Classification and structure principle of relay of liquid packing machine

1. Classification and structure principle of relay of liquid packaging machine; Use of relays

Classification and structure principle of relay of liquid packing machine; Vacuum packaging machine relay is a kind of automatic and remote control electrical appliances, widely used in automatic control system and remote control, telemetry system, power protection system and communication system. It plays a role of control, detection, protection and regulation, and is one of the basic components in modern electrical devices.

Ii. Classification and structure principle of relay of liquid packaging machine; Packaging machine relay classification

Classification and structure principle of relay of liquid packing machine; There are many kinds of relays of the automatic vacuum packing machine. According to its role in the automatic control system of electric drive, it can be divided into control relay and protection relay.

Classification and structure principle of relay of liquid packing machine; There are a variety of control relays for packaging machinery and equipment, but the most commonly used are thermal relays and electromagnetic control relays. In addition, electronic time relay and motor protector applications are also expanding. According to the nature of the input signal, the control relay can be divided into:

(1) voltage relay. It ACTS when the voltage of the control circuit reaches a set value to open or break the controlled circuit.

(2) current relay. It ACTS when the control circuit current reaches a set value to open or break the controlled circuit.

(3) intermediate relay. It is still a voltage relay in essence, but it is added between an electrical appliance and the controlled circuit to expand the number and capacity of the control contacts of the previous appliance.

(4) time relay. After knowing the action signal, it makes the contact move after a certain period of time through electromagnetic machine, mechanical mechanism or electronic circuit, so as to realize the timing control of the control system.

5. Thermal relay. It is still a current relay in essence, which usually takes advantage of the characteristic of bimetal sheet being heated and bent. When the current exceeds the set value and lasts for a certain time, the bimetal sheet pushes the mechanism to move, so as to realize overload protection.

Temperature relay. It operates when the temperature reaches the set value to realize overheat (or overload) protection and temperature control.

According to the working principle, the control relay can be divided into electromagnetic test relay, thermal relay, electrodynamic relay, transistor type or integrated circuit type relay.

Iii. Classification and structure principle of relay of liquid packaging machine; Structure principle of relay of automatic packing machine

Classification and structure principle of relay of liquid packing machine; Relay is an automatic electrical appliances, according to a certain signal, such as current, voltage, time, temperature and speed, to switch on or off the small current circuit and electrical control components,J is widely used for motor or line protection and production process automation control. It has an input circuit and an output circuit. The input amount is usually voltage, current and other electric quantity. It can also be humidity, pressure, light, sound or other non-electric quantity. When the input amount changes to a certain value, the relay will act and switch on or off the control loop.

Classification and structure principle of relay of liquid packing machine; Air vacuum packaging machine and box packing machine relay is generally not used for direct control of main circuit, but by contactor or other electric equipment to control the main circuit, therefore, compared with the contactor, relay contactor (point) breaking capacity is small, generally does not need to arc extinguishing device, simple structure, small volume, small quality, but higher demands to the accuracy of the relay operation.

Classification and structure principle of relay of liquid packing machine; Although the input signals and operating principles of relays are different, their basic structure is composed of sensing components, intermediate components and executing components. The sensing component transmits various physical quantities detected to the intermediate component, and the intermediate component compares the input physical quantities with the set value. When the value is reached, greater than or less than the set value, the intermediate component outputs a signal to enable the execution of the component action, and to connect or disconnect the control circuit.