CN109361129A - It is a kind of for assembling and disassembling the automatic impaction equipment of grounding hook - Google Patents
It is a kind of for assembling and disassembling the automatic impaction equipment of grounding hook Download PDFInfo
- Publication number
- CN109361129A CN109361129A CN201811486208.3A CN201811486208A CN109361129A CN 109361129 A CN109361129 A CN 109361129A CN 201811486208 A CN201811486208 A CN 201811486208A CN 109361129 A CN109361129 A CN 109361129A
- Authority
- CN
- China
- Prior art keywords
- spring
- tube
- hook
- pressing plate
- outer tube
- 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.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
-
- 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
Abstract
The invention discloses a kind of for assembling and disassembling the automatic impaction equipment of grounding hook, including spring inner tube, compressed spring and spring outer tube, spring upper end of inner tube is fixedly connected on pressing plate lower end, lower end is embedded into spring outer tube, compressed spring is actively set on sliding mandril, upper end is resisted against pressing plate bottom, and lower end is resisted against on the stop collar of spring outer tube lower end, and spring outer tube upper end is fixedly connected on insulation tube.Compressed spring of the invention discharges tension to pressing plate and squeezes conducting wire and hook head, it is close to reach the fitting of pressing plate crimping lead wire surrounding, it enables adaptation to continual can continue to be reliably connected with conducting wire when any angle is installed, improve connection reliability and stability, and guarantee grounding hook always with the contact area of conducting wire, reliable and stable safety is connected, it is time saving and energy saving to mount.
Description
Technical field
The invention belongs to assemble and disassemble grounding hook technical field, and in particular to a kind of for assembling and disassembling the automatic impaction of grounding hook
Equipment.
Background technique
When short-circuit grounding wire is electrical equipment and power circuit interruption maintenance, to ensure the safety of operating personnel, and take
One important guarantee technical safety measures can effectively prevent the injury sent a telegram here suddenly to human body, be one for protecting service personnel
Safety curtain is electrical employee " lifeline ", standardizes reliable extension, dismounting ground wire is just avoided that due to ground line and causes
Electrical hazard.
It is grounded main three parts composition, is grounding hook, short-circuit conductors, Jie Diji ground connection clamping plate, each portion respectively
Part, which reliably connects just, can guarantee effectively to conducting wire progress short circuit, effectively take precautions against the fortuitous events such as lightning stroke, maloperation, induced electricity
Injury of the electric current of generation to operating area personnel, and the important component grounding hook in the ground line now used, with electricity
There is invalid, insecure great security risk in the connection of power conducting wire, directly threaten the personal safety of service personnel.
It generally uses single, double tongue chip grounding hook and hedgehog hydnum formula anti-dropout to be grounded in present work about electric power to hang
Hook both types:
1, the application and security risk of single, double tongue chip grounding hook
This kind of grounding hook structure is simply cheap, and fast assembling and disassembling is convenient, but its install in any angle can be with conducting wire reality
Border contact surface is too small, and the effect of effectively reliable conduction electric current is not achieved, and easily falls off, link up with clamping and be detached from conducting wire
When can also injure conductive line surfaces, therefore from 2016 to 2017 year between complete to eliminate simultaneously successively in South China power grid compass of competency
Prohibite use；
Single, double tongue chip grounding hook as shown in Figure 1 and Figure 2 either will form serious contact in any setting angle
Bad defect, and influence clip vulnerable to angle and be loosely detached from electrical lead, security risk is prominent.
2, hedgehog hydnum formula anti-dropout grounding hook:
Each upkeep operation unit of south electric network, department use hedgehog hydnum formula anti-dropout grounding hook, the hook of the type at this stage
Only with electrical lead formed vertical 90 ° be ideally just able to achieve clamp conducting wire, be reliably connected, there is very big set
Meter defect and it is more serious dangerous, insecure security risk is connect with conducting wire, seriously threaten the person of service personnel
Safety；
As shown in figure 3, only setting angle 90 ° ideally when be just able to achieve being reliably connected for hook and conducting wire.
