CN102340120A - Structure for preventing flashover of power transmission circuit caused by windage yaw - Google Patents
Structure for preventing flashover of power transmission circuit caused by windage yaw Download PDFInfo
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- CN102340120A CN102340120A CN2011103155867A CN201110315586A CN102340120A CN 102340120 A CN102340120 A CN 102340120A CN 2011103155867 A CN2011103155867 A CN 2011103155867A CN 201110315586 A CN201110315586 A CN 201110315586A CN 102340120 A CN102340120 A CN 102340120A
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- windage yaw
- transmission line
- suspension insulator
- lead
- damping system
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Abstract
The invention provides a structure for preventing flashover of a power transmission circuit caused by windage yaw. The method is characterized in that: insulating bars (4, 5) and wire clips (6, 7) are arranged on conductors (2, 3) on the left and right of a suspension string (1) respectively; a damping system (8) is arranged between the wire clips (6, 7), and is hinged with the wire clips (6, 7) through a pull rod (9) for absorbing the vibration energy of the conductors on two sides, so that the aim of inhibiting horizontal and torsional vibration of the conductors is achieved; and a T-shaped tip (10) is arranged on the hardware at the end of the suspension string (1), and is provided with a bolt hole (12) which is used for connecting a tower crossarm (11) to enlarge the contact surface of connection, so that the suspension string and the tower crossarm are connected stably, and the toque is reduced. According to the structure, the vibration energy of the conductors can be effectively absorbed, the torque generated by galloping of conductors to the end of the suspension string is effectively reduced, and the windage yaw trend of the suspension string is reduced. The structure has the advantages of simple structure, low cost, long service life, good windage yaw prevention effect and easiness in realization, and is suitable for the requirement of windage yaw prevention of the suspension string of a tangent tower of an overhead power transmission circuit.
Description
Technical field
The present invention relates to a kind of structure that prevents transmission line windage yaw flashover, particularly relate to a kind of windage yaw flashover method that prevents the tangent tower suspension insulator, belong to electricity overhead power transmission line resist technology field.
Background technology
In recent years; The transmission line windage yaw flashover fault showed increased that causes by the high wind heavy rain; Usually reclosing is difficult for successfully after the windage yaw flashover taking place; Caused serious harm for safety, the stable operation of electrical network, and the generation of windage yaw is often with strong wind and thunderstorm phenomenon, to failure judgment and search and bring very big difficulty.
The windage yaw flashover is under the various unfavorable conditions in the external world, to cause the spatial joint clearance distance between transmission line upper conductor and the shaft tower to reduce, and just disruptive discharge can take place during high working voltage when the electrical strength of this gap distance can not tolerate system.Continuingly act on transmission pressure when wind carries, be prone to cause the lead windage yaw, i.e. conductor galloping.Conductor galloping is actually a kind of vertical, level of complicacy and the three-dimensional motion of reversing; Its mechanism is considered to: do the time spent when lead receives crosswind force; Produce upwards (a descending) acceleration movement, promptly except moving both vertically, also make lead receive the effect of an aerodynamics moment and produce and reverse and swing; When the Frequency Synchronization of the perpendicular motion of frequency of twist motion, will produce conductor galloping and swing.The big the maximum of general amplitude surpasses 10m, shows on the shaft tower fixing point to be: along the torsionoscillation with horizontal path of waving of line direction, this is a major reason that very easily causes the circuit windage yaw.
In order to prevent transmission line windage yaw flashover; Often take under tangent tower suspension clamp installation weight or other method to strengthen the vertical load of insulator string; Do not suppress to cause the conductor galloping or the torsionoscillation of windage yaw in fact from the source, actual effect is unsatisfactory.
Summary of the invention
In order to overcome the defective that prior art exists; The present invention proposes a kind of new transmission line windage yaw flashover structure that prevents; To reach that effective pilot is waved or torsionoscillation and reduce conductor galloping, prevent the windage yaw flashover of tangent tower suspension insulator to the big moment that ball-eye place in the prior art produces.
For solving the problems of the technologies described above, the present invention is achieved in that
A kind of transmission line windage yaw flashover structure that prevents; Comprise the suspension insulator 1 that hangs on suspention lead on the iron tower of power transmission line cross-arm; It is characterized in that: between the both sides lead of described suspension insulator, one-sided or the both sides lead is provided with vibration insulating system: on the lead at interval a determining deviation be provided with two wire clamps and clamp lead; Be provided with damping system 8 between two wire clamps, damping system two ends and two wire clamps are hinged.
