JP2000093758A - Fixing method for cartridge type module and tank type filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing method for a cartridge type module for fixing or removing easily the cartridge type module by the simple operation and also provide a tank type filter for which the method is applied. SOLUTION: In a cartridge type module fixing method, the lower end of a cartridge head 12 is brought into contact with a protrusion 6b of a through- hole 6a of a partition 6 and placed thereon, and then a fitting ring 16 in the state of being contracted in the diameter direction is inserted into the through- hole 6a, and the retainer ring 16 is expanded in the diameter direction and engaged with a retainer ring fitting channel 6d to engage the cartridge head 12 with the partition 6 and fixed thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fixing a cartridge-type module and a tank-type filtration device to which the same is applied. Also, the present invention relates to a method for fixing a cartridge type module provided in a tank type filtration device suitable for water treatment for purifying a large amount by an ultrafiltration device.

[0002]

2. Description of the Related Art An example of a conventional method of fixing a cartridge type module will be described with reference to FIGS. 9 (a) and 9 (b). In FIG. 9A, a through hole 51a through which the cartridge type module 52 is inserted is formed in a partition plate 51 that partitions an internal space of a filtration tank (not shown), and a bolt 51 is provided near the through hole 51a.
b is erected.

A ring-shaped packing is attached to the bolt 51b.
After the packing 53 is placed on the partition plate 51 by passing through the hole 53a of the cartridge 53, the hole 54b of the flange 54a formed at the upper end of the cartridge head 54 provided at the outer periphery of the upper end of the cartridge type module 52 is bolted. The flange 54a is placed on the packing 53 by passing through the 51b, and the nut 55 is screwed and fastened to the bolt 51b, so that the cartridge type module 52 is fixed to the partition plate 51.

In FIG. 9B, after a ring-shaped packing 53 is placed on the partition plate 51 around the through hole 51a formed in the partition plate 51, the cartridge head 54 is placed on the packing 53. A flange 54a formed on the upper end portion is placed, and a nut 55 is screwed and fastened to a bolt 51b erected on the partition plate 51, and the lower surface of the nut 55 is brought into contact with the upper surface of the flange 54a to form a cartridge type module. 52 is fixed to the partition plate 51.

[0005]

However, in the conventional example described above, in the structure shown in FIG. 9A, a hole 54b formed in the flange 54a of the cartridge head 54 is formed by a through hole.
Positioning when inserting into a plurality of bolts 51b arranged on the outer periphery of 51a is troublesome, and in the structure shown in FIG. 9 (b), a nut screwed into a plurality of bolts 51b arranged on the outer periphery of through hole 51a. Since it is necessary to uniformly contact the lower surface of the flange 55 with the upper surface of the flange 54a, the positioning of the flange 54a is troublesome. Further, in the structure shown in FIGS. 9A and 9B, the work of screwing and tightening the plurality of nuts 55 to the bolts 51b is also troublesome, and if the tightening of the nuts 55 is not uniform, the sealing performance is insufficient. There was a possibility that it might be.

[0006] The present invention is to solve the above-mentioned problems,
An object of the present invention is to provide a method of fixing a cartridge-type module in which the fixing and removal of the cartridge-type module can be easily performed with one touch, and a tank-type filtration device to which the method is applied.

[0007]

According to the present invention, there is provided a method for fixing a cartridge-type module, wherein the cartridge-type module comprising a plurality of hollow fiber membranes is suspended and fixed in a filtration tank. In the method of fixing the cartridge-type module, the cartridge-type module is inserted into a through-hole formed in a partition plate that partitions an internal space of the filtration tank, and a radially inner side of the through-hole provided in a part of the through-hole. A C-shaped expandable / contractible radial direction after suspending and supporting the cartridge type module by contacting the lower end of a cartridge head provided on the outer periphery of the upper end of the cartridge type module with the protruding projection. The retaining ring of the shape is inserted into the through hole in a contracted state, and the groove is formed on the wall surface of the through hole at the upper part of the cartridge head. To characterized in that for fixing lock the cartridge head of the retaining ring and dilates engaged with the cartridge-type modules to the partition plate.

According to the above method, when fixing the cartridge type module, the cartridge type module is inserted into the through hole formed in the partition plate, and the cartridge head is inserted into the projecting portion projecting radially inward of the through hole. After contacting and supporting the lower end, a C-shaped retaining ring is extended and engaged with the groove formed in the wall surface of the through hole to easily engage the cartridge head with the partition plate. The cartridge-type module can be fixed. When the cartridge-type module is removed, the retaining ring is contracted to remove the cartridge-type module from the groove formed on the wall surface of the through-hole, and then the cartridge-type module can be easily removed by pulling it out of the through-hole.

