CN112490697A - Power transmission line personal security wire with insulating gripper - Google Patents
Power transmission line personal security wire with insulating gripper Download PDFInfo
- Publication number
- CN112490697A CN112490697A CN202011089679.8A CN202011089679A CN112490697A CN 112490697 A CN112490697 A CN 112490697A CN 202011089679 A CN202011089679 A CN 202011089679A CN 112490697 A CN112490697 A CN 112490697A
- Authority
- CN
- China
- Prior art keywords
- insulating
- wire
- personal security
- transmission line
- insulating outer
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-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
- H01R4/58—Electrically-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 characterised by the form or material of the contacting members
- H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-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
- H01R4/58—Electrically-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 characterised by the form or material of the contacting members
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
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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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- Suspension Of Electric Lines Or Cables (AREA)
- Insulators (AREA)
Abstract
The invention discloses a personal security wire with an insulating gripper for a power transmission line, which comprises a grounding clamp, a wire clamp and a sheathed wire connected with the grounding clamp and the wire clamp, wherein the insulating gripper comprises an insulating outer sleeve and an expansion inner bushing positioned on the inner side of the insulating outer sleeve and capable of enabling the sheathed wire to pass through, and the expansion inner bushing is provided with at least two expansion claws capable of clamping the sheathed wire. The detachable insulating gripper is used for replacing an insulating rope of an original personal security line, when the detachable insulating gripper is used, a proper position is determined on a lead with a sheath according to the length of insulators with different voltage levels and the self body condition and working habits, the insulating gripper is fixed at the position, and after an operator fixes the grounding clamp on a tower piece, the operator holds the insulating gripper to realize the hanging and detaching work of the personal security line.
Description
Technical Field
The invention relates to an electric power tool, in particular to a personal security wire with an insulating gripper for a power transmission line.
Background
The personal security line is called as a "security line" by the power transmission line worker, and is one of tools and tools commonly used by the power transmission line worker, and the use frequency is high. The personal security wire used at present consists of four parts, namely a grounding clip, a transparent sheath soft copper wire, an insulating rope and a wire clip.
The operation method comprises the following steps: the operation personnel fix personal security wire ground clamp on shaft tower ironware, break off wire end chuck off with the fingers and thumb, realize hanging, tearing open of security wire through control insulating rope, utilize wire clamp, transparent sheath annealed copper wire and ground clamp reliably ground connection with the wire, effectively prevent the operation personnel and electrocute.
There are problems:
1. an insulating rope portion: the insulating rope is easy to wear in the process of carrying or using, is easy to be stained with dirt such as soil, conductive grease and the like, and is easy to corrode and age by being blown by wind, dried by the sun, drenched by rain, so that the insulating property is greatly reduced, and the insulating rope is not insulated any more.
2. The insulating rope and the annealed copper wire are easy to wind when being loosened or bound, the disassembly is time-consuming and labor-consuming, and the working efficiency is reduced.
Disclosure of Invention
The invention aims to solve the technical problems that the personal security wire with the insulating grab for the power transmission line is provided, the problem that the personal security wire is not insulated due to the use of an insulating rope is solved, and time and labor are wasted due to the fact that the insulating rope and a conducting wire are easy to wind when the insulating rope and the conducting wire are loosened or bound.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a take individual security line of transmission line of insulating tongs, includes that ground connection presss from both sides, the wire presss from both sides and connects the area sheath wire that ground connection pressed from both sides and wire pressed from both sides, insulating tongs includes insulating outer tube and is located the inboard inflation neck bush that can make to take the sheath wire to pass of insulating outer tube, the inflation neck bush is equipped with two at least expansion jack catchs that can press from both sides tight area sheath wire, be equipped with the antiskid of conveniently gripping on the insulating outer tube and grip the line.
