JPH09125898A - Tunnel ventilation control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-reliable ventilation control device. SOLUTION: A tunnel ventilation control device comprises a booster fan 3 arranged in a tunnel 1 and effecting ventilation in one-way, a jet fan 2 arranged in the tunnel 1 and performing ventilation both in forward and reverse directions, and a priority order deciding function 9 to decide the priority order of an ordinary control means 6, an emergency value control means 7 and an exhaust gas discharge means 8. This constitution improves the control efficiency of a tunnel ventilation control device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel ventilation control device for controlling ventilation equipment according to the pollution situation in a straight tunnel.

[0002]

2. Description of the Related Art Smoke emission control of road tunnel ventilation control must be performed smoothly and quickly in order to perform recovery as soon as possible after a fire occurs and the fire is extinguished. For smoke control, the booster fan installed in the tunnel was operated or the jet fan was operated in the forward and reverse directions. However, the smoke emission control when a fire occurred near the entrance of the tunnel was inefficient because the jet fan was operated in reverse to emit smoke.

[0003]

SUMMARY OF THE INVENTION In the present invention, when a fire occurs in a tunnel, the booster fan is operated (exhaust smoke to the outlet side) by the smoke control after the fire is extinguished, or the jet fan is normally rotated. An object of the present invention is to provide a tunnel ventilation control device capable of improving smoke exhaust efficiency by performing (smoke exhaust to the entrance side) and performing smooth and quick recovery.

[0004]

The tunnel ventilation control device of the present invention is capable of ventilating in only one direction, and is installed over substantially the entire area of the tunnel in a direction in which the ventilation direction matches the wind direction of the tunnel. The booster fan can be ventilated in both forward and reverse directions, and the reverse ventilation direction matches the wind direction of the tunnel, and the jet fan installed near the entrance of the tunnel and the air pollution level installed in the tunnel. Normal control means for controlling the operation of the booster fan according to the output value of the pollution concentration meter to be measured, emergency value control means for operating the jet fan in the opposite direction in addition to the booster fan due to an increase in the output of the pollution concentration meter, and a fire After extinguishing the fire, equipped with smoke emission means that outputs either a forward operation command to the jet fan or an operation command to the booster fan depending on the fire spot. It is characterized in that was.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a tunnel ventilation control device of the present invention will be described. In FIG. 1, a booster fan 3 is a ventilator installed in the tunnel 1 to ventilate or exhaust smoke in either the forward wind direction or the backward wind direction, for example, the traveling direction A. The jet fan 2 is a ventilation facility that is installed in the tunnel 1 to ventilate or exhaust smoke in the forward direction, and can perform ventilation or exhaust smoke in the reverse direction although the operating efficiency is inferior to the forward direction. The pollution concentration meter 5 is a measuring device installed in the tunnel 1 to measure the pollution concentration of air. The normal control means 6 has a function of performing normal operation control according to the output value of the pollution concentration meter 5. The emergency value control means 7 has a function of controlling the operation in an emergency according to the output change value of the pollution concentration meter 5. The smoke discharging means 8 has a function of discharging smoke by manual operation after extinguishing a fire. The priority determination function 9 is a function of determining the destination order of the normal control means 6, the emergency value control means 7 and the smoke exhausting means 8, and the normal control means 6, the emergency value control 7, the smoke exhausting means 8 and the priority order. The determination function 9 constitutes the ventilation control device 4. still,
It is also possible to replace the jet fan 2 with a device of the same operation method as the booster fan 3 in the ventilation direction and combine two of them to perform ventilation control in the forward and reverse directions.

That is, this embodiment is capable of ventilating in only one direction, and the booster fan 3 installed almost all over the tunnel in a direction in which the ventilation direction matches the wind direction of the tunnel 1 and the normal and reverse directions. The tunnel 1 can be ventilated in both directions, and the reverse ventilation direction is the same as the normal wind direction of the tunnel 1.
Jet fan 2 installed near the entrance of the building and a pollution concentration meter 5 installed in the tunnel to measure the air pollution level
The normal control means 6 for controlling the operation of the booster fan 3 according to the output value of the, the emergency value control means 7 for operating the jet fan 2 in the reverse direction in addition to the booster fan 3 due to the increase in the output of the pollution concentration meter, and after the fire extinguishing The smoke exhausting means 8 for outputting either a forward operation command to the jet fan 2 or an operation command to the booster fan 3 according to the fire spot.
And a tunnel ventilation control device comprising:

