Additional brake power failure time-delay operation device

Abstract

The invention discloses an additional brake power failure time-delay operation device which comprises a power source connected with a circuit, a work brake (9), an additional brake (8), a first safety return circuit switch (6), a second safety return circuit switch (7), a main controller (10), a first power source detecting relay (1) and a capacitance stored energy return circuit (11), wherein the first power source detecting relay (1) is used for detecting the power source. When the power source works normally, the capacitance stored energy return circuit (11) and the additional brake (8) are disconnected. When the power source is cut off, the capacitance stored energy return circuit (11) provides short-time energy for the additional brake (8) to achieve time-delay operation of the additional brake. The additional brake power failure time-delay operation device enables the additional brake to operate in a time delay mode relative to the work brake under the circumstance that an escalator and an automatic pavement do not require the additional brake to operate when power is cut off suddenly, requirements for the braking and stopping distance can be met, serious impact is not generated, the additional brake operates instantly, and safety is ensured. The time-delay operation device has the advantages of being high in charging speed and low in cost.

Description

technical field [0001] The invention relates to an additional brake control device for escalator and moving walk systems. Background technique [0002] The latest "Safety Regulations for the Manufacture and Installation of Escalators and Moving Walks" GB16899-2011 Article 5.4.2.2.2 stipulates that when the additional brake is activated, it is not necessary to ensure the braking distance required for the working brake (see 5.4.2.1.3) . Therefore, when designing the additional brake, in order to effectively stop the escalator or moving walk, the manufacturer rarely considers the requirement of the additional brake for the stopping distance of the escalator or moving walk. However, clause 5.4.2.2.5 stipulates: If the power supply fails or the safety circuit loses power, the additional brake and the working brake are allowed to act at the same time, and the stopping conditions should comply with the regulations on the stopping distance of escalators or moving walks. Otherwise,...

AI Technical Summary

Problems solved by technology

However, on the one hand, the cost of the UPS is relatively high in this method. On the other hand, it takes a long time to charge the UPS. If the escalator or moving walkway is out of service for a long time and the battery power of the UPS is discharged, it will be encountered soon after it is first put into operation. In case of power failure, the purpose of delayed action of the additional brake cannot be achieved

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