JPH06286612A - Impedance bond - Google Patents

Abstract

PURPOSE:To make impedance bond oilless and simplify the terminal structure. CONSTITUTION:Lead-out wines 7, 8 of a primary coil 2 and a secondary coil 3 which are wound around an iron core 1 are sealed by synthetic resin 12 of a seal mechanism 10 and pulled out to the outside of a case 4. Impedance conductor is directly connected to the lead-out wire 7 of the primary coil, and a wiring cable of track relay transformer is directly connected to the lead-out wire 8 of the secondary soil.

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 FIG. 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 by the neutral point terminal 22, and is generated by the return current flowing in each winding. The magnetic fluxes are arranged so that they cancel each other out. Primary coil 2
A copper plate is usually used for the conductor of, 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 Co., Ltd. Hiroshi Yoshimura et al. 1 person, Signal Showa 4
See April 15, 1).

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]

However, in order to connect the copper plate of the primary coil 2 to the terminals 21 and 22, each of the terminals, which are nut-fixed to the case, is water-tightly sealed, and a rotation stopper is further applied to the nut. When the copper wire of the secondary coil 3 is connected to the secondary terminal 23, the copper wire is watertightly sealed in the case 4 and the copper wire is nut-tightened for each terminal that is nut-fastened. In addition, the external lead-out wiring and the terminals must be soldered, which requires very troublesome assembly and maintenance. By the way, in the normal type, 8 nut tightening points and 12 soldering points are required. In the case of using a tertiary coil, the nut tightening points are 12 points.

On the other hand, when the case is filled with the insulating oil for cooling and insulating the impedance bond, the insulating property is deteriorated with time. In addition to the problem of having to carry out regularly, there was a disaster prevention problem due to the low flash point.

An object of the present invention is to use the lead wire of the coil as a terminal as it is, to mount the terminal, to fix the nut for electrical connection between the terminal and the coil, and to completely eliminate the soldering point, and to provide an oilless impedance. To provide a bond.

[0008]

In order to achieve the above object, the impedance bond according to the present invention is an impedance bond having a primary coil, a secondary coil, and a sealing mechanism, and the primary coil is a train current. The coils for the primary coil are arranged in a pair so that the magnetic fluxes generated by the return currents flowing through the windings cancel each other and are wound around the iron core.The conductor of the primary coil is made by stacking multiple strip-shaped conductor plates. , A laminated body in which a heat-resistant fiber tape is wound around the outer peripheral surface of the superposed conductor plates, the terminals of the primary coil are lead wires of the coil, and the fiber tape at the end portion of the laminated body is excluded. Is fixed integrally and is pulled out to the outside through a sealing mechanism, the secondary coil is a signal current coil, the conductor of the secondary coil is a copper wire cable, and the primary coil Wound around the iron core between, the terminal of the secondary coil is the lead wire of the coil, and the end of the copper wire cable is pulled out through the seal mechanism, and the seal mechanism draws at least the lead wire portion of each coil. Resin molding is performed to isolate each coil from the outside air.

Further, the impedance bond has a case, the case accommodates the primary coil and the secondary coil, is watertightly sealed, and the sealing mechanism is attached to a part of the case.

The seal mechanism is a resin molding of each coil including the lead wire and each winding wound around an iron core.

[0011]

With the laminated body, which is the lead wire of the primary coil drawn out of the case, as a terminal, the impedance bond lead wire is directly screwed to connect the impedance bond to the rail. Also, connect the wiring cable of the track relay transformer directly to the lead wire of the secondary coil. The leader of each coil is
Since it is resin-molded by the sealing mechanism, moisture does not enter the case from around the lead wire. The sealing mechanism is basically a resin molding of the gap between the lead wires of the coil that is drawn out through a part of the case. If the resin is molded together with each coil, the case becomes unnecessary.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3, the basic structure as an impedance bond is the same as the conventional one. That is, a pair of primary coils 2 is wound around the 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 coil for electric train current, and the conductor of the coil is formed by laminating a plurality of strip-shaped conductor plates with a certain thickness, and a heat-resistant fiber tape on the outer peripheral surface of the laminated conductor plates. The structure of this laminated body is a conventionally known one.

The secondary coil 3 is a signal current coil, and its conductor uses a copper wire cable. On the other hand, the case 4 has an opening 5 at a part of its rim, and a receiving groove 6 is provided immediately below the opening 5. The opening 5 is a hole through which the lead wire of the coil passes, and the lead wires 7 and 8 of the primary coil 2 and the secondary coil 3 are drawn to the outside of the case 4 through the opening 5. The lead wire 7 of the primary coil is formed by removing the fiber tape from the laminated body, adhering and integrating the conductor plates of the respective layers, and providing a bolt hole 9 through the plate surface of the conductor plate, and on one side of the case 4. It is a horizontal projection. Further, the lead wire 8 of the secondary coil 3 is pulled out to the outside through the opening 5 as it is.

