Method of working inside a tunnel and tunnel air conditioning system

Abstract

To provide a method for working inside a tunnel, capable of shortening the construction period while reliably maintaining the safety and health of workers. [Solution] When carrying out hazardous work that emits harmful substances and general work that does not emit harmful substances within a tunnel, there is first-side safety work, in which general work is carried out in parallel on a first side of the hazardous area where the hazardous work is being carried out with the airflow within the tunnel being a first-directional airflow heading from the first entrance to the second entrance, and second-side safety work, in which general work is carried out in parallel on a second side of the hazardous area where the hazardous work is being carried out with the airflow within the tunnel being a second-directional airflow heading from the second entrance to the first entrance, and work within the tunnel progresses by switching between the first-side safety work and the second-side safety work every hour.

Description

[Technical field]

[0001] The present invention relates to a method for working in a tunnel and a tunnel air conditioning system. [Background technology]

[0002] Once a tunnel has been completed, work will be required, such as repairs, renovations, rehabilitation, inspections, firefighting in the event of an accident inside the tunnel, removal of obstacles, etc. A typical example is the pipe-in-pipe (PIP) method, which is a method for rehabilitating water (water supply and sewerage) pipes by installing a new pipe inside the existing deteriorated pipe. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent 6216690 [Patent Document 2] Patent Publication No. 2016-007910 Summary of the Invention [Problem to be solved by the invention]

[0004] The pipe-in-pipe (PIP) method, which is one of the pipeline rehabilitation methods, is used as an example. One type of pipe-in-pipe method is the rolled-up pipe method. The rolled-up pipe method allows a new pipe to be installed inside the existing pipe with a diameter close to that of the existing pipe, so it can rehabilitate an aging pipeline with little cross-sectional reduction, making it a desirable method for pipeline rehabilitation. However, when installing a new pipe, the pipe must first be cut in the extension direction and rolled up to a smaller diameter in order to transport the new pipe to the installation site, and then it must be expanded to a diameter slightly smaller than that of the existing pipe at the installation site, and then welding (bonding) work must be performed in the pipe axial and circumferential directions, which means that harmful substances are generated during the welding (bonding) work, i.e., during the fixing work. Such work involving the generation of harmful substances (hazardous work) is performed by qualified, specialized workers who have received specialized training (for example, special arc welding training, gas welding hall training, organic solvent handling supervisor), and who wear protective clothing and dust masks. When harmful work is being performed, no one is allowed inside the tunnel to do other general work, i.e., work that does not involve the generation of harmful substances. For this reason, the pipe-in-pipe method using the roll-up pipe was a time-consuming (number of days) construction work. It is difficult to perform multiple tasks in parallel while reliably maintaining the safety and health environment of workers in any work inside a tunnel, not just in the pipe-in-pipe method. For this reason, even if a new tunnel is not being excavated, work inside an existing tunnel is still a difficult work in which the construction period cannot be shortened. However, in recent years, there has been a shortage of manpower, and the number of pipelines that require renovation work is enormous.

[0005] It is difficult to control the ventilation of a long tunnel, and even the wind direction changes due to the difference in temperature, air pressure, wind speed, etc. between the two tunnel entrances. In addition, in order to carry out these construction works, it is necessary not only to control the wind direction, but also to maintain a minimum wind speed of 0.8 m / s (for example, in this embodiment) or more, which is determined by the minimum ventilation volume required for simultaneous work, without exceeding the upper limit of 1.0 m / s in the Industrial Safety and Health Regulations (cold season). Therefore, a control system that can always keep the wind speed constant despite the influence of external factors (weather, climate) is required.

[0006] An object of the present invention is to provide a method for working in a tunnel that can dramatically shorten construction time while reliably maintaining the safety and health of workers, and a tunnel air conditioning system therefor. [Means for solving the problem]

[0007] The method for working inside a tunnel according to claim 1 comprises: No. One mine entrance and A method for working in a tunnel having two tunnel entrances, comprising: In carrying out hazardous work that emits harmful substances and general work that does not emit harmful substances within the tunnel, In a state where the airflow in the tunnel is a first directional airflow from the first tunnel entrance to the second tunnel entrance, Upwind A first-side safety operation in which the general operation is performed in parallel on the first side; In a state where the airflow in the tunnel is a second direction airflow from the second tunnel entrance toward the first tunnel entrance, Upwind A second-side safety operation is performed in parallel with the general operation on the second side; The work inside the tunnel is carried out by switching between the first side safety work and the second side safety work on an hourly basis. It is characterized by:

[0008] The method for working inside a tunnel according to claim 2 comprises: In the tunnel work method according to claim 1, An air conditioning system is installed in the tunnel, which switches the airflow in the tunnel between a first direction airflow from the first entrance to the second entrance and a second direction airflow from the second entrance to the first entrance; The airflow in the tunnel is switched between the first directional airflow and the second directional airflow by the air conditioning system; The work inside the tunnel is carried out by switching between the first side safety work and the second side safety work on an hourly basis. It is characterized by:

[0009] The method for working inside a tunnel according to claim 3 comprises: In the tunnel work method according to claim 1, Work is started in the tunnel in an area at or near the center between the first and second entrances, and then work is carried out in parallel toward both the first and second entrances. It is characterized by:

[0010] The method for working inside a tunnel according to claim 4 comprises: In the tunnel work method according to claim 1, The general work is the work of drawing new pipes into the tunnel, The harmful work is the work of fixing the new pipe that has been pulled in. It is characterized by:

[0011] The tunnel air conditioning system according to claim 5, No. One mine entrance and A tunnel air conditioning system that is installed in a tunnel having two tunnel entrances and switches an airflow in the tunnel between a first direction airflow from the first entrance to the second entrance and a second direction airflow from the second entrance to the first entrance, A first ventilation device is installed on the first tunnel entrance side and switches between an air supply to send outside air from the first tunnel entrance into the tunnel and an exhaust to exhaust the air in the tunnel to the outside air from the first tunnel entrance; A second ventilation device is provided on the second tunnel entrance side and switches between an air supply device that sends outside air from the second tunnel entrance into the tunnel and an exhaust device that exhausts the air in the tunnel to the outside air from the second tunnel entrance. 、 The first ventilation device and the second ventilation device are communicatively connected via wireless communication, The first ventilation device and the second ventilation device are controlled in a linked manner by an instruction from the first device to the other device, with one device being a local device and the other device being a separate device, and the first ventilation device and the second ventilation device being controlled in a linked manner by an instruction from the local device to the separate device. It is characterized by:

