Locking device for switch cabinet transfer trolley

Abstract

The invention provides a locking device for a switch cabinet transfer trolley. The locking device comprises a supporting platform serving as a mounting foundation, two positioning pins fixedly arranged on two sides of the rear end of the supporting platform, two limiting fixed columns fixedly arranged on the front side of the upper end surface of the supporting platform, and a butt-joint locking operation rod which is fixedly arranged on the supporting platform and is used for locking the switch cabinet transfer trolley and the switch cabinet in a butt-joint manner through rotation during use.The locking device is structurally characterized by further comprising a tight attachment identification assembly and a self-locking assembly, wherein the tight attachment identification assembly isfixedly arranged on the supporting platform and used for judging whether the switch cabinet transfer trolley is tightly attached to the switch cabinet or not during use, and the self-locking assemblyis used for locking the butt-joint locking operation rod when the switch cabinet transfer trolley is not tightly attached to the switch cabinet during use. Through the structural design, the switch cabinet transfer trolley can be effectively ensured to be tightly locked and butted with the switch cabinet in use, and a high-voltage handcart circuit breaker can be effectively prevented from slidingoff from the rear part of a supporting platform of the transfer trolley in the transfer process.

Description

technical field [0001] The invention relates to an auxiliary tool for a substation switch cabinet maintenance device, in particular to a locking device for a switch cabinet transfer trolley. Background technique [0002] The switchgear transfer trolley is an important auxiliary tool for pulling the high-voltage handcart circuit breaker of the substation out of the armored cabinet and transferring it to a suitable place for electrical testing and maintenance. The existing substation high-voltage switch transfer trolley is mainly composed of a car body, four rollers located at the four corners below the car body, a support platform located above the car body, and a wheel set between the car body and the support platform to adjust the height of the support platform. The height adjustment device, and the locking device on the support platform for docking with the switch cabinet and fixing the high-voltage handcart circuit breaker during the transfer process, among which the lock...

AI Technical Summary

Problems solved by technology

[0003] The locking device of the existing switchgear transfer trolley has the following problems in use: First, whether the docking and locking operation lever reliably locks the transfer trolley and the switchgear and docks, completely depends on the experience and judgment of the operator, and due to negligence, etc. The reason is that it is easy for the transfer trolley to perform a locking operation when it is not close to the switch cabinet, resulting in the triangular lock tongue that is docked with the locking operating lever not actually locking the transfer trolley and the switch cabinet; second, it is prone to occur during the operation The triangular lock tongue at the rear end is decoupled from the switchgear due to accidentally touching the operating handle at the front end of the docking locking operating lever. The above two situations will cause the transfer trolley and the switchgear to be unable to be effectively locked. In the process of pulling the high-voltage handcart circuit breaker from the switchgear to the transfer trolley when the trolley and the switchgear are not effectively locked, the high-voltage handcart circuit breaker may fall to the ground, which is harmful to the personal safety belt of the equipment and operators. to threaten

Third, after the high-voltage handcart circuit breaker is placed on the transfer trolley, during the movement of the transfer trolley, only two points at the front end of the high-voltage handcart circuit breaker are fixed, and the rear end of the high-voltage handcart circuit breaker has no fixing or limiting mechanism. If the tightening device falls off during the transfer process due to improper operation, there is a risk that the high-voltage handcart circuit breaker will slip from the support platform of the transfer trolley

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