As shown in figure 4, when setting angle forms non-90 degree, close to side plate in human body and caliper outboard meeting stress suitable for reading
Stuck, due to gravity factor when operating personnel unclamps grounding hook, hook just will appear " hanging idle loop " phenomenon and connect not with conducting wire
Reliably cause serious security risk.
The unreasonable situation of man-machine effect is existed simultaneously, due to being to twist the body of rod using manpower wrist spiral is made to push away column front and back fortune
It is dynamic to complete to the firm of conducting wire and loosen, measured in the ideal situation through live practical operation, such hook it is single it is tight, tear open when
Rotation 60 is required to turn left the right side, spent time is 1 minute or so, three for one group hook dress, tear open operating personnel needed to twist altogether
Turn 360 to turn left the right side, at 6 ~ 7 minutes or so, the true lower 10 kilovolts of shaft tower conducting wires of operating environment time-consuming in total about existed filling, tear open time-consuming
50 minutes or so, 35 KV line shaft towers were about at 60 minutes or so, and operating personnel is made by wearing insulating glove and high-altitude
Industry etc. influences, and operation is more difficult to consume a large amount of physical efficiency, while also increasing the security risk of operation, and power off time prolongs
Length will also result in undesirable social influence and all trades and professions economic loss.
In conclusion existing grounding hook and be not present automatically lock equipment, so that there are the following problems:
(1) hook installing is affected by angle, and there are the serious unreliable security risks of connection；
(2) hedgehog hydnum anticreep grounding hook there are mechanism design it is unreasonable, time and effort consuming man-machine efficacy is poor.
Summary of the invention
Technical problem solved by the present invention is provide it is a kind of for assembling and disassembling the automatic impaction equipment of grounding hook, with solve
Above-mentioned problems of the prior art.
The technical scheme adopted by the invention is as follows: it is a kind of for assembling and disassembling the automatic impaction equipment of grounding hook, including in spring
Pipe, compressed spring and spring outer tube, spring upper end of inner tube are fixedly connected on pressing plate lower end, and lower end is embedded into spring outer tube, pressure
Contracting spring is actively set on sliding mandril, and upper end is resisted against pressing plate bottom, and lower end is resisted against on the stop collar of spring outer tube lower end,
Spring outer tube upper end is fixedly connected on insulation tube.
Preferably, above-mentioned insulation tube lower end is provided with bisymmetric J-type guide chute, J-type guiding along its length
Slidable bolt is installed, both ends are embedded in two J-type guide chutes after bolt is horizontally through insulated pull rod on sliding slot.
Preferably, it is provided with translucent cover at above-mentioned J-type guide chute, translucent cover is fixedly attached to insulation tube lower end.
Preferably, above-mentioned insulation tube upper end spiral is connected with connecting sleeve, the stop collar of spring outer tube upper end evagination against
In insulation tube upper end, connecting sleeve spiral is connected with step set axis and locks stop collar, and step set axis upper end spiral is fixedly connected
Pressing plate bottom end.
Preferably, the other end passes through insulated pull rod using locking tube fastening after above-mentioned bolt stub end socket position-limiting tube.
Beneficial effects of the present invention: compared with prior art, effect of the invention is as follows:
(1) compressed spring of the invention discharges tension to pressing plate extruding conducting wire and hook head, reaches pressing plate crimping lead wire surrounding patch
It closes closely, enables adaptation to continual can continue to be reliably connected with conducting wire when any angle is installed, raising connection can
By property and stability, and guarantee that grounding hook with the contact area of conducting wire, connects reliable and stable safety always, mounts time saving province
Power；
(2) spring system of automatic compacting device, spring system is made of spring outer tube, spring inner tube, compressed spring, outside spring
Pipe has the function of installation and limit spring；Inner tube has the function of installing spring and fixation clip, while playing protection spring
Effect, the durability of enhancing hook；
(3) J-type guide chute, the bayonet lock on J-type guide chute coordinated insulation pull rod are completed mechanism and are reliably limited and displacement；
(7) sliding slot and bayonet lock a, transparent sheath: is effectively protected；B, it prevents dirt from entering, causes mechanism blockage；C, clip is prevented
Insulating glove；D, it is observed convenient for mechanism status.
