JPH0728896Y2 - Structure of filter fastening part of filter tube - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a filter cylinder used for filtering various types of water such as industrial water or for filtering or concentrating various suspended water such as sludge water. The present invention relates to a structure for a fastening part of an open end of a tubular filter to a tubular body in which a tubular filter is mounted on an outer peripheral surface of the tubular body having a large number of small holes.

(Prior Art) Conventionally, a spacer (c) such as a cylindrical net is attached to the outer peripheral surface of a cylindrical body (a) having a large number of small holes (b) ... As a filter fastening portion structure in a filter cylinder having a cylindrical filter (d) such as a filter cloth attached to the outside thereof, a fastening band (e) is provided on the outer peripheral surface of the open end portion of the filter (d) as shown in FIG. ), And the open end portion of the filter (d) as shown in FIG. 7, the open end portion of the filter (d) being sealed with a liquid-impermeable tubular packing (f) such as rubber. It is known that the product is wrapped in a state where it is not exposed, and then the packing (f) is wrapped around the outer circumferential surface of the packing bands (e) and (e ′) and tightened.

(Problems to be solved by the invention) Generally, in a filtration process, a large number of filter tubes are mounted adjacent to each other in one treatment tank, and a stock solution (for example, sludge water) is pumped to the outer side of each filter tube. While the filter residue is captured by the filter (d) of each filter cylinder, the filtrate is continuously discharged from the small holes (b) of each filter cylinder through the cylinder body (a) to the outside of the tank. After the filtration, as a filter residue removing step, pressurized air is fed back into each filter cylinder to remove the filter residue attached to the outer surface of each filter (d) and discharge it to the outside of the tank.

However, in the former filter fastening portion structure, as shown in FIG. 6, the open end of the filter (d) is exposed from the fastening band (e) and the space between the fastening band (e) and the tube body (a) is exposed. Since a small gap is left, a small amount of filtration is performed from the small gap in the filtration step.
The filter cake (g) adheres to the open end of the filter (d).
Moreover, in the filter residue peeling step, the pressurized air that is sent backward does not flow backward from the fastening portion of the fastening band (e) to the outside, so the filter residue (g) attached to the open end of the filter (d) (g) ) Will remain without being peeled off.

On the other hand, as shown in FIG. 7, in the latter filter fastening part structure, the filter d is not attached at the open end of the filter (d), but the middle part of the filter is closed by fastening the fastening band (e). The end of the packing (f) floats up, and a bite gap is created between the floating part and the filter (d),
Filter residue (g) is attached to the gap in the filtration step,
Moreover, in the filter residue peeling step, the filter residue attached to the gap is only subjected to the weak peeling pressure of the pressurized air sent in the reverse direction, and thus is hardly peeled and remains.

In any of the conventional structures described above, the filter residue that remains unpeeled grows as the filtration is repeated, and combines with the residual filter residue of the adjacent filter cylinder to form a stronger filter cake group. , Gradually covering the outer surface of the filter, and this tendency is more remarkable in the case of a viscous filter cake, and the filter cake thus grown is separated from the filter external surface when the compressed air is sent back. However, it does not come off and remains on the outside of the filter, thereby significantly reducing the filtration capacity of the filter cylinder.

It is an object of the first and second inventions of the present application to prevent generation of a defective filter residue that remains without being separated even by a filter residue removing process.

(Means for Solving the Problems) As a means for solving the above problems, the first invention of the present application is to cover a cylindrical filter on the outer periphery of a cylindrical body having a large number of small holes in a peripheral wall, and to fix an open end portion of the filter. In the tightened filter tube, the entire outer periphery of the filter tightened portion is wrapped in a non-liquid tight contact cover in a close contact state, and the close cover end portion of the filter open end covers the filter open end. Then, a filter fastening part structure of the filtration cylinder, which is in close contact with the outer peripheral surface of the cylinder body, is proposed.

In the second invention of the present application, a cylindrical filter is attached to the outer periphery of a cylinder body having a large number of small holes in the peripheral wall, and a non-liquid-permeable cylindrical packing is attached to the open end portion of the filter to seal the packing. In the filter cylinder in which the filter is fastened via the filter, the entire outer circumference of the filter fastened portion is wrapped in a non-liquid tight contact cover, and the end of the close cover of the filter middle part is the packing end. We propose a filter fastening part structure of a filter cylinder, which is in close contact with the outer peripheral surface of the filter in a state where the filter is covered.

