Flexible low temperature resistant protective type rail lead-in wire of a current limiting transformer

Abstract

This utility model discloses a flexible, low-temperature resistant, protective choke transformer rail lead wire, including a cable body with circular copper tube terminals and square copper plate terminals at both ends. The cable body comprises multiple steel strands and multiple copper strands; the steel strands are made of multiple strands of fine steel wire, and the copper strands are made of multiple strands of fine copper wire; both the steel and copper strands are covered with a wrapping tape, and an insulating outer sheath is provided outside the wrapping tape; multiple steel strands are located at the center of the cable body, and multiple copper strands are arranged circumferentially around the outer edge; the ratio of copper strands to steel strands is determined according to electrical performance requirements. The solid, rigid conductor is replaced with multiple strands of soft wire, meeting standards while achieving good bending performance and conductor corrosion resistance; the softer texture makes the lead wire easier to bend and increases its flexibility, reducing installation difficulty, minimizing breakage due to vibration, and improving service life. This structural design ensures both the strength and flexibility of the lead wire.

Description

Technical Field

[0001] This utility model belongs to the field of railway track lead wire technology, specifically a flexible, low-temperature resistant, protective choke transformer rail lead wire. Background Technology

[0002] The rail lead wire of the choke transformer is mainly used to connect the rail at the power supply and receiving end of the track circuit to the choke transformer box or cable box. The rail lead wire consists of connection terminals at both ends, copper strands that provide conductivity, and steel strands that improve its tensile strength.

[0003] In the existing technology, the rail lead wire is composed of multiple strands of steel wire and multiple strands of copper wire. The steel wire is solid and relatively hard, making the lead wire difficult to bend and lacking in flexibility. This not only makes installation difficult, but also causes long-term vibrations of a certain amplitude when rail vehicles pass by, which can easily cause the square copper plate terminals in the lead wire to break, affecting its service life. Utility Model Content

[0004] This invention aims to overcome the shortcomings of existing technologies by providing a flexible, low-temperature resistant, protective choke transformer rail lead wire. This invention replaces a solid, rigid conductor with multiple strands of soft wire, meeting standards while achieving good bending performance and conductor corrosion resistance. The softer material makes the lead wire easier to bend, increases its flexibility, reduces installation difficulty, minimizes breakage due to vibration, and extends its service life.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a flexible low-temperature resistant protective choke transformer rail lead wire, including a cable body, with a circular copper tube terminal and a square copper plate terminal at both ends of the cable body, the cable body including multiple steel strands and multiple copper strands; the steel strands are made of multiple thin steel wires twisted together.

[0006] Preferably, the steel strands and copper strands are provided with a wrapping strap, and the wrapping strap is provided with an insulating outer protective layer.

[0007] Preferably, the copper strand is made of multiple thin copper wires twisted together.

[0008] Preferably, the plurality of steel strands are located at the center of the cable body, and the plurality of copper strands are arranged circumferentially around the outer edge.

[0009] Preferably, the circular copper tube terminal includes a first wire plate, which is inclined upward at 25° to 35°; the square copper plate terminal includes a second wire plate, which is inclined downward at 25° to 35°.

[0010] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0011] (1) The solid hard conductor is replaced by multiple soft wires twisted together, which meets the standard and achieves good bending performance and conductor corrosion resistance. The softer texture makes the lead wire easy to bend and improves its flexibility, reducing the difficulty of installation, reducing the breakage of the lead wire caused by vibration, and improving the service life.

[0012] (2) The cross-sectional area ratio of copper strands to steel strands is in the range of 0.016-1.222, which allows the steel strands to improve support while ensuring flexibility and the conductivity of the copper strands.

[0013] (3) The bending diameter can be easily 10 times that of the lead wire, which is no more than 20 times the standard bending diameter. This greatly reduces the labor intensity of on-site installers and significantly reduces the installation difficulty. The soft cable body is conducive to buffering the stress concentration caused by rail vibration, and can achieve low temperature bending performance of -50℃.

[0014] (4) The steel and copper strands are covered with a wrapping tape, and the wrapping tape is covered with an insulating outer sheath. This is used to fix and wrap the steel and copper strands to achieve insulation from the outside environment.