On the basis of the above, the present invention can also do further improvement:
The end gold utensil of described suspension insulator 1 is provided with " T " shape termination, and " T " shape termination has bolt hole and is connected with the iron tower cross-arm.
Also be separately installed with conductor spacer on the both sides lead of described suspension insulator.
Described wire clamp is made up of two intermediate plates, and two intermediate plates are fixed through Bolt Connection.
Described conductor spacer is standard type damp type or non-damp type conductor spacer, and two conductor spacers are identical from the distance of suspension insulator, are 500-800mm.
Wire clamp between the described both sides lead that strides across suspension insulator is identical from the distance of suspension insulator, is 2000-3000mm.
Described damping system 8 two ends are through pull bar 9 and two wire clamps 6, hinged between 7.
Described damping system 8 is spring-damper, viscoelastic damper, air damper or the composite damping system that constitutes arranged side by side between them.Preferred viscoelastic damper is arranged side by side with air damper, and absorption is waved energy along what lead passed over.
Described air damper is made up of the uncovered big sleeve pipe of an end and the small casing of closed at both ends, and the opening end of the arrogant sleeve pipe of said small casing inserts, the gap formation damping air flue between the inwall of the outer wall of small casing and big sleeve pipe.
At suspension insulator 1 left and right sides lead 2,3 difference installation interval rod 4,5 and wire clamps 6,7; Wire clamp 6, be provided with damping system 8 between 7; Damping system 8 forms hinged through pull bar 9 and wire clamp 6,7; Be used to absorb the vibrational energy of both sides lead, reach the purpose that suppresses lead level and twisting vibration; Simultaneously, suspension insulator 1 end gold utensil is provided with " T " shape termination 10, and " T " shape termination 10 has and is used for the bolt hole 12 that is connected with iron tower cross-arm 11, increases the contact-making surface that connects, and suspension insulator is connected with the iron tower cross-arm stablizes and minimizing moment.One aspect of the present invention effectively absorbs the conductor vibration energy, effectively reduces the moment that conductor galloping is produced the suspension insulator end on the other hand, reduces suspension insulator windage yaw trend; Simple in structure; Cost is low, long service life, and anti-windage yaw is effective; The anti-windage yaw demand that is fit to overhead transmission line tangent tower suspension insulator is prone to realize.
Suspension insulator of the present invention left and right sides lead installation interval rod and wire clamp; Between two wire clamps, be provided with damping system; The composite damping system that preferred viscoelastic damper of damping system and air damper constitute side by side; Make full use of viscoelastic damper dependable performance, economical and practical, air damper air compression property is big, can bear big displacement and the characteristics of damping can be provided in vertical direction and horizontal direction simultaneously; Simultaneously, damping system and wire clamp are designed to articulated structure, and its mechanical characteristic is two power bars; Only bear and stretch and compressive load, like this when the vibrational energy on the lead is delivered to damping system with regard to system to the stretching and the compression of system support mechanism, the formation system is to the absorption of vibrational energy; Effectively reduce the transmission of vibrational energy to lead; Reach the purpose that suppresses conductor galloping, conductor spacer 4,5 is identical from the distance of suspension insulator, is 500-800mm; The both sides lead forms a fixed body near making suspension insulator, stops the progressive wave of lead to advance.Insulator string end gold utensil is provided with " T " shape termination, and " T " shape termination has and is used for the bolt hole that is connected with the iron tower cross-arm, increases the contact-making surface that connects.One aspect of the present invention effectively absorbs conductor galloping or torsionoscillation energy; Effectively reduce the big moment that conductor galloping produces ball-eye place, suspension insulator end in the prior art on the other hand, simple in structure, cost is low; Long service life; Anti-windage yaw is effective, is fit to the anti-windage yaw demand of overhead transmission line tangent tower suspension insulator, is prone to realize.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain:
Fig. 1 is that the present invention prevents transmission line windage yaw flashover method embodiment one structural representation;
Fig. 2 is that the present invention prevents transmission line windage yaw flashover method embodiment two structural representations;
Fig. 3 is that the present invention prevents transmission line windage yaw flashover method embodiment three structural representations;
Fig. 4 is a wire clamp sketch map of the present invention;
Fig. 5 is the composite damping system sketch map that viscoelastic damper of the present invention and air damper constitute side by side;
Fig. 6 is the structural representation of suspension insulator of the present invention end;
Fig. 7 is the composite damping system sketch map that the series connection of 3 spring-dampers of the present invention constitutes with air damper more side by side;
Fig. 8 is a viscoelastic damper sketch map of the present invention;
Fig. 9 is an air damper sketch map of the present invention;
Figure 10 is a spring-damper sketch map of the present invention;
Picture in picture number expression: the 1st, suspension insulator, the 2nd, left side lead; The 3rd, the right side lead; The 4th, the left side conductor spacer; The 5th, the right side conductor spacer; The 6th, the left side wire clamp; The 7th, the right side wire clamp; The 8th, damping system; The 9th, pull bar; The 10th, " T " shape termination; The 11st, the iron tower cross-arm; The 12nd, bolt hole.
