JP2018145689A - Dust-proof sprinkling apparatus and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust-proof sprinkling apparatus and method capable of more reliably suppressing diffusion of dust generated when a crushing operation is performed using a construction machine.SOLUTION: First sprinkling means 2 is provided in an attachment 25 attached to a distal end portion of an arm 24 of a construction machine 20 or in the vicinity thereof, and second sprinkling means 3 is provided at a rear end of the first sprinkling means 2 with respect to a longitudinal direction of the arm 24. The first sprinkling means 2 and the second sprinkling means 3 are constituted by a sprinkling nozzle 4 having a flexible tube 4a and a guide fin 4b. In a crushing operation, water W is sprinkled by the first sprinkling means 2 to form a first diffusion preventing space N1 covered with water W, while water W is sprinkled by the second sprinkling means 3 to form a second diffusion preventing space N2 covered with water W, and the first diffusion preventing space N1 is covered with the second diffusion preventing space N2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a dustproof watering device and method, and more particularly to a dustproof watering device and method that can more reliably suppress the diffusion of dust generated when a crushing operation is performed using a construction machine. It is.

  At demolition sites and stone quarries, crushing of concrete lumps and rocks is performed using construction machines equipped with breakers, crushers and other attachments (breakers) at the tip of the arm. When crushing concrete lumps with an attachment, a large amount of dust is generated. Therefore, the diffusion of dust is suppressed by watering the worker in the crushing region. However, this method requires a worker for watering in addition to the operator of the construction machine.

  Therefore, various devices and methods that can suppress the scattering of dust without requiring a worker to perform watering have been proposed (see, for example, Patent Document 1 and Patent Document 2). Patent Document 1 proposes an apparatus in which a watering nozzle that changes the watering direction in synchronization with the rotation of the attachment is provided at the tip of a work attachment of a construction machine. In the proposed apparatus, water is sprayed only in a narrow area near the crushing site and its vicinity. Therefore, it is not possible to suppress the diffusion of dust in the peripheral region of the crushing location that is generated by the vibration accompanying the crushing operation or the collapse of the periphery.

  Patent Document 2 proposes a dustproof device for a crusher that disperses foaming agent-mixed water in which soap and detergent are mixed in water on a crushing object and prevents dust from being scattered by bubbles. Even in this dustproof device, it is not possible to sufficiently suppress the diffusion of dust in the peripheral region of the crushing portion. Further, in this dustproof device, soap and detergents are sprayed in large quantities on the object to be crushed and the soil, which may adversely affect the quality of the object to be crushed and the soil environment.

JP 2010-46631 A JP 2000-301020 A

  An object of the present invention is to provide a dustproof watering device and method that can more reliably suppress the diffusion of dust generated when a crushing operation is performed using a construction machine.

  In order to achieve the above object, a dustproof watering device according to the present invention is the dustproof watering device provided with an attachment attached to the tip of an arm of a construction machine or a first watering means disposed in the vicinity thereof. A flexible tube having a second watering means disposed at a rear end position with respect to the longitudinal direction of the first watering means, wherein the first watering means and the second watering means have a spout at the tip. The sprinkling nozzle has a thin plate-like guide fin projecting outwardly provided integrally at the rear end of the flexible tube, and is sprayed around the first sprinkling means by the first sprinkling means. A first diffusion prevention space that is covered with water is formed, and a second diffusion prevention that is covered with water sprayed by the second watering means around the second watering means. Space is formed, the second diffusion preventing space is characterized by comprising a state of covering the first diffusion preventing space.

  The dust-sprinkling method of the present invention provides dust at the time of crushing work by providing a first watering means at or near the attachment attached to the tip of an arm of a construction machine and spraying water by the first watering means. A dust-proof sprinkling method that suppresses the diffusion of water, wherein a second watering means is provided at a position rearward of the first watering means in the longitudinal direction of the arm, and the first watering means and the second watering means are provided. The means comprises a water spray nozzle having a flexible tube having a spout at the tip, and a thin plate-like guide fin projecting outwardly provided integrally at the rear end of the flexible tube. A first diffusion prevention space covered with water is formed by spraying water around the first watering means, and the second watering means is formed around the second watering means. Te by spraying water, to form a second diffusion barrier space covered by the water, characterized in that said first diffusion preventing space covered state by the second diffusion preventing space.

