What is the working principle of LOGIC VALVE?

LOGIC VALVE is a valve specially used in automatic control systems. It can control the flow of fluid according to the logical state of the input signal. Its working principle is based on basic logical operations, such as AND, OR, NOT, etc.

1. The logic valve determines the output signal by performing logical operations on the input signal, thereby controlling the opening or closing of the valve. These input signals can be electrical signals, pressure signals, or other types of control signals. The design of the logic valve enables it to achieve complex fluid control based on the combination of these signals.

2. Detailed explanation of the working principle
AND logic valve: The AND logic valve requires that all input signals are at a high level at the same time before the valve opens. Its working principle is as follows.
Input signal: Usually two or more electrical signals, such as input A and input B.
Logical judgment: When input A and input B are both at a high level, the logic circuit inside the logic valve will issue an opening command.
Valve state: The valve will only open and the fluid can pass only when all conditions are met.
This type of logic valve is suitable for situations where multiple conditions need to be met at the same time. For example, in a hydraulic system, fluid flow can only be allowed when multiple sensors detect safety signals to prevent accidents.
Or logic valve: In contrast to the logic valve, the or logic valve only needs one input signal to be high for the valve to open:
Input signal: input A and input B.
Logic judgment: If either input A or input B is high, the logic valve immediately issues an opening command.
Valve state: The valve will open when any condition is met, allowing fluid flow.
This type of valve is often used in situations where redundant safety measures are required, such as in a pneumatic system, if one signal fails, the other signal can still ensure the normal operation of the system.

Non-logic valve: The non-logic valve works in the opposite way to the input signal.
Input signal: There is only one input signal A.
Logic judgment: When input A is high, the valve is closed; when input A is low, the valve is open.
Valve state: This design can achieve reverse control and is suitable for specific safety and control needs.
Non-logic valves are often used for system safety protection. For example, in gas transmission systems, when an excessively high pressure signal is detected, the valve will be closed immediately to prevent leakage or explosion.

3. Application scenarios
Logic valves are widely used in many fields, and the specific scenarios are as follows.
Automated production line: Logic valves are used to control the fluid switches of equipment such as robotic arms and conveyor belts to achieve highly automated production processes.
Hydraulic system: In hydraulic cylinders, logic valves can control the flow of fluids according to different sensor signals to ensure precise operation of equipment.
Pneumatic control: Used for the control of pneumatic equipment to ensure timely switching of airflow and optimize production efficiency.
Water treatment facilities: In the water treatment process, logic valves can automatically control the distribution and processing of water flow to improve processing efficiency.
The working principle of logic valves is based on basic logical operations. Through intelligent processing of input signals, precise control of fluid flow is achieved. Its AND, OR, and NON logic valves have their own characteristics to meet different application requirements.