The gap of elevator horizontal sliding door is an important safety index of elevator. When the horizontal sliding door is applied on the most unfavorable point with an external force of 150N in the opening direction, the door gap shall not exceed 30mm. However, the manual measurement has the defect about low efficiency and accuracy. This article designs an instrument for measuring the gap of elevator door leaf in force exertion state. The instrument contains support plates, oil cylinders, scale, drive arm, handle, plunger pumps, ejector rod, positioning hole and spring. While using, the inspector inserts the instrument into the gap of the horizontal sliding door and swings the driving arm. When the second support plate is not aligned with the scale and the ejector rod slides out of the positioning hole, it indicates that the external force of 150N makes the door gap less than 30mm. The operation of the instrument is Optimized, so that single inspector can easily complete the measurement and identify the results directly. The instrument is also convenient to reset after measurement and easy to carry. The instrument has the feature of high accuracy, simple operation and well portability. The horizontal sliding door also can be avoid damaging during the measurement process.
As an important part of the elevator structure, wire rope carries all loads so that it may be broken due to broken wire, wear and tear, corrosion and so on. The traditional elevator wire rope detection method is inefficient and may cause danger to the inspector. The inspectors observe the defect of the wire rope with eyes and measure the diameter of the wire rope with vernier caliper. In this article, an elevator wire rope defect image analysis software is designed. It can measure without any modification to the elevator brake. so as to avoid the impact of the modification on the performance of the elevator brake. This method is suitable for long-term on-site monitoring and can be used as one of the detection technologies of elevator monitoring system. The software has three main functions: picture browsing and reading function, image processing function and historical data query function. Through processing the image and outputting the treatment results of the wire rope, the software provides professional reference of the elevator safety for the inspector. By comparing the change of wire rope defeat, the inspector can judge whether the wire rope of the elevator still meets the requirements.
As an essential safety device of elevator, speed governor and safety gear system will quickly stop the car when the elevator occurs overspeed or other accidents. According to the shooting video of elevator speed governor trigger process, the software analyzes the video by frame and gets the action of governor. The software can display gray level detection result display and draw the speed curve. Through using this software, the verification efficiency and accuracy of the elevator speed governor inspection can be significantly improved.
As an indispensable tool for people to travel, elevator plays an important role in our daily life. Through investigation and data analysis, this paper deeply studies the faults of elevators in use in Shanghai in recent three years. This paper analyses the fault systems and fault types of different types of elevators, further studies the causes of faults, and puts forward some suggestions on how to reduce the number of elevator faults and improve elevator safety.
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