  According to the dust-sprinkling water sprinkling apparatus and method of the present invention, during the crushing operation, water is sprayed by the first sprinkling means to form the first diffusion prevention space that is covered with water, so that the dust at and near the crushing location can be reduced. Scattering can be suppressed. Further, water is sprayed by the second water spraying means disposed at a position rearward of the first water spraying means with respect to the longitudinal direction of the arm, and the second diffusion prevention space covered with water covers the first diffusion prevention space. By forming in this way, it is possible to reliably suppress not only the vicinity of the crushing portion but also the diffusion of dust in the peripheral region of the crushing portion that is generated by vibration associated with the crushing operation and the surrounding collapse. Moreover, by comprising the 1st watering means and the 2nd watering means with the watering nozzle which has a flexible tube and a guide fin, water can be uniformly spread over a wide range with a comparatively small amount of water.

  In the above dustproof watering device, the second watering means is disposed, for example, at the rear end of the arm. If the spray nozzle has a rotation mechanism that can change the jet direction of the jet nozzle, the spray direction by the spray nozzle can be easily changed, so that the spray nozzle can bring it into a desired range. It becomes easy to spread water.

  In the above-described dustproof watering device, when the construction machine has a cushioning material interposed between the part where the watering nozzle is disposed and the watering nozzle, vibrations and impacts during crushing work are applied to the watering nozzle. Since it becomes difficult to transmit, the water spraying by the watering nozzle can be performed in a more stable state. Moreover, the risk of failure or damage of the watering nozzle due to vibration or impact during crushing work can be greatly reduced.

  In the dust-proof watering device, a water supply means for supplying water to the first watering means and the second watering means is a water storage tank installed in an upper rotating body of the construction machine, and the watering from the water storage tank. A supply pump that feeds water into the nozzle, a switch that is installed in the cockpit of the construction machine, and that switches on and off the water supply by the supply pump, and that supplies electric power from the construction machine to the supply pump and the switch It can also be configured with power transmission means. With this configuration, water can be sprayed without connecting a water supply hose, a power cable, or the like to the construction machine from the outside. Therefore, it is advantageous to improve the workability of the crushing work. Also, by providing a switch for switching on and off the water supply, the operator of the construction machine can quickly switch the presence or absence of watering, which is advantageous for reducing the amount of water used.

It is explanatory drawing which illustrates typically the condition which is performing the crushing operation | work with the construction machine equipped with the dustproof watering apparatus of this invention by a side view. It is explanatory drawing which illustrates the arrangement | positioning state of the dustproof watering apparatus of FIG. 1 by seeing through a part of construction machine in planar view. It is explanatory drawing which expands the 1st watering means of FIG. 1, and illustrates it by side view. It is explanatory drawing which expands and illustrates the unit comprised by one watering nozzle of FIG. 1 by side view. It is A arrow directional view of FIG. It is explanatory drawing which expands and illustrates the unit comprised by the three watering nozzles of FIG. 1 by side view. It is a B arrow view of FIG. It is explanatory drawing which illustrates the unit which provided the shock absorbing material in the side view.

  Hereinafter, the dustproof watering apparatus and method of the present invention will be described based on the embodiments shown in the drawings.

  The dust-proof watering device 1 of the present invention illustrated in FIG. 1 and FIG. 2 is used by being attached to a construction machine 20 in which an attachment 25 such as a breaker or a crusher is attached to the tip of an arm 24. The construction machine 20 used is a so-called backhoe, a power shovel or the like, and is not limited to a crawler type, and a tire type construction machine 20 may be used.

  The construction machine 20 of this embodiment has a crawler type traveling body and an upper revolving body 21 provided so as to be able to swivel with respect to the traveling body. The upper turning body 21 is provided with a cockpit 22. A boom 23 is pivotably connected to the front of the upper swing body 21, and an arm 24 is pivotally connected to the distal end side of the boom 23. A breaker is attached as an attachment 25 to the tip of the arm 24.

  The dust-proof watering device 1 includes a first watering means 2 disposed at or near the attachment 25 and a second watering means 3 disposed at a position rearward of the first watering means 2 with respect to the longitudinal direction of the arm 24. And. The dustproof watering device 1 further includes water supply means 12 for supplying water W to the first watering means 2 and the second watering means 3.

  The first watering means 2 of this embodiment is composed of four sets of units 2 a each having one watering nozzle 4. The four sets of units 2a are installed on the attachment 25 so as to surround the four sides of the crushing point CP by the attachment 25. The number and arrangement of the watering nozzles 4 constituting the first watering means 2 can be appropriately determined depending on the size of the attachment 25 and the like. The watering nozzle 4 constituting the first watering means 2 can also be arranged at the tip of the arm 24, for example.

