JP2554823B2 - Seal ring and squeeze membrane of filter press having the seal ring - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal ring which can be attached to a fluid passage hole of a squeeze membrane of a filter press, and a squeeze membrane of a filter press having the seal ring.

[0002]

2. Description of the Related Art Conventionally, various types of squeeze membranes of this type of filter press are known. For example, in the case where the front and back of the core plate are covered with a compression membrane to form a compression filter plate, in the filter fluid passage hole and the compression fluid supply hole of the core plate, a rubber annular member is fitted into the hole. And an outer circumferential portion is fixed to the outer surface of the annular member, and has an annular wall portion that rises from the outer circumferential portion, and closely adheres to the surface where the wall portions face each other when the filter plate is tightened. There is a structure that can be sealed by doing.

[0003]

However, in the above structure, the structure of the annular member is complicated and
There is a problem that it is necessary to perform processing for fixing the annular member to the core plate. Therefore, the object of the present invention is to
In solving the above problem, it has a simple structure,
Another object of the present invention is to provide a squeeze film seal ring for a squeeze film and a squeeze film of a filter press that can prevent fluid from leaking through a fluid passage hole without requiring special processing on the core plate.

[0004]

In order to achieve the above object, the present invention provides a fluid passage hole of a squeeze membrane with a seal ring that is in close contact with the squeeze membrane and is also in close contact with an opposing filter plate. Configure. That is, the squeeze film seal ring according to the present invention can be fitted into the fluid passage hole of the squeeze film of the filter press so as to be in close contact with the inner peripheral surface of the fluid passage hole, and can be fitted into the filter cloth hole of the filter cloth. And a thickness corresponding to the thickness of the filter cloth sandwiched between the adjacent filter plates when the filter plates are tightened and the pressed membrane. Further, in the above-mentioned configuration, it is possible to have a collar portion which can be closely fitted to a sealing recess formed in the inner peripheral surface of the fluid passage hole of the compressed film. Further, the squeeze film of the filter press according to the present invention is a squeeze film of a filter press having a fluid passage hole, which can be fitted into the fluid passage hole so as to be in close contact with the inner peripheral surface of the fluid passage hole, A seal ring having an outer peripheral surface that can be fitted into the filter cloth hole and having a thickness corresponding to the thickness of the filter cloth and the squeezing membrane sandwiched between adjacent filter plates when tightening the filter plate is configured. . Further, in the above configuration, the seal ring may be configured to have a flange portion that can be fitted tightly into a sealing recess formed in the inner peripheral surface of the fluid passage hole of the compressed film.

[0005]

According to the structure of the present invention, a seal ring is fitted in each fluid passage hole of the squeeze membrane, and the outer peripheral surface of the seal ring is brought into close contact with the inner peripheral surface of the fluid passage hole of the squeeze membrane to form a seal. Since both end faces of the ring are brought into close contact with the filter plates respectively, they can communicate with the through holes of the adjacent filter plates without fluid leakage. That is, in the compressed film using the seal ring, between the filter cloth and the outer peripheral surface of the seal ring, between one end face of the seal ring and one of the adjacent filter plates, and the other end face of the seal ring. The space between the squeeze filter plate and the core plate can be more effectively sealed. Therefore, the leakage of the filtrate between them can be effectively prevented. Therefore, it is only necessary to form through holes in the fluid passage holes of the squeeze membrane and the through holes of the core plate, and special processing for preventing fluid leakage in the core plate or the filter plate itself, for example, an annular member. There is no need to perform processing for fitting and fixing the. Further, since the seal ring can be fitted into the filter cloth hole of the filter cloth, the sealing property of the seal ring is not impaired by the cake attached to the filter cloth. Therefore, to prevent the cake from adhering to the filter cloth around the fluid passage hole and impairing the sealing performance, the conventional complicated work of closing the filter cloth near the fluid passage hole with an adhesive or the like is performed. Is unnecessary. Furthermore, the seal ring can be sealed with the compressed film simply by closely fitting in the fluid passage holes of the compressed film, and after the seal ring is attached, special sealing work is performed between the seal ring and the compressed film. There is no need.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments according to the present invention will be described below with reference to FIGS.
It will be described in detail based on. The squeezing membrane of the filter press having the seal ring according to the present embodiment is, as shown in FIG. 1, four fluid passage holes 2 of the squeezing membrane 2 of the filter press.
The seal rings 4, ..., 4 are closely fitted to the f, ...

