JP2001025613A - Filter plate of filter press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the filter plate of a filter press facilitating the attachment of a filter cloth attaching jig, unnecessary to replace a pair of filter cloths wholly even if one filter cloth is damaged and not requiring projections for reinforcing the filter plate. SOLUTION: A filter plate 1 is equipped with an elastically deformable filter cloth attaching jig 10 having a pair of the flange parts 12 fitted in and engaged with the through-hole 6 of the filter plate 1 while elastically deformed and fitted in the recessed parts 8 formed to the peripheries of the openings of both end parts of the through-hole in a close contact state and the filter cloth attaching parts 14 formed to the respective flange parts and attaching the filter cloths arranged between the adjacent filter plates.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter plate of a filter press to which filter cloths arranged between filter plates can be easily attached one by one.

[0002]

2. Description of the Related Art In order to attach a filter cloth to a filter plate of a filter press, conventionally, for example, as disclosed in Japanese Utility Model Publication No. 43-14951, a pair of filter cloths are sewn together at a central hole. In some cases, a cloth is formed and one of the filter cloths is inserted into a through hole of a filter plate and attached.

[0003] Further, as disclosed in Japanese Utility Model Publication No. 40-8301, there is a structure in which a filter cloth attachment is attached to a through hole of a filter plate with a screw and integrated with the filter cloth.

[0004]

However, in the former case, even if one of the filter cloths is damaged, it is necessary to replace all of the pair of filter cloths. It had to be wound in a shape and removed from the through hole of the filter plate.

[0005] In the latter case, a tool for screwing the filter cloth mounting member is required, which is complicated, and a protrusion is used to reinforce the strength of the filter plate by the pressure of the undiluted solution (Japanese Utility Model Publication No. 40-8301). There is a problem that the protrusion 3) is required.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention makes it easy to attach a filter cloth attachment, and it is not necessary to replace all of a pair of filter cloths even if one of the filter cloths is damaged.
An object of the present invention is to provide a filter plate of a filter press which does not require a protrusion for reinforcing the filter plate.

[0007]

In order to achieve the above object, the present invention is configured as follows.

According to the first aspect of the present invention, a pair of elastically deformed fitting holes are engaged with the through holes of the filter plate, and each of the pair is fitted into the concave portions around the openings at both ends of the through hole of the filter plate. And an elastically deformable filter cloth mounting tool comprising a filter cloth mounting portion for mounting the filter cloth provided on each of the flange parts and disposed between adjacent filter plates. A filter plate for a filter press is provided.

According to a second aspect of the present invention, the through-hole is a through-hole for supplying a stock solution, and the filter cloth fixture has a stock solution supply hole. Provide a board.

According to a third aspect of the present invention, the filter cloth mounting tool has a fitting projection at an intermediate portion thereof, and the fitting projection is fitted into the fitting recess of the through hole of the filter plate. The filter plate of the filter press according to the first or second aspect, wherein the filter cloth attachment is fitted and locked in the through hole of the filter plate by being fitted.

[0011] According to a fourth aspect of the present invention, the filter cloth fixture is composed of a divided body formed of an elastic material and divided into two parts, and the divided bodies are mutually separated in the through hole of the filter plate. The filter cloth mounting device is provided with a fitting projection at an inner end that is in close contact with the fitting, and the fitting projection is fitted into the fitting recess of the through hole of the filter plate. The filter plate of the filter press according to any one of the first to third aspects, wherein the filter plate is fitted and locked in the through hole and has the flange portion at an outer end portion.

[0012] According to a fifth aspect of the present invention, the fitting projection of the filter cloth fixture is formed of a circular annular projection having a diameter larger than the depth of the fitting recess. A filter plate of the filter press according to the third or fourth aspect is provided.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments according to the present invention will be described below in detail with reference to FIGS.

Filter plate 1 according to a first embodiment of the present invention
As shown in FIGS. 1 to 3, ears 4,..., 4 each having a rectangular filtration bed 3 at the center thereof and projecting laterally at upper and lower ends of both sides of the outer frame 2. It has a general configuration.

Each of the ears 4 has a through-hole 5, and each of the through-holes 5 normally functions as a filtrate collecting hole. However, when a pressed filter plate is used, at least one of the four through-holes 5 is used. The two through holes 5 are used as compressed air supply holes for compressed air for expanding the compressed membrane of the compressed filter plate.

The through hole 6 substantially at the center of the filter bed 3 is used as a stock solution supply hole and is also used for attaching a filter cloth, and thus has the following structure.

As shown in FIGS. 4 and 5, a central portion of the through-hole 6 has an annular concave portion 7 which is recessed in a direction perpendicular to the axial direction of the through-hole 6, and ends on both sides of the through-hole 6. An annular stepped recess 8 is formed around the opening in the direction parallel to the axial direction of the through hole 6 (the thickness direction of the filter plate 1).

As shown in FIG. 4 to FIG.
The filter cloth fitting 10 made of an elastic material such as rubber or synthetic resin can be fitted into the filter cloth while being elastically deformed. Each filter cloth fitting 10 is a pair of divided bodies 10
a, 10a.

