JP2008127804A - Spray cooling system and spray cooling method for construction site - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spray cooling system for a construction site inexpensively and easily usable at the construction site by using a water service. <P>SOLUTION: This spray cooling system for lowering the temperature of a well 103 at the construction site comprises a spray nozzle 2, a water service 3, and pipelines 4 connecting them to each other. A tap water is sprayed from the spray nozzle 2 at the hydraulic pressure of the water service 3. Since the spray cooling system is formed of the spray nozzle 2, the pipelines 4, and the water service 3, an extremely simple and inexpensive spray cooling system can be provided, and an efficiency for improving the working environment by cooling can be improved. Also, since the system does not need to be directly coupled to the water service 3 for reserving water, it does not need facilities such as a water storage tank and a booster pump therebetween. Consequently, the weight of the system can be reduced, easily installed, moved, and dismantled, and suitably used as a temporary facility at the construction site. In addition, the system does no produce surplus water and loss of water reserving time and the installation space for the facilities. The energy of the water service is not reduced since the hydraulic pressure of the water service 3 is utilized. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a spray cooling system and a spray cooling method for cooling a work space at a construction site.

  Conventionally, as this kind, a vaporization heat cooling system (for example, Patent Document 1) that stores primary water or groundwater in a water supply in a reservoir and sprays the accumulated water on the outer wall surface of a building or the entire surface of a roofing material is proposed. Has been.

  Moreover, the spray system (for example, patent document 2) which pressurizes the water supplied from the water supply with a pressurized water supply apparatus, and sprays it as a mist from a spray nozzle is proposed.

  Furthermore, a spray type cooler (for example, Patent Document 3) in which a spray nozzle is provided on the outer periphery of the exhaust side of the blower and a water pipe and an air pipe are connected to the spray nozzle has been proposed.

On the other hand, as a construction site, a construction site environment improvement system (for example, Patent Document 4) has been proposed in which a spray is diffused by a spray device and a blower to cool a target space at a construction site provided with a temporary roof.
JP 2006-138511 A JP 2006-177575 A Utility Model Registration No. 3011640 JP 2004-124419 A

  In Patent Document 1, tap water is stored in a water tank and then pressurized using a pump. In Patent Document 2, water supplied from the water is pressurized by a pressurized water supply device. Since a pump and a pressurized water supply device are required, the facilities are large, equipment costs and the like are incurred, and it is difficult to cope with relocation, etc., so it is not suitable for use at construction sites. Furthermore, in the said patent document 3, in addition to using a fan, the means for supplying water and air to a water pipe and an air pipe is needed.

  On the other hand, in patent document 4, a spraying apparatus main body is required and an installation becomes large. In addition to the cost of the equipment, it is difficult to respond to movement, etc., and there is a loss of surplus water, the time for the reservoir, the place for installing the equipment, and the like.

  Therefore, the present invention is intended to solve such problems, and provides a spray cooling system and a spray cooling method for a construction site that can be used inexpensively and easily at a construction site using water. For the purpose.

  The invention of claim 1 is a spray cooling system for cooling the working space of a construction site, comprising a spray nozzle, a water supply, and a pipe line directly connecting them, and spraying tap water from the spray nozzle at a water pressure of the water supply. It is.

  According to a second aspect of the present invention, the spray nozzle rotates or swings due to the water pressure of the water supply.

  According to a third aspect of the present invention, one spray nozzle is provided at the distal end of the pipe line, and the outlet of the water supply is directly connected to the proximal end of the pipe line. Tap water is sprayed from the nozzle.

  Moreover, invention of Claim 4 sprays the said tap water as dry mist.

  According to a fifth aspect of the present invention, the inner surface of the conduit is a smooth surface.

  In the invention of claim 6, the inner surface of the pipe has an average roughness coefficient of 0.01 or less.

  The invention of claim 7 has an adjusting valve for adjusting the amount of water at the outlet of the water supply.

  The invention according to claim 8 is an open space in which the work space of the construction site does not have a roof and / or side walls.

  In the invention of claim 9, the spray nozzle is installed below the outlet of the water supply.

  The invention of claim 10 includes a pressure-intensifying pump for increasing the pressure of the tap water in a pipe line.

