CN111404076A - Device and method for live replacement of wire clamp of extra-high voltage transmission line - Google Patents
Device and method for live replacement of wire clamp of extra-high voltage transmission line Download PDFInfo
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- CN111404076A CN111404076A CN202010229219.4A CN202010229219A CN111404076A CN 111404076 A CN111404076 A CN 111404076A CN 202010229219 A CN202010229219 A CN 202010229219A CN 111404076 A CN111404076 A CN 111404076A
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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
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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Abstract
The invention discloses a device and a method for replacing a wire clamp of an ultra-high voltage transmission line in a live mode, wherein the device comprises a connecting plate clamp, a support and an unloading assembly; the unloading assembly comprises a base, a movable rod and a lead connector, the lead connector is connected to one end of the movable rod, and the movable rod is coaxially arranged in the base and can axially reciprocate; the support is detachably connected to one side of the connecting plate card, and the unloading assembly is detachably connected with the support through the base; the device sets up in pairs, links to each other the board card through linking can dismantle and connect in the both sides that the wire links the board, and the wire connector links to each other with the wire, realizes load transfer through the motion of movable rod. All parts of the device can be detached; in actual operation, the connecting plate clamp and the support are firstly transferred to an on-line operator, and the unloading assembly is transported after assembly is completed, so that the weight of single transportation is reduced, and the labor intensity is reduced; the operation method is simple, the operation efficiency is high, the pressure born by the high-altitude live working personnel during operation is reduced, and the operation safety is improved.
Description
Technical Field
The invention belongs to the technical field of operation and maintenance of an ultra-high voltage transmission line, and particularly relates to a device and a method for replacing a wire clamp of the ultra-high voltage transmission line in a live manner.
Background
The ultra-high voltage transmission refers to the transmission technology of alternating current 1000kV or more and direct current plus-minus 800kV or more, and has very important significance for the national conditions of large-scale energy allocation and trans-regional power supply in China, especially for the areas with power energy shortage, such as the middle east province and the like. The extra-high voltage live working can be carried out to ensure that the defects can be eliminated in time when the line has defects or even faults, ensure the reliable operation of the extra-high voltage transmission line and provide a solid energy guarantee for the development of the economy and the society.
The live-wire clamp replacement is common live-wire work of production line live-wire work teams and groups, but the ultra-high voltage transmission line has the characteristics of high field intensity and heavy load, the traditional tool for replacing the clamp of the transmission line has large volume and heavy weight, the operation method is also complex, the operation amount is large, the operation intensity is high, the operation efficiency is low, and the high-altitude live-wire workers are stressed physiologically and psychologically and are not beneficial to safety production.
Disclosure of Invention
The invention aims to provide a device and a method for replacing a wire clamp of an ultra-high voltage transmission line in an electrified way, which are light, convenient and efficient, aiming at the defects in the prior art.
The invention provides a device for replacing a wire clamp of an ultra-high voltage transmission line in a live manner, which comprises a connecting plate clamp, a support and an unloading assembly; the unloading assembly comprises a base, a movable rod and a lead connector, the lead connector is connected to one end of the movable rod, and the movable rod is coaxially arranged in the base and can axially reciprocate; the support is detachably connected to one side of the connecting plate card, and the unloading assembly is detachably connected with the support through the base; the device sets up in pairs, links to each other the board card through linking can dismantle and connect in the both sides that the wire links the board, and the wire connector links to each other with the wire, realizes load transfer through the motion of movable rod.
In a specific embodiment, the connecting board card is an L-type card, the inner ends of the vertical section and the horizontal section of the connecting board card are respectively provided with a group of bracket mounting holes, the outer end of the horizontal section of the connecting board card.
Preferably, the bracket comprises a support seat, a support ring and a locking fuse; the support is a T-shaped support, and the head of the support is provided with a threaded hole matched with the support mounting hole; the inner cavity of the support ring is an elliptical cavity, grooves are formed in two ends of a short shaft on the entity of the support ring, and threaded holes are formed in the position, corresponding to the grooves, of the entity along the thickness direction; the shutting insurance is the metal strip, and the both ends of shutting insurance inlay in the recess and lock through the bolt that twists in the screw hole.