In the present invention, the "close contact cover" means a material such as a heat-shrinkable synthetic resin tube, a rubber tube or tape, an elastic synthetic resin tube or tape, which is adhered by crimping due to its contracting pressure or elastic restoring pressure (compression type contact cover) ), An adhesive tape such as an adhesive tape based on aluminum foil, cloth, synthetic resin, etc. (adhesive adhesive cover), which is a composite of adhesive and adhesive by adding an adhesive to the adhesive adhesive cover It includes things that come into close contact by action (composite type close cover).

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

(Embodiment) First Invention In FIG. 1, a cylindrical body (1) having a large number of small holes (2) ...
The cylindrical spacer (4) made of net or the like is attached to the outer periphery of the cylindrical body (1), and the both ends of the cylindrical body (1) made of filter cloth or the like are opened. This filter (5) is covered with a cylindrical filter (5)
The open end portions of both ends are fastened to the outer peripheral surface of the cylindrical body (1) by the filter fastening portion structure (A) of the present invention to form a filter cylinder.

The filter fastening structure (A) is as follows. As shown in the second drawing, a tightening band (6) is wound around the outer peripheral surface of the open end portion of the filter (5) and fastened to the outer peripheral surface of the cylindrical body (1), and then to the outer circumference of such a fastened portion. For example, a non-liquid-permeable heat-shrinkable cylindrical cover made of vinyl chloride, polyethylene, silicone rubber, etc. is fitted and then the cover is heated to shrink it, and thereby the filter is fastened to the filter fastening portion by crimping by shrinking pressure. A heat-shrinkable close contact cover (7) is formed, and the close contact cover (7) covers the open end of the filter (5), and the open end of the filter is attached to the end of the close contact cover (8). 1) Make a close contact with the outer peripheral surface, and in the present example, extend the contact cover end portion (9) of the middle portion of the filter onto the filter (5) by extending the middle portion to the position of the middle portion rather than the tightening band (6). It is in close contact.

When the filtration cylinder having the above filter fastening structure is installed in the treatment tank and the raw solution (for example, sludge water) is pressure-fed to the outer side of the filter (5) for filtration, the fastening band (6) Even if there is a small gap between the outer peripheral surface of the cylindrical body (1) and the outer surface of the cylindrical body (1), the outside of the small gap is covered with the close contact cover (7) and is blocked from the outside. Not done, and therefore no bad residue will also adhere.

FIG. 3 shows another embodiment, in which an elastic adhesive tape based on a non-liquid-permeable elastic tape such as vinyl chloride resin is spirally wound around the outer periphery of the filter fastening portion while applying appropriate tension, and thereby the base is formed. A pressure-adhesive composite adhesive cover (7a) is formed, which is pressed by the elastic restoring pressure and adhesively adheres, and the other structure is substantially the same as the example of FIGS.

In another embodiment of FIG. 4, the heat-shrinkable adhesive cover has a filter open end similar to the example of FIGS. 1 and 2 between the adhesive cover end portion (8b) and the outer peripheral surface of the cylindrical body (1b). Adhesive (10
b) is applied to form a pressure-bonding composite contact cover (7b) with enhanced adhesion, and the other structure is substantially the same as the example of FIGS.

Second invention In a filter cylinder having the same structure as that of Figs. 1 and 2 except for the filter fastening structure, as shown in Fig. 5, the outer peripheral surface of the open end of the filter (25) is made of rubber or the like. The non-liquid-permeable cylindrical packing (31) is mounted while the open end of the filter (25) is not exposed, and the packing (3
Tightening bands (26), (2
6 ') is wound and tightened, and on the outer circumference of such a tightened part,
A heat-shrinkable adhesive that fits the non-liquid-permeable, heat-shrinkable cylindrical cover made of vinyl chloride or the like as shown in FIGS. A cover (27) is formed, and the contact cover (27) is
With the middle part of the filter covering the open end of the packing (31), close contact of the middle part of the filter (29)
Is attached to the outer peripheral surface of the filter (25), and the end portion (28) of the cover having the open end of the filter is extended to the end of the packing (31) to the end of the cylindrical body (1) in this example. ) It adheres to the outer peripheral surface.

