JP6308766B2 - Spray system for temperature drop in tunnel - Google Patents

Description

  The present invention relates to a spray system for temperature drop in a tunnel, which regulates the control of mist spray in order to achieve both suppression of temperature rise in the tunnel and ensuring the viewing environment of users in the tunnel.

  As a conventional technique, a temperature lowering spray system for reducing the temperature of a space opened to the atmosphere is known (see, for example, Patent Document 1). According to this Patent Document 1, by appropriately setting the installation height of the spray nozzle and the spray amount of the mist on the basis of the Sauter average particle diameter of the mist, it is possible to cool appropriately without wetting people in the open space. can do.

Japanese Patent No. 4488510

However, the prior art has the following problems.
Patent Document 1 is intended for a temperature drop in a space open to the atmosphere, and defines parameters relating to the average particle diameter of the mist, the nozzle installation height, and the mist spray amount within a certain appropriate range.

  On the other hand, when the vehicle is moving intermittently and the inside of the tunnel, which is a semi-enclosed space, is the target space for temperature reduction, there is a problem that cannot be solved by the conventional technology that assumes a space opened to the atmosphere. Arise.

  Specifically, in a tunnel that is a semi-enclosed space, the wind is flowing in the longitudinal direction of the tunnel. It is also important to ensure a visual environment for a driver who uses the inside of the tunnel (a driver of a vehicle passing through the tunnel). From this point of view, in order to achieve both suppression of the temperature rise in the tunnel and ensuring the visual environment of the driver using the tunnel, the mist spraying in the semi-enclosed space is targeted to the open space. More severe use conditions are required than the case.

  The present invention has been made to solve the above-described problems, and realizes a mist spray that achieves both suppression of temperature rise in the tunnel and securing of the visual environment of the driver using the tunnel. The purpose is to obtain a spray system for temperature drop in the tunnel.

The spray system for temperature drop in the tunnel according to the present invention sprays water as a mist from a spray nozzle installed in a predetermined mist spray section in the tunnel, which is a semi-closed space, and uses the inside of the tunnel. A spray system for lowering the temperature in a tunnel that suppresses a temperature rise in the tunnel while ensuring a visual environment for a driver, comprising one or more spray nozzles, wherein the water is supplied to the spray nozzle on the primary side of the spray nozzle. A plurality of mist pipes having opening / closing selection valves for selecting whether or not to supply the mist are provided in one mist spraying section substantially parallel to the roadway, and the one mist spraying is performed according to the number of opening the opening / closing selection valve. The amount of mist sprayed into the compartment is adjusted .

The spray system for temperature drop in the tunnel according to the present invention sprays water as a mist from a spray nozzle installed in a predetermined mist spray section in the tunnel, which is a semi-closed space, and uses the inside of the tunnel. A tunnel temperature drop spraying system that suppresses temperature rise in the tunnel while ensuring a driver's visual environment, and each time a mist pipe having two or more spray nozzles includes one or more spray nozzles An opening / closing selection valve is provided on the primary side, and the amount of mist sprayed into the mist spraying section is adjusted by closing at least one of the opening / closing selection valves .

  According to the present invention, when controlling the mist spray amount, the mist amount in the mist spray section is easily adjusted by opening and closing the open / close selection valve of the mist pipe to which the spray nozzle is connected, and the optimum mist spray amount Thus, it is possible to obtain a spraying system for temperature drop in the tunnel that can achieve both suppression of the temperature rise in the tunnel and ensuring the visual environment of the driver using the tunnel.

  Further, according to the present invention, when controlling the mist spray amount, the mist amount in the mist spray section is easily adjusted by closing at least one of the open / close selection valves of the mist pipe connected to the spray nozzle. Thus, an optimum mist spray amount can be obtained, and a tunnel temperature drop spray system capable of achieving both suppression of temperature rise in the tunnel and ensuring of the visual environment of the driver using the tunnel can be obtained.

1 is an overall view of a tunnel temperature lowering spray system 1 according to Embodiment 1 of the present invention. In Embodiment 1 of this invention, it is a figure which shows the state which closed the on-off selection valve 51 (1), and reduced the amount of mist spraying from normal. It is a general view of the spray system 100 for temperature fall in the tunnel in Embodiment 2 of this invention. In Embodiment 2 of this invention, it is a figure which shows the state which closed the on-off selection valve 52 (3), and reduced the amount of mist spraying from normal. It is a general view of the spray system for temperature fall in a tunnel which combined Embodiment 1 and Embodiment 2 of this invention.

  Hereinafter, a preferred embodiment of a spray system for temperature drop in a tunnel of the present invention will be described with reference to the drawings.

<Embodiment 1>
FIG. 1 is an overall view of a tunnel cooling system 1 according to Embodiment 1 of the present invention. More specifically, it is an explanatory view schematically showing the arrangement of each device in a tunnel constituting one semi-closed space.