Detailed description of the invention
Fig. 1 is the single, double vertically-mounted structural schematic diagram of tongue chip grounding hook；
Fig. 2 is the single, double vertically-mounted structural schematic diagram of tongue chip grounding hook；
Fig. 3 is the vertically-mounted structural schematic diagram of hedgehog hydnum formula anti-dropout grounding hook；
Fig. 4 is the vertically-mounted structural schematic diagram of hedgehog hydnum formula anti-dropout grounding hook；
Fig. 5 is automatic locking type hook principle mounting structure schematic diagram；
Fig. 6 is the hook structure schematic diagram with self-locking function；
Fig. 7 is the hook schematic cross-sectional view with self-locking function；
Fig. 8 is attachment structure schematic diagram at hook；
Fig. 9 is the hook configuration schematic diagram with self-locking function.
Specific embodiment
With reference to the accompanying drawing and the present invention is described further in specific embodiment.
Embodiment 1: a kind of for assembling and disassembling the automatic impaction equipment of grounding hook, including spring inner tube as shown in Fig. 5-Fig. 9
6, compressed spring 7 and spring outer tube 8,6 upper end of spring inner tube are fixedly connected on 4 lower end of pressing plate, and lower end is embedded into spring outer tube 8
Interior, compressed spring 7 is actively set on sliding mandril 5, and upper end is resisted against 4 bottom of pressing plate, and lower end is resisted against 8 lower end of spring outer tube
On stop collar 9,8 upper end of spring outer tube is fixedly connected on insulation tube 1.
Preferably, above-mentioned 1 lower end of insulation tube is provided with bisymmetric J-type guide chute 10 along its length, and J-type is led
Slidable bolt 11 is installed on sliding slot 10, both ends are embedded in two J-type guide chutes after bolt 11 is horizontally through insulated pull rod 2
In 10.
Preferably, it is provided with translucent cover 12 at above-mentioned J-type guide chute 10, translucent cover 12 is fixedly attached under insulation tube 1
End.
Preferably, above-mentioned 1 upper end spiral of insulation tube is connected with connecting sleeve 13, the stop collar of 8 upper end evagination of spring outer tube
15 are resisted against 1 upper end of insulation tube, and 13 spiral of connecting sleeve is connected with step set axis 14 and locks stop collar 15, and step covers on axis 14
End spiral is fixedly connected with 4 bottom end of pressing plate.
Preferably, the other end passes through insulated pull rod 2 and uses locking tube 21 after above-mentioned 11 stub end of bolt socket position-limiting tube 20
Fastening.
Embodiment 2: as shown in Fig. 5-Fig. 9, a kind of semi-automatic rapid-assembling/disassembling grounding hook, including insulation tube 1, insulated pull rod
2, hook 3 and pressing plate 4,1 upper end of insulation tube are fixedly connected on 3 free ends of hook, sliding top are rotatably connected on the downside of pressing plate 4
The hook portion of 5 upper end of bar and upper end face hook 3, sliding mandril 5 actively penetrate insulation tube 1 and are fixedly connected with insulated pull rod 2, absolutely
2 other end of edge pull rod is pierced by 1 lower end of insulation tube, and the automatic compacting device for driving it to move up is equipped on pressing plate 4.
Preferably, above-mentioned automatic compacting device includes spring inner tube 6, compressed spring 7 and spring outer tube 8, in spring inner tube 6
End is fixedly connected on 4 lower end of pressing plate, and lower end is embedded into spring outer tube 8, and compressed spring 7 is actively set on sliding mandril 5, upper end
It is resisted against 4 bottom of pressing plate, lower end is resisted against on the stop collar 9 of 8 lower end of spring outer tube, and 8 upper end of spring outer tube is fixedly connected on absolutely
On edge pipe 1.
