SMC solenoid valve structure type, Japanese SMC solenoid valve
The structure of the SMC solenoid valve is easy to control the internal leakage until it is reduced to zero. Therefore, solenoid valves are particularly safe to use, especially for corrosive, toxic or low-temperature media.
SMC solenoid valve system is simple, then connect to the computer, the price is low. The solenoid valve itself has simple structure and low price. It is easier to install and maintain than other types of actuators such as regulator valves. What's more, the system is much simpler and much cheaper. Since the solenoid valve is a switch signal control, it is very convenient to connect with the industrial control computer. In today's era of computer popularity and price decline, the advantages of electromagnetic valves are even more obvious. SMC solenoid valve action Express, small power, light shape. The response time of the solenoid valve can be as short as several milliseconds. Even the pilot solenoid valve can be controlled within dozens of milliseconds. Due to its self-contained loop, it is more sensitive than other self-controlled valves. 5, the properly designed electromagnetic valve coil power consumption is very low, is an energy-saving product; It can also be done only by touching the action, automatically maintaining the valve position, usually does not consume electricity at all. Electromagnetic valve shape size small, not only save space, but also light and beautiful. The adjustment precision of electromagnetic valve is limited, and the applicable medium is limited. The solenoid valve usually has only two states of switch. The valve core can only be in two limit positions and can not be continuously adjusted.(There are many new ideas that try to break through, but they are still in the trial stage), so the adjustment accuracy is also limited. The SMC solenoid Valve has high requirements for the cleanliness of the medium, and the granular medium can not be applied. If it is an impurity, it must be filtered first. In addition, viscous media can not be applied, and the viscosity range of media suitable for specific products is relatively narrow. 8, SMC solenoid valve model variety, wide use. Although the electromagnetic Valve has a congenital deficiency, the advantages are still very prominent. Therefore, it is designed into a variety of products to meet various needs and has a wide range of uses. The progress of electromagnetic valve technology is also centered on how to overcome congenital defects and how to better exert its inherent advantages.
The SMC solenoid valve is an industrial device controlled by electromagnetic force. It is used in industrial control systems to adjust the direction, flow, speed, and other parameters of the medium. There are many types of solenoid valves. Different solenoid valves play a role in different positions of the control system. The most commonly used is a one-way valve. Safety valve, direction control valve, speed control valve, etc.. The electromagnetic valve is controlled by the electromagnetic effect. The main control method is controlled by the relay. In this way, the electromagnetic valve can cooperate with different circuits to achieve the expected control. The accuracy and flexibility of the control can be guaranteed. The rod-shaped object in the figure is an electrically controlled stem, which can be opened or closed by electromagnetic force. The pneumatic system is used as an example to illustrate the application of electromagnetic valves in industrial control. The pneumatic system is a control system with gas as the medium. In the pneumatic system, the dielectric of this energy is usually air. When it is really used, Compressed air is typically compressed to increase pressure by acting on the piston or blade. In pneumatic systems, the role of the electromagnetic valve is to adjust the various states of compressed air in the control system according to the requirements of the control system. The pneumatic system also requires the cooperation of other components, including power elements, actuators, and switches. Display equipment and other auxiliary equipment. Power elements include all kinds of compressors, actuators include all kinds of cylinders. These are pneumatic systems.
The valve body is an important equipment to realize the control algorithm. For example, a one-way valve allows compressed air to enter the tank from the compressor, and when the compressor closes, it prevents the compressed air from flowing in the opposite direction; When the pressure in the tank exceeds the permissible limit, the relief valve can discharge the compressed air; The direction control valve controls the direction of movement by alternately pressurizing and venting the two cylinders; The speed control valve can realize the stepless speed of the actuator simply. Gas Road System: Oil Road System: Refrigeration System: A intake filter J tank PB refrigeration compressor air intake valve K thermostat bypass valve Q condenser C compressor host L oil cooler heat exchanger D one-way valve M oil filter S bypass system EF air / Oil separator N return oil valve T air exit filter minimum pressure valve O cut off oil valve G rear cooler H with automatic water separator pneumatic system schematic electromagnetic valve can be applied not only in pneumatic system, in hydraulic system, The same or similar applications can be obtained in hydraulic systems, such as low power non-oil supply small electromagnetic switch valves, seals do not need oil supply, exhaust gas does not pollute the environment, can be used in food, medicine, electronics and other industries. Electromagnetic directional valve Now, electromagnetic valve technology combined with control technology, computer technology, electronic technology, has been able to carry out a variety of complex controls. For example, electromagnetic valve can be applied to the intelligent control collar, The solenoid Valve has good interface with various electronic systems because it can be controlled by electromagnetic. Electromagnetic Valve has been widely used in various fields of production. With the improvement of electromagnetic control technology and manufacturing technology, electromagnetic valve can achieve more sophisticated control. The working principle of the electromagnetic valve: The working principle of the electromagnetic valve: There is a closed cavity in the electromagnetic valve, and there are open holes in different positions. Each hole leads to different tubing, with a valve in the middle of the cavity and two electromagnets on both sides. Which side of the magnet coil will be attracted to which side of the valve body, by controlling the movement of the valve body to block or leak out different oil discharge holes, and the oil hole is usually open, the hydraulic oil will enter the different exhaust pipes, The piston drives the piston rod and the piston rod drives the mechanical device. In this way, the mechanical motion is controlled by controlling the current of the electromagnet.

