CN115126325A - Cat-head tower of overhead transmission line and middle-phase transformation method of cat-head tower - Google Patents
Cat-head tower of overhead transmission line and middle-phase transformation method of cat-head tower Download PDFInfo
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- CN115126325A CN115126325A CN202210591672.9A CN202210591672A CN115126325A CN 115126325 A CN115126325 A CN 115126325A CN 202210591672 A CN202210591672 A CN 202210591672A CN 115126325 A CN115126325 A CN 115126325A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 43
- 238000011426 transformation method Methods 0.000 title claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 156
- 239000002131 composite material Substances 0.000 claims abstract description 42
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000009413 insulation Methods 0.000 claims abstract description 17
- 229910052742 iron Inorganic materials 0.000 claims abstract description 17
- 239000012212 insulator Substances 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 16
- 238000002788 crimping Methods 0.000 claims description 13
- 230000009466 transformation Effects 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- 239000003365 glass fiber Substances 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 229920002379 silicone rubber Polymers 0.000 claims description 4
- 230000001131 transforming effect Effects 0.000 claims description 2
- 230000004048 modification Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 241000282326 Felis catus Species 0.000 description 17
- 239000004020 conductor Substances 0.000 description 7
- 230000009194 climbing Effects 0.000 description 3
- 238000002715 modification method Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/24—Cross arms
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Abstract
The invention belongs to the technical field of overhead transmission line insulation, and provides a cat-head tower of an overhead transmission line and a phase transformation method in the cat-head tower. The cat-head tower comprises a tower body, an upper cross arm and a transmission line lead, wherein the upper cross arm is of a truss structure and is fixedly arranged at the top of the tower body; the middle of the upper cross arm comprises a longitudinal hanging point tower material, and the longitudinal hanging point tower material is connected with a transmission line lead through an insulator string; the connecting tower material around the longitudinal hanging point tower material comprises a plurality of middle bottom surface main materials at two sides and a plurality of middle auxiliary materials at the upper end, which are composite insulating tower materials, so that the longitudinal hanging point tower material is insulated from the main body of the cross arm on the iron tower. The manufacturing method comprises the following steps: original angle steel tower materials around a longitudinal hanging point tower material of an original cat-head tower are replaced by composite insulating tower materials with the same length, so that the longitudinal hanging point tower material is insulated from a main body of a cross arm on an iron tower, and the insulating distance between an electrified part of the tower and the ground potential is increased; the invention has the advantages of small investment, convenient modification, practicality and effectiveness.
Description
Technical Field
The invention belongs to the technical field of overhead transmission line insulation, and particularly relates to an overhead transmission line cat-head tower and a cat-head tower phase-phase modification method for increasing insulation creep distance and clearance in a phase.
Background
In order to effectively avoid the occurrence of overhead transmission line faults such as pollution flashover, windage yaw, bird damage, air gap breakdown and the like, an electric power enterprise spends a large amount of funds each year to perform technical transformation work, and the general transformation mode is as follows:
(1) the number of the porcelain/glass insulators is increased or longer composite insulators are replaced, so that the insulation creepage distance and the gap distance are effectively increased;
(2) and the composite cross arm is adopted to increase the insulation creepage distance and the clearance distance.
