CN202503249U - Three-linear damper line for field of high voltage transmission - Google Patents
Three-linear damper line for field of high voltage transmission Download PDFInfo
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- CN202503249U CN202503249U CN2012200938812U CN201220093881U CN202503249U CN 202503249 U CN202503249 U CN 202503249U CN 2012200938812 U CN2012200938812 U CN 2012200938812U CN 201220093881 U CN201220093881 U CN 201220093881U CN 202503249 U CN202503249 U CN 202503249U
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Abstract
The utility model relates to a three-linear damper line which is used for the field of high voltage transmission. The three-linear tree damper line consists of three damper line segments, wherein both the clips on the two ends of the first damper line segment are connected to a overhead conductor; the clip on one end of the second damper line segment is connected to a lace stranded wire of the first damper line segment, while the other end is connected with the overhead conductor; the clip on one end of the third damper line segment is connected to the lace stranded wire of the second damper line segment, while the other end is connected with the overhead conductor. The novel tree damper line disclosed by the utility model has the characteristics of stable hold power, light weight and long service life, cannot wear conductors, break strands and get loose; the structure is stretched and beautiful, so that the damper line can fulfill anti-vibration requirements of low frequency and high frequency of conductors (including power lines, ground lines and optical fiber composite overhead ground wire(OPGW) optical cables) of long-span transmission lines which are higher than 35kV.
Description
[technical field]
The utility model relates to the high voltage power transmission technical field, specifically, is a kind of three line style damping wires that are used for the high voltage power transmission field.
[background technology]
The aeolian vibration of transmission line wire is to threaten one of key factor of transmission line safe operation, is the problem that line design, construction and operating management department must be paid much attention to.Because various stress can cause lead to destroy.
For example, stress has at the main stress of support place of aerial condutor: tension force, radial compression power and bending stress.And distorting stress and horizontal shear stress are very little, do not consider here.The principal element that causes above-mentioned stress is following: for example, and direct tension force from circuit; The static buckling stress that causes in the bending of a lead that dangles; Radial compression power results from: the clamping force of the bending of tension force, wire clamp, inside.Apparently, various static stress are independently each other.But, they are interrelated with a kind of mode of complicacy, and they are concentrated and to be very high radial compression power on lead.
Tension force, the tension force of lead has produced static tensile stress in lead.In steel reinforced aluminium conductor, unshapeliness ground changes the tension force of aluminum steel along with variations in temperature.When CR Critical vibration took place under the arctic weather condition, the tension force of aluminum steel maybe high 70Mpa in the time of-40 ℃, and the high-tension on the aluminum steel has increased the oneself on the conductor structure and vibrated, and then causes very serious vibration.
Static buckling stress, relevant with wire tension at the static buckling stress at suspension clamp place with the radian that dangles of lead, also relevant with the profile of the pliability of lead and wire clamp.
Extrusion stress, extrusion stress are the important component parts of stress, and in erosion process, have played great role.It rises along with the rising of the clamping force of tension force, suspension clamp liner and inside.
It is point and the contacting of point that typical multi-layer conductor leads, layer and contacting of layer begin, when producing high contact stress, point with put contact the generation plastic deformation.This impression develops along with the rising of stress that dynamic action causes.
Dynamic stress, according to the degree of oscillatory type and vibration, dynamic stress alters a great deal on value.They result from aeolian vibration, wave, the vibration of bundle conductor, the vibration that the wind pendulum produces.Fall and other the transient state pulsation of icing also can produce dynamic loads.The serious bending stress that causes acting on the strong point of waving is very big, and the big rise and big fall of tension force cause gold utensil and annex to damage along with the fatigue of lead.In addition, the alternating bending stress that vibrates from bundle conductor occurs on the either large or small plane, and it is to the not influence of static buckling stress at suspension clamp place.Can see the fatigue rupture vestige of the escapement of screw bolt-type in the zone of bundle conductor serious vibration.
By above-mentioned visible, aeolian vibration is the most general form of conductor vibration, also is simultaneously the main cause of overhead transmission line damage.When lead is waved very big dynamic deformation and tension variation will take place, so just cause lead to produce serious destruction in a short period of time.In addition, reducing stress is the key point that solves fatigue problem, and through reducing static and dynamic stress, will prolong greatly the fatigue life that lead supports gold utensil.
Tackling aeolian vibration needs the gold utensil of particular design, for example stockbridge damper, protect lines, damping wire, spiral vibration rod etc., it transmission line dangle a little on can lower stress combination very effectively.
