JP2001030334A - Leaf disk filter tightening device - Google Patents

Abstract

(57) Abstract: A leaf disk filter fastening device according to the present invention aims to prevent leakage after decompression by applying a load to a center pole when compressing a leaf disk filter. . SOLUTION: The leaf disk filter tightening device according to the present invention includes a rod (50) provided in a center pole (4).
By holding the center pole (4) suspended in the air,
By compressing the center pole (4) by applying a load by the compression means (2), leakage from each leaf disk filter (8) after decompression is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leaf disk filter fastening device, and more particularly, to compressing each leaf disk filter located on the outer periphery of a center pole.
The center pole is suspended and compressed by a rod provided in the center pole, so that the center pole is compressed under a load and the sealing ability between leaf disk filters after compression is released is prevented from lowering. Related to new improvements.

[0002]

2. Description of the Related Art As a conventional leaf disk filter tightening device of this type, a structure shown in FIG. 6 can be mentioned. That is, what is indicated by reference numeral 1 in FIG. 6 is a frame having a compression means 2 such as a jack at its upper part, and a center pole 4 having a cylindrical shape as a whole on the bottom 3 of the frame 1. Is provided.
A flange 5 formed below the center pole 4 is located on the bottom 3, and a number of flow holes 6 are formed in a direction orthogonal to the height direction of the center pole 4. Communicates with an inner hole 7 formed at the center thereof.

On the outer periphery of the center pole 4, a large number of leaf disk filters 8 having a ring shape and a flat shape are laminated via a seal 9 made of an O-ring or the like. Each is corresponded to communicate. Among the leaf disk filters 8, a center bolt 10 is placed on a leaf disk filter 8 located at the uppermost stage via a compression flange 10a.
The center bolt 10 is screwed into a screw hole 11 above the center pole 4. This compression flange 10a
Is in contact with a cup-shaped compression jig 12 connected to the compression means 2.

Next, the operation will be described. First, as shown in the state of FIG. 6 described above, a number of leaf disk filters 8 are stacked on the outer periphery of the center pole 4, and each leaf disk filter 8 is compressed by the compression means 2 and the compression jig 12, so that the center bolt 10 is removed. After being screwed into the screw hole 11 on the upper part of the center pole 4 and fastened, the compression by the compression means 2 is released, and the compressed leaf disk filter device 20 shown in FIG. 2 can be obtained.

[0005]

Since the conventional leaf disk filter tightening device is configured as described above, there are the following problems. That is, when each leaf disk filter is compressed by the compression means in the state of FIG. 6, a load is applied to each leaf disk filter and the seal, but since the leaf disk filter and the seal are in contact with the bottom of the frame of the lower flange of the center pole, the center When no compression is applied to the pawl itself and the compression is released after the end of compression, the leaf disk filters and the seals try to return from the compressed state to the original state, so that an axial reaction occurs. Due to this reaction, the center pole is slightly extended, and as a result, the adhesion between each leaf disk filter and the seal is reduced, and leakage occurs during the filtering operation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. In particular, when compressing each leaf disk filter located on the outer periphery of the center pole, the center pole is provided by a rod provided in the center pole. A leaf disk filter tightening device which compresses the suspension in a suspended state, thereby compressing the center pole with a load applied thereto, and preventing a reduction in sealing ability between the leaf disk filters after the compression is released. The purpose is to:

[0007]

According to the present invention, there is provided a leaf disk filter tightening device, wherein a ring-shaped leaf disk filter is laminated on the outer periphery of a cylindrical center pole having a large number of flow holes through a ring-shaped seal. By compressing the disk filter by a compression means provided on the frame, in the leaf disk filter tightening device in which each leaf disk filter is tightened by a center bolt provided on the upper portion of the center pole in a compressed state, The center pole is held in a suspended state by a rod provided in the center pole, and the compression is performed by applying a load to the center pole by the compression means. A V-shaped recess is formed on the upper inner surface of the center pole. A configuration which is adapted to engage the V-shaped convex portion.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a leaf disk filter tightening device according to the present invention will be described below with reference to the drawings. Note that the same or equivalent parts as those in the conventional example will be described using the same reference numerals. In FIG.
Is a frame having a compression means 2 such as a jack at its upper part, and a columnar bar 50 is erected on the bottom 3 of the frame 1. A V-shaped recess 51 having a V-shaped cross section is formed in the upper part of the rod 50.

