JPS62237000A - Ventilation controller for tunnel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a ventilation control device for a tunnel in which an automobile runs.

[Conventional technology]

FIG. 3 is a sectional view of a tunnel for explaining a conventional tunnel ventilation control device disclosed in, for example, Japanese Patent Application Laid-Open No. 59-44499. Figure 4 shows the distribution of contamination inside the tunnel. In Fig. 4, 1 is an exhaust shaft, 2 is a roadway section of the tunnel, 3.4 is an air pollution level sensor, 5 is a jet fan, and 6 is an exhaust fan, and the jet fan 5 is a tunnel that is parted by the exhaust shaft 1. The jet fan 5 and the exhaust fan 6 are controlled by the air pollution level sensors 3 and 4 on both sides of the exhaust shaft 1.
The degree of air pollution in the roadway section 2 of the tunnel was measured, and the measurement was performed based on the difference between the indicated values x and y.

[Problem that the invention seeks to solve]

Since the conventional tunnel ventilation control device is configured as described above, the ventilation air flows through the A of the tunnel as shown in Figure 3.
, B both tunnel entrances) When the air is blowing toward the exhaust shaft 1, the pollution degree distribution in the roadway section 2 of the tunnel is as shown in Figure 4, as shown in Figure 4. Air pollution level sensor 3.4 reading x, y
It is possible to perform tunnel ventilation control based on the difference in

However, due to the influence of the difference in air pressure between the A and B entrances of the tunnel, the direction of travel, the number of vehicles, and the types of vehicles running on the roadway section 2 of the tunnel, the roadway section 2 of the tunnel
As shown in Figure 3, it is very difficult to maintain ventilation air from the tunnel entrances A and B toward the exhaust shaft 1, resulting in the phenomenon of blow-through, which can cause the tunnel to blow through. The wind from the roadway section 2 sometimes blows from the A-side well to the B-side well, or from the B-side well to the A-side well. In this case, the distribution of the degree of contamination of the roadway section 2 of the tunnel will be as shown in Figure 5 or Figure 6, and the place with the highest degree of contamination will be near the entrance on the B side or the A side, so it will no longer be possible to It is impossible to control the ventilation of the tunnel based on the difference between the indicated values X and y of the air pollution level sensors 3 and 4, and furthermore, in order to keep the pollution level of the entire roadway section 2 of the tunnel below the permissible value. , it becomes necessary to increase the ventilation air volume and reduce the slope of the pollution distribution.
For this purpose, there were problems such as requiring large-capacity equipment, and the power cost for operation was high, making it economically disadvantageous.

This invention was developed to solve the above-mentioned problems, and the ventilation air is always blown at an appropriate speed from both entrances of the tunnel toward the exhaust, thereby reducing the pollution level of the roadway section of the tunnel. The purpose is to obtain a tunnel ventilation control device that can stably and economically keep the temperature below the permissible value.

[Means for solving problems]

The tunnel ventilation control device according to the present invention includes various sensors arranged at predetermined positions inside and outside of all the tunnels, exhaust fans in the exhaust shaft, and jet fans arranged on both sides of the exhaust shape of the roadway section of all the tunnels. Based on the information detected by the various sensors, the processing device controls the wind speed so that the ventilation air always blows at an appropriate speed from both tunnel entrances toward the exhaust, and ensures that the forced ventilation air volume fully satisfies the pollution tolerance value. The operation of the jet fan and the exhaust fan is controlled in combination with air volume control to reduce the air volume as much as possible within the range.

[For production]

The tunnel ventilation control device according to the present invention performs tunnel ventilation control stably and economically by combining wind speed control and air volume control. The drawings will be explained. 1st
The figure is a schematic configuration diagram showing one embodiment of the tunnel ventilation control device according to the present invention, in which 1 is an exhaust type, 2
is the roadway part of the tunnel. 3 is an air pollution level sensor that detects the level of air pollution in the roadway section 2 of the tunnel;
Specifically, a smoke permeability meter (hereinafter referred to as a v1 meter), a -carbon oxide detection device (hereinafter referred to as a CO meter), etc. 1+ are placed on both sides of the exhaust 1 of the roadway portion 2 of the tunnel.

