JP6009482B2 - Connection structure of filter cloth lower end in filter press - Google Patents

Description

  The present invention relates to a structure for connecting each lower end of a filter cloth covering front and back surfaces of a filter plate in a filter press.

Conventionally, each filter plate in a filter press is covered with a filter cloth on each of the filter surfaces on the front and back of the filter plate by hanging the filter cloth in two on a hanging rod that lies horizontally on the upper end of the filter plate. .
And the cylindrical storage part is provided in each lower end of the filter cloth on the front and back of the filter plate, and a filter cloth tensioning rod that is longer than this is inserted into the cylindrical storage part and protrudes from both ends of the cylindrical storage part. The ends facing each other through the filter plate are tied together with a string or a wire.
In this way, a pair of filter cloth tension rods on the front and back of the filter plate attached to the lower end of the filter cloth are abutted to hold the filter cloth in tension on each side of the filter plate, mainly preventing the occurrence of poor filtration. (Refer to the prior art of Patent Document 1).

However, the filter press is provided with a plurality of filter plates, and a filter cloth tension bar is inserted into the cylindrical storage portion at the lower end of each filter cloth that is suspended from above as described above. Each end of the filter cloth tension bar to be paired must be tied with a string or the like, and the attaching and detaching work is very troublesome and requires time and effort.
In order to eliminate such inconveniences, Patent Document 1 closes only the upper half of one opening in the cylindrical housing provided at the lower end of the filter cloth and substantially matches the width of the filter cloth from the opened upper half. The filter cloth tension bar of the specified length is put in and out and accommodated in the lower half part, and the filter cloth tension bar is prevented from falling off from the cylindrical accommodating part, and the filter cloth tension bar end is tied with a string or the like. A filter cloth that eliminates the need is disclosed.

JP-A-9-108509

In the filter cloth of Patent Document 1, it is not necessary to bind the pair of filter cloth tension bars, but two filter cloth tension bars are still required for one filter plate, and the filter cloth is formed at the lower end of the filter cloth. The cylindrical storage section requires at least the space for two filter cloth tension bars, and it is extremely difficult and difficult to insert and remove the filter cloth tension bar into and out of the cylindrical storage section. Is needed.
Therefore, in the present invention, without using a filter cloth tension bar, the lower end of the filter cloth can be easily held on the filter surface on the front and back of the filter plate by easily bagging the lower end of the filter cloth. It aims to provide a connection structure.

In view of the above problems, the filter cloth lower end connection structure in the filter press of the present invention is the filter cloth covering the front and back surfaces of the filter plate, and the lower end is folded back to each of the filter cloth lower ends arranged below the lower end of the filter plate. A slit formed by sliding and inserting a slit into the cylindrical body from one end opening portion in the longitudinal direction. It is characterized in that the lower end of the filter cloth is bag-bound by holding the protruding edge formed wider so as to prevent it from being pulled out through the slit.
Further, the present invention is characterized in that a reverse hook capable of hooking the protruding edge is provided on the inner side of the cylindrical body at the side end constituting the slit, or the cylindrical body is divided into a plurality of pieces.

In short, according to the present invention, in the filter cloth covering the front and back surfaces of the filter plate, the protruding edge provided on each of the lower ends of the filter cloth disposed below the lower end of the filter plate, and a single slit across the entire longitudinal direction of the side wall. A projecting edge that is wider than the slit in the cylinder, and holds and holds the protruding edge through the slit. That is, each protruding edge provided at the lower end of the filter cloth is inserted into the cylindrical body at one end in the longitudinal direction thereof. It is easy to insert the filter cloth tensioning rod into the cylindrical housing part without the need to form a cylindrical housing part at the lower end of the filter cloth as in the prior art by preventing the slide from being inserted and sliding out from the slit. The lower end of the filter cloth can be easily bound and the filter cloth can be held in tension on each side of the filter plate.
The bag binding at the lower end of the filter cloth can be released simply by sliding the cylinder body with respect to the filter cloth and pulling the cylinder away from the filter cloth. The disconnection work can be greatly improved.

