JP2000002098A - Air supply device for tunnel of magnetically levitated type railway - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute an air supply device capable of inhibiting the spread of a fire at a time when the fire is generated in a tunnel for a magnetically levitated type railway. SOLUTION: The tunnel for the magnetically levitated type railway, in which a single or a plurality of guide ways are laid and to which a track device consisting of ground coils covered with insulating members arranged to the internal surfaces of the side sections of the above-mentioned guide ways and feeder cables being laid on the bottom sections of the above-mentioned guide ways and supplying the above-mentioned ground coils with a current is arranged, is partitioned into a plurality of exhaust control sections by installing noncontact type partition means 21 at every fixed length. The air supply devices 25 having nitrogen-gas mixing means are mounted at every section, and nitrogen gas is mixed with the outside air and air supply is conducted so that the oxygen concentration of air in the tunnel reaches 18% or more and reaches oxygen concentration of the lowest oxygen exponent or less of each insulating member constituting the track device by the above-mentioned nitrogen-gas mixing means of the air supply devices 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air supply device for a tunnel of a magnetic levitation railway.

[0002]

2. Description of the Related Art A track device of a magnetically levitated railway is disclosed, for example, in "THE21" January Special Issue (January 1, 1995).
It is configured as shown in FIG. FIG. 2 is a cross-sectional view of a state where a track device is laid in a tunnel of a magnetic levitation railway. FIG. 3 is a configuration diagram showing a state in which an air supply device and an exhaust device of the tunnel of the magnetically levitated railway of FIG. 2 are arranged. In the figure, 1
Is a vehicle, 2 is a superconducting electromagnet mounted on the vehicle 1, 3 is a ground coil having a configuration in which a coil formed in a ring shape is covered with an insulating member such as epoxy resin or unsaturated polyester resin, and 4 is a ground coil. The power supply cable is connected to the power supply cable 3 and the periphery of the conductor is insulated with a crosslinked polyethylene resin. Reference numeral 5 denotes a U-shaped guideway laid on the floor of the tunnel. A ground coil 3 is mounted on the inner side of the side, and a power supply cable 4 is laid on the bottom. 1
Reference numeral 0 denotes a tunnel in which a track device is laid.

[0003] Reference numeral 11 denotes an intake port, 12 denotes an exhaust port, 15 denotes an air supply device for taking in air into the tunnel 10, and 16 denotes an exhaust device for exhausting air in the tunnel 10.
5 and the exhaust device 16 are always operated, and fresh air is always taken in.

[0004] The insulating material used in the track device is a flame-retardant material, and the oxygen index of the oxygen concentration required to continue burning in the case of burning specified in JIS K 7201 is shown in Table 1. It has become.

[0005]

[Table 1]

[0006]

In the tunnel 10 of the magnetic levitation railway constructed as described above, the oxygen index of the insulating material used for the track device is lower than the oxygen concentration in the air of 21%. Value or near value,
Its oxygen index is 22 for the epoxy resin of the ground coil 3, 21 for the unsaturated polyester, and 19 for the cross-linked polyethylene of the power supply cable. In the event of a fire, the power supply cable 4 is particularly likely to spread. there were.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and can suppress the spread of the insulating material constituting the track device when a fire occurs in a tunnel. It is configured.

[0008]

According to a first aspect of the present invention, there is provided an air supply apparatus for a tunnel of a magnetic levitation type railway, wherein a plurality of ventilation control sections are provided by providing a non-contact type partitioning means for each predetermined length of the tunnel. And an air supply means having a nitrogen gas mixing means for taking in outside air for each section, wherein the air supply means has an oxygen concentration of 18% or more in the tunnel by the nitrogen gas mixing means, and a track device. The nitrogen gas is mixed with the outside air so that the oxygen concentration is equal to or lower than the lowest oxygen index of each of the insulating members.

According to a second aspect of the present invention, there is provided an air supply device for a tunnel of a magnetically levitated railway, wherein the non-contact type partitioning means for dividing a ventilation management section for each predetermined length of the tunnel is provided. It is an air curtain.

According to a third aspect of the present invention, there is provided an air supply device for a tunnel of a magnetically levitated railway, in which nitrogen gas is mixed with outside air to supply air so that the oxygen concentration becomes 18 to 19%. is there.

