JPS631221B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a superconducting magnetic levitation railway platform structure in which vehicles levitate using superconducting electromagnets.

As is well known, superconducting magnetic levitation railways use extremely powerful superconducting electromagnets, and their magnetic flux generates an induced current in a coil placed on the track side of the ground, which causes the vehicle to levitate. Some methods have been proposed, such as linear synchronous motors in which a current with a frequency corresponding to the vehicle speed is passed through a guide coil used to guide the vehicle to create a moving magnetic field, which is generated by the polarity of a superconducting electromagnet on the vehicle. This is done by attraction and repulsion. At low speeds, the electromagnetic repulsion is small due to the small induced current generated in the coil on the ground, making it impossible to fly in the air, so the vehicle travels on the track with its running tires out. For example, if we consider a station premises, etc., unless the train is passing through at high speed, it will have to travel at a low speed on rubber tires due to conditions such as branching or to stop at a platform to allow passengers to get on and off. Even when the vehicle is stopped, a superconducting magnetic levitation vehicle emits the same strong magnetic flux as when it is running at high speed. For this reason, unlike radioactivity, magnetic flux is not thought to have a strong physiological effect on the human body; however, magnetic flux is not considered to have a strong physiological effect on the human body. In particular, people waiting for a train on the platform usually leave their baggage on the floor of the platform, so they may be adversely affected by the superconducting electromagnet of the intruding vehicle. There is a problem with it.

The present invention was developed in view of the above circumstances, and its purpose is to block the magnetic flux from the superconducting electromagnet of a superconducting magnetic levitation vehicle to passengers waiting on a station platform, thereby preventing any negative impact on baggage, etc. The purpose is to provide a platform structure that can be used without any problems.

An embodiment of the present invention will be described below with reference to the drawings. First, the general structure of a superconducting magnetically levitated vehicle and its track/platform will be explained with reference to FIG. Superconducting electromagnets 5 and 6 are attached to the left and right sides of the bogie 4, and guide and propulsion coils 8 and 9 are installed on both sides of a U-shaped track 7 made of concrete or the like on the ground side, and guide and propulsion coils 8 and 9 are installed on the bottom surface. levitation coil 1
0, 11 and maintain a constant relative position, float, guide,
It is configured to be able to move forward. Also this vehicle 1
When traveling at low speed, the traveling tires 12,
12 and guide tires 13, 13 are put out to run within the U-shaped track 7. These tires are retracted and are in a non-contact state when driving at high speeds. 14 is a platform located next to track 7 inside the station;
A fence 16 with a door is provided on the upper surface of the floor 15 to prevent passengers from coming to the edge of the platform when the vehicle 1 passes or until it stops. It is made to open. Although the fence 16 may have a closed building structure, in this figure, for convenience of explanation, it will be explained as a simple fence. In addition, the platform 14 is the floor 1
5 and the girder 1 of the adjacent track 7
It has a structure having a connecting beam 20 with the pillars 19 of 8, and a space, that is, a horizontal recess 21 is formed on the lower surface of the floor 15 on the side of the track 7. A magnetic shielding device 22 made of a magnetic plate such as an iron plate having an appropriate thickness is provided in the recessed part 21 of the platform 14 in the longitudinal direction of the platform. As shown in the figure, this magnetic shielding device 22 has a substantially U-shaped cross section so as to follow the inside of the recessed part 21, and a vertical plate part 22A is attached along the column 17, and an upper plate part 22B is attached along the lower surface of the floor 15 at its tip. The lower plate portion 22C extends from the support 17 to the lower surface of the girder 18 of the track 7 and is attached so that the upper and lower plate portions 22B and 22C face each other vertically and are suitable for vehicles 1 that are traveling. It is designed to maintain a distance of a predetermined distance or more from the superconducting electromagnet 6. A magnetic shielding device 23 made of a magnetic plate such as an iron plate is also installed on the floor of the vehicle body 2 to prevent the magnetic flux from the superconducting electromagnets 5 and 6 from reaching a certain value inside the vehicle. The edge 22BB of the upper plate portion 22B of the magnetic shielding device 22 of the platform 14 is connected to the magnetic shielding device 23 of the vehicle body floor so that the magnetic flux flows from the magnetic shielding device 22 of the platform 14 to the shielding device 23 of the vehicle body floor when the magnetic shield device 22 of the platform 14 comes. It is arranged at a position close to the side end of the device 23 at approximately the same height.

