SU559689A1 - The process control system of filling the baking oven hearth in the lines for the production of hearth bakery products - Google Patents

Description

The bottom bakery products include a miogomotor drive 1 with a thyristor voltage converter (for direct current motors), low voltage and frequency (for alternating current motors), from which 2, 3, 4 direct current or alternating current motors are fed. equipment requiring speed control (dough divider, intermediate conveyor, continuous handler and other machines). The speed of the dough processing equipment varies in proportion to the speed of the furnace conveyor by introducing a control signal at the input of the thyristor converter, which is proportional to the difference between the tachogenerators 5 and 6 of the furnace conveyor drive and the divider.

In the device for comparing the speeds of the furnace conveyor drives and the dough divider, a potentiometer 7 is turned on at the output of the tacho generator 5 of the conveyor conveyor drive, which has three leads for incrementally varying the proportionality coefficient between the speed of the oven conveyor and the dough divider when the number of cradles that have slowed down the divider speed increases with a decrease in the number of cradle loads. The counter-iBbi input of the potentiometer 7 of the tachogenerator 5 of the conveyor drive of the furnace is switched on the output of the potentiometer 8, the input of which is connected to the output of the tachogenerator 6 of the tester drive. Potentiometer 8 serves to smoothly change the ratio of the speeds of the drive and control the step size between the dough pieces on the hearth of the furnace when they change sizes or when switching from one type of product to another.

The adjustment of the proofing time is carried out by changing the number of loadable cradles of the proofing cabinet by means of a device for adjusting the proofing time, when one of the closing contacts of which (not shown in the drawings) is closed, the transfer cradle passes without loading, and when it opens, it stops to load. Two other contacts 9 and 10 of this device are included in the intermediate relay circuit. The opening contact 9 is connected to the intermediate relay circuit 11, and the closing contact 10 is connected to the circuit relay relay 12. Relay 11 one of its closing contacts includes a circuit corresponding to the accelerator mode of the potentiometer tester 7. Relay 12 includes one of its closing contacts the slow motion mode of the divider of the potentiometer 7. When the relays 11 and 12 are de-energized with their opening contacts, the circuit is closed, which corresponds to the steady-state mode.

Intermediate relay 11 receives power when it receives signals about stopping the cradle of the proof: ki under loading, about the absence of dough pieces in the penultimate cradle before the position of unloading of the proof and sigal about the fixed position of the cradle. The signal for stopping the cradle of the proofing cabinet for loading is given when the circuit is closed

opening contact 9 of the device for adjusting the time for proofing. The signal about the absence of dough pieces in the penultimate cradle before the unloading position of the proofing device is given with the closed disconnecting switch.

contact 13 of the intermediate relay 14, the output sensor 15 of the presence of dough pieces in the cradles of the cabinet, for example, a contactless switch or a capacitive sensor, installed at a distance of

between the cradles from the place of unloading. The signal about the fixed position of the cradle, allowing control of the presence of dough pieces in the cradles of the cabinet, is given when the closing contact 16 is closed, the intermediate relay 17 connected to the output of the contact switch 18 of the proofing conveyor. The moment of operation of the contactless switch 18 corresponds to the fixed position of the proofing platform against the sensor 15.

Through the closed contacts 9, 13, 16, the intermediate relay 11 is energized, which closes the closing 1 pin 19, which blocks the contacts 9, 13, 16, closes the closing contact 20 in the circuit corresponding to the accelerated mode of the divider of the potentiometer 7, opens the opening contact 21 in the circuit, corresponding to the steady state mode 7, closes the closing contact 22 in the time relay circuit 23. Closing the contact 20 leads to an increase in the signal taken from the output of potentiometer 7, thereby increasing the control signal thyristor interface converter. The speed and productivity of dough processing equipment doubles.