[0012] The tunnel air conditioning system according to claim 6, A tunnel air conditioning system that is installed in a tunnel having a first entrance and a second entrance, and switches an airflow in the tunnel between a first directional airflow from the first entrance to the second entrance and a second directional airflow from the second entrance to the first entrance, A first ventilation device is installed on the first tunnel entrance side and switches between an air supply to send outside air from the first tunnel entrance into the tunnel and an exhaust to exhaust the air in the tunnel to the outside air from the first tunnel entrance; a second ventilation device that is installed on the second tunnel entrance side and switches between an air supply that sends outside air from the second tunnel entrance into the tunnel and an exhaust that exhausts the air in the tunnel to the outside air from the second tunnel entrance; The first ventilation device and the second ventilation device are communicatively connected via wireless communication, The first ventilation device and the second ventilation device each have, as an operation mode selection means, an air supply operation selection input unit that selects an air supply operation and an exhaust operation selection input unit that selects an exhaust operation, One of the first ventilation device and the second ventilation device that has received an operation mode selection operation from a user is defined as a local device, and the other is defined as a different device, When the device itself has confirmed that its own operation state is off and that the other device is also off, the device sets the operation mode of the device itself to one of an air supply operation mode and an exhaust operation mode in accordance with an operation mode selection operation received from a user, and transmits an operation mode setting command to the other device to set the operation mode to the other of the air supply operation mode and the exhaust operation mode; The other device sets the other of the air supply operation mode and the exhaust operation mode in accordance with the received operation mode setting command. It is characterized by:

[0013] The tunnel air conditioning system according to claim 7, A tunnel air conditioning system that is installed in a tunnel having a first entrance and a second entrance, and switches an airflow in the tunnel between a first directional airflow from the first entrance to the second entrance and a second directional airflow from the second entrance to the first entrance, A first ventilation device is installed on the first tunnel entrance side and switches between an air supply to send outside air from the first tunnel entrance into the tunnel and an exhaust to exhaust the air in the tunnel to the outside air from the first tunnel entrance; a second ventilation device that is installed on the second tunnel entrance side and switches between an air supply that sends outside air from the second tunnel entrance into the tunnel and an exhaust that exhausts the air in the tunnel to the outside air from the second tunnel entrance; The first ventilation device and the second ventilation device are communicatively connected via wireless communication, The first ventilation device and the second ventilation device each have a ventilation device that generates an airflow using a fan and a motor, and a control unit that controls the operation of the ventilation device, The first ventilation device and the second ventilation device each have an operation-on input unit, One of the first ventilation device and the second ventilation device that has received an operation-on operation from a user is defined as a local device, and the other is defined as a different device, When the device itself has confirmed that its own operating state is off and that the other device is also off, the device turns on the operating state of the device itself and transmits an operation start command to the other device; The other device that has received the operation start command turns on the operation state of the other device and transmits a receipt confirmation to the own device, and the other device starts the other of the air supply operation and the exhaust operation of the ventilation device of the other device, After receiving the receipt confirmation from the other device, the device starts one of the air supply operation and the exhaust operation of the ventilation device of the device. It is characterized by:

[0014] The tunnel air conditioning system according to claim 8, In the tunnel air conditioning system according to claim 7, After confirming a change in the measurement value of the anemometer installed in the tunnel, the device starts one of the air supply operation and the exhaust operation of the ventilation equipment of the device. It is characterized by:

[0015] The tunnel air conditioning system according to claim 9, A tunnel air conditioning system that is installed in a tunnel having a first entrance and a second entrance, and switches an airflow in the tunnel between a first directional airflow from the first entrance to the second entrance and a second directional airflow from the second entrance to the first entrance, A first ventilation device is installed on the first tunnel entrance side and switches between an air supply to send outside air from the first tunnel entrance into the tunnel and an exhaust to exhaust the air in the tunnel to the outside air from the first tunnel entrance; a second ventilation device that is installed on the second tunnel entrance side and switches between an air supply that sends outside air from the second tunnel entrance into the tunnel and an exhaust that exhausts the air in the tunnel to the outside air from the second tunnel entrance; The first ventilation device and the second ventilation device are communicatively connected via wireless communication, The first ventilation device and the second ventilation device each have a ventilation device that generates an airflow using a fan and a motor, and a control unit that controls the operation of the ventilation device, The first ventilation device and the second ventilation device each have an operation-off input unit, One of the first ventilation device and the second ventilation device that has received an operation-off operation from a user is defined as a local device, and the other is defined as a different device, When the device itself has confirmed that its operating state is on and that the other device is also on, the device stops the ventilation device of the device itself and transmits an operation off command to the other device; The control unit of the other device that has received the operation-off command stops the ventilation equipment of the other device and transmits a receipt confirmation to the own device, and then turns off the operation state of the other device; After receiving the receipt confirmation from the other device, the device turns off the operation state of the device. It is characterized by:

[0016] The tunnel air conditioning system according to claim 10, A tunnel air conditioning system that is installed in a tunnel having a first entrance and a second entrance, and switches an airflow in the tunnel between a first directional airflow from the first entrance to the second entrance and a second directional airflow from the second entrance to the first entrance, A first ventilation device is installed on the first tunnel entrance side and switches between an air supply to send outside air from the first tunnel entrance into the tunnel and an exhaust to exhaust the air in the tunnel to the outside air from the first tunnel entrance; a second ventilation device that is installed on the second tunnel entrance side and switches between an air supply that sends outside air from the second tunnel entrance into the tunnel and an exhaust that exhausts the air in the tunnel to the outside air from the second tunnel entrance; The first ventilation device and the second ventilation device are feedback-controlled based on a moving average of the measured values ​​of an anemometer installed in the tunnel and a preset target value of the wind speed so that the wind speed in the tunnel falls within a range set by the target value. It is characterized by: [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a diagram for explaining the configuration of a tunnel air conditioning system according to a first embodiment of the present invention. [Diagram 2] FIG. 4 is a diagram illustrating a first control panel. [Diagram 3] 1 is an overall flow diagram of the operation of the tunnel air conditioning system. [Figure 4] FIG. 4 is a diagram for explaining a procedure for selecting and setting an operation mode. [Diagram 5] FIG. 2 is a diagram for explaining the procedure for starting operation of the tunnel air conditioning system. [Figure 6] FIG. 2 is a diagram for explaining the procedure for starting operation of the tunnel air conditioning system. [Figure 7]FIG. 11 is a diagram for explaining an operation procedure of wind speed feedback control. [Figure 8] FIG. 11 is a diagram for explaining an operation procedure of wind speed feedback control. [Figure 9] FIG. 13 is a diagram for explaining the procedure for stopping the operation of the tunnel air conditioning system. [Figure 10] FIG. 13 is a diagram for explaining the procedure for stopping the operation of the tunnel air conditioning system. [Figure 11] 13 is a diagram illustrating a state in which a pipeline rehabilitation work is performed while changing the direction of the airflow. FIG. [Figure 12] 13 is a diagram illustrating a state in which a pipeline rehabilitation work is performed while changing the direction of the airflow. FIG. [Figure 13] 13 is a diagram illustrating a state in which a pipeline rehabilitation work is performed while changing the direction of the airflow. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be illustrated and described with reference to the reference numerals given to the various elements in the drawings. Each embodiment may be implemented not only alone, but also in combination of two or more embodiments, and the modified examples supplemented in each embodiment may also be applied to the other embodiments. First embodiment A first embodiment of the present invention will be described. The present invention relates to a tunnel work method and a tunnel air conditioning system for efficiently performing work in a tunnel. As a first embodiment, a tunnel air conditioning system will be described. FIG. 1 is a diagram for explaining the configuration of a tunnel air conditioning system according to a first embodiment of the present invention. It is assumed that a tunnel 10 is an existing tunnel that has already been penetrated. For the penetrated tunnel, work such as repair, renovation, rehabilitation, inspection, or firefighting in case of an accident in the tunnel and removal of obstacles occurs. A typical example is a pipe-in-pipe (PIP) method for rehabilitating water supply (water supply, sewerage, agricultural water) pipes, in which a new pipe is installed inside an existing deteriorated pipe to rehabilitate the pipe.

