SU870301A2 - Gravity-air device for unloading loose materials from floor storage - Google Patents

Description

(54) AEROGRAPHIC DEVICE FOR UNLOADING

BULK MATERIALS FROM WAREHOUSES

FLOOR STORAGE

one

The invention relates to the field of storage and transportation of bulk materials.

In the main invention of auth. St. No. 420522 describes an airborne gravitational device for unloading bulk materials from outdoor storage warehouses, comprising a variable section groove, guide trays and a net separating the groove at an elevation height into the air inlet and transport parts, and fins fixed at an angle to one another above the groove.

Over the transport part of the gutter along its entire length, a box is attached to the ribs, the upper walls of which are adjacent to the ribs, and the side walls are parallel to the side walls of the groove 1. Two parallel loading slots form between the walls of the transport part and the box. In such a device, the transport consumption is reduced by 30%, the performance is almost uniform over time, the dusty air is removed in an organized manner, and the ventilation consumption is reduced by 12-15 / o.

However, as shown by experimental and production tests, in the process

Venting from the total aerodynamic resistance of the embankment constitutes a layer of bulk material in the loading slit, which is 0.5-2% of the height of the blown layer. In addition, during transportation, the elastic side valves are influenced by the pressure of the exhaust air during transportation and thereby partially pinch the loading slot, which leads to a reduced flow of material through the loading slots to the grille and, therefore, incomplete

10 using the air supplied through the grill.

The aim of the invention is to reduce the energy intensity of the transportation process.

This is achieved by the fact that between the ribs

15, supporting horizontal plates are fixed, and the guides have horizontal supporting edges, between which elastic valves are fixed and supporting horizontal plates.

In addition, in the guide trays

20, openings may be provided for reliable operation of the anti-dust valves.

FIG. 1 shows the proposed device, a general view; in fig. 2 is a view A of FIG. one; in fig. 3 is a section BB in FIG. one.

The device contains an air inlet groove 1. It is equipped with an air distribution grill 2, equipped with guide trays 3.

Above the lattice 2 there is a duct 4 along the entire length, fixed with the help of ribs 5. Horizontal support plates 6 are fixed between the ribs 5. Guiding trays have horizontal support edges 7.

Between the plates 6 and the edges of the fixed elastic valves 8.

In the guide chutes 3, holes 9 are made in its walls with a certain pitch, which serve for the adjustable lifting of the valves 8 over 3 while freeing them from the material.

The device works as follows.

In the process of transportation, after unloading a part of the material by gravity, air is supplied to chute 1, which, passing through lattice 2, pseudo-liquefies and transports the flow of bulk material to the discharge end of chute 1. As the bulk material is transported from the erecting embankment, it flows evenly through the discharge gaps until the discharge ends, and the dusty air is removed from the storage with the help of duct 4. In the case of the release of a part of the device from bulk material, its elastic valves 8, which are no longer experiencing pressure from above the lying embankment, under the influence of residual deformation and low air pressure passing through the holes 9, is raised above the guide trays 3 of the grating 2 and, picked up by a stream of dusty air, are pressed to the edges of the vertical walls of the box 4 and fixed to it the edges of the ribs 5 the most sealed transport channel, which prevents the breakthrough of air into the warehouse.

In the ventilation mode, the air supplied to the chute 1 through the grate 2 and the layer of bulk material lying on it passes into the loading slots and immediately spreads like a fan into the bulk material lying on top. At the same time, elastic valves 8 are tightly pressed by the bulk material to the guide chutes 3 of the grille 2. Box 4 in this case serves to equalize the air flow parameters along the length of the device.

The elimination of the vertical wall required to press the elastic anti-dust valves reduces the aerodynamic resistance by 15-20% compared with the prototype in the process of venting the overlying mound of bulk material, which causes a decrease in the energy intensity of the ventilation.

During transport, the horizontally mounted valves 8 are pressed against the trays 3 and have virtually no effect on the transport process. The bulk material enters the grate as much as the air flow carries. Such a process ensures a reduction in the energy intensity of the transportation process by 30-50% and provides an increase in productivity of one and a half to three times depending on the parameters of the supplied air (filtration rate).

In addition to the above advantages, in the proposed construction, the cost of assembly work and materials is reduced by eliminating the installation of a set of strips, the requirements for the valve material are also reduced, and its consumption is reduced.

It should also be borne in mind that the reliability of the sealing effect is increased when the valves are pressed against the sharp edge - the vertical wall of the box.

The expected economic effect on one storage facility with a capacity of 3200 tons of grain is 5-10 thousand rubles. per year, which allows for the widespread introduction only in the system of blanks to determine the economic potential. - 25 million rubles. in year.

Claims (2)

1. Airborne gravitational device for the unloading of bulk materials from outdoor storage warehouses according to ed. St. No. 420522, characterized in that, in order to reduce the energy intensity of the transportation process, supporting horizontal plates are fixed between the ribs, and the guides have horizontal supporting edges, between which elastic valves are fixed and supporting horizontal plates. 2. An apparatus according to claim 1, characterized in that holes are made in the guide trays. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 420522, cl. In 65 G 53/00, 1972. bida FIG. one 6-6 figure 2. fie.Z