Preferably, the expansion inner bushing comprises an inner bushing portion inserted into the insulating outer bushing, a first end of the inner bushing portion extends out of the first end of the insulating outer bushing and is in threaded connection with an insulating threaded bushing, and a second end of the inner bushing portion is connected with at least two expansion claws.
Preferably, the at least two expansion clamping jaws are two semicircular parts, an expansion gap is arranged between the two semicircular parts, and a clamping groove matched with the lead with the sheath is formed in the half surface of each semicircular part.
Preferably, the clamping groove is an arc groove or a V-shaped groove.
Preferably, the second end of the insulating outer sleeve is provided with an external thread, and the external thread is connected with an insulating threaded sleeve.
Preferably, the expansion inner bushing comprises two half cylinders, an expansion gap is arranged between the two half cylinders, a clamping groove matched with the lead with the sheath is formed in a half surface of each half cylinder, each half cylinder is provided with a semi-circular table portion acting on the insulating outer sleeve, and the end portion of the insulating outer sleeve is in threaded connection with an insulating threaded sleeve which drives the two half cylinders to contract and enables the clamping groove to clamp the lead with the sheath.
Preferably, the two ends of the insulating outer sleeve are connected with end covers with central holes, the center of the end face of each end cover is provided with a conical groove matched with the side face of the semicircular part, and the end covers are provided with external threads connected with the insulating threaded sleeves.
Preferably, the end cap includes an embedded cylinder inserted into the insulating outer sleeve and a flange portion connected with the embedded cylinder and abutting against an end face of the insulating outer sleeve, and the external thread is arranged on the flange portion.
Preferably, the embedded column and the insulating outer sleeve are glued by epoxy resin.
Preferably, the insulating threaded sleeve is provided with a through hole, and the through hole is connected with an insulating rope ring.
According to the technical scheme, the detachable insulating gripper is used for replacing an insulating rope of an original personal security wire, when the device is used, the proper position is determined on a wire with a sheath according to the length of insulators with different voltage levels by combining the self body condition and the working habit, the insulating gripper is fixed at the position, and after an operator fixes the grounding clamp on a tower member, the operator holds the insulating gripper to realize the hanging and detaching work of the personal security wire.
Because insulating tongs are removable, can pull down insulating tongs and put into special instrument bag after having used up personal security line, guaranteed the insulating properties of insulating tongs.
The insulating tongs and the wire with the sheath are integrated, so that the problem of winding of the original personal security wire does not exist in the operation, and the operation time is greatly saved.
An insulating rope ring is additionally arranged on a through hole, and the insulating rope ring is hooked on a tower piece, so that after an operator on the tower holds the insulating hand grip to hang a personal security thread, the insulating hand grip is prevented from falling to the lower side of the cross arm along with the main thread after the insulating hand grip is opened, and the main thread needs to be lifted up to take the insulating hand grip when the tower is dismantled.
The following detailed description of the present invention will be provided in conjunction with the accompanying drawings.
Drawings
The invention is further described with reference to the accompanying drawings and the detailed description below:
FIG. 1 is a schematic diagram of a first embodiment of an insulated grip of the present invention;
FIG. 2 is a bottom view of two semicircular table portions in the first embodiment of the present invention;
FIG. 3 is a schematic diagram of an insulating hand grip according to one embodiment of the present invention;
FIG. 4 is a schematic diagram of a second embodiment of an insulating grip of the present invention;
in the figure: 1-expansion inner bushing, 11-inner sleeve part, 12-expansion jaw, 2-insulation outer sleeve, 21-end cover, 211-embedded column, 212-flange part, 3-insulation threaded sleeve, 4-insulation rope ring and 5-sheathed wire.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be appreciated by those skilled in the art that features from the examples and embodiments described below may be combined with each other without conflict.
