JP5446010B2 - Dust collector - Google Patents

Description

In the present invention, a plurality of through-holes are formed by a bottomed upper and lower cylindrical duct chamber formed with an inlet for introducing dust-containing air and a filter chamber provided with a filter for filtering dust-containing air. Obtained by filtering the dust-containing air, which is arranged adjacent to the side with a flat plate-shaped rectifying plate interposed, and flows from the duct chamber to the filter chamber through a plurality of through holes. The present invention relates to a dust collector that discharges clean air from a filter chamber.

  In such a dust collector, there is a case in which a configuration for suppressing the airflow of dust-containing air from concentrating at a specific location and intensively wearing a filter near the specific location is employed. For example, in Patent Document 1, a dust-containing air inlet is provided on a side surface of a duct chamber, and the dust-containing air is horizontally introduced into the duct chamber along a rectifying plate interposed between the duct chamber and the filter chamber. I let it flow. A plurality of partition plates are arranged at an interval from each other in a state inclined at a predetermined angle with respect to the flow direction of the dust-containing air, and a partition plate having a plurality of through holes for the air flow of the dust-containing air The distribution of the flow rate of the dust-containing air that is allowed to flow into the filter chamber is adjusted by dividing a part of the airflow that has collided with the partition plate as an airflow toward the filter chamber.

  Moreover, in the dust collector disclosed in Patent Document 1, the opening ratio is changed by increasing or decreasing the number of through holes per unit area between the upper part and the lower part of the rectifying plate interposed between the duct chamber and the filter chamber. Thus, the flow rate of the dust-containing air per unit area of the rectifying plate that flows into the filter chamber through these through holes is made uniform. Thereby, it is supposed that the distribution of the dust load to the filter arranged in the filter chamber can be made uniform.

JP-A-8-215607

In the dust collector disclosed in Patent Document 1, the inlet is disposed on the side surface of the duct chamber. In this manner, the duct chamber and the filter chamber are adjacent to each other with the current plate interposed therebetween. For example, there is a case in which a dust collector having a configuration arranged as described above is configured such that the introduction port is disposed on the upper side of the duct chamber and the dust-containing air flows from the upper portion to the lower portion in the duct chamber. In the dust collector having this configuration, the dust-containing air flowing from the upper part to the lower part in the duct chamber has a flow rate at the central part in the horizontal direction of the rectifying plate as viewed from the front of the rectifying plate. It becomes faster than the flow speed of other parts.
In this case, if the flow speed of the dust-containing air introduced into the duct chamber is increased, the flow speed of the dust-containing air flowing to the filter chamber through the plurality of through holes also increases. Among the flowing dust-containing air, the relatively high-speed dust-containing air flowing through the central part of the rectifying plate in the horizontal direction is relatively fast (highest in the horizontal direction) to the filter disposed in the filter chamber. There is a possibility that the filter may be worn or damaged due to direct collision at a speed).

  In addition, since the flow velocity is not uniform between the central portion and other portions in the horizontal direction of the rectifying plate, the dust load is biased due to the difference in the position of the filter in the filter chamber, and the wear of the filter is reduced. It was unevenly distributed. As a result, even if a filter with a small dust load can exhibit a sufficient dust collection capacity without performing a dusting process, it is necessary to perform a dusting process for a filter with a large dust load. The operability of was reduced.

  The present invention has been made in view of the above circumstances, and its purpose is to suppress the flow speed of dust-containing air in the central portion in the horizontal direction of the current plate in the front view of the current plate, The object is to provide a dust collector capable of making the flow velocity uniform.

In order to achieve the above object, a dust collector according to the present invention includes a bottomed upper and lower cylindrical duct chamber formed with an inlet for introducing dust-containing air, and a filter for filtering the dust-containing air. The filter chamber is disposed adjacent to the side with a flat rectifying plate having a plurality of through holes interposed therebetween, and passes from the duct chamber to the filter chamber through the plurality of through holes. In the dust collector that filters the flowed dust-containing air through the filter and discharges clean air obtained by the filtration from the filter chamber, the introduction port is disposed above the duct chamber, Dust air is introduced in a direction along the rectifying plate from the upper part to the lower part of the duct chamber, and is passed through from the duct chamber to the filter chamber through the plurality of through holes. The rectification Viewed from the front, in the central portion in the horizontal direction in the plane portion of the rectifying plate, the no plurality of through-holes imperforate portion strip is formed along the vertical direction Rutotomoni, in the plane portion of the current plate A perforated band having a plurality of through holes is formed on both sides of the non-porous band along the vertical direction, and the filter is disposed in the filter chamber in a front view of the rectifying plate. At least a part of the disposition portion is disposed at a position overlapping with the perforated portion band formed in the flat portion of the current plate .

