JP5851437B2 - Spacer reinforcement in filter press filter frame - Google Patents

Description

  The present invention relates to a spacer reinforcing member provided in a filter frame so as to maintain a distance from the filter plate when the plate is closed in a dual filter press in which a filter frame is interposed between filter plates.

Conventionally, in this type of filter frame, a rubber sealing material is attached to a metal core frame supported on the inner side of the outer frame in order to improve the sealing performance with the filter plate when closed.
Therefore, in order to protect the filter frame and maintain the optimum shape of the filtration chamber and to perform proper filtration, it is necessary to regulate the extreme compression pressure acting on the filter frame between the filter plates by the tightening force when closing the plate. As disclosed in Patent Document 1, a plurality of metal spacers project from the outer periphery of the filter frame, and the filter frame is protected by interposing the spacers between the filter plates when the plate is closed.

  The spacer has a predetermined distance from the filter plate when the plate is closed due to wear or corrosion of the contact surface with the filter plate due to repeated dehydration of the stock solution under a strong clamping pressure over a long period of time. Since the thickness of the spacer cannot be maintained, the spacer is detachably attached to the filter frame.

Japanese Utility Model Publication No. 4-50883

However, the above replaceable spacer is formed in a shape that can be attached to and detached from the filter frame, and a dedicated filter frame to which the spacer can be attached is necessary. It was.
Therefore, an object of the present invention is to provide an inexpensive reinforcing material that is replaceably attached to an existing filter frame spacer.

In view of the above problems, the spacer reinforcing material in the filter frame of the filter press of the present invention is attached to a columnar spacer protruding at predetermined intervals on the outer periphery of the filter frame interposed between the filter plates. A pair of rectangular reinforcing plates that are attached to a circular surface of the spacer facing the filter plate and can be brought into contact with the filter plate in parallel, and the spacer is interposed between the reinforcing plates. removably and clamped, characterized by being bent from the respective corner portions of the side spacer of the tip of the front Symbol reinforcing plate run off from the facing surface.

In short, the present invention is attached to a columnar spacer projecting at predetermined intervals on the outer periphery of a filter frame interposed between filter plates, and covers the circular facing surface of the spacer with the filter plate. It consists of a U-shaped metal plate with a pair of rectangular reinforcing plates that can be attached and abutted against the filter plate in parallel, and a spacer is detachably sandwiched between the reinforcing plates. The attached reinforcing plate is directly pressed against the filter plate, and if the thickness of the reinforcing plate is reduced by use, it is only necessary to replace the reinforcing material with respect to the spacer. A spacer is not required, and it can be applied not only to an existing filter frame, but also because the reinforcing material itself has a simple structure and is easy to attach and detach, it can be provided at a significantly lower price than conventional ones.

Each corner of the end of the reinforcing plate that protrudes from the opposing surface of the spacer is bent to the side of the spacer, so it can be easily fixed to the spacer and can be prevented from coming off the spacer. Since each corner portion of the bent tip is folded back and peeled off from the spacer as it is, its practical effect such as its removal can be relatively easy.

It is a front view of a filter frame. It is the principal part enlarged view of a filter frame, (a) is a front view, (b) It is a side view. It is a perspective view which shows the state which attached the reinforcing material to the spacer. It is principal part sectional drawing which shows a closed plate state. It is principal part sectional drawing which shows the state immediately after opening.

An embodiment of the present invention will be described below with reference to the drawings.
The filter frame 1 shown in FIG. 1 is arranged in parallel so as to be interposed between the filter plates 2 in the longitudinal direction of the filter press, and is made of a metal-made gate-shaped or rectangular frame-shaped outer frame 3 (not shown). It is made of a rubber seal material that is supported by the outer frame 3 and formed thick so as to protrude forward and backward in the thickness direction of the outer frame 3.

  In the illustrated example, the outer frame 3 is formed in a gate shape as described above, and the upper and left and right sides of the outer frame 3 have a rectangular cross-section and an annular core frame 4 that is thinner than this and is supported on the upper and left and right sides. The plate 5 is inscribed and fixed, the support rod 6 is obliquely provided from the inner lower end of the left and right sides toward the outer periphery of the core frame 4, and the arm 7 is projected from the outer intermediate portion of the left and right sides. Yes.

  In addition, the sealing material (filter frame) 1 is formed in an annular shape, and the inner peripheral surface 1a is formed in a concave shape (concave shape) in its cross-sectional shape, and before and after elastic deformation by compression in the thickness direction. The curvature difference is set to be large, and a circumferential groove 1b having a C-shaped cross section that can be attached to match the rectangular cross-sectional shape of the core frame 4 is formed on the outer periphery. The filter frame 1 is prevented from falling off from the core frame 4 by holding the core frame 4 by the circumferential groove 1b.

