JPH11216308A - Filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter such as an air filter to be installed in a pipe and whose maintenance can easily and simply be carried out. SOLUTION: Since a member 30 for temporary engagement which can temporarily engage an upper housing 3 and a lower housing 4 to be divided at the time of exchanging filter elements 11 is installed, a work of attaching and detaching the lower part housing 4 to and from the upper part housing 3 can be carried out even in the state that an installation band 18 is taken out and a work of fixing these housings by the installation band 18 can be carried out separately from the former work. Consequently, a separating or assembling work can easily and reliably be carried out even by one worker and a filter 10 with excellent work efficiency is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a filter which can be installed in a piping system such as an air system or a water system to remove impurities such as dust and oil.

[0002]

2. Description of the Related Art FIG. 9 shows an example of a conventional filter which can be attached to a piping system of an air supply system or a water supply system. The filter 1 has a cylindrical housing 2 in which a cylindrical filter element 11 is accommodated coaxially along the center axis of the housing 2. In the filter 1, a housing 2 is vertically divided into an upper housing 3 and a lower housing 4, and the upper housing 3 is provided with an inflow nozzle 5 and a discharge nozzle 6. Further, in order to confirm the performance of the filter 1, a differential pressure between the inflow side and the discharge side can be measured, and a nozzle 7 for connecting the differential pressure gauge is provided. The filter element 11 is formed by filtering a material (filter material) for filtration such as hollow fiber into a cylindrical shape, and replaces the material when impurities such as dust or oil in a fluid adhere to the filter material and the differential pressure increases. Further, the filter 1 includes a lower end 3 a of the upper housing 3 and a lower housing 4.
Has a ferrule structure that can be sealed by abutting the upper ends 4a of the rims. Therefore, the lower end 3a of the upper housing 3 of the annular housing 2 and the upper end 4a of the lower housing 4
After the band 18 is attached along the band, the band 18 can be hermetically sealed by tightening the band with the fastener 13, and the fluid can be press-fitted into the filter element 11. On the other hand, the upper housing 3 and the lower housing 4 can be separated by loosening the fastening fitting 13 and removing the band 18, so that the filter element 11 can be replaced.

[0003]

Such a filter requires a small installation space and can be easily incorporated into a piping system, so that impurities such as dust and oil in a fluid flowing through an air system or a water system can be eliminated. It is often used to get rid of it. Therefore, it is important that such a filter should be able to easily and safely exchange elements. For example, in the case of an air filter, the band 18 is loosened to separate the upper housing 3 and the lower housing 4 from each other.
When the lower housing 8 is removed, the lower housing 4 may fall and be damaged unless it is securely held. Therefore,
Unless the lower housing 4 can be held by an operator, the upper and lower housings cannot be separated, and depending on the size of the filter or the design of the piping system, a plurality of operators are required to maintain one filter. Becomes

Accordingly, an object of the present invention is to provide a filter which can perform maintenance such as replacement of the filter element more safely and easily. It is another object of the present invention to provide a filter in which even a single worker can easily disassemble and assemble the housing without damaging the housing and easily replace the element.

[0005]

For this purpose, a cylindrical housing which can be divided into an upper housing and a lower housing, and a mounting band which can be fastened with the lower end of the upper housing and the upper end of the lower housing abutting on each other. In the filter capable of storing the filter element in the housing, a detachable temporary fixing member that connects the upper housing and the lower housing is provided. By installing the temporary fixing member, the upper housing and the lower housing can be connected by the temporary fixing member even if the mounting band is removed when the upper and lower housings are disassembled. Therefore, it is possible to prevent the lower housing from dropping while removing the mounting band. Also, before attaching the mounting band, the lower housing can be temporarily fixed to the upper housing with the temporary fixing member,
The mounting band can be operated using both hands. Therefore,
Even one worker can remove the mounting band, separate and assemble the housing, and perform maintenance work such as element replacement with confidence.

It is desirable that a plurality of temporary fixing members be attached at positions substantially symmetric with respect to the center axis of the filter. Thus, the upper housing and the lower housing can be temporarily fixed in a stable posture.