However, in the process of implementing the technical solution in the embodiment of the present application, the inventors of the present application found that the above-mentioned technology has at least the following technical problems:
(1) by adopting the technology of increasing the length of the insulator string for climbing adjustment, the tower head gap structure, the parameters such as the conductor sag, the conductor crossing span distance and the like need to be comprehensively checked, and the adjustment cannot be carried out if the parameters are not satisfied;
(2) the composite cross arm is adopted to increase the insulation creepage distance and the clearance distance, the whole structure of the iron tower cross arm needs to be replaced, the capital investment is large, the existing iron tower composite cross arm is completely applied to the side cross arm, and no effective solution is available for the middle phase of the tower window structure and the internal transformation of the compact iron tower window.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides an overhead transmission line cat-head tower and a method for transforming the cat-head tower in the overhead transmission line cat-head tower.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
an overhead power transmission line cat-head tower comprises a tower body, an upper cross arm and a power transmission line lead, wherein the upper cross arm is of a truss structure and is fixedly arranged at the top of the tower body; the middle of the upper cross arm comprises a longitudinal hanging point tower material, and the longitudinal hanging point tower material is connected with a transmission line lead through an insulator string;
the connecting tower material around the longitudinal hanging point tower material comprises a plurality of middle bottom surface main materials at two sides and a plurality of middle auxiliary materials at the upper end; the middle bottom surface main material and the middle auxiliary material are both composite insulating tower materials, so that the longitudinal hanging point tower materials are insulated from the main body of the cross arm on the iron tower.
Further, the longitudinal hanging point tower material is a composite insulating tower material or a steel tower material.
Furthermore, the composite insulating tower material comprises a core rod, and a yoke plate and a crimping hardware which are positioned at two ends of the core rod, wherein the core rod is connected with the yoke plate through the crimping hardware, and the periphery of the core rod is wrapped with an insulating coating; the yoke plate is provided with a plurality of bolt eye holes for connection.
Further, the core rod is made of a glass fiber reinforced resin rod.
Furthermore, the insulating coating is made of high molecular polymer taking silicon rubber as a matrix.
Meanwhile, the invention also provides a cat-head tower middle phase transformation method, wherein the cat-head tower transformed by the cat-head tower middle phase transformation method is any one of the cat-head towers of the overhead transmission lines; the original cat-head tower comprises a tower body, an upper cross arm and a transmission line lead; the upper cross arm is of a truss structure and is fixedly arranged at the top of the tower body; the middle of the upper cross arm comprises a longitudinal hanging point tower material, and the longitudinal hanging point tower material is connected with a transmission line lead through an insulator string; the connecting tower material around the longitudinal hanging point tower material comprises a plurality of middle bottom surface main materials at two sides and a plurality of middle auxiliary materials at the upper end;
the middle phase modification method of the cat head tower comprises the following steps:
the method comprises the steps of replacing connecting tower materials around a longitudinal hanging point tower material of an original cat head tower, wherein the connecting tower materials comprise middle bottom surface main materials at two sides and middle auxiliary materials at the upper end of the connecting tower material, and are replaced by composite insulating tower materials, after replacement, the longitudinal hanging point tower material is insulated from a main body of a cross arm on an iron tower, and meanwhile, the ground potential position of the cat head tower is changed from the original potential position of the longitudinal hanging point tower material perpendicular to a wire of a power transmission line to the transformed ground potential position of the longitudinal tower material adjacent to the longitudinal hanging point tower material, so that the insulation creepage distance and the gap distance between the electrified part of the cat head tower and the ground potential are increased to be a third air gap from a first air gap.
Furthermore, the longitudinal hanging point tower material of the original cat head tower is also replaced by a composite insulating tower material.
Furthermore, the composite insulating tower material comprises a core rod, and a yoke plate and a crimping hardware which are positioned at two ends of the core rod, wherein the core rod is connected with the yoke plate through the crimping hardware, and the periphery of the core rod is wrapped with an insulating coating; the yoke plate is provided with a plurality of bolt eye holes for connection.
Furthermore, the number and the aperture of the bolt eyelets of the composite insulating tower material are set according to the original connecting plate of the tower material which needs to be replaced on site.
Further, the overall length dimension of the composite insulating tower material is the same as the length dimension of the original steel tower material to be replaced.