  Since a drainage hole is provided between the part corresponding to the lower end of the filter plate and the protruding edge of the filter cloth, the filtrate flowing down from the filter plate during the filtration of the filter press must be collected at the lower end of the filter cloth where the bag is bound. In addition, water drainage can be improved and the load on the filter cloth can be reduced.

  Since the protruding edge is sewed with the lower end of the filter cloth folded back, it is not necessary to use a material different from the filter cloth as the protruding edge, and the sewing itself for forming the protruding edge can be made comparatively easily, so the cost can be further reduced. .

  Since the above-described reverse hook capable of hooking the protruding edge is provided inside the cylindrical body at the side end constituting the slit in the cylindrical body, the protruding edge arranged in the cylindrical body can be held more firmly inside.

  Since the cylinder is divided into a plurality of pieces, the short cylinder is easier to attach to the lower end of the filter cloth than to slide and attach a single long cylinder of the same length as the filter cloth width to the lower end of the filter cloth. Since the slide mounting and dismounting can be performed, even if there are a plurality of short cylinders, the practical effects such as being able to perform the attaching and detaching operations efficiently in a short time are significant.

It is a front view of the filter plate which coat | covered the filter cloth. It is a principal part expanded longitudinal cross-sectional view of FIG. It is a principal part expansion perspective view which shows the filter cloth lower end before a connection. It is a principal part expansion perspective view which shows the connection state of a filter cloth lower end. It is a principal part expanded side view which shows another Example.

An embodiment of the present invention will be described below with reference to the drawings.
The filter plate 1 shown in the drawing uses a filter cloth 2 (shown by a two-dot chain line in FIG. 1 for convenience of explanation) according to the present invention, and a filter frame (not shown) in the longitudinal direction of the filter press. ) Are arranged in parallel so as to intervene, and the front and back filtration surfaces (hereinafter simply referred to as front and back surfaces) are formed in a substantially square shape with a flat surface, and above the left and right side surfaces. Is provided with a support arm 4 projecting outwardly on a rail 3 arranged parallel to the left and right of the filter press so as to be able to run.

  The filter plate 1 is provided with a stock solution passage hole 5 in the center, and a plurality of filtration drainage channels 6 are provided at appropriate positions below, and each of the front and back surfaces has a circular hole corresponding to the stock solution passage hole 5 in the center. The water flow net plate 7 is fixed.

Further, a filter cloth hanging device 8 for hanging the filter cloth 2 is provided above the filter plate 1.
The filter cloth suspending device 8 has filter cloth suspending arms 9 projecting outward on the left and right sides of the upper part of the filter plate 1, and a guide bar 10 is erected on the upper end of the projecting end of the filter cloth suspending arm 9. The coiled spring material 11 is externally fitted, and the upper end of the guide bar 10 is slidably inserted into the end of the horizontal bar 12, so that the horizontal bar 12 is elastically pressed by the spring material 11 between the guide bars 10. It is built and supported so that it can move up and down.

Then, the filter cloth 2 is folded in half on the horizontal bar 12 of the filter cloth hanging device 8 so that the filter cloth 2 covers the front and back surfaces of the filter plate 1.
In the horizontal bar 12 installed between the guide bars 10, the filter cloth 2 is inserted into the eyelet (not shown) provided in the folded portion of the filter cloth 2 inside the insertion part of the guide bar 10. A pin 12a for positioning is projected upward.

  The filter cloth 2 is formed to have substantially the same width as the filter plate 1 and has a length extending from the upper side to the lower side of the filter plate 1 in a folded state. Is provided with a through hole, and is suspended by the filter cloth suspension device 8 so as to cover the filter plate 1 from above the water flow mesh plate 7 and to be inserted into the stock solution passage hole 5 of the filter plate 1. The peripheral edge of the through hole of the filter cloth 2 is sandwiched between the 13 flanges and the peripheral edge of the stock solution passage hole 5.

In the filter cloth 2, an outward protruding edge 14 is provided at each of the lower ends of the filter cloths disposed below the lower end 1 a of the filter plate.
The protruding edge 14 is sewn by folding the lower end of the filter cloth 2 outward.
A plurality of drainage holes 15 having a predetermined shape (circular in the illustrated example) are provided at predetermined intervals in the width direction between the portion corresponding to the lower end 1a of the filter plate 2 and the protruding edge 14 in the filter cloth 2. .

