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What about the emp failure
The rated voltage of the electromagnetic valve wires is dc12v, dc24v, ac24v (50/60hz), ac110v (50/60hz), ac220v (50/60hz) and ac380v (50/60hz)。
In electrical design, either ac220v is used (without switch power, low cost, simple line and easy to maintain) or dc24v (commonly used safety voltage, switch power/em valve wires are easily repaired and replaced)。
How to detect the electromagnetic valve
The electromagnetic valve is good if the control medium has a change in the state of the controlled medium (liquid, gas with pressure, pressure value is the middle of the pressure range used by the electromagnetic valve), or if the controlled medium has a change in the state of the medium from passing through to breaking to breaking, otherwise it is problematic。
Is there a common malfunction of the electromagnetic valve
1. Short or broken circuits:
Method of detection: first measure their breakage with a universal scale, with a barrier approaching zero or infinity, which means a short or broken loop. If the resistance is normal (perhaps dozens of euros), it cannot be said that the coil must be good (i measured an electromagnetic valve cable value of approximately 50 om at one time, but the electromagnetic valve was unable to move and replace it with everything normal), do the following final test: find a little screwdriver near the metal pole that's worn in the electromagnetic valve, and then give the electromagnetic valve electricity, which is good if it feels magnetic, or bad。
Treatment: replacement of electromagnetic valve wires。
2. Plugin/plugin problem:
Fragmentation: if the electromagnetic valves have the type of plugs/plugs, there may be a problem with the metal reeds of the plugs (which the pens have encountered), a problem with the plug-in of the head wires (which is the same as the one used in the pen). For example, it is impossible to get the power into the loop for reasons such as connecting the power line to the ground line. It is best to develop a habit of plugging a fixed screw on the plug and screwing a fixed nut on the ring after the valve pole。
If the electromagnetic valve wire is plugged with a light-emitting diode power signal, the signal will not be activated if the dc power-driven electromagnetic valve is used. In addition, no power plugs to the luminous second-stage power source indicator should be diverted from the different levels of voltage, which would result in the burning of the luminous diode/power source (replaced by a low-voltage plug) with short circuits or light to light the luminous diode (replaced by a high-voltage plug)。
If there is no power signal, the electromagnetic valve wire does not distinguish between polarity (a transistor time relay that does not have a direct wire voltage, as well as a conical intermediate relay that has a direct flow on the coil with a diode/tempo leak circuit, need to distinguish polarity)。
Method of handling: fix wire error, fix or replace plugs, plugs。
3. Valve core issues:
Fault phenomenon 1: when the medium of the electromagnetic valve is under normal pressure, the manual button of the electromagnetic valve red is pressed, and the electromagnetic valve does not react at all (the pressure medium does not show a broken change), indicating that the core must be broken。
Method of treatment: check whether there is a problem with the medium, such as whether there is a significant amount of water in the compressed air (sometimes the oil-water separators are not very effective, especially when compressed air reaches the electromagnetic valve when the pipeline is poorly designed) and whether there is a significant amount of impurities in the condensed liquid medium. The electromagnetic valves and the water or impurities in the pipes are then removed. If not, please repair (if you have time to be patient and necessary @) or replace the valve core or simply replace the entire electromagnetic valve。
Fragmentation phenomenon 2: following a check, the coil is the original coil and the magnetic properties are normal when the coil is electrocuted, but the electromagnetic valve is still inactive (at which time the function of the manual button of the electromagnetic valve may be normal), indicating that the core is bad。
Treatment: please repair or replace the core or simply replace the entire electromagnetic valve。
As for the maintenance of electromagnetic valve valves, because there are so many kinds of maintenance methods, i can't say much, so i will not repeat them here。
Electromagnetic valve failure and removal
I. Non-working of electromagnetic valves
Check if the power lines are poorly rewired and plug-in
Check if the power voltage is in the normal range of ± work-to-work
Is the ring welded
Short circuits to replace them
Whether the working pressure differential is inappropriate to adjust the pressure differential or replace the corresponding electromagnetic valve
Fluid temperature excessive replacement of corresponding electromagnetic valves
An impurity to wash the main valve core and the kinetic card of the electromagnetic valve, and if sealed damage occurs, replace the seal and install filters
It's too sticky, too high and too long to replace
Ii. Electromagnetic valves cannot be shut down
Seal seals for the main valve or iron core have been damaged to replace seals annex
Fluid temperature, excessive viscosity, replacement of counterpart's electromagnetic valves
There's impurities entering the electromagnetic valve or the kinetic core for cleaning
Spring life reached or deformed
The throttle balance hole is blocked and cleaned in time
Too high a frequency of work or end of life to select or update products
Iii. Other information
Internal leak check if the seals are damaged and the springs poorly fitted
Loosed or sealed at leak link or broken screw or replaced seal annex
There's a noise on the head of the battery, and it's loose and tight. The voltage fluctuations are not allowed and the voltage is adjusted. Insorption of impurities with iron cores or non-alignments, and timely cleaning or replacement。
On the spot, quickly judge the way the electromagnetic valve works
First, check if the electromagnetic valves are malfunctioning?
The signal to the two valves on dcs is turned on or off, then the electromagnetic valves are shown to lose power and are usually heard on site. If you can't hear me, there must be a problem with the wire. Is there a problem with the electromagnetic valve itself
If there is an electromagnetic loop problem, check first to see if there is a faulty connection or short circuit, if there is no problem on the line, the electromagnetic valve wire is burned, it can be removed, measured on a universal watch, and if the circuit is opened, the electromagnetic valve wire is burned. The reason for this is the tidalization of the coil, which causes insulation and magnetic leakage, resulting in excessive electrical flow and burning within the coil, thus preventing rain from entering the electromagnetic valve. In addition, too hard springs, too much reaction, too few coil numbers and insufficient suction can also burn the coil。
Secondly, if the wire is good, it's the electromagnetic valve itself。
It's usually possible to use a word from 1 to 0 at the manual adjuster, to open the valve, which, if you can open it, is really a coil problem. If you can't open it, remove the magnetic valve, see if it's stuck, or if there's a pellets jam, and clean it properly with ccl4, but given the fact that there are no conditions at the scene, you can use gasoline, there's no water, there's no water available, and then you can dry it with an on-site meter gas, and when you remove it, remember the order of the parts, and if you don't notice, you can easily make a mistake
