JP6781081B2 - Dustproof sprinklers and methods - Google Patents

Description

The present invention relates to a dust-proof sprinkler and method, and more particularly to a dust-proof sprinkler and method capable of more reliably suppressing the diffusion of dust generated when performing a crushing operation using a construction machine. Is.

At demolition sites and stone quarries, construction machines equipped with attachments (crushers) such as breakers and crushers are used at the tips of the arms to crush concrete blocks and rocks. When crushing a concrete block with an attachment, a large amount of dust is generated. Therefore, the worker sprinkles water on the crushed area to suppress the diffusion of dust. However, this method requires a worker to sprinkle water in addition to the operator of the construction machine.

Therefore, various devices and methods capable of suppressing the scattering of dust without the need for a worker for watering have been proposed (see, for example, Patent Document 1 and Patent Document 2). Patent Document 1 proposes a device provided with a watering nozzle at the tip of a work attachment of a construction machine, which changes the watering direction in synchronization with the rotation of the attachment. With this proposed device, water is only sprinkled over a narrow area at or near the crush site. Therefore, it is not possible to suppress the diffusion of dust in the peripheral region of the crushed portion generated by the vibration caused by the crushing work and the collapse of the surrounding area.

Patent Document 2 proposes a dustproof device for a crushing work machine in which water mixed with a foaming agent in which soap or detergent is mixed in water is sprayed on a crushed object to prevent dust from being scattered by bubbles. Even with this dustproof device, it is not possible to sufficiently suppress the diffusion of dust in the region around the crushed portion. Further, in this dustproof device, a large amount of soap and detergents are sprayed on the crushed object and the soil, which may adversely affect the quality of the crushed object and the soil environment.

Japanese Unexamined Patent Publication No. 2010-46631 Japanese Unexamined Patent Publication No. 2000-301020

An object of the present invention is to provide a dust-proof sprinkler and a method capable of more reliably suppressing the diffusion of dust generated when performing a crushing operation using a construction machine.

In order to achieve the above object, the dust-proof watering device of the present invention is a dust-proof watering device provided with a first watering means arranged at or near an attachment attached to the tip of an arm of a construction machine. A flexible tube having a second watering means arranged at a position rearward from the first watering means in the longitudinal direction of the above, and the first watering means and the second watering means having a spout at the tip thereof. It is composed of a watering nozzle having a thin plate-shaped guide fin integrally provided at the rear end portion of the flexible tube, and is sprayed around the first watering means by the first watering means. The first diffusion prevention space covered with water is formed, and the second diffusion prevention space covered with the water sprayed by the second watering means is formed around the second watering means. 2. The diffusion prevention space is characterized in that it covers the first diffusion prevention space.

In the dust-proof watering method of the present invention, a first watering means is provided at or near an attachment attached to the tip of an arm of a construction machine, and water is sprayed by the first watering means to cause dust during crushing work. This is a dust-proof watering method for suppressing the diffusion of water, wherein a second watering means is provided at a position rearward from 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 is composed of a watering nozzle having a flexible tube having a spout at the tip and a thin plate-shaped guide fin integrally provided at the rear end of the flexible tube, and the first watering means. Water is formed by spraying water around the first watering means to form a first diffusion prevention space covered with water, and water is sprayed around the second watering means by the second watering means. It is characterized in that a second diffusion prevention space is formed and the first diffusion prevention space is covered with the second diffusion prevention space.

According to the dust-proof sprinkler and method of the present invention, during the crushing operation, water is sprayed by the first sprinkling means to form a first diffusion prevention space covered with water, so that the dust in the crushed portion and its vicinity can be separated. Scattering can be suppressed. Further, water is sprayed by a second sprinkling means arranged at a position rearward from the first sprinkling means in 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 the diffusion of dust not only in the vicinity of the crushed portion but also in the peripheral region of the crushed portion generated by vibration due to the crushing operation and collapse of the surrounding area. Further, by configuring the first watering means and the second watering means with a watering nozzle having a flexible tube and a guide fin, water can be evenly sprayed over a wide range with a relatively small amount of water.

In the above dustproof sprinkler device, the second sprinkler means is arranged, for example, at the rear end of the arm. If the watering nozzle has a rotating mechanism that can change the ejection direction of the ejection port, the ejection direction of the watering nozzle can be easily changed. Therefore, the watering nozzle can be used to obtain a desired range. It becomes easier to spray water.

