CN204230836U - A kind of damping connecting-type multiple fission conductor air flow spoiler - Google Patents
A kind of damping connecting-type multiple fission conductor air flow spoiler Download PDFInfo
- Publication number
- CN204230836U CN204230836U CN201420724739.2U CN201420724739U CN204230836U CN 204230836 U CN204230836 U CN 204230836U CN 201420724739 U CN201420724739 U CN 201420724739U CN 204230836 U CN204230836 U CN 204230836U
- Authority
- CN
- China
- Prior art keywords
- damping
- installed part
- air flow
- inner frame
- flow spoiler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000013016 damping Methods 0.000 title claims abstract description 113
- 239000004020 conductor Substances 0.000 title claims abstract description 46
- 230000004995 multiple fission Effects 0.000 title claims abstract description 27
- 238000009434 installation Methods 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 abstract description 22
- 230000005611 electricity Effects 0.000 abstract description 6
- 238000005336 cracking Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 12
- 230000006378 damage Effects 0.000 description 5
- 125000006850 spacer group Chemical group 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The utility model relates to a kind of damping connecting-type multiple fission conductor air flow spoiler, and it comprises framework and which is provided with wire clamp that is axially vertical with it and that outwards arrange; Framework is provided with inner frame, damping device on interior same plane, and described gimbal axis is to being provided with fixed leg, and described fixed leg side is wound with turbulence piece.The utility model is applicable to prevent multiple division electricity transmission line from waving, by carrying out design and reconstruction to common many cracking separation rods, effectively change flow field characteristic between multiple fission conductor and absorb conductor galloping energy, reduce transmission line galloping odds, improve the safety and reliability of circuit.
Description
Technical field
The utility model relates to a kind of power equipment gold utensil, specifically relates to a kind of damping connecting-type multiple fission conductor air flow spoiler.
Background technology
Along with growing continuously and fast of need for electricity, the quickening of electric power development speed, power industry fast development.Optimizing energy resources configuration, ensure national energy security, for national economy and social development provides high-quality, supply of electric power reliably, is that the important mission of building a harmonious socialist society is served in power industry.
On supertension line multiple division electricity transmission line wave that to have frequency low, amplitude is large, becomes the feature of one or n half waveshape in span.On typical supertension line, waving frequency is 0.15Hz ~ 1Hz, waves 0.1 ~ 1 times that amplitude is span inside conductor sag.
The extent of injury of conductor galloping depend on conductor galloping the order of severity, wave lasting time and the version of wire.The harm of transmission line galloping has: flashover causes system circuit breaker to disconnect and wire arc burn, comprises wire destructions, wire distance to the ground deficiency, steel tower loosened fastener, adds up to wave the wire that causes steel tower fatigue rupture, the fatigue rupture of strain insulator-string place, wire jumper fatigue rupture, conductor spacer and stockbridge damper damage, insulator string destruction and the effect of bundle conductor fault balanced balanced current to cause and to break stock at suspension clamp and conductor spacer place.
Power equipment many cracking separation rods stability that transmission line is widely used is poor, intensity is poor and prevent the ability of transmission line galloping also weak, far can not meet that power industry ultra high voltage is remote, the needs of Great span conveying development.For addressing these problems, need to keep higher distance to the ground when designed lines, install control and wave device, the annual line maintenance amount needed is very large, and these will expend very high expense.
Along with the development of electrical network, transmission line distribution is also more and more wider, therefore needs to provide a kind of corresponding technical scheme solving transmission line galloping.
According to flow field characteristic the technical solution of the utility model between multiple fission conductor on the basis of common many cracking separation rods, set up the better wind damping fin of energy absorption performance, provide a kind of damping connecting-type multiple fission conductor air flow spoiler, structure is simple, reduce multiple division electricity transmission line and to wave and reliable and stable.
Utility model content
The technical problems to be solved in the utility model is: provide a kind of damping connecting-type multiple fission conductor air flow spoiler, prevent multiple division electricity transmission line from waving, and improves the safety and reliability of circuit.
The utility model provides a kind of damping connecting-type multiple fission conductor air flow spoiler, and it comprises framework and which is provided with wire clamp that is axially vertical with it and that outwards arrange; It is characterized in that on interior same plane, being provided with inner frame, damping device with described framework, described gimbal axis is to being provided with fixed leg, and described fixed leg side is wound with turbulence piece.
Described inner frame is the circle or the polygon that are provided with hollow slots and fixing hole, and described fixing hole surrounds a circle, and framework is polygon or circle.
Described damping device is provided with installation component, and described installation component comprises installed part one, installed part two.
