JPH10246100A - Tunnel ventilation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to measure the wind flowing in a tunnel, wind speed, etc., without using WI meter (wind/anemometer), plan to make a tunnel ventilation system at a low cost and, at the same time, to prevent the lowering of ventilation efficiency in the tunnel and the uncontrollability of ventilation, etc., to control economically and efficiently the number of jet fans to be operated and the direction of rotation of them. SOLUTION: The wind flowing in a tunnel and wind speed are detected on the basis of the direction of rotation and revolution speed of a jet fan 2 in a stopping state among jet fans 2, and ventilation quantity necessary for keeping air in the tunnel in a state set in advance is calculated by a ventilation controller 5 by means of results of the detection. Based on the ventilation quantity, forward command, reverse command and stop command, etc., are calculated to operate the jet fans installed in the tunnel, and the inside of the tunnel is ventilated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel ventilation system for performing ventilation in a tunnel provided on a motorway, and more particularly, measures a wind direction and a wind speed required for ventilation in a tunnel more accurately. The present invention relates to a tunnel ventilation system that optimally controls ventilation in a tunnel.

[0002]

2. Description of the Related Art In recent years, as a ventilation control method for a tunnel,
From the viewpoints of energy saving, cost saving, ease of realization, and the like, a vertical flow ventilation system that ventilates in a direction in which air in a tunnel flows is often used regardless of the size of the tunnel.

FIG. 2 is an overall configuration diagram showing an example of a tunnel ventilation system using such a vertical flow ventilation system.

The tunnel ventilation system 101 shown in FIG.
Are arranged in a tunnel 102 and measure a state of air in the tunnel 102, and a sensor group 103 is arranged in an electric room arranged outside the tunnel 102 and obtained by a measurement operation of the sensor group 103. Based on the measurement results, the ventilation control required to maintain the air in the tunnel 102 in a preset state is calculated, and a forward rotation command, a reverse rotation command, a stop command, etc. are generated based on the ventilation rate. The device 104 is disposed in a ceiling or the like in the tunnel 102, and rotates in the normal rotation direction and the reverse rotation direction based on the normal rotation command, the reverse rotation command, the stop command, and the like output from the ventilation control device 104. A plurality of jet fans 105 for performing ventilation are provided.

[0005] A sensor group 103 is arranged at a predetermined location in the tunnel 102, and a VI meter (fume transmittance meter) 106 for measuring the degree of contamination and transparency of the air in the tunnel 102.
And CO for measuring the concentration of carbon monoxide in the tunnel 102
And a WI meter (wind direction / velocity meter) 108 for measuring the direction and flow velocity of the air flowing in the tunnel 102.
The pollution degree, transparency, carbon monoxide concentration, wind direction, and wind speed of the air in 2 are measured, and the measurement results are supplied to the ventilation control device 104.

[0006] The ventilation control device 104 includes an AI board (analog board) that captures each measurement result output from the sensor group 103 and a DI board (digital board) that captures the operation state (forward rotation state, reverse rotation state) of each jet fan 105. An input board), a CPU board (computer board) for performing calculations necessary for ventilation control based on the operating state of each jet fan 105 captured by the DI board, and each measurement result captured by the AI board, and a CPU board A DO board (digital output board) for generating a forward rotation command, a reverse rotation command, a stop command, and the like based on the calculation result of the board, and rotating the jet fan 105 forward, reverse, and stop, is provided. Of each of the jet fans 105 and the measurement results output from the
Air pollution, nature,
The amount of fog caused by the weather, the direction of the air flowing through the tunnel 102, the wind speed, and the like are calculated to what extent they deviate from a preset reference value, and based on the ventilation amount obtained in this calculation process, The operation number and the rotation direction of each jet fan 105 are calculated, and each jet fan 105 to be operated is rotated in one of the normal rotation direction and the reverse rotation direction to improve the pollution concentration in the tunnel 102. .

