KR102275608B1 - Impedance Bond For Railroad Having Anti-Moisture Structure Improved insulating Property without Relay Malfunction And Method Thereof - Google Patents

Abstract

The present invention relates to a malfunction-free railway impedance bond having an anti-moisture film to increase insulating property, which can efficiently control railway vehicles, and a manufacturing method thereof. According to the present invention, a railway impedance bond comprises: a first coil winding body wound around a first bobbin with a certain number of turns and connecting a second bus bar connection terminal to one end of a first coil while a first bus bar connection terminal is connected to the other end of the first coil to come in contact with the first bobbin; a second coil winding body wound around a second bobbin, as an axis, with the same number of turns as that of the first coil winding body and connecting a fourth bus bar connection terminal to one end of a second coil while a third bus bar connection terminal is connected to the other end of the second coil to come in contact with the second bobbin; a primary coil winding body allowing the first bus bar connection terminal to penetrate second coil layers to match the third bus bar connection terminal while placing the first coil winding body on the lower side and placing the second coil winding body on the upper part, so that resistance of the first coil winding body and second coil winding body are the same with respect to a neutral point; a secondary coil winding body having a coil wound around a third bobbin in an electrical proportional relationship with the number of coil turns of the primary coil winding body while coming in contact with the lower surface of the primary coil winding body and having a plurality of lead wires connected and coupled to both ends of the coil; a silicon iron core formed through the center of the primary coil winding body and the secondary coil winding body; a moisture prevention film formed around the primary coil winding body, the secondary coil winding body, and the silicon iron core except for a plurality of bus bar connection terminals and lead wires; and an accommodation enclosure having the primary coil winding body, the secondary coil winding body, and the silicon iron core, which are sealed with the moisture prevention film, embedded and coupled thereto without vibration.

Description

Impedance Bond For Railroad Having Anti-Moisture Structure Improved insulating Property without Relay Malfunction And Method Thereof

The present invention relates to an impedance bond for a railway track circuit, and more particularly, the coil is wound so that the resistance value of the primary coil winding body, based on the neutral point, is balanced to fall within a range close to each other, and the primary coil winding It relates to an impedance bond with excellent insulation and no malfunction by sealing the hull, secondary coil winding body and silicon iron core with a moisture barrier film.

In a system for controlling train operation conditions. Real-time data during speed, stop, departure, and operation are very important factors, and the operation of a system that controls train operation by combining these factors has recently become a very important social infrastructure technology due to the improvement of the quantity and speed of trains.

In performing train speed control, stop control, progress, stop indication control, etc.

For efficient control, it is necessary to divide the railway between stations into required lengths.

The divided part is usually called a track circuit, and the impedance bond is located at the boundary between the track circuits and is used to distinguish the signal current from the catenary return current. It is a device that generates a signal to perform a desired control function related to the train.

Impedance bond is used to secure the DC circuit of the return current near the insulation coefficient in the transition section to the low resistance and relatively high reactance iron core coil. Impedance bond is a kind of transformer used in a system that can manage and supervise a desired control and control function related to trains, which is installed at the boundary between track circuits and used to distinguish between signal current and catenary return current.

The impedance bond of the railway track circuit device has a difference in length depending on the winding method of the winding coil used, and the resistance value of both sides may occur differently based on the neutral point, so a solution to eliminate the unbalance of the resistance value is required is becoming

In the installed impedance bond housing, there are cases where the insulation between the coils changes under the influence of moisture and dirt, causing a malfunction signal.

Therefore, in the impedance bond of the current railroad track circuit, the resistance of the winding coil used should be balanced based on the neutral point, so that a signal malfunction should not occur and there should be no signal delay. It is emerging as an important factor in preventing train collision accidents.

Korean Patents 10-0455931, 10-0453858, 10-1555361, 10-1719326

An object of the present invention for solving the above problems is to wind the coil so that the resistance value of the primary coil winding body is uniform and balanced on both sides based on the neutral point, the primary coil winding body, the secondary coil By sealing the winding body and the silicon iron core with a moisture barrier, it provides an impedance bond with excellent insulation and a manufacturing method to effectively control railway vehicles.