The base is an elliptical ring seat, and the inner wall of the base is provided with threads; the movable rod is a threaded rod, one end of the movable rod is provided with a connecting hole, a ratchet wrench is arranged outside the movable rod, and the movable rod is connected in the base in a threaded mode.
In one embodiment, for facilitating the unloading, the wire connector is a hook, and one end of the wire connector is provided with a through hole; is connected with the movable rod through a fastener penetrating through the through hole and the connecting hole
Preferably, the wire connector and the ratchet wrench are respectively positioned on two sides of the base.
The invention also provides a method for replacing the wire clamp of the ultra-high voltage transmission line in a live mode, which is suitable for replacing the wire clamp on the outer side and the lower side, and the method uses the device as a tool and comprises the following steps:
step 5, the equipotential electrician assembles the unloading assembly into a corresponding support by using the base of the unloading assembly, enables the lifting hooks to face downwards, enables the opening directions of the lifting hooks to be opposite to each other, enables the lifting hooks to hook the lead and well opens a support ring locking safety;
step 6, the live working personnel operate the ratchet wrench to tighten the threaded rod, the operating frequencies of the symmetrical ratchet wrenches are the same, and the lifting hook bears the weight of the old wire clamp and loosens;
step 7, the live working personnel takes down the old wire clamp, operates the ratchet wrench to loosen the threaded rod after replacing the old wire clamp with a new qualified wire clamp, unloads the lifting hook gradually, and bears the new wire clamp gradually until the lifting hook is loosened and can be taken out;
and 8, sequentially removing the lifting hook, the threaded rod, the support and the connecting plate clamp by the live working personnel, matching the lifting hook, the threaded rod, the support and the connecting plate clamp with ground personnel, transmitting the lifting hook, the threaded rod, the support and the connecting plate clamp to the ground, and lowering the live working personnel to the tower to complete the task of replacing the wire clamp in a live manner.
Alternatively, in another embodiment, the wire connector is an annular lock catch, and the inner end of the wire connector is provided with a mounting hole, and the wire connector is connected with the movable rod through a fastener which sequentially passes through the mounting hole and the connecting hole.
Furthermore, the wire connector and the ratchet wrench are located on the same side of the base.
The invention also provides a method for replacing the wire clamp of the ultra-high voltage transmission line in a live mode, which is suitable for replacing the wire clamp on the upper side, uses the device in the alternative scheme as a tool, and comprises the following steps:
step 5, assembling the unloading assembly in a corresponding support by an equipotential person through a base of the unloading assembly, enabling the support ring to face upwards to enable the support ring to grasp the lead and well lock a locking safety;
step 6, the equipotential electrician operates the ratchet wrench to tighten the threaded rod, the operating frequencies of the symmetrical ratchet wrenches are the same, and the lifting hook bears the weight of the old wire clamp and loosens;
step 7, the equipotential electrician takes down the old wire clamp, operates the ratchet wrench to loosen the threaded rod after replacing the new qualified wire clamp, the hook unloads gradually, the new wire clamp bears gradually until the hook loosens and can be taken out;
and 8, the equipotential electrician sequentially detaches the lifting hook, the threaded rod, the bracket and the connecting plate clamp, cooperates with ground personnel to transfer the detached lifting hook, the threaded rod, the bracket and the connecting plate clamp to the ground, and the live-line worker goes down the tower to complete the task of replacing the wire clamp in a live-line manner.
The invention designs the connection among all parts of the device as detachable connection, thereby reducing the dead weight and volume of a single part and simplifying the structure of all parts; in actual operation, the connecting plate clamp and the support are firstly transferred to an on-line operator, and the component and the wire connecting plate are assembled and then the unloading component is transported, so that the weight in single transportation and single assembly is further reduced, and the labor intensity is reduced; the loading and unloading process is simple and convenient, the bearing and unloading method is simple, the workload is reduced, the operation efficiency is improved, the pressure born by the high-altitude live working personnel during operation is reduced, and the operation safety is improved.
Drawings
Fig. 1 is a schematic front view of a usage status of a first preferred embodiment of the present invention.
Fig. 2 is a schematic enlarged side view of the first preferred embodiment in a use state.
Fig. 3 is a schematic enlarged front view of a link card in the first preferred embodiment.