The seal mechanism 10 seals the lead wires 7 and 8 of each coil drawn from the case 4 and the gap between the case 4. In the embodiment, a pair of partitions 11 having the lead wires 7 and 8 inserted therein is mounted on the receiving groove 6, a synthetic resin 12 is placed between the partitions 11, and silicone rubber 13 is poured on the upper surface of the partition 11 to receive the partitions. Each of the lead wires 7 and 8 is embedded in the synthetic resin 12 on the groove 6 and sealed in a watertight manner.

The pair of primary coils 2 are connected by neutral point terminals 15 and 15, respectively. In the present invention, the neutral point terminals 15 and 15 are connected to the lead wire 7 of the primary coil.
Similarly to the above, the fiber tape is removed from the laminate, the conductor plates of the respective layers are laminated and integrated, and the conductor plates are provided so as to project to the other side of the case 4. Similarly to the lead wires 7 and 8 of the primary coil and the secondary coil, the neutral point terminal 15 is also embedded in a synthetic resin of a sealing mechanism (not shown) and sealed in a watertight and airtight manner.

The case 4 is covered with a cover plate 14, and the joint is sealed with an O-ring 16 or silicone rubber. The lead wire 7 of the primary coil uses this as a terminal, and directly connects one end of an impedance bond conducting wire (not shown) using a bolt nut and connects the other end to a rail (not shown). The lead wire 8 of the secondary coil is soldered to a wiring cable (not shown) of the track relay transformer.

As described above, in the embodiment, the seal mechanism 10
As an example, the synthetic resin 12 is laid on the receiving groove 6 of the case 4 and the lead wires 7 and 8 of each coil are embedded. However, the receiving groove 6 does not necessarily have to be attached to the case 4, and in short, The gap between the lead wires 7 and 8 and the case 4 is made of synthetic resin 1
Embedding with 2 is enough.

Furthermore, as shown in FIGS. 4 and 5, the synthetic resin 12 of the seal mechanism 10 including the iron core 1 around which the coils 2 and 3 are wound is not limited to a part of the coil lead wires 7 and 8. If it is molded with a resin and molded into a certain shape, the case becomes unnecessary.

[0020]

As described above, according to the present invention, the lead wire of each coil is resin-sealed and drawn out of the case, the impedance bond lead wire is connected to the lead wire of the primary coil, and the lead wire of the secondary coil is connected. Since it is directly connected to the signal transformer wiring, it realizes oilless and eliminates the need for the sealing mechanism at the electrical connection point, the terminal structure of the case, the nut tightening between the terminal and the coil, and soldering. Assembling and maintenance management can be simplified, quality and reliability are improved, and conventional terminal-related parts such as bushes, collars, packings, brass castings, etc. are not required, so the number of parts can be greatly reduced. Have.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional plan view showing an embodiment of the present invention.

FIG. 2 is a sectional side view of the same portion.

FIG. 3 is a front view of the same.

FIG. 4 is a sectional side view showing another embodiment of the present invention.

FIG. 5 is a plan view of the same.

FIG. 6 is a partial cross-sectional plan view of a conventional impedance bond.

FIG. 7 is a sectional side view of the same.

FIG. 8 is a configuration diagram of an impedance bond.

[Explanation of symbols]

 1 iron core 2 primary coil 3 secondary coil 4 case 5 opening 6 receiving groove 7 primary coil lead wire 8 secondary coil lead wire 9 bolt hole 10 sealing mechanism 11 partition 12 synthetic resin 13 silicon rubber 14 lid plate 15 neutral Point terminal 16 O-ring

Claims (3)

[Claims] 1. An impedance bond having a primary coil, a secondary coil, and a sealing mechanism, wherein the primary coil is a train current coil, and a magnetic flux generated by a return current flowing through each winding is paired. Are arranged so as to cancel each other and wound around an iron core, and the conductor of the primary coil is formed by stacking a plurality of strip-shaped conductor plates and winding a heat-resistant fiber tape on the outer peripheral surface of the stacked conductor plates. It is a laminated body attached, the terminal of the primary coil is a lead wire of the coil, is fixed integrally except for the fiber tape of the terminal portion of the laminated body, is drawn out through the sealing mechanism to the outside, the secondary coil is It is a coil for signal current, the conductor of the secondary coil is a copper wire cable, it is wound around the iron core between the pair of the primary coil, the terminal of the secondary coil is the lead wire of the coil, through the sealing mechanism. Drawn terminals of the line cable to the outside, sealing mechanism, at least, the impedance bond, characterized in that the portion of the lead wire of each coil is resin-molded, is to isolate the coil from the outside air. 2. The impedance bond according to claim 1, further comprising a case, the case accommodating the primary coil and the secondary coil is watertightly sealed, and the sealing mechanism is attached to a part of the case. Impedance bond that is characterized by being 3. The impedance bond according to claim 1, wherein the sealing mechanism is configured to resin-mold each coil including each winding wound around an iron core together with a lead wire.