  The second water spray means 3 includes four sets of units 3 a having one water spray nozzle 4 and four sets of units 3 b having three water spray nozzles 4. The four units 3b are installed at the rear end of the arm 24. The four sets of units 3a are installed in the middle of the arm 24 between the units 3b and 2a. Each of the units 3a and 3b is disposed on each of the four front, rear, left and right surfaces of the arm 24.

  The number and arrangement of the watering nozzles 4 constituting the second watering means 3 can be appropriately determined depending on the size of the construction machine 20 and the attachment 25 and the like. The second water sprinkling means 3 may have a configuration in which the water spray nozzles 4 are arranged in one place with respect to the longitudinal direction of the arm 24, or a structure in which the water spray nozzles 4 are arranged in a plurality of places at intervals in the longitudinal direction of the arm 24. You can also The watering nozzle 4 which comprises the 2nd watering means 3 can also be arrange | positioned at the front-end | tip part of the boom 23 etc., for example.

  As shown in FIG. 2, the water supply means 12 includes a water storage tank 13, a supply pump 14 that sends water W from the water storage tank 13 to the watering nozzle 4, and a switch that switches on and off the supply of water W by the supply pump 14. 16 and power transmission means 17 for supplying power from the construction machine 20 to the supply pump 14 and the switch 16. The water storage tank 13 and the supply pump 14 are installed on the upper swing body 21. The supply pump 14 and each watering nozzle 4 are connected by a pipe 15. The piping 15 is disposed along the hydraulic piping of the construction machine 20.

  The switch 16 is installed on a lever operated by the hand of the cockpit 22. By setting the switch 16 to ON, the water W is supplied by the supply pump 14, and the water W is sprayed from the first water spray means 2 and the second water spray means 3. When the switch 16 is switched off, the supply of water W by the supply pump 14 stops. The power transmission means 17 of this embodiment is configured to supply power from the cigar socket of the cockpit 22 to the supply pump 14 and the switch 16. The water supply means 12 may be constituted by a water supply hose or a power cable connected to the construction machine 20 from the outside. As the switch 16, for example, a push button switch, a rocker switch, a toggle switch, or the like can be adopted. The switch 16 may be a foot switch installed at the foot of the cockpit 22.

  As shown in FIG. 3, the watering nozzle 4 which comprises the 1st watering means 2 and the 2nd watering means 3 is integrally provided in the flexible tube 4a which has a spout at the front-end | tip, and the rear-end part of this flexible tube 4a. And a thin plate-like guide fin 4b protruding outward.

  The flexible tubes 4a and the guide fins 4b are formed of a soft resin, rubber, or the like and are highly flexible. The diameter of the jet outlet is, for example, about 0.2 mm to 3 mm. Considering durability and the like, it is preferable that the flexible tubes 4a and the guide fins 4b are made of silicon rubber. The outer diameter of the flexible tube 4a is, for example, about 0.5 mm to 5 mm.

  The guide fin 4b projects outward from the flexible tube 4a. The thickness of the guide fin 4b is, for example, about 2 mm to 6 mm. The guide fins 4b of this embodiment have a substantially triangular shape that tapers toward the ejection port, and are provided symmetrically about the flexible tube 4a. As the shape of the guide fin 4b, other shapes such as a rectangle can be adopted. The tips of the guide fins 4b are located in the central portion of the flexible tube 4a (in the range of about 40% to 60% of the length). A rigid tube 4c is inserted and attached to the rear end of the flexible tube 4a.

  The unit 2 a constituting the first watering means 2 has a watering nozzle 4 and an attachment / detachment part 5 that makes the watering nozzle 4 attachable / detachable to / from the construction machine 20. The detachable part 5 is composed of, for example, a magnet. The watering nozzle 4 of the unit 2a is fixed to the attaching / detaching portion 5.

  As shown in FIGS. 4 and 5, the unit 3 a constituting the second watering means includes a watering nozzle 4, a rotation mechanism 6 that can change the ejection direction of the spout of the watering nozzle 4, and the detachable unit 5. have. The rotation mechanism 6 of the unit 3a is composed of four parts: a first connection portion 7, a support shaft portion 8, a second connection portion 9, and a support portion 10.