[0019] The tunnel 10 is a long continuous structure, but in order to draw in new pipes, vertical shafts are provided every few hundred meters or every few kilometers, and these serve as portals that connect to the ground. In other words, in a certain section, the tunnel has a first portal 11, which is the portal on the first side, and a second portal 12, which is the portal on the second side. The tunnel air-conditioning system 100 includes ventilation devices 110, 120 and environmental measurement devices 210, 220.

[0020] The tunnel air conditioning system 100 comprises, as ventilation devices, a first ventilation device 110 installed on the first tunnel entrance 11 side and a second ventilation device 120 installed on the second tunnel entrance 12 side. The first ventilation device 110 and the second ventilation device 120 differ in their installation locations, but have a common configuration. The configuration will be explained using the first ventilation device 110 as an example.

[0021] The first ventilation device 110 includes a first ventilator 111 , a first air duct 112 , a first air gate 113 , a first operation panel 114 , and a first control unit 115 .

[0022] The first ventilator 111 has a fan and a motor. Here, it is assumed that the air supply operation and the exhaust operation are switched by switching the rotation direction of one fan, but an air supply dedicated device and an exhaust dedicated device may be provided separately and used by switching between the devices.

[0023] The first ventilator 111 is installed outside the shaft, and the inside of the tunnel 10 is connected to the first ventilator 111 by a first air duct 112.

[0024] The first wind gate 113 is a door installed near the entrance as a partition between the adjacent tunnel section. Closing at least one of the first wind gate 113 or the second wind gate (the wind gate on the second entrance 12 side) 123 improves ventilation efficiency. Note that, under the construction conditions of the second embodiment described below, the wind gate on the air supply side cannot be closed all the time, so when the wind gate is closed, it is assumed that the wind gate on the exhaust side is closed. The wind gate may be opened and closed manually, or a controller (for example, the first control unit 115 of the first ventilation device 111) may control the opening and closing of the wind gate.

[0025] The first operation panel 114 is installed near the entrance 11 inside the tunnel 10. FIG. 2 shows an example of the first operation panel 114. The first operation panel 114 is provided with an on / off button 131 / 134 and an operation mode selection button 132 / 133. The on / off button 131 / 134 is a button (input unit) for switching the operation state of the first ventilation device 110 on and off. The on button 131 and the off button 134 may be separate, or may be combined into one button. Also, only the off button 134 may be provided, and the on button 131 may also serve as the operation mode selection button 132 / 133. As the operation mode selection button 132 / 133, an air supply operation selection button 132 for selecting an air supply operation and an exhaust operation selection button 133 for selecting an exhaust operation are provided.

[0026] It is preferable that the first operation panel 114 has a display panel for displaying various messages. Note that the display panel may be a touch panel instead of buttons.

[0027] The first control unit 115 is a control device for the first ventilator 111. The first control unit 115 is communicatively connected to the first ventilator 111 and the first operation panel 114, and receives input operations from the first operation panel 114 to control the operation of the first ventilator 111 of the first control unit 115 itself and transmit and receive signals with the second control unit 125 of the other device (second ventilation device) 120. Here, the first control unit 115 has a wireless communication device and transmits and receives signals with the second control unit 125 of the other device (second ventilation device) 120 by wireless communication. It is assumed that communication with the monitoring monitor 300 is also performed by wireless communication. Note that the communication connection between the first control unit 115, the first ventilator 111, and the first operation panel 114 in one first ventilation device 110 may be a wired connection. A communication cable can be laid in the shaft. On the other hand, the distance between one entrance (first entrance 11) and the other entrance (second entrance 12) is several hundred meters or several kilometers, there are construction equipment inside the tunnel, new pipes must be installed inside the tunnel, and if a communication cable is installed between the first entrance (first entrance 11) and the other entrance (second entrance 12) along the entire length of the tunnel 10, the communication cable may be broken when the reeling pipe is expanded, so it is difficult to connect the control units between the device (first ventilation device 110) and the other device (second ventilation device 120) by laying a wired cable inside the tunnel. Furthermore, the ground above the tunnel 10 is often a road in urban areas, so it is difficult to lay a wired cable on the ground. Furthermore, in the case of cultivated land, it would be an obstacle to cultivation, and in forests, etc., there is a concern that the cable may be broken by animals. Therefore, it is desirable that communication between the device itself (the first ventilation device 110) and the other device (the second ventilation device 120), and communication between the device itself 110 (or the other device 120) and the monitoring monitor 300 be wireless communication via a wireless communication device.

[0028] The tunnel air-conditioning system 100 comprises, as environmental measuring devices 210, 220, a first environmental measuring device 210 installed on the first tunnel entrance 11 side and a first environmental measuring device 220 installed on the second tunnel entrance 12 side. The first environmental measuring device 210 and the second environmental measuring device 220 differ in their installation locations, but have a common configuration. The configuration will be explained using the first environmental measuring device 210 as an example.

[0029] The first environment measuring device 210 includes a first anemometer 211 and a first dust meter 212 . The first anemometer 211 is installed near the first tunnel entrance 11, but is preferably installed at an appropriate distance (several meters or a dozen meters, and if the airflow is still not stable, several tens of meters, for example 50 meters) inside the tunnel entrance 11 so as to be less susceptible to the effects of turbulent airflow. The first anemometer 211 may transmit the wind speed values ​​measured every moment to the control unit (first control device 115) of its own device (first ventilation device 110), or may transmit the average (moving average) wind speed per (management) unit time to the control unit 115. Similarly, the first dust meter 212 will also be installed. The first environment measuring device 210 may be any other gas concentration meter, such as a carbon dioxide concentration meter, a carbon monoxide concentration meter, an oxygen concentration meter, a hydrogen sulfide meter, etc. It is assumed that communication between the first environment measuring device 210 and the first control unit 115 is wireless communication via a wireless communication device.

[0030] It is desirable that the anemometer 211 is capable of determining the wind direction (airflow direction) in addition to the absolute value of the wind speed. However, for example, in the first embodiment, the lower limit of the wind speed is set to 0.8 m / s, and both entrances (first entrance 11, second entrance 12) on both sides of the tunnel 10 are vertical shafts, so that the outdoor airflow does not directly blow into the tunnel 10. In this state, if the wind speed required for underground work sufficiently exceeds the upper limit of 0.3 m / s, which is set by the Japan Meteorological Agency and others as a calm state, it is unlikely that the wind direction will reverse during wind speed control. Therefore, here (with the anemometers 211, 221 used in this tunnel air-conditioning system 100), it is sufficient to know the magnitude of the wind speed even if the wind direction cannot be measured. It is preferable that the wind direction can be set or switched on the operation panel 114 (124) of the ventilation device, and the control target value is controlled based on the magnitude of the wind speed.

