Valve open-close mechnaism of movable high-tension switch cabinet

Abstract

The invention relates to one kind of shutter mechanism of high voltage switchgear cabinet. Which includes: a pare of guiding posts on the both walls of the circuit breaker chamber, the upper and lower valves sliding assigned to the guiding posts for shielding the static contact devices extended to the circuit breaker chamber, and a pare of traction devices on the wall of the circuit breaker chamber connect with the two ends of the lower valves, the synchronous interaction devices on the guiding posts for the upper and lower valves. Its advantages show as follow: the synchronous interaction devices keep the upper and lower valves perfectly synchronized and ensure the valves moves reliably. The synchronous interaction devices will not occupy the room of the circuit breaker chamber.

Description

technical field [0001] The invention relates to a valve opening and closing mechanism of a removable high-voltage switchgear, which is arranged on the removable high-voltage switchgear and plays a role of shielding live static contacts, and belongs to the technical field of safety protection facilities for high-voltage switchgears. Background technique [0002] Removable high-voltage switchgear is widely used in power distribution and transformation in various industries and fields such as power plants, substations (stations), industrial and mining enterprises, railway transportation, high-rise buildings, etc. It is responsible for distributing electric energy and controlling circuits , protection, monitoring, etc. This kind of switchgear usually consists of four parts, namely: control room, circuit breaker room, busbar room, cable room, a set of static contact seats as static contact devices are fixed in the cavity of the circuit breaker room, a set of static contact The s...

AI Technical Summary

Problems solved by technology

However, when the connecting rod drives the valve, the gears are subjected to axial and radial forces at the same time, especially when the valve is closed, the axial force is likely to cause misalignment between the gears that mesh with each other, which affects the closing effect. The use of gear pairs to realize the interaction between the upper and lower valves has the disadvantage of poor reliability; the split valve mechanism is critical to the depth of the switchgear and the contact box, so although it has the advantages of strong pertinence, it has poor versatility. lack of

[0005] Also for example, Chinese patent CN2773954Y discloses a pulley transmission mechanism of a high-voltage switchgear valve. , The connection of the wire rope will bring trouble to the installation

[0006] For another example, Chinese patent CN2620404Y recommends a valve mechanism of a high-voltage switchgear, which aims to save the space occupied when the valve is opened, but because it adopts a rolling shutter door Therefore, when the curtain door is opened and wound on the roller, the occupied space is still relatively large, so it is still not enough to achieve a satisfactory space-saving effect; as we all know, the disadvantages of the roller shutter door are also manifested as It is often difficult for the side edges on both sides of the door to maintain a long-term sliding fit effect with the door rails set on the left and right chamber walls (the patent is called a metal partition) of the circuit breaker room. Once there is a slight deviation, it will appear The jamming phenomenon during the opening and closing process even damages the curtain door. Moreover, the shape of the door rail recommended by this patent is generally S-shaped, and the movement resistance is large, which will increase the chance of jamming, and the reliability of the curtain door operation cannot be guaranteed. ; The pair of return springs responsible for resetting the curtain door will inevitably be fatigued, and it will be difficult to show the initial effect after a period of use, especially when the forces between the pair of return springs are not consistent , it will affect the overall opening / closing effect of the contact box, so the return spring will also affect the reliability of the action of the curtain door, unless the return spring is frequently replaced; it is only for the opening and closing of the upper and lower contact box openings The use of large curtain doors from top to bottom is not conducive to saving materials

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