Fig. 4 is a front enlarged view of the stand according to the first preferred embodiment.
FIG. 5 is an enlarged, front view of the unloading assembly in the first preferred embodiment.
Fig. 6 is a schematic front view of a second preferred embodiment of the present invention in a use state.
Fig. 7 is a front enlarged view of the unloading assembly ii in the second preferred embodiment.
Sequence numbers of the drawings:
1-connecting plate clamp, 11-A group of bracket mounting holes, 12-B group of bracket mounting holes and 13-connecting plate clamp mounting holes;
2-bracket, 21-support ring, 22-support, 23-locking safety;
3-unloading component, 31-base, 32-movable rod, 33-hook, 34-ratchet wrench;
4-connecting the wires;
03-unloading assembly ii, 033-annular lock.
Detailed Description
In a first preferred embodiment, as shown in fig. 1 and fig. 2, the device for hot-line replacement of the conductor clamp of the ultra-high voltage transmission line disclosed in this embodiment is suitable for replacing the conductor clamp on the outer side and the lower side, and comprises a connecting plate clamp 1, a support 2 and an unloading assembly 3; the device is arranged in pairs and is respectively arranged at two sides of the wire connecting plate 4.
As shown in FIG. 3, the connecting plate card 1 is of an approximate L-shaped structure, three groups of bolt holes are formed in the connecting plate card, the three groups of bolt holes are respectively an A group of support mounting holes 11, a B group of support mounting holes 12 and a group of connecting plate card mounting holes 13, the A group of support mounting holes 11 are arranged in a rectangular mode and are located at the upper portion of the vertical section, the B group of support mounting holes 12 are identical to the A group of support mounting holes 11 in size and arrangement mode and are located on the left side of the horizontal section, the connecting plate card mounting holes 13 are arranged in a trapezoidal mode and are located at the outer end of the bottom of the horizontal section, a groove is formed in the edge above the connecting plate card mounting holes 13 and is used for enabling a flat plate card groove portion to be tightly attached to a reinforcing protruding portion of an extra-high voltage connecting plate when the extra-high voltage connecting plate is of a reinforcing type, the connecting plate card is matched with the connecting plate card in a concave-convex mode and ensures that the connecting plate card is tightly connected with the.
As shown in fig. 4, the holder 2 comprises two parts, a support ring 21 and a seat 22, the support ring being cast integrally with the base. The support ring 21 is oval, the inner cavity of the support ring is an oval cavity, grooves are formed in two ends of a short shaft of the support ring, and threaded holes are formed in the positions, corresponding to the grooves, of the support ring in the thickness direction; the locking fuse 23 is a metal strip, and two ends of the locking fuse are embedded in the grooves and locked by bolts screwed into the threaded holes. The elliptical ring seat is prevented from sliding out in the stress process of the lead screw. The support 22 is a T-shaped base, four support fixing bolt holes are reserved at the bottom end of the support, the support fixing bolt holes are matched with support mounting holes in the connecting plate clamp 1, and the support is connected with the connecting plate clamp 1 through bolts. The unloading assembly 3 is mounted in the support ring 21 and is prevented from falling off by a locking safety 23.
As shown in fig. 5, the unloading assembly 3 comprises a base 31, a movable lever 32, a wire connector and a ratchet wrench 34; the base 31 is an elliptical ring seat, and the inner wall of the base is provided with threads; the movable rod 32 is a threaded rod, one end of which is provided with a connecting hole, and the movable rod is connected in the base in a threaded manner; the wire connector is a lifting hook 33, one end of the wire connector is provided with a through hole, and the wire connector is connected with the movable rod through a fastener penetrating through the through hole and the connecting hole; ratchet wrenches 34 are attached to the outside of the movable bar and the hooks are located on either side of the base to ensure the travel of the movable bar. The unloading assembly 3 is embedded in the supporting ring by a base 31 and is prevented from falling off by a locking safety limiting position.
The connecting plate clamp, the bracket, the movable rod and the bolt are all made of high-strength steel; the lead connector is made of titanium alloy material so as to ensure the strength and reduce the self weight.
