JP5537503B2 - Dust collection device and self-propelled cutting machine equipped with the same - Google Patents

Description

  The present invention relates to a dust collecting device and a self-propelled cutting machine equipped with the dust collecting device, and more particularly to a dust collecting device for collecting dust that is used for repairing a paved road surface and is generated when cutting the paved road surface. It relates to a self-propelled cutting machine.

In general, a self-propelled cutting machine used for repairing a paved road surface, etc. is installed under the vehicle body and cuts the paved road surface by rotating at high speed, and the paved road surface cut by this cutting drum. A belt conveyor that carries the waste material forward in the traveling direction of the vehicle body.
A cutting bit is provided on the outer peripheral surface of the cutting drum, and the cutting drum is rotated at a high speed while the vehicle body is self-propelled to cut the paved road surface. Paved road surface waste material generated by this cutting is transported from the cutting drum to a belt conveyor, and further transported from the belt conveyor to a vehicle such as a truck to remove the paved road surface waste material cut from the paved road surface. .

In this self-propelled cutting machine, a large amount of dust is generated because the paved road surface is cut by rotating the cutting drum at a high speed.
Furthermore, a large amount of dust is generated when the cut pavement surface waste material is carried out from the cutting drum to the belt conveyor, and also carried out from the belt conveyor to the vehicle or the like.
This dust may adversely affect the health of the operator who operates the self-propelled cutting machine, the worker of the paved road surface construction, and the residents of the area where the paved road surface work is performed.

  As means for suppressing and removing this dust, in Patent Document 1 (Japanese Patent Laid-Open No. 2009-13651), dustproof liquid is injected into a path through which pavement road surface waste material is transported from the cutting drum to the outside of the vehicle body through the belt conveyor. It has been proposed to dispose a spray nozzle that sprays dust-proof liquid from the spray nozzle onto the paved road surface waste material.

  However, in the path shown in Patent Document 1 in which the dust-proof liquid is sprayed on the pavement road surface waste material in the path carried out from the cutting drum through the belt conveyor to the outside of the vehicle body, a large amount of dust-proof liquid is used. There was a technical problem that fine dust scattering could not be suppressed without spraying. In addition, when the cutting drum is rotated at a high speed and a large amount of dust-proofing liquid is sprayed on the place where the paved road surface is cut, there is a technical problem that the cut road surface becomes muddy and the road surface condition deteriorates. It was. Furthermore, there has been a technical problem that the cost of the dustproof liquid increases by spraying a large amount of the dustproof liquid.

As means for solving these technical problems, there is a dry cutting dust collecting apparatus as disclosed in Patent Document 2 (Japanese Patent Laid-Open No. 2005-42504). The cutting powder collection | recovery apparatus shown by this patent document 2 is demonstrated based on FIG.
The cutting dust collecting apparatus 100 includes a cutting blade 101 covered with a blade cover 102. A suction duct 103 for sucking and collecting cutting dust is formed on the front side of the blade cover 102 in the direction of travel of the cutting machine, and is connected to a cyclone 105 via a connecting pipe 104.

An openable bottom plate 106 is provided at the bottom of the cyclone 105, and the bottom plate 106 can be opened and closed by operating a handle 107.
And in the state which the said baseplate 106 was closed, the bottom part of the cyclone 105 will be in the state sealed, and leakage of the fine cutting dust is prevented.
On the other hand, by opening the bottom plate 106, cutting dust accumulated on the bottom of the cyclone 105 can be collected in the dust collection bag 108. The dust bag 108 is easily attached to and detached from the lower part of the cyclone 105.

Further, a fan 109 of a suction device is connected to the upper part of the cyclone 105 via a filter 110, and a blowing pipe 111 is connected to the blowing port of the fan 109.
Further, the blowing pipe 111 is connected to a blowing port 112 provided on the rear side of the blade cover 102. The outlet 112 is provided with a valve 113 that controls the amount of air sent into the blade cover 102.

  In the cutting dust collecting apparatus 100, first, the fan 109 is started, and the cutting blade 101 is rotated at a high speed to start cutting the road surface and the like. The air flow blown into the blade cover 102 from the blowout port 112 cools the blade 101 and blows off the generated cutting dust, and then scatters and floats in the blade cover 10.

