CN110768194B - Windage yaw prevention suspension insulator string and installation method - Google Patents
Windage yaw prevention suspension insulator string and installation method Download PDFInfo
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- CN110768194B CN110768194B CN201911303563.7A CN201911303563A CN110768194B CN 110768194 B CN110768194 B CN 110768194B CN 201911303563 A CN201911303563 A CN 201911303563A CN 110768194 B CN110768194 B CN 110768194B
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- 239000012212 insulator Substances 0.000 title claims abstract description 121
- 239000000725 suspension Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000009434 installation Methods 0.000 title abstract description 7
- 230000002265 prevention Effects 0.000 title description 4
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002401 inhibitory effect Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 6
- 230000000452 restraining effect Effects 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Classifications
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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
- H02G7/14—Arrangements or devices for damping mechanical oscillations of lines, e.g. for reducing production of sound
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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
- H02G1/04—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables for mounting or stretching
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Abstract
The utility model provides a windage yaw-proof suspension insulator string and an installation method thereof, comprising two sections of insulator strings, wherein the upper end of the first section of insulator string is connected with a cross arm through a first connecting mechanism, the lower end of the first section of insulator string is connected with the second section of insulator string through a second connecting mechanism, and the lower end of the second section of insulator string is connected with a lead; the first connecting mechanism only has freedom degree in the direction along the line to limit the first section of insulator string to swing in the direction along the vertical line, and the second connecting mechanism only has freedom degree in the direction along the vertical line to limit the second section of insulator string to rotate relatively in the direction along the line. The technical effect of effectively inhibiting the windage yaw of the insulator under the condition of not setting a thread can be achieved.
Description
Technical Field
The disclosure belongs to the technical field of suspension insulator strings, and particularly relates to a wind deflection preventing suspension insulator string and an installation method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The windage yaw flashover of the transmission line is one of the main problems affecting the safe operation of the transmission line. When the transmission line has windage yaw tripping, the reclosing success rate is extremely low, the power supply reliability of the power system is seriously influenced, and huge economic loss is caused. In recent years, with the continuous development of power systems, more and more lines need to pass through complex terrains and regions with severe climatic conditions, and windage flashover accidents are obviously increased due to the change of natural conditions. Therefore, the research on the windage yaw and the precautionary measures of the power transmission line is an objective requirement for improving the power supply reliability of the power system, and has important practical significance for safe and stable operation of the power transmission line.
After a transmission line wire is influenced by strong wind, the suspension insulator of the linear tower can deflect towards the direction of a transverse line, so that the insulation gap between the wire and the tower is insufficient, flashover discharge occurs, the windage yaw fault of the transmission line is caused, and the great hidden danger is caused in the safe operation of the line. At present, the common wind deviation prevention measure of the power transmission line is to hang a weight piece or rigidly block or restrain an insulated wire on a lead or an insulator string which is easy to have wind deviation faults. Compared with patent CN201811287893.7, the scheme of restraining wire jumper windage yaw through the weight of weight, the method is simple, the operation is convenient, but along with the increase of span, height, wire section and number of splits, the gravity of weight compares littleer with wire windage load, and the effect of restraining windage yaw is very limited. Compared with patents CN201910356069.0, CN201910225182.5 and CN201821898451.1, rigid blocking or restraining insulation ropes are additionally arranged, wind deflection is restrained by rigid blocking or restraining of a lead insulator suspension string subjected to wind load, and an electric safety gap is ensured. The stress mode of the pole tower and the insulator is changed, and new potential safety hazards can be brought. Compared with patent CN201822260031.7, though keep under the original atress mode of iron tower as far as possible, reduce insulator chain's windage yaw displacement, but installed a lot of weights additional, can increase the load of shaft tower, and the complicated installation of structure is troublesome, has increased the cost.
Disclosure of Invention
The suspension insulator string with the windage yaw prevention function and the mounting method thereof are provided for solving the problems.
According to some embodiments, the following technical scheme is adopted in the disclosure:
a wind deflection preventing suspension insulator string comprises two sections of insulator strings, wherein the upper end of the first section of insulator string is connected with a cross arm through a first connecting mechanism, the lower end of the first section of insulator string is connected with the second section of insulator string through a second connecting mechanism, and the lower end of the second section of insulator string is connected with a lead;
the first connecting mechanism only has freedom degrees in the line direction to limit the first section of insulator string to swing in the vertical line direction, and the second connecting mechanism only has freedom degrees in the vertical line direction to limit the second section of insulator string to rotate relatively in the line direction.
As an alternative embodiment, the first connecting mechanism includes two suspension mechanisms, a U-shaped hanging plate and a connecting plate, two ends of the connecting plate are respectively connected to the corresponding suspension mechanisms through a U-shaped hanging plate, the suspension mechanisms are fixed on the cross arm, the U-shaped hanging plate can rotate around the direction along the line, and a first section of insulator string is arranged on the lower side of the connecting plate.
As a further limitation, the suspension mechanism comprises two fixing pieces which are oppositely arranged, one ends of the fixing pieces are fixed on the cross arm, the other ends of the fixing pieces are connected through a cross rod, the cross rod is parallel to the cross arm, the U-shaped hanging plate penetrates through the cross rod, and the smooth inner edge of the U-shaped hanging plate is in contact with the cross rod.
As a further limitation, the fixing member is an angle iron.
As a further limitation, the fixing member is connected to the cross bar by a fastening bolt.
As a further limitation, the opening of the U-shaped hanging plate is fastened on different surfaces of the connecting plate through bolts.
As a further limitation, the lower end of the connecting plate is provided with at least two threaded holes which are connected with the first section of insulator string through fastening bolts. To restrict the rotation of the insulator string in the vertical line direction.
As an optional implementation manner, the second connecting mechanism comprises a U-shaped hanging plate and a pin, an opening of the U-shaped hanging plate is fixedly connected with the lower end of the second section of the insulator string, and the pin is detachably connected with the U-shaped hanging plate.
As an alternative embodiment, the outer shell of the first section of insulator string is filled with insulating rubber; and the steel foot of the first section of insulator string is wrapped by an insulating sleeve. So as to achieve the technical effect of vibration reduction and energy consumption of the insulator string.
Based on the installation method of the insulator string, the first section of the insulator string is connected with the cross arm by using the first connecting mechanism, so that the insulator string is guaranteed to have freedom degree in the direction along the line and cannot swing in the direction vertical to the line;
the first section of insulator string and the second section of insulator string are connected by the second connecting mechanism, so that the first section of insulator string and the second section of insulator string can rotate in the vertical line direction and cannot rotate relatively in the forward line direction.
Compared with the prior art, the beneficial effect of this disclosure is:
according to the method, the first section of insulator string and the second section of insulator string are arranged, so that the radius of the clearance circle in wind deflection is reduced. The insulator string is connected with the two U-shaped hanging plates through the two hanging mechanisms, so that the insulator string can rotate along the line direction, and the first section of insulator is limited to rotate along the vertical line direction through the two bolts at the joint of the connecting plate and the insulator. And the second section of insulator string rotates relative to the first section of insulator string through the hinge joint between the two sections of insulator strings. The technical effect of effectively inhibiting the windage yaw of the insulator under the condition of no clue is achieved.
According to the insulator chain, the insulating rubber is filled in the iron cap cast iron shell, the steel feet are wrapped by the insulating sleeve to increase the damping of the insulator chain, and the technical effect of vibration reduction and energy consumption is achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
FIG. 1 is a schematic view of a structure of a suspension insulator string for preventing windage yaw;
FIG. 2 is an enlarged view of the suspension mechanism;
FIG. 3 is a side view of the connection device;
FIG. 4 is a front view of a junction between the first section of insulator string and the second section of insulator string;
FIG. 5 is a side view of the junction of the first section of insulator string and the second section of insulator string;
fig. 6 is a cross-sectional view of the insulator.
Wherein: 1 is the mechanism that hangs, 2 is U type link plate, 3 is the connecting plate, 4 is first section insulator chain, 5 is second section insulator chain, 6 is the cross arm, 7 is the pin, 8 is the bolt, 9 is first section insulator chain lower extreme, 10 is second section insulator chain upper end, 11 is the pin, 12 is the iron hat cast iron shell, 13 is the insulator full skirt, 14 is the insulating rubber packing, 15 is the steel foot, 16 is the insulating rubber cover.
The specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only relational terms determined for convenience in describing structural relationships of the parts or elements of the present disclosure, and do not refer to any parts or elements of the present disclosure, and are not to be construed as limiting the present disclosure.
In the present disclosure, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present disclosure can be determined on a case-by-case basis by persons skilled in the relevant art or technicians, and are not to be construed as limitations of the present disclosure.
The utility model provides a hang insulator chain for preventing windage yaw, has solved and has kept as far as possible under the original atress mode of iron tower, reduces the problem of insulator chain windage yaw displacement, simple structure, and the simple installation, low cost to effectively restrain insulator windage yaw under the condition of not establishing the clue.
As shown in figure 1, the suspension insulator string mainly comprises two sections of insulator strings, the upper end of the first section of insulator string (4) is connected with the cross arm (6) through a first connecting mechanism, and the connecting device limits the swinging of the insulator string in the vertical line direction. The lower end of the insulator string is connected with the upper end of the second section of insulator string (5), and the two sections of insulators can rotate relatively in the vertical line direction but are limited to rotate relatively in the direction along the line. The lower end of the second section of insulator string is connected with the lead. The method for reducing the radius of the clearance circle and increasing the damping plays a role in preventing wind deflection and vibration of the insulator string.
The suspension insulator string will be mounted on the tower cross arm (6). As shown in figure 2, two suspension mechanisms are arranged and are connected to the cross arm of the tower through bolts. The two suspension mechanisms can ensure the U-shaped suspension loop and avoid overlarge local pressure while rotating along the direction of a circuit.
In this embodiment, each suspension mechanism may be two oppositely disposed angles. One side of the angle steel is fixed on the cross arm (6), and the other side connects the two angle steels together through a cross rod. And preferably the cross bar is parallel to the cross arm (6).
Of course, in some embodiments, the cross bar may be directly replaced with a pin (7).
The two U-shaped hanging plates (2) are hung upside down on the hanging mechanism. The connecting plate (3) is fixedly connected with the U-shaped hanging plate (2) through bolts.
As shown in FIG. 3, the first section of insulator string (4) is fixedly connected with the connecting plate (3) through at least two bolts in the vertical direction so as to limit the rotation of the insulator string in the vertical line direction. The first connecting mechanism can realize the free rotation of the first section of insulator along the line direction and limit the rotation of the first section of insulator perpendicular to the line direction.
As shown in fig. 4 and 5, the lower end (9) of the first section of insulator string is a U-shaped hanging plate and is connected with the upper end of the second section of insulator through a pin (11). The upper end (10) of the second section of insulator string can rotate around the lower end (9) of the first section of insulator string in the vertical line direction, and the second section of insulator is limited to rotate around the first section of insulator in the direction along the line.
As shown in fig. 6, the iron cap is filled with insulating rubber inside the cast iron shell, and the steel leg is wrapped by a rubber sleeve with a certain thickness. The damping of the insulator string is increased, and the effects of vibration reduction and energy consumption are achieved.
When the wire is subjected to wind load, an external load in a direction perpendicular to the line is generated on the wire, and the external load causes the wire and the insulator to deflect.
In this embodiment, the entire string of insulators is divided into two parts. Only the second section of the insulator can be rotated in the direction perpendicular to the line, which greatly reduces the radius of the clearance circle. Meanwhile, the whole section of insulator can rotate along the direction of the circuit. The wind deflection displacement of the insulator string is reduced under the condition that the original stress modes of the iron tower and the insulator string are kept as much as possible. And moreover, a guy cable is not required to be additionally arranged, so that the construction is simple and convenient.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (10)
1. A wind deflection resistant suspension insulator string characterized by: the upper end of the first section of insulator string is connected with the cross arm through a first connecting mechanism, the lower end of the first section of insulator string is connected with the second section of insulator string through a second connecting mechanism, and the lower end of the second section of insulator string is connected with a lead;
the first connecting mechanism only has freedom degrees in the line direction to limit the first section of insulator string to swing in the vertical line direction, and the second connecting mechanism only has freedom degrees in the vertical line direction to limit the second section of insulator string to rotate relatively in the line direction.
