EP0341394A2 - Dispositif pour élargir une cheminée à revêtir intérieurement par fraisage, ainsi que des applications - Google Patents

Dispositif pour élargir une cheminée à revêtir intérieurement par fraisage, ainsi que des applications Download PDF

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Publication number
EP0341394A2
EP0341394A2 EP89104394A EP89104394A EP0341394A2 EP 0341394 A2 EP0341394 A2 EP 0341394A2 EP 89104394 A EP89104394 A EP 89104394A EP 89104394 A EP89104394 A EP 89104394A EP 0341394 A2 EP0341394 A2 EP 0341394A2
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EP
European Patent Office
Prior art keywords
milling
chimney
milling tool
fluid motor
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89104394A
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German (de)
English (en)
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EP0341394B1 (fr
EP0341394A3 (en
EP0341394B2 (fr
Inventor
Bernhard Dipl.-Ing. Foullois
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Friedrich Schiedel Kaminwerke GmbH
Original Assignee
Friedrich Schiedel Kaminwerke GmbH
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Application filed by Friedrich Schiedel Kaminwerke GmbH filed Critical Friedrich Schiedel Kaminwerke GmbH
Priority to AT89104394T priority Critical patent/ATE83305T1/de
Publication of EP0341394A2 publication Critical patent/EP0341394A2/fr
Publication of EP0341394A3 publication Critical patent/EP0341394A3/de
Priority to DD33864990A priority patent/DD297866A5/de
Publication of EP0341394B1 publication Critical patent/EP0341394B1/fr
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Publication of EP0341394B2 publication Critical patent/EP0341394B2/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/049—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes having self-contained propelling means for moving the cleaning devices along the pipes, i.e. self-propelled
    • B08B9/051—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes having self-contained propelling means for moving the cleaning devices along the pipes, i.e. self-propelled the cleaning devices having internal motors, e.g. turbines for powering cleaning tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
    • B28D1/181—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools using cutters loosely mounted on a turning tool support
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
    • F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
    • F23J3/026—Cleaning furnace tubes; Cleaning flues or chimneys cleaning the chimneys
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/45—Scale remover or preventor
    • Y10T29/4528—Scale remover or preventor with rotary head

Definitions

  • the invention relates to a device according to the features of the preamble of claim 1.
  • the invention further relates to a method according to the features of the preamble of claim 44.
  • the invention relates to applications of the method and device according to claims 48 to 51 .
  • FR-A 2 074 527 shows an example of cleaning flue gas pipes of a boiler system.
  • a cleaning brush is inserted into the boiler pipe to be cleaned together with a pneumatic motor driven by compressed air.
  • the device does not act as a milling device, but rather as a radial grinding machine (cf. also DE-A1 29 53 685 working with a washing brush).
  • a new flue gas-carrying inner pipe string must be drawn into the chimney in need of renovation (so-called lining), in certain cases with an additional radial distance outside of this inner pipe string to be pulled in, be it because of the need to pull in a thermal insulation layer together with this, be it for Arrangement of another space, for example for ventilation purposes.
  • the new flue gas-carrying inner pipe string must each have a predefined inner and thus also an order of magnitude predefined outer diameter, so that, as a rule, pulling in the new inner pipe string used for refurbishment into the existing clear width of the chimney in need of renovation is out of the question. It is therefore necessary in all of these cases to remove at least the inner shell of the chimney in need of renovation prior to the installation of renovation pipe elements.
  • the materials of the inner pipes of existing chimneys and also of the rehabilitation layers to be included are very different and almost always very resistant.
  • Older chimneys made of natural or artificial stones, e.g. certain bricks, bricked up or in single-shell moldings made of concrete, in particular made of heat-insulating concrete.
  • the flue gas-carrying inner pipes often consist of chamottes of different grades up to glass, ceramic and stainless steel pipes.
  • the inner pipe lining was also formed from elements in the manner of ceramic tiles.
  • chimneys are often placed in sections on floor slab openings, so that, for example, actual building material in the floor slab area, such as concrete from floors or ceilings of rooms and reinforcing elements embedded therein, including reinforcing irons, reach into the clear cross section of the flue gas pipe and often even there Form cross-sectional constrictions. Corresponding cross-sectional constrictions are often found even if mortar work was carried out improperly when moving the original chimney.
