CN115126325B - Cat head tower of overhead transmission line and medium phase transformation method of cat head tower - Google Patents
Cat head tower of overhead transmission line and medium phase transformation method of cat head tower Download PDFInfo
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- CN115126325B CN115126325B CN202210591672.9A CN202210591672A CN115126325B CN 115126325 B CN115126325 B CN 115126325B CN 202210591672 A CN202210591672 A CN 202210591672A CN 115126325 B CN115126325 B CN 115126325B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 36
- 241000282326 Felis catus Species 0.000 title claims abstract description 19
- 238000011426 transformation method Methods 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 145
- 239000002131 composite material Substances 0.000 claims abstract description 40
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000009413 insulation Methods 0.000 claims abstract description 28
- 229910052742 iron Inorganic materials 0.000 claims abstract description 19
- 239000012212 insulator Substances 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 230000009466 transformation Effects 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 12
- 238000002788 crimping Methods 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 230000009194 climbing Effects 0.000 claims description 8
- 239000003365 glass fiber 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
- 239000011148 porous material Substances 0.000 claims 1
- 239000004945 silicone rubber Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000011159 matrix material Substances 0.000 description 3
- 238000002407 reforming Methods 0.000 description 3
- 230000032683 aging 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
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Insulators (AREA)
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 wire, 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 wire through an insulator string; the connecting tower materials around the longitudinal hanging point tower material comprise a plurality of middle bottom 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: the original angle steel tower materials around the longitudinal hanging point tower materials of the original cat-head tower are replaced by composite insulating tower materials with the same length, so that the longitudinal hanging point tower materials are insulated from the main body of the cross arm on the iron tower, and the insulation distance between the electrified part of the tower and the ground potential is increased; the invention has the advantages of low investment, convenient transformation, practicality and effectiveness.
Description
Technical Field
The invention belongs to the technical field of insulation of overhead transmission lines, and particularly relates to a cat-head tower of an overhead transmission line and a cat-head tower medium-phase transformation method for increasing insulation creepage distance and clearance of the medium-phase.
Background
In order to effectively avoid faults of overhead transmission lines such as pollution flashover, windage yaw, bird damage, air gap breakdown and the like, a great deal of funds are spent on technical transformation work by power enterprises every year, and the general transformation modes are as follows:
(1) The number of porcelain/glass insulator sheets is increased or longer composite insulators are replaced, so that the insulation creepage distance and the clearance distance are effectively increased;
(2) The composite cross arm is adopted to increase the insulation climbing distance and the clearance distance.
However, in the process of implementing the technical solution in the embodiment of the present application, the present inventors have found that at least the following technical problems exist in the above technology:
(1) By adopting the technology of increasing the insulator string length to perform climbing adjustment, the parameters such as tower head gap structure, wire sag, wire crossing distance and the like are required to be comprehensively checked, and cannot be adjusted if the parameters are not satisfied;
(2) The composite cross arm is adopted to increase the insulation climbing distance and the gap distance, the whole structure of the iron tower cross arm needs to be replaced, the fund investment is large, and the composite cross arm of the iron tower is fully applied to the side cross arm at present, so that the middle phase of the tower window structure and the inside of the compact iron tower window are transformed, and no effective solution exists.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides an overhead transmission line cat-head tower and a cat-head tower medium phase transformation method, and aims at the overhead transmission line cat-head tower in the prior art, the method for replacing part of steel tower materials and auxiliary materials of an iron tower is adopted, the original angle steel of the iron tower is replaced by a composite insulating tower material with the same length, and after replacement, the vertical position of an original ground potential position is changed from the vertical position of an electrified position of the iron tower to an offset non-vertical position, so that the insulation distance between the electrified position of the tower and the ground potential is increased.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
The cat-head tower for the overhead transmission line comprises a tower body, an upper cross arm and transmission line wires, 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 wire through an insulator string;
The connecting tower materials around the longitudinal hanging point tower material comprise 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 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.
Further, the composite insulating tower material comprises a core rod, and a yoke plate and a crimping fitting which are positioned at two ends of the core rod, wherein the core rod is connected with the yoke plate through the crimping fitting, and an insulating coating is wrapped on the periphery of the core rod; the yoke plate is provided with a plurality of bolt eyelets 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 with silicon rubber as a matrix.
Meanwhile, the invention also provides a cat-head tower medium phase transformation method, and the cat-head tower transformed by the cat-head tower medium phase transformation method is any overhead transmission line cat-head tower; the original cat head tower comprises a tower body, an upper cross arm and a transmission line wire; 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 wire through an insulator string; the connecting tower materials around the longitudinal hanging point tower material comprise a plurality of middle bottom surface main materials at two sides and a plurality of middle auxiliary materials at the upper end;
the cat-head tower medium phase transformation method comprises the following steps:
The connection tower materials around the longitudinal hanging point tower materials of the original cat head tower comprise middle bottom surface main materials at two sides and middle auxiliary materials at the upper end, the middle bottom surface main materials and the middle auxiliary materials at the upper end are replaced by composite insulation tower materials, after replacement, the longitudinal hanging point tower materials are insulated from the main body of the cross arm on the iron tower, meanwhile, the ground potential position of the cat head tower is changed from the original ground potential position of the longitudinal hanging point tower materials vertical to the transmission line wires into the modified ground potential position of the longitudinal tower materials adjacent to the deflected longitudinal hanging point tower materials, and therefore the insulation climbing distance and the gap distance between the electrified part of the cat head tower and the ground potential are increased from a first air gap to a third air gap.
Further, the vertical hanging point tower material of the original cat-head tower is also replaced by the composite insulating tower material.
Further, the composite insulating tower material comprises a core rod, and a yoke plate and a crimping fitting which are positioned at two ends of the core rod, wherein the core rod is connected with the yoke plate through the crimping fitting, and an insulating coating is wrapped on the periphery of the core rod; the yoke plate is provided with a plurality of bolt eyelets for connection.
Further, the number and the aperture size of the bolt eyelets of the composite insulating tower material are set according to the original yoke plates of the tower material 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 beneficial effects that:
According to the technical scheme, a method for replacing part of auxiliary materials of the iron tower is adopted, original angle steel towers around the longitudinal hanging point tower materials of the cat-head tower are replaced by composite insulating tower materials with the same length, insulation is carried out between the longitudinal hanging point tower materials and a main body of a cross arm on the iron tower after replacement, meanwhile, the ground potential position of the cat-head tower is changed from a vertical hanging point tower material vertical to a transmission line wire to a vertical tower material adjacent to the vertical hanging point tower material, and therefore insulation creepage distance and clearance distance between a charged part of the cat-head tower and the ground potential are increased from a first air clearance to a third air clearance; compared with the mode of increasing the insulator string length to adjust and climb 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, wire sag, wire crossing span distance and the like, no need of replacing the whole structure of the iron tower cross arm, convenient replacement and transformation of the middle phase of the tower window structure and the inside progress of the compact iron tower window, small investment in transformation, simple and convenient transformation, practicality and effectiveness.
Drawings
Fig. 1 is a schematic diagram of a tower window structure of a cat head tower of an overhead transmission line;
fig. 2 is a schematic diagram of a partial structure of a cat-head tower window of an overhead transmission line;
FIG. 3 is a schematic structural view of a composite insulation tower;
The figure indicates: 1-a tower body; 2-upper cross arms; 3, longitudinally hanging a tower material; 4-middle bottom surface main material; 5-an intermediate auxiliary material; 6-insulator strings; 7-a transmission line wire; 8-an original ground potential position; 9-a modified ground potential position; 10-core rod; 11-yoke plates; 12-crimping hardware fittings; 13-bolt eyelets; 14-insulating coating; d1-a first air gap; d2—a second air gap; d3—third air gap.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.
