SU1240687A1 - Belt conveyer - Google Patents

Description

The invention relates to conveyor transport, namely belt conveyors.

The aim of the invention is to increase the productivity of the conveyor by ensuring the adjustment of the tape chute and its position relative to the magnets.

FIG. 1 shows a belt conveyor, general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 is a scheme for creating a lifting and attracting force (as shown in FIG. 2); in fig. 5 - the same (according to FIG. 3); in fig. (b) a functional scheme for regulating the gap between the tape and attracting electromagnets.

The conveyor belt consists of end drums 1 and 2, stand 3 conveyors and load-carrying tape 4 with electrically conductive cables 5. At stand 3 of the conveyor, lifting 6 and attracting 7 magnets (electromagnets) are located under the load-carrying branch of tape 4. The conveyor is equipped with electronic controllers 9 connected between the gap sensors 8 and the control electrodes of the thyristor 10.

The conveyor works as follows.

A constant current is supplied from the current source to the cables 5 of the tape 4 and to the windings of the electromagnets 6 and 7 (Figs. 1, 2 and 3). The cable 5 with a current in the magnetic field of electromagnets 6 and 7, depending on the direction of the magnetic flux, is acted upon by an electromagnetic force directed upwards and lifting it relative to the electromagnet 6 (Fig. 4).

The same cable 5, located in the middle part of the tape and located above the electromagnet 7, in which the magnetic flux is directed in the opposite direction with respect to the magnetic flux of the electromagnet 6, is acted by an electromagnetic force directed downwards and attracts the cable to the electromagnet 7 (Fig . five).

The electromagnets 6 and 7 have the same design and differ from each other only in the direction of the magnetic flux, due to the polarity of the connection to the current source.

The curvature of the tape 4 in the transverse direction (Figs. 2 and 3) is provided by arranging the attracting electromagnets 7 in the middle and the lifting electromagnets 6 along the edges of the cross section of the tape.

five

On the curvilinear section of the conveyor in the longitudinal direction, the belt 4 is exerted by the tension force from the end drums I and 2, which tends to lift the belt above the conveyor bed and give it a linear shape. In order to impart a curvilinear shape to the tape 4, attracting electromagnets 7 are installed in this section on the conveyor bed in a cross section in an amount greater than the number of lifting electromagnets b (Fig. 2), i.e. the resulting vectors of lifting and attracting forces are directed downwards (Fig. 1). On the straight section of the conveyor, the weight of the load and the tape act on the belt 4.

In order to maintain the tape above the conveyor rod, lifting electromagnets 6 are installed in an amount greater than the number of attracting electromagnets 7 (Fig. 3), i.e. the resulting vectors in this area are directed upwards (Fig. 1).

Q In order to prevent the strap 4 from sticking to the attracting electromagnets 7 if the tension of the tape is weakened or a more massive load hits the tape near the electromagnets, gap sensors 8 are installed, for example capacitive, in which the capacitance varies depending on the gap between the tape and electromagnets . 6).

An electronic regulator 9, which converts the capacitance of the sensor 8 into an emf of signals, supplies a control pulse to the control electrode of the thyristor 10 connected to the power supply circuit of the electromagnet 7.

When the gap between the tape 4 and the electromagnet 7 is reduced, the thyristor 10 is locked and the current in the winding of the electromagnet 7 decreases. As a result, the attraction force acting on the tape is weakened and the tape tends to be removed from the electromagnet 7. But as the tape 4 is removed from the electromagnet 7, the thyristor 10 opens, the current in the electromagnet winding 7

0 increases and the clearance takes on the working value.

Gap sensors 8, installed on curved and straight-line sections of the conveyor, are combined into two separate groups (one on curved and straight 5 linear sections) and connected to the input of electronic regulators 9, which regulate the current in the windings of the attractive electromagnets of the respective sections. In each group, the gap sensors 8 are interconnected in parallel and the total capacity of each group is equal to the sum of the capacitances of the individual sensors.

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Claims (1)

TAPE CONVEYOR, including becoming with arcuate supports, on which magnets are mounted, covering end drums and a rubber cable located under the magnets, to the cables of which a direct current is supplied. characterized in that, in order to increase the conveyor performance by ensuring the regulation of the groove of the tape and its position relative to the magnets, the magnets located in the middle of the arcuate supports are made to attract the tape, and the arcuate supports are equipped with gap sensors located under the belt and electrically connected with them an electronic regulator to control the operation of magnets. figure 1 SU, 1240687