2. The wind deflection resistant suspension insulator string of claim 1 wherein: the first connecting mechanism comprises two hanging mechanisms, U-shaped hanging plates and connecting plates, two ends of each connecting plate are connected to the corresponding hanging mechanisms through the U-shaped hanging plates respectively, the hanging mechanisms are fixed on the cross arms, the U-shaped hanging plates can rotate around the direction along the line, and the lower sides of the connecting plates are provided with first sections of insulator strings.
3. A wind deflection resistant suspension insulator string according to claim 2 wherein: hang the mechanism and include two mounting that set up relatively, the one end of mounting is fixed in on the cross arm, the other end is connected through a horizontal pole, the horizontal pole is parallel with the cross arm, U type link plate passes the horizontal pole sets up, and the slick and sly inner edge department of U type link plate with the horizontal pole contacts.
4. A wind deflection resistant suspension insulator string according to claim 3 wherein: the fixing piece is an angle steel.
5. A wind deflection resistant suspension insulator string according to claim 3 wherein: the fixing piece is connected with the cross rod through a fastening bolt.
6. A wind deflection resistant suspension insulator string according to claim 3 wherein: the opening of the U-shaped hanging plate is fastened on different surfaces of the connecting plate through bolts.
7. A wind deflection resistant suspension insulator string according to claim 3 wherein: the lower extreme of connecting plate is provided with two at least screw holes, all is connected with first section insulator cluster through fastening bolt.
8. The wind deflection resistant suspension insulator string of claim 1 wherein: the second connecting mechanism comprises a U-shaped hanging plate and a pin, the opening of the U-shaped hanging plate is fixedly connected with the lower end of the second section of the insulator string, and the pin is detachably connected with the U-shaped hanging plate.
9. The wind deflection resistant suspension insulator string of claim 1 wherein: insulating rubber is filled in the shell of the first section of the insulator string; and the steel foot of the first section of insulator string is wrapped by an insulating sleeve.
10. The method for mounting the insulator string according to any one of claims 1 to 9, wherein the method comprises the following steps: the first section of insulator string is connected with the cross arm by using the first connecting mechanism, so that the first section of insulator string is ensured to have freedom degree in the direction along the line and cannot swing in the direction vertical to the line;
the first section of insulator string and the second section of insulator string are connected by the second connecting mechanism, so that the first section of insulator string and the second section of insulator string can rotate in the vertical line direction and cannot rotate relatively in the forward line direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911303563.7A CN110768194B (en) | 2019-12-17 | 2019-12-17 | Windage yaw prevention suspension insulator string and installation method |
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| CN201911303563.7A CN110768194B (en) | 2019-12-17 | 2019-12-17 | Windage yaw prevention suspension insulator string and installation method |
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| CN110768194A CN110768194A (en) | 2020-02-07 |
| CN110768194B true CN110768194B (en) | 2020-10-13 |
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| CN114447862B (en) * | 2022-02-16 | 2024-07-12 | 广东电网有限责任公司 | Wind deflection prevention device for suspension insulator string |
| CN116092755B (en) * | 2022-12-28 | 2024-09-20 | 国网福建省电力有限公司 | Jumper wire insulation device of ultra-high voltage transmission line |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105337236B (en) * | 2015-11-26 | 2017-08-22 | 新疆维吾尔自治区送变电工程公司 | The windproof anchoring of ultra-high-tension power transmission line |
| CN206135369U (en) * | 2016-11-08 | 2017-04-26 | 中国能源建设集团新疆电力设计院有限公司 | Big wind zone power transmission line insulator damping device |
| CN107394733A (en) * | 2017-06-22 | 2017-11-24 | 国网新疆电力公司电力科学研究院 | Power transmission line wind servicing unit |
| CN207150123U (en) * | 2017-07-17 | 2018-03-27 | 中国能源建设集团新疆电力设计院有限公司 | Segmented wind-deviation insulator arrangement |
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