JPH072108A - Impedance bond - Google Patents

Abstract

PURPOSE:To dispense with the connection work of the neutral terminal in the installation site to provide a compact impedance bond. CONSTITUTION:A pair of a first transformer part 5 and a second transformer part 6 are incorporated in a case 4, the primary coil 2 of each transformer part is connected to the primary coil terminals 11 provided on the external wall of the case 4 while the secondary coil 3 is led from the coil leading outlet as the secondary coil terminals 10. The neutral terminals 13, 13 of the respective transformer parts 5, 6 are directly connected in the case 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impedance bond installed at a boundary point of a double-track type track circuit of a railway line.

[0002]

2. Description of the Related Art In the electric driving section, the return current of the train,
The signal current is an electric circuit that shares the same rail. Therefore, the signal current must flow only in one track circuit and not in the other track circuit, and the return current must flow to the substation. Impedance bond does not pass signal current to the adjacent track circuit,
This is used for the electrical connection method of passing the return current of the train.

The basic structure of the impedance bond is shown in FIG.
As shown in (1), the primary coil 2 and the secondary coil 3 are wound around the iron core 1, and the primary coil 2 is divided into two and is connected to another impedance bond at the neutral point terminal 22 and flows to each winding. The magnetic fluxes generated by the return currents are arranged so as to cancel each other out. A copper plate is usually used for the conductor of the primary coil 2, and the number of turns is about 5 to 10 turns. The secondary coil 3 is a flat copper wire and is inserted between the primary coils 2 with the same number of turns as the primary coil. In some cases, a tertiary coil may be provided to connect a capacitor (Koyusha Yoshimura Co., Ltd.).
Hiro et al., 1 person signal, see April 15, 1966).

Conventionally, the primary coil 2, the secondary coil 3 and the iron core 1 are housed in a case 4 as shown in FIGS.
For cooling and insulation, the case 4 is filled with insulating oil and sealed, and the primary terminal 21 and the neutral point terminal 22 provided on the outer wall of the case 4 are connected to the copper plate of the primary coil 2 and the secondary terminal 23.
The copper wire of the secondary coil 3 was connected to, and the connection was made by nut fixing and soldering.

[0005]

By the way, since the impedance bond is provided for each track circuit, it is common to install two impedance bonds at the boundary between adjacent track circuits. Therefore, when installing each impedance bond, at the installation site, set the installation position and spacing of the pair of impedance bond cases, stack the terminal plates 23 of both neutral point terminals 22, and tighten the bolts and nuts. Must be fixed.

Further, in order to provide the neutral terminal 22 on the outer wall of the case 4, it is structurally necessary to screw the terminal to the conductor of the primary coil and to solder the lead wire connecting the terminal and the terminal plate. Therefore, it requires a very troublesome labor for its assembling, maintenance and management.

An object of the present invention is to provide an impedance bond that does not require the work of connecting the neutral point terminal at the installation site and has a simplified structure of the neutral point terminal.

[0008]

In order to achieve the above object, the impedance bond according to the present invention is an impedance bond in which a pair of transformer parts are housed in the same case, and the transformer part comprises a primary coil and a secondary coil. The coil has a coil and a neutral point terminal, and the primary coil is a coil for electric train current and is paired and wound around an iron core so that the magnetic fluxes generated by the return currents flowing in the respective windings cancel each other. , The terminal of the primary coil is for connecting the lead wire of the coil to the external wiring, the secondary coil is a coil for signal current, and is wound around an iron core between a pair of primary coils, The terminal of the secondary coil connects the lead wire of the coil to the external wiring, and the neutral point terminal is the conductor of the paired primary coil and the neutral part of the paired transformer. The point terminal is the case In are those that are directly connected.

Further, the conductor of the primary coil is a laminated body in which a plurality of conductor plates are superposed and a tape having heat resistance is wound around the outer peripheral surface of the superposed conductor plates. It is an end portion of a laminated body which is integrally fixed except the tape, and the neutral point terminals of both transformers are formed by superposing the laminated bodies on top of each other and integrally connected.

[0010]

[Function] The case is installed at the boundary between adjacent track circuits, the terminals of the primary coils of the transformers of the impedance bond are connected to the impedance conductors of the corresponding track circuits, and the terminals of the secondary coils are connected to the corresponding track relay transformers. Connect to the wiring cable of. Since the neutral point terminal is already connected in the case, connection work on site is unnecessary. Also, since both neutral point terminals are housed in the case,
The structure is simplified by only directly connecting the conductors of the primary coil.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In the present invention, a pair of impedance bond transformer parts are housed in the same case. In the present invention, the transformer portion means a portion excluding the case from the conventional impedance bond structure. Therefore, the basic structure of the impedance bond transformer is the same as the conventional one. 1 to 3, a pair of primary coils 2 is wound around an iron core 1, and a secondary coil 3 is wound between the pair of primary coils 2. In addition, a tertiary coil (not shown) may be provided to connect a capacitor.
The iron core 1 around which the coils 2 and 3 are wound is housed in a case 4, and the case 4 is sealed.

The primary coil 2 is a train current coil, and the conductor of the coil is formed by stacking a plurality of strip-shaped conductor plates with a certain thickness, and heat-resistant glass fibers on the outer peripheral surface of the stacked conductor plates. It is a laminated body in which a tape is wound, and the structure of this laminated body is conventionally known.

