SU865423A1

SU865423A1 - Device fo securing the grate bars of a sieve

Info

Publication number: SU865423A1
Application number: SU802872760A
Authority: SU
Inventors: Герман Евгеньевич Свинцов; Леонид Карпович Валабатько
Priority date: 1980-01-21
Filing date: 1980-01-21
Publication date: 1981-09-23

Description

(54) УСТРОЙСТВО ДЛЯ КРЕПЛЕНИЯ КОЛОСНИКОВ СИТА(54) DEVICE FOR SITTING OF SIT SPEAKERS

1one

Изобретение относитс к устройствам дл разделени сыпучих материалов, в частности к ситам грохотов, имеющих средства креплени колосников.The invention relates to devices for separating bulk materials, in particular screening screens having means for fixing grid bars.

Известно сито грохота, содержащее колосники , опирающиес на поперечные балки рамы, в котором параллельно расположенные стержни колосников закреплены в поперечных опорных элементах, имеющих пазы соответствующего профил , в которые укладываютс стержни. Кроме того, каждый стержень, приварен к опорным элементам . Между овальными пазами элементов и круглыми стержн ми предусмотрена точна подгонка с образованием плавной поверхности сита 1.A screening sieve is known, which contains grates resting on the transverse beams of the frame, in which the parallel rods of the grates are fixed in transverse support elements having slots of the corresponding profile in which the rods are laid. In addition, each rod is welded to the supporting elements. Between the oval grooves of the elements and round rods, an exact fit is provided to form the smooth surface of the sieve 1.

Недостатком такого сита вл етс трудоемкость его изготовлени , св занна с тем, что каждый паз опорных элементов дл обеспечени посадки стержн в элемент должен быть отфрезерован дисковой фрезой, заточенной по радиусу, равному радиусу стержн .The disadvantage of such a sieve is the laboriousness of its manufacture, due to the fact that each groove of the supporting elements to ensure the fit of the rod into the element must be milled with a disk cutter, sharpened along a radius equal to the radius of the rod.

Кроме того, трудоемким процессом вл етс приварка стержней к элементам креплени . В месте приварки стержни прожигаютс и в процессе работы грохота вIn addition, the labor-intensive process is welding the rods to the fastening elements. At the welding site, the rods are burned and during the operation of the screen in

этих местах обламываютс . При этом сито из круглых колосников быстро забиваетс , так как щель между такими колосниками сужаетс от верхнего среза колосников до их продольной оси. Забиванию сита способствуют и поперечные элементы, выступы которых расположены на одном уровне с колосниками .these places break off. In this case, the sieve from round grates quickly becomes clogged, as the gap between such grates narrows from the upper edge of the grate to their longitudinal axis. Transverse elements, the protrusions of which are located on the same level with the grate, also contribute to the blocking of the sieve.

Недостатком вл етс и то, что при поломке одного колосника нужно мен ть все сито.The disadvantage is that when one grate breaks, the entire sieve must be changed.

Известно также устройство дл крепле10 ни колосников сита, содержащее опоры под изогнутые концы колосников и элементы креплени колосников к опорам, в котором концы изогнутых колосников вставлены концами в гнезда передней и задней 5 плиты, причем в задней плите колосник удерживаетс силой упругости, а в передней - фиксирующей планкой и клином 2.It is also known a device for fixing 10 grates of a sieve, containing supports for the curved ends of the grates and fastening elements of the grates to the supports, in which the ends of the curved grates are inserted into the front and rear 5 of the slab with the ends in the rear plate of the grate fixing plate and wedge 2.

Claims

A disadvantage of the known construction is that the replacement of the grate can be made directly only under the 20 box, which is not always possible at the place of operation. Another disadvantage is the unreliability of fixing the grid bars with a bar and a wedge, since during operation of the screen, wedges can jump out of their sockets and get into the receiving funnel along with the undersize product, which can lead to breakdown of the process equipment. To replace the grate, the screen must be stopped for a considerable time each time. In addition, when replacing the grate, adjacent grate bars located in front and behind interfere, or otherwise they need to be separated from each other along the length of the box by a considerable distance, which reduces the living cross section of the sieve and leads to an increase in the length of the box and improved design. All these shortcomings have a negative impact on the technical and economic indicators of the rumble. The purpose of the invention is to improve the ease of installation and dismantling of the grate, as desired. The goal is achieved by the fact that each support is made in the form of a gutter, and each fastening element is made in the form of a wedge, on inclined surfaces of which combs are made facing the inner surfaces of the gutter, while the ends of the grate are located between mi gutter support. FIG. 1 shows a device for fastening grates; in fig. 2 is a view A of FIG. one; in fig. 3 is a section BB in FIG. 1. A device for fastening the grid bars of the sieve, contains supports 1 for the curved ends of 2 grid bars and elements 3 for fixing the grid bars to the supports. Each support 1 is made in the form of a gutter, and each fastening element 3 is made in the form of a wedge, on the inclined sides 4 of which a comb is made that faces the internal surfaces of the gutter. The ends 2 of the grate are located between the ridges 5 of the fastening element and the inner surfaces 6 of the support grooves. The elements 3 are connected to the grooves by means of bolts 7. The device operates as follows. The installation of the entire sieve screening surface is carried out in the following sequence. A comb of the element 3 is installed on the first grooved support, and the nuts are tightened so that the grate can be inserted into the grooves of the comb. Then, a comb of another element is installed on the next support, which is also pressed with nuts so that the next row of grid bars can be inserted. After that, the nuts on the comb of the first element are tightened. In this sequence, the entire screening surface is installed. The proposed grate attachment allows to achieve the largest working surface, simplifies the design, installation and dismantling. Apparatus of the Invention A device for fastening the grid bars of a sieve, comprising supports for the curved ends of the grid bars and elements for fixing the grid bars to the supports, characterized in that in order to increase the ease of mounting and dismounting the grid bars, each support is made in the form of a gutter , on inclined surfaces of which combs are made, facing the inner surfaces of the gutter, with the ends of the grates located between the crests of the fastening element and the inner surfaces of the gutter of the support. Sources of information taken into account in the examination 1. US patent No. 3805955, cl. 209-395, published. 1974.

2. USSR author's certificate number 288911, cl. B 07 B 1/46, 1969 (proto