  The invention of claim 11 uses the spray cooling system for a construction site according to any one of 1 to 10, and sprays the roof and / or the side wall to radiate cooling the roof and / or the side wall. Is a method of lowering the temperature.

  Moreover, invention of Claim 12 uses the spray cooling system of the construction site of any one of Claims 1-10, moves a spray nozzle to the top floor for every start at construction start-up construction. How to install.

  According to the structure of Claim 1, since it is a structure of a spray nozzle, a pipe line, and a water supply, it can provide a very simple and inexpensive spray cooling system, and the work environment is improved by cooling (improving work efficiency, measures against heat stroke). Can be achieved.

  And, since it is not necessary to store water directly connected to the water supply, facilities such as a water storage tank and a pressure pump are not required on the way. For this reason, it is lightweight and easy to install, move and remove, and is suitable as a temporary facility at a construction site. In addition, there is no loss of surplus water, the time of the reservoir, the installation location of equipment, etc., and the water pressure is not lost by using the water pressure of the water supply.

  Moreover, according to the structure of Claim 2, it can spray on a large working space by rotation or rocking | fluctuation of a spray nozzle, Thereby, the installation number of spray nozzles can be reduced.

  Moreover, according to the structure of Claim 3, since only one spray nozzle was provided at the front-end | tip of a pipe line, it is easy to attach without requiring a branch pipe. In addition, compared with installing a plurality of spray nozzles, there is less attenuation of water pressure (loss head), and the spray diffusion range extends far.

  Moreover, according to the structure of Claim 4, a dry mist does not stick even if it touches a human body, and can provide a refreshing work space.

  Moreover, according to the structure of Claim 5, water becomes easy to pass through, there is little attenuation | damping (loss head) of the water pressure of the water supply by friction, and the spreading | diffusion diffusion range extends far.

  Moreover, according to the structure of Claim 6, the loss head by friction can be made as small as possible, and the pressure head of a water supply can be maintained.

  Moreover, according to the structure of Claim 7, in order to adjust the amount of water with the adjustment valve of the outlet of a water supply, it is not necessary to provide an adjustment valve in a spray nozzle or a pipe line, and it installs in a place where a spray nozzle is hard to reach. Even so, the spray amount and the diffusion range can be easily adjusted.

  Moreover, according to the structure of Claim 8, even if it is the open space which does not have a roof or a side wall, since the air cooled by the fog accumulates under heavy, it can apply to cooling of a working space. In addition, the water droplets contained in the fog are easily vaporized by direct sunlight, and even if the water droplets have a large particle size, they are not sticky.

  Moreover, according to the structure of Claim 9, a position nozzle is added by installing a spray nozzle below from the exit of a water supply, and it becomes advantageous to spraying together with the water pressure (pressure head) of a water supply.

  Moreover, according to the structure of Claim 10, it can spray by increasing the water pressure of a water supply, without applying a load to the water supply side, and the application range of a system spreads.

  Further, according to the configuration of claim 11, since the work space is cooled by radiation cooling of the roof / side wall, it is possible to use water droplets having a large particle diameter that are not dry mist, and the application range of the system is expanded.

  Moreover, according to the structure of Claim 12, since the spray nozzle is moved and installed in the top floor for every start-up in construction, equipment can be diverted and it leads to cost reduction. In addition, the top floor is a place where it is properly exposed to solar radiation, which greatly improves the work environment.

  Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, by adopting a spray cooling system and spray cooling method at a new construction site that is different from the conventional one, an unprecedented spray cooling system and spray cooling method at a construction site can be obtained. And spray cooling method are described respectively.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 2 show Embodiment 1 of the present invention, and as shown in the figure, in order to construct an underground part of a building or an underground structure, earth retaining walls 101 and 101 made of steel sheet piles are constructed. Then, between these earth retaining walls 101, 101 is excavated, and along with the excavation, horizontal cut beams 102 are provided in a plurality of stages on the both earth retaining walls 101, 101 to construct a standing hole 103. In the figure, reference numeral 104 denotes a fence provided on the ground outside the vertical hole 103, and is formed of a single pipe or the like.

  The spray cooling system 1 used in such a construction site includes a spray nozzle 2, a water supply 3, and a conduit 4 directly connecting them as a basic configuration.

