Deflection correcting device for paper machine

Abstract

The invention discloses a deviation correction device for paper machine, especially the air-operated deviation correction device. It is made up of signal control valve, signal amplifying valve, deviation correction cylinder and deflector roll. The signal control valve includes rocking bar, valve body, slider, alignment spring, valve core seat, cone valve core, restoration spring and valve seat. The signal amplifying valve is made up of membrane, upper valve core, down valve core, restoration spring, gland bonnet, and valve body. The advantage of the invention is that: good following up performance and reliability, compacting structure, and can adapt bad environment work condition.

Description

Technical field: [0001] The invention relates to a deviation correcting device used on a paper machine, in particular to a pneumatic deviation correcting device used on a paper machine. Background technique: [0002] In the paper production process of the paper industry, the produced paper is attached to the net blanket and runs with the roller at high speed, and deviations often occur. In order to correct the deviation, multiple deviation correction devices are generally installed on a paper machine production line. The current correcting device is generally pneumatic, which is composed of some conventional pneumatic classification components such as a correcting cylinder, a guide roller, a switch value signaling valve, an air-controlled pressure regulating valve, a quick exhaust valve and a throttle valve. One end of the guide roller is connected with the correction cylinder, and the other end is hinged on the frame. The piston rod of the cylinder can be stretched to make ...

AI Technical Summary

Problems solved by technology

The deficiencies of the above-mentioned correction device are: due to the use of classification components, the volume of the whole set of devices is too large, the system follow-up and stability are poor, and the phenomenon that the swing of the correction cylinder is too large makes the correction excessive; And the structural design of the quick exhaust valve is not reasonable, which makes the pressure regulation and exhaust response of the valve sluggish, affecting its deviation correction function

Although this kind of deviation correcting device can also correct deviation, since the deviation correcting device works under harsh working conditions such as humidity, steam and high temperature in the wire section, press section, drying section and other processes of the papermaking production line, this type of Photoelectric control is obviously not suitable

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