5 is a jet fan, 6 is an exhaust fan, the jet fans 5 are arranged on both sides of the exhaust shape 1 of the roadway portion 2 of the tunnel, and the exhaust fan 6 is arranged inside the exhaust shape 1. 7 is an anemometer, 8 is a traffic meter, 9 is a microbarometer, anemometer 7
A traffic meter 8 and a microbarometer 9 are placed on both sides of the exhaust pipe 1 of the roadway section 2 of the tunnel, and a traffic meter 8 and a microbarometer 9 are placed near the entrance on both sides of the roadway section 20 of the tunnel, and the traffic meter 8 is located further outside the tunnel. It is also located in

A processing device that performs the 10Fi wind speed control and air volume control is, for example, an industrial computer or controller. This processing device 10 incorporates control software such as a basic logic section 11, an air volume correction section 12, and an air speed control section 13. 14 is a sophisticated fan control circuit that actually operates the exhaust fan 6'le according to the control output of the fan outputted from the processing device 10; 15 is the control output of the jet fan outputted from the processing device 10; This is a jet fan control circuit for actually operating the jet fan 5 according to the following.

Next, its operation will be explained with reference to the block diagram of FIG. 2. First, the basic logic section 11 has the following functions. That is, it is inputted from the traffic meter 8. Large car.

Based on time-series data on the number of small cars and other vehicle rafts and vehicle speed, long-term traffic prediction task 21 predicts the traffic volume in the tunnel within 30 minutes to 120 minutes, and predicts whether the vehicles with that traffic volume will enter the tunnel. Calculate the amount of pollution generated in the tunnel when the vehicle is driven in the tunnel using the calculation task 22. Calculate the amount of ventilation required to maintain the degree of pollution in the tunnel within the permissible value using the calculation task 23. do.

If the exhaust fan 6 and jet fan 5 are operated to ventilate more than the calculated required ventilation amount, the control target can be achieved, but if the fan is run too full, the power cost will be increased. becomes.

Therefore, the air volume sharing calculation task 24 selects the most economical pattern among the fan operation turns that satisfy the required ventilation volume. As a result, the following is obtained as an output from the basic logic section 11.

That is, when operating the friend fan pattern selected now, the underground wind speed on both sides of the exhaust shaft 1 of the roadway section 2 of the tunnel (hereinafter referred to as reference underground wind speed 35), the operating air volume of the exhaust fan 16 (the fan pattern) value) (hereinafter referred to as standard ventilation air volume 36), the number of operating jet fans 5 (value of fan pattern) (hereinafter referred to as standard number of jet fans 37), and various quantities output from this basic logic unit 11 are the standards for ventilation control. This basic logic 11 is 30 minutes to 1
It is assumed that it is activated approximately once every 20 minutes.

Next, the air volume correction section 12 has the following functions. In other words, the number of cars running in the tunnel changes from moment to moment, and is not constant for 30 to 120 minutes. However, since the basic logic section 11 is activated only once every 30 to 120 minutes, it is necessary to provide some form of correction for it. Furthermore, since the nine reference quantities calculated by the basic logic unit 11 are not necessarily correct values, it is necessary to also correct them.

First, the short-term traffic prediction task 25 predicts the short-term traffic volume for about 10 minutes based on the time-series data of the traffic meter 8. This predicted value of short-term traffic volume is compared with the predicted long-term traffic volume value obtained previously, and a correction amount is calculated by traffic volume feedforward 26.

In addition, the air pollution level sensor 3 measures the pollution level of the air inside the tunnel.
Since the measured value is compared with the control target value, the correction amount of the ventilation air volume is calculated by the pollution degree feedback 27.

(Generally, it is VI feedback and CO feedback.) In the air volume correction section 12, this traffic volume feedforward 2
6. Pollution degree feedback 2T The correction amount outputted from 2T and the reference ventilation air volume are added together and the result is controlled and output as the final exhaust fan air volume. It is assumed that this air volume correction unit 12 is activated at intervals of about 10 minutes.

The basis for this is that there are problems with the strength of large-diameter fans such as exhaust fans if the air volume is changed too much, and that the degree of pollution inside the tunnel is determined by the fact that the air inside the tunnel flows in the length direction of the tunnel. Therefore, it does not change much in the time of 1 minute.

Finally, the wind speed control section 13 has the following functions.

In other words, inside a tunnel, there is a traffic ventilation force due to the movement of cars, a natural wind ventilation force due to the pressure difference between the two tunnel entrances, an increased pressure due to the operation of forced ventilation equipment, a frictional force of the wall acting on the wind blowing inside the tunnel, and a natural wind ventilation force due to the pressure difference between the two entrances of the tunnel. Forces such as entrance and exit losses that act at the mine entrance affect the movement of air in the tunnel, but the balance balance of these pressures is calculated, and the underground wind speed is determined by the basic logic section 11, making sure to maintain it at the standard underground wind speed. The number of jet fans 5 to be operated is calculated in the pressure balance calculation task 28. Furthermore, as a correction means to maintain the tunnel wind speed at the standard tunnel wind speed,
By comparing the measured value of the wind blowing with the reference underground wind speed, the wind speed feedback 29 calculates the corrected number of jet fans 5 in operation.