The magnetic shielding effect according to the present invention having the above configuration will be explained with reference to FIG. 2. FIG. 2 shows the superconducting magnetic levitation vehicle 1 parked on the platform 14 on which the magnetic shielding device 22 is installed. This conceptually shows the magnetic flux distribution from the electromagnets 5 and 6. The lower part of the magnetic flux emitted from the superconducting electromagnet 5 on the right shows an extremely straightforward magnetic flux distribution as there is no magnetic material nearby, as shown in 24. However, due to the presence of the magnetic shielding device 23, the magnetic flux 25 above creates a loop through the magnetic plate, and hardly reaches the inside of the vehicle above it. Although some magnetic flux still circulates to the upper part of the magnetic shielding device 23, the magnetic flux is sufficiently low to have no adverse effect on the human body or various devices. Here, if we look at the flow of the upper and lower magnetic fluxes 26 and 27 of the superconducting electromagnet 6 closer to the platform side, we can see that the lower magnetic flux 26
flows from the lower plate portion 22C of the magnetic shielding device 22 through the vertical plate portion 22A to form a curved loop, whereas the upper magnetic flux 27 flows from the vertical plate portion 22A of the magnetic shielding device 22 to the upper plate portion. 22
B, and also the vehicle floor magnetic shielding device 23
flows through the magnetic plate, and both magnetic fluxes flow through the upper plate part 2.
A curved magnetic flux circuit is formed from the edge 22BB of 2B to the magnetic shielding device 23. For this reason, first of all, the upper magnetic flux 27 does not wrap around to the car side above the floor surface of the car body like the magnetic flux 25 on the right side, and even if a small amount of magnetic flux wraps around, the amount is extremely small. Even if only a small amount of equipment is placed on the floor 15 of the platform 14, it will not be adversely affected by harmful effects, and it is naturally possible to prevent people on the platform 14 from being exposed to strong magnetic fields. Although the magnetic shielding device 22 surrounds the superconducting electromagnet 6 in a U-shape, and a slight attraction force acts on each other, the upper and lower plate portions 22B and 22C are almost similar and symmetrical. Since they are opposed to each other, the vertical attraction forces are almost balanced, and the horizontal attraction forces do not become too large, causing almost no problem for the superconducting magnetic levitation vehicle 1 during levitation. There isn't.

In addition, when the magnetic shielding device 23 is not attached to the floor surface of the vehicle body 2 of the superconducting magnetic levitation vehicle 1, that is, the vehicle has a structure in which the distance to the vehicle body floor surface is sufficiently far for the magnetic flux of the superconducting electromagnets 5 and 6. In this case, it is possible to omit the magnetic shielding device 23 in order to reduce the weight of the vehicle.Even in such a case, there is no difference in function due to the reduced weight on the platform side, so the magnetic shielding device 22 can be omitted. If installed as described above, almost the same magnetic shielding effect as above can be obtained, making it possible to protect people on the platform 14 from strong magnetic fields, and at the same time protect people working below the platform 14. In addition to being good in terms of safety for the human body, it also prevents magnetic materials that are easily placed on the platform from being attracted and moved and attracted to the superconducting electromagnet 6. It will also be possible to prevent such inconveniences.

Since the present invention is made as detailed above, the magnetic flux from the superconducting electromagnet of the superconducting magnetic levitation vehicle can be blocked at the bottom surface of the platform, thereby completely protecting people on the platform and devices susceptible to magnetic fields. This makes it an extremely advantageous structure for a station platform in a superconducting magnetic levitation railway.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional configuration diagram showing a superconducting magnetic levitation vehicle according to the present invention and the relationship between its trajectory and platform. FIG. 2 is an explanation showing the distribution of magnetic flux generated from the superconducting electromagnet of the superconducting magnetic levitation vehicle shown in FIG. It is a diagram. 1...Superconducting magnetic levitation vehicle, 2...Vehicle body, 3...
...air spring, 4...bogie, 5, 6... superconducting electromagnet, 7... track, 8, 9... guide/propulsion coil,
10, 11... Levitation coil, 12... Running tire, 13... Guide tire, 14... Platform, 15... Platform floor, 16... Passenger protection, 17, 19... Support, 18... Track girder, 20
...beam, 21...lateral recess, 22, 23...magnetic shielding device, 22A...vertical plate, 22B...
...Upper side plate part, 22BB...Edge, 22C...Lower side plate part, 24, 25, 26, 27...Magnetic flux.

Claims (1)

[Scope of Claims] 1. A superconducting electromagnet is used to prevent the magnetic flux generated by the superconducting electromagnet from reaching the lower surface of the platform adjacent to the track of the superconducting magnetically levitated vehicle that travels on the platform. To,
A superconducting magnetic levitation railway platform structure characterized by being constructed by disposing a magnetic shielding device such as a magnetic plate. 2. A superconducting magnetic levitation railway platform according to claim 1, characterized in that the magnetic shielding device is disposed in a horizontal recess on the track side of the lower surface of the platform so as to be vertically opposed to each other so as to have a substantially U-shaped cross section. structure. 3. Claim 1 or 2, characterized in that the magnetic shielding device is arranged so that its edge is as close as possible to a magnetic shielding plate arranged on the floor of the vehicle body of the magnetically levitated vehicle. superconducting magnetic levitation railway platform structure.