One: There are two types of DC type solenoid valves: constant closed type and constant open type. The closed type is closed when the power is cut off. When the coil is energized, electromagnetic force is generated, so that the dynamic iron core can overcome the spring force and the static iron core suction directly. Open the valve, the medium is a path; When the coil is powered off, the electromagnetic force disappears, the moving core is reset under the action of the spring force, and the SMC solenoid valve is directly closed. The valve mouth and medium do not pass. The structure is simple, the action is reliable, and the zero pressure difference and microreal. Work normally under air. The constant opening type is just the opposite. Such as an electromagnetic valve less than φ 6 flow diameter. (Figure 1 is a typical structure diagram) Two, step by step vertical type solenoid valve is used to open the valve and secondary valve connected, the main valve and guide valve step so that the electromagnetic force and pressure difference directly open the main valve. When the coil is energized, an electromagnetic force is generated to allow the moving core and the static core to suck. The guide valve opening and the guide valve opening are located on the main valve opening, and the moving core is connected to the main valve core. At this time, the pressure of the main valve upper cavity is discharged through the guide valve opening. At the same time as the pressure difference and the electric magnetic force, the main valve core is moved upwards to open the main valve medium circulation. When the coil is powered off, the electromagnetic force disappears. At this time, the moving iron core closes the guide valve hole under the action of the weight and spring force. At this time, the medium enters the main valve core cavity in the balance Kongzhong, At this time, the main valve is closed under spring reset and pressure. (Figure 2 is a typical structure diagram) III, indirect pilot type electromagnetic valve This series of electromagnetic valve is formed by the combination of the pilot valve and the main valve core; When the coil is energized, the magnetic force generated causes the dynamic core and the static core to suck. The guide valve opens and the medium flows to the exit. At this time, the pressure on the upper cavity of the main valve core decreases. Lower than the pressure on the inlet side, The pressure difference is formed to overcome the spring resistance and then move upwards to achieve the purpose of opening the main valve, the medium is circulating. When the coil is cut off, the magnetic force disappears, and the moving iron core is reset and closed under the spring force. At this time, the medium flows from the balance hole., the pressure on the upper cavity of the main valve core increases, And under the action of spring force to move down, close the main valve. The normal opening principle is just the opposite, such as: SLA, DF(φ 15 caliber), ZCZ, etc.. The fluid in the applicable line must be consistent with the calibrated medium in the selected series. The temperature of the fluid must be less than the calibration temperature of the selected solenoid valve. Electromagnetic valve allows liquid viscosity generally below 20 CST, greater than 20 CST should be noted. Working pressure difference, pipeline maximum pressure difference should be less than 0.04 MPa, such as ZS, 2W, ZQDF, ZCM series and other vertical and step vertical; When the minimum working pressure difference is greater than 0.04 MPa, pilot(pressure difference) solenoid valve can be selected; The maximum working pressure difference shall be less than the maximum calibration pressure of the solenoid valve; General solenoid valve is one-way work, so to note whether there is a reverse pressure difference, if installed check valve. When fluid cleanliness is not high, the filter should be installed in front of the electromagnetic valve. Attention to flow aperture and take-over aperture; The solenoid valve is generally only controlled by two switches; Conditions permit installation of bypass pipes for easy maintenance; Customize the opening and closing timing of the solenoid valve when there is a water hammer phenomenon. Note the influence of ambient temperature on the power supply current and power consumption should be selected according to the output capacity. The power supply voltage is generally allowed to ± 10 %. Second, reliability solenoid valves are divided into two types: normally closed and often open; General selection of the regular closed type, power opening, power off closed; However, when the opening time is very long, it is necessary to use the open type. Life test, the factory generally belongs to the type of test project. When the action time is short and high frequency, direct type is usually selected. Third, safety solenoid valve is not waterproof, when the conditions are not allowed, please choose waterproof type, the factory can make. The maximum nominal pressure of the solenoid valve must exceed the maximum pressure in the pipeline. All stainless steel should be used for corrosive liquids, and plastic King(SLF) electromagnetic valve should be used for strong corrosive fluids. Explosive environment must choose the corresponding explosion-proof products. Fourth, the economy has a lot of solenoid valves can be used in general, but on the basis of meeting the above three points, we should choose the most economical products.