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US 8,298,477 B2Granted
Lance holder
AssigneeBEDA Oxygentechnik Armaturen GmbH
InventorHorst K. Marmann
Life of this patent
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AssigneeBEDA Oxygentechnik Armaturen GmbH
InventorHorst K. Marmann
Estimating the term…
A lance holder characterized by a high degree of safety is equipped with a mounting or a pipe fixing, which safely prevents a rotation even of a bent lance pipe in the lance holder. The clamping head has a fixing part and a clamping part which ensure a punctiform fixation by way of displaceable pressure elements, particularly in the form of spheres. At least three such spheres are disposed across the circumference in a distributed manner, and ensure the safe fixation across a large tolerance range with regard to the dimensions of lance pipes. Said large tolerance region is further secured in that sealing sleeves having a larger inside diameter may be used, since the same are no longer deformed in the longitudinal direction in order to provide the seal, but instead are deformed in the radial direction. In summary the high degree of operational safety is also completed by the association of a chip and/or attachment of a nanocoating.
A lance holder for lance tubes which are particularly used in the iron and steel industry with a clamping head (3) which has a fixing part (4) and a clamping part (5) which can be moved on it, the clamping part (5) being assigned to a sealing sleeve (6) which can be influenced over the fixing part (4), which clamps and thus seals an introduced lance pipe, with a backburn safety device (7) and/or a non-return valve being located downstream, wherein the fixing part (4) is provided with a leading bevel (13) in which at least one pressure element, with at least two individual movable pressure elements (14) distributed around the circumference located at right angles to the longitudinal axis (16) of the lance tube (2) which can all simultaneously be influenced over a clamping part (5) having a pressure bevel (17), which are displaceable radially inwards.
Dependencies are inferred from the claim text.