SU1750414A3 - Device for cleaning surfaces of dirt - Google Patents

Abstract

Use: for cleaning the inner surface of drying apparatuses from contamination during processing of products prone to sticking. The essence of the invention: the device contains paired electromagnets. Each pair of electromagnets contains a core fixed on the treated wall and a core fixed on the frame. The cores are aligned along the plane of the poles of the same name and are equipped with induction windings. The latter are interconnected counter-parallelly and connected to the network and control unit through the thyristors. In the course of operation, fields of the opposite direction are formed at the same poles, electromagnets repel each other and transmit a mechanical shock pulse to the wall of the apparatus, which leads to the removal of deposits from the inner surface of the apparatus. 3 il.

Description

The invention relates to devices for cleaning surfaces from contamination and can be used, in particular, for cleaning the inner surface of drying chambers from sticking products.

A device for cleaning the surface from contamination is known, which contains a mechanical impulse pathogen, made in the form of an electromagnetic inductor, directly adjacent to the surface of the skin to be cleaned.

The closest to the offer is a device that contains / ccc and

power supply; a pair of electrically coupled and interacting with each other induction pathogens of mechanical shock pulses. Moreover, one of the pathogens is rigidly associated with the framework, and the other with the wall being cleaned.

However, the high energy consumption for the formation of a single impulse and, consequently, the organic nature of the frequency range of the shock mechanical impulses makes it insufficiently effective for treating surfaces by a large band.

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Thus, due to low efficiency, the known structure requires a current source with a voltage of not less than 1000 V for efficient operation. This leads to the need to use powerful storage capacitors, the charging time of which is 10 s or more, which limits the frequency of pulse formation (not more than 0.1 Hz). All this reduces the technological capabilities of the device, increases the cost of the power source and the device as a whole.

The aim of the invention is to increase the cleaning efficiency by increasing the range of controlling the frequency and amplitude of the mechanical shock pulses and reducing energy intensity.

The goal is achieved in that a device for cleaning surfaces from contamination, containing a power source, a pair of electrically connected and interacting with each other induction pathogens of mechanical shock pulses, one of which is rigidly connected to the frame, and the other to be cleaned the control unit, the causative agents of mechanical shock pulses are made in the form of a pair of electromagnets, the cores of which are fixed respectively on the frame and the wall being cleaned and are coupled with each other along the plane of the same name a pole, the induction winding of the electromagnets are connected together antiparallel and are connected via a key element to a power supply and control loku.

The execution of exciters of mechanical pulses in the form of a combined pair of electromagnets makes it possible to sharply increase the efficiency due to the pairwise superposition of oppositely directed electromagnetic fields and their concentration at the Corresponding poles. At the same time, the direct combination of like-pole poles allows, firstly, to limit the distance between the magnetic fields to the limit and thereby ensure maximum efficiency of their repulsive

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interaction, and secondly, to provide a soft unstressed repulsion of the poles, which does not cause damage to the treated surface.

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The possibility of forming oppositely directed fields at the poles of electromagnets is achieved by counter-parallel connection of the corresponding electric windings between each other. In order to provide the necessary parameters of mechanical pulses in terms of frequency, amplitude, sequence, etc., the electric winding is connected to a power source and a control unit through a key element. In this case, a 220 V, 50 Hz network is used as a power source, a thyristor is used as a key element, and a schematic assembly is known in electrical engineering as a control. The core of the electromagnet is made in the form of an armored cup with a core.

Figure 1 shows the device, a general view; Fig. 2 is an electrical block diagram of the device; in FIG. 3, time diagrams of the passage of current pulses through the windings

The device contains paired electromagnets (inductors), the number of which is determined by calculation or experimentally, depending on the area of the treated surface.

Each pair of electromagnets contains a core 1 fixed on the treated wall 2, and a core 3 fixed on the frame 4. The induction windings 5 and 6 with the same electrical parameters are fixed in each core. Winding 5 and 6,7 and 8 are interconnected anti-parallel and connected through the thyristors 9 and 10 to the network

and control block 11, i

Control block 11 is built on the basis of principles known in electrical engineering and contains a driver

12 impulses, phase setting unit 13, frequency sensor 14, driver

15 delay, control signal switch 1b.

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The device works as follows.

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Depending on the mechanical characteristics of the treated surface (wall thickness, the presence of stiffeners, etc.) by sensors

13 and 14 establish the necessary

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amplitude and frequency of impulses during a working cycle. Using the shaper 15 delay set the required interval between cycles. Switch 16 provides a predetermined sequence of operation of pairs of electromagnets from L c to L n. When the device is connected to the network, the control unit 11 provides for switching of the key elements - thyristors 9 and 10 in a given time sequence. A pair of windings b and 6 electromagnet L simultaneously receives a current pulse, which forms magnetic fields of the opposite direction in them. These fields are amplified with the help of paired cores 1 and 3 and are concentrated on their poles. As a result of the interaction of oppositely directed fields, electromagnets repel each other and, taking into account that the rigidity of the frame 4 is obviously greater than the wall rigidity, the latter is deformed under the action of a mechanical impulse that occurs in the paired electromagnets. Then the wall 2 returns to its original position under the action of its own elastic forces. At the next time point, a current pulse arrives at the windings 7 of electromagnets Lg, where a similar process takes place. The sequence of operation of pairs of electromagnets is illustrated by a time diagram (Fig. 3). The time determines the intervals between the triggering of the previous and the subsequent electromagnet pairs and is adjusted by the setting device 1 in the interval 0.02-1 sec. Thus, all pairs of electromagnets are triggered in a given sequence,

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duration during one working cycle. After a predetermined delay period, the cycle repeats, which leads to the removal of deposits from the inner surface of the working chamber, apparatus, etc.

The use of the invention makes it possible to abandon traditional capacitive power sources in this field, expand the possibilities of forming mechanical pulses in frequency and amplitude, reduce energy consumption and manufacturing costs.

Claims (1)

Invention Formula A device for cleaning surfaces from contamination containing a power source, a pair of electrically connected and interacting with each other exciters of mechanical shock pulses, one of which is rigidly connected with the frame, and the other with a wall to be cleaned. cleaning efficiency by expanding the range of controlling the frequency and amplitude of mechanical pulses and reducing energy intensity; it is equipped with a control unit; the exciters of mechanical shock pulses are made in the form of electromagnets, the cores of which are respectively fixed to the frame and the wall to be cleaned and are conjugate with one another on a plane like poles, the induction winding of the electromagnets are connected together antiparallel and are coupled to a power source and control unit - through the key element. -T about LA G Network 2206 50Hz