JPS642831Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of the starting point of an insulated section of a rigid double-track contact line.

In rigid double-track contact lines (hereinafter simply referred to as contact lines) used in monorails and new transportation systems,
Due to structural constraints of vehicles and running routes, it is not possible to secure a large space for laying the overhead contact lines, so the overhead contact lines are placed on the same side.
The lines are laid with narrow spacing in the vertical direction. Conventionally, the starting point of the insulating section is located at the same position in the direction of movement of the current collection shoe for both the upper and lower lines in the feeder insulation section, which is the boundary point of power supply on the overhead contact line, and the current collection shoe is insulated. There is a drawback that when the section passes, the arc causes an electron current to flow to the overhead contact line, easily causing a short circuit between the phases.

To explain this based on the drawings, Fig. 1 shows the relationship between the contact line and the current collection shoe of the three-phase current collector installed on the vehicle, as seen from the running direction, and Fig. 2 shows the relationship between the contact line and the current collection shoe of the three-phase current collector installed on the vehicle, and Fig. FIG. 2 is an explanatory diagram of an insulating section,
A current collector shoe 2 of a current collector installed on the side of the electric vehicle 1 slides on a contact wire 3 installed on the side of the vehicle travel path. Further, the feeder insulation section 4, which is the boundary point of power supply, is made of an insulating material such as FRP or wood, and maintains electrical insulation from adjacent overhead contact lines. As shown in FIG. 2, this insulating section 4 has starting points a, b, and c at the same position for all three lines, and the current collecting shoe 2 is connected to the insulating section 4 from the direction of movement (direction of the arrow).
An arc is generated when passing through starting points a, b, and c,
There is a risk that an electron flow will flow from the lower overhead contact line to the upper overhead contact line, causing a short circuit between each line of the overhead contact line 3, and causing operational problems such as an emergency stop of the vehicle.

The present invention has been developed in consideration of the above points, and aims to prevent inter-phase short circuits between contact lines. Its characteristic is that the starting points of the insulating sections for dividing the current are successively shifted from the upper contact line to the lower contact line in the same direction as the current collecting shoe advances.

An embodiment of the present invention will be described below with reference to FIG. 3. Starting points a', b', and c' of the insulating section 4 are connected to the upper overhead contact line to the lower overhead contact line in the direction of movement of the current collecting shoe (in the direction of the arrow). It is constructed by shifting at a constant interval.

In the present invention, as described above, the starting points of the insulating sections of the overhead contact line are sequentially shifted from the upper contact line to the lower contact line, so that even if the current collecting shoe passes through the insulating section and an arc occurs, the upper contact line will not be affected. Since it is insulated, short circuits between phases are eliminated, and operational problems such as vehicle emergency stops can be prevented.

[Brief explanation of the drawing]

Figure 1 is a diagram of the relationship between the rigid overhead contact line and the current flow of the three-phase current collector installed in the vehicle, viewed from the running direction, Figure 2 is an explanatory diagram of a conventional insulated section, and Figure 3 is the main FIG. 3 is an explanatory diagram of an insulating section according to an embodiment of the invention. 1 is an electric vehicle, 2 is a current collector shoe, 3 is a rigid double-track contact line, 4 is an insulated section, a, b, c,
a′, b′, c′ are starting points.

Claims (1)

[Scope of utility model registration request] In railways that obtain power from rigid double-track AC overhead contact lines installed on the side of the running track for electric vehicles, and where the overhead contact lines are arranged vertically on the same side of the track, this method is used to separate the feeding power. A structure of an insulated section of an overhead contact line configured such that the starting point of the insulated section is sequentially shifted from the upper overhead contact line to the lower overhead contact line in the direction of movement of the current collecting shoe.