[0031] The monitoring monitor 300 is installed in a control room on the ground just outside the tunnel 10, and monitors the operating status of the ventilation devices (first ventilation device 110, second ventilation device 120) and the measured values ​​by the environmental measuring devices (first environmental measuring device 210, second environmental measuring device 220). In addition, when performing feedback control of the air conditioning (wind speed) inside the tunnel, a function of sending a control command to the ventilation devices (first ventilation device 110, second ventilation device 120) based on the measured values ​​(wind speed) by the environmental measuring devices 210, 220 may be added to the monitoring monitor 300. Since the ventilation status inside the tunnel 10 may be monitored from a construction office or the like located away from the tunnel 10, it is preferable that the communication between the monitoring monitor 300, the ventilation devices (first ventilation device 110, second ventilation device 120), and the environmental measuring devices (first environmental measuring device 210, second environmental measuring device 220) be wireless communication via wireless communication devices.

[0032] (Operation of tunnel air conditioning system) The operation of the tunnel air conditioning system will now be explained. FIG. 3 is an overall flow diagram of the operation of the tunnel air conditioning system. First, before turning on the operation state of the tunnel air-conditioning system, the operation mode is selected and set in advance (ST100). Here, the operation mode includes two modes: 1) the operating side supplies air and the other side exhausts air, and 2) the operating side exhausts air and the other side supplies air. In this case, in 1) and 2), the operation mode being on refers to an operation state in which the first ventilator 111 on the operating side and the second ventilator 121 on the other side are controlled in conjunction with each other by instructions from the operating side, and if they are controlled in conjunction with each other, it also includes a state in which at least one of the first ventilator 111 or the second ventilator 121 is stopped. In order to prevent a sudden reversal of the airflow, the tunnel air-conditioning system 100 accepts forced switching of the airflow only when the system is stopped. In addition, if the operation to switch the airflow is accepted during operation, when there is a wireless communication problem (for example, communication loss, etc.), the cooperation of the ventilation devices on both sides is broken, and if the worker does not notice this, it may lead to an accident.

[0033] (Operation mode selection setting) FIG. 4 shows the flow of control performed in selecting and setting the operation mode (ST100). The operation mode selection setting (ST100) can be accepted on either the first operation panel 114 of the first ventilation device 110 or the second operation panel 124 of the second ventilation device 120. The supervisor determines which direction the wind should flow in the tunnel based on a predetermined work plan and the progress of work in the tunnel, and selects the operation mode on the nearest operation panel. For example, the supervisor at the first tunnel entrance 11 presses the air supply operation selection button 132 on the first operation panel 114 of the first ventilation device 110. In other words, the supervisor selects a first directional airflow in which the airflow flows from the first tunnel entrance 11 toward the second tunnel entrance 12.

[0034] When the first control unit 115 of the first ventilation device 110 detects that it has received an operation mode selection operation (ST110), the first control unit 115 checks whether the operation state of the air conditioning system 100 is off or not (ST120). The operation state of the first ventilation device 110 is already recognized because it is the first ventilation device 110 itself. For the operation state of the other device (second ventilation device 120), an inquiry (Ask) is sent to the other device 120, and a response from the control unit (second control unit 125) of the other device (second ventilation device 120) is checked. If the operation state of the first ventilation device 110 is off and the operation state of the other device 120 is off, the operation mode setting is continued, but if it cannot be confirmed that both the first ventilation device 110 and the other device 120 are off, the input operation mode selection operation is discarded. In this case, it is preferable to display a message on the display panel indicating that the operation mode selection operation is not accepted.

[0035] If the operating status of the own device 110 is off, the operating status of the other device 120 should also be off, but the actual status of the other device several hundred meters away is unknown, and there may be unexpected inconveniences such as the power being turned off, it having been removed, it not having been installed yet, etc. Therefore, it is desirable to inquire about the operating status of the other device 120 and reliably receive and confirm the response.

[0036] If the operating status of the own device and the other device is off (ST120: YES), the operating mode of the own device 110 is set according to the instruction (here, the air supply operating mode) (ST130), and a command is sent to the other device 120 to set the corresponding operating mode (here, the exhaust operating mode) (ST140). It is even more preferable to receive a setting completion report (ST150) from the other device 120.

[0037] (Start of operation) Once the selection and setting of the operation mode is completed, operation starts (ST200). The flow of control from the operator pressing the operation-on button 131 to the operation of the other ventilator (125 in the following example) and the operation of the own ventilator (115 in the following example) at the start of operation (ST200) is shown in Figs. 5 and 6. Here, it is assumed that the operation-on button 131 for instructing the start of operation is located on the operation panel 114 separately from the operation mode selection input section (air supply button 132 and exhaust button 133), but the operation mode selection input section (air supply button 132 and exhaust button 133) may also serve as the operation-on input section as the "operation-on input section". In this case, it is assumed that the operation start operation of the air conditioning system starts automatically when the operation mode selection operation is input and the setting of the operation mode is completed.

[0038] The operation to turn on the operation can be accepted by the operation panel 114, 124 of either ventilation device 110, 120. Here, it is assumed that the supervisor presses the operation on button 131 on the first operation panel 114 of the first ventilation device 110 (ST210). The relationship between the parent device (master) that issues the control command and the child device (slave) that operates according to the command of the parent device is such that the ventilation device (in this example, the first ventilation device 110) whose operation on button 131 was operated is the parent device (master), and the other devices are the child devices (slave). Then, until a series of operations stops, it issues commands to the other devices to not only start and stop the ventilation, but also to increase and decrease the air volume. The control unit (first control unit 115) of the own device (first ventilation device 110) confirms that the operation status of both the own device 110 and the other device 120 is off (ST220: YES), and then turns on the operation status of the own device 110 (ST230). Then, an operation start command is transmitted to another apparatus (the second ventilation apparatus 120) (ST240).

[0039] When the other apparatus (second ventilation apparatus 120) receives the operation start command, the other apparatus (second ventilation apparatus 120) turns on the operation state (ST310). At the same time, it transmits a reception confirmation to the other apparatus (here, the first ventilation apparatus 110) (ST320). Then, the other apparatus (second ventilation apparatus 120) starts the operation of the ventilation unit (second ventilation apparatus 125) (ST330). Here, it is assumed that the second ventilation device 120 has already been set to the exhaust operation mode, that is, the second ventilation device 121 performs the exhaust operation.

[0040] The output and wind speed target values ​​at initial start-up will be described later.

[0041] The control unit (first control unit 115) of the own device (first ventilation device 110) may immediately start operation of the ventilator 111 of the own device 110 after sending an operation start command to the other device 120 (ST240). However, here, when the other device 120 receives the operation start command, the ventilator 121 of the other device 120 is operated first, and after checking the change in wind speed of the other device's anemometer 221 (ST260), the ventilator 111 of the own device 110 is started to operate (ST270). (The threshold for determining the change in wind speed is set appropriately.) In addition, when other device 120 receives an operation start command from device 110, the other device 120 may transmit an operation start consent signal to device 110 at the same time as the ventilator 121 of the other device starts operating, and the ventilator 111 of device 110 may start operating (ST270) upon receipt of the operation start consent signal in device 110 (ST250). Furthermore, when other device 120 receives an operation start command from its own device 110, other device 120 only transmits an operation start consent signal from other device 120 to its own device 110, and when its own device 110 receives the operation start consent signal from other device 120, it operates its own device 110 and transmits an operation start signal to other device 120, and when other device 120 receives the operation start signal from its own device 110, it starts operating the ventilator 121 of the other device, so that operation can be started using a double control signal. Here, it is assumed that the first ventilation device 110 is set to an air supplying operation mode, and the first ventilation unit 111 performs the air supplying operation.

[0042] The wind speed values ​​of the anemometers 211, 221 may be directly exchanged between the first control unit 115 and the second control unit 125, but the measurement values ​​of the environmental measuring devices (e.g., the first and second anemometers 211, 221) may be collected in the surveillance monitor 300, and the control units 115, 125 of the ventilation devices 110, 120 may inquire of the surveillance monitor 300.

[0043] If no change in wind speed is confirmed even after a specified time has passed, some kind of error has occurred, so the control unit (first control unit 115) of the device itself (first ventilation device 110) displays a message on the operation panel 114 and also reports it to the monitoring monitor 300.

[0044] (Wind speed feedback control ST400) The flow of control performed in the wind speed feedback control (ST400) is shown in FIG. When the first ventilator 111 of the first ventilation device 110 and the second ventilator 121 of the second ventilation device 120 start operating, feedback control of the first ventilator 111 and the second ventilator 121 is performed so as to achieve a target wind speed. Here, the feedback control is executed by first control unit 115 on the device 110 side. Specifically, the device on which the operation on button 131 is operated commands the other device to increase or decrease the output of the ventilator, with the device acting as the master and the other device as the slave.

[0045] However, feedback control of the first ventilator 111 and the second ventilator 121 may be performed by the second control unit 125 of the second ventilation device 120 or the monitoring monitor 300, without relying on the first control unit 115 on the device 110 itself.

[0046] The target wind speed is set appropriately taking into consideration regulations and the nature of the work. Regarding the lower limit of the target wind speed, from the viewpoint of safety and health, the stronger the wind speed, the better, as it exhausts harmful dust and other particles into the outside air. In this example, the minimum wind speed required for ventilation of the dust generated during arc welding work and the breath of the worker is set to 0.8 m / s. However, on the other hand, the upper limit of the target value of the wind speed is 2.0 m / s according to the welding work prohibition conditions in the common specifications for facility mechanical construction, etc. of the Ministry of Agriculture, Forestry and Fisheries. Furthermore, in this embodiment, the construction is carried out during the winter agricultural off-season, and since the temperature inside the pipe is 10°C or less on some days due to the penetration of the pipe, the upper limit of the wind speed for indoor work at low temperatures, 1.0 m / s, is added in accordance with Article 601, paragraph 2 of the Industrial Safety and Health Regulations, resulting in a maximum wind speed of 1.0 m / s. From the above, in this example, the range of the target wind speed is set to 0.8 m / s or more and less than 1.0 m / s. Taking these points into consideration, and also the difficulty of performing strict wind speed control in a tunnel of several hundred meters or several kilometers, the target wind speed (target wind speed range) is determined. Here, the target wind speed (hereinafter the target value) as the control target value is set to 0.9 m / s, which is the median of the range of the target wind speed, and the allowable error is ±0.1 m / s.

[0047] Since the anemometers 211, 221 are installed near the entrances on both sides, the wind speed measurements from both anemometers may be used together, but here it is assumed that feedback control is performed based on the wind speed measurement from the anemometer 221 on the exhaust side. Note that the time interval for the wind speed feedback control (ST400) is set to one minute, taking into account the time it takes for the wind speed to settle after the air volume is changed. The flow of control performed in the wind speed feedback control (ST400) is shown below with reference to Figures 7 and 8.

[0048] At the first initial operation of the ventilators (first ventilator 111, second ventilator 121), the ventilator in the air supply operation mode (here, the first ventilator 111) starts operation with an initial air volume equivalent to the product of the cross-sectional area and the target air speed, and the ventilator in the exhaust operation mode (the second ventilator 121) starts operation with an initial air volume on the exhaust side that is not 0, but because it consumes a large amount of power when operating from a stopped state (ST401), and starts a timer until one minute later, which is the time for feedback control of the next air volume (ST402). At this time, if the target air volume is close to the maximum air speed, the air volume equivalent to the maximum output may be set as the initial air volume. As a specific example, both the first ventilator 111 and the second ventilator 121 may have a maximum air volume of 150 m 3 / min, and the maximum exhaust volume is 75m 3 At the start of the wind speed management, the first ventilator 111 blows air at a maximum volume of 150 m 3 / min, and the second ventilator 121 blows air at 9 m 3 Ventilation is started from a state in which the exhaust air is discharged at 1000 sq. m / min (ST401). Here, in this example, the initial air volume of the first ventilator 111 on the air supply side is set to the maximum air volume in the air supply because the cross-sectional area of ​​the pipe after the installation of the steel pipe with an inner diameter of 1800 mm in this example is 2.5434 m 2 Since the above equation is true (=(1.8÷2)×(1.8 / 2)×3.14), even if air is sent at the maximum volume without any loss in the duct, the flow rate is 150÷2.5434÷60=0.98 m 3The reason why the initial air volume of the second ventilator 121 on the exhaust side is set to 1 / 8 of the maximum air volume for exhaust is that the ventilator consumes a lot of power when it starts operating, so it is desirable to operate the second ventilator 121 on the exhaust side at the minimum output in the initial state, and one unit of the air volume change on the exhaust side in the feedback control of the air velocity in the duct, which will be described later, is set to 1 / 8 of the maximum air volume, and the air volume steps are set to 0 m 3 / min, so there are 9 levels, including 9m / min, which is 1 unit more wind volume than no wind. 3 / min is the initial state of the exhaust side. Also, the air gates 113, 124 may be open or closed, and if we consider the case where both air gates 113, 124 are closed, it is not appropriate to set the initial air volume of the exhaust unit to zero. In this case, the increase or decrease in the air volume on the exhaust side at one time (one unit) is set to 9 m 3 The reason for setting it at / min is that when the maximum ventilation volume on the exhaust side is divided by 8, the change in wind speed is 9÷2.5434÷60=0.06 m / sec, which is smaller than the allowable error of the target wind speed, 0.1 m / sec, and therefore is considered to be suitable as an increase / decrease value for each feedback control.

[0049] When one minute has elapsed since the timer was started (ST403), the timer is stopped and feedback control is started every minute. In this example, the wind speed measurement value (one-minute moving average) of the second anemometer is compared with the target value (0.9 m / sec) (ST404).