By accumulating the number of workpieces stacked at the same time in the cradle of the proofing device, a coaxial switch 24 is activated, the intermediate relay 25 is powered, which gives a signal to turn off the proofing motor, closes the closing contact 26 in the time relay 23 and the closing contact 27

intermediate relay circuit 28. Time relay 23 receives power, closes the closing contact 29, locks and, with a time delay, closes the closing contact 30 in the circuit of intermediate relay 28.

The intermediate relay 28 when the first signal from the relay 25 does not operate, since the contact 30 of the time relay 23 remains open, due to the fact that the time delay of the relay 23 is set somewhat

more time to move the cradle shchkafa proofing at the same time. The next series of blanks is formed on the auto paver. When a second signal is received from the relay 25, the power supply circuit of the relay 28 closes, since contact 30

already closed. Upon receiving power, relay 28 opens the opening circuit with contact 31 of the power supply circuit of the relay AND ii with the firing contact 32 - the power supply circuit of time relay 23. Contact 2and opens, contact 2 closes, and the system goes into steady state operation.

Intermediate relay 12 is powered when idle the signals to pass the cradle of the closet cabinet without loading, about the presence of dough pieces in the penultimate cradle before noiiiUnou unloading the proofing cabinet and signaling the fixed position of the cradle.

The signal on the pass of the cradle of the proofing cabinet is applied when the closure of the contact 10 of the device for adjusting the time of the proofing is closed. A signal about the presence of dough blanks in the penultimate cradle before the unloading position is given by closing the closing contact 33 of the intermediate relay 14. If there are dough blanks in the above-mentioned cradle of the cabinet, the proximity switch 15 is activated and receives the intermediate relay 14 pin.

The signal about the fixed position of the cradle of the proofing cabinet is supplied when the closure and closure of the contact 34 of the intermediate relay 17. The contacts of the closed relay 10, 33, 34 receive the power supply of the intermediate relay 12, which closes the closure contact 35, which blocks the contacts 10, 33, 34, closes The short-circuit contact 36 in the potentiometer circuit 7 opens the opening contact 37 and closes the contact 38 in the circuit of the non-contact switch GE. The closure of pin 36 reduces the signal taken from the output of potentiometer 7, thereby reducing the control signal of the thyristor converter. The saxfity and productivity of the dough equipment is halved.

After the TecTOEibix half of the blanks placed in the cradle of the proofing cabinet arrives at the auto paver, the proximity switch 39 is activated and supplies power to the intermediate relay 40, which activates the conveyor start control

cabinet paccToiiiui. The cabinet of the proofing cabinet moves u.i or pitch, and during the movement it is determined: throwing the cradle and unloading dough pieces on the bottom of the furnace. When all the billets that are simultaneously placed in the cradle of the proofing cabinet are delivered to the auto-paver, the proximity switch operates 24, the intermediate relay 25 is energized, the break contact 41 is energized

the power circuit of relay 12 is open. The system goes to work in steady state. The control system of the filling process of the baking oven hearth, in comparison with the known, increases the productivity of the oven for

the expense of full filling of the oven and the absence of gaps in rows in transient modes of adjusting the time of proofing and baking time taking place in a known system increases the life of the dough separator

equipment, provides automatic stabilization of the filling of the ribbon feed with a 1nnel baking oven.

Claims (1)

Invention Formula The bakery hearth filling process control system was treated in the hearth bakery production lines, containing a device for adjusting the time for proofing, a circuit for controlling the actuators of the dividing equipment, and an automatic stop for the drive for the conveyor of the proofing cabinet. tunnel baking oven dough pieces, increasing the productivity of the oven, ensuring continuous operation of t storazdelochnogo equipment and increase its lifetime, it is provided with ustroystvo.m comparing the speeds of the conveyor of the furnace and the dividing equipment, a multi-motor electric drive with a variable coefficient of proportionality and a common power thyristor converter, with In this way, the input of the latter is connected to a speed comparison device. :::: d.: g. 5eesh-. Ml i i g : google / ig.2