At this time, the tunnel ventilation system 101
Since the ventilation in the tunnel 102 is performed using the vertical flow ventilation method, the WI meter (wind direction / velocity meter) 1
08, the direction and the flow velocity of the air flowing through the tunnel 102 are measured, and the rotation of each jet fan 105 to be operated is controlled so as not to oppose the flow of the air flowing through the tunnel 102. Decide the direction to reduce power consumption and improve ventilation efficiency.

[0008]

However, the above-mentioned conventional tunnel ventilation system 101 has the following problems.

In such a tunnel ventilation system 101, the tunnel 10 is used because of the use of a longitudinal flow ventilation system.
Since the number of WI meters 108 provided in 2 greatly affects the ventilation control accuracy, it is desirable to increase the number of WI meters 108 provided in tunnel 102.

However, in an actual system, one WI meter 108 is usually installed in a one-way tunnel, and one WI meter 108 is installed in a one-way tunnel, and one WI meter 108 is installed in a one-way tunnel.
Since only two WI meters 108 are installed, and the installation location of the WI meter 108 is limited to the side wall surface in the tunnel 102, the existing WI meter 108 is installed.
, The direction of the air flowing through the tunnel 102,
There is a problem that it is difficult to accurately measure the flow velocity and the like, and it is difficult to operate the number of jet fans 105 to be controlled and the rotation direction economically and efficiently.

Further, since the number of WI meters 108 provided in tunnel 102 is small,
When 08 fails, the measurement results such as the wind direction and wind speed required for ventilation control are insufficient, and the ventilation efficiency in the tunnel 102 is reduced. In the worst case, the wind direction and wind speed cannot be measured. As a result, ventilation control in the tunnel 102 may not be performed.

In view of the above circumstances, the present invention can measure the direction and speed of wind flowing in a tunnel without using a measuring device such as a WI meter dedicated to measuring the wind direction and wind speed. As a result, the cost of the system can be reduced as much as the WI meter is not used, and the direction and speed of the wind flowing in the tunnel can be measured at multiple points. To provide a tunnel ventilation system that can economically and efficiently control the number of operating jet fans and the direction of rotation while avoiding a decrease in ventilation efficiency and inability to control ventilation in the tunnel due to the like. It is an object.

[0013]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a tunnel ventilation system for performing ventilation in a tunnel by rotating a jet fan provided in the tunnel forward or backward. Means for converting the generated power obtained by the self-propelled rotation at the time of stopping the jet fan into a wind direction and a wind speed amount, and a means for controlling the operation of the jet fan by using the wind direction and the wind speed amount It is characterized by:

In the above configuration, according to the present invention, the generated power generated by the self-propelled rotation of the jet fan is converted into a wind direction,
By converting the wind speed and the wind direction and the wind speed to control the operation of the jet fan, the wind direction and the wind speed can be controlled without using a measuring device such as a WI meter that exclusively measures the wind direction. It is possible to measure the direction of the flowing wind, the wind speed, etc., thereby reducing the cost of the system because the WI meter is not used. In addition, the direction, wind speed, etc. of the wind flowing in the tunnel at multiple points In addition to being able to measure, avoiding a decrease in ventilation efficiency in the tunnel due to insufficient measurement, measurement failure, etc. To control.

[0015]

FIG. 1 is a circuit diagram showing an embodiment of a tunnel ventilation system according to the present invention.

The tunnel ventilation system 1 shown in FIG.
A plurality of jet fans 2 attached to a ceiling portion of a tunnel (not shown) to rotate in a rotation direction according to a phase direction of the electric power to ventilate the tunnel when electric power is supplied; When the jet fan 2 is stopped, the rotation direction and rotation speed of each of the jet fans 2 are detected to generate a wind direction detection signal (forward rotation detection signal or reverse rotation detection signal) and a wind direction / wind speed detection device 3. And a sensor group 4 arranged in the tunnel and measuring the state of the air in the tunnel, and a sensor group 4 arranged in an electric room arranged outside the tunnel to measure the operation of the sensor group 4 and the wind direction / wind speed detection device 3. A ventilation control device 5 that generates a forward rotation command, a reverse rotation command, a stop command, and the like based on each measurement result obtained by the detection operation, a wind direction detection signal, and a wind speed detection signal, and outputs from the ventilation control device 5. A three-phase voltage in the forward direction and a three-phase voltage in the reverse direction are generated from the three-phase voltage supplied from the three-phase power supply line 6 based on the forward command, the reverse command, the stop command, and the like. A jet fan driving device 7 for supplying the fan 2 to the fan 2.

