SU1599129A1 - Apparatus for separating grain mixtures - Google Patents

Abstract

The invention relates to the separation of bulk materials into fractions used in the agricultural, mining and chemical industries and in the building materials industry. The goal is to increase the separation efficiency due to the uniform distribution of the material with respect to the length of the screening screw drum (PVB) 3. PVB 3 is made from individual sections in the form of helical springs (VP) 4 with different coil pitch, increasing from the loading end to the unloading end of the PVB 3. At The ends of each section of the VP 4 are fitted with annular bushings (CV) 5. The CV 5 is mounted on poles made in the form of an anvil rollers 6, leading and supporting rollers 7 mounted on shafts 8 and 9. The diameters of rollers 6 and 7 decrease, and the diameters of CV 5 increasing TC from the loading end to the unloading end of the PVB 3. A drive 10 of the PVB 3 rotation is connected to the shaft 8. The cross section profile of the VP 4 is made of a triangular shape with a rounded apex directed to the axis of the PVB 3 and with a height decreasing to the unloading end of the PVB 3. Adjacent turns VP 4 are made with different roughness. After the grain mixture is fed, the VP 4 is rotated through the HF 5 and the rollers 6. The separable particles, moving along the VP 4, are sieved and fall into the corresponding outlets of the discharge chutes 13. The rotation frequency decreases from the loading end of the PVB 3 to discharge, which increases the uniformity download all sites. The triangular profile of the coils of VP 4 reduces the injuries of particles and increases the contact area between the rods. 2 hp f-ly, 2 ill.

Description

rollers 7 fixed on shafts 8 and 9. The diameters of rollers 6 and 7 decrease j and the diameters KB 5 increase from loading to unloading box of PVB 3. The drive 10 of PVB rotation 3 is connected to the shaft 8. The cross-section profile of VP 4 is made of a triangular shape 1 with a rounded apex directed to the axis of the PVB 3 and with a height decreasing by a factor of 1 to the opening end of the PVB 3. The adjacent turns of VP 4 are made with different roughness. After feeding the grain mixture VP 4 is carried out in

rotation through KB 5 and rollers 6, Sep- | Surrounding particles, moving along VP 4, are sieved and fall into the corresponding outlets of the discharge chutes 13. The rotation frequency decreases from the charging end of the PVB 3 to the discharge end, which increases the uniformity of loading of all sections. The triangular profile of the coils of VP 4 reduces the injury rate of particles and increases the contact area between the rods. 2 hp ff, 2 ill.

The invention relates to the separation of bulk materials into fractions and can be used in the agricultural, mining, chemical industries, construction materials industry.

The purpose of the invention is to increase the separation efficiency by improving the uniform distribution of the material along the length of the drum.

FIG. 1 schematically shows the proposed device; in fig. 2 - view A on 4ig, 1.

The device includes a boot device 1, located in the boot cylinder 2, connected to a spiral bar with a ban 3, made of separate sections in the form of helical springs 4, made with different pitch of turns, the diameter of which is

decreasing from the loading end to the unloading end. The step of turns of each subsequent section from the loading end to the unloading one is greater than the forward one. An annular bushings 5 are mounted at the ends of each section of the coil springs 4. The sleeves 5 are extended from the loading end to the unloading end. The sleeves 5 are mounted on supports, made in the form of support rollers 6, leading and supporting rollers 7, mounted on the shaft 8 and 9. The diameter of the rollers 6 and 7 decreases from loading to unloading.

the drum, on the shaft of which the drive sprocket 11 is mounted, is connected by a chain transmission with the sprocket 12 fixed on the shaft 8.

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The cross-sectional profile of the coils of the springs 4 is triangular in shape with its apex directed toward the axis of the drum 3 and with a height decreasing to p-z the weight of the internal end of the drum. Adjacent coils SPRING springs are made | with different roughness. Under the springs. 4, with the same inter-turn spike-lOM, discharge trays 13 are placed.

