JP2015090059A - Method and apparatus for preventing scattering of dust - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain premises from getting dirty and suppress outward discharge of dust scattering into the air.SOLUTION: A method for preventing scattering of dust is characterized in that water is sprayed like a mist obliquely upward on the side of premises of a business place from above an enclosure provided to partition the premises and the outside.

Description

  The present invention relates to a technique for preventing dust from being scattered at a business site such as a construction site.

  In establishments such as construction sites, dust may be scattered along with work. As a technique for preventing the scattering of dust, it has been proposed to wet the dust generation source or the entire field with water by spraying water in the field or spraying it in the form of a mist (for example, Patent Document 1). ).

Japanese Patent No. 3840174

  In the method in which the dust generation source or the entire field is wetted with water, a walking path such as the ground or a passage in the field may be wetted with water, and a puddle may be generated. When an operator walks, mud adheres to the footwear, and this may be brought into the building or office and the building or office may become dirty. In addition, the water adhering to the wall surface of the building may become dirty and stains that are difficult to clean, and is particularly noticeable in the case of a newly built building.

  As described above, in a method in which the dust generation source or the entire inside of the place is wetted with water, the inside of the place may become dirty. In addition, it is impossible to prevent dust scattered in the air from getting out of the air.

  An object of the present invention is to prevent the inside of the field from becoming dirty and to prevent dust scattered in the air from coming out.

  According to the present invention, for example, water is sprayed in the form of a mist obliquely upward inside the field from the upper part of the enclosure provided for partitioning the inside and outside of the business site. A method is provided.

  ADVANTAGE OF THE INVENTION According to this invention, it can suppress that the inside of a field gets dirty and the dust scattered in the air comes out outside.

(A) is a top view which shows the example of the establishment which can implement this invention, (B) is a figure which shows the example of spraying of water. Part drawing of a scattering prevention device. (A) is an external view of a mounting bracket, (B) is an explanatory view of an example of using the mounting bracket. Explanatory drawing of dust scattering prevention. (A) is a figure which shows the example of installation of a net, (B) is explanatory drawing of the reduction effect of the wind by a net.

  FIG. 1A is a plan view showing an example of a business office that can implement the present invention. Examples of business establishments include construction sites, waste disposal facilities, production facilities performing polishing operations, and woodworking locations where dust is generated. In the case of the present embodiment, a construction site is assumed as the establishment. The office 100 and the outside 200 are partitioned by an enclosure 1. In the present embodiment, the enclosure 1 is assumed to be a temporary enclosure.

  A gate G that can be opened and closed is provided in the middle of the enclosure 1 and can enter and exit the hall 100 from the outside 200. In the hall 100, for example, various works such as dismantling of existing structures and new construction of structures are performed. Here, the shape of the enclosure 1 in a plan view is a square here, but it is an appropriate shape according to the site shape of the hall 100, and gates G can be provided at a plurality of locations.

  The enclosure 1 is provided with a scattering prevention device 2 provided with nozzles N1 and N2 that spray water in a mist form, and prevents dust generated in the field 100 from scattering to the outside 200. FIG. 1B is a diagram showing an example of spraying water by the nozzles N1 and N2, and is a partial perspective view of the enclosure 1 as seen from the inside 100 side.

  The enclosure 1 includes a plurality of panels 10 and a frame body 11 that supports the plurality of panels 10 in a vertical posture in a planar manner. The frame 11 is configured by combining rods 12 to 17 such as steel pipes. The bar 12 extends in the horizontal direction and is fixed to the panel 10. The bar-shaped member 12 is provided in a plurality of stages (here, three stages) in the vertical direction. The bar 13 extends in the vertical direction and is fixed to the bar 12. A plurality of bar members 12 are provided in the horizontal direction. The bar 15 extends in the horizontal direction so as to be orthogonal to the bars 12 and 13 and is fixed to the bottom bar 12 and the bar 13. A plurality of bar members 15 are provided spaced apart in the horizontal direction. The bar 17 is provided to extend in the horizontal direction in parallel with the bar 12 and is fixed to the end of the bar 15. The bar 14 is disposed obliquely and fixed to the bars 13 and 15. The bar 17 extends in the vertical direction and is fixed to the bars 14 and 15. The lower ends of the bars 13 and 17 are buried in the ground.

  The enclosure 1 is provided with a scattering prevention device 2. The scattering prevention device 2 includes a supply pipe T and a plurality of spraying units 20. The supply pipe T extends in the horizontal direction along the upper inner surface of the panel 10 of the enclosure 1, and supplies water to the spray unit 20. The spray unit 20 is provided at a plurality of locations of the supply pipe T and branches from the supply pipe T. The spraying unit 20 sprays the water supplied from the supply pipe T in a mist state obliquely upward on the site 100 side. The diameter of the water droplet to be sprayed is, for example, several μ to several tens μ.