Taking the six-bundle extra-high voltage transmission conductor to replace the outer conductor clamp as an example, the method is carried out according to the following steps when the conductor clamp of the extra-high voltage transmission line is replaced in an electrified way by applying the embodiment:
step 5, the equipotential electrician assembles the unloading assembly into a corresponding support by using the base of the unloading assembly, enables the lifting hooks to face downwards, enables the opening directions of the lifting hooks to be opposite to each other, enables the lifting hooks to hook the lead and well opens a support ring locking safety;
step 6, the live working personnel operate the ratchet wrench to tighten the threaded rod, the operating frequencies of the symmetrical ratchet wrenches are the same, and the lifting hook bears the weight of the old wire clamp and loosens;
step 7, the live working personnel takes down the old wire clamp, operates the ratchet wrench to loosen the threaded rod after replacing the old wire clamp with a new qualified wire clamp, unloads the lifting hook gradually, and bears the new wire clamp gradually until the lifting hook is loosened and can be taken out;
and 8, sequentially removing the lifting hook, the threaded rod, the support and the connecting plate clamp by the live working personnel, matching the lifting hook, the threaded rod, the support and the connecting plate clamp with ground personnel, transmitting the lifting hook, the threaded rod, the support and the connecting plate clamp to the ground, and lowering the live working personnel to the tower to complete the task of replacing the wire clamp in a live manner.
The second preferred embodiment is suitable for replacing the wire clamp on the upper side, as shown in fig. 6 and 7, the difference between the second preferred embodiment and the first preferred embodiment is that: the lead connector in the unloading assembly II 03 is designed as an annular lock catch 033, the inner end of which is provided with a mounting hole, and the lead connector is connected with the movable rod through a fastener which sequentially penetrates through the mounting hole and the connecting hole; and the wire connector and the ratchet wrench are arranged on the same side of the base so as to ensure the stroke of the movable rod.
Take six divisions of extra-high voltage transmission wire to change upside wire clamp as an example, the step of applying this embodiment to change extra-high voltage transmission line wire clamp with electricity is:
step 5, assembling the unloading assembly in a corresponding support by an equipotential person through a base of the unloading assembly, enabling the support ring to face upwards to enable the support ring to grasp the lead and well lock a locking safety;
step 6, the equipotential electrician operates the ratchet wrench to tighten the threaded rod, the operating frequencies of the symmetrical ratchet wrenches are the same, and the lifting hook bears the weight of the old wire clamp and loosens;
step 7, the equipotential electrician takes down the old wire clamp, operates the ratchet wrench to loosen the threaded rod after replacing the new qualified wire clamp, the hook unloads gradually, the new wire clamp bears gradually until the hook loosens and can be taken out;
and 8, the equipotential electrician sequentially detaches the lifting hook, the threaded rod, the bracket and the connecting plate clamp, cooperates with ground personnel to transfer the detached lifting hook, the threaded rod, the bracket and the connecting plate clamp to the ground, and the live-line worker goes down the tower to complete the task of replacing the wire clamp in a live-line manner.
The components are detachably connected, so that the dead weight and the volume of a single component are reduced, and the structures of the components are simplified; in actual operation, the connecting plate clamp and the support are firstly transferred to an on-line operator, and the component and the wire connecting plate are assembled and then the unloading component is transported, so that the weight in single transportation and single assembly is further reduced, and the labor intensity is reduced; the loading and unloading process is simple and convenient, the bearing and unloading method is simple, the workload is reduced, the operation efficiency is improved, the pressure born by the high-altitude live working personnel during operation is reduced, and the operation safety is improved.
Claims (10)
1. The utility model provides a device of change special high tension transmission line wire clamp with electricity which characterized in that: the device comprises a connecting plate clamp, a support and an unloading assembly;
the unloading assembly comprises a base, a movable rod and a lead connector, the lead connector is connected to one end of the movable rod, and the movable rod is coaxially arranged in the base and can axially reciprocate;
the support is detachably connected to one side of the connecting plate card, and the unloading assembly is detachably connected with the support through the base;
the device sets up in pairs, links to each other the board card through linking can dismantle and connect in the both sides that the wire links the board, and the wire connector links to each other with the wire, realizes load transfer through the motion of movable rod.