  According to this feature configuration, with respect to the flow speed of the dust-containing air flowing through the through hole of the rectifying plate, the maximum flow speed in the horizontal direction can be suppressed and the flow speed can be made uniform. it can. That is, among the dust-containing air flowing from the upper part to the lower part of the duct chamber, the flow speed of the dust-containing air in the central part in the horizontal direction of the rectifying plate is maximized. Since a non-perforated belt without a plurality of through holes is formed along the vertical direction in the central portion in the horizontal direction, the flow of dust-containing air from the duct chamber to the filter chamber is performed in the central portion. Limited. Thereby, about the flow speed of dust-containing air, the maximum speed in a horizontal direction can be suppressed and the flow speed can be made uniform. Therefore, it is possible to prevent the filter from being damaged and to disperse the wear without uneven distribution, thereby contributing to an improvement in the service life of the filter and maintaining the filter's dust collection ability efficiently. Contributes to improving the dust collection capability of the dust device.

  According to a further feature of the dust collector according to the present invention, the filter is constituted by a plurality of tubular filter cloths, and is suspended from the upper part to the lower part in the filter chamber. The filter is provided with a non-filter arrangement portion in which the plurality of cylindrical filter cloths are not arranged in a central portion in the horizontal direction of the filter chamber in a front view of the rectifying plate.

  This characteristic configuration is a configuration that can be adopted with respect to the arrangement of the filters in the filter chamber in order to efficiently exhibit the dust collection capability of the filter. According to this characteristic configuration, since the filter chamber is provided with the filter non-arrangement portion in which the plurality of cylindrical filter cloths are not disposed in the central portion in the horizontal direction of the filter chamber when the rectifying plate is viewed from the front, In the filter chamber, the flow space has the smallest flow path resistance. Therefore, the filter non-arrangement portion is a space through which gas is most likely to flow in the filter chamber, and serves as a flow path that promotes the flow of dust-containing air flowing into the filter chamber from the rectifying plate side to the back side. . By forming such a flow path in the center of the filter chamber, it is possible to promote the diffusion of dust-containing air in the filter chamber, and not only the filter close to the rectifying plate but also the entire filter disposed in the filter chamber. It can function effectively. Thereby, the dust collection capability of the filter can be exhibited efficiently. Moreover, since it can disperse | distribute, without distributing the wear of a filter unevenly, it contributes to the improvement of the lifetime of an installation.

  A further characteristic configuration of the dust collector according to the present invention is that the rectifying plate is formed of a plurality of rectifying plates arranged in parallel at intervals, and is formed on the rectifying plate on the side close to the filter chamber. The hole band is formed to be wider than the non-hole band formed on the current plate on the side close to the duct chamber.

This characteristic configuration is a configuration that can be adopted with respect to the current plate in order to efficiently exhibit the dust collection capability of the filter. According to this characteristic configuration, the dust-containing air needs to pass through the through holes of the plurality of rectifying plates when flowing from the duct chamber to the filter chamber. Thereby, the flow rate of the dust-containing air from the duct chamber to the filter chamber can be further suppressed.
In addition, since the non-porous part of the rectifying plate near the filter chamber is formed wider than the non-porous part of the rectifying plate near the duct chamber, the dust-containing air flowing from the duct chamber to the filter chamber In the flow, it is possible to more effectively restrict the flow in the central portion in the horizontal direction of the rectifying plate where the flow velocity is maximum, and to make the air flow velocity in the horizontal direction of the rectifying plate uniform. As a result, the wear of the filter can be dispersed without being unevenly distributed, so that the dust collection capability of the filter can continue to be exhibited efficiently, contributing to the improvement of the dust collection capability of the dust collector. It also contributes to the improvement of the service life of the equipment.

  A further characteristic configuration of the dust collector according to the present invention is that the plurality of through holes formed in one of the adjacent rectifying plates are formed in the other of the adjacent rectifying plates in a front view of the plurality of rectifying plates. Further, it is arranged at a position not overlapping with the plurality of through holes.

According to this characteristic configuration, in a front view of the plurality of rectifying plates, the plurality of through holes formed in one of the adjacent rectifying plates are positioned so as not to overlap with the plurality of through holes formed in the other of the adjacent rectifying plates. Therefore, the dust-containing air cannot pass through the through holes of the plurality of rectifying plates only by going straight in the front view direction of the plurality of rectifying plates. That is, when dust-containing air flows from the duct chamber to the filter chamber, collision with the rectifying plate and detour (bending) along the rectifying plate are likely to occur.
Therefore, when the dust-containing air flows from the duct chamber to the filter chamber, a longer flow path length is required due to bending due to the collision with the rectifying plate. It is possible to improve the dust capture rate of the current plate. Thereby, the wear and breakage of the filter in the filter chamber are suppressed, which contributes to the improvement of the service life of the equipment.

