Novel self-resetting circuit safety device and working method based on sma thermoelastic material

Abstract

The invention discloses a novel self-recovery circuit safety device and working method based on SMA thermoelastic material. The device includes a current supply circuit, an alarm circuit and a self-recovery circuit safety switch, wherein the safety switch is made of Ti54Ni34Cu12 shape memory alloy wire, fastened Screws, slides, pre-tightening springs, current supply circuit conversion contacts, alarm circuit conversion contacts, insulating guide rails, metal fixing clips, trunk wires and contact conversion guide rails; the present invention utilizes Ti54Ni34Cu12 alloy with TW‑SME The phase transition under the low temperature and high temperature state realizes the timely switching between the current supply circuit and the alarm circuit; the advantages of the present invention are self-recovery overcurrent protection, short response time, instant alarm, easy installation, safety switch It can still protect the circuit after failure, and has lower requirements on the working environment; the invention is suitable for various large, medium and small industrial and civil building systems.

Description

Technical field [0001] The invention belongs to the technical field of circuit safety, and specifically relates to a novel self-resetting circuit safety device and a working method based on SMA thermoelastic material. Background technique [0002] In recent years, more and more new circuit design concepts have been widely used in industrial and civil building systems. The purpose is to improve the convenience, reliability and safety of people’s lives. The first task is to improve the safety of circuit use. . The general method is to add a fuse to the circuit. When the circuit is abnormal or malfunctions, it can play the role of over-current protection to prevent electrical appliances from burning and fire. The traditional fuse manufacturing materials have transitioned from the original lead-antimony alloy to lead, zinc, aluminum and other low-melting metals according to the allowable current intensity to make fuses with different diameters. The fuse made of these materials can ...

AI Technical Summary

Problems solved by technology

The self-resetting fuse made of this polymer PTC polymer can not only play the role of overcurrent protection, but also can automatically reset, which solves some shortcomings of traditional fuses. It takes a certain amount of time for the separation of the device, which makes the response time of the overall device slower and cannot achieve the effect of fast closure, and the system lacks the necessary alarm device so that the circuit fault cannot be reflected, which hinders the timely recovery of the circuit

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