JP2523598Y2 - Filter body support - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention permeates a fluid filled in a tank or the like or a fluid flowing through a pipe from the outside to the inside of a cylindrical filter body formed of a wire mesh or a nonwoven fabric. The present invention relates to an improvement in a support for supporting a filter from the inside so that the filter does not deform due to the pressure of a fluid.

[0002]

2. Description of the Related Art In a filter configured to filter a fluid with a cylindrical filter, the filtering mode is described in, for example, Japanese Patent Application Laid-Open No.
As described in US Pat. No. 15,319, there are a type in which a fluid permeates from the inside to the outside of the filter, and a type in which a fluid permeates from the outside to the inside of the filter.

[0003] In Japanese Patent Application Laid-Open No. 1-215319, a support on which a filter is fitted is formed so that a single plate-like support portion extends spirally, and the support is formed as a screw blade as a whole. It is described to form. When the screw blade is formed in this manner, for example,
Unlike the case of supporting with a wire-made support as described in JP-A-7567, JP-A-47-8843, or JP-A-63-65920, Since the swirling flow that flows while rotating around the axis can be provided, there is an advantage that the fluid can be efficiently discharged.

However, in the case where the support is formed in a screw blade shape and a fluid permeates from the outside to the inside of the filter, in order to improve the function of supporting the filter, it is necessary to improve the function of the filter by the plate-shaped support portion. The supporting span must be reduced, in other words, the pitch of the spiral in the plate-like supporting portion must be reduced.
In the device disclosed in Japanese Patent Application Laid-Open No. H11-157, there is a problem that when the pitch of the plate-like support portions is reduced in order to improve the support function of the filter, the flow resistance of the fluid increases and the filtration efficiency decreases rather. SUMMARY OF THE INVENTION It is an object of the present invention to provide a support in which the support function of a filter is significantly improved without increasing the flow resistance of a fluid.

[0005]

In order to achieve this object, the present invention provides a method for fixing a cylindrical filter at a location of a fluid discharge port in a body of a filter. A support that is provided so as to cover the filter body, and includes a plurality of plate-shaped support portions that extend spirally around the axis, and each plate-shaped support portion is supported by the axis of the support. By connecting, each plate-shaped support portion is formed so as to form a multi-thread screw blade shape, and formed so as to support the inner surface of the filter body at the outer peripheral edge of each plate-shaped support portion. '' did.

[0006]

According to this structure, since each plate-like supporting portion extends spirally and is formed as a screw blade as a whole, the fluid flowing into the filter from the outside can be rotated around the axis. The fluid is discharged from the fluid outlet as a swirling flow. And since it is formed by a plurality of plate-shaped support portions, the pitch of the plate-shaped support portions can be reduced under a state in which the lead angle of each plate-shaped support portion is increased, whereby the filtration Without increasing the flow resistance of the fluid in the body,
The support span of the filter by the plate-shaped support portion can be reduced.

As described above, according to the present invention, in a support for applying a swirling flow to a fluid in a filter body, the support of the filter body by a plate-shaped support portion without increasing the flow resistance of the fluid in the filter body. Since the span can be reduced, the fluid can be smoothly transmitted without deforming the filter, so that the filtration efficiency and the filtration performance can be improved.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a tank constituting the main body of the filter, reference numeral 2 denotes a fluid, and a filtration device 3 is provided at a location of the discharge port 4 in the tank 1. The filtering device 3 includes a bush 5 detachably screwed to the discharge port 4 of the tank 1, a rod-shaped support 6 fixed to the bush 5, and a cylindrical filter fitted on the support 6. 7 is provided.

The support 6 has four plate-like support portions 6a extending spirally around the axis.
By connecting a at the center of the shaft, a is formed so as to form a multi-thread screw blade as a whole. Accordingly, four spiral grooves 8 corresponding to the plate-like support portions 6a are formed in the support 6. In the embodiment, the plate-like support portion 6a is
Although it is formed as a strip, the plate-shaped support portion 6a may have two or three or five or more strips.

The lower end 6b of the support 6 is formed to have a small diameter, which is closely fitted to the bush 5. Support 6
Has a head portion 6 having an outer diameter substantially the same as the outer diameter of the filter 7.
c is integrally formed. The filter 7 is formed of a porous material such as a wire mesh or a nonwoven fabric, and is fixed to the bush 5 by welding or the like. The inner peripheral surface of the lower end of the bush 5 is formed in a hexagonal hole 5a for engaging a wrench when attaching and detaching the bush 5 to and from the tank 1.

In the above configuration, the fluid 2 in the tank 1
Penetrates the filter body 7 from the outside to the inside, and the filtered fluid 2 is discharged from the discharge port 4. Thus, the support 6
Are formed so as to extend spirally, the fluid 2 in the filter 7 is given directionality so as to flow along each plate-like support 6a, and the fluid 2 Is discharged from the discharge port 4 as a swirling flow.

Further, by forming the plurality of plate-like support portions 6a, the pitch P of the plate-like support portions 6a can be reduced in a state where the lead L of each plate-like support portion 6a is increased. The support span (pitch) P of the filter 7 by the plate-shaped support portion 6a can be reduced without increasing the flow resistance of the fluid 2 inside the filter 7. In other words, the fluid 2 can be appropriately swirled in a state where the support span P with respect to the filter 7 is reduced.

Since the bending strength of the filter 7 is improved by reducing the support span P, and the deformation of the filter 7 can be prevented, the flow resistance of the fluid 2 when passing through the filter 7 increases. Instead, the fluid 2 passes through the filter 7 smoothly. As described above, the smooth permeation of the fluid 2 through the filter 7 and the ability to impart an appropriate swirling flow to the fluid 2 within the filter 7 can improve the filtration efficiency and the filtration performance. is there.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

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

FIG. 3 is a sectional view taken along line III-III of FIG.

[Brief description of reference numerals]

 DESCRIPTION OF SYMBOLS 1 Tank 2 Fluid 3 Filtration device 4 Outlet 6 Support 6a Plate-like support part 7 Filter 8 Spiral groove

Claims (1)

(57) [Scope of request for utility model registration] 1. A cylinder at a fluid discharge port in a filter body.
Fixed at the fluid discharge port to hold the filter
A support that is provided so as to fit the filter
The support has a plurality of plate-like supports extending spirally around the axis.
Holding part, and connect each plate-shaped support part with the axis of the support.
By contact, each plate-shaped support part
It is formed so as to form a root shape, and the outer peripheral edge of each of the plate-shaped support portions is
That it is formed to support the inner surface of the filter body
A support for a filter body characterized by the following.