  In FIG. 1, a plurality of spray nozzles 10 are provided on a wall surface in a predetermined mist spray section in a tunnel. The plurality of spray nozzles 10 are mist pipes 50 (1), 50 (2), and 50 (3) that are laterally drawn pipes that are laid on a side wall in the mist spray section substantially in parallel with the roadway (for example, three rows). The mist pipes 50 (1), 50 (2), and 50 (3) each have the same number of open / close selection valves (spray selectors) 51 (spray selectors) that are normally open on the primary side of the spray nozzle 10. 1), 51 (2), 51 (3) are provided.

  Before and after the mist spray section, temperature and humidity meters 30 (1) and 30 (2) are provided. The arrangement of the thermohygrometer is not limited to the example of FIG. 1, and one or more thermohygrometers can be arranged between the thermohygrometers 30 (1) and 30 (2). .

  When the temperature in the tunnel exceeds a predetermined threshold value (for example, 30 ° C.) and the humidity is less than the predetermined threshold value (for example, 80%), the spray amount control unit 40 starts mist spraying. The water pump which does not perform is started and water is pressurized and fed to the mist pipe 50.

  When the water supplied under pressure reaches the spray nozzle 10, it is discharged as a mist having a Sauter average particle size of less than 80 μm.

  The released mist evaporates in the tunnel, and the temperature in the tunnel is lowered by the heat of vaporization at that time, but at the same time the humidity in the tunnel is increased. When the humidity rises and exceeds 80%, the mist is less likely to evaporate. If the mist spray is continued in this state in the same way, water droplets will adhere to the windshield of the car, affecting the driver's visibility. Therefore, it is necessary to control the amount of mist spray so that the humidity falls within a predetermined value (for example, 80%).

  When the humidity rises during the mist spraying and the value of the thermohygrometer 30 (1) or the thermohygrometer 30 (2) exceeds a predetermined threshold (for example, 75%), the spray amount control unit 40 is shown in FIG. As described above, the open / close selection valve 51 (1) is closed and the mist spray amount is reduced to 2/3 of the normal amount.

  Even in this state (even if a predetermined time elapses), if the humidity does not recover below a predetermined value (for example, 75%), the spray amount control unit 40 further closes the open / close selection valve 51 (2), and the mist Reduce spray volume to 1/3 of normal.

  Thereafter, when the humidity recovers below 75%, the opening / closing selection valve 51 (2) and the opening / closing selection valve 51 (1) are sequentially opened again to increase the amount of mist spray and lower the ambient temperature. You may control to.

  Note that a threshold value may be set for each of temperature and humidity, and a combination of open / closed states of the open / close selection valves 51 (1), 51 (2), and 51 (3) may be set depending on a combination thereof.

  The amount of the mist spray can be easily controlled by controlling the quantity of the open / close selection valve 51 thus opened, and the mist spray for achieving both suppression of the temperature rise in the tunnel and ensuring the visual environment of the driver using the inside of the tunnel. Can be realized.

In the first embodiment, the same number of spray nozzles 10 are respectively attached to the mist pipes 50 (1), 50 (2), and 50 (3). For example, it is most common in the mist pipe 50 (1), the mist pipe 50 (2) has half the mist pipe 50 (1), the mist pipe 50 (3) has half the mist pipe 50 (2), and so on. By changing the number of spray nozzles 10 attached to each mist pipe 50 and changing the combination of opening / closing selection valves 51 (1), 51 (2), 51 (3) according to the situation, the amount of mist spraying Can be controlled more finely.

<Embodiment 2>
In the tunnel temperature decreasing spray system 100 according to the second embodiment, the tunnel temperature decreasing spray system 1 according to the first embodiment shares the components such as the spray nozzle 10, the temperature / humidity meter 30, and the spray amount control unit 40. As shown in FIG. 3, the system is different from the system shown in FIG. 3 in that each time one or more spray nozzles 10 are attached, the open / close selection valve (spray selector) 52 (1) that is normally open on the primary side thereof. 52 (2) and 52 (3) are provided. (For example, from the primary side of the mist pipe 50, the open / close selection valve 52 (1), 10 spray nozzles 10, open / close selection valve 52 (2), 10 spray nozzles 10, open / close selection valve 52 (3), spray nozzle In order of 10)

  When the temperature in the tunnel exceeds a predetermined value (for example, 30 ° C.) and the humidity is less than the predetermined value (for example, 80%), the spray amount control unit 40 starts mist spraying. The water pump which does not perform is started and water is pressurized and fed to the mist pipe 50.

  When pressurized water is supplied to the mist pipe 50, mist having a Sauter average particle size of less than 80 μm is sprayed from all the spray nozzles 10 attached to the mist pipe 50.

