JP7599706B2 - Dust collector - Google Patents

Description

The present invention relates to a dust collection device.

Various types of dust collectors are used in metal processing factories to prevent health damage to workers.

For example, a dust collector for grinding work used during grinding work (including cutting and polishing) has a metal suction opening and a fire extinguishing mechanism, and can effectively prevent the filter and the like from burning even when grinding dust containing sparks is sucked in and captured (Patent Document 1).

In addition, a welding dust collector used during welding work has a duct arm that can move the hood to the vicinity of the source of welding fumes (welding work position) and hold it in that position (Patent Document 2).

Japanese Unexamined Patent Publication No. 60-22917 Publication No. 3212508

Previously, for example, if welding and grinding work were planned, the two types of dust collectors mentioned above were prepared separately.

The present invention aims to provide a dust collection device that can collect dust during grinding and welding operations with a single unit.

The gist of the present invention will be explained with reference to the attached drawings.

A dust collecting device comprising: a dust collector body 1 having an intake and exhaust mechanism; a front opening 2 provided on the front of the dust collector body 1 and capable of sucking in dust containing fire powder; and a fire extinguishing mechanism for extinguishing the fire powder sucked in from the front opening 2,
a tube body 4 for local suction, the base end of which is connected to the dust collector body 1, the tip end of which is provided with a tip opening 3 having an opening area smaller than that of the front opening 2, and the position of the tip opening 3 being freely adjustable and maintainable within a predetermined range;
A first closing mechanism 6 for closing the tube 4;
A second closing mechanism 7 that closes the front opening 2;
The dust collecting device is characterized by having a common filter mechanism 5 for collecting dust sucked through the front opening 2 and the tip opening 3.

The dust collecting device according to claim 1 is characterized in that a switching mechanism is provided for switching the intake and exhaust air volume of the intake and exhaust mechanism between a case in which the tip opening 3 of the tubular body 4 is closed and suction is performed from the front opening 2, and a case in which the front opening 2 is closed and suction is performed from the tip opening 3 of the tubular body 4.

In addition, the dust collecting device described in claim 2 is characterized in that when suction is performed from the tip opening 3 of the tubular body 4, the air volume of the intake and exhaust mechanism is smaller than when suction is performed from the front opening 2.

The present invention also relates to a dust collecting device as described in any one of claims 2 and 3, characterized in that the dust collecting device is configured so that the filtered air speed when passing through the filter mechanism 5 when suction is performed from the tip opening 3 of the tubular body 4 is 0.4 to 1.0 m/min.

The present invention also relates to a dust collecting device as described in any one of claims 2 to 4 , characterized in that the dust collecting device is configured so that the filtered air speed when passing through the filter mechanism 5 when suction is performed from the front opening 2 is 1.0 to 2.0 m/min.

Moreover, in the dust collecting device described in any one of claims 1 to 5 , the fire extinguishing mechanism relates to a dust collecting device characterized in that it includes a wall portion 8 arranged in parallel in a direction intersecting the flow direction of the dust sucked from the front opening 2, for colliding the dust and cooling the sparks .

The dust collector according to any one of claims 1 to 6 is characterized in that it has a pair of suction guide plates 10 on both the left and right sides of the front opening 2, and the suction guide plates 10 are rotatable between a stored state along the side of the dust collector body 1 and a protruding state protruding forward of the dust collector body 1.

The present invention is configured as described above, resulting in a dust collection device that can effectively collect dust during grinding and welding operations with a single unit.

FIG. 1 is a schematic explanatory perspective view of the present embodiment. FIG. 2 is a schematic cross-sectional view of the present embodiment. FIG. 1 is a schematic explanatory vertical sectional view of the present embodiment. FIG. 1 is a schematic explanatory vertical sectional view of the present embodiment. FIG. 2 is an enlarged schematic cross-sectional view of a wall portion 8 of the present embodiment. FIG. 11 is an enlarged schematic cross-sectional view of a wall portion 8 of another example.

