CN212848920U - Intermediate joint of AC/DC cable - Google Patents
Intermediate joint of AC/DC cable Download PDFInfo
- Publication number
- CN212848920U CN212848920U CN202021980195.8U CN202021980195U CN212848920U CN 212848920 U CN212848920 U CN 212848920U CN 202021980195 U CN202021980195 U CN 202021980195U CN 212848920 U CN212848920 U CN 212848920U
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- cable
- metal cylinder
- field intensity
- stress cone
- homogenizing
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Abstract
The utility model discloses an alternating current-direct current cable intermediate head, include: the cable comprises a metal cylinder, two flanges hermetically connected with two ends of the metal cylinder, a conductor connecting device positioned in the metal cylinder, two cable end field intensity equalizing devices symmetrically arranged at the end part of the inner side of the metal cylinder and connected with the flanges, and an insulating medium positioned in the metal cylinder, wherein a conducting rod is arranged at the end part of the field intensity equalizing devices; the field intensity homogenizing device is used for homogenizing an electric field at the cable joint; the conductor connecting device is used for connecting the conducting rods which are respectively arranged at the end parts of the field intensity homogenizing devices, so that the connection of the cable connectors is realized. Because the field intensity homogenizing device and the conductor connecting device are adopted to realize the connection of the cable joint, and the insulating medium is filled in the metal cylinder, the cable joint is shortened, the installation and the disassembly are easy, the size is small, the field intensity is homogenized, the breakdown is not easy, the safety is high, the insulating property can be monitored by monitoring the change of the internal air pressure, and the installation, the manufacture and the replacement are convenient.
Description
Technical Field
The utility model relates to an alternating current-direct current cable intermediate head belongs to alternating current-direct current cable junction technical field.
Background
The commonly adopted method of the intermediate joint for connecting the existing AC/DC cables is as follows: whole prefabricated formula and combination prefabricated formula, these two kinds of structrual installations preparation are inconvenient, and cable joint is longer, the size is great, and the field intensity of joint department is concentrated, leads to the cable to puncture easily, destroys power line, and is difficult for monitoring insulating properties.
SUMMERY OF THE UTILITY MODEL
For solving prior art's not enough, the utility model aims to provide an alternating current-direct current cable intermediate head has solved that current intermediate head cable joint is longer, the size is great, and the field intensity of joint department is concentrated, leads to the cable to puncture easily, installs the preparation and changes inconvenient problem.
In order to achieve the above object, the utility model adopts the following technical scheme: an AC/DC cable intermediate joint, comprising: the cable comprises a metal cylinder, two flanges hermetically connected with two ends of the metal cylinder, a conductor connecting device positioned in the metal cylinder, two cable end field intensity equalizing devices symmetrically arranged at the end part of the inner side of the metal cylinder and connected with the flanges, and an insulating medium positioned in the metal cylinder, wherein a conducting rod is arranged at the end part of the field intensity equalizing devices; the field intensity homogenizing device is used for homogenizing an electric field at the cable joint; the conductor connecting device is used for connecting the conducting rods which are respectively arranged at the end parts of the field intensity homogenizing devices, so that the connection of the cable connectors is realized.
Further, the field intensity uniformizing device comprises: the cable comprises an epoxy cover, a spring contact finger positioned at the end part of the epoxy cover, a stress cone positioned in the epoxy cover and a stress cone fastening device, wherein the stress cone is used for being sleeved at the specified position of the cable, the cable sleeved with the stress cone is inserted into the epoxy cover, a conductor at the end part of the cable is inserted into the spring contact finger, and the stress cone fastening device is used for fastening the stress cone.
Furthermore, the stress cone fastening device is a spring cone support.
Further, the metal cylinder is made of a non-magnetic material.
Further, the conducting rod is a hollow aluminum tube.
Further, the insulating medium is a non-polar or weakly polar medium.
Further, the nonpolar or weakly polar medium is nitrogen or SF6One or two of them are mixed.
The utility model discloses the beneficial effect who reaches: because the field intensity homogenizing device and the conductor connecting device are adopted to realize the connection of the cable joint, and the insulating medium is filled in the metal cylinder, the cable joint is shortened, the installation and the disassembly are easy, the size is small, the field intensity is homogenized, the breakdown is not easy, the safety is high, the insulating property can be monitored by monitoring the change of the internal air pressure, and the installation, the manufacture and the replacement are convenient. The device is suitable for joints of +/-200 kV- +/-1100 kV direct current cables and 66 kV-1000 kV alternating current cables.
Drawings
Fig. 1 is a schematic diagram of an intermediate joint of an alternating current and direct current cable in an embodiment.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, an intermediate joint for ac/dc cables includes: the cable comprises a metal cylinder 7, two flanges hermetically connected with two ends of the metal cylinder, a conductor connecting device 6 positioned in the metal cylinder, two cable end part field intensity equalizing devices symmetrically arranged at the end part of the inner side of the metal cylinder and connected with the flanges, and an insulating medium 5 positioned in the metal cylinder, wherein the end parts of the field intensity equalizing devices are provided with conducting rods;
the field intensity homogenizing device is used for homogenizing an electric field at the cable joint;
The field intensity homogenizing device comprises: the utility model discloses an epoxy cover 4, be located the spring of epoxy cover tip and touch and indicate, be located the stress cone 3 of epoxy cover, stress cone fastener 2, stress cone 3 is used for the cover at the assigned position of cable, will sheathe in the cable insertion epoxy cover 4 of stress cone 3, and the conductor of cable tip inserts in the spring touches and indicates, realizes that the cable conductor is connected with conductor connecting device, and stress cone fastener 2 is used for fastening stress cone, realizes the regulation to the power of hugging closely of stress cone through the compressive capacity of spring among the control stress cone fastener.
The stress cone fastening device is a spring cone support;
the metal cylinder is made of nonmagnetic materials such as aluminum alloy and the like.
The conducting rod is a hollow aluminum pipe;
the insulating medium 5 is a nonpolar or weakly polar medium which is nitrogen or SF6One or two of them are mixed. The insulating medium is permanently sealed inside the metal cylinder 7, the time consumed for assembly and disassembly is short, and the problem of polluting a test site does not exist in the operation process.
The using method comprises the following steps:
after the two cables 1 are treated according to the installation size, the cable insulation outer shields are ground and conductors with certain lengths are stripped, the two cables are respectively arranged in stress cones 3 in field intensity equalizing devices at two ends, the cable conductors are jacked into spring contact fingers of the field intensity equalizing devices, and the connection of the two cables is realized through a conductor connecting device.
Because adopt field intensity homogenizing device and conductor connecting device to realize cable joint and connect, pack insulating medium 5 in the metal cylinder for cable joint shortens, easy installation dismantlement, and the size is less, has homogenized field intensity and is difficult to puncture, and the security is high, and can monitor insulating properties through monitoring inside atmospheric pressure change, and installation preparation and change are convenient.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (7)
1. An alternating current-direct current cable intermediate head, characterized by includes: the cable comprises a metal cylinder, two flanges hermetically connected with two ends of the metal cylinder, a conductor connecting device positioned in the metal cylinder, two cable end field intensity equalizing devices symmetrically arranged at the end part of the inner side of the metal cylinder and connected with the flanges, and an insulating medium positioned in the metal cylinder, wherein a conducting rod is arranged at the end part of the field intensity equalizing devices;
the field intensity homogenizing device is used for homogenizing an electric field at the cable joint; the conductor connecting device is used for connecting the conducting rods which are respectively arranged at the end parts of the field intensity homogenizing devices, so that the connection of the cable connectors is realized.
2. The intermediate joint for AC/DC cables of claim 1, wherein the means for homogenizing field strength comprises: the cable comprises an epoxy cover, a spring contact finger positioned at the end part of the epoxy cover, a stress cone positioned in the epoxy cover and a stress cone fastening device, wherein the stress cone is used for being sleeved at the specified position of the cable, the cable sleeved with the stress cone is inserted into the epoxy cover, a conductor at the end part of the cable is inserted into the spring contact finger, and the stress cone fastening device is used for fastening the stress cone.
3. The intermediate joint for AC/DC cables as claimed in claim 2, wherein the stress cone fastening means is a spring cone holder.
4. The intermediate joint for AC/DC cables as claimed in claim 1, wherein the metal tube is made of non-magnetic material.
5. The intermediate joint for AC/DC cables as recited in claim 1, wherein the conductive rod is a hollow aluminum tube.
6. The intermediate joint for AC/DC cables as claimed in claim 1, wherein the insulating medium is a non-polar or weakly polar medium.
7. The intermediate joint for AC/DC cables as claimed in claim 6, wherein said non-polar or weakly polar medium is nitrogen or SF 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021980195.8U CN212848920U (en) | 2020-09-11 | 2020-09-11 | Intermediate joint of AC/DC cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021980195.8U CN212848920U (en) | 2020-09-11 | 2020-09-11 | Intermediate joint of AC/DC cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212848920U true CN212848920U (en) | 2021-03-30 |
Family
ID=75147018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021980195.8U Active CN212848920U (en) | 2020-09-11 | 2020-09-11 | Intermediate joint of AC/DC cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212848920U (en) |
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2020
- 2020-09-11 CN CN202021980195.8U patent/CN212848920U/en active Active
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