Elevator safety system and safety control method

Abstract

The invention provides an elevator safety system and a safety control method. The elevator safety system comprises an elevator controller, a driving controller, a brake, multiple first safety switchesarranged on a car, multiple second safety switches arranged on a machine room, a car ceiling electronic safety plate, a machine room electronic safety plate and a safety loop; the car ceiling electronic safety plate is mounted on a car ceiling of the car; the machine room electronic safety plate is mounted on the machine room; and the safety loop is formed by serially connecting a power supply, the driving controller and the brake. The car ceiling electronic safety plate is used for receiving state signals of the first safety switch and outputting the state signals to the machine room electronic safety plate. The machine room electronic safety plate is used for receiving state signals of the second safety switch and cutting off the safety loop when the first safety switch or the second safety switch is abnormal. The elevator safety system can perform the separation independent detection on the safety switches arranged on the machine room and the car to facilitate reduction of reciprocating bridging of cables and accurate positioning of the failure positions.

Description

technical field [0001] The invention relates to the technical field of elevator control, in particular to an elevator safety system and a safety control method. Background technique [0002] With the development of cities, high-rise buildings are rising frequently, and the use of elevators is becoming more and more popular. Then there are more and more safety accidents caused by elevator equipment failure, so the functional safety of elevators has gradually been paid attention to. [0003] At present, the safety system of the elevator uses an electrical safety chain to realize safety control. The safety chain is a safety circuit formed by connecting a safety switch and a relay in series. If any safety switch is activated, the safety chain will be disconnected, thereby prohibiting Operation of drives and brakes (brakes remain locked). [0004] The safety switches in the above-mentioned safety chain are distributed in various positions of the elevator, some are in the machin...

AI Technical Summary

Problems solved by technology

Therefore, the safety chain needs to be crossed back and forth, which makes the cable distribution span large and increases the cable cost. In addition, in order to reduce the voltage loss along the safety chain, a higher voltage circuit needs to be used, and the circuit design cost is correspondingly higher.

[0005] In addition, during elevator maintenance and inspection, in order to test and troubleshoot faults, some safety devices need to be artificially short-circuited. Since these safety devices are spread throughout the hoistway and car, the testing process is time-consuming and laborious, and it is not easy to detect and locate the fault location of the safety circuit.

Images