SU971724A1 - Apparatus for caving-in bridges of loose material in a hopper - Google Patents

Description

(54) DEVICE TO DECLINE THE ARMS OF BULK MATERIAL IN A BUNKER

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This invention relates to a device for breaking a set of bulk materials prone to caking and arching, such as coal, cement, crushed stone, etc.

A device for breaking the bulk material vaults in a bunker is known, containing a flexible working member connected to a drive of its rotation, the shaft of which is mounted in the walls of the silo neck, while the flexible working member is made in the form of a flexible beat (chain) 1.

The disadvantage of this device is the unsatisfactory collapse of the material, since one end of the flexible working member can be trapped by the material and remain stationary, and the other end of the flexible working member ,. coupled with its rotational drive, it makes a rotational-oscillatory motion on a limited area.

The aim of the invention is to increase the reliability of the crumbling of bulk material in the silo.

To achieve this goal, in a known device for breaking down bulk material vaults in a bunker, there is a flexible working member connected to a rotational drive, the shaft of which is installed in the walls of the hopper neck, the flexible working member is made in the form of a steel spiral spring, the inner end of which is rigidly fixed to drive shaft.

The drawing shows a device for breaking a set of bulk material in a bunker.

The device contains a flexible working body 1 and the actuator 2.

The shaft 3 of the rotational drive 2 is mounted on the wall of the neck of the hopper 4. At the end of the shaft 3, a flexible working body 1 in the form of a spring 5 of elastic flat steel with a fastening of its inner end to the shaft is fixed.

Depending on the shape and size of the hopper neck and the type of bulk material, the device can be installed in one or more rows along the height of the bunker.

The device works as follows.

Upon termination of the flow of bulk material from the bunker, which occurs during the formation of the arch, mainly

closer to the outlet, the actuator 2 automatically activates, which provides rotation of the shaft 3 with the spring 5. At the moment of start-up, the spring 5 twists to a minimum size, then as the rotation continues under the action of elastic forces of spring steel and centrifugal forces, the coil gradually increases in diameter and loosens the surrounding material, contributing to the decay.

Since the helix has an increased possibility of increasing its diameter, it may, depending on local resistance, cover a large area of loosening without jeopardizing the material, as in the case of local landslides on the working member, the helix collapses as a result of a sharp increase in resistance to rotation. the diameter, and then as the material loosens, increases again. At the same time, the tape, when twisting, is pulled out of the material, which excludes its pinching.

When the material comes into contact with the rotating plane of the helix, rather

its intensive loosening along complex trajectories with the movement of particles trapped between the turns of the spiral from the center of the spiral to its periphery with their simultaneous rotational movement.

Such an embodiment of the device ensures a stable supply of material from bunkers through timely and efficient collapsing, which is very important for the normal conduct of various technological processes.

Claims (1)

Invention Formula A device for breaking the bulk material in a bunker, containing a flexible working member connected to a drive, the shaft of which is installed in the walls of the silo neck, characterized in that, in order to increase the reliability of the device, the flexible working member is made in the form of a steel spiral spring, the inner end which is rigidly mounted on the drive shaft. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 658056, cl. B 65 D 88/68, 1977.