The impedance bond of the present invention as a means for achieving the above object,

In a state in which the first busbar connection terminal is connected to one end of the first coil in contact with the first bobbin, the first bobbin is wound around the first bobbin with a certain number of turns, and the second busbar connection terminal is connected to the other end of the first coil. In a state where the third busbar connection terminal is connected to one end of the second coil in contact with the first coil winding body and the second bobbin, the second coil winding body has the same number of turns as the number of turns of the first coil winding body with the second bobbin as the axis. A second coil winding body in which a coil is wound and a fourth bus bar connection terminal is connected to the other end of the second coil, the first coil winding body is placed on the lower part, and the second coil winding body is placed on the upper part of the first bus a primary coil winding body in which the bar connection terminal penetrates between the second coil layers and coincides with the third bus bar connection terminal, the resistance of the first coil winding body and the second coil winding body being the same with respect to the neutral point;

A secondary coil winding in which a plurality of lead wires are connected and coupled to both ends of the coil while the coil is wound on the third bobbin in an electrical proportional relationship with the number of coil turns of the primary coil winding body in contact with the lower surface of the primary coil winding body hull;

a silicon iron core formed through the center of the primary coil winding body and the secondary coil winding body;

a moisture barrier film formed around the primary coil winding body, the secondary coil winding body, and the silicon iron core except for a plurality of bus bar connection terminals and lead wires;

The primary coil winding body, the secondary coil winding body, and the silicon iron core sealed with the moisture barrier are internally coupled without vibration, and the bus bar connection terminals coupled with a plurality of primary coil winding bodies can be pulled out on one side. It has three holes located on the other side and includes a housing box having one hole through which the lead-in connected to the secondary coil winding body can be pulled out on the other side.

The first and second bobbins have a structure through which they are penetrated and are formed of a non-conductive insulating material, and the first and second bobbins have different thicknesses.

The first and second coils are formed of a plate-shaped conductor material, and the outer surface thereof is coated or covered with an insulating material.

The second coil winding direction includes a direction opposite to the first coil winding direction.

The first and second busbar connection terminals may have a length longer than that of the third and fourth busbar connection terminals by the width of the winding coil.

The lengths of the first and second coils may be different from each other.

The moisture barrier film includes a silicone film or an epoxy film having a thickness of 2 to 4 cm.

An anti-vibration rubber film is formed on the inner bottom of the housing, the lid of the housing is double formed, a terminal block is installed on the first lid to connect the lead-in line, and a second lid is installed on the first lid to prevent rainwater or dirt Including that a plurality of coupling devices are formed so that they cannot be introduced.

The method of forming the impedance bond of the present invention as a means for achieving the above object,

A first coil having a first busbar connection terminal connected to one end of the first coil and a second busbar connection terminal connected to the other end is wound around the first bobbin to form a first coil winding body having a predetermined number of turns. is formed, and a second coil having a third busbar connection terminal connected to one end of the second coil and a fourth busbar connection terminal connected to the other end is wound around the second bobbin to have the same number of turns as the first coil winding body After winding to form a second coil winding body, the first coil winding body is disposed on the lower side, and the first bus bar connection terminal and the third bus bar connection terminal are coupled while the second coil winding body is disposed on the upper part. a first coil winding body manufacturing step of making the resistance of the first coil winding body and the second coil winding body equal with respect to the neutral point;

After winding the coil on the third bobbin in an electrical proportional relationship with the number of coil windings of the primary coil winding body, and connecting a plurality of lead wires to both ends of the coil, attach the secondary coil winding body to the lower surface of the primary coil winding body Secondary coil winding body manufacturing step;

a silicon iron core connecting step of forming a silicon iron core through the center of the primary coil winding body and the secondary coil winding body;

a moisture barrier film forming step of forming a moisture barrier film by adding a molding liquid to the primary coil winding body, the secondary coil winding body, and the silicon iron core after making a molding plate surrounding the area except for a plurality of bus bar connection terminals and lead wires;

It has three grooves on one side for pulling out the bus bar connection terminal coupled with the primary coil winding body, and one groove on the other side for pulling out the lead-in wire connected with the secondary coil winding body By making a housing, the primary coil winding body, secondary coil winding body, and silicon iron core sealed with the moisture barrier are combined in the housing without vibration, and the bus bar connection terminal is pulled out of the housing, and the lead-in is accommodated in the housing. and having the containment enclosure plying step withdrawn to the outside.

The method of connecting the first, second, third, and fourth busbar connection terminals to the first and second coils includes performing electrical welding.

The method of coupling the first and third busbar connection terminals to each other includes the step of inserting the first busbar connection terminal between the second winding coils of the second coil winding body to match and connect the first busbar connection terminals to each other.

