Speed measuring device based on twin elevator, twin elevator and monitoring method for twin elevator

Abstract

The invention discloses a speed measuring device based on a twin elevator, the twin elevator and a monitoring method for the twin elevator. The twin elevator comprises two lift cars which are arrangedup and down in the vertical direction and run in the same shaft, the speed measuring device comprises a plurality of inertia wheels, a traction part and a plurality of sensors; each lift car is provided with the corresponding one or more inertia wheels; the traction part is arranged between the top and the bottom of the shaft in a tensioned state around the inertia wheels, and when the lift carsrun up and down in the shaft, the inertia wheels rotate under the action of the traction part; and the corresponding position of each lift car is provided with the corresponding one or more sensors, and each sensor obtains the speed and / or position of the lift car where the sensor is located by detecting rotation of the inertia wheels on the lift car. By using the device, the speed and position ofthe lift cars can be measured and calculated more accurately, so that the lift cars always run within an allowable safe distance, safe operation of the elevator is guaranteed, and the transportationefficiency is also improved.

Description

technical field [0001] The present application relates to the technical field of elevators, in particular to a speed measuring device based on twin elevators, twin elevators and a monitoring method for twin elevators. Background technique [0002] A twin elevator refers to an elevator system in which two cars are installed in the same shaft, and the two cars can run independently up and down in the same shaft. In order to ensure that the two cars can run safely in the hoistway without collision, the minimum allowable safe running distance between the two cars is usually dynamically set. When the relative running speed of the two cars is lower, the allowed minimum safe distance The distance is smaller. At the same time, the system will track and judge in real time. Once the safety distance between the two cars is less than the minimum allowable safe running distance under the set relative speed of the cars, the elevator will immediately implement the safety protection mode t...

AI Technical Summary

Problems solved by technology

In the prior art, it can be obtained by using a magnetic scale, but the cost is relatively high; the speed and position of the car can be obtained by installing a sensor on the speed limiter or its accessories, but this method is not suitable for the application of electronic safety gear Twin elevators; sensors can also be installed on the anti-rope pulley of the car or at the guide roller, but the anti-rope pulley is connected to the traction machine through a suspension rope, which has a large load-bearing force, and there is a risk of stagnation, slipping or even breaking. It may be separated from the guide rail of the car with the shaking of the car, which will cause a large error in the data measured by the sensor and affect the accuracy of the measurement; it is also possible to use two-dimensional codes in the hoistway, laser distance measurement, etc., but these methods The reliability and precision are not high, and the practical application operability is not strong

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