JP2016215110A - Filter frame in filter press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter frame capable of being easily attached to a core frame in a filter press.SOLUTION: An annular filter frame 1 is arranged between filter plates 2, and made of a rubber seal material that has an outer periphery provided with a recessed groove 8 capable of being attached to an annular core frame 5 supported inside an outer frame 3. The recessed groove 8 comprises: an inner wall 8a vertically formed on one side; and an inner wall 8b formed on the other side having, at its opening end, a protrusion 9 including an inclined face 9a inclined from the opening end 8c toward a groove bottom 8d, and a support face 9b facing the groove bottom 8d across a thickness t of the core frame 5.SELECTED DRAWING: Figure 4

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 of the present invention is an annular ring provided between the filter plates and provided with a concave groove on the outer periphery that can be attached to an annular core frame supported inside the outer frame. It is made of a rubber seal material, and one inner wall surface of the concave groove is vertically formed, and an opening end of the other inner wall is inclined to the groove bottom from the opening end, and the groove bottom A protrusion having a support surface opposed to each other through the thickness of the core frame is provided.
In addition, the filter frame is characterized by comprising an arc-shaped divided body divided into a plurality in the circumferential direction.
Furthermore, each end of the divided body may be formed in a concavo-convex shape that matches and can be connected.

  In short, the filter frame according to the present invention is made of an annular rubber seal material provided with a recessed groove that can be attached to the core frame on the outer periphery, and has one inner wall surface of the recessed groove formed vertically and the other inner wall. Since the ridge having a slope inclined from the opening end toward the groove bottom and a support surface facing the groove bottom through the thickness of the core frame is provided at the open end of the filter frame. When attaching the core frame, one end of the core frame is made to correspond to the vertical inner wall surface of the concave groove, and the other end on the inner peripheral side of the core frame is pressed against the inclined surface of the ridge and pressed. The core frame can be guided into the recessed groove at the back while only the inner wall having the stripe is gradually elastically expanded along the inclination of the ridge, and the filter frame can be attached to the core frame much more easily than before. The inner wall is elastically restored after passing through the core frame, and the core frame is held by the protrusion in the concave groove. Because the pull-out of the core frame from the groove can be prevented.

Since the filter frame is composed of an arc-shaped divided body divided into a plurality in the circumferential direction, each divided body is shorter than a filter frame made of a rubber seal material integrally formed in an endless annular shape, Since it is a circular arc having both ends, the inner wall having the ridges of the concave groove can be more easily expanded, and the divided bodies can be attached to the core frame, whereby each divided body can be used as an annular filter frame along the core frame. Since it can be assembled, the filter frame can be easily and easily attached to the core frame without labor, and the work efficiency can be improved.
Moreover, the conventional large mold for the annular filter frame is not required, the manufacturing is relatively easy, and the assembly of the filter frame (divided body) to the outer frame (core frame) is as described above. Therefore, 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.

  Since each end of the divided body has a concave and convex shape that can be connected and connected to each other, a gap is generated between adjacent divided bodies in the filter frame in which the divided body is assembled in an annular shape as described above. They can be connected to each other, and a series of filter frames with good seam sealing properties can be formed between the filter plates in this way.

It is a front view which shows the state which attached the filter frame to the outer frame. It is AA sectional drawing of FIG. It is a front view of a division body. It is a BB cross-section end view of FIG. It is a perspective view which shows the edge part of a division body.

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 supported inside the outer rectangular frame 3 made of metal, and The outer frame 3 is made of a rubber sealing material that is formed thick so as to protrude forward and backward in the thickness direction.

  The outer frame 3 is formed in a flat plate shape whose cross-sectional shape is long in the front-rear direction, and the cross-sectional shape is formed on the inner intermediate portion of each side through a support plate 4 that is thinner than the front-rear length and has a predetermined shape. A core frame 5 that is formed in a flat plate shape that is longer than the wall thickness of the support plate 4 and formed in an annular shape is inscribed and fixed, and an arm 6 projects from an outer intermediate portion on the left and right sides.

Further, the sealing material (filter frame) 1 is formed in an annular shape, and is set so that a difference in curvature before and after elastic deformation due to compression in the thickness (front and rear) direction becomes large.
In the filter frame 1, an inner peripheral portion 1 a for holding a filter cake (cake) (not shown) has a cross-sectional shape that is curved in a concave shape (concave shape), and is projected to the periphery of both openings of the inner peripheral portion 1 a. Lips 1b and 1c having different diameters project from each other, and an opening having a lip 1b on the side having a larger diameter (the side having a shorter projection length) is used as the filter cake discharge port 7.

