Probe case protection valve mechanism

Abstract

The invention provides a probe case protection valve mechanism. Two valves (3) capable of sliding along two rails are respectively arranged in each rail (2) of the probe case protection valve mechanism, the two valves (3) in each rail (2) are respectively connected with one upper valve connecting lever (4) and one lower valve connecting lever (5), each lower valve connecting lever (5) is connected with one pushing valve connecting lever (6), two upper valve connecting levers (4) are connected with two lower valve connecting levers (5), and the other ends of two pushing valve connecting levers (6) are movably connected with a handcart chamber base plate. A breaker handcart (1) is provided with a valve drive part (7), and when the breaker handcart (1) moves to the handcart chamber direction, the valve drive part (7) is arranged to be a structure capable of pressing the two pushing valve connecting levers (6) to move downwards. The probe case protection valve mechanism can ensure that valves of a probe case protection mechanism can be opened and closed reliably.

Description

technical field [0001] The invention belongs to the technical field of metal armored removable switchgear, and more specifically relates to a protective valve mechanism of a contact box of a switchgear. Background technique [0002] Due to the relatively high voltage level of AC metal armored removable switchgear, the requirements for insulating materials and insulation distance are correspondingly high. The volume and weight of the electrical components used in the equipment are very large and heavy, which affects the safety of the equipment. Operation brings great difficulty. In order to ensure the safe and reliable operation of the equipment, there are more and higher requirements for the design and manufacture of AC metal armored removable switchgear, such as when the circuit breaker handcart is moved from the test position to the working position, the contact box protection The valve of the mechanism can be opened stably and reliably; when it is moved from the working ...

AI Technical Summary

Problems solved by technology

When adopting the above transmission design scheme and guiding design scheme, the resistance to push the protective valve is very large and the torque on the left and right sides is not easy to balance, which will cause instability during the movement of the circuit breaker handcart, especially the isolation handcart and voltage transformer handcart. In addition, the stable movement design of the circuit breaker handcart is mostly adopted when the circuit breaker handcart is moved to 80~100mm from the working position, and the positioning pin on the partition plate of the handcart is docked with the positioning hole on the circuit breaker handcart to ensure the circuit breaker. smooth movement and positioning of the

The above design schemes are very likely to cause the failure of cooperation with the protective valve of the contact box during the movement of the circuit breaker handcart, so that the reliable operation of the equipment cannot be carried out.

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