Compared with the prior art, the invention has the following beneficial effects:
the technical scheme of the invention adopts a method for replacing partial iron tower auxiliary materials, original angle steel tower materials around a longitudinal hanging point tower material of a cat head tower are replaced by composite insulating tower materials with the same length, after replacement, the longitudinal hanging point tower material is insulated from a main body of a cross arm on an iron tower, and simultaneously, the ground potential position of the cat head tower is changed from the longitudinal hanging point tower material vertical to a wire of a power transmission line to a deflected longitudinal tower material adjacent to the longitudinal hanging point tower material, so that the insulation creepage distance and the gap distance between the live part of the cat head tower and the ground potential are increased from a first air gap to a third air gap; compared with the mode of increasing the length of the insulator string to adjust the climbing or adopting the composite cross arm, the technical scheme of the invention has the advantages of simple structure, convenient operation, no need of checking parameters such as tower head gap structure, conductor sag, conductor cross spanning distance and the like, no need of replacing the whole structure of the iron tower cross arm, convenient middle-phase and compact iron tower window internal progressive replacement and transformation of the tower window structure, small investment for transformation, simple and convenient transformation, practicality and effectiveness.
Drawings
Fig. 1 is a schematic structural view of a tower window of an overhead transmission line cat-head tower;
FIG. 2 is a schematic view of a partial structure of a tower window of an overhead transmission line cat-head tower;
FIG. 3 is a schematic structural view of a composite insulation tower material;
the notation in the figure is: 1-a tower body; 2-upper cross arm; 3, longitudinally hanging a point tower material; 4-middle bottom main material; 5-middle auxiliary materials; 6-insulator string; 7-transmission line conductor; 8-in-situ potential position; 9-the position of the ground potential after transformation; 10-a core rod; 11-a yoke plate; 12-crimping fittings; 13-bolt eye; 14-insulating coating; d 1-first air gap; d2 — second air gap; d 3-third air gap.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
As shown in fig. 1, if a line changes due to a change in the surrounding environment, which causes a frequent breakdown of the spatial gap in the middle phase to perform a discharge trip, a first air gap d1 between the charged part (i.e., the transmission line conductor 7) and the upper cross arm 2 needs to be increased, and if the length of the insulator string 6 is increased for adjustment, the distance between the charged part and the second air gap d2 of the lower crank arm is insufficient, which causes a discharge trip; at present, companies at home and abroad do not have a composite cross arm applied to the middle of a tower window, and a method for increasing the insulation creepage distance and the clearance distance by adopting the composite cross arm cannot be adopted. The problem is solved by the cat-head tower of the overhead transmission line or the method for phase transformation in the cat-head tower provided by the embodiment of the invention.
Example 1
As shown in fig. 1-2, an embodiment of the present invention provides an overhead transmission line cat-head tower, which includes a tower body 1, an upper cross arm 2 and a transmission line conductor 7; the upper cross arm 2 is of a truss structure and is fixedly arranged at the top of the tower body 1; the middle of the upper cross arm 2 comprises a longitudinal hanging point tower material 3, and the longitudinal hanging point tower material 3 is connected with a transmission line lead 7 through an insulator string 6;
the connecting tower materials around the longitudinal hanging point tower materials 3 comprise a plurality of middle bottom surface main materials 4 at two sides and a plurality of middle auxiliary materials 5 at the upper end; the middle bottom surface main material 4 and the middle auxiliary material 5 are both composite insulating tower materials, so that the longitudinal hanging point tower material 3 is insulated from the main body of the cross arm 2 on the iron tower.
The upper cross arm 2 of the common cat-head tower in the prior art is integrally conducted, and the position of the ground potential is usually positioned at the original site potential position 8 of the vertical hanging point tower material 3 vertical to the electric transmission line lead 7; the tower materials around the longitudinal hanging point tower material 3 in the embodiment of the invention are all composite insulation tower materials, so that the longitudinal hanging point tower material 3 is insulated from the main body of the upper cross arm 2, and thus the ground potential position of the cat head tower provided by the embodiment of the invention is changed from the original potential position 8 to the modified ground potential position, namely the longitudinal hanging point tower material 3 vertical to the electric transmission line lead 7 is deviated to the adjacent longitudinal tower material of the longitudinal hanging point tower material 3 (namely the end position of the modified transverse composite insulation tower material), so that the insulation creepage distance and the clearance distance between the live part of the cat head tower and the ground potential are increased from the first air clearance d1 to the third air clearance d 3.
