CN109066552B - Power transmission line protection device - Google Patents
Power transmission line protection device Download PDFInfo
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- CN109066552B CN109066552B CN201811062854.7A CN201811062854A CN109066552B CN 109066552 B CN109066552 B CN 109066552B CN 201811062854 A CN201811062854 A CN 201811062854A CN 109066552 B CN109066552 B CN 109066552B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/02—Devices for adjusting or maintaining mechanical tension, e.g. take-up device
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Abstract
The invention belongs to the field of auxiliary equipment of a power distribution network, and particularly relates to a power transmission line protection device. Through utilizing power component to obtain drive power, the drive rack downstream makes power transmission line and adjusting part's contact point move down, and then makes the rate of tension of power transmission line improve, and wind-force is stronger, and the gear moving distance that moves down is bigger, and the rate of tension of power transmission line is higher, and then makes the pretightning force of power transmission line strengthen along with the reinforcing of wind-force size, and after the pretightning force improved, the ability that the power transmission line resisted the deformation was improved.
Description
Technical Field
The invention belongs to the field of auxiliary equipment of a power distribution network, and particularly relates to a power transmission line protection device.
Background
Distribution network transmission line is now through erectting the pole and connect the power transmission line between the pole and realize electric energy transmission, because the power transmission line quality is heavier and contain high-tension electricity consequently need a large amount of poles with its support and unsettled, under the normal conditions, the power transmission line between two poles still need exert certain pretightning force but too tightly that can not draw in taut while, prevent on the one hand that stress is too big to lead to structural damage, provide the allowance of warping for the expend with heat and contract with cold of power transmission line and relevant structure on the one hand. In the power transmission line use, can meet strong convection weather often, the air current effect can produce powerful pulling force on longer transmission cable, because the power transmission line in current structure possesses certain tensile deformability usually, probably lead to the power transmission line to be blown under the stress action in the twinkling of an eye and draw the length of side, the pole distance is more far away simultaneously, the deformation degree of power transmission line between the pole is big more, because each power transmission line atress condition, the pretightning force condition and the deformation degree are not identical, the power transmission line that probably leads to the deformation is close to each other and is caused the short circuit, the condition such as electric wire winding, normal operating to the electric wire netting, the stability of structure brings the hidden danger.
Disclosure of Invention
The invention aims to provide a power transmission line protection device, which can improve the pretightening force on a power transmission line when people are under the action of strong wind, automatically adjust the pretightening force according to the wind power and prevent the power transmission lines between power transmission line poles from approaching each other after being stretched.
In order to achieve the purpose, the invention adopts the following technical scheme.
A power transmission line protection device comprises a power assembly, a transmission assembly and a plurality of adjusting assemblies;
the power assembly comprises a hollow connecting seat, and a vertically downward power rod is arranged at the lower end of the connecting seat; the wind-receiving bowl is of a bowl-shaped structure and is arranged around the connecting seat in an annular array mode, and the wind-receiving bowl is connected with the connecting seat through the connecting rod; the transmission assembly comprises a transmission rod which is vertically arranged, the transmission rod is coaxially opposite to the power rod, and the upper end of the transmission rod is connected with the lower end of the power rod so that the transmission rod rotates along with the power rod; the transmission rod is inserted into the fixed seat from the first mounting hole; a worm wheel and worm group is arranged in the fixed seat, a worm in the worm wheel and worm group is provided with a worm hole along the axis of the worm, and the lower end of the transmission rod is inserted into the worm hole and connected with the worm; the worm is vertically arranged, the axis of the turbine is horizontally arranged, a shaft hole is formed in the axis of the turbine, a transmission shaft is arranged in the shaft hole, and the transmission shaft synchronously rotates along with the turbine; the adjusting assembly comprises a hollow adjusting seat, a gear rack group is arranged in the adjusting seat, the gear is sleeved on the transmission shaft and synchronously rotates along with the transmission shaft, a second mounting hole for the transmission shaft to penetrate through is formed in the adjusting seat, and the gear rack is vertically arranged; the rack is provided with guide strips distributed along the vertical direction, the adjusting seat is correspondingly provided with guide grooves distributed along the vertical direction, and the guide strips slide along the guide grooves so that the rack can move along the vertical direction; the lower end of the rack is provided with a sliding hole; the power transmission line is characterized by further comprising a rotating wheel and a connecting point, wherein the rotating wheel and the connecting point are arranged on the electric pole, the rotating wheel and the connecting point are respectively arranged on the front side and the rear side of the rack, and the power transmission line is connected to the connecting point through the sliding hole after bypassing the rotating wheel.