[0015] (5) The first wire plate of the round copper tube terminal is tilted upward at 25° to 35°; the second wire plate of the square copper plate terminal is tilted downward at 25° to 35°. This improves the installation and use of the lead wire. Attached Figure Description

[0016] Figure 1 This is a side sectional view of the present invention;

[0017] Figure 2 This is a top sectional view of the present invention;

[0018] Figure 3 for Figure 1 Sectional view at point AA;

[0019] Figure 4 for Figure 1 A cross-sectional view of a circular copper tube terminal block;

[0020] Figure 5 for Figure 1 Cross-sectional view of a square copper plate terminal block.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1-Cable body, 11-Copper strand rope, 12-Steel strand rope, 13-Wrapping tape, 14-Insulating outer sheath;

[0023] 2- Circular copper tube terminal block, 21- First wire plate;

[0024] 3-Square copper plate terminal block, 31-Second wire plate. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0027] Example

[0028] The following is in conjunction with the appendix Figure 1-5 An example of a flexible, low-temperature resistant, protective choke transformer rail lead wire is described in the embodiments, such as... Figure 1 , 2 As shown in Figure 3, the cable includes a cable body 1. Both ends of the cable body 1 are respectively equipped with circular copper tube terminals 2 and square copper plate terminals 3. The cable body 1 includes multiple steel strands 12 and multiple copper strands 11. The steel strands 12 are made of multiple strands of fine steel wire twisted together. The copper strands 11 are made of multiple strands of fine copper wire twisted together. The multiple steel strands 12 are located at the center of the cable body 1, and the multiple copper strands 11 are arranged circumferentially around the outer edge.

[0029] The solid conductor has been replaced with multiple strands of soft wire, which not only meets the standards but also achieves good bending performance and conductor corrosion resistance. The softer texture makes the lead wire easier to bend and more flexible, reducing installation difficulty, minimizing breakage of the lead wire due to vibration, and increasing service life.

[0030] like Figure 3 As shown, there are 8 copper strands 11 and 29 steel strands 12. The ratio of the cross-sectional area of ​​the copper strands 11 to the steel strands 12 must be in the range of 0.016-1.222 so that the steel strands 12 can improve the support while ensuring the flexibility and conductivity of the copper strands 11.

[0031] The standard bending diameter of no more than 20 times the diameter of the lead wire can be easily achieved to a bending diameter of no more than 10 times the diameter of the lead wire, greatly reducing the labor intensity of on-site installers and significantly reducing the difficulty of installation. The soft cable body is conducive to buffering the stress concentration caused by rail vibration, and at the same time, it can achieve low-temperature bending performance of -50℃.

[0032] like Figure 3 As shown, the steel strand rope 12 and the copper strand rope 11 are covered with a wrapping tape 13, and the wrapping tape 13 is covered with an insulating outer sheath 14. This is used to fix and wrap the steel strand rope 12 and the copper strand rope 11, so as to achieve the effect of insulation from the outside environment.

[0033] like Figure 4 and 5 As shown, the circular copper tube terminal 2 includes a first wire plate 21, which is inclined upwards at 25° to 35°; the square copper plate terminal 3 includes a second wire plate 31, which is inclined downwards at 25° to 35°. This improves the installation and use of the lead wire.

[0034] In the description of this utility model, the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for describing this utility model and do not require that this utility model be constructed or operated in a specific orientation, and therefore should not be construed as limiting this utility model. The terms "connected" and "linked" in this utility model should be interpreted broadly. For example, they can refer to a connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A flexible, low-temperature resistant, protective choke transformer rail lead wire, characterized in that, The cable body (1) includes a cable body (1), with a circular copper tube terminal (2) and a square copper plate terminal (3) at both ends of the cable body (1). The cable body (1) includes multiple steel strands (12) and multiple copper strands (11). The steel strand (12) is made of multiple thin steel wires twisted together.

2. The flexible low-temperature resistant protective choke transformer rail lead wire according to claim 1, characterized in that, The steel strand (12) and copper strand (11) are provided with a wrapping tape (13), and the wrapping tape (13) is provided with an insulating outer sheath (14).

3. The flexible low-temperature resistant protective choke transformer rail lead wire according to claim 1, characterized in that, The copper strand (11) is made of multiple thin copper wires twisted together.

4. The flexible low-temperature resistant protective choke transformer rail lead wire according to claim 3, characterized in that, Multiple steel strands (12) are located at the center of the cable body (1), and multiple copper strands (11) are arranged circumferentially around the outside.

5. The flexible low-temperature resistant protective choke transformer rail lead wire according to claim 1, characterized in that, The circular copper tube terminal (2) includes a first wire plate (21) which is inclined upward at 25° to 35°; the square copper plate terminal (3) includes a second wire plate (31) which is inclined downward at 25° to 35°.

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