CN210016002U - High tension cable L type connector for EMUs - Google Patents
High tension cable L type connector for EMUs Download PDFInfo
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- CN210016002U CN210016002U CN201921362146.5U CN201921362146U CN210016002U CN 210016002 U CN210016002 U CN 210016002U CN 201921362146 U CN201921362146 U CN 201921362146U CN 210016002 U CN210016002 U CN 210016002U
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Abstract
The utility model relates to a high tension cable L type connector for EMUs. The connector comprises a protection unit and a pair of L-shaped joint units arranged in the protection unit; the pair of joint units are connected through an L-shaped connecting piece, and the L-shaped connecting piece comprises an L-shaped central conductor and an L-shaped insulating sleeve which are sleeved; the joint unit comprises a contact head, a stress cone, a compression fitting and a protection fitting which are sequentially arranged; and grooves matched with the contact heads and the stress cones are arranged at two ends of the L-shaped central conductor. High tension cable L type connector for EMUs, simple structure, but plug, simple to operate, fire resistance are good, installation easy maintenance, stability are high, can effectively deal with arranging of cable among EMUs high-pressure jumper wire system, are suitable for extensive popularization.
Description
Technical Field
The utility model relates to a high tension cable L type connector for EMUs belongs to EMUs power equipment's technical field.
Background
With the continuous improvement of the transportation industry in China, China motor train units have come to the golden period of construction and development, wherein the 27.5kV L-shaped connector is an important component of a traction power supply system of the motor train units, and the reliability of the connector directly influences the safe operation of the motor train units. The L-shaped connector is arranged at the top of the train of the motor train unit and is connected with the cables between the carriage and the carriage, the function of the L-shaped connector is the same as that of a middle joint for connecting two sections of cables in the power system, the two ends of the cables connected with the middle joint in the power system are on the same straight line, the two connecting cables on the train of the motor train unit are respectively positioned in the middle of the top of the train and in a hidden pipe at the edge of the top of the train, and the directions of the two cables are consistent with the. In order to meet the cable connection requirements of the motor train unit, the L-shaped connector is produced.
With the continuous development of the rail transit industry in recent years, the national requirement on the performance of the 27.5kV L-shaped connector for the motor train unit is higher and higher, the product is imported abroad at present, the product is monopolized by enterprises such as Taike, France Kerson, Hitachi and the like, the supply price of the product is high, the performance of the product cannot completely meet the use requirement, and the development of the motor train unit industry in China is severely restricted.
And the foreign imported products can not completely meet the use requirements in the following performance aspects: the arrangement of cables in a high-voltage jumper system of the motor train unit cannot be effectively dealt with; the electrical performance requirements specified in GB/T28427-; the pluggable function can not be completely met, and the installation and later maintenance of the product are inconvenient; the flame retardant requirements (DIN 5510-2 burning class S4, smoke class SR2, drippings class ST 2; EN44545-2 oxygen index R22/R23, smoke density R22/R23, toxicity test R22/R23) cannot be completely met; the requirement of surface pressure stability within 30 years cannot be completely met. At present, the performance of the 27.5kV L-shaped connector seriously restricts the development of railway transportation in China. Therefore, the development of the 27.5kV L-shaped connector has very important value for the railway development in China.
SUMMERY OF THE UTILITY MODEL
To prior art not enough, the utility model provides a high tension cable L type connector for EMUs.
The technical scheme of the utility model is that:
a high-voltage cable L-shaped connector for a motor train unit comprises a protection unit and a pair of L-shaped joint units arranged in the protection unit; the pair of joint units are connected through an L-shaped connecting piece, and the L-shaped connecting piece comprises an L-shaped central conductor and an L-shaped insulating sleeve which are sleeved; the joint unit comprises a contact head, a stress cone, a compression fitting and a protection fitting which are sequentially arranged; grooves matched with the contact heads and the stress cones are formed in the two ends of the L-shaped central conductor;
one end of the contact is connected with the L-shaped central conductor in a pluggable manner, and the other end of the contact is connected with the cable; the stress cone is of a conical structure, and an upper inclined plane and a lower inclined plane which are matched with the grooves at the end part of the L-shaped central conductor and the compression hardware fittings are respectively arranged at two ends of the stress cone; the stress cone is sleeved with the cable and then embedded into a groove arranged at the end part of the L-shaped central conductor; the compression hardware fitting is of a cylindrical structure, an inclined plane structure matched with the lower inclined plane is arranged on the inner side of one end of the compression hardware fitting, the other end of the compression hardware fitting is connected with a compression spring, and the other end of the compression spring acts on the protection hardware fitting; the stress cone is embedded in the L-shaped insulating sleeve;
the protection unit comprises an L-shaped protection shell and an L-shaped cover plate matched with the L-shaped protection shell; the two ends of the protection unit are provided with openings, and the joint unit is embedded in the openings at the end part of the protection unit; the protection hardware is connected with the opening at the end part of the protection unit in a sealing mode.
