JPH075587U - Filter device for solvent purification - Google Patents

Abstract

(57) [Abstract] [Purpose] In a filter device in which a cartridge filter is housed in a case, when a filter is compressed due to fluctuation of a differential pressure at a solvent inlet / outlet, a gap between the filter and a fixed portion is prevented from being generated. [Constitution] By tightening the fixing bolt 7, the inner wall 2 of the case
The cartridge filter 5 is crimped and fixed between a and the pressing plate 6, and the elastic mechanism 14 which expands and contracts in the crimping direction of the filter is incorporated between the fixing bolt 7 and the pressing plate 6. When the filter 5 is compressed, the elastic mechanism 14 expands to maintain the crimped state and prevent the formation of a gap.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a filter device for purifying and circulating a solvent in a dry cleaning machine.

[0002]

[Prior art]

 In a dry cleaning machine, if impurities such as dirt, dust, and lint are mixed in the solvent, the cleaning ability will decrease and the impurities will adhere to clothing, so these impurities are always removed to purify the solvent. Normally, as shown in FIG. 4, a filter device 1 ′ is provided in a solvent circulation path 23 connecting the base tank 21 and the basket 22 so that the solvent is purified and circulated.

In a conventional filter device 1 ′, as shown in FIG. 5, a solvent take-out pipe 4 communicating with a solvent outlet 3 is provided on an inner wall 2 a of a cylindrical case 2 so as to surround the solvent take-out pipe 4. The cartridge filter 5 is housed so as to surround the.

In this cartridge filter 5, the holding plate 6 that is in contact with the filter packing 13 on the filter end face is tightened by the fixing bolt 7 attached to the solvent take-out pipe 4, and the holding plate 6 and the case inner wall 2a are crimped. The filter 5 can be exchanged through the opening 8 of the case 2 by attaching and detaching it to and from the fixed bolt 7.

A cover plate 9 is attached to the opening 8 of the case 2, and a solvent inlet 10 connected to a solvent introducing pipe 11 is provided on a peripheral wall near the opening 8.

In the above filter device 1 ′, the solvent introduced from the solvent inlet 10 is passed from the outside to the inside of the cartridge filter 5 to filter dirt and lint contained in the solvent and remove the impurities. Is taken in through a large number of holes 12 on the surface of the solvent take-out pipe 4 and discharged from the solvent outlet 3.

The filter packing indicated by 13 in the drawing is inserted between the filter 5 and between the filter 5 and between the case inner wall 2 a and the filter 5 in addition to between the end surface of the filter 5 and the pressing plate 6.

[0008]

[Problems to be solved by the device]

 In the filter device having the above structure, when the cartridge filter 5 is clogged with dirt or dust, the flow of the solvent is deteriorated and the differential pressure between the solvent inlet 10 and the solvent outlet 3 increases. Compressed axially.

However, in the conventional device, since the filter 5 is simply tightened and fixed between the holding plate 6 and the case inner wall 2a, when the filter 5 is compressed and deformed, the filter 5 and the holding plate 6 are deformed. In some cases, a gap is generated between the holding plate 6 and the fixing bolt 7, and dust such as thread waste passes through the filter 5 from the gap and is discharged from the solvent outlet 3.

Therefore, the present invention solves the above problems and provides a filter device that eliminates the passage of the solvent from the outside of the filter even when the cartridge filter is deformed and can perform stable solvent purification. It is an object.

[0011]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention incorporates an elastic mechanism that expands and contracts in the crimping direction of the filter in the fixed part of the cartridge filter, and determines the crimping amount of this elastic mechanism as the difference between the solvent outlet and the solvent inlet of the case. It was set to be larger than the amount that the filter is compressed by pressure.

[0012]

[Action]

 In the above structure, when the cartridge filter is compressed or expanded due to the fluctuation of the differential pressure at the solvent inlet / outlet, the elastic mechanism expands / contracts in accordance with the fluctuation to maintain the crimped state of the filter, and the gap in the filter fixing part is not generated. To prevent.

