JPS6274428A - Molded filter for dust collector - Google Patents

Abstract

PURPOSE:To enhance dust collection efficiency by enlarging the total area of a filter, by forming a hard filter material into an almost cylindrical form and folding back the almost cylindrical filter material at a right angle to the longitudinal direction of the filter to form the same into a freely extensible bellows shape. CONSTITUTION:A molded filter 22 is constituted by a method wherein a hard filter material is formed into an almost cylindrical shape and each surface of the cylindrical filter is repeatedly folded at fixed intervals in the longitudinal direction to continuously form a large number of ridge shaped pleats 22a.... The molded filter 22 is constituted so as to be capable of being horizontally held by the holding materials 22M, 22N mounted to a filter frame 22f in such a state that the whole thereof is stretched. Because there are no holding materials 22M, 22N in the filter in a state before the filter is mounted to a dust collector, the filter can be stored in a small folded state. Further, by forming the pleated surface, the total area of the filter can be enlarged to a large extent and the holding materials are made freely detachable and the used filter can be burnt and discarded as it is.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a molded filter suitable for use in a dry dust collector.

[Conventional technology]

FIGS. 6 and 7 show cylindrical and flat filters in which highly flexible woven fabric or felt is used as the filter medium, and the cylindrical filter 1 shown in FIG. In the case, venturi 2 to hold the cylindrical shape from the differential pressure
A gauge 2 having a diameter is inserted inside. Also, the seventh
In the case of the flat bag filter 3 shown in the figure, for example,
A gauge 4 with a holding material such as a spring 4a is inserted through the mouth 3a to maintain its shape.

On the other hand, FIGS. 8 and 9 show examples of molded filters constructed for the purpose of increasing the effective area of the filter as much as possible, and the molded filter 5 shown in FIG. , many pleats 6 on the circumference using hard filter media...
The molded filter 7 shown in FIG. As seen in this issue, by molding the hard filter medium while bending it into an abbreviated shape, pleats 8 are formed on both the circumferential surface and the bottom surface.
... and 9... are arranged in parallel to increase the filter area.

[Problem that the invention seeks to solve]

Among the filters configured as above, the latter molded filters 5 and 7 have a wider filter area by the amount of pleats 6°8.9 compared to the former cylindrical filter 1 and bag filter 3, and therefore, It can exhibit excellent dust collection effects. However, these molded filters 5, 7
In the case of a filter made of pleated hard filter media, the end face is treated with resin in advance, or the filter is molded into a substantially cylindrical shape (the shape when in use) by placing it in a mold or wooden frame as shown in the diagram.
Since it cannot be folded, the whole thing is bulky and takes up a lot of space, making it extremely inconvenient to store, store, and transport.Furthermore, the opening is equipped with a filter made of metal or resin as shown in the figure. Since the frames 5a and 7a are integrally attached, the presence of metal or resin may affect the incineration when discarded, and the venturi as shown in Fig. 6 is integrally formed. In some cases, the problem was that the venturi would also have to be disposed of, making it very uneconomical.

[Means for solving problems]

The present invention has been developed in view of the above-mentioned points, and its purpose is to minimize the space taken up as a whole when not in use, such as for storage, preservation, or transportation. The object of the present invention is to provide a molded filter for a dust collector that can be folded into a small flat shape and can be easily disposed of such as incineration. By repeatedly folding mountains and valleys perpendicularly to the longitudinal direction of the filter to form a pleated surface, the filter surface is formed into a substantially cylindrical shape, making it possible to expand and contract the entire filter in the longitudinal direction. It consists of

〔Example〕

Hereinafter, preferred embodiments of the molded filter for a dust collector according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a partially cutaway side view showing an embodiment of a dust collector using a molded filter according to the present invention.
The interior of 0 is divided into a dust collection chamber 12 and a clean room 1 by a vertical partition plate 11.
The dust collection hopper 14 is divided into two left and right chambers, and is connected to the bottom of the dust collection chamber 12. A dust suction port 15 is formed on the upper side surface of the dust collection hopper 14.
A dust suction duct 16 is connected to this dust suction port 15 .

On the other hand, an exhaust port 17 is formed on the upper side of the clean chamber 13, which is relatively smaller than the dust collection chamber 12 and formed vertically, and a suction duct 19 of a dust collection fan 18 is connected to the exhaust port 17. Further, in the figure, 20 indicates a fan motor, and 21 indicates an exhaust pipe.

Next, 22... are molded filters according to the present invention, each of which has a dust collection chamber 12 on the side surface of the vertical partition plate 11, respectively.
The venturis 22T attached to the mouth of each of these filters 22 are opened toward the clean chamber 13, respectively. Furthermore, 23 in the figure is a pulse jet dust remover, and a blow tube 24 of this dust remover 23 is piped into the clean chamber 13. Similarly, in the figure, reference numerals 25, . . . indicate jet ports formed in the blow tube 24, 26 a diaphragm valve, 27 a pilot valve, and 28 a header pipe.