Preferably, the L-shaped insulating sleeve consists of a long pipe and a short pipe. The insulation sleeve is short and long, so that the installation units can be distinguished conveniently.
Preferably, the L-shaped central conductor is made of one of aluminum, aluminum alloy, copper or copper alloy, and the surface layer is plated; the L-shaped insulating sleeve is made of one of epoxy resin or glass fiber reinforced plastic; the stress cone is made of one of ethylene propylene diene monomer or silicone rubber; the contact is one of aluminum, aluminum alloy, copper or copper alloy, and the surface layer is plated; the compression hardware fitting is made of one of aluminum, aluminum alloy, copper alloy stainless steel or glass fiber reinforced plastic; the protection hardware fitting is one of aluminum, aluminum alloy, copper alloy or stainless steel; inorganic flame retardants and organic flame retardants are added into the components of the L-shaped insulating sleeve and the stress cone; the protection unit is made of one of aluminum, aluminum alloy, copper alloy or stainless steel, and is subjected to surface plating treatment. The salt spray test GB/T2423.17-2009 can be met through the coating design.
Further preferably, the aluminum alloy includes an Al-Cu-based alloy, an Al-Mg-Si-based alloy, an Al-Cu-Mg-based alloy; the copper alloy comprises beryllium bronze.
Preferably, the L-shaped insulating sleeve is a cross-linked cured molding structure, and the L-shaped central conductor is embedded in the L-shaped insulating sleeve. The traditional similar structure product has the problems that the electrical performance is affected by the abnormity of peeling, bubbles and the like easily caused by the difficulty in controlling the cohesiveness of the insulating material used by the insulating sleeve and the metal material of the central conductor, and the insulating material is aged and punctured finally due to the generation of partial discharge in the use process. And the bonding strength of the contact surface of the L-shaped central conductor and the L-shaped insulating sleeve is increased, so that the abnormalities such as peeling of two materials, air bubbles and the like are avoided.
Preferably, a watchband finger spring piece jack structure is arranged in the groove at the end part of the L-shaped central conductor. The contact head and the central conductor are in a plug-in connection mode, a watchband structure is designed in the inner cavity of the central conductor to be conducted with the contact head, so that the allowable requirement of high current can be met, the plug-in installation can be realized for more than 30 times, and the installation and the maintenance of products are facilitated.
Preferably, the L-shaped insulating sleeve is used with the matching length H of 320 +/-50 mm and the diameter D of phi 138 mm.
The utility model has the advantages that:
1. the high-voltage cable L-shaped connector for the motor train unit has the advantages of simple structure, plug-pull, convenient installation, good flame retardance, convenient installation and maintenance, high stability, capability of effectively dealing with the arrangement of cables in a high-voltage jumper system of the motor train unit, and suitability for large-scale popularization;
2. the high-voltage cable L-shaped connector for the motor train unit is L-shaped, can effectively deal with the arrangement of cables in a high-voltage jumper system of the motor train unit, and can meet the salt spray test GB/T2423.17-2009; after the L-shaped central conductor is matched with the stress cone, the electrical performance requirements (the alternating current withstand voltage of 124kV x 5min is not subjected to flashover and breakdown, and the impact voltage of +/-250 kV x 10 times is not subjected to flashover and breakdown) specified by GB/T28427-;
3. the L-shaped connector and the central conductor are arranged into a plug-in structure, so that the installation and the maintenance are easy; the compression fitting can provide external force for the stress cone, and can effectively ensure the stability of surface pressure between the L-shaped central conductor and the stress cone within 30 years.
