Thermally stable oil-immersed voltage transformer
A voltage transformer and oil-immersed technology, which is applied in the direction of inductors, transformers/inductor shells, transformers, etc., can solve the problems of thermal expansion and contraction of insulating oil, expansion or contraction, etc., and achieve the effect of increasing stability
Pending Publication Date: 2022-03-25
戴晓勇
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Problems solved by technology
[0003] There is an oil-immersed voltage transformer, most of which refer to capacitive voltage transformers. Capacitive voltage transformers are mainly composed of capacitive voltage dividers and medium-voltage transformers. The capacitive voltage dividers are composed of porcelain sleeves and several Composed of series capacitors, the ceramic sleeve is filled with insulating oil that maintains a positive pressure of 0.1MPa. In order to avoid the influence of thermal expansion and contraction of the insulating oil on the voltage transformer, a steel bellows will be installed on the top of the ceramic sleeve to balance the oil pressure in different environments. However, the expansion oil itself will still expand or contract under the influence of temperature, so further improvement is needed
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Embodiment 1
[0041] see Figure 1-7 , a thermally stable oil-immersed voltage transformer, including a ceramic sleeve 1, the top of the ceramic sleeve 1 is fixedly connected with a sealing plate 2, a through hole is opened between the upper and lower sides of the sealing plate 2, and the top surface of the sealing plate 2 is fixed Connected with a cap 3, the inner side of the cap 3 is provided with a bottom ring and a lifting ring 4, an expansion joint 5 is fixedly connected between the bottom ring and the lifting ring 4, and a plurality of evenly distributed limit rods are fixedly connected on the outer wall of the bottom ring , the side wall of the lifting ring 4 is fixedly connected with a plurality of blocks matching the limit rods, and the limit rods pass through the blocks and are slidably connected with them. Through the above settings, the stability of the lifting ring 4 when moving up and down is increased. , the bottom ring is fixedly connected to the top surface of the sealing p...
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The invention discloses a thermal stability type oil-immersed voltage transformer, and belongs to the technical field of voltage transformers. When the temperature of insulating oil in a ceramic sleeve rises, the temperature of temperature sensing liquid in a temperature sensing pipe rises, the volume of the temperature sensing liquid becomes large, an elastic sheet deforms to drive a valve rod to move leftwards, and at the moment, a sealing plate is separated from a sealing ring to enable a right-angle pipe to be conducted; meanwhile, the pressure in the ceramic sleeve and the expansion joint is increased, the volume of the insulating oil is increased, a lifting ring is jacked upwards at the moment, in the upward moving process of the lifting ring, a first piston is driven by a lifting rod to move upwards, the insulating oil in the expansion joint is pumped into a driving pipe at the moment, and the insulating oil is prevented from overflowing due to excessive expansion after being heated; and when the temperature of the insulating oil is reduced, the insulating oil in the driving pipe can be pushed into the transfer pipe, so that the elastic film expands to compensate the volume of the insulating oil, and the stability of the insulating oil in use is improved.
Description
technical field [0001] The invention relates to the technical field of voltage transformers, in particular to a thermally stable oil-immersed voltage transformer. Background technique [0002] A voltage transformer is similar to a transformer and is an instrument used to transform voltage. However, the purpose of transforming the voltage of the transformer is to facilitate the transmission of electric energy, so the capacity is very large, generally calculated in kilovolt-ampere or megavolt-ampere, and the purpose of voltage transformer transforming voltage is mainly used for measuring instruments and relays. The protection device supplies power to measure the voltage, power and energy of the line, or to protect valuable equipment, motors and transformers in the line when the line fails. [0003] There is an oil-immersed voltage transformer, most of which refer to capacitive voltage transformers. Capacitive voltage transformers are mainly composed of capacitive voltage divi...
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IPC IPC(8): H01F27/02H01F27/32H01F27/40H01F38/26
CPCH01F27/321H01F27/402H01F27/022H01F38/26H01F2027/406H01F2027/404
Inventor 戴晓勇
Owner 戴晓勇