Further, the tank-type filtration device according to the present invention comprises:
In a tank type filtration device in which a cartridge type module in which a plurality of hollow fiber membranes are bundled is suspended and supported in a filtration tank, the cartridge type module is disposed at an upper end of the cartridge type module accommodated in the filtration tank, and A through-hole is formed at a predetermined position of a partition plate that partitions the internal space of the filtration tank, and a projection that projects radially inward of the through-hole is formed at a part of the through-hole, and the cartridge-type module is inserted through the through-hole. The cartridge type module is suspended and supported by being inserted into the hole and abutting the lower end of the cartridge head provided on the outer periphery of the upper end of the cartridge type module with the protruding portion, and expands / contracts in the radial direction to support the cartridge type module. At the top of the cartridge head, a C-shaped retaining ring is formed on the wall surface of the through-hole, which is detachable from a groove formed on the wall surface of the through-hole. Cartridge head of the cartridge type module engaged with the groove, characterized in that the fixed engaged to the partition plate.

According to the above construction, the lower end portion of the cartridge head is brought into contact with the projection projecting radially inward of the through hole formed in the partition plate to support the cartridge type module inserted through the through hole. A cartridge-shaped module is fixed with a simple structure by engaging a C-shaped retaining ring with a groove formed on a wall surface of the through hole and locking an upper end portion of the cartridge head by the retaining ring. And the upper end of the cartridge head is locked by the retaining ring, so that the cartridge type module can be prevented from rising due to pressure or the like during the filtration operation.

Further, when an elastic member is interposed between a retaining ring engaged with a groove formed in a wall surface of the through hole and an upper end surface of a cartridge head provided on an outer peripheral portion of an upper end of the cartridge type module. Thus, the cartridge type module can be securely fixed by pressing the cartridge head by the elastic force of the elastic member interposed between the retaining ring and the upper end surface of the cartridge head.

When the retaining ring and the elastic member are integrally formed, the number of parts can be reduced, the cost of parts can be reduced, and the labor for mounting and removing the cartridge type module can be further reduced. Can be reduced.

As the elastic member, a spring washer, a disc spring, a push nut, a wave washer, an O-ring, and a gasket can be used.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of a method for fixing a cartridge type module according to the present invention and a tank type filtering apparatus to which the same is applied will be specifically described. FIG. 1 is an explanatory cross-sectional view showing the configuration of a first embodiment of a tank type filtration device according to the present invention. FIG. 2 is a first embodiment in which a cartridge type module is supported by a partition plate and a C-shaped retaining ring is used. FIG. 3 is a perspective view showing a state in which the cartridge type module is attached to the partition plate in the first embodiment, and FIG. 4A is a plan view showing a C-shaped retaining ring. FIG. 4 (b) is a side view of a C-shaped retaining ring, and FIG. 4 (c) shows a state in which the C-shaped retaining ring is engaged with a groove formed in a wall surface of a through hole of a partition plate. FIG. 5 is an explanatory plan view showing a state in which a cartridge type module is supported by a partition plate and locked by a C-shaped retaining ring via an elastic member in a second embodiment of the tank type filtration device according to the present invention. FIG. 6 is an enlarged view of a main part shown in FIG. 7 (a) to 7 (d) are views showing configurations of various elastic members, and FIG. 8 is a third view of a tank type filtration device according to the present invention. It is a principal part enlarged view which shows the mode that the cartridge type module was supported by the partition plate and locked by the C-shaped retaining ring via the elastic member in the embodiment.

First, the configuration of a first embodiment of a tank-type filtration device according to the present invention will be described with reference to FIGS. In FIG. 1, reference numeral 1 denotes a tank-type filtration device for supplying and filtering an undiluted solution. Applicable to water treatment.

In a filtration tank 2 of the tank type filtration device 1, a cartridge type module 4 in which a plurality of hollow fiber membranes 3 are bundled is suspended and supported. It is divided into three chambers by a separation plate 5 and a partition plate 6 fixed to the filtration tank 2.

The filtration tank 2 is divided into a tank body 2a which is disposed at a lower portion and is erected by supporting means (not shown) and a lid 2b which is attached to an upper portion of the tank body 2a. The separation plate 5 and the partition plate 6 are fixed to the predetermined height position of the portion in a watertight and airtight manner by welding or the like, respectively.