  The water supply 3 is a public water supply used by the public, and as shown in FIG. 1, the pipe 4 is directly connected to a general water tap 5. And it sprays using the water pressure of the water supply 3, without pumping on site. Further, when used in an area where the water pressure is high, it is effective when the spray nozzle 2 is installed at a location lower than the outlet of the water supply 3. Further, the amount of water may be adjusted by the faucet 5 serving as an adjustment valve at the outlet of the water supply 3, and an adjustment valve may be provided separately from the faucet 5.

  The spray nozzle 2 is a primary fluid type nozzle that uses only water pressure, and sprays tap water at the pressure of the water supply 3. As shown in FIG. 1, the retaining wall 101 is disposed below the faucet 5 of the water supply 3. In addition, the position of the faucet 5 which is an exit of the water supply 3 is based on the ground position or the first floor position in the building.

  In FIG. 1, one spray nozzle 2 is provided corresponding to one faucet 5 of the water supply 3, and the faucet 5 and the spray nozzle 2 are directly connected by a single conduit 4, and branch to this conduit 4. The tap water is sprayed from the corresponding one spray nozzle 2 by the water pressure of one faucet 5.

  On the other hand, when a plurality of spray nozzles are attached to the conduit 4, a spray range can be secured on the conduit 4, but the spray diffusion range at the individual nozzles is narrowed as the pressure head is lowered. When one spray nozzle 2 is attached to the tip of the pipe line 4 as in this embodiment, it is easy to install without the need for a branch pipe, and the pressure head is maintained so that the spray diffusion range is increased. It extends far away. Moreover, it is not necessary to bother to transfer tap water to the water storage tank, and the energy of tap water is not lost.

  The spray nozzle 2 may be rotated or swung by the water pressure of the water supply 3. If it does in this way, it can spray on a large work space. The swinging is exemplified by angular rotation that reciprocates within a certain angular range, such as a sprinkler. In order to rotate or swing the spray nozzle 2, water pressure or spray reaction force is used. For example, as shown in FIG. 2, the spray nozzle 2 is configured such that a radially arranged nozzle pipe 112 is rotatably provided on a rotating shaft 111, and tap water is sprayed from the tip of the nozzle pipe 112, thereby spraying power. Thus, the nozzle tube 112 may be rotated.

  Preferably, an adjustment valve is provided at the outlet of the water supply 3, but an adjustment valve (not shown) may be provided for each spray nozzle 2.

  In addition, you may use it in combination with the spray nozzle 2 and an air blower (not shown), and it can spray on a wide working space by using an air blower. Moreover, although the spray nozzle of the spray nozzle 2 is represented by the nozzle type, it may be constituted by a plurality of holes.

  When the water droplets (mist) sprayed from the spray nozzle 2 evaporate, it takes the heat of the outside air (or substance) and has an effect of lowering the temperature in the vicinity by several degrees. Here, fog refers to a floating body of water that has a very slow drop speed. Water droplets of about 100 μm or less at the boundary between micro-mist and drizzle are usually referred to as mist, and more than that is referred to as rain droplets. However, you may spray 100-300 micrometers fine mist (drizzle).

  From the spray nozzle 2, it is preferable to spray dry mist (also known as dry fog), and the sprayed fine mist means that the spray is not sticky even when touched by the human body, such as temperature and humidity. Although it cannot be generally stated because it receives the conditions, a fine mist having an average particle diameter of about several tens of μm or less is applicable.

  The material of the pipe line 4 is not particularly limited, such as steel, concrete, resin, and rubber. In addition, the material and tube diameter may change during the process. For example, the pipe 4 is made of a hard material such as an iron tube or a fume tube, or a flexible material such as a vinyl hose, a pressure hose, or a sunny hose.

  Further, the roughness coefficient of the pipeline 4 will be described. The roughness coefficient is based on Manning's equation.

  The pipe | tube used for the pipe line 4 and its roughness coefficient are shown below.

1) Hume pipe (concrete): n = about 0.013
2) Ceramic pipe (ceramics): n = about 0.013
3) High ceramic tube: n = 0.010
4) PVC pipe (hard): n = about 0.010 In this example, the average roughness coefficient of the pipe line 4 is preferably 0.010 or less in order to make effective spraying by utilizing the water pressure of the water supply 3. Thereby, a loss head can be made as small as possible, and the pressure head of the water supply 3 can be maintained.

