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High-voltage cable L type connector for motor train unit

A technology of high-voltage cables and EMUs, which is applied in vehicle connectors, cable connectors, connections, etc., can solve the problems of expensive supply, restricting the development of railway transportation, and restricting the development of EMU industry, and achieves convenient installation and maintenance, flame retardant Good performance and high stability

Pending Publication Date: 2019-10-25
CRRC QINGDAO SIFANG ROLLING STOCK RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, with the continuous development of the rail transit industry, the country has higher and higher performance requirements for 27.5kV L-type connectors for EMUs. At present, the products are imported from abroad, and the products are monopolized by companies such as Tyco in the United States, Nexans in France, and Hitachi in Japan. Its supply price is expensive and its performance cannot fully meet the requirements of use, which seriously restricts the development of my country's EMU industry
[0004] Moreover, foreign imported products cannot fully meet the use requirements in the following performance aspects: cannot effectively cope with the cable arrangement in the high-voltage jumper system of the EMU; cannot fully meet the electrical performance requirements specified in GB / T 28427-2012 (AC withstand voltage 124kV* No flashover or breakdown for 5 minutes, no breakdown or flashover for impulse voltage ±250kV*10 times); cannot fully meet the pluggable functions, and is inconvenient for product installation and later maintenance; cannot fully meet the flame retardant requirements ( DIN 5510-2 combustion grade S4, smoke grade SR2, dripping object grade ST2; EN44545-2 oxygen index R22 / R23, smoke density R22 / R23, toxicity test R22 / R23); cannot fully meet the pressure stability within 30 years sexual demands
At present, the performance of 27.5kV L-shaped connector seriously restricts the development of my country's railway transportation

Method used

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  • High-voltage cable L type connector for motor train unit
  • High-voltage cable L type connector for motor train unit
  • High-voltage cable L type connector for motor train unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like Figure 1-5 shown.

[0030] An L-shaped connector for a high-voltage cable for an EMU, comprising a protection unit and a pair of L-shaped joint units arranged in the protection unit; a pair of joint units are connected by an L-shaped connector, and the L-shaped connector includes The L-shaped central conductor 2 and the L-shaped insulating sleeve 3 are socketed; the joint unit includes a contact head 4, a stress cone 5, a compression fitting 6 and a protective fitting 7 arranged in sequence; the two parts of the L-shaped central conductor 2 The end is provided with a groove matching the contact head 4 and the stress cone 5;

[0031] One end of the contact head 4 is pluggably connected to the L-shaped central conductor 2, and the other end is connected to the cable; the stress cone 5 is a conical structure, and the two ends of the stress cone 5 are respectively provided with the ends of the L-shaped central conductor 2. The groove, the upper inclined surface 9 an...

Embodiment 2

[0036] As for the L-shaped connector for high-voltage cables for EMUs described in Embodiment 1, further, the L-shaped insulating sleeve 3 is composed of a long tube and a short tube. One is short and the other is long for insulating sleeves, which is convenient for distinguishing the installation units.

Embodiment 3

[0038]In the L-shaped connector for high-voltage cables for EMUs described in Embodiment 1, further, the L-shaped insulating sleeve 3 is a cross-linked and solidified structure, and the L-shaped central conductor 2 is embedded in the L-shaped insulating sleeve 3 . For traditional products with similar structures, due to the difficulty in controlling the adhesion between the insulating material used in the insulating sleeve and the central conductor metal material, the actual product is prone to peeling, air bubbles and other abnormalities that affect the electrical performance, and partial discharge occurs during use, which eventually leads to aging of the insulating material. breakdown problem. By increasing the bonding strength of the contact surface between the L-shaped central conductor 2 and the L-shaped insulating sleeve 3, abnormalities such as peeling off of the two materials and air bubbles are avoided.

[0039] The performance test table of the L-shaped connector des...

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Abstract

The invention relates to a high-voltage cable L type connector for a motor train unit. The connector comprises a protection unit and a pair of joint unit arranged in the L shape in the protection unit; the joint units are connected with an L-shaped connecting piece, and the L-shaped connecting piece comprises an L-shaped center conductor and an L shaped insulating sleeve which sleeves the center conductor; each joint unit comprises a contact, a stress cone, compression hardware and protection hardware arranged successively; and grooves cooperated with the corresponding contacts and stress cones are arranged in the two ends of the L-shaped center conductor respectively. The high-voltage cable L type connector for the motor train unit is simple in structure, pluggable, convenient to installand maintain, high in stability and flame resistance, and capable of handling cable arrangement in a high voltage jumper wire system of the motor train unit, and can be popularized widely.

Description

technical field [0001] The invention relates to an L-shaped connector for a high-voltage cable for an EMU, and belongs to the technical field of electric equipment for an EMU. Background technique [0002] With the continuous improvement of my country's transportation industry, China's EMUs have ushered in a golden age of construction and development. The 27.5kV L-shaped connector is an important part of the EMU traction power supply system, and its reliability directly affects the safe operation of the EMU. Among them, the L-shaped connector is installed on the top of the EMU train and connects the cables between the carriages. Its function is the same as that of the middle joint connecting two sections of cables in the power system, but the two ends of the cable connected by the middle joint in the power system are in the same straight line. On the EMU train, the two connecting cables are respectively located in the middle of the top of the train and in the dark pipe on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R13/02H01R13/03H01R13/40H01R13/502H01R13/527H01R13/53H01R13/533H01R24/00H01R31/06H02G15/08
CPCH01R13/02H01R13/03H01R13/40H01R13/502H01R13/527H01R13/53H01R13/533H01R24/00H01R31/06H02G15/08H01R2201/26
Inventor 昝海斌陈猛猛陆开元住本勉王振刘彬杨黎明张存生王龙王景兵曾辉
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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