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US 4,193,844 AGranted
Method of mounting filter elements and mounting therefor
AssigneeDelbag-Luftfilter GmbH
InventorsGerhard M. Neumann, Jochen Karelin
Life of this patent
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AssigneeDelbag-Luftfilter GmbH
InventorsGerhard M. Neumann, Jochen Karelin
Estimating the term…
A process for the insertion and exchange of the filter elements for suspended matter is performed from the clean-air-side. During the insertion of a filter element, a plastic tube (which encircles the circumference of the filter element and which exceeds in its length the layer thickness of the filter element several times) is tightly connected in its middle section with the side walls, which side walls form a border around the filter element; and then the open end of the plastic tube, which faces the frame, is connected by way of a tight fit with a ring, which is actually known and which surrounds the orifice of the frame into which the filter element is inserted. The filter element is connected with the frame by means of tightening devices, and the outer free end of the tube is turned inside out and around the filter element for the purpose of unhindered air passage through the filter layer, that during the exchange of the contaminated filter element, the outer open end of the tube is heat sealed. The filter element is disconnected and removed from the frame by flipping down of the tightening devices, and the tube is heat sealed in the section between the filter element and the frame, and, that during the insertion of a new filter element, a new tube is attached by way of tight fitting to the ring of the frame, which tube is at its middle section tightly connected with the filter element, and which tube is attached to the ring of the frame in an actually known way by overlapping of the heat-sealed tube rest. The tube rest is pulled onto the new tube and pulled off the ring, and the filter element is tightly connected with the frame by means of the tightening devices.
A device for changing a filter from the clean-air side and for sealing in the contaminants contained in an airborne particle filter in a nuclear installation comprising:
A frame for holding an airborne particle filter in a nuclear installation comprising a plurality of tightly connected rectangular frame parts, which frame parts consist of angle irons, and which frame parts are arranged in rows beside each other and on top of each other, which are equipped with elastic tightening devices, which can be swung away, and which serve to receive the filter elements and which are further equipped with a fluted test frame, which comes in contact with the gasket of the filter cell, characterized by the fact, that the frame (1) consists of a C-shaped angle iron, with outer leg (5), which is located parallel to the direction of flow, is equipped with openings, which serve to connect it with the adjacent frame, and which leg (6), which is located perpendicular to the direction of flow, is equipped at its inner circumferential edge with a conical tapered fluted test frame (22), which is pointed towards the inside, and which serves to receive the gasket (24) of the filter element (2), and which inner leg (7), which is located parallel to the direction of flow, forms a rectangular shaped opening for the filter element (2) and its outward bent extension (8) forms a concave curve, which is closed in itself, and which touches with its edge the corners of the frame opening (1), and which is encircled by an elastic ring (4), which elastic ring is equipped with two circumferential grooves (9,10), which circumferential grooves serve for the reception of a tube (28,29), which tube is made out of heat-sealable plastic and which tube exceeds in its length the thickness of the filter element (2) by a multiple of the thickness of the filter element and which tube (28,29) is connected in the area of its center with the side walls (25) of the filter element (2).
Dependencies are inferred from the claim text.