Schematic block diagram of the dust collector according to the first embodiment The front view of the baffle plate of the dust collector which concerns on 1st Embodiment The enlarged view explaining arrangement | positioning of the baffle plate of the dust collector which concerns on 1st Embodiment

[First Embodiment]
1st Embodiment of the dust collector which concerns on this invention is described based on FIGS. 1-3.
FIG. 1 is a schematic configuration diagram of a dust collector, where (a) is a longitudinal sectional view taken along line Ia-Ia in (c), and (b) is taken along line Ib-Ib in (c). A cross-sectional view, (c) is a front view of the dust collector.

  As shown in FIG. 1, a body 1 of a dust collector is formed in a substantially rectangular rectangle in a cross-sectional view, is formed in a substantially bottomed cylindrical shape in a front view, and a lower portion thereof has a substantially quadrangular pyramid shape. It is formed as a hopper 500. Further, inside the fuselage 1, a filter in which a duct chamber 100 in which an inlet 110 for introducing dust-containing air DA is formed on the upper side and a number of filters 210 that filter the dust-containing air DA into clean air CA are disposed. The chamber 200 is adjacent to the side in a state where two punching metal rectifying plates 300 (a filter chamber side rectifying plate 300A and a duct chamber side rectifying plate 300B) having a large number of through holes 301 are interposed. Configured.

  Based on the above configuration, the dust collector according to the present embodiment introduces the dust-containing air DA into the duct chamber 100 as a downward flow from the inlet 110 to the lower portion of the duct chamber 100 and into the duct chamber 100. Dust air DA flows mainly from the duct chamber 100 to the filter chamber 200 through the through hole 301 formed in the rectifying plate 300, is filtered by the filter 210, and the clean air CA obtained by the filtration is contained in the filter 210. As the upward flow from the lower part to the upper part flows into the clean chamber 400 provided in the upper part of the filter chamber 200 and is discharged from the discharge port 410 provided in the clean chamber 400, the filtration process is executed.

  Below, a structure is demonstrated in order of the duct chamber 100, the baffle plate 300, and the filter chamber 200 in order of the flow of dust-containing air DA.

[Duct room]
As shown in FIG. 1A, the duct chamber 100 is formed by partitioning the inside of the body 1 of the dust collector by a rectifying plate 300 as a side wall adjacent to the filter chamber 200 side, and is vertically long. It is formed as a bottomed cylindrical space. In addition, an inlet 110 for introducing dust-containing air DA into the duct chamber 100 is disposed on the upper side of the duct chamber 100.

  Moreover, the lower part of the duct chamber 100 is provided with an inclined surface portion 101 (tapered portion) that tapers toward the filter chamber 200 as it goes from the upper portion to the lower portion (see FIG. 1A). The duct chamber 100 and the filter chamber 200 are connected so that the dust-containing air DA can flow from the tapered portion 102 of the 101 to the filter chamber 200.

  As described above, the duct chamber 100 includes the slope-shaped portion 101 in the lower portion, thereby generating an air flow of the dust-containing air DA that flows along the slope-shaped portion 101. And the dust of the bottom part of the duct chamber 100 is discharged to the filter chamber 200 (hopper 500) through the taper part 102 with the said air current, and it prevents that dust accumulates on the bottom part of the duct chamber 100.

〔rectifier〕
As shown in FIG. 1A, in this embodiment, as the current plate 300, two flat plate current plate made of punching metal shown in FIGS. 2A and 2B (filter chamber side current plate 300A). The duct chamber side rectifying plate 300B) is arranged in parallel with a gap between the duct chamber 100 and the filter chamber 200. The rectifying plate 300 is formed in a plate shape, and is configured in a vertically long rectangular shape in the vertical direction. Further, the rectifying plate 300 is disposed so that the plane portion thereof is along the flow direction of the dust-containing air DA that flows in the duct chamber 100 in the direction from the upper part to the lower part. 2A is a front view of the filter chamber side rectifying plate 300A, and FIG. 2B is a front view of the duct chamber side rectifying plate 300B. 3 (a) is an enlarged front view of the rectifying plate 300 configured by arranging two rectifying plates 300A and 300B in parallel, as viewed from the duct chamber side rectifying plate 300B side, and FIG. It is a longitudinal cross-sectional view along the IIIb-IIIb arrow line of (a).

  A large number of circular through holes 301A are formed in the filter chamber side rectifying plate 300A at predetermined pitches described later in the horizontal direction and the vertical direction of the rectifying plate. Similarly, the duct chamber side rectifying plate 300B has a circular shape. A large number of through holes 301B are formed at a predetermined pitch, which will be described later, in the horizontal direction and the vertical direction of the current plate. Dust-containing air DA is formed so as to be able to flow from the duct chamber 100 to the filter chamber 200 through the through holes 301A and 301B. Of the large number of through holes 301A and 301B, the opening area of each of the lower through holes 301Ab and 301Bb formed in the lower part of the filter chamber side rectifying plate 300A and the duct chamber side rectifying plate 300B is the filter chamber side rectifying plate 300A, It is formed smaller than the opening area of each upper through hole 301Aa, 301Ba formed in the upper part of the duct chamber side rectifying plate 300B.

