JP2009142813A - Dust collector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dust collector capable of being operated without reducing dust-collection performance by a flow-regulation mechanism for preventing re-deposition onto a filter even in the case of a fine particle and a dust of light specific gravity. <P>SOLUTION: The dust collector is provided with a housing which is zoned into an inlet chamber to which dust-containing air flows-in from a suction port, a dust-collecting chamber installed with a filter, and a cleaning chamber to which air captured with the dust flows-in by the filter, wherein the inlet chamber and the dust-collecting chamber are partitioned by a plate mounted with the filter; a scraping off apparatus arranged at the cleaning chamber side; and the flow-regulation mechanism arranged at an inner side of the suction port so as to partition the inlet chamber and the dust-collecting chamber. The flow-regulation mechanism is arranged such that an opening part into which the dust-containing air flows is provided between an upper end part of the flow-regulation mechanism and an inner wall surface of the plate. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a dust collector. More specifically, in a dust collector that collects air containing dust (dust-containing air) sucked into a housing from a processing machine such as a plasma cutting machine by a blower, dust that has been peeled off from the filter by a dusting device flows into the dust collector. The present invention relates to a dust collector equipped with a rectifying mechanism that causes a flow in a housing to flow downward by flowing a large amount of dust-containing air in the housing upward in order to prevent the dust-containing air from adhering to the filter again.

  2. Description of the Related Art Conventionally, there is a dust collector provided with a rectifying mechanism that partitions a housing (airframe) into an inlet chamber into which dust-containing air flows and a dust collection chamber in which a filter is installed.

  As an example of the rectifying mechanism of the dust collector, as shown in FIGS. 6 to 8, punched holes 102 a are formed on the entire surface so that the dust-containing air sucked into the inlet chamber S 1 of the housing 101 has a distributed rectifying effect in the housing 101. Some of them are composed of a pair of rectifying plates 102 having holes formed therein.

  In this dust collector, the dust-containing air sucked into the inlet chamber S <b> 1 from the suction port 101 a flows into the dust chamber S <b> 2 through the rectifying plate 102, dust is collected by the filter 103, and clean air passes through the filter 103 to the discharge port of the dust collector. 101b is exhausted. The dust collected by the filter 103 is peeled off from the filter 103 by the removing device 105 provided in the clean chamber S3 partitioned by the plate 104, and collected by the hopper 106 provided at the lower part of the housing 101. However, since the dust generated from the plasma cutting machine is fine particles and light specific gravity, it takes a long time to fall to the hopper 106.

  Conventionally, since the opening S1a at the lower end of the inlet chamber S1 has a large structure, the dust-containing air flows uniformly to the filter 103 in the dust collecting chamber S2 through the hole 102a of the rectifying plate 102. There is also a flow that goes from below the flow straightening plate 102 to the dust collection chamber S2 via S1a, and this flow becomes an ascending airflow Y1 in the dust collection chamber S2, as shown in FIG. Due to the rising airflow Y1, the fine dust once removed in the dust collecting chamber S2 takes on the airflow before dropping into the hopper 106 and adheres to the filter 103 again (hereinafter this phenomenon is referred to as reattachment). . Due to this redeposition, the conventional dust collector has a problem of deteriorating the dust collection performance.

  As another dust collector, a rectifying plate and a ceiling plate having punch holes, and a rectifying mechanism comprising an inclined plate gradually inclined toward the inner wall surface of the opposing housing, below the rectifying plate (For example, refer to Patent Document 1).

  In other dust collectors, if the dust is fine, reattachment due to the above-described updraft may occur.

Japanese Utility Model Publication No. 7-39915

  Therefore, in view of the above circumstances, the present invention provides a dust collector that can be operated without deteriorating dust collection performance by a rectifying mechanism that prevents reattachment to a filter even in the case of fine particles or light specific gravity dust. For the purpose.

  In the dust collector of the present invention, the entrance chamber into which dust-containing air flows from the suction port, the dust collection chamber in which the filter is installed, and the entrance chamber and the dust collection chamber are partitioned by a plate to which the filter is attached, and dust is collected by the filter. A housing that is partitioned into a clean chamber into which collected air flows, a removal device that is disposed on the clean chamber side, and an inlet chamber and a dust collection chamber that are partitioned inside the suction port. A dust collector comprising a rectifying mechanism, wherein the rectifying mechanism is arranged with an opening through which the dust-containing air flows between an upper end portion of the rectifying mechanism and an inner wall surface of the plate. It is said.

  According to the present invention, the dust-containing air that has flowed into the dust-collecting chamber is obtained by flowing dust-containing air above the dust-collecting chamber from an opening provided between the upper end of the rectifying mechanism and the inner wall surface of the plate. Can be prevented from adhering to the filter again by the airflow from below the rectifying mechanism.

  Thereby, since the progress of clogging of the filter can be suppressed, the operation can be continued without deteriorating the dust collection performance.

It is a front view of the dust collector concerning one embodiment of the present invention. It is a side view of the dust collector shown in FIG. It is sectional drawing along the II line | wire of FIG. It is a figure which shows the flow of the dust containing air which flowed into the inlet chamber in order to demonstrate the rectification | straightening mechanism in this Embodiment. It is a figure explaining the baffle plate in other embodiment. It is a side view of the conventional dust collector. It is a longitudinal cross-sectional view of the conventional dust collector. It is a figure which shows the flow of the dust containing air which flowed in in the inlet chamber in order to demonstrate the effect | action of the rectification | straightening mechanism of the conventional dust collector.

  The dust collector of the present invention can be applied as a processing machine to, for example, a dust collector that collects dust generated by a plasma cutting machine or a facility that generates fume dust.

  Hereinafter, the dust collector of the present invention will be described with reference to the accompanying drawings. As shown in FIGS. 1 to 3, a dust collector according to an embodiment of the present invention includes a housing 3 supported by a base 1 and provided with a hopper 2 at a lower portion, and a payment unit attached to the housing 3. A dropping device 4 and a rectifying mechanism 5 are provided. The dust collector is connected to a blower (not shown) that sucks dust generated from the processing machine together with air.

  The housing 3 includes an inlet chamber 6 into which dust-containing air (dust-containing air) flows from the suction port 3 a, a dust collection chamber 8 in which filters 7 are installed on both sides of the inlet chamber 6, and dust collection by the filter 7. It is partitioned into a clean room 9 into which the collected air flows. The clean chamber 9 is partitioned from the inlet chamber 6 and the dust collection chamber 8 by a plate 10 to which the filter 7 is attached. And the dropping device 4 is installed in the said clean room 9 side. The dropping device 4 includes a blow tube 11, a compressed air tank, a valve, and the like. In the present embodiment, only the blow tube 11 is illustrated. The blow tubes 11 are arranged along a row of filters 7 suspended in the dust collection chamber 8.

  The rectifying mechanism 5 is arranged so as to partition the inlet chamber 6 and the dust collecting chamber 8 from the inside of the suction port 3 a, that is, the inner wall surface of the housing 3. The rectifying mechanism 5 is arranged so that an opening S through which the dust-containing air flows is provided between the upper end portion of the rectifying mechanism 5 and the inner wall surface 10 a of the plate 10. The straightening mechanism 5 in the present embodiment is composed of a pair of straightening plates 23 in which a punch plate 21 having punch holes 21a and a flat plate 22 having no punch holes in the lower portion of the punch plate 21 are combined.

  The upper end portion 23a of the current plate 23 is positioned above the opening position (upper end position) of the suction port 3a. Thereby, the influence of the direct collision of dust-containing air can be reduced.

  In addition, if the lower portions of the pair of rectifying plates 23 completely block the lower end portion of the inlet chamber 6, dust that has been shaken off due to changes in the air flow in the inlet chamber 6 accumulates and is guided to the hopper 2. Since it is not possible, the opening is set so as not to be deposited.

  Further, an inclined plate 24 extending toward the inlet chamber 6 can be provided at the lower end of the flat plate 22. By providing the inclined plate 24, the opening area of the lower end portion of the inlet chamber 6 can be reduced, so that downstream of the dust-containing air is suppressed.

  In addition, the arrow Y in FIG. 4 has shown the flow of the dust containing air which flowed in from the suction port 3a. Dust-containing air that has flowed in from the suction port 3a is directed to the punch plate 21 corresponding to the intermediate portion located on the side of the front, but since the upper portion is the opening S, a large amount of airflow flows into the opening S. The filter 7 (in particular, the upper part of the filter 7) located in front of the filter collects a lot of dust. However, when the clogging of the upper part of the filter 7 progresses, the dust-containing air moves toward the middle part or the lower part of the filter 7, which causes a descending airflow. By making the lower part into the flat plate 21 and the inclined plate 24, the airflow is reduced, the airflow flowing from the lower part of the rectifying plate 23 to the dust collecting chamber 8 is reduced, and the rising airflow is suppressed.

  Therefore, the rectifying plate 23 has a dispersion rectification effect of the dust-containing air so that the direct collision of the dust-containing air with the filter 7 is reduced and the filter 7 is uniformly loaded.

  In the present embodiment, the dust-containing air flows into the inlet chamber 6 in the housing 3 from the suction port 3 a, and a part of the rectifying plate 23 partitions the dust collecting chamber 8 where the filter 7 is installed and the inlet chamber 6. The coarse dust falls to the hopper 2 which acts as a chute by impact, and the fine dust enters the dust collecting chamber 8 through the air current and is collected by the filter 7 and is dropped to the hopper 2 by the dusting device 11. The clean air that has passed through the filter 7 passes through the plate 10 that partitions the dust collection chamber 8 and the clean chamber 9, and is exhausted from the discharge port 3b.

  The rectifying plate 23 according to the present embodiment is positioned and attached in the housing 3. In this attaching operation, for example, as shown in FIG. 5, an opening having a size that allows a large amount of dust-containing air to flow in. While securing the portion S, by providing support members 31 at both ends of the upper end portion 23a of the rectifying plate 23 and positioning the plate 10 with respect to the inner wall surface 10a, the positioning accuracy of the rectifying plate 23 is improved and the working time is reduced. Shortening can be achieved.

DESCRIPTION OF SYMBOLS S Opening part 1 Base 2 Hopper 3 Housing 3a Suction port 3b Discharge port 4 Drawer device 5 Rectification mechanism 6 Inlet chamber 7 Filter 8 Dust collection chamber 9 Clean chamber 10 Plate 10a Plate inner wall surface 11 Blow tube 21 Punch plate 21a Punch Hole 22 Flat plate 23 Current plate 23a Upper end 24 Inclined plate

Claims (3)

The inlet chamber into which dust-containing air flows from the suction port, the dust collecting chamber in which the filter is installed, and the inlet chamber and the dust collecting chamber are partitioned by the plate to which the filter is attached, and air in which dust is collected flows in. A housing that is partitioned into a clean chamber;
A scraping device disposed on the clean chamber side;
A dust collector comprising a rectifying mechanism disposed inside the suction port so as to partition the inlet chamber and the dust collecting chamber,
A dust collector in which the rectifying mechanism is disposed with an opening through which the dust-containing air flows between an upper end portion of the rectifying mechanism and an inner wall surface of the plate. 2. The dust collector according to claim 1, wherein the rectifying mechanism includes a rectifying plate in which a punch plate having a punch hole and a flat plate having no punch hole are combined to face each other. The dust collector according to claim 2, wherein an inclined plate extending toward the inlet chamber is provided at a lower end portion of the flat plate.