As shown in FIG. 6, each divided body 10a is formed in a substantially cylindrical shape having an undiluted solution supply hole 13 penetrating in the axial direction. An annular protrusion 11 is fitted in the annular recess 7, and an annular flange 12 is fitted on the outer periphery of the other end of the filter plate 1 in the annular step recess 8 of the filter plate 1. Each flange 12 has a filter cloth 20
A filter cloth mounting portion 14 formed of an annular concave portion is formed so as to be cut in the vicinity of the inside thereof, and on the outer surface, a large number of stock solution passages 15, ..., extending radially from a stock solution supply hole 13 through which the stock solution passes. 15.

The filter cloth mounting device 10 includes two divided bodies 10
a and 10a are inserted from before and after the through hole 6 of the filter plate 1 to be attached, respectively, and elastically deformed.
The protrusions 11 of each of the divided bodies 10a are fitted into the recesses 7 of the filter plate 1 to prevent them from falling out of the through holes 6, and the flanges 12 of each of the divided bodies 10a are fitted into the annular step recess 8 of the filter plate 1. Thus, the filter plate 1 is configured.

At this time, since the filter cloth attachment 10 is formed of an elastic body such as rubber or synthetic resin, the two divided bodies 10a and 10a 6, the inner ends of the filter plates 6 are elastically adhered to each other so that the undiluted solution does not easily leak to the filter plate 1 side.
The convex portion 11 and the flange portion 12 of each of the divided bodies 10a are tightly fitted to the concave portion 7 and the annular step portion 8, respectively, so that the space between the filter plate 1 and the filter portion 1 is sealed.

The filter cloth 20 is usually attached to the filter cloth mounting portion 14 of each divided body 10a of the filter cloth mounting tool 10 before the filter cloth mounting tool 10 is mounted on the filter plate 1. When the attachment of the filter cloth attachment 10 to the filter plate 1 is completed, the filter cloth 20,
20 is attached to the front and rear surfaces of each filter plate 1, and the work of attaching the filter cloths 20, 20 becomes easy.

In this manner, the filter cloth 20 is attached to the front and rear surfaces of each filter plate 1 by the filter cloth mounting tool 10, so that a pair of filter cloths 20, 20 are arranged between the adjacent filter plates 1, 1. When the filter plate is fastened to the master plate side by a movable plate of a known filter press, a state as shown in FIG. 2 is obtained, the filter cloth mounting portion 14 is also pressed, and the filter cloth 20 is attached to the filter cloth mounting member 10.
Is sealed by the flange portion 12.

In this state, the adjacent filter cloth fittings 10,
10 are pressed against each other by the filter plate clamping force, so that the contact portion is almost completely sealed.

The undiluted solution is supplied to the undiluted solution supply hole 1 in the filter cloth fixture 10.
2 flows toward the stock solution 3 as shown in FIG.
A filter chamber 21 formed between a pair of filter cloths 20, 20 through
To perform predetermined filtration. After the filtration is completed, the movable plate is retracted, the cake is discharged from between the adjacent filter plates 1 and 1, and the filter cloth is washed, etc., and then the next filter is prepared.

According to the above embodiment, the through hole 6 of the filter plate 1
The filter plate 1 is fitted and locked while being elastically deformed.
And a pair of flanges 12, 12 which are fitted closely to the recesses 8, 8 around the openings at both ends of the pair, and filter cloths 20, 20 provided on each flange 12 and arranged between adjacent filter plates 1, 1. And an elastically deformable filter cloth mounting device 10 having filter cloth mounting portions 14 and 14 for respectively mounting the filter cloth mounting portions 14. Therefore, even if one of the pair of filter cloths 20 attached to the filter plate 1 is damaged, only the damaged filter cloth 20 is attached to the filter cloth mounting fixture 1.
It is only necessary to remove the filter cloth 20 from the filter cloth mounting portion 14 and replace it with a new filter cloth 20, and it is not necessary to replace all of the pair of filter cloths 20, 20, and the filter cloth 20 can be easily replaced.

If the filter cloth attachment 10 is configured to be elastically deformable, it can be attached to the filter plate 1 while being easily elastically deformed without requiring any special tool. Further, if the filter cloth attachment 10 is configured to be elastically deformable, the effect of sealing with the filter plate 1 will be great.

Further, when the filter cloth fitting 10 is tightened, the adjacent filter cloth fittings 10 are in press contact with each other due to the filter plate tightening force. It is not necessary to attach a projection for reinforcing the strength.

It should be noted that the present invention is not limited to the above embodiment, but can be implemented in various other modes.

For example, FIG. 7 shows that the stock solution passage 15 of the filter cloth attachment 10 is not formed so as to extend radially from the stock solution supply hole 13 through which the stock solution passes, but is provided in parallel in the vertical and horizontal directions. Yes, the processing of the filter cloth attachment 10 is facilitated.

FIG. 8 shows the projection 11 of the filter cloth fixture 10.
Instead of the annular convex portion, is formed in the annular convex portion 31 having a circular cross section having a diameter larger than the depth dimension of the concave portion 7, and the sealing effect of the filter plate 1 with the concave portion 7 is more improved. Can be improved.