The preferred embodiment of the present invention will be briefly explained below, showing the operation of the invention based on the drawings.

For example, when grinding work is performed before welding work, grinding work is performed in front of the front opening 2 with a grinding machine such as a grinder so that sparks ( dust including sparks) fly toward the front opening 2, and after the grinding work, the tip opening 3 of the local suction tube 4 is fixed in an appropriate position and welding work is performed.

During this process, grinding dust generated during grinding work is sucked in through the front opening 2, and welding fumes generated during welding work are sucked in through the tip opening 3.

Therefore, there is no need to use separate dust collectors for grinding and welding work, and one dust collector can effectively collect both grinding dust and welding fumes.

Specific examples of the present invention will be described with reference to the drawings.

This embodiment is a dust collecting device comprising a dust collector main body 1 having an intake and exhaust mechanism, a front opening 2 provided on the front of the dust collector main body 1 and capable of sucking in dust including sparks, and a fire extinguishing mechanism for extinguishing the sparks sucked in from the front opening 2.

As shown in Figs. 1 and 2, this embodiment has a tube body 4 for local suction, the base end of which is connected to the dust collector body 1, a tip opening 3 having a smaller opening area than the front opening 2 at the tip end, and the position of the tip opening 3 can be freely adjusted and maintained within a predetermined range, and a common filter mechanism 5 for collecting dust sucked through the front opening 2 and the tip opening 3.

Each part will be explained in detail.

The dust collector body 1 is generally in the shape of a rectangular parallelepiped box, with a rectangular front opening 2 provided in the center of the front surface and an exhaust port 27 provided on the top surface. A step-down surface 11 is provided on the top surface, and the base end of the tube 4 is connected to this step-down surface 11 so that it can rotate horizontally and communicate with the inside of the dust collector body 1. Specifically, the step-down surface 11 is a horizontal surface that continues to intersect (orthogonally) with the upper front surface of the front opening 2, which is a vertical surface, and an opening is provided on this step-down surface 11 to which the base end of the tube 4 is connected.

The tube body 4 is a flexible duct with a hood 12 at its tip and a built-in flexible arm structure, and is configured so that the vertical position of the hood 12 can be freely adjusted and the position can be maintained within the movable range.

The tip of the tube 4 has a first blocking mechanism 6 that blocks the tip opening 3. The first blocking mechanism 6 is an air volume adjustment damper. Specifically, a blocking plate 13 that roughly matches the inner diameter of the tube 4 is provided on the rotating shaft, and the flow path of the tube 4 can be opened and closed by operating a handle 14 connected to the rotating shaft. The first blocking mechanism 6 may be provided in the middle or base end, but is preferably provided at the tip (near the hood 12) from the viewpoint of operability.

By attaching the tube body 4 to the top side of the dust collector body 1, it is possible to save space compared to attaching it to the side, and the tube body 4 is easy to handle, resulting in a user-friendly configuration.

The dust collector body 1 is also provided with a second blocking mechanism 7 that blocks the front opening 2. The second blocking mechanism 7 is composed of rails 15 provided along the upper and lower edges of the front opening 2, and a lid 16 whose upper and lower ends engage with the rails 15 (a so-called Kendon-type blocking lid). A pair of storage rails 17 are provided on the lower side of the front opening 2, and when the front opening 2 is used (when the lid is not used), the lid 16 can be stored by engaging its upper and lower ends with the storage rails 17, respectively. Note that the Kendon type is not limited to this, and for example, a vertical slide rail extending along the left and right edges of the front opening 2 to the lower part of the front of the dust collector body 1 may be provided, and the lid 16 may be provided so as to be able to slide up and down along the slide rail, and a lock mechanism may be provided to hold the position of the lid 16 in the upper position (when the front opening 2 is blocked) or lower position (when stored), so that the position of the lid 16 can be switched between the upper and lower positions, making it a vertically sliding blocking lid.