In the tunnel ventilation system 1, the direction and speed of the wind flowing in the tunnel are detected based on the rotation direction and rotation speed of the jet fan 2 that is stopped among the jet fans 2, Based on this detection result and the state of the air in the tunnel obtained by the sensor group 4, the ventilation control device 5 calculates the amount of ventilation required to keep the air in the tunnel in a preset state, Based on the ventilation amount, a forward rotation command, a reverse rotation command, a stop command, and the like are generated, and each jet fan 2 provided in the tunnel is operated to ventilate the inside of the tunnel.

In this case, the sensor group 4 is disposed at a predetermined place in the tunnel, and measures a pollution degree and transparency of air in the tunnel, a VI meter (fume transmittance meter) 8, and a carbon monoxide in the tunnel. A CO meter (carbon monoxide concentration meter) 9 for measuring the concentration is provided, which measures the degree of pollution, transparency, and carbon monoxide concentration of the air in the tunnel, and sends these measurement results to the ventilation control device 5. Supply.

The wind direction / wind speed detecting device 3 includes a plurality of relay contacts 1 which are closed when each jet fan 2 is stopped by the jet fan driving device 7.
When the relay contacts 0 and 11 and these relay contacts 10 and 11 are closed, the phase direction of the three-phase voltage obtained by the power generation operation of the corresponding jet fan 2 is detected, and this is the positive direction. When the relay contact 12 is closed, a forward rotation detection signal (“1” signal) is generated. When the phase direction of the three-phase voltage is negative, the relay contact 12 is opened. A plurality of phase rotation detectors 13 that generate a reverse rotation detection signal (“0” signal) and a three-phase voltage obtained by the power generation operation of the corresponding jet fan 2 when each relay contact 10, 11 is closed. , A plurality of converters 15 that take in the three-phase voltages via the respective resistors 14 and convert them into a DC voltage, and convert the DC voltage output from each of the converters 15 into a ventilation control device 5.
And a plurality of converters 16 that convert the current into a DC current (wind speed detection signal) in a current value range (mA range) that can be supplied to the power supply.

When the jet fan 2 in a stopped state among the jet fans 2 is rotated by the air flowing through the tunnel to generate a three-phase voltage,
The phase rotation detector 13 detects the phase direction of the three-phase voltage, generates a normal rotation detection signal or a reverse rotation detection signal indicating the flow direction of the air (wind direction), and supplies this to the ventilation control device 5 and the converter. The three-phase voltage is converted into a DC current (wind speed detection signal) by the converter 14 and the converter 15 and supplied to the ventilation control device 5.

The ventilation control device 5 captures each measurement result output from the sensor group 4 and captures the wind speed detection signal output from the wind direction / wind speed detection device 3. 2 operation state (forward rotation state, reverse rotation state)
DI board (digital input board) 18 for receiving a normal rotation detection signal or a reverse rotation detection signal output from wind speed detection device 3
A CPU board (computer board) 19 for performing calculations required for ventilation control based on the operating state and wind direction of each jet fan 2 taken in by the DI board 18, each measurement result taken in by the AI board, and wind speed. , This CPU
DO board (digital output board) 2 for generating a forward rotation command, a reverse rotation command, a stop command, etc. based on the calculation result of the board 19
0.