Example one
As shown in fig. 1 to 3, the personal security wire with the insulating gripper for the power transmission line comprises a grounding clamp, a wire clamp, a sheathed wire connecting the grounding clamp and the wire clamp, and the insulating gripper comprising an insulating outer sleeve 2 and an expansion inner bushing 1 which is arranged on the inner side of the insulating outer sleeve and can be penetrated by the sheathed wire, wherein the expansion inner bushing 1 is provided with at least two expansion claws 12 capable of clamping the sheathed wire 5. And the insulating outer sleeve is provided with anti-skid holding grains which are convenient to hold.
Wherein, the sheathed conducting wire can be a soft copper wire with a transparent sheath. The insulating hand grip can be made of common insulating materials such as nylon.
As an embodiment, the expansion inner liner 1 comprises an inner sleeve part 11 inserted into the insulating outer sleeve, a first end of the inner sleeve part extending beyond the first end of the insulating outer sleeve and being threadedly connected with the insulating threaded sleeve 3, and a second end of the inner sleeve part being connected with at least two expansion jaws. The expansion inner bush 1 is pulled to move axially in the first end direction by rotating the insulating threaded sleeve 3, and the expansion claws 12 are contracted to clamp the sheathed wire 5.
In order to facilitate clamping of the lead 5 with the sheath, the at least two expansion claws 12 are two semicircular table parts, an expansion gap is arranged between the two semicircular table parts, and a clamping groove matched with the lead 5 with the sheath is arranged on the half surface of each semicircular table part. And the clamping groove is an arc groove or a V-shaped groove. When the expansion inner bushing 1 moves axially towards the first end direction, the side surface of the semi-circular table part acts with the opening part of the insulating outer sleeve 2 to extrude the two semi-circular table parts to contract inwards to clamp the sheathed wire 5.
Furthermore, the second end of the insulating outer sleeve 2 is provided with an external thread, and the external thread is connected with an insulating threaded sleeve 3. The insulating outer tube 2 between two insulating threaded sleeves 3 of both sides can be held to operating personnel's hand, is convenient for hold, is difficult to the pine and takes off.
The wire 5 with the sheath is penetrated in the insulating outer sleeve 2, when the insulating threaded sleeve 3 is screwed, the expansion claw 12 of the expansion inner bushing 1 is extruded into the insulating outer sleeve 2, the wire 5 with the sheath is compressed, the insulating gripper is fixed on a certain position of the wire 5 with the sheath, and the position of the insulating gripper is grasped by a hand to realize the hanging and the dismounting of the personal security wire.
When the position needs to be adjusted, the insulating threaded sleeve 3 is unscrewed, the expansion claws 12 of the expansion inner bushing 1 are popped out from the insulating outer sleeve 2, the extrusion force is released, the whole insulating outer sleeve 2 can be moved, and the insulating threaded sleeve 3 is screwed after the position is adjusted to a proper position, so that the fixation is realized.
Utilize removable insulating tongs to replace the insulating rope of former individual safety line, combine self stature condition and working habit to confirm suitable position on the wire of taking the sheath according to the insulator length of different voltage classes during the use, fix insulating tongs in this position, after operating personnel fixed the ground clamp to the tower spare, hold insulating tongs and realize hanging, the work of tearing open of individual safety line.
Because insulating tongs are removable, can pull down insulating tongs and put into special instrument bag after having used up personal security line, guaranteed the insulating properties of insulating tongs.
The insulating tongs and the wire with the sheath are integrated, so that the problem of winding of the original personal security wire does not exist in the operation, and the operation time is greatly saved.
Furthermore, the insulating threaded sleeve 3 is provided with a through hole, and the through hole is connected with an insulating rope ring 4. An insulating rope ring is additionally arranged on a through hole, and the insulating rope ring is hooked on a tower piece, so that after an operator on the tower holds the insulating hand grip to hang a personal security thread, the insulating hand grip is prevented from falling to the lower side of the cross arm along with the main thread after the insulating hand grip is opened, and the main thread needs to be lifted up to take the insulating hand grip when the tower is dismantled.