  The amount of air blown into the blade cover is less than the amount of air sucked from the blade cover by reducing the amount of air blown into the blade cover by restricting the valve 113 provided at the outlet 112. Become. In order to compensate for this, the air outside the blade cover 102 is sucked into the inside through the gap between the skirt of the blade cover 102 and the road surface, and the cutting dust floating in the blade cover 102 is removed from the gap. Suppresses leakage from

On the other hand, the air in the blade cover 102 is sucked into the duct 103 by the suction force of the fan 109, and the floating cutting powder is also sucked along therewith. The suctioned cutting dust is guided to the cyclone 105, air and cutting dust are separated, and the cutting dust falls below the cyclone 105 and accumulates on the bottom plate 106 provided at the bottom of the cyclone 105.
When an appropriate amount of cutting dust has accumulated on the bottom of the cyclone 105, the fan 109 is stopped, the handle 107 is operated to open the bottom plate 106, and the cutting dust is collected in the dust collection bag 108.

  Further, the air flow sucked from the cyclone 105 flows through the filter 110 to the suction port of the fan 109. The air flow returning to the fan 109 is cleaned and blown again into the blade cover 102 from the blowout port 112.

  Thus, in the dry-type cutting powder recovery device disclosed in Patent Document 2, it is possible to suppress the scattering of fine dust. Further, since the dustproof liquid is not sprayed, the cost of the dustproof liquid or the like can be suppressed, and deterioration of the road surface condition due to excessive spraying of the dustproof liquid can be suppressed.

JP 2009-13651 A JP 2005-42504 A

  However, in the cyclone of the dry cutting powder collecting device shown in Patent Document 2, fine cutting dust cannot be collected, and is finally configured to be captured by a filter. There was a technical problem that required maintenance work.

  The present invention has been made under the circumstances as described above, and the present invention is a person who operates a self-propelled cutting machine or a pavement surface construction worker from a large amount of dust generated by the self-propelled cutting machine. In addition, it was made to eliminate adverse health effects of residents in areas where paved roads are being constructed, and is based on the premise of a dry cutting dust collection device, without using a filter. An object of the present invention is to provide a dust collecting device that captures the dust and a self-propelled cutting machine equipped with the dust collecting device.

Has been made to solve the problems described above, dust collecting device according to the present invention, when cutting a paved road surface by a cutting drum, the dust collecting device for collecting the dust generated in the cutting drum chamber covering the cutting drum A suction duct that is attached at one end and sucks dust, a cyclone portion to which the other end of the suction duct is attached, a swirl flow forming tower that guides air removed by the cyclone portion as a swirl flow, and the swirl flow A spray nozzle for spraying mist-like water with respect to the swirling air derived from the forming tower, and a pavement surface waste material obtained by cutting the water sprayed by the spray nozzle with the cutting drum from the cutting drum chamber First belt conveyor for carrying out, second belt for receiving pavement road surface waste material from the first belt conveyor and carrying it out And any or drain port for draining both the conveyer, and a fan which sucks through a suction duct from the cutting drum chamber to form a helical flow in the cyclone unit to form a swirling flow in the swirling flow column, It is characterized by comprising .

In this way, the air dedusted by the cyclone unit is led out from the swirling flow forming tower as a swirling flow, and mist-like water is sprinkled by the spray nozzles with respect to the swirling flow air derived from the swirling flow forming tower. Therefore, fine cutting dust can also be collected. Therefore, the conventional filter becomes unnecessary, and the replacement of the filter and the maintenance work become unnecessary.
In addition, since the water sprayed by the spray nozzle is drained to one or both of the first belt conveyor and the second belt conveyor, the water can be used effectively and the cost can be reduced. . Since water is not sprayed on the road surface being cut, it is possible to suppress deterioration such as a muddy road surface state.

