JPH024323B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a squeeze filter plate for a filter press.

BACKGROUND ART Conventionally, in order to increase the strength of a filter plate of a filter press, for example, as shown in FIG. 3, spacing protrusions 35, 36 are provided, and the protrusions 35, 36 of the compressed filter plate 31 and the ordinary filter plate 32 that are adjacent to each other
These protrusions 35 and 36 are brought into surface contact so that the uneven pressure applied to the filtering surface is received by these protrusions 35 and 36. However, in the conventional compressed filter plate 31, the spacing protrusions 35 are integrally provided on the base plate 33 and are arranged inside the rubber plate 34, so that the protrusions 35 of the compressed filter plate 31 are Since the rubber plate 34 is interposed between the protrusion 36 of the filter plate 32,
There was a problem in that the protrusion contact portion 34a of the rubber plate 34 was torn due to the uneven pressure applied to the filter surface.

By the way, a compressed filter plate of a filter press in which a hard spacing member for receiving the spacing protrusion of an adjacent ordinary filter plate is arranged in the center of the filtering surface of a rubber plate has already been known (for example, in 1983). −
(Refer to Publication No. 11928), with conventional press filter plates, the sealing of the mounting part of the spacing member is not sufficient, and there is a risk of squeezed fluid leaking, and a large number of bolts are used to attach the spacing member. Therefore, there were problems in that it took time and effort to drill bolt holes in the board, and the number of parts increased.

Purpose of the Invention The purpose of the present invention is to solve the above-mentioned problems, to completely seal the mounting part of the spacing member, and to efficiently carry out filtration work over a long period of time without any fear of leakage of squeezed liquid. To provide a filter plate for a filter press, which can be used in a filter press, and which requires a very small number of bolts and nuts for attaching a spacing member, thereby reducing the labor of drilling bolt holes in a substrate. I'm trying.

Structure of the Invention In order to achieve the above object, the present invention includes a substrate and a rubber plate that is placed on both sides of the substrate and has filtrate grooves on the filtration surface, and corresponds to the spacing protrusion of adjacent ordinary filter plates. In a compressed filter plate of a filter press, in which bulges are provided on both the front and back sides of the substrate at required locations, and mountain-like portions are provided on the rubber plate along each bulge, each bulge on the substrate is A recessed portion is provided at the top of the recessed portion, an annular engagement recessed portion is provided at the inner end of the peripheral wall of the recessed portion, and the size is such that it fits into the top wall of each mountain-like portion of the rubber plate along the peripheral wall of the recessed portion. The cylindrical fitting part is provided so as to be continuous inwardly at a right angle to the top wall of the cylindrical part, and the inner peripheral surface of the cylindrical fitting part is tapered so that the diameter becomes smaller toward the inside. At the tip of the shaped fitting part, an engaging convex part is provided on the outside thereof at a substantially right angle, and in each concave part, there is a cylindrical fitting part having an engaging convex part, and a cylindrical fitting part having an engaging convex part on the outer circumferential surface, which tapers toward the inner end. The tapered hard spacing members are fitted, and the spacing members on both sides of the board are connected to each other, so that the tapered outer peripheral surface of each spacing member fits into the tapered inner surface of the cylindrical fitting part. A compression filtration device for a filter press in which the spacing member 10 is pressed against the circumferential surface, the engaging convex portion is fitted into the engaging concave portion, and the outer end portion of the spacing member 10 is made to protrude from the top surface of the bulging portion by a required height. The board is the gist.

Embodiments Next, embodiments of the present invention will be described based on the drawings.

In the drawings, reference numeral 1 indicates a compressed filter plate of the filter press according to the present invention, and reference numeral 2 indicates an ordinary filter plate integrally provided with spacing protrusions 19 at predetermined locations, and these filter plates 1 and 2 are arranged alternately. .

The compressed filter plate 1 includes a substrate 3 and a rubber plate 4 which is placed on both sides of the substrate 3 and has filtrate grooves 6 on the filtration surface 5. 7 are space maintaining protrusions 19 of adjacent ordinary filter plates 2 at four locations on both the front and back surfaces of the substrate 3.
The rubber plate 4 is a bulge provided to correspond to the
A mountain-shaped portion 4a is provided along these bulging portions 7. Reference numeral 8 denotes a concave portion provided at the top of each bulging portion 7, and an annular engagement concave portion 11 is provided at the inner end of the peripheral wall of the concave portion 8.
c is provided. 9 is each mountain-shaped portion 4 of the rubber plate 4
These are cylindrical fitting portions provided on the top wall of a so as to be connected inwardly at a substantially right angle, and these are sized to fit along the circumferential wall of the recessed portion 8, and
An annular engagement convex portion 9c that extends outward at a substantially right angle at the tip.
Further, the inner circumferential surface 24 of the cylindrical fitting portion 9 is tapered so that the diameter becomes smaller toward the inside.
Note that both the recessed portion 8 and the cylindrical fitting portion 9 fitted therein are circular when viewed from the front;
Both of these may have the same square shape.