Thus, the supply water chambers 7, 8 are formed by the space formed by the lower portion of the tank body 2a and the separation plate 5, and the space formed by the middle portion of the tank body 2a, the separation plate 5, and the partition plate 6. Is formed.

The lid 2b is water-tightly and air-tightly fixed to the upper part of the tank body 2a by a fixing means (not shown) via a packing 9, and the treatment water chamber 10 is formed by the space formed by the partition plate 6 and the lid 2b. Is formed.

On the other hand, the hollow fiber membrane 3 has an opening at the upper end and a closed lower end, and a large number of hollow fiber membranes 3 are bundled and the outer periphery of the upper end is bonded with an adhesive. The adhesive layer 11 is further inserted into a cylindrical cartridge head 12 and fixed to the cartridge head 12 by an adhesive.

At the lower end of the cartridge head 12, a cartridge tube 13 fitted to the outer periphery of the integrally bundled hollow fiber membranes 3 is fixed by welding. The length up to the lower end of the cartridge tube 13 connected to is set to be longer than the entire length of the hollow fiber membrane 3.

A large number of hollow fiber membranes 3 are bundled and their lower ends are integrally joined by an adhesive layer 14 adhered by an adhesive, and the adhesive layer 14 is fixed inside the cartridge tube 13. . The adhesive layer 14 has a through hole (not shown) for introducing raw water and gas or liquid for cleaning into the cartridge type module 4.

The air for air bubbling supplied from the water supply chamber 7 through the nozzle 5a provided on the separation plate 5 by the skirt portion 13a of the cartridge tube 13 extending further below the lower end of the hollow fiber membrane 3. Are efficiently guided to the hollow fiber membranes 3 of the cartridge type modules 4 through the through holes of the adhesive layer 14.

The cartridge type module 4 is disposed at the upper end of a cartridge type module 4 housed in the filter tank 2 while partitioning the internal space of the filter type tank 4.
Of the cartridge type module 4 and the load applied to the upper surface of the cartridge type module 4 and the upper surface of the partition plate 6 due to the weight of all the cartridge type modules 4 and the internal pressure (water pressure) applied inside the treatment water chamber 10. A plurality of through-holes 6a are formed at predetermined positions, each having a predetermined thickness having a sufficient strength, and through which the cartridge type module 4 is inserted.

A projecting portion 6b projecting radially inward of the through hole 6a is formed at a lower portion of the through hole 6a of the partition plate 6, and a cartridge provided on the outer peripheral portion of the upper end of the cartridge type module 4 at the projecting portion 6b. The lower end of the head 12 abuts to suspend and support the cartridge type module 4.

An O-ring is provided on the wall surface of the through hole 6a of the partition plate 6.
An O-ring fitting groove 6c into which 15 is fitted is provided,
When the outer wall surface of the cartridge head 12 is pressed against the O-ring 15 fitted in the O-ring fitting groove 6c, the cartridge head 12 is attached to the partition plate 6 in a watertight and airtight manner. A groove for fitting the O-ring 15 may be provided on the cartridge head 12 side.

At the position corresponding to the upper end surface of the cartridge head 12, a C-shaped retaining ring 16 which can be expanded / contracted in the radial direction is fitted and engaged with the wall surface of the through hole 6a of the partition plate 6. A retaining ring fitting groove 6d is formed.
Is inserted into the through hole 6a of the partition plate 6 in a contracted state, and the retaining ring 16 is extended and engaged with the retaining ring fitting groove 6d formed on the wall surface of the through hole 6a above the cartridge head 12. Thus, the cartridge head 12 of the cartridge type module 4 can be locked and fixed to the partition plate 6, whereby the cartridge type module 4
Are stably accommodated inside the filtration tank 2.

As the material of the C-shaped retaining ring 16 which can be expanded / contracted in the radial direction, for example, JIS G3311 S60CM to S7
Polished special steel strips such as 0CM and SK5M, JIS G3506 SWRH62 ~ SW
Hard steel wire such as RH82, steel material such as steel strip for spring, or SU
Stainless steel materials such as S304 and SUS316 are applicable.

As shown in FIGS. 3 and 4, a pair of holes 16a are formed on both sides of the opening end of the retaining ring 16.
When a jig (not shown) is inserted through a and a force is applied in a direction to bring the holes 16a closer to each other against the elastic force of the retaining ring 16, the retaining ring 16 can be contracted in the radial direction. When the force of the jig is relaxed, the retaining ring 16 expands in the radial direction due to the elastic force of the retaining ring 16.

When the cartridge type module 4 is fixed to the partition plate 6, as shown in FIG. 3, the cartridge type module 4 is inserted into a through hole 6a formed in the partition plate 6 and the through hole 6a is formed. After the lower end of the cartridge head 12 is supported by contacting the lower end of the cartridge head 12 with the radially inwardly protruding portion 6b, the stopper ring 16 is inserted into the through hole 6a in a contracted state, as shown in FIG. By expanding and engaging the retaining ring 16 with the retaining ring fitting groove 6d formed on the wall surface of the through hole 6a, the upper surface of the cartridge head 12 is regulated by the lower surface of the retaining ring 16.
Can be locked to the partition plate 6 and easily fixed.

When removing the cartridge type module 4 from the partition plate 6, the retaining ring 16 is contracted to
After being removed from the retaining ring fitting groove 6d formed on the wall surface a, the cartridge type module 4 can be easily removed by pulling it out of the through hole 6a.

In the above configuration, during the filtration operation by the tank type filtration device 1, the supply water inlet 2 provided at the lower portion of the tank main body 2a of the filtration tank 2 by a pump (not shown).
c, the raw water supplied to the supply water chamber 8 and further supplied to the supply water chamber 8 through the nozzle 5a provided on the separation plate 5 is filled in the supply water chamber 8 and the skirt portion 13a of the cartridge cylinder 13 Through the through hole (not shown) of the adhesive layer 14 to be guided into the cartridge tube 13.

The raw water in the vicinity of the outer peripheral portion of the hollow fiber membrane 3 inside the cartridge tube 13 is pressure-filtered from the outside of the hollow fiber membrane 3 to the inside, and the water is treated from the open upper end of the hollow fiber membrane 3 to the treated water chamber.
The filtrate is guided to 10 and the filtrate contained in the treated water chamber 10 is taken out of the filtration tank 2 from a treated water outlet 2d provided on the top of the lid 2b.

On the other hand, at the time of backwashing, filtrate is supplied from the treated water outlet 2 d and flows back to the supply water chamber 8 to remove suspended substances accumulated in the hollow fiber membranes 3 and from the nozzle 5 a of the separation plate 5. The water is discharged from the feed water inlet 2c to the outside of the filtration tank 2 through the feed water chamber 7.

According to the above construction, the lower end of the cartridge head 12 is brought into contact with the projection 6b projecting radially inward of the through hole 6a formed in the partition plate 6, thereby forming the through hole 6a.
To support the cartridge type module 4 inserted through
A C-shaped retaining ring 16 is engaged with a retaining ring fitting groove 6d formed on the wall surface of the through hole 6a to form a cartridge head.
The cartridge-type module 4 can be fixed in a simple structure by locking the upper end of the cartridge head 12 with the retaining ring 16, and the upper end of the cartridge head 12 is retained by the retaining ring 16, so It is possible to prevent the cartridge type module 4 from rising due to pressure or the like generated in the supply water chamber 8.

Further, the cartridge-type module 4 can be fixed only by fitting the retaining ring 16 into the retaining ring fitting groove 6d with one touch, and the cartridge head can be fixed as in the conventional example shown in FIG. A plurality of bolts 54 are formed on the outer periphery of the through hole 51a through holes 54b formed in the flange 54a.
The lower surface of the nut 55 to be screwed to the bolts 51b arranged on the outer periphery of the through hole 51a as in the conventional example shown in FIG.
Since it is necessary to uniformly contact the upper surface of the 54a, the troublesome work of positioning the flange 54a can be omitted, and the troublesome work of screwing and fastening a plurality of nuts 55 to the bolts 51b can be omitted. good.

Next, a tank type filtration device according to a second embodiment of the present invention will be described with reference to FIGS. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

In this embodiment, as shown in FIGS. 5 and 6, a retaining ring 16 engaged with a retaining ring fitting groove 6d formed in a wall surface of a through hole 6a formed in the partition plate 6 and a cartridge type module. A spring washer 17 serving as an elastic member is interposed between the cartridge head 12 and an upper end surface of the cartridge head 12 provided on the outer peripheral portion of the upper end of the cartridge 4.

In this embodiment, when the cartridge type module 4 is fixed to the partition plate 6, as shown in FIG. 6, the cartridge type module 4 is inserted into a through hole 6a formed in the partition plate 6, and After the lower end of the cartridge head 12 is supported by contacting the lower end of the cartridge head 12 with the protrusion 6 b projecting radially inward of the hole 6 a, the spring washer 17 is inserted into the through hole 6 a and placed on the upper surface of the cartridge head 12. ,
By inserting the retaining ring 16 in a contracted state into the through hole 6a and expanding and engaging the retaining ring 16 with the retaining ring fitting groove 6d formed on the wall surface of the through hole 6a, the cartridge head is formed.
Spring washer whose upper end surface is regulated by the lower surface of the retaining ring 16
The cartridge head 12 can be locked to the partition plate 6 via 17 so as to be easily fixed.

When the cartridge type module 4 is removed from the partition plate 6, the retaining ring 16 is contracted to
After the spring washer 17 is detached from the through hole 6a and the cartridge type module 4 is pulled out from the through hole 6a, the cartridge type module 4 can be easily removed.

According to the above configuration, the cartridge head 12 is pressed against the cartridge head 12 by the elastic force of the spring washer 17 which is an elastic member interposed between the retaining ring 16 and the upper end surface of the cartridge head 12, thereby securely fixing the cartridge type module 4. Can be fixed to

In this embodiment, the case where the spring washer 17 as shown in FIG. 7A is applied as an example of the elastic member has been described. However, as another example of the elastic member, FIG.
, A push nut 19 as shown in FIG. 7 (c), and a wave washer 20 as shown in FIG. 7 (d). Further, an O-ring, gasket, coil spring (not shown) may be used. It is also possible to apply such as an elastic member.

As described above, the spring washer 17 is used as the elastic member.
When the disc spring 18, the push nut 19, and the wave washer 20 are used, commercially available inexpensive parts can be used, and the cost of parts can be further reduced. Other configurations are the same as those of the first embodiment, and similar effects can be obtained.

Next, a third embodiment of the tank-type filtration device according to the present invention will be described with reference to FIG. The same components as those in the first and second embodiments are denoted by the same reference numerals, and description thereof is omitted.

In this embodiment, as shown in FIG. 8, a C-shaped retaining ring in which an elastic member such as a leaf spring or a coil spring is integrally formed below the retaining ring 16 of each of the above-described embodiments.
21 is applied. According to this, the number of parts can be reduced, the cost of parts can be reduced, and the labor for mounting and removing the cartridge type module 4 can be reduced. Other configurations are configured in the same manner as the above embodiments, and similar effects can be obtained.

[0046]

According to the cartridge type module fixing method of the present invention, when fixing the cartridge type module, the cartridge type module is inserted into the through hole formed in the partition plate and the radial direction of the through hole is fixed. After the lower end of the cartridge head abuts and is supported by the protrusion protruding inward, the groove formed on the wall surface of the through hole has C
The cartridge-shaped retaining ring can be expanded and engaged to lock the cartridge head to the partition plate for easy fixation.When removing the cartridge-type module, the retaining ring is contracted to remove the wall of the through hole. After the cartridge module is removed from the groove, the cartridge module can be easily removed by pulling it out of the through hole, so that the cartridge module can be easily fixed and removed with one touch.

Further, according to the tank type filtering device of the present invention, the lower end of the cartridge head is brought into contact with the projecting portion projecting radially inward of the through hole formed in the partition plate so as to be inserted into the through hole. A simple structure in which a C-shaped retaining ring is engaged with a groove formed in the wall surface of the through hole and the upper end of the cartridge head is locked by the retaining ring. Thus, the cartridge type module can be fixed, and since the upper end of the cartridge head is locked by the retaining ring, it is possible to prevent the cartridge type module from rising due to pressure or the like during the filtration operation.

Also, when an elastic member is interposed between the retaining ring engaged with the groove formed on the wall surface of the through hole and the upper end surface of the cartridge head provided on the outer peripheral portion of the upper end of the cartridge type module. Thus, the cartridge type module can be securely fixed by pressing the cartridge head by the elastic force of the elastic member interposed between the retaining ring and the upper end surface of the cartridge head.

When the retaining ring and the elastic member are integrally formed, the number of parts can be reduced, the cost of parts can be reduced, and the labor for mounting and removing the cartridge type module can be reduced. You can do it.

As the elastic member, a spring washer, a disc spring, a push nut, a wave washer, an O-ring, and a gasket can be used.

[Brief description of the drawings]

FIG. 1 is an explanatory cross-sectional view illustrating a configuration of a first embodiment of a tank-type filtration device according to the present invention.

FIG. 2 is an enlarged view of a main part showing a state in which a cartridge type module is supported by a partition plate and locked by a C-shaped retaining ring in the first embodiment.

FIG. 3 is a perspective view showing a state in which a cartridge type module is mounted on a partition plate in the first embodiment.

FIG. 4A is a plan view showing a C-shaped retaining ring,
(B) is a side view of a C-shaped retaining ring, and (c) is an explanatory plan view showing a state in which the C-shaped retaining ring is engaged with a groove formed in a wall surface of a through hole of a partition plate. is there.

FIG. 5 is an enlarged view of a main part showing a state in which a cartridge type module is supported by a partition plate and locked by a C-shaped retaining ring via an elastic member in a second embodiment of the tank type filtration device according to the present invention. FIG.

FIG. 6 is a perspective view showing a state in which a cartridge type module is mounted on a partition plate in the second embodiment.

FIGS. 7A to 7D are diagrams showing configurations of various elastic members.

FIG. 8 is an enlarged view showing a state in which the cartridge type module is supported by a partition plate and locked by a C-shaped retaining ring via an elastic member in the third embodiment of the tank type filtration device according to the present invention. FIG.

FIG. 9 is a diagram illustrating a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tank type filtration apparatus 2: Filtration tank 2a ... Tank main body 2b ... Lid 2c ... Supply water inlet 2d ... Treatment water outlet 3 ... Hollow fiber membrane 4 ... Cartridge type module 5 ... Separation plate 5a ... Nozzle 6 ... Partition plate 6a ... Through hole 6b ... Protrusion 6c ... O-ring fitting groove 6d ... Retaining ring fitting groove 7,8 ... Supply water chamber 9 ... Packing 10 ... Treatment water chamber 11 ... Adhesive layer 12 ... Cartridge head 13 ... Cartridge cylinder 13a ... Skirt 14 Adhesive layer 15 O-ring 16 Retaining ring 16 a Hole 17 Spring washer 18 Disc spring 19 Push nut 20 Wave washer 21 Retaining ring

Continued on the front page F term (reference) 4D006 GA06 GA07 HA03 HA19 HA95 JA12A JA12C JA13A JA13C JA23A JA23C JA25A JA31A JB11 KC02 KC03 KC13 KC14 MA01 PB03 PB04 PB05 PB08

Claims (5)

[Claims] 1. A method of fixing a cartridge type module in which a plurality of hollow fiber membranes are bundled and suspended in a filtration tank, wherein the through hole is formed in a partition plate for partitioning an internal space of the filtration tank. The lower end of the cartridge head provided on the outer peripheral portion of the upper end of the cartridge type module is inserted into the projecting portion provided in a part of the through hole and projecting radially inward of the through hole. After abutting and supporting the cartridge type module,
A C-shaped retaining ring that can be expanded / contracted in the radial direction is inserted into the through hole in a contracted state, and the retaining ring is inserted into a groove formed on a wall surface of the through hole above the cartridge head. A method for fixing a cartridge-type module, wherein the cartridge-type module is extended and engaged to lock and fix a cartridge head of the cartridge-type module to the partition plate. 2. A tank-type filtration device in which a cartridge-type module in which a plurality of hollow fiber membranes are bundled is suspended and supported in a filtration tank, wherein a cartridge-type module accommodated in the filtration tank is provided at an upper end of the cartridge-type module. A through hole is formed at a predetermined position of a partition plate that is disposed and partitions an internal space of the filtration tank, and a projection that projects radially inward of the through hole is formed at a part of the through hole; The cartridge type module is inserted into the through hole, and the lower end of the cartridge head provided on the outer periphery of the upper end of the cartridge type module is brought into contact with the projecting portion, whereby the cartridge type module is suspended and supported, and expanded in the radial direction. A C-shaped retaining ring which is retractable and can be attached to and detached from the groove formed in the wall surface of the through hole at the top of the cartridge head. Tank-type filtration device, characterized in that the cartridge head of the cartridge type module engaged with a groove formed on the wall surface of the hole is fixed engaged with the partition plate. 3. An elastic member is interposed between a retaining ring engaged with a groove formed in a wall surface of the through hole and an upper end surface of a cartridge head provided on an outer peripheral portion of an upper end of the cartridge type module. The tank-type filtration device according to claim 2, wherein: 4. The tank-type filtration device according to claim 3, wherein the retaining ring and the elastic member are integrally formed. 5. The tank-type filtration device according to claim 3, wherein the elastic member is any one of a spring washer, a disc spring, a push nut, a wave washer, an O-ring, and a gasket.