SU492393A1 - Method of regulating the operation of asbestos-cement molding machines - Google Patents

Description

one

The method relates to the production of asbestos cement molding machines and can be used for pipe forming and sheet forming machines.

There is a method of controlling the operation of asbestos-cement molding machines, which consists in changing the supply of asbestos-cement mixture to the bath by adjusting the speed of the drive of the bucket mixer, depending on the measured thickness of the film to be wound.

However, in a known method, a periodic change in the level of asbestos-cement mass in a ladle mixer, which causes different filling of the agitator wheel bucket by the inconsistency of the level, leads to the fact that 1 equal amount of mass is fed to the bath of the molding machine each time it is turned. Moreover, due to the considerable time spent on the regulation of the channel: the speed of the adjustable drive of the bucket mixer - the thickness of the roll film reaching 6-8 minutes, this drawback leads to a significant buildup of the system

adjusting the thickness of the film, especially after such strong disturbances as periodic plums of freshly prepared asbestos-cement mass from the Golender to the bucket mixer (every 10-12 minutes), which drastically change its level.

The circuit of the invention is to improve the quality of regulation.

This is achieved by additionally measuring the level of asbestos-cement mass in the scoop and also measuring the drive speed of the scoop stirrer according to the measured value.

The drawing shows the essence of the proposed method.

Asbestos cement molding machine contains mesh cylinder 1, bath 2 set cylinder, working cloth 3, molding rolling pin 4, rollable pipe 5, film thickness gauge 6, regulator 7, adjustable drive 6, bucket agitator 9, scoop wheel 10, receiving box 11, the chute 12, the level gauge 13 and the correction unit 14.

The asbestos cement film, which is formed on the mesh cylinder 1 when it is rotated in the bath 2 filled with asbestos cement slurry, is removed by the felt 3 and is transferred to the rock 4 for winding the pipe 5 during its movement. The thickness of the film being wound is controlled by thickness 6, which is connected to the regulator inlet 7

At the same time, the level of the ac-to-whole cement mass in the ladle mixer 9 monitored simultaneously by means of the level gauge 13 is fed to the input of the correction unit 1, in which the ortho transforms the correction signal to the corresponding level change. regulator 7.;

Regulator on the basis of applicants; on its input signals of the thickness of the film being wound and the mass level in fulfills a common control signal for a change in the speed of an adjustable bucket drive

agitators 9, rotating O h “} 11 ali1 ki-10, and, consequently, changing the asbestos-cement mass in the receiving box 11 and then along the gutter 12 g in panna 2 of the mesh cylinder 1 in the direction of the film thickness.

Subject of the image

A method of adjusting the work of asbestos-cement molding machines, which consists in changing the flow of asbestos-cement mass to the bath by adjusting the drive speed of the bucket mixer depending on the measured thickness of the roll film, in order to improve the quality of the adjustment, the level of the asbestos cement mass is additionally measured in a ladle. the mixer and the PP measured value adjust the drive speed of the bucket mixer.