The leak for the undersize product is the rear wall of the housing. If it is necessary to change the granulometric composition of the undersize product, the sieve together with the chute 4 of the oversize product and the flap 9 rotates to position C. In connection with the increase in the steepness of the screening surface of the sieve, the movement speed of the material being screened decreases, and the horizontal projection of the sieve light surface decreases, resulting to reduce the maximum size of the screened particles and, consequently, to reduce the percentage of large particles in the sub-bed product. In the lower part of the screen, which has the smallest inclination of the screening surface to the horizontal, which causes the minimum speed of the screened material, the largest particles fall through. Therefore, if a further decrease in the percentage of large particles in the undersize product is required, the rotary valve 9 is rotated from the position "above the drain to the position" above the sieve, overlapping the bottom NIIT section of the sieve. Installing an arc screen with possible change, its vertical position will allow adjusting the size of the screened product, not replacing the screen, which, in turn, will allow to avoid additional labor costs for re-installing the screen, and thus increase screening performance. The use of a rotary hinged damper will increase the range of adjustment of the particle size distribution of the undersize product. Claim 1. The screen, comprising a body, a feed funnel, an arc screen, set obliquely, and chutes for the grating and undersize products, characterized in that the body is made with arc grooves to increase the screening power, by adjusting the particle size distribution of the grates, in which the lower part of the sieve is mounted so as to be movable in a vertical plane, wherein the upper part of the sieve is hinged in the body. 2. A screen according to claim 1, characterized in that the sieve is provided with a flap hinged at its bottom. Sources of information taken into account during the examination 1. Silienok F. G. Mechanical equipment of enterprises of the construction industry. M., stroiizdat, 1973, p. 80

2. Ossetsky VM and others. Mechanics of arc screens. - “Lime universities, 1977, No. 11, p. 102

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