The further optimization is that the fixed seat and the adjusting seat are provided with fixed holes so as to be fixed on the power grid foundation structure.
The further optimization is that the lower end of the rack is of an inverted U-shaped structure, two idler wheels are arranged between two arms of the inverted U-shaped structure in the vertical direction, the sliding hole is formed by the two idler wheels and the two arms of the inverted U-shaped structure in a surrounding mode, and the power grid power transmission line is arranged between the two idler wheels. In the use, need control the power transmission line through the sliding hole, for preventing the power transmission line wearing and tearing in the use repeatedly, set up the sliding hole into two gyro wheels and two arm structures and constitute, use the roll and replace the slip, reduce friction, reduce the power transmission line wearing and tearing, improve the smooth and easy nature of action.
The worm driving mechanism further comprises a fixing bolt, the fixing bolt comprises a section of threaded column, a first threaded hole is formed in the connecting seat at the position corresponding to the lower end of the transmission rod, the threaded column is screwed into the first threaded hole, a rotating column is arranged at the upper end of the fixing bolt, a rotating hole is formed in the lowest end of the transmission rod, the rotating column is inserted into the rotating hole, an adjusting ring is arranged between the fixing bolt and the connecting seat, the upper end face of the adjusting ring abuts against the lower end face of the worm, and the lower end face of the adjusting ring abuts against the lower surface of the inner; the periphery of the connecting hole on the outer end face of the connecting seat is provided with a reinforcing cylinder, and the transmission rod penetrates through the reinforcing cylinder and extends into the connecting seat; the transmission rod is provided with a shaft shoulder at the part inside the connecting seat, the upper end surface of the shaft shoulder is propped against the upper surface of the inner cavity of the connecting seat, and the lower end surface of the shaft shoulder is propped against the upper end surface of the worm. The reinforcing cylinder is arranged to enable the transmission rod to keep a vertical direction, the strength of the transmission rod is improved, the transmission rod is prevented from being broken, the upper position and the lower position of the worm can be adjusted by the adjusting ring, the worm gear set is convenient to correct and maintain, and the fixing bolt structure is arranged to facilitate the disassembly and assembly maintenance of the worm gear.
The further optimization is that the upper end and the lower end of the adjusting seat are provided with openings for the racks to penetrate out; one side of adjusting the seat and being provided with the third mounting hole dorsad the connecting seat, be provided with the end cover in the third mounting hole, one side that the end cover was towards adjusting the seat inner chamber is provided with and extends the arch to the gear and be annular holding ring, and the corresponding constant head tank that is provided with on the gear. Utilize holding ring and constant head tank to make the gear keep relatively fixed position in adjusting the seat for rack and pinion can steady motion, reduces the structure complexity.
Further optimization is that the transmission shaft is connected with the turbine through the metal key and rotates synchronously, and the turbine and the transmission shaft are both provided with key grooves for installing the metal key, wherein the key grooves on the transmission shaft extend along the shaft body to two sides so that the connecting seat can slide along the transmission shaft. Set to slidable structure, be convenient for adjust the relative mounted position of connecting seat and fixing base as required in the installation, utilize cross arm or other structures's more suitable mounted position to install on the pole, improve adaptability, prevent that the structure from being blockked to lead to unable the use.
The further optimization is that the fixing seat is composed of a box-packed structure with an opening at one side and a sealing cover covering the opening, annular bearing tables are respectively arranged on the end surface of the inner side of the sealing cover and the surface of the inner wall of the fixing seat opposite to the sealing cover, and rolling bearings are arranged in the two bearing tables. The rolling bearing is arranged, so that friction between the transmission shaft and the fixing seat is reduced, transmission efficiency of the transmission shaft is improved, and smoothness of the device in use is improved.