The aeolian vibration of the lead phenomenons such as usually causing the tired disconnected thigh of lead, gold utensil damage that exceed standard threaten to the safe and stable operation of circuit.
Usually, common line is all installed stockbridge damper and is come vibrationproof, and the effectively aeolian vibration of pilot and ground wire of 1～3 stockbridge damper generally is installed.Yet; Big overhead crossing engineering is owing to characteristics such as hanging point are high, big, the of living in landform of span is open; The water surface is overhead to be formed laminar winds easily and causes that the scope of lead exciting wind speed is wide, so the more common span circuit of lead aeolian vibration wide frequency range and absorbing wind energy is much bigger, the aeolian vibration level of lead is more much bigger than common line; So the antihunting device of necessary special, otherwise the disconnected stock market affairs event of lead takes place most probably.
For example; The southeast-Nanyang, 1000KV Shanxi-Jingmen superhigh pressure experiment and demonstration engineering is successively crossed over the Yellow River and Han River; The common line lead adopts eight division patterns, and the big section of crossing over adopts six division patterns, compares with supertension line; The hanging point of lead is higher, span is bigger, the lead aeolian vibration duration is longer, therefore must pay close attention to the vibrationproof of 1000KV supertension line.
The vibrating fatigue of lead is the result of jitter accumulation effect for disconnected strand; The magnitude of vibrations of lead is generally weighed with moving bending strain; When strain is no more than a certain fixed number value, can think and disconnected burst of lead can not take place in the scope that this numerical value is exactly moving bending strain feasible value in the whole useful life of lead.Still there is not unified standard about the moving bending strain feasible value of lead in the world; But you can well imagine out different requirement to be applied to big leap and common line time-division with a kind of model lead; Strict more to the former, the aeolian vibration that is based on big span line is strong, longer duration and engineering special significance are considered.
The aeolian vibration control of 1000KV superhigh pressure common line.Usually, 1000KV superhigh pressure experiment and demonstration engineering common line adopts eight bundle conductors and damping conductor spacer is installed, because the damping conductor spacer tool
Good passive energy dissipation effect is arranged, and the moving bending strain feasible value of the aeolian vibration level of sub-conductor can suitably be controlled.
And for example, the supertension line lead of the former Soviet Union and Japan all adopts eight division patterns and conductor spacer only has been installed, and the antihunting device of other pattern is not installed.Domestic 500KV common line 4 bundle conductors are if install damping conductor spacer, then span not＞stockbridge damper generally is not installed during 500m, 1～2 stockbridge damper is installed when span＞500m.
This be because, because the average hanging point of supertension line lead is higher, the dangle moving bending strain of (strain insulator) wire clamp outlet of lead did not all exceed moving bending strain feasible value when the vibrationproof scheme was installed when about 15～70Hz, maximum moving bending strain reaches 412 * 10
-6, technical conditions requirement head and shoulders above, thus the vibration that the vibrationproof scheme suppresses lead must be installed, so that the level of vibration of lead is controlled in the safe range.
In order to control flutter failure, use following method:
1, overhanging golden tool.For preventing that conductor vibration from destroying, can adopt the way that reduces the stress of conductor on the one hand theoretically, with the autoinhibition of increase lead, but this method is unrealistic, mainly can increase the usage quantity of shaft tower, and is very uneconomical.
2, protect lines.Protecting lines is that the high-intensity aluminum-alloy wire of use rubber-like is one group by the regulation radical; Be prefabricated into spiral helicine preformed armor rods and protect lines, tightly be entangled in wire external layer, in the wire clamp of the hitch point of packing into; Its effect is the rigidity that has increased near the lead of wire clamp outlet; Reduce static state that lead bore and dynamic bending stress, stress is evenly distributed, protected lead.Yet, protect the vibration that lines can not control circuit, and only be the influence of eliminating it, protect lines in addition and can not guarantee fully that circuit under long-term serious vibration condition, fatigue rupture does not take place.
3, damper is like the aeolian vibration damper.In order to prevent that damage wires from having the vibration isolator of two kinds of forms to be used for weakening the influence of aeolian vibration, i.e. frequency modulation rate vibration isolator and impingement vibration isolator.
