LT4652B - A device for ventilating of pourable products - Google Patents

Abstract

The device for ventilation of loose bulk products is intended for root vegetable storage equipment. In the ventilation device, which consists of two main channels (1) with air blowers at opposite ends, and alternating air intakes (3) covered by grids (4), at the point where each air intake joins each main channel, a diffuser with double action valve is installed. The valve has a mechanical connector to the disc that covers the airflow; it is raised above the level of the storage floor and the disc opens when it feels pressure from loose products being loaded on it (as the product gradually fills the storage space), and air starts flowing in the air intake.In other cases, when the main channels (1) of the filled storage area work alternatingly, the valves close from inside, thereby stabilizing the evenness of ventilation throughout the pile of the product.<IMAGE>

Description

BACKGROUND OF THE INVENTION The invention relates to equipment for storing agricultural products, such as root crops, which provide the necessary ventilation regimes. during storage periods.

Known ventilation unit according to GB patent no. 1020279, F 26b, A Olf, B02 b consists of a duct system exiting the main duct to supply air to the blower.

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The disadvantage of this unit is that as the air flow rate changes, its velocity in the duct system changes.

The aforesaid deficiency does not have a device according to SU a.l. No. 1584818, which concludes15. one of the distribution ducts alternately connected to parallel main ducts with blowers at their opposite ends. But when the unit operates in different modes, ventilating it in one or other blower, air moves in the shortest path and enters an adjacent duct, and through it into an inactive duct until it is filled, the efficiency of ventilation diminishes.

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Another disadvantage is that when the storage space is not fully occupied, it is necessary to close a part of the distribution, ducts, for reasons of economy. This is done by a service worker entering the main channel. Therefore, channels must be safe for human work in them and should have 25. ie larger cross-sectional dimensions than those calculated.

The object of the invention is to improve the efficiency of the ventilation system, to reduce maintenance costs and to improve the working conditions of the personnel.

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This problem is solved by the device according to claim 1, characterized in that at the junction of each duct and main duct the diffuser is equipped with a double action valve in the form of a vertical damper, which is fixed at the lower edge in the duct groove. by a hinge - articulated to a two-link lever, the other end of which rests on the underside of the grid plate covering the duct. This plate has the ability to move freely vertically, with unloaded ventilated material rising above the floor level through the height of the locking groove.

10. The invention is explained in the drawing, in which:

FIG. - provision of a general volumetric ventilation unit for bulk products;

FIG. - schematic diagram of the duct valve when the unit is not loaded with product;

FIG. - position of the duct valve during product ventilation and air

15. supplied from the main channel;

FIG. - valve position when air enters the duct from an adjacent duct;

The bulk ventilation unit consists of a basic parallel20. at the opposite ends of the manifold ducts 1 with blowers 2 alternately connected to the distribution ducts 3 covered by grating panels 4 at the storage floor level. At the junction of each duct 3 with a main channel 1 is provided a diffuser with a double action valve (Fig. 2) consisting of a vertical damper 6 with its area covering the opening of the diffuser 5.

25. The damper 6 is fixed at its lower edge in the bottom groove 7 of the duct 3, and the upper one is secured to a double lever S whose second end rests on the underside of the grid plate 4.

The grille plate 4 has the ability to move freely vertically. In the presence of a valve

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latches for 6 fixed positions, i.e. when the bottom of the damper 6 is in the groove 7, the lever 8 raises the plate 4 above the floor level through the height of the locking groove 7.

5. The bulk product ventilation unit shall be used as follows.

The storage unit with the bulk product ventilation unit is gradually filled with product to prevent its heating, blowing air into the bed, which for this period must be twice as large as the main storage time required by the storage technology.

10. For this purpose, the blowers 2 'which are actuated and the open air ducts 3 enter the product layer. The ducts 3 open automatically when the product is loaded on the raised grid plate 4, which is in contact with the lever 8 of the valve valve 6 (Fig. 3).

The air blowing mode is changed during the main storage period. Venti15. alternating between one and the other in a blower. In this way, the pressures in the adjacent ducts are different - one is pressurized and the other is not. The air moves through the path of least resistance, entering the latter. This is because the distance between them is technically less than the product layer, for example 0.8 layer height for potatoes.

20. Upon reaching the valve valve 6 (Fig. 4), it is pressed tightly against the opening of the diffuser 5, although the positions of the lever 8 and the grating plate 4 are operative. The venting process in the layer normalizes.

Automatic ducting control simplifies servicing25. the work of the maintenance staff and the design of the main ducts, as there is no need for man to enter them for dampers adjustment. The venting process becomes more efficient by avoiding air leakage into the dormant main duct by alternating blowers.

Claims (4)

DEFINITION OF INVENTION 1. A bulk ventilation unit shall consist of a grid plate-mounted distribution duct alternately connected to parallel main ducts with blowers at their opposite ends, characterized in that a diffuser with a double action valve is provided at the connection of each duct and the main duct. 2. Ventilation device according to claim 1, characterized in that the valve consists of a vertical damper fixed at its lower edge in the duct groove and at its upper end hinged to a two-tiered lever whose second end rests on the underside of the grating plate. 3. Ventilation device according to claims 1 to 2, characterized in that the grating plate on which the valve lever rests is mounted in such a way that it can move freely vertically and that the unloaded ventilated product rises above the floor level through the height of the catching groove. 4. A venting device according to claims 1-2, characterized in that the diffuser is sealed in a valve valve.