SU874823A1 - Device for stabilizing the thickness of mica-plastic material at the outlet of manufacturing machine - Google Patents

Description

(54) DEVICE FOR STABILIZATION OF THICKNESS OF THE SLYuDOPLAST AT THE OUTPUT OF THE MICROPLASTELING MACHINE The invention relates to the arbitrariness of mica in the pulp and paper industry and can be used to stabilize the mica layer at the output of the mica plastering machine. A device for automatic stabilization of micaceous thickness is known, which contains a concentration sensor of mica pulp, a flow sensor of mica pulp connected through a multiplication unit to one of the inputs of a mica flow control regulator, the output of which is connected to an actuator connected to a thickness gauge of molded mica, which is connected through a pulse link and an adjusting regulator torus with the second input of the mica flow controller, grid speed sensor connected through the amplifying unit with the second input of the mica flow controller 1. There is no It is a known device that does not take into account the dependence of the Leverage function on the speed of movement of the grid of the mica-dividing machine, as well as the change in the spectral density function of mica as the mica pulp is pumped from the metal pool to the inlet, which reduces the thickness stability of the mica obtained. . The purpose of the invention is to increase the stabilization of the thickness. This goal is achieved by the fact that the device has a block for calculating the parameters of the pulse link, while the thickness sensors of the mica layer and grid speed are additionally connected to the corresponding inputs of the block for calculating the parameters of the pulse link, the output of which is connected to the second input of the pulse link and a corrective controller, the output of which is connected to the second input of the corrective controller, and a third input to the input of the multiplication unit. The drawing shows a structural diagram of the proposed device. The device contains sensor 1 of mica pulp concentration and flow sensor 2. mica slurry connected through multiplication unit 3 to one of the inputs of flow regulator 4 mica, the output of which is connected to the executive mechanism 5. The thickness gauge b of the molded mica is connected through a pulse link 7 and a correction regulator 8 to the second input of the regulator 4 the mica consumption, the grid speed sensor 9 is connected to the same input through the amplifying block 10. Sensors 6 and 9 are additionally connected to the corresponding (corresponding to the inputs of the block 11 for calculating parameters of the pulsed Even, the output of which is connected to the pulse 7 and two odes unit 12 for calculating the correction parameters of the regulator, whose output is connected to the second input unit 8.Trety input unit 12 is connected to the output of the multiplier 3.

Mica plastics machine at the exit content | t pool 13, the inlet device 14, the grid 15 and the drum 16.

Mica on the pulp from the working mixing basin 13 enters the inlet device 14, then to the grid 15, is dehydrated and dried. The molded and dried micodoplast is wound on a drum 16.

The operation of the device is as follows.

In order to stabilize the thickness of the molded mica, first the mica flow from the working mixing basin 13 to the air inlet device 14 is regulated. For this, the mica flow signal (the product of mica slurry and concentration) from the block is sent;; multiplying 3 enters the PI controller 4, which with the help of the executor mechanism 5 changes the consumption of mica pulp and thereby stabilizes the consumption of mica.

In order to compensate for the disturbance that occurs due to a change in the speed of the grid, the signal from the sensor 9 of the speed of the grid, through the amplifying unit 10, corrects the task of mica consumption when the speed of the grid changes. If the thickness of the molded plastic is deviating from the task to compensate for other disturbances, the signal from the thickness sensor 6 through the pulse link 7 and the PID regulator B adjusts the task for the consumption of mica. The signal from the sensors of thickness of mica loplast 6, grid speed 9, as well as multiplier 3 is fed to the calculation unit

11 of the correcting PID controller 8, providing a change in the parameters of the correction PID controller depending on these signals. In addition, signals from sensors 6 of thickness and 9 grid speeds arrive at block 7 for calculating the impulse link, ensuring the change in the parameters of the impulse link depending on these signals.

Claims (1)

1. Development and testing in industrial conditions of an automatic system of stabilization of micaceous thickness. Report on the topic 052.4.08.508.L., Giproninemetallud, 1975, p.36.