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Remaining hydraulic spring mechanism

A hydraulic spring and redundancy technology, applied in the protection switch operation/release mechanism, high-voltage air circuit breaker, high-voltage/high-current switch, etc., can solve the problem that the circuit breaker cannot be normally opened and closed, and achieves a simple structure and improved reliability. The effect of stability and ease of processing

Active Publication Date: 2009-06-03
CHINA ELECTRIC POWER RES INST +1
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AI Technical Summary

Problems solved by technology

[0003] In order to overcome the failure of the circuit breaker to open and close normally due to oil leakage and other reasons in the hydraulic spring mechanism of the existing high-voltage circuit breaker, the present invention proposes a redundant hydraulic spring mechanism, which connects two hydraulic cylinders in series and pushes the same piston at the same time sports

Method used

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  • Remaining hydraulic spring mechanism

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Embodiment Construction

[0015] exist figure 2 Among them, the hydraulic pump 12 pressurizes the oil to the high-pressure oil storage tank 4, and its energy storage piston 13 is connected with the belleville spring cylinder 2. A one-way valve is installed between the hydraulic pump and the high-pressure oil storage tank to prevent pressure drop when the pump is stopped.

[0016] 1. Closing

[0017] The side of the single-outlet rod cavity corresponding to the working piston 5 is normally charged with pressure. Once the closing solenoid valve 9a is actuated, the switch valve 10 is actuated, the side of the non-rod chamber of the single-outlet rod cavity corresponding to the working piston 5 and the lower side of the corresponding double-outlet rod part communicate with the high-pressure oil storage tank, relying on the principle of pressure difference to move the piston Push to the closed position. Since the piston rod is double-redundant, even if there is a problem with one cylinder (such as leaka...

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Abstract

The invention provides a remaining hydraulic spring mechanism used for an operating mechanism of a high-voltage circuit breaker. A hydraulic actuator adopts two hydraulic cylinders connected with in series, thus increasing the remaining of the hydraulic actuator while reducing the changes of other machines and hydraulic elements to the utmost extent, so that not only the reliability of the hydraulic actuator is improved, but also the piston action area is increased, thus expanding the scope of opening and closing speed of a breaker under normal running conditions.

Description

technical field [0001] The invention belongs to the field of high-voltage circuit breakers, in particular to a hydraulic spring operating mechanism for high-voltage circuit breakers. Background technique [0002] As the main protection and control element of substation, high-voltage circuit breaker has extremely important operation reliability. Therefore, high reliability requirements are put forward for the operating mechanism of the high voltage circuit breaker. The hydraulic spring mechanism combines the advantages of metal spring mechanical energy storage with the advantages of liquid force transmission and energy conversion, and is widely used in SF 6 breaker. However, the current hydraulic part of the circuit breaker adopts a non-redundant design for the execution hydraulic cylinder. When the piston of the hydraulic cylinder slows down the opening and closing speed of the circuit breaker due to oil leakage or other reasons, or refuses to open or close, it will inevit...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/34H01H71/10
Inventor 袁大陆和彦淼李成功宋杲
Owner CHINA ELECTRIC POWER RES INST