CN109914897B - Three-way cross arm steel pipe pole for cutting off double-circuit overhead line - Google Patents
Three-way cross arm steel pipe pole for cutting off double-circuit overhead line Download PDFInfo
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- CN109914897B CN109914897B CN201910254549.6A CN201910254549A CN109914897B CN 109914897 B CN109914897 B CN 109914897B CN 201910254549 A CN201910254549 A CN 201910254549A CN 109914897 B CN109914897 B CN 109914897B
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- cross arm
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- breaking
- double
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 35
- 239000010959 steel Substances 0.000 title claims abstract description 35
- 238000005520 cutting process Methods 0.000 title claims description 6
- 238000010276 construction Methods 0.000 abstract description 10
- 238000009434 installation Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 241000282326 Felis catus Species 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012212 insulator Substances 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
Abstract
The invention relates to a line structure of a double-loop overhead line during breaking, in particular to a three-way cross arm steel pipe rod for breaking the double-loop overhead line, which is structurally characterized by comprising a main rod, a G1 cross arm connected with a non-breaking wire, and a G2 cross arm and a G3 cross arm which are respectively connected with two ends of the breaking wire and have equal lengths; 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 perpendicular to the non-broken wire; in an isosceles triangle formed by taking the G2 cross arm and the G3 cross arm as waist lines, the height on the bottom edge is equal to 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 hanging plate, the wire hanging plate is connected with a wire led from the original tower, and the jumper hanging plate is connected with a wire led from the new tower; the main rod is positioned between the original towers at the two sides of the open circuit, and the top of the main rod is provided with a ground wire bracket. The advantages are that: the pole tower on the original line is not required to be dismantled, so that the engineering quantity and the construction cost are greatly reduced, and the area of a line corridor is greatly reduced; meanwhile, the installation is convenient and flexible, and the selection of various tower positions can be matched.
Description
Technical Field
The invention relates to a line structure of a double-loop overhead line during breaking, in particular to a three-way cross arm steel pipe rod for breaking the double-loop overhead line.
Background
In the prior art, after the double-loop overhead line is broken, a new tower is introduced, as shown in fig. 1, which is a tower on two sides of a broken part of the line, namely an original tower a and an original tower B, after the double-loop overhead line is broken, as shown in fig. 2, a new tower C is added, and at this time, the tension direction of wires of the original tower a/B needs to be changed to connect the wires to the new tower C, however, due to the limitation of the bending radius of the wires, the wires on the original tower A, B cannot be directly hung to the new tower C, and the structure on the original tower A, B cannot be additionally changed, so that the breaking scheme of the existing double-loop overhead line is as follows: removing 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 deflected and modified to accommodate the transfer of the wire to the new tower C. The wires from the new tower D, E to the new tower C are now in a straight line connection, whereby the new tower D, E and the new tower C form a triangular footprint with the connection of the two straight wires. The above prior art has the disadvantages that:
1. the original line is required to be modified, two-base iron towers at the front side and the rear side of the broken gear are removed, two-base tension towers are newly built, the engineering quantity is large, the construction cost is high, and the construction period is long;
2. new tower positions are required to be found again after the original iron towers are removed, so that the newly-built two-foundation towers are required to meet design conditions, the finding is complicated, and under the condition that suburb land is short, the finding of new tower positions before and after the original tower positions is difficult;
3. after the line is disconnected, three new towers form a triangle distribution, so that the line corridor is increased, the crossing span is possibly increased, the difficulty in erecting wires is high, and the cost of the tower foundation and the difficulty in green claims are also increased.
Disclosure of Invention
The invention aims to provide the three-way cross arm steel pipe rod for cutting the double-loop overhead line, which can effectively reduce the engineering quantity and the construction cost, shorten the construction period, facilitate the construction and reduce the cost of the tower foundation and the green and dead claim difficulty according to the defects of the prior art.