  A first connection portion 7 is provided at the rear end portion of the watering nozzle 4, and the rear end portion of the first connection portion 7 rotates in a direction parallel to the direction in which the guide fin 4 b protrudes with respect to the support shaft portion 8. Connected as possible. Further, the tip end portion of the second connection portion 9 is joined to the support shaft portion 8. The rear end portion of the second connection portion 9 is connected to the support portion 10 so as to be rotatable in a direction orthogonal to the direction in which the guide fins 4b protrude. A detachable part 5 is provided at the rear end of the support part 10. The pipe 15 is connected to the watering nozzle 4 via the support shaft portion 8.

  In the unit 3a, by rotating the second connection portion 9 with respect to the support portion 10, the spraying direction of the watering nozzle 4 can be changed in a direction orthogonal to the direction in which the guide fins 4b protrude. Furthermore, by rotating the 1st connection part 7 with respect to the spindle part 8, it has the structure which can change the ejection direction of the water spray nozzle 4 to the direction parallel to the direction where the guide fin 4b protrudes. The rotation mechanism 6 may be configured to be rotatable only in one of a direction orthogonal to the direction in which the water spray nozzle 4 projects from the guide fin 4b or a direction parallel to the direction in which the guide fin 4b projects. it can.

  As shown in FIGS. 6 and 7, the unit 3b having the three watering nozzles 4 also has a rotating mechanism 6 and an attaching / detaching portion 5 having the same configuration as the unit 3a. However, in the unit 3 b, the three water spray nozzles 4 are connected to the support shaft portion 8 via the first connection portion 7. In this unit 3b, the ejection direction of the ejection outlets of the three water spray nozzles 4 is changed in a direction orthogonal to the direction in which the guide fins 4b project by rotating the second connection part 9 with respect to the support part 10. Can do. Further, by rotating the first connecting portions 7 of the three water spray nozzles 4 with respect to the support shaft portion 8, the jets of the three water spray nozzles 4 in a direction parallel to the direction in which the guide fins 4b protrude. It has a configuration in which the ejection direction of the outlet can be individually changed.

  Next, a method for spraying water during the crushing operation using the dustproof watering device 1 will be described.

  As shown in FIGS. 1 and 2, first, the first watering means 2, the second watering means 3, and the water supply means 12 are respectively installed at predetermined positions of the construction machine 20. The watering nozzle 4 which comprises the 1st watering means 2 installs a jet nozzle toward the crushing location CP by the attachment 25. FIG. The unit 2 a can be installed at an arbitrary position by attaching the detachable part 5 to the attachment 25.

  The second watering means 3 is installed at a position at the rear end of the first watering means 2 with respect to the longitudinal direction of the arm 24. The ejection direction of the watering nozzle 4 constituting the second watering means 3 is set toward the outside of the watering range by the first watering means 2. And the spraying direction of each watering nozzle 4 is adjusted so that the watering range of the watering nozzle 4 adjacent to the 2nd watering means 3 may overlap. The units 3 a and 3 b can be installed at arbitrary positions by attaching the detachable part 5 to the arm 24 or the boom 23. The ejection direction of each watering nozzle 4 can be set in an arbitrary direction by the rotation mechanism 6.

  The watering range by the 1st watering means 2 is set to the range of radius 50cm-about 2m from the center position of crushing location CP by the attachment 25, for example. The watering range by the 2nd watering means 3 is set to the range of about 2m-5m outside from the watering range by the 1st watering means 2, for example. The distance in the arm longitudinal direction between the first water spray means 2 and the second water spray means 3 (the distance between the closest unit 2a and the unit 3a) is, for example, 40% or more of the total length of the arm 24, more preferably 60. Set to at least%. In this embodiment, the watering range by the unit 3a is set outside the watering range by the unit 2a, and the watering range by the unit 3b is set outside the watering range by the unit 3a. Thus, the installation of the dustproof watering device 1 is completed.

  When the crushing operation is performed by the attachment 25, the first watering means 2 and the second watering means 3 are used to spray the water W around the crushing point CP and its surroundings. In this embodiment, when the operator sets the switch 16 to ON, the water W stored in the water storage tank 13 is supplied to each watering nozzle 4 through the pipe 15 by the supply pump 14. When the water W is supplied to the watering nozzle 4, the flexible tubes 4 a and the guide fins 4 b are rich in flexibility. Since the water spray nozzle 4 is provided with guide fins 4b, the circumferential rigidity of the nozzle has directionality. Therefore, the guide fin 4b swings with a larger amplitude in the direction perpendicular to the projecting direction than the projecting direction of the guide fin 4b.

