JPS6010650Y2 - filter press filter cloth - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a filter cloth used in a filter press filtration device.

To explain the filter cloth of the present invention with reference to an embodiment diagram, a synthetic fiber filter cloth 1 is formed into a rectangle with a length to width ratio of approximately 1:2 so that it becomes approximately square when folded in half. It is cut and has circular holes 2 and 3 in the center of each square.
has been established.

Note that 2' and 3' are edging cloths sewn to the inner edges of the through holes 2 and 3.

Then, an elastic backing 4 made of rubber or the like is annularly fixed to the periphery of the filter cloth so as to surround the through hole 3 only on one side of the square.

As for the fixing means, it is preferable to pour the rubber onto the surface of the synthetic fiber cloth when it is melted and fix it integrally, but it is also possible to use sewing.

Next, in order to explain how the filter cloth is used, the filter press filtration device will be briefly explained. A filter plate 6 having an I-shaped cross section and a disk shape from the front is arranged on the front and back surfaces concentrically with a through hole 7 opened in the center. and a large number of annular grooves 8, 8...
Radial vertical grooves 9, 9 intersecting with the annular grooves 8, 8, . . . are formed on the front and back surfaces. It is connected to
In addition, an arm portion 11 is provided in the outer frame portion to support the filter plate itself.
．． 11 are provided oppositely on both sides.

Reference numeral 12 denotes a disc-shaped perforated plate which is brought into contact with the front and back surfaces of the filter plate 6, and has a through hole 13 in the center thereof.

As shown in FIG. 5, a plurality of filter plates 6 are arranged in parallel with arm portions 11 suspended over horizontally provided support rods 5.
The filter cloth 1 is folded in half at the upper edge of each filter plate, and the through holes 2,
3, the through holes 7 of the filter plate 6 and the through holes 13 of the perforated plate 12 are aligned, the flange pipe 14 is inserted into these through holes, and the flange plate 15 is screwed to the other end and tightened.

In this way, a plurality of filter plates 6 each having a filter cloth attached thereto are connected to the fifth filter plate.
If each filter plate is compressed by applying pressure in the lateral direction as shown by the arrows in the figure, the elastic backing 4 fixed to the filter cloth 1 will come into close contact with the filter cloth covered with the adjacent filter plate, and airtightness will be maintained. be done.

That is, when slurry is supplied into the flange pipe 14 and flows into the space 16 between adjacent filter cloths, and the water pressure of the slurry becomes high, the elastic backing 4 is loaded with the high water pressure, but the elastic backing 4 Since it is held between the filter plates and tightly connected to the filter cloth, there is no risk of leakage.

The slurry water that has passed through the filter cloth 1 is passed through the perforated plate 12 and the annular grooves 8, 8.
. . . It passes through the vertical groove 9 and is discharged to the outside from the through hole 10.

Although not shown, if a fastener is attached to the peripheral edge of the filter cloth 1, the cheese stored in the gap 16 can be secured to the filter plate in the form of a bag that covers the entire circumference of the filter plate. When each filter plate is moved on the support rod 5 for disposal, the peripheral edge of the filter cloth does not become an obstacle to the movement, or the filter cloth does not stick to the cheese and roll up when taking out the cheese.

The conventional filter press filter cloth is, for example,
6374 or Utility Model Publication No. 47-19981, or a filter cloth with an elastic backing as described in U.S. Pat. No. 3,382,985 and the drawings. There was one that was stuck to both the front and back sides of the entire periphery, but the former was completely stuck to the filter plate.
It cannot withstand high water pressure unless a waterproofing means such as a 1J ring is installed, and maintenance is difficult because there is a risk of filtering if the 01J ring is not often replaced, and the latter requires folding in half due to the manufacturing cost. It was not suitable for use.

On the other hand, as explained in the above embodiment, the filter press filter cloth of the present invention has an elastic backing fixed to only one side of the half of the filter cloth, so the manufacturing cost is very low, and when in use, This elastic backing adheres closely to adjacent filter cloths to prevent water leakage, so the filter plate does not require waterproofing means such as O-rings, simplifying the configuration and reliably preventing leakage even under high pressure. It is something.

Furthermore, this elastic backing protects the filter cloth and prevents damage such as damage to the filter cloth at the corners of the filter plate, which is advantageous in that it facilitates operation.

[Brief explanation of the drawing]

Fig. 1 is a front view of the filter cloth according to the present invention, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1, Fig. 3 is a front view of the filter plate, and Fig. 4 is a front view of the perforated plate. , FIG. 5 is a cross-sectional view of a main part of a filter press filtration device showing how the filter cloth according to the present invention is used, and FIG.
The figure is a partially enlarged view of FIG. 5. 1... Filter cloth, 2, 3... Through hole, 4...
...Elastic backing.

Claims (1)

[Scope of utility model registration request] Cut a piece of filter cloth into rectangles with a length to width ratio of approximately 1:2 so that it is approximately square when folded in half, and create a circular hole in the center of each square. In addition, a filter press filter cloth characterized in that an elastic backing made of rubber or the like is integrally fixed to the periphery of the filter cloth so as to surround the periphery of the through hole only on one side of the square surface.