Conveyors: power-driven – Conveyor frame or casing – Casing – cover – shield or load supporting surface
Patent
1993-12-28
1995-02-28
Bidwell, James R.
Conveyors: power-driven
Conveyor frame or casing
Casing, cover, shield or load supporting surface
198950, 114 73, B65G 2108
Patent
active
053929004
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a bulkhead door arrangement for sealingly closing an opening which is located between two mutually neighbouring spaces and through which an upper part and a lower part of a conveyor belt extend, said arrangement including a vertically moveable upper door part provided with a sealing strip on the side thereof facing the conveyor belt, a moveable lower door part which is placed between the two parts of the conveyor belt and separate sealing devices abut the side-edge surfaces of the conveyor belt in the closed position of said door parts.
A similar bulkhead door arrangement for seagoing vessels, or ships, is known to the art, by means of which a bulkhead opening through which a conveyor belt having an upper and a lower part extends can be closed in a water-tight fashion. This known door arrangement comprises moveable and stationary door parts which are mounted vertically and provided with sealing strips and which lie sealingly against the upper and the lower parts of the conveyor belt when the door is closed.
When the door of this known arrangement is closed, small triangular openings remain externally of the side edges of the conveyor belt, due to the fact that the sealing strips are not able to abut the edges of the belt, resulting in incomplete sealing of the bulkhead opening.
The object of the present invention is to provide a bulkhead door arrangement which will provide a complete seal when the door is closed.
This is achieved in accordance with the invention by means of a door arrangement of the aforesaid kind which is characterized in that the lower door part is vertically moveable; and in that the upper door part in its closed position presses the conveyor belt with a predetermined force against a sealing strip arranged in the bottom of the opening in such a manner that the upper door part controls the vertical movement of the lower door part.
According to one preferred embodiment, the upper door part functions, during the course of a door closing movement, to first press the upper part of the conveyor belt against an upper sealing strip on the lower door part and then press said upper part together with the lower door part down against the lower part of the conveyor belt until said lower part is brought into abutment with the sealing strip provided at the bottom of the door opening, with a predetermined abutment pressure. The sealing devices include upper and lower sealing elements which respectively abut the side-edge surfaces of the upper and the lower part of the belt.
The sealing devices are further vertically moveable and include sealing surfaces which, during closing of the bulkhead door, come into abutment with the various side-edge surfaces of the conveyor-belt parts, irrespective of the lateral positions of said side edges, that is within a given positional range.
The conveyor belt includes a part having side-edge surfaces which are inclined relative to a longitudinal vertical plane. Those elements of the sealing devices which coact with the side-edge surfaces of said part include a sealing surface which is inclined to a longitudinal vertical plane the same angle of inclination as the corresponding side-edge surfaces of said part and which have an extension which is greater than the width of the side-edge surface.
The conveyor belt also includes a part which has vertical side-edge surfaces, wherein those elements of the sealing devices which coact with the side-edge surfaces of this part are moveable both vertically and laterally and each includes a vertical sealing surface whose extension is greater than the width of the side-edge surface.
According to another preferred embodiment, the arrangement includes a device which acts on the lower sealing elements by virtue of its weight when the door arrangement is closed. When the door arrangement is open, the sealing elements are carried by the upper door part.
The invention will now be described in more detail with reference to an exemplifying bulkhead door arrangement illustrated schematically in the accompanyi
REFERENCES:
patent: 3288097 (1966-11-01), Boston
patent: 3601268 (1971-08-01), Head et al.
patent: 4491215 (1985-01-01), Meyer
patent: 4753337 (1988-06-01), Grosjean
Bidwell James R.
Consilium CMH Babcock AB
LandOfFree
Bulkhead door arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bulkhead door arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bulkhead door arrangement will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-842274