CN111541054A - Efficient hot-line work groove-combining lap joint device and operation method thereof - Google Patents

Efficient hot-line work groove-combining lap joint device and operation method thereof Download PDF

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Publication number
CN111541054A
CN111541054A CN202010403630.9A CN202010403630A CN111541054A CN 111541054 A CN111541054 A CN 111541054A CN 202010403630 A CN202010403630 A CN 202010403630A CN 111541054 A CN111541054 A CN 111541054A
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CN
China
Prior art keywords
fastener
plate
wire
wire clamp
positioning plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010403630.9A
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Chinese (zh)
Inventor
潘忠庆
方茂勇
潘家兵
刘子琨
田昆
潘云昌
杨通和
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Guizhou Power Grid Co Ltd
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Guizhou Power Grid Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Guizhou Power Grid Co Ltd filed Critical Guizhou Power Grid Co Ltd
Priority to CN202010403630.9A priority Critical patent/CN111541054A/en
Publication of CN111541054A publication Critical patent/CN111541054A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/12End pieces terminating in an eye, hook, or fork
    • H01R11/14End pieces terminating in an eye, hook, or fork the hook being adapted for hanging on overhead or other suspended lines, e.g. hot line clamp
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28Clamped connections, spring connections
    • H01R4/38Clamped connections, spring connections utilising a clamping member acted on by screw or nut
    • H01R4/44Clamping areas on both sides of screw
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/027Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for connecting conductors by clips
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/14Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electric Cable Installation (AREA)

Abstract

The invention discloses a high-efficiency hot-line work groove lapping device and an operation method thereof, and the device comprises two wire clamps, wherein each wire clamp comprises an upper wire clamp and a lower wire clamp, the upper wire clamp and the lower wire clamp are connected through a bolt, the upper wire clamp is positioned in two left and right square holes on a positioning plate, the positioning plate is fixedly connected with the side wall of a screw sleeve through a back plate, a supporting plate capable of sliding up and down relatively is arranged between the positioning plate and the back plate, two ends of the supporting plate are fixedly connected with the outer wall of a bearing, a screw rod is arranged in the screw sleeve, the screw rod penetrates through the bearing and is fixedly connected with the inner ring of the bearing, the bottom end of the screw rod is connected with an insulating rod. The device can be used for conveniently and quickly carrying out the electrified lap joint operation without power failure, and has the advantages of simple structure, light weight and convenient carrying.