The beneficial effects are that:
the power transmission line protection device can utilize the power assembly to obtain driving force to drive the rack to move downwards when instant strong wind is generated, so that the contact point of the power transmission line and the adjusting assembly moves downwards, the tension degree of the power transmission line is improved, the stronger the wind power, the larger the downward moving distance of the gear, the higher the tension degree of the power transmission line, the higher the pretightening force of the power transmission line is, the stronger the wind power is, the capability of the power transmission line for resisting deformation is improved after the pretightening force is improved, the situations that the power transmission line between electric poles is deformed excessively and short circuit is caused by displacement and the like can be avoided, the deformation of the power transmission line between the two electric poles is transferred to the pushing deformation of the power transmission line below the rack, the device can self-adaptively adjust according to the wind power, the original state can be recovered after the strong wind disappears, and the power transmission line, the device is simple in structure principle, low in installation and maintenance cost, capable of improving the stability of the power grid in the area with frequent strong wind environment, and has application prospects.
Drawings
Fig. 1 is a schematic structural view of a power transmission line protection device of the present invention;
FIG. 2 is a schematic diagram of the internal structure of the transmission assembly of the power transmission line protection device of the present invention
FIG. 3 is a schematic diagram of the internal structure of the transmission assembly of the power transmission line protection device of the present invention
Fig. 4 is a schematic view of the internal structure of a portion of the transmission line protection apparatus of the present invention;
fig. 5 is a schematic structural view of a power transmission line protection device adjustment assembly of the present invention;
fig. 6 is a schematic view of the internal structure of the power transmission line protection device adjustment assembly of the present invention;
fig. 7 is a schematic diagram of the power line protection apparatus of the present invention.
Detailed Description
The invention is described in detail below with reference to specific embodiments.
As shown in fig. 1, the power transmission line protection device of the present invention comprises a power assembly, a transmission assembly and a plurality of adjusting assemblies; the power assembly is used for acquiring power from wind by utilizing the stressed bowl in the using process, different torques are generated according to the wind strength, the torques are converted into acting forces of the racks 3c in the adjusting assembly on the power transmission lines 9e through the transmission assembly, different acting forces are generated on the power transmission lines 9e according to the wind strength, and a self-adaptive adjusting scheme is formed according to the principle.
As shown in fig. 1 and 4, the power assembly comprises a hollow connecting seat 1a, and a power rod 1b which is vertically downward is arranged at the lower end of the connecting seat 1 a; the wind-driven generator also comprises a plurality of wind-receiving bowls 1c, connecting rods 1d and a plurality of connecting rods, wherein the wind-receiving bowls 1c are of bowl-shaped structures and are arranged around the connecting seat 1a in an annular array mode, and the connecting seat 1a is connected with the wind-receiving bowls 1c through the connecting rods 1 d; the structure mainly used of power component is the rotary motion of connecting seat and power pole with the effect conversion of wind-force to the bowl that receives wind to transmit rotary motion to transmission assembly through the power pole, the bowl that receives wind that the array distributes can realize even atress, reduces the unbalanced moment of torsion that power component received, improves structural stability.
As shown in fig. 2 and 4, the transmission assembly includes a vertically disposed transmission rod 2a, the transmission rod 2a and the power rod 1b are coaxially opposite, the upper end of the transmission rod 2a and the lower end of the power rod 1b are connected to make the transmission rod 2a rotate with the power rod 1b, wherein the transmission rod and the power rod can be fixedly connected or movably connected according to different structures and different requirements, in this embodiment, in order to facilitate the use of different power assemblies (in order to replace wind receiving bowls and other structures with different sizes according to the instant wind power size), the transmission rod and the power rod are connected through a connection groove 9a, and a connection groove 9a and a connection strip 9b are respectively disposed at the contact end of the power rod and the transmission rod to facilitate quick connection or disconnection.