[0050] If the target value-measured value is equal to or greater than 0 (ST404: YES), this means that the actual wind speed in the tunnel is weaker than the target value, and the process proceeds to ST405 in FIG. 7. In this case, if the target value-measured value is equal to or greater than 0.1 (ST405: YES), this means that the actual wind speed is quite weak, and the process proceeds to ST406 in FIG. 7, where the air volume of the ventilator in air supply operation (here, for example, the first ventilator 111) is increased by one level (+19 m 3 / min) (ST407). Here, the set unit is 150 m 3 / min divided by 8 (similar to the unit of 1 during exhaust operation) (150÷8 ≒ 19 m 3 / min, 19 m 3 / min ÷ 2.5434m 2 ÷ 60 = 0.125 m / s. When the ventilation unit in the air supply operation (for example, the first ventilation unit 111 in this case) is at the maximum air supply output (ST406: YES), the exhaust output of the ventilation unit in the exhaust operation (for example, the second ventilation unit 121 in this case) is at the maximum (75 m 3 / min) (ST408: NO), proceed to ST409 in FIG. 7, and reduce the output of the ventilator in exhaust operation (second ventilator 121) by 1 unit (9 m 3 / min) (ST409). Then, the flow returns to the beginning with the determined air volume, and ventilation is performed at the same air volume for one minute (ST402, ST403). ST402-ST409 are repeated in a loop until the wind speed "target value - measured value" is between 0 m / s and less than 0.1 m / s, and eventually the wind speed measured value of the second anemometer, i.e., the wind speed inside the mine, stabilizes within the range of the target wind speed. Because the target wind speed was set to 0.9 m / s, the wind speed should be 0.8 m / s or more.

[0051] If the wind speed is not within the target range even though both the air supply and exhaust are operating at maximum output, an error is reported to a supervisor from the monitor 300, for example (ST410).

[0052] When the target value minus the measured value is less than 0 (ST404: NO), the wind speed inside the tunnel is stronger than the target. In this case, if the target value minus the measured value is even smaller than -0.1 m / s (ST420: YES), the exhaust output of the ventilator in exhaust operation (second ventilator 121) is set to the minimum (9 m in this case). 3 / min) (ST421: NO), the output of the exhaust ventilation unit (second ventilation unit) is set to 1 unit (9 m 3 / min) (ST422). Then, the flow returns to the top (ST402) with the determined air volume, and ventilation is performed at the same air volume for one minute. The exhaust output of the ventilator in exhaust operation (second ventilator 121) is reduced to a minimum (9 m in this case). 3 / min) (ST421: YES), the air output of the ventilation unit in air supply operation (first ventilation unit 111) is set to the minimum (19 m 3 / min) (ST423: NO), the output of the ventilation unit (first ventilation unit 111) in ventilation operation is set to one unit (19 m 3 / min) (ST424). Then, return to the top of the flow (ST401) with the determined air volume, and ventilate at the same air volume for one minute. By repeating this process until the wind speed target value-measured value falls between -0.1 m / sec and 0 m / sec, the wind speed measurement value of the second anemometer 221, i.e., the wind speed inside the tunnel, will eventually stabilize within the range of the target wind speed. Because the target wind speed was set to 0.9 m / sec, the wind speed should be 1.0 m / sec or less.

[0053] If the wind speed is not within the target range (ST423: YES) even though both the air supply and exhaust are operating at minimum output, an error is reported from the monitor 300 to a supervisor, for example. When tunnel 10 is several hundred meters or kilometers long, the outside air pressure and wind speed may be unexpectedly different between first entrance 11 and second entrance 12, and even if ventilators 111, 121 are operating normally, it may not be possible to control the airflow inside the tunnel as desired.

[0054] (Suspension of operation) 9 and 10 show the flow of control performed when the operation of the air conditioning system 100 is stopped (ST500). When the operation of the air conditioning system 100 is stopped (ST500), the operation-off operation can be accepted on the operation panel 114, 124 of either of the ventilation devices 110, 120. Here, it is assumed that a supervisor presses the operation-off button 134 on the first operation panel 114 of the first ventilation device 110 (ST510). The control unit (first control unit 115) of the own device (first ventilation device 110) confirms that the operation state of both the own device 110 and the other device 120 is on (i.e., the own device 110 and the other device 120 are in an interlocking control state) (ST520: YES), and then stops the operation of the ventilator (first ventilator 111) of the own device (first ventilation device 110) (ST530). Then, an operation-off command is transmitted to the other apparatus (the second ventilation apparatus 120) (ST540).

[0055] When the other apparatus (second ventilation apparatus 120) receives the operation-off command (ST550: YES), the other apparatus (second ventilation apparatus 120) stops the operation of the ventilator (second ventilation apparatus 121) (ST610). At the same time, it transmits a reception confirmation to the other apparatus (here, the first ventilation apparatus 110) (ST620). Then, the other apparatus (second ventilation apparatus 120) turns off the operation state (ST630).

[0056] The control unit (first control unit 115) of the own device (first ventilation device 110) sends an operation-off command to the other device 120, then confirms receipt from the other device (second ventilation device 120) (ST550: YES) and turns off the operation state of the own device (first ventilation device) (ST560).

[0057] If you want to change the airflow direction and restart the unit after turning off the operation state, return to the operation mode selection setting, select the operation mode (select the airflow direction), and resume operation.

[0058] Such a tunnel air conditioning system makes it possible to forcibly change the direction of the airflow inside the tunnel. At this time, the above-described feedback control of the wind speed inside the tunnel makes it possible to automatically keep the wind speed inside the tunnel within a certain range. Furthermore, according to this embodiment, it is possible to reliably link the ventilation devices that are separated by several hundred meters or several kilometers, thereby ensuring the safety and hygiene of the workers inside the tunnel.

[0059] Second Embodiment A second embodiment of the present invention will now be described. (Work inside the tunnel) By switching the direction of the airflow with the tunnel air conditioning system described in the first embodiment, harmful work and general work can be performed in parallel, so that work inside the tunnel can be performed efficiently. Here, the pipe-in-pipe (PIP) method, which is one of the pipe rehabilitation methods, will be described as an example. One type of pipe-in-pipe method is the pipe-in-pipe method using a roll-up pipe. The pipe-in-pipe method using a roll-up pipe is a desirable method for pipe rehabilitation because it can rehabilitate an aging pipeline with a small reduction in cross-sectional area since a new pipe with a diameter close to that of the existing pipe can be installed inside. However, since welding (bonding) work is required in the axial and circumferential directions to install a new pipe, harmful substances are generated during the welding (bonding) work. Such work involving the generation of harmful substances (harmful work) is performed by qualified, specialized trained workers wearing protective clothing and dust masks, and no personnel performing other general work are allowed inside the tunnel when harmful work is being performed. Therefore, the pipe-in-pipe method using a roll-up pipe is a construction that takes time (days).

[0060] In this embodiment, we propose that the tunnel air conditioning system controls the direction and speed of the airflow inside the tunnel, ensuring a safe and hygienic environment on the windward side of the area where harmful work is being carried out, and that harmful work and general work can be carried out in parallel inside the tunnel, which can dramatically shorten the construction period.