  In addition to selecting the material of the pipe line 4, the inner surface of the pipe line 4 is smoothed by coating the inner surface with fluororesin or the like to reduce the roughness coefficient.

  A water amount adjusting valve may be attached to the pipe line 4.

  The standing hole 103 is an open space opened upward, but a cover such as a roof may be provided on the standing hole 103 to form a closed space. In either case, the air cooled by spraying is heavy and falls down, so that cold air is given to the worker who works at the bottom of the upright hole 103.

  And the cooling efficiency is superior in the closed space. On the other hand, in an open space without a cover such as a roof exposed to direct sunlight, water droplets are likely to vaporize, and even if the particle size of the water droplets is large, it is not sticky.

  As shown in FIG. 1, the spray nozzle 2 sprays toward the air, but may be sprayed on the roof / side wall and cooled to give indirect cold air. You may spray toward the earth retaining wall 101. Thus, when spraying so that water droplets adhere to the material to be sprayed, it is preferable to spray with a particle size larger than that of dry mist, and as such, water droplets with a relatively large particle size are used, and the degree of wetting is reduced. Since it is effective and does not mist the worker, it is not sticky and the work environment can be cooled by indirect cold air using a roof / side wall or the like.

  And the tap 5 of the water supply 3 is opened, the tap water which passed the pipe line 4 is sprayed from the spray nozzle 2, and the working space is cooled by vaporizing the sprayed mist-like tap water. And at construction sites, they are often exposed to intense solar radiation for long periods of time under hot summer heat and at open construction sites. Even in a closed space, it may become hot due to exhaust heat from machines and people, geothermal heat, and the like. On the other hand, the construction work space is cooled by spraying using tap water pressure.

  In the past, measures were taken for individuals, such as replenishing water and salt, ensuring sufficient sleep, and wearing a helmet with a cooling function, but work efficiency was improved by cooling the work space. Can be prevented. In addition, it is possible to prevent the occurrence of human error, heat stroke and the like. As a secondary effect, dust can be reduced.

  As described above, in this embodiment, the spray cooling system 1 for lowering the temperature of the vertical hole 103 as the work space of the construction site includes the spray nozzle 2, the water supply 3, and the conduit 4 directly connecting them. Since the tap water is sprayed at a water pressure of 3, the spray nozzle 2, the pipe 4 and the water 3 are configured, so that an extremely simple and inexpensive spray cooling system can be provided, and the work environment is improved by cooling (improving work efficiency) , Measures against heat stroke).

  And since it is not necessary to connect with the water supply 3 and to collect water, facilities, such as a water storage tank and a pressurization pump, are not required on the way. For this reason, it is lightweight and easy to install, move and remove, and is suitable as a temporary facility at a construction site. Moreover, the loss of surplus water, the time of a water reservoir, the installation location of an installation, etc. does not generate | occur | produce, but the energy which the water supply 3 has is not lost by utilizing the water pressure of the water supply 3.

  Further, in this embodiment, since the spray nozzle 2 rotates or swings due to the water pressure of the water supply 3, the spray nozzle 2 can spray on a wide working space by rotating or swinging the spray nozzle 2. The number of installation is small.

  As described above, in this embodiment, one spray nozzle 2 is provided at the distal end of the conduit 4, and the faucet 5 serving as the outlet of the water supply 3 is directly connected to the proximal end of the conduit 4. Since tap water is sprayed from one spray nozzle 2, only one spray nozzle 2 is attached to the tip of the pipe line 4, so that it is easy to install without requiring a branch pipe. Further, compared with the case where a plurality of spray nozzles 2 are installed, the attenuation of water pressure (loss head) is small, and the spray diffusion range extends far.

  Further, in this embodiment, since tap water is sprayed as dry mist, the dry mist does not stick even when touched by a human body, and an exhilarating work space can be provided.

  Further, in this embodiment, since the inner surface of the pipe line 4 is a smooth surface, water can easily pass therethrough, and there is little attenuation of water pressure (loss of water head) due to friction, and the spray diffusion range extends far.