As shown in fig. 2 and 3, the transmission assembly further includes a hollow fixing seat 2b, a first mounting hole 2c is formed in the top of the fixing seat 2b, and the transmission rod 2a is inserted into the fixing seat 2b from the first mounting hole 2 c; a worm wheel and worm group is arranged in the fixed seat 2b, a worm 2d in the worm wheel and worm group is provided with a worm hole along the axis, and the lower end of the transmission rod 2a is inserted into the worm hole and connected with the worm 2 d; the worm 2d is vertically arranged, the axis of the turbine 2e is horizontally arranged, a shaft hole is formed in the axis of the turbine 2e, a transmission shaft 2f is arranged in the shaft hole, and the transmission shaft 2f synchronously rotates along with the turbine 2 e; the fixing seat 2b is composed of a box-packed structure with an opening at one side and a sealing cover 2m covering the opening, annular bearing tables 2n are respectively arranged on the end surface of the inner side of the sealing cover 2m and the surface of the inner wall of the fixing seat 2b opposite to the sealing cover 2m, and rolling bearings 2p are arranged in the two bearing tables 2 n. Set up antifriction bearing 2p and be favorable to reducing the friction between transmission shaft 2f and fixing base 2b, improve transmission shaft 2f transmission efficiency, improve the smooth and easy degree when the device uses.
As shown in fig. 3, the worm gear further comprises a fixing bolt 2g, the fixing bolt 2g comprises a section of threaded column, a first threaded hole is formed in the connecting seat 1a at a position corresponding to the lower end of the transmission rod 2a, the threaded column is screwed into the first threaded hole, a rotary column 2i is arranged at the upper end of the fixing bolt 2g, a rotary hole is formed in the lowest end of the transmission rod 2a, the rotary column 2i is inserted into the rotary hole, an adjusting ring 2h is arranged between the fixing bolt 2g and the connecting seat 1a, the upper end face of the adjusting ring 2h abuts against the lower end face of the worm 2d, and the lower end face of the adjusting ring 2h abuts; reinforcing cylinders 2j are arranged around the first mounting holes 2c on the outer end face of the fixed seat 2a, and the transmission rod 2a penetrates through the reinforcing cylinders 2j and extends into the connecting seat 1 a; the transmission rod 2a is provided with a shaft shoulder at the part inside the connecting seat 1a, the upper end surface of the shaft shoulder is propped against the upper surface of the inner cavity of the connecting seat 1a, and the lower end surface of the shaft shoulder is propped against the upper end surface of the worm 2 d. Set up and strengthen a section of thick bamboo 2j and make transfer line 2a keep vertical direction, improve transfer line 2a intensity, prevent the rupture, can utilize adjusting ring 2h to adjust the upper and lower position of worm 2d, be convenient for rectify the maintenance to turbine worm group, set up the dismouting maintenance of the turbine worm group of being convenient for of gim peg 2g structure.
Further, the transmission shaft 2f is connected with the turbine 2e through the metal key 2k and rotates synchronously, the turbine 2e and the transmission shaft 2f are both provided with key grooves 2l for installing the metal key 2k, wherein the key grooves 2l on the transmission shaft 2f extend along the axial direction to two sides so that the connecting seat 1a can slide along the transmission shaft 2 f. Set to slidable structure, be convenient for adjust connecting seat 1a and fixing base 2 b's relative mounted position as required in the installation, utilize the pole on cross arm or other structures the more suitable mounted position install, improve adaptability, prevent that the structure from being blockked and leading to unable use.
As shown in fig. 5 and 6, the adjusting assembly includes a hollow adjusting seat 3a, a gear rack set is disposed in the adjusting seat 3a, wherein a gear 3b is sleeved on a transmission shaft 2f and rotates synchronously with the transmission shaft 2f, a second mounting hole for the transmission shaft 2f to pass through is disposed on the adjusting seat 3a, and a rack 3c is disposed vertically; the rack 3c is provided with guide strips 3d distributed along the vertical direction, the adjusting seat 3a is correspondingly provided with guide grooves 3e distributed along the vertical direction, and the guide strips 3d slide along the guide grooves 3e to enable the rack 3c to move along the vertical direction.