  • the invention is based on AT-A 203 707, in which, in addition to the use of grinding or beater tools, milling tools have also already been considered.
  • the grinding or milling tool in question can be moved up and down in this known device together with its drive motor in the clear cross section of the chimney.
  • the invention prefers the use of actual milling tools. Insofar as milling tools are mentioned, they can also be replaced, in particular for special applications or additional work steps, by drilling or grinding tools which are included in the term cutting tools.
  • This previously known device differs from further-standing devices in which the drive motor is arranged outside the chimney and its torque is transmitted to the inside of the chimney via a possibly flexible shaft (cf. DE-A 1 229 230, WO 86/00391 of WIPO ).
  • the drive can be installed on the roof, whereby a greater range than about 10 m can only be achieved by further coupling of flexible extension shafts in the event of loss of power.
  • starting the drive motor has only proven possible if the shaft end piece is removed from the chimney with tools.
  • the flexible shaft and the tool therefore move outdoors and pose a great danger to the operator (s).
  • the shafts, together with their connecting couplings wear out quickly and also tend to break suddenly. Their handling is generally problematic. Use in chimneys that are not axially rectilinear is only possible to a very limited extent.
  • an electric motor drive is provided in AT-A 203 707.
  • the stator of the electric motor also serves as a guide for the motor on the inside wall of the chimney.
  • the outlay in terms of equipment and the associated minimum diameter of the device are so great that they do not appear to be suitable for drilling out chimneys with nominal diameters of less than 150 mm. It certainly does not seem possible to pass such a device through the clear cross-section of a chimney of this nominal diameter, which is additionally provided with internal deposits, in order to then mill from bottom to top.
  • electromotive drives do not appear to be suitable at all for insertion into a chimney.
  • the risk of explosion in soot that is separated if there is a spark the risk of electrical short-circuits in conductive areas of the inside wall of the chimney (e.g. protruding metal reinforcements or as a result Sooting due to areas that have become conductive), fire risk due to overheating due to insufficient ventilation while avoiding the additional space required by liquid cooling, risk of accidents for the operators, large working weight, rare availability of high-voltage electricity at the place of work and the like.
  • the invention has for its object to provide a device for milling a chimney to be lined, which is safe, convenient and universally applicable while retaining the advantages of the known device, and a compact, visual inspection of the work site construction of the milling tool permitted from above.
  • the fluid motor used in the device according to the invention can be operated, for example, with oil or with compressed air. If compressed air or another pneumatic gas is used, for example an inert gas such as nitrogen, there is no danger to the chimney from the outset. Pressure oils are expediently chosen in a non-inflammable manner. If such pressure oil escapes in a sooty chimney, it could even lead to the liquid binding of the soot and thus to a reduction in the original soot fire risk. In addition, fluid lines are less likely to get caught on projections and joints on the inner surface of a chimney to be milled out than electric lines.
  • Small diameters and small axial designs can be combined conveniently into an overall compact design, especially with fluid motors. This has a whole range of advantages, such as light weight and thus easy accessibility even at very large working depths, even with chimneys with a round inner cross-section, sufficient visual insight into the working location of the milling tool from above, and easy maneuverability along uneven working paths.
  • Fluid motors also do not require cooling to prevent the motor from overheating.
  • the internal structure is technically simple and at the same time robust. There is therefore no risk if the fluid motor strikes the inner wall surface of the chimney even at greater working depths. Even a design that is safe against damage when falling from a great height can be easily constructed.
  • the operating elements are protected against the dust generated during milling with simple means, e.g. a simple housing that can be shielded, especially since the elements of a fluid motor show from the outset a narrow, elongated design that is affinity to the chimney.
  • An oil pressure pump which provides the operating fluid from outside the chimney, or in the case of a pneumatic pump of a compressor, can be driven at any work location simply by means of an internal combustion engine, for example a modern low-noise diesel engine, without the need for a high-voltage connection.
  • the device according to the invention is not limited to the applicability in these problem cases because of its universal applicability, but the same fluid motor can be used for all applications with a respectively adapted milling tool, ie even a fluid motor of very small diameter with chimneys of maximum width.