According to a fourth aspect of the present invention, in the air supply device for a tunnel of a magnetically levitated railway, a fire occurs in the tunnel,
When it is detected that no vehicle is present in the tunnel, the outside air is supplied from the air supply device by mixing nitrogen gas so that the oxygen concentration becomes 12% or less.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 shows the configuration of the first embodiment of the present invention. In FIG. 1, reference numeral 21 denotes a non-contact type partitioning means for dividing the tunnel 10 into a ventilation management section of a predetermined length, and is constituted by an air curtain having no solid member in the partitioning portion. Reference numeral 22 denotes nitrogen gas supply means for supplying nitrogen gas to air to be taken in, reference numeral 23 denotes an air intake device for taking in air, and reference numeral 24 denotes a mixing device for mixing the introduced air and nitrogen gas at a predetermined mixing ratio. Reference numeral 26 denotes an exhaust device for exhausting the air in the tunnel 10.

By dividing the inside of the tunnel 10 into a ventilation management section having a predetermined length by the non-contact type partitioning means 21 arranged at a predetermined interval, the tunnel 10 is divided without hindrance to running of the vehicle, and the supply and exhaust management is performed. Can be managed in detail for each ventilation management section.

When a fire occurs in the tunnel, assuming that there is a human body in the ventilation management section of the tunnel 10, the oxygen concentration is 18% according to the regulations for preventing oxygen deficiency from the viewpoint of preventing an oxygen deficiency accident. It is necessary to keep it above.

As described in the section of the prior art, the materials used in the magnetic levitation type orbiting apparatus are as follows. 1 cross-linked polyethylene for cable
On the other hand, it is necessary to maintain the oxygen concentration at 18% or more in order to prevent an oxygen deficiency accident in an underground space, a sealed container, or the like.

From the above, as a condition for preventing an oxygen deficiency accident in a sealed space, the oxygen concentration must be ensured to be 18% or more, and the spread of fire when the fire of the insulating material constituting the ground coil 3 occurs is suppressed. The condition is to make it smaller than the oxygen index of each insulating material. The material used for the orbital device, which has a small oxygen index with respect to a normal oxygen ratio of 21%, is cross-linked polyethylene of the feed cable 4 having an oxygen index of 19.

In such a track device, the lower limit of the oxygen concentration in the tunnel 10 is one of the conditions for preventing an oxygen deficiency accident.
When the upper limit is set to 8% or more and the upper limit is set to 19% or less corresponding to the oxygen index of 19 of the cross-linked polyethylene of the power supply cable, the fire in the tunnel 10 can be prevented from spreading and the condition that can prevent the oxygen deficiency accident can be secured. In the air supply device 25 for each ventilation management section, nitrogen gas is supplied by the nitrogen gas supply means 22 to adjust the oxygen concentration of the supplied air to 18 to 19.
%, There is no fear of an accident due to oxygen deficiency, and a fire can be suppressed when a fire occurs in the tunnel 10.

Embodiment 2 FIG. In the first embodiment, for the occurrence of a fire in the tunnel, the air supply is controlled to the condition for preventing the oxygen deficiency accident and the condition for suppressing the spread of fire. However, when the fire occurs, the spread of the fire is suppressed. It is difficult to extinguish a fire only by the conditions, and in a condition where no vehicle exists in the ventilation management section, it is necessary to set the condition so that the fire can be effectively extinguished against the occurrence of a fire. , So that a ventilation management condition in a condition where no vehicle exists in the ventilation management section can be set.

In the actual tunnel 10, vehicles pass at a high speed. Even if a fire occurs in a certain ventilation management section, the vehicle passes through the section at a high speed. Even if there is a vehicle in the ventilation management section where it occurred, the vehicle is configured to be able to immediately leave without leaving the dangerous place where the fire is occurring for a long time even by self-propelled, It is not necessary to secure conditions for preventing oxygen deficiency accidents for a long time in a fire situation. In view of such a situation, in the second embodiment, a sensor for detecting the presence or absence of a vehicle is installed in the tunnel 10 under the conditions of the first embodiment. In the air supply device 25, the nitrogen gas is supplied by the nitrogen gas supply device 22 so that the oxygen concentration becomes 12% or less under the condition of spontaneous fire extinguishing when the insulating material constituting the track device is burning. It is configured to supply air into the tunnel.