  Each water spray nozzle 4 forms a curtain of water W composed of water droplets having a particle size of about raindrops by spraying water W while continuously reciprocating vertically and horizontally. A first diffusion prevention space N <b> 1 is formed around the first watering means 2 and is covered with the water W sprayed by the watering nozzle 4 of the first watering means 2. Around the second watering means 3, a second diffusion prevention space N <b> 2 is formed that is covered by the water W sprayed by the watering nozzle 4 of the second watering means 3. Then, the first diffusion prevention space N1 is covered with the second diffusion prevention space N2.

  In this embodiment, the water W curtain is formed by the unit 3a so as to cover the outside of the water W curtain formed by the unit 2a, and the unit 3b is further covered by the unit 3a so as to cover the outside of the water W curtain. A curtain of water W is formed.

  According to the present invention, since the outside of the first diffusion prevention space N1 is encased by the second diffusion prevention space N2, the water W sprayed by the first water spraying means 2 is sprayed by the second water spraying means 3. The influence of the wind is suppressed by the water W, and it is difficult for the wind to flow. Therefore, even when there is an influence of wind, the first watering means 2 can reliably spray the water W on the crushing point CP and its vicinity. Thereby, scattering of the dust in crushing location CP and its vicinity can be suppressed effectively. Further, even when dust generated from the crushing portion CP and the vicinity thereof is scattered outside the first diffusion prevention space N1, the diffusion of the dust can be reliably suppressed by the second diffusion prevention space N2.

  Further, by forming the second diffusion prevention space N2 so as to wrap around not only the vicinity of the crushing point CP but also the peripheral region of the crushing point CP, the crushing point CP generated by vibrations caused by the crushing operation or the surrounding collapse Diffusion of dust in the peripheral region of can be reliably suppressed by the second diffusion prevention space N2. Since the inside of the second diffusion prevention space N2 is not easily affected by the wind due to the water W sprayed by the second sprinkling means 3, there is a significant risk that dust generated during crushing will be swept away by the wind and diffused. Can be reduced.

  In the present invention, since the first watering means 2 and the second watering means 3 are constituted by the watering nozzles 4 having the flexible tubes 4a and the guide fins 4b, the water W is uniformly distributed over a wide range with a relatively small amount of water. can do. The amount of water W used per watering nozzle 4 is about 0.5 liters per minute. Since the water droplets sprayed by the watering nozzle 4 have a relatively large particle size, they are difficult to be swept away by the wind. Therefore, even when there is an influence of wind, the water W can be sprayed in a desired range by the watering nozzle 4.

  Since the volume of the second diffusion prevention space N2 is larger than that of the first diffusion prevention space N1, the amount of water per unit time sprayed by the second watering means 3 is larger than that of the first watering means 2. Therefore, in the case where the same specifications are used for the watering nozzles 4 used in the first watering means 2 and the second watering means 3, the number of watering nozzles 4 constituting the second watering means 3 is larger than that of the first watering means 2. To do. In addition, a watering means is not limited to 1st and 2nd like this embodiment, The specification which provided the 3 or more watering means at intervals in the longitudinal direction of the arm 24 can also be used. It is also possible to form three or more diffusion prevention spaces so as to cover the inner diffusion prevention space with the outer diffusion prevention space.

  If the sprinkling nozzle 4 is provided with the rotation mechanism 6, it is possible to easily change the ejection direction of the watering nozzle 4, so that the water W can be easily sprayed in a desired range by the watering nozzle 4. Moreover, since it becomes possible to set the ejection direction of the watering nozzle 4 to various directions, the freedom degree of the installation position of the watering nozzle 4 also becomes high.

  If the detachable part 5 is provided in the watering nozzle 4, the watering nozzle 4 can be easily installed at an arbitrary position of the construction machine 20, and therefore the labor required for installing the watering nozzle 4 can be greatly reduced. Moreover, since it becomes possible to attach the watering nozzle 4 to various construction machines 20 having different specifications, the versatility becomes very high.

  When the water supply means 12 is constituted by the water storage tank 13, the supply pump 14, the switch 16, and the power transmission means 17, the water W can be connected to the construction machine 20 without connecting a water supply hose or a power cable from the outside. It becomes possible to perform spraying. Therefore, it is advantageous to improve the workability of the crushing work. Further, by providing the switch 16 for switching on and off the supply of the water W, it is possible to frequently stop the watering when moving or turning without the need for watering. Therefore, it is advantageous to reduce the amount of water W used in the crushing operation. Moreover, by installing the switch 16 on a lever that is operated by hand, the operator of the construction machine 20 can quickly and easily switch the presence or absence of watering.