According to the present invention as described above, the coil is wound so that the resistance value of the primary coil winding body is uniform and balanced on both sides based on the neutral point, and the primary coil winding body, the secondary coil winding body and the silicon iron core are wound. Impedance bond of railway track circuit without malfunction due to excellent insulation by sealing with moisture barrier can be obtained.

In addition, it is possible to obtain a method for manufacturing an impedance bond of a track circuit for railways, which has excellent insulation and does not cause malfunction.

1 is a photograph of an impedance bond installation of a railway track circuit of the present invention.
2 is a photograph showing a connecting wire that emits a signal current and a catenary return current to a railroad track.
3 is an impedance bond photograph of a railway track circuit in which a defect has occurred.
4 is a photograph in which the primary coil winding body, the secondary coil winding body, and the silicon iron core of the present invention are combined.
5 is an exploded photograph of the silicon iron core used in the present invention.
6 is a photograph showing the formation of a moisture barrier after bonding the primary coil winding body, the secondary coil winding body, and the silicon iron core of the present invention.
7 is a photograph showing one side of the housing of the present invention.
8 is a photograph of a state in which the first lid of the housing of the present invention is covered.
9 is a photograph showing the state of embedding a component having a moisture barrier film formed after combining the primary coil winding body, the secondary coil winding body, and the silicon iron core in the housing of the present invention.
10 is a cross-sectional view showing the completed impedance bond state by embedding the components in the housing of the present invention and coupling the lid of the housing.
11 is a picture of the completed impedance bond of the present invention.
12 is a process diagram showing an impedance bond manufacturing step of the present invention.

With respect to the embodiments of the present invention disclosed in the text, specific structural or functional descriptions are only exemplified for the purpose of describing the embodiments of the present invention, and the embodiments of the present invention may be embodied in various forms. It should not be construed as being limited to the embodiments described in .

Since the present invention can have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing each figure, similar reference numerals are used for components.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle. Other expressions describing the relationship between elements, such as "between" and "immediately between" or "neighboring to" and "directly adjacent to", should be interpreted similarly.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate that the specified feature, number, step, action, component, part, or combination thereof exists, but one or more It should be understood that this does not preclude the possibility of addition or existence of other features or numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The same reference numerals are used for the same components in the drawings, and repeated descriptions of the same components are omitted.

1 is a photograph of an impedance bond installation of a railway track circuit of the present invention.

2 is a photograph showing a connecting wire on a railroad track.

A return current (power current) and a signal current flow in the railroad rails on which the electrically driven train runs. The return current is the current that drives the train and returns to the substation after the train has passed. The signal current is the current that detects the entry of the train. Both currents flow through the rail. Therefore, by installing an insulating joint at both ends of the rail to limit the range in which the signal current flows through the rail, the signal current must be blocked and the return current can pass through the insulating joint, and the impedance bond 100 plays such a role.

3 is an impedance bond photograph of a railway track circuit in which a defect has occurred.

Referring to FIG. 3 , the impedance bond of the railway track circuit is a kind of transformer and is composed of a primary coil winding body 110 and a secondary coil winding body 130 , which are the most core elements of the transformer. The secondary coil winding body 130 on the right side of the photo is connected to a plurality of lead wires 140a, b, and c. The secondary coil winding body 130 is standardized and generalized as a set.

All parts on the right side of the photo except for the secondary coil winding body 130 are parts that become the primary coil winding body of the transformer.

In the characteristic of the impedance bond of the railway track circuit, the primary coil winding body should be divided into two at the neutral point, the neutral point terminal should be connected to the ground, and the terminals at both ends should be connected to both rails. Therefore, the second and fourth busbar connection terminals 120a 170a, 120c 170c are later connected to both rails, and the first and third busbar connection terminals 120b 170b, which are neutral terminals, must be coupled to each other and connected to the ground line. do.

In this case, since the difference in resistance between both terminals should be minimized with the neutral point as the center, various coil winding methods and resistances of the connecting terminals connected to the coil should be considered in order to produce products that pass the strict examination through resistance unbalance tests. .

In addition, due to the nature of being built in the housing 180 and being installed outdoors for a long time, it is not only resistant to rain, snow, and temperature, but also to moisture generated by dew condensation inside the housing due to internal heat generated by operating as a transformer and a temperature difference. This causes a malfunction of the insulation between the coils, resulting in a malfunction signal.

When the heat insulating material 190 is put inside the housing 180 to reduce the external temperature difference, the heat insulating material works as a transformer as well as rain, snow, and temperature. If it contains moisture, a malfunction signal occurs frequently.