4, stockbridge damper.Stockbridge damper is a kind of widely used frequency modulation rate vibration isolator.The principle of stockbridge damper is; When conductor vibration; The clamping plate of stockbridge damper also move up and down with lead and since two weights have bigger inertia can not with the same moved further of clamping plate, cause the steel strand wire two ends of stockbridge damper constantly crooked up and down; Make constantly friction between the strand, consume conductor vibration and pass to its energy.
Yet stockbridge damper is not good enough to the moving bending strain value that reduces lace wire clamp place lead and the response frequency effect that changes this lace.
[utility model content]
The purpose of the utility model is to overcome the deficiency of prior art, and a kind of three line style damping wires that are used for the high voltage power transmission field are provided.
The vibrationproof principle of the utility model product is following; The lace twisted wire of tree type damping wire is as the balance wheel of stockbridge damper, and when the resonance frequency of lead and twisted wire was consistent, balance wheel was the center of circle with the lead axis then; Lace twisted wire sag tail radius; Swing back and forth along the certain angle direction, consume near the vibration of passing to the wire clamp and involve the energy that is brought, thereby vibration is weakened greatly by conductor vibration; Reach the weakening effect, can satisfy the high and low frequency vibrationproof specification requirement of the big leap lead of the above electric pressure overhead transmission line of 35kV.Vibrationproof scheme according to various different natural frequencies leads is optimized layout, just can reach the vibration-isolating effect of expection through the length of lengthening or shortening lace twisted wire.
The purpose of the utility model realizes through following technical scheme:
A kind of three line style damping wires that are used for the high voltage power transmission field is characterized in that, three line style tree type damping wires then are made up of three described damping line segments; Article one, two end terminals of damping line segment all are connected on the aerial condutor; One end terminal of its second damping line segment is connected on the lace twisted wire of article one damping line segment; The other end is connected on the aerial condutor; One end terminal of its 3rd damping line segment is connected on the lace twisted wire of second damping line segment, and the other end is connected on the aerial condutor.
Described damping linear system hangs on the aerial condutor at interval, and damping wire ties up to wire clamp of two ends difference crimping of a lace twisted wire, and said lace twisted wire is steel strand wire.
Described wire clamp is by the wire clamp metallic channel that is used for inner conductors on wire clip body, the wire clamp; Be used to cover the wire clamp gland of pressure, clamping wire, the exhibition arm with the wire clamp gland is rotationally connected is installed on the helical spring on the wire clamp; Be used for fastening helical spring bolt, nut; Online cramping lid lid presses, clamp said lead, be installed on helical spring on the wire clamp prohibited solid after, the exhibition arm embeds wire clip body, blocks fastening helical spring bolt, nut.
The central point of said wire clamp gland and exhibition arm hinge and helical spring center line are on same straight line.
Compared with prior art, the good effect of the utility model is:
The damping wire wire clamp of the utility model product is fixed by the preset load of spring locking device, therefore has the characteristics that grip is stable, easy and simple to handle, be difficult for damage wires.
It is stable that the tree type damping wire of the utility model has curable grip; To lead do not wear and tear, constantly strand, do not get loose, the characteristics of in light weight and long service life; Structure is unfolded attractive in appearance, can satisfy the above big vibrationproof requirement of crossing over transmission line wire (comprising power line, ground wire, OPGW optical cable) low frequency and high frequency of 35kV.
[description of drawings]
The user mode master that Figure 1A, B are respectively the tree type damping wire of the utility model looks and vertical view.
Fig. 2 A, B are respectively the front view and the vertical view of the tree type damping line segment of the utility model.
The wire clamp that Fig. 3 A, B are respectively the tree type damping line segment of the utility model the close front view and the cutaway view of wire clamp gland.
Fig. 4 is the key diagram after the wire clamp of the tree type damping line segment of the utility model is opened the exhibition arm.
Sketch map when Fig. 5 will close the exhibition arm for the wire clamp nut end of the tree type damping line segment of the utility model.
Among the figure, 1 is the lace twisted wire, and A is a wire clamp, and 2 is wire clip body, and 3 is the wire clamp gland, and 4 is helical spring, and 5 are the exhibition arm, and 6 is the wire clamp nut, and 7 is bolt, and 8 is pad, and 9 is tree type damping line segment, and 10 is aerial condutor, and 11 is the wire clamp metallic channel.
[embodiment]
Below provide the utility model a kind of embodiment that is used for the three line style damping wires in high voltage power transmission field.
