JPH09818A - Diaphragm device in high pressure filter press - Google Patents

Abstract

PURPOSE: To seal a diaphragm prevented from the fatigue by repeated use and having long life by integrally forming a tongue piece to the diaphragm to perform the self-sealing of the diaphragm and forming a recessed groove on a bent part to make the diaphragm deformable. CONSTITUTION: A series of recessed grooves are formed on the seal surface formed to the periphery of a filter plate of which the central part is formed into a recessed shape and a series of O-rings 11 are fitted in the recessed grooves and a diaphragm core plate 2 is fitted to the lateral part of the filter plate 3. A diaphragm 1 is mounted on the side surface of the filter plate 3 along the central recessed side surface thereof. A series of notch grooves 1c are formed on the outside of the bent part to the central recessed part of the mounted diaphragm 1 and a series of tong pieces 1b extending to the central recessed part along the inclined surface to the central recessed part of the diaphragm core plate 2 and having pointed leading ends are formed to the inside part of the bent part. The sealing of a diaphragm chamber and the filter plate is performed over two stages and high pressure work is made possible and production can be made easy and maintenance becomes simple.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a diaphragm device in a high-pressure filter press.

[0002]

2. Description of the Related Art Conventionally, a high-pressure filter press using a diaphragm is well known. Actual fair 3-17927
No. 1 is an example thereof, and in this invention, in order to seal the diaphragm and the filter plate, a seal groove is formed on the outer side of the diaphragm, and a special seal body is inserted into the seal groove.

[0003]

In the above-mentioned apparatus, it is difficult to form the seal groove in the diaphragm material having elasticity, and it is also difficult to manufacture the seal body fitted to the seal groove. Further, in the above-mentioned device, the diaphragm bends and stretches during operation, but this bending and stretching part may be fatigued and broken. In particular, the material of the diaphragm used for high-pressure pressing needs to be hard because it requires strength, and there is a great risk of breakage.

[0004]

SUMMARY OF THE INVENTION The present invention solves the problems of the conventional sealing device for a diaphragm chamber as described above, and the gist of the invention is to provide a plurality of filter plates arranged in parallel. In a high-pressure filter press having a diaphragm in between, a series of concave grooves is provided on the sealing surface around the medium concave filter plate, and a series of O-rings are loaded into the concave groove and the filter plate A diaphragm core plate is provided on the side, the diaphragm is attached to the side surface of the diaphragm core plate along the concave side surface, and a series of cutout grooves are formed outside the bent portion of the attached diaphragm to the middle concave portion of the diaphragm. The diaphragm core plate 2 is provided with a series of tongue pieces which extend to the middle concave portion along the inclined surface of the diaphragm core plate 2 toward the middle concave portion and whose tip is sharpened.

[0005]

The diaphragm device according to the present invention is constructed as described above, and by closing each filter plate, the sealing surface of the peripheral portion of each filter plate and the sealing surface of the peripheral portion of the diaphragm are brought into pressure contact with each other. It is possible to seal the filtration chamber by pressing the O-ring on the sealing surface on the periphery of the diaphragm.

Next, when high-pressure water is injected into the diaphragm chamber to squeeze the cake, the inside of the diaphragm chamber, which has a concave shape, separates from the diaphragm core plate with the inner end portion of the seal surface pressed against the outer periphery as a base point. Although it bends in the direction, at this time, since a series of concave grooves are provided on the outer side of this bending portion of the diaphragm, the cake can be squeezed smoothly by bending without breaking.

At the same time, in the inner part of the refraction part,
The pressure water causes the tongue piece to press against the slope of the diaphragm core plate to completely seal the diaphragm chamber.
This tongue can strongly seal and cake the cake as the diaphragm chamber becomes higher in pressure.

That is, in the device according to the present invention, the sealing portion between the diaphragm chamber (high pressure water chamber) and the filter plate is sealed in two stages by the O-ring provided on the outer peripheral surface and the bent portion provided inside thereof. In particular, the inner seal is capable of self-sealing in which the higher the diaphragm chamber pressure is, the stronger the sealing pressure becomes, and the high-pressure squeezing work exceeding the conventional high-pressure squeezing work (30 to 50 kg / cm 2). Is what makes it possible.

Further, as is apparent from the above-mentioned structure, the device according to the present invention is a two-stage seal, but the O-ring is inserted into the concave groove provided in the filter plate, and the tongue piece is provided inside the diaphragm. Only by itself, the structure is simple, it can be easily manufactured, and the maintenance is extremely easy. Less than,
The present invention will be specifically described based on the drawings.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic flow sheet diagram showing the operation of a filter press using the diaphragm device according to the present invention. In the figure, reference A is a filter press, B is a stock solution tank, and C is a diaphragm. It is a compressed water tank that operates.
In the filter press A, the stock solution is press-filtered from the stock solution tank B, and then high-pressure water is supplied from the press water tank C to the diaphragm provided between the filter plates for press dehydration.

A diaphragm device according to the present invention is provided between filter plates of the above filter press to further squeeze and dehydrate the filtered and dehydrated cake.
As shown in FIGS. 2 to 5, the diaphragm 1 has a circular middle recess 1a formed at the center thereof and is mounted along the side surface of the diaphragm core plate 2, and the peripheral periphery of the circular middle recess 1a. A slanted surface portion 1e is formed along the core plate 2, and its outer shape is formed along the rectangular diaphragm core plate 2 and a sealing surface 1f is formed on the periphery thereof.

