JPH05103914A - Compression plate and compression membrane for filter press - Google Patents

Abstract

PURPOSE:To provide a compression plate and a compression membrane for a filter press where protective members are easy to handle, attach and detach and which have structure of a filtrate discharge hole part with excellent strength. CONSTITUTION:Into an attached recessed part 11 in the shape of a dovetail groove installed in a casing 2a of a compression membrane 2, a protective member 10 in the shape of a dovetail tenon is inserted from the inside of the casing 2a to repulsively engage outer circumferential surfaces 10a, 10b of the outer circumferential member 10 with an inner circumferential surface 11b of the attached recessed part 11, causing the two to be unified by a dovetail groove joining. By the dovetail groove joining, positioning of the protective member 10 to the attached recessed part 11 is surely made with hardly causing dislocation to stably hold the protective part 10. The route of a filtrate discharge part communicates with a filtrate discharge passage 6 through filtrate holes 14, 15 of the protective member 10, a hole part 13 of the compression membrane 2 and a filtrate discharge hole 12 of a base plate 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a squeezing plate of a filter press and a squeezing membrane of the squeezing plate, and more particularly to a structure of a filtrate discharging section having a removable protection member.

[0002]

2. Description of the Related Art There are various conventional pressing plates of this type, and the applicant has already proposed a structure as shown in FIG. 10 (see Japanese Patent Publication No. 58-15004). This pressing plate has a pressing film b made of a flexible airtight sheet provided on both sides of a substrate a, and the structure of the filtrate discharging part in the pressing film b corresponds to the filtrate discharging hole c of the substrate a. A hole d is provided in the portion to be formed, and the protection member e is integrally attached to this portion.

As shown in FIGS. 11 (b) and 11 (c), the protective member e has a liquid guiding plate g integrally laminated on the front surface side of a thin core plate f and a backup plate on the rear surface side. h is integrally laminated. The core plate f is provided with a filtrate hole i for guiding the filtrate to the filtrate discharge hole c of the substrate a, and its outer peripheral portion is used as a mounting flange j. Then, the mounting flange j is inserted into the insertion groove k (see FIG. 11A) in the hole portion d of the compressed film b, and the protection member e is integrated with the compressed film b. Correspondingly, the hole d has an annular step l, and the large diameter part m
And a small-diameter portion n has a two-stage structure.

[0004]

However, such a structure has various problems as listed below.
The improvement was demanded. (1) It is difficult to insert the mounting flange j of the protection member e into the insertion groove k, and it is difficult to mount the protection member e.

(2) A high pressure is applied to the protective member e, but since the core plate f is thin, the strength is insufficient,
Easy to bend. (3) With the protective member e attached, the above insertion groove k
If the mounting flange j and the mounting flange j are not accurately aligned and sufficiently positioned, when a high pressure is applied to the protection member e, the protection member e starts to move and easily comes off from the compressed film b.

The present invention has been made in view of the above conventional problems, and provides a filter press having a structure of a filtrate discharge hole portion in which the protection member can be easily handled and attached / removed, and the strength is excellent. The purpose is to provide a pressing board.

[0007]

In order to achieve the above object, the squeezing plate of the present invention comprises a squeezing membrane arranged on both sides of a substrate, and a hole portion communicating with a filtrate discharging hole of the substrate. A mounting recess is provided around the front surface of the hole so as to face the inside of the frame, and the mounting recess has a dovetail-shaped cross-sectional shape when viewed from the inside of the frame, and the protection member is provided. Is a flat plate having a thickness almost the same as the depth of the mounting recess, the planar shape of which corresponds to the contour of the mounting recess, and the cross-sectional shape of which is a dovetail groove of the mounting recess. Formed into an ant shape corresponding to the shape, a filtrate inlet opening facing the inside of the frame of the squeezing membrane is provided in the front part of the protective member, and the filtrate inlet is provided on the back side of the protective member. The communicating recess is provided so as to face the hole of the squeeze membrane. To.

The filtrate inlet is opened so as to face both the inside and the surface side of the frame of the compressed film.

[0009]

When the protection member having a dovetail-shaped cross section is inserted from the inside of the frame of the compressed film into the mounting recess formed in the frame of the compressed film in a dovetail groove shape,
The outer peripheral surface of the protective member and the inner peripheral surface of the mounting recess are engaged with each other, and the two are integrated by dovetail groove coupling. Because of this dovetail groove coupling, that is, the engagement of the inclined surfaces, the positioning of the protective member with respect to the mounting recess is reliable and the deviation is unlikely to occur, so that the protective member is stably held.