  • the device according to the invention can be used both for milling out flue gas-carrying inner tubes with a round clear cross section and for those with non-round, for example approximately rectangular or square, cross sections.
  • the end cross-section is round due to the rotating working of the milling tool, with non-circular cross-sections initially only partially hollowing out the cross-section in the smallest diameter areas.
  • Drilling or grinding devices can also be used interchangeably on the same fluid motor, e.g. to Preparatory work on the chimney, such as enlarging the chimney valve and leveling the chimney head plateaus. It is also not excluded to use the fluid motor according to the invention e.g. to be used for lower quality requirements or for the use of existing drilling or grinding tools.
  • pressurized oil as the operating fluid is known to offer the advantage of being able to work with rod-like and relatively delay-free working with relatively large working pressures.
  • pressurized oil as the operating fluid is known to offer the advantage of being able to work with rod-like and relatively delay-free working with relatively large working pressures.
  • an operation with compressed air or the like can be regulated very simply and continuously from the outside of the chimney by changing the pressure of the compressed air via a control valve, for example directly on the compressor, but also at the location of the worker on the chimney, e.g. on the roof. Because of the compressibility of a pneumatic pressure fluid, the milling tool also runs gently against any resistances, so that even from the operating mode, the milling tool will hardly ever seize in the chimney.
  • the exhaust air (atmospheric air or other pneumatic pressure fluid) can be led out of the chimney via a separate outlet line.
  • the exhaust air is allowed to escape directly into the flue gas duct of the chimney. This creates an air cushion with a slight overpressure in this area. It has been shown that the dust formed during the milling process, which, in contrast to larger-sized milling lift - which has the tendency to fall down under the force of gravity from the outset - has the tendency to rise upwards, has a flow direction for downward flow receives. This has a double advantage.
  • the dust formed can flow downwards in a simple manner without or only with a low suction power; the suction power of a suction device arranged at the lower end of the chimney can also be kept small.
  • the possibility of a geometrical optical cross-section of the view from above past the fluid motor in the direction of the working place of the tool can be made fully usable for the operator, since the space above the milling tool or the air cushion mentioned remains free of dust.
  • a pleasant side effect is that the operators are not soiled by dust.
  • the exhaust air outlet is even directed downward onto the milling tool arranged below the fluid motor, it can be continuously cooled and kept free of undesired deposits. You can even do without an air dryer in the open pneumatic circuit; because it has been found that moisture in the compressed air is even favorable for binding fine dust.
  • the unit of fluid motor and milling tool is preferably suspended from a pure tension element, as is known per se from AT-A 203 707.
  • the fluid hose itself can serve as the pulling element, which must then be suitably equipped to be load-bearing.
  • a separate traction element such as a traction cable actuated by a winch, for example made of steel, is possible.
  • the suspension chain used in AT-A 203 707 can easily be replaced by such a pulling cable because of the lower weight of the fluid motor according to the invention.
  • guide elements for the fluid motor in the chimney are expediently arranged only locally around the fluid motor.
  • the guide elements under consideration in AT-A 203 707 are each designed to be closed in a ring.
  • Claim 7 provides a first possibility for this. It is essential that the runners can be adjusted by changing the inside diameter of the chimney.
  • the runners which can be slightly curved like sled runners in their central area and can be bent up at their ends - also for maneuverability both upwards and downwards - ensure low-friction sliding even if the inside wall of the chimney is not uniform, without the risk of getting caught too often.
  • the pressure fluid which is also used as the operating means of the fluid motor, but is expediently supplied via a separate control line and outside the chimney, e.g. at the top of the chimney.
  • the control line and the pressure fluid line are connected to form a line part, for example by binding together using fastening tapes distributed over the length, in particular adhesive strips.
  • the fluid motor according to the invention even seeks its own way along the axis of the chimney to be milled out, without the need for positive guidance.
  • you can adjust the spring preload e.g. Claim 13 allows pressure fluid, e.g. from outside the chimney. Control compressed air.
  • Fluid motors in particular pneumatic motors, can in principle achieve very high speeds, even in transition areas from milling to grinding (20,000 rpm and more). Without gear reduction, however, only relatively crumbly materials can be milled off. As a secondary function, however, the fluid motor according to the invention can then also be used for the finishing of an already milled chimney by exchanging the milling tool for a grinding tool.