If the above-mentioned dust-proof watering device has a structure having a cushioning material interposed between the portion of the construction machine where the watering nozzle is arranged and the watering nozzle, vibration or impact during crushing work is applied to the watering nozzle. Since it is difficult to transmit water, water can be sprayed by the watering nozzle in a more stable state. In addition, the risk of watering nozzle failure or damage due to vibration or impact during crushing work can be significantly reduced.

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

It is explanatory drawing which schematically exemplifies the situation which the crushing work is performed by the construction machine equipped with the sprinkler for dust prevention of this invention from the side view. It is explanatory drawing which illustrates the arrangement state of the dustproof sprinkler of FIG. 1 in a plan view through a part of a construction machine. It is explanatory drawing which expands and illustrates the 1st watering means of FIG. 1 from the side view. It is explanatory drawing which expands and illustrates the unit composed of one watering nozzle of FIG. 1 from the side view. It is a view of arrow A of FIG. It is explanatory drawing which expands and illustrates the unit composed of three watering nozzles of FIG. 1 from the side view. It is a B arrow view of FIG. It is explanatory drawing which illustrates the unit provided with the cushioning material from the side view.

Hereinafter, the dustproof sprinkler and method of the present invention will be described based on the embodiment shown in the figure.

The dustproof sprinkler device 1 of the present invention illustrated in FIGS. 1 and 2 is used by being attached to a construction machine 20 having an attachment 25 such as a breaker or a crusher attached to the tip of the arm 24. The construction machine 20 used is a so-called backhoe, a power shovel, or the like, and not only a crawler type but also 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 rotating body 21 provided so as to be rotatable with respect to the traveling body. The upper swivel body 21 is provided with a driver's seat 22. The boom 23 is rotatably connected to the front of the upper swing body 21, and the arm 24 is rotatably connected to the tip end side of the boom 23. A breaker is attached to the tip of the arm 24 as an attachment 25.

The dustproof sprinkling device 1 includes a first sprinkling means 2 arranged at or near the attachment 25 and a second sprinkling means 3 arranged at a position rearward of the first sprinkling means 2 in the longitudinal direction of the arm 24. And have. The dustproof sprinkler device 1 further includes a water supply means 12 for supplying water W to the first sprinkler means 2 and the second sprinkler means 3.

The first watering means 2 of this embodiment is composed of four sets of units 2a having one watering nozzle 4. The four sets of units 2a are installed in the attachment 25 so as to surround the four sides of the crushed portion 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 may be arranged at the tip of the arm 24, for example.

The second watering means 3 is composed of four sets of units 3a having one watering nozzle 4 and four sets of units 3b having three watering nozzles 4. The four sets of 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 unit 3b and the unit 2a. One set of units 3a and 3b is arranged on each of the front, rear, left, and right sides 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 watering means 3 may have the watering nozzles 4 arranged at one place in the longitudinal direction of the arm 24, or the watering nozzles 4 may be arranged at a plurality of places at intervals in the longitudinal direction of the arm 24. You can also do it. The watering nozzle 4 constituting the second watering means 3 may be arranged at the tip of the boom 23, 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 the supply of water W by the supply pump 14 on and off. It is composed of 16 and a power transmitting means 17 that supplies 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 pipe 15 is arranged along the hydraulic pipe of the construction machine 20.

The switch 16 is installed on a lever operated by the hand of the driver's seat 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 sprinkling means 2 and the second sprinkling means 3, respectively. When the switch 16 is switched off, the supply of water W by the supply pump 14 is stopped. The power transmission means 17 of this embodiment is configured to supply electric 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 composed of 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 can also be a foot switch installed at the foot of the cockpit 22.

As shown in FIG. 3, the watering nozzles 4 constituting the first watering means 2 and the second watering means 3 are integrally provided with the flexible tube 4a having a spout at the tip and the rear end portion of the flexible tube 4a. It has a thin plate-shaped guide fin 4b that projects outward.

The flexible tube 4a and the guide fin 4b are made of a soft resin, rubber, or the like and are highly flexible. The diameter of the spout is, for example, about 0.2 mm to 3 mm. Considering durability and the like, the flexible tube 4a and the guide fin 4b are preferably formed of silicon rubber. The outer diameter of the flexible tube 4a is, for example, about 0.5 mm to 5 mm.

