SU880513A1

SU880513A1 - Screen sieve

Info

Publication number: SU880513A1
Application number: SU802864349A
Authority: SU
Inventors: Аркадий Владимирович Поляков; Лев Петрович Степанов
Original assignee: Всесоюзный Научно-Исследовательский Институт Строительного И Дорожного Машиностроения (Вниистройдормаш)
Priority date: 1980-01-04
Filing date: 1980-01-04
Publication date: 1981-11-15

Description

Изобретение относится к технике разделения сыпучих материалов по крупности и может быть использовано в вибрационных грохотах, преимущественно в многоярусных с кассетным креплением сит.The invention relates to a technique for separating bulk materials by size and can be used in vibrating screens, mainly in multi-tiered sieves with cassette fastening.

Известен грохот, в котором короб с закрепленными на нем вибратором и упругими ⁵опорами выполнен отдельно, и к нему прикрепляются несколько каркасов, каждый из которых снабжен ситом [1].A crash is known in which a box with a vibrator fixed and elastic ⁵ supports is made separately, and several frames are attached to it, each of which is equipped with a sieve [1].

Каждый ярус сит многоярусных грохотов должен иметь по условиям вибрации жесткие ,₀поперечины или каркас, что связано с повышенной металлоемкостью, громоздкостью конструкции и ограниченностью доступа к просеивающим поверхностям.Each tier sieves multilevel screens should have on vibration conditions harsh, ₀ or a frame cross member, which is associated with an increased metal consumption, cumbersome design and limited access to the screening surface.

Наиболее близким к предлагаемому пр технической сущности и достигаемому эф- 15 фекту является сито грохота, содержащее каркас с поперечными балками, продольные опоры, расположенные друг над другом сетки и натяжные стержни с крепежными элементами и профильными планками.The closest to the proposed technical essence and the achieved effect is a screen sieve containing a frame with transverse beams, longitudinal supports located above each other nets and tension rods with fasteners and profile strips.

Натяжка сеток ведется с помощью раз-²⁰двоенных клиньев, расположенных на внешних сторонах короба, вытягиванием стержней, соединенных с профильными планками, которые через окантовку передают усилие поперечной растяжки на сетку [2].The nets are tensioned using split ²⁰ wedges located on the outer sides of the box by pulling rods connected to the profile strips, which, through the edging, transmit the force of the transverse stretching to the mesh [2].

К недостаткам этого устройства можно отнести сложность конструкции, громоздкость и повышенную металлоемкость, вызванные наличием двух рядов поперечных связей и расположением с двух сторон сетки натяжных устройств. Применение такого устройства в виде кассеты нерационально. Необходимые для прижатия к опорным планкам поперечные выпуклости сеток создают неравномерный по высоте слой материала на ярусах, что ведет к снижению эффективности грохочения, особенно при разделении мелких фракций.The disadvantages of this device include the complexity of the design, cumbersome and increased metal consumption caused by the presence of two rows of transverse connections and the location on both sides of the grid tensioning devices. The use of such a device in the form of a cartridge is irrational. The transverse convexities of the grids necessary for pressing against the support strips create a layer of material uneven in height on tiers, which leads to a decrease in screening efficiency, especially when separating fine fractions.

Цель изобретения — упрощение конструкции и обеспечение компактности, а также повышение эффективности грохочения материала.The purpose of the invention is to simplify the design and ensure compactness, as well as improving the efficiency of screening of the material.

Эта цель достигается тем, что к одному ряду поперечных балок снизу прикреплены дополнительные продольные опоры, концы сеток жестко закреплены на каркасе, а натяжные стержни пропущены через сетки и на них установлены профильные П-образные планки, упирающиеся концами в поверхнос880513 ти сеток по обе стороны от части продольных опор.This goal is achieved by the fact that additional longitudinal supports are attached to one row of transverse beams from the bottom, the ends of the nets are rigidly fixed to the frame, and the tension rods are passed through the nets and profile U-shaped slats are installed on them, abutting the ends on the surface of 880513 nets on both sides of parts of longitudinal supports.

Сетки установлены с уклоном в поперечном сечении, направленными в противоположные стороны.The nets are installed with a slope in the cross section, directed in opposite directions.

На фиг, 1 показано сито грохота двухъярусного, общий вид; на фиг. 2 — вид А на фиг. 1; на фиг. 3 —- сечение Б-Б устройства натяжения сеток на фиг. 2.In Fig. 1, a sieve of a two-tiered screen sieve is shown, general view; in FIG. 2 is a view A in FIG. 1; in FIG. 3 —— section BB of the mesh tensioning device of FIG. 2.

Сито грохота содержит каркас с поперечными балками 1, к которым сверху и дополнительно снизу прикреплены продольные опоры 2. Сетки 3 с минимально возможным провисанием закреплены на каркасе с двух сторон с помощью дополнительных опор 4 и бортов 5. Через сетки пропущены натяжные стержни 6, на которых установлены натяжные профильные П-образные планки 7 с опорами на внешнюю сторону сеток.The sieve of the screen contains a frame with transverse beams 1, to which longitudinal supports 2 are attached above and below the bottom. The grids 3 are fastened to the frame with the minimum possible sag on both sides using additional supports 4 and sides 5. Tension rods 6 are passed through the grids, on which installed tension profile U-shaped straps 7 with supports on the outside of the nets.

Натяжение веток осуществляется при затяжке крепежных элементов 8 через упругий элемент 9, компенсирующий своей деформацией вытяжку сетки в процессе эксплуатации. Натяжение сеток происходит за счет изменения их контура, образуемого опорами 2 и 4 и натяжными профильными П-образными планками. При этом ход натяжки соизмерим с относительным удлинением контура сеток.The tension of the branches is carried out by tightening the fastening elements 8 through the elastic element 9, compensating for its deformation of the hood of the mesh during operation. The tension of the grids occurs due to a change in their contour, formed by supports 2 and 4 and tension profile U-shaped strips. In this case, the stretch of the stretch is commensurate with the relative elongation of the mesh contour.