Reference numeral 10 denotes a pair of spacing members made of a hard material such as metal or synthetic resin having a predetermined thickness, and the outer peripheral surfaces 23 of these members are tapered toward the inner end. Each of the spacing members 10 is fitted into the recesses 8 of all the bulges 7 on both sides of the substrate 3 while being housed in the cylindrical fitting portion 9 of the rubber plate 4.
The tapered outer circumferential surface 23 of is brought into pressure contact with the tapered inner circumferential surface 24 of the cylindrical fitting part 9, and the engaging protrusion 9c is fitted into the engaging recess 11c,
The outer end of each spacing member 10 has a bulge 7 so that the top wall of the mountain-shaped portion 4a of the rubber plate 4 can be elastically deformed.
It is made to protrude outward from the top surface by a required height.

12 is a tightening bolt that passes through the pair of spacing members 10 fitted in the recessed portion 8 and the substrate 3;
A nut 13 is screwed onto the tip of this, and the pair of spacing members 10 are connected to each other with the substrate 3 sandwiched therebetween by these bolts 12 and nuts 13. The head 12a of the bolt 12 and the nut 13 are each accommodated in a recess 14 provided at the outer end of the spacing member 10 so as not to protrude outward. 25 is the engagement recess 11c of the recess 8
A cross section V provided around this on the peripheral wall of
A pair of annular grooves for sealing.

The ordinary filter plate 2 has the same structure as the conventional one,
This has spacing protrusions 19 integrally provided at predetermined intervals on a substrate 18. 20 is a filter cloth, which covers both sides of the compressed filter plate 1 and both sides of the ordinary filter plate 2, respectively.

In the above, when the filter press is in the closed state, the spacing-maintaining protrusions 19 of the normal filter plate 2 and the hard spacing-maintaining member 10 of the compressed filter plate 1 are butted against each other, and the protrusions 19 and the spacing-maintaining protrusions 19 Part 1
0, no rubber plate 4 is interposed therebetween. When filtration work is performed in this state, the uneven pressure generated within the filtration surface can be received by the protrusion 19 and the spacing member 10, and no uneven pressure is applied to the rubber plate 4, so the rubber plate 4 There is no risk of tearing, and since the spacing member 10 is made of a hard material such as metal, the pressing filter plate 1 can withstand long-term use.

Furthermore, the spacing members 10 are fitted into the recesses 8 of the bulges 7 on both sides of the substrate 3, and their outer ends protrude only slightly outward from the top surface of the bulges 7. , Removal of the cake (filter slag) after filtration is easy, and the cake easily falls off.

Furthermore, within the recessed portion 8, the spacing member 1
The tapered outer circumferential surface 23 of 0 is brought into pressure contact with the tapered inner circumferential surface 24 of the cylindrical fitting part 9, and
The engaging convex portion 9c is fitted into the engaging concave portion 11c, whereby the cylindrical fitting portion 9 and the engaging convex portion 9
c and the inner surface of the recessed portion 8 are reliably sealed.
In addition, the cylindrical fitting part 9 is provided so as to extend inward at a substantially right angle to the mountain-like part 4a of the rubber plate 4, and the engaging convex part 9c is provided at a substantially right angle to the outside with respect to the cylindrical fitting part 9. Therefore, the squeezed liquid that enters between the top wall of the mountain-shaped portion 4a of the rubber plate 4 and the top of the bulging portion 7 is disposed perpendicularly to the direction in which the liquid enters. The squeezed liquid is received at the end of the cylindrical fitting part 9 and the pressure is significantly reduced, and furthermore, this squeezed liquid is pumped between the outer surface of the cylindrical fitting part 9 and the peripheral wall of the recessed part 8. However, this pressure is received by the engagement convex portion 9c arranged substantially perpendicular to the direction in which the squeezed fluid enters, so that the pressure is further reduced significantly. In this case, the tapered outer circumferential surface 23 of the spacing member 10 is strongly pressed against the tapered inner circumferential surface 24 of the cylindrical fitting part 9 of the rubber plate 4 within the concave portion 8, thereby achieving an even more complete seal. It is possible to completely prevent the squeezed liquid from entering, and no leakage of the squeezed liquid occurs. Therefore, it is possible to reliably prevent the squeezed liquid from leaking during the press filtration operation, and the filtration operation can be carried out efficiently over a long period of time.

