CN214176872U - Device for solving overheating problem of connecting contact of cable terminal tower lead and copper bar - Google Patents
Device for solving overheating problem of connecting contact of cable terminal tower lead and copper bar Download PDFInfo
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- CN214176872U CN214176872U CN202022143850.0U CN202022143850U CN214176872U CN 214176872 U CN214176872 U CN 214176872U CN 202022143850 U CN202022143850 U CN 202022143850U CN 214176872 U CN214176872 U CN 214176872U
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- Prior art keywords
- copper
- terminal
- lead
- connecting pipe
- aluminum
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 51
- 239000010949 copper Substances 0.000 title claims abstract description 51
- 238000013021 overheating Methods 0.000 title claims abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 28
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000007704 transition Effects 0.000 claims abstract description 15
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 7
- 210000001503 joint Anatomy 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
- 239000004411 aluminium Substances 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
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Abstract
The invention discloses a device for solving the problem of overheating of a connecting contact of a lead wire and a copper bar of a cable terminal tower, which comprises: the lead connecting pipe (2) is formed by butt joint of a first L-shaped connecting pipe (201) and a second L-shaped connecting pipe (202) in a positive and negative mode through bolts; one end of the drainage wire (3) is connected with the second L-shaped connecting pipe (202), and the other end of the drainage wire (3) is connected with the copper-aluminum transition terminal (4). The invention utilizes the mode of increasing the drainage wire (3) and the copper-aluminum transition terminal (4) to replace the connection between the original L-shaped aluminum connecting pipe and the copper bar, thereby avoiding the connection of the contacts of copper and aluminum, and simultaneously increasing the connecting points of the lower lead of the overhead wire on the cable terminal tower and the copper bar, thereby reducing the frequency of overheating problems.
Description
Technical Field
The invention relates to the field of transmission cables, in particular to a device for solving the problem of overheating of a connecting contact of a cable terminal tower lead and a copper bar.
Background
In the urban development process, the power cable has the advantage of saving the ground space, and a large number of power transmission overhead lines are changed into power transmission cables. At present, with the large commissioning of power transmission cables, outdoor terminations on power transmission cable terminal towers are connected with overhead lines through lead terminals. Due to material and process problems, overheating at the connection joint of the lead terminal and the copper bar becomes one of the common defects threatening the safe operation of the transmission cable.
The transmission cable is connected with an overhead line through a copper bar and an L-shaped terminal, the overhead line and a lower lead are steel-cored aluminum stranded wires, and a lead terminal is a hardware fitting connected with a copper-aluminum conductor. The great still pure aluminum terminal that is of use volume at present, crimping L type aluminum terminal on the lead wire down, directly through screwed connection to the copper bar. Because the metal activity of aluminium is stronger than copper, copper bar and aluminium terminal contact surface can not reach the complete laminating, there is certain space, when moisture filling space, the copper aluminium contact surface forms the galvanic cell effect, the oxidation with higher speed, produce one deck oxide film at the contact surface, lead to contact resistance to increase and appear generating heat, simultaneously because the area coastal is even greatly, the salinity is heavier in the air, humidity is great, aluminium terminal under the outdoor conditions, the screw takes place the corrosion easily, lead to the overheated problem frequency appearance of joint department.
When the overheated defect appears, need apply for to have a power failure and carry out contact surface and polish, change handles such as screw, consuming time and power, can not fundamentally eliminate simultaneously because copper aluminium material contact leads to the overheated problem of contact, consequently the company's cable fortune of connecting greatly examines the room and through the principle research, proposes a device of solving cable terminal tower lead wire and copper bar connection contact overheated problem for reduce the number of times that the overheated condition appears in lead wire and copper bar connection contact department.
The most important and critical technical problems are as follows: the connection surface of two materials of copper and aluminum has a gap, because the oxidation can be accelerated by the galvanic effect, the contact resistance is obviously increased and the contact is overheated due to the appearance of an oxidation layer, for the safe and stable operation of the power grid, when the connection point of the lead terminal and the copper bar is overheated, the overheat point is processed by timely stopping power supply, the time and the labor are consumed, the cable maintenance cost is high, and the problem of copper and aluminum connection cannot be fundamentally solved.
Disclosure of Invention
Aiming at the problems, the invention provides a device for solving the problem of overheating of the connecting joint of the lead and the copper bar of the cable terminal tower, and the probability of overheating defects caused by oxidation of the connecting joint of the lead and the copper bar is reduced by changing different contact materials at the position of the joint.
In order to achieve the above object, the present invention provides a device for solving the problem of overheating of the connection contact between the lead wire and the copper bar of the cable termination tower, comprising: the lead connecting pipe is formed by a first L-shaped connecting pipe and a second L-shaped connecting pipe which are in positive and negative butt joint by utilizing a bolt; one end of the drainage wire is connected with the second L-shaped connecting pipe, and the other end of the drainage wire is connected with the copper-aluminum transition terminal. The copper-aluminum transition terminal comprises an aluminum terminal and a copper terminal, one end of the aluminum terminal is connected with the drainage wire, the other end of the aluminum terminal is fixedly connected with the copper terminal, and a bolt hole is formed in the copper terminal.
In a preferred mode, the copper terminal is fixedly connected with the copper bar through a bolt in a bolt hole.
Preferably, the first L-shaped connecting tube is an L-shaped circular tube for inserting a down-lead, and the second L-shaped connecting tube is an L-shaped circular tube for inserting a drainage wire.
Preferably, the first L-shaped connecting pipe is: a connecting plate is fixedly welded on the side surface of the round pipe along the direction vertical to the axis of the round pipe, and a bolt hole is formed in the connecting plate; the first L-shaped connecting pipe and the second L-shaped connecting pipe are the same in shape.
The invention has the beneficial effects that: the invention avoids the contact of copper and aluminum materials at the connecting point, greatly slows down the surface oxidation rate of the material, can increase the number of the connecting points of the down lead and the copper bar, increases the contact resistance when the contact surface of a certain connecting point is oxidized, and shunts current through other branches at the moment, thereby reducing the current of the oxidized part and reducing the times of overheating problems.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is a schematic view of the present invention in use in connection with a cable termination tower;
FIG. 3 is a schematic view of a structure of a drainage wire connected with a copper bar through a copper-aluminum transition terminal;
FIG. 4 is a side view of an aluminum L-shaped connecting tube;
FIG. 5 is a top view of an aluminum L-shaped connecting tube;
FIG. 6 is a front view of an aluminum L-shaped connecting tube;
fig. 7 is a side view of a lead connection tube;
fig. 8 is a top view of a lead connecting tube;
fig. 9 is a front view of the lead connection pipe.
Detailed Description
As shown in fig. 1, the device for solving the overheating problem of the connection contact between the lead wire and the copper bar of the cable terminal tower of the present invention comprises: the lead connecting pipe comprises a lead connecting pipe 2, a drainage wire 3 and a copper-aluminum transition terminal 4, wherein the lead connecting pipe 2 is formed by butt joint of a first L-shaped connecting pipe 201 and a second L-shaped connecting pipe 202 in a positive and negative mode through a bolt; one end of the drainage wire 3 is connected with the second L-shaped connecting pipe 202, and the other end of the drainage wire 3 is connected with the copper-aluminum transition terminal 4.
As shown in fig. 3, the copper-aluminum transition terminal 4 includes an aluminum terminal 401 and a copper terminal 402, one end of the aluminum terminal 401 is connected to the drainage wire 3, the other end of the aluminum terminal 401 is fixedly connected to the copper terminal 402, and the copper terminal 402 is provided with a bolt hole.
As shown in fig. 3, the copper terminal 402 is a terminal fixedly connected to the copper bar by a bolt in a bolt hole.
As shown in fig. 4 to 6, there are a front view, a side view and a top view of a first L-shaped connecting pipe 201 and a second L-shaped connecting pipe 202, respectively, where the first L-shaped connecting pipe 201 is: a connecting plate is fixedly welded on the side surface of the round pipe along the direction vertical to the axis of the round pipe, and a bolt hole is formed in the connecting plate; the first L-shaped connecting pipe 201 and the second L-shaped connecting pipe 202 have the same shape; as shown in fig. 7 to 9, there are a front view, a side view and a top view of the lead connecting tube 2, respectively.
Fig. 2 is a schematic diagram illustrating the connection of the present invention to a cable terminal tower, wherein 1: overhead down-lead, 2: lead connecting pipe, 3: and the same diameter of the lower lead, 4: copper-aluminum transition terminal, 5: copper bar, 6: lead fixing jig, 7: arrester, 8: support insulator, 9: cable termination, 10: pylon cross arm, 11: a cable body.
The specific use method of the invention is as follows: one end of the drainage wire 3 is inserted into one end of the second L-shaped connecting pipe 202 of the lead connecting pipe 2 and is tightly pressed and connected by a hydraulic device; connecting the other end of the drainage wire 3 with a copper-aluminum transition terminal 4, and tightly pressing by using a hydraulic device; searching a proper position on the lower lead 1 according to the length of the drainage wire 3, and tightly pressing the first aluminum L-shaped connecting pipe 201 on the lower lead 1 by using a hydraulic device; arranging the drainage wire 3, forming a hole in a proper position of the copper bar according to the same size on the premise of ensuring that the metal aluminum terminal 401 in the copper aluminum transition terminal 4 is not in contact with the copper bar according to the hole pitch of the bolt hole on the copper aluminum transition terminal 4, and connecting the copper aluminum transition terminal 4 with the copper bar by using a bolt; if two down-leads 1 appear, the device of the invention is additionally arranged on each down-lead 1 to ensure that the problem of overheating at the connecting joint of the cable terminal tower lead and the copper bar is better solved, and the connecting joints are connected by the same material in a mode of additionally arranging a drainage wire 3 on each down-lead 1, so that the situation that a galvanic cell is formed by connecting two materials of copper and aluminum in humid weather is avoided, the oxidation speed is effectively slowed down, and the number of times of overheating at the connecting joint of the cable terminal tower lead and the copper bar is reduced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (4)
1. The utility model provides a solve the overheated device of cable termination tower lead wire and copper bar connecting contact which characterized in that includes: the lead connecting pipe (2) is formed by butt joint of a first L-shaped connecting pipe (201) and a second L-shaped connecting pipe (202) in a positive and negative mode through bolts; one end of the drainage wire (3) is connected with the second L-shaped connecting pipe (202), and the other end of the drainage wire (3) is connected with the copper-aluminum transition terminal (4); the copper-aluminum transition terminal (4) comprises an aluminum terminal (401) and a copper terminal (402), one end of the aluminum terminal (401) is connected with the drainage wire (3), the other end of the aluminum terminal (401) is fixedly connected with the copper terminal (402), and a bolt hole is formed in the copper terminal (402).
2. The apparatus of claim 1, wherein said copper terminal (402) is a terminal fixedly connected to the copper bar by a bolt in a bolt hole.
3. The device for solving the problem of overheating of the lead-in and copper bar connection point of a cable termination tower according to claim 1, wherein the first L-shaped connection tube (201) is an L-shaped circular tube for inserting the down-lead, and the second L-shaped connection tube (202) is an L-shaped circular tube for inserting the drainage wire (3).
4. The device for solving the problem of overheating of the connection point of the lead and the copper busbar of a cable termination tower according to claim 1, wherein said first L-shaped connection tube (201) is: a connecting plate is fixedly welded on the side surface of the round pipe along the direction vertical to the axis of the round pipe, and a bolt hole is formed in the connecting plate; the first L-shaped connecting pipe (201) and the second L-shaped connecting pipe (202) are the same in shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022143850.0U CN214176872U (en) | 2020-09-25 | 2020-09-25 | Device for solving overheating problem of connecting contact of cable terminal tower lead and copper bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022143850.0U CN214176872U (en) | 2020-09-25 | 2020-09-25 | Device for solving overheating problem of connecting contact of cable terminal tower lead and copper bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214176872U true CN214176872U (en) | 2021-09-10 |
Family
ID=77596364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022143850.0U Active CN214176872U (en) | 2020-09-25 | 2020-09-25 | Device for solving overheating problem of connecting contact of cable terminal tower lead and copper bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214176872U (en) |
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2020
- 2020-09-25 CN CN202022143850.0U patent/CN214176872U/en active Active
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