The aim of the invention is achieved by the following ways:
the three-way cross arm steel pipe rod for the breaking of the double-circuit overhead line is structurally characterized by comprising a main rod, a G1 cross arm connected with a non-breaking wire, and a G2 cross arm and a G3 cross arm which are respectively connected with two ends of the breaking wire and have equal lengths; 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 perpendicular to the non-broken wire; in an isosceles triangle formed by taking the G2 cross arm and the G3 cross arm as waist lines, the height on the bottom edge is equal to that of the G1 cross arm; the end parts of each group of cross arms are respectively provided with a wire hanging plate and a jumper hanging plate which are connected with each other, the wire hanging plates and the jumper hanging plates are respectively positioned on the upper end face and the lower end face of the end parts of the cross arms, the wire hanging plates are connected with wires led from the original tower, and the jumper hanging plates are connected with wires led from the new tower; the main rod is positioned between the original towers at the two sides of the open circuit, and the top of the main rod is provided with a ground wire bracket.
Like this, on the distribution, two former towers are connected with new tower through three-way cross arm steel pipe pole, three group's cross arms of three-way cross arm steel pipe pole in, G1 cross arm can connect the non-wire that breaks, G2 and G3 cross arm then connect the both ends of wire department of breaking respectively. Therefore, the invention has the following technical effects:
1) Because the tension direction of the wires on the original tower is not required to be changed, namely the stress state of the original tower is not required to be changed, the towers on the original line are not required to be dismantled, thereby avoiding various problems caused by newly-built 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 are the minimum occupation area which can be designed, the area of a line corridor is greatly reduced, and the land-marking cost and the green and odds difficulty of the tower are effectively reduced.
3) The three-way cross arm steel pipe rod can be flexibly arranged at any position of the open/close gear according to the site topography and environmental conditions, so that the three-way cross arm steel pipe rod can be matched with various tower positions of a new tower to select, and has more flexibility.
The invention may further be embodied as:
the section of the main rod 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.
Considering that the length of the main rod exceeds 9 meters, the problem of stress concentration and the like can be avoided in the sectional manufacturing. And the convenience and practical effects of the main rod in prefabrication, transportation and the like can be realized through sectional manufacturing and assembly.
The three groups of cross arms are all made of square steel pipes and are connected with the main rod through square flanges.
The square steel tube is helpful for installing the wire hanging plate, the jumper hanging plate and related auxiliary settings.
The maintenance cat ladder is arranged on two sides of the G1 cross arm on the main rod.
The maintenance guardrail is arranged on each cross arm of each group of cross arms.
The maintenance cat ladder and the maintenance guardrail are convenient for maintenance staff to go to any position of the cross arm for line maintenance.
The two ends of the wire hanging plate are provided with upward or downward sloping plate structures.
The inclined plate structure is characterized in that the wire hanging plate is selected to be bent downwards or upwards according to the actual conditions of engineering, so that the bending direction of the wire hanging plate is consistent with the stress direction, and the occurrence of stress concentration is avoided.
In summary, the three-way cross arm steel pipe rod for breaking the double-loop overhead line is provided, and is arranged on the breaking line to connect the lead from the original tower and the lead to the new tower, so that the trend of the original old tower and the line is not changed, the pole tower on the original old line is not required to be dismantled, the engineering quantity and the construction cost are greatly reduced, the construction period is shortened, the area of a line corridor is greatly reduced, and the land cost and the green and odds difficulty of the tower are effectively reduced; 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 dual-loop overhead line before disconnection according to the background art of the invention.
Fig. 2 is a schematic structural diagram of a broken double-loop overhead line according to the background art of the present invention.
Fig. 3 is a schematic diagram of a broken structure of a double-circuit overhead line based on a three-way cross arm steel pipe pole.
Fig. 4 is a schematic structural diagram of a three-way cross arm steel pipe pole for cutting a double-loop overhead line according to the present invention.
Fig. 5 is a schematic cross-sectional structure of a cross arm of the three-way cross arm steel pipe pole for cutting a double-loop overhead line.
Fig. 6 is an a-direction view of the end of the cross arm in fig. 4, and fig. 7 is a B-direction structure schematic view of the ground wire bracket in fig. 4.
The invention is further described below with reference to examples.
Detailed Description
Best mode for carrying out the invention:
referring to fig. 3 and fig. 4, in the present embodiment, based on the design background that in the double-loop overhead line, the loop II is broken and the new tower C is connected, the loop I is not broken, and if the loop I also has a break, the non-break conductor in this context refers to the non-break conductor in the loop I. The vertical distance between the loop I and loop II is L1. The three-way cross arm steel pipe rod for the breaking of the double-circuit overhead line comprises a main rod 5, a G1 cross arm connected with a non-breaking wire, and a G2 cross arm and a G3 cross arm which are respectively connected with two ends of the breaking wire and have equal lengths; one end of each of the three groups of cross arms is connected with the main rod through a flange; wherein the G1 cross arm is arranged perpendicular to the trend of the I loop line; in an isosceles triangle formed by taking a G2 cross arm and a G3 cross arm as waist lines, the height on the bottom edge (the virtual connecting line of the end points of the G2 cross arm and the G3 cross arm is L2) is equal to that of the G1 cross arm, and the height on the bottom edge is in the same straight line with the G1 cross arm.