Because the connecting tower materials between the longitudinal point-hanging tower material 3 and the main body of the upper cross arm 2 are all composite insulating tower materials, the longitudinal point-hanging tower material 3 is not conducted with the ground and is also equivalent to an insulator, the longitudinal point-hanging tower material 3 can be a composite insulating tower material 4 or a steel tower material, and the purpose of insulating the longitudinal point-hanging tower material 3 and the main body of the upper cross arm 2 can be achieved.
In the embodiment of the invention, as shown in fig. 3, the composite insulating tower material includes a core rod 10, and a yoke plate 11 and a crimping fitting 12 which are located at two ends of the core rod 10, the core rod 10 is connected with the yoke plate 11 through the crimping fitting 12, and an insulating coating 14 is wrapped on the periphery of the core rod 10; the yoke plate 11 is provided with a plurality of bolt eyelets 13 for connection.
The core rod 10 is made of a glass fiber reinforced resin rod, has high tensile strength (more than 1100Mpa) and is about 1.5-2 times of that of common steel; in addition, the core rod 10 also has good vibration damping, creep resistance, and fatigue fracture resistance; the insulating coating 14 used outside the composite insulating tower material is made of high molecular polymer taking silicon rubber as a matrix, and has the advantages of good corrosion resistance, aging resistance and the like.
Example 2
The embodiment of the invention provides a method for phase reconstruction in a kilovolt cat head tower, wherein the kilovolt cat head tower reconstructed by the method for phase reconstruction in the kilovolt cat head tower is the cat head tower of the overhead transmission line in the embodiment 1. The original cat-head tower comprises a tower body 1, an upper cross arm 2 and a transmission line lead 7; the upper cross arm 2 is of a truss structure and is fixedly arranged at the top of the tower body 1; the middle of the upper cross arm 2 comprises a longitudinal hanging point tower material 3, and the longitudinal hanging point tower material 3 is connected with a transmission line lead 7 through an insulator string 6; the connecting tower materials around the longitudinal hanging point tower materials 3 comprise a plurality of middle bottom surface main materials 4 at two sides and a plurality of middle auxiliary materials 5 at the upper end;
the middle-phase modification method for the cat-head tower comprises the following steps:
the connecting tower materials around the longitudinal hanging point tower material 3 of the original cat head tower, including the middle bottom surface main material 4 at two sides and the middle auxiliary material 5 at the upper end, are replaced by composite insulating tower materials, after replacement, the longitudinal hanging point tower material 3 is insulated from the main body of the cross arm 2 on the iron tower, and meanwhile, the ground potential position of the cat head tower is changed from the original site potential position 8 at the longitudinal hanging point tower material 3 vertical to the conducting wire 7 of the power transmission line to the transformed site potential position 9 at the longitudinal tower material adjacent to the longitudinal hanging point tower material 3, so that the insulating creepage distance and the gap distance between the electrified part of the cat head tower and the ground potential are increased to be the third air gap d3 from the first air gap d 1.
Because the connecting tower materials between the longitudinal hanging point tower material 3 and the main body of the upper cross arm 2 are all composite insulating tower materials, the longitudinal hanging point tower material 3 is not conducted with the ground and is also equivalent to an insulator, the longitudinal hanging point tower material 3 can be replaced by the composite insulating tower material 4, the original steel tower material can be reserved, and the purpose of insulating the longitudinal hanging point tower material 3 and the main body of the upper cross arm 2 can be achieved.
In the embodiment of the present invention, as shown in fig. 3, the composite insulating tower material includes a core rod 10, and a yoke plate 11 and a crimping fitting 12 which are located at two ends of the core rod 10, the core rod 10 is connected to the yoke plate 11 through the crimping fitting 12, and an insulating coating 14 is wrapped around the core rod 10; the yoke plate 11 is provided with a plurality of bolt eyelets 13 for connection.