2. The device for hot-line replacement of the wire clamp of the extra-high voltage transmission line according to claim 1, wherein the connecting plate clamp is an L-type clamp, the inner ends of the vertical section and the horizontal section of the connecting plate clamp are respectively provided with a group of support mounting holes, the outer end of the horizontal section of the connecting plate clamp is provided with a group of connecting plate clamp mounting holes, and the top surface of the horizontal section is provided with a groove at the center of the group of connecting plate clamp mounting holes.
3. The device for live replacement of the wire clamp of the extra-high voltage transmission line according to claim 2, characterized in that: the bracket comprises a support seat, a support ring and a locking safety catch; the support is a T-shaped support, and the head of the support is provided with a threaded hole matched with the support mounting hole; the inner cavity of the support ring is an elliptical cavity, grooves are formed in two ends of a short shaft on the entity of the support ring, and threaded holes are formed in the position, corresponding to the grooves, of the entity along the thickness direction; the shutting insurance is the metal strip, and the both ends of shutting insurance inlay in the recess and lock through the bolt that twists in the screw hole.
4. The device of claim 3 for live replacement of the wire clamp of the extra-high voltage transmission line, characterized in that: the base is an elliptical ring seat, and the inner wall of the base is provided with threads; the movable rod is a threaded rod, one end of the movable rod is provided with a connecting hole, a ratchet wrench is arranged outside the movable rod, and the movable rod is connected in the base in a threaded mode.
5. The device of claim 4 for live replacement of the wire clamp of the extra-high voltage transmission line, characterized in that: the wire connecting head is a lifting hook, and a through hole is formed in one end part of the wire connecting head; and the movable rod is connected with the fastening piece passing through the through hole and the connecting hole.
6. The device of claim 5 for live replacement of the wire clamp of the extra-high voltage transmission line, characterized in that: the wire connector and the ratchet wrench are respectively positioned on two sides of the base.
7. A method for replacing wire clamps of an extra-high voltage transmission line in a charged manner, which is suitable for replacing wire clamps on the outer side and the lower side, is characterized in that the method uses the device in claim 5 or 6 as a tool and comprises the following steps:
step 1, a ground potential electrician carries an insulation pulley and an insulation transfer rope to reach a ground potential operation position, then an equipotential person enters an electric field, the ground potential electrician hangs the insulation pulley at a proper position, and the ground electrician sequentially transfers one of a pair of connecting board cards and a support to the equipotential electrician through the insulation pulley and the insulation transfer rope;
step 2, fixing the connecting plate clamp and the support on one side of the conducting wire connecting plate through bolts by the equipotential electrician, wherein the groove of the connecting plate clamp faces upwards;
step 3, the ground electrician transfers the other auxiliary connecting board card and the bracket to the equipotential electrician, and the equipotential electrician symmetrically fixes the other side of the connecting board through bolts;
step 4, the ground electrician sequentially transmits the unloading assembly and the new qualified wire clamp to the live working personnel through the pulley and the insulated transmission rope;
step 5, the equipotential electrician assembles the unloading assembly into a corresponding support by using the base of the unloading assembly, enables the lifting hooks to face downwards, enables the opening directions of the lifting hooks to be opposite to each other, enables the lifting hooks to hook the lead and well opens a support ring locking safety;
step 6, the live working personnel operate the ratchet wrench to tighten the threaded rod, the operating frequencies of the symmetrical ratchet wrenches are the same, and the lifting hook bears the weight of the old wire clamp and loosens;
step 7, the live working personnel takes down the old wire clamp, operates the ratchet wrench to loosen the threaded rod after replacing the old wire clamp with a new qualified wire clamp, unloads the lifting hook gradually, and bears the new wire clamp gradually until the lifting hook is loosened and can be taken out;
and 8, sequentially removing the lifting hook, the threaded rod, the support and the connecting plate clamp by the live working personnel, matching the lifting hook, the threaded rod, the support and the connecting plate clamp with ground personnel, transmitting the lifting hook, the threaded rod, the support and the connecting plate clamp to the ground, and lowering the live working personnel to the tower to complete the task of replacing the wire clamp in a live manner.
8. The device of claim 4 for live replacement of the wire clamp of the extra-high voltage transmission line, characterized in that: the wire connector is an annular lock catch, a mounting hole is formed in the inner end of the wire connector, and the wire connector is connected with the movable rod through a fastener which sequentially penetrates through the mounting hole and the connecting hole.
