JPH08290013A - Packing for fluid passage hole in filter press - Google Patents

Abstract

PURPOSE: To secure sealing not only between adjacent filter plates but also between a press membrane and a core plate by installing a base part with a size to be inserted airtightly into a recession formed on the periphery of the through hole of the frame of a core plate and an insertion step part which protrudes on the outside of the base part and is inserted into the through hole of the frame of the press membrane. CONSTITUTION: A base part 33 with a size to be inserted airtightly into a recession 34, the diameter of which is larger than those of through holes 6, 9, which is formed on the periphery of the through holes 6, 9 which penetrate the frame 4 of a core plate is installed as a packing for fluid passage hole of a press plate 1. Additionally, an insertion step part 35 which protrudes on the outside of the base part 33 and is inserted into a through hole 36 penetrating the frame 4 of a press membrane 3 in the thickness direction is installed opposite the membrane 3. The press plates 1 with the use of the packing are arranged and clamped by a filter plate clamping device so that the airtightness between the step part 35 and the membrane 3 or the core plate is improved, eliminating a trouble in which pressing fluid supplied between the core plate and the membrane 3 leaks from the clearance between the step part 35 and the membrane 3 or the core plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid passage hole packing in a filter press constructed by covering a core plate with a squeeze film and fixing the squeeze film.

[0002]

2. Description of the Related Art Conventionally, as a packing to be fitted into a fluid passage hole of a pressing plate in a filter press constructed by covering a core plate with a pressing film, one side is fitted into an opening of a through hole formed in the core plate, and the other is fitted. On the outer surface that hits the adjacent filter plate on the side,
It is known that a fin-shaped outer peripheral wall is formed so as to obliquely project from the outer surface toward the center side in the radial direction.

[0003]

However, in the above-mentioned packing for the fluid passage hole, although the seal between the packing portion side fitted to the filter plate and the filter plate adjacent thereto can be obtained, the packing is provided through the packing. The seal between the squeeze membrane and the core plate cannot be obtained. The present invention seeks to secure a seal between a squeeze membrane and a core plate of a filter plate in which the packing is fitted, as well as a seal between the filter plate and a filter plate adjacent thereto by using one packing.

[0004]

In order to solve the above problems, the fluid passage hole packing according to the present invention comprises a core plate 2 and a squeeze film 3.
The packing 7, 10 is fitted into the through holes 6, 9 penetrating in the thickness direction of the frame 4 of the squeezing plate 1 formed by covering the squeezing plate 1, and the outer peripheral edge of the packing 7, 10 is brought into contact with the adjacent filter plate, and In the packing for fluid passage holes in the filter press for supplying / discharging the compressed fluid between the compression membrane 3 and the core plate 2 from the outside through the passages opening from the holes 6 and 9 to the filtration floor surface 12 of the core plate 2, Through holes 6, 9 penetrating the frame 4
A base portion 33 having a dimension to be fitted in a recess 34 having a diameter larger than the diameter of the through holes 6 and 9 formed in the peripheral edge of the base portion 33, and a frame 4 of the compressed film 3 protruding in the thickness direction so as to protrude outside the base portion 33. And a step portion 35 for fitting the compressed film 3 which is fitted into the through hole 36 penetrating therethrough. Further, in the present invention, in the above invention, the sealing peripheral groove 3 is engraved on the outer periphery 37 of the base portion 33 having a size to fit in the recess 34 of the core plate 2.
8 is provided.

[0005]

According to the present invention constructed as described above, the diameter of the through holes 6 and 9 formed at the periphery of the through holes 6 and 9 penetrating the frame 4 of the core plate 2 as the packing for the fluid passage hole of the compression plate. A base portion 33 having a size to be fitted in a recess 34 having a larger diameter in an airtight manner, and a step of fitting to the compression membrane 3 protruding outside the base portion 33 and fitted into a through hole 36 penetrating the frame 4 of the compression membrane 3 in the thickness direction. Since the squeeze plate 1 using the packing of the present invention is arranged and tightened by the filter plate tightening device, the stepped portion 35 for inserting into the squeeze film 3 and the squeeze film 3 or the core plate 2 are provided. The airtightness between them is enhanced, and the compressed fluid supplied between the core plate 2 and the compressed film 3 is inserted into the compressed film 3 with the stepped portion 35 and the compressed film 3 or the core plate 2.
There is no danger of leaking from between.

[0006] Moreover, the stepped portion 3 to be fitted into the compressed film 3
Since 5 is simply fitted into the through hole 36 of the compressed film 3 and attached, the attaching operation is simplified and the above-mentioned airtightness can be easily obtained. In addition, the fitting step portion 35 for the compressed film 3
Has a structure which is simply fitted into the through-holes 6 and 9 of the squeeze film 3, and does not require any additional hole processing for attachment, so there is no risk of damaging the packing during use and shortening the use period. Further, since the fitting step portion 35 with respect to the compressed film 3 is elastically fitted into the through holes 6 and 9 of the compressed film 3, the diameter of the fitted step portion 35 with respect to the compressed film 3 and the through hole 3 of the compressed film 3 are formed.
Even if there is a slight difference in the diameter of 6, the filter plate can be tightened to sufficiently seal the compressed film 3 and the core plate 2 through the packings 7 and 10.

Further, since the packings 7, 10 of the present invention have the sealing peripheral groove 38 formed in the outer periphery 37 of the base 33 fitted in the recess 34 of the core plate 2, the packings 7, 10.
The squeezing fluid enters the recess 34 of the core plate 2 from the joint between the through holes 6 and 9 of the core plate 10 and the through holes 6 and 9 of the core plate 2 to form the recess 34.
It is possible to prevent the seal inside from being broken. In addition, the compressed fluid supplied between the core plate 2 and the compressed film 3 through the through holes 6 and 9 goes around the fitting step portion 35 for the compressed film 3 and enters the recess 34 of the core plate 2 to form a recess. It is possible to prevent the seal inside 34 from being broken.

[0008]

The present invention will be described with reference to the drawings. 1 is a front view of a squeezing plate 1 according to an embodiment of the present invention, FIG. 2 is a central vertical sectional view taken along the line AA of FIG. 1, and FIG. 3 is a side view of FIG. As shown in FIG. 2, the pressing plate 1 of FIG. 1 is configured by covering the core plate 2 with the pressing film 3. A packing 7 is fitted in a through hole 6 that penetrates the lower right corner portion 5 of the frame 4 of the compression plate 1.
A packing 10 is fitted in a through hole 9 that penetrates the upper left corner of the same frame 4. The diameter of the packing 10 is smaller than that of the packing 7. Further, a small opening 13 is opened near the through hole 6 on the inclined surface 11 that is inclined from the inside of the frame 4 of the core plate 2 toward the filtration bed 12. The small opening 13 and the through hole 6 communicate with each other through a passage 14 passing through the inside of the core plate 2. Further, the through hole 9 on the inclined surface 11 of the core plate 2
A small opening 15 is open nearby. The small opening 15 and the through hole 9 communicate with each other through a passage 16 passing through the inside of the core plate 2.

Filtrate discharge holes 19 and 20 penetrate through the upper right corner 17 and the lower left corner 18 of the frame 4 of the compression plate 1. A small opening 21 is opened in the middle of the surface of the upper right corner portion 17 near the through hole 19. The small opening 21 and the through hole 19 communicate with each other through a passage 22 that passes through the inside of the core plate 2. Further, the small opening 21 communicates with the filter bed 12 by an opening groove 23 provided on the inclined surface 11 side from the upper right corner portion 17 surface. Similarly, a small opening 24 is formed in the middle of the surface of the lower left corner 18 of the frame 4 near the through hole 20. The small opening 24 and the through hole 20 communicate with each other through a passage 25 passing through the inside of the core plate 2. Further, the small opening 24 communicates with the filter bed 12 by an open groove 26 provided on the inclined surface 11 side from the lower left corner portion 18 surface.

On the other hand, on the one side of the core plate 2 having a projecting peripheral piece 27 on the back surface of the pressing plate 1 on the inner side of the frame 4 inside, a groove 28 for receiving the projecting peripheral piece 27 is provided on the inner side of the frame 4 of the core plate 2. Attached to. Further, a large number of known projections for leading out the filtrate are arranged on the surface of the filtration bed 12. Further, a stock solution hole 29 is opened through the centers of the core plate 2 and the compressed film 3, and the stock solution hole of the core plate 2 and the stock solution hole of the compressed film 3 are tightened with a bolt 3 using a tightening ring 30.
I have stopped one. Further, a filter plate handle 32 is attached so as to protrude from the side surface of the compression plate 1. The pressing plate 1 is moved for opening or closing by placing the filter plate handle 32 on a side plate (not shown).

