Fastening Apparatus for a Cleaning Device Based on Introducing High-Amplitude Pressure Waves

Abstract

A fastening device for a cleaning device by introducing pressure waves through a hollow nozzle into a boiler to be cleaned through an opening in the boiler wall has a housing body, which can be fastened to the boiler wall with the aid of a fastening flange on the boiler side, the hollow nozzle being concentric with the opening in the boiler wall and orthogonal to the boiler axis. Damping units are arranged at regular angular intervals around the hollow nozzle in the longitudinal direction thereof and are each fastened with one free end to the boiler-side fastening flange and with the respective other free end to the housing body. When the pressure waves are triggered, the housing body is resiliently retained in the longitudinal direction away from the boiler and brought back into the initial position.

1 . A fastening device for a cleaning device based on the introduction of high-amplitude pressure waves through a hollow cylindrical nozzle into a boiler to be cleaned through an opening in the boiler wall, wherein the fastening device comprises:
 fastening flange configured to fasten a housing body of the cleaning device to the boiler wall,   a series of damping units, which are arranged at regular angular intervals around the hollow cylindrical nozzle of the cleaning device in the longitudinal axis thereof and are each fastened with one free end to the boiler fastening flange and with the respective other free end to the housing body,   when the said high-amplitude pressure wave is triggered in the cleaning device, the housing body thereof is resiliently held back in the longitudinal direction away from the boiler and is brought back into the starting position by the damping units.   
     
     
         2 . The fastening device according to  claim 1 , wherein the series of damping units is arranged in a concentric manner along the longitudinal direction of the hollow cylindrical nozzle of the cleaning device which is concentric to the opening in the boiler wall and is orthogonal to the boiler axis. 
     
     
         3 . The fastening device according to  claim 1 , wherein the damping units comprise hydraulic dampers. 
     
     
         4 . The fastening device according to  claim 1 , wherein each damping unit has two tension or compression springs arranged in series in their longitudinal direction, which are inserted between the boiler-side fastening flange and a centre plate or between the centre plate and the damping plate, wherein the housing body is rigidly fastened to the centre plate by first longitudinal rods, wherein the damping plate is rigidly fastened to the fastening flange by second longitudinal rods, and wherein additional hydraulic dampers are provided between the damping plate and the centre plate in the longitudinal direction around the hollow cylindrical nozzle. 
     
     
         5 . The fastening device according to claim  5 , wherein the two tension or compression springs of each damping unit arranged in a row in their longitudinal direction are arranged around one of the second longitudinal rods and are supported on the centre plate directly or on bushes facing the tension or compression springs on this centre plate, while the associated second longitudinal rod is supported through an opening in the centre plate, while the associated second longitudinal rod is passed through an opening in the centre plate. 
     
     
         6 . The fastening device according to  claim 1 , wherein each damping unit has two groups of plurality of toroidal elastomers arranged in series in their longitudinal direction, which are interested between the boiler-side fastening flange and a centre plate or between the centre plate and the damping plate, wherein the housing body is rigidly fastened to the centre plate by first longitudinal rods, and wherein the damping plate is rigidly fastened to the fastening flange by second longitudinal rods. 
     
     
         7 . The fastening device according to claim  9 , wherein the closure housing has a guide tube in which the hollow cylindrical nozzle is freely guided. 
     
     
         8 . The fastening device according to claim  10 , wherein the guide tube is double-walled with an inner cavity which is provided helically from a feed point into the guide tube is pointing away from the boiler to the front edge of the guide tube, wherein the inner cavity can be supplied with a cooling fluid from a fluid source arranged outside the closure housing, and wherein the wall directed towards the boiler wall or the front edge of the guide tube have openings for an outlet of the cooling fluid. 
     
     
         9 . The fastening device according to claim  11 , wherein the guide tube is movable relative to the boiler wall flange in the longitudinal direction of the hollow cylindrical nozzle, and wherein the guide tube being at least partially retractable from the opening in the boiler wall in a rearward rest position. 
     
     
         10 . The fastening device according to  claim 9 , wherein a closure flap is provided in the interior of the closure housing, which closure flap comprises two to four closure wings, which are each pivotable about a bearing axis arranged tangentially transversely to the longitudinal axis, in order to be opened by pivoting against the inner walls of the closure housing when the hollow cylindrical nozzle is advanced through the front edge of the closure housing. 
     
     
         11 . The fastening device according to claim  13 , wherein the closure wings are double-walled with an inner cavity, wherein the inner cavity can be supplied with a cooling fluid from a fluid source arranged outside the closure housing and the wall of the closure wings directed towards the boiler wall has openings for an outlet of the cooling fluid. 
     
     
         12 . The fastening device according to  claim 1 , wherein the fastening device has a pivot axis arranged above the housing body, which is aligned transversely to the longitudinal axis of the hollow cylindrical nozzle, and on which the housing body is suspended via a pendulum arm. 
     
     
         13 . The fastening device according to claim  15 , wherein the pivot axis is fastened to a trolley which is displaceable in the longitudinal direction of this hollow cylindrical nozzle on a trolley profile provided above the hollow cylindrical nozzle. 
     
     
         14 . The fastening device according to  claim 1 , wherein each damping unit has a pneumatically or hydraulically controllable damping cylinder and a piston which can be extended from the latter. 
     
     
         15 . The fastening device according to  claim 7 , wherein the two groups of a plurality of toroidal elastomers of each damping unit arranged in a row in their longitudinal direction are arranged around one of the second longitudinal rods and are supported on the centre plate directly or on bushes facing the tension or compression springs on this centre plate, while the associated second longitudinal rod is supported through an opening in the centre plate, while the associated second longitudinal rod is passed through an opening in the centre plate. 
     
     
         16 . The fastening device according to  claim 1 , wherein the fastening flange on the boiler side is part of a closure housing which has a boiler wall flange which can be fixed to the boiler at the longitudinal end opposite the fastening flange.