9. The device of claim 8 for live replacement of the wire clamp of the ultra-high voltage transmission line, characterized in that: the wire connector and the ratchet wrench are located on the same side of the base.
10. A method for replacing a wire clamp of an extra-high voltage transmission line in a charged manner, which is suitable for replacing the wire clamp on the upper side, is characterized in that the method uses the device in claim 8 or 9 as a tool, and comprises the following steps:
step 1, a ground potential electrician carries an insulation pulley and an insulation transfer rope to reach a ground potential operation position, then an equipotential person enters an electric field, the ground potential electrician hangs the insulation pulley at a proper position, and the ground electrician sequentially transfers one of a pair of connecting board cards and a support to the equipotential electrician through the insulation pulley and the insulation transfer rope;
step 2, fixing the connecting plate clamp and the support on one side of the conducting wire connecting plate through bolts by the equipotential electrician, wherein the groove of the connecting plate clamp faces upwards;
step 3, the ground electrician transfers the other auxiliary connecting board card and the bracket to the equipotential electrician, and the equipotential electrician symmetrically fixes the other side of the connecting board through bolts;
step 4, the ground electrician sequentially transmits the unloading assembly and the new qualified wire clamp to the live working personnel through the pulley and the insulated transmission rope;
step 5, assembling the unloading assembly in a corresponding support by an equipotential person through a base of the unloading assembly, enabling the support ring to face upwards to enable the support ring to grasp the lead and well lock a locking safety;
step 6, the equipotential electrician operates the ratchet wrench to tighten the threaded rod, the operating frequencies of the symmetrical ratchet wrenches are the same, and the lifting hook bears the weight of the old wire clamp and loosens;
step 7, the equipotential electrician takes down the old wire clamp, operates the ratchet wrench to loosen the threaded rod after replacing the new qualified wire clamp, the hook unloads gradually, the new wire clamp bears gradually until the hook loosens and can be taken out;
and 8, the equipotential electrician sequentially detaches the lifting hook, the threaded rod, the bracket and the connecting plate clamp, cooperates with ground personnel to transfer the detached lifting hook, the threaded rod, the bracket and the connecting plate clamp to the ground, and the live-line worker goes down the tower to complete the task of replacing the wire clamp in a live-line manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010229219.4A CN111404076B (en) | 2020-03-27 | 2020-03-27 | Device and method for live replacement of wire clamp of extra-high voltage transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010229219.4A CN111404076B (en) | 2020-03-27 | 2020-03-27 | Device and method for live replacement of wire clamp of extra-high voltage transmission line |
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| Publication Number | Publication Date |
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| CN111404076A true CN111404076A (en) | 2020-07-10 |
| CN111404076B CN111404076B (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010229219.4A Active CN111404076B (en) | 2020-03-27 | 2020-03-27 | Device and method for live replacement of wire clamp of extra-high voltage transmission line |
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| CN (1) | CN111404076B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114142390A (en) * | 2021-11-08 | 2022-03-04 | 广西电网有限责任公司贺州供电局 | Anti-drop formula coaster |
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| CN209675822U (en) * | 2019-04-11 | 2019-11-22 | 国网山东省电力公司菏泽供电公司 | Overhead-groundwire lifter |
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| JPH07322436A (en) * | 1994-05-20 | 1995-12-08 | Fujikura Ltd | Electric wire suspending tool |
| CN206076838U (en) * | 2016-09-28 | 2017-04-05 | 国网四川省电力公司检修公司 | A kind of 500kV transmission pressures overhanging golden tool more changing device |
| CN206834613U (en) * | 2017-06-07 | 2018-01-02 | 国网湖南省电力公司带电作业中心 | Extra high voltage line carbon fiber machete card |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114142390A (en) * | 2021-11-08 | 2022-03-04 | 广西电网有限责任公司贺州供电局 | Anti-drop formula coaster |
| CN114142390B (en) * | 2021-11-08 | 2023-09-15 | 广西电网有限责任公司贺州供电局 | Anti-drop pulley |
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| Publication number | Publication date |
|---|---|
| CN111404076B (en) | 2021-07-23 |
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