Данная конструкция сита значительно меньше по металлоемкости и габаритным размерам в сравнении с известной конструкцией сита. Оно исключает необходимость зо второго ряда поперечных балок и уменьшает вдвое число натяжных устройств. Сито грохота компонуется в виде отдельных секций в многоярусном исполнении и обеспечивает хороший доступ к сеткам. Вследствие чередования положительных и отрицательных ³⁵углов наклона участков сеток в поперечном сечении, обеспечивается равномерное распределение материала по высоте. При незначительном перепаде высот обеспечивается повышение эффективности грохочения и равномерный износ сеток, что способствует увеличению срока их службы и снижает эксплуатационные затраты. Область приме5 нения данного сита значительно шире, поскольку оно позволяет устанавливать просеивающие поверхности неподлежащие натяжке. В этом случае натяжное устройство используется как надежное продольное крепление.This sieve design is significantly smaller in terms of metal consumption and overall dimensions in comparison with the known sieve design. It eliminates the need for a second row of transverse beams and halves the number of tensioning devices. The screen is assembled in separate sections in a multi-tiered design and provides good access to the nets. Due to the alternation of positive and negative ³⁵ angles of inclination of the grid sections in the cross section, a uniform distribution of material along the height is ensured. With a slight difference in heights, an increase in screening efficiency and uniform wear of the nets is provided, which helps to increase their service life and reduces operating costs. The area of application of this sieve is much wider, since it allows you to set the screening surfaces that are not suitable for stretching. In this case, the tensioner is used as a reliable longitudinal mount.

Claims

(54) SITTING GROUNDING The invention relates to a technique for separating bulk materials by size and can be used in vibrating screens, mainly in multi-sieve with cassette mounting. A roar is known in which a box with an inhaler and elastic supports fixed on it is made separately, and several frames are attached to it, each of which is equipped with a sieve 1. Each Russian screen of many brown screens must have rigid crossmembers or a frame that vibrates associated with increased metal consumption, cumbersome design and limited access to sifting surfaces. The closest to the proposed nq technical essence and the effect achieved is a sieve containing a frame with across GOVERNMENTAL beams, longitudinal supports disposed one above the other mesh and tensioning rods with fasteners and profiled slats. The grids are tensioned using bifurcated wedges located on the outer sides of the duct by pulling rods connected to the profile bars. which, through the edging, transmit the transverse stretching force to the mesh (2). The disadvantages of this device include the complexity of the design, bulkiness and increased metal consumption caused by the presence of two rows of cross-links and the location of tensioning devices on both sides of the grid. The use of such a device in the form of a cassette is irrational. The transverse convexities of the grids necessary for pressing to the support bars create an uneven height of the material layer on the rus, which leads to a decrease in screening efficiency, especially when separating small fractions. The purpose of the invention is to simplify the design and compactness, as well as to increase the efficiency of screening of the material. This goal is achieved by the fact that additional longitudinal supports are attached to one row of transverse beams, the ends of the grids are rigidly fixed to the frame, and the tension rods are passed through the grids and the profile U-shaped strips are installed on them, abutting with ends on the surfaces of the grids on both sides from part of the longitudinal supports. The grids are installed with a slope in cross section, directed in opposite directions. Fig, I shows a double screen sieve, a general view; in fig. 2 is a view A of FIG. one; in fig. 3 - section BB of the device for tensioning grids on the fng. 2. The sieve of the screen contains a frame with transverse beams 1, to which longitudinal supports are attached to the top and further below. Grids 3 with the least possible slack are fixed to the frame on both sides with additional supports 4 and flanges 5. Tension rods 6 on which tension U-shaped profile strips 7 are installed with supports on the outer side of grids. The tension of the branches is carried out when the fastening elements 8 are tightened through the elastic element 9, which, by its deformation, compensates for the stretching of the net during operation. The tension of the grids occurs due to a change in their contour formed by the supports 2 and 4 and the tension by the profile U-shaped strips. In this case, the tensioning stroke is commensurate with the relative elongation of the mesh contour. This sieve design is significantly smaller in terms of metal consumption and overall dimensions compared to the known sieve design. It eliminates the need for a second row of transverse beams and halves the number of tensioning devices. The screen is arranged in separate sections in a multi-layered design and provides good access to the grids. Due to the alternation of positive and negative angles of inclination of the grid sections in the cross section, the material is evenly distributed in height. With a slight difference in height, the efficiency of screening and even wear of the grids is increased, which contributes to an increase in their service life and reduces operating costs. The scope of application of this sieve is much wider, since it allows the sieving surfaces to be set which are not stretchable. In this case, the tensioning device is used as a secure longitudinal mount. Claim 1. Sieve screen containing frame with transverse beams, longitudinal supports, one above another mesh and tension rods with fastening elements and core bars, characterized in that, in order to simplify the design and ensure compactness, to one row of transverse additional longitudinal supports are attached at the bottom of the beams, the ends of the grids are rigidly fixed to the frame, and the tension rods are passed through the grids and profile bars are installed on them, made in the form of U-shaped elements abutting ntsami in the surface of the grids on both sides of the longitudinal part of the supports. 2. The screen of Claim 1, is distinguished by the fact that, in order to ensure the distribution of material in pastiOMeporo, the grids are installed with a slope in cross section directed in opposite directions. Sources of information taken into account in the examination 1.Patent of France No. 1237448, cl. In 07 In, pub. 1958.

2. US patent No. 3307699, CL. 209-403, published. 1970 (prototype).