SU29527A1 - Solenoid drive for oil circuit breakers - Google Patents

Description

The present invention consists in the construction of a solenoid drive for oil switches, in which the core of the solenoid induces compression or expansion of the closing spring in several of its strokes.

In FIG. 1 shows a general view of the drive with a partial cut; FIG. 2 is a top view of a leverage system; FIG. 3 is a side view of one of these levers; FIG. 4 is a general drive wiring diagram.

The core of the solenoid, which is collapsible by the spring 22 in the idle position, is connected by a cable J6 to a disk 77 seated freely on the shaft 20 and fitted with a dog J8 coupled to the ratchet wheel J3 rigidly fixed on the shaft 20; On the shaft 20, in addition, a washer M is installed, which interacts with the lever JO, which is seated on the shaft 27 and through the levers 7, 7 connected with the arms 77, which serve to compress the spring J of the drive. J4 washer. can be rotated independently of the shaft 20 at a certain angle by the action of the spring 75 (counterclockwise). The above-mentioned disc 77 is also provided with a spring 72, which tends to turn it in the direction opposite to the direction of rotation from the cable 76. The oil circuit breaker is connected to a tumbler 2, equipped with a recess in the lower part, in which the ball 4 is placed, coupling the tumbler 2 with a rack 3 and holding the thu, regardless of the compression of the spring 7, in its upper position. Thus, the lowering of the pull-rod to activate the oil switch is possible only when the core 6 of the auxiliary solenoid moves the slider 5 upward to align the ball cut-out of this slider with the hole in the rack 3.

The number of strokes of the solenoid or, what is the same, its inclusions, necessary for the full compression of the spring /, may be different; in this case, the drive is designed for three inclusions. In order to increase the efficiency of the drive, the washer 74 is designed so that for each next stroke the spring 7 is compressed by a smaller amount than the previous turn, and thus the solenoid performs the same work every time it is turned on.

The oil switch is turned on as follows. When the activation button K is pressed (Fig. 4), the intermediate relay P operates, the current circuit of which passes through the disk KOHxakT D and through the solenoid ruptured during each of its positioned contact C {this contact is arranged so that it closes in the upper position of the core and opens bottom). The relay P closes the circuit of the solenoid A and its core, by means of the cable 16, turns the disk 11, which sits freely on the shaft 20, connected by means of the pawl 18 to the ratchet wheel 75, which at the same time turns 120 °; in this position, the ratchet wheel 13 is stopped by the dog 19.

Since the wheel 13 is rigidly connected to the shaft 20, the washer 14 also rotates by an angle of approximately 120 ° and turns the lever 10 through a certain angle, and with it the levers 7, which compress the spring izt 17. When the solenoid is retracted, the current in the coil of the solenoid is interrupted at contact C (Fig. 4), and the spring 22 pulls the core back up; the disk 11 also returns, thanks to the spring 12 (Fig. 2), to its original position and the dog 18 hooks on the next tooth of the ratchet 13. Then the process, similar to that described, is repeated two more times. Further inclusions (more than three) of the solenoid are eliminated due to the fact that the disk contact 11 opens the circuit of the intermediate relay P. After the third switching on, the levers and the disks occupy the position indicated in FIG. 1 dotted line. At the same time, the auxiliary solenoid circuit closes, the core 6 of which moves upwards and sets the slider 5 to a position in which the ball 4 allows it to freely enter its recess. In this case, the cup 2 moves downwards by the action of the spring 7 and turns on the oil switch, while opening the auxiliary solenoid circuit at the same time. As it moves downward, the glass cover 2 pushes against the spring 23 and tends to move

slider 5 together with the core 6 down. However, this will be prevented by the ball 4. This position will take place until about the ball 4 will install the upper ball notch of the cup 2, after which the ball 4 again connects the cup 2 to the stand 3, and the core b together with the slider 5 will take the original position. When the oil switch is turned on, the protrusion 9 at the last moment rests on the roller 8 (Fig. 2) and moves it downward, as a result of which the lever / Lift up and the dial "7 slightly rotates counterclockwise, as described above.

When turned off, the relay circuit is closed again (with the button or from the maximum relay), the core 6 is pulled up again and sets the slider 5 so that ball 4 can be pressed into its recess. In this case, the cup 2, and with it the ha, is released, and the oil switch is turned off. At this moment, the levers 7 and 10 again occupy the initial position shown in FIG. 1. Since the speed of the core does not play a significant role in this attack, it is possible to apply alternating current to power the solenoid, using, for example, the principle of magneto-fugi.

The subject matter of the invention.

A solenoid drive for oil switches, in which the solenoid core compresses or stretches an actuating spring in several of its strokes, characterized in that the clamp 7-1 connecting the ratchet wheel, which is rotated by the core, with a system of levers acting on the spring , made in such a form that for each subsequent stroke of the core, the spring is compressed or stretched to a smaller value than in the previous run, in order to increase the efficiency factor of the drive.

Phi