Description

Efficient hot-line work groove-combining lap joint device and operation method thereof
Technical Field
The invention relates to a ditch combining device, in particular to a ditch combining lap joint device for efficient hot-line work and an operation method thereof, and belongs to the technical field of maintenance and operation of electrical equipment.
Background
With the increasing demand of common people for the well-developed electric power, the urgent need for improvement of the operator environment is high, the high requirement for the power supply reliability is provided, and the vigorous development of the live working for improving the power supply reliability is a mode widely adopted by the current power supply enterprises. Due to the adoption of live working, the number of users lost due to power failure is greatly reduced, and the electricity utilization satisfaction of common people is improved. In the live-wire work, a large number of conducting wire and groove live-wire lap joints are needed, so that the significance of improving the benefit and efficiency of conducting wire and groove live-wire lap joints is great.
The live-line work staff can find a simple, convenient and quick live-line wire and groove lapping device urgently, so that the labor intensity is greatly reduced, and the working efficiency is improved. It is also desirable that the splicer be capable of handling wire splices of various wire diameters and is adaptable to various parallel groove splices.
The groove lapping device is an important tool for high-voltage live working and is the most common working tool for live working personnel, but the existing lapping device has the problems of various types, various models, inconvenient use, heaviness, incapability of processing different wire diameters, different groove parallel clamps and the like, so that the lapping quality is low, the lapping efficiency is low, the working personnel are unwilling to use, and in addition, the existing lapping device has the defects of complex structure, higher cost and inconvenient popularization.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a high-efficient live working and ditch overlap joint ware and operation method thereof, through fixing the fastener in the locating plate, the locating plate can be followed the backup pad and slided from top to bottom, be equipped with the otic placode below the backup pad, the otic placode is used for the chucking drainage wire, hang the fastener on overhead conductor again, reuse nut sleeve fastens the fastener, can take off the overlap joint ware, utilize this instrument can convenient and fast develop electrified and ditch overlap joint operation, need not have a power failure again, and this device simple structure, light in weight, high portability, the effectual problem that has solved the aforesaid existence.
The technical scheme of the invention is as follows: the utility model provides a high-efficient live working and ditch overlap joint ware, it includes two fastener, and the fastener includes fastener and lower fastener, and the fastener passes through bolted connection with lower fastener, it is located two square holes about on the locating plate to go up the fastener, and the locating plate passes through backplate and swivel nut lateral wall fixed connection, is equipped with relative gliding backup pad from top to bottom between locating plate and the backplate, backup pad both ends fixed connection bearing outer wall, has the screw rod in the swivel nut, the screw rod pass the bearing and with bearing inner race fixed connection, the insulator spindle is connected through the connecting piece in the screw rod bottom, backup pad bottom side fixed connection otic placode, the drainage line is located the otic placode and passes in the fastener.
The positioning plate is horizontally arranged and is perpendicular to the back plate and the supporting plate, a through hole through which the supporting plate penetrates is formed in the positioning plate, and the positioning plate can slide up and down along the supporting plate through the through hole.
The top end face of the bolt is located below the limiting plate, a connecting rod is fixedly connected between the inclined rods, and the supporting plate is located in a gap between the connecting rod and the back plate.
The outer side wall of the threaded sleeve is fixedly connected with a hook.
The otic placode is three and even vertical arranging, and two lower coil clamps are located between the otic placode.
The bottom lateral wall of the supporting plate is provided with a spring, the other end of the spring is connected with a V-shaped hook, the V-shaped hook is hooked on the outer edge of the top of the lower wire clamp, and a gap for hanging an overhead conductor is arranged between the lower wire clamp and the upper wire clamp.
An operation method of a high-efficiency hot-line work trench-combining lapping device comprises the following steps:
firstly, peeling off the insulation skin at the end part of the drainage wire, inserting the insulation skin into a groove at the inner side between two upper wire clamps and a lower wire clamp, and then connecting the bolt and the loop without tightly twisting;
inserting the two upper wire clamps into square holes in the positioning plate, positioning the top end of the bolt through the limiting plate, and placing the drainage wire on the lug plate;
thirdly, hooking the V-shaped hook on the outer edge of the lower wire clamp to ensure that the gap of the gap between the upper wire clamp and the outer side of the lower wire clamp is larger than the diameter of the overhead conductor to be lapped;
fourthly, two persons climb the tower for operation, one person holds the device with the drainage wire on the insulating rod, the device is hung on the overhead conductor to be lapped through the gap and is held tightly, the other person holds the insulating rod with the nut sleeve, the V-shaped hook is firstly pulled out from the lower wire clamp, and the nut matched with the bolt is screwed tightly by the nut sleeve;
fifthly, the threaded sleeve, the back plate and the positioning plate move upwards through the reverse rotation screw rod, the wire clamp and the drainage wire are fixed on the overhead conductor, the positioning plate can be taken down from the upper wire clamp, and the live-line lap joint operation is completed.
The invention has the beneficial effects that: compared with the prior art, by adopting the technical scheme, the cable clamp is fixed in the positioning plate, the positioning plate can slide up and down along the supporting plate, the lug plate is arranged below the supporting plate and used for clamping the drainage cable, then the cable clamp is hung on the overhead conductor, and the cable clamp is fastened by using the nut sleeve, so that the lap-joint device can be taken down; the lap joint device is small in size, convenient and quick to use, labor-saving and time-saving. Generally, the working time is saved by 65% compared with the traditional lapping method, the parallel groove lapping can be carried out on the wires with different wire diameters and the parallel groove clamps with different types and models, and the application range is wide. This research and development is put forth effort and is promoted overlap joint ware to the commonality and the suitability of equipment fastener, has improved lapped firm degree, and the overlap joint will stand heavy load current's examination more easily simultaneously, for transmission line's safe operation, improves the power supply reliability, has gained fine result of use.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a left side view of the present invention;