[0061] The pipe-in-pipe method using rolled-up pipes mainly involves the following three processes: If the rolled-up pipe is made of steel (rolled steel pipe), there is a process of painting the inside of the steel pipe after this, but this process is basically not carried out simultaneously with other processes, either upstream or downstream, in order to prevent dust and other particles from adhering to the painted surface before it dries, so this process is omitted in the explanation of this embodiment. (1) Pull-in installation process (pulling in work) (2) Connection process (connection work) (3) Backfilling process

[0062] (1) In the pulling-in installation process, the new pipe is cut in the axial direction of the pipe and rolled up into a small roll, which is then pulled into the tunnel, placed in the designated position, and spread out to install it. (2) In the connection process, first the cut parts in the axial direction of the pipe are connected (welded) to make a pipe, and then the pipe is pulled to the new pipe that has already been installed and connected in the circumferential direction. If it is a steel pipe, it is welded, and if it is a resin such as PVC pipe, it is bonded with an organic solvent. (3) The backfilling process involves filling the space between the existing old pipe and the new pipe on the inside with mortar or other material.

[0063] The connection process is a harmful task, and is also the most time-consuming critical path. The pull-in installation process and backfilling process are general tasks. As an example, let's assume that one harmful task (connecting one pipe) takes two hours, and one general task (pulling in) takes one hour. In this case, we consider the possibility of controlling the airflow inside the tunnel to carry out the harmful task and general task simultaneously, thereby shortening the total work time (construction period).

[0064] The procedure for pipe rehabilitation will be described with reference to Figures 11, 12, and 13. Note that in Figures 11 to 13, due to space limitations, the tunnel air-conditioning system 100 is shown in a simplified or omitted manner. When rehabilitating a tunnel, construction begins at the center between the first and second portals 11 and 12. In FIG. 11, new pipes are installed from the center of the tunnel, and then new pipes are installed from the center toward both portals. In FIG. 11, welding of the two new pipes that were most recently installed is in progress at both ends of the new pipes that were installed from the center of the tunnel toward the portals on both sides of the first and second portals 11 and 12. At this time, in FIG. 11, a first-direction airflow from the first portal 11 toward the second portal 12 is secured. Then, the first portal 11 side, which is the windward side of the section where welding is being performed, is free of harmful substances, so general work can be performed. At this time, work that can be performed on the first portal 11 side, which is the windward side of the section where welding is being performed, is called first-side safe work. That is, the new pipe can be pulled in from the first portal 11, transported through the tunnel, and spread out and placed at the next installation position.

[0065] Then, as shown in FIG. 12, the direction of the airflow is changed to ensure a second-direction airflow from the second pit entrance 12 to the first pit entrance 11. Then, since there are no harmful substances on the second pit entrance 12 side, which is the windward side of the section where welding is being performed, general work can be performed. In this case, work that can be performed on the second pit entrance 12 side, which is the windward side of the section where welding is being performed, is called second-side safe work. That is, a new pipe can be pulled in from the second pit entrance 12 and transported through the tunnel, and spread out and placed at the next installation position. Next, as shown in FIG. 13, a first-direction airflow from the first pit entrance 11 to the second pit entrance 12 is ensured, and since there are no harmful substances on the first pit entrance 11 side, which is the windward side, general work (e.g., pulling in and installation) can be performed.

[0066] As a result, while welding work is being carried out, the airflow inside the tunnel is switched between a first direction airflow where the air flows from the first tunnel entrance 11 to the second tunnel entrance 12, and a second direction airflow where the air flows from the second tunnel entrance 12 to the first tunnel entrance 11, and by carrying out the new pipe drawing work on the upwind side of the airflow, the next new pipe to be installed and fixed can be brought in from the tunnel entrances on both sides. And since the drawing work has already been completed, the next welding work can be carried out without any waiting time. In this way, the construction period can be drastically shortened compared to the conventional method.

[0067] In the above example, it was assumed that the hazardous work would take longer than the regular work. However, even if the opposite were true and the regular work took longer than the hazardous work, the construction period could still be shortened if the air current was redirected so that the regular work was upwind while the regular work continued, and the hazardous work could be carried out simultaneously on the downwind side.

[0068] The present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit and scope of the present invention. In the above embodiment, the selection of the operation mode (selection of the airflow direction) and switching are performed manually by a monitor using a control panel. However, if the time schedule or daily schedule of the work content is determined in advance, an operation program can be prepared accordingly, and the operation program can be stored, for example, in the monitor, the first control unit, or the second control unit, so that starting / stopping of operation and switching of modes (airflow direction) can be performed automatically. Furthermore, in this example, when increasing the airflow rate, the airflow rate of the blower is first maximized and then the airflow rate of the exhaust fan is increased, but it is also possible to maximize the airflow rate of the exhaust fan first and then maximize the airflow rate of the blower. Similarly, in this example, when decreasing the airflow rate, the airflow rate of the exhaust fan is first minimized and then the airflow rate of the blower is decreased, but it is also possible to minimize the airflow rate of the blower and then decrease the airflow rate of the exhaust fan. And, regarding the minimum airflow rate of the blower and exhaust fan, taking into account that they consume a large amount of power when started up, the blower has a minimum value of 19 m 3 / min, exhaust fan is 9m 3 / min, but to ensure a larger range of air volume changes, the minimum output of the blower and exhauster is set to 0 m 3 / min may also be used. [Explanation of symbols]

[0069] 10. Tunnel 11 First well mouth 12 Second well mouth 100 Tunnel air conditioning system 110 First Ventilation System 111 First Ventilator 112 First Wind Pipe 113 Daiichifumon 114 First operation panel 131 On button 132 Air supply operation selection button 133 Exhaust operation selection button 134 Off button 115 First Control Section 120 Secondary Ventilation System 121 Second Ventilator 122 Second wind pipe 123 Second wind gate 124 Second operation panel 125 Second Control Section 210 First environment measurement device 211 First anemometer 212 First dust meter 220 Second environment measuring device 221 Second anemometer 222 Second dust meter 300 Surveillance Monitor

Claims

1. A method for working inside a tunnel, the method comprising the steps of: In carrying out hazardous work that emits harmful substances and general work that does not emit harmful substances within the tunnel, a first-side safety work in which the general work is carried out in parallel on a first side that is upwind of the hazardous area where the hazardous work is being carried out, with the airflow in the tunnel being a first-direction airflow from the first tunnel entrance toward the second tunnel entrance; and second-side safety work, in which the general work is carried out in parallel on the second side, which is upwind of the hazardous area where the hazardous work is being carried out, with the airflow in the tunnel being a second-direction airflow from the second tunnel entrance toward the first tunnel entrance. The work inside the tunnel is carried out by switching between the first side safety work and the second side safety work on an hourly basis. A method for working inside a tunnel.

2. In the tunnel work method according to claim 1, An air conditioning system is installed in the tunnel, which switches the airflow in the tunnel between a first direction airflow from the first entrance to the second entrance and a second direction airflow from the second entrance to the first entrance; The airflow in the tunnel is switched between the first directional airflow and the second directional airflow by the air conditioning system; The work inside the tunnel is carried out by switching between the first side safety work and the second side safety work on an hourly basis. A method for working inside a tunnel.