The device works in the following way.

. The initial grain mixture from the loading device 1 is fed to the inner surface of the screw lancet 3, consisting of several c. spring 4. Springs 4 are driven into rotational movement through annular bushings 5 and driving support rollers 6i. Leading rollers 7 are driven into rotational movement by a drive 10 connected to shafts 8 and 9 and sprockets 11 and 12 to them. The diameters of the support rollers 6 of each subsequent section from the loading end to the load are less than the previous one, due to which the rotational speed decreases from the loading end to the unloading load. Separable particles move along helical spring 4, are sieved and fall into the corresponding outlets of the discharge chutes 3 The spring sections with a frequency decreasing from the loading end to the unloading one will make it possible to reduce

reflectivity of turns on

areas close to the unloading end, which creates favorable conditions for screening the passage particles, thus rotating with decreasing

frequency will increase the uniformity of loading of all sections (because the transport capacity of sections with large increments, more sections with smaller increments at the same rotational frequency), which leads to an increase in the separation efficiency. Separation efficiency increases with decreasing coil diameters while simultaneously reducing the frequency of rotation of spring coil sections from the loading end to the unloading end, since there are favorable conditions for screening the material, i.e. backing material forms a layer of optimum height.

The execution of adjacent coils of the helical spring with different roughness makes it possible to increase the passage of particles in the interturn space due to the rotating orienting moment, which arises due to the different tangential forces acting on the particle that is in the meteor space.

The triangular profile of the coil spring allows to increase the transport

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Claims (3)

1. A device for separating grain mixtures, including a screening screw drum, made of separate sections with different pitch of turns, increasing from the loading to the unloading end of the drum, and with ring sleeves along the outer diameter of turns, driving the drum, supporting rollers, Sided with them, on which the areas of the screw drum are located by means of ring bushings, characterized in that, in order to increase the separation efficiency by improving the distribution of material length distribution the drum parts of the screening screw drum are made of separate screw springs, the diameter of the turns of which is made decreasing from the loading end to the discharge end, and the profile of the final section is triangular with apex directed to the axis of the drum and decreasing to the discharge end of the drum, diameter of road wheels of the sections is made 25 the ability of the separated particles along the VMPlot the length of the drum and the uniformity of the distribution of division of the material. and between the turns. You- ° Increase from the loading end to the discharge end of the drum. Filling the height of the spring coil profile with decreasing from the loading end to the unloading one allows reducing the speed of transporting large particles from the loading end to the unloading one. Making a triangular profile of the coils reduces the trauma of the seeds and increases the contact area between the rods. 35 40 2 The device according to claim 1, which is based on the fact that the adjacent coils of the coil springs are made with different roughness ... 3. The device according to claim 1, 1, 2, and 10, is that the triangular shape of the cross-section of the turns is made with a rounded tip. , 599129 F o pm lla and acquisitions ten 1. A device for separating grain mixtures, including a screening screw drum made of separate sections with different pitch of turns, increasing from the loading drum to the unloading end of the drum, and with ring sleeves along the outer diameter of the turns, driving the drum, supporting rollers associated with the latter on which the sections of the screw drum are located by means of ring bushings, characterized in that, in order to increase the separation efficiency by improving the uniform distribution of the material over In other words, the drum sections of the screening screw drum are made of separate screw springs, the diameter of the turns of which is made decreasing from the loading end to the discharge end, and the profile of the final section is triangular with apex directed to the axis of the drum and with a height decreasing to the discharge end of the drum, the diameter of the rollers of the sections is made 25 VMOchchkov executed     annular ° Increasing from loading 2 The device according to claim 1, which is based on the fact that the adjacent coils of the coil springs are made with different roughness ... 3. The device according to claim 1, 1, 2, and 10, is that the triangular shape of the cross-section of the turns is made with a rounded tip. View A with removable hopper u2