  • the design of the fluid motor provided in the device according to the invention is suitable for not only being carried along with the milling tool in an already milled-out area of the chimney, as is usually the case with milling from top to bottom, but instead also in order first to be guided downwards together with the milling tool through an area of the chimney which is still to be milled out, in order then to carry out the milling upwards (cf. claim 17). It is known per se to connect milling tools of devices for milling a chimney to be lined with a drive motor arranged above the milling tool via a flexible shaft and to close the chimney cross-section with the milling tool moving up and down expand (preamble of claim 1 of DE-A 12 29 230).
  • Such a milling process can be carried out in one step from bottom to top (see, for example, WO 86/00391 of WIPO) or in multiple steps with milling in layers, possibly with finishing finishing.
  • the device according to the invention is suitable for all possible working methods upwards and downwards as well as in one stage and in multiple stages.
  • Claims 18 to 21, 22 and 25 to 30 relate to three different types of milling heads, which appear to be particularly suitable in connection with the invention, but moreover can also be used generally when milling chimneys by means of different types of devices and, in so far, have a second use .
  • the first-mentioned type of milling head is used with a relatively large lamella width from the outside in during normal milling of the chimney, while embodiments with lamellae thinner from the outside in are particularly suitable for reworking or finishing.
  • the second type of milling tool is suitable for rough clearing work. It differs from normal chain grinding heads in that the chain links are milled with milling elements. Claim 23 addresses a flying chain reduced to the minimum.
  • milling heads of this type can also be used in other applications of a more conventional type, such as shaped stones, some natural stones and in particular also initial renovation layers formed from slurry concrete. Because the swivel arms on which the milling heads are seated can be swiveled out, a cone-like adaptation to the direction of progress of the milling process also takes place.
  • all the milling tools in question and in particular the preferred three types mentioned above can also be designed such that the same milling tool can easily be converted from one orientation for milling from top to bottom into a milling from bottom to top, or vice versa, by repositioning.
  • a reversible milling tool requires retrofitting after every working stroke.
  • a double-acting design of the milling tool is recommended, so that it is designed to be both upward and downward milling.
  • the most favorable is a double-acting geometry of the milling tool. This can be easily implemented in the preferred first and second types (with lamellae or chains) of the milling tool discussed above. If the working edge of the milling tool lies on a knitting cone, this is expediently arranged in tandem in such a way that the large surfaces of the knitting cone face each other.
  • milling tools are preferred in which such an arrangement is not possible.
  • This also applies in particular to the preferred third design mentioned above (swiveling milling heads set with burrs).
  • the design according to claim 35 is then recommended. Thereafter, the effectiveness of the working direction of the milling tool in question can be changed in one direction at the end of the working stroke, without disassembling and reassembling the milling tool to have to.
  • Such a changeover can again be carried out, for example, by means of the operating fluid, in particular pneumatically, by having a separate changeover line to the operator's workplace person outside the chimney.
  • This reversing line can also be combined with the fluid hose to form a unit.
  • all that is required is to release the swivel limitation of the swivel arms, to fold the swivel arms in the other axis direction and to limit their swivel angle in this orientation.
  • the fluid motor be positively driven, e.g. double-acting, e.g. in the sense of claim 6 leading upwards and downwards to train what has already been discussed as a possibility in connection with the skid guidance according to claims 7 to 9.
  • the guide elements according to claims 9 to 11 can be arranged according to claim 37 double-acting. If these guide means are only required in one direction, the resilient guide elements can easily be arranged in the same direction.
  • the milling tools with hammer mechanism according to claims 38 to 41 have already been mentioned above in connection with an increase in the milling effect.
  • they offer the advantage of being able to dispense predominantly and in particular entirely with no torque support, since the milling element bounces back like a hammer on an anvil at its place of work and a compensation of the counter-torque occurs.
  • the measure according to claim 42 can also be provided to compensate for a counter torque.
  • Claim 43 specifies a measure for quickly changing various milling tools in order not to impair the very high working speed possible within the scope of the invention due to set-up dead times.
  • the device according to the invention enables operating modes which have not been considered at all so far.