fig. 3 is a right side view of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Example 1: as shown in the attached drawings 1-3, the efficient hot-line work groove lapping device comprises two wire clamps, each wire clamp comprises an upper wire clamp 17 and a lower wire clamp 20, the upper wire clamp 17 and the lower wire clamp 20 are connected through a bolt 22, the upper wire clamp 17 is positioned in two left and right square holes 13 on a positioning plate 16, the positioning plate 16 is fixedly connected with the side wall of a threaded sleeve 6 through a back plate 8, a supporting plate 5 capable of sliding up and down relatively is arranged between the positioning plate 16 and the back plate 8, the outer wall of a bearing 3 is fixedly connected with the two ends of the supporting plate 5, a screw rod 4 is arranged in the threaded sleeve 6, the screw rod 4 penetrates through the bearing 3 and is fixedly connected with the inner ring of the bearing 3, the bottom end of the screw rod 4 is connected with an insulating rod 29 through a connecting piece 1, the lug plate 24 is fixedly.
Further, the positioning plate 16 is horizontally arranged and perpendicular to the back plate 8 and the supporting plate 5, a through hole 2 through which the supporting plate 5 passes is formed in the positioning plate 16, and the positioning plate 16 can slide up and down along the supporting plate 5 through the through hole 2. The screw rod 4 is driven to rotate through the rotary insulating rod 29, the threaded sleeve 6 can move up and down, the positioning plate 16 is driven to move up and down, the drainage wire 5 can be clamped to the lug plate 24 when the positioning plate moves down, the device can be taken down from the overhead conductor when the positioning plate moves up, and the wire clamp is reserved on the overhead conductor.
The safety of operators can be ensured during live working, and the insulating rod 29 can be used when rotating forwards and backwards, so that the phenomenon of looseness cannot occur.
Further, an inclined rod 10 is fixedly connected between the top end of the back plate 8 and the side end of the positioning plate 16), a horizontally arranged limiting plate 15 is fixedly connected between the lower portions of the inclined rods 10, the top end face of the bolt 22 is located below the limiting plate 15, a connecting rod 11 is fixedly connected between the inclined rods 10, and the supporting plate 5 is located in a gap between the connecting rod 11 and the back plate 8.
Further, the outer side wall of the threaded sleeve 6 is fixedly connected with a hook 7. The device can be hung on a tower through the hook 7, so that the field operation is convenient.
Further, the ear plates 24 are three and evenly vertically arranged, and the two lower wire clamps 20 are positioned between the ear plates 24.
Further, a spring 21 is arranged on the side wall of the bottom of the supporting plate 5, the other end of the spring 21 is connected with a V-shaped hook 19, the V-shaped hook 19 is hooked on the outer edge of the top of the lower wire clamp 20, and a gap 18 for hanging an overhead conductor is arranged between the lower wire clamp 20 and the upper wire clamp 17. When the cable is not hung on the overhead conductor, the lower clamp 20 is hooked by the V-shaped hook 19, so that the gap 18 between the lower clamp 20 and the upper clamp 17 is in an open state, and the cable is conveniently hung on the overhead conductor.
An operation method of a high-efficiency hot-line work trench-combining lapping device comprises the following steps:
firstly, peeling off the insulating skin at the end part of the drainage wire 9, inserting the end part of the drainage wire into a groove at the inner side between the two upper wire clamps 17 and the lower wire clamp 20, and then, connecting the bolts 22 in a looping way without screwing tightly;
secondly, inserting the two upper wire clamps 17 into the square holes 13 on the positioning plate 16, positioning the top ends of the bolts 22 through the limiting plates 15, and placing the drainage wires 9 on the lug plates 24;
thirdly, hooking the V-shaped hook 19 on the outer edge of the lower wire clamp 20 to ensure that the gap 18 between the upper wire clamp 17 and the outer side of the lower wire clamp 20 is larger than the diameter of the overhead conductor to be lapped;
fourthly, two persons climb the tower to operate, one person holds the device with the drainage wire 9 on the insulating rod 29, hangs the device on the overhead conductor to be lapped through the gap 18 and grips the overhead conductor, the other person holds the insulating rod with the nut sleeve, the V-shaped hook 19 is firstly pulled off from the lower clamp 20, and the nut matched with the bolt 22 is screwed tightly by the nut sleeve;
fifthly, the threaded sleeve 6, the back plate 8 and the positioning plate 16 move upwards by reversely rotating the screw rod 4, the wire clamp and the drainage wire 9 are fixed on the overhead conductor, the positioning plate 16 can be taken down from the upper wire clamp 17, and the live lapping operation is completed.
The cable clamp is fixed in the positioning plate, the positioning plate can slide up and down along the supporting plate, the lug plate is arranged below the supporting plate and used for clamping a drainage cable, the cable clamp is hung on an overhead conductor, the cable clamp is fastened by the nut sleeve, and the lap joint device can be taken down; the lap joint device is small in size, convenient and quick to use, labor-saving and time-saving. Under the general condition, operating time saves 65% than traditional overlap joint method, can develop and the ditch overlap joint to the wire of different wire diameters, different grade type and different model and ditch ware, application scope is wide, this research and development is put forth the power and is promoted overlap joint ware to the commonality and the suitability of equipment fastener, the lapped firm degree has been improved, can carry out various and the ditch overlap joint, the lapped firm degree has been improved, the lap joint will stand the test of heavy load electric current more easily simultaneously, for transmission line's safe operation, improve the power supply reliability, fine result of use has been obtained.
It is emphasized that the insulating rod is made of epoxy resin except for the metal conductive part, and the insulating property must be absolutely guaranteed. During storage, the insulation tool is required to be stored as an insulation tool to ensure the insulation performance. Meanwhile, the inspection before and during the use is carried out according to the requirements of line safety regulations.
The present invention is not described in detail, but is known to those skilled in the art. Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, 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 may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (7)

