JPH0317523B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multipurpose plate-like element for filtration or separation, which is used for various types of filtration or particle separation, and also as a fluid nozzle.

[Conventional technology]

Conventionally, this type of plate-like element that is generally known generally has a structure with a large number of punched holes or a structure with a mesh or lattice-like filter hole. Porous plate-like elements using ceramics have been developed.

[Problem that the invention seeks to solve]

However, in the case of the former, since the filtration holes are pointwise, the filtration area is small, and therefore the clogging phenomenon is large, which is a disadvantage, and this tendency increases as the filtration particle size becomes smaller. It was hot.

In the latter case, the porous structure forces steric filtration even if it is a plate-like structure, and impermeable foreign matter grows in the porous structure as a blockage, making it unavoidable that the filtration rate decreases. Therefore, there is a problem in that foreign matter within the porous structure must be completely removed by frequent cleaning or the like.

In order to solve these problems, the inventor filed a patent application in 1983.
In No. 95458, a wire rod is used, which is wound flat in a spiral shape, and a spiral slit is formed between the peripheral edges of adjacent wire rods to maximize the filtration or separation processing area as a so-called linear processing hole. However, we have proposed a plate-like element for filtration or separation, which is designed to improve the filtration or separation effect.

However, since such plate-like elements use wire rods, the wire rods must be processed and formed in advance with high precision, and the wire rods are wound in a spiral shape to create high-precision slits between the peripheries of adjacent wire rods. There was a problem in that it required high-precision processing technology, such as the need to form holes.

[Means for solving problems]

This invention was made by focusing on the points mentioned above, and without using a wire rod whose cross-sectional shape is pre-processed to the desired shape, one surface, that is, the front or back surface of a planar main plate having a flat and desired thickness is swirled. The above-mentioned problem is solved by processing the main plate into a flat plate with microscopic spiral slits and fixing the flat main plate with the slits on one side of a flat plate-like substrate having a porous structure.

[Effect]

Since the shape is flat, the fluid to be treated such as liquid or gas is uniformly filtered or separated throughout the entire body without being biased against the flow, and the holes for filtration or separation are Since the slit holes are spiral, so-called linear processing holes can be formed and the filtration flow rate can be increased.

Further, since residues such as filter scum can be removed by simple means such as backwashing or scratching, processing operations can be carried out smoothly.

Furthermore, by discharging a desired fluid along the slit hole, it is possible to spray water or to discharge desired bubbles into the liquid.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

1 shows a planar main plate having a desired external shape with a flat surface P, and spiral slit holes 2 are formed by cutting with high precision at a constant pitch from the center toward the outer periphery. And this slit hole 2 is the second
As shown in the cross-sectional shape of the figure, the cross-section has a triangular shape A, and a triangular portion 3a having a sharp cross-section is formed between adjacent slit holes 2.

In addition to the above-mentioned embodiments, the cross-sectional shape of this slit hole 2 is a square shape B in the case of a as shown in FIG.
In addition, the cross-sectional shape between adjacent slit holes 2 also forms an angular part 3b, and in the case of b, the cross-sectional shape has a rounded shape C, and the cross-sectional shape between adjacent slit holes 2 is a circular bulge. The cross-sectional shape of the slit hole 2 may have any shape, such as forming a protrusion 3c.
Reference numeral 4 indicates a planar substrate with a flat surface, and has a porous structure with a large number of radial holes 5 formed therein. 6
is a locking groove that engages with the tip of the triangular portion 3a formed with the formation of the slit hole 2 of the planar main plate 1, and is discontinuously bored in the planar substrate 4 to ensure the accuracy of the spiral slit hole 2. The planar main plate 1 is bored in the planar substrate 4 in the same way as the slit holes 2 so that it can be held well, and the planar main plate 1 is attached to the planar substrate 4 by gluing, welding, or by fixing with screws 7 as shown. It is firmly fixed.

However, the locking groove 6 may not be formed if necessary.

The width of the illustrated slit hole 2 has an accuracy of not only several microns to several tens of microns, but also one micron or less.

The planar main plate 1 and the planar substrate 4 can be made of not only metal but also other desired materials such as plastics or ceramics.

The action will be explained based on the above structure.

In the state shown in FIG. 2, the planar main plate 1 with the spiral slit holes 2 facing the primary side, the outer periphery of the main plate 1 or the substrate 4 is fixed to a desired conduit, etc., and the liquid or gas to be treated is Pass the fluid in the direction of the arrow.

From the fluid to be filtered or separated, residues larger than the width of the slit hole 2 are removed, and particles smaller than the width of the slit hole 2 are removed. The containing fluid can be passed through and subjected to so-called filtration or separation.

The filtered or separated residue is deposited on the flat surface P of the main plate 1, but it is backwashed by fluid from the opposite direction (secondary side) or scraped onto the flat surface P by a scraper (not shown). Since it can be easily and reliably wiped, it is possible to perform the desired filtration or separation continuously.

However, if a spraying fluid such as water or air is supplied from the opposite side as the fluid to be treated, the slit hole 2
This allows it to be dispersed along a spiral shape to perform water sprinkling or foaming in the liquid.

Although one embodiment of the present invention has been described above, the above-mentioned planar substrate 4 may be of any desired frame structure (not shown), or may be a flat plate with a large number of holes, a lattice-like net plate, or a slatted plate. Furthermore, the locking groove 6 may be a groove that can engage with the shape of the spirally formed slit hole 2, depending on the shape of the slit hole 2, such as a round, oval, or trapezoidal cross-section. Of course, it can be formed as

It should be noted that the planar main plate 1 and the planar substrate 4 do not need to be perfectly horizontal surfaces, and the concept of the present invention also includes cases where they are slightly curved, such as concave or convex surfaces.

〔Effect of the invention〕

According to this invention, the slit holes can be obtained in a spiral shape with a desired pitch by cutting the planar main plate, so not only is the manufacturing process extremely simple, but the slit holes can also be formed into so-called linear processing holes for filtration or filtration. Not only can the throughput of separation etc. be significantly increased, but also a completely horizontal surface as well as a slightly curved slit hole can be obtained, so the usage can be expanded and it can be used as a filtration or separation element as a permanent filter instead of a disposable paper filter. It is widely interchangeable and can be used for many purposes.

Furthermore, it can also be used as a nozzle for water sprinkling and foaming.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway plan view showing an embodiment of a multipurpose plate-like element for filtration or separation according to the present invention;
FIG. 2 is an enlarged sectional view of the central portion of the same as above, and FIGS. 3a and 3b are sectional explanatory views showing two other different shapes of the slit hole. DESCRIPTION OF SYMBOLS 1... Planar main plate, 2... Spiral slit hole, 3a... Triangular part with pointed cross section, 3b... Corner part, 3c... Circular bulge, 4... Planar substrate, 5
... Hole, 6 ... Locking groove, A ... Triangular cross section, B
……Square-shaped in cross section, C…Ratsupa-shaped in cross-section.

Claims (1)

[Claims] 1. A planar main plate with spiral slit holes,
A multipurpose plate-like element for filtration or separation, which is fixed to one side of a planar substrate with a porous structure. 2. The multipurpose plate-like element for filtration or separation according to claim 1, wherein the slits are formed with a triangular cross section.