Described fixed leg is that length is greater than 450 millimeters and is less than 1200 millimeters, and diameter is greater than the cylinder that 30 millimeters are less than 50 millimeters, and described turbulence piece is the cylindrical section wires that diameter is greater than that 10 millimeters are less than 20 millimeters.
Be horizontally disposed with two groups of fixed legs in described inner frame, described fixed leg is fixed on the center of inner frame and the edge of inner frame.
Described installed part one is fixed with framework, and installed part two arranges the fixing hole connecting inner frame.
Described damping device comprises: damping lid, movement parts, damping rubber and I type bar, and described installation component comprises installed part one, installed part two, and described damping lid comprises upper cover, lower cover; Described installed part two, I type bar, damping rubber, movement parts, damping lid, damping device installed part one connect according to this.
Described installed part one is vertically fixed on lower cover.
Described movement parts one end is connected with damping lid, and the movement parts other end and damping rubber are fixed, and I type bar two ends are fixed together with damping rubber mid point and installed part two respectively.
Described damping device is symmetricly set on the radial both sides of described inner frame.
Described framework there is the through hole being parallel to its axis.
Turbulence piece, by improving multiple fission conductor conductor spacer, is arranged on conductor spacer by this patent.Turbulence piece stream field produces flow-disturbing effect, realizes the change to flow field characteristic between bundle conductor, thus reduces transmission line galloping odds.And the turbulence piece of different thicknesses can be changed according to the intensity of the wind of different geographical or different time.
With immediate prior art ratio, the beneficial effects of the utility model are:
1. turbulence piece energy absorption performance is better, structure is simple, reduce multiple division electricity transmission line wave and reliable and stable.
2. can change the turbulence piece of different thicknesses according to the intensity of different geographical or different time wind, make the multiple fission conductor air flow spoiler scope of application wider, varying environment requirement can be adapted to.
3. damp connection device produces flow-disturbing effect to the flow field in bundle conductor and absorbs conductor galloping energy, reaches and reduces transmission line galloping odds, improves the object of the safety and reliability of circuit.
4. inner frame is arranged multiple fixing hole and can play the effect of being convenient to install.
5. outside framework is provided with multiple through hole, plays the effect of saving material, reducing costs.
6. inner frame there is hollow slots, play the effect of saving material, reducing costs.
Accompanying drawing explanation
Fig. 1 is existing multiple fission conductor conductor spacer vertical view.
Fig. 2 is damping connecting-type multiple fission conductor air flow spoiler vertical view of the present utility model.
Fig. 3 is damping connecting-type multiple fission conductor air flow spoiler left view of the present utility model.
Fig. 4 is damp connection device cutaway view.
Wherein, 1-wire clamp, 2-hollow slots, 3-outside framework, 4-inner frame, 5-damping device, 6-turbulence piece, 7-fixed leg, 8-fixing hole, 9-installation component, 10-damping lid, 11-movement parts, 12-damping rubber, 13-I type bar, 14-installed part one, 15-installed part two, 16-upper cover, 17-lower cover.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Utility model example 1: as shown in Figure 2, a kind of damping connecting-type multiple fission conductor air flow spoiler in the utility model example, the utility model mainly comprises: regular hexagon framework 3 with which is provided with axially vertical with it and outside six wire clamps 1 arranged; It is characterized in that on interior same plane, be provided with dodecagon inner frame 4, four damping devices 5 with described framework 3, described framework 3 is axially provided with fixed leg 7, and described fixed leg 7 side is wound with turbulence piece 6.
Inner frame 4 is for being provided with the dodecagon of hollow slots 2 and fixing hole 8, and described fixing hole 8 surrounds a circle, and framework 3 is regular hexagon.
Damping device 5 is provided with installation component 9, described installation component 9 comprises installed part 1, installed part 2 15.
Fixed leg 7 length is 460 millimeters, and diameter is the cylinder of 35 millimeters, and described turbulence piece 6 is the cylindrical section wires of 11 millimeters.
Be horizontally disposed with two groups of fixed legs 7 in inner frame 4, described fixed leg 7 is fixed on the center of inner frame 4 and the edge of inner frame 4.
Installed part 1 is fixed with framework 3, and installed part 2 15 arranges the fixing hole connecting inner frame 4.
Damping device 5 comprises: damping lid 10, movement parts 11, damping rubber 12 and I type bar 13, and described installation component 9 comprises installed part 1, installed part 2 15, and described damping lid 10 comprises upper cover 16, lower cover 17; Described installed part 2 15, I type bar 13, damping rubber 12, movement parts 11, damping lid 10, damping device installed part 1 connect according to this.
Installed part 1 is vertically fixed on lower cover 17.
Movement parts 11 one end is connected with damping lid 10, and movement parts 11 other end and damping rubber 12 are fixed, and I type bar 13 two ends are fixed together with damping rubber 12 mid point and installed part 2 15 respectively.
Damping device 5 is symmetricly set on the described radial both sides of inner frame 4.
Framework 3 there is the through hole being parallel to its axis.
When wind is to fixed leg 7, wind produces different flow fields by turbulence piece 6 and then carries out disturbance and power consumption to windward side wire tail stream.By carrying out disturbing to bundle conductor interior flow field and consuming energy, reach the effect slowing down energy accumulation on bundle conductor, suppress the generation of waving simultaneously.
When transmission pressure bears wind load, now damping device 5 is power consumption effect, in damping device 5, I type bar 13 promotes damping rubber 12 and produces the loss of interior energy with movement parts 11 under wind drive, during use, the inertia force that I type bar 13 produces makes damping rubber 12 produce deformation and consumes transmission line galloping energy, the transmission line galloping energy be not consumed is delivered to movement parts 11 by damping rubber 12, movement parts 11 is reciprocating relative to damping lid 10, and damping anti-galloping device consumes line oscillation energy by vibration attenuation.
Utility model example 2: a kind of damping connecting-type multiple fission conductor air flow spoiler in the utility model example, the utility model mainly comprises: circular frame 3 with which is provided with axially vertical with it and outside six wire clamps 1 arranged; It is characterized in that on interior same plane, be provided with circular inner frame 4, four damping devices 5 with described framework 3, described framework 3 is axially provided with fixed leg 7, and described fixed leg 7 side is wound with turbulence piece 6.
Inner frame 4 is for being provided with the circle of hollow slots 2 and fixing hole 8, and described fixing hole 8 surrounds a circle, and framework 3 is circular.
Damping device 5 is provided with installation component 9, described installation component 9 comprises installed part 1, installed part 2 15.
Fixed leg 7 length is 800 millimeters, and diameter is the cylinder of 40 millimeters, and described turbulence piece 6 is the cylindrical section wires of 15 millimeters.
Be horizontally disposed with two groups of fixed legs 7 in inner frame 4, described fixed leg 7 is fixed on the center of inner frame 4 and the edge of inner frame 4.
Installed part 1 is fixed with framework 3, and installed part 2 15 arranges the fixing hole connecting inner frame 4.
Damping device 5 comprises: damping lid 10, movement parts 11, damping rubber 12 and I type bar 13, and described installation component 9 comprises installed part 1, installed part 2 15, and described damping lid 10 comprises upper cover 16, lower cover 17; Described installed part 2 15, I type bar 13, damping rubber 12, movement parts 11, damping lid 10, damping device installed part 1 connect according to this.
Installed part 1 is vertically fixed on lower cover 17.
Movement parts 11 one end is connected with damping lid 10, and movement parts 11 other end and damping rubber 12 are fixed, and I type bar 13 two ends are fixed together with damping rubber 12 mid point and installed part 2 15 respectively.
Damping device 5 is symmetricly set on the described radial both sides of inner frame 4.
Framework 3 there is the through hole being parallel to its axis.
When wind is to fixed leg 7, wind produces different flow fields by turbulence piece 6 and then carries out disturbance and power consumption to windward side wire tail stream.By carrying out disturbing to bundle conductor interior flow field and consuming energy, reach the effect slowing down energy accumulation on bundle conductor, suppress the generation of waving simultaneously.
When transmission pressure bears wind load, now damping device 5 is power consumption effect, in damping device 5, I type bar 13 promotes damping rubber 12 and produces the loss of interior energy with movement parts 11 under wind drive, during use, the inertia force that I type bar 13 produces makes damping rubber 12 produce deformation and consumes transmission line galloping energy, the transmission line galloping energy be not consumed is delivered to movement parts 11 by damping rubber 12, movement parts 11 is reciprocating relative to damping lid 10, and damping anti-galloping device consumes line oscillation energy by vibration attenuation.
Utility model example 3: a kind of damping connecting-type multiple fission conductor air flow spoiler in the utility model example, the utility model mainly comprises: octagon framework 3 with which is provided with axially vertical with it and outside eight wire clamps 1 arranged; It is characterized in that on interior same plane, be provided with ten hexagon inner frames, 4, four damping devices 5 with described framework 3, described framework 3 is axially provided with fixed leg 7, and described fixed leg 7 side is wound with turbulence piece 6.