The squeezing membrane 2 is, as shown in FIGS.
The core plate 3 is made of rubber or polypropylene and covers both the front and back surfaces of the core plate 3. The top and bottom ends of the core plate 3 are fixed to the core plate 3 by tightening and fixing means such as bolts. In addition,
The core plate 3 is suspended and supported by known means by the handles 3d and 3d. The squeeze membrane 2 has a filtration bed 2a having a large number of protrusions 2b, ..., 2b at the center of each of the front and back surfaces thereof, and a stock solution supply port 2c at the center thereof.
Further, in the vicinity of each corner of the compressed film 2, the fluid passage holes 2f, ...
It is formed by penetrating 2f. For this reason, each corner of the filter bed 2a is curved toward the undiluted solution supply port side, and each fluid passage hole 2f is formed.
I try not to communicate directly with. In this embodiment, of the four fluid passage holes 2f, ..., 2f, the upper right one in FIG. 1 is used as a compressed fluid supply port, and the other three are used as filtrate recovery ports. Therefore, the grooves 2d, ..., 2d are formed toward the fluid passage holes 2f, 2f, 2f along the curved portion of the filter bed portion 2a for the three fluid passage holes 2f, 2f, 2f, and The ends of the grooves 2d, ..., 2d communicate with the fluid passage hole 2f inside the core plate through an arcuate elongated hole 2e as described later.

The seal rings 4 having the same structure are fitted in the respective fluid passage holes 2f. This seal ring 4 is the squeeze film 2
The ring member is made of a material having a slightly higher hardness. The outer peripheral surface of the seal ring 4 is closely fitted to the inner peripheral surface of each fluid passage hole 2f of the compressed film 2. The outer peripheral surface of the seal ring 4 is usually a filter cloth hole 5 of a pair of filter cloths 5 and 5 between the filter board 7 and the pressing filter board 1.
It is also possible to fit in a and 5a. This seal ring 4
As is clear from FIG. 3, when the filter plates are fastened, when the normal filter plate 7 and the press filter plate 1 which are adjacent to each other are in pressure contact with each other, the thickness in the axial direction of The filter plate 7 is constructed so as to correspond to the total thickness of the thicknesses 5 and 5,
And the core plate 3 of the squeeze filter plate 1 are sandwiched between the fitting portion of the seal ring 4 and the other portions thereof while being substantially evenly adhered to each other. FIG. 3 shows that the upper fluid passage hole 2f is used as a compressed fluid supply port. Normally, a through hole 7a is simply formed on the filter plate 7 side to communicate with the compressed fluid supply port.
In addition to the through holes 3a, the core plate 3 on the side of the squeeze filter plate 1 further has a supply path 3b for communicating the through holes 3a with the back surface side of the squeeze film 2 so that the squeeze film 2 can be expanded by a squeezing fluid. And On the other hand, the lower fluid passage hole 2f in FIG. 3 is used as a filtrate recovery port. A through hole 7a is normally formed in the filter plate 7 to communicate with the filtrate recovery port, and a filtrate guide path 7b is provided to connect the through hole 7a and the opening of the bottom surface of the filter bed of the normal filter plate 7 to each other. The filtrate that has been formed and has passed through the filter cloth 5 from the filter chamber 6 is guided to the filtrate recovery hole 7a, while the core plate 3 side of the squeezing filter plate 1 has a through hole 3a formed therein for communication, and the elongated hole A guide path 3c for connecting the 2e and the through hole 3a is formed to guide the filtrate, which has entered the elongated hole 2e, into the through hole 3a. The through-hole 4a of the seal ring 4, the through-hole 7a of the normal filter plate 7 and the through-hole 3a of the core plate 3 of the squeezing filter plate 1 are configured to have substantially the same diameter so that the filtrate or the squeezing fluid can smoothly pass therethrough. To be able to In addition, in FIG. 3, 6 is a filter chamber formed between the filter cloths 5 and 5.