Here, a spiral flow forming plate formed in a spiral shape is provided on the upper portion of the cyclone portion to which the other end of the suction duct is attached, and air introduced from the suction duct is supplied to the spiral flow forming plate. It is desirable to flow as a spiral flow along.
By providing the spiral flow forming plate in this way, a stronger cyclone flow (spiral flow) can be formed in the cyclone portion, and finer cutting dust can be captured.

In addition, the cyclone section and a water spray section in which the injection nozzle is disposed are partitioned, and the cyclone section and the water spray section communicate with each other via the swirl flow forming tower, and air is removed by the cyclone section. However, it is desirable that the swirl flow is derived as a swirl flow from the swirl flow forming tower, and the spray nozzle sprays mist-like water with respect to the air of the derived swirl flow.
Thus, since the cyclone part and the watering part in which the injection nozzle is arranged are partitioned, water from the injection nozzle can be collected in the watering part, and the first belt conveyor, It can drain to either or both of the belt conveyors.

  Further, the watering part is provided with a rectifying cover in which a spiral slope part is formed, and the air derived from the swirl flow forming tower flows along the rectifying cover and is sucked by the fan. It is preferable in terms of efficiency.

In addition, a dust collection bag or a dust collection box including a dust collection bag is attached to a lower end portion of the cyclone unit, and the dust collection bag is a flexible rubber cylindrical bag body, and is attached to the upper end. The bottom part is formed in a flat shape, and when a negative pressure is applied to the dust collection bag via the cyclone part, the bottom part of the dust collection bag is closed, and the collected dust is It is desirable to be stored in a collection bag.
In the case of providing such a dust collection bag, when the dust collection device operates and negative pressure acts on the dust collection bag, the lower end of the dust collection bag is closed and the collected dust is stored in the dust collection bag. . Further, when the dust collecting device stops or when a predetermined amount of dust is stored, the lower end of the dust collecting bag can be opened and discharged to the outside.

Further, by providing a plurality of the drain ports, forming the first drain port at a position higher than the second drain port, opening the first drain port, and closing the second drain port, It is desirable to form a reservoir for storing the sprinkled water.
By forming the pool portion in this way, finer dust can be captured. After the work is finished, the second drainage port is opened to drain the water in the reservoir.

  Further, the cutting drum provided with a cutting bit for cutting the paved road surface, a cover plate that covers the upper portion of the cutting drum, front, rear, left and right portions to form a cutting drum chamber, and the paved road surface waste material cut by the cutting drum are cut. A first belt conveyor for carrying out from the drum chamber, a second belt conveyor for receiving pavement road surface waste material from the first belt conveyor and carrying it out to the outside, a first belt conveyor and a second belt conveyor It is desirable that the self-propelled cutting machine provided with a cover member that makes the conveying space as a sealed space include the dust collecting device.

  In this self-propelled cutting machine, as described above, the air dedusted by the cyclone part is derived as a swirl flow from the swirl flow forming tower, and the swirl flow air derived from the swirl flow formation tower is Since mist-like water is sprayed by the spray nozzle, fine cutting dust can also be collected. Therefore, the conventional filter becomes unnecessary, and the replacement of the filter and the maintenance work become unnecessary. In addition, since the water sprayed by the spray nozzle is drained to one or both of the first belt conveyor and the second belt conveyor, the water can be used effectively and the cost can be reduced. . Furthermore, since water is not sprayed on the road surface being cut, it is possible to suppress deterioration such as a muddy road surface state.

In addition, it is desirable that the exhaust from the fan is performed on the second belt conveyor and exhausted to the outside from the terminal portion of the second belt conveyor.
Thus, since it exhausts in the position away from the person who operates a self-propelled cutting machine, the person who operates a self-propelled cutting machine can be protected more from dust.
Further, it is desirable that the exhaust from the fan is exhausted into the cutting drum chamber. By configuring in this way, finer dust can be captured, and dusters can be used to operate self-propelled cutting machines, pavement surface construction workers, and residents in areas where pavement surface construction is performed. Can be more protected from.

  According to the present invention, it is possible to obtain a dust collection device that captures fine dust and a self-propelled cutting machine equipped with the dust collection device without using a filter, assuming a dry cutting dust collection device.

