JP2011156459A - Filter frame in filter press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter frame in a filter press which can be attached easily to a core frame. <P>SOLUTION: The annular filter frame 1 is arranged between filter plates 2, consists of a rubber-made sealing material having, in the outer periphery, a circumferential groove 1b capable of being engaged in the annular core frame 4 held inside an outer frame 3 and is composed of arc divisions 7 formed by dividing the whole frame into two or more parts in the circumferential direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a filter frame disposed between filter plates in a filter press.

  Conventionally, as disclosed in Patent Document 1, this type of filter frame is made of a rubber sealing material attached to an annular core frame having a square cross section supported inside a quadrangular outer frame. The material (filter frame) is formed with a C-shaped groove on its outer periphery so that it does not come off the core frame due to compression when the filter press is closed, and the core frame is held by the C-shaped groove. It is intended to prevent falling off the core frame.

Japanese Utility Model Publication No. 4-50883

  And although the said filter frame uses the soft thing with a low rubber hardness in order to improve the sealing performance with a filter plate at the time of a closing plate, in attaching the filter frame with respect to an outer frame (core frame), Since the core frame must be held in the C-shaped groove while expanding the C-shaped groove on the entire outer periphery of the annular filter frame against the elastic force, the operator puts a considerable amount of force on both hands and puts the core frame in the core frame. It was necessary to attach the filter frame to the head, and the work was troublesome and time-consuming because it caused pain in the hands.

  Therefore, an object of the present invention is to provide a filter frame in a filter press that can be easily attached to a core frame.

In view of the above problems, the filter frame in the filter press according to the present invention has an annular shape provided on the outer periphery with a circumferential groove disposed between the filter plates and attachable to an annular core frame supported inside the outer frame. It is characterized by comprising an arc-shaped divided body that is divided into a plurality of pieces in the circumferential direction.
In addition, the filter frame is made of a rubber seal material having high hardness, and the circumferential groove is formed in a concave cross section that matches the square cross section of the core frame.
Further, the divided body is characterized by being divided into a plurality of equal parts in the circumferential direction of the filter frame.

  In short, the filter frame according to the present invention is composed of a plurality of arc-shaped divided bodies provided on the outside with arc grooves that can be attached to the core frame (the circumferential grooves are divided in the circumferential direction). Is shorter than a filter frame made of a rubber sealing material integrally formed in an endless annular shape as in the prior art, and is an arc having both ends. Since the arc groove can be easily expanded for mounting on the frame, and each divided body can be assembled and configured in an annular filter frame along the core frame, the core can be easily and easily arranged without labor. It can be attached to the frame, and its work efficiency can be improved.

In addition, in the filter frame assembled in an annular shape as described above, even if a gap is formed between adjacent divided bodies, each divided body is elastically deformed by the compression interposed between the filter plates by the closed plate of the filter press. Thus, the gap can be sealed, and a series of filter frames with good seam sealing properties can be formed between the filter plates in this way, and filtration can be performed as before.
Therefore, according to the present invention, the divided body has the same filtration function as before without requiring high-precision molding, and does not require a large mold for an annular filter frame as in the prior art. However, since the assembly of the filter frame (divided body) to the outer frame (core frame) is very easy as described above, the cost can be reduced as compared with the prior art.
Furthermore, since the divided body can be molded in a small size as described above, it can be easily transported and stored.

In addition, since the circumferential groove is formed in a concave cross-sectional shape that matches the square cross-sectional shape of the core frame, the circular groove formed on the outside of the divided body naturally also has a cross-sectional concave shape that matches the square cross-sectional shape of the core frame. It is shaped like a letter, and it is easy to attach the split body to the core frame simply by pressing the split body against the core frame so that the core frame is pushed into the arc groove without expanding the arc groove against the elastic force. It is possible to further improve the work of attaching the divided body (filter frame) to the core frame.
Even if it is easy to attach to the core frame as described above, since the divided body (filter frame) is made of high-hardness rubber, the arc groove of the divided body is firmly fitted to the core frame, Each divided body does not fall off easily.

  In addition, since the divided bodies have the same shape if they are equally divided into a plurality in the circumferential direction of the filter frame, there is no need to consider each individual mounting position with respect to the core frame. The work efficiency can be improved, and the production of the divided body can be done with a single mold that is smaller and less expensive than a conventional filter frame integrated into an annular shape. Its practical effects such as the provision of a frame are enormous.