The packing 7 will be described with reference to FIGS. 4 and 5. FIG. 4 shows the lower part B of the pressing plate 1.
FIG. 5 is an enlarged sectional view taken along line B, and FIG. 5 is a sectional view showing the packing 7 in a further enlarged manner. The packing 7 is
The base portion 33 is airtightly fitted and attached to a recess 34 having a diameter larger than the diameter of the through hole 6 formed in the peripheral edge of the through hole 6 penetrating the frame 4 of the core plate 2. Further, by inserting the fitting stepped portion 35 of the packing 7 formed so as to project to the outside of the base 33 into the compression membrane 3 into the through hole 36 that penetrates the frame 4 of the compression membrane 1 in the thickness direction, the packing 7
The compressed film 3 is brought into close contact with the core plate 2 via the. In addition, in the outer periphery 37 of the base 33 of the packing 7, the peripheral groove 3 for sealing is provided.
8 is provided, and an endless packing 39 is provided in the circumferential groove 38.
Inset. In addition, in FIG. 1, reference numeral 42 indicates a fastener for fixing the four corners of the compressed film 3 to the four corners of the core plate 2. Further, in FIG. 5, reference numeral 43 is provided on the outer surface of the step portion 35.
The fin-shaped outer peripheral wall that obliquely protrudes from the outer surface toward the center side in the radial direction is shown.

The squeezing plates 1 having the packing for fluid passage holes constructed as described above are arranged alternately with the ordinary filter plates having no squeezing membrane 3, and a pair of filter cloths 41 are hung between the filter plates to tighten them. Tighten with the attached device. From the outside of the machine, a stock solution is supplied between the filter plates through the stock solution holes 29 of the filter plates, and a pressing fluid is supplied to the pressing plate as described below to carry out filtration pressing dehydration to separate a filtrate and a solid content, and then a solid Minutes are discharged to the outside of the machine after opening the plate.

The squeezing fluid supplied in the above dehydration operation is passed from the through hole 6 for the fluid passage hole in the lower right corner 5 of the squeezing plate 1 through the passage 14 and the small opening 13 to the space between the core plate 2 and the squeezing membrane 3. Into the squeezing fluid chamber 40 formed in. At this time, the through hole 9 in the upper left corner 8 of the compression plate 1 is closed. The compressed fluid supplied causes the compressed membrane 3 to expand away from the filtration bed of the core plate 2, and the expanded compressed membrane 3 compresses and dehydrates the stock solution between the filter plates. At this time, the compressed fluid is sealed between the frame of the core plate 2 and the frame of the compressed film 3, and is sealed between the core plate 2 and the compressed film 3 via the packings 7 and 10 at the packings 7 and 10, There is no danger of leaking out of the machine. Further, the step of supplying the pressurized fluid from the through hole 9 can be omitted. The compressed fluid may be supplied from either the through holes 6 or 9.

After squeezing and dewatering, in order to discharge the squeezed fluid from the squeezed fluid chamber 40 to the outside of the machine, the pressurized fluid is supplied to the through hole 9 in the upper left corner 8 of the squeezed plate 1. The pressurized fluid enters the compressed fluid chamber 40 from the through hole 9 through the passage 16 of the core plate 2 and the small opening 15. The pressurized fluid having entered the compressed fluid chamber 40 discharges the compressed fluid in the compressed fluid chamber 40 from the through hole 6 to the outside of the machine through the small opening 13 of the core plate 2 and the passage 14.

Packing 10 fitted in the through hole 9
Has the same structure as the packing 7 described in FIGS. 4 and 5, and is similarly fitted and attached to the core plate 2 and the compression membrane 3. The pressurized fluid supplied to the through hole 9 is a frame 4 of the core plate 2 and a frame 4 of the compressed film 3 when the compressed fluid is discharged to the outside of the machine.
It is sealed between them and there is no danger of leaking out of the machine.

Since the packings 7 and 10 are simply fitted into the core plate 2 or the compression plate 3 and mounted, the mounting operation is simplified and the airtightness is easily obtained. In addition, since it is not necessary to apply a reinforcing member or the like from the outside to the packings 7 and 10 to reinforce them, or to make holes for mounting or the like, there is a possibility that the packings may be damaged during use and the usage period may be shortened. Absent. Further, since the fitting step portion 35 with respect to the compressed film 3 is elastically fitted into the through hole 36 of the compressed film 3, even if there is some difference between the step portion 35 and the through hole 36 of the compressed film 3, the filter plate By tightening, the seal between the squeeze membrane 3 and the core plate 2 can be sufficiently performed via the packings 7 and 10.

