Service life of interlocking components
Thread Content
Our company has many interlock systems, and malfunctions in these interlocks often cause the equipment to shut down. The reasons for this include faulty operation of solenoids, malfunctioning relays, and problems with primary instruments. Should these interlock components be inspected and replaced on a regular basis? And if they appear to be functioning properly during inspections, how can we ensure their reliable operation over time? If these components are replaced regularly, what is the service life?
Original poster, safety interlock devices must be regularly and thoroughly inspected, and a maintenance history file should be kept. Generally, the service life of components such as solenoid valves is calculated based on the number of operations and the normal usage frequency specified by the manufacturer (a safety factor is also added to take into account factors such as the environment).
Reply to 2# king70868: Conduct regular inspections, and be sure to carry out test checks before driving after maintenance.
The quality of components in the interlocking circuit must be of higher standard.
Service life of safety interlock devices 1. Establish service life records (primary meter, secondary meter)； 2. Establish equipment records for solenoid valves and relays regarding the replacement cycle of primary meters; generally, these meters need to be replaced after 2/3 of their total operating cycles have elapsed ； 3. The primary and secondary meters of the safety interlock device must be of high quality ；
In safety interlock systems, why not consider using more mechanical interlocks? Abroad, when the equipment is in a non-production state such as during maintenance, mechanical interlocks are increasingly being used instead of electrical interlocks. Mechanical interlocks are more reliable than electrical ones and meet the requirements of \"inherent safety\".