CN209942341U - Three-way cross arm steel pipe pole for double-circuit overhead line breaking - Google Patents
Three-way cross arm steel pipe pole for double-circuit overhead line breaking Download PDFInfo
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- CN209942341U CN209942341U CN201920422633.XU CN201920422633U CN209942341U CN 209942341 U CN209942341 U CN 209942341U CN 201920422633 U CN201920422633 U CN 201920422633U CN 209942341 U CN209942341 U CN 209942341U
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- cross arm
- steel pipe
- hanging plate
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 33
- 239000010959 steel Substances 0.000 title claims abstract description 33
- 238000012423 maintenance Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 10
- 238000009434 installation Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000004020 conductor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 241000282326 Felis catus Species 0.000 description 1
- 230000009193 crawling Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model relates to a line structure of a double-loop overhead line when being cut off, in particular to a three-way cross arm steel pipe rod for the double-loop overhead line when being cut off, which has the structural key points that the steel pipe rod comprises a main rod, a G1 cross arm connected with a non-cut-off wire, a G2 cross arm and a G3 cross arm which are respectively connected with the two ends of the cut-off wire and have equal length; one end of each of the three groups of cross arms is connected with the main rod through a flange, and the G1 cross arm is arranged perpendicular to the non-break lead; in an isosceles triangle formed by using the G2 cross arm and the G3 cross arm as waist lines, the height on the bottom side is as long as that of the G1 cross arm; the end part of each group of cross arms is provided with a wire hanging plate and a jumper wire hanging plate, the wire hanging plate is connected with a wire led from the original tower, and the jumper wire hanging plate is connected with a wire led from a new tower; the main rod is positioned between the original towers on the two sides of the cut-off line, and the top of the main rod is provided with a ground wire support. Has the advantages that: the towers on the original old lines are not required to be dismantled, so that the engineering quantity and the construction cost are greatly reduced, and the line corridor area is greatly reduced; meanwhile, the installation is convenient and flexible, and the selection of various tower positions can be matched.
Description
Technical Field
The utility model relates to a two return circuit's overhead line circuit structure when breaking, especially a two return overhead line is broken and is used three-dimensional cross arm steel-pipe pole.
Background
In the prior art, a new tower is introduced into a double-circuit overhead line after being disconnected, as shown in fig. 1, towers on two sides of a line disconnection position are respectively an original tower a and an original tower B, and after a line is disconnected and returned to II, as shown in fig. 2, a new tower C is added, at the moment, the tension direction of a conductor of the original tower a/B needs to be changed so as to connect the conductor to the new tower C, however, because the bending radius of the conductor is limited, the conductor on the original tower A, B cannot be directly hooked to the direction of the new tower C, and the structure on the original tower A, B cannot be additionally changed, so that the existing double-circuit overhead line disconnection scheme is as follows: dismantling the original tower A, B, and constructing a new tower D to replace the original tower A, and a new tower E to replace the original tower B; the cross arm of the new tower D, E needs to be modified by deflection to accommodate the wire transition in the direction of the new tower C. The new tower D, E is now connected straight to the new tower C wire, thus new tower D, E and new tower C form a triangular footprint under the connection of the two straight wires. The defects of the prior art are as follows:
1. the original line needs to be modified, two basic iron towers at the front side and the rear side of the disconnected gear are dismantled, and a two basic tension tower is newly built, so that the engineering quantity is large, the construction cost is high, and the construction period is long;
2. after an original iron tower is dismantled, a new tower position needs to be searched again, and the search of meeting the design conditions is complicated by using a newly-built two-base tower, but under the condition of shortage of suburban land, the search of the new tower position before and after the original tower position is difficult;
3. after the line is disconnected, three new towers form a triangular distribution, which results in the increase of line corridors, possibly increases cross spanning, has high difficulty in erecting wires, and also results in the increase of ground acquisition cost and claims difficulty of tower foundations.
Disclosure of Invention
An object of the utility model is to provide a two return overhead lines that can effectively reduce engineering volume and construction cost, shorten construction period, construction convenience, reduce tower footing land investigation expense and blue or green claims the degree of difficulty use three-dimensional cross arm steel-pipe pole according to prior art's weak point.
The purpose of the utility model is realized through the following ways:
the three-way cross arm steel pipe pole for the on-off of the double-circuit overhead line is structurally characterized by comprising a main pole, a G1 cross arm connected with a non-on-off conducting wire, and a G2 cross arm and a G3 cross arm which are respectively connected with two ends of the on-off conducting wire and are equal in length; one end of each of the three groups of cross arms is connected with the main rod through a flange, and the G1 cross arm is arranged perpendicular to the non-break lead; in an isosceles triangle formed by using the G2 cross arm and the G3 cross arm as waist lines, the height on the bottom side is as long as that of the G1 cross arm; the end part of each group of cross arms is provided with a wire hanging plate and a jumper wire hanging plate which are connected with each other, the wire hanging plate and the jumper wire hanging plate are respectively positioned on the upper end surface and the lower end surface of the end part of each cross arm, the wire hanging plate is connected with a wire led from an original tower, and the jumper wire hanging plate is connected with a wire led from a new tower; the main rod is positioned between the original towers on the two sides of the cut-off line, and the top of the main rod is provided with a ground wire support.
In this way, in distribution, two original towers are connected with a new tower through three-way cross arm steel pipe poles, among three groups of cross arms of the three-way cross arm steel pipe poles, a G1 cross arm can be connected with a non-break lead, and G2 and G3 cross arms are respectively connected with two ends of a break part of the break lead. Therefore, the utility model discloses following technological effect has:
1) because the tension direction of the lead on the original tower does not need to be changed, namely the stress state of the original tower does not need to be changed, the tower on the original old line does not need to be dismantled, thereby avoiding various problems brought by newly-built iron towers, reducing the engineering quantity and the construction cost and shortening the construction period;
2) because the main rod and the new tower are linearly distributed and have the designed minimum floor area, the area of a line corridor is greatly reduced, and the land acquisition cost and the blue and green claim difficulty of the tower foundation are effectively reduced.
3) The three-way cross arm steel pipe pole can be flexibly arranged at any position of the opening and closing gear according to site topography and environmental conditions, so that various tower positions of a new tower can be selected in a matched mode, and the three-way cross arm steel pipe pole is more flexible.
The utility model discloses can further specifically do:
the cross section of the main rod is circular, the main rod is formed by connecting a plurality of sections of steel pipe rods in sequence, and two adjacent sections of steel pipe rods are connected through a circular flange.
Considering that the length of the main rod exceeds 9 meters, the segmental manufacture can avoid the problems of stress concentration and the like. And the convenience and the practical effect of the main rod in the aspects of prefabrication, transportation and the like can be realized through sectional manufacturing and assembling.
The three groups of cross arms are all made of square steel pipes and are connected with the main rod through a square flange.
The square steel pipe is helpful for installing the wire hanging plate, the jumper wire hanging plate and related auxiliary devices.
The ladder stand is characterized by further comprising an overhauling ladder stand which is arranged on two sides of the G1 cross arm on the main rod.
Still including overhauing the guardrail, all install the maintenance guardrail on every cross arm of every group cross arm.
The overhaul crawling ladder and the overhaul guardrail are convenient for overhaul personnel to go to any position of the cross arm to overhaul and maintain the line.
The two ends of the wire hanging plate are of an upward or downward sloping plate structure.
The inclined plate structure is characterized in that the wire hanging plate is selected to be downward or upward fired according to the actual engineering situation, so that the bending direction of the wire hanging plate is consistent with the stress direction, and the stress concentration is prevented from appearing.
To sum up, the utility model provides a three-dimensional cross arm steel pipe pole based on two times overhead line is disconnected usefulness, through set up three-dimensional cross arm steel pipe pole on the disconnected circuit to connect the wire that draws from former tower and the wire that leads to the new tower, and do not change original old tower and circuit trend, need not to demolish the shaft tower on the former circuit, greatly reduced engineering volume and construction cost, shortened construction period, reduced circuit corridor area by a wide margin, effectively reduced column foot expropriation ground expense and blue or green claim degree of difficulty; meanwhile, the installation is convenient and flexible, and the selection of various tower positions can be matched.
Drawings
Fig. 1 is a schematic structural diagram of a double-circuit overhead line in the background art of the present invention before being disconnected.
Fig. 2 is a schematic structural diagram of a double-circuit overhead line according to the background art of the present invention after being disconnected.
Fig. 3 is the utility model discloses a two return overhead line break-make structure schematic diagrams based on three-dimensional cross arm steel-pipe pole.
Fig. 4 is the schematic structural diagram of three-way cross arm steel pipe pole for the on-off of double-circuit overhead line.
Fig. 5 is the cross-sectional structure schematic diagram of cross arm department of three-way cross arm steel-pipe pole for two-circuit overhead line opens and shuts.
Fig. 6 is a view of the end of the cross arm in fig. 4 in the direction of a, and fig. 7 is a structural diagram of the ground wire bracket in the direction of B-B in fig. 4.
The present invention will be further described with reference to the following examples.
Detailed Description
The best embodiment is as follows:
referring to fig. 3 and fig. 4, in this embodiment, based on the design background of disconnecting the loop II and connecting the new tower C in the double-loop overhead line, the loop I is not disconnected, and if there is a disconnected part in the loop I, the non-disconnected conductor in this text refers to the non-disconnected conductor in the loop I. The vertical distance between the I-loop line and the II-loop line is L1. The three-way cross arm steel pipe pole for the on-off of the double-circuit overhead line comprises a main pole 5, a G1 cross arm connected with a non-on-off lead, and a G2 cross arm and a G3 cross arm which are respectively connected with two ends of the on-off lead and have equal length; one end of each of the three groups of cross arms is connected with the main rod through a flange; the G1 cross arm is arranged perpendicular to the trend of the I return circuit; in an isosceles triangle formed by taking the cross arm G2 and the cross arm G3 as waistlines, the height of the bottom side (the dotted connection line of the end points of the cross arm G2 and the cross arm G3, the length is L2) is as long as that of the cross arm G1, and the height of the bottom side is in the same straight line with that of the cross arm G1.
As shown in fig. 4 and 7, the section of the main rod 5 is circular, the main rod is formed by sequentially connecting a plurality of sections of steel pipe rods, and two adjacent sections of steel pipe rods are connected through a circular flange 11; the main rod 5 is positioned between the original towers at the two sides of the cut-off line, and the top of the main rod is provided with the ground wire support 4. Referring to fig. 5, the main pole 5 is provided with access ladders 7 on both sides of the G1 cross arm. The three groups of cross arms are all made of square steel pipes and are connected with the main rod 5 through a square flange 6, and each cross arm of each group of cross arms is provided with an overhaul guardrail 8.
Referring to fig. 6, each cross arm end of each group of cross arms is provided with a wire hanging plate 9 and a jumper hanging plate 10, the wire hanging plate 9 and the jumper hanging plate 10 are respectively positioned on the upper end surface and the lower end surface of the cross arm end, the wire hanging plate 9 is connected with a wire led from an original tower, and the jumper hanging plate 10 is connected with a wire led from a new tower.
The various components of the implementation are further described below:
1) the three-way steel pipe pole is arranged at the center of the wires at two sides of the old line open-break gear to ensure that the turn angle degree of the original line is not changed after the line is erected, wherein the length of a G1 cross arm is D1, the lengths of a G2 cross arm and a G3 cross arm are D2 and D3 respectively, and the following relations are met:
D1=L1/2； D22=D32=( L1/2)2+( L2/2)2；
after the geometrical relation is satisfied, the tension directions of the wires of the original tower A and the original tower B can be ensured not to be changed, and the stress state of the original tower is not changed, so that the original iron tower does not need to be replaced.
2) The main rod 5 is made of steel pipes, and the included angle between the three-way cross arms can be randomly arranged according to needs, so that the limitation that the included angle of the cross arms is 90 degrees and the quadrilateral section of the angle steel tower is solved;
3) the end part of the cross arm is provided with a wire hanging hole (on the wire hanging plate) and a wire jumper hanging hole (on the wire jumper hanging plate), and the size and the distance of the holes correspond to the size and the distance of bolts of the wire insulator string, so that the wire can be smoothly hung on the cross arm.
4) The wire hanging plate is fired downwards or upwards according to the actual engineering situation, so that the bending direction of the wire hanging plate is consistent with the stress direction, stress concentration is prevented from appearing, and the fire curve shown in the attached figure 6 is referred to;
5) the maintenance cat ladder is installed in the left and right sides, sets up the maintenance guardrail on the cross arm to make the maintainer can go up to any position on the cross arm smoothly and carry out the circuit maintenance.
6) Referring to fig. 7, the ground wire holder 4 is provided with ground wire hanging holes in four directions, front, rear, left, and right, so that the ground wire can be installed in any one direction when the line has different cut-off angles. The center of the ground wire support 4 is provided with a drainage hole communicated with the main rod 5, so that when the circuit has an overvoltage fault, the current can be connected with the main rod 5 through the drainage hole, and then the main rod 5 is connected with a ground grounding grid of the steel pipe rod through a bottom grounding hole.
7) The length of the main rod 5 exceeds 9 meters, the main rod needs to be manufactured in sections and assembled in sections, and each section is connected through a bolt circular flange.
The part of the utility model which is not described is the same as the prior art.
Claims (6)
1. The three-way cross arm steel pipe pole for the on-off of the double-circuit overhead line is characterized by comprising a main pole, a G1 cross arm connected with a non-on-off lead, and a G2 cross arm and a G3 cross arm which are respectively connected with two ends of the on-off lead and have equal length; one end of each of the three groups of cross arms is connected with the main rod through a flange, and the G1 cross arm is arranged perpendicular to the non-break lead; in an isosceles triangle formed by using the G2 cross arm and the G3 cross arm as waist lines, the height on the bottom side is as long as that of the G1 cross arm; the end part of each group of cross arms is provided with a wire hanging plate and a jumper wire hanging plate which are connected with each other, the wire hanging plate and the jumper wire hanging plate are respectively positioned on the upper end surface and the lower end surface of the end part of each cross arm, the wire hanging plate is connected with a wire led from an original tower, and the jumper wire hanging plate is connected with a wire led from a new tower; the main rod is positioned between the original towers on the two sides of the cut-off line, and the top of the main rod is provided with a ground wire support.
2. The three-way cross arm steel pipe pole for the on-off of the double-circuit overhead line according to claim 1, wherein the section of the main pole is circular, the main pole is formed by sequentially connecting a plurality of sections of steel pipe poles, and two adjacent sections of steel pipe poles are connected through a circular flange.
3. The three-way cross arm steel pipe pole for the on-off of the double-circuit overhead line according to claim 1, wherein the three groups of cross arms are all made of square steel pipes and are connected with the main pole through a square flange.
4. The three-way cross arm steel pipe pole for the disconnection of the double-circuit overhead line according to claim 1, further comprising a maintenance ladder which is installed on two sides of the G1 cross arm on the main pole.
5. The three-way cross arm steel pipe pole for the on-off of the double-circuit overhead line according to claim 1, further comprising an overhaul guardrail, wherein each cross arm of each group of cross arms is provided with the overhaul guardrail.
6. The three-way cross arm steel pipe pole for the disconnection of a double-circuit overhead line according to claim 1, wherein two ends of the wire hanging plate are of an upward or downward sloping plate structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920422633.XU CN209942341U (en) | 2019-03-31 | 2019-03-31 | Three-way cross arm steel pipe pole for double-circuit overhead line breaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920422633.XU CN209942341U (en) | 2019-03-31 | 2019-03-31 | Three-way cross arm steel pipe pole for double-circuit overhead line breaking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209942341U true CN209942341U (en) | 2020-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920422633.XU Withdrawn - After Issue CN209942341U (en) | 2019-03-31 | 2019-03-31 | Three-way cross arm steel pipe pole for double-circuit overhead line breaking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209942341U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109914897A (en) * | 2019-03-31 | 2019-06-21 | 中国电建集团福建省电力勘测设计院有限公司 | Double back overhead transmission line is cut-off with three-dimensional cross-arm steel pipe pole |
-
2019
- 2019-03-31 CN CN201920422633.XU patent/CN209942341U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109914897A (en) * | 2019-03-31 | 2019-06-21 | 中国电建集团福建省电力勘测设计院有限公司 | Double back overhead transmission line is cut-off with three-dimensional cross-arm steel pipe pole |
| CN109914897B (en) * | 2019-03-31 | 2024-02-23 | 中国电建集团福建省电力勘测设计院有限公司 | Three-way cross arm steel pipe pole for cutting off double-circuit overhead line |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200114 Effective date of abandoning: 20240223 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200114 Effective date of abandoning: 20240223 |