The core rod 10 is made of a glass fiber reinforced resin rod, has high tensile strength (more than 1100Mpa) and is about 1.5-2 times of that of common steel; in addition, the core rod 10 also has good vibration damping, creep resistance, and fatigue fracture resistance; the insulating coating 14 used outside the composite insulating tower material is made of high molecular polymer with silicon rubber as a matrix, and has the advantages of good corrosion resistance, aging resistance and the like.
In addition, for convenience of replacement, the number and the pore size of the bolt eyelets 13 of the composite insulating tower material are set according to the original connecting plate of the tower material which needs to be replaced on site. The overall length dimension of the composite insulation tower material is the same as that of the original steel tower material needing to be replaced.
Compared with the mode of increasing the length of the insulator string to adjust the climbing or adopting the composite cross arm, the technical scheme of the embodiment of the invention has the advantages of simple structure, convenient operation, no need of checking parameters such as tower head gap structure, wire sag, wire crossing span distance and the like, no need of replacing the whole structure of the cross arm of the iron tower, convenient progressive replacement and transformation of the middle phase of the tower window structure and the inside of the compact tower window of the iron tower, small investment for transformation, simple and convenient transformation, practicability and effectiveness.
The above description is only an example of the present application and is not intended to limit the present invention. Any modification, equivalent replacement, and improvement made within the scope of the application of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An overhead power transmission line cat-head tower comprises a tower body (1), an upper cross arm (2) and a power transmission line lead (7), and is characterized in that the upper cross arm (2) is of a truss structure and is fixedly arranged at the top of the tower body (1); the middle of the upper cross arm (2) comprises a longitudinal hanging point tower material (3), and the longitudinal hanging point tower material (3) is connected with a transmission line lead (7) through an insulator string (6);
the connecting tower materials around the longitudinal hanging point tower materials (3) comprise a plurality of middle bottom surface main materials (4) at two sides and a plurality of middle auxiliary materials (5) at the upper end; the middle bottom surface main material (4) and the middle auxiliary material (5) are both composite insulating tower materials, so that the longitudinal hanging point tower material (3) is insulated from the main body of the cross arm (2) on the iron tower.
2. The overhead transmission line cat-head tower according to claim 1, wherein the longitudinal hanging-point tower material (3) is a composite insulating tower material or a steel tower material.
3. The cat-head tower of the overhead transmission line according to claim 1, wherein the composite insulating tower material comprises a core rod (10), and a connecting plate (11) and a crimping fitting (12) which are positioned at two ends of the core rod (10), the core rod (10) is connected with the connecting plate (11) through the crimping fitting (12), and an insulating coating (14) is wrapped on the periphery of the core rod (10); the yoke plate (11) is provided with a plurality of bolt eye holes (13) for connection.
4. An overhead transmission line cat-head tower according to claim 3, characterized in that the core rod (10) is made of a glass fiber reinforced resin rod.
5. An overhead transmission line cat-head tower according to claim 3, characterized in that the insulating coating (14) is made of high molecular polymer with silicon rubber as a matrix.