  • the preamble of claim 44 is based on the cited preamble of claim 1 of DE-A 12 29 230 or WO 86/00391 of WIPO .
  • the method according to the invention is generally formulated based on drive motors and can in particular be implemented according to the invention. Since implementation with other drive motors has so far not become known, but it cannot be ruled out in principle, the generalized formulation was chosen.
  • single-family houses generally have chimney heights from the basement floor to the upper chimney mouth in the range of 8 to 12 m height.
  • Three-storey houses start at a height of 16 to 17 m from the basement level.
  • Eight-storey houses for example, have a corresponding height of around 48 to 50 m. All such heights from three-storey dwellings upwards can be easily milled with the device according to the invention in one go with the torque remaining the same, with basically no height restriction due to the very low weight and great flexibility. Should one want to work from the side of a chimney, this is also easily possible because of the simple construction of the device according to the invention.
  • the length of the pressure fluid hose there is practically no limit to the length of the pressure fluid hose, so that it is also possible to mill far from the location of a pressure oil pump or a compressor. As a rule, the latter can therefore always be set up next to the building whose chimney is to be renovated.
  • Fig. 1 shows a schematic representation of a "cut" house with a chimney also shown in section.
  • a compressor 10 parked on the floor is connected to a fluid motor 12 which is drained off in the chimney and is designed as a pneumatic motor via a fluid hose 14 which supplies compressed air.
  • the fluid motor carries a milling tool 16, which here is formed by chains, e.g. however, it can also be formed by a suitably designed milling crown.
  • the milling tool 16 When the fluid motor 12 is pressurized with the compressed air, the milling tool 16 is set in rotation and thereby mills the chimney to the desired diameter, also with removal of sooting in the inner shell of the chimney and with the removal of protruding wall parts.
  • the chimney is continuously milled from bottom to top by slowly pulling up the fluid motor 12 together with the milling tool 16.
  • Working from top to bottom is also possible, e.g. with the milling crown mentioned.
  • a suction device is introduced, through which the dust that is formed is suctioned off.
  • a pressure oil pump 10 can replace the compressor 10 and the pneumatic motor and a hydraulic motor as the fluid motor 12.
  • a chimney 4 here as a house chimney, is erected on a chimney foundation 2 and has an outer chimney construction 6 running all around and an inner shell surrounded by it, which is provided as an inner pipe string 8 carrying flue gas.
  • the load-bearing chimney structure 6 is shown here as masonry made of artificial or natural stones and the inner pipe string 8 as a continuous layer, for example made of centrifugal cement.
  • the inner pipe string can also consist of fireclay or steel pipes and can also consist in the usual manner of axially adjoining and mostly sealed by grout or other sealing strands.
  • a chimney valve 18 In the area of the lower end of the chimney 4 above the chimney foundation 2 there is an opening with a chimney valve 18 through which soot is usually removed.
  • the chimney 2 ends at the top in a frontal plateau 20, on which a chimney head, not shown, can be placed on the building in the case of more modern chimneys, possibly via a cover plate, not shown.
  • the chimney 4 is expediently milled out with the chimney head removed and, if appropriate, also with the end plate removed.
  • a support frame or support frame 22 is mounted so that it is immovable laterally, for example by Clinging on the upper outer chimney edge.
  • the supporting frame 22 carries a roller 24, via which the fluid hose 14 in the arrangement according to FIG. 1 and a pull rope in the arrangement according to FIGS. 2 to 4 26 is performed.
  • the fluid motor 12 is suspended here on this traction rope 26, for which purpose the fluid hose 14 itself serves as shown in FIG. 1. If this fluid hose 14 itself is to take over the traction function, it must be designed to be suitably tensile, for example by a tensile hose reinforcement or hose casing.
  • the cable winch 28 or a hose unwinding roller are rigidly attached to the supporting structure with their shaft during operation, so that the winding forces are absorbed via the supporting structure at the upper end of the chimney 4.
  • the cable winch 28 is expediently adjustable in height.
  • the fluid hose 14 is here guided separately from the pull cable 26 from the upper end of the chimney 4 and connected to a compressor (cf. compressor 10 in FIG. 1) outside the chimney, which is driven by an internal combustion engine, expediently a diesel engine. Both the compressor and the internal combustion engine are mounted on a chassis 30 with a parking brake 32 and surrounded by a sound absorbing hood 34.