  In this way, in this embodiment, since the roughness coefficient of the inner surface of the pipe line 4 is 0.01 or less on average, the loss head due to friction can be minimized and the pressure head of the water supply 3 can be maintained.

  Further, in this embodiment, since the faucet 5 serving as an adjustment valve for adjusting the amount of water is provided at the outlet of the water supply 3, there is no need to provide an adjustment valve in the spray nozzle 2 or the conduit 4, and the spray nozzle 2 Even if it is installed in a place where it is difficult to reach, the spray amount and diffusion range can be easily adjusted.

  Further, in this embodiment, since the work space at the construction site is an open space without a roof, the air cooled by spraying accumulates heavily underneath, and therefore can be applied to cooling the work space. Moreover, the water droplets contained in the mist are easily vaporized by direct sunlight, and the water droplets do not become sticky even when the particle size of the water droplets is large.

  Further, in this embodiment, since the spray nozzle 2 is installed below the outlet of the water supply 3, the position head is added by installing the spray nozzle 2 below the outlet of the water supply 3. It is advantageous for spraying together with water pressure (pressure head).

  3 to 4 show a second embodiment of the present invention. The same reference numerals are given to the same portions as those in the first embodiment, and a detailed description thereof will be omitted. In this example, the building has a plurality of floors. A spray cooling system is used for on-site work. As shown in the figure, a scaffold 12 is assembled so as to surround the site of the building 11, the tip of the pipe 4 is connected to the tap 5 of the ground water supply 3, and the pipe 4 is piped along the scaffold 12. Then, the operation is started up to the work floor, and the spray nozzle 2 disposed above the work floor 13 is connected to the proximal end of the pipeline 4.

  FIG. 4 shows an example of a plan view of the building 11. A plurality of spray nozzles 2 are provided around the building 11, and tap water is sprayed from each spray nozzle 2 to the spray range F.

  In this example, the spray nozzle 2 is directed obliquely upward to spray the top floor 13 under construction. That is, when building the first floor portion, the spray nozzle 2 is placed at the height position H1, and when building the second floor portion, the spray nozzle 2 is placed at the height position H2, and the third floor portion is placed. When building, the spray nozzle 2 is arranged at the height position H3, and when building the fourth floor part above the third floor part, as shown in FIG. Spray tap water. In this way, the spray nozzle 2 is moved and installed on the top floor 13 at each rise, and tap water is sprayed on the work space of the top floor 13. At the rise of the building 11, the top floor 13 is exposed to direct sunlight. Therefore, the spray nozzle 2 is moved and installed for each rising floor.

  Thus, the spray nozzle 2 is installed above the outlet of the water supply 3 and used. In this way, the position head is subtracted and the spray water pressure is lowered, but it can be used in areas where the water pressure of the water supply 3 is high. If the water pressure is low, the spraying range becomes narrow, and a cover for a narrow working space is provided.

  As described above, in this embodiment, the same operations and effects as those of the above-described Embodiment 1 are obtained. In this embodiment, the construction work of the building 11 is started using the spray cooling system at the construction site described above. Since the spray nozzle 2 is moved and installed on the top floor 13 at each start-up, the equipment can be diverted, leading to cost savings. In addition, the top floor 13 is a place where it is properly exposed to solar radiation, and the work environment is greatly improved.

  Moreover, although the spray nozzle 2 was moved for every 1st floor of the building 11, you may move the spray nozzle 2 for every 2nd floor.

  FIG. 5 shows a third embodiment of the present invention. The same reference numerals are assigned to the same parts as those of the above-described embodiments, and detailed description thereof will be omitted. In this example, a building that is a construction site is dismantled. The site 21 and the like are shown, and the periphery of the dismantling site 21 is covered with a temporary enclosure 24 composed of a roof 22 and side walls 23, 23. The dismantling site 21 is made into a substantially sealed space, and a spray nozzle is formed from the outside of the temporary enclosure 24. 2 sprays tap water on the outer surface of the side wall 23. In this example, since the spray nozzles 2 and 2 are used at a relatively low position, tap water is sprayed from a plurality of (two on the left and right in the figure) spray nozzles 2 and 2 onto one water supply 3. Also good.

