CN217036726U - Combined prefabricated intermediate joint for high-voltage cable - Google Patents
Combined prefabricated intermediate joint for high-voltage cable Download PDFInfo
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- CN217036726U CN217036726U CN202220521313.1U CN202220521313U CN217036726U CN 217036726 U CN217036726 U CN 217036726U CN 202220521313 U CN202220521313 U CN 202220521313U CN 217036726 U CN217036726 U CN 217036726U
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Abstract
The utility model discloses a combined prefabricated intermediate joint for a high-voltage cable. The novel epoxy resin cable comprises a metal shell and an epoxy resin prefabricated sleeve, wherein a flange is arranged at one end of the outer side of the epoxy resin prefabricated sleeve, a flange is installed at one end of the metal shell, the flange is installed on the side face of the flange, and the metal shell is directly grounded. The utility model has the beneficial effects that: the metal shell of the combined prefabricated intermediate joint can be directly grounded independently without being indirectly grounded through the adjacent metal tail pipes, namely the metal shell of the intermediate joint can be electrically connected with the two tail pipes; the safety of the product is greatly improved, and the electrical stability of the intermediate joint is improved.
Description
Technical Field
The utility model relates to the technical field of power cable accessories, in particular to a combined prefabricated intermediate joint for a high-voltage cable.
Background
The metal shell of the prefabricated intermediate joint of the high-voltage cable combination can normally work only by reliable grounding. Such grounding should, in theory, be a direct grounding of the metal housing by means of a grounding cable. However, in the design of similar products in the industry at present, the metal shell is directly connected with the metal tail pipe, and the metal shell is indirectly grounded through a grounding terminal of the metal tail pipe.
When the ground terminal of the metal tail tube is connected to the sheath protector through the ground cable, the metal tail tube cannot be directly grounded. In this case, when the cable is running, a certain induced voltage is generated on the metal tail pipe which is not directly grounded, so that the metal shell of the joint connected with the tail pipe is also electrified. This has the effect that the safety of the product is compromised and, in the event of excessive disturbance of the induced voltage on the metal tailpipe, the electrical stability of the connector may be compromised.
SUMMERY OF THE UTILITY MODEL
The utility model provides a safe, reliable and electrically stable combined prefabricated intermediate joint for a high-voltage cable, aiming at overcoming the defects in the prior art.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a prefabricated formula intermediate head of combination for high tension cable, includes metal casing and the prefabricated sleeve pipe of epoxy, the outside one end of the prefabricated sleeve pipe of epoxy is equipped with the flange, the flange is installed to metal casing's one end, flange mounting on the side of flange, metal casing's ground connection mode is direct ground connection.
The metal shell is connected with the epoxy resin prefabricated sleeve through a flange, wherein one end of the epoxy resin prefabricated sleeve is provided with a flange with a proper width for fixing the flange of the metal shell. The design ensures that the metal shell of the combined prefabricated intermediate joint can be independently and directly grounded without being indirectly grounded through the adjacent metal tail pipes, namely the metal shell of the intermediate joint can be electrically connected with the two tail pipes. Therefore, the safety of the product is greatly improved, and the electrical stability of the intermediate joint is improved.
Preferably, a plurality of metal inserts which are uniformly distributed are arranged on the side face of the flange, threaded holes are formed in the metal inserts, a flange on the metal shell is in contact with the metal inserts, bolts are arranged on the flange, and the flange on the metal shell is arranged on the metal inserts of the flange through the matching of the bolts and the threaded holes. The metal shell is connected with the epoxy resin prefabricated sleeve through the flange and the bolts, the metal inserts can be embedded in the side face of the flange in advance and used for fixing the flange of the metal shell, the metal inserts correspond to the screw holes and can be used for stably fixing the flange of the metal shell on the side face of the flange through the bolts.
Preferably, the metal housing is made of one of an aluminum alloy material, a copper material or a copper alloy material. The design is such that the metal shell needs to be reliably grounded during normal operation of the intermediate joint.
Preferably, a first cavity and a second cavity are arranged in the epoxy resin prefabricated sleeve, a first high-voltage cable is installed in the first cavity, a first rubber stress cone is arranged in the first cavity, a first conductor is arranged in the first high-voltage cable, the first conductor in the first high-voltage cable is installed in the first rubber stress cone in the first cavity, a second high-voltage cable is installed in the second cavity, a second rubber stress cone is arranged in the second cavity, a second conductor is arranged in the second high-voltage cable, the second conductor in the second high-voltage cable is installed in the second rubber stress cone in the second cavity, and the first conductor and the second conductor are electrically connected. The design enables the two high-voltage cables to be connected safely and reliably.
Preferably, the metal shell is arranged in the middle of the epoxy resin prefabricated sleeve, the length of the metal shell is smaller than that of the epoxy resin prefabricated sleeve, and a sealing layer is arranged between the metal shell and the epoxy resin prefabricated sleeve. The design avoids the indirect grounding of the metal shell through the tail pipe and ensures the direct grounding treatment of the metal shell.
The utility model has the beneficial effects that: the metal shell of the combined prefabricated intermediate joint can be directly grounded independently without being indirectly grounded through the adjacent metal tail pipes, namely the metal shell of the intermediate joint can be electrically connected with the two tail pipes; the safety of the product is greatly improved, and the electrical stability of the intermediate joint is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of the structure at a in fig. 1.
In the figure: 1. the cable comprises a metal shell, 2 parts of an epoxy resin prefabricated sleeve, 3 parts of a flange, 4 parts of bolts, 5 parts of a flange, 6 parts of a metal insert, 7 parts of a threaded hole, 8 parts of a first cavity, 9 parts of a second cavity, 10 parts of a first high-voltage cable, 11 parts of a second high-voltage cable, 12 parts of a first rubber stress cone, 13 parts of a second rubber stress cone, 14 parts of a first conductor, 15 parts of a second conductor and 16 parts of a sealing layer.
Detailed Description
The utility model is further described with reference to the following figures and detailed description.
In the embodiment shown in fig. 1 and 2, the combined prefabricated intermediate joint for the high-voltage cable comprises a metal shell 1 and an epoxy resin prefabricated sleeve 2, wherein a flange 5 is arranged at one end of the outer side of the epoxy resin prefabricated sleeve 2, a flange 3 is arranged at one end of the metal shell 1, the flange 3 is arranged on the side surface of the flange 5, and the metal shell 1 is directly grounded. The side face of the flange 5 is provided with a plurality of metal inserts 6 which are uniformly distributed, the metal inserts 6 are provided with threaded holes 7, the flange 3 on the metal shell 1 is in contact with the metal inserts 6, the flange 3 is provided with bolts 4, and the flange 3 on the metal shell 1 is arranged on the metal inserts 6 of the flange 5 through the matching of the bolts 4 and the threaded holes 7. The metal shell 1 is made of one of an aluminum alloy material, a copper material or a copper alloy material. Be equipped with first cavity 8 and second cavity 9 in the prefabricated sleeve pipe of epoxy 2, install first high tension cable 10 in the first cavity 8, be equipped with first rubber stress awl 12 in the first cavity 8, there is first conductor 14 in the first high tension cable 10, first conductor 14 in the first high tension cable 10 is installed in first rubber stress awl 12 in first cavity 8, install second high tension cable 11 in the second cavity 9, be equipped with second rubber stress awl 13 in the second cavity 9, there is second conductor 15 in the second high tension cable 11, second conductor 15 in the second high tension cable 11 is installed in second rubber stress awl 13 in the second cavity 9, first conductor 14 and second conductor 15 electricity are connected. The metal shell 1 is arranged in the middle of the epoxy resin prefabricated sleeve 2, the length of the metal shell 1 is smaller than that of the epoxy resin prefabricated sleeve 2, and a sealing layer 16 is arranged between the metal shell 1 and the epoxy resin prefabricated sleeve 2.
The metal shell 1 and the epoxy resin prefabricated sleeve 2 are connected through a flange 3 and a plurality of bolts 4, wherein one end of the epoxy resin prefabricated sleeve 2 is provided with a flange 5 with a proper width, a plurality of metal inserts 6 can be embedded in the side face of the flange 5, and the metal inserts 6 are used for fixing the flange 3 of the metal shell 1. The metal insert 6 is used to securely fix the flange 3 of the metal shell 1 to the side of the flange 5 by means of the bolts 4 corresponding to the screw holes, so that the metal shell 1 is securely connected to the epoxy resin prefabricated casing 2. The metal shell 1 can be made of an aluminum alloy material, or can be made of copper or an alloy copper material, so that when the intermediate joint is in a normal operation state, the metal shell 1 needs to be reliably grounded, and the grounding mode of the metal shell 1 can be direct grounding. The epoxy resin prefabricated sleeve 2 is provided with a first cavity 8 and a second cavity 9 which are opposite and used for accommodating a first high-voltage cable 10, a second high-voltage cable 11, a first rubber stress cone 12 and a second rubber stress cone 13 which are matched with the first high-voltage cable and the second high-voltage cable; the first conductor 14 of the first high voltage cable 10 is electrically connected to the second conductor 15 of the second high voltage cable 11 by means of the joint inner structure. In the gap between the metal shell 1 and the epoxy prefabricated sleeve, a suitable sealing layer 16 may be filled to support the entire metal shell.
The high-voltage cable may be an ac power cable (with a typical rated voltage of 35kV, 66kV, 110kV, 220kV, 330kV, 500kV, etc.), or a dc power cable (with a typical rated voltage of 100kV, 160kV, 200kV, 250kV, 320kV, 400kV, 500kV, etc.). The design ensures that the metal shell 1 of the combined prefabricated intermediate joint can be independently and directly grounded without being indirectly grounded through the adjacent metal tail pipes, namely, the metal shell 1 of the intermediate joint can be electrically connected with two tail pipes. Therefore, the safety of the product is greatly improved, and the electrical stability of the intermediate joint is improved.
Claims (5)
1. The utility model provides a prefabricated formula intermediate head of combination for high tension cable, characterized by includes metal casing (1) and prefabricated sleeve pipe of epoxy (2), the outside one end of prefabricated sleeve pipe of epoxy (2) is equipped with flange (5), flange (3) are installed to the one end of metal casing (1), flange (3) install on the side of flange (5), the ground mode of metal casing (1) is direct ground connection.
2. The combined prefabricated intermediate joint for the high-voltage cable according to claim 1, wherein a plurality of metal inserts (6) are uniformly distributed on the side surface of the flange (5), threaded holes (7) are formed in the metal inserts (6), a flange (3) on the metal shell (1) is in contact with the metal inserts (6), bolts (4) are arranged on the flange (3), and the flange (3) on the metal shell (1) is installed on the metal inserts (6) of the flange (5) through the matching of the bolts (4) and the threaded holes (7).
3. The combined prefabricated intermediate joint for high-voltage cables as claimed in claim 1 or 2, wherein the metal shell (1) is made of one of an aluminum alloy material, a copper material or a copper alloy material.
4. The combined prefabricated intermediate joint for the high-voltage cable according to claim 1, wherein a first cavity (8) and a second cavity (9) are arranged in the epoxy resin prefabricated sleeve (2), a first high-voltage cable (10) is installed in the first cavity (8), a first rubber stress cone (12) is arranged in the first cavity (8), a first conductor (14) is arranged in the first high-voltage cable (10), the first conductor (14) in the first high-voltage cable (10) is installed in the first rubber stress cone (12) in the first cavity (8), a second high-voltage cable (11) is installed in the second cavity (9), a second rubber stress cone (13) is arranged in the second cavity (9), a second conductor (15) is arranged in the second high-voltage cable (11), and the second conductor (15) in the second high-voltage cable (11) is installed in the second rubber stress cone (9) The first conductor (14) and the second conductor (15) are electrically connected in the cone (13).
5. The combined prefabricated intermediate joint for the high-voltage cable as claimed in claim 1, wherein the metal shell (1) is placed in the middle of the epoxy resin prefabricated sleeve (2), the length of the metal shell (1) is less than that of the epoxy resin prefabricated sleeve (2), and a sealing layer (16) is arranged between the metal shell (1) and the epoxy resin prefabricated sleeve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220521313.1U CN217036726U (en) | 2022-03-11 | 2022-03-11 | Combined prefabricated intermediate joint for high-voltage cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220521313.1U CN217036726U (en) | 2022-03-11 | 2022-03-11 | Combined prefabricated intermediate joint for high-voltage cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217036726U true CN217036726U (en) | 2022-07-22 |
Family
ID=82454162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220521313.1U Active CN217036726U (en) | 2022-03-11 | 2022-03-11 | Combined prefabricated intermediate joint for high-voltage cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217036726U (en) |
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2022
- 2022-03-11 CN CN202220521313.1U patent/CN217036726U/en active Active
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