Dust collector

Abstract

To provide a dust collector which can perform good dust collection in a grinding work and a welding work with one unit.SOLUTION: A dust collector comprises: a dust collector body 1 having an air suction and exhaust mechanism; a front opening part 2 which is provided on a front surface of the dust collector body 1 and can suck powder dusts containing fire powders; and a fire extinguishment mechanism for extinguishing the fire powders sucked from the front opening part 2. The dust collector has: a shell 4 for local suction of which a base end side is connected to the dust collector body 1 and on a tip side of which a tip opening part 3 having an opening area smaller than that of the front opening part 2 is provided, and can adjust and hold a position of the tip opening part 3 within a prescribed range; and a common filter mechanism 5 which collects the powder dusts sucked by the front opening part 2 and the tip opening part 3.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a dust collecting device. [Background technology]

[0002] In metal processing factories, various types of dust collectors are used to prevent health hazards to workers.

[0003] For example, a dust collector for grinding work (including cutting and polishing) has a metal suction opening and a fire extinguishing mechanism, and is designed to prevent fire. powder Even if grinding dust containing fluorine is sucked and captured, it is possible to effectively prevent burning to filters, etc. (Patent Document 1).

[0004] Furthermore, a dust collector for welding used during welding work has a duct arm that can move a hood to the vicinity of the source of welding fumes (welding work position) and hold it in that position (Patent Document 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Unexamined Patent Publication No. 60-22917 [Patent Document 2] Publication No. 3212508 Summary of the Invention [Problem to be solved by the invention]

[0006] Conventionally, for example, when welding and grinding operations are planned, the above-mentioned two types of dust collectors have been prepared, respectively.

[0007] An object of the present invention is to provide a dust collecting device capable of collecting dust during grinding and welding operations with a single device. [Means for solving the problem]

[0008] The gist of the present invention will now be described with reference to the accompanying drawings.

[0009] The dust collector body 1 has an intake and exhaust mechanism, a front opening 2 is provided on the front of the dust collector body 1 and is capable of sucking in dust including fire powder, and the fire powder sucked in from the front opening 2 is sucked in. powder and a fire extinguishing mechanism for extinguishing the 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 can be freely adjusted and maintained within a predetermined range; A first closing mechanism 6 that closes 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.

[0010] Also, claims Article 1 The dust collecting device described above 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.

[0011] Also, claims 2 The dust collecting device described herein 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.

[0012] Also, claims 2,3 The dust collecting device according to any one of claims 1 to 5, characterized in that the dust collecting device is configured so that the filtered air speed 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.

[0013] Also, claims 2~4This dust collecting device is characterized in that, in the dust collecting device described in any one of claims 1 to 5, the filtering 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.

[0014] In addition, claims 1 to 5 In the dust collecting device according to any one of claims 1 to 5, the fire extinguishing mechanisms are arranged in a direction intersecting a flow direction of the dust sucked from the front opening 2, and collide the dust to extinguish the fire. powder The present invention relates to a dust collecting device characterized in that it includes a wall portion 8 for cooling the dust collecting device.

[0015] The present invention relates to a dust collecting device as described in any one of claims 1 to 6, characterized in that the dust collecting device 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 rotatably arranged between a stored state along the side of the dust collecting body 1 and a protruding state protruding forward of the dust collecting body 1. Effect of the Invention

[0016] Since the present invention is configured as described above, it provides a dust collecting device that can effectively collect dust during grinding and welding operations. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a schematic explanatory perspective view of the present embodiment. [Diagram 2] FIG. 2 is a schematic cross-sectional view of the present embodiment. [Diagram 3] FIG. 1 is a schematic explanatory vertical sectional view of the present embodiment. [Figure 4] FIG. 1 is a schematic explanatory vertical sectional view of the present embodiment. [Diagram 5] FIG. 2 is an enlarged schematic explanatory cross-sectional view of a wall portion 8 of the present embodiment. [Figure 6] FIG. 11 is an enlarged schematic explanatory cross-sectional view of a wall portion 8 in another example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] A preferred embodiment of the present invention will be briefly described below with reference to the drawings to illustrate the operation of the present invention.

[0019] For example, when grinding work is performed before welding work, sparks (fire) may fly toward the front opening 2 in front of the front opening 2. powder Grinding work is carried out with a grinding machine such as a grinder so that dust containing rubbing agent (including rubbing agent) flies, and after the grinding work, the tip opening 3 of the tube body 4 for local suction is fixed in an appropriate position and welding work is carried out.

[0020] At this time, grinding dust generated during grinding work is sucked in from the front opening 2, and welding fumes generated during welding work are sucked in from the front opening 3.

[0021] Therefore, it is not necessary to use separate dust collectors for the grinding operation and the welding operation, and it is possible to effectively collect both grinding dust and welding fumes with a single dust collector. EXAMPLES

[0022] A specific embodiment of the present invention will now be described with reference to the drawings.