On the outer periphery of the filter frame 1, a concave groove 8 is formed that can be fitted in conformity with the square cross-sectional shape of the core frame 5.
The concave groove 8 has one inner wall surface 8a formed vertically, and an opening end 8c of the other inner wall 8b has an inclined surface 9a inclined from the opening end 8c toward the groove bottom 8d, and a groove bottom 8d. A protrusion 9 having a support surface 9b opposed to each other through the thickness t of the core frame 5 is projected, and the minimum width D of the opening (hereinafter also referred to as opening D or opening width D) is the core frame width. It is made narrower than d.

As shown in the drawing, it is more preferable that the concave groove 8 is formed so that the inner wall surface 8a perpendicular to the side having the filter cake outlet 7 corresponds.
By doing so, the ridge 9 supporting the outer peripheral surface of the core frame 5 is also generated by vibration generated when the filter cake is discharged from the filter cake outlet 7 of the filter frame 1 and elastic deformation of the filter frame 1. By disposing on the opposite side of the filter cake discharge port 7 with a low degree of deformation, the concave groove 8 (filter frame 1) can be prevented from partially separating from the core frame 5.

Further, the filter frame 1 is composed of an arc-shaped divided body 10 divided into a plurality of parts in the circumferential direction, and an arc groove 10a in which a concave groove 8 is divided is formed on the outer edge of each divided body 10. Have.
Each divided body 10 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.

When attaching the filter frame 1 to the core frame 5, the opening D of the arc groove 10 a (concave groove 8) corresponds to one end of the core frame 5 with the vertical inner wall surface 8 a of the concave groove 8, and the core frame 5 The inner wall 8b having the ridge 9 is gradually elastically moved along the inclination of the ridge 9 only by pressing the inner peripheral side other end of the ridge 9 against the inclined surface 9a of the ridge 9 and pressing. The core frame 5 is guided into the arcuate groove 10a in the back while being spread out, the divided body 10 is attached to the core frame 5, and the inner wall 8b is elastically restored after passing through the core frame 5 so that the opening width D is the core frame width. Since the core frame 5 is held by the protrusion 9 in the arc groove 10a, the core frame 5 is prevented from being detached from the arc groove 10a.
Similarly, by attaching another divided body 10 to the core frame 5, the filter frame 1 assembled in an annular shape is supported inside the outer frame 3.

Further, the end portions 10b and 10c of the divided body 10 are formed in a concavo-convex shape that can be connected to each other, and one end portion 10b is formed in a tapered convex shape as shown in the figure, and the other end portion 10c. Is formed in a funnel-shaped concave shape matching the convex end portion 10b.
Therefore, in the filter frame 1 in which the divided bodies 10 are assembled in an annular shape as described above, these can be connected without creating a gap between the adjacent divided bodies 10, and a series of seals having good seam sealing properties as described above. The filter frame 1 can be configured between the filter plates 2 so that the same filtration as before can be performed.

In addition, the outer periphery of the filter frame 1 is restricted from being acted upon by an excessive compression pressure on the filter frame 1 between the filter plates 2 by the tightening force when the plate is closed. In order to perform the proper filtration while holding the constructed filtration chamber 11 in an optimum shape, a plurality of metal spacers 12 that are press-contacted between the filter plates 2 are provided at predetermined intervals.
This spacer 12 is formed by forming a circular flat front and rear end face into a columnar shape that forms a face 12a facing the filter plate 2, and a semi-circular portion at the middle in the front-rear direction is provided with a thin and divergent projecting piece 12b. Provided, and the wide end of the projecting piece 12b is welded and fixed at a suitable position on the outer peripheral surface of the filter frame 1.

1 Filter frame 2 Filter plate 3 Outer frame 5 Core frame 8 Groove
8a Inner wall
8b inner wall
8c Open end
8d groove bottom 9 ridge
9a slope
9b Support surface
10 divisions
10b end
10c Edge t thickness

Claims (3)

  An annular filter frame made of a rubber seal material provided on the outer periphery with a recessed groove disposed between the filter plates and supported on an annular core frame supported on the inner side of the outer frame. One of the inner wall surfaces of the inner wall is formed vertically, and an opening end of the other inner wall is inclined to the groove bottom from the opening end, and a support surface is opposed to the groove bottom through the thickness of the core frame The filter frame in the filter press characterized by providing the protrusion which has.   2. A filter frame in a filter press according to claim 1, wherein the filter frame comprises an arc-shaped divided body divided into a plurality of pieces in the circumferential direction.   3. A filter frame in a filter press according to claim 2, wherein each end portion of the divided body has a concavo-convex shape that can be connected to match each other.

Images