CN221509090U - Device for cable under tension rod in power line - Google Patents
Device for cable under tension rod in power line Download PDFInfo
- Publication number
- CN221509090U CN221509090U CN202420122124.6U CN202420122124U CN221509090U CN 221509090 U CN221509090 U CN 221509090U CN 202420122124 U CN202420122124 U CN 202420122124U CN 221509090 U CN221509090 U CN 221509090U
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- cable
- cross arm
- phase
- bracket
- lightning arrester
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- 239000012212 insulator Substances 0.000 claims abstract description 60
- 239000004020 conductor Substances 0.000 claims description 18
- 230000002146 bilateral effect Effects 0.000 claims description 6
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 102100020786 Adenylosuccinate synthetase isozyme 2 Human genes 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000012211 strain insulator Substances 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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- Suspension Of Electric Lines Or Cables (AREA)
Abstract
The utility model discloses a device for a cable under a tension rod in a power line, which comprises a linear tower; a first jumper insulator arranged below the A-phase cross arm; a first bracket and a first post insulator arranged in the direction of the B-phase cross arm deviating from the overhead line, and a second jumper insulator arranged below the B-phase cross arm; a second bracket and a second post insulator arranged in the direction of the C-phase cross arm deviating from the overhead line, and a third post insulator arranged in the extending direction of the C-phase cross arm; the lightning arrester support and the cable terminal support are symmetrically arranged by taking the tower as a center, wherein the A-phase down lead is led to a cable terminal of the cable terminal support, which is far away from the overhead line side, the B-phase down lead is led to a cable terminal of the cable terminal support, which is on the cross arm extending side, and the C-phase down lead is led to a cable terminal of the cable terminal support, which is on the overhead line side. The cable is simple in down-leading mode, easy to realize, simple and reasonable in layout, safe and reliable and low in cost.
Description
Technical Field
The utility model relates to a device for a cable under a tension rod in a power line, which is used for changing the tension rod tower in the power line into a cable rod tower conveniently and economically.
Background
In the actual power engineering construction process, partial line transformation is often required to be performed on a running line, wherein a common problem is that the original line is continuously and normally operated while the original line is kept under a cable at the position of an original line linear tower, for example, under a 110kV three-phase overhead line.
In the prior art, a foundation cable terminal tower is newly erected at a proper position near an original tower to be reformed, and whether an original line is to be restored is determined according to requirements. The prior art can solve the technical problem of the transformation of the existing line, but the cost of newly constructing a foundation tower is relatively expensive, and how to reduce the transformation cost as much as possible becomes the problem that engineering personnel must consider.
Ideally, the existing towers are directly utilized to directly lower cables after being modified by simple technology, so that new towers are not needed to be added, and the cost is saved.
Disclosure of utility model
The utility model aims at providing a device for a tension-resistant cable under a pole in a power line, which directly utilizes the existing cable under a linear pole tower without adding a new cable pole tower.
Therefore, the utility model provides a device for a cable under a tension rod in a power line, which comprises a linear tower, a ground wire cross arm, an A-phase cross arm, a B-phase cross arm and a C-phase cross arm which are sequentially arranged downwards from the top of the linear tower, wherein two ends of each cross arm are respectively connected with a power transmission wire through a tension insulator string, and the device further comprises: a first jumper insulator suspended below the cross arm at the end part of the phase A cross arm; the device comprises a first bracket, a first post insulator and a second jumper insulator, wherein the first bracket is arranged at the end part of the B-phase cross arm in a direction away from an overhead line, the first post insulator is positioned at the tail end of the first bracket, and the second jumper insulator is suspended below the cross arm at the end part of the B-phase cross arm; a second bracket arranged at the end part of the C-phase cross arm and deviating from the direction of the overhead line, a second post insulator positioned at the tail end of the second bracket, and a third post insulator arranged at the end part of the C-phase cross arm and extending in the direction of the cross arm; the lightning arrester bracket takes a tower as a center and is of a bilateral symmetry structure, each side structure corresponds to a loop arrangement of a power line and comprises a first cake-shaped platform and three first connecting ends which are arranged at equal intervals on the periphery of the first cake-shaped platform, each first connecting end is provided with a lightning arrester which is vertically arranged relative to the first cake-shaped platform and a fourth post insulator which extends outwards along the radial direction of the first cake-shaped platform, and a first connecting end which is positioned at the middle position among the three first connecting ends is a reference position connecting end which is positioned under a C-phase cross arm when the lightning arrester bracket is assembled; the cable terminal supports are of bilateral symmetry structures and take the tower as the center, each side support comprises a second cake-shaped platform and three second connecting ends which are arranged at equal intervals on the periphery of the second cake-shaped platform, each second connecting end is provided with a cable terminal which is vertically arranged relative to the second cake-shaped platform, the second connecting end positioned in the middle position of the three second connecting ends is a reference position connecting end, and the second connecting end is positioned under the reference position connecting end of the lightning arrester support when the cable terminal support is installed; the phase A down conductor is electrically connected with a cable terminal on the cable terminal support, which is far away from the overhead line side, after being constrained by a first jumper insulator, a first post insulator, a second post insulator and a fourth post insulator on the lightning arrester support in sequence, and is led into the lightning arrester on the lightning arrester support, which is far away from the overhead line side, through a wire combining clamp; the phase B down lead is electrically connected with a cable terminal at the reference position on the cable terminal support after passing through the constraint of the second jumper insulator, the third post insulator and the fourth post insulator at the reference position on the lightning arrester support in sequence, and the down lead is led into the lightning arrester at the reference position on the lightning arrester support through another parallel groove wire clamp; the C-phase down-lead is electrically connected with an overhead line side cable terminal on the cable terminal bracket after being restrained by an overhead line side fourth post insulator on the lightning arrester bracket, and the down-lead is led into the lightning arrester on the overhead line side on the lightning arrester bracket through a parallel groove clamp.
Furthermore, the phase A, phase B and phase C down-lead are double split wires, and the end part of each pillar insulator is provided with a double soft bus fixing fitting for fixing the double split wires.
Further, the double split conductors are provided with a spacing rod every 2 meters.
Further, the tail end of the down lead is provided with a copper-aluminum transition equipment wire clamp, the copper-aluminum transition equipment wire clamp of each phase of wire is fixedly connected with the upper end of the cable terminal, and a cable aluminum alloy fixing fitting is arranged below the cable terminal and used for fixing the bound cable.
Further, the cable terminal support is arranged at a position, above 8 meters away from the ground, of the tower, and the lightning arrester support is arranged between the C-phase cross arm and the cable terminal support in a centered manner.
Further, the cable of each phase is led out of the ground by more than 2.5 meters through a C-PVC protection pipe, the protection pipe is connected with the rod body, and two ends of the protection pipe are tightly blocked by adopting cable plugging materials.
Further, the cable terminal is an oil-filled cable outdoor terminal.
Further, the ADSS cable and the return cable of each circuit share a protective tube upper rod.
Compared with the prior art, the utility model has the following technical effects:
(1) According to the utility model, 4 brackets, 6 post insulators, 1 lightning arrester platform (comprising 6 post insulators) and 1 cable head platform are added on the basis of the original linear tower, so that the cable down-connection work can be directly completed on the basis of the original linear tower, and the device is few, safe and reliable.
(2) The cable is simple in down-lead mode, easy to realize, simple and reasonable in layout, safe and reliable, and can be used as a mature typical device of a cable under a linear rod. Compared with a new special cable terminal rod, the cable terminal rod has low cost.
In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The present utility model will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 is a front view of an apparatus for tension-resisting under-rod cables in an electrical power line of the present utility model;
FIG. 2 is a side view of the apparatus of the tension sub cable in the power line of FIG. 1;
FIG. 3 is a schematic plan layout of the B-phase cross arm of the apparatus of the tension rod under cable in the power line of the present utility model;
FIG. 4 is a schematic plan layout of the C-phase cross arm of the apparatus of the tension rod under cable in the power line of the present utility model;
Fig. 5 is a schematic plan layout of a lightning arrester bracket in the apparatus of the tension sub-rod cable in the power line of the present utility model;
Fig. 6 is a schematic plan layout of a cable termination bracket in an apparatus for tension-lever-underscable in a power line of the present utility model.
Detailed Description
The utility model will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1 to 6 in combination, the present utility model provides a device for tension-resistant under-pole cables in an electrical power line, also referred to as a cable termination tower, for double loop overhead line down-take installation, comprising a linear tower and down-take device located in the original electrical power line.
The device comprises a pole tower 1, a ground wire cross arm, an A-phase cross arm, a B-phase cross arm and a C-phase cross arm which are sequentially arranged downwards from the top end of the pole tower 1, wherein two ends of each cross arm are connected with a power transmission wire 2 in a 110kV line through a strain insulator string 10, the power transmission wire 2 can be a steel-cored aluminum stranded wire, and the steel-cored aluminum stranded wire can also be a double-split wire.
The down-guiding device comprises down-guiding structures which are respectively additionally arranged on an A-phase cross arm, a B-phase cross arm and a C-phase cross arm, and a lightning arrester bracket 13 and a cable terminal bracket 16 which are sequentially arranged below the C-phase cross arm.
The cable termination brackets 16 are arranged at a position of the tower above 8 meters from the ground, and the lightning arrester brackets 13 are arranged centrally between the C-phase cross arm and the cable termination brackets. For example, the arrester support is 5 meters from the C-phase cross arm and also 5 meters from the cable termination support.
For convenience in describing the down-guiding manner of each loop overhead line, referring to fig. 3 and fig. 4, the orientation is specifically described: an overhead line side and an overhead line direction of the cross arm, a direction and a side deviating from the overhead line, a cross arm extending direction and a side extending from a terminal end of the cross arm along a length direction thereof, and a lower side of the cross arm.
A first jumper insulator 17 is suspended below the cross arm at the end of the A-phase cross arm.
A first bracket 23 and a first pillar insulator 24 positioned at the tail end of the first bracket 23 are arranged at the end part of the B-phase cross arm in the direction away from the overhead line, and a second jumper insulator 22 is suspended below the cross arm at the end part of the B-phase cross arm.
The second bracket 25 and the second pillar insulator 26 positioned at the tail end of the second bracket 25 are arranged at the end part of the C-phase cross arm in the direction away from the overhead line, and the third pillar insulator 27 is arranged at the end part of the C-phase cross arm in the extending direction of the cross arm.
The lightning arrester bracket 13 is a bilateral symmetry structure centering on the tower 1, each side structure corresponds to a loop arrangement of a power line, and comprises a first cake-shaped platform 13a and three first connecting ends 13 b', 13b and 13b″ which are arranged at equal intervals on the periphery of the first cake-shaped platform 13a, each first connecting end is provided with a lightning arrester 4 which is vertically arranged relative to the first cake-shaped platform and a fourth post insulator 3 which extends outwards along the radial direction of the first cake-shaped platform 13a, and the first connecting end 13b which is positioned at the middle position among the three first connecting ends is used as a reference position connecting end, and is positioned under the C-phase cross arm when the lightning arrester bracket 13 is assembled. One of the other two first connecting ends 13 b', 13b″ is on the side of the overhead line, the other is on the side facing away from the overhead line, and the included angles between the other two first connecting ends 13b and the reference position are 45 degrees. The arrester may be a vertical zinc oxide arrester.
The cable terminal support 16 is also a bilateral symmetry structure centering on the tower 1, each side structure comprises a second pie-shaped platform 16a and three second connecting ends 16b ', 16b and 16b″ which are arranged at equal intervals on the periphery of the second pie-shaped platform 16a, each second connecting end 16 b', 16b and 16b″ is provided with a cable terminal 5 which is vertically arranged relative to the second pie-shaped platform, the included angle of every two adjacent second connecting ends is 45 degrees, the second connecting end 16b which is positioned at the middle position among the three second connecting ends is used as a reference position connecting end, and the reference position connecting end of the cable terminal support is positioned right below the reference position connecting end of the lightning arrester support when the cable terminal support is installed. One of the other two second connecting ends is positioned at one side of the overhead line, the other is positioned at the side away from the overhead line, and the included angle between the other two second connecting ends and the second connecting end 16b at the reference position is 45 degrees.
Each post insulator is secured to a respective cross arm or bracket by a post insulator mount 11.
Each phase of cable 8 is led out of the ground by 2.5 meters through a C-PVC protection pipe 9, the protection pipe is connected with the rod body, and two ends of the protection pipe are tightly blocked by adopting cable blocking materials. Each phase of cable 8 is firstly lifted up along the tower pole under the support of the cable metal sheath, then deviates from the tower pole to the lower part of the cable terminal 5, is fixed by the cable aluminum alloy fixing hardware fitting 7, and is then electrically connected with the cable terminal connecting terminal 14. The tail end of each phase of single down lead or double split lead is connected with a copper-aluminum transition equipment wire clamp 15, one or more wire clamps 15 of each phase of down lead are fixedly connected with the upper end of a cable terminal 5, and the cable terminal is a 110kV oil-filled type cable outdoor terminal.
The cable metal sheath, the cable terminal base and the lightning arrester are all grounded, and the cable metal sheath, the cable terminal base and the lightning arrester share one grounding device with the steel pipe pole tower, and the power frequency grounding resistance is not more than 5 ohms.
The overhead line ground wire is insulated from the pole body, the safety distance between the wire and the pole tower is not less than 1500mm, and the safety distance between the electrified part on the terminal pole and the equipment platform is not less than 1700mm. The safety distance between different phases of the charged part of the equipment platform is not less than 1300mm. When the double split conductors are led down, 1 double split spacer 21 is arranged between the sub conductors every 2m, and the end part of the post insulator adopts a double soft bus fixing fitting 18, and the model of the post insulator can be MSG-5/120.
Each loop wiring on the lower cable straight line tower is as follows:
a grounding box 6 is arranged above the cable terminal support 16 of the tower 1, a grounding cable 19 is led out of the grounding box 6, and an ADSS cable 20 and a return cable of each loop are respectively put on the pole.
The down conductor (single steel-cored aluminum strand or double-split conductor) of the overhead line of the A phase is electrically connected with the cable terminal 5 on the cable terminal bracket, which is far away from the overhead line side, after being constrained by the first jumper insulator 17 (on the A phase cross arm), the first pillar insulator 24 (on the B phase cross arm), the second pillar insulator (on the C phase cross arm) 26 and the fourth pillar insulator 3 on the lightning arrester bracket 13 in sequence. The down conductor is also led to the lightning conductor 4 on the side facing away from the overhead line on the lightning conductor holder 13 via a bus bar clamp 12.
The down conductor (steel-cored aluminum strand) of the B-phase overhead line is electrically connected with the cable terminal 5 at the reference position on the cable terminal bracket after being constrained by the second jumper insulator 22 (on the B-phase cross arm), the third post insulator 27 (on the C-phase cross arm), and the fourth post insulator 3 at the reference position on the arrester bracket 13 in sequence. The down conductor is also led to the lightning arrester 4 in a reference position on the lightning arrester support 13 by means of a further parallel wire clamp 12.
The down conductor (steel-cored aluminum strand) of the C-phase overhead wire is electrically connected to the overhead-wire-side cable terminal 5 on the cable terminal bracket 16 after being restrained by the overhead-wire-side fourth post insulator 3 on the overhead-wire-side lightning arrester bracket 13. The down conductor is led to the overhead line-side lightning arrester 4 on the lightning arrester bracket 13 via a further parallel wire clip 12.
Compared with the prior art that the arrangement of the down wires of the towers is messy, the down wires of the three phases are distributed in three directions (the direction of the overhead wires, the direction deviating from the direction of the overhead wires and the extending direction of the overhead wires) at the tail ends of the cross arms, the down wires are firstly opened in the three directions (the opening range of the C-phase cross arms is the largest), and then the down wires are furled, wherein the lightning arrester support is furled for the first time, furled for the second time when reaching the cable terminal support, and finally furled into the protective tube surrounding the towers, so that the down wires keep enough distance with the towers and are mutually far away from each other in the down process.
The above embodiments of the present utility model are only examples, and are not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (8)
1. The utility model provides a device of cable under strain insulator pole in power line, includes the tangent tower, from the ground wire cross arm, A looks cross arm, B looks cross arm, the C looks cross arm that the tower top arranged in proper order downwards, and each cross arm both ends are respectively through strain insulator chain connection transmission wire, its characterized in that still includes:
A first jumper insulator suspended below the cross arm at the end part of the phase A cross arm;
the device comprises a first bracket, a first post insulator and a second jumper insulator, wherein the first bracket is arranged at the end part of the B-phase cross arm in a direction away from an overhead line, the first post insulator is positioned at the tail end of the first bracket, and the second jumper insulator is suspended below the cross arm at the end part of the B-phase cross arm;
A second bracket arranged at the end part of the C-phase cross arm and deviating from the direction of the overhead line, a second post insulator positioned at the tail end of the second bracket, and a third post insulator arranged at the end part of the C-phase cross arm and extending in the direction of the cross arm;
The lightning arrester bracket takes a tower as a center and is of a bilateral symmetry structure, each side structure corresponds to a loop arrangement of a power line and comprises a first cake-shaped platform and three first connecting ends which are arranged at equal intervals on the periphery of the first cake-shaped platform, each first connecting end is provided with a lightning arrester which is vertically arranged relative to the first cake-shaped platform and a fourth post insulator which extends outwards along the radial direction of the first cake-shaped platform, and a first connecting end which is positioned at the middle position among the three first connecting ends is a reference position connecting end which is positioned under a C-phase cross arm when the lightning arrester bracket is assembled; the cable terminal supports are of bilateral symmetry structures and take the tower as the center, each side support comprises a second cake-shaped platform and three second connecting ends which are arranged at equal intervals on the periphery of the second cake-shaped platform, each second connecting end is provided with a cable terminal which is vertically arranged relative to the second cake-shaped platform, the second connecting end positioned in the middle position of the three second connecting ends is a reference position connecting end, and the second connecting end is positioned under the reference position connecting end of the lightning arrester support when the cable terminal support is installed;
The phase A down conductor is electrically connected with a cable terminal on the cable terminal support, which is far away from the overhead line side, after being constrained by a first jumper insulator, a first post insulator, a second post insulator and a fourth post insulator on the lightning arrester support in sequence, and is led into the lightning arrester on the lightning arrester support, which is far away from the overhead line side, through a wire combining clamp;
The phase B down lead is electrically connected with a cable terminal at the reference position on the cable terminal support after passing through the constraint of the second jumper insulator, the third post insulator and the fourth post insulator at the reference position on the lightning arrester support in sequence, and the down lead is led into the lightning arrester at the reference position on the lightning arrester support through another parallel groove wire clamp; the C-phase down-lead is electrically connected with an overhead line side cable terminal on the cable terminal bracket after being restrained by an overhead line side fourth post insulator on the lightning arrester bracket, and the down-lead is led into the lightning arrester on the overhead line side on the lightning arrester bracket through a parallel groove clamp.
2. The device for tension-resistant under-rod cables in electric power lines according to claim 1, wherein the a-phase, B-phase and C-phase downleads are double split conductors, and a double soft bus fixing fitting is arranged at each end of each post insulator for fixing the double split conductors.
3. The apparatus of claim 2, wherein the double split conductor is provided with a spacer every 2 meters.
4. The device for the tension rod cable under the power line according to claim 1, wherein the tail end of the down conductor is provided with a copper-aluminum transition equipment wire clamp, the copper-aluminum transition equipment wire clamp of each phase of wires is fixedly connected with the upper end of a cable terminal, and a cable aluminum alloy fixing fitting is arranged below the cable terminal and used for fixing a binding cable.
5. The apparatus of claim 1, wherein the cable termination bracket is positioned 8 meters above the ground from the tower, and the arrester bracket is centrally disposed between the C-phase cross arm and the cable termination bracket.
6. The device for the cable under the tension rod in the power line according to claim 1, wherein each phase of cable is led out of the ground by more than 2.5 meters by using a C-PVC protection tube, the protection tube is connected with the rod body, and two ends of the protection tube are tightly plugged by adopting cable plugging materials.
7. The apparatus of claim 1, wherein the cable termination is an oil filled cable outdoor termination.
8. The apparatus of claim 1, wherein the ADSS cable and the return cable of each circuit share a common protective tube upper pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420122124.6U CN221509090U (en) | 2024-01-17 | 2024-01-17 | Device for cable under tension rod in power line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420122124.6U CN221509090U (en) | 2024-01-17 | 2024-01-17 | Device for cable under tension rod in power line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221509090U true CN221509090U (en) | 2024-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420122124.6U Active CN221509090U (en) | 2024-01-17 | 2024-01-17 | Device for cable under tension rod in power line |
Country Status (1)
| Country | Link |
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| CN (1) | CN221509090U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119965768A (en) * | 2025-02-18 | 2025-05-09 | 中国能源建设集团江苏省电力设计院有限公司 | A double-circuit tower overhead line converted into a double-spliced cable downlead structure |
| CN119965768B (en) * | 2025-02-18 | 2026-08-14 | 中国能源建设集团江苏省电力设计院有限公司 | A double-circuit tower overhead line converted into a double-section cable downlead structure |
-
2024
- 2024-01-17 CN CN202420122124.6U patent/CN221509090U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119965768A (en) * | 2025-02-18 | 2025-05-09 | 中国能源建设集团江苏省电力设计院有限公司 | A double-circuit tower overhead line converted into a double-spliced cable downlead structure |
| CN119965768B (en) * | 2025-02-18 | 2026-08-14 | 中国能源建设集团江苏省电力设计院有限公司 | A double-circuit tower overhead line converted into a double-section cable downlead structure |
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