SU101302A1 - Apparatus for automatically matching the speeds of sections of a metal tape processing line - Google Patents

Description

Many processing lines that process coiled steel strip are machined provide for the continuity of the main process.

Such lines include: galvanic lines (tinning, galvanizing), pickling lines, spiral welding of pipes and others. All these lines are characterized by the presence in their composition of storage devices (loopers), separating the continuously operating main part of the line from the remaining sections, periodically stopped to refuel the next roll or to clean the finished product.

During the stops of the head or tail sections of the line, the operation of the main (middle) section continues either by spending the tape accumulated earlier in the looper, or under the conditions of product accumulation in the looper. After an extensive shutdown, the head or tail portion necessarily accelerates to the highest speed, exceeding the speed of the middle portion of the line. In this case, the required amount of tape is restored in the looper.

after which the speed of the regulated part of the line should be slowed down to the speed of the main (middle) part and agree with it.

The automation of the matching process is complicated by the fact that the speed of the middle section may have different values for technological reasons.

In known similar devices, the matching of the speeds of different sections of the line is performed either manually by the operator, or by using relatively complex means (tachogenerators, electric machine amplifiers, etc.).

The proposed device for automatically matching the speeds of the sections of the technological line equipped with direct current electric drives uses flat controllers controlling these drives, through the contacts of which they receive power to the relays that turn on and off the servomotors of the respective slave controllers.

Feature of the proposed

A device that simplifies the design and improves the accuracy of speed matching is

connection of the coil, each relay to the ttayuy network through the contact. traverse and electrically connected, between a contact field BQ inero. to the corresponding slave controllers in such a way that the circuit of this coil closes when the traverse controllers are located on the like contacts of the specified contact fields.

The drawing shows a process line consisting of three sections separated by looping agents and equipped with direct current electric drives. Here: A is a continuously operating section of the line; Bn B - head and tail sections of the line, periodically stopped — one for refilling the coil and the other for cleaning products; B - loopers.

The drive motors D of each separately controlled portion of the line are powered from individual generators G. The speeds of these motors are controlled by the generator voltage — by varying the resistance in the generator field winding of the generator. The control of the excitation of the generator G is carried out with the help of flat controllers / C- /, K-2 and K-3.

When the traverse of the flat controller is moved, the resistance value introduced into the excitation winding circuit of the generator changes, and this determines the speed of the line segment. Thus, the position of the crosshead of each controller determines the speed of the adjustable line segment. The same contacts of all controllers are electrically interconnected. The contacts of the same name are understood as those whose position determines the equality of the speeds of the regulated sections of the line.

The controller / C- /, which controls the speed of the middle (main) section of the line, is commanded.

The crossheads of the remaining controllers (K-2 and K-3) are connected to the coils of relays P-I and P-2, which are turned on when the speeds of the controlled and main sections of the line are equal. The operation of relays P-1 or P-2 entails a break in the contacts PI and, respectively, P of these relays of the power supply circuits of the CD- and CD-2 servomotors of the controllers.

The master servo motor of the master controller is manually controlled.

Subject invention

A device for automatically matching the speeds of sections of the processing line of a metal tape, separated by looping agents and equipped with direct current electric drives controlled by flat controllers, composed of relays receiving power through the master and slave controllers according to the positions of their contact crossbars and giving in this case the signal to stop the servomotor of the corresponding slave controller, characterized in that, in order to simplify the scheme and increase the rate matching spine, each of the relay katuschka peposredstveino connected to the mains via contact traverse and electrically connected to one another contact the floor and corresponding master slave controllers so that the coil circuit is closed when the traverse controllers of similar contacts of said contact fields.