SU605690A1 - Device for automatic metering of metal at pouring - Google Patents

Description

The drawing shows a device for automatic dosing of metal when zapivka, a general view.

The device contains a transfer bath 1 for liquid metal, a metal pipeline 2, an electromagnetic pump with a three-phase one-way linear inductor 3, a form 4, a contact datchik 5 metal levels in the form, a regulator 6 voltage on the inductor of the pump and an electric circuit for supplying the metal to the form.

The electrical circuit consists of a contactor 7 (P1), supplying voltage to the inductor 3, parallel to the coil of which two relays 8, 9 of time PB1 and

PB2 with the settings of the upper and lower limits of the time to fill the mold 4 with metal. Intermediate relays 10, 11 (P2 and P3) are used to send a signal to decrease or increase the voltage on the pump inductor 3. Relay 12 time RVZ serves to set the duration of the signal action for decreasing or increasing the voltage on the inductor 3 of the pump when the actual priming time differs from the set time (relay settings 8, 9) of time PB1 and PB2.

The contact sensor 5 metal level in the form 4 serves to close the supply circuit of the coil of the intermediate relay 13 (P4), which, having triggered, returns the circuit to its initial state. In the proposed device it is possible to use any type of electromagnetic pump.

The device works as follows.

Button 14 (KN) closes the supply circuit of the coil of contactor 7 (P1), which supplies the voltage to a three-phase linear one-way inductor 3, supplying metal to the form 4, and time relays 8, 9 (PB1 and PB2) thereby thereby; the signal to count fill time. Moreover, time relay 8 (PB1) has a lower setpoint, and relay 9 (PB2) has an upper fill time limit.

If the actual casting time is within the limits of the relay settings (8.9) of time, PB1 and PB2, then when the form is filled with metal, the contact sensor 5 will close the power supply circuit. the coil of the intermediate relay 13 (P4), which by its normally closed contact will break the power supply circuit of the coil of the contactor 7 (P1) and turn off the power supply of the three-phase one-way inductor 3. The priming is completed.

If the actual priming time is less than the lower priming time limit (setpoint of relay 8 of time PB1), contact sensor 5 will close the power supply circuit of the intermediate relay 13 (P4) before relay 8 of time (PB1) opens its HOjiManb closed contact in the intermediate relay 1O circuit ( P2).

Relay 13 (P4), triggered by one of its normally closed contacts, breaks the power supply circuit of the coil of contactor 7 (P1), which turns OFF the power supply of the three-phase one-way linear inductor 3, and another, normally open contact, closes the power supply circuit of the intermediate relay coil 10 (P1), which , having triggered one normally open Mksv1tak), will close the power supply circuit of the coil of the time relay 12 (RVZ), and another normally open contact will give a signal to reduce the voltage on a three-phase one-way linear inductor 3 pumps to a certain Inu, whose value depends on the relay 12 time-setting (EEO).

Relay 12 time (RVZ), triggered by its normally closed contact, breaks the power supply to the coil of intermediate relay 10 (P2), which will return the circuit to its original state. The next priming will be performed when the voltage on the pump inductor 3 is less than the previous one, therefore, the priming time will increase and will lie within the relay time settings 8, 9 (PB1 and PB2).

If the actual priming time is longer than the upper priming time limit (time 9 relay setting PB2), then the PB2 time relay with its normally open contact closes the power supply circuit of the intermediate relay 11 (RE) coil earlier than the intermediate relay 13 (P4) breaks its normally closed contact power circuit of relay 11 (RZ).

Relay 11 (P3), triggered by one of its normally open contacts, will close the power supply circuit of the coil of the time relay 12 (RVZ), and another normally open contact will give a signal to increase the voltage on a three-phase one-way linear inductor. 3 pumps for a certain amount, the value of which depends on the setting of time relay 12 (RVZ).

Relay 12 time (RVZ), triggered by its normally closed contact, will break the power supply circuit of the coil of intermediate relay 11 (RZ), returning the circuit to its initial state.

The contact sensor 5 after filling the form 4 with metal will close the supply circuit of the coil of intermediate relay 13 (P4), which by its normally closed jjaaopt contact supplies the supply circuit of the coil of the contactor 7 (F1) by disconnecting the power supply of the three-phase single-ended one