As shown in fig. 1, if the length of the insulator string 6 is increased to perform climbing adjustment, the distance between the charged part (i.e. the transmission line wire 7) and the second air gap d2 of the lower crank arm is insufficient, resulting in discharging trip; at present, all 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 insulation creepage distance and clearance distance by adopting the composite cross arm cannot be adopted. The problem is solved by the overhead transmission line cat-head tower 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 comprises a tower body 1, an upper cross arm 2 and a transmission line wire 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 wire 7 through an insulator string 6;
the connecting tower materials around the longitudinal hanging point tower material 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 composite insulating tower materials, so that the longitudinal hanging point tower materials 3 are insulated from the main body of the upper cross arm 2 of the iron tower.
The upper cross arm 2 of the common cat-head tower in the prior art is conducted integrally, and the ground potential position of the upper cross arm is usually located at the original ground potential position 8 of the vertical hanging point tower material 3 vertical to the transmission line wire 7; the tower materials around the longitudinal hanging point tower material 3 in the embodiment of the invention are all composite insulating tower materials, so that the longitudinal hanging point tower material 3 is insulated from the main body of the upper cross arm 2, and the ground potential position of the cat-head tower provided in the embodiment of the invention is changed from the original ground potential position 8 to the modified ground potential position, namely, the position of the longitudinal hanging point tower material 3 vertical to the transmission line wire 7 is shifted to the position of the longitudinal hanging point tower material 3 adjacent to the longitudinal tower material (namely, the end position of the modified transverse composite insulating tower material), so that the insulation climbing distance and the gap distance between the electrified part of the cat-head tower and the ground potential are increased from the first air gap d1 to the third air gap d3.
Because the connecting tower materials between the longitudinal hanging point tower material 3 and the main body of the upper cross arm 2 are composite insulating tower materials, the longitudinal hanging point tower material 3 is not conducted with the ground and is also equivalent to an insulator, and therefore the longitudinal hanging point tower material 3 can be the composite insulating tower material 4 or a steel tower material, and the purpose of insulation between 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 invention, as shown in fig. 3, the composite insulation tower material comprises a core rod 10, and a yoke 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 yoke plate 11 through the crimping fitting 12, and an insulation 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.
Wherein, the core rod 10 is made of glass fiber reinforced resin rod, has very high tensile strength (more than 1100 Mpa), which is about 1.5-2 times 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, ageing resistance and the like.
Example 2
The embodiment of the invention provides a medium-phase transformation method of a kilovolt cat-head tower, wherein the kilovolt cat-head tower transformed by the medium-phase transformation method is the overhead transmission line cat-head tower in the embodiment 1. The original cat head tower comprises a tower body 1, an upper cross arm 2 and a transmission line wire 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 wire 7 through an insulator string 6; the connecting tower materials around the longitudinal hanging point tower material 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 cat-head tower medium phase transformation method comprises the following steps:
The connection tower materials around the longitudinal hanging point tower material 3 of the original cat head tower comprise middle bottom surface main materials 4 at two sides and middle auxiliary materials 5 at the upper end, the middle bottom surface main materials 4 and the middle auxiliary materials 5 at the upper end are replaced by composite insulation 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, meanwhile, the ground potential position of the cat head tower is changed from an original ground potential position 8 at the longitudinal hanging point tower material 3 vertical to a transmission line wire 7 into a modified ground potential position 9 at the longitudinal tower material adjacent to the oblique longitudinal hanging point tower material 3, and accordingly, the insulation climbing distance and the gap distance between the electrified part of the cat head tower and the ground potential are increased from a first air gap d1 to a third air gap d3.
Because the connecting tower materials between the longitudinal hanging point tower material 3 and the main body of the upper cross arm 2 are composite insulating tower materials, the longitudinal hanging point tower material 3 is not conducted with the ground and is also equivalent to an insulator, so the longitudinal hanging point tower material 3 can be replaced by the composite insulating tower material 4 or can be reserved as an original steel tower material, and the purpose of insulation between 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 invention, as shown in fig. 3, the composite insulation tower material comprises a core rod 10, and a yoke 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 yoke plate 11 through the crimping fitting 12, and an insulation 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.
Wherein, the core rod 10 is made of glass fiber reinforced resin rod, has very high tensile strength (more than 1100 Mpa), which is about 1.5-2 times 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, ageing resistance and the like.