Each measurement result output from the sensor group 4, the operation state of each jet fan 2, and a wind speed detection signal, a normal rotation detection signal or a reverse rotation detection signal output from the wind direction / wind speed detection device 3 are calculated. How much deviation from the preset reference values, such as air pollution due to exhaust gas from vehicles passing through the tunnel, the amount of fog generated by nature, weather, etc., the direction of air flowing through the tunnel, the wind speed, etc. Is calculated, and based on the ventilation volume obtained by this calculation processing, the number of operating and the rotating direction of each jet fan 2 are calculated, and based on the calculation result, the normal rotation command for each jet fan 2 to be operated is given. , A reverse rotation command and a stop command are generated and supplied to the jet fan driving device 7.

When the forward rotation command is output from the ventilation control device 5, the jet fan driving device 7 closes the corresponding relay contact 21 to reduce the three-phase voltage supplied from the three-phase power supply line 6. A plurality of forward rotation relays 22 that generate three-phase voltages in the forward rotation direction and supply the three-phase voltages to the corresponding jet fan 2, and when a reverse rotation instruction is output from the ventilation control device 5, the corresponding relay contacts 23 are connected. In the closed state, a plurality of reverse rotation relays 24 are provided to generate a three-phase voltage in the reverse direction from the three-phase voltage supplied from the three-phase power supply line 6 and supply the generated three-phase voltage to the corresponding jet fan 2. When a normal rotation command is output to each jet fan 2 from the control device 5, a three-phase voltage in the normal rotation direction is generated, and the jet fan 2 specified by the normal rotation command is rotated in the normal rotation direction,
When a reverse rotation command is output from the ventilation control device 5 to each jet fan 2, a three-phase voltage in the reverse rotation direction is generated, and the jet fan 2 specified by the reverse rotation command is rotated in the reverse rotation direction. Further, the jet fan 2 to which neither the normal rotation command nor the reverse rotation command is output from the ventilation control device 5 (the jet fan to which the stop command has been issued) is set in an open state to be rotatable.

Next, referring to the circuit diagram shown in FIG.
A ventilation operation in a tunnel according to this embodiment will be described.

Now, assuming that the three jet fans 2 are all driven to rotate in the normal rotation direction to ventilate the inside of the tunnel, the ventilation of the first to third jet fans 2 is performed. In operation, the air in the tunnel is ventilated, the pollution concentration in the tunnel is sequentially reduced, and the transparency is sequentially increased.

When the pollution degree and the transparency in the tunnel reach the preset reference pollution degree and the reference transparency,
This is detected by the ventilation control device 5 based on the measurement results of the VI meter 8 and the CO meter 9, and a forward rotation command is issued to one of the currently operated jet fans 2, for example, the first jet fan 2. It is released. As a result, the supply of the three-phase voltage to the first jet fan 2 is stopped by the jet fan driving device 7, and the first jet fan 2 is opened, and the rotation is continued for a while with the inertial energy up to that time.

After that, the power supply of the three-phase voltage to the first jet fan 2 is stopped, and after a certain period of time, the inertia energy of the first jet fan 2 becomes zero, The jet fan 2 starts rotating in accordance with the flow of air in the tunnel, starts generating three-phase voltages in accordance with the rotating operation, and a timer provided on the CPU board 19 of the ventilation control device 5 operates as a timer. When the CPU board 19 is up, the AI board 17 and the DI board 18 are controlled by the CPU board 19 to capture the wind speed detection signal and the forward rotation detection signal (or the reverse rotation detection signal) output from the wind direction / wind speed detection device 3. Is started, and based on the wind speed detection signal and the forward rotation detection signal (or the reverse rotation detection signal), the inside of the tunnel obtained by the rotation operation of the first jet fan 2 Wind direction, wind speed is detected.

Next, the ventilation control device 5
Measurement result by the second jet fan 2 and sensor group 4
Based on each measurement result output from the and the operating state of each jet fan 2, the amount of fog generated by air pollution, nature, weather, etc. due to the exhaust gas of the automobile passing through the tunnel,
It is calculated how much the direction of the air flowing in the tunnel, the wind speed, etc. deviate from a preset reference value, and based on the ventilation volume obtained in this calculation process, the number of operating and rotating The direction is calculated, and a forward rotation command, a reverse rotation command, and a stop command are generated for each jet fan 2 to be operated.
, Ventilation processing in the tunnel is performed.