As a result of many experiments to solve this problem, the malfunction occurred the least when the housing was filled with only air without using an insulating material, and the primary and secondary coil windings and silicon iron core were sealed with a moisture barrier.

4 is a photograph in which the primary coil winding body, the secondary coil winding body, and the silicon iron core of the present invention are combined.

5 is an exploded photograph of the silicon iron core used in the present invention.

4 and 5, the winding winding method of the impedance bond for railway used in the present invention and the winding body are the matters in Korean Patent Registration No. 10-1719326 registered by the inventor of the present invention, in detail For the content, only the characteristic parts are described in order to refer to the published materials and to state the characteristics of the invention.

In a state in which the first busbar connection terminal 120b is connected to one end of the first coil in contact with the first bobbin (not shown), the first bobbin is wound around the first bobbin with a certain number of turns, and the second end is connected to the other end of the first coil. The first coil winding body 110a to which the bus bar connection terminal 120a is connected is manufactured.

In a state in which the third busbar connection terminal 120b is connected to one end of the second coil in contact with the second bobbin (not shown), the second bobbin is the axis of the second bobbin with the same number of turns as the number of turns of the first coil winding body. A second coil winding body 110b in which a coil is wound and a fourth busbar connection terminal 120c is connected to the other end of the second coil is manufactured.

The first coil winding body 110a is placed on the lower side and the second coil winding body 110b is placed on the upper side, and the first busbar connection terminal 120b is penetrated between the second coil layers to obtain a third busbar connection terminal. Consistent with (120b), the first coil winding body 110a and the second coil winding body 110b with respect to the neutral point are made of primary coil winding bodies 110a and 110b having the same resistance.

In contact with the lower surface of the primary coil winding body (110a, 110b), the coil is wound on a third bobbin (not shown) in an electrical proportional relationship with the number of coil windings of the primary coil winding body, and a plurality of lead wires at both ends of the coil The secondary coil winding body 130 to which (140a, 140b, 140c) are connected is standardized and generalized as a set.

The silicon iron core 150 uses two U-shaped iron cores to penetrate through the center of the first, second, and third bobbins used when the primary coil winding body 110a, 110b and the secondary coil winding body 130 are manufactured. Tapping is coupled.

6 is a photograph showing the formation of a moisture barrier film after bonding the primary coil winding body, the secondary coil winding body, and the silicon iron core of the present invention.

6, after coupling the primary coil winding body 110a, 110b, the secondary coil winding body 130, and the silicon iron core 150, a plurality of busbar connection terminals 120a, 120b, 120c and A moisture barrier film 160 is formed by sealing a portion except for a portion of the lead lines 140a, 140b, and 140c with a silicone film or an epoxy film to a thickness of 2 to 4 cm.

The method of forming the moisture barrier film 160 includes a plurality of busbar connection terminals 120a, 120b, and 120c in the primary coil winding body 110a, 110b, the secondary coil winding body 130, and the silicon iron core 150. And after making a molding plate surrounding the area except for the lead-in lines (140a, 140b, 140c), a silicone liquid or an epoxy liquid is put in and sealed to a thickness of 2 to 4 cm to make the moisture barrier film 160.

7 is a photograph showing one side of the housing of the present invention.

8 is a photograph of a state in which the first lid of the housing of the present invention is covered.

9 is a photograph showing a state in which a component having a moisture barrier film formed therein after combining the primary coil winding body, the secondary coil winding body, and the silicon iron core in the housing of the present invention.

10 is a cross-sectional view showing the completed impedance bond state by embedding the components in the housing of the present invention and coupling the lid of the housing.

11 is a picture of the completed impedance bond of the present invention.

7, 8, 9, 10, and 11, the housing 180 in the impedance bond should be made of a strong structure that rainwater or other contaminants cannot penetrate into the interior, and vibrations from trains and other external sources. There shall be no disconnection of the device assembly part inside the impedance bond or a faulty connection.

The housing 180 made of PVC or industrial plastic material is a connection terminal capable of pulling out the bus bar connection terminals 120a, 120b, and 120c coupled to the primary coil winding body 110a, 110b on one side to the outside. (170a, 170b, 170c) has three holes (185a, 185b, 185c) that can be pulled out in combination with the lead wire (140a, 140b, 140c) coupled to the secondary coil winding body 130 on the other side ) has one hole 189 through which it can be pulled out.