Since the sealing peripheral groove 38 is formed in the outer periphery 37 of the packing base 33, the packings 7, 10 are formed.
There is no possibility that the compressed fluid will enter the recess 34 of the core plate 2 from the joint between the through holes 6 and 9 of the core plate 2 and the through holes 6 and 9 of the core plate 2 to break the seal in the recess 34. In addition, the compressed fluid supplied from the through holes 6 and 9 between the core plate 2 and the compressed film 3 rotates around the stepped portion 35 into the compressed film 3 and enters the concave portion 34 to seal the concave portion 34. It can be prevented from being broken.

Further, the squeezing plates 1 of the filter press provided with the packings 7 and 10 of the present invention are not only arranged alternately with the ordinary filter plates which do not have the squeezing membranes 3, but also the squeezing plates having the squeezing membranes 3. 1 may be arranged side by side or arranged alternately with the filter frame. Further, the shape of the filter plate is not limited to the rectangular shape shown in the figure, but may be circular or any other shape. Further, the position of the through hole is not limited to the corner portion, and may be at another place of the frame.

[Brief description of drawings]

FIG. 1 is a front view of a squeezing filter plate of a filter press into which a fluid passage hole packing according to the present invention is fitted.

FIG. 2 is a vertical cross-sectional view taken along the line AA of FIG.

3 is a side view of the press filter plate of FIG. 1. FIG.

FIG. 4 is an enlarged sectional view taken along line BB of FIG. 1;

FIG. 5 is a sectional view showing a packing portion in FIG. 4 in a further enlarged manner.

[Explanation of symbols]

1 ... ・ Pressed plate, 2 ... Core plate, 3 ... Compressed film, 4 ... Frame, 5 ... Lower right corner, 6 ... Through hole, 7 ... ... Packing, 8 ... Upper left corner, 9 ... Through hole, 10 ... Packing, 11 ... Sloping surface, 12 ... Filtration bed, 13 ... Small opening, 14 ..., passage, 15 ... Small opening, 16 ..., passage,
17 ...- upper right corner, 18 ... lower left corner, 19 ... filtrate discharge hole, 20 ... filtrate discharge hole, 21 ... small opening, 22 ...
Passage, 23 ... Open groove, 24 ... small opening, 25 ... passage, 26 ... small opening groove, 27 ... projecting peripheral piece, 28 ... groove, Two
9 ...- stock solution hole, 30 ... tightening ring, 31 ... bolt nut, 32 ... filter plate handle, 33 ... packing base,
34 ... ・ Recess of core plate, 35 ...
Through hole of the compression plate, 37 ... Outer circumference, 38 ... Circumferential groove, 39 ...
··· Endless packing, 40 ··· Squeezing fluid chamber, 41 ··· Filter cloth, 42 ··· Stopper, 43 · · · Fin-shaped outer peripheral wall.

Claims (2)

[Claims] 1. Packings 7, 10 are fitted into through holes 6, 9 penetrating a frame 4 of a compression plate 1 formed by covering a core plate 2 with a compression film 3 in the thickness direction, and outside of the packings 7, 10. A filter press in which the week edge is brought into contact with an adjacent filter plate, and the compressed fluid is supplied and discharged from the outside between the compressed film 3 and the core plate 2 through the passages opened from the through holes 6 and 9 to the surface of the filter bed 12 of the core plate 2. In the packing for the fluid passage hole in, the base portion having a dimension to be fitted in a recess 34 having a diameter larger than the diameter of the through holes 6 and 9 penetrating the frame 4 of the core plate 2 in the periphery of the through holes 6 and 9 33, and a step 3 for fitting into the compressed film 3 protruding outside the base 33 and fitted into a through hole 36 penetrating the frame 4 of the compressed film 3 in the thickness direction.
5. A packing for a fluid passage hole in a filter press, comprising: 2. The packing for fluid passage holes in the filter press according to claim 1, further comprising: a sealing peripheral groove 38 formed on an outer periphery 37 of a base portion 33 having a dimension to be fitted in the concave portion 34. Packing for fluid passage hole in filter press.