Preferably, above-mentioned 1 lower end of insulation tube is provided with bisymmetric J-type guide chute 10 along its length, and J-type is led
Slidable bolt 11 is installed on sliding slot 10, both ends are embedded in two J-type guide chutes after bolt 11 is horizontally through insulated pull rod 2
In 10.
Preferably, it is provided with translucent cover 12 at above-mentioned J-type guide chute 10, translucent cover 12 is fixedly attached under insulation tube 1
End.
Preferably, above-mentioned 1 upper end spiral of insulation tube is connected with connecting sleeve 13, the stop collar of 8 upper end evagination of spring outer tube
15 are resisted against 1 upper end of insulation tube, and 13 spiral of connecting sleeve is connected with step set axis 14 and locks stop collar 15, and step covers on axis 14
End spiral is fixedly connected with 4 bottom end of pressing plate.
Preferably, the other end passes through insulated pull rod 2 and uses locking tube 21 after above-mentioned 11 stub end of bolt socket position-limiting tube 20
Fastening.
Preferably, above-mentioned 2 bottom end of insulated pull rod is fixedly connected with handle 16.
Preferably, above-mentioned 16 tail end of handle is provided with hanging hole 17, and hanging hole 17 is screwed into insulated pull rod tail by conical screw 18
It holds and passes through and expansion tube 19 and hanging hole 17 and insulated pull rod are fixedly connected on handle 16 in expansion tube 19, it is solid on hanging hole 17
Surely it is connected with insulation traction rope 22.
Rounded corner and pressing plate two sides rounded corner is arranged in hook portion two sides.
Hook head lightweight Intensity Design reduces hook head weight saving, cost using hollow out and reinforcing rib structure
Meanwhile not influencing its mechanical strength, it is ensured that safe and reliable.
Semi-automatic rapid-assembling/disassembling grounding hook mechanical work principle:
(1), mechanism prepares state:
Pulling back Anti-slip handle makes the spring of insulated pull rod and sliding mandril motion compresses spring inner tube backward, blocks during this
Pin enters " J " type back bending along insulation tube wall sliding slot end and completes limit, and hook is made to be flared to spare space with pressing plate；
(2), mechanism working condition
Pulling back Anti-slip handle moves bayonet lock along insulation tube wall sliding slot to hook direction from " J " type back bending abjection, this process
Spring release in middle spring inner tube pushes pressing plate to close up with hook.
Embodiment 2: as shown in figures 5-9, a kind of operating method of semi-automatic rapid-assembling/disassembling grounding hook, this method are as follows: hang
Short-circuit conductors are installed on hook, insulated pull rod is moved backward makes bolt slide into J-type guide chute end spacing place automatically, so that
Pressing plate retracts the hook portion for opening hook clamping, hook is articulated on work section electrical lead, and pull back insulated pull rod
Moving backward, which makes bolt skid off J-type guide chute automatically, travels forward, and insulated pull rod is made in the compressed spring of automatic compacting device
It is forward extended out under, pressing plate is rested firmly against on work section electrical lead, the insulation traction rope on hanging hole is another by operating
End is fixed on electric pole or framework, and release handle, and insulation tube is hanging.
When disassembly hook, handle is withdrawn into operator's hand by the insulation traction rope being fixed on hanging hole, is retracted
Insulated pull rod simultaneously rotates, and realizes the disassembly of hook.