  In the case of this embodiment, two types of spraying parts 20 are provided. The spray unit 20 including the nozzle N1 has a short distance from the supply pipe T to the nozzle N1. In the spray unit 20 including the nozzle N2, the pipe 221 is interposed between the supply pipe T and the nozzle N2, and the distance from the supply pipe T to the nozzle N2 is set to be long. The nozzle N1 sprays mist M1 at a relatively low position and on the side of the enclosure 1, and the nozzle N2 sprays mist M2 at a relatively high position and on the side of the field 100. In this way, the mist can be sprayed in a wider range above the enclosure 1 by changing the spray position of the mist.

  In the case of this embodiment, although the spraying part 20 provided with the nozzle N1 and the spraying part 20 provided with the nozzle N2 are arrange | positioned alternately, it is not restricted to this, The one spraying part 20 is placed every two or every three. It is also possible to arrange. Moreover, the spray position of the mist is not limited to two types, and may be three or more types, whereby the mist can be sprayed in a wider range. Conversely, the mist spraying position may be one type.

  As already described, in the case of this embodiment, the enclosure 1 is a temporary enclosure and is removed after the construction is completed. The installation length and shape of the enclosure 1 vary depending on the construction site. Therefore, it is preferable that the anti-scattering device 2 can be easily installed and the adjustment of the total length and the like are simple. Therefore, in the present embodiment, the scattering prevention device 2 is composed of a plurality of units. FIG. 2 is a component diagram of the scattering prevention device 2 and shows the units 21 to 25. The scattering prevention device 2 can be configured by combining the units 21 to 25.

  The unit 21 is a unit constituting the spray unit 20 including the nozzle N1, and includes a supply pipe T, a T-shaped joint TJ connected to one end thereof, and a nozzle N1 connected to the joint TJ. . The joint portion TJ includes three connection portions, and one connection portion is not connected. The unit 22 is a unit constituting the spray unit 20 including the nozzle N2, and is connected to the supply pipe T, the joint part TJ connected to one end thereof, the pipe 221 connected to the joint part TJ, and the tip of the pipe 221. And a connected nozzle N2.

  The unit 23 is a unit constituting the spray unit 20 including the nozzle N1, and includes a supply pipe T, an L-shaped joint portion LJ connected to one end thereof, and a nozzle N1 connected to the joint portion LJ. . The joint portion LJ includes two connection portions. The unit 23 constitutes a terminal portion of the supply pipe T. The unit 24 is a unit constituting the spray unit 20 including the nozzle N1, and includes the supply pipe T, the joint part TJ connected to one end thereof, the nozzle N1 connected to the joint part TJ, and the supply pipe T. And a joint portion LJ connected to the end. One connecting portion of the joint portion TJ is not connected. The unit 24 constitutes a starting end portion of the supply pipe T.

  The unit 25 is a valve unit with a strainer, and includes a connection part 251 connected to the joint part TJ of the unit 24, a connection part 252 to which a hose from a water source such as a pump or a faucet is connected, and a valve 253. . By opening the valve 253, water flows from the connecting portion 252 to the connecting portion 251, and water can be shut off when the valve 253 is closed.

  As shown in FIGS. 1 (A) and 1 (B), when the spray unit 20 including the nozzle N1 and the spray unit 20 including the nozzle N2 are alternately arranged, the unit 21 and the unit 22 corresponding to the required total length are arranged. Connect alternately. At the time of connection, the end E of the supply pipe T is simply connected to the unconnected connection of the joint TJ. The unit 23 is connected at the end of the supply pipe T. When changing the total length or when changing the arrangement mode of the nozzles N1 and N2, it is possible to flexibly cope by simply changing the connection mode and the number of connections between the units.

  At the starting end of the supply pipe T, the unit 24 is connected, and further, the connection part 251 of the unit 25 is connected to the joint part LJ of the unit 24. The scattering prevention device 2 assembled in this way is fixed to the upper part of the panel 10, for example. A simple fixing method is preferable, and for example, a mounting bracket 26 shown in FIG. 3A is used. FIG. 3B shows an example of using the mounting bracket 26.

  The mounting bracket 26 includes a main body portion 261 formed by bending a metal plate into an inverted U shape, a fastener 262 screwed to the main body portion 261, and a clip 263 fixed to the main body portion 261. . The fastener 262 includes a screw shaft 262a that is screwed into a screw hole 261a that is formed in an inverted U-shaped piece of the main body 261. The main body 261 is attached to the panel 10 so as to cover the upper end of the panel 10. By tightening the screw shaft 262a of the fastener 262 in the screw hole 261a, the tip of the screw shaft 262a comes into contact with the surface of the panel 10, and the mounting bracket 26 is fixed to the panel 10.

