What is a solenoid valve?
Solenoid valve is an industrial device controlled by electromagnetic. Which is an automation basic element for controlling fluids (such as liquid, gas, etc.) and belongs to a kind of actuator. It uses an electromagnet to generate a magnetic field, and uses the magnetic field force to manipulate the movement of the valve core, thereby changing the opening and closing state of the valve to achieve control of fluid flow. Solenoid valve is widely used in industrial automation control systems to adjust parameters such as direction, flow, speed and pressure of the medium.
Importance of solenoid operated valve symbol.
Design:
1. System Planning
When designing a hydraulic or pneumatic system, the solenoid operated valve symbol can help engineers intuitively determine the type (such as two-position two-way, three-position four-way, etc.), quantity and working position of the required solenoid valve. For example, when designing the control system of an automated production line, a reasonable fluid control scheme can be planned through the solenoid operated valve symbol to achieve precise control of each mechanical action.
2. Selection and matching
According to the information contained in the solenoid operated valve symbol, such as rated flow, working pressure, solenoid coil voltage, etc., the appropriate solenoid valve can be selected to match the other components in the system. For example, in a high-pressure hydraulic system, the solenoid valve that can withstand the pressure can be accurately selected based on the symbol to ensure stable operation of the system.
Installation and commissioning:
1. Installation Instructions
The solenoid operated valve symbol can guide technicians to perform correct installation, including determining the installation location and direction of the solenoid valve and the direction of the connecting pipes. For example, when installing a pneumatic system, the air inlet, air outlet, and working port can be accurately connected to the corresponding pipelines according to the symbols to avoid installation errors.
2. Debugging assistance
During the system debugging phase, the solenoid operated valve symbol helps technicians understand the control flow of the system. By comparing the symbols and actual operating conditions, it is possible to check whether the power-on sequence and time of the solenoid valve meet the design requirements, which facilitates the adjustment of the solenoid valve action. For example, when debugging the control system of an industrial robot, check the working condition of the solenoid valve according to the symbols to ensure that the robot moves accurately.
Maintenance and troubleshooting:
1. Daily maintenance
The solenoid operated valve symbol can help maintenance personnel understand the role of the solenoid valve in the system and facilitate regular inspection and maintenance of its key components (such as solenoid coil, valve core, etc.). For example, in the water supply and drainage system, after the maintenance personnel know the function of the solenoid valve according to the symbols, they can focus on checking its sealing and electromagnetic performance.
2. Troubleshooting
The solenoid operated valve symbol is an important clue when the system is malfunctioning. Maintenance personnel can determine which solenoid valve has a problem based on the fault phenomenon and symbols, and then check for fault causes such as solenoid coil damage and valve core sticking. For example, in an automobile production line, if a pneumatic device fails, maintenance personnel can use symbols to find the relevant solenoid valve for inspection and repair.
Solenoid operated valve symbol electrical schematic.
There are many electrical schematic diagrams of solenoid operated valve symbols, this is just a part of them.
The meaning of solenoid operated valve symbol：
The solenoid operated valve symbol is usually composed of boxes, arrows, characters, etc., which are used to indicate the solenoid valve’s working position, interface connection status, control signal and other information.
- Box: Indicates the working position of the solenoid valve. Each box represents a working position, i.e., a “position”. For example, a three-position solenoid valve has three boxes, indicating three working positions.
- Arrow: Indicates the flow direction of the fluid in the solenoid valve. It should be noted that the direction of the arrow does not necessarily indicate the actual direction of the liquid flow, but rather indicates that the oil circuit or gas circuit is connected.
- Character: Used to indicate the interface connection status and control signal of the solenoid valve. For example, “P” represents the inlet end, “A”, “B”, etc. represent the interfaces connected to the actuator, “R” represents the outlet, “T” represents that the interface is blocked, etc.
- The number of interfaces: The number of interfaces connected to the outside of the box indicates the number of ”way”.
Requirements for solenoid operated valve symbol in different industries.
The demand for solenoid operated valve symbol in different industries does vary, which is mainly due to the different application scenarios, functional requirements and system complexity of solenoid valves in various industries. The following is a brief description of the solenoid operated valve symbol requirements in several typical industries:
1. Process industries
Demand characteristics: In process industries, such as chemical, petrochemical, pharmaceutical, etc., solenoid valves are usually used to control the flow of fluids (such as gases and liquids) to ensure the stability and safety of the production process. The demand for solenoid operated valve symbols in these industries mainly focuses on being able to clearly indicate the type of solenoid valve (such as direct-acting, pilot-operated, etc.), function (such as normally open, normally closed, self-locking, etc.) and connection relationship (such as air inlet, exhaust port, working port, etc.).
Symbol application: On the flow chart with control points (PID diagram), the solenoid operated valve symbol needs to accurately reflect its position and connection relationship in the actual production process so that technicians can quickly identify and operate it.
2. Machinery Industry
Demand characteristics: In the mechanical industry or electromechanical integration of gas, hydraulic transmission system, solenoid valve is mainly used to control the movement of pneumatic or hydraulic actuator components. The demand for solenoid operated valve symbol in these industries is to be able to concisely and clearly indicate the working status of the solenoid valve (such as the fluid flow direction when powered or powered off) and the connection method.
Symbol application: In the pneumatic or hydraulic diagram of a mechanical system, the solenoid operated valve symbol needs to clearly display its control logic and execution effect so that technicians can debug and maintain the system.