  • the chassis 30 can be on any flat ground Surface 36 next to the building in which the chimney 4 is built, set up and braked against this base.
  • a pre-separator 42 for coarse milling removal and a main separator 44 for milling dust communicating therewith in the suction direction, which is also driven by a motor, are also arranged on chassis 38 and 40.
  • a pre-separator 42 for coarse milling removal and a main separator 44 for milling dust communicating therewith in the suction direction which is also driven by a motor
  • chassis 38 and 40 are also arranged on chassis 38 and 40.
  • about two electric motors 46 or, alternatively, compressed air motors can be provided, which can then expediently be supplied by the compressor arranged under the hood 34.
  • the two electric motors 46 enable a corresponding multiplication of the available drive power when supplied by the local mains voltage and can thus save a high-voltage connection. If necessary, more than two such motors 46 can also be provided.
  • the main separator is designed, for example, as an industrial vacuum cleaner and is connected via the suction lines shown through the opening of the chimney slide 18 to the floor space of the chimney 4 above the chimney foundation 2.
  • the milling tool 16 shown in FIG. 2 is described in more detail below with reference to FIG. 14.
  • the milling tool 16 used in FIGS. 3 and 4 is described in more detail below with reference to FIG. 15.
  • the fluid motor 12 also carries a guide 48, as is described in more detail with reference to FIGS. 9 and 10a to 10d.
  • the fluid motor 12 itself has the type described below with reference to FIG. 5, possibly with FIG. 6, which requires guidance.
  • the guide 48 is omitted with the basic structure according to FIGS. 2 to 4 remaining the same.
  • the inner pipe string 8 carrying the flue gas is milled out in one go from bottom to top, in the arrangement according to FIG. 4 likewise in one go from top to bottom.
  • the inner layer 8 interpreted here as the inner tube strand 8 could also comprise only one inner zone detected during the milling process, wherein radially successive zones can be removed downwards, upwards, downwards, etc., in turn, from inside to outside in an alternating milling operation.
  • Post-processing steps, such as finishing operations, can also be carried out by changing the milling tool 16 by means of the same fluid motor 12.
  • the milling tool 16 can optionally also be arranged at the top and the fluid motor 12 at the bottom in a manner not shown; however, this presents the difficulty of having to direct the fluid motor through the body of the milling tool when it is supplied from above or, alternatively, of supplying the fluid hose 14 from the beginning through the opening of the chimney slide 18, or another opening.
  • the pneumatic motor 12 shown in FIG. 5 has a cylinder 50, along the axis of which the rotor 52 of the pneumatic motor 12 extends.
  • the cylinder 50 is delimited on the outside and inside by a cylinder surface, but the inner cylinder surface is arranged eccentrically to the outer cylinder surface.
  • the cylinder 50 has a correspondingly changing wall thickness.
  • the rotor 52 has a cylindrical outer surface which, with the eccentric inner surface of the cylinder 50, delimits a compression space 54 (shown in cross-hatching).
  • the rotor 52 is in turn attached to a rotor shaft 56.
  • Slits extending tangentially to the rotor shaft 56 are distributed over the circumference of the rotor 52, which is formed from a solid cylinder shell, and extend over the entire axial length of the rotor 52 and end at a radial distance from the rotor shaft 56. In practical embodiments, between four and six such slots are provided, for example. Rotor blades are loosely inserted in the slots. While the fluid motor 12 can otherwise be made of steel, the rotor blades 60 can be made of a suitable plastic, for example of phenoplasts or melanin resins, such as those sold under the protected trade name "Pertinax".
  • the rotor blades 60 are rectilinear on their longitudinal edge interacting with the cylindrical inner surface of the cylinder 50 and complementary on their longitudinal edge engaging in the slots Basic training of the slots is flattened to be axially guided in the slots in their radially lowest engagement position.
  • the rotor shaft rotates under the centrifugal force, the rotor lamellae are pressed outwards into contact with the inner wall surface of the cylinder 50. They divide the compression space 54 into wandering chambers distributed over the circumference of the rotor shaft, short-circuit air between the chambers being avoided as far as possible by sufficiently close contact of the slots on the rotor lamellae.