According to the above construction, in the filter press in which the normal filter plates 7 and the pressing filter plates 1 are alternately arranged, and the pair of filter cloths 5 and 5 is sandwiched between the adjacent filter plates 1 and 7,
At the time of tightening the filter plate, as shown in FIG. 3, between the normal filter plate 7 and the core plate 3 of the squeezing filter plate 1, both end surfaces of the seal ring 4 are in close contact with the opposite surfaces and are sealed. As the outer peripheral surface of the seal ring 4 comes into close contact with the inner peripheral surface of the fluid passage hole 2f of the compressed film 2, this portion is also sealed. Therefore, fluid leakage can be effectively prevented in these portions.

According to the above-mentioned embodiment, the seal ring 4 is fitted in each fluid passage hole 2f of the squeeze membrane 2, and the seal ring 4 and the inner peripheral surface of the fluid passage hole 2f of the squeeze membrane 2 of the filter press. A filter which has an outer peripheral surface which can be fitted in the fluid passage hole 2f so as to be in close contact and can be fitted in the filter cloth hole 5a of the filter cloth 5 and which is sandwiched between the adjacent filter plates 1 and 7 when the filter plate is fastened. By configuring the cloth 5 and the squeezing membrane 2 to have a thickness corresponding to that of the squeezing membrane 2, the through hole 7a of the normal filter plate 7 and the through hole 3a of the squeezing filter plate 1 which are adjacent to each other can communicate with each other without fluid leakage. You can That is, in the squeeze membrane 2 using the seal ring 4, in FIG. 4, a space A between the filter cloth 5 and the outer peripheral surface of the seal ring 4, and one annular end surface of the seal ring 4 and the end surface are opposed to each other. It is possible to more effectively seal the space B between the adjacent normal filter plate 7 and the space C between the other annular end face of the seal ring 4 and the core plate 3 of the squeezing filter plate 2 facing the end face. . Therefore, it is possible to effectively prevent the leakage of the filtrate as shown by the chain double-dashed line in FIG. Therefore, it is only necessary to form through holes in the fluid passage holes 2f of the squeeze membrane 2 and the through holes 3a of the core plate 3, and it is special to prevent the fluid from leaking to the core plate 3 or the filter plate itself. It becomes unnecessary to perform processing, for example, processing for fitting and fixing the annular member. Further, since the seal ring 4 can be fitted in the filter cloth hole 5a of the filter cloth 5, the cake attached to the filter cloth 5 does not impair the sealing property of the seal ring 4. Therefore, in order to prevent the occurrence of filtration in the vicinity of the fluid passage hole and the cake adhering to the filter cloth and impairing the sealing performance, the conventional complicated work of closing the filter cloth in the vicinity of the fluid passage hole with an adhesive or the like Is unnecessary. Further, the seal ring 4 serves as a fluid passage hole 2f for the compressed film 2.
The squeeze film 2 can be sealed simply by fitting the seal ring inside, and it is not necessary to perform a special sealing operation between the seal ring 4 and the squeeze film 2 after the seal ring is attached.