The upper end and the lower end of the adjusting seat 3a are provided with openings for the racks 3c to penetrate out; one side of adjusting seat 3a dorsad connecting seat 1a is provided with the third mounting hole, is provided with end cover 3g in the third mounting hole, and one side that end cover 3g was towards adjusting the seat 3a inner chamber is provided with the constant head tank, and the corresponding bellied holding ring 3h that is provided with on the gear 3 b. Utilize holding ring 3h and constant head tank to make gear 3b keep the relatively fixed position in adjusting seat 3a for gear 3b rack 3c can the steady motion, reduces the structural complexity.
The lower end of the rack 3c is provided with a sliding hole; specifically, the lower extreme of rack 3c is the structure of falling the U-shaped, is provided with two gyro wheels 3f along vertical direction between the two arms of the structure of falling the U-shaped, and the slip hole is enclosed by two gyro wheels 3f and the two arms of the structure of falling the U-shaped, and electric wire netting power transmission line 9e sets up between two gyro wheels 3 f. In the use, need control power transmission line 9e through the sliding hole, in order to prevent power transmission line 9e wearing and tearing in the repeated use, set up the sliding hole into two gyro wheels 3f and two arm structures and constitute, use the roll to replace the slip, reduce the friction, reduce power transmission line 9e wearing and tearing, improve the smooth and easy nature of action.
The fixed seat 2b and the adjusting seat 3a are respectively provided with a fixed hole 9c and a fixed hole 9d so as to be fixed on a power grid foundation structure. For the convenience of installation, in this embodiment, the edges of the fixed seat and the adjusting seat are further provided with a connecting platform 9f for connection and fixation, and the fixing holes are arranged on the connecting platform 9f
As shown in fig. 7, the utility model also comprises a rotating wheel 4 arranged on the electric pole and a connecting point 5, the rotating wheel 4 and the connecting point 5 are respectively arranged at the front and the rear sides of the rack 3c, and the power line 9e is connected to the connecting point 5 after passing through the sliding hole after passing around the rotating wheel 4. As is readily known, the connection points are used for fixing the end of the transmission line and for electrically connecting to a subsequent transmission line, generally an insulator or the like on the pole.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. A power transmission line protection device is characterized by comprising a power assembly, a transmission assembly and a plurality of adjusting assemblies;
the power assembly comprises a hollow connecting seat, and a vertically downward power rod is arranged at the lower end of the connecting seat; the wind-receiving bowl is of a bowl-shaped structure and is arranged around the connecting seat in an annular array mode, and the wind-receiving bowl is connected with the connecting seat through the connecting rod;
the transmission assembly comprises a transmission rod which is vertically arranged, the transmission rod and the power rod are coaxially opposite, and the upper end of the transmission rod is connected with the lower end of the power rod so that the transmission rod rotates along with the power rod; the transmission rod is inserted into the fixed seat from the first mounting hole; a worm wheel and worm group is arranged in the fixed seat, a worm in the worm wheel and worm group is provided with a worm hole along the axis of the worm, and the lower end of the transmission rod is inserted into the worm hole and connected with the worm; the worm is vertically arranged, the axis of the turbine is horizontally arranged, a shaft hole is formed in the axis of the turbine, a transmission shaft is arranged in the shaft hole, and the transmission shaft synchronously rotates along with the turbine;
the adjusting assembly comprises a hollow adjusting seat, a gear rack group is arranged in the adjusting seat, a gear sleeve is arranged on the transmission shaft and synchronously rotates along with the transmission shaft, a second mounting hole for the transmission shaft to penetrate through is formed in the adjusting seat, and a rack is vertically arranged; the rack is provided with guide strips distributed along the vertical direction, the adjusting seat is correspondingly provided with guide grooves distributed along the vertical direction, and the guide strips slide along the guide grooves so that the rack can move along the vertical direction; the lower end of the rack is provided with a sliding hole;
the power transmission line is characterized by further comprising a rotating wheel and a connecting point, wherein the rotating wheel and the connecting point are arranged on the electric pole, the rotating wheel and the connecting point are respectively arranged on the front side and the rear side of the rack, and the power transmission line is connected to the connecting point through the sliding hole after bypassing the rotating wheel.
2. A power transmission line protection device according to claim 1, wherein said fixing base and said adjusting base are provided with fixing holes for fixing to a power grid infrastructure.
