JPH063405U - Liquid leak prevention structure for filter cloth - Google Patents

Abstract

(57) [Summary] [Object] To provide an inexpensive liquid leakage preventing structure for a filter cloth in a filter press used for solid-liquid separation for high pressure. [Structure] A filter cloth applied to a filter has a structure in which a rubber-based material or a resin-based material is impregnated into an outer edge portion of the filter cloth which has a sealing function of filtration pressure.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention is applied to the field of a filter for performing solid-liquid separation, particularly to a filter press.

[0002]

[Prior art]

The filter press shown in FIGS. 4 and 5 is widely used as a model for separating a liquid containing solids (hereinafter referred to as a stock solution) into solids and liquids. The filter press 1 has a structure in which a plurality of filter plates 2 having concave surfaces are sandwiched between a fixed frame 3 and a movable frame 4 so as to be opened and closed. When the filter cloth 5 is stretched around the filter plate 2 and the pressure of filtration is high, for example, 20 kg / cm ² or more, the groove provided on the outer edge of the filter plate 2 has, for example, a rubber string shape. It is usual that the so-called sealing ring 7 having the elasticity described above is housed and a structure for preventing liquid leakage from the inside is adopted (see FIG. 1B).

A plurality of adjoining filter plates 2 having the above-mentioned structure are closed so as to be in contact with each other, and a stock solution 10 is pressed into a filter chamber 6 formed between filter cloths 5 by a pump 9, The filtrate is discharged to the outside of the filter plate 2, solids are collected on the filter cloth 5 to form a cake in the filter chamber 6, and the stock solution 10 is supplied when the filter chamber 6 is filled with the cake. The operation is stopped and the filter plate 2 is sequentially opened to discharge the cake.

[0004]

[Problems to be solved by the device]

When the filtration pressure is as high as 20 kg / cm ² or more, it is necessary to strengthen the prevention of liquid leakage from the inside as described above. In the case of the conventional structure having the sealing ring 7, it is necessary to form a groove for accommodating the sealing ring 7, and this portion has been a major factor in increasing the price of the filter plate. Further, compared to the circular filter plate, in the case of the rectangular filter plate, it was difficult to join the sealing ring 7 at the corner portion, and the reliability was somewhat inferior. The present invention provides an inexpensive structure that prevents liquid leakage from between the filter plates 2 even when the pressure of filtration is high.

[0005]

[Means for Solving the Problems]

 The gist of the present invention is that a filter cloth applied to a filter is characterized in that a rubber material or a resin material is impregnated into an outer edge portion of the filter cloth which has a sealing function of filtering pressure. It has a liquid leakage prevention structure.

[0006]

[Action]

 By impregnating the filter cloth 5 with the above-mentioned rubber-based material or resin-based material, various gaps existing in the fiber portion forming the filter cloth can be filled. In addition, the contact surface between the filter plate 2 and the filter cloth 5 and the contact surface between the adjacent filter cloths 5 are brought into close contact with each other by the elasticity of the impregnating material due to the pressing force of the filter cloth 2. Therefore, it has the action of suppressing the liquid leakage that is originally expected in this part, which occurs due to the pressure of filtration.

[0007]

【Example】

 An embodiment of the present invention is shown in FIGS. 1, 2 and 3. As shown in the figure, in the present invention, the outer edge of the filter cloth 5 stretched over the filter plate 2 of the filter, to be exact, the portion sandwiched between the adjacent filter plates 2 and 2 (hatched portion in FIG. 3). , Rubber-based material or resin-based material is impregnated (hatched area in FIG. 1 (A)) to cause liquid leakage due to filtration pressure applied from the inside. The effect of filling a minute gap in the surface can be obtained.

[0008]

[Effect of device]

 By adopting the preventive structure of the present invention described above, even if the specifications for high filtration pressure are high, the groove processing for fitting the sealing ring into the filter plate and the sealing ring are unnecessary, and the manufacturing cost of the filter plate is reduced. it can. In addition, the adhesion on the contact surface is improved, and a highly reliable sealing function can be obtained.

[Brief description of drawings]

FIG. 1A is a detailed view of the present invention, and FIG. 1B is a detailed view of a conventional method.

FIG. 2 is a sectional view of a filter plate according to the present invention.

FIG. 3 is a front view of a filter cloth according to the present invention.

FIG. 4 is an overall view of solid-liquid separation by a filter press.

FIG. 5 is a sectional view of a conventional filter plate.

[Explanation of symbols]

 1 Filter Press 2 Filter Plate 3 Fixed Frame 4 Moving Frame 5 Filter Cloth 6 Filter Chamber 7 Sealing Ring 8 Filter Plate Pressing Cylinder 9 Pump 10 Stock Solution

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenichi Segawa 46-59 Nakahara, Tobata-ku, Kitakyushu, Fukuoka 46-59 Nippon Steel Corporation Machinery & Plant Division (72) Masao Shimoda Tobata-ku, Kitakyushu, Fukuoka Nakahara 46-59 Nippon Steel Co., Ltd., Machinery & Plant Division (72) Creator Mitsuya Murata 46-59, Nakahara 46, Tobata-ku, Kitakyushu-shi, Fukuoka Nakahara Machinery & Plant Division

Claims (1)

[Scope of utility model registration request] 1. A filter cloth liquid leakage prevention structure, characterized in that, in a filter cloth applied to a filtering machine, a rubber material or a resin material is impregnated into an outer edge portion of the filter cloth which has a function of sealing a filtration pressure. .