  For example, in FIGS. 2A and 2B, the upper through holes 301Aa and 301Ba formed in the upper 41 rows are formed in a circular shape with a hole diameter of 70 mm, and the lower through holes 301Ab formed in the lower 20 rows. 301Bb is formed in a circular shape with a hole diameter of 60 mm.

  Thus, by forming the opening area of each lower through-hole 301Ab, 301Bb smaller than the opening area of each upper through-hole 301Aa, 301Ba, in each lower through-hole 301Ab, 301Bb, in each upper through-hole 301Aa, 301Ba In comparison, the rate of suppression of the flow rate of the dust-containing air DA flowing through the filter chamber 200 can be increased.

  As shown in FIG. 1 (a), the lower through holes 301Ab and 301Bb having a small opening area face the lower part of the duct chamber 100 from the same height as the inclined surface portion 101 of the duct chamber 100 in the vertical direction. It is preferable to form them. This is because the dust-containing air DA introduced in the direction along the duct chamber side rectifying plate 300B from the upper portion to the lower portion in the duct chamber 100 from the introduction port 110 provided in the upper portion of the duct chamber 100 is particularly the duct chamber. The collision direction can be smoothly changed in the direction of the filter chamber 200 by colliding with the slope-shaped portion 101 of 100. Accordingly, the flow velocity component of the dust-containing air DA in the direction of the filter chamber 200 increases in the lower part of the duct chamber 100 particularly from the same height as the slope-shaped portion 101. This is because disposing the lower through holes 301Ab and 301Bb having a small opening area at a position corresponding to this is particularly effective in suppressing the flow rate of the dust-containing air DA in the direction of the filter chamber 200. .

Further, the plurality of through holes 301A in the horizontal direction of the filter chamber side rectifying plate 300A include a central portion pitch (center pitch) 302A formed at a constant pitch and other portion pitches 303A formed at a constant pitch. The pitch (center pitch) 302A at the center is wider than the pitch 303A at the other part. As a result, a non-hole band 306A that does not have the through-hole 301A is formed along the vertical direction between adjacent ones of the through-holes 301A arranged at the central pitch 302A, and other than the non-hole band 306A. A perforated band 307A in which through holes 301A are arranged at a pitch 303A is formed in the other part along the vertical direction. Similarly, the plurality of through holes 301B in the horizontal direction of the duct chamber side rectifying plate 300B have a central pitch 302B formed at a constant pitch (center pitch) 302B and a pitch 303B of another portion formed at a constant pitch. And the central portion pitch (center pitch) 302B is wider than the other portion pitch 303B. As a result, a non-hole band 306B that does not have the through-hole 301B is formed along the vertical direction between adjacent through-holes 301B arranged at a pitch 302B in the center, and other than the non-hole band 306B. In the other part, a perforated band 307B in which the through holes 301B are arranged at a pitch 303B is formed along the vertical direction. Note that the pitch refers to the distance between the centers in the horizontal direction or the vertical direction of adjacent through holes 301A or adjacent through holes 301B.
For example, in FIGS. 2A and 2B, the center pitches 302A and 302B are set to 250 mm and 150 mm, and the other pitches 303A and 303B are set to 100 mm. It is formed with a pitch.
The vertical pitches 304A and 304B are constant at 100 mm regardless of the positions of the upper and lower portions of the rectifying plates 300A and 300B and the horizontal direction.
The non-hole part bands 306A and 306B and the perforated part bands 307A and 307B formed as described above are formed in a long band shape in the vertical direction of the filter chamber side rectifying plate 300A and the duct chamber side rectifying plate 300B, respectively.

  In this way, by forming the center pitch 302A, 302B in the center portion in the horizontal direction wider than the pitches 303A, 303B in the other portions, the non-hole band 306A, 306B without the through holes 301A, 301B can be moved up and down. The non-porous band 306A, 306B is formed along the direction to restrict the flow of the dust-containing air DA in the center of the filter chamber side rectifying plate 300A and the duct chamber side rectifying plate 300B, and the through holes 301A, 301B With respect to the flow speed of the dust-containing air DA that flows, the maximum speed of the horizontal flow speed can be suppressed and uniformized.

  Further, the center pitch 302A of the filter chamber side rectifying plate 300A is configured to be wider than the center pitch 302B of the duct chamber side rectifying plate 300B, and the non-porous part band 306A is configured to be wider than the non-porous part band 306B. Has been. As a result, with respect to the flow of the dust-containing air DA flowing from the duct chamber 100 side to the filter chamber 200 side, the flow in the central portion in the horizontal direction in the filter chamber 200 where the flow rate is the fastest is more reliably limited. can do. Therefore, it is possible to suppress the maximum velocity of the airflow rate of the dust-containing air DA from the duct chamber 100 side to the filter chamber 200 side.

