A spring energy storage type hydraulic operating mechanism for a circuit breaker
A technology of hydraulic operation and circuit breaker, which is applied to the protection switch operation/release mechanism, the power device inside the switch, etc. It can solve the problem of unstable pressure relief operation, achieve long service life, low failure rate, avoid hydraulic oil The effect of pressure fluctuations
Active Publication Date: 2019-01-01
HENAN PINGGAO ELECTRIC +2
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Problems solved by technology
[0006] The invention provides a spring energy storage type hydraulic operating mechanism for a circuit breaker to solve the technical problem in the prior art that the pressure relief operation is unstable due to the pressure relief spring inside the safety pressure relief valve itself.
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[0033] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0034] The specific embodiment of the spring energy storage type hydraulic operating mechanism for the circuit breaker provided by the present invention is as follows: Figure 1 to Figure 7 As shown, the operating mechanism in this embodiment includes a working cylinder 15 extending in the vertical direction, the upper part of the working cylinder 15 is a tetrahedral structure, and the lower part is a cylindrical structure. Two energy storage cylinders, an oil pump motor 17 and a control valve 22 are installed correspondingly at the tetrahedron structure of the working cylinder.
[0035] The structure of the working cylinder 15 is the same as that of the working cylinder in the spring energy storage type hydraulic operating mechanism in the prior art, and both include a cylinder block, and a differential piston 16 is moved in the cylinder block, and the ...
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The invention provides a spring energy storage type hydraulic operating mechanism for a circuit breaker. The hydraulic operating mechanism comprises a working cylinder and a spring energy storage device, wherein the spring energy storage device is used with the working cylinder in a matching way and comprises an energy storage high-pressure cavity, an energy storage piston and an energy storage spring, the energy storage piston is corresponding to the energy storage high-pressure cavity, the energy storage spring is in transmission connection with the energy storage piston, the operating mechanism also comprises a safety relief valve, the safety relief valve is used for relieving the energy storage high-voltage cavity, the safety relief valve is controlled to be opened by the energy storage spring, the safety relief valve is controlled to be opened by an intermediate transmission mechanism when the energy storage spring is pressed and deformed to a set position or the safety relief valve is controlled to be opened by outputting a control signal to a control unit when the energy storage spring is pressed and deformed to the set position. The pressure in the energy storage high-voltage cavity is shown to reach a set load when the energy storage spring is compressed and deformed to the set position, the relief valve is controlled to be opened directly by a compression and deformation position of the energy storage spring, the influence of pressure fluctuation of hydraulic oil is effectively prevented, and the stability and the reliability of the safety relief valve are improved.
Description
technical field [0001] The invention relates to a spring energy storage type hydraulic operating mechanism for a circuit breaker. Background technique [0002] The operating mechanism is an important part of the high-voltage circuit breaker, which is used to drive the circuit breaker for opening and closing operations. According to different driving forces, the operating mechanism can be divided into electromagnetic operating mechanism, pneumatic operating mechanism, energy storage hydraulic operating mechanism, etc. Among them, the spring energy storage type hydraulic operating mechanism is widely used because of its high output power, fast response and high reliability. [0003] The existing spring energy storage type hydraulic operating mechanism can be divided into two types according to the assembly method of the energy storage cylinder and the working cylinder, one is that the energy storage piston in the energy storage cylinder is an annular energy storage piston, an...
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IPC IPC(8): H01H71/10H01H3/24
CPCH01H3/24H01H71/10
Inventor 李海文庞庆平王永良王亚辉张全民雷琴刘煜汪陆胡月萍
Owner HENAN PINGGAO ELECTRIC