This will be described in more detail with reference to FIG.
In FIG. 3, reference numeral 3 is a filter plate arranged in parallel with the diaphragm 1, 4 is a stock solution supply plate, and 5 is a filter cloth provided so as to cover the surface of the diaphragm 1 and the surface of the filter plate 3, and the diaphragm 1 and the filter plate. A filter chamber 6 is formed between the filter chamber 3 and the filter 3.
A stock solution is supplied to the filtration chamber 6 through a stock solution supply path 7 provided in the diaphragm core plate 2, a supply path 8 provided in the filter plate 3, and a solution supply plate 4.

Further, in FIG. 3, reference numeral 9 is a compressed water supply passage provided in the core plate 2, 10 is a filtrate take-out passage, and the diaphragm core plate 2 and the filter plate 3 are combined with the above-mentioned raw liquid passage 7.
When and are closed, a communication path is formed.
(See Figure 2)

Next, the seal structure of the filtration chamber (compression chamber) 6 will be described with reference to FIGS. In FIG. 3, reference numeral 11 is a series of O-rings, which are inserted into grooves provided on the sealing surface around the filter plate 3. Reference numeral 1d is a series of ridges provided on the inner surface of the diaphragm 1 and is inserted into the groove of the diaphragm core plate 2. Also, in FIG.
Reference numeral 1b is a series of tongue pieces provided on the inner surface of the bent portion of the peripheral sealing surface of the diaphragm 1 and the slant surface portion, which extends along the slant surface of the diaphragm core plate 2 and has a pointed tip. When high-pressure compressed water is injected into the diaphragm 1, the diaphragm 1 is attached so as to be in close contact with the slope of the diaphragm core plate 2.
It branches off from the body of. (See FIG. 6) Reference numeral 1c
Is a series of grooves provided on the outside of the bent portion of the diaphragm 1, and when high pressure water is injected into the diaphragm chamber,
The diaphragm 1 is made to bend smoothly.

Since the diaphragm device according to the present invention is constructed as described above, the filtration chamber 6 composed of the diaphragm 1 and the filter plate 3 is composed of the diaphragm 1 and the filter plate 3.
It can be sealed with an O-ring interposed in the flat seal portion around the.

When the cake is squeezed by the filter dehydrator, high-pressure squeeze water is injected into the diaphragm chamber so that the diaphragm 1 is inverted and bent by the squeeze water to press and squeeze the cake.

When the diaphragm 1 is inverted, the tongue piece 1
b is pressed against the slope of the diaphragm core plate 2 to seal the diaphragm chamber. The pressure contact force of the tongue piece 1b becomes stronger as the high-pressure water is injected into the diaphragm chamber, and the high-pressure diaphragm chamber can be completely sealed. That is, a conventional seal using an O-ring or the like is 30 to 50 kg / cm @ 2, whereas a seal of 100 kg / cm @ 2 is possible by using such a self-sealing device.

Further, when the diaphragm 1 is operated in this way, the groove 1c provided outside the bending portion smoothes the refraction, prevents fatigue due to repeated refraction, and prevents early breakage of the diaphragm 1. it can.

[0019]

As described above, the diaphragm device according to the present invention is capable of self-sealing with the tongue piece formed integrally with the diaphragm and capable of high-pressure squeezing, and against deformation of the diaphragm due to injection of high-pressure fluid. Also, by providing a concave groove in the refraction portion, fatigue due to repeated use can be prevented and the life can be maintained, etc., and it has superior performance as compared with the conventional sealing device for the diaphragm chamber.

[Brief description of drawings]

FIG. 1 is a schematic operation flow sheet drawing of a filter press equipped with an apparatus according to the present invention.

FIG. 2 is a schematic front view of a diaphragm according to the present invention.

FIG. 3 is likewise a cross-sectional view taken along line XX of FIG.

FIG. 4 is likewise a sectional view taken along the line YY of FIG. 3, showing only the liquid supply plate portion.

FIG. 5 is likewise an enlarged vertical cross-sectional view showing a seal portion of the diaphragm in an explanatory manner.

FIG. 6 is likewise a vertical cross-sectional view showing the structure of the sealing portion of the diaphragm in a further enlarged manner.

[Explanation of symbols]

 1 Diaphragm 1a Middle recess 1b Tongue 1c Groove 2 Diaphragm core plate 3 Filter plate

Claims (1)

[Claims] 1. A high-pressure filter press in which a diaphragm 1 is provided between filter plates of a large number of filter plates 3 arranged in parallel, and a series of grooves are provided on the sealing surface around the medial concave filter plate 3. A series of O-rings 11 are loaded inside, a diaphragm core plate 2 is provided on the side of the filter plate 3, and the diaphragm 1 is attached to the side surface of the diaphragm core plate 2 along the concave side surface thereof. , A series of cutout grooves 1c is provided outside the bent portion of the diaphragm 1 in the mounted state, and the inside recessed portion is formed along the inclined surface of the diaphragm core plate 2 toward the recessed portion. A diaphragm device in a high-pressure filter press, which is provided with a series of tongue pieces 1b extending inward and having a sharp tip.