CN101527441A - Deicer for overhead transmission lines - Google Patents
Deicer for overhead transmission lines Download PDFInfo
- Publication number
- CN101527441A CN101527441A CN200910301757A CN200910301757A CN101527441A CN 101527441 A CN101527441 A CN 101527441A CN 200910301757 A CN200910301757 A CN 200910301757A CN 200910301757 A CN200910301757 A CN 200910301757A CN 101527441 A CN101527441 A CN 101527441A
- Authority
- CN
- China
- Prior art keywords
- deicer
- transmission lines
- overhead transmission
- base
- motor
- 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.)
- Pending
Links
Images
Abstract
The invention discloses a deicer for overhead transmission lines, comprising a deicer, a running gear, a clamping device and an obstacle-detouring device. The obstacle-detouring device is arranged on a base device between two clamping devices, the base device is arranged on a lead rail, the running gear is connected with the deicer by a support plate, and the clamping device is arranged on the base device. The deicer for overhead transmission lines of the invention can walk along the route of the overhead transmission lines and deice, and can carry out automatic obstacle-detouring when encountering ordinary obstacles such as suspension clamps, shockproof hamers, wire Comps, etc.; in addition, the deicer features high deicing efficiency without being restricted by surrounding environment and weather, thus greatly reducing labor intensity and being capable of reaching routes beyond human reach to carry out deicing and enjoying safe operation and low energy consumption.
Description
Technical field
The present invention relates to a kind of deicer, particularly a kind of device that is used to remove icing on the overhead transmission line.
Background technology
2008 the beginning of the year China south met with serious ice and snow natural calamity, the transmission system of some areas is by heavy damage.The inhomogeneous icing of transmission line and do not deice phenomenons such as caused conductor galloping the same period and can cause accidents such as line tripping, power failure; When icing is serious in addition can cause that shaft tower tilts, collapses, substantial risk accidents such as broken string and insulator arc-over take place.Because bad weather when the ice and snow disaster takes place, cause easily that traffic is obstructed, communicating interrupt, make that repairing is very difficult, thereby often cause electric power system to repair, the long-time power failure causes very big influence for industrial and agricultural production and people's life, causes a large amount of financial resources, material resources loss.At present both at home and abroad normally used de-icing method is heating power deicing and mechanical deicing's method during the icing on removing general power transmission line, but the most effective de-icing method is the deicing of manually reaching the standard grade when serious ice trouble takes place, this de-icing method efficient is low, dangerous big, use the zone to be subjected to the restriction of factors such as surrounding environment, weather, special people's operation of can't reaching the standard grade when overhead wire is heavy grade and moves towards in the steep hills district.
Summary of the invention
Technical problem to be solved by this invention provides a kind of can the walking and the deicing operation along overhead transmission line, but and when the general barrier crossing obstacle automatically that runs on the circuit, the deicing efficiency height, be not subjected to the restriction of factors such as surrounding environment, weather, deicer for overhead transmission lines safe in utilization.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of deicer for overhead transmission lines, it is by deicer, running gear, clamping device and obstacle detouring device are formed, the obstacle detouring device install between two clamping devices on base device, base device is installed on the guide rail, and running gear is connected by supporting bracket with deicer, and clamping device is installed on the base device.
In the described deicer, cutter motor and two roll the motor connecting plate top that is installed in triangular in shape, and milling cutter and rolling wheel are installed in the connecting plate below, and the output shaft of cutter motor is connected with milling cutter, and the output shaft that rolls motor is connected with rolling wheel.
The outside of described rolling wheel is provided with thread.
Described connecting plate below is equipped with ice-melt liquid shower nozzle.
In the described running gear, two road wheels are installed on the power shaft of road wheel motor, match with power transmission line in the gap between two road wheels, and the road wheel motor is fixedly mounted on the supporting bracket.
In the described obstacle detouring device, the electric expansion cylinder is fixedly mounted on the base, and the electric expansion cylinder is provided with the support transverse slat, and forearm one end of band steering wheel is installed in by sleeve and pin and supports above the transverse slat, and the other end is connected with supporting bracket.
In the described base device, gear is installed on the base, the tooth bar that matches with gear is installed on the guide rail, gear is connected with the output of base drive motors.
In the described clamping device, electric expansion cylinder one end is installed on the base of base device. and the other end is connected with clip, and two clamping plate that constitute clip connect by guide post, matches with power transmission line in the gap between two clamping plate.
The mating surface of described clamping plate and power transmission line is made by flexible material, is provided with many springs between mating surface and the splint segment thereafter.
Deicer for overhead transmission lines provided by the invention is because it comprises device, running gear and obstacle detouring device, can walk and the deicing operation along overhead transmission line, and when the general barrier such as the suspension clamp that run on the circuit, stockbridge damper, aluminium hydraulic pressed connecting pipe etc., but crossing obstacle automatically, the deicing efficiency height is not subjected to the restriction of factors such as surrounding environment, weather, can greatly reduce labor strength, and can arrive the route that manually can not arrive and carry out deicing, safe in utilization, it is low to consume energy.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of deicer of the present invention;
Fig. 3 is the vertical view of base device of the present invention;
Fig. 4 is the structural representation of clamping device middle clamp plate of the present invention.
Embodiment
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the present invention is by deicer, running gear, clamping device and obstacle detouring device are formed, the obstacle detouring device install between two clamping devices on base device, base device is installed on the guide rail 1, running gear is connected by supporting bracket 2 with deicer, and clamping device is installed on the base device.
In the described deicer, cutter motor 3 and two roll motor 4 connecting plate 5 tops that are installed in triangular in shape, milling cutter 6 and rolling wheel 7 are installed in connecting plate 5 belows, and the output shaft of cutter motor 3 is connected with milling cutter 6, and the output shaft that rolls motor 4 is connected with rolling wheel 7.
The outside of described rolling wheel 7 is provided with thread.
Described connecting plate 5 belows are equipped with ice-melt liquid shower nozzle 9.
In the described running gear, two road wheels 10 are installed on the power shaft of road wheel motor 11, match with power transmission line 12 in the gap between two road wheels 10, and road wheel motor 11 is fixedly mounted on the supporting bracket 2.
In the described obstacle detouring device, electric expansion cylinder 13 is fixedly mounted on the base 14, and electric expansion cylinder 13 is provided with and supports transverse slat 15, and forearm 17 1 ends of band steering wheel 16 are installed in by sleeve and pin and support above the transverse slat 15, and the other end is connected with supporting bracket 2.
In the described base device, gear 8 is installed on the base 14, the tooth bar 25 that matches with gear 8 is installed on the guide rail 1, gear 8 is connected with the output of base drive motors 18.
In the described clamping device, electric expansion cylinder 13 ' one end is installed on the base 14 ' of base device. and the other end is connected with clip 19, and two clamping plate 20 that constitute clip 19 connect by guide post 21, matches with power transmission line 12 in the gap between two clamping plate 20.
The mating surface 22 of described clamping plate 20 and power transmission line 12 is made by flexible material, is provided with many springs 23 between mating surface 22 and the splint segment thereafter.
During use, at first manually go up tower and remove the icing of power transmission line 12 1 sides, this deicer is placed on above the power transmission line 12, start cutter motor 3, roll motor 4 and road wheel motor 11, road wheel 10 moves on power transmission line 12 at the whole deicer of drive under the driving of road wheel motor 11, and milling cutter 6 turns round under the drive of cutter motor 3, mills out a groove on the icing above the power transmission line 12, rolling wheel 7 turns round under the drive that rolls motor 4, pulverizes icing; Under the very hard situation that is difficult to remove of icing, can control this deicer and on the very hard one section power transmission line 12 of icing, move back and forth once, if still be difficult to icing is removed, can start ice-melt liquid shower nozzle 9 icing that difficulty removes that melts away.
When running into barrier in this deicer moving process, close cutter motor 3 earlier, roll motor 4 and road wheel motor 11, clip 19 rises to power transmission line 12 left and right sides under electric expansion cylinder 13 ' drives, make two clamping plate 20 clamp power transmission line 12 by electromagnetism closing device 24 again.
Then the obstacle detouring device carries out the obstacle detouring action: at first forearm 17 rises under the drive of electric expansion cylinder 13, make road wheel 10 break away from power transmission line 12, drive forearms 17 Rotate 180s ° by steering wheel 16 again, make forearm 17 avoiding obstacles, base 14 is moving on guide rail 1 under the driving of base drive motors 18 then, forearm 17 is cleared the jumps, thereby realize the function of obstacle detouring.
After clearing the jumps, former and later two clamping devices unclamp power transmission line 12, start cutter motor 3, roll motor 4 and road wheel motor 11, and deicer integral body moves along power transmission line 12, continue the deicing operation.
The power supply of this deicer is placed on below the guide rail 1 or is placed on base 14 the insides, carries out the open and close that image recognition and various transducer are controlled each motor by the CCD camera.
For improving deicing efficiency, the obstacle detouring device of a plurality of band deicer phases can be installed on the guide rail between two clamping devices.
Claims (9)
1. deicer for overhead transmission lines, it is characterized in that: it is by deicer, running gear, clamping device and obstacle detouring device are formed, the obstacle detouring device install between two clamping devices on base device, base device is installed on the guide rail (1), running gear is connected by supporting bracket (2) with deicer, and clamping device is installed on the base device.
2. deicer for overhead transmission lines according to claim 1, it is characterized in that: in the described deicer, a cutter motor (3) and two roll motor (4) connecting plate (5) top that is installed in triangular in shape, milling cutter (6) and rolling wheel (7) are installed in connecting plate (5) below, the output shaft of cutter motor (3) is connected with milling cutter (6), and the output shaft that rolls motor (4) is connected with rolling wheel (7).
3. deicer for overhead transmission lines according to claim 2 is characterized in that: the outside of described rolling wheel (7) is provided with thread.
4. according to claim 2 or 3 described deicer for overhead transmission lines, it is characterized in that: described connecting plate (8) below is equipped with ice-melt liquid shower nozzle (9).
5. deicer for overhead transmission lines according to claim 1, it is characterized in that: in the described running gear, two road wheels (10) are installed on the power shaft of road wheel motor (11), match with power transmission line (12) in gap between two road wheels (10), road wheel motor (11) is fixedly mounted on the supporting bracket (2).
6. deicer for overhead transmission lines according to claim 1, it is characterized in that: in the described obstacle detouring device, electric expansion cylinder (13) is fixedly mounted on the base (14), electric expansion cylinder (13) is provided with and supports transverse slat (15), forearm (17) one ends of band steering wheel (16) are installed in by sleeve and pin and support above the transverse slat (15), and the other end is connected with supporting bracket (15).
7. deicer for overhead transmission lines according to claim 1, it is characterized in that: in the described base device, gear (8) is installed on the base (14), the tooth bar (25) that matches with gear (8) is installed on the guide rail (1), and gear (8) is connected with the output of base drive motors (18).
8. deicer for overhead transmission lines according to claim 1, it is characterized in that: in the described clamping device, electric expansion cylinder (13 ') end is installed on the base (14 ') of base device. and the other end is connected with clip (19), two clamping plate (20) that constitute clip (6) connect by guide post (21), match with power transmission line (12) in the gap between two clamping plate (20).