In addition, for the convenience of replacement, the number and the aperture size of the bolt eyelets 13 of the composite insulation tower material are set according to the original yoke plate of the tower material which needs to be replaced on site. 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 mode of increasing the insulator string length to adjust and climb 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 iron tower cross arm, convenience in replacing and reforming the middle phase of the tower window structure and the inside of the compact iron tower window, small investment in reforming capital, simplicity and convenience in reforming, practicability and effectiveness.
The foregoing description is only exemplary of the application and is not intended to limit the application. Any modification, equivalent replacement, improvement, etc. made within the scope of the present application should be included in the protection scope of the present application.
Claims (5)
1. The medium-phase transformation method of the cat head tower comprises a tower body (1), an upper cross arm (2) and a transmission line wire (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 wire (7) through an insulator string (6); the connecting tower materials around the longitudinal hanging point tower material (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 method is characterized in that the method for reconstructing the middle phase of the cat-head tower comprises the following steps:
The method comprises the steps that connection tower materials around a longitudinal hanging point tower material (3) of an original cat head tower comprise middle bottom surface main materials (4) at two sides and middle auxiliary materials (5) at the upper end, the connection tower materials are replaced by composite insulation tower materials, insulation between the longitudinal hanging point tower material (3) and a main body of a cross arm (2) on an iron tower is achieved after replacement, meanwhile, the ground potential position of the cat head tower is changed from an original ground potential position (8) at the longitudinal hanging point tower material (3) perpendicular to a transmission line wire (7) to a modified ground potential position (9) at the longitudinal tower material adjacent to the oblique longitudinal hanging point tower material (3), and accordingly insulation climbing distance and gap distance between a charged part of the cat head tower and the ground potential are increased from a first air gap (d 1) to a third air gap (d 3);
The longitudinal hanging point tower material (3) is a composite insulating tower material or a steel tower material;
The composite insulating tower material comprises a core rod (10), and connecting plates (11) and crimping fittings (12) which are positioned at two ends of the core rod (10), wherein the core rod (10) is connected with the connecting plates (11) through the crimping fittings (12), and an insulating coating (14) is wrapped on the periphery of the core rod (10); the connecting plate (11) is provided with a plurality of bolt eyelets (13) for connection.
2. The method for phase transformation in a cat head tower according to claim 1, wherein the core rod (10) is made of glass fiber reinforced resin rod.
3. The method of phase inversion in a cat head tower according to claim 1, wherein said insulating coating (14) is made of a high molecular polymer based on silicone rubber.
4. The method for phase transformation in a cat head tower according to claim 1, wherein the number and the pore size of the bolt eyelets (13) of the composite insulating tower material are set according to the original yoke plate of the tower material to be replaced on site.
5. The method of claim 4, wherein the composite insulation tower has an overall length that is the same as the length of the original steel tower to be replaced.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210591672.9A CN115126325B (en) | 2022-05-27 | 2022-05-27 | Cat head tower of overhead transmission line and medium phase transformation method of cat head tower |
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| CN202210591672.9A CN115126325B (en) | 2022-05-27 | 2022-05-27 | Cat head tower of overhead transmission line and medium phase transformation method of cat head tower |
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| CN115126325B true CN115126325B (en) | 2024-06-21 |
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| KR100213675B1 (en) * | 1997-07-21 | 1999-08-02 | 윤문수 | Cable support for overhead distribution assembling pole |
| CN102409888B (en) * | 2010-09-25 | 2014-04-02 | 国家电网公司 | Improved cat-head type tower |
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| 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 |
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| CN212535271U (en) * | 2020-07-28 | 2021-02-12 | 国网甘肃省电力公司经济技术研究院 | 110kV cat head type composite cross arm tower |
| CN113027215A (en) * | 2021-03-30 | 2021-06-25 | 国网河南省电力公司西峡县供电公司 | Double-loop drilling and crossing tower for power transmission line |
| CN113374330A (en) * | 2021-06-25 | 2021-09-10 | 中国电力工程顾问集团华北电力设计院有限公司 | Transmission line cat head tower suitable for it exceeds limit tower position to sway angle |
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| 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 |
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