That is, when suction is performed from the front opening 2, the tip opening 3 is closed by the first closing mechanism 6, and when suction is performed from the tip opening 3, the front opening 2 is closed by the second closing mechanism 7. The grinding dust sucked from the front opening 2 and the welding fumes sucked from the tip opening 3 both pass through the inside of the dust collector body 1 and are discharged via the filter mechanism 5 and the intake and exhaust mechanism.

Figure 3 shows an example in which the tip opening 3 is closed by the first closing mechanism 6 when grinding the workpiece W1 using a grinder A on a workbench 25 installed in front of the dust collector body 1, and Figure 4 shows an example in which the front opening 2 is closed by the second closing mechanism 7 when welding the workpiece W2 using a welding machine B on the workbench 25.

An intake and exhaust mechanism (intake and exhaust fan 9) is provided on the top of the dust collector body 1. The intake and exhaust fan 9 is disposed in the first partition wall 18 so as to be in communication with the opening of the first partition wall 18, and performs intake and exhaust.

In addition, in this embodiment, a switching mechanism is provided that switches the intake and exhaust air volume of the intake and exhaust mechanism between a case where the tip opening 3 of the tube body 4 is closed and suction is performed from the front opening 2, and a case where the front opening 2 is closed and suction is performed from the tip opening 3 of the tube body 4.

In this embodiment, the switching mechanism is configured to switch the intake and exhaust air volume (processing air volume) by controlling the rotation speed of the intake and exhaust fan 9 with an inverter (switching is possible by operating a switch). Note that switching is not limited to being by an inverter, and it may also be configured to adjust the switching by, for example, an air volume adjustment damper provided in the flow path.

Specifically, when suction is performed from the tip opening 3 of the tube body 4, the intake and exhaust mechanism is controlled so that the air volume of the intake and exhaust mechanism is smaller (e.g., about half) than when suction is performed from the front opening 2.

A second partition wall 19 is provided below the first partition wall 18, with a filter mechanism 5 attached vertically to its underside. Clean air that passes through the filter mechanism 5 and the opening of the second partition wall 19 is exhausted via the intake and exhaust fan 9. Multiple filter mechanisms 5 are arranged horizontally in parallel on the rear side of the wall section 8, which will be described later.

In this embodiment, the filtered air speed when passing through the filter mechanism 5 when suction is performed from the tip opening 3 of the tube body 4 is set to 0.4 to 1.0 (preferably 0.5 to 0.8) m/min, and the filtered air speed when passing through the filter mechanism 5 when suction is performed from the front opening 2 is set to 1.0 to 2.0 m/min. These filtered air speeds take into consideration the particle size (ease of clogging) and processing air volume of the welding fumes sucked in from the tip opening 3 and the grinding dust sucked in from the front opening 2.

Specifically, for example, if the opening of the front opening 2 is 1 m wide x 0.5 m high, an intake/exhaust air volume of about 30 ^{m3/min is required to obtain the above-mentioned filtered air velocity (as well as a wind speed of 1 m/s at the opening surface). Also, for example, if the opening of the tip opening 3 is 0.17 m in diameter, an intake/exhaust air volume of about 14 m3 /} min is required to obtain the above-mentioned filtered air velocity (as well as a wind speed of 10 m/s at the opening surface).

The filter mechanism 5 is composed of cylindrical cloth filters (four are provided in this embodiment). Specifically, it is a so-called bag filter made of polyester with a surface treatment (fluororesin lamination). The filter mechanism 5 is provided with a pulse jet mechanism, and is configured to be able to brush off dust adhering to the filter surface.

The filter area of the filter mechanism 5 is set in consideration of the appropriate range of the filtration air speed, and the air volume when suctioning from the front opening 2 and the air volume when suctioning from the tip opening 3. That is, in the case of a configuration in which the air volume is switched to about half that when suctioning from the front opening 2 when suctioning from the tip opening 3 as described above, in this embodiment, a filter area of about 18 ^m2 satisfies the above filtration air speed.