An anti-vibration rubber film is formed on the inner bottom of the housing 180, and the primary coil winding bodies 110a and 110b, the secondary coil winding body 130, and the silicon iron core 150 are combined and a plurality of busbars are connected. Terminals (120a, 120b, 120c) and parts except for some of the lead wires (140a, 140b, 140c) are sealed with a silicone or epoxy film to a thickness of 2 to 4 cm to fix the body having the moisture barrier film 160 and prevent vibration.

The lid is formed as a double, and the terminal block 188 is installed on the first lid, and the lead-in wires 140a, 140b, 140c are inserted through the hole 187 of the first lid and connected to the terminal block 188, and the housing body (180) It is taken out through the hole 189 of the other side.

The bus bar connection terminals 120a, 120b, and 120c coupled to the primary coil winding body 110a, 110b are combined with the connection terminals 170a, 170b, 170c that can be pulled out to the three holes 185a, 185b. , 185c) to the outside.

The second lid is installed on the first lid and is assembled by tightening it thoroughly so that rainwater or dirt cannot flow in.

After pulling out the connecting terminals 170a, 170b, 170c and the lead wires 140a, 140b, 140c that can be pulled out to the outside, the four holes 185a, 185b, 185c, 189 are thoroughly sealed.

Then, there is no inflow of rainwater or dirt, and the primary coil winding body, secondary coil winding body and silicon iron core are sealed with a moisture barrier, and the moisture generated by the dew condensation caused by the temperature difference due to the internal heat generated while operating as a transformer Impedance bond of railway track circuit without malfunction due to excellent insulation can be obtained.

12 is a process diagram showing an impedance bond manufacturing step of the present invention.

A first coil having a first busbar connection terminal connected to one end of the first coil and a second busbar connection terminal connected to the other end is wound around the first bobbin to form a first coil winding body having a predetermined number of turns. and winding a second coil having a third busbar connection terminal connected to one end of the second coil and a fourth busbar connection terminal connected to the other end of the second coil as an axis, the same as the number of turns of the first core winding body After winding to form a second coil winding body, the first bus bar connection terminal and the third bus bar connection terminal are coupled while the first coil winding body is disposed on the lower part and the second coil winding body is disposed on the upper part Thus, a primary coil winding body having the same resistance as the first coil winding body and the second coil winding body is manufactured based on the neutral point.

After winding the coil on the third bobbin in an electrical proportional relationship with the number of coil windings of the primary coil winding body, and connecting a plurality of lead wires to both ends of the coil, attach the secondary coil winding body to the lower surface of the primary coil winding body do.

The silicon iron core is connected through the center of the primary coil winding body and the secondary coil winding body.

Among the primary coil winding body, the secondary coil winding body, and the silicon iron core, a molding plate is formed to cover a portion except for a plurality of bus bar connection terminals and lead wires, and then a molding liquid is added to form a moisture barrier.

It has three grooves on one side for pulling out the bus bar connection terminal coupled with the primary coil winding body, and one groove on the other side for pulling out the lead-in wire connected with the secondary coil winding body By making a housing, the primary coil winding body, secondary coil winding body, and silicon iron core sealed with the moisture barrier are combined in the housing without vibration, and the bus bar connection terminal is pulled out of the housing, and the incoming wire is accommodated in the housing. In the step of overlapping the receiving enclosures pulled out, the impedance bond of the track circuit for railway is made.

As described above, although described with reference to preferred embodiments of the present invention, those of ordinary skill in the art may vary the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below. It will be understood that modifications and changes may be made to

According to the present invention, the impedance bond of the railway track circuit can be manufactured more easily, and the standardized parts can be calculated in advance and mass-produced, so that the cost reduction and work efficiency are good, and other products can be manufactured by variously applying the idea of the present invention. can make

100: impedance bond 110a, 110b: primary coil winding body
120a, 120b, 120c: bus bar connection terminals
130: secondary coil winding body 140a, 140b, 140c: incoming line
150: silicon iron core 160: moisture barrier film
170: connecting terminal 180: receiving box

Claims (10)

