Case analysis of magnetic induction switch fault of brake cylinder


Generally speaking, the principle of the magnetic induction switch of the brake cylinder is that the cylinder is equipped with a magnet. When the brake cylinder is located in this position, the magnet provides a signal to the magnetic induction switch, so as to connect the magnetic induction switch. Then, let's understand the fault case analysis of the magnetic induction switch of the brake cylinder together.

Cylinder with magnetic ring and magnetic induction switch

The reason for the failure of the magnetic induction switch of the brake cylinder is that after the cylinder arrives, the magnetic induction switch does not light and there is no output. The reasons are generally as follows.

1. The cable connection is faulty. Magnetic induction switch is divided into three wire type and two wire type, please pay attention to the wiring

2. The magnetic switch of the cylinder is not installed in the magnet position of the cylinder. In this case, just move the position of the cylinder magnet.

3. If the magnetic induction switch of the cylinder is damaged, replace it and perform new fault diagnosis.

 

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4. There is another special case. This is what happened to me. The brake cylinder magnetic sensor switch is also on. When you detect a signal, it has an output, but occasionally it sends a signal that can't be triggered. Sometimes the phenomenon is that the equipment suddenly does not move in operation, and there is no alarm. However, if you manually move the position of the magnetic sensor switch from the bright spot to the bright spot, the device will start again (or manually pull out the cylinder, retract, and try to enter automatic mode. This method must be programmatically supported). In this case, please replace the cylinder magnetic induction switch. The equipment runs normally and has been running for about 4 months. The inspection procedure is repeated and the same procedure and equipment are compared. There is no magnetic induction of the cylinder, but the rising signal in the PLC cannot be triggered (the rising and falling edges send signals instantaneously. Finally replace the cylinder magnetic induction switch for fault diagnosis)

Finally share the experience of PLC programming, the general use of brake cylinder magnetic induction switch, we all like to use the rising signal or falling signal. Therefore, when encountering the fourth case, it is recommended to replace the magnetic induction switch first. According to maintenance theory, when the cause of the failure cannot be determined, the elimination method is used, but the cheaper electrical parts must be replaced first.

PS: The inner part of the reed of the magnetic induction switch is a mechanical structure, and the inner part of the hole is an electronic part. The switch is the clarinet. Clarinet, also known as magnetron, is a switching element controlled by magnetic field signals, which is not shielded by magnetic field and can be used to detect the state of circuit and mechanical movement.

The above introduction is the brake cylinder magnetic induction switch fault case analysis, because there is no need to set the pilot valve and its mounting bracket at both ends of the brake cylinder stroke, no need to set the baffle at the end of the piston rod, so it is convenient to use, compact, high reliability, low cost, switch response time is fast, response is wide.

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