Assembly and disassembly grounding hook has the advantages that
(1) tension to pressing plate is discharged by automatic compacting device (compressed spring) in the case where linking up with working condition and squeezes conducting wire and hook
Head, reaches that surrounding fitting is close, which, which appoints, continual can continue to be reliably connected with conducting wire in the installation of what angle,
Under the action of uninterrupted strength hook under the action of spring tension automatically with electrical lead shape angle in 90 °, and guarantee connect
Ground hook connects reliable and stable safety always with the contact area of conducting wire, and it is time saving and energy saving to mount, will not damage wires surface, no
It is loosened because of the pulling force of insulation tube, operational safety is high, avoids touching short-circuit line；
(2) make operating personnel dress, tear open operation it is relatively reliable convenient.Grounding hook and conducting wire are reliably connected shared 2 seconds when filling, tearing open,
It relative to existing hedgehog hydnum formula anticreep grounding hook dress, tears open 6 minutes total used times, working efficiency promotes 99%, reduces the labour of operator
Intensity reduces operating risk；
(3) insulated pull rod rear portion hanging hole, cooperation drag rope use, and thoroughly eliminate to be grounded to remove and directly touch short-circuit conductors
Violation problem eliminates person electric shock hidden danger；
(4) hook hook portion bayonet greatly reduces convenient for being designed to disc chamfering to conductive line surfaces clip, friction injury；
(5) hook head is stationary state, and operator can control hooking slits direction, does not have to drawing short-circuit line, thoroughly avoids
Operation against rules and electrical shock safety hazard；
(6) hook head lightweight Intensity Design, unique hollow out and reinforcing rib design reduce hook head weight saving, cost
While, its mechanical strength is not influenced, it is ensured that safe and reliable；
(7) spring system of automatic compacting device, spring system is made of spring outer tube, spring inner tube, compressed spring, outside spring
Pipe has the function of installation and limit spring；Inner tube has the function of installing spring and fixation clip, while playing protection spring
Effect, the durability of enhancing hook；
(8) J-type guide chute, the bayonet lock on J-type guide chute coordinated insulation pull rod complete mechanism and reliably limit and orient shifting
It is dynamic；
(9) sliding slot and bayonet lock a, transparent sheath: is effectively protected；B, it prevents dirt from entering, causes mechanism blockage；C, clip is prevented
Insulating glove；D, it is observed convenient for mechanism status；
(10) fixable/dismountable combined cone expands tube body fixed handle, when assembling: expansion tube is packed into insulated pull rod pipe, and
Afterwards by tapered square thread pull ring bolt insertion expansion tube in, up time rotation make expansion tube expand outwardly formed with handle jacket it is crowded
Pressure is bonded insulated pull rod with handle external member to clamp insulated pull rod, bolt in opposite direction rotation pull ring when disassembly,
It quickly exits, expansion tube restores just history state, easily removes；
When disassembly: rotation exits bolt rotation in tapered square thread pull ring counterclockwise, and expansion tube restPoses and handle
Housing loses extruding force, loosens with insulated pull rod, to complete to remove；
(11) replaceable part reduces loss, waste, if the grounding hook used now is in insulation supervisor damage, pressure test
The problems such as unqualified, will result in a whole branch and scrap completely, make to hook metal parts, the handle etc. that still are able to normal use
At waste.And it semi-automatic fast quick-mounting, tears grounding hook each component open and can be carried out replacing, such as encounter main body insulation tube damage
Bad or pressure resistance breakdown, the then qualified insulation tube piece that changes the outfit after can decomposing complete maintenance, and other parts are also in this way, reaching reduction
Value is created in waste.
Example that the above description is merely a specific embodiment, scope of protection of the present invention is not limited thereto.It is ripe
It knows the those skilled in the art in the technical scope disclosed by the present invention, change or replacement mode can be easily found, these
It should be covered by the protection scope of the present invention.For this purpose, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (5)
1. a kind of for assembling and disassembling the automatic impaction equipment of grounding hook, it is characterised in that: including spring inner tube (6), compressed spring
(7) and spring outer tube (8), spring inner tube (6) upper end are fixedly connected on pressing plate (4) lower end, and lower end is embedded into spring outer tube (8)
Interior, compressed spring (7) is actively set on sliding mandril (5), and upper end is resisted against pressing plate (4) bottom, and lower end is resisted against spring outer tube
(8) on the stop collar (9) of lower end, spring outer tube (8) upper end is fixedly connected on insulation tube (1).