Inner frame 4 is for being provided with ten hexagons of hollow slots 2 and fixing hole 8, and described fixing hole 8 surrounds a circle, and framework 3 is octagon.
Damping device 5 is provided with installation component 9, described installation component 9 comprises installed part 1, installed part 2 15.
Fixed leg 7 length is 1100 millimeters, and diameter is the cylinder of 45 millimeters, and described turbulence piece 6 is the cylindrical section wires of 18 millimeters.
Be horizontally disposed with two groups of fixed legs 7 in inner frame 4, described fixed leg 7 is fixed on the center of inner frame 4 and the edge of inner frame 4.
Installed part 1 is fixed with framework 3, and installed part 2 15 arranges the fixing hole connecting inner frame 4.
Damping device 5 comprises: damping lid 10, movement parts 11, damping rubber 12 and I type bar 13, and described installation component 9 comprises installed part 1, installed part 2 15, and described damping lid 10 comprises upper cover 16, lower cover 17; Described installed part 2 15, I type bar 13, damping rubber 12, movement parts 11, damping lid 10, damping device installed part 1 connect according to this.
Installed part 1 is vertically fixed on lower cover 17.
Movement parts 11 one end is connected with damping lid 10, and movement parts 11 other end and damping rubber 12 are fixed, and I type bar 13 two ends are fixed together with damping rubber 12 mid point and installed part 2 15 respectively.
Damping device 5 is symmetricly set on the described radial both sides of inner frame 4.
Framework 3 there is the through hole being parallel to its axis.
When wind is to fixed leg 7, wind produces different flow fields by turbulence piece 6 and then carries out disturbance and power consumption to windward side wire tail stream.By carrying out disturbing to bundle conductor interior flow field and consuming energy, reach the effect slowing down energy accumulation on bundle conductor, suppress the generation of waving simultaneously.
When transmission pressure bears wind load, now damping device 5 is power consumption effect, in damping device 5, I type bar 13 promotes damping rubber 12 and produces the loss of interior energy with movement parts 11 under wind drive, during use, the inertia force that I type bar 13 produces makes damping rubber 12 produce deformation and consumes transmission line galloping energy, the transmission line galloping energy be not consumed is delivered to movement parts 11 by damping rubber 12, movement parts 11 is reciprocating relative to damping lid 10, and damping anti-galloping device consumes line oscillation energy by vibration attenuation.
Above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; although be described in detail the utility model with reference to above-described embodiment; those of ordinary skill in the field still can modify to embodiment of the present utility model or equivalent replacement; and these do not depart from any amendment of the utility model spirit and scope or equivalent replacement, its claim of the present utility model all awaited the reply in application is protected within model.
Claims (10)
1. a damping connecting-type multiple fission conductor air flow spoiler, comprising: framework (3) with which is provided with axially vertical with it and the outside wire clamp (1) arranged; It is characterized in that on interior same plane, being provided with inner frame (4), damping device (5) with described framework (3), described framework (3) is axially provided with fixed leg (7), and described fixed leg (7) side is wound with turbulence piece (6).
2. a kind of damping connecting-type multiple fission conductor air flow spoiler as claimed in claim 1, it is characterized in that, described inner frame (4) is for being provided with circle or the polygon of hollow slots (2) and fixing hole (8), and framework (3) is polygon or circle.
3. a kind of damping connecting-type multiple fission conductor air flow spoiler as claimed in claim 1, it is characterized in that, described damping device (5) is provided with installation component (9), described installation component (9) comprises installed part one (14), installed part two (15).
4. a kind of damping connecting-type multiple fission conductor air flow spoiler as claimed in claim 1, it is characterized in that, described fixed leg (7) is less than 1200 millimeters for length is greater than 450 millimeters, diameter is greater than the cylinder that 30 millimeters are less than 50 millimeters, and described turbulence piece (6) is greater than the cylindrical section wires that 10 millimeters are less than 20 millimeters for diameter.
5. a kind of damping connecting-type multiple fission conductor air flow spoiler as claimed in claim 1, it is characterized in that, be horizontally disposed with two groups of fixed legs (7) in described inner frame (4), described fixed leg (7) is fixed on the center of inner frame (4) and the edge of inner frame (4).
6. a kind of damping connecting-type multiple fission conductor air flow spoiler as claimed in claim 3, it is characterized in that, described installed part one (14) is fixed with framework (3), and installed part two (15) arranges the fixing hole connecting inner frame (4).
7. a kind of damping connecting-type multiple fission conductor air flow spoiler as claimed in claim 1, it is characterized in that, described damping device (5) comprising: damping lid (10), movement parts (11), damping rubber (12) and I type bar (13), installation component (9) comprises installed part one (14), installed part two (15), and described damping lid (10) comprises upper cover (16), lower cover (17); Described installed part two (15), I type bar (13), damping rubber (12), movement parts (11), damping lid (10), damping device installed part one (14) connect according to this.
8. a kind of damping connecting-type multiple fission conductor air flow spoiler as claimed in claim 7, it is characterized in that, described installed part one (14) is vertically fixed on lower cover (17).
9. a kind of damping connecting-type multiple fission conductor air flow spoiler as claimed in claim 7, it is characterized in that, described movement parts (11) one end is connected with damping lid (10), movement parts (11) other end and damping rubber (12) are fixed, and I type bar (13) two ends are fixed together with damping rubber (12) mid point and installed part two (15) respectively.
10. a kind of damping connecting-type multiple fission conductor air flow spoiler as claimed in claim 1, it is characterized in that, described damping device (5) is symmetricly set on described inner frame (4) radial both sides.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201420724739.2U CN204230836U (en) | 2014-11-26 | 2014-11-26 | A kind of damping connecting-type multiple fission conductor air flow spoiler |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201420724739.2U CN204230836U (en) | 2014-11-26 | 2014-11-26 | A kind of damping connecting-type multiple fission conductor air flow spoiler |
Publications (1)
Publication Number | Publication Date |
---|---|
CN204230836U true CN204230836U (en) | 2015-03-25 |
Family
ID=52928888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201420724739.2U Active CN204230836U (en) | 2014-11-26 | 2014-11-26 | A kind of damping connecting-type multiple fission conductor air flow spoiler |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN204230836U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105633895A (en) * | 2014-11-26 | 2016-06-01 | 国家电网公司 | Damping connection type multi-split conductor current-disturbing anti-galloping device |
-
2014
- 2014-11-26 CN CN201420724739.2U patent/CN204230836U/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105633895A (en) * | 2014-11-26 | 2016-06-01 | 国家电网公司 | Damping connection type multi-split conductor current-disturbing anti-galloping device |
CN105633895B (en) * | 2014-11-26 | 2018-03-16 | 国家电网公司 | One kind damping connecting-type multiple fission conductor air flow spoiler |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN204243685U (en) | The anti-subspan oscillation conductor spacer of a kind of damping adjusting type | |
CN102684124B (en) | Five-rod lead-waving resistant power vibration absorber for transmission lines | |
CN204230837U (en) | A kind of multiple fission conductor wind damping anti-galloping device | |
CN203589658U (en) | Spring damping type interphase anti-galloping spacer | |
CN103311865A (en) | Rack-type adjusting elbow | |
CN204230836U (en) | A kind of damping connecting-type multiple fission conductor air flow spoiler | |
CN204144868U (en) | The anti-subspan oscillation conductor spacer of a kind of stiffness equivalent type | |
CN105633895A (en) | Damping connection type multi-split conductor current-disturbing anti-galloping device | |
CN204304370U (en) | A kind of multiple fission conductor air flow spoiler | |
CN204243691U (en) | A kind of damping connecting-type multiple fission conductor wind damping anti-galloping device | |
CN105281272B (en) | A kind of anti-subspan oscillation conductor spacer of stiffness equivalent type | |
CN204118656U (en) | The comprehensive device preventing wire from shaking | |
CN105703299B (en) | A kind of multiple fission conductor air flow spoiler | |
CN205595734U (en) | Annular prevents waving ware | |
CN105406430A (en) | Anti-galloping apparatus for single-circuit power transmission line | |
CN105703300A (en) | Damping connection type wind damping anti-galloping device for multi-split conductors | |
CN105281273B (en) | A kind of multiple fission conductor wind damping anti-galloping device | |
CN102306921B (en) | Break-proof method of insulator chain fracture caused by wind blowing | |
CN201829902U (en) | Preformed and rotary wire clip spacer-type double-pendulum anti-galloping device | |
CN105375427A (en) | Anti-galloping device for single-loop power transmission line | |
CN203760992U (en) | Double spring end part vibration reducing type spacing rod | |
CN101931198A (en) | Spacer rod type anti-oscillation device with preformed and rotary wire clamps | |
CN204858484U (en) | Eight division transmission line rice word formula decentralized of extra -high voltage prevent waving sub - conductor spacer system | |
CN206250730U (en) | A kind of multiple division electricity transmission line flow-disturbing antihunting device | |
CN204992488U (en) | Eight division transmission line awn star formula decentralized of extra -high voltage prevent waving sub - conductor spacer system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant |