SU973192A1 - Classifier for separating materials - Google Patents

Description

The invention relates to techniques for separating granular materials into fractions and can be used in various sectors of the economy, where classification by size of granular materials is necessary. ⁵

A device is known comprising a housing, a loading device, receiving chambers, a fan of £ 1J.

The disadvantage is the low quality separation of the material.

The closest in technical essence and the achieved result to the proposed one is a device including a housing, loading and unloading chutes, air supply devices, a suction pipe for air and separation devices £ 2J.

The disadvantage is the low quality: in the separation. ²⁰

This goal is achieved in that the devices for supplying air are made in the form of spatial grids installed with the possibility of horizontal movement, the inner end of which is cut at an angle of 30-90 °, and the separation devices are made in the form of frames with stretched elastic strings.

In FIG. 1 shows a device, a General view; in FIG. 2 - node T in FIG. 1; in FIG. 3 is a view A in FIG. 1.

The device includes a housing 1 with loading 2 and discharge chutes of large 3 and small 4 materials. In the side wall of the chamber there are devices for air supply in the form of spatial gratings - upper 5 and lower 6, which can move in the horizontal direction. The inner end of the device for air supply is cut at an angle of 30-90 °, which allows to increase the residence time of the classified material in the zone of the supply air stream. Inside the chamber against the devices for air supply z 973192 installed separation devices 7 and 8, made in the form of a frame 9 with stretched elastic strings 10 (made of rubber, polyurethane, etc.). To the upper part of the frame 9 are attached a furnace-j tel 11, placed in cups 12 and spring-loaded by spring 13, to ensure constant tension of the strings. The shaking mechanism, consisting of a rod 14 with persistent elements 15 poe-10, helps prevent clogging of the separation grid. The rod is also installed in the guide cup 16 with the spring 17. The upper support plate of the rod 18 is located under the cam 19, rotating j; using a known mechanism. The chamber has a pipe 20 for suctioning exhaust air and guide plates 21-23. The pipe 20 through the dust collector is connected to the fan. jq

The device operates as follows.

The source material through the feed chute 2 along the guide plate 21 monolayer enters the device for 2 $ air supply 5, the inner end of which is cut at an angle of 30-90 °. If the cut is vertical, i.e. 90 ° or more, then the material will immediately lie in the AIR INJECTION AREA. At THIS 3Q, small particles caught in the aerodynamic shadow of large particles will fall with the latter into the heat of a large product 3. An angle of 30 ° is almost the lower boundary of the angle of repose of bulk materials . Therefore, when its value is below 30 °, the elements of the spatial lattice will collapse. Then, under the action of the air flow, the material enters the separation device 7, where particles of material having a size less than the boundary separation grain pass through the mesh and fall into the flow of the fine product 4, and large particles along the guide shelf 22 access to the lower feeding device

745 air 6 and a separation grid 8, where the final separation of small particles. Cleaning separators? and 8 the material clogged between the strings occurs in the following way: during rotation, the cam periodically exerts pressure through the support plate 18 onto the rod 14, which in turn, through the thrust elements 15, moves the upper part of the separator frame 9 downward, thereby weakening the strings 10 until they sag. At this point, all particles clogged between the strings fall into estrus 4. When the cam 18 rotates, the strings of the mesh are again in a tense state. This design of the chamber provides a high-quality separation of crushed building rocks to the required conditions. The necessary quality of separation can be ensured by moving the spatial gratings in the horizontal direction.If necessary, the maximum allocation of small classes of spatial gratings 5 and 6 are moved closer to the separation devices 7 and 8. If necessary, the allocation of smaller particles, the spatial gratings should be moved further from the separation grids.

Claims (1)

Separating devices 7 and 8 are installed, embodied in the form of a frame 9 with tensioned elastic strings 10 (made of rubber, polyurethane, etc.). Tops of the frame 9 are attached to the trowels 11, which are placed in glasses 12 and spring-loaded with a spring 13, in order to ensure the constant tension of the strings. A shaking mechanism consisting of stem 14 with stop elements 15 will prevent clogging of the separation net. The stem is also mounted in the guide cup 16 with the spring 17. The upper support plate of the stem 18 is located under the cam 19 rotating by means of a known mechanism. The chamber has a nozzle 20 for exhausting the exhaust air and guide plates 21-23. The nozzle 2O is connected to the fan through a dust collector. The device works as follows. The source material through the loading chute 2 along the guide plate 21 monolayer enters the air supply devices 5, the inner end of which is cut at an angle of 30-9 O. If the cut is vertical, i.e. 90 or more, the material will instantly run through the area of the incoming air stream, while the small particles that appear in the aerodynamic shadow of large particles will fall out with the last in the heat of the large product 3. Ungf DZ is practically the lower limit of the angle of repose of the bulk materials. Therefore, if its value is below the ZO, the elements of the spatial grid will fall. Further, under the action of the air flow, the material enters the separating device 7, where particles of material having a size less than the boundary separation grain pass through the grid and fall into the chute of the fine product 4, and large particles in the guide ass 22 are placed on the lower supply device air 6 and the separation grid is the final separation of small particles. The separation devices 7 and 8 are cleaned from the material between the strings in the following way: as the cam rotates, the cam 19 periodically exerts pressure through the support plate 18 on the rod 14, which in turn through the stop elements 15 moves the upper part of the frame 9 of the separator down, thereby weakening the strings 10 before they sag. At this moment, all the particles that are stuck between the strings fall into the chute 4. When the cam 18 is turned, the grid strings are again in a tight state. This chamber design provides high-quality separation of crushed building rocks to the required condition. The required separation quality can be ensured by moving in a horizontal direction spatial lattices. If it is necessary to maximize the allocation of small classes, the spatial lattices 5 and 6 are mixed closer to the separation tools 7 and 8. If necessary, the selection of smaller particles should be moved away from the separation grids. Claims. A classifier for separating materials, including a housing, loading and unloading chutes, air supplying devices, an air suction nozzle and separation devices, characterized in that, in order to improve the quality of separation, air supplying devices are designed as displaceable in horizontal the direction of spatial grids, the inner end of which is cut at an angle from 30 to 9O, and the separating devices are made in the form of frames with stretched elastic strings. Sources of information taken into account in the examination 1. The author's certificate of the USSR N 215152, cl. B 07 B 11/06, 1966, 2, USSR Author's Certificate Ni 2582183, Cl, B 07 B 4/08, 1978 (prototype). 8u9 / ( .