FIG. 1 is a partial cross-sectional view showing a schematic configuration of a self-propelled cutting machine according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a schematic configuration of the dust collecting apparatus shown in FIG. FIG. 3 is a cross-sectional view showing a cyclone portion and a watering portion of the dust collecting apparatus shown in FIG. 4 is a cross-sectional view taken along the line II of FIG. 5 is a cross-sectional view taken along the line II-II in FIG. FIG. 6 is an exploded cross-sectional view of the cyclone unit and the watering unit of the dust collection device shown in FIG. 3. FIG. 7 is a perspective view showing another embodiment. FIG. 8 is a plan view showing another embodiment shown in FIG. FIG. 9 is a cross-sectional view showing another embodiment shown in FIG. FIG. 10 is a cross-sectional view showing a schematic configuration of a dust collecting apparatus showing an embodiment in which a return pipe is provided in an exhaust duct. FIG. 11: is sectional drawing which shows the cyclone part and watering part of the dust collection | recovery apparatus which show other embodiment. FIG. 12 is a perspective view showing a modification in which a dust collection bag is attached to a dust collection box. FIG. 13 is a cross-sectional view showing a modification of the other embodiment shown in FIG. FIG. 14 is a schematic configuration diagram showing a conventional dry cutting powder collecting apparatus.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
The self-propelled cutting machine according to the present invention is a conventional self-propelled cutting machine provided with a cutting dust collecting device that captures fine dust. First, an outline of a self-propelled cutting machine will be described with reference to FIG.
The self-propelled cutting machine 1 includes a driver's seat 3 provided substantially at the upper center of the vehicle body 2, an engine 4 that is a driving device provided in the vehicle body 2, and a caterpillar driven by the engine 4. A cutting drum 6 provided with a large number of cutting bits, provided in the width direction at a substantially central lower portion of the vehicle body 2, the upper portion of the cutting drum 6, the front and rear left and right portions, and a cutting drum chamber 7. The cover plate 8 is formed.
Thus, since the cover plate 8 covers the upper part of the cutting drum 6 and the front, rear, left and right parts, and the cutting drum chamber 7 is in a substantially sealed state, scattering of dust from the cutting drum chamber 7 to the outside is suppressed. The

The cutting drum 6 is provided so as to be rotatable at high speed by the engine 4 or the like, and is configured to cut a paved road surface to be repaired.
Furthermore, a first belt conveyor 9 is provided for carrying out the paved road surface waste material A cut by the cutting drum 6 from the cutting drum chamber 7. The starting end of the first belt conveyor 9 is provided in the cutting drum chamber 7, and the terminal end of the first belt conveyor 9 is arranged to be located at the front portion of the vehicle body 2. Further, the upper part of the first belt conveyor 9, that is, the space in which the pavement road surface waste material A is conveyed is covered with a cover member 9a and is hermetically sealed so that scattering of dust to the outside is suppressed. Has been.

Further, it is disposed so as to be movable by a link mechanism 11 in the vertical and horizontal directions with respect to the front upper part of the vehicle body 2 and receives the pavement surface waste material A from the first belt conveyor 9 and carries it to the vehicle 12. A second belt conveyor 10 is provided.
As for the second belt conveyor 10, similarly to the first belt conveyor 9, the upper portion of the second belt conveyor 10, that is, the space where the pavement road surface waste material A is conveyed is covered with a cover member 10 a and sealed. It is not in a state and is configured to suppress dust scattering to the outside.
In this way, the path from the cutting drum chamber 7 to the end of the second belt conveyor 10 is in a substantially sealed state, and the dust is prevented from being scattered to the outside.

Next, the dust collection device with which this self-propelled cutting machine 1 is provided is demonstrated based on FIG. 2 thru | or FIG.
First, an outline of the dust collecting apparatus will be described based on FIG. As shown in FIG. 2, the dust collecting device 20 includes a cover plate 8 that covers the cutting drum 6, and a cutting drum chamber 7 that is sealed by the cover plate 8 is formed around the cutting drum 6. .
One end S of a suction duct 21 that sucks dust is attached to the cutting drum chamber 7, and the other end is connected to the cyclone unit 22. Dust in the cutting drum chamber 7 is sucked by the suction duct 21 and discharged to the cyclone unit 22.