3. Automated control system
Demand characteristics: In the automation control system, the solenoid valve is an important actuator, and its symbol needs to accurately reflect its position and function in the control system. These systems usually involve complex control logic and sensor networks, so the solenoid operated valve symbol needs to be able to coordinate with the symbols of other control elements (such as sensors, controllers, etc.) to form a complete control system diagram.
Symbol application: In the design documents and drawings of the automation control system, the solenoid operated valve symbol needs to accurately represent its control logic and execution effect so that technicians can program and debug the system.
4. Other industries
Demand differences: In addition to the above industries, there are many other industries (such as food, textile, papermaking, etc.) that also have specific requirements for solenoid operated valve symbol. These needs are usually related to the industry’s specific process requirements, working environment and fluid medium.
Symbol adaptability: In order to meet the specific needs of different industries, the solenoid operated valve symbol needs to have a certain degree of flexibility and adaptability. For example, in the food industry, the solenoid operated valve symbol may need to specifically indicate its material and hygiene grade. In the textile industry, the solenoid operated valve symbol may need to indicate characteristics such as corrosion resistance and wear resistance.
Different types of solenoid operated valve symbol:
Hydraulic solenoid operated valve symbol
In addition to the basic elements representing the solenoid valve working position, port and electromagnetic control, the hydraulic solenoid operated valve symbol also involves markings related to the hydraulic system. Generally, “P” represents the oil inlet, “T” represents the oil return port, and “A” and “B” represent the working ports for connecting hydraulic cylinders and other actuators. It is used in hydraulic systems to control the flow direction, pressure and flow of hydraulic oil to drive the hydraulic actuator.
Pneumatic solenoid operated valve symbol
The pneumatic solenoid operated valve symbol is similar to the hydraulic solenoid operated valve symbol, but is used in pneumatic systems. Generally, “P” represents the air inlet, “T” represents the exhaust port, and “A” and “B” represent the working ports connected to actuators such as cylinders. It controls the flow direction of compressed air, thereby controlling the extension and retraction of the cylinder and other actions. It is commonly used in automated production lines, pneumatic tools and other occasions.
Single solenoid operated valve symbol
The single solenoid operated valve symbol usually consists of a box representing the valve body, lines within the box representing the position of the valve core, and a solenoid coil symbol.For example, in a simple single-control two-position two-way solenoid valve, power is applied to move the valve core to control the opening or closing of the fluid.
Double solenoid operated valve symbol
There are two solenoid coils in the double solenoid operated valve symbol. Generally, two boxes are used to represent different working positions. Each box corresponds to the valve core position and port connection status when a solenoid coil is energized. Double solenoid valves are often used in three-position valves, where two solenoid coils control the movement of the valve core in two directions respectively. When both coils are out of power, the valve core is in the middle position, achieving more complex fluid control functions. Such as in some hydraulic or pneumatic systems that require precise control and have multiple working states.
Three-way solenoid operated valve symbol
The three-way solenoid operated valve symbol has three ports, and the connection relationship between the ports in different working positions is usually indicated by lines and markings in a square box. The most common ones are two-position three-way and three-position three-way. The two-position three-way solenoid valve has two working positions. In one position, the fluid flows from port P to port A, and in the other position, the fluid flows from port P to port B (or port P is connected to port T, etc.). The three-position three-way solenoid valve has an intermediate position function, which can realize different fluid control strategies.
How to choose the right Chinese solenoid valve factory and manufacturer?
1. Quality assurance
Certification status: Priority is given to manufacturers that have passed international quality system certification such as ISO, which indicates their production management standards. For example, ISO 9001 certification ensures consistent product quality.
Production process: Advanced technology such as precision machining technology can ensure the performance of the solenoid valve. Such as the use of high-precision molds and automated production lines to reduce human errors.
Detection methods: Complete testing equipment and processes, such as flow, pressure, and sealing tests, can ensure that the products leaving the factory are qualified.
2. Production and delivery capabilities
Production scale: Manufacturers with larger production scales have more advantages in dealing with large orders and can ensure on-time delivery. For example, a large solenoid valve factory can produce thousands of solenoid valves per day.
Lead Time: Understand the lead time of conventional and customized products, with short lead times to meet urgent project needs.
3. Technology R&D strength
R&D team: Professional R&D personnel are the guarantee of product innovation and can continuously improve the performance of solenoid valves and develop new products.
Patented technology: Manufacturers with patents are more competitive in technology, for example, they have innovative technologies in energy saving and durability.
4. After-sales service
Technical support: Able to provide technical support such as installation, debugging and troubleshooting to ensure the normal use of the solenoid valve.
Warranty Policy: Reasonable warranty period and scope can reduce user costs and risks.
International buyers demand for Chinese solenoid valve symbols:
- Symbol standardization: It is required to adopt internationally accepted standards such as IEC standards to facilitate international design communication and collaboration and avoid misunderstandings due to symbol differences.
- Symbol accuracy: The symbols must accurately and clearly display the solenoid valve working position, port and electromagnetic control method and other information to ensure that buyers accurately understand the product functions.
- Product consistency: The functions and parameters represented by the symbols must be consistent with the actual product to ensure that the system operates normally when the buyer uses it.
- Multi-language labeling: There are multi-language labels such as English to facilitate buyers with different language backgrounds to understand and operate.
