JPH0534042B2 - - Google Patents

Description

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

(Prior art) As a filter plate of a filter press, an inner protruding edge portion having a thickness smaller than the frame portion is formed on the inner periphery of the frame portion of a hollow frame body via a stepped portion, and the frame body is attached to this inner protruding edge portion. It is known that the outer periphery of a net plate covering the hollow part is fixed. For example, in Japanese Utility Model Application Publication No. 62-99308, the mesh plate is formed to have an area slightly smaller than the hollow part of the frame, and one end of two elastic clamping plates, front and back, is fixed to the end of the mesh plate. , has been disclosed in which the inner protrusion of the frame is elastically clamped at the other end.

(Problems to be Solved by the Invention) However, in the conventional filter plate described above, a net made of wire or synthetic fiber yarn is stretched over a metal mesh frame, and each of the mesh plates is provided at multiple locations on the outer periphery of the mesh plate. Since the two elastic clamping plates, front and back, are fixed, the number of manufacturing steps is large, and the mesh plate is heavy and hard, so it is difficult to bend the mesh plate when attaching or removing it from the frame. Furthermore, since elastic clamping plates are fixed to the front and back sides of the outer periphery of the mesh plate, the thickness of these parts increases, which causes problems such as localized abnormal tension in the filter cloth, making it susceptible to breakage.

The present invention provides a filter plate that is easy to manufacture, light, and flexible, and in which a filter bed plate such as a mesh plate can be easily attached to and detached from a frame.

(Means for Solving the Problems) The filter plate of the present invention has an inner protruding edge portion having a thickness smaller than the frame portion formed on the inner periphery of the frame portion of a hollow frame via a stepped portion, and the inner protruding edge portion having a thickness smaller than the frame portion. Synthetic resin plate on the edge,
The outer peripheral edge of a filter bed plate made of an elastic board such as a plywood board and capable of covering the hollow part of the frame is removably attached, and the filter bed plate has a number of tongues formed by making cuts around it. The frame body is characterized in that the tongue pieces are bent alternately to the front side and the rear side, and the inner projecting edge of the frame body is elastically held between the tongue pieces that are opened in the front and back. do.

The shape of the hollow frame may be either rectangular or circular. A stock solution supply port and a filtrate discharge port may be provided at the peripheral edge of the frame to provide a side feed type, or a stock solution supply port may be provided at the center of the filter bed plate to provide a center feed type.

The elastic plate forming the filter bed plate has flexibility and elasticity to the extent that the filter bed plate does not break or crack and returns to its original shape when the filter bed plate is bent when attaching the filter bed plate to the frame body. Preferred examples include synthetic resins such as polypropylene and polyvinyl chloride, and veneers, with a preferred thickness of 1 to 4 mm.

The above-mentioned filter bed plate may be a flat plate, a perforated plate, or an uneven plate, or may have a mixture of holes and unevenness, and a single filter may be formed by stacking two sheets, the front filter bed plate and the rear filter bed plate. It can be used as a floor plate, and in this case, a large number of notches and tongues are arranged around each of the front and rear filter plates alternately and correspond to the notches on one of the filter plates. The tongue pieces of the other filter bed plate are formed out of phase so that the notches of the other filter bed plate are located corresponding to the tongue pieces of one filter bed plate.

(Operation) When a large number of tongues are opened front and back alternately and the inner protruding edge of the frame is inserted between the front and rear opened tongues, the filter bed plate is held against the frame by the clamping force due to the elasticity of the tongues. Fixed. Further, when the filter bed plate is fixed to the frame, when one side of the filter bed plate is pressed, the tongue piece on this one side side curves and comes off the inner protrusion, and the filter bed plate is removed.

(Example) The first example shown in Figs. 1 and 2 shows an example of a center feed type using a single perforated filter bed plate, and a rectangular frame 1 is fixed to the upper end thereof. It is slidably mounted on the left and right guide rails 3 via the support beam 2 and shoe 2a. The frame 1 is provided with an inner protruding edge portion 1b having a wedge-shaped cross section and a thickness smaller than that of the frame portion 1a on the inner periphery of the frame portion 1a via step portions on both the front and back surfaces, and filtrate drainage at the four corners. An outlet 1c is provided. The filter bed plate 5 is a polypropylene plate with a thickness of 2 mm, in which holes 5a with a diameter of 5 mm are perforated vertically and horizontally at intervals of 20 mm, and a stock solution supply port 5b is provided in the center. It is made to have a wider area than the other parts, and has a large number of cuts 5c on its outer periphery. And the above cut 5c
The tongue pieces 5d at the four corners formed by are bent toward the back side of the paper in FIG. 1, and the adjacent tongue pieces 5e are bent toward the front side of the paper. The inner protruding edge portion 1b of the frame body 1 is held. In FIG. 2, F is a filter cloth, which is hung above the support beam 2, covers both sides of the filter bed plate 5, and the front and back filter cloths F, F are sewn along the edge of the stock solution supply port 5b. has been done.

The second embodiment shown in FIGS. 3 and 4 shows an example of a side feed type in which two porous filter bed plates are stacked, and an upward protrusion 11a is provided at the center of the upper side of a rectangular frame 11. Also, lower ear parts 11b, 1 on the left and right sides of the lower side.
1b are respectively formed, and a support arm 12 is provided protruding from the center of the left and right sides, and the support arm 12,
12 through guide rail (not shown)
It is slidably mounted on the top. An inner protruding edge part 11d is formed along the inner periphery of the frame part 11c of the frame 11, and a stock solution supply port 11e is formed in the protruding edge part 11a.
However, there are also filtrate discharge ports 1 in the lower ear parts 11b on the left and right sides of the lower side.
1f and 11f are bored respectively. The front filter bed plate 13 and the rear filter bed plate 14 are made of polypropylene similar to the filter bed plate 5 in FIG.
3 has tongue pieces 1 at each of the four corners and the center of each side.
3a and 13b, these tongue pieces 13a,
A notch is formed between 13b. On the other hand, the rear filter bed plate 14 has notches at the four corners and the center of each side, and is provided with tongue pieces 14a at two locations on the left and right sides of each side, at positions corresponding to the notches in the front filter bed plate 13.
Then, the tongue pieces 13a and 13b of the front filter bed plate 13 are bent rearward and come into contact with the back surface of the inner projecting edge 11d of the frame body 11, and the tongue piece 14a of the rear filter bed plate 14 is bent forward and inward. It comes into contact with the front surface of the projecting edge 11d. In addition, a similar stock solution supply port is opened in the part of the filter cloth F facing the stock solution supply port 11e, and a filter cloth gripping plate described in Japanese Utility Model Publication No. 62-99308 etc. is installed in this part. is installed.

The third embodiment shown in FIGS. 5 and 6 is a filter bed plate 21 having a large number of small protrusions 21a on both the front and back surfaces, and a number of cuts 21b are made around the periphery to form tongues 21c. In addition, the small protrusion 2 mentioned above
1a is provided by integral molding, or by gluing or screwing separately molded square rods.

The fourth embodiment shown in FIGS. 7 and 8 has a front filter bed plate 22 with a large number of small protrusions 22a and large protrusions 22b on the front surface, and a large number of small protrusions 23a on the rear surface.
and a rear filter bed plate 23 provided with large protrusions 23b are used, and around the front filter bed plate 22 and rear filter bed plate 23, there are tongue pieces 22c, respectively.
and 23c are the notches 2 as in the second embodiment.
2d and 23d are formed alternately. The large protrusions 22b, 23b are for reinforcement, and when the front and rear filter plates 22, 23 are overlapped, the total thickness of the large protrusions 22b, 23b is equal to the thickness of the frame portion of the frame 25. Set.

(Effects of the Invention) This invention provides an elastic filter plate inside a hollow frame body in place of a conventional mesh plate, and tongue pieces formed along the outer periphery of the plate are alternately bent, and these tongue pieces are used to filter the frame body. Since it is attached by sandwiching the inner protruding edge, the filter bed plate can be manufactured with extremely fewer man-hours than conventional mesh plates, and the filter bed plate mounted on the frame can be easily attached and detached. Light, not bulky, and easy to handle.

[Brief explanation of drawings]

FIG. 1 is a front view of the first embodiment of this invention, and FIG.
The figure is a sectional view taken along the line - in Fig. 1, Fig. 3 is a front view of the second embodiment, and Fig. 4 is a sectional view taken along the - line in Fig. 3.
FIG. 5 is a front view of the third embodiment, FIG. 6 is a sectional view taken along the - line in FIG. 5, and FIG. 7 is a front view of the fourth embodiment.
FIG. 8 is a sectional view taken along the - line in FIG. 7. 1, 11: Frame body, 1a, 11c: Frame part, 1
b, 11d: Inner protrusion, 5, 13, 14, 2
1, 22, 23: filter bed plate, 5d, 5e, 13a,
13b, 14a, 21c, 22c, 23c: tongue pieces.

Claims (1)

[Scope of Claims] 1. An inner protruding edge portion having a thickness smaller than the frame portion is formed on the inner periphery of the frame portion of the hollow frame via a stepped portion,
The outer circumferential edge of a filter bed plate made of an elastic board such as a synthetic resin board or a plywood board and capable of covering the hollow part of the frame is removably attached to this inner projecting edge. It has a large number of tongue pieces formed by making cuts, and the tongue pieces are bent alternately to the front side and the rear side, and the inner projecting edge of the frame body is placed between the tongue pieces opened in the front and back. A filter plate for a filter press characterized by being elastically clamped. 2. The filter bed plate is formed by stacking two sheets, a front filter bed plate and a rear filter bed plate, and a large number of notches and tongue pieces are alternately arranged around the front and rear filter bed plates, and the notch part of the front filter bed plate is 2. The tongue piece of the rear filter bed plate is formed in a phase-shifted manner so that the tongue piece of the rear filter bed plate is positioned correspondingly to the tongue piece of the rear filter bed plate, and the notch part of the rear filter bed plate is positioned corresponding to the tongue piece of the front side filter bed plate. Filter plate of filter press.