Example two
As shown in fig. 4, in this embodiment, the expansion inner liner 1 is integrally formed as an expansion claw structure composed of two half cylinders, an expansion gap is provided between the two half cylinders, a clamping groove for engaging with the sheathed wire is provided on a half surface of the half cylinder, the half cylinder is provided with a semi-circular table portion for engaging with the insulating outer sleeve, and an insulating threaded sleeve 3 for driving the two half cylinders to contract and clamping the sheathed wire with the clamping groove is threadedly connected to an end portion of the insulating outer sleeve. When insulating thread bushing 3 screwed, two half cylinder axial displacement extrude two half cylinders simultaneously and contract, take sheath wire 5 through pressing from both sides tight groove, make insulating tongs fixed on taking sheath wire 5 a certain position, hold in hand insulating tongs position and realize hanging of individual security line and tear open.
Furthermore, two ends of the insulating outer sleeve 2 are connected with end covers 21 with holes in the centers, the centers of the end surfaces of the end covers 21 are provided with conical grooves matched with the side surfaces of the semi-circular table parts, and the end covers 21 are provided with external threads connected with the insulating threaded sleeves. When the insulating threaded sleeve 3 is screwed, the two half cylinders are extruded to shrink through the action of the conical groove on the side surface of the half circular table part.
As a modification, an end cap may not be provided, and an external thread connected to the insulating threaded bushing may be directly provided at the end of the insulating outer bushing, and the side surface of the semi-circular portion may be fitted to the inner wall of the end of the insulating threaded bushing 2.
Specifically, the end cap 21 includes an embedded cylinder 211 inserted into the insulating outer sleeve and a flange portion 212 connected to the embedded cylinder and abutting against an end surface of the insulating outer sleeve, and the external thread is provided on the flange portion. The embedded column 211 and the insulating outer sleeve 2 are glued by epoxy resin.
Other embodiments of the present invention than the preferred embodiments described above, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, should fall within the scope of the present invention defined in the claims.
Claims (10)
1. The utility model provides a take personal security wire of transmission line of insulating tongs, includes that ground connection presss from both sides, the wire presss from both sides and connects the area sheath wire that ground connection pressed from both sides and wire pressed from both sides, its characterized in that: the insulating tongs include insulating outer tube and be located the inboard inflation inner liner that can make the area sheath wire pass of insulating outer tube, the inflation inner liner is equipped with two at least inflation jack catchs that can press from both sides the area sheath wire, be equipped with the antiskid of conveniently gripping on the insulating outer tube and grip the line.
2. The transmission line personal security wire of claim 1, characterized in that: the expansion inner bushing comprises an inner bushing portion inserted into the insulating outer bushing, a first end of the inner bushing portion extends out of a first end of the insulating outer bushing and is in threaded connection with an insulating threaded bushing, and a second end of the inner bushing portion is connected with at least two expansion clamping jaws.
3. The transmission line personal security wire of claim 2, characterized in that: the at least two expansion clamping jaws are two semicircular parts, an expansion gap is arranged between the two semicircular parts, and a clamping groove matched with the lead with the sheath is formed in the half surface of each semicircular part.
4. The transmission line personal security wire of claim 3, characterized in that: the clamping groove is an arc groove or a V-shaped groove.
5. The transmission line personal security wire of claim 2, characterized in that: and the end part of the second end of the insulating outer sleeve is provided with an external thread, and the external thread is connected with an insulating threaded sleeve.
6. The transmission line personal security wire of claim 1, characterized in that: the expansion inner bushing comprises two half cylinders, an expansion gap is arranged between the two half cylinders, a clamping groove matched with a lead with a sheath is formed in the half surface of each half cylinder, each half cylinder is provided with a semi-circular table portion acting with the insulating outer sleeve, and the end portion of the insulating outer sleeve is in threaded connection with an insulating threaded sleeve which drives the two half cylinders to contract and enables the clamping groove to clamp the lead with the sheath.