Next, the arrangement relationship when the two filter chamber side rectifying plates 300A and the duct chamber side rectifying plate 300B are arranged in parallel will be described.
As shown in FIG. 3A, when the two filter chamber side rectifying plates 300A and the duct chamber side rectifying plate 300B are arranged in parallel, the filter chamber side rectifying plate 300A and the duct chamber side rectifying plate 300B are viewed from the front. Thus, the plurality of through holes 301A formed in the filter chamber side rectifying plate 300A are arranged so as not to overlap with the plurality of through holes 301B formed in the duct chamber side rectifying plate 300B.

  As shown in FIG. 3B, when the dust-containing air DA flows from the duct chamber 100 to the filter chamber 200, the through-hole 301A of the filter chamber-side rectifying plate 300A and the through-hole 301B of the duct chamber-side rectifying plate 300B. Therefore, the dust-containing air DA cannot pass through the through hole 301A and the through hole 301B only by going straight in the front view direction of the filter chamber side rectifying plate 300A and the duct chamber side rectifying plate 300B. That is, when the dust-containing air DA flows from the duct chamber 100 to the filter chamber 200, collision with the filter chamber side rectifying plate 300A and detour (bending) along the filter chamber side rectifying plate 300A are likely to occur. Therefore, in the filter chamber side rectifying plate 300A and the duct chamber side rectifying plate 300B, it is possible to further reduce the flow speed and improve the dust capture rate. Thereby, the wear and breakage of the filter 210 in the filter chamber 200 can be suppressed, and the service life of the equipment can be improved.

  2A and 2B, the lengths of the metal portions 305A and 305B having no through holes at the bottom of the filter chamber side rectifying plate 300A and the duct chamber side rectifying plate 300B, and the filter chamber side rectifying By adjusting the shape and size of the guide 310 extending and connected downward along the inner wall of the tapered portion 102 from the lower end of the plate 300A, the dust collector body 1 (tapered portion 102) and the duct chamber side rectifying plate 300B are adjusted. The shape and size of the gap formed between the lower end of the guide and the lower end of the guide 310 can be adjusted. Thereby, the flow speed of the dust-containing air DA flowing through the hopper 500 connected to the lower part of the filter chamber 200 can be suppressed.

[Filter room]
As shown in FIG. 1A, the filter chamber 200 is formed by partitioning the inside of the body 1 of the dust collector by a rectifying plate 300 as a side wall adjacent to the duct chamber 100 side, and is vertically long. It is formed as a bottomed cylindrical space. The filter chamber 200 shares the duct chamber 100 and the body 1 of the dust collector. The duct chamber 100 and the filter chamber 200 are mainly formed so that the dust-containing air DA can flow through the through holes 301A and 301B formed in the filter chamber side rectifying plate 300A and the duct chamber side rectifying plate 300B. ing. Further, the tapered portion 102 of the slope-shaped portion 101 of the duct chamber 100, the guide 310 extending and connected downward along the inner wall of the tapered portion 102 from the lower end of the filter chamber side rectifying plate 300A, and the duct chamber side rectifying plate 300B. It is formed so as to be able to flow through a gap with the lower end of the plate.

  As shown in FIGS. 1A and 1B, a large number of filters 210 for filtering the dust-containing air DA are suspended inside the filter chamber 200 from the upper portion toward the lower portion in the filter chamber 200. Has been. The filter 210 collects dust on a support (not shown) formed in the shape of a cylindrical basket through which air can flow, which is obtained by welding a straight bar-like support bar and a circular support ring in plan view. The filter cloth (not shown) provided with the predetermined dust collection capability according to the purpose is covered.

  Further, as shown in FIG. 1A, the filter 210 passes through a hanging hole 202 opened in the ceiling portion 201 of the filter chamber 200 and passes from the ceiling portion 201 to the inside of the filter chamber 200 in the vertical direction. Longer than the upper and lower ends of the side rectifying plate 300A and shorter than the lower end of the guide 310, a large number of filter cloths are covered and suspended. Thereby, the dust-containing air DA guided by the guide 310 from the tapered portion 102 of the slope-shaped portion 101 and flowing to the hopper 500 of the filter chamber 200 is not directly blown to the lower end of the filter 210. Yes.