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 open circuit, and the top of the main rod is provided with a ground wire bracket 4. Referring to fig. 5, an overhaul ladder 7 is installed at both sides of the G1 cross arm on the main pole 5. The three groups of cross arms are made of square steel pipes and are connected with the main rod 5 through square flanges 6, and each cross arm of each group of cross arms is provided with an overhaul guardrail 8.
Referring to fig. 6, a wire hanging plate 9 and a jumper hanging plate 10 are mounted at each cross arm end of each group of cross arms, the wire hanging plate 9 and the jumper hanging plate 10 are respectively positioned at the upper end face and the lower end face of each 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 centers of wires at two sides of an opening gear of an old line so as to ensure that the rotation 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 relation is satisfied:
D1=L1/2；D2 2 =D3 2 =( L1/2) 2 +( L2/2) 2 ；
after the geometric relationship is met, the tension direction of the wires of the original tower A and the original tower B is not changed, and the stress state of the original tower is not changed, so that the original iron tower is not required to be replaced.
2) The main rod 5 is made of steel pipes, and the included angles between the three-way cross arms can be arranged randomly according to the needs, so that the limitation that the included angles of the cross arms are 90 degrees due to the quadrangular section of the angle steel tower is solved;
3) The end of the cross arm is provided with a wire hanging hole (on the wire hanging plate) and a jumper wire hanging hole (on the jumper wire hanging plate), and the size and the interval of the holes are corresponding to the size and the interval of the bolts of the wire insulator string, so that the wire can be smoothly hung on the cross arm.
4) The wire hanging plate is selected to be curved 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, the occurrence of stress concentration is avoided, and the wire hanging plate is seen from the fire curve shown in fig. 6;
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 to any position on the cross arm smoothly and carry out the circuit maintenance.
6) Referring to fig. 7, the ground wire bracket 4 is provided with ground wire hanging holes in four directions, namely front, back, left and right, so that the ground wire can be installed in any direction when the line has different breaking angles. The center of the ground wire support 4 is provided with a drainage hole communicated with the main rod 5, so that when an overvoltage fault occurs on a circuit, current can be connected with the main rod 5 through the drainage hole, and then the main rod 5 is connected with a steel pipe rod grounding grid through a bottom grounding hole.
7) The length of the main rod 5 exceeds 9 meters, the main rod is manufactured in a segmented mode, the main rod is assembled in a segmented mode, and each segment is connected with each other through a bolt round flange.
The invention is not described in part as in the prior art.
Claims (6)
1. The three-way cross arm steel pipe rod for the breaking of the double-circuit overhead line is characterized by comprising a main rod, a G1 cross arm connected with a non-breaking wire, and a G2 cross arm and a G3 cross arm which are respectively connected with two ends of the breaking wire and have equal lengths; 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 perpendicular to the non-broken wire; in an isosceles triangle formed by taking the G2 cross arm and the G3 cross arm as waist lines, the height on the bottom edge is equal to that of the G1 cross arm; the end parts of each group of cross arms are respectively provided with a wire hanging plate and a jumper hanging plate which are connected with each other, the wire hanging plates and the jumper hanging plates are respectively positioned on the upper end face and the lower end face of the end parts of the cross arms, the wire hanging plates are connected with wires led from the original tower, and the jumper hanging plates are connected with wires led from the new tower; the main rod is positioned between the original towers at the two sides of the open circuit, and the top of the main rod is provided with a ground wire bracket.
2. The three-way cross arm steel pipe pole for cutting off a double-loop overhead line according to claim 1, wherein the cross 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 rod for breaking the double-loop 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 rod through square flanges.
4. The three-way cross arm steel pipe pole for breaking double-loop overhead line according to claim 1, further comprising an overhaul ladder mounted on both sides of the G1 cross arm on the main pole.
5. The three-way cross arm steel pipe pole for breaking double-loop overhead line according to claim 1, further comprising an overhaul guardrail, wherein each cross arm of each group of cross arms is provided with an overhaul guardrail.
6. The three-way cross arm steel pipe pole for breaking double-loop overhead line according to claim 1, wherein both ends of the wire hanging plate are upward or downward inclined plate structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910254549.6A CN109914897B (en) | 2019-03-31 | 2019-03-31 | Three-way cross arm steel pipe pole for cutting off double-circuit overhead line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910254549.6A CN109914897B (en) | 2019-03-31 | 2019-03-31 | Three-way cross arm steel pipe pole for cutting off double-circuit overhead line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109914897A CN109914897A (en) | 2019-06-21 |
| CN109914897B true CN109914897B (en) | 2024-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910254549.6A Active CN109914897B (en) | 2019-03-31 | 2019-03-31 | Three-way cross arm steel pipe pole for cutting off double-circuit overhead line |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105155911A (en) * | 2015-09-07 | 2015-12-16 | 安徽华电工程咨询设计有限公司 | Double-loop double-side on-off steel tube role tower adopting triangular cross beam arrangement |
| CN205046931U (en) * | 2015-09-07 | 2016-02-24 | 安徽华电工程咨询设计有限公司 | Steel pipe shaft tower is cut -off to two sides in two return circuits that adopt triangle -shaped cross arm to arrange |
| CN205046915U (en) * | 2015-09-07 | 2016-02-24 | 安徽华电工程咨询设计有限公司 | Adopt two sides in two return circuits of V style of calligraphy combination cluster to cut -off steel pipe shaft tower |
| CN205531600U (en) * | 2016-04-11 | 2016-08-31 | 荆州市荆力工程设计咨询有限责任公司 | A steel pipe pole for transmitting electricity side change of two return circuits |
| CN107386758A (en) * | 2017-06-21 | 2017-11-24 | 国核电力规划设计研究院有限公司 | A kind of double back transmission line cut-offs steel pipe tower and system |
| WO2018059190A1 (en) * | 2016-09-29 | 2018-04-05 | 江苏神马电力股份有限公司 | Tower head of power transmission tower, and power transmission tower |
| CN209942341U (en) * | 2019-03-31 | 2020-01-14 | 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 double-circuit overhead line breaking |
-
2019
- 2019-03-31 CN CN201910254549.6A patent/CN109914897B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101555732A (en) * | 2009-05-07 | 2009-10-14 | 中国电力科学研究院 | Tension-compression main material type electric power pylon |
| CN203412348U (en) * | 2013-08-06 | 2014-01-29 | 安徽华电工程咨询设计有限公司 | Double-circuit single circuit cutoff power transmission steel pipe pole in Y-shaped cross arm arrangement |
| CN204691370U (en) * | 2015-04-09 | 2015-10-07 | 国家电网公司 | The novel butterfly in 110kV double loop, high altitude localities bores more tower |
| CN105155911A (en) * | 2015-09-07 | 2015-12-16 | 安徽华电工程咨询设计有限公司 | Double-loop double-side on-off steel tube role tower adopting triangular cross beam arrangement |
| CN205046931U (en) * | 2015-09-07 | 2016-02-24 | 安徽华电工程咨询设计有限公司 | Steel pipe shaft tower is cut -off to two sides in two return circuits that adopt triangle -shaped cross arm to arrange |
| CN205046915U (en) * | 2015-09-07 | 2016-02-24 | 安徽华电工程咨询设计有限公司 | Adopt two sides in two return circuits of V style of calligraphy combination cluster to cut -off steel pipe shaft tower |
| CN205531600U (en) * | 2016-04-11 | 2016-08-31 | 荆州市荆力工程设计咨询有限责任公司 | A steel pipe pole for transmitting electricity side change of two return circuits |
| WO2018059190A1 (en) * | 2016-09-29 | 2018-04-05 | 江苏神马电力股份有限公司 | Tower head of power transmission tower, and power transmission tower |
| CN107386758A (en) * | 2017-06-21 | 2017-11-24 | 国核电力规划设计研究院有限公司 | A kind of double back transmission line cut-offs steel pipe tower and system |
| CN209942341U (en) * | 2019-03-31 | 2020-01-14 | 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 double-circuit overhead line breaking |
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| CN109914897A (en) | 2019-06-21 |
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