Further, when the ventilation processing in the tunnel is being performed by the second jet fan 2 and the third jet fan 2, the contamination concentration in the tunnel increases and the transparency decreases. Or when the wind speed in the tunnel decreases, the ventilation control device 5 detects this, and generates a forward rotation command (or a reverse rotation command) for the first jet fan 2 which is currently stopped. Is done. Thus, the supply of the three-phase voltage to the first jet fan 2 is started by the jet fan driving device 7, and the wind direction and the wind speed using the first jet fan 2 by the wind direction / wind speed detection device 3 are measured. The measurement operation is stopped.

Thus, in this embodiment,
Based on the rotation direction and rotation speed of the stopped jet fan 2 of each jet fan 2, the direction and wind speed of the wind flowing in the tunnel are detected.
Based on the condition of the air in the tunnel obtained by the sensor group 4, the ventilation control device 5 calculates the ventilation required to keep the air in the tunnel in a preset state, and based on this ventilation, , A forward rotation command, a reverse rotation command, a stop command, etc., are generated to operate each jet fan 2 provided in the tunnel, and the inside of the tunnel is ventilated. Instead, it is possible to measure the wind direction and speed of the air flowing through the tunnel, thereby reducing the cost of the entire system.

In this embodiment, the direction and velocity of air flowing through the tunnel are measured by a plurality of jet fans 2 provided in the tunnel, and the measurement results are used to ventilate the tunnel. Since the control is performed, if any one of the jet fans 2 is operable, the direction and speed of the air flowing in the tunnel can be measured by using the jet fan 2, and thereby the ventilation can be performed. It is possible to prevent the control of the ventilation of the tunnel by the control device 5 from being disabled, and to significantly improve the reliability of the control.

Further, by using the jet fan 2 provided at each part in the tunnel, the wind direction and the velocity of the air flowing through the tunnel can be measured finely, whereby the ventilation accuracy at the time of ventilating the tunnel can be measured. And the number of jet fans 2 to be controlled and the direction of rotation can be economically and efficiently operated.

[0033]

As described above, according to the present invention, it is possible to measure the direction and speed of wind flowing in a tunnel without using a measuring device such as a WI meter for exclusively measuring wind direction and wind speed. As a result, the cost of the system can be reduced because the WI meter is not used, and the direction and wind speed of the wind flowing through the tunnel can be measured at a plurality of points. It is possible to economically and efficiently control the operating number and the rotation direction of each jet fan by avoiding a decrease in ventilation efficiency in the tunnel and an inability to control the ventilation due to lack, measurement failure, and the like.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an embodiment of a tunnel ventilation system according to the present invention.

FIG. 2 is an overall configuration diagram showing an example of a general tunnel ventilation system using a longitudinal flow ventilation system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tunnel ventilation system 2 Jet fan 3 Wind direction / wind speed detection device 4 Sensor group 5 Ventilation control device 6 Three-phase power supply line 7 Jet fan drive device 8 VI meter 9 CO meter 10, 11, 12 Relay contact 13 Phase rotation detector 14 Resistance 15 Converter 16 Converter 17 AI board 18 DI board 19 CPU board 20 DO board 21, 23 Relay contact 22 Forward rotation relay 24 Reverse rotation relay

Claims (1)

[Claims] 1. A tunnel ventilation system for ventilating the inside of a tunnel by rotating a jet fan provided in a tunnel in a normal direction or a reverse direction, wherein the generated power obtained by self-propelled rotation when the jet fan is stopped is used. A tunnel ventilation system comprising: means for converting a wind direction and a wind speed amount; and means for controlling the operation of the jet fan using the wind direction and the wind speed amount.