A sprinkler 23 is provided at the top of the cyclone 22.
The water sprinkling unit 23 includes a swirl flow forming tower 24 for deriving the dust removed by the cyclone unit 22 as a swirl flow, and a mist-like water for the swirl flow air derived from the swirl flow formation tower 24. And an injection nozzle 25 for spraying water. And by spraying the mist-like water with respect to the swirling air by the jet nozzle 25, fine dust can be removed and the air is purified.

  Moreover, the water sprayed to the water sprinkling part 23 is drained outside from the water sprinkling part 23 through the drain outlets 26a and 26b. The water from the drain outlets 26a and 26b is drained to one or both of the first belt conveyor 9 and the second belt conveyor 10. By this drainage, scattering of dust from the pavement surface waste material A to be conveyed can be suppressed.

A fan 28 of a suction device is provided, and the cleaned air is exhausted onto the second belt conveyor 10 through the exhaust duct 31 and finally the end E of the second belt conveyor 10 (see FIG. 1). Exhaust from.
Thus, because the exhaust is finally exhausted from the end E of the second belt conveyor 10, that is, exhausted at a position away from the person operating the self-propelled cutting machine, the self-propelled cutting machine is The operator can be further protected from dust.

  Furthermore, the cyclone part 22 and the water sprinkling part 23 are demonstrated based on FIG. 3 thru | or FIG. The suction duct 21 is connected to the upper part of the cyclone portion 22. The cyclone portion 22 is formed in a conical shape that gradually tapers in the downward direction. A dust collection box 34 in which fine cutting dust is accumulated is provided at the bottom of the cyclone unit 22.

Although not shown, an openable bottom plate is provided between the lowermost part of the cyclone portion 22 and the dust collection box 34 as in the conventional case shown in FIG. 12, and the handle is operated. Therefore, the bottom plate can be opened and closed. And in the state which the said baseplate was closed, the bottom part of the cyclone part 22 will be in the sealed state, and leakage of the fine cutting dust is prevented.
On the other hand, by opening the bottom plate, cutting dust accumulated on the bottom of the cyclone 22 can be collected in the dust collection box 34. A bag may be accommodated in the dust collection box 34, and the cutting dust may be collected in the bag.

Further, a spiral flow forming plate 29 is provided on the upper portion of the cyclone portion 22. The spiral flow forming plate 29 is a plate formed in a spiral shape, and forms a stronger cyclone in the cyclone portion 22 when the air introduced from the suction duct 21 collides.
A fixing member 22 a of the swirl flow forming tower 24 is disposed inside the spiral flow forming plate 29. The fixed member 22a of the swirl flow forming tower 24 is formed in a cylindrical shape so that the swirl flow forming tower 24 fits inside the fixed member 22a. Further, the fixing member 22 a is fixed to the ceiling wall surface 30 of the cyclone part 22 so that one end of the fixing member 22 a is located on the water spray part 23 and the other end is located on the cyclone part 22. The swirl flow forming tower 24 is fixed to the ceiling wall surface 30 of the cyclone part 22 by fitting the swirl flow forming tower 24 to the fixing member 22a.

The cyclone portion 22 and the water sprinkling portion 23 provided on the upper portion of the cyclone portion 22 are separated by a ceiling wall surface 30, and a swirl flow forming tower 24 is attached by a fixing member 22 a fixed to the ceiling wall surface 30. .
And it is comprised so that air may flow in from the cyclone part 22 into the water sprinkling part 23 via this swirl | flow flow formation tower 24. FIG.

  The swirl flow forming tower 24 has a conical cap portion 24a in the upper portion, a derivation portion 24b that is located below the cap portion 24a and includes a flap 24c that guides air from the cyclone portion 22 as a swirl flow, The cylindrical portion 24d is positioned below the lead-out portion 24b and is fitted and fixed to a fixing member attached by the wall surface 30.