The secondary coil 3 is a coil for signal current, and a copper wire cable is used for its conductor. Case 4
Is a combination of a rectangular parallelepiped box 7 having a size capable of juxtaposing a pair of transformer sections (hereinafter, referred to as a first transformer section 5 and a second transformer section 6) and a lid 8 closing an upper opening of the box 7. In this case, the box 7 is integrally provided with pedestals 9 that project from both sides of the bottom and are fixed on the track bed of the track. In addition, the secondary coil terminal 1 is provided on the opposite end surfaces (first surface A, second surface B) on the short side.
The coil outlet as 0 and the terminals 11 of the primary coil are attached to both sides of the coil outlet with the coil outlet interposed therebetween.

The coil outlet is a sleeve through which the lead wire of the secondary coil (the lead wire of the secondary coil and the tertiary coil when the tertiary coil is used) is inserted, and the terminal 11 of the primary coil is connected to the impedance lead wire. Connector.

1 and 2, lead wires 2a and 3a of the primary coil 2 and the secondary coil 3 of the first transformer section 5 are connected to the primary coil terminal 11 and the secondary coil terminal 10 of the first surface A, respectively. The lead wires 2 a and 3 a of the primary coil 2 and the secondary coil 3 of the second transformer section 6 are connected to the primary coil terminal 11 and the secondary coil terminal 10 of the second surface B. Alternatively,
The lead wire 2a of the primary coil 2 may be drawn out of the box 7 as it is, the gap may be sealed, and the drawn end may be used as a coil terminal.

The lead wire 2a of the primary coil 2 is formed by removing the glass fiber tape from the laminated body and laminating and integrating the conductor plates of the respective layers to form a small hole on the surface, and the opening is used as a screw of the primary coil terminal 11. After inserting and tightening with the nut 12, the lead wire 3a of the secondary coil 3 is pulled out to the outside through the coil outlet as it is to seal the gap.

The pair of primary coils 2 of the transformer parts 5 and 6 are connected to each other through a neutral point terminal 13. In the present invention, the neutral point terminal 13 is similar to the lead wire 2a of the primary coil 2. The glass fiber tape is removed from the laminated body of the coils, the conductor plates of the respective layers are laminated and integrated, and the neutral point terminal 13 of the first transformer section 5 and the neutral point terminal 13 of the second transformer section 6 are vertically stacked. They are also connected in the box.

The upper opening of the box 7 is covered with a lid 8, the joint is sealed with an O-ring 14 or silicone rubber, and the box 7 is fixed by bolts and nuts (not shown). The heat radiation fins are provided not only on the upper surface of the case 4 but also on the lower surface to enhance heat radiation.

The cable (not shown) connected to the primary coil terminal 11 has an impedance bond conductor (not shown).
One end is connected and the other end is connected to the rail. The lead wire 3a of the secondary coil 3 is connected to the wiring cable of the track relay transformer.

[0020]

As described above, according to the present invention, the pair of transformers are housed in the same case, and the neutral point terminals of both transformers are directly connected in the case. Connection work between neutral point terminals is unnecessary, and installation and wiring work at the site can be simplified.

In addition, since the case has a watertight structure, the conductor plates of the primary coils forming the neutral point terminals of both transformers can be directly stacked one on top of the other, so that the structure of the neutral point terminals is simple. Can be converted.

According to the present invention, compared with the conventional example in which two impedance bonds are installed, a large area is not required for the installation place, and the size and the size can be reduced, and the reliability can be improved.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a side view of the same section.

FIG. 3 is a front view of the same.

FIG. 4 is a partial cross-sectional plan view of a conventional impedance bond.

FIG. 5 is a side view of the same section.

FIG. 6 is a configuration diagram of an impedance bond.

[Explanation of symbols]

 1 Iron core 2 Primary coil 3 Secondary coil 4 Case 5 1st transformer part 6 2nd transformer part 7 Box 8 Lid 9 Pedestal 10 Secondary coil terminal (coil outlet) 11 Primary coil terminal 12 Nut 13 Neutral point terminal 14 O-ring

Claims (2)

[Claims] 1. An impedance bond in which a pair of transformer parts are housed in the same case, wherein the transformer part has a primary coil, a secondary coil, and a neutral point terminal, and the primary coil is a train current coil. They are arranged in pairs and are arranged so that the magnetic fluxes generated by the return currents flowing in the respective windings cancel each other out, and are wound around an iron core and have terminals. The secondary coil is a signal current coil and is wound around an iron core between a pair of primary coils and has terminals.The terminals of the secondary coil are the lead wires of the coil and the external wiring. The neutral point terminal is a conductor of the primary coil forming a pair, and the neutral point terminal of the transformer section forming a pair is directly connected in the case. bond. 2. The conductor of the primary coil is a laminate in which a plurality of conductor plates are superposed and a tape having heat resistance is wound around the outer peripheral surface of the superposed conductor plates, and the neutral terminal is 2. A terminal portion of a laminated body which is integrally fixed except for the tape, wherein the neutral point terminals of both transformers are formed by superposing the laminated bodies on top of each other and integrally connected. Impedance bond described in.