Today we're talking about an electromagnetic valve. Friends in the electrical automation industry need to learn not only about electricity control but also about gas control. Control equipment actions can be powered by electric power drives or by compressing gases to control tank movements. And the electromagnetic valve is the switch that controls the cylinder。
Introduction to the electromagnetic valve
The electromagnetic valve is literally understood as follows. Valve: the switch. You can turn it on or off. Electromagnetic: it means that the switch is controlled by the insulation of the electromagnetic magnet. Thus the electromagnetic valve is the switch using the electromagnetic control valve, the automated infrastructure used to control the fluid, which is an implementer. Other functions, such as direction, flow, speed, etc. Can be adjusted in industrial control systems. There are many kinds of electromagnetic valves, and different electromagnetic valves function differently in different locations of the control system. What we are talking about today is the electromagnetic valve, which adjusts the fluid direction. Fluids contain gases and liquids。
Meaning of the appearance and graphic symbol of the electromagnetic valve
For example, two five electromagnetic valves (ps) are also called an inhaler vent, which requires a pump or a gas source. There are two vents r and s on both sides of the p-hole. In order to reduce noise, silencers can be used. Two holes in the upper vent a and b. Get to the cylinder, r is an a vent, s is a b vent。
Lines are springs, squares are threads, and a small triangle is a lead electromagnetic valve。
The location of the valve is shown in boxes, and several boxes indicate a few “bits”. The number of squares on the electromagnetic valve can be observed and the working position of the core can be judged. There are several boxes. For example, there are two boxes, red and green, indicating two valves。
The number of points connected up and down within a box is several, which means a few “passes”. Similarly, the following figure shows five nodes linked to the top and bottom frames in the red box。
The arrow in the box indicates that the current position airway is connected, but the arrow direction does not necessarily indicate the actual direction of the fluid。
Box symbol "
"or "
It's not working。
The work of the electromagnetic valve
This describes the working principles of the electromagnetic valves, which, in order to understand how the electromagnetic valves adjust their fluids, need to know the working principles of the electromagnetic valves, which need to control the use of gas cylinders or tanks, and the oils and gases are only controlled media in the same way。
We present the two single-controlled electromagnetic valves that control the cylinder. Electromagnetic valves have closed cavities, with opening holes in different locations, each of which is connected to a different pipe, and in the middle is a core of a piston-like valve (one side of the valve is an electromagnetic magnet and the other side is a spring)。
The coil is attracted by electric steel cores, which turn on or off different vents by controlling the movement of valve cores, while the vents are frequently open, and the gas enters into different vents, then pushes the pistons of the cylinders through the pressure of the gas, and pushes the pistons, which drive the mechanical devices. Mechanical motion is thus controlled by the control of electro-magnetic circuits。
Emps can work in two ways, with the early invention of direct electromagnetic valves and their subsequent evolution to lead electromagnetic valves。
Direct electromagnetic valves: the direct motion is the direct use of the coil to generate electromagnetic power that directly drives the electromagnetic valve core to break between airways。
Lead electromagnetic valves: the first course is to open the lead valves by generating electromagnetic forces through the coil, allowing the pressure to drive the electromagnetic valve core motion to break between the circuits. This allows a small electromagnetic power to change the route inside the valve and then to change the main valve core position and reduce the use power。
Emp manual control principles
Attention needs to be paid to the manual buttons of the electromagnetic valves, which are designed to facilitate debugging, with separate locations near the online loops, some press, some dial, and then push the cores of the valves (directly dial the main valves of the electromagnetic valves, first-directed lead valves) to the same effect as the electro-altering valve cores。