  As illustrated in FIG. 8, in the present invention, the buffer material 11 may be provided between the portion of the construction machine 20 where the watering nozzle 4 is disposed and the watering nozzle 4. The shock absorbing material 11 is comprised with the member which absorbs vibrations, such as rubber | gum and resin, for example. In the unit 3c illustrated in FIG. 8, the cushioning material 11 is provided between the second connecting portion 9 and the attaching / detaching portion 5 of the unit 3b shown in the previous embodiment. Other configurations are the same as those of the unit 3b. In addition, the buffer material 11 can also be provided, for example, between the attachment / detachment unit 5 and the construction machine 20 or between the watering nozzle 4 and the rotation mechanism 6.

  Thus, if the buffer material 11 is provided between the part where the watering nozzle 4 of the construction machine 20 is disposed and the watering nozzle 4, vibrations and impacts during crushing work are not easily transmitted to the watering nozzle 4. The spraying of the water W by the nozzle 4 can be performed in a more stable state. Moreover, the risk of the failure and damage of the watering nozzle 4 resulting from the vibration and impact at the time of crushing work can be significantly reduced by providing the buffer material 11.

  In the above-described embodiment, the case where the watering nozzle 4 is attached to the construction machine 20 by adhering the attaching / detaching portion 5 is illustrated, but the method of attaching the watering nozzle 4 is not particularly limited, and for example, the attachment 25 Alternatively, the water spray nozzle 4 may be attached to the construction machine 20 via a fitting that can be fitted on the arm 24.

DESCRIPTION OF SYMBOLS 1 Dust-proof water sprinkling device 2 1st watering means 2a Unit 3 2nd watering means 3a, 3b, 3c Unit 4 Watering nozzle 4a Flexible tube 4b Guide fin 4c Tube 5 Detachable part 6 Rotating mechanism 7 First connection part 8 Support shaft part 9 Second connection portion 10 Support portion 11 Buffer material 12 Water supply means 13 Water storage tank 14 Supply pump 15 Pipe 16 Switch 17 Power transmission means 20 Construction machine 21 Upper turning body 22 Pilot seat 23 Boom 24 Arm 25 Attachment (breaker)
W Water CP Crushing point N1 First diffusion prevention space N2 Second diffusion prevention space

Claims (6)

In the watering apparatus for dust prevention provided with the first watering means disposed in the vicinity of the attachment attached to the tip of the arm of the construction machine,
A second watering means disposed at a position rearward of the first watering means with respect to the longitudinal direction of the arm, the first watering means and the second watering means having a jet outlet at a tip; It is comprised by the watering nozzle which has a tube and the thin-plate-shaped guide fin which was provided in the back end part of this flexible tube, and was projected outside, and is spread by the said 1st watering means around the said 1st watering means. A first diffusion prevention space covered with the water sprayed is formed, and a second diffusion prevention space covered with water sprayed by the second watering means is formed around the second watering means, The dustproof watering device, wherein the second diffusion preventing space covers the first diffusion preventing space.   The dustproof watering device according to claim 1, wherein the second watering means is disposed at a rear end portion of the arm.   The water spray device for dust prevention according to claim 1 or 2, wherein the water spray nozzle has a rotation mechanism that can change a jet direction of the jet port.   The water spraying device for dust prevention according to any one of claims 1 to 3, further comprising a cushioning material interposed between the part of the construction machine where the watering nozzle is disposed and the watering nozzle.   A water supply means for supplying water to the first watering means and the second watering means; a water storage tank installed on the upper swing body of the construction machine; and a supply pump for supplying water from the water storage tank to the watering nozzle. The switch is installed in the cockpit of the construction machine and is configured to include a switch for switching on and off the water supply by the supply pump, and a power transmission means for supplying power from the construction machine to the supply pump and the switch. A dustproof watering device according to any one of claims 1 to 4. A dust-proof watering method for suppressing the diffusion of dust during crushing work by providing first watering means at or near the attachment attached to the tip of the arm of a construction machine and spraying water by the first watering means Because
A flexible tube having a second watering means at a position rearward of the first watering means with respect to the longitudinal direction of the arm, the first watering means and the second watering means having a spout at the tip; and A water spray nozzle having a thin plate-like guide fin projecting outwardly provided integrally with the rear end of the flexible tube, and spraying water around the first water spray means by the first water spray means. Forming a first diffusion prevention space covered with water, and forming a second diffusion prevention space covered with water by spraying water by the second watering means around the second watering means, A dust-sprinkling watering method, wherein the first diffusion prevention space is covered with the second diffusion prevention space.

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