A Multifunctional Arcless Switch and the Measures for Realizing Arcless Closing and Breaking

Abstract

The invention discloses a multifunctional arc-free switch and a measure for achieving arc-free closing and opening, belongs to industrial electric control devices, and particularly relates to a circuit control switch and a method for achieving functions of the switch. Through novel line structure composition, arc-free closing and opening of the switch are achieved when the switch runs, arc discharge is prevented from being generated, and dangers caused by arc discharge is avoided. The multifunctional arc-free switch is formed by a main contact, an integrated control unit, an auxiliary contact and a coil. When the coil is powered on, the integrated control unit is connected firstly, currents of a main circuit pass through the integrated control unit, at the moment, no current passes through the main contact, then the main contact is closed in an arc-free mode, the main contact supplies electricity to a load, the integrated control unit is disconnected automatically, and arc-free closing of the switch is achieved. After the switch stops running, the coil is powered off, the integrated control unit is connected while the main contact starts to be opened, no current passes through the main contact, the main contact is opened immediately, then the integrated control unit is disconnected, no current passes through the main contact when the main contact is opened, and therefore arc-free opening of the switch is achieved. The multifunctional arc-free switch and the measure for achieving arc-free closing and opening are used for control circuits of a circuit system.

Description

technical field [0001] The invention relates to an industrial electrical control device, in particular to a switch of a control circuit and a method for realizing its function. Background technique [0002] Switches are commonly used control components in industrial electrical control and are widely used in various control circuits. In the actual application process, arcing phenomenon will occur when the switch is closed or disconnected, which will cause great harm. It is manifested in: (1) the existence of the arc prolongs the time for the switch to close and open when the circuit fails, and aggravates the harm of the short-circuit fault of the circuit system; (2) the high temperature generated by the arc will melt and vaporize the contact surface, Burn out the insulating material and seriously affect the load capacity; (3) Because the arc can move under the action of electric power and heat, it is easy to cause arcing short circuit and injury, and bring various safety haz...

AI Technical Summary

Problems solved by technology

In the actual application process, arcing phenomenon will occur when the switch is closed or disconnected, which will cause great harm

It is manifested in: (1) the existence of the arc prolongs the time for the switch to close and open when the circuit fails, and aggravates the harm of the short-circuit fault of the circuit system; (2) the high temperature generated by the arc will melt and vaporize the contact surface, Burn out the insulating material and seriously affect the load capacity; (3) Because the arc can move under the action of electric power and heat, it is easy to cause arcing short circuit and injury, and bring various safety hazards to the electric circuit, such as fire and explosion Waiting for an accident

The arc extinguishing measures taken by the existing switches are to make corresponding arc extinguishing devices according to different characteristics of the arc extinguishing medium and arc extinguishing materials. The disadvantage of this type of device is that the structure is complex, the material performance requirements for the arc extinguishing part are high, and the manufacturing cost is high. , and the arc extinguishing effect is not ideal

In addition, the existing switches have no explosion-proof function, and the explosion-proof switches used are all special switches, which have complex structures, large volumes, and inconvenient applications.

Another disadvantage of the existing switch is that it only has the function of closing and breaking, and has no fault breaking function. Therefore, in the circuit system where the switch is installed, a circuit breaker must be installed, which not only increases the cost, but also reduces the safety of the entire circuit system. and reduced reliability

[0003] Chinese patent application "Multifunctional switch based on intelligent contact AC single-phase switch", the publication number is CN102157912. Including: a microcontroller, three-phase voltage of a three-phase power system, several one-way switches and objects controlled by it, etc. This is a control system composed of multiple components and cannot be used as a single switching element

[0004] In summary, the existing switches have complex principles for realizing their functions, use many electronic components, and are theoretically feasible, but there are many defects, and it is very difficult to convert them into switch products, so they cannot meet the needs of modern industrial production. technology to fill this gap

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