Then, the outer periphery of the filter frame 1 is regulated by the tightening force at the time of closing the plate so that extreme compression pressure acts on the filter frame 1 between the filter plates 2. In order to keep the configured filtration chamber 8 in an optimum shape and perform proper filtration, a plurality of metal spacers 10 that are press-contacted together with a reinforcing material 9 described later are provided between the filter plates 2 at predetermined intervals. Yes.
This spacer 10 is formed by forming a circular flat front and rear end surface into a columnar shape formed with opposed surfaces 10a and 10b facing the filter plate 2, and a thin and widened projecting piece at a semicircular portion in the middle of the front and rear direction. 10 c is provided, and the wide end portion 10 d of the projecting piece 10 c is welded and fixed to a suitable place on the outer peripheral surface of the filter frame 1.

Each spacer 10 is provided with a reinforcing material 9 according to the present invention.
The reinforcing member 9 is formed by arranging a pair of rectangular reinforcing plates 9a and 9b, which are attached to the entire circular facing surfaces 10a and 10b of the spacer 10 in the spacer 10 so as to be in contact with the filter plate 2 in parallel. It consists of a U-shaped metal plate, and a spacer 10 is detachably sandwiched between the reinforcing plates 9a and 9b.

  The reinforcing member 9 is formed by bending a rectangular metal plate having a predetermined thickness and a predetermined vertical and horizontal length into a U shape so as to correspond to the three surfaces including the opposing surfaces 10a and 10b of the spacer 10. It can be manufactured inexpensively with a very simple configuration.

Then, the end portions of the reinforcing plates 9a and 9b protruding from the opposing surfaces 10a and 10b of the spacer 10 (in the illustrated example, the respective corner portions of the ends) 9c are bent to the side of the spacer 10 to thereby form the spacer. 10 is used to prevent the reinforcement 9 from being removed.
The bending of each corner 9c can be easily processed using a jig such as a hammer.

  In the filter frame 1 in which the reinforcing material 9 is attached to the spacer 10 as described above, the peripheral wall of the filtration chamber 8 is configured by being sandwiched between the front and rear filter plates 2 when the filter press is closed.

In such a closed plate state, the spacer 10 to which the reinforcing material 9 is attached is press-contacted between the filter plates 2 to maintain a predetermined interval between the filter plates 2 so that an extreme compression pressure acts on the filter frame 1. The filter frame 1 maintains the optimal shape of the filtration chamber 8 without losing its shape.
Then, the filter frame 1 is elastically deformed so that a portion of the filter frame 1 that is in contact with the filter plate 2 via a filter cloth (not shown) is in close contact with each other, thereby maintaining good sealing performance.

In the filter press, when the stock solution is injected into the filtration chamber 8 in the closed plate state and the filtration is completed, the filter cake W that is opened and remains in the filtration chamber 8 is discharged to the outside.
In discharging the filter cake W, the concave curvature of the inner peripheral surface 1a of the filter frame is greater when the filter frame 1 is opened than when the filter frame 1 is compressed in the thickness direction. Since the curvature is large, even if the outer periphery of the filter cake W generated in the filter chamber 8 by the filtration at the time of closing the plate is in close contact with the inner peripheral surface 1a of the filter frame, the compression to the filter frame 1 is released at the same time as the plate is opened. Since the inner peripheral surface 1a of the filter frame is elastically restored with a larger curvature than the outer periphery of the W, a gap is formed between the inner peripheral surface 1a of the filter frame and the outer periphery of the filter cake W, and the elasticity generated when the filter frame 1 is deformed is also obtained. In combination, the filter cake W can be removed from the filter frame 1 with certainty (see FIGS. 4 and 5).

  Then, when the thickness of the reinforcing plates 9a and 9b in the reinforcing material 9 is reduced due to long-term use, each corner portion 9c is folded back with a jig as appropriate, and the reinforcing plates 9a and 9b are warped. The reinforcing material 9 is removed from the spacer 10, and a new reinforcing material 9 is attached.

1 filter frame 2 filter plate
9a, 9b Reinforcing plate
9c each corner
10 Spacer
10a, 10b Opposing surfaces

Claims (1)

Reinforcing material attached to a columnar spacer projecting at predetermined intervals on the outer periphery of a filter frame interposed between filter plates, the reinforcing material on the circular facing surface of the spacer with the filter plate It consists of a U-shaped metal plate in which a pair of rectangular reinforcing plates that can be attached and abutted against the filter plate are arranged in parallel. A spacer is detachably sandwiched between the reinforcing plates, and eaten from the opposite surface. A spacer reinforcing material in a filter frame of a filter press, wherein each corner of the leading end of the reinforcing plate to be bent is bent to the side of the spacer.

Images