After that, the number of operating jet fans 5 is calculated by taking into account the value calculated by the basic logic unit 11 and the standard number of jet fans 37 and the pressure balance calculation task 28, and the correction term calculated by the wind speed foot count 29. decide.

This calculation by the wind speed control unit 13 needs to be performed at shorter time intervals than those by the air volume correction unit 12 and the basic logic unit 11.

This is because, if we consider a situation in which the car runs from the B side to the A@ in Figure 1, the distance between the entrance side tunnel and the exhaust plate 1 is L, (m) the distance between the B side tunnel and the exhaust plate 1 is L2 ( m) Vehicle (D) Traveling speed v (rrV'5ec) In the section 41 between the entry side mine and the exhaust plate 1, L1/v seconds In the section 42 between the B side mine and the exhaust plate 1, L2/v seconds On the other hand, under stable ventilation conditions, the wind inside the tunnel flows from the entrance to the exhaust plate 1 in section 41, and from the B-side tunnel to the exhaust shaft 1 in section 42. However, due to the influence of cars running from the B side to the H side, the ventilation force is always B.
Works toward the side tunnel entrance υA. Therefore, when a car is running in section 42, the traffic ventilation force acts in a direction that blocks the ventilation wind, but when a car is running in section 41, it acts in a direction that supports the ventilation wind. becomes.

Therefore, it can be seen that it is necessary to perform the calculation of the wind speed control unit 13 at a time interval shorter than the smaller of L1/v (seconds) and L2/v (seconds). -As an example, Ll YuL2 = 60 cars in a 3000m tunnel.
When traveling at approximately Km/H, it is necessary to perform calculations by the wind speed control unit 13 at time intervals of 1 minute to 3 degrees.

The control software for the above basic logic section 11, air volume correction section 12, wind speed control section 13, etc.
By operating in control cycles, economical and stable ventilation control of centralized exhaust can be realized.

In the above embodiment, in FIG. 2, it has been explained that the correction output is output from the traffic feedforward 26 and the pollution degree feedback 27, but either one of them may be used.

In addition, in a smaller ventilation control device, the basic logic section 1
1 and the wind speed control section 13, the device can function satisfactorily.

〔Effect of the invention〕

As described above, according to the present invention, the processing device is configured to control the jet fan and the exhaust fan using both wind speed control and air volume control based on the detection information of various sensors, so that the It is possible to obtain a stable ventilation air from the tunnel entrance to the exhaust plate, which has the effect of providing an economical and stable ventilation control system for nine tunnels.

[Brief explanation of drawings]

FIG. 1 shows a tunnel according to an embodiment of the present invention. A schematic block diagram showing the ventilation control device, Fig. 2 is a ninth block diagram explaining its operation, Fig. 3 is a sectional view of a narrow tunnel explaining a conventional tunnel ventilation control device, and Fig. 4 ~Figure 6 is a diagram of contamination inside the tunnel. 1 is an exhaust plate, 2 is a roadway section of the tunnel, 3 is an air pollution level sensor, 5 is a jet fan, 6 is an exhaust fan, 7 is an anemometer, 8 is a traffic needle, 9 is a microbarometer, 10 is a processing device , 11
12 is a basic logic section, 12 is an air volume correction section, 13 is a wind speed control section, 14 is a 77-inch control circuit, and 15 is a jet fan control circuit. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Patent applicant: Mitsubishi Electric Co., Ltd. Figure 1: Grasping cherry blossoms. Figure 3 3.4 Pollution level sensor Figure 5 Figure 6

Claims (1)

[Claims] An exhaust fan installed in the exhaust shaft of a tunnel in which the exhaust shaft is connected to the middle part in the length direction, a jet fan installed on both sides of the exhaust shaft in the roadway portion of the tunnel, and air pressure at both entrances of the tunnel. Various sensors are placed at predetermined positions inside and outside the tunnel to measure the difference in wind speed, air pollution level, traffic volume, etc. in the tunnel, and based on the detection information of these various sensors, ventilation air is constantly The jet fan and the exhaust fan are combined by controlling the wind speed so that the wind blows at an appropriate speed from the wellhead toward the exhaust shaft, and controlling the air volume so that the forced ventilation air volume is as small as possible within the range that satisfies the pollution tolerance value. A tunnel ventilation control device comprising a processing device for controlling the operation of a tunnel.