In a state in which the first busbar connection terminal is connected to one end of the first coil in contact with the first bobbin, the first bobbin is wound around the first bobbin with a certain number of turns, and the second busbar connection terminal is connected to the other end of the first coil. In a state where the third busbar connection terminal is connected to one end of the second coil in contact with the first coil winding body and the second bobbin, the second coil winding body has the same number of turns as the number of turns of the first coil winding body with the second bobbin as the axis. A second coil winding body in which a coil is wound and a fourth bus bar connection terminal is connected to the other end of the second coil, the first coil winding body is placed on the lower part, and the second coil winding body is placed on the upper part, while the first booth a primary coil winding body in which the bar connection terminal penetrates between the second coil layers and coincides with the third bus bar connection terminal so that the resistance of the first coil winding body and the second coil winding body is the same with respect to the neutral point;
A secondary coil winding in which a plurality of lead wires are connected and coupled to both ends of the coil while the coil is wound on the third bobbin in an electrical proportional relationship with the number of coil turns of the primary coil winding body in contact with the lower surface of the primary coil winding body hull;
a silicon iron core formed through the center of the primary coil winding body and the secondary coil winding body;
a moisture barrier film formed around the primary coil winding body, the secondary coil winding body, and the silicon iron core except for a plurality of bus bar connection terminals and lead wires;
The primary coil winding body, the secondary coil winding body, and the silicon iron core sealed with the moisture barrier are internally coupled without vibration, and the bus bar connection terminals coupled with a plurality of primary coil winding bodies on one side can be pulled out. Impedance bond for railway track circuit, characterized by having three holes on the other side and a housing box having one hole on the other side to take out the lead-in connected to the secondary coil winding body. [2] The impedance bond of claim 1, wherein the second coil winding direction is opposite to the first coil winding direction. The impedance bond of claim 1, wherein the moisture barrier is a silicon film or an epoxy film and has a thickness of 2 to 4 cm. According to claim 1, wherein the housing has an anti-vibration rubber film is formed on the inner bottom, the housing lid is formed in a double, a terminal block is installed on the first lid to connect the lead-in line, and the second lid is attached to the first Impedance bond for railway track circuit, characterized in that it is installed on the lid and a plurality of coupling devices are formed so that rainwater or dirt cannot flow in. The impedance bond of claim 1, wherein the first and second coils are formed of a plate-shaped conductor material and the outer surface is coated or covered with an insulating material. A first coil having a first busbar connection terminal connected to one end of the first coil and a second busbar connection terminal connected to the other end is wound around the first bobbin to form a first coil winding body having a predetermined number of turns. is formed, and a second coil having a third busbar connection terminal connected to one end of the second coil and a fourth busbar connection terminal connected to the other end is wound around the second bobbin to have the same number of turns as the first coil winding body After winding to form a second coil winding body, the first coil winding body is disposed on the lower side, and the first bus bar connection terminal and the third bus bar connection terminal are coupled while the second coil winding body is disposed on the upper part. a first coil winding body manufacturing step of making the resistance of the first coil winding body and the second coil winding body equal with respect to the neutral point;
After winding the coil on the third bobbin in an electrical proportional relationship with the number of coil windings of the primary coil winding body, and connecting a plurality of lead wires to both ends of the coil, attach the secondary coil winding body to the lower surface of the primary coil winding body Secondary coil winding body manufacturing step;
a silicon iron core connecting step of forming a silicon iron core through the center of the primary coil winding body and the secondary coil winding body;
A moisture barrier film forming step of forming a moisture barrier film by putting a molding liquid after making a molding plate surrounding a portion of the primary coil winding body, the secondary coil winding body, and the silicon iron core except for a plurality of bus bar connection terminals and lead wires;
It has three grooves on one side for pulling out the bus bar connection terminal coupled with the primary coil winding body, and one groove on the other side for pulling out the lead-in wire connected with the secondary coil winding body By making a housing, the primary coil winding body, secondary coil winding body, and silicon iron core sealed with the moisture barrier are combined in the housing without vibration, and the bus bar connection terminal is pulled out of the housing, and the incoming wire is accommodated in the housing. A method of manufacturing an impedance bond for a railroad track circuit, characterized by having a receiving enclosure overlapping step taken out to the outside. [Claim 7] The method of claim 6, wherein the first, second, third, and fourth busbar connection terminals are connected to the first and second coils by electrical welding. 7. The method of claim 6, wherein the method for coupling the first and third busbar connection terminals to each other is to connect the first busbar connection terminal by inserting the first busbar connection terminal between the second winding coils of the second coil winding body. How to make orbital circuit impedance bond [Claim 7] The method of claim 6, wherein the method of forming the moisture barrier film comprises forming a molded plate surrounding a portion of the primary coil winding body, the secondary coil winding body, and the silicon iron core excluding a plurality of busbar connection terminals and lead-in wires, and then using a silicone liquid. , or a method of manufacturing an impedance bond for railway track circuits, characterized by adding an epoxy liquid. [Claim 7] The method of claim 6, wherein the silicon iron core is coupled through the center of the primary coil winding body and the secondary coil winding body using two U-shaped iron cores and then coupled by tapping.

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