1. The utility model provides a high-efficient live working and ditch overlap joint ware, it includes two fastener, and the fastener includes fastener (17) and lower fastener (20) of going up, goes up fastener (17) and lower fastener (20) and passes through bolt (22) and connect its characterized in that: go up fastener (17) and be located two square holes (13) about on locating plate (16), locating plate (16) are through backplate (8) and swivel nut (6) lateral wall fixed connection, be equipped with between locating plate (16) and backplate (8) backup pad (5) that relative slip from top to bottom, backup pad (5) both ends fixed connection bearing (3) outer wall, there is screw rod (4) in swivel nut (6), screw rod (4) pass bearing (3) and with bearing (3) inner circle fixed connection, connecting piece (1) connection insulator spindle (29) are passed through to screw rod (4) bottom, backup pad (5) bottom side fixed connection otic placode (24), drainage wire (9) are located otic placode (24) and pass the fastener.
2. The efficient hot-line work groove lap joint device of claim 1, wherein: the positioning plate (16) is horizontally arranged and is perpendicular to the back plate (8) and the supporting plate (5), a through hole (2) through which the supporting plate (5) penetrates is formed in the positioning plate (16), and the positioning plate (16) can slide up and down along the supporting plate (5) through the through hole (2).
3. The efficient hot-line work groove lap joint device of claim 1, wherein: fixedly connected with oblique position pole (10) between the top of backplate (8) and locating plate (16) outside end, fixedly connected with horizontally arranged limiting plate (15) between oblique pull rod (10) below, the top terminal surface of bolt (22) is located limiting plate (15) below, fixedly connected with connecting rod (11) between oblique position pole (10), backup pad (5) are located the space between connecting rod (11) and backplate (8).
4. The efficient hot-line work groove lap joint device of claim 1, wherein: the outer side wall of the screw sleeve (6) is fixedly connected with a hook (7).
5. The efficient hot-line work groove lap joint device of claim 1, wherein: the ear plates (24) are evenly and vertically arranged in three, and the two lower wire clamps (20) are located between the ear plates (24).
6. The efficient hot-line work groove lap joint device of claim 1, wherein: be equipped with spring (21) on the bottom lateral wall of backup pad (5), the other end of spring (21) is connected with V type hook (19), and V type hook (19) hook is on the top outer fringe of fastener (20) down, has gap (18) that overhead conductor hung to establish between fastener (17) of going up and fastener (20) down.
7. The operation method of the high-efficiency live-working trench-merging lapping device according to any one of claims 1 to 6, characterized in that: the method comprises the following steps:
firstly, peeling off the insulating skin at the end part of the drainage wire (9), inserting the end part of the drainage wire into a groove at the inner side between two upper wire clamps (17) and two lower wire clamps (20), and then, movably connecting and not tightly twisting bolts (22);
secondly, inserting the two upper wire clamps (17) into square holes (13) in a positioning plate (16), positioning the top ends of bolts (22) through a limiting plate (15), and placing drainage wires (9) on ear plates (24);
thirdly, hooking a V-shaped hook (19) on the outer edge of the lower wire clamp (20) to ensure that the gap of a gap (18) between the outer sides of the upper wire clamp (17) and the lower wire clamp (20) is larger than the diameter of the overhead conductor to be lapped;
fourthly, two persons climb the tower for operation, one person holds the device with the drainage wire (9) on the insulating rod (29), hangs the device on the overhead wire to be lapped through the gap (18) and grips the overhead wire, the other person holds the insulating rod with the nut sleeve, firstly pulls the V-shaped hook (19) off the lower clamp (20), and then twists the nut matched with the bolt (22) through the nut sleeve;
fifthly, the threaded sleeve (6), the back plate (8) and the positioning plate (16) move upwards through the reverse rotation of the screw rod (4), the wire clamp and the drainage wire (9) are fixed on the overhead conductor, the positioning plate (16) can be taken down from the upper wire clamp (17), and the hot-line lap joint operation is completed.
CN202010403630.9A 2020-05-13 2020-05-13 Efficient hot-line work groove-combining lap joint device and operation method thereof Pending CN111541054A (en)

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CN202010403630.9A CN111541054A (en) 2020-05-13 2020-05-13 Efficient hot-line work groove-combining lap joint device and operation method thereof

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Application Number Priority Date Filing Date Title
CN202010403630.9A CN111541054A (en) 2020-05-13 2020-05-13 Efficient hot-line work groove-combining lap joint device and operation method thereof

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113131309A (en) * 2021-04-16 2021-07-16 王维祥 Aluminum special-shaped electric parallel groove clamp manufacturing batch assembling machine and assembling method
CN113346257A (en) * 2021-06-09 2021-09-03 贵州电网有限责任公司 Novel ground potential live fire lapping device and use method thereof
CN113852006A (en) * 2021-09-16 2021-12-28 国网四川省电力公司技能培训中心 Method and device for automatically controlling lap joint of high-voltage leads based on wireless remote control

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CN110601095A (en) * 2019-11-05 2019-12-20 贵州电网有限责任公司 Composite type parallel groove lap joint device capable of live working and operation method thereof
CN110661212A (en) * 2019-11-05 2020-01-07 贵州电网有限责任公司 Special-shaped parallel-groove lap joint device capable of working in hot-line mode and operation method thereof
CN110676607A (en) * 2019-11-05 2020-01-10 贵州电网有限责任公司 Parallel groove lapping device capable of live working and operation method thereof

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EP0301326A2 (en) * 1987-07-25 1989-02-01 Robert Bosch Gmbh Inner conductor terminal
CN103022747A (en) * 2012-12-27 2013-04-03 广州番禺电缆集团有限公司 Combination clamp for flat connection terminals and cables
CN203607567U (en) * 2013-12-03 2014-05-21 重庆德普电气有限公司 Drainage wire clamp
CN206471524U (en) * 2017-02-20 2017-09-05 国家电网公司 A kind of safe and intelligent electric discharge device
CN209434425U (en) * 2019-04-28 2019-09-24 姚元涛 A kind of Overhead Transmission Line Construction clamping wire clamp used for short circuit grounding protection
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CN110676607A (en) * 2019-11-05 2020-01-10 贵州电网有限责任公司 Parallel groove lapping device capable of live working and operation method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113131309A (en) * 2021-04-16 2021-07-16 王维祥 Aluminum special-shaped electric parallel groove clamp manufacturing batch assembling machine and assembling method
CN113131309B (en) * 2021-04-16 2022-12-13 新昌县新明实业有限公司 Aluminum special-shaped electric parallel groove clamp manufacturing batch assembly machine and assembly method
CN113346257A (en) * 2021-06-09 2021-09-03 贵州电网有限责任公司 Novel ground potential live fire lapping device and use method thereof
CN113346257B (en) * 2021-06-09 2023-10-24 贵州电网有限责任公司 Novel ground potential live-line ignition device and use method thereof
CN113852006A (en) * 2021-09-16 2021-12-28 国网四川省电力公司技能培训中心 Method and device for automatically controlling lap joint of high-voltage leads based on wireless remote control

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Application publication date: 20200814

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