  When the humidity rises during mist spraying and the value of the thermo-hygrometer 30 (1) or 30 (2) becomes a predetermined value (for example, 75%) or more, the spray amount control unit 40, as shown in FIG. The on-off selection valve 52 (3) on the downstream side is closed, and the mist spray amount is reduced to the normal 2/3 (20 spray nozzles 10 for mist spray).

  Even in this state (even if a predetermined time elapses), when the humidity does not recover below a predetermined value (for example, 75%), the spray amount control unit 40 further closes the upstream open / close selection valve 52 (2). Then, the mist spray amount is reduced to 1/3 of normal (10 spray nozzles 10 for mist spraying).

Thereafter, when the humidity recovers below a predetermined value (for example, 70%), the opening / closing selection valves 52 (2) and 52 (3) are sequentially opened again from the upstream side to increase the mist spray amount, You may control so that ambient temperature may be lowered | hung.

The mist spray amount can be easily controlled by selecting and controlling the opening / closing selection valve 52 to be closed in this way, and it is possible to control the temperature rise in the tunnel and secure the visual environment for the driver using the tunnel. Spraying can be performed.

In the second embodiment, the same number of spray nozzles 10 are attached to the secondary sides of the open / close selection valves 52 (1), 52 (2), 52 (3), but the present invention is not limited to this. For example, the number of nozzles 10 is the largest on the secondary side of the open / close selection valve 52 (1), the open / close selection valve 52 (2) is half of the open / close selection valve 52 (1), and the open / close selection valve 52 (3) is open / closed. The number of spray nozzles 10 that can be sprayed by each open / close selection valve 52 is different, such as half of the selection valves 52 (2), and the open / close selection valves 52 (1), 52 (2), 52 ( By opening and closing 3), the amount of mist spray can be controlled more finely.

  It should be noted that the in-tunnel temperature decreasing spray system 1 of the first embodiment and the in-tunnel temperature decreasing spray system 100 of the second embodiment may be combined. For example, as shown in FIG. Pipes 50 (1), 50 (2), 50 (3) are laid, and the mist pipe 50 (1) is provided with an open / close selection valve (spray selection unit) 53 (1), 53 (2), 53 (3). Each of the open / close selection valves 53 (1), 53 (2), 53 (3) is provided with 10 spray nozzles 10 on the secondary side. Similarly, the mist pipe 50 (2) has an open / close selection valve (spray selection). Part) 53 (4), 53 (5), 53 (6) and ten spray nozzles 10 on the secondary side thereof, similarly, the mist pipe 50 (3) has an open / close selection valve (spray selection part) 53. (7), 53 (8), 53 (9) and 10 spray nozzles 10 on the secondary side. Thus, according to the temperature and humidity conditions, for example, similarly to the first and second embodiments, the mist spray amount is controlled more finely by changing the closing position of the open / close selection valves 53 (1) to (9). Can do.

  Further, in the example of the tunnel temperature lowering spray system 1 according to the first embodiment, the tunnel temperature lowering spray system 100 according to the second embodiment, and the combination described above, the open / close selection valves 51 (1) to (3), 52 (1 ) To (3) and 53 (1) to (9) are normally open. However, the present invention is not limited to this, and may be normally closed and opened as necessary when the system is started. At this time, all open / close selection valves are not always closed. For example, only the open / close selection valve on the most primary side of the mist pipe is always closed. It can be set according to the situation.

DESCRIPTION OF SYMBOLS 1 Spraying system for temperature drop in a tunnel, 10 Spray nozzle, 20 Wind direction anemometer, 30 Thermohygrometer, 40 Spray amount control part, 41 Memory | storage part, 50 Mist piping, 51, 52, 53 Open / close selection valve, 100 For tunnel temperature drop Spraying system.

Claims (2)

In a tunnel which is a semi-enclosed space, water is sprayed as a mist from a spray nozzle installed in a predetermined mist spraying section in the tunnel, and the tunnel is used after ensuring the visual environment of the driver using the tunnel. A tunnel temperature lowering spray system that suppresses temperature rise in the tunnel,
A mist pipe having one or more spray nozzles and having an open / close selection valve for selecting whether or not to supply the water to the spray nozzle on the primary side of the spray nozzle is substantially in one mist spray section with respect to the roadway. There are several in parallel,
A spraying system for temperature drop in a tunnel , wherein the amount of mist sprayed into the one mist spraying section is adjusted according to the number of opening of the open / close selection valve . In a tunnel which is a semi-enclosed space, water is sprayed as a mist from a spray nozzle installed in a predetermined mist spraying section in the tunnel, and the tunnel is used after ensuring the visual environment of the driver using the tunnel. A tunnel temperature lowering spray system that suppresses temperature rise in the tunnel,
Each time the mist pipe having two or more spray nozzles is provided with one or more spray nozzles, an open / close selection valve is provided on the primary side thereof,
A spray system for lowering the temperature in a tunnel , wherein the amount of mist sprayed into the mist spray section is adjusted by closing at least one of the open / close selection valves .