The fire extinguishing mechanism includes a wall portion 8 arranged in a direction intersecting the flow direction of the dust sucked from the front opening 2, and for colliding the dust with the wall portion 8 to cool the powder .

In this embodiment, the wall portion 8 has a length in the vertical direction, and as shown in Figures 2 and 5, is composed of a V-shaped plate member 8a provided on the inlet side and having a wall surface inclined with respect to the dust flow direction, and a 3-shaped plate member 8b provided on the filter mechanism 5 side of the V-shaped plate member 8a and having an arc-shaped curved wall surface. A plurality of V-shaped plate members 8a and 3-shaped plate members 8b are arranged side by side at a predetermined interval in the horizontal direction. In the figure, the symbol 20 is an inclined plate having a flat wall surface inclined with respect to the dust flow direction, 21 is a guide wall, and 26 is a limiting plate that limits the flow of the dust-containing airflow to the 3-shaped plate member 8b.

Between the V-shaped plate members 8a, partition plates 22 are arranged extending in the vertical direction, and a gap is provided between the V-shaped plate members 8a and the partition plates 22 through which dust can pass. In addition, extensions parallel to the partition plates 22 are provided at both ends of the V-shaped plate member 8a. The V-shaped plate member 8a and the partition plates 22 can prevent the rebound of sparks and dust while narrowing the airflow so that it can be introduced into the subsequent 3-shaped plate member 8b. The partition plates 22 are arranged parallel to the flow direction of the sucked dust, and the V-shaped plate members 8a are arranged at an inclination of 30 to 45 degrees (preferably 40 to 45 degrees) with respect to the flow direction (45 degrees in this embodiment). If the angle of the V-shaped plate member 8a becomes larger than 45 degrees, the rebound of sparks and dust will increase. In addition, even without the partition plates 22, the rebound will increase.

The 3-shaped plate member 8b is disposed so that the left or right inner wall surface of the central protrusion of the 3-shaped plate member 8b is located in front of the gap between the V-shaped plate member 8a and the partition plate 22. The dust (airflow) that passes through the gap moves along the inner wall surface of the 3-shaped plate member 8b and is cooled. In other words, the curved inner wall surfaces of the arc shape (approximately 3/4 arc shape) on both the left and right sides of the 3-shaped plate member 8b are walls that guide the dust in a spiral shape, resulting in a configuration that can increase the number of collisions with a small number of stages.

In addition, the number of stages of the three-shaped plate members 8b can be used to provide better fire extinguishing. In other words, the center of the next stage of the three-shaped plate members 8b is placed in front of the gap between the three-shaped plate members 8b arranged side by side in the horizontal direction. In this embodiment, three stages are used, but two stages, excluding the third stage closest to the filter mechanism 5, may be used. In addition, the radius of curvature of both ends and the degree of opening (the distance between both ends and the central protrusion) can be set as appropriate.

In this embodiment, the configuration uses a 3-shaped plate 8b with an arc-shaped curved inner wall surface that guides dust in a spiral shape on each side, but it may also be configured to use a C-shaped plate member 8c with a single (larger) arc-shaped curved inner wall surface (one of the opposing ends of the C-shape in plan view is flat rather than arc-shaped). In this case, for example, as shown in Figure 6, the first and second 3-shaped plate members 8b can be replaced with a single C-shaped plate member 8c.

In other words, the wall portion 8 can be any suitable configuration that combines a wall surface that is inclined with respect to the dust flow direction and a wall surface provided behind it that guides the dust in a spiral shape.

The V-shaped plate member 8a is erected on the folded portion at the bottom of the opening. The 3-shaped plate member 8b (C-shaped plate member 8c) is suspended from a member on the ceiling side, such as a second partition plate. These may also be erected on the bottom of the dust collector body 1.