The ventilation arithmetic processing unit installed in the tunnel ventilation control equipment has an input function 10 for inputting various digital signals and analog signals in the tunnel, and a fire detecting a fire occurrence place in the tunnel 1. A generation section detection function 11, a normal (level) control means 6 for performing ventilation calculation based on the measured value of pollution concentration, and an emergency value control means 7 for performing ventilation calculation when the measured value of pollution concentration suddenly deteriorates.
Smoke exhausting means 8 which is manually operated by an operator after extinguishing a fire, and a priority determination (processing) function 9 capable of outputting control outputs from a plurality of control functions in order of priority.
It has. Further, between the input function 10 and the normal control means 6, there is a haze transmittance (VI) reduction and recovery detection function 12,
A VI deterioration detection function 13 is provided between the input function 10 and the emergency value control means 7. Then, the smoke exhausting means 8 causes a fire to occur in the tunnel 1 and, after extinguishing the fire, the operator confirms the extinguishing, calculates and determines the smoke exhausting direction by manual operation, and operates the ventilation equipment 15 to exhaust the smoke. When smoke is emitted to the tunnel exit side by the fire occurrence zone detection function 11 and smoke emission control start operation, the booster fan 3 installed in the wind direction is operated to emit smoke to the tunnel exit side and to the tunnel entrance side. In this case, the jet fan 2 installed in the opposite wind direction is operated in the normal direction to discharge the smoke toward the tunnel entrance side.
The normal (level) control means 6 operates only the booster fan 3 and operates / stops the ventilation equipment 15 when the measured pollution concentration exceeds or falls below a certain threshold value. The emergency value control means 7 has a function of operating against a sudden deterioration of the measured value of the pollution concentration, and uses all the ventilation equipment 15 installed in the tunnel. However, since the jet fan 2 is installed in the opposite wind direction, the emergency value control means 7
When driving by, it becomes reverse operation.

In the case of another embodiment, the booster fan installed in the forward wind direction is used when the smoke emission direction is calculated / determined by the fire occurrence section detection function 11 and the smoke emission control start operation and the smoke is emitted to the tunnel exit side. When 3 is operated and smoke is discharged to the tunnel exit side, and when it is discharged to the tunnel entrance side, the booster fan 3 installed in the opposite wind direction is operated to discharge smoke to the tunnel entrance side. The normal (level) control means 6 operates only the booster fan 3 and operates / stops the ventilation equipment when the measured value of the pollution concentration exceeds or falls below a certain threshold value. The emergency value control means 7 has a function of operating in response to a sudden deterioration of the measured value of the pollution concentration, and is operated only by the forward booster fan 3 as in the normal level control.

As described above, the smoke exhaust efficiency after a fire in the tunnel can be improved, and smooth and quick smoke exhaust is possible. Further, it is possible to sufficiently deal with the normal ventilation control.

[0010]

According to the present invention, it is possible to construct a tunnel ventilation control device which is effective in an emergency such as a tunnel fire.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a tunnel ventilation control device showing an embodiment of the present invention.

[Explanation of symbols]

 1 Tunnel 2 Jet Fan 3 Booster Fan 4 Ventilation Control Device 5 Contamination Concentration Meter 6 Normal (Level) Control Means 7 Emergency Value Control Means 8 Manual Smoke Evacuation Means 9 Priority Judgment Function 10 Input Function 11 Fire Occurrence Zone Detection Function

Claims (1)

[Claims] 1. A booster fan that can be ventilated in only one direction, and the ventilation direction is the same as the wind direction of the tunnel, and is installed over almost the entire area of the tunnel. The direction of the reverse ventilation matches the direction of the wind in the tunnel, and the output of the jet fan installed near the entrance of the tunnel and the pollution concentration meter installed in the tunnel to measure the air pollution concentration determines the booster fan's output. Normal control means for performing operation control, and emergency value control means for operating the jet fan in the opposite direction in addition to the booster fan by increasing the output of the pollution concentration meter,
A tunnel ventilation control device comprising: a smoke exhausting unit that outputs either a forward operation command to the jet fan or an operation command to the booster fan after the fire is extinguished, according to the fire spot.