JPH0728903Y2 - Dust collection bag in dust collector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a dust collecting bag in a dust collector that filters dust in the air to collect the dust.

[Conventional technology]

The dust collector to which the present invention is applied is a well-known dust collector that is installed in various factories that generate dust, for example, a foundry, and basically, a plurality of box-shaped dust filters are provided. The dust collecting bag is installed in the filter chamber of the dust collector, dust air is introduced into the filter chamber, and the filter cloth of the dust bag is passed through to take out clean air to the outside.

Since the dust collection bag becomes clogged as the filtration progresses, it is necessary to occasionally remove dust adhering to the filter cloth.

As one means for this, a high pressure gas is discharged from a discharge port (one end of the box-shaped bag) for taking out the clean air of the dust collection bag at a predetermined time interval in the direction opposite to the flow of the clean air, that is, the collected air. A method has been devised in which the dust is sprayed into the dust bag, and then the filter cloth of the dust collection bag is vibrated to remove the dust that adheres to the filter cloth and causes clogging. At the time of injecting the high-pressure gas, it is preferable to stop the suction and exhaust of the clean air once, but the high-pressure gas may be injected as it is.

[Problems to be solved by the device]

However, it has been found that, while performing such peeling removal of dust, the clogging of dust increases for a long time during long-term use and the peeling removal efficiency deteriorates.

As a result of a detailed analysis of this, high-pressure air is uniformly ejected to the dust collection bag, so that the filter cloth vibrates with substantially the same period as a whole, and as a result, the filter cloth pulsates as a whole and clogging We have come to the conclusion that dust may be difficult to peel off.

The present invention solves this problem and eliminates clogging of the filter cloth.
The purpose is to remove efficiently with a simple structure and to always keep the filtration efficiency of the dust collection bag high.

[Means for Solving the Problems]

The dust collecting bag in the dust collector according to the present invention has a plurality of surfaces each of which has a surface covered with a filter cloth and is formed in a hollow shape, and has a function of taking out clean air to one side and a function of enhancing a high pressure air injection effect. A dust collection bag comprising a venturi is installed in the filtration chamber of the dust collector, and dust-containing air is configured to pass through the filter cloth and be taken out from the venturi to remove dust adhering to the surface of the filter cloth. In a dust collecting bag in a dust collector configured to vibrate and separate with high pressure air, at least one dividing plate is provided inside the dust collecting bag, and the inside of the dust collecting bag is arranged in the injection direction of the high pressure air. I took the measure of partitioning along.

The number of the dividing plates in the present invention may be two or three, and its shape is not important.

[Action]

The present inventor, as a result of uniformly injecting high-pressure air into the dust collection bag when separating dust that causes clogging of the filter cloth,
Based on the understanding that the filter cloth oscillates in approximately the same cycle as a whole, so that the filter cloth pulsates uniformly as a whole and clogging dust is difficult to be separated, the action of high pressure air on the filter cloth is In order to make it locally different, the inside of the dust collecting bag was partitioned by the dividing plate, and the vibration of this filter cloth was made locally different.

As a result, the filter cloth itself causes a slight waviness phenomenon, and the dust is removed very efficiently.

In particular, the presence of this dividing plate not only acts to cause partial vibration of the filter cloth by dividing the flow of high-pressure air, but also the cycle of expansion of high-pressure air and partial reflection (partial passage) by the filter cloth. Has the effect of making each individual different. In particular, some reflection (partial passage) of high-pressure air from the filter cloth
Since the degree of clogging on the surface of the filter cloth differs depending on the location, it is considered that the local vibration of the filter cloth may be slightly different due to this, and as a result, minute waviness may occur. .

〔Example〕

Hereinafter, a preferred embodiment of the dust bag in the dust collector according to the present invention will be described in detail with reference to the drawings.

Although not shown, the dust collecting bag in the dust collector according to the present invention is a dust collector known per se, that is, the surface is covered with a filter cloth to form a hollow and has a function of taking out clean air to one side. , A dust collection bag comprising a plurality of venturis having a function of enhancing the injection effect of high-pressure air is installed in the filter chamber of the dust collector, and dust-containing air is passed through the filter cloth and taken out from the venturi to the outside. The dust collector attached to the surface of the filter cloth is configured to be vibrated by high-pressure air to separate the dust.

As shown in FIGS. 1 to 3, a seat plate 3 having a large number of funnel-shaped venturis 2 provided in the vertical direction is fixed to one surface of an opening 1 having a rectangular cross section, Wires 5 and 6 are knitted continuously on the surface 4 to form a flat box-shaped retainer 7.

From the center of the opening 1 of the retainer 7 toward the other end 8,
By attaching a split plate 9 obtained by bending a flat steel plate,
The inside of the retainer 7, that is, the dust collection bag is divided along the above-mentioned injection direction of high-pressure air. In this example,
Although only one dividing plate 9 is provided, two or three dividing plates 9 may be provided depending on the size of the retainer 7.

The outer periphery of the retainer 7, that is, the outer side of the dust collecting bag is covered with a filter cloth 10, which allows dust to be filtered when installed in the filter chamber of the dust collector.

Reference numeral 11 denotes a compressed air pipe, which is located in the exhaust path of the clean air in the dust collector, 12 denotes a plurality of injection pipes, and these injection pipes 12 are installed opposite to the venturi 2 respectively.

Therefore, normally, the dust-containing air passes through the filter cloth 10 while leaving the dust on the surface of the filter cloth 10 from the surface of the filter cloth 10 and enters the inside of the dust collecting bag, here, the inside of the retainer 7. From there, the clean air passes through the venturi 2 and is sucked and exhausted to the outside through the exhaust passage in which the compressed air pipe 11 is located.

Then, in order to separate and remove the clogging of the filter cloth 10, intermittently high-pressure air is injected from the injection pipe 12, and the retainer 7 is expanded while being bisected by the dividing plate 9 via the venturi 2. The filter cloth 10 is locally oscillated in a minute wavy shape by being blown into the interior of the filter cloth.

[Effect of device]

According to the present invention, the clogging of the filter cloth of the dust collecting bag used in the dust collector described above can be removed extremely efficiently as compared with the conventional one, so that the filtration efficiency of the dust collecting bag can be maintained high for a long period of time. It was

And, such a remarkable effect can be achieved by the simple structure of the dividing plate, and there is an advantage that a great economic effect is brought in comparison with the effect.

[Brief description of drawings]

The drawings show an embodiment of a dust collecting bag in a dust collector according to the present invention. Fig. 1 is a partially cutaway front view of the dust collecting bag, and Fig. 2 is a sectional view taken along line AA in Fig. 1. FIG. 3 is an exploded perspective view of the entire dust collecting bag. In the figure, 1 ... Aperture, 2 ... Venturi, 9 ... Dividing plate, 10
...... Filter cloth

Claims (1)

[Scope of utility model registration request] 1. A plurality of venturis each having a surface covered with a filter cloth and formed into a hollow, and having a function of taking out clean air to one side and a function of enhancing a jetting effect of high-pressure air. The dust bag is installed in the filter chamber of the dust collector, and the dust-containing air is configured to pass through the filter cloth to be extracted from the venturi to the outside. In a dust collecting bag in a dust collecting device configured to be separated, in the dust collecting bag in which at least one dividing plate is provided inside the dust collecting bag and the inside of the dust collecting bag is partitioned along the injection direction of the high pressure air. Dust collection bag.