SU1634601A1 - Device for preventing sticking of damp loose materials to load-carrying surfaces - Google Patents

Abstract

The invention relates to means for facilitating unloading in devices for storing and transporting wet bulk materials. The aim of the invention is to increase the reliability of the device to prevent sticking of wet bulk materials when the material is unevenly loaded onto the load-carrying surface. The device contains parallel to one another mounted on surface 1 and electrically isolated from surfaces and one from another conductive plates 2 and connected to the plates through a voltage divider 3 Source 4 AC aperiodic change polarity apparatus provided with the switching unit 5 for combining adjacent plates 6 into several groups containing electrically bonded wafer All plates 2 are made of the same width, and the number of plates in groups of 6 varies monotonically. 2 or 4 O SA) o O

Description

The invention relates to means for facilitating unloading in devices for storing and transporting wet bulk materials, and may find application in the construction, mining, food industry and other sectors of the national economy.

The purpose of the invention is to improve the reliability of the device when uneven backfilling of material on the load-carrying surface.

The supply of a device for preventing wet bulk materials from sticking to the load-carrying surfaces by a switching unit for combining adjacent plates connected via a voltage divider with an alternating current source with an aperiodic change of polarity into several groups containing electrically connected plates ensures plates regardless of the amount of material above the plates.

FIG. 1 shows an electrical diagram of the device for preventing wet bulk materials from sticking to the load-carrying surfaces; in fig. 2 - the same, when switching the switching unit.

A device for preventing wet bulk materials from being loaded onto load-carrying surfaces contains parallel to one another mounted on the load-carrying surface 1 and electrically insulated from the surface and one of the other conducting plates 2 and connected to the plates through an voltage divider 3 of alternating current 4 with aperiodic change of polarity. The device is equipped with a switching unit 5 for combining adjacent plates into several groups 6 comprising electrically connected plates. All plates 2 are the same width, and the number of plates in groups b varies monotonically.

A device for preventing wet bulk materials from sticking to the load-carrying surfaces works as follows.

When voltage is applied to the conducting plates from the AC source 4 through the voltage divider 3, due to the potential difference between the plates, electroosmotic movement of moisture occurs in the direction from the plates with a higher potential to the plates with a lower potential.

Suppose that during the first two periods of alternating current source 4 alternating current switching unit 5 electrically united the plates 2 so that the rightmost group contains the largest number of plates, and the leftmost group contains the smallest, and the number of plates in groups 6 varies monotonously (Fig 2 ) Suppose also that during the first period of alternating current source 4 alternating current negative with respect to others is the rightmost group of plates then there will be a movement of moisture from the extreme left of the group to the right and all e, except for the leftmost plate group, will be covered with moisture. During the second, shorter period, the extreme left group will become negative relative to the others, and all except the right group of plates will be covered with moisture.

At the end of the first two periods of changing the polarity of the AC source 4, the switching unit 5 electrically closes the plates 2 into groups with a monotonic decrease in the number of plates in the groups from left to right (Fig. 1)

During the third period of polarity reversal of the current source 4, the leftmost group with the largest number of plates will be positive relative to other groups of plates, while all groups except the left are covered with moisture.

During the longer fourth period of polarity reversal of the current source 4, the extreme left group will be negative relative to the other groups of plates and all groups, except the extreme right, will be covered with moisture.

Thus, each time the groups with the largest number of plates are the most humid. Due to the use of the switching unit 5, these groups periodically change their location and wetting of the material.

The switching unit 5 can be implemented as a system of multi-contact relays with normally closed and normally open contacts, the relay system having feedback with the switch of the polarity of the alternating current source and triggered after a certain number of polarity change periods.

Claims (1)

Apparatus of the Invention A device for preventing wet bulk materials from sticking to load-carrying surfaces, containing parallel to one another mounted on a load-carrying surface and electrically isolated from a load-carrying surface conductive plates and an alternating current source connected to the plates through an aperiodic polarity change, characterized in that, in order to increase the reliability of work with uneven backfilling of material onto the load-carrying surface, it is equipped with utatsionnym a unit for combining the plates into several groups containing electrically connected plates, the plates being of the same width and the number of plates in the groups varying monotonically. I I J