See also accompanying drawing 1A, 1B, 2A, 2B, 3A, 3B, 4,5; The tree type damping wire that the vibrationproof of the big leap aerial condutor of a kind of 35-1000kV of being used for is used, said tree type damping wire are three line style tree type damping wires, are made up of three damping line segments 9.Said tree type damping wire ties up to a damping wire wire clamp of the two ends difference crimping A of a lace twisted wire 1, and said lace twisted wire is steel strand wire.
That is, three damping line segments are respectively uniformly-spaced to hang on the aerial condutor.
Said damping wire wire clamp A comprises: wire clip body 2 is used for the wire clamp metallic channel of inner conductors 10, the wire clamp gland 3 that be used to cover pressure, clamps said lead on the wire clamp; The exhibition arm 5 that is rotationally connected with wire clamp gland 3; Exhibition arm 5 is the both arms type, is formed with the snap fit members that is used to block said fastening helical spring bolt 7, nut 6 on it, is installed on the helical spring 4 on the wire clamp; Be used for fastening helical spring bolt 7, nut 6; Press at said wire clamp gland lid, clamp said lead, be installed on helical spring on the wire clamp prohibited solid after, said exhibition arm 5 can embed wire clip body 2, blocks said fastening helical spring bolt 7, nut 6.
Said three line style tree type damping wires then are made up of described damping line segment; Two end terminals of its article one damping line segment 9 all are connected on the aerial condutor 10; One end terminal of its second damping line segment 9 is connected on the lace twisted wire 1 of article one damping line segment; The other end is connected on the aerial condutor 10, and an end terminal of its 3rd damping line segment is connected on the lace twisted wire 1 of second damping line segment, and the other end is connected on the aerial condutor 10.For this reason, the utility model product is installed in shape on the lead as tree-shaped, so the person's of being used habituation is called tree type damping wire.
The vibrationproof principle of the utility model product is following; The lace twisted wire of tree type damping wire is as the balance wheel of stockbridge damper, and when the resonance frequency of lead and twisted wire was consistent, balance wheel was the center of circle with the lead axis then; Lace twisted wire sag tail radius; Swing back and forth along the certain angle direction, consume near the vibration of passing to the wire clamp and involve the energy that is brought, thereby vibration is weakened greatly by conductor vibration; Reach the weakening effect, can satisfy the high and low frequency vibrationproof specification requirement of the big leap lead of the above electric pressure overhead transmission line of 35kV.Vibrationproof scheme according to various different natural frequencies leads is optimized layout, just can reach the vibration-isolating effect of expection through the length of lengthening or shortening lace twisted wire.
In the present embodiment; The wire clamp of the damping wire of the utility model is to set and guarantee through the helical spring in the wire clamp being carried out loading to the grip of lead; Neither damage wires has enough lead curable grips again, and can not influence the curable grip of wire clamp to lead because of the climatic environment variation of temperature.
Tree type damping wire according to present embodiment; It is easy and simple to handle; Need only lead be placed in the wire clamp metallic channel during installation, the wire clamp gland that on wire clip body, closes is incorporated into wire clip body to the exhibition arm and installs in the helical spring sleeve pipe behind the assigned position; With special tool(s) nut is unscrewed and to be disassembled or fastening, wire clamp has produced constant curable grip immediately to lead.
In addition, in the present embodiment, said damping wire wire clamp, the axial line of its sleeve pipe, i.e. wire casing axial line between wire clamp axial line, and wire clip body and wire clamp gland, i.e. the axis oblique angle [alpha] of aerial condutor=10 °.
In the present embodiment; Sleeve pipe and wire clip body cast solid; Wire clip body one end and the wire clamp gland pin of said damping wire wire clamp are hinged; Being linked in sequence in the other end sleeve pipe is provided with bolt, helical spring, nut, and said exhibition arm embeds sleeve pipe two side inwalls with both arms shape, blocks helical spring and bolt, nut.
Tree type damping wire wire clamp according to the utility model is characterized in that, the center line of the axial line of said wire clamp gland and exhibition arm hinge, axial line, helical spring and the pad of bolt at grade.
The above only is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model design; Can also make some improvement and retouching, these improvement and retouching also should be regarded as in the protection range of the utility model.
Claims (4)
1. three line style damping wires that are used for the high voltage power transmission field is characterized in that, three line style tree type damping wires then are made up of three described damping line segments; Article one, two end terminals of damping line segment all are connected on the aerial condutor; One end terminal of its second damping line segment is connected on the lace twisted wire of article one damping line segment; The other end is connected on the aerial condutor; One end terminal of its 3rd damping line segment is connected on the lace twisted wire of second damping line segment, and the other end is connected on the aerial condutor.
