Entry Looper in Steel Processing
During the galvanization process of steel, metal rolls pass through the accumulator (entry looper). This section spans multiple levels and regulates the flow and tension of the steel strips, ensuring a continuous and controlled feed. Personnel regularly need access to this area for specific tasks.
Le défi
Previously, fixed guards were used, which operators would remove when access was required. This practice often resulted in damaged guards and exposed operators to hazards if the guards were not re-bolted properly. Hence, the customer upgraded to movable guards that require interlocks. In addition, due to the vast size of the area, running cables across multiple levels also presents challenges.
La solution
mGard
Fortress proposed a trapped key system with mGard mechanical interlocks. A key-operated switch is used to isolate power to the machine. The transfer of the key to the key exchange device releases the access keys that allow opening the respective interlocks on the upper levels. The machine can restart only when the sequence is reversed.
Verrouillage mécanique
Isolation des énergies dangereuses
clé du personnel
Multi-person access
Comment cela fonctionne-t-il ?
Processus étape par étape
Autres considérations
Cette solution a permis de résoudre un problème pour un client spécifique. Fortress peut s'adapter à d'autres configurations et/ou à des options multigammes. Faites-nous part des détails de votre application afin que nous puissions concevoir une solution sur mesure pour répondre à vos besoins.
Gamme de produits recommandés
Why Mechanical Trapped Key?
In this application, a mechanical trapped key system based on the mGard range was chosen for a few reasons:
It enforces a sequence of events
While the key is removed, the energy source is prevented from being accidently turned on
It ensures that guards are closed before operations are allowed to resume
Another advantage of this solution is that by using mechanical interlocks it is possible to reach areas where wiring is impractical.