Effects of the Invention As described above, the present invention provides the substrate 3 and the substrate 3.
and a rubber plate 4 which is placed on both sides of the substrate and has filtrate grooves 6 on the filtration surface 5, and bulges on both the front and back sides at required locations of the substrate 3 so as to correspond to the spacing retaining protrusions 19 of the adjacent ordinary filter plate 2. In the compressed filter plate of the filter press in which the rubber plate 4 is provided with a convex portion 7 and a mountain-like portion 4a along each convex portion 7, a concave portion 8 is provided at the top of each convex portion 7 of the substrate 3. An annular engagement recess 1 is provided at the inner end of the peripheral wall of the recess 8.
1c is provided, and a cylindrical fitting part 9 of a size that fits into the top wall of each mountain part 4a of the rubber plate 4 along the circumferential wall of the recessed part 8 is provided inside the top wall of the mountain part 4a. The inner circumferential surface 24 of the cylindrical fitting part 9 is tapered so that the diameter becomes smaller toward the inside. A cylindrical fitting part 9 which is provided with a series of engagement protrusions 9c and has an engagement protrusion 9c in each recessed part 8;
A hard spacing member 10 tapered toward the inner end is fitted into the outer circumferential surface 23, and the spacing members 10 on both sides of the substrate 3 are connected to each other, so that each spacing member 10 The tapered outer peripheral surface 23 is the tapered inner peripheral surface 2 of the cylindrical fitting part 9.
4, the engagement protrusion 9c is fitted into the engagement recess 11c, and the outer end of the spacing member 10 is made to protrude from the top surface of the bulge 7 by a required height. , the tapered outer circumferential surface 23 of the spacing member 10 within the concave portion 8
is brought into strong pressure contact with the tapered inner circumferential surface 24 of the cylindrical fitting part 9, and the engaging protrusion 9c is fitted into the engaging recess 11c, whereby the cylindrical fitting part 9 and the engaging protrusion The space between the portion 9c and the inner surface of the recessed portion 8 is reliably sealed. Moreover, the mountain-like part 4 of the rubber plate
A cylindrical fitting part 9 is provided so as to extend inwardly at a substantially right angle to the cylindrical fitting part 9, and an engaging convex part 9c is provided to extend substantially perpendicularly outwardly to the cylindrical fitting part 9. The squeezed liquid that has entered the gap between the top wall of the mountain-shaped portion 4a of the rubber plate 4 and the top of the bulging portion 7 due to the squirrel is absorbed into the cylindrical fitting portion 9 and the engaging convex portion 9c. As a result, the pressure is significantly reduced, and a complete seal can be achieved by strong pressure contact between the tapered outer circumferential surface 23 of the spacing member 10 and the tapered inner circumferential surface of the cylindrical fitting portion 9. Therefore, there is no fear of leakage of the squeezed liquid, and filtration work can be carried out efficiently over a long period of time.
Further, the number of bolts 12 and nuts 13 for attaching the spacing member 10 can be reduced to just one each as shown in the embodiment, and the labor required for drilling bolt holes in the substrate 3 can be reduced. It has the effect of being able to.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of a compressed filter plate showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view taken along the line of FIG. 1, with ordinary filter plates shown on both sides. FIG. 3 shows a conventional example, and is an enlarged sectional view of a filter plate corresponding to FIG. 2. DESCRIPTION OF SYMBOLS 1... Press filter plate, 2... Ordinary filter plate, 3... Substrate, 4... Rubber plate, 4a... Mountain-like part, 5... Filtration surface, 6... Filtrate groove, 7... Bulging part , 8... Recessed part, 9... Cylindrical fitting part, 9c... Engaging convex part, 10
... Spacing member, 11c... Engagement recess, 12...
... Bolt, 13 ... Nut, 16, 21 ... Annular groove for sealing, 17, 22 ... O-ring (sealing member), 18 ... Board, 19 ... Spacing retaining protrusion,
23... Tapered outer circumferential surface, 24... Tapered inner circumferential surface.

Claims (1)

[Claims] 1 comprises a substrate 3 and a rubber plate 4 which is placed on both sides of the substrate 3 and has filtrate grooves 6 on the filtration surface 5; There are bulges 7 on both the front and back sides of the
In the compressed filter plate of the filter press in which the rubber plate 4 is provided with a mountain-shaped portion 4a along each bulging portion 7, a concave portion 8 is provided at the top of each bulging portion 7 of the substrate 3. , an annular engagement recess 11c is provided at the inner end of the peripheral wall of the recessed part 8, and a cylindrical fitting of a size that fits into the top wall of each mountain-like part 4a of the rubber plate 4 along the peripheral wall of the recessed part 8. The fitting portion 9 is provided so as to be continuous inwardly at a right angle to the top wall of the mountain-shaped portion 4a, and the inner circumferential surface 24 of the cylindrical fitting portion 9 is tapered so that the diameter becomes smaller toward the inside. At the tip of the shaped fitting part 9, there is an engaging convex part 9c extending approximately perpendicularly to the outside thereof.
A cylindrical fitting part 9 having an engaging convex part 9c is provided in each concave part 8, and a hard spacing member 10 tapered toward the inner end on the outer circumferential surface 23. are fitted, and the spacing members 10 on both sides of the substrate 3 are coupled to each other, so that the tapered outer circumferential surface 23 of each spacing member 10 forms a cylindrical fitting portion 9.
At the same time, the engagement protrusion 9c is fitted into the engagement recess 11c, and the outer end of the spacing member 10 protrudes from the top surface of the bulge 7 by a required height. The compressed filter plate of the filter press.