Electrical connection mode
According to the object and mode of connection, electrical connection can be divided into the following categories:
Welded joint
Welding connection is a way that two metal parts are melted by heating and cooled to form a whole connection. The advantages of welding connection are high connection strength, good conductivity and not easy to loosen, which is suitable for connection in harsh environments such as high temperature, high pressure and high frequency. The disadvantages of welding connection are that it requires professional skills and equipment, it is difficult to disassemble after connection, and it requires high surface quality of parts.
threaded connection
Threaded connection is a way to connect two or more parts closely through the cooperation of threaded pairs. The advantages of threaded connection are reliable connection and convenient disassembly, which is suitable for occasions that need frequent disassembly. The disadvantage of threaded connection is that the connection strength depends on the quality and fastening force of thread, which is suitable for low temperature, low pressure and low frequency connection.
Plug connection
Plug-in connection is a way to connect plugs and sockets together and realize electrical connection through contact electrodes. The advantages of plug-in connection are convenient and quick connection, easy disassembly and replacement, and suitable for frequent insertion. The disadvantage of plug connection is that the connection is not firm enough and easy to loosen, which is suitable for low power and low voltage.
crimp connection
Crimping is a way to connect wires and terminals closely by mechanical pressure. The advantages of crimping are convenient connection and stable connection quality, and it is suitable for high power, high voltage and high frequency. The disadvantages of crimping are that it requires professional skills and equipment, it is difficult to disassemble after connection, and it requires high surface quality of wires.
Application field of electrical connection
Electrical connections are widely used in various fields. The following are several typical application scenarios:
home appliances
Common electrical connection methods in household appliances are plug connection and pressure connection. Such as TV sets, refrigerators, washing machines and other household appliances. The connection mode between the power cord and the inside of the electrical appliance is mostly plug connection, while the connection mode of the internal circuit board is mostly pressure connection.
Industrial production device
The common electrical connection methods in industrial production equipment are welding connection and threaded connection. Such as machine tools, punching machines, injection molding machines, etc. The connection mode between various components is mostly screw connection, while the connection mode between circuit board and cable is mostly welding.
Transport and communication facilities
The common electrical connection methods in transportation equipment are plug connection and pressure connection. For example, cars, trains, airplanes and other means of transportation, the connection mode between their components is mostly plug-in, while the connection mode between circuit boards and cables is mostly compression.
Communication equipment
Common electrical connection methods in communication equipment include plug connection and pressure connection. For example, mobile phones, computers, routers and other communication equipment, the connection mode between various components is mostly plugging, while the connection mode of internal circuit boards is mostly crimping.
Technical development of electrical connection
With the development of science and technology and the intelligentization of electrical equipment, the electrical connection technology is constantly innovating and developing. The following are the development trends of several electrical connection technologies:
Wireless electrical connection
Wireless electrical connection refers to the connection between electrical devices through wireless transmission technology, which is convenient, fast and flexible without physical contact. Bluetooth, Wi-Fi and other wireless connection technologies have been widely used in mobile phones, computers, smart homes and other fields.
Intelligent electrical connection
Intelligent electrical connection refers to the connection and control between electrical devices through intelligent devices such as sensors and controllers, which can realize remote monitoring, remote control and automatic control. For example, smart home, smart factory and other application scenarios, intelligent electrical connection has become a trend.
Reliable electrical connection
Reliable electrical connection refers to improving the quality and reliability of electrical connection and reducing connection failures and potential safety hazards through new materials, new processes and other technical means. For example, the reliability of key connecting parts such as cable terminal connection and electrical contactor has become an important consideration in the design and manufacture of electrical equipment.
Safety measures for electrical connection
The safety of electrical connection is an important factor to ensure the normal operation of electrical equipment and personal safety. The following are several safety measures for electrical connection:
ground protection
Grounding protection refers to connecting the metal shell or conductor of electrical equipment with the ground, so as to introduce the fault current of electrical equipment into the ground to protect personal safety and the normal operation of electrical equipment. For example, household appliances, industrial production equipment and other electrical equipment need grounding protection.
insulation protection
Insulation protection refers to the use of insulating materials or insulation layers in electrical equipment and electrical connections to isolate electrical equipment and electrical connections from the outside world and protect personal safety and the normal operation of electrical equipment. Such as wires and cables, circuit boards inside electrical equipment, etc. Need insulation protection.
overpower protection
Overload protection refers to the use of overload protectors, fuses and other protective devices in electrical equipment and electrical connections to prevent electrical equipment and electrical connections from being damaged or causing fires and other accidents due to overload. Such as household appliances and industrial production equipment.