Further, the temporary fixing member can be installed inside or outside the housing, but by providing it inside the housing, interference with a mounting band attached outside the housing can be prevented. Therefore, the attachment position or the shape of the temporary fixing member can be easily selected. For example, it is possible to connect a leaf spring-like arm portion to the inside of the lower housing as a temporary fixing member, and to make the tip of the arm portion an engaging portion that engages a part of the lower end of the upper housing. With such a temporary fixing member, the engaging portion of the temporary fixing member engages with the upper housing simply by inserting the temporary fixing member into the lower end of the upper housing. Can be temporarily stopped.

Further, only the arm portion is prepared as the temporary fixing member, and it is only necessary to attach the arm portion to the lower housing, so that the manufacturing cost can be reduced. Of course, the arm portion may be attached to the upper housing, and the tip may be an engaging portion that engages with the upper end of the lower housing.
Further, by bending the tip of the arm portion inward to form the guide surface, the arm portion can be smoothly inserted into the upper housing or the lower housing.

[0009] Further, the arm portion, the tip of which is an engaging portion,
When inserted into these upper housings or lower housings, the leaf spring-like arms must be deformed inside the housings. If a bent portion is provided on the base end side opposite to the distal end of the arm portion, stress concentrates on that portion, so deformation of the arm portion becomes easy,
The arm can be easily inserted into the upper housing or the lower housing.

It is also possible to use a hook or a combination of hook stoppers as the temporary fixing member. In other words, by attaching an arm with a hook to the top housing and hooking the lower housing,
The upper housing and lower housing can be temporarily fixed. Of course, the arm portion may be attached to the lower housing, and the hook stopper may be attached to the upper housing. Further, such a temporary fixing member can be provided inside or outside the housing. As described above, when the temporary fixing member is provided outside the housing, it is necessary to consider interference with the mounting band.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a schematic structure of the inside of an air filter 10 according to the present invention using a cross section. The air filter 10 of this example has a cylindrical housing 2 that can be divided into an upper housing 3 and a lower housing 4, and a cylindrical filter element 11 is provided inside the housing 2 along a central axis 70 of the housing 2. And are housed coaxially. The housing 2 has a ferrule structure in which a lower end 3a of an upper housing 3 and an upper end 4a of a lower housing 4 can be sealed by abutment. On the inner side 2 a of the housing 2, two detachable leaf spring-like temporary fixing members 30 connecting the upper housing 3 and the lower housing 4 are provided at symmetrical positions with respect to the central axis 70. Further, after the lower end 3a of the upper housing and the upper end 4a of the lower housing are combined with the O-ring 17 interposed therebetween, the mounting band 18 is mounted from the outside of the housing 2 and is fixed by tightening with the fastener 13. Inside is sealed. Therefore,
When assembling the upper housing 3 and the lower housing 4, the filter 10 according to the present embodiment is temporarily fixed in a state where the upper housing 3 and the lower housing 4 are abutted with each other via a temporary fixing member 30 provided inside the housing 2. Thereafter, the upper housing 3 and the lower housing 4 can be fixed by the mounting band 18.

FIGS. 3, 4 and 5 show how the housing 2 of the filter 10 of this embodiment is assembled. As shown in FIG. 3, the temporary fixing member 30 of the present example includes a leaf spring-shaped arm 32 connected to the inside 4 b of the lower housing 4 by welding or the like, and a tip 33 of the arm.
Is an engagement portion 35 that engages with a part of the lower end 3 a of the upper housing 3. Further, a bent portion 36 is formed on the connection side (the base end 34 side) of the arm portion 32. The tip 33 of the arm 32 has a curved surface that curves toward the inside of the housing (center axis side).
Therefore, a space between the arm portion 32 and the upper end 4a of the lower housing is a guide space 37 for guiding the lower portion 3a of the upper housing to the engagement portion 35. Therefore,
When the lower housing 4 is brought close to the upper housing 3 so that the lower end 3a of the upper housing 3 enters the guide space 37 for introduction, and the arm 32 is inserted into the upper housing 3, the engaging portion 35 of the arm 32 is engaged. The lower housing 4 is temporarily fixed to the upper housing 3 by engaging with the lower end 3 a of the upper housing 3.