  • two continuous axially parallel bores 62 run alongside one another in the circumferential direction, via which the compressed air supplied by the compressor 10 via a compressed air hose 14 is fed to the compression space 54 via four slots 64.
  • the slots 64 extend in the circumferential direction of the cylinder 50 and are arranged in pairs in the vicinity of the two ends of the cylinder.
  • Radially through outlet holes 66 are distributed in the sickle of the tapering wall thickness of the cylinder, decreasing in the direction of rotation of the cylinder 52, and several, for example five, of these holes are expediently arranged in several, for example two, rows across the axial area between the slots 64 Distributed circumference of the cylinder 50.
  • the cylinder 50 is sealed off at both ends by a cover 68.
  • Each cover 68 carries on its side facing away from the compression space 54 a ball bearing 71 for the rotor shaft 56, which extends through axial openings in both covers 68 and is secured against axial displacement.
  • the rotor shaft 56 is extended beyond the ball bearing 71 as an input shaft of a single-stage reduction gear, here a planetary gear.
  • the planetary gear corresponds to the lower half of the exposure drawing according to FIG. 6, in the upper half of which further elements for the two-stage design of the reduction gear are shown, here an axially connected two-stage planetary gear.
  • a pinion 70 is seated on the driven end of the rotor shaft outside of the cylinder 50.
  • This pinion engages in an internal toothing of a planet gear cage 72.
  • the planet gears 74 supported in this mesh with a sun gear ring 76.
  • This is rigid on the inside of a pot-shaped extension 78 of an output shaft 80 , on which the shaft of the milling tool 16 is coupled in a rotationally fixed manner.
  • a second planetary gear stage is arranged axially between the output shaft 80 and the described first stage of the planetary gear, the elements of which in FIG. 6 are identified by the addition a while the functional parts are otherwise the same.
  • first stage of the planetary gear is not connected directly to the output shaft 80, but that, with the same design as the end of the output shaft facing the pneumatic motor, an axially aligned intermediate shaft 82 is used, on which a pinion 70a sits, which corresponds to the pinion 70 at the input of the first gear stage in the force application function.
  • the entire unit which is described by the cylinder 50 together with covers 68, the rotor shaft 56 mounted therein and the planetary gear (84) (designated as a whole) with 84 (second stage 84a), is surrounded by a two-part solid armored housing 84 on its side facing the suspension and all around , wherein a solid lower end plate 86, which carries a first ball bearing 88 for the output shaft 80 on the inside and is connected tightly to the armor housing 84, closes the housing on the side facing the milling tool 16.
  • the output shaft 80 is also supported by a second ball bearing 90 which is fastened to the inside of a first part 92 of the tank housing.
  • This first part 92 is arranged in the form of a hood and, starting from the end plate 86, comprises all of the above-mentioned parts of the output housing (s) and pneumatic motor, the hood base 94 being opposite the free end 96 of the rotor shaft 56 opposite the output shaft 80.
  • the cylinder 56 is provided with a slightly protruding ring flange at each of its two ends, and these ring flanges are tightly fitted into the housing of the first part 92 of the armored housing 84. This creates a certain annular gap between the outer surface of the cylinder 50, the two ring flanges and the inner surface of said first part 92, through which the exhaust air from the compression space 54 emerging from the outlet holes 66 can be freely distributed. This exhaust air can escape radially further outward through a ring of outlet holes distributed over the wall of the first part 92 in the circumferential direction.
  • the compressed air is fed to the pneumatic motor through an inlet connection 100 projecting axially upwards, which is integrally formed in the hood base 94. From there, the compressed air reaches the bores 62 via the free space 102 formed below the hood base 94 within the first part 92 and from there finally into the compression space 54 in the manner described.
  • the second part 104 is screwed around the outside on the side of the suspension of the fluid motor. As will be described later with reference to FIG. 9, the entire unit of fluid motor 12 and milling tool 16 is suspended on this second part 104.
  • the second part 104 encompasses the first part 92 of the armor housing 84 to below the exit holes 98 and is screwed into a recess on the first part such that both parts 92 and 104 of the armor housing 84 have a common, small-diameter cylindrical outer surface.
  • annular gap 106 is formed in the overlapping area between the two parts 