[0023] This embodiment includes 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 including fire powder, and a fire collector 2 for sucking in the fire powder sucked in from the front opening 2. powder and a fire extinguishing mechanism for extinguishing the above-mentioned dust collecting device.

[0024] As shown in Figures 1 and 2, this embodiment has a local suction tube 4 whose base end is connected to the dust collector main body 1 and whose tip end is provided with a tip opening 3 having an opening area smaller than that of the front opening 2, and which is configured so that the position of the tip opening 3 can be freely adjusted and maintained within a predetermined range, and a common filter mechanism 5 which collects dust sucked through the front opening 2 and the tip opening 3.

[0025] Each part will now be described in detail.

[0026] The dust collector body 1 has an overall box shape of a substantially rectangular parallelepiped, a rectangular front opening 2 is provided in the center of the front surface, and an exhaust port 27 is provided on the top surface. A step surface 11 is provided on the top surface, and the base end side of the pipe body 4 is connected to this step surface 11 so as to be rotatable in the horizontal direction so as to communicate with the inside of the dust collector body 1. Specifically, the step 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 to which the base end side of the pipe body 4 is connected is provided on this step surface 11.

[0027] The tube 4 is a flexible duct having a hood 12 at its tip and incorporating a flexible arm structure, and is configured so that the vertical position of the hood 12 can be adjusted freely within a movable range and the position can be maintained.

[0028] The tip of the tube 4 has a first closing mechanism 6 that closes the tip opening 3. The first closing mechanism 6 is an air volume adjustment damper. Specifically, a closing plate 13 that approximately 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 closing mechanism 6 may be provided in the middle part or the base end, but is preferably provided in the tip part (near the hood 12) from the viewpoint of operability.

[0029] By configuring the tube body 4 to be attached to the top side of the dust collector body 1, it is possible to save space compared to a case in which it is attached to the side, and the tube body 4 can be easily handled, resulting in a user-friendly configuration.

[0030] The dust collector body 1 is also provided with a second closing mechanism 7 for closing the front opening 2. The second closing mechanism 7 is composed of rails 15 provided along the upper and lower edges of the front opening 2 and a lid body 16 whose upper and lower ends engage with the rails 15 (so-called Kendon-type closing 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 body is not used), the lid body 16 can be stored by engaging the upper and lower ends with the storage rails 17, respectively. Note that the closing lid is not limited to the Kendon type, and may be a vertical sliding type closing lid in which the position of the lid body 16 can be switched between the upper and lower positions by providing vertical slide rails along the left and right edges of the front opening 2 and extending to the lower part of the front of the dust collector body 1, and providing a lock mechanism that can hold the position of the lid body 16 at the upper position (state in which the front opening 2 is closed) or the lower position (stored state).

[0031] 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. Grinding dust sucked in from the front opening 2 and welding fumes sucked in 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.

[0032] FIG. 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 FIG. 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.

[0033] An intake and exhaust mechanism (intake and exhaust fan 9) is provided on the upper part of the dust collector body 1. The intake and exhaust fan 9 is disposed in the first partition wall 18 so as to communicate with an opening of the first partition wall 18, and performs intake and exhaust.

[0034] In addition, in this embodiment, a switching mechanism is provided which switches 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.

[0035] 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 a configuration in which switching and adjustment are performed by an air volume adjustment damper provided in the flow path, for example, may also be used.

[0036] Specifically, when suction is performed from the tip opening 3 of the tubular body 4, the intake and exhaust mechanism is controlled so that the air volume of the intake and exhaust mechanism is smaller (for example, about half) than when suction is performed from the front opening 2.

[0037] A second partition wall 19 is provided below the first partition wall 18, with a filter mechanism 5 vertically attached to the underside thereof. Clean air passing through the filter mechanism 5 and the opening of the second partition wall 19 is exhausted via the intake / exhaust fan 9. A plurality of filter mechanisms 5 are arranged in parallel in the horizontal direction on the far side of a wall portion 8, which will be described later.

[0038] In this embodiment, the filtered air speed passing through the filter mechanism 5 when suction is performed from the tip opening 3 of the tubular body 4 is set to 0.4 to 1.0 (preferably 0.5 to 0.8) m / min, and the filtered air speed 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 are determined in consideration of the particle size (ease of clogging) and processing air volume of the welding fumes sucked from the tip opening 3 and the grinding dust sucked from the front opening 2.

[0039] Specifically, for example, when the opening of the front opening 2 is 1 m wide x 0.5 m high, in order to obtain the above-mentioned filtration wind speed (while obtaining a wind speed of 1 m / s at the opening surface), a wind speed of 30 m 3For example, if the opening of the tip opening 3 is 0.17 m in diameter, a flow rate of about 14 m / s is required to obtain the above-mentioned filtration air velocity (while obtaining a wind velocity of 10 m / s at the opening surface). 3 An intake and exhaust air volume of about / min is required.

[0040] The filter mechanism 5 is composed of a cylindrical cloth filter (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.