3. A power transmission line protection device according to claim 1, wherein the lower end of the rack is of an inverted U-shaped configuration, two rollers are vertically disposed between the two arms of the inverted U-shaped configuration, the sliding hole is defined by the two rollers and the two arms of the inverted U-shaped configuration, and the power transmission line is disposed between the two rollers.
4. The power transmission line protection device according to claim 1, further comprising a fixing bolt, wherein the fixing bolt comprises a section of a threaded post, the connecting seat is provided with a first threaded hole at a position corresponding to the lower end of the transmission rod, the threaded post is screwed into the first threaded hole, the upper end of the fixing bolt is provided with a rotating post, the lowest end of the transmission rod is provided with a rotating hole, the rotating post is inserted into the rotating hole, an adjusting ring is arranged between the worm and the connecting seat, the upper end surface of the adjusting ring abuts against the lower end surface of the worm, and the lower end surface of the adjusting ring abuts against the lower surface of the inner;
reinforcing cylinders are arranged around the first mounting holes on the outer end face of the fixing seat, and the transmission rod penetrates through the reinforcing cylinders and extends into the connecting seat; the transmission rod is provided with a shaft shoulder at the part inside the connecting seat, the upper end surface of the shaft shoulder is propped against the upper surface of the inner cavity of the connecting seat, and the lower end surface of the shaft shoulder is propped against the upper end surface of the worm.
5. A power transmission line protection device according to claim 1, wherein the upper and lower ends of the adjustment seat are provided with openings through which the racks pass; one side of the adjusting seat, which is back to the connecting seat, is provided with a third mounting hole, an end cover is arranged in the third mounting hole, one side of the end cover, which faces the inner cavity of the adjusting seat, is provided with a positioning groove, a corresponding raised positioning ring is arranged on the gear, and the positioning ring is inserted into the positioning groove.
6. A power transmission line protection device according to claim 1, wherein the drive shaft is connected to the worm gear via a metal key for synchronous rotation, and the worm gear and the drive shaft are provided with key slots for mounting the metal key, wherein the key slots on the drive shaft extend along the shaft body to both sides thereof so that the connecting base can slide along the drive shaft.
7. A protection device for power transmission lines according to claim 1, wherein said fixing base is composed of a box structure with an opening at one side and a cover covering the opening, the end surface of the inner side of the cover and the surface of the inner wall of the fixing base opposite to the cover are respectively provided with an annular bearing platform, and rolling bearings are arranged in the two bearing platforms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811062854.7A CN109066552B (en) | 2018-09-12 | 2018-09-12 | Power transmission line protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811062854.7A CN109066552B (en) | 2018-09-12 | 2018-09-12 | Power transmission line protection device |
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| Publication Number | Publication Date |
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| CN109066552A CN109066552A (en) | 2018-12-21 |
| CN109066552B true CN109066552B (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811062854.7A Active CN109066552B (en) | 2018-09-12 | 2018-09-12 | Power transmission line protection device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112269046B (en) * | 2020-10-15 | 2021-09-24 | 云南电网有限责任公司电力科学研究院 | Electric power gauge protection device |
| CN117691528B (en) * | 2024-02-02 | 2024-04-12 | 国网山东省电力公司菏泽市定陶区供电公司 | Cable tightening device for double-row cable installation |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100847357B1 (en) * | 2008-04-18 | 2008-07-21 | 이윤경 | Fixation structure for pole transformer of the hume-pipe |
| CN101764376A (en) * | 2008-11-11 | 2010-06-30 | 王芹 | Wire stretcher |
| CN205248745U (en) * | 2015-11-24 | 2016-05-18 | 国网山东茌平县供电公司 | Power transmission line straining device is prevented speeding to shake by electronic lead screw |
| CN205248751U (en) * | 2015-11-30 | 2016-05-18 | 国家电网公司 | Icing device is prevented to power transmission line |
| CN207835014U (en) * | 2018-01-07 | 2018-09-07 | 李鹏程 | A kind of power line tension device |
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2018
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| CN109066552A (en) | 2018-12-21 |
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