RU2222485C1 - Screw conveyor for transportation of loose loads - Google Patents

Abstract

FIELD: mechanical engineering; transportation of loads curvilinear path. SUBSTANCE: proposed screw conveyor contains drive auger shaft with screw blade mounted in cylindrical trough. Guide of cylindrical trough is made curvilinear, and drive auger shaft is made in form of flexible shaft formed by double-lay rope, and screw blade is made in form of flat strand rigidly connected by one of its semiround parts to two adjacent outer round strands of double-lay rope. Larger axis of flat strand is located in diametric plane of double-lay rope. EFFECT: increased efficiency of transportation of loose loads over curvilinear path. 3 dwg

Description

The invention relates to screw conveyors for transporting bulk cargo.

A device is known (Evnevich A.V. Transport vehicles and complexes. 3rd ed., Rev. And add. M., Nedra, 1975. 415 p.: P. 142) of a screw conveyor, the construction of which contains a drive, a trough with a semi-cylindrical bottom and a screw located along the axis of the gutter.

With this screw conveyor, the load moves only along a straight path. It is impossible to move cargo along a more complex (curved) trajectory with such a conveyor. In addition, the reliability of the conveyor is impaired, since congestion is formed in the intermediate bearings.

A device is known (AS USSR, No. 1333595, MKI V 30 V 9/14, 4054307 / 31-27; publ. 30.08.87. Bull. No. 32-1987) containing a drive screw shaft mounted in a pipe with guides screw blade.

This device moves the load only along a straight path. It is impossible to move cargo along a more complex (curved) trajectory with such a conveyor. In addition, the reliability of the conveyor is impaired, since congestion is formed in the intermediate bearings.

The closest in technical essence and the achieved result to this invention is a screw conveyor (Spivakovsky A.O., Dyachkov V.N. Transporting machines. 2nd ed., Revised and enlarged M., Engineering, 1968. 504 pp.: p. 361), consisting of separate successive straight-line sections, and transporting cargo along a broken path. Each straight section contains its own screw. To drive the screws into rotation, a separate drive is installed on each straight section, or the screws of this conveyor are connected to each other by gears.

The disadvantage of this design is the low reliability of the movement of the cargo due to the formation of congestion in the places of installation of the intermediate bearings, and the complicated design of the screw conveyor.

The invention is aimed at improving the efficiency of transporting bulk cargo along a curved path.

This is achieved by the fact that the screw conveyor comprises a drive screw shaft with a screw blade mounted in a cylindrical trough, characterized in that the guide of the cylindrical trough is curved, the drive screw shaft is in the form of a flexible shaft, which is a double twist rope, and a helical blade is in the form a flat strand, which is one of its two semicircular parts, rigidly attached to two adjacent outer round strands of a double strand rope, the major axis of the flat strand being in the diametrical plane double-lay rope.

Figure 1 shows a screw conveyor, General view; figure 2 - screw shaft, made in the form of a flexible shaft; figure 3 is a cross section of a screw shaft.

The screw conveyor contains a cylindrical groove 1, the guide 2 of which is curved, inside of which there is a drive screw shaft 3 with a screw blade 4. The drive screw shaft is made in the form of a flexible shaft, which is a double twist rope 5, and the screw blade is in the form of a flat strand 6 , which one of its two semicircular parts 7 is rigidly attached to two adjacent outer circular strands 8 of the double twist rope 5, the major axis of the flat strand 9 being in the diametrical plane 10 of the double twist rope 5. Rigid attachment of a flat strand 6 to two adjacent outer round strands 8 is carried out by resistance welding or gluing. To bring the screw shaft 3 into rotation, drive 11 is used. Bulk cargo (not shown conditionally) is supplied to the cylindrical trough 1 through the loading hatch 12. Unloading from the cylindrical trench 1 is made through the unloading hatch 13.

The device operates as follows: the drive 11 is turned on, the screw shaft 3 inside the cylindrical groove 1 begins to rotate. The bulk cargo fed through the loading hatch 12 moves along the cylindrical trough 1 and is unloaded through the discharge hatch 13. Due to the great flexibility of the screw shaft 3, the cargo moves along any curved path. When the screw shaft 3 rotates, the flat strand 6 is pressed with its semicircular part 7 to the inner surface of the cylindrical groove 1, especially in the places of its bending, and, accordingly, the increase in resistance to rotation. To reduce this resistance, the cylindrical trough 1 is coated with antifriction material from the inside.

Claims (1)

A screw conveyor comprising a drive screw shaft with a screw blade mounted in a cylindrical trough, characterized in that the guide of the cylindrical trough is curved, the drive screw shaft is in the form of a flexible shaft, which is a double twist rope, and the screw blade is in the form of a flat strand, which one of its two semicircular parts is rigidly attached to two adjacent outer round strands of a double strand rope, with the major axis of a flat strand located in the diametrical plane of the double strand lay

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