The guide fins 4b project 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 spout, and two guide fins 4b are provided symmetrically about the flexible tube 4a. The shape of the guide fin 4b may be another shape such as a rectangle. The tip of the guide fin 4b is located at the central portion of the length of the flexible tube 4a (range of about 40% to 60% of the length). A rigid tube body 4c is inserted and attached to the rear end portion of the flexible tube 4a.

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

As shown in FIGS. 4 and 5, the unit 3a constituting the second watering means includes a watering nozzle 4, a rotating mechanism 6 capable of changing the ejection direction of the ejection port of the watering nozzle 4, and a detachable portion 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 projecting direction of the guide fin 4b with respect to the support shaft portion 8. It is connected as possible. The tip of the second connecting portion 9 is further joined to the supporting shaft portion 8. The rear end portion of the second connecting portion 9 is rotatably connected to the supporting portion 10 in a direction orthogonal to the projecting direction of the guide fin 4b. A detachable portion 5 is provided at the rear end portion of the support portion 10. The pipe 15 is connected to the watering nozzle 4 via the support shaft portion 8.

In the unit 3a, the ejection direction of the watering nozzle 4 can be changed in a direction orthogonal to the projecting direction of the guide fin 4b by rotating the second connecting portion 9 with respect to the support portion 10. Further, by rotating the first connecting portion 7 with respect to the support shaft portion 8, the ejection direction of the watering nozzle 4 can be changed in a direction parallel to the projecting direction of the guide fin 4b. The rotating mechanism 6 may be configured so that the watering nozzle 4 can rotate only in either the direction orthogonal to the projecting direction of the guide fin 4b or the direction parallel to the projecting direction of the guide fin 4b. it can.

As shown in FIGS. 6 and 7, the unit 3b having the three watering nozzles 4 also has the rotation mechanism 6 and the attachment / detachment portion 5 having the same configuration as the unit 3a. However, in the unit 3b, three watering nozzles 4 are connected to the support shaft portion 8 via the first connecting portion 7. In this unit 3b, by rotating the second connecting portion 9 with respect to the support portion 10, the ejection directions of the ejection ports of the three watering nozzles 4 are changed in the direction orthogonal to the projecting direction of the guide fins 4b. Can be done. Further, by rotating the first connection portion 7 of each of the three watering nozzles 4 with respect to the support shaft portion 8, the three watering nozzles 4 are ejected in a direction parallel to the projecting direction of the guide fins 4b. The configuration is such that the outlet direction can be changed individually.

Next, a method of sprinkling water during the crushing operation using this dustproof sprinkler 1 will be described.

As shown in FIGS. 1 and 2, first, the first sprinkling means 2, the second sprinkling means 3, and the water supply means 12 are installed at predetermined positions of the construction machine 20, respectively. The watering nozzle 4 constituting the first watering means 2 is installed so that the spout is directed toward the crushed portion CP by the attachment 25. The unit 2a can be installed at an arbitrary position by attaching the attachment / detachment portion 5 to the attachment 25.

The second sprinkling means 3 is installed at a position at the rear end of the first sprinkling means 2 with respect to the longitudinal direction of the arm 24. The ejection direction of the watering nozzles 4 constituting the second watering means 3 is set toward the outside of the watering range by the first watering means 2. Then, the ejection directions of the watering nozzles 4 are adjusted so that the watering ranges of the adjacent watering nozzles 4 of the second watering means 3 overlap. The units 3a and 3b can be installed at arbitrary positions by attaching the attachment / detachment portion 5 to the arm 24 or the boom 23. The ejection direction of each watering nozzle 4 can be set to an arbitrary direction by the rotating mechanism 6.