  The spray nozzle 25 is provided with a water tank 32 for storing water, and a pump 33 for supplying water from the water tank 32 to the nozzle, and water of a predetermined pressure is in a mist form (mist form). It is configured to be sprayed. The spray nozzle 25 may be of any method and form as long as it can form water in a mist form. This mist state is preferably set to a mist shape (mist shape) of about 10 to 100 microns in order to be mixed with the dust and easily combined with the dust.

In addition, the injection port of the injection nozzle 25 is located at the apex of the cap portion 24a, and is configured to spray mist-like water. When mist-like water is sprinkled toward the top of the cap portion 24a in this way, the mist-like water rebounds by the cap portion 24a and diffuses more uniformly in the space.
On the other hand, since air from the cyclone unit 22 is led out as a swirling flow from the lead-out unit 24b including the flap 24c, the dust is sufficiently mixed with the mist, and the fine dust is captured by the mist and is formed on the bottom surface of the sprinkling unit. Accumulated.
Thus, by spraying mist-like water on the swirling air, fine dust can be removed and the air can be purified.

Also, the fine dust accumulated on the bottom surface of the water sprinkling portion 23 is water that has captured the mist, as described above, on the first belt conveyor 9 and the second belt conveyor via the drain ports 26a and 26b. 10 is drained either or both. Thereby, scattering of the dust from the paved road surface waste material A conveyed can be suppressed. Moreover, the water from the injection nozzle 25 can be utilized effectively.
Then, the air purified by the water sprinkling unit 23 is exhausted from the terminal end E of the belt conveyor 10 through the exhaust duct 27, the fan 28, and the exhaust duct 31.

In addition, as shown in FIG. 7 thru | or FIG. 9, the rectification | straightening cover 40 is used in order to improve the efficiency of the exhaust_gas | exhaustion from the exhaust duct 27, and to efficiently use the water spray from the injection nozzle 25, and to capture dust efficiently. You may attach to the front-end part of the exhaust duct 27. FIG.
The rectifying cover 40 includes a standing portion 40d. One end portion 40a of the standing portion 40d is formed with a hole 40b into which the exhaust duct 27 is inserted, and the other end portion 40c is in contact with the side wall of the sprinkling portion 23. It is formed as follows. Furthermore, an inclined surface portion 40e is formed so as to be inclined from the lower end portion of the standing portion 40d toward the side wall of the water sprinkling portion 23. The inclined surface portion 40 e is formed in a spiral shape that gradually rises from the side wall of the water sprinkling portion 23 toward the exhaust duct 27.

A skirt portion 40f extending downward is provided on the outer peripheral portion of the inclined surface portion 40e. As shown in FIG. 9, an injection nozzle 25 is provided inside the rectifying cover 40 so as to penetrate the skirt portion 40 f.
Thus, since the injection nozzle 25 is disposed inside the rectifying cover 40 surrounded by the skirt portion 40f, it suppresses the diffusion of the dust led out from the lead-out portion 24b of the swirl flow forming tower 24 and diffuses. It can be mixed well with the mist before doing so, and dust can be captured efficiently.
Furthermore, by attaching the rectifying cover 40 to the front end portion of the exhaust duct 27, the air led out from the swirl flow forming tower 24 is sucked into the exhaust duct 31 while being guided by the upright portion 40d and the inclined surface portion 40e, and is exhausted. The exhaust from the duct 27 can be made efficient.

Further, in the above embodiment, the cleaned air from the fan 28 of the suction device is exhausted through the exhaust duct 31 onto the second belt conveyor 10, and finally the second belt conveyor 10. It is configured to exhaust from the end portion E (see FIG. 1).
However, as shown in FIG. 10, a return pipe 51 having one end connected to the cutting drum chamber 7 and the other end connected to the switching device 50 is provided, and the cleaned air from the fan 28 of the suction device is supplied to the cutting drum chamber. You may return to 7. That is, the switching device 50 may be configured so that the purified air from the fan 28 of the suction device is switched from the exhaust duct 31 side to the return pipe 51 and introduced into the cutting drum chamber 7.

