Single-sided hollow stainless steel welding filtering plate

Abstract

Provided is a single-sided hollow stainless steel welding filtering plate. A supporting layer is fixed between a stainless steel forming bottom plate and a stainless steel wire gauze. The outer edges of the stainless steel forming bottom plate and the stainless steel wire gauze are welded and fixed. A supporting ring is provided with flow guide grooves at intervals, installed between the stainless steel forming bottom plate and the stainless steel wire gauze and located in an inner ring of the supporting layer. Through liquid outlets are formed in the middles of the stainless steel forming bottom plate, the stainless steel wire gauze and the supporting ring. The single-sided hollow stainless steel welding filtering plate has the advantages that the whole outer edges of the stainless steel forming bottom plate and the stainless steel wire gauze are welded to form a single-sided filtering whole; during backward flushing, the edges are firmly welded, the outer edge of the filtering plate can not be torn off, and filtered liquid quality is ensured; the stainless steel wire gauze is not prone to impurity adhesion or blockage and is easy to flush; gaps of the stainless steel wire gauze with an upper open face are uniform and consistent, liquid leakage prevention is ensured through the stainless steel forming bottom plate, and the single-sided hollow stainless steel welding filtering plate is open in upper face, closed in lower face and high in strength.

Description

technical field [0001] The invention belongs to a liquid filter element, in particular to a single-sided hollow stainless steel welded filter plate which is suitable for filtering high-viscosity and high-temperature liquids and has extremely strong pressure resistance and anti-backwashing capabilities. Background technique [0002] There are many kinds of stainless steel single-sided filter plates widely used in the market now, and their structures are all spot-welded with the outer edge of stainless steel wire mesh and the stainless steel bottom plate, sealed with sealing strips or welded by lead welding. The disadvantages of the single-sided filter plates with the above structure are: When the filter plate needs to be backwashed, the outer edge of the filter plate is torn and damaged due to insufficient edge welding strength or masking strength, making it impossible to filter, causing quality problems in the filtered liquid, requiring frequent replacement, resulting in a la...

AI Technical Summary

Problems solved by technology

[0002] There are many kinds of stainless steel single-sided filter plates widely used in the market now, and their structures are all spot-welded with the outer edge of stainless steel wire mesh and the stainless steel bottom plate, sealed with sealing strips or welded by lead welding. The disadvantages of the single-sided filter plates with the above structure are: When the filter plate needs to be backwashed, the outer edge of the filter plate is torn and damaged due to insufficient edge welding strength or masking strength, making it impossible to filter, causing quality problems in the filtered liquid, requiring frequent replacement, resulting in a large amount of stainless steel material waste

The filter plate of this structure overcomes the open welding problem of the stainless steel filter plate, but after many years of use, there are the following problems: 1. It is not resistant to high temperature, and it is not suitable for filtering high-temperature liquids; 2. When backwashing, water from the liquid collection chamber Pressure is applied to the direction of the upper and lower filter plates from the inside, and the support column is broken due to its low material strength; 3. When the operating pressure between the liquid collection chamber and the lower filter plate is too high, the liquid collection chamber is easily deformed under pressure, resulting in the failure of the liquid collection chamber. Blockage, deformation of the filter layer, change of filter holes, easy to block; 4. The relative pore size of the lower filter plate is relatively small, not non-porous, and the pore size does not change much when pre-coated with diatomaceous earth. The pore size of the filter plate changes during filtration, and the filtration accuracy is unstable

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