  Then, the lower end (protruding edge) 14 of the filter cloth 2 hung in a folded manner on the horizontal bar 12 of the filter cloth hanging device 8 is connected to the cylindrical body 16.

The cylindrical body 16 is made of plastic, preferably polypropylene, and is made of a pipe having a circular section with the same length as the width of the filter cloth 2 and open at both ends. A single slit 17 is drilled over the end) to form a C-shaped cross section.
The slit 17 is set so that each lower end (corresponding to the thickness of the two pieces of the filter cloth 2) of the filter cloth 2 suspended in half can be inserted, and the protruding edge 14 is hooked and cannot be inserted. Has been.

  Then, the filter cloth lower end is bag-bound by holding each protruding edge 14 of the lower end of the filter cloth hanging down below the lower end of the filter plate 1 through the slit 17 in the cylindrical body 16.

  That is, the inner sides of the protruding edges 14 provided on the lower end of the filter cloth are overlapped, and one ends 14a thereof correspond to one end opening 16a of the cylindrical body 16, and one end 14b of the base of the protruding edge 14 corresponds to one end 17a of the slit 17. Then, the cylindrical body 16 is slid with respect to the filter cloth 2 until one end 16a thereof coincides with one end 2a of the filter cloth 2 from the other end 2b. By preventing the removal, the lower end of the filter cloth is bound and the filter cloth 2 is held in tension on the front and back surfaces of the filter plate 1 (see FIGS. 1, 3 and 4).

  Further, the bag binding at the lower end of the filter cloth can be released (removal of the cylinder body 6) by simply sliding the cylinder body 16 with respect to the filter cloth 2 and pulling the cylinder body 16 away from the filter cloth 2.

  In addition, the drainage hole 15 is provided between the portion corresponding to the lower end 1a of the filter plate and the protruding edge 14 in the filter cloth 2 because the filter flows down from the filter drainage channel 6 of the filter plate 1 during the filtration of the filter press. Water does not collect on the lower end side of the filter cloth to be bound, but drains not only from the open left and right ends 2a and 2b, but also from each drain hole 15 to improve drainage and filter cloth. This is to reduce the burden of 2.

  The cylindrical body 16 is not composed of one piece having the same length as the width of the filter cloth 2 as described above, but may be divided into a plurality of pieces that are shorter than the width of the filter cloth 2, and thus shortened. Thus, the slide insertion / removal operation of each cylinder 16 with respect to the filter cloth 2 can be performed quickly and more easily.

  FIG. 5 shows another example of the cylindrical body 16. In this cylinder 16, a barb 18 that can be hooked by the protruding edge 14 is provided on the inner side of the cylinder 16 at the side end 17 b constituting the slit 17, and is arranged in the cylinder 16. The protruding edge 14 is held more firmly in its interior.

  In the present embodiment, the connection structure of the lower end of the filter cloth 2 suspended in two on the filter plate 1 used in the double filter press is shown. However, in the present invention, a single type without using a filter frame is shown. Naturally, it can be applied to the filter plate of the filter press.

1 Filter plate
1a Lower end of filter plate 2 Filter cloth
14 Projection
15 Drainage hole
16 cylinder
17 Slit
17b side edge
18 Reverse

Claims (3)

In the filter cloth covering the front and back surfaces of the filter plate, a protruding edge formed by folding and sewing the lower end of each lower end of the filter cloth disposed below the lower end of the filter plate, and a slit in the longitudinal direction of the side wall The bottom end of the filter cloth is formed by holding a protruding edge formed wider than the slit formed by sliding the cylindrical body through one end opening in the longitudinal direction thereof. A connection structure at the lower end of the filter cloth in the filter press, wherein the bag is bound.   The connection structure of the lower end of the filter cloth in the filter press according to claim 1, wherein the cylindrical body is divided into a plurality of pieces.   The connecting structure of the lower end of the filter cloth in the filter press according to claim 1, wherein a reverse hook capable of hooking the protruding edge is provided on the inner side of the cylindrical body of the side end constituting the slit in the cylindrical body.

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