9. deicer for overhead transmission lines according to claim 8 is characterized in that: described clamping plate (20) are made by flexible material with the mating surface (22) of power transmission line (12), are provided with many springs (23) between mating surface (22) and the splint segment thereafter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910301757A CN101527441A (en) | 2009-04-22 | 2009-04-22 | Deicer for overhead transmission lines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910301757A CN101527441A (en) | 2009-04-22 | 2009-04-22 | Deicer for overhead transmission lines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101527441A true CN101527441A (en) | 2009-09-09 |
Family
ID=41095184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910301757A Pending CN101527441A (en) | 2009-04-22 | 2009-04-22 | Deicer for overhead transmission lines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101527441A (en) |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777742A (en) * | 2010-03-19 | 2010-07-14 | 湖北省电力公司宜昌夷陵区供电公司 | Robot capable of performing automatic deicing along aerial high-voltage power transmission line |
| CN102227075A (en) * | 2011-03-29 | 2011-10-26 | 重庆市电力公司超高压局 | Rapid deicing apparatus of four bundled conductors |
| CN102227066A (en) * | 2011-03-29 | 2011-10-26 | 重庆市电力公司超高压局 | Apparatus used for walking on quad bundled conductors and method for spanning spacers |
| CN102270822A (en) * | 2011-08-25 | 2011-12-07 | 三峡大学 | Robot for automatic deicing of transmission line |
| CN102332694A (en) * | 2011-08-25 | 2012-01-25 | 三峡大学 | Robot for automatically deicing for power transmission line |
| CN103138219A (en) * | 2011-11-22 | 2013-06-05 | 北京林业大学 | Automatic deicing machine of high-voltage transmission line |
| CN103474912A (en) * | 2013-09-30 | 2013-12-25 | 重庆福田电力器材有限公司 | Accumulated ice removing device for electric transmission line |
| CN103094871B (en) * | 2013-02-05 | 2015-06-17 | 桂林电子科技大学 | Anticing device of power transmission line and application method |
| CN105207158A (en) * | 2015-09-07 | 2015-12-30 | 湖南大学 | High-voltage electric wire deicing robot |
| CN105870866A (en) * | 2016-04-13 | 2016-08-17 | 三峡大学 | Single-transmission line deicing robot and method |
| CN106058774A (en) * | 2016-06-29 | 2016-10-26 | 杭州启澄科技有限公司 | High-voltage anti-icing device based on wire drawing power generation |
| CN106410725A (en) * | 2016-11-25 | 2017-02-15 | 国网河南省电力公司平顶山供电公司 | Power cable deicing device |
| CN107248710A (en) * | 2017-07-21 | 2017-10-13 | 山东大学 | A kind of step-by-step movement line walking obstacle removing robot and its method |
| CN108695804A (en) * | 2018-08-03 | 2018-10-23 | 榆林学院 | A kind of suspension running gear on icing electric wire |
| CN108767795A (en) * | 2018-06-29 | 2018-11-06 | 国网山东省电力公司济南市章丘区供电公司 | A kind of cable de-icing device |
| CN109759366A (en) * | 2019-03-04 | 2019-05-17 | 安徽理工大学 | A kind of novel high-altitude steel cable ice remover group |
| CN109950848A (en) * | 2019-02-16 | 2019-06-28 | 郑州工业应用技术学院 | Electric system elevated line deicing robot |
| CN110112687A (en) * | 2019-04-28 | 2019-08-09 | 中工国际工程股份有限公司 | A kind of overhead power transmission conducting wire deicing equipment |
| CN110429545A (en) * | 2019-07-03 | 2019-11-08 | 国网山东省电力公司济宁市任城区供电公司 | Automatic deicer and its working method in a kind of transmission line of electricity |
| CN110797823A (en) * | 2019-11-15 | 2020-02-14 | 国网山东省电力公司兰陵县供电公司 | Power supply line defroster |
| CN111162497A (en) * | 2020-01-21 | 2020-05-15 | 上海电力大学 | Single-motor-driven high-voltage wire mechanical deicing robot |
| CN112271684A (en) * | 2020-11-28 | 2021-01-26 | 贵州电网有限责任公司 | Deicing device for high-voltage cable of power distribution network |
| CN112600150A (en) * | 2020-11-05 | 2021-04-02 | 国网山东省电力公司泗水县供电公司 | Multifunctional power transmission line deicing device |
| CN115102122A (en) * | 2022-07-06 | 2022-09-23 | 国网河南省电力公司平顶山供电公司 | Deicing method for transmission line lead |
-
2009
- 2009-04-22 CN CN200910301757A patent/CN101527441A/en active Pending
Cited By (38)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777742A (en) * | 2010-03-19 | 2010-07-14 | 湖北省电力公司宜昌夷陵区供电公司 | Robot capable of performing automatic deicing along aerial high-voltage power transmission line |
| CN101777742B (en) * | 2010-03-19 | 2012-05-30 | 湖北省电力公司宜昌夷陵区供电公司 | Robot capable of performing automatic deicing along aerial high-voltage power transmission line |
| CN102227075B (en) * | 2011-03-29 | 2013-03-20 | 重庆市电力公司检修分公司 | Rapid deicing apparatus of four bundled conductors |
| CN102227075A (en) * | 2011-03-29 | 2011-10-26 | 重庆市电力公司超高压局 | Rapid deicing apparatus of four bundled conductors |
| CN102227066A (en) * | 2011-03-29 | 2011-10-26 | 重庆市电力公司超高压局 | Apparatus used for walking on quad bundled conductors and method for spanning spacers |
| CN102227066B (en) * | 2011-03-29 | 2013-06-12 | 重庆市电力公司检修分公司 | Apparatus used for walking on quad bundled conductors and method for spanning spacers |
| CN102270822A (en) * | 2011-08-25 | 2011-12-07 | 三峡大学 | Robot for automatic deicing of transmission line |
| CN102332694A (en) * | 2011-08-25 | 2012-01-25 | 三峡大学 | Robot for automatically deicing for power transmission line |
| CN102270822B (en) * | 2011-08-25 | 2013-10-02 | 三峡大学 | Robot for automatic deicing of transmission line |
| CN102332694B (en) * | 2011-08-25 | 2013-10-09 | 三峡大学 | Robot for automatically deicing for power transmission line |
| CN103138219A (en) * | 2011-11-22 | 2013-06-05 | 北京林业大学 | Automatic deicing machine of high-voltage transmission line |
| CN103094871B (en) * | 2013-02-05 | 2015-06-17 | 桂林电子科技大学 | Anticing device of power transmission line and application method |
| CN103474912A (en) * | 2013-09-30 | 2013-12-25 | 重庆福田电力器材有限公司 | Accumulated ice removing device for electric transmission line |
| CN105207158A (en) * | 2015-09-07 | 2015-12-30 | 湖南大学 | High-voltage electric wire deicing robot |
| CN105870866A (en) * | 2016-04-13 | 2016-08-17 | 三峡大学 | Single-transmission line deicing robot and method |
| CN107257118A (en) * | 2016-06-29 | 2017-10-17 | 杭州启澄科技有限公司 | A kind of wire drawing generating anti-icing equipment of high-tension bus-bar |
| CN106058774A (en) * | 2016-06-29 | 2016-10-26 | 杭州启澄科技有限公司 | High-voltage anti-icing device based on wire drawing power generation |
| CN107294041A (en) * | 2016-06-29 | 2017-10-24 | 杭州启澄科技有限公司 | The high-tension bus-bar anti-icing equipment that a kind of wire drawing generates electricity |
| CN106058774B (en) * | 2016-06-29 | 2017-11-24 | 台州环洋机电有限公司 | A kind of high-tension bus-bar anti-icing equipment to be generated electricity based on wire drawing |
| CN107294041B (en) * | 2016-06-29 | 2018-03-16 | 孙静洁 | The high-tension bus-bar anti-icing equipment that a kind of wire drawing generates electricity |
| CN107257118B (en) * | 2016-06-29 | 2018-03-23 | 孙静洁 | A kind of wire drawing generating anti-icing equipment of high-tension bus-bar |
| CN106410725B (en) * | 2016-11-25 | 2018-01-26 | 国网河南省电力公司平顶山供电公司 | A kind of electric power cable deicer |
| CN106410725A (en) * | 2016-11-25 | 2017-02-15 | 国网河南省电力公司平顶山供电公司 | Power cable deicing device |
| CN107248710A (en) * | 2017-07-21 | 2017-10-13 | 山东大学 | A kind of step-by-step movement line walking obstacle removing robot and its method |
| CN108767795A (en) * | 2018-06-29 | 2018-11-06 | 国网山东省电力公司济南市章丘区供电公司 | A kind of cable de-icing device |
| CN108695804A (en) * | 2018-08-03 | 2018-10-23 | 榆林学院 | A kind of suspension running gear on icing electric wire |
| CN109950848A (en) * | 2019-02-16 | 2019-06-28 | 郑州工业应用技术学院 | Electric system elevated line deicing robot |
| CN109759366A (en) * | 2019-03-04 | 2019-05-17 | 安徽理工大学 | A kind of novel high-altitude steel cable ice remover group |
| CN110112687A (en) * | 2019-04-28 | 2019-08-09 | 中工国际工程股份有限公司 | A kind of overhead power transmission conducting wire deicing equipment |
| CN110112687B (en) * | 2019-04-28 | 2023-12-22 | 中工国际工程股份有限公司 | Deicing equipment for overhead transmission conductor |
| CN110429545A (en) * | 2019-07-03 | 2019-11-08 | 国网山东省电力公司济宁市任城区供电公司 | Automatic deicer and its working method in a kind of transmission line of electricity |
| CN110797823A (en) * | 2019-11-15 | 2020-02-14 | 国网山东省电力公司兰陵县供电公司 | Power supply line defroster |
| CN110797823B (en) * | 2019-11-15 | 2021-01-01 | 国网山东省电力公司兰陵县供电公司 | Power supply line defroster |
| CN111162497A (en) * | 2020-01-21 | 2020-05-15 | 上海电力大学 | Single-motor-driven high-voltage wire mechanical deicing robot |
| CN112600150A (en) * | 2020-11-05 | 2021-04-02 | 国网山东省电力公司泗水县供电公司 | Multifunctional power transmission line deicing device |
| CN112271684A (en) * | 2020-11-28 | 2021-01-26 | 贵州电网有限责任公司 | Deicing device for high-voltage cable of power distribution network |
| CN115102122A (en) * | 2022-07-06 | 2022-09-23 | 国网河南省电力公司平顶山供电公司 | Deicing method for transmission line lead |
| CN115102122B (en) * | 2022-07-06 | 2023-05-30 | 国网河南省电力公司平顶山供电公司 | Deicing method for transmission line wire |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101527441A (en) | Deicer for overhead transmission lines | |
| CN201393040Y (en) | Device for removing ice on overhead transmission line | |
| CN204538627U (en) | A kind of transmission line deicer | |
| CN104917130B (en) | A kind of line walking deicing robot and its obstacle-detouring method | |
| CN108767794B (en) | Cable defroster in winter | |
| CN105207158A (en) | High-voltage electric wire deicing robot | |
| CN202009211U (en) | Rapid deicing device for four-bundle conductors | |
| CN101728803A (en) | Robot for de-icing of power transmission lines | |
| CN204992492U (en) | Automatic defroster of high -tension transmission cable | |
| CN102227076B (en) | Robot used for automatically deicing high tension transmission line | |
| CN110601119B (en) | Ice and snow removing device for high-voltage transmission line | |
| CN107234985B (en) | Automatic deicing device and deicing method for railway tunnel | |
| CN102270822B (en) | Robot for automatic deicing of transmission line | |
| CN102330421A (en) | Outdoor deicing vehicle | |
| CN110661225A (en) | Cable deicing device | |
| CN202004378U (en) | Traveling arm of walking robot for transmission line | |
| CN214976037U (en) | Cable-stay bridge tubular automatic intelligent deicing robot | |
| CN205670655U (en) | A kind of deicer for overhead transmission lines | |
| CN203603099U (en) | Obstacle avoiding device for snow remover | |
| CN106480850A (en) | Laser pavement deicer | |
| CN105826891A (en) | Wire deicing device | |
| CN202989723U (en) | Snow melting device | |
| CN103490345A (en) | Upper clamping obstacle crossing travelling mechanism for high-tension cable | |
| CN204858486U (en) | High -voltage line deicing robot driving device | |
| CN205565650U (en) | Cable deicing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20090909 |