Drawings
FIG. 1 is a schematic structural diagram of a high-voltage cable L-shaped connector for a motor train unit according to embodiment 1;
fig. 2 is a schematic view of a matching structure of the L-shaped central conductor and the L-shaped insulating sleeve according to the present invention;
fig. 3 is a schematic structural view of the stress cone of the present invention;
fig. 4 is a schematic structural diagram of the compression fitting of the present invention;
fig. 5 is a schematic structural diagram of the protection fitting of the present invention;
wherein: 1. the device comprises an L-shaped protective shell, 2, an L-shaped central conductor, 3, an L-shaped insulating sleeve, 4, a contact head, 5, a stress cone, 6, a compression fitting, 7, a protection fitting, 8, an L-shaped cover plate, 9, an upper inclined plane, 10 and a lower inclined plane.
Detailed Description
The present invention will be further described with reference to the following examples and drawings, but is not limited thereto.
Example 1
As shown in fig. 1-5.
A high-voltage cable L-shaped connector for a motor train unit comprises a protection unit and a pair of L-shaped joint units arranged in the protection unit; the pair of joint units are connected through an L-shaped connecting piece, and the L-shaped connecting piece comprises an L-shaped central conductor 2 and an L-shaped insulating sleeve 3 which are sleeved; the joint unit comprises a contact head 4, a stress cone 5, a compression fitting 6 and a protection fitting 7 which are sequentially arranged; grooves matched with the contact head 4 and the stress cone 5 are formed in the two ends of the L-shaped central conductor 2;
one end of the contact 4 is connected with the L-shaped central conductor 2 in a pluggable manner, and the other end of the contact is connected with a cable; the stress cone 5 is of a conical structure, and an upper inclined plane 9 and a lower inclined plane 10 which are matched with the groove at the end part of the L-shaped central conductor 2 and the compression hardware fitting 6 are respectively arranged at two ends of the stress cone 5; the stress cone 5 is sleeved with the cable and then embedded into a groove arranged at the end part of the L-shaped central conductor 2; the compression hardware fitting 6 is of a cylindrical structure, an inclined plane structure matched with the lower inclined plane 10 is arranged on the inner side of one end of the compression hardware fitting 6, the other end of the compression hardware fitting is connected with a compression spring, and the other end of the compression spring acts on the protection hardware fitting 7; the stress cone 5 is embedded in the L-shaped insulating sleeve 3;
the protection unit comprises an L-shaped protection shell 1 and an L-shaped cover plate 8 matched with the L-shaped protection shell 1; the two ends of the protection unit are provided with openings, and the joint unit is embedded in the openings at the end part of the protection unit; the protection fitting 7 is connected with the opening at the end of the protection unit in a sealing manner.
The L-shaped central conductor 2 is made of aluminum alloy, and the surface layer is subjected to silver plating treatment; the L-shaped insulating sleeve 3 is made of epoxy resin; the stress cone 5 is made of ethylene propylene diene monomer; the contact 4 is made of aluminum alloy, and the surface layer is subjected to silver plating treatment; the compression hardware fittings 6 and the protection hardware fittings 7 are made of aluminum alloy; the components of the L-shaped insulating sleeve 3 and the stress cone 5 are both added with inorganic flame retardant and organic flame retardant; the protection unit is made of aluminum alloy, and the surface layer is subjected to silver plating treatment. The salt spray test GB/T2423.17-2009 can be met through the coating design. The aluminum alloy is Al-Cu alloy. The inorganic flame retardant is Al (OH)3The organic flame retardant is brominated.
The using matching length H of the L-shaped insulating sleeve is 370mm, and the diameter D of the L-shaped insulating sleeve is phi 138 mm.
Example 2
The high-voltage cable L-shaped connector for the motor train unit as in embodiment 1, further, the L-shaped insulating sleeve 3 is composed of a long pipe and a short pipe. The insulation sleeve is short and long, so that the installation units can be distinguished conveniently.
Example 3
The high-voltage cable L-shaped connector for the motor train unit according to embodiment 1, further, the L-shaped insulating sleeve 3 is a cross-linked cured molding structure, and the L-shaped central conductor 2 is embedded in the L-shaped insulating sleeve 3. The traditional similar structure product has the problems that the electrical performance is affected by the abnormity of peeling, bubbles and the like easily caused by the difficulty in controlling the cohesiveness of the insulating material used by the insulating sleeve and the metal material of the central conductor, and the insulating material is aged and punctured finally due to the generation of partial discharge in the use process. And the bonding strength of the contact surface of the L-shaped central conductor 2 and the L-shaped insulating sleeve 3 is increased, so that the abnormalities of peeling of two materials, air bubbles and the like are avoided.