FIG. 4 shows a state in which the lower housing 4 is temporarily fixed to the upper housing 3. The engagement portion 35 at the tip of the arm portion 32 is engaged with the inner surface 3b of the upper housing 3 in a state of contact with the lower end 3a of the upper housing 3 and the upper end 4a of the lower housing 4 with the O-ring 17 interposed therebetween. Be stopped.

Further, as shown in FIGS. 1 and 2,
The temporary fixing member 30 having the arm portion 32 is
Are provided symmetrically with respect to. Therefore, the upper end 4 a of the lower housing 4 is abutted against the lower end 3 a of the upper housing 3, and the lower housing 4 is temporarily fixed at two symmetrical positions with the center axis 70 interposed therebetween. Therefore, the lower housing 4 can be temporarily fixed to the upper housing 3 while maintaining a stable posture. Further, since the load of the lower housing 4 can be distributed to two places, the load of one temporary fixing member is reduced. For this reason, the arm portion 32 can be made thinner or thinner, so that it can be easily inserted into the upper housing 3.

Further, in the filter 10 of this embodiment, a bent portion 36 is provided on the side of the base end 34 of the arm portion 32. For this reason, when the tip 33 or the engagement portion 35 of the arm portion 32 comes into contact with the inner surface 3b of the upper housing 3 and a force directed inward is applied, the force is concentrated on the curved portion 36 and the arm portion 32 is easily formed. Deform to the inside. For this reason, the engaging portion 35 of the arm portion 32 can be inserted with a small force up to the portion that engages with the lower end 3 a of the upper housing 3.

As described above, in the filter 10 of this embodiment, the lower housing 4 is temporarily fixed and the lower housing 4 is separated from the upper housing 3 only by abutting the upper end 4a of the lower housing 4 against the lower end 3a of the upper housing 3. The operator can release his hand from the filter 10 without falling. Therefore, the worker has both hands free, and can handle the mounting band 18 with a margin.

FIG. 5 shows that a mounting band 1 is attached to the joint between the lower end 3a of the upper housing and the upper end 4a of the lower housing 4.
8 is shown. When the mounting band 18 is narrowed, the lower end 3a of the upper housing and the upper end 4a of the lower housing 4 come into close contact with each other via the O-ring 17, and the inside of the housing becomes airtight. Therefore, the compressed air flows in and the filter 10 can be used. At this time, the engaging portion of the arm 32 is separated from the inner surface 3b of the upper housing, and the upper housing 3 and the lower housing 4 are fixed by the mounting band 18.

As described above, in the filter 10 of this embodiment, since the temporary fixing member 30 is provided on the inner side 2a of the housing 2, the upper housing 3 and the lower housing 4 are attached by the mounting band 18, and the upper housing 3 and the The lower housing 4 can be connected and temporarily fixed. For this reason,
When assembling the housing 2, the mounting band 18 can be tightened while the upper housing 3 and the lower housing 4 are temporarily fixed. On the other hand, when disassembling the housing 2, the work can be performed in the reverse order, so that the lower housing 4 does not separate from the upper housing 3 and fall even if the fastening fitting 13 is loosened and the mounting band 18 is taken off. . Thus, in the filter 10 of the present example,
It is possible for an operator to separately perform the process of combining the lower housing 4 with the upper housing 3 and the process of tightening the mounting band 18, and fix the mounting band 18 while supporting the lower housing 4 so as not to drop. ,
Conversely, there is no need to remove it. For this reason, the working posture becomes easy and the labor is reduced, and even one worker can safely assemble and disassemble the housing 2. For this reason,
Maintenance work can be made more efficient.

Further, in the filter 10 of this embodiment, since the temporary fixing member 30 is provided inside the housing 2, the mounting band 1 mounted on the outside of the housing 2 is provided.
No interference with 8 Therefore, the mounting position of the temporary fixing member 30 can be freely selected, and a shape that engages with the inside of the upper housing as in this example can be adopted as the temporary fixing member.