Next, a specific configuration of the molded filter 22 according to the present invention will be explained based on the descriptions in FIGS. 2 to 4.

For example, by using a hard filter material such as heat-welded or resin-treated long fiber nonwoven fabric (spunbond), short fiber nonwoven fabric (needle felt), or dry/wet nonwoven fabric, the whole can be made into an abbreviated rectangular cross-section as shown in the figure. The molded filter 22 according to the present invention, which is made into a bellows shape, is formed by repeatedly folding mountain folds and valley folds at regular intervals on each side of the filter main body, which is made into a substantially rectangular cylindrical shape. . . are formed in succession, and for the vertical partition plate 11, a gasket 22d sewn 22e at the mouth is attached to the partition plate 11.
By fitting it into the filter frame 22f attached to the filter frame 22f, as shown in FIG.
22M and 22N are holding members attached to the filter frame 22f, and when the molded filter 22 is attached to the filter frame 22f, Material 22M and 22
N is inserted into the inside of the molded filter 22, and with the entire molded filter 22 slightly stretched as shown in Fig. 2,
Moreover, it is configured so that it can be held horizontally.

In the figure, 22c is a lid piece 22g sewn onto the tip opening of the molded filter 22, which is also made of the same filter material.

[Effect]

Since the molded filter for a dust collector according to the present invention has the configuration as described above, in a state before it is attached to the dust collector 10, that is, before the holding members 22M and 22N are inserted inside, the entire filter is shown in FIG. It can be folded thinly and made small.

In addition, each molded filter 22 is connected to the partition plate 11 as shown in FIG.
When the dust collector 10 is operated with the dust collector 10 installed and held horizontally by the holding members 22M and 22N, the suction force that acts in the clean room 13 through the suction duct 19 due to the rotation of the dust collection fan 18 is applied to each molded filter 22. ...through the dust collection chamber 12
and acts on the dust suction duct 16, the dust rides on this suction airflow and is sucked into the dust collection chamber 12 from the dust suction duct 16, where it is separated and collected by each shaped filter 22, and only clean air is produced. The air is sucked from the clean room 13 through the suction duct 19 and exhausted to the outside air through the exhaust pipe 21.

On the other hand, in order to prevent clogging of the molded filters 22, the pulse jet dust remover 23 is operated at predetermined intervals to remove dust from each molded filter 22, but as a result of this dust removal operation, dust falls onto the upper surface of the lower molded filter 22. The dust DS (see FIG. 4) that is generated is at each V-shaped trough 22b inclined at 45@.

The molded filters 22b are slid downward as shown by the arrows, and care is taken to prevent dust DS from accumulating on the upper surface of each molded filter 22.

〔effect〕

As described above, according to the molded filter for a dust collector according to the present invention, the total area of the filter is significantly increased and excellent dust collection is achieved by forming a pleated surface in which mountain folds and valley folds are continuous on the filter surface. In the present invention, the molded filter is made into a bellows shape that can be freely expanded and contracted in the longitudinal direction, so that the entire filter can be folded as thinly as possible, so that it can be used as a dust collector. If you fold it before installation, it won't take up as much space as conventional cylindrical molded filters, making storage, storage, and transportation very convenient, and the retaining material is removable. Since the molded filter itself is not integrally formed with metal, etc., it has the advantage that it can be incinerated as is, making disposal work extremely easy, and its effects are enormous.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view showing an embodiment of a dust collector equipped with a molded filter according to the present invention, Fig. 2 is a partially cutaway side sectional view of the molded filter according to the present invention, and Fig. 3 is the same. FIG. 4 is a front sectional view, FIG. 5 is a side view showing the entire structure folded flat, and FIG. 6 is a partially cutaway perspective view.
7 and 7 are configuration diagrams of conventional cylindrical and bag-type filters, and FIGS. 8 and 9 are perspective views showing conventional molded filters. 22 is a molded filter, 22a is a pleat, 22M, 2
2N is a holding material.

Claims (3)

[Claims] (1) By forming a pleated surface by repeating mountain folds and valley folds perpendicular to the longitudinal direction of the filter on the surface of the filter, which is formed into a substantially cylindrical shape using a hard filter medium, the entire filter can be folded in the longitudinal direction. A molded filter for dust collectors characterized by a structure that is expandable and retractable. (2) The filter is characterized in that the entire filter can be compressed and folded into a flat shape, and that the entire filter can be held in a slightly expanded state by inserting a holding material inside. A molded filter for a dust collector according to claim 1. (3) The hard filter medium is hard enough to not cause significant deformation during filtration with dust accumulated on the filter medium,
The molded filter for a dust collector according to claim 1, characterized in that the pleated portion has flexibility to the extent that it can be bent.