A deicing method based on transmission line pulley rolling and scraping
A technology of transmission lines and pulleys, applied in the direction of overhead lines/cable equipment, etc., can solve the problems of tower collapse, unbalanced force of towers, negative effects of sequential de-icing, etc.
Active Publication Date: 2016-03-30
STATE GRID CORP OF CHINA +2
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Problems solved by technology
When the icing is serious, the unbalanced force on both sides of the tower will exceed its design strength, resulting in tower failure
When using the pulley rolling and shoveling method for sequential deicing, even if the transmission line is not seriously icing, there may be an unbalanced force on the tower that exceeds its design strength, which will lead to negative effects of sequential deicing
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[0044] A non-limiting embodiment is given below in conjunction with the drawings to further illustrate the invention.
[0045] In the project, the pulley scraping method is currently the only feasible mechanical deicing method. The movable device on the line is remotely operated by the ground personnel, and the steel blade on the device is used to scrape the line icing, but because the pulley scraping method is used to remove the ice. When icing, the lines of each gear cannot be deiced at the same time, and there will be a large unbalanced tension difference between each gear of the continuous gear. When the unbalanced tension difference is too large to reach the design limit of the tower, the tower will collapse and twist , Not only can not effectively de-icing, but also cause secondary accidents. Therefore, the inventor proposed a corresponding deicing method in view of the feature that each gear line of the pulley scraping method can only be deiced once.
[0046] The deicing me...
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The invention discloses a deicing method based on an electric transmission line cable deicing robot. During deicing, the deicing robot moves on an electric transmission line cable so as to remove ice. The deicing method comprises the following steps of calculating the horizontal tension of each grade of cable on the electric transmission line so as to obtain the horizontal tension value of each grade during icing; comparing the horizontal tension values of all the grades so as to determine the grade with the maximum horizontal tension value, manually pulling a pulley to the cable at the grade with the maximum horizontal tension value, and stressing the pulley so as to enable a blade on the pulley to clear away the ice on the grade with the maximum tension value; determining the grade with the maximum tension value among the rest of grades by adopting a bubbling method, manually pulling the pulley to the cable at the grade with the maximum horizontal tension value among the rest of grades, stressing the pulley so as to clear way the ice on the grade with the maximum tension value till the ice on each grade of cable is completely removed. The deicing method is safe and can be used for reducing the unbalance tensile force of towers in a deicing process.
Description
Technical field [0001] The invention relates to a deicing method, in particular to a deicing method suitable for rolling and shoveling of transmission line pulleys. Background technique [0002] Ice and snow on transmission lines often cause accidents such as line tripping, disconnection, pole inversion, and flashover of insulators. In 2008, extreme ice and snow disasters occurred in southern my country, which caused the outage of more than 36,000 transmission lines of 10kV and above and more than 2,000 substations of 35kV and above, causing great losses to my country's power grid and national economy. [0003] Since the 1950s, countries around the world have continued to conduct research on icing of transmission lines, exploring the mechanism of icing, conditions for icing, and methods of preventing icing disasters. The current deicing methods are mainly divided into thermal deicing methods and mechanical deicing methods. Compared with thermal deicing methods, mechanical deicing ...
Claims
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IPC IPC(8): H02G1/02
Inventor 刘昌盛刘俊刘和志刘钊魏徐谢云云张莲花殷明慧
Owner STATE GRID CORP OF CHINA