  And when spraying on the outer side of the roof 22 or the side wall 23 like this example, it becomes easy to vaporize because sunlight and humidity are low. In addition, various materials such as cloth (tent fabric), steel, and porous material can be used as the material of the roof 22 and the side wall 23. If a porous material is used, water can be retained even after excessive spraying. Can do.

  By spraying tap water with the spray nozzle 2 to the outside of such a closed space, the inside can be cooled by the heat of vaporization. Thus, the closed space has no air movement, and the cooling efficiency is excellent. As shown in the center of FIG. 5, tap water may be sprayed from the spray nozzle 2 to the outer surface of the roof 22. In this case, it is effective that the tap water is sprayed with water droplets having a relatively large particle diameter and the roof 22 or the side wall 23 is wet. The spray nozzle 2 in the center of FIG. 5 is supported by a support (not shown) provided on the roof 22 and is fixed on the roof 22.

  Also, spraying from the outside is effective when moisture is disliked during temporary enclosure. In particular, the spraying method can deal with a wide range with one spray nozzle 2 and is advantageous in field work. Furthermore, indirect cold air can create a mellow air environment by radiation cooling.

  As described above, in this embodiment, the same operations and effects as the above-described embodiments are obtained.

  FIG. 6 shows a fourth embodiment of the present invention. The same reference numerals are assigned to the same parts as those of the above-described embodiments, and detailed description thereof is omitted. In this example, the building that is the construction site is dismantled. The site 21 and the like are shown, and the dismantling site 21 is covered with a temporary enclosure 24A composed of a roof 22 and pillars 25, 25, and the side of the dismantling site 21 is opened to an open space. The tap water is sprayed into the dismantling site 21 and a part is sprayed toward the lower surface of the roof 22.

  In this way, the same operation and effect can be achieved even in an open space where the side surface is open, and in both the closed space and the open space, the cooled air falls down heavily, so that the worker can be given cold air, and the roof The roof 22 is cooled by the heat of vaporization of tap water sprayed on the lower surface of the 22 and a mellow air environment can be created by indirect radiation cooling.

  Tap water may be sprayed from above the roof 22, trimist is sprayed from the spray nozzle 2 spraying into the dismantling site 21, and relatively small particles are sprayed from the spray nozzle 2 spraying onto the roof 22. It is effective that the water droplets have large diameters and the roof 22 gets wet. Further, by spraying the inside of the dismantling site 21, it is possible to prevent scattering of dust generated by the work.

  It should be noted that dry mist may be sprayed into the temporary enclosure 24A from at least one of the plurality of spray nozzles 2 and tap water may be sprayed from the other spray nozzles 2 toward the lower surface of the roof 22, or the like.

  And when spraying on the upper surface and lower surface of the roof 22 like this example, it becomes easy to vaporize because sunlight and humidity are low. Various materials such as cloth (tent fabric), steel, and porous material can be used as the material of the roof 22, and the use of the porous material can retain water even when excessive spraying is performed.

  Also in the third embodiment, tap water may be sprayed on the lower surface of the roof 22 and the inner surface of the side wall 23.

  As described above, in this embodiment, the same operations and effects as those of the above-described embodiments are obtained. In this embodiment, the work space on the construction site is an open space having no side walls, and thus cooling by fog is performed. Since the air thus collected is heavy and accumulates below, it can be applied to cooling the work space. In addition, the water droplets contained in the fog are easily vaporized by direct sunlight, and even if the water droplets have a large particle size, they are not sticky.

  7 to 8 show a fifth embodiment of the present invention. The same reference numerals are given to the same parts as those of the above-mentioned embodiments, and detailed description thereof will be omitted. In this example, the number of pipes 4 is increased. A pressure pump 31 is provided to increase the pressure of the tap water flowing through the pipeline 4. That is, an ordinary high-pressure pump applies an excessive negative pressure to the water supply 3 and thus cannot be directly connected and it is necessary to provide a water receiving tank. However, the pressure increase pump 31 makes use of the water pressure of the water supply 3. While increasing the tap water when necessary.