As shown in FIG. 9, instead of dividing the filter cloth mounting member into two parts, the filter cloth mounting member 30 may be constituted by one member. In this case, it is more convenient to make the outer diameter of the flange portion 12 smaller as a whole when the flange portion 12 is passed through the through hole 6 when the flange portion 12 is attached to the filter plate 1. The cloth 20 is also the filter cloth mounting part 1.
4 can be easily attached.

[0033]

According to the present invention, a pair of flanges are fitted and locked while being elastically deformed in the through hole of the filter plate, and are respectively fitted into the concave portions around the openings at both ends of the through hole of the filter plate. An elastically-deformable filter cloth mounting tool is provided which includes a filter cloth mounting portion for mounting a filter cloth provided on each flange portion and disposed between adjacent filter plates. Therefore, even if one of the pair of filter cloths attached to the filter plate is damaged, it is only necessary to remove the damaged filter cloth from the filter cloth mounting portion of the filter cloth mounting tool and replace it with a new filter cloth. It is not necessary to replace all the filter cloths, and the filter cloths can be easily replaced.

If the filter cloth mounting member is configured to be elastically deformable, no special tool is required, and the filter cloth mounting member can be mounted on the filter plate while being easily elastically deformed. Further, if the filter cloth mounting member is configured to be elastically deformable, the effect of sealing with the filter plate will be great.

In addition, the above-mentioned filter cloth mounting tool is used when the filter plate is tightened.
Since the adjacent filter cloth fittings are in press contact with each other by the filter plate tightening force, it is not necessary to attach a projection for reinforcing the strength of the filter plate as in the related art.

Further, if the convex portion of the filter cloth mounting member is formed as an annular convex portion having a circular cross section having a diameter larger than the depth of the concave portion, the effect of sealing the concave portion of the filter plate can be further improved. Can be.

[Brief description of the drawings]

FIG. 1 is a front view showing a use state of a filter plate of a filter press according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a tightened state of a filter plate of the filter press according to the embodiment of the present invention.

FIG. 3 is a front view showing the filter plate of the filter press according to the embodiment of the present invention without a filter cloth attached.

FIG. 4 is a longitudinal sectional view of the filter plate of FIG.

5 is a cross-sectional view of a main part of the filter plate in a state where a position of a filter cloth attachment of the filter plate of FIG. 4 is indicated by a two-dot chain line.

FIG. 6 is a cross-sectional view showing the filter plate in a state where a filter cloth attachment is attached to the filter plate and the filter cloth is indicated by a dashed line.

FIG. 7 is a front view showing a filter plate of a filter press according to another embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a filter plate of a filter press according to still another embodiment of the present invention.

FIG. 9 is a cross-sectional view showing a filter plate in a state in which a filter cloth attachment is attached to a filter plate of a filter press according to still another embodiment of the present invention, and the filter cloth is indicated by a chain line.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Filter plate, 2 ... Picture frame, 3 ... Filter floor, 4 ... Ear part, 5 ... Through-hole, 6 ... Through-hole, 7 ... Recessed part, 8 ... Annular concave part, 10, 3
0: filter cloth fixture, 10a: divided body, 11, 31: convex part,
12: flange, 13: undiluted solution supply hole, 14: filter cloth mounting part, 1
5 ... stock solution passage, 20 ... filter cloth, 21 ... filter chamber.

Claims (5)

[Claims] 1. A filter plate (1) which is elastically deformed and fitted and locked in a through hole (6) of a filter plate (1), and closely fits into recesses (8) around openings at both ends of the through hole of the filter plate. A pair of collars (1
2) and an elastically deformable filter cloth mounting device (10, 30) including a filter cloth mounting portion (14) provided on each flange portion and mounting a filter cloth (20) disposed between adjacent filter plates. A filter plate of a filter press, characterized by comprising: 2. A filter plate for a filter press according to claim 1, wherein said through-hole is a through-hole for supplying a stock solution, and said filter cloth fitting has a stock solution supply hole (13). 3. The filter cloth fixture has a fitting projection (11, 31) at an intermediate portion thereof, and the fitting projection is fitted into the through hole (6) of the filter plate (1). 3. The filter cloth fitting according to claim 1, wherein the filter cloth fitting is fitted and locked in the through-hole (6) of the filter plate (1) by being fitted into the fitting recess (7). 4. Filter plate for filter press. 4. The filter cloth fixture (10) is divided into two parts (10a) formed of an elastic material, and each divided part is provided with the through hole (6) of the filter plate (1). The fitting protrusions (11, 3)
1), the fitting convex portion is fitted into the fitting concave portion (7) of the through hole (6) of the filter plate (1), so that the filter cloth attaching tool is attached to the filter plate. The filter plate of a filter press according to any one of claims 1 to 3, wherein the filter plate is fitted and locked in the through hole (6) of (1) and has the flange at an outer end portion. 5. The fitting projection of the filter cloth attachment (10) is formed of an annular projection (31) having a diameter larger than the depth of the fitting recess (7) and having a circular cross section. The filter plate of the filter press according to claim 3 or 4, wherein the filter plate is used.