Further, as shown in FIG. 1B, the filter 210 has a pitch (for example, 330 mm) at the center of the filter chamber 200 in the horizontal direction when viewed from the front of the rectifying plate 300, and a pitch at the other part (for example, 180 mm). It is arranged in a state of being formed wider.
That is, in the center of the filter chamber 200 in the horizontal direction as viewed from the front of the rectifying plate 300 in the filter chamber 200, a filter non-placement portion 220 where the filter 210 is not placed is formed. In this portion, a filter arrangement portion 230 in which the filters 210 are arranged at a pitch of the other portion is formed. In this way, by forming a region where the filter is not disposed in the central portion (a belt-shaped region along the vertical direction in the front view of the rectifying plate 300) and forming the central portion more easily than other portions, The flow of the air DA can be promoted to the back side of the filter chamber 200.
It should be noted that the non-hole band 306A of the filter chamber side rectifying plate 300A and the region in which the filter 210 in the filter chamber is not disposed (the filter non-installed portion 220) are substantially the same in the vertical direction and the horizontal direction when viewed from the front of the rectifying plate 300. They are arranged so as to overlap to the same extent.

  A clean chamber 400 is formed in the upper portion of the filter chamber 200 with the ceiling 201 as a partition wall. In addition, a discharge port 410 for discharging clean air CA obtained by filtration to the outside of the body 1 of the dust collector is formed on the side surface of the clean chamber 400. Furthermore, the upper part of the filter chamber 200 (clean chamber 400) is closed. In addition, a hopper 500 is connected to the bottom of the filter chamber 200 so that dust removed from the filter 210 can be accumulated. In addition, although not shown in figure, the discharge valve which can discharge | emit accumulated dust is arrange | positioned under the hopper 500.

[Filtering treatment]
Next, the filtration process by the operation of the dust collector configured as described above will be described. First, the dust-containing air DA to be filtered is introduced in the direction along the duct chamber side rectifying plate 300B from the upper portion to the lower portion in the duct chamber 100 through the introduction port 110.

The dust-containing air DA introduced into the duct chamber 100 from the introduction port 110 has a large velocity component from the upper part to the lower part in the duct chamber 100, and most of the dust-containing air DA is directed toward the lower part of the duct chamber 100. Although a part flows, a part receives a suction action from the adjacent filter chamber 200 and flows from the duct chamber 100 toward the filter chamber 200. The airflow from the duct chamber 100 toward the filter chamber 200 passes through the upper through holes 301Ba and 301Aa formed in the upper part of the duct chamber side rectifying plate 300B and the filter chamber side rectifying plate 300A forming the side wall of the duct chamber 100. , Flows into the filter chamber 200. At this time, among the dust-containing air DA flowing through the duct chamber 100 from the upper part to the lower part, the flow of the dust-containing air DA at the center in the horizontal direction of the filter chamber-side rectifying plate 300A and the duct chamber-side rectifying plate 300B. Although the speed is maximized, the non-porous part band 306A and the non-porous part band 306B are formed in the central part in the horizontal direction of the filter chamber side rectifying plate 300A and the duct chamber side rectifying plate 300B. The flow of the dust-containing air DA from the chamber 100 to the filter chamber 200 is restricted.
Moreover, since each upper through-hole 301Ba, 301Aa has a larger opening area than each lower through-hole 301Bb, 301Ab formed in the lower part of the rectifying plates 300B, 300A, the flow velocity can be relatively suppressed. Instead, it flows toward the filter chamber 200.

On the other hand, most of the airflow of the dust-containing air DA introduced into the duct chamber 100 from the inlet 110 flows toward the lower portion of the duct chamber 100 and collides with the slope-shaped portion 101 formed in the lower portion of the duct chamber 100. Since the flow direction can be smoothly changed in the direction of the filter chamber 200, the flow speed of the dust-containing air DA that flows laterally from the duct chamber 100 toward the filter chamber 200 is lower than that of the duct chamber 100. The maximum speed is achieved at the part corresponding to.
Then, the air flow of the dust-containing air DA that has flowed laterally toward the filter chamber 200 in the lower portion of the duct chamber 100 that has reached the maximum speed is rectified on the duct chamber side forming the side wall of the lower portion of the duct chamber 100. The flow rate is suppressed by the lower through holes 301Bb and 301Ab having a small opening area formed in the lower part of the plate 300B and the filter chamber side rectifying plate 300A, and then flow into the filter chamber 200.

  As described above, according to the dust collector of the present embodiment, the air flow of the dust-containing air DA in the portion corresponding to the lower portion of the duct chamber 100 that generates the maximum speed, which causes wear and damage to the filter, is circulated. After suppressing the speed, the air flows from the duct chamber 100 to the filter chamber 200 through the through holes 301A and 301B of the filter chamber side rectifying plate 300A and the duct chamber side rectifying plate 300B. Therefore, the maximum speed of the flow speed of the dust-containing air DA flowing through the filter chamber 200 can be suppressed, so that the filter 210 can be prevented from being worn and damaged and the filter life can be extended.