[0013]

【Example】

 1 and 2 show a filter device according to an embodiment. The basic structure and operation of this filter device 1 are the same as those of the conventional structure shown in FIG. 5, and the difference from the conventional structure is that several plates are placed between the fixing bolt 7 and the holding plate 6. This is because the elastic mechanism 14 including the spring 15 is incorporated.

The disc springs 15 are arranged side by side in the axial direction on the fixing bolt 7 and are attached so as to expand and contract in the axial direction of the cartridge filter 5, and are compressed in the axial direction by tightening the fixing bolt 7. The elastic force presses the cartridge filter 5 between the holding plate 6 and the case inner wall 2a.

The disc spring 15 is sufficiently tightened by the fixing bolt 7 before the filter 5 is started to be used, and the amount of pressure applied to the filter 5 depends on the pressure difference between the solvent inlet 10 and the solvent outlet 3 of the case 2. It is set to be larger than the amount by which 5 is compressed.

In the filter device 1 of the embodiment having the above structure, when the filter 5 and the filter packing 13 are axially compressed due to the fluctuation of the differential pressure between the solvent inlet 10 and the solvent outlet 3, the elastic mechanism 14 The disc spring 15 extends to push the pressing plate 6 in the axial direction, and the crimped state of the filter 5 is maintained. Therefore, no gap is generated between the filter 5 and the holding plate 6, and all the solvent can be filtered through the inside of the filter 5, so that stable purification can be performed.

FIG. 3 shows another embodiment. In this example, an activated carbon tank 16 for removing dyes in the solvent is connected to the solvent outlet side of the filter apparatus 1 of the embodiment shown in FIG. 1, and a strainer 17 is attached to the outlet of the activated carbon tank 16. It is provided.

By using the filter device 1 of the embodiment in the device having the activated carbon tank 16 as described above, the solvent can be introduced into the activated carbon tank 16 in a state where the internal dirt, dust and the like are completely removed. It is possible to prevent clogging of the strainer 17 at the outlet. Therefore, maintenance work can be eliminated over a long period of time and work efficiency can be improved.

The elastic mechanism 14 may be formed by combining another type of spring or an elastic material such as a rubber material in addition to the disc spring 15.

Although the elastic mechanism 14 is incorporated between the holding plate 6 and the fixing bolt 7 in the embodiment, the elastic mechanism may be incorporated on the case inner wall 2a side to which the filter 5 is crimped.

[0021]

【effect】

 As described above, according to the present invention, even if the cartridge filter is compressed by the fluctuation of the differential pressure between the solvent inlet and the outlet, the elastic mechanism maintains the crimped state and prevents the generation of the gap between the filter and the fixed portion. This has the effect of increasing the filtration efficiency of the filter and improving the washing efficiency of clothes.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a filter device according to an embodiment.

FIG. 2 is a cross-sectional view showing an enlarged main part of the above.

FIG. 3 is a sectional view showing another embodiment.

FIG. 4 is a schematic structural diagram of a dry cleaning machine.

FIG. 5 is a sectional view showing a conventional example.

[Explanation of symbols]

 1 Filter Device 2 Case 3 Solvent Outlet 4 Solvent Extraction Tube 5 Cartridge Filter 6 Holding Plate 7 Fixing Bolt 10 Solvent Inlet 14 Elastic Mechanism 15 Disc Spring 16 Activated Carbon Tank

Claims (1)

[Scope of utility model registration request] 1. A solvent purification method in which a replaceable cartridge filter surrounding a solvent outlet is fixed to an inner wall of a case, and a solvent introduced from a solvent inlet provided in the case is circulated to the solvent outlet through the inside of the cartridge filter. In the filter device for use in the cartridge filter, an elastic mechanism that expands and contracts in the crimping direction of the filter is incorporated in the fixing part, and the crimping amount of this elastic mechanism is the amount by which the filter is compressed by the differential pressure between the solvent outlet and the solvent inlet. A filter device for solvent purification, which is set to be larger than the above.