Embodiment
Embodiment one
Fig. 1 is that the present invention prevents transmission line windage yaw flashover method embodiment one structural representation.
As shown in Figure 1; On the lead 2,3 of 500mm, be mounted with damp type conductor spacer 4,5 respectively, left and right sides wire clamp 6 in suspension insulator 1 left and right sides; 7 to be installed in from suspension insulator respectively be on the left and right sides lead of 2.0m; Between the both sides lead of suspension insulator or the both sides lead is provided with vibration insulating system, promptly be provided with damper system 8 between the wire clamp of the left and right sides, realize hinge-coupled through pull bar 9 between damping system and the left and right sides wire clamp; Suspension insulator 1 end gold utensil is provided with " T " shape termination 10, and " T " shape termination 10 has and is used for the bolt hole 12 that is connected with iron tower cross-arm 11.
Accompanying drawing 4 is wire clamp structural representations of the present invention.Wire clamp 6,7th is made up of two intermediate plates, and two intermediate plates are fixed through Bolt Connection.
Fig. 2 is that the present invention prevents transmission line windage yaw flashover method embodiment two structural representations.
Non-damp type conductor spacer 4; 5 are separately fixed at suspension insulator 1 left and right sides on the lead 2,3 of 800mm; Left and right sides wire clamp 6,7 is installed in respectively from suspension insulator 1 distance and is the left and right sides lead 2,3 of 2.5m; Damping system 8 is articulated on the left and right sides wire clamp 5,6 through pull bar 9, and insulator string 9 end gold utensils are provided with " T " shape termination 10, and " T " shape termination 10 has and is used for the bolt hole 12 that is connected with iron tower cross-arm 11.
Damping system is the composite damping system that the series connection of 3 spring-dampers constitutes with air damper more side by side, shown in accompanying drawing 7.
Left and right sides wire clamp 6,7 and insulator string end construction are with embodiment 1.
Fig. 3 is that the present invention prevents transmission line windage yaw flashover method embodiment three structural representations.
On suspension insulator 1 left and right sides lead 1,2, fixing respectively two pairs of vibration insulating systems of forming by wire clamp 5,6 and damping system 8, two couples of vibration insulating system interval 2.5m.
Damping system is viscoelastic damper, air damper or spring-damper, like Fig. 8-Figure 10, or the composite damping system that constitutes side by side between them.
The foregoing description one to example three described conductor spacers 4,5 and wire clamp 6,7 and insulator string end gold utensil " T " shape termination 10 all available general machining process or casting method create, and various dampers also can create in general damper manufacturer.
It is also passable only on one-sided lead, to be provided with vibration insulating system, and structure coexists mutually, and this repeats no more.
Operation principle of the present invention is following: conductor spacer 4,5 is separately fixed at the suspension insulator left and right sides apart on the lead of 500-800mm; Form a fixed body; Make near the lead of the both sides of suspension insulator be in relative static conditions, the vibration wave energy that string on the lead is come passes to damping system 8 through wire clamp 6,7, and damping system 8 is designed to articulated structure with wire clamp 6,7; Its mechanical characteristic is two power bars; Only bear and stretch and compressive load, like this when the vibrational energy on the lead is delivered to damping system with regard to system to the stretching and the compression of system support mechanism, the formation system is to the absorption of vibrational energy; Effectively reduce the transmission of vibrational energy, reach the purpose that suppresses conductor galloping lead.The spherical link that " T " shape termination 10 of insulator string end replaces prior art helps increasing the contact-making surface of connection, makes insulator string be connected stable with the iron tower cross-arm and the minimizing moment that conductor galloping produced.