When a filter cylinder having the above filter fastening structure is used for filtration in the same manner as above, the fastening of the fastening band (26 ') may cause the middle part of the filter to float up the end of the packing (31). Also, since the floating cover is pressed down by the close contact cover (27) that is in close contact with the outside, the bad filter residue does not adhere to this portion. In this example, the open end of the spacer (24) extends to the inside of the tightening position of the tightening band (26 '), and the filter (2
Since a space is maintained between the cylindrical body (21) and the cylindrical body (21), the pressurized air that is sent back in the filter cake separation process is sufficiently distributed to the end of the packing (31) and the end of the adhesive cover (29). Then, the filter cake is completely removed.

Also in the present plan, in addition to the above example, a pressure-bonding type contact cover, an adhesive-type contact cover, a composite-type contact cover, etc. by elastic restoring pressure can be appropriately implemented according to the above example.

(Effects of the Invention) According to the filter fastening part structure of the filtration tube of the first invention of the present application, the above-mentioned structure is achieved by the liquid-impervious contact cover as compared with the conventional structure in which the open end portion of the tubular filter is fastened to the tube body. Since the open end of the filter is covered, the filter residue can be prevented from adhering to the open end of the filter in the filtration step, and effective filtration can be continued.

According to the filter fastening part structure of the filter tube of the second invention of the present application, a tubular packing is attached to the open end portion of the tubular filter and the filter is fastened to the tube body through the packing. On the other hand, since the middle part of the filter covered the end of the packing with the non-liquid-permeable adhesive cover,
In the filtration step, it is possible to prevent the adherence of the filter sludge at the end of the packing, and it is possible to continue effective filtration.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a vertical cross-sectional view of a filter cylinder having a filter fastening portion structure of the first invention, in which a part is omitted, and FIG. 2 is an enlarged half surface of the filter fastening portion in FIG. FIG. 3 is an enlarged view of a half cut of another embodiment, FIG. 4 is an enlarged view of a half cut of another embodiment, and FIG. 5 is an enlarged view of a half cut of an embodiment of the second invention. FIG. 7 is a partially omitted vertical sectional view of each filter cylinder having a conventional filter fastening portion structure. A, Aa, Ab, A ₂₀ ...... Filter fastening part structure. 1, 1a, 1
b, 21 …… Cylinder body, 2, 2a, 2b, 22 …… Small holes 5, 5
a, 5b, 25 ... Cylindrical filter, 6, 6a, 6b, 26, 26 '
...... Tightening band, 7,7a, 7b, 27 …… Adhesive cover,
8, 8a, 8b, 28 …… Filter open end, close contact cover end, 9, 9a, 9b, 29 …… Filter middle part, close contact end, 31 …… Cylindrical packing.

Front page continuation (72) Hiroyuki Hirokawa 5-5-16 Hongo, Bunkyo-ku, Tokyo Organo Co., Ltd. (56) References JP 59-66316 (JP, A) JP 61-157315 ( JP, A) Actual development Sho 50-54672 (JP, U) Japanese Patent Sho 47-20060 (JP, B2)

Claims (2)

[Scope of utility model registration request] 1. A filter cylinder in which a cylindrical filter is attached to the outer circumference of a cylinder body having a large number of small holes in the peripheral wall, and the open end portion of the filter is fastened, and the entire outer circumference of the filter fastened portion is not passed. Wrap the filter tightly with a liquid adhesive cover, and close the outer end of the filter with the open end of the filter covering the open end of the filter. Part structure. 2. A tubular filter is attached to the outer periphery of a tubular body having a large number of small holes in its peripheral wall, and a liquid-impermeable tubular packing is attached to the open end portion of the filter, and the filter is inserted through the packing. In the filtration cylinder which is fastened, the whole outer circumference of the filter fastened portion is wrapped in a tight state with a liquid-impermeable close-fitting cover, and the end of the close-fitting cover of the filter middle part covers the end of the packing. In this state, the filter fastening part structure of the filter cylinder is closely attached to the outer peripheral surface of the filter.