JPH08164306A - Distance for feeding port of filter plate - Google Patents

Abstract

PURPOSE: To reduce and disperse stress generated in a feeding port by working an inner edge part of a distance (a kind of spacer) to be clamped into the feeding port to a radius specified times the thickness of a filter plate. CONSTITUTION: A distance 14 is clamped into a feeding port 13 passing through the center of a filter part 11 of a filter plate 1. An inner edge part 141 thereof is worked into an arc or a chamfer having a radius 0.5-2 times the thickness d-2 of the filter part 11. In case of <0.5, stress reducing effect is small, and in case of >2, the deformation of the distance 14 is large to increase stress. The distance 14 clamps a part of the feeding port 13 of the filter plate 1 and is formed so as to have an U-shaped section over both sides thereof. Thickness d-3 in the back and front direction is set to coincide with thickness d-1 of a seal part 12 of the filter plate 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter plate supply port distance, and more particularly to a distance for reducing and dispersing stress generated at a supply port part of a filter plate incorporated in a filter press for solid-liquid separation.

[0002]

2. Description of the Related Art Conventionally, various kinds of plastic filter plates incorporated in a filter press have been known, but these filter plates usually have a groove for a drainage liquid filtrate passage on the surface thereof. It is composed of an engraved filter part and a thick seal part formed on the peripheral part, and a plurality of pressure plates of a filter press machine are used in parallel with each other in the vertical direction in parallel with this. Then, at the time of filtration, the peripheral portions of the respective filter plates are contact-sealed with each other by a pressing device, a filtration chamber is formed between the filter plates, and a slurry or the like is introduced into the filtration chamber and pressure-filtered,
After completion of filtration, the filter plate is opened and the residue is discharged.

Since the filter press machine repeats the above steps, the filter plate is apt to be deformed by the pressure difference between the front and back sides generated when pressure is applied in this cycle. Therefore, this deformation causes adjacent filter plate supply ports to approach each other and makes it difficult for the slurry or the like to flow in. Therefore, a distance is attached to the supply ports to prevent the supply ports from approaching each other.
However, stress may concentrate on the portion where the inner edge portion of the distance of the supply port comes into contact with and may be damaged from there.

[0004]

The present invention is to solve the above-mentioned problems, and the gist thereof is a distance attached to the inner peripheral edge of the supply port of the filter plate, which is sandwiched between a part of the supply port. The inner edge of the distance to wear,
The filter plate supply port distance is characterized in that it is processed into an arc having a radius of 0.5 to 2 times the filter plate thickness or chamfered.

[0005]

Embodiments of the present invention will be specifically described below. 1 is a plan view of a filter plate to which the present invention is attached, FIG. 2 is an enlarged cross-sectional view taken along the line XX of FIG. 1, and FIG. 3 is partially omitted from an example of deformation when the filter plate is used. It is shown in a side sectional view.

As shown in the plan view of FIG. 1 and the sectional view of FIG. 2, the present invention provides a part of the inner peripheral edge portion of the supply port 13 penetrating the center of the filter portion 11 of the filter plate 1. A distance 14 having a substantially U-shaped cross section which is sandwiched and attached, and an inner edge portion 141 thereof is formed in an arc shape having a radius of 0.5 to 2 times the thickness dimension d-2 of the filtration portion 11, or is chamfered. If it is out of the above range and is 0.5 times or less, the stress reducing effect is small, and if it is 2 times or more, the deformation of the distance 14 becomes rather large and the stress increases, which is not preferable. Further, the distance 14 is formed in a substantially U-shaped cross section across both front and back surfaces by sandwiching a part of the supply port 13 of the filter plate 1, and the thickness d-3 in the front and back direction is the same as that of the filter plate 1. It is necessary to set the same as the thickness d-1 of the seal portion 12.

According to the above-mentioned present invention, as shown in the sectional view of FIG. 3, even if the filter plate 1 is deformed in the direction of the arrow due to the pressure difference between the front side and the back side by the pressurization, it is attached to the supply port 13 of the filter plate 1. The arc of the inner edge portion 141 of the distance 14 avoids concentration of stress generated in the supply port 13 and reduces and disperses it.

On the peripheral edge of a square with one side of 1220 mm,
Seal part 12 having a thickness of d-1 of 73 mm and a width of w of 60 mm
And a supply port 13 of the filter plate 1 in which a d-thickness 23 mm filtration section 11 having a width of 6 mm and a recessed groove (not shown) having a depth of 4 mm is formed on the inside thereof.
, The inner edge portion 141 is provided with a distance 14 having a circular arc having a radius of 20 mm, and the maximum principal stress ratio generated in the filter plate 1 having the distance 14 is 0.91, while the inner edge portion is The maximum principal stress ratio generated in the filter plate provided with a distance that does not form a circular arc is 1.00, and it is clear that the effect of reducing the generated stress according to the present invention is great.

[0009]

Since the present invention has the above-mentioned structure, it has the following effects. In other words, the effect of reducing the stress generated in the supply port of the filter plate by the distance provided in the present invention and having a substantially U-shaped cross section is large.

[Brief description of drawings]

FIG. 1 shows in plan view a filter plate to which the present invention is attached.

2 is an enlarged cross-sectional view taken along the line XX of FIG.

FIG. 3 is a side cross-sectional view in which part of the filter plate is deformed when it is used.

[Explanation of symbols]

 1 Filter Plate 11 Filtering Part 12 Sealing Part 13 Supply Port 14 Distance 141 Inside Edge Part

Claims (1)

[Claims] 1. A radius attached to an inner peripheral edge portion of a supply opening of a filter plate, wherein an inner edge portion of the distance sandwiched in a part of the supply opening has a radius of 0.5 to 2 times the thickness of the filter plate. A filter plate supply port distance characterized by being processed into a circular arc or chamfered shape.