Therefore, even if the dust contains sparks, it will be effectively cooled and extinguished before it reaches the filter mechanism 5 by repeatedly colliding with the V-shaped plate member 8a and the 3-shaped plate member 8b (C-shaped plate member 8c) located near the front opening 2.

The dust collector body 1 also has a pair of rectangular suction guide plates 10 on both the left and right sides of the front opening 2. The suction guide plates 10 are rotatable between a stored state along the side of the dust collector body 1 and a protruding state protruding forward of the dust collector body 1. By collecting grinding dust with the suction guide plates 10 in the protruding state, grinding dust can be collected more reliably.

Two dust boxes 23 are provided at the lower part (bottom) of the dust collector body 1 to collect dust particles that collide with the wall 8 or are brushed off from the surface of the filter mechanism 5. In the drawing, reference numeral 24 denotes a guide wall to the dust boxes 23, 28 denotes an opening and closing lid for inserting and removing the dust boxes 23, and 29 denotes a partition plate between the guide wall 24 and the limiting plate 26 to prevent sparks from reaching the filter mechanism 5 without passing through the 3-shaped plate 8b.

Since this embodiment is configured as described above, for example, when grinding work is performed before welding work, the grinding work is performed with a grinding machine such as a grinder in front of the front opening 2 so that sparks ( dust including sparks) fly toward the front opening 2, and after the grinding work, when the tip opening 3 of the local suction tube 4 is fixed in an appropriate position and welding work is performed, the grinding dust generated during the grinding work is sucked in through the front opening 2, and the welding fumes generated during the welding work are sucked in through the tip opening 4.

Therefore, there is no need to use separate dust collectors for grinding and welding work, and one dust collector can effectively collect both grinding dust and welding fumes.

Reference Signs List 1 Dust collector body 2 Front opening 3 Tip opening 4 Tube body 5 Filter mechanism 6 First closing mechanism 7 Second closing mechanism 8 Wall portion
10 Suction guide plate

Claims (7)

A dust collecting device comprising: a dust collector body having an intake and exhaust mechanism; a front opening provided on the front side of the dust collector body and capable of sucking in dust containing fire powder; and a fire extinguishing mechanism for extinguishing the fire powder sucked in from the front opening,
a tube for local suction, the base end of which is connected to the dust collector body, the tip end of which is provided with a tip opening having an opening area smaller than that of the front opening, and the position of the tip opening is adjustable and maintainable within a predetermined range;
A first closing mechanism that closes the tube;
A second closing mechanism that closes the front opening;
and a common filter mechanism for collecting dust sucked through the front opening and the tip opening. 2. The dust collecting device according to claim 1 , further comprising a switching mechanism for switching the intake and exhaust air volume of the intake and exhaust mechanism between a case where the tip opening of the tubular body is closed and suction is performed through the front opening, and a case where the front opening is closed and suction is performed through the tip opening of the tubular body. 3. A dust collecting apparatus according to claim 2 , wherein when suction is performed from the tip opening of the tube, the amount of air from the intake and exhaust mechanism is smaller than when suction is performed from the front opening. 4. The dust collecting device according to claim 2 , wherein the dust collecting device is configured so that a filtered air speed passing through the filter mechanism when suction is performed from the tip opening of the tubular body is 0.4 to 1.0 m/min. 5. The dust collecting device according to claim 2 , wherein the dust collecting device is configured so that a filtered air speed passing through the filter mechanism when suction is performed from the front opening is 1.0 to 2.0 m/min. 6. The dust collecting device according to claim 1, wherein the fire extinguishing mechanism includes a wall portion arranged in parallel in a direction intersecting the flow direction of the dust sucked from the front opening, for colliding the dust to cool the sparks . The dust collector according to any one of claims 1 to 6, characterized in that it has a pair of suction guide plates on both the left and right sides of the front opening, and the suction guide plates are rotatably provided between a stored state along the side of the dust collector body and a protruding state protruding forward of the dust collector body.

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