The present invention is not limited to the above embodiment, but can be implemented in various other modes. For example,
Instead of the seal ring 4, as shown in FIGS. 5 and 6, a circular ring portion 14b corresponding to the seal ring 4 and a flange portion 14c that radially protrudes on the core plate 3 side of the compression filter plate 1 are provided. Alternatively, the seal ring 14 may be integrally provided. In the squeeze film 2 using the seal ring 14, the filter cloth 5 and the circular ring portion 14 of the seal ring 14 in FIG.
b between the outer peripheral surface of b and the one annular end surface of the annular portion 14b of the seal ring 14 and the normal filter plate 7 that is adjacent to and adjacent to the end surface.
It is possible to more effectively seal between the space D and the ring-shaped end face D of the collar portion 14c of the seal ring 14 and the core plate 3 of the squeeze filter plate 1 respectively. In particular, as compared with the seal ring 4 of FIGS. 1, 2, and 3, the end face on the side of the core plate 3 is increased by having the collar portion 14c, and the sealing performance can be further improved.

Further, even if the fluid passage holes 2f of the squeeze membrane 2 are formed in the ears corresponding to the ears of the filter plate protruding laterally from the rectangular filter plate, the seal rings 4, 1
4 can be used. Also, the seal rings 4, 1
The filter 4 and the pressing membrane 2 are not limited to the filter press in which the filter plates 7 and the pressing filter plates 1 are alternately arranged, but are also applied to other types of filter presses, for example, those in which only the pressing filter plates are arranged. can do.

[Brief description of drawings]

FIG. 1 is a front view of a squeeze membrane of a filter press having a seal ring according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged cross-sectional view of a pressure seal ring portion at the time of tightening a filter plate of a filter press having the above-mentioned compressed film.

FIG. 4 is an enlarged cross-sectional view showing the relationship between the seal ring, the compressed film, and the filter plate.

FIG. 5 is an enlarged sectional view of a seal ring according to another embodiment of the present invention.

FIG. 6 is a front view of the seal ring of FIG.

7 is an enlarged cross-sectional view showing the relationship between the seal ring, the squeeze film and the filter plate of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Squeeze filter plate, 2 ... Squeeze film, 2a ... Filtration floor part, 2b ... Convex part, 2c ... Stock solution supply port, 2d ... Groove, 2e ... Elongated hole, 2f ...
Fluid passage hole, 3 ... Core plate, 3a ... Through hole, 3b ... Supply path,
3c ... Guide path, 4 ... Seal ring, 4a ... Fluid passage hole, 5 ...
Filter cloth, 5a ... Filter cloth hole, 6 ... Filter chamber, 7 ... Normal filter plate, 7a ...
Through hole, 7b ... filtrate guide channel, 14 ... seal ring, 14a ...
Fluid passage hole, 14b ... Cylindrical part, 14c ... Collar part.

Claims (4)

(57) [Claims] 1. A fluid passage hole (2) capable of closely contacting with an inner peripheral surface of a fluid passage hole (2f) of a squeeze membrane (2) of a filter press.
f) having an outer peripheral surface that can be fitted to the filter cloth (5) of the filter cloth (5) and is sandwiched between the adjacent filter plates (1, 7) when tightening the filter plates. A seal ring for a squeeze film, having a thickness corresponding to the thickness of the cloth (5) and the squeeze film (2). 2. The fluid passage hole (2) of the squeeze membrane (2).
The seal ring for a squeeze film according to claim 1, further comprising a collar portion (14c) which can be closely fitted in a sealing recess (2g) formed on the inner peripheral surface of f). 3. A squeeze membrane of a filter press having a fluid passage hole (2f), which can be fitted into the fluid passage hole (2f) so as to be in close contact with the inner peripheral surface of the fluid passage hole (2f) and has a filter cloth. Filter cloth hole (5)
The thickness corresponding to the thickness of the filter cloth (5) and the squeezing membrane (2) which has an outer peripheral surface that can be fitted to a) and is sandwiched between the adjacent filter plates (1, 7) when tightening the filter plate. A squeeze membrane of a filter press, characterized in that it is provided with a seal ring (4, 14) having a. 4. The seal ring (14) is a flange (2g) which can be closely fitted to a sealing recess (2g) formed in the inner peripheral surface of the fluid passage hole (2f) of the compressed film (2). 14c)
The squeeze film of the filter press according to claim 4, which comprises: