JPH0118763B2 - - 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 concave part is provided at the top of the rubber plate, and a cylindrical fitting part of a size that fits into the top wall of each convex part of the rubber plate along the circumferential wall of the concave part is provided inside the top wall of the convex part. A cylindrical fitting part and an inner end are provided in each concave part, and a cylindrical fitting part and an inner end part are provided at the distal end of the cylindrical fitting part. A hard spacing member having an annular engagement recess is fitted, and the spacing members on both sides of the substrate are coupled to each other, so that the engagement protrusion is fitted into the engagement recess, and the outer part of the spacing member is fitted. The end portion is made to protrude from the top surface of the bulging portion by a required height, and sealing annular grooves are provided on the peripheral wall and bottom wall of the recessed portion, respectively, and the sealing member fitted into these grooves is The gist is a compressed filter plate of a filter press that is pressed against the outer surface of a cylindrical fitting portion of a rubber plate and the outer surface of an engaging convex portion.

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. 8 is a concave portion provided at the top of each bulging portion 7; 9 is a cylindrical fitting portion provided on the top wall of each mountain portion 4a of the rubber plate 4 so as to extend inwardly at a substantially right angle; These have a size that fits along the circumferential wall of the recessed portion 8, and have an annular engaging convex portion 9a extending inward at a substantially right angle at the tip.
Note that, although both the recessed portion 8 and the cylindrical fitting portion 9 fitted therein have a circular shape when viewed from the front, they may both 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. The outer end of each spacing member 10 is bulged 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 of the portion 7 by a required height. An annular engagement recess 11 a is provided at the inner end of the spacing member 10 , and this includes an engagement protrusion 9 at the tip of the cylindrical fitting part 9 .
a are fitted together. Reference numeral 12 denotes a tightening bolt that passes through the pair of spacing members 10 fitted in the concave portion 8 and the substrate 3, and a nut 13 is screwed onto the tip of this bolt. The spacing members 10 are coupled to each other with the substrate 3 sandwiched therebetween. 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. Reference numeral 21 denotes one relatively large sealing annular groove with a cross-sectional shape provided around the circumferential wall of the recessed portion 8, into which a relatively large O-ring 22 is fitted. Reference numeral 16 denotes one relatively small sealing annular groove having a cross-sectional shape provided in the bottom wall of the recessed portion 8, into which a small O-ring 17 is fitted.

The ordinary filter plate 2 has the same structure as the conventional one,
This has spacing protrusions 19 integrally provided at predetermined locations on the 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, in the recessed part 8, a part of the rubber constituting the cylindrical fitting part 9 and the engaging convex part 9a of the rubber plate 4 is pressed by the spacing member 10, and the sealing annular grooves 21 and 16 are pressed by the spacing member 10, respectively. As it is pushed inside,
Since the outer surface of the cylindrical fitting portion 9 and the outer surface of the engagement protrusion 9a are strongly pressed against the O-rings 22 and 17, respectively, the cylindrical fitting portion 9, the engagement protrusion 9a, and the inner surface of the concave portion 8 are The space between the two is securely sealed. In addition, the cylindrical fitting portion 9 is provided so as to extend inwardly at a substantially right angle to the mountain-like portion 4a of the rubber plate 4, and furthermore, the engaging convex portion 9a is provided to extend substantially perpendicularly to the cylindrical fitting portion 9. Since the mountain-shaped portion 4a of the rubber plate 4
The squeezed liquid that has entered the gap between the top wall of the bulge and the top of the bulging part 7 is received by the end of the cylindrical fitting part 9, which is arranged perpendicular to the direction in which the liquid enters, and its pressure is significantly reduced. Furthermore, this squeezed liquid enters the gap between the outer surface of the cylindrical fitting part 9 and the peripheral wall of the recessed part 8;
Even if it were to pass through this, the pressure would be absorbed by the bottom wall of the concave portion 8, which is arranged approximately at right angles to the direction in which the squeezed liquid enters. is further significantly reduced, and the O-ring 1 provided on the bottom wall of the recessed portion 8
7 and the outer surface of the engaging convex portion 9a can finally and completely prevent the squeezed fluid from entering, and no leakage of the squeezed fluid will occur.
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. A concave portion 8 is provided on the top wall of each mountain-like portion 4a of the rubber plate 4.
A cylindrical fitting portion 9 sized to fit along the peripheral wall of the
are provided so as to extend substantially perpendicularly inwardly to the top wall of the mountain-like portion 4a, and an engaging convex portion 9a is provided at the tip of the cylindrical fitting portion 9 to extend substantially perpendicularly inwardly to the top wall of the cylindrical fitting portion 9;
A hard spacing member 10 having a cylindrical fitting part 9 and an annular engaging recess 11a at the inner end in each concave part 8
are fitted into the spacing members 10 on both sides of the substrate 3.
The members are connected to each other, and the engaging protrusion 9a is fitted into the engaging recess 11a, 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. , sealing annular grooves 21 and 16 are provided in the peripheral wall and bottom wall of the concave portion 8, respectively, and the sealing members 22 and 17 fitted into these grooves 21 and 16 engage the cylindrical fitting of the rubber plate 4. Since the outer surface of the portion 9 and the outer surface of the engagement convex portion 9a are pressed against each other, a part of the rubber inside the recessed portion 8 is pressed by the spacing member 10 and the sealing annular grooves 15, 21 are pressed against each other. At the same time, the outer surface of the cylindrical fitting portion 9 and the outer surface of the engaging convex portion 9a are strongly pressed against the sealing materials 22 and 17, respectively, so that the cylindrical fitting portion 9 and the engaging convex portion 9a are The space between the inner surface of the recessed portion 8 and the inner surface is reliably sealed. Moreover, the cylindrical fitting portion 9 is provided so as to be continuous at a substantially right angle to the mountain-like portion 4a of the rubber plate 4, and the engaging convex portion 9a is further provided to be continuous to the cylindrical fitting portion 9 at a right angle. Therefore, the pressure of the squeezed liquid that has entered the gap between the top wall of the mountain-like portion 4a of the rubber plate 4 and the top of the bulging portion 7 is significantly reduced, and the pressure of the squeezed fluid is greatly reduced, and 9 and the engagement convex portion 9a 2
Complete sealing can be achieved by the two sealing materials 22 and 17, and 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, 9a... engaging convex part, 10
... Spacing member, 11a... Engagement recess, 12...
... Bolt, 13... Nut, 16, 21... Annular groove for sealing, 17, 22... O-ring (sealing member), 18... Base plate, 19... Spacing retaining protrusion.

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. , each mountain-shaped portion 4 of the rubber plate 4
A cylindrical fitting part 9 of a size that fits along the circumferential wall of the recessed part 8 is provided on the top wall of the mountain part 4a so as to extend inward at a substantially right angle to the top wall of the mountain part 4a. An engaging convex portion 9a is provided at the tip of the joint portion 9 and is connected at a substantially right angle inside the joint portion 9, and each concave portion 8 has a cylindrical engaging portion 9 and an annular engaging recess 11a at the inner end thereof. The spacing members 10 on both sides of the substrate 3 are connected to each other, and the engaging protrusions 9a are fitted into the engaging recesses 11a, and the outer ends of the spacing members 10 are fitted. The part is the bulging part 7
The peripheral wall and bottom wall of the recessed portion 8 are provided with annular sealing grooves 21 and 16, respectively, and these grooves 21 and 16
A compressed filter plate for a filter press in which seal members 22 and 17 fitted therein are brought into pressure contact with the outer surface of a cylindrical fitting portion 9 of a rubber plate 4 and the outer surface of an engaging convex portion 9a.