CN112490992B - Insulating sleeve head - Google Patents
Insulating sleeve head Download PDFInfo
- Publication number
- CN112490992B CN112490992B CN202011312802.8A CN202011312802A CN112490992B CN 112490992 B CN112490992 B CN 112490992B CN 202011312802 A CN202011312802 A CN 202011312802A CN 112490992 B CN112490992 B CN 112490992B
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- insulating
- sleeve
- presser
- hole
- hard
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/05—Suspension arrangements or devices for electric cables or lines
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Abstract
The invention relates to an insulating sleeve head which comprises a hard insulating sleeve with a sleeve hole used for inserting a line head of an overhead conductor, an insulating presser movably arranged in the sleeve hole and used for being matched with the hard insulating sleeve to press the line head of the overhead conductor and an insulating bolt used for driving the insulating presser to move, wherein a sleeve screw hole is formed in the pipe wall of the hard insulating sleeve, a presser screw hole is formed in the insulating presser, the middle part of the insulating bolt is connected with the sleeve screw hole through threads, and one end of the insulating bolt is connected with the presser screw hole through threads. The partial inner wall of the sleeve hole is provided with a plurality of sleeve creepage distance sawteeth, and the partial inner wall of the sleeve hole is provided with a sleeve tooth mouth. The insulating presser is provided with a plurality of insulating presser creepage saw teeth, and the insulating presser is provided with a presser tooth mouth. The insulating blanket is wrapped outside the insulating sleeve head. The invention can safely and reliably fix the wire end of the overhead conductor, can ensure the required insulation protection effect by matching with the insulation blanket, and has lower cost when the insulation blanket is placed and damaged.
Description
Technical Field
The invention belongs to the technical field of electrical equipment and electrical engineering, and particularly relates to a live-line work tool for a 10kV distribution network in the power industry, in particular to an insulating sleeve head for reporting a live-line wire joint in a live-line work process.
Background
At present, in the live working of a 10kV distribution network, an electrified overhead conductor wire head in the head removing work is wrapped by folding a plurality of layers of insulating blankets in a fixing mode, and then the insulating blankets and the wrapped conductor are clamped together by insulating clamps.
10kV air wire's conductor material is aluminum product or steel, and the single strand wire section of deciding has sharp edge (incision) usually, directly wraps up the wire with insulating blanket, if the section of wire is decided the back and is not polished, then sharp edge then probably causes the destruction to insulating blanket crust. Individual insulation blankets are expensive and are discarded once the outer skin of the insulation blanket is scratched, resulting in irreparable damage.
In addition, 10kV overhead conductors, especially insulated conductors, are cylindrical, the insulating sheath is smooth, the insulated clip is used together with the insulated blanket and the conductors to clip, if the pressure applied by the clip is insufficient, the clipped insulated blanket may fall off after being disturbed by external force (blown by wind or collided) during high-altitude operation, falling objects are caused, and even unpredictable dangers may be caused by suddenly exposed live conductor heads.
Disclosure of Invention
The invention aims to provide an insulating sleeve head for fixing an overhead conductor wire head, which is safe, reliable and low in cost.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides an insulating pullover for fixed electrified overhead conductor line head, insulating pullover including have be used for inserting the hard insulation sleeve of the cover tube hole of overhead conductor line head, the activity set up in the cover tube hole and be used for with hard insulation sleeve cooperation and compress tightly the insulating presser of overhead conductor line head and be used for driving the insulating bolt that insulating presser removed, hard insulation sleeve's length direction, the length direction of insulating presser all follows the length direction setting of overhead conductor line head, be provided with the sleeve screw on hard insulation sleeve's the pipe wall, be provided with the presser screw on the insulating presser, the middle part of insulating bolt with the sleeve screw passes through threaded connection, the one end of insulating bolt with the presser screw passes through threaded connection.
And a plurality of casing creepage saw teeth for increasing creepage distance are arranged on the local inner wall of the casing hole along the length direction.
And a sleeve tooth mouth for increasing friction force is arranged on the local inner wall of the sleeve hole, which is in contact with the overhead conductor head.
The depth of the sleeve hole is larger than the sum of the length of the exposed wire core in the overhead conductor wire head and the set length allowance.
And a plurality of insulating presser creepage saw teeth for increasing creepage distance are arranged on the insulating presser along the length direction of the insulating presser.
And a pressing tooth mouth for increasing friction force is arranged on the outer surface of the insulating pressing piece, which is in contact with the overhead conductor wire head.
And the insulating bolt is provided with scale marks for indicating the relative position between the insulating bolt and the insulating presser.
The cross section of the hard insulating sleeve and the cross section of the sleeve hole are both in a closed figure formed by two parallel straight line sections and arc line sections respectively arranged at two ends of the straight line sections.
The cross section of the insulating presser is in an arch shape.
And an insulating blanket is wrapped outside the insulating sleeve head.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the invention can safely and reliably fix the wire end of the overhead conductor, can ensure the required insulation protection effect by matching with the insulation blanket, and has lower cost when the insulation blanket is placed and damaged.
Drawings
Fig. 1 is a front view schematically showing an insulating cuff of the present invention.
Fig. 2 is a schematic top view of the insulating cuff of the present invention.
Fig. 3 is a side view of the insulating cuff of the present invention.
Fig. 4 is a rear view of the insulating cuff of the present invention.
Fig. 5 is a front view schematically showing a hard insulating sleeve in the insulating sleeve head according to the present invention.
Fig. 6 is a schematic top view of a hard insulating sleeve in an insulating bit according to the present invention.
Fig. 7 is a side view of a hard insulating sleeve in an insulating bit according to the present invention.
Fig. 8 is a rear view of a hard insulating sleeve in an insulating sleeve head according to the present invention.
Fig. 9 is a schematic cross-sectional view of a hard insulating sleeve in the insulating sleeve head according to the present invention.
Fig. 10 is a front view of the insulating presser in the insulating cuff of the present invention.
Fig. 11 is a schematic top view of an insulating presser in the insulating cuff of the present invention.
FIG. 12 is a side view of the insulating presser in the insulating cuff of the present invention
Fig. 13 is a rear view of the insulating presser in the insulating cuff of the present invention.
Fig. 14 is a schematic cross-sectional view of an insulating presser in the insulating cuff of the present invention.
Fig. 15 is a front view of an insulating bolt in the insulating socket of the present invention.
In the above drawings: 1. a hard insulating sleeve; 2. an insulating presser; 3. an insulating bolt; 4. sleeving the pipe hole; 5. a sleeve screw hole; 6. casing creep distance sawtooth; 7. sleeving the tooth mouth; 8. a presser screw hole; 9. pressing the sawtooth at the creep distance; 10. pressing the teeth mouth.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings to which the invention is attached.
The first embodiment is as follows: as shown in fig. 1 to 4, an insulating sleeve head for fixing a live overhead conductor end in live working of a 10kV distribution network comprises three parts, namely a hard insulating sleeve 1, an insulating presser 2 and an insulating bolt 3. The hard insulating sleeve 1 is provided with a sleeve hole 4 for inserting a line head of an overhead conductor, the insulating press 2 is movably arranged in the sleeve hole 4 and can be matched with the hard insulating sleeve 1 to press the line head of the overhead conductor, and the insulating bolt 3 is respectively connected with the hard insulating sleeve 1 and the insulating press 2 and is used for driving the insulating press 2 to move in the sleeve hole 4.
As shown in fig. 5 to 9, the hard insulating sleeve 1 has a sleeve hole 4 for inserting the end of the overhead conductor, and the sleeve hole 4 is disposed along the length direction of the hard insulating sleeve 1, so that the hard insulating sleeve 1 has an elongated tubular shape, and the length direction of the hard insulating sleeve 1 is disposed along the length direction of the end of the overhead conductor to be fixed. The sectional shape of the hard insulating sleeve 1 and the sectional shape of the sleeve hole 4 are both closed figures formed by two parallel straight line segments and arc line segments respectively arranged at two ends of the straight line segments, the wall thicknesses of all parts of the formed sleeve hole 4 are the same, and the thickness requirement of the hard insulating sleeve 1 is based on that the insulation performance of the parts does not generate breakdown between an inner wall layer and an outer wall layer and the industrial strength which meets the actual requirement is adopted. The middle part of the arc-shaped pipe wall of the hard insulating sleeve 1 is provided with a sleeve screw hole 5 for communicating the inside and the outside of the hard insulating sleeve 1. The end of the sleeve screw hole 5 is defined as the upper end of the hard insulating sleeve 1, and the opposite end is defined as the lower end of the hard insulating sleeve 1.
On the local inner wall of sleeve hole 4, that is, on the inner wall of the upper end, on both sides of sleeve screw hole 5, a plurality of sleeve creepage saw teeth 6 for increasing creepage distance are arranged along the length direction. The inner wall of the partial inner wall of the sleeve hole 4 contacting with the overhead conductor wire head, namely the inner wall of the lower end, is provided with a sleeve tooth mouth 7 for increasing friction force.
The depth of the sleeve hole 4, namely the vertical distance from the mouth of the sleeve hole 4 at one end of the sleeve in the length direction to the bottom of the sleeve hole 4, needs to be greater than the sum of the length of the exposed wire core in the overhead conductor wire head and the set length allowance. After the outer skin of the head part of the overhead conductor is stripped, the length of the exposed wire core is generally about 100mm, the distance from the exposed wire core to the outside of the hard insulating sleeve 1 is generally required to be more than 150mm, and the design consideration is that the depth of the sleeve hole 4 has a certain allowance, so the depth D of the sleeve hole 4Depth of hole＞DLength of insulated wire core+150 mm. The depth of the sleeve hole 4 can be designed to be 300mm, and the specific selection is set according to actual requirements.
The inner diameter of the sleeve hole 4 needs to be slightly larger than the diameter of the overhead conductor wire head, namely DInner diameter＞DOuter diameter of wireFor example, for the existing JKLYJ-240 wire, the outer diameter of the wire is 32mm, the inner diameter of the sleeve hole 4 is 40mm, and the wire can be designed according to actual requirements, so that the wire with each wire diameter can be placed in the hard insulating sleeve 1.
As shown in fig. 10 to 14, the insulating presser 2 is in the form of a strip, and the length direction thereof is arranged along the length direction of the overhead conductor stub. The insulating press 2 is arranged in parallel in the sleeve hole 4 of the hard insulating sleeve 1 and can move along the distribution direction of the upper end and the lower end of the hard insulating sleeve 1. The cross-sectional shape of the insulating presser 2 is arcuate, and generally semicircular. The middle part of the arc surface of the insulating presser 2 is provided with a presser screw hole 8 corresponding to the sleeve screw hole 5. The thickness of the insulating presser 2 is based on the working strength which does not cause breakdown between the upper layer and the lower layer of the insulating performance of the component and meets the actual requirement.
On the outer surface of the arc-shaped surface of the insulating presser 2, a plurality of insulating presser 2 creepage sawteeth for increasing creepage distance are arranged along the length direction. And the outer surface of the insulating presser 2 contacting with the overhead conductor wire end, that is, the plane bottom surface of the insulating presser 2, is provided with a presser tooth mouth 10 for increasing friction force.
On the sections of the hard insulating sleeve 1 and the insulating press 2, the aperture of the inner wall of the sleeve hole 4 is larger than the outer diameter of the insulating press 2, for example, the difference is 10mm, so that the sleeve creepage distance sawtooth 6 and the press creepage distance sawtooth 9 can be respectively designed on the inner wall of the sleeve hole 4 and the outer surface of the insulating press 2, as shown in fig. 9 and fig. 14, respectively, the conductive creepage distance is increased by reasonably designing the number and the tooth height of the sleeve creepage distance sawtooth 6 and the press creepage distance sawtooth 9, and for the hard insulating sleeve 1, the sum of the nearest wire diameters from a1 point to a2 point is required to be larger than 15cm in the same vertical section; for the insulating presser 2, the sum of the nearest line diameters from the point B1 to the point B2 is required to be more than 15cm in the same vertical section.
As shown in fig. 15, the radial dimension of the insulating bolt 3 is matched with the dimensions of the sleeve screw hole 5 and the presser screw hole 8, the middle part of the insulating bolt 3 is in threaded connection with the sleeve screw hole 5, one end of the insulating bolt 3 is in threaded connection with the presser screw hole 8, and the screw head of the insulating bolt 3 is located outside the hard insulating sleeve 1. The length of the insulating bolt 3 is based on the fact that the insulating performance of the part is not subjected to head-to-screw rod bottom breakdown, and the requirements of working strength and screwing depth meeting actual requirements are met. The insulating bolt 3 is also provided with scale marks for indicating the relative position between the insulating bolt and the insulating presser 2. When the bolt is rotated outwards, if the scale mark is seen, the user is warned that the insulating presser 2 and the connected screw rod are about to be separated.
Hard insulating materials such as epoxy resin are used as insulating materials of all parts of the insulating sleeve head, and the insulating property meets the requirement of 10kV live working guide rule specification.
The insulating sleeve head needs to be matched with an insulating blanket for use, and the specific use mode is as follows: the rotary insulating bolt 3 drives the insulating presser 2 to move upwards, so that an accommodating space is formed between the lower surface of the insulating presser 2 and the middle part and the lower end of the sleeve hole 4, the head of the overhead conductor is inserted into the accommodating space along the length direction of the hard insulating sleeve 1 and the insulating presser 2, then the rotary insulating bolt 3 rotates reversely to drive the insulating presser 2 to move downwards to realize self-tightening, and the insulating presser 2 compresses and fixes the head of the overhead conductor. The tooth mouths designed at the contact positions of the bottom of the insulating presser 2 and the bottom of the inner surface of the hard insulating sleeve 1 and the head of the overhead conductor can increase friction, and the frictional resistance is increased after the screwed insulating presser 2, the head of the overhead conductor and the tooth mouths are accepted, so that the conductor is prevented from falling off. Each insulating part ensures that the live wire in the sleeve is not punctured, and the sufficient size of the sleeve and the creepage distance of each sawtooth prevent the current leakage of the wire. And finally, wrapping an insulating blanket outside the insulating sleeve head on which the overhead conductor wire head is fixed. The hard sleeve head can prevent the insulating sleeve from being scratched by the sharp edge of the wire, thereby effectively protecting the insulating blanket. When the insulating blanket is wrapped outside the insulating sleeve head, the non-cylindrical sleeve head can be matched with the insulating clamp to be wrapped and clamped, and the insulating blanket is prevented from falling off. Therefore, the insulating sleeve head is matched with the insulating blanket for use, and the insulating protection effect can be effectively improved.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (1)
1. The utility model provides an insulating pullover for fixed electrified overhead conductor end of a thread, its characterized in that: the insulation sleeve head comprises a hard insulation sleeve with a sleeve hole used for being inserted into the overhead conductor wire head, an insulation presser movably arranged in the sleeve hole and used for being matched with the hard insulation sleeve to press the overhead conductor wire head tightly, and an insulation bolt used for driving the insulation presser to move, wherein the length direction of the hard insulation sleeve and the length direction of the insulation presser are both arranged along the length direction of the overhead conductor wire head, a sleeve screw hole is formed in the pipe wall of the hard insulation sleeve, a presser screw hole is formed in the insulation presser, the middle part of the insulation bolt is in threaded connection with the sleeve screw hole, and one end of the insulation bolt is in threaded connection with the presser screw hole;
a plurality of casing creepage distance sawteeth for increasing creepage distance are arranged on the local inner wall of the casing hole along the length direction, a casing tooth mouth for increasing friction force is arranged on the local inner wall of the casing hole, which is in contact with the overhead conductor head, and the depth of the casing hole is greater than the sum of the length of an exposed core in the overhead conductor head and the set length allowance; a plurality of insulating presser creepage saw teeth for increasing creepage distance are arranged on the insulating presser along the length direction of the insulating presser, and a presser tooth mouth for increasing friction force is arranged on the outer surface of the insulating presser, which is in contact with the wire head of the overhead conductor; the insulating bolt is provided with a scale mark for indicating the relative position between the insulating bolt and the insulating presser, and the insulating sleeve head is wrapped by an insulating blanket;
the cross section shape of the hard insulating sleeve and the cross section shape of the sleeve hole are both closed graphs formed by two parallel straight line sections and arc line sections respectively arranged at two ends of the straight line sections; the cross section of the insulating presser is in an arc shape;
the sleeve screw hole is arranged in the middle of the arc-shaped pipe wall of the hard insulating sleeve, the sleeve creepage distance sawteeth are arranged on the inner wall of the upper end of the sleeve hole and positioned at two sides of the sleeve screw hole, and the sleeve tooth opening is arranged on the inner wall of the lower end of the sleeve hole; the insulating press is arranged in the sleeve hole of the hard insulating sleeve in parallel and can move along the distribution direction of the upper end and the lower end of the hard insulating sleeve; the insulator pressing device comprises an insulating pressing device, a sleeve pipe, a screw hole, a sawtooth and a pressing tooth hole, wherein the pressing tooth hole is arranged in the middle of the arc-shaped surface of the insulating pressing device and corresponds to the sleeve pipe screw hole, the insulating pressing device is arranged on the outer surface of the arc-shaped surface of the insulating pressing device in a climbing distance mode, and the pressing tooth hole is formed in the plane bottom surface of the insulating pressing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011312802.8A CN112490992B (en) | 2020-11-20 | 2020-11-20 | Insulating sleeve head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011312802.8A CN112490992B (en) | 2020-11-20 | 2020-11-20 | Insulating sleeve head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112490992A CN112490992A (en) | 2021-03-12 |
| CN112490992B true CN112490992B (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011312802.8A Active CN112490992B (en) | 2020-11-20 | 2020-11-20 | Insulating sleeve head |
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| Country | Link |
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| CN (1) | CN112490992B (en) |
Citations (9)
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| CN103594960A (en) * | 2013-09-24 | 2014-02-19 | 国家电网公司 | Anti-falling device for wire shield |
| CN107328966A (en) * | 2017-06-09 | 2017-11-07 | 国网辽宁省电力有限公司朝阳供电公司 | A kind of power cable insulation experiment sleeve and application method |
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| KR20190029188A (en) * | 2017-09-12 | 2019-03-20 | 엘에스전선 주식회사 | Connecting Structure of Power Cable Conductor, Connecting Method Of The Same and Connecting Device Of The Same |
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| CN209088513U (en) * | 2018-11-23 | 2019-07-09 | 云南电网有限责任公司红河供电局 | A kind of self-tightening type wire insulation pullover |
| KR102024669B1 (en) * | 2019-07-05 | 2019-09-25 | 우주종합엔지니어링 주식회사 | Fixing device of insulator for aerial line |
| CN209692310U (en) * | 2019-05-31 | 2019-11-26 | 唐明浪 | Low-voltage insulation Wire termination wire clamp |
| CN211830020U (en) * | 2020-02-25 | 2020-10-30 | 云南电网有限责任公司保山供电局 | Insulating parcel device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000037027A (en) * | 1998-07-16 | 2000-02-02 | Fujikura Ltd | Terminal main part for power cable terminal insulating |
| JP4268745B2 (en) * | 2000-09-01 | 2009-05-27 | 名伸電機株式会社 | Electric wire insulation protective tube terminal fixture |
| CN208015345U (en) * | 2018-03-29 | 2018-10-26 | 国家电网公司 | The wire insulation pullover of electric energy meter is replaced for scene |
| CN209625934U (en) * | 2019-05-29 | 2019-11-12 | 河北硅谷化工有限公司 | Bracket insulator insulating sleeve |
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2020
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594960A (en) * | 2013-09-24 | 2014-02-19 | 国家电网公司 | Anti-falling device for wire shield |
| CN107328966A (en) * | 2017-06-09 | 2017-11-07 | 国网辽宁省电力有限公司朝阳供电公司 | A kind of power cable insulation experiment sleeve and application method |
| CN107370068A (en) * | 2017-06-29 | 2017-11-21 | 国网山东省电力公司菏泽供电公司 | One kind insulation encapsulating instrument |
| KR20190029188A (en) * | 2017-09-12 | 2019-03-20 | 엘에스전선 주식회사 | Connecting Structure of Power Cable Conductor, Connecting Method Of The Same and Connecting Device Of The Same |
| CN208904554U (en) * | 2018-10-29 | 2019-05-24 | 福建省能源服务有限公司 | A kind of pullover being dielectrically separated from for conducting wire the end of a thread metal exposed part |
| CN209088513U (en) * | 2018-11-23 | 2019-07-09 | 云南电网有限责任公司红河供电局 | A kind of self-tightening type wire insulation pullover |
| CN209692310U (en) * | 2019-05-31 | 2019-11-26 | 唐明浪 | Low-voltage insulation Wire termination wire clamp |
| KR102024669B1 (en) * | 2019-07-05 | 2019-09-25 | 우주종합엔지니어링 주식회사 | Fixing device of insulator for aerial line |
| CN211830020U (en) * | 2020-02-25 | 2020-10-30 | 云南电网有限责任公司保山供电局 | Insulating parcel device |
Also Published As
| Publication number | Publication date |
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| CN112490992A (en) | 2021-03-12 |
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