At the outer peripheral position of the rod 50, a center pole 4 having an inner hole 7 is provided coaxially with the rod 50,
The cross section formed on the upper inner surface of the center pole 4 is V
Since the V-shaped convex portion 52 forming the mold is engaged with the V-shaped concave portion 51, the flange 5 of the center pole 4 is floated from the bottom 3 of the frame 1 and the center pole 4 is It is held suspended.

A large number of flow holes 6 are formed in a direction orthogonal to the height direction of the center pole 4, and each of the flow holes 6 communicates with an inner hole 7 formed at the center thereof. On the outer periphery of the center pole 4, a large number of leaf disk filters 8 each having a ring shape and a flat shape are laminated via a ring seal 9 made of an O-ring or the like.
Are respectively corresponded so that the flow path holes 6 communicate with each other.

[0011] Of the leaf disk filters 8,
A center bolt 10 is placed on the leaf disk filter 8 located at the uppermost stage via a compression flange 10 a, and the center bolt 10 is screwed into a screw hole 11 above the center pole 4. This compression flange 1
A cup-shaped compression jig 12 connected to the compression means 2 is in contact with the upper portion of Oa.

Next, the operation will be described. First, as shown in the state of FIG. 1 described above, a large number of leaf disk filters 8 are stacked on the outer periphery of the center pole 4, and each leaf disk filter 8 is compressed by the compression means 2 and the compression jig 12. As shown in FIG. 5, the compression distance D is compressed and the flange 5 and the bottom 3 are floating, so that the center pole 4 also receives the load at the same time and slightly extends downward. When the center bolt 10 is tightened in this state, each leaf disk filter 8 and the ring-shaped seal 9 are fastened to the center bolt 10 in a compressed state, and the compressed state is released to release the leaf disk filter 8 and the ring-shaped seal 9. However, since the center pole 4 has already been expanded and compressed at the time of compression, the center pole 4 does not expand again as in the prior art. Leakage from the annular seal 9 can be prevented.

After the compression by the compression means 2 is released as described above, the leaf disk filter device 20 is configured as shown in FIG. 2, and when this leaf disk filter device 20 is applied to the plastic film manufacturing device 100, , As shown in FIG. That is, the molten resin 102 extruded from the extruder 101 is
After the foreign matter and the like are removed through the leaf disk filter device 20 in 03, the film is extruded from the die 104 into a seal shape and stretched to form the film 105.

[0014]

Since the leaf disk filter tightening device according to the present invention is configured as described above, the following effects can be obtained. That is, since the leaf disc filter is compressed while applying a load while holding the center pole with a rod, the center pole does not extend after the compression is released, and the sealing between the leaf disc filters is completely performed to prevent leakage. be able to.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a leaf disk filter tightening device according to the present invention.

FIG. 2 is a perspective view showing a completed leaf disk filter device.

FIG. 3 is a configuration diagram showing a plastic film manufacturing apparatus.

FIG. 4 is a configuration diagram showing a main part of the actual product of FIG. 1;

FIG. 5 is an enlarged view of a main part of FIG.

FIG. 6 is a schematic configuration diagram showing a conventional leaf disk filter tightening device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 2 Compression means 4 Center pole 6 Channel hole 8 Leaf disk filter 9 Ring seal 10 Center bolt 50 Bar 51 V-shaped recess 52 V-shaped projection

Claims (2)

[Claims] An annular leaf disc filter (8) is provided on the outer periphery of a cylindrical center pole (4) having a large number of flow holes (6).
Are laminated via a ring-shaped seal (9), and the leaf disk filter (8) is compressed by compression means (2) provided on a frame (1), whereby each of the leaf disk filters is
(8) In a leaf disk filter tightening device adapted to be fastened by a center bolt (10) provided on the upper part of the center pole (4) in a compressed state, a rod provided in the center pole (4) A leaf disk filter characterized in that the center pole (4) is held in a suspended state by 50) and the compression is performed by applying a load to the center pole (4) by the compression means (2). Tightening device. 2. A V-shaped recess provided at the top of the rod (50).
The leaf disc filter tightening device according to claim 1, wherein a V-shaped projection (52) formed on an upper inner surface of the center pole (4) is engaged with the (51).