Bell-type transformer lifting method and lifting device
A technology of transformers and power transformers, applied in the direction of switchgear, electrical components, etc., can solve problems affecting the reliability of transformer operation, threats to the cleanliness of transformer cores and coils, and reduce the use of special vehicles. The method and device are reasonable and effective. The effect of reducing exposure time
Active Publication Date: 2016-08-24
STATE GRID SHANDONG ELECTRIC POWER +1
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Problems solved by technology
Areas with high air dust content pose a threat to the cleanliness of transformer cores and coils exposed for a long time, affecting the operational reliability of transformers
Method used
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[0019] First, drain oil on the power transformer, then open the manhole to ventilate the inside of the transformer. After meeting the working conditions, the staff enters the inside of the transformer through the manhole, removes the leads and the top cover of the on-load tap changer, feeds the special protective sleeve for flange separation through the manhole, inserts the switch body as a whole from the bottom, and the protective sleeve The caliber protrudes from the flange opening on the top of the transformer box. Then the staff use a single-feed cutting saw to separate the mounting flange of the bell-type OLTC, and then hoist it out as a whole by a crane. Then install the new box top type with the voltage regulating switch. After the installation work is completed, carry out vacuum oil filling, air release and other work on the transformer. After passing the high-voltage test, the transformer resumes operation.
[0020] Application effect:
[0021] Through the replace...
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The invention relates to a method and a device for lifting an immersion bell transformer, and belongs to the field of electricity construction. The method provided by the invention for lifting the immersion bell transformer is performed according to the following steps of: 1, discharging oil of a power transformer; 2, opening a manhole and ventilating the transformer; 3, disassembling a lead and a top cover of an on-load tap changer of the transformer; 4, covering the on-load tap changer of the transformer by using a protecting cover, wherein the aperture of the protecting cover stretches out from a top flange port of a transformer box; 5, separating a mounting flange of the on-load tap changer of the immersion bell type transformer; and 6, lifting out the on-load tap changer of the immersion bell type transfer via the protecting cover and then exchanging a roof type transformer on-load tap changer. The lifting device comprises a transformer; two sides of the top end of an oil tank of the on-load tap changer of the transformer are provided with mounting flanges; and a gap is reserved between the mounting flanges and the top part of a transformer shell. With the adoption of the method and the device, the disadvantages in the prior art are overcome, the construction period of exchanging the on-load tap changer is shortened and the exchanging efficiency is improved.
Description
technical field [0001] The invention relates to a bell-type transformer lifting method and a lifting device, which belong to the field of electric power construction. Background technique [0002] With the rapid development of the power grid, higher requirements are placed on the operational reliability of transformers. Transformers that have been in operation for more than 15 years in substations have more than 20,000 times of voltage adjustment by their on-load tap changer switches. Due to reasons such as burning of dynamic and static contacts and wear of mechanical parts, the defect rate has increased year by year, affecting the safe and reliable operation of transformers. Coupled with the manufacturing process of some domestic OLTCs, the quality of parts and components cannot reach their design life. This will seriously affect the reliable operation of the transformer. The replacement of the on-load voltage regulation technology currently implemented is carried out dur...
Claims
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IPC IPC(8): H02B3/00
Inventor 王强陈勇强孙学锋高鹏孙胜涛王世儒王卫东耿垒
Owner STATE GRID SHANDONG ELECTRIC POWER