The watering range by the first watering means 2 is set to, for example, a radius of about 50 cm to 2 m from the center position of the crushed portion CP by the attachment 25. The watering range by the second watering means 3 is set to, for example, a range of about 2 m to 5 m outward from the watering range by the first watering means 2. The distance between the first sprinkling means 2 and the second sprinkling means 3 in the longitudinal direction of the arm (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% or more. 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. With the above, the installation of the dustproof sprinkler 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 water W on the crushed portion CP and its surroundings. In this embodiment, when the operator sets the switch 16 to ON, the water W contained in the water storage tank 13 is supplied to the respective watering nozzles 4 through the pipe 15 by the supply pump 14. When the water W is supplied to the watering nozzle 4, the flexible tube 4a and the guide fins 4b are highly flexible, so that the watering nozzle 4 sprays the water W while swinging up, down, left and right by the jet flow of the water W. Since the watering nozzle 4 is provided with the guide fins 4b, the circumferential rigidity of the nozzle is directional. Therefore, the guide fin 4b swings with a larger amplitude in the direction orthogonal to the overhanging direction than the overhanging direction.

Each watering nozzle 4 sprays water W while continuously reciprocating up, down, left and right to form a curtain of water W composed of water droplets having a particle size of about raindrops. Then, a first diffusion prevention space N1 covered with the water W sprayed by the watering nozzle 4 of the first watering means 2 is formed around the first watering means 2. A second diffusion prevention space N2 covered with water W sprayed by the watering nozzle 4 of the second watering means 3 is formed around 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 formed by the unit 3a is formed so as to cover the outside of the water W curtain formed by the unit 2a, and the unit 3b is further covered outside the water W curtain formed by the unit 3a. A curtain of water W is formed by.

According to the present invention, the outside of the first diffusion prevention space N1 is surrounded by the second diffusion prevention space N2, so that the water W sprayed by the first watering means 2 is sprayed by the second watering means 3. The influence of the wind is suppressed by the water W, which makes it difficult to be swept away by the wind. Therefore, even when there is an influence of wind, the water W can be reliably sprayed on the crushed portion CP and its vicinity by the first sprinkling means 2. As a result, it is possible to effectively suppress the scattering of dust in the crushed portion CP and its vicinity. Further, even when the dust generated from the crushed portion CP and its vicinity is scattered to the outside of 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 not only in the vicinity of the crushed portion CP but also in the peripheral region of the crushed portion CP, the crushed portion CP generated due to vibration due to the crushing work or collapse of the surroundings is formed. The diffusion of dust in the peripheral region of the above can also be reliably suppressed by the second diffusion prevention space N2. Since the inside of the second diffusion prevention space N2 is less likely to be affected by the wind due to the water W sprayed by the second watering means 3, there is a great risk that the dust generated during crushing will be washed away by the wind and diffused. Can be reduced to.

In the present invention, since the first watering means 2 and the second watering means 3 are composed of a watering nozzle 4 having a flexible tube 4a and a guide fin 4b, the water W is evenly sprayed 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 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 sprayed by the second watering means 3 is larger than that of the first watering means 2. Therefore, when the watering nozzles 4 used by the first watering means 2 and the second watering means 3 have the same specifications, the number of watering nozzles 4 constituting the second watering means 3 is larger than that of the first watering means 2. To do. The watering means is not limited to the first and the second as in this embodiment, and the specifications may be such that three or more watering means are provided at intervals in the longitudinal direction of the arm 24. Then, three or more diffusion prevention spaces can be formed so that the inner diffusion prevention space is covered by the outer diffusion prevention space.

When the rotating mechanism 6 is provided in the watering nozzle 4, the ejection direction of the watering nozzle 4 can be easily changed, so that the water W can be easily sprayed in a desired range by the watering nozzle 4. Further, since the ejection direction of the watering nozzle 4 can be set in various directions, the degree of freedom in the installation position of the watering nozzle 4 is increased.

When the watering nozzle 4 is provided with the attachment / detachment portion 5, the watering nozzle 4 can be easily installed at an arbitrary position of the construction machine 20, so that the labor required for the installation work of the watering nozzle 4 can be significantly reduced. Further, since the watering nozzle 4 can be attached to various construction machines 20 having different specifications, the versatility is very high.

When the water supply means 12 includes a water storage tank 13, a supply pump 14, a switch 16, and a power transmission means 17, the water W can be connected to the construction machine 20 without connecting a water supply hose, a power cable, or the like from the outside. Can be sprayed. Therefore, it is advantageous for improving the workability of the crushing work. Further, by providing the switch 16 for switching the supply of water W on and off, it is possible to frequently stop water sprinkling during movement or turning when water sprinkling is unnecessary. Therefore, it is advantageous to reduce the amount of water W used in the crushing operation. Further, by installing the switch 16 on a lever operated by hand, the operator of the construction machine 20 can quickly and easily switch between the presence and absence of watering.