  As the pressure-intensifying pump 31, when the discharge side pipe pressure drops to the starting pressure, it is detected by the discharge side pressure sensor, the pump body (not shown) is started, and the pump discharge pressure or terminal pressure (estimated) In order to maintain a constant pressure, a bypass pipe (not shown) is provided across the main body of the pump. When spraying only with tap water pressure, tap water is sent to the spray nozzle 2 through the bypass pipe and pressure is increased. A so-called booster pump that increases pressure through the main body, or an injection pipe 32 that injects driving high-pressure water as shown in FIG. 8 is connected to the pipe 4, and high-pressure water is supplied from the high-pressure water injection means 33 connected to the injection pipe 32 to the water supply. A high pressure air injection means 33A is provided in place of the high pressure water injection means 33 which is jetted in the direction of water flow to increase the water pressure, and high pressure air is supplied from the high pressure air injection means 33A connected to the injection pipe 32 to the tap water. Erupting in the flow direction In this case, one that increases the water pressure is used, or one that simultaneously injects high-pressure water and high-pressure air into the injection pipe 32 to increase the water pressure. A pump that boosts pressure is used. The booster pump does not put a load on the water supply.

  As described above, in this embodiment, the same operation and effect as the above-described Embodiment 1 are obtained. In addition, in this embodiment, since the tap water is increased in the pipeline 3, the load is applied to the tap water 3 side. Without spraying, the water pressure of the water supply 3 can be increased.

  In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible. For example, the construction site includes a civil engineering site, and the construction site may be an on-site processing site such as a reinforcing bar for processing a reinforcing bar used for construction or civil engineering on site. Furthermore, the spraying direction of the spray nozzle can be changed manually.

It is sectional drawing which shows Example 1 of this invention. It is a top view of a spray nozzle same as the above. It is sectional drawing which shows Example 2 of this invention. It is a top view same as the above. It is sectional drawing which shows Example 3 of this invention. It is sectional drawing which shows Example 4 of this invention. It is sectional drawing which shows Example 5 of this invention. It is a section explanatory view showing the important section of a pipe line same as the above.

Explanation of symbols

1 System 2 Spray nozzle 3 Water supply 4 Pipe line 5 Faucet (regulating valve)
11 Building
12 Scaffold
13 Work floor
21 Demolition site (construction site)
22 Roof
23 Side wall
31 Booster pump
101 Earth retaining wall (side wall)
103 Standing hole (construction site)

Claims (12)

A spray cooling system for lowering the working space of a construction site, comprising a spray nozzle, a water supply, and a pipe line directly connecting them, wherein the tap water is sprayed from the spray nozzle at the water pressure of the water supply. Spray cooling system. 2. The spray cooling system for a construction site according to claim 1, wherein the spray nozzle is rotated or oscillated by a water pressure of a tap water. One spray nozzle is provided at the distal end of the pipe line, and the outlet of the water supply is directly connected to the base end of the pipe line, and tap water is sprayed from the one spray nozzle by the water pressure of the water supply at the outlet. 2. A spray cooling system for a construction site according to claim 1, The spray cooling system for a construction site according to any one of claims 1 to 3, wherein the tap water is sprayed as dry mist. The spray cooling system for a construction site according to any one of claims 1 to 4, wherein an inner surface of the pipe line is a smooth surface. 6. The spray cooling system for a construction site according to claim 5, wherein the inner surface of the pipe has an average Manning roughness coefficient of 0.01 or less. The spray cooling system for a construction site according to claim 1, further comprising an adjustment valve that adjusts the amount of water at an outlet of the water supply. 2. The spray cooling system for a construction site according to claim 1, wherein the working space of the construction site is an open space having no roof and / or side walls. 2. The spray cooling system for a construction site according to claim 1, wherein the spray nozzle is installed below the outlet of the water supply. The spray cooling system for a construction site according to any one of claims 1 to 9, further comprising a pressure increasing pump for increasing the pressure of the tap water in the pipe line. A spray cooling system for a construction site according to any one of claims 1 to 10, wherein the work space is cooled by spraying the roof and / or side walls and radiative cooling of the roof and / or side walls. Spray cooling method for construction site. A construction site using the spray cooling system for a construction site according to any one of claims 1 to 10, wherein the spray nozzle is moved and installed on the top floor at each rise in the building construction. Spray cooling method.

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