2. according to claim 1 a kind of for assembling and disassembling the automatic impaction equipment of grounding hook, it is characterised in that: insulation tube
(1) lower end is provided with bisymmetric J-type guide chute (10) along its length, and being equipped on J-type guide chute (10) can
The bolt (11) of sliding, bolt (11) is horizontally through insulated pull rod (2), and both ends are embedded in two J-type guide chutes (10) afterwards.
3. according to claim 2 a kind of for assembling and disassembling the automatic impaction equipment of grounding hook, it is characterised in that: J-type is led
It is provided with translucent cover (12) to sliding slot (10), translucent cover (12) is fixedly attached to insulation tube (1) lower end.
4. according to claim 1 a kind of for assembling and disassembling the automatic impaction equipment of grounding hook, it is characterised in that: insulation tube
(1) upper end spiral is connected with connecting sleeve (13), and the stop collar (15) of spring outer tube (8) upper end evagination is resisted against insulation tube (1)
Upper end, connecting sleeve (13) spiral are connected with step set axis (14) and lock stop collar (15), and step covers axis (14) upper end spiral
It is fixedly connected with pressing plate (4) bottom end.
5. according to claim 1 a kind of for assembling and disassembling the automatic impaction equipment of grounding hook, it is characterised in that: bolt
(11) other end passes through insulated pull rod (2) using locking tube (21) fastening afterwards for stub end socket position-limiting tube (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811486208.3A CN109361129A (en) | 2018-12-06 | 2018-12-06 | It is a kind of for assembling and disassembling the automatic impaction equipment of grounding hook |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811486208.3A CN109361129A (en) | 2018-12-06 | 2018-12-06 | It is a kind of for assembling and disassembling the automatic impaction equipment of grounding hook |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109361129A true CN109361129A (en) | 2019-02-19 |
Family
ID=65331555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811486208.3A Pending CN109361129A (en) | 2018-12-06 | 2018-12-06 | It is a kind of for assembling and disassembling the automatic impaction equipment of grounding hook |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109361129A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165430A (en) * | 2019-05-28 | 2019-08-23 | 国网黑龙江省电力有限公司牡丹江供电公司 | A kind of grounding clamping apparatus |
| CN111610351A (en) * | 2020-06-04 | 2020-09-01 | 贵州电网有限责任公司 | Lap joint type high-altitude junction pole |
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| CN204741228U (en) * | 2015-07-30 | 2015-11-04 | 广西电网有限责任公司梧州供电局 | Insulating couple of three -phase short circuit grounding |
| CN205122822U (en) * | 2015-11-24 | 2016-03-30 | 国家电网公司 | Solid ground line |
| CN205565036U (en) * | 2016-05-03 | 2016-09-07 | 国网江西省电力公司南昌供电分公司 | Electric power wire overhauls with meeting ground wire device convenient to operation |
| CN206673133U (en) * | 2017-05-02 | 2017-11-24 | 贵州电网有限责任公司 | A kind of screw bolt-type ground wire grounding device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204156132U (en) * | 2014-10-27 | 2015-02-11 | 广东电网韶关乳源供电局 | A kind of universal slide bolt rotary extrusion type spinning earth rod |
| CN204741228U (en) * | 2015-07-30 | 2015-11-04 | 广西电网有限责任公司梧州供电局 | Insulating couple of three -phase short circuit grounding |
| CN205122822U (en) * | 2015-11-24 | 2016-03-30 | 国家电网公司 | Solid ground line |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110165430A (en) * | 2019-05-28 | 2019-08-23 | 国网黑龙江省电力有限公司牡丹江供电公司 | A kind of grounding clamping apparatus |
| CN111610351A (en) * | 2020-06-04 | 2020-09-01 | 贵州电网有限责任公司 | Lap joint type high-altitude junction pole |
| CN111610351B (en) * | 2020-06-04 | 2022-09-16 | 贵州电网有限责任公司 | Lap joint type high-altitude junction pole |
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