As illustrated in FIG. 8, in the present invention, the cushioning material 11 may be provided between the portion where the watering nozzle 4 of the construction machine 20 is arranged and the watering nozzle 4. The cushioning material 11 is composed of, for example, a member that absorbs vibrations such as rubber and resin. In the unit 3c illustrated in FIG. 8, a cushioning material 11 is provided between the second connecting portion 9 and the detachable portion 5 of the unit 3b shown in the previous embodiment. Other configurations are the same as those of the unit 3b. The cushioning material 11 may also be provided, for example, between the attachment / detachment portion 5 and the construction machine 20, or between the watering nozzle 4 and the rotation mechanism 6.

In this way, if the cushioning material 11 is provided between the portion where the watering nozzle 4 of the construction machine 20 is arranged and the watering nozzle 4, vibration and impact during the crushing work are not easily transmitted to the watering nozzle 4, so that the watering nozzle 4 is not easily transmitted. The water W can be sprayed by the nozzle 4 in a more stable state. Further, by providing the cushioning material 11, the risk of failure or damage of the watering nozzle 4 due to vibration or impact during the crushing operation can be significantly reduced.

In the above-described embodiment, the case where the watering nozzle 4 is attached to the construction machine 20 by adhering the detachable portion 5 is illustrated, but the attachment method of the watering nozzle 4 is not particularly limited, and for example, the attachment 25 The watering nozzle 4 can be attached to the construction machine 20 via a metal fitting or the like that can be externally fitted to the arm 24.

1 Dustproof watering 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 Pipe body 5 Detachable part 6 Rotating mechanism 7 1st connection part 8 Support shaft part 9 Second connection part 10 Support part 11 Cushioning material 12 Water supply means 13 Water storage tank 14 Supply pump 15 Piping 16 Switch 17 Transmission means 20 Construction machinery 21 Upper swivel body 22 Driver's seat 23 Boom 24 Arm 25 Attachment (breaker)
W Water CP crushing point N1 1st diffusion prevention space N2 2nd diffusion prevention space

Claims (6)

In a dustproof sprinkler device equipped with a first sprinkling means arranged at or near an attachment attached to the tip of an arm of a construction machine.
A flexible second watering means arranged at a position rearward from the first watering means with respect to the longitudinal direction of the arm, and the first watering means and the second watering means have a spout at the tip. It is composed of a watering nozzle having a tube and a thin plate-shaped guide fin integrally provided at the rear end of the flexible tube, and is sprayed around the first watering means by the first watering means. A first diffusion prevention space covered with the water is formed, and a second diffusion prevention space covered with the water sprayed by the second watering means is formed around the second watering means. A dustproof watering device, characterized in that the second diffusion prevention space covers the first diffusion prevention space. The dust-proof sprinkler according to claim 1, wherein the second sprinkler means is arranged at the rear end of the arm. The dust-proof watering device according to claim 1 or 2, wherein the watering nozzle has a rotating mechanism capable of changing the ejection direction of the ejection port. The dust-proof watering device according to any one of claims 1 to 3, which has a cushioning material interposed between a portion of the construction machine where the watering nozzle is arranged and the watering nozzle. The water supply means for supplying water to the first watering means and the second watering means includes a water storage tank installed in the upper swivel body of the construction machine and a supply pump for feeding water from the water storage tank to the watering nozzle. A switch installed in the cockpit of the construction machine to switch the water supply on and off by the supply pump, and a power transmitting means for supplying power from the construction machine to the supply pump and the switch. The dustproof watering device according to any one of claims 1 to 4. A dust-proof watering method that suppresses the diffusion of dust during crushing work by providing a 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. And
A flexible tube having a second watering means provided at a position rearward from the first watering means in the longitudinal direction of the arm and having the first watering means and the second watering means at the tip thereof, and the flexible tube. It is composed of a watering nozzle having a thin plate-shaped guide fin integrally provided at the rear end of the flexible tube, and water is sprayed around the first watering means by the first watering means. A first diffusion prevention space covered with water is formed, and water is sprayed around the second watering means by the second watering means to form a second diffusion prevention space covered with water. A dustproof watering method, characterized in that the first diffusion prevention space is covered with the second diffusion prevention space.

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