[0020] With this configuration, when a vehicle detection sensor detects that no vehicle is present, the fire that occurs in the ventilation management section where no vehicle is present is immediately switched to an oxygen concentration of 12% or less, and is supplied with air. The fire in the ventilation control section will be suffocated and extinguished in a short time, and the damage will be minimized.

[0021]

According to a first aspect of the present invention, there is provided an air supply device for a tunnel of a magnetically levitated railway, wherein a non-contact type partitioning means is provided for each predetermined length of the tunnel and divided into a plurality of ventilation management sections. An air supply unit having a nitrogen gas mixing unit that takes in outside air for each section is provided, and the air supply unit is provided by a nitrogen gas mixing unit.
The oxygen concentration of the air in the tunnel is 18% or more, and
It is configured so that nitrogen gas is mixed with the outside air to supply oxygen so that the oxygen concentration is less than the lowest oxygen index of each insulating member that composes the orbital device. It will be a tunnel that can suppress the spread of fire when a fire occurs.

According to a second aspect of the present invention, there is provided an air supply device for a tunnel of a magnetically levitated railway, wherein the non-contact type partitioning means for dividing a ventilation control section for each predetermined length of the tunnel is provided. Because it is an air curtain, it can be divided into ventilation management sections that do not hinder the passage of vehicles.

According to the third aspect of the present invention, in the air supply device for a tunnel of a magnetically levitated railway, nitrogen gas is mixed into the outside air to supply oxygen so that the oxygen concentration becomes 18 to 19%. By using a general cross-linked polyethylene cable as the power supply cable, it is possible to manage the ventilation control section in the tunnel that can prevent oxygen deficiency accidents and prevent fire spread in the event of a fire.

According to a fourth aspect of the present invention, in the air supply device for a tunnel of a magnetically levitated railway, a fire occurs in the tunnel,
When it is detected that no vehicle is present in the tunnel, the outside air is supplied from the air supply device by mixing nitrogen gas so that the oxygen concentration becomes 12% or less.
If there is no vehicle in the ventilation management section where a fire has occurred, the condition can be switched to the condition where suffocation can be extinguished immediately.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an arrangement state of a non-contact type partition unit, an air supply device, and an exhaust device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a state where a track device is laid in a tunnel of a magnetically levitated railway.

FIG. 3 is a configuration diagram showing a state where an air supply device and an exhaust device of a tunnel of a conventional magnetic levitation railway are arranged.

[Explanation of symbols]

21 non-contact type partition means, 22 nitrogen gas supply means, 2
3 Air intake device, 24 mixing device, 25 air supply device, 26 exhaust device.

Claims (4)

[Claims] 1. A single or plurality of guideways for guiding the running of a vehicle, a ground coil covered with an insulating member attached to an inner surface of a side of the guideway, and laid on a bottom of the guideway to supply a current to the ground coil. In a magnetic levitation railway track device consisting of a supply cable to be supplied, in a tunnel air supply device laid on the floor, a non-contact type partitioning means is provided for each predetermined length of the tunnel and divided into a plurality of ventilation management sections. And an air supply means having a nitrogen gas mixing means for each section, wherein the air supply means has an oxygen concentration of 18% or more in the tunnel air by the nitrogen gas mixing means. An air supply device for a tunnel of a magnetically levitated railway, wherein a nitrogen gas is mixed and supplied to the outside air so that the oxygen concentration is equal to or lower than the lowest oxygen index of the member. 2. The air supply device for a magnetic levitation railway tunnel according to claim 1, wherein the non-contact type partition means for dividing the ventilation control section for each predetermined length of the tunnel is an air curtain. 3. The air supply device for a tunnel of a magnetic levitation railway according to claim 1, wherein nitrogen gas is mixed into the outside air to supply the oxygen concentration to 18 to 19%. 4. When a fire occurs in a tunnel and it is detected that no vehicle is present in the tunnel, a nitrogen gas is mixed from an air supply device so that the oxygen concentration becomes 12% or less. The air supply device for a tunnel of a magnetically levitated railway according to claim 1, wherein the air supply device supplies air.