The performance test table of the L-shaped connector described in this embodiment is shown in table 1;
table 1: EXAMPLE 1 Performance test Meter
As can be seen from the test data in table 1, the performance index of the L-shaped connector in this embodiment meets the use requirement in the field of rail transit.
Example 4
The high-voltage cable L-shaped connector for the motor train unit in the embodiment 1 is further provided with a watchband contact finger reed jack structure in a groove at the end part of the L-shaped central conductor 2. The contact head and the central conductor are in a plug-in connection mode, a watchband structure is designed in the inner cavity of the central conductor to be conducted with the contact head, so that the allowable requirement of high current can be met, the plug-in installation can be realized for more than 30 times, and the installation and the maintenance of products are facilitated.
Claims (5)
1. A high-voltage cable L-shaped connector for a motor train unit is characterized by comprising a protection unit and a pair of L-shaped joint units arranged in the protection unit; the pair of joint units are connected through an L-shaped connecting piece, and the L-shaped connecting piece comprises an L-shaped central conductor and an L-shaped insulating sleeve which are sleeved; the joint unit comprises a contact head, a stress cone, a compression fitting and a protection fitting which are sequentially arranged; grooves matched with the contact heads and the stress cones are formed in the two ends of the L-shaped central conductor;
one end of the contact is connected with the L-shaped central conductor in a pluggable manner, and the other end of the contact is connected with the cable; the stress cone is of a conical structure, and an upper inclined plane and a lower inclined plane which are matched with the grooves at the end part of the L-shaped central conductor and the compression hardware fittings are respectively arranged at two ends of the stress cone; the stress cone is sleeved with the cable and then embedded into a groove arranged at the end part of the L-shaped central conductor; the compression hardware fitting is of a cylindrical structure, an inclined plane structure matched with the lower inclined plane is arranged on the inner side of one end of the compression hardware fitting, the other end of the compression hardware fitting is connected with a compression spring, and the other end of the compression spring acts on the protection hardware fitting; the stress cone is embedded in the L-shaped insulating sleeve;
the protection unit comprises an L-shaped protection shell and an L-shaped cover plate matched with the L-shaped protection shell; the two ends of the protection unit are provided with openings, and the joint unit is embedded in the openings at the end part of the protection unit; the protection hardware is connected with the opening at the end part of the protection unit in a sealing mode.
2. The L-shaped connector for the high-voltage cable of the motor train unit as claimed in claim 1, wherein the L-shaped insulating sleeve is composed of a long pipe and a short pipe.
3. The L-shaped connector of the high-voltage cable for the motor train unit as claimed in claim 1, wherein the L-shaped insulating sleeve is a cross-linked cured molding structure, and the L-shaped central conductor is embedded in the L-shaped insulating sleeve.
4. The L-shaped connector of the high-voltage cable for the motor train unit as claimed in claim 1, wherein a watchband contact finger spring sheet jack structure is arranged in the groove at the end of the L-shaped center conductor.
5. The L-shaped high-voltage cable connector for the motor train unit as claimed in claim 1, wherein the L-shaped insulating sleeve has a use fit length H of 320 +/-50 mm and a diameter D of phi 138 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921362146.5U CN210016002U (en) | 2019-08-21 | 2019-08-21 | High tension cable L type connector for EMUs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921362146.5U CN210016002U (en) | 2019-08-21 | 2019-08-21 | High tension cable L type connector for EMUs |
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| Publication Number | Publication Date |
|---|---|
| CN210016002U true CN210016002U (en) | 2020-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921362146.5U Active CN210016002U (en) | 2019-08-21 | 2019-08-21 | High tension cable L type connector for EMUs |
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| CN (1) | CN210016002U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380255A (en) * | 2019-08-21 | 2019-10-25 | 中车青岛四方车辆研究所有限公司 | A kind of EMU high-tension cable L-type connector |
-
2019
- 2019-08-21 CN CN201921362146.5U patent/CN210016002U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380255A (en) * | 2019-08-21 | 2019-10-25 | 中车青岛四方车辆研究所有限公司 | A kind of EMU high-tension cable L-type connector |
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