Next, the dust-containing air DA passed through the filter chamber 200 is filtered by the filter 210 constituted by a plurality of cylindrical filter cloths suspended from the upper part toward the lower part inside the filter chamber 200. Is done.
That is, the dust-containing air DA in the filter chamber 200 is sucked into the filter 210 by the suction action of a blower (not shown) disposed on the downstream side of the filter chamber 200. The dust-containing air DA is filtered by passing through a filter cloth when sucked into the filter 210, and becomes clean air CA in the filter 210. The clean air CA in the filter 210 obtained by the filtration flows upward in the filter 210 formed in a cylindrical shape, is discharged from the hanging hole 202 to the clean chamber 400, and is discharged to the clean chamber 400 through the discharge port 410. Discharged from inside.

By the above filtration process, the dust-containing air DA introduced into the dust collector from the inlet 110 becomes clean air CA obtained by filtration and is discharged out of the dust collector from the outlet 410.
Therefore, the flow rate of the dusty air DA flowing into the filter chamber 200 while increasing the flow rate of the dusty air DA introduced into the duct chamber 100 and increasing the amount of filtration per unit time of the dust collector. The maximum speed (including the maximum speed in the horizontal direction) can be suppressed to prevent wear and breakage of the filter 210 and extend the filter life.

[Disbursement processing]
In addition, the dust adhering to the filter cloth of the filter 210 by the above filtration process is at an appropriate timing by a compressed air ejecting means (not shown) capable of ejecting compressed air from the upper part of each filter 210 in the clean chamber 400. By performing a removal process for ejecting compressed air from the clean chamber 400 side into the filter 210, it is removed from the filter 210 and deposited on the hopper 500 at the bottom of the filter chamber 200. Such a removal process allows the filter 210 to be used repeatedly.

[Second Embodiment]
The dust collector which concerns on 2nd Embodiment comprises the rectifying plate 300 comprised by the two rectifying plates 300A and 300B in any 1 sheet in 1st Embodiment.

  According to the present embodiment, compared with the first embodiment, although the suppression force of the flow rate of the dust-containing air DA from the duct chamber 100 to the filter chamber 200 is reduced, the horizontal direction of the rectifying plate 300 in the duct chamber 100 is reduced. And the maximum speed of the flow rate that flows from the lower part of the duct chamber 100 to the filter chamber 200 via the lower through holes 301Ab can be suppressed to some extent. In addition, maintenance such as the arrangement of the current plate 300 is facilitated, and the pressure loss of the dust-containing air DA when flowing from the duct chamber 100 to the filter chamber 200 can be reduced. Therefore, in the case where the flow rate (maximum speed) of the dust-containing air DA flowing from the duct chamber 100 to the filter chamber 200 can be reduced to an allowable range according to the present embodiment, maintainability is achieved by adopting the present embodiment. Can be improved and pressure loss can be reduced.

[Third Embodiment]
In the dust collector according to the third embodiment, instead of the filter chamber side rectifying plate 300A according to the second embodiment, a rectifying plate (through illustration) having through holes formed in the upper and lower portions of the rectifying plate 300 with the same hole diameter is illustrated. Not). According to the present embodiment, the suppression force of the maximum flow rate of the dust-containing air DA flowing from the lower part of the duct chamber 100 to the filter chamber 200 is reduced, but the rectifying plate 300 has a simple structure. The dust collector 1 can be configured at a low cost.

[Another embodiment]
(1) In the above embodiment, the shape of the through hole formed in the current plate is circular, but the shape of the through hole may be other shapes such as a square, a rectangle, and an ellipse, for example. Good.

(2) In the above embodiment, the upper and lower through-holes of the rectifying plate are illustrated as being circular with hole diameters of 70 mm and 60 mm, and two different opening areas are illustrated. If the area is smaller than the opening area of each upper through hole, the specific numerical value of the hole diameter can be appropriately changed. Further, each through hole may be formed by changing the opening area to three or more kinds so that the opening area decreases from the upper part to the lower part of the current plate.

(3) In the above embodiment, the through holes formed in each of the two rectifying plates are arranged in parallel so as not to overlap with each other when viewed from the front of the rectifying plate. In order to change the dust capture rate, the degree of pressure loss, and the degree of suppression of the flow rate, the through holes should be partially or entirely overlapped in plan view of the current plate. Two current plates may be arranged in parallel. Similarly, instead of two sheets, three or more rectifying plates may be arranged in parallel.

(4) In the above embodiment, the center pitch (each pitch is constant) is formed wider than the other portion pitch (each pitch is constant), and the non-perforated zone and the perforated zone are formed on the current plate. However, the perforated zone may be formed without making the pitch of the through holes formed in the perforated zone (the pitch of the other part) constant.
In addition, the horizontal pitch of the through holes formed in the rectifying plate is exemplified as two types, such as the center pitch and the pitch of other portions as shown in FIG. 2, but there are three or more horizontal pitches. As a result, the wind speed in the horizontal direction may be made more uniform.
Furthermore, although the non-perforated zone and the perforated zone are formed on each of the two rectifying plates, the non-perforated zone may be configured only on one of them.