3. In the tunnel work method according to claim 1, Work is started in the tunnel in a region at or near the center between the first and second entrances, and then work is carried out in parallel toward both the first and second entrances. A method for working inside a tunnel.

4. In the tunnel work method according to claim 1, The general work is the work of drawing new pipes into the tunnel, The harmful work is the work of fixing the new pipe that has been pulled in. A method for working inside a tunnel.

5. A tunnel air conditioning system which is installed in a tunnel having a first entrance and a second entrance and switches airflow within the tunnel between a first directional airflow from the first entrance to the second entrance and a second directional airflow from the second entrance to the first entrance, A first ventilation device is installed on the first tunnel entrance side and switches between an air supply to send outside air from the first tunnel entrance into the tunnel and an exhaust to exhaust the air in the tunnel to the outside air from the first tunnel entrance; a second ventilation device that is installed on the second tunnel entrance side and switches between an air supply that sends outside air from the second tunnel entrance into the tunnel and an exhaust that exhausts the air in the tunnel to the outside air from the second tunnel entrance; The first ventilation device and the second ventilation device are communicatively connected via wireless communication, The first ventilation device and the second ventilation device are controlled in a linked manner by an instruction from the first device to the other device, with one device being a local device and the other device being a separate device operated by a user. A tunnel air conditioning system.

6. A tunnel air conditioning system that is installed in a tunnel having a first entrance and a second entrance, and switches airflow within the tunnel between a first directional airflow from the first entrance to the second entrance and a second directional airflow from the second entrance to the first entrance, A first ventilation device is installed on the first tunnel entrance side and switches between an air supply to send outside air from the first tunnel entrance into the tunnel and an exhaust to exhaust the air in the tunnel to the outside air from the first tunnel entrance; a second ventilation device that is installed on the second tunnel entrance side and switches between an air supply that sends outside air from the second tunnel entrance into the tunnel and an exhaust that exhausts the air in the tunnel to the outside air from the second tunnel entrance; The first ventilation device and the second ventilation device are communicatively connected via wireless communication, The first ventilation device and the second ventilation device each have, as an operation mode selection means, an air supply operation selection input unit that selects an air supply operation and an exhaust operation selection input unit that selects an exhaust operation, One of the first ventilation device and the second ventilation device that has received an operation mode selection operation from a user is defined as a local device, and the other is defined as a different device, When the device itself has confirmed that its own operation state is off and that the other device is also off, the device sets the operation mode of the device itself to one of an air supply operation mode and an exhaust operation mode in accordance with an operation mode selection operation received from a user, and transmits an operation mode setting command to the other device to set the operation mode to the other of the air supply operation mode and the exhaust operation mode; The other device sets the other of the air supply operation mode and the exhaust operation mode in accordance with the received operation mode setting command. A tunnel air conditioning system.

7. A tunnel air conditioning system which is installed in a tunnel having a first entrance and a second entrance and switches airflow within the tunnel between a first directional airflow from the first entrance to the second entrance and a second directional airflow from the second entrance to the first entrance, A first ventilation device is installed on the first tunnel entrance side and switches between an air supply to send outside air from the first tunnel entrance into the tunnel and an exhaust to exhaust the air in the tunnel to the outside air from the first tunnel entrance; a second ventilation device that is installed on the second tunnel entrance side and switches between an air supply that sends outside air from the second tunnel entrance into the tunnel and an exhaust that exhausts the air in the tunnel to the outside air from the second tunnel entrance; The first ventilation device and the second ventilation device are communicatively connected via wireless communication, The first ventilation device and the second ventilation device each have a ventilation device that generates an airflow using a fan and a motor, and a control unit that controls the operation of the ventilation device, The first ventilation device and the second ventilation device each have an operation-on input unit, One of the first ventilation device and the second ventilation device that has received an operation-on operation from a user is defined as a local device, and the other is defined as a different device, When the device itself has confirmed that its own operating state is off and that the other device is also off, the device turns on the operating state of the device itself and transmits an operation start command to the other device; The other device that has received the operation start command turns on the operation state of the other device and transmits a receipt confirmation to the own device, and the other device starts the other of the air supply operation and the exhaust operation of the ventilation device of the other device, After receiving the receipt confirmation from the other device, the device starts one of the air supply operation and the exhaust operation of the ventilation device of the device. A tunnel air conditioning system.

8. In the tunnel air conditioning system according to claim 7, After confirming a change in the measurement value of the anemometer installed in the tunnel, the device starts one of the air supply operation and the exhaust operation of the ventilation equipment of the device. A tunnel air conditioning system.

9. A tunnel air conditioning system that is installed in a tunnel having a first entrance and a second entrance, and switches airflow within the tunnel between a first directional airflow from the first entrance to the second entrance and a second directional airflow from the second entrance to the first entrance, A first ventilation device is installed on the first tunnel entrance side and switches between an air supply to send outside air from the first tunnel entrance into the tunnel and an exhaust to exhaust the air in the tunnel to the outside air from the first tunnel entrance; a second ventilation device that is installed on the second tunnel entrance side and switches between an air supply that sends outside air from the second tunnel entrance into the tunnel and an exhaust that exhausts the air in the tunnel to the outside air from the second tunnel entrance; The first ventilation device and the second ventilation device are communicatively connected via wireless communication, The first ventilation device and the second ventilation device each have a ventilation device that generates an airflow using a fan and a motor, and a control unit that controls the operation of the ventilation device, The first ventilation device and the second ventilation device each have an operation-off input unit, One of the first ventilation device and the second ventilation device that has received an operation-off operation from a user is defined as a local device, and the other is defined as a different device, When the device itself has confirmed that its operating state is on and that the other device is also on, the device stops the ventilation device of the device itself and transmits an operation off command to the other device; The control unit of the other device that has received the operation-off command stops the ventilation equipment of the other device and transmits a receipt confirmation to the own device, and then turns off the operation state of the other device; After receiving the receipt confirmation from the other device, the device turns off the operation state of the device. A tunnel air conditioning system.

10. A tunnel air conditioning system which is installed in a tunnel having a first entrance and a second entrance and switches airflow within the tunnel between a first directional airflow from the first entrance to the second entrance and a second directional airflow from the second entrance to the first entrance, A first ventilation device is installed on the first tunnel entrance side and switches between an air supply to send outside air from the first tunnel entrance into the tunnel and an exhaust to exhaust the air in the tunnel to the outside air from the first tunnel entrance; a second ventilation device that is installed on the second tunnel entrance side and switches between an air supply that sends outside air from the second tunnel entrance into the tunnel and an exhaust that exhausts the air in the tunnel to the outside air from the second tunnel entrance; The first ventilation device and the second ventilation device are feedback-controlled based on a moving average of the measured values ​​of an anemometer installed in the tunnel and a preset target value of the wind speed so that the wind speed in the tunnel falls within a range set by the target value. A tunnel air conditioning system.

Images