SU761393A1 - Louvres gate of air-dynamic conveyer - Google Patents

Description

The invention relates to transporting devices and can be used for unloading and transportation of bulk fine-grained materials and products and their ventilation during storage in warehouses, indoor areas, etc.

Known open aerodynamic conveyors designed for unloading, transportation and, if necessary, for ventilation of bulk fine-grained materials and products, consisting of a fan, air supply pipe, transport and air distribution channels, separated by a grid, made of flat straight plates of loading and unloading devices [1].

Also known louvered partition aerodynamic conveyor, consisting of plates that are installed with a gap between them. The louvre grille is made of several sections connected in series with each other with different degrees of louver opening in adjacent sections [2].

The disadvantage of this louvre grating conveyor is that the particles

in the conveyor belt

2

move at different speeds due to the decelerating action of the walls of the conveyor conveyor channel and friction and loose particles bonding to each other, moving in different longitudinal-vertical planes of the layer.

The purpose of the invention is to increase productivity, reduce damage and equalize the temperature of the particles of the transported material.

The goal is achieved by the fact that the plates are arranged with a gap, which gradually increases along the width of the air supply channel of the conveyor in the direction from the middle longitudinal-vertical plane of the partition to its edges.

In addition, the output edge of each plate ¹⁵ has a stepped shape and has several embodiments: the output edges are parallel to the input straight line.

edge; the output edge of the middle part of the plates is parallel to the input edge, and the side edges

20 edges are angled to the middle part of the plate; the exit edge of the plates has a straight line shape in the middle part, conjugated with convex curves; the output edge of the plate has in the middle

761393

the shape of a straight line associated with concave curves; the output edge of the plates has the shape of a broken line associated with concave curves; the output edge of the plates has the shape of a broken line consisting of two segments; the output edge of the plates has the shape of a concave curve, symmetrical about its midpoint.

FIG. 1 schematically shows a conveyor, section; in fig. 2 — node I in FIG. one; in fig. 3 - patterns of change in the output edge of the plates along the width of the air-distributing channel.

 The aerodynamic conveyor contains a fan 1, an air supply pipe 2, an air supply 3 and transporting 4 channels, separated by a louvre louvered grille 5, a discharge window 6 with a damper 7. The grille 5 has plates 8 that form slots 9 for air jets to exit into the transport channel 4, moreover, the input edge of TP plates facing the moving air flow, has a rectilinear shape. The opposite (output) edge may have a stepped shape, the lines of which are parallel to the input edge of the TP, the number of segments of the stepped line is 3.5, etc. (Fig. 3a); step shape, the middle line of which is parallel to the entrance edge, the side lines are angled to the middle line (Fig. 3c); the shape of a straight line in the middle part conjugated with convex curves (Fig. 3 s); the shape of a straight line in the middle part, conjugated with concave curves (Fig. 3 6); the shape of a broken line consisting of two segments (Fig. 3e) or the shape of a concave line symmetrical about its midpoint (Fig. 3 3).

With this geometry of the plates 8, the slit gap 9 formed by two adjacent plates in the transverse direction has the smallest value L in the middle part, the largest value H is at the walls of the transport channel 4, and in the variant a the gap between the plates 8 changes stepwise in variants C and 6 in the middle part of the plates 8, the gap has a constant value, and as it approaches the walls of the transport channel 4, the gap gradually increases; in variants e and in the gap smoothly increases from the minimum value in the median longitudinal-vertical plane to the maximum value at the walls of the transport channel 4.

The technological process of unloading and transportation of bulk material, such as grain from the bins of the warehouse, is as follows. When you turn on the fan 1 and. opening the window 6 by raising the shutter 7, the particles of the bulk material under the action of the component of gravity and the kinetic energy of the air jets leaving their slit holes 9 formed by the plates 8, move along the plate lattice 5 and, moving away from it, go to the transporting or receiving device. When the conveyor is operating in the mode of transportation, the bulk material to be moved from the loading device is fed to the initial portion of the lamellar louvered grill 5 and 'as it leaves it enters the receiving or transporting device.

When installed in warehouses or in covered areas for temporary storage, conveyors are used for ventilating bulk material, if necessary, while the discharge window 6 remains closed by a shutter 7.

Increasing the height of the slots 9 formed by the adjacent plates 8 and the grill 5, in the direction from the longitudinal axis to the edges of the conveying channel 4, causes the air flow gradient to increase in its supply per unit time when moving per unit width of the plate grille 5 in the marked direction. Such an air supply increases the kinetic energy of the jets and, consequently, their impact on the particles of the material being moved as they approach the side walls of the transport channel 4. At the same time, the velocity of the material moves along the width of the plate grating 5, and since the particle velocity can have a value , closest to the maximum allowable, due to the strength properties of the transporting material, the productivity of the conveyor increases. In addition, the required performance of the conveyor is achieved at lower speeds. This prevents particle trauma and dust emission, which improves the sanitary and hygienic working conditions of the staff. Alignment of the speeds of movement of particles of a material causes their more uniform cooling (heating).

Claims (7)

Claim 1. Louvre partition of aerodynamic conveyor consisting of plates installed with a gap between them, characterized in that, in order to increase productivity, reduce damage and temperature equalization of particles, the plates are arranged with a gap gradually increasing along the width of the air passage of the aerodynamic conveyor in the direction from the average longitudinal vertical plane of the partition to its edges. 2. A partition on π. 1, characterized in that the output edge of each plate has a stepped shape, the lines of which are parallel to the input straight edge. 3. A partition on π. 1, characterized in that the output edge of the middle part five 761393 6 plates parallel to the input edge, and the side edges are angled to the middle part of the plate. 4. Partition on π. 1, characterized in that the output edge of the plates has in the middle of the shape of a straight line, conjugated with convex curves. 5. A partition on π. 1, characterized in that the output edge of the plates has in the middle of the shape of a straight line, coupled with concave curves. 6. Partition π. 1, characterized in that the output edge of the plates has the shape of a broken line consisting of two segments. 2 Editor M. Nedoluzhenko Order 6053/5 ten '7. Partition on π. I, characterized in that the output edge of the plates has the shape of a concave curve, symmetrical about its midpoint.