6. A cat-head tower middle-phase reconstruction method, wherein the cat-head tower reconstructed by the cat-head tower middle-phase reconstruction method is the cat-head tower of the overhead transmission line of any one of claims 1 to 5; the original cat-head tower comprises a tower body (1), an upper cross arm (2) and a transmission line lead (7); the upper cross arm (2) is of a truss structure and is fixedly arranged at the top of the tower body (1); the middle of the upper cross arm (2) comprises a longitudinal hanging point tower material (3), and the longitudinal hanging point tower material (3) is connected with a transmission line lead (7) through an insulator string (6); the connecting tower materials around the longitudinal hanging point tower materials (3) comprise a plurality of middle bottom surface main materials (4) at two sides and a plurality of middle auxiliary materials (5) at the upper ends;
the method is characterized in that the method for transforming the cat-head tower comprises the following steps:
the method comprises the steps that connecting tower materials around a longitudinal hanging point tower material (3) of an original cat-head tower, including middle bottom surface main materials (4) on two sides and middle auxiliary materials (5) on the upper end of the tower are replaced by composite insulating tower materials, after replacement, the longitudinal hanging point tower material (3) is insulated from a main body of a cross arm (2) on the iron tower, meanwhile, the ground potential position of the cat-head tower is changed from an original site potential position (8) at the longitudinal hanging point tower material (3) perpendicular to a power transmission line lead (7) to a modified site potential position (9) at the longitudinal tower material adjacent to the longitudinal hanging point tower material (3) which is inclined, and therefore the insulation creepage distance and the clearance distance between the live part of the cat-head tower and the ground potential are increased to be a third air clearance (d3) from a first air clearance (d 1).
7. The method for phase transformation in the cat-head tower according to claim 6, wherein the longitudinal hanging-point tower material (3) of the original cat-head tower is also replaced by a composite insulating tower material.
8. The cat-head tower middle-phase transformation method according to claim 6, characterized in that the composite insulation tower material comprises a core rod (10), and a connecting plate (11) and a crimping fitting (12) which are positioned at two ends of the core rod (10), wherein the core rod (10) is connected with the connecting plate (11) through the crimping fitting (12), and the periphery of the core rod (10) is wrapped with an insulation coating (14); the yoke plate (11) is provided with a plurality of bolt eye holes (13) for connection.
9. The method for modifying the middle phase of the cat-head tower according to claim 8, wherein the number and the aperture size of the bolt eyelets (13) of the composite insulating tower material are set according to the original connecting plate of the tower material to be replaced on site.
10. The method for phase transformation in a cat-head tower according to claim 9, wherein the overall length dimension of the composite insulating tower material is the same as the length dimension of the original steel tower material to be replaced.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210591672.9A CN115126325A (en) | 2022-05-27 | 2022-05-27 | Cat-head tower of overhead transmission line and middle-phase transformation method of cat-head tower |
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| CN202210591672.9A CN115126325A (en) | 2022-05-27 | 2022-05-27 | Cat-head tower of overhead transmission line and middle-phase transformation method of cat-head tower |
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| CN102409888A (en) * | 2010-09-25 | 2012-04-11 | 河南省电力公司焦作供电公司 | Improved cat-head type tower |
| CN203924859U (en) * | 2014-06-26 | 2014-11-05 | 福建永福工程顾问有限公司 | Novel cat-head transmission tower shelf structure |
| CN106567603A (en) * | 2016-10-27 | 2017-04-19 | 中国电力工程顾问集团西北电力设计院有限公司 | 750 kV wine glass composite cross arm tower |
| CN209250182U (en) * | 2018-09-20 | 2019-08-13 | 成都星河科技产业有限公司 | A kind of 10kV frame-type single loop triangle arrangement insulator crossarm |
| CN211647538U (en) * | 2019-12-26 | 2020-10-09 | 山西长供电力工程有限公司 | Prevent wind partial type cat head tangent tower |
| CN111946129A (en) * | 2020-07-16 | 2020-11-17 | 舟山启明电力设计院有限公司 | 220kV high wind speed area single-loop composite material cross arm cat head type tangent tower |
| CN213980169U (en) * | 2020-08-28 | 2021-08-17 | 温州电力设计有限公司 | Composite material cross arm tower |
| CN214402981U (en) * | 2020-10-20 | 2021-10-15 | 中国能源建设集团浙江省电力设计院有限公司 | Transmission line single loop wine glass tower |
| CN113644611A (en) * | 2021-09-09 | 2021-11-12 | 重庆大学 | Transmission line capacity increasing method based on six-phase transmission technology and insulating cross arm |
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