The attachment of the protective member to the squeeze membrane is
It does not matter whether the compressed film is attached to the substrate or not. The filtrate introduction port of the protective member is opened so as to face both the inside and the surface side of the frame of the compressed film, so that the filtrate can be smoothly introduced from the surface of the compressed film.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. A squeezing plate of a filter press according to the present invention is shown in FIG. 1, and the squeezing plate comprises squeezed films 2 and 2 arranged on both surfaces of a substrate 1, and the squeezed film 2 and the substrate 1 are pressed. A pressure fluid chamber 3 is formed.

On the substrate 1, a stock solution hole 4 for supplying a stock solution to be filtered into a stock solution chamber (not shown) formed between the pressing plates by a filter cloth, and a compressed fluid is supplied to the pressurized fluid chamber 3. A compressed fluid passage 5, a filtrate discharge passage 6 for discharging the filtered filtrate, and a cleaning liquid passage 7 for supplying a cleaning liquid for cleaning the filter cloth and the like are provided.

The squeeze film 2 is made of a flexible airtight sheet, and rib-shaped projections 8, 8, ... Are provided on the surface thereof.
A liquid collection groove 9 for collecting the filtrate is formed between these projections 8, 8. A protective member 10 is integrally provided at a position corresponding to the filtrate discharge passage 6 of the squeeze membrane 2 as shown in FIGS. 2 to 4 to form a filtrate discharge portion.

That is, the filtrate discharge part is formed by detachably fitting the protective member 10 into the mounting recess 11 of the squeeze membrane 2, and the mounting recess 11 has the filtrate discharge hole 12 of the substrate 1. A hole portion 13 communicating with is opened.

The hole 13 is provided in the frame 2a of the squeeze membrane 2, and the mounting recess 11 is provided inside the frame 2a around the surface side of the hole 13, that is, the liquid collecting grooves 9, 9, …
It is provided facing the side. In other words, the portion of the mounting recess 11 is a thin-walled portion formed by recessing from the inside of the frame 2a to the inside of the frame 2a. The mounting recess 11 has a bottom surface 1 as shown in FIGS.
1a is formed into a flat surface and its inner peripheral surface 11b
Is an inclined surface that is inclined inward toward the surface of the frame 2a, whereby a dovetail groove having an inverted trapezoidal cross section when viewed from the inside of the frame 2a (as viewed in the direction of arrow A in FIG. 2). (See FIG. 3).

The protective member 10 is a small flat plate made of a hard material such as a metal plate such as an iron plate, an aluminum plate, a copper plate, or a hard synthetic resin plate, and as shown in FIGS. In addition to having a rectangular planar shape corresponding to the contour shape of, the thickness of the mounting recess 11 is substantially the same as the depth dimension thereof.

Of the outer peripheral surface of the protection member 10, the outer peripheral surfaces on three sides that fit into the inner peripheral surface 11b of the mounting recess 11, that is, the side outer peripheral surfaces 10a, 10a and the rear outer peripheral surface 10b are
Each of them is an inclined surface that is inclined outward toward the back surface 10d of the protection member 10, and the cross section of the protection member 10 is formed in a trapezoidal dovetail shape corresponding to the mounting recess 11 (FIG. 7).
Through FIG. 9).

The protective member 10 is provided with a filtrate hole which communicates with the hole portion 13 of the compressed film 2. The filtrate hole is formed by a filtrate inlet 14 provided in the front part of the protection member 10, a recess 15 provided on the back surface side, and a tunnel-shaped communication passage 16 that connects these.

As shown in FIG. 5, a plurality of (six in the illustrated example) the filtrate inlets 14 are provided in parallel on the front surface (front outer peripheral surface) 10c side of the protective member 10,
These are opened so as to face both the inside and the surface side of the frame 2a of the compressed film 2. That is, the filtrate inlet 14 is
As shown in FIG. 4, the cross section has a shape that is cut open from the inside of the frame 2a to the front side.

As shown in FIG. 6, the recesses 15 are provided in parallel on the rear surface (rear outer peripheral surface) 10b side of the protective member 10 and face the hole 13 of the squeeze membrane 2. When mounting the protective member 10, the hole 1
3 Further, the filtrate discharge holes 12 of the substrate 1 are overlapped and communicated with each other (see FIGS. 3 and 4).

The communication passage 16 is similar to the recess 15 in the above.
It is provided on the back surface 10d of the protection member 10, and the same number of them are juxtaposed corresponding to the filtrate inlets 14, 14, ... (See FIG. 6).

Next, the protective member 1 configured as described above.
0 is attached to the squeeze film 2 by the frame 2a
It suffices to insert the protective member 10 into the dovetail-shaped mounting recess 11 formed on the inside of the frame 2a. That is, when the protection member 10 is inserted, the protection member 1
The outer peripheral surfaces 10a, 10a, 10b of 0 and the inner peripheral surfaces 11b, 11b, 11b of the mounting recess 11 engage with each other (dovetail connection), and the surface 10e of the protective member 10 is flush with the surface of the frame 2a. And both are easily integrated. The engagement state in this case is preferably elastic engagement using the elastic force of the compressed film 2 itself.

