Adjustable accurate-position scraper device

Abstract

The invention discloses a scraper device used on a pressure disk-type filter in a papermaking alkali recovery system. In the device, a mechanism used for controlling the movement of a scraper relative to a filter disk according to the liquid level comprises a motor, an axial speed reducer, a connecting rod system and scraper holder rockers, wherein the motor is controlled by the liquid level; the axial speed reducer is driven by the motor; the connecting rod system is connected between the output end of the axial speed reducer and a driving rocker of scraper holders; the driving rocker of the scraper holders is connected with a scraper rocker by a hinge; and the driving rocker of the scraper holders and the scraper holder rockers are assembled on the axle of the scraper holders and are in key connection on the axle of the scraper holders. The driving rocker of the scraper holders swings to drive the scraper holders and the scraper holder rocker connected on the axle at one side to rotate simultaneously, so as to push an adjuster as well as a left-handed screw bar and a right-handed screw bar that are connected at the two ends of the adjuster to move; and then the other scraper holder rocker connected on the axle at the other side is driven to rotate, so as to realize the synchronous movement of the scraper holders at the two sides of the filter disk.

Description

technical field [0001] The invention relates to a scraper device on a pressure disc filter used in papermaking alkali recovery system equipment, comprising: scrapers located on both sides of the filter disc, a scraper holder for fixing the scraper, and a scraper fixing device arranged on the scraper holder. It is used to fix the mechanism of the scraper holder, and the mechanism to control the movement of the scraper relative to the filter plate according to the liquid level. Background technique [0002] In recent years, due to the advantages of large filtration area, high filtration precision, small footprint, convenient maintenance, and simple operation, the pressure disc filter has been rapidly popularized and applied in the market, and has provided a great support for the recovery of papermaking alkali and other micro industries in my country. The development of filtration technology and the improvement of paper quality have made no small contribution. For example, the ...

AI Technical Summary

Problems solved by technology

The deficiency of the existing technology is that when the hydraulic cylinder is used as the driving source of the scraper, certain situations in the work will cause the scraper to move too much and cause damage to the equipment; on the other hand, in order to make the equipment have a certain corrosion resistance, stainless steel is often used as a The material of the spring steel wire, due to the low hardness and poor elasticity of the stainless steel material itself, coupled with the influence of temperature and the deposition of the medium on the surface of the spring steel wire, has caused a decline in the performance of the spring; thirdly, due to the complex movement structure of the mechanism , and due to welding structure manufacturing errors and welding deformation, the cumulative error of the scraper driving device is very large; it is difficult to achieve the same elastic coefficient for a large number of springs, and the density of the pre-coated layer encountered when the scraper is working is not exactly the same. It will cause the force back distance of each scraper to be different, so that the distance between each scraper and the surface of the filter disc will vary greatly, and the required distance cannot be guaranteed at all. What's more, the accuracy and distance of the scraper when it advances cannot be guaranteed. The filter cloth is often scratched, resulting in a large maintenance burden, which greatly shortens the normal service life of the equipment

In the currently used scraper device, holes and chamfers need to be drilled on the scraper body, and then fixed on the scraper holder with screws, which increases the volume of the scraper, complicates the loading and unloading procedures, and increases the cost of use

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