2. a kind of three line style damping wires that are used for the high voltage power transmission field as claimed in claim 1; It is characterized in that; Described damping linear system hangs on the aerial condutor (10) at interval, and damping wire ties up to wire clamp of two ends difference crimping of a lace twisted wire (1), and said lace twisted wire is steel strand wire.
3. a kind of three line style damping wires that are used for the high voltage power transmission field as claimed in claim 1; It is characterized in that described wire clamp is used to cover the wire clamp gland (3) of pressure, clamping wire by the wire clamp metallic channel (11) that is used for inner conductors (10) on wire clip body (2), the wire clamp; The exhibition arm (5) that is rotationally connected with the wire clamp gland; Be installed on the helical spring (4) on the wire clamp, be used for fastening helical spring bolt (7), nut (6), online cramping lid lid presses, clamp said lead, be installed on helical spring on the wire clamp prohibited solid after; The exhibition arm embeds wire clip body, blocks fastening helical spring bolt, nut.
4. a kind of three line style damping wires that are used for the high voltage power transmission field as claimed in claim 3 is characterized in that, the central point of said wire clamp gland and exhibition arm hinge and helical spring center line are on same straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200938812U CN202503249U (en) | 2012-03-13 | 2012-03-13 | Three-linear damper line for field of high voltage transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200938812U CN202503249U (en) | 2012-03-13 | 2012-03-13 | Three-linear damper line for field of high voltage transmission |
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| Publication Number | Publication Date |
|---|---|
| CN202503249U true CN202503249U (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200938812U Expired - Lifetime CN202503249U (en) | 2012-03-13 | 2012-03-13 | Three-linear damper line for field of high voltage transmission |
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| Country | Link |
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| CN (1) | CN202503249U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852337A (en) * | 2014-02-13 | 2015-08-19 | 中国电力工程顾问集团公司 | Wire vibration-proof system |
| CN105720541A (en) * | 2014-12-04 | 2016-06-29 | 国家电网公司 | V-shaped damping-wire clamp damping wire |
| CN105720542A (en) * | 2014-12-04 | 2016-06-29 | 国家电网公司 | Musical-scale type damping wire |
-
2012
- 2012-03-13 CN CN2012200938812U patent/CN202503249U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852337A (en) * | 2014-02-13 | 2015-08-19 | 中国电力工程顾问集团公司 | Wire vibration-proof system |
| CN105720541A (en) * | 2014-12-04 | 2016-06-29 | 国家电网公司 | V-shaped damping-wire clamp damping wire |
| CN105720542A (en) * | 2014-12-04 | 2016-06-29 | 国家电网公司 | Musical-scale type damping wire |
| CN105720542B (en) * | 2014-12-04 | 2017-09-01 | 国家电网公司 | A kind of scale formula damping wire |
| CN105720541B (en) * | 2014-12-04 | 2017-09-01 | 国家电网公司 | A kind of V-arrangement dump wire clamp damping wire |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 200122, 1122 deep road, Pudong New Area, Shanghai Patentee after: STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER Co. Patentee after: Shanghai Dianwu Asset Management Co.,Ltd. Address before: 200122, 1122 deep road, Pudong New Area, Shanghai Patentee before: SHANGHAI MUNICIPAL ELECTRIC POWER Co. Patentee before: SHANGHAI ELECTRIC POWER EQUIPMENT COLLECTIVE ASSETS MANAGEMENT Co.,Ltd. Address after: 200122, 1122 deep road, Pudong New Area, Shanghai Patentee after: STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER Co. Patentee after: SHANGHAI ZHUORUN ASSET MANAGEMENT Co.,Ltd. Address before: 200122, 1122 deep road, Pudong New Area, Shanghai Patentee before: STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER Co. Patentee before: Shanghai Dianwu Asset Management Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210520 Address after: 1122 Yuanshen Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai, 200122 Patentee after: STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER Co. Patentee after: SHANGHAI HENGNENGTAI ENTERPRISE MANAGEMENT Co.,Ltd. Address before: 200122, 1122 deep road, Pudong New Area, Shanghai Patentee before: STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER Co. Patentee before: SHANGHAI ZHUORUN ASSET MANAGEMENT Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121024 |