FIG. 6 shows another example of the temporary fixing member according to the present invention. FIG. 6A is a cross-sectional view showing a state where the upper housing 3 and the lower housing 4 are temporarily fixed using the temporary fixing member 40 of the present example. FIG.
(B) shows a state where the temporary fixing member 40 of the present example is viewed from the side. The temporary fixing member 40 of this example includes an arm portion 42 connected to the inner side 4 b of the lower housing 4, and a tip of the arm portion 42 is a hook 43 having a key shape. Furthermore, the temporary fixing member 40 of the present example includes a hook stopper 49 into which the hook 43 can be fitted, and is attached to the inside 3 b of the upper housing 3.

As described above, in the temporary fixing member 40 of the present embodiment, the lower housing 4 can be temporarily fixed to the upper housing 3 by the combination of the arm portion 42 having a hook at the tip and the hook stopper 49. ing. Since the temporary fixing member 40 of this example is also set on the inner side 2a of the housing 2, there is no need to consider interference with the mounting band 18, and the temporary fixing member 40 can be set at a position where it can be easily mounted. Further, it is desirable that the temporary fixing members 40 of the present example are also arranged at about two places at symmetrical positions.

The temporary fixing member 40 of this embodiment requires two parts, that is, a hook-shaped arm portion 42 and a hook stopper 49, so that the number of components is larger than that of the temporary fixing member 30 described above. Further, the base end 44 of the arm portion 42 needs to be fixed to the inside 4b of the lower housing by welding or the like, and the hook stopper 49 needs to be fixed to the inside 3b of the upper housing 3 by welding or the like, so that the number of assembly steps is increased. In addition, when temporarily fixed, the upper end 4a of the lower housing 4 is attached to the lower end 3a of the upper housing 3.
Not only but also hook 4
It is necessary to adjust the position so that 3 is inserted and slightly rotate it, which is troublesome.

However, in the filter 10 of this embodiment, the provision of the temporary fixing member 40 allows the upper housing 3 and the lower housing 4 to be temporarily fixed, so that the lower housing 4 is supported when the mounting band 18 is mounted. No need. Therefore, the mounting operation is very simple as described above, and even one worker can perform the operation easily and safely.

FIG. 7 shows an example of a further different arrangement of the temporary fixing member of the present invention. FIG. 7A is a cross-sectional view showing a state where the upper housing 3 and the lower housing 4 are temporarily fixed using the temporary fixing member 40 of the present example.
FIG. 7B shows the temporary fixing member 40 of this example viewed from the side. The temporary fixing member 40 is substantially the same as that described with reference to FIG. 6, and includes an arm portion 42 having a hook 43 at the tip and a hook stopper 49. Stops 49 are respectively attached to the outer surface 4c of the lower housing 4 and the outer surface 3c of the upper housing 3 by welding or the like.

Accordingly, the filter 10 of this embodiment is also provided with the upper housing 3 and the lower housing 4
Can be temporarily fixed, and the work can be performed without holding the lower housing 4 with a hand or the like when the mounting band 18 is attached or detached.

In the filter 10 of this embodiment, since the temporary fixing member 40 is mounted on the outer surface 2b of the housing, it is necessary to arrange the temporary fixing member 40 at a position where there is no interference with the mounting band 18. The position where there is no interference includes, for example, a position where the fastening fitting 13 is mounted, and a position of a connecting portion when the mounting band 18 is divided into two parts. Further, it is also possible to arrange the arm portion 42 to be largely outwardly curved so that the mounting band 18 is passed through the inside. When the temporary fixing member 40 is arranged on the outer side 2b of the housing as described above, it is necessary to consider the interference with the mounting band 18, and it takes a lot of work. On the other hand, since there is no need to use the space inside the housing, there is an advantage in that interference with the filter element 11 is easily avoided, and there is also an advantage that it is easy to confirm the engagement between the hook 43 and the hook stopper 49. .