  The clip 263 is fixed to the other piece of the inverted U shape of the main body portion 261 with a screw 264. The clip 263 has arcuate engagement pieces 263a and 263b. By engaging the engagement pieces 263a and 263b with a part of the anti-scattering device 2 (the joint portion TJ in the example of FIG. 3B) sandwiched between the engagement pieces 263a and 263b, The prevention device 2 is locked to each other.

  At a plurality of locations in the longitudinal direction of the supply pipe T, the anti-scattering device 2 is compared by locking the anti-scattering device 2 in advance and fixing the anti-scattering device 26 to the upper end of the panel 10. The panel 10 can be easily installed. Thereafter, when a water source hose is connected to the connecting portion 252 of the unit 25, the mist can be sprayed. The amount of water spray can be adjusted by adjusting the opening of the valve 253 or adjusting the water pressure of the water source.

  Next, a principle capable of preventing dust from scattering to the outside 200 will be described with reference to FIG. As shown in the figure, mist M1 and mist M2 are sprayed obliquely upward from the top of the enclosure 1 (panel 10) from the nozzles N1 and N2 on the field 100 side. When the spray direction is indicated by an angle θ from the vertical direction, 0 <θ <90 degrees, and preferably 45 degrees ≦ θ ≦ 75 degrees, for example. The direction of spraying may be different between the nozzle N1 and the nozzle N2.

  A mist curtain M is formed inside the upper portion of the panel 10 by spraying the mist M1 and mist M2, and the mist curtain M has a property of descending as shown by an arrow d1. Therefore, in a situation where dust P riding on the airflow from the field 100 flows out to the outside 200 of the enclosure 1, it is promoted that water droplets of the mist curtain M adhere to the dust P and the dusts aggregate and fall into the field 100. Is done. As a result, the amount of dust flowing out from the enclosure 1 to the outside 200 can be greatly reduced.

  Since the scattering prevention principle is like this, there is no need to wet the inside 100. The amount of water sprayed can be adjusted preferably so that water does not accumulate in the site 100, and more preferably, the site 100 does not get wet. Since the mist curtain M evaporates as it descends, wetting in the field 100 is also suppressed by this evaporation. In this manner, dust can be prevented from scattering to the outside 200 without wetting the inside 100, so that the inside of the place is also prevented from being soiled.

  When the wind is strong, the mist curtain M may be swept away by the wind. Therefore, a belt-like net along the enclosure 1 may be installed above the enclosure 1. FIGS. 5A and 5B show an example.

  The net 3 is disposed outside the panel 10 (external 200 side) and is supported by a pole (not shown) or the like. In the example of the figure, the net 3 is installed only at the upper part of the enclosure 1 and above it, but it may be arranged from above the enclosure 1 over the ground. The net 3 may be made of resin or metal.

  By installing the net 3, even if a strong cross wind is blowing as shown by the arrow d2, the momentum of the cross wind can be weakened as shown by the arrow d3 on the site 100 side of the net 3. Accordingly, the downward flow of the mist curtain M described with reference to FIG. 4 can be maintained, and a large amount of excess mist can be prevented from leaking to the outside 200. It is conceivable that the cross wind is blocked by a non-breathable panel instead of the net 3, but the cross wind creates an updraft on the non-breathable panel and gets over the panel together with dust. It is thought that the dust scattering prevention effect is inferior to the installation of a certain member.

Claims (6)

From the upper part of the enclosure provided to partition the inside and outside of the workplace, water is sprayed in the form of a mist obliquely upward inside the venue.
A method for preventing dust scattering. A dust scattering prevention method according to claim 1,
Adjust the amount of water spray so that no puddles form in the place,
A method for preventing dust scattering. A dust scattering prevention method according to claim 1 or 2,
Water is sprayed in a mist form obliquely upward inside the field from a nozzle disposed at a location where the distance from the enclosure is the first distance, and the distance from the enclosure is longer than the first distance. Spraying water in a mist-like manner obliquely upward on the inside of the field from a nozzle arranged at a location that is a distance of 2.
A method for preventing dust scattering. A dust scattering prevention method according to any one of claims 1 to 3,
Above the enclosure, a belt-like net is installed along the enclosure.
A method for preventing dust scattering. A dust scattering prevention device installed in an enclosure provided to separate the inside and outside of a business site,
A water supply pipe extending horizontally along the inside of the upper part of the enclosure;
A plurality of spraying parts that branch from the supply pipe at a plurality of locations of the supply pipe and spray water in a mist form obliquely upward inside the field,
An apparatus for preventing dust scattering. The dust scattering prevention device according to claim 5,
The plurality of spraying parts are:
Including a spraying portion having a different length from the supply pipe to the nozzle,
An apparatus for preventing dust scattering.

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