[0041] The filter area of ​​the filter mechanism 5 is set in consideration of the appropriate range of the filtered air speed, the amount of air sucked from the front opening 2, and the amount of air sucked from the tip opening 3. That is, in the case of a configuration in which the amount of air sucked from the tip opening 3 is switched to about half of that when sucked from the front opening 2 as described above, in this embodiment, the filter area is set to 18 m 2 If the amount is set to about 100%, the above filtration air velocity will be satisfied.

[0042] The fire extinguishing mechanisms are arranged in a direction intersecting the flow direction of the dust sucked from the front opening 2, and collide the dust to extinguish the fire. powder It includes a wall portion 8 for cooling the

[0043] In this embodiment, the wall portion 8 has a length in the vertical direction, and includes 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, as shown in Figures 2 and 5. A plurality of V-shaped plate members 8a and 3-shaped plate members 8b are arranged in parallel at predetermined intervals in the horizontal direction. In the figures, reference numeral 20 denotes an inclined plate having a flat wall surface inclined with respect to the dust flow direction, 21 denotes a guide wall, and 26 denotes a limiting plate for limiting the flow of the dust-containing air current to the 3-shaped plate member 8b.

[0044] Between the V-shaped plate members 8a, partition plates 22 are arranged extending in the vertical direction, and a gap through which dust can pass is provided between the V-shaped plate members 8a and the partition plates 22. 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 throttling the airflow so that the airflow is 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 increases. In addition, the rebound increases even without the partition plates 22.

[0045] The 3-shaped plate member 8b is disposed so that the left inner wall surface or the 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 arc-shaped (approximately 3 / 4 arc-shaped) curved inner wall surfaces on both the left and right sides of the 3-shaped plate member 8b are wall surfaces that guide the dust in a spiral shape, and this configuration allows for a large number of collisions with a small number of stages.

[0046] Furthermore, the number of stages of the three-shaped plate members 8b can be increased to provide better fire extinguishing. In other words, the center of the next stage of the three-shaped plate members 8b is arranged in front of the gap between the three-shaped plate members 8b arranged side by side in the horizontal direction. Although three stages are provided in this embodiment, two stages excluding the third stage closest to the filter mechanism 5 may be used. 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.

[0047] In this embodiment, the configuration uses 3-shaped plates 8b having arc-shaped curved inner wall surfaces on the left and right sides that guide dust in a spiral shape, but a configuration using a C-shaped plate member 8c having a (larger) single arc-shaped curved inner wall surface (one of the opposing ends of the C-shape in plan view is flat rather than arc-shaped) may also be used. In this case, for example, as shown in Fig. 6, the first and second 3-shaped plate members 8b can be replaced with one C-shaped plate member 8c.

[0048] That is, the wall portion 8 can be appropriately configured by combining a wall surface that is inclined with respect to the direction of dust flow and a wall surface provided behind the wall surface that guides the dust in a spiral shape.

[0049] 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.

[0050] Therefore, even if dust contains sparks, it will repeatedly collide with the V-shaped plate member 8a and the 3-shaped plate member 8b (C-shaped plate member 8c) provided near the front opening 2, and will be effectively cooled and extinguished before reaching the filter mechanism 5.

[0051] Further, a pair of rectangular suction guide plates 10 are provided on both the left and right sides of the front opening 2 of the dust collector body 1. The suction guide plates 10 are provided rotatably 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, the collection of grinding dust can be performed more reliably.

[0052] 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 part 8 or are brushed off from the surface of the filter mechanism 5. In the drawing, the 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 between the guide wall 24 and the limiting plate 26. powder This is a partition plate that prevents the air from reaching the filter mechanism 5 without passing through the T-shaped plate 8b.

[0053] Since this embodiment is configured as described above, for example, when performing grinding work before welding work, sparks (sparks) are generated in front of the front opening 2 toward the front opening 2. powder Grinding work is performed with a grinding machine such as a grinder so that dust particles (including fumes) fly, 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. Grinding dust generated during the grinding work is sucked in from the front opening 2, and welding fumes generated during the welding work are sucked in from the tip opening 4.

[0054] Therefore, it is not necessary to use separate dust collectors for the grinding operation and the welding operation, and it is possible to effectively collect both grinding dust and welding fumes with a single dust collector. [Explanation of symbols]

[0055] 1 Dust collector body 2 Front opening 3 Tip opening 4. Body 5 Filter mechanism 6 First Closure Mechanism 7 Secondary blocking mechanism 8 Wall section 10 Suction guide plate

Claims

1. 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. 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. 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. 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. 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. 6. The dust collecting device according to claim 1, wherein the fire extinguishing mechanism includes a wall portion arranged in a direction intersecting the flow direction of the dust sucked from the front opening and for colliding the dust with the wall portion to cool the powder.

7. The dust collecting device according to any one of claims 1 to 6, further comprising a pair of suction guide plates on both the left and right sides of the front opening, the suction guide plates being rotatably arranged between a stored state along the side of the dust collecting body and a protruding state protruding forward of the dust collecting body.

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