FIG. 8 shows still another example of the temporary fixing member of the present invention. Temporary fixing member 40 of this example
Is a combination of the arm portion 42 shown in FIG. 7 having a hook-like tip 43 and a hook stopper 49 for stopping the tip 43, and these are the upper housing 3
Of the lower housing 4 and the outer side 4c of the lower housing 4, respectively. That is, the hook-shaped arm 42 and the hook stopper 49 are attached to the temporary fixing member shown in FIG. As described above, the arm portion 42 and the hook stopper 49 may be arranged on either the upper housing 3 or the lower housing 4 and are also provided for temporary fixing using the leaf spring-shaped arm portions shown in FIGS. Also in the member, the arm part is the upper housing 3
Can be attached to the inside 3b.

In the above, the present invention has been described by taking as an example an air filter installed in an air system for supplying air for process or instrumentation. However, piping for handling other fluids such as water or oil is described. Of course, the present invention can be applied to a filter installed in a system. Further, the number of temporary fixing members is not limited to the above two, but may be one. However, in order to perform temporary fixing in a stable posture, it is desirable to provide the temporary fixing members at two or three or more positions.

[0029]

As described above, the filter according to the present invention is provided with the members for temporarily fixing the upper and lower housings, and the upper and lower housings can be temporarily fixed without being fixed by the mounting band. , So that the lower housing does not fall. For this reason, the operation of attaching and detaching the upper and lower housings and the operation of fixing the upper and lower housings with the mounting band can be performed one by one in order at the time of maintenance, thereby simplifying the maintenance operation. Therefore, it is possible to provide a filter which has good work efficiency and can perform maintenance safely.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a schematic configuration of an air filter according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the air filter shown in FIG.

FIG. 3 is a diagram showing a state where an upper housing and a lower housing of the air filter shown in FIG. 1 are separated.

FIG. 4 is a view showing a state in which an upper housing and a lower housing of the air filter shown in FIG. 1 are temporarily fixed.

FIG. 5 is a diagram showing a state in which an upper housing and a lower housing of the air filter shown in FIG. 1 are fixed by a mounting band.

6A and 6B are diagrams showing an example of a temporary fixing member according to the present invention which is different from the above, in which FIG. 6A shows a cross section and FIG. 6B shows a state viewed from a side.

7A and 7B are diagrams showing still another example of the temporary fixing member according to the present invention, wherein FIG. 7A shows a cross section, and FIG. 7B shows a state viewed from the side.

8A and 8B are diagrams showing still another example of the temporary fixing member according to the present invention, wherein FIG. 8A shows a cross section, and FIG. 8B shows a state viewed from the side.

FIG. 9 is a cross-sectional view illustrating a configuration example of a conventional filter.

[Explanation of symbols]

 1, 10 Filter 2 Housing 2a Inside housing 3 Upper housing 3a Lower end of upper housing 4 Lower housing 4a Upper end of lower housing 11 Filter element 13 Clamping bracket 17, O-ring 18, mounting band 30, 40, temporary fixing member 32, arm portion 33, distal end 34, base end 35, engaging portion 36, curved portion 37, guide space 42 ..Arm part 43..Top end 44..Base end 49..Hook stop 70..Coaxial filter

Claims (6)

[Claims] 1. A tubular housing that can be divided into an upper housing and a lower housing, and a mounting band that can be tightened in a state where a lower end of the upper housing and an upper end of the lower housing are abutted with each other; A filter capable of storing a filter element, comprising: a detachable temporary fixing member that connects the upper housing and the lower housing. 2. The filter according to claim 1, wherein the plurality of temporary fixing members are mounted at positions substantially symmetric with respect to a center axis of the filter. 3. The filter according to claim 1, wherein the temporary fixing member is mounted inside the housing. 4. The temporary fixing member according to claim 3, further comprising a leaf spring-like arm connected to the inside of the upper housing or the lower housing, and a tip of the arm portion being a part of the lower housing or the upper housing. A filter having an engagement portion that engages with the filter. 5. The filter according to claim 4, wherein a bent portion is formed on a base end side of the arm portion. 6. The temporary fixing member according to claim 1, wherein the temporary fixing member is connected to an upper housing or a lower housing,
An arm part having a hook-like tip at the tip thereof, and a hook stopper, wherein a base end of the arm part is attached to the upper housing or the lower housing, and the hook stopper is attached to the lower housing or the upper housing. A filter characterized in that it has been used.