7. The transmission line personal security wire of claim 6, characterized in that: the two ends of the insulating outer sleeve are connected with end covers with holes in the centers, the center of the end face of each end cover is provided with a conical groove matched with the side face of the semicircular part, and the end covers are provided with external threads connected with the insulating threaded sleeves.
8. The transmission line personal security wire of claim 7, characterized in that: the end cover comprises an embedded cylinder inserted into the insulating outer sleeve and a flange part connected with the embedded cylinder and abutted against the end face of the insulating outer sleeve, and the external thread is arranged on the flange part.
9. The transmission line personal security wire of claim 8, characterized in that: the embedded column and the insulating outer sleeve are glued by epoxy resin.
10. The transmission line personal security wire of any one of claims 2 to 9, characterized in that: the insulating threaded sleeve is provided with a through hole, and the through hole is connected with an insulating rope ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011089679.8A CN112490697B (en) | 2020-10-13 | 2020-10-13 | Power transmission line personal security wire with insulating gripper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011089679.8A CN112490697B (en) | 2020-10-13 | 2020-10-13 | Power transmission line personal security wire with insulating gripper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112490697A true CN112490697A (en) | 2021-03-12 |
| CN112490697B CN112490697B (en) | 2022-07-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011089679.8A Active CN112490697B (en) | 2020-10-13 | 2020-10-13 | Power transmission line personal security wire with insulating gripper |
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| Country | Link |
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| CN (1) | CN112490697B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114094357A (en) * | 2021-09-28 | 2022-02-25 | 金华送变电工程有限公司 | General earthing device for 500kV and above power transmission lines |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2006225203A1 (en) * | 2005-10-03 | 2007-04-19 | Australian Height Safety Services Pty Ltd | A safety line anchoring device |
| CN201859947U (en) * | 2010-10-28 | 2011-06-08 | 黄坦 | Double-sleeve joint for lead wires |
| CN105406218A (en) * | 2015-11-11 | 2016-03-16 | 国网浙江省电力公司湖州供电公司 | High-voltage grounding wire clamp |
| CA2970712A1 (en) * | 2016-06-16 | 2017-12-16 | The Ford Meter Box Company, Inc. | No contact connectors |
| CN109687191A (en) * | 2018-12-07 | 2019-04-26 | 金华送变电工程有限公司 | A kind of portable individual safety wire |
| CN211295399U (en) * | 2019-07-17 | 2020-08-18 | 国网辽宁省电力有限公司朝阳供电公司 | Line side shielding formula ground terminal structure and insulating bar of installation usefulness thereof |
-
2020
- 2020-10-13 CN CN202011089679.8A patent/CN112490697B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2006225203A1 (en) * | 2005-10-03 | 2007-04-19 | Australian Height Safety Services Pty Ltd | A safety line anchoring device |
| CN201859947U (en) * | 2010-10-28 | 2011-06-08 | 黄坦 | Double-sleeve joint for lead wires |
| CN105406218A (en) * | 2015-11-11 | 2016-03-16 | 国网浙江省电力公司湖州供电公司 | High-voltage grounding wire clamp |
| CA2970712A1 (en) * | 2016-06-16 | 2017-12-16 | The Ford Meter Box Company, Inc. | No contact connectors |
| CN109687191A (en) * | 2018-12-07 | 2019-04-26 | 金华送变电工程有限公司 | A kind of portable individual safety wire |
| CN211295399U (en) * | 2019-07-17 | 2020-08-18 | 国网辽宁省电力有限公司朝阳供电公司 | Line side shielding formula ground terminal structure and insulating bar of installation usefulness thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114094357A (en) * | 2021-09-28 | 2022-02-25 | 金华送变电工程有限公司 | General earthing device for 500kV and above power transmission lines |
| CN114094357B (en) * | 2021-09-28 | 2023-08-18 | 金华送变电工程有限公司 | Universal grounding device for 500kV and above transmission lines |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112490697B (en) | 2022-07-26 |
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