It is a front view which shows the example of a division | segmentation of a filter frame. It is a front view which shows the state which attached the filter frame to the outer frame. It is an AA expanded sectional view of FIG. It is principal part sectional drawing which shows a closed plate state. It is principal part sectional drawing which shows a state immediately after opening a plate.

An embodiment of the present invention will be described below with reference to the drawings.
The filter frame 1 shown in the figure 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 metal, inside a gate-shaped or rectangular frame-shaped outer frame 3 (not shown). It is made of a rubber seal material having a high hardness selected from a range of 65 ° to 90 ° and having a JIS rubber thickness that is supported and formed 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 an annular core frame 4 is inscribed and fixed to the upper side and the left and right sides of the outer frame 3 from the inner lower ends of the left and right sides. A support rod 5 is obliquely arranged toward the lower outer periphery of the core frame 4, and an arm 6 is projected from an outer intermediate portion on the left and right sides.

  Further, the filter frame 1 is formed in an annular shape, and the inner peripheral surface 1a is formed so that its cross-sectional shape is curved (concave), and the curvature difference before and after elastic deformation due to compression in the thickness direction is large. In the outer periphery, a circumferential groove 1b having a concave cross section that can be mounted in conformity with the square cross section of the core frame 4 is formed.

And the filter frame 1 is comprised from the circular-arc-shaped division body 7 dividedly formed in multiple by the circumference direction, and the circular groove 7a by which the circumferential groove | channel 1b was divided | segmented outside each division body 7 Have
Each divided body 7 preferably divides the filter frame 1 equally in the circumferential direction as in the illustrated example. In the illustrated example, the filter frame 1 is divided into four equal parts (see FIG. 1). The fraction is set appropriately.

Then, the core frame 4 is inserted into the arc groove 7a along the core frame 4 of the outer frame 3 and fitted into the arc groove 7a of each divided body 7, that is, the arc groove 7a is not expanded against the elastic force. In this way, by simply pressing the divided body 7 against the core frame 4, each divided body 7 can be assembled along the core frame 4 to the annular filter frame 1. By being configured, it is supported inside the outer frame 3.
Each divided body 7 in the filter frame 1 can be easily mounted by simply fitting the core material 4 having a rectangular cross section in each arc groove 7a. However, the divided body 7 (filter frame 1) is the above-mentioned. Thus, the arcuate groove 7a of the divided body 7 is firmly fitted to the core frame 4 so that the mounting state of each divided body 7 with respect to the core material 4 is maintained. Will not fall off easily.

In the filter frame 1 configured 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 addition, even if a gap is generated between the end faces of the adjacent divided bodies 7 in the filter frame 1 in a state before the filter plate 2 is sandwiched (opened), the compression is interposed between the filter plates 2 when the filter plate 1 is closed. The divided body 7 is elastically deformed to seal the gap, and thus a series of filter frames 1 (peripheral walls of the filtration chamber 8) having a good seam sealing property are formed between the filter plates 2. Become.

In such a closed plate state, the filter frame 1 is made of a high-hardness rubber sealing material formed so as to protrude forward and backward in the thickness direction of the outer frame 3, so that it loses its shape even when pressed between the filter plates 2. The optimal shape of the filtration chamber 8 is maintained without doing so.
And durability can be maintained, maintaining the favorable sealing (sealing) property, elastically deforming so that the part which contacts the filter plate 2 via the filter cloth (not shown) in the filter frame 1 may closely_contact | adhere.
Thus, the filter cloth 1 made of a rubber sealing material is in direct contact with the filter cloth, so that the filter cloth is not damaged.

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).

1 Filter frame
1b Circumferential groove 2 Filter plate 3 Outer frame 4 Core frame 7 Divided body

Claims (3)

  An annular filter frame made of a rubber seal material provided on the outer periphery with a circumferential groove disposed between the filter plates and mounted on an annular core frame supported on the inner side of the outer frame. A filter frame in a filter press, characterized in that the frame comprises an arc-shaped divided body divided into a plurality in the circumferential direction.   2. A filter frame in a filter press according to claim 1, wherein the filter frame is made of a rubber seal material with high hardness, and the circumferential groove is formed in a cross-sectional concave shape matching the square cross-sectional shape of the core frame.   3. A filter frame in a filter press according to claim 1, wherein the divided body is divided into a plurality of equal parts in the circumferential direction of the filter frame.

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