Claims (9)
1. one kind prevents transmission line windage yaw flashover structure; Comprise the suspension insulator (1) that hangs on suspention lead on the iron tower of power transmission line cross-arm; It is characterized in that: between the both sides lead of described suspension insulator (2 and 3), one-sided or the both sides lead is provided with vibration insulating system: on the lead at interval a determining deviation be provided with two wire clamps (6 and 7) and clamp lead; Be provided with damping system (8) between two wire clamps, damping system two ends and two wire clamps are hinged.
2. the transmission line windage yaw flashover structure that prevents according to claim 1, it is characterized in that: the end gold utensil of described suspension insulator (1) is provided with " T " shape termination (10), and " T " shape termination has bolt hole and is connected with iron tower cross-arm (11).
3. the transmission line windage yaw flashover structure that prevents according to claim 1 and 2 is characterized in that: also be separately installed with conductor spacer (4 and 5) on the both sides lead of described suspension insulator.
4. the transmission line windage yaw flashover structure that prevents according to claim 3, it is characterized in that: described wire clamp is made up of two intermediate plates, and two intermediate plates are fixed through Bolt Connection.
5. the transmission line windage yaw flashover structure that prevents according to claim 3 is characterized in that: described conductor spacer is standard type damp type or non-damp type conductor spacer, and two conductor spacers are identical from the distance of suspension insulator, are 500-800mm.
6. the transmission line windage yaw flashover structure that prevents according to claim 3 is characterized in that: the wire clamp between the described both sides lead that strides across suspension insulator is identical from the distance of suspension insulator, is 2000-3000mm.
7. the transmission line windage yaw flashover structure that prevents according to claim 3 is characterized in that: described damping system (8) two ends are through hinged between pull bar (9) and two wire clamps (6,7).
8. the transmission line windage yaw flashover structure that prevents according to claim 7 is characterized in that: described damping system (8) is spring-damper, viscoelastic damper, air damper or the composite damping system that constitutes arranged side by side between them.
9. a kind of transmission line windage yaw flashover method that prevents according to claim 8; It is characterized in that; Described air damper is made up of the uncovered big sleeve pipe of an end and the small casing of closed at both ends; The opening end of the arrogant sleeve pipe of said small casing inserts, the gap formation damping air flue between the inwall of the outer wall of small casing and big sleeve pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103155867A CN102340120A (en) | 2011-10-18 | 2011-10-18 | Structure for preventing flashover of power transmission circuit caused by windage yaw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103155867A CN102340120A (en) | 2011-10-18 | 2011-10-18 | Structure for preventing flashover of power transmission circuit caused by windage yaw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102340120A true CN102340120A (en) | 2012-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103155867A Withdrawn CN102340120A (en) | 2011-10-18 | 2011-10-18 | Structure for preventing flashover of power transmission circuit caused by windage yaw |
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| Country | Link |
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| CN (1) | CN102340120A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104158136A (en) * | 2014-08-27 | 2014-11-19 | 国家电网公司 | Wind deflection prevention transformation method for overhead transmission line |
| CN108512177A (en) * | 2018-05-18 | 2018-09-07 | 云南电网有限责任公司电力科学研究院 | A kind of windage yaw angle control applied to suspension insulator |
| CN109742708A (en) * | 2019-03-10 | 2019-05-10 | 国网福建省电力有限公司福州供电公司 | A kind of power transmission line wind waves device |
-
2011
- 2011-10-18 CN CN2011103155867A patent/CN102340120A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104158136A (en) * | 2014-08-27 | 2014-11-19 | 国家电网公司 | Wind deflection prevention transformation method for overhead transmission line |
| CN108512177A (en) * | 2018-05-18 | 2018-09-07 | 云南电网有限责任公司电力科学研究院 | A kind of windage yaw angle control applied to suspension insulator |
| CN109742708A (en) * | 2019-03-10 | 2019-05-10 | 国网福建省电力有限公司福州供电公司 | A kind of power transmission line wind waves device |
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| PB01 | Publication | ||
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Open date: 20120201 |