By configuring in this way, finer dust can be captured, and dusters can be used to operate self-propelled cutting machines, pavement surface construction workers, and residents in areas where pavement surface construction is performed. Can be more protected from.
The switching device 50 allows a part of the cleaned air from the fan 28 of the suction device to pass through the cutting drum chamber 7, and the remaining portion of the cleaned air from the fan 28 of the suction device passes through the exhaust duct 31. You may exhaust to the 2nd belt conveyor 10. FIG.

Moreover, in the said embodiment, the water sprayed to the water sprinkling part 23 is comprised so that it may drain outside from the water sprinkling part 23 via the drain outlets 26a and 26b.
However, as shown in FIG. 11, the drain port 26 a may be formed at a position higher than the drain port 26 b, and the pool portion 52 may be provided in the sprinkling portion 23. That is, if a valve (not shown) is provided in the drain outlet 26b and water is sprayed with the valve closed, a reservoir 52 is formed in the sprinkler 23 and drained from the drain 26a at a predetermined height. The
By forming the pool portion 52 in this manner, finer dust can be captured, and a person who operates a self-propelled cutting machine, a pavement road construction worker, or a pavement road construction is being performed. Can protect local residents from dust more. In addition, after completion | finish of work, the valve (not shown) of the drain outlet 26b is opened, and the water of the reservoir part 52 is drained.

Moreover, in the said embodiment, although the case where dust was collect | recovered to the dust collection box 34 was demonstrated, as shown to FIG. 11, FIG. 12, the bottom of the dust collection box 34 (on the cyclone part 22). A dust collection bag 53 may be provided in the lower part.
The dust collection bag 53 is a flexible rubber cylindrical bag body, the upper end portion 53a attached to the dust collection box 34 is cylindrical, and the lower end portion 53b is formed in a flat shape.
When such a dust collection bag 52 is provided, it is not necessary to provide an openable bottom plate between the dust collection box 34 and the dust collection box 34. Moreover, although the case where the dust collection bag 53 was attached via the dust collection box 34 was demonstrated, you may make it attach directly to the lower end part of the cyclone part 22. FIG.

That is, when the dust collection device operates and negative pressure acts on the dust collection box 34 (dust collection bag 53) via the cyclone unit 22, the lower end portion 53b of the dust collection bag 53 is closed, and the collected dust is collected as dust. When the dust collecting device is stored in the collecting bag 52 and the dust collecting device is stopped or when a predetermined amount of dust is stored, the lower end portion 53b of the dust collecting bag 53 is opened and released to the outside.
In addition, when discharge | release becomes a problem outside, the hook part 54 may be provided in the lower end part of the dust collection bag 52, and this hook part 54 may be latched by the latching | locking part 55 provided in the dust collection box 34. . When the hook portion 54 is locked to the locking portion 55 in this manner, the dust collection bag 52 is folded in two, and the dust collection bag is also stored when the dust collection device is stopped or when a predetermined amount of dust is stored. Dust is not released to the outside from the lower end 53 b of 53.

Further, in the embodiment shown in FIGS. 7 to 9, the injection nozzle 25 is disposed inside the rectifying cover 40 surrounded by the skirt portion 40f, and is led out from the lead-out portion 24b of the swirl flow forming tower 24. Although the case where dust is prevented from being diffused and mixed sufficiently with mist before being diffused to capture dust efficiently has been described, separately from the spray nozzle 25, the spray nozzle is further provided outside the rectifying cover 40. 56 may be provided.
Thus, by providing the injection nozzle 56, dust and mist can be sufficiently mixed, and dust can be captured efficiently.

As described above, in the present invention, since the mist-shaped water is further sprinkled with respect to the air derived from the cyclone unit, the fine cutting dust that cannot be collected by the cyclone unit is also collected. Can do. As a result, there is no need to provide a filter for collecting fine cutting dust. Also, no filter replacement or maintenance work is required.
Moreover, the water used for watering can be controlled by draining the water on either the first belt conveyor, the second belt conveyor, or both, so that the dust generated on the belt conveyor can be suppressed, and the effective use of water can be improved. Figured. Furthermore, since water is not sprayed into the cutting drum chamber, it is possible to suppress deterioration of the road surface condition due to excessive water spraying.

DESCRIPTION OF SYMBOLS 1 Self-propelled cutting machine 6 Cutting drum 7 Cutting drum chamber 8 Cover board 9 1st belt conveyor 9a Cover member 10 2nd belt conveyor 10a Cover member 20 Dust collection device 21 Suction duct 22 Cyclone part 22a Fixing member 23 Sprinkling part 24 swirl flow forming tower 24a cap portion 24b lead-out portion 24c flap 24d cylindrical portion 25 injection nozzle 26a drain port 26b drain port 27 exhaust duct 28 fan (suction device)
29 Spiral flow forming plate 30 Ceiling wall surface 31 Exhaust duct 32 Water tank 33 Pump 34 Dust collection box 40 Rectification cover A Waste pavement surface material

Claims (9)

In the dust collection device that collects the generated dust when cutting the paved road surface with a cutting drum,
One end is attached to the cutting drum chamber covering the cutting drum, and a suction duct for sucking dust,
A cyclone portion to which the other end of the suction duct is attached;
A swirl flow forming tower for deriving the air removed by the cyclone as a swirl flow;
An injection nozzle that sprinkles mist-like water with respect to the swirling flow air derived from the swirling flow forming tower;
The first belt conveyor for carrying out the pavement road surface waste material obtained by cutting water sprayed by the spray nozzle from the cutting drum chamber, receiving the pavement road surface waste material from the first belt conveyor, A drain outlet for draining either or both of the second belt conveyors to carry out;
A fan that sucks from the cutting drum chamber through a suction duct, forms a spiral flow in the cyclone section, and forms a swirl flow in the swirl flow forming tower;
A dust collection device comprising: On the upper part of the cyclone portion to which the other end of the suction duct is attached, a spiral flow forming plate formed in a spiral shape is provided,
The dust collection device according to claim 1, wherein air introduced from the suction duct flows as a spiral flow along the spiral flow forming plate. The cyclone part and the watering part in which the injection nozzle is arranged are partitioned, and the cyclone part and the watering part communicate with each other via the swirl flow forming tower,
The dust removed by the cyclone section is led out as a swirl flow from the swirl flow forming tower, and the spray nozzle sprinkles mist-like water with respect to the swirled flow air. The dust collection device according to claim 1 or 2.   The irrigation part is provided with a rectifying cover in which a spiral slope is formed, and the air led out from the swirl flow forming tower flows along the rectifying cover and is sucked by the fan. Item 4. The dust collecting apparatus according to Item 3. A dust collection bag equipped with a dust collection bag or a dust collection bag is attached to the lower end of the cyclone unit,
The dust collection bag is a flexible rubber cylindrical bag body, the upper end portion to be attached is cylindrical, the lower end portion is formed in a flat shape,
2. The device according to claim 1, wherein when a negative pressure is applied to the dust collection bag via the cyclone unit, the lower end of the dust collection bag is closed, and the collected dust is stored in the dust collection bag. Item 5. The dust recovery device according to any one of Items 4 to 5. By providing a plurality of the drain ports, forming the first drain port at a position higher than the second drain port, opening the first drain port, and closing the second drain port,
The dust collecting device according to any one of claims 1 to 5, wherein a reservoir for storing water sprayed by the spray nozzle is formed. A cutting drum provided with a cutting bit for cutting a paved road surface, a cover plate that covers an upper portion of the cutting drum, front, rear, left and right portions and forms a cutting drum chamber, and paving road surface waste material cut by the cutting drum, the cutting drum chamber A first belt conveyor for unloading, a second belt conveyor for receiving pavement road surface waste material from the first belt conveyor and unloading to the outside, and conveyance of the first belt conveyor and the second belt conveyor In a self-propelled cutting machine with a cover member that makes the space a sealed space,
Self-propelled cutting machine characterized by comprising a dust collecting apparatus according to any one of the claims 1 to 6.   The self-propelled cutting machine according to claim 7, wherein exhaust from the fan is performed on a second belt conveyor and exhausted to the outside from a terminal portion of the second belt conveyor.   The self-propelled cutting machine according to claim 7, wherein the exhaust from the fan is exhausted into a cutting drum chamber.

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