(5) In the above embodiment, the vertical pitch of the through holes formed in the current plate is illustrated as being constant regardless of the upper and lower portions of the current plate as shown in FIG. The performance of suppressing the flow rate of the dust-containing air may be adjusted by forming the direction pitch larger in the lower part than in the upper part.

(6) In the above embodiment, the filter has a cylindrical shape. However, the shape of the filter is not limited to a cylindrical shape, and may be, for example, a polygonal cylindrical shape or an elliptical shape whose cross section is a triangle or more. It may be configured. Further, it may be a cross-sectional shape in which the inner angle of one or more corners is 180 degrees or more, for example, a star shape or a shape having a large number of pleats.

(7) In the above embodiment, the filter is illustrated in which the filter cloth is laid longer than the upper and lower ends of the filter chamber side rectifying plate in the vertical direction, but the length of the filter cloth is not limited to this, For example, the filter may be shorter than at least one of the upper end and the lower end of the filter chamber side rectifying plate.

(8) In the above embodiment, the configuration in which the filter is suspended from the upper part to the lower part in the filter chamber is illustrated. However, the filter is not limited to being suspended, and the filter is not limited to the filter chamber. Any configuration can be used. For example, a configuration in which the filter is attached to an attachment plate that can be fixed to the side wall of the filter chamber and disposed in the filter chamber may be employed.

(9) In the above embodiment, the filter disposed in the filter chamber is exemplified by a configuration in which the central pitch in the horizontal direction is formed wider than the pitch of the other portion in front view of the rectifying plate of the filter chamber. However, the structure which forms the pitch of the center part of a horizontal direction with the same width | variety as the pitch of another part by the front view of the baffle plate of a filter chamber may be sufficient. In other words, the filter may be disposed without forming a region where the filter is not disposed in the filter chamber (no filter disposed portion). According to this configuration, since the volume ratio of the filter disposed in the filter chamber increases, the amount of dust collection per unit volume of the filter chamber can be improved.

  INDUSTRIAL APPLICABILITY The present invention is useful as a dust collector that suppresses the maximum speed of the dust-containing air flow rate in the central portion in the horizontal direction of the current plate in front view of the current plate and makes the horizontal flow rate uniform. Can be used.

100 Duct chamber 110 Inlet 200 Filter chamber 210 Filter 220 No-filter portion
230 Filter arrangement part 300 Current plate 300A Filter room side current plate (rectifier plate)
300B Duct chamber side current plate (rectifier plate)
301 Through-holes 302A, 302B, 302C Center pitch (pitch at the center)
303A, 303B, 303C Pitch (Pitch of other part)
306A, 306B Non-porous zone
307A, 307B Perforated zone 410 Exhaust port CA Clean air DA Dust-containing air

Claims (4)

A flat plate in which a plurality of through-holes are formed, with a bottomed upper and lower cylindrical duct chamber having an inlet for introducing dust-containing air, and a filter chamber in which a filter for filtering the dust-containing air is disposed. Is arranged adjacent to the side with a rectifying plate interposed,
In the dust collector for filtering the dust-containing air flowing from the duct chamber through the plurality of through holes to the filter chamber by the filter, and discharging the clean air obtained by the filtration from the filter chamber,
The introduction port is disposed on the upper side of the duct chamber, and the dust-containing air is introduced in a direction along the rectifying plate from an upper portion to a lower portion in the duct chamber, and through the plurality of through holes. In the configuration that flows sideways from the duct chamber toward the filter chamber,
In the front view of the rectifying plate, the central portion in the horizontal direction in the plane portion of the rectifying plate, imperforate portions band without the plurality of through holes are formed along the vertical direction Rutotomoni, of the current plate On both sides of the non-perforated zone in the plane portion, the perforated zone having the plurality of through holes is formed along the vertical direction,
In front view of the rectifying plate, at least a part of the filter disposing portion in which the filter is disposed in the filter chamber is disposed at a position overlapping with the perforated band formed in the flat portion of the rectifying plate. has been that the dust collecting device. The filter is composed of a plurality of tubular filter cloths, and is suspended from the upper part of the filter chamber toward the lower part,
2. The dust collector according to claim 1, further comprising: a filter non-arrangement portion in which the plurality of cylindrical filter cloths are not arranged in a central portion in the horizontal direction of the filter chamber in the filter chamber in a front view of the current plate. The current plate is composed of a plurality of current plates arranged in parallel at intervals,
The non-porous part band formed on the rectifying plate on the side close to the filter chamber is formed wider than the non-porous part band formed on the rectifying plate on the side close to the duct chamber. The dust collector described.   The plurality of through holes formed in one of the adjacent rectifying plates is disposed at a position not overlapping with the plurality of through holes formed in the other of the adjacent rectifying plates in a front view of the plurality of rectifying plates. The dust collector according to claim 3.

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