The protective member 10 may be attached to the squeeze film 2 in advance, and the squeeze film 2 may be attached to the substrate 1 in advance, or the squeeze film 2 may be attached to the substrate 1.
The protective member 10 may be attached after attaching, and it does not matter before or after attaching the compressed film 2 to the substrate 1.

When the protective member 10 is mounted in the mounting recess 11, the mounting recess 1 of the protective member 10 is formed by the resilient dovetail joint between the mounting recess 11 and the protective member 10.
The positioning with respect to 1 is reliable and the deviation is unlikely to occur. Therefore, even if a high pressure is applied to the protection member 10, the protection member 10 does not start to move and is stably held.

Further, since the protective member 10 is made of a hard material as an integral body, it has sufficient strength, and the back surface 10d of the protective member 10 in the mounted state of the protective member 10.
Since the whole is contacted and supported by the bottom surface 11a of the mounting recess 11 in a close contact state, even if a high pressure is applied to the protective member 10, the protective member 10 will not bend.

Thus, in the filtrate discharge portion integrally provided with the protective member 10 as described above, the filtered liquid from the liquid collecting grooves 9, 9 ... on the pressed film surface (filtered surface) of the pressed film 2 is collected. The filtrate holes 14, 15, 16 of the protective member 10 and the squeeze film 1
It is guided to the inside of the filtrate discharge hole 12 of the substrate 1 through the hole 13 of 0, and is further discharged through the filtrate discharge passage 6 of the substrate 1.

In this case, since the filtrate introduction port 14 of the filtrate hole is opened so as to face both the inner side and the surface side of the frame 2a of the compressed film 2, the filtrate can be smoothly introduced from the filtration surface. ..

Further, since the recess 15 of the protection member 10 faces the hole 13 of the squeeze film 2, the hole 13 is seen from the surface side of the squeeze plate as shown in FIGS. 3 and 4. As shown, the surface 10e of the protection member 10 is covered. Therefore, when the filter press is driven, it is possible to effectively prevent the filter cloth overlaid on the upper side of the pressing plate from entering the hole portion 13.

The present invention is not limited to the above-mentioned embodiment and can be modified in various ways. For example, the protective member 1
The specific structure (shape, number of arrangements, etc.) of the filtrate holes 14, 15, 16 provided in No. 0 can be modified according to the purpose of use and the like.

[0030]

As described in detail above, according to the present invention, excellent effects as listed below can be obtained.

(1) A mounting recess is provided so as to face the inside of the frame around the front surface side of a hole provided in the frame of the compressed film, and the mounting recess has a dovetail-shaped cross section when viewed from the inside of the frame. The protective member, which has a shape and is fitted into the mounting recess, has a planar shape corresponding to the contour shape of the mounting recess, and a cross-sectional shape corresponding to the dovetail shape of the mounting recess. Since it is formed in the shape of an ant, it is easy to attach and detach the protective member to and from the squeeze membrane without the need for wires or other fasteners, and without the need for tightening.

That is, the inclined outer peripheral surface of the protective member is simply inserted into the dovetail-shaped mounting recess provided in the frame of the compressed film from the inside of the frame by inserting the corresponding dovetail-shaped protective member. And the slanted inner peripheral surface of the mounting recess are elastically engaged with each other to integrate them.

(2) Moreover, since the protective member is attached to the compressed film, the protective member can be attached efficiently before and after the compressed film is attached to the substrate.

(3) The protective member is a flat plate having a planar shape corresponding to the contour shape of the mounting recess and having a wall thickness approximately the same as the depth of the mounting recess. Since the protective member is elastically dovetail-joined, a mounting structure excellent in strength can be obtained.

That is, by this elastic dovetail joint,
Positioning of the protective member with respect to the mounting recess is assured, and deviation is unlikely to occur, so that the protective member is stably held. Therefore, even if a high pressure is applied to the protective member during use, the protective member does not start to move and come off from the compressed film.

Further, since the protective member is a flat plate-shaped integral member, it has sufficient strength, and when the protective member is mounted, the entire back surface of the protective member is in close contact with and supported by the bottom surface of the mounting recess. Therefore, even if a high pressure is applied to the protective member, the protective member does not bend.

(4) Since a recess communicating with the filtrate inlet is provided on the back side of the protective member so as to face the hole of the squeeze membrane, the hole should be covered by the surface of the protective member. Becomes Therefore, when driving the filter press,
It is possible to effectively prevent the filter cloth, which is overlaid on the upper side of the pressing plate, from entering the hole portion.

(5) Since the filtrate inlet of the protective member is opened to face both the inner side and the surface side of the frame of the compressed film, the filtrate can be smoothly introduced from the surface of the compressed film and the discharge efficiency of the filtrate can be improved. high. (6) Since it is not necessary to pass bolts and nuts through the compressed film to attach the protective member, it is possible to effectively prevent breakage and pain of the compressed film.

(7) Since the protective member has a thickness approximately the same as the depth dimension of the mounting recess, once the protective member is attached to the squeeze membrane, the protective member is completely integrated as a part of this squeeze membrane. Will turn into. Therefore, it is not necessary to reattach the protective member or correct the misalignment every time the pressing plate is opened or washed, and the handling is easy in this respect as well.

[Brief description of drawings]

FIG. 1 is a front view showing a squeezing plate of a filter press, which is an embodiment according to the present invention, with a part thereof cut away.

FIG. 2 is an enlarged front view showing a filtrate discharging part of the pressing plate.

3 is a cross-sectional view of the filtrate discharge part of the compression plate taken along line III-III in FIG.

FIG. 4 is a cross-sectional view of the filtrate discharge part of the compression plate taken along line IV-IV in FIG.

FIG. 5 is an enlarged plan view showing the same protective member.

FIG. 6 is an enlarged bottom view showing the protective member.

FIG. 7 is a front view of the protection member taken along line VII-VII in FIG.

8 is a cross-sectional view of the protection member taken along line VIII-VIII in FIG.

9 is a cross-sectional view of the protection member taken along line IX-IX in FIG.

FIG. 10 is a front view showing a filtrate discharge part in a pressing plate of a conventional filter press.

FIG. 11 is a view showing constituent members of the conventional filtrate discharge part,
(a) is a sectional view of the squeeze membrane, (b) is a plan view of the protective member, (c)
FIG. 4 is a sectional view of the protective member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 2 Compressed film 2a Frame of compressed film 6 Filtrate discharge passage 10 Protective member 10a Outer peripheral surface (side outer peripheral surface) of protective member 10b Outer peripheral surface (rear outer peripheral surface) of protective member 10d Back surface of protective member 11 Mounting recess 11a Mounting Bottom surface of the recessed portion 11b Inner peripheral surface of the mounting recessed portion 12 Filtrate discharge hole 13 Hole portion of squeezing membrane 14 Filtrate introduction port 15 Recessed portion 16 Communication passage

Claims (4)

[Claims] 1. A squeeze film is provided on both sides of a substrate, a hole communicating with a filtrate discharge hole of the substrate is provided in a frame of the squeeze film, and a protective member having a filtrate hole is attached to the hole. In the squeezing plate of the squeezing filter press, wherein the filtrate from the filtering surface of the squeezing membrane is introduced into the filtrate discharging hole through the filtrate hole, A mounting recess is provided around the front surface side so as to face the inside of the frame, the mounting recess has a dovetail-shaped cross-sectional shape when viewed from the inside of the frame, and the protection member has a depth of the mounting recess. The flat shape is formed to correspond to the contour shape of the mounting recess, and its cross-sectional shape is a dovetail shape corresponding to the dovetail shape of the mounting recess. A frame of the squeeze membrane formed at the front of the protective member. A filtrate introducing port opening facing the inside is provided, and a recess communicating with the filtrate introducing port is provided on the back surface side of the protective member so as to face the hole of the compressed film. Filter press squeeze plate. 2. The squeeze plate of the filter press according to claim 1, wherein the filtrate introducing port is opened so as to face both the inside and the front surface side of the frame of the squeeze film. 3. A squeezing plate of a squeezing filter press, which is disposed on both sides of a substrate, wherein a filtering surface surrounded by a frame is provided on the front side, and the substrate is provided on the frame. Is provided with a hole communicating with the filtrate discharge hole, and a protective member having a filtrate hole is attached to the hole, and the filtrate from the filtration surface is introduced into the filtrate discharge hole through the filtrate hole. In the compressed film configured as described above, a mounting recess is provided around the front surface side of the hole so as to face the inside of the frame, and the mounting recess has a dovetail-shaped cross section when viewed from the inside of the frame. The protective member has a shape and is made of a flat plate having a wall thickness that is substantially the same as the depth dimension of the mounting recess, and its planar shape is formed to correspond to the contour shape of the mounting recess and its cross section. The shape corresponds to the dovetail groove of the mounting recess. A filtrate introducing port that is formed and is open to face the inside of the frame is provided at the front part of the protective member, and a recess communicating with the filtrate introducing port faces the hole on the back surface side of the protective member. A squeeze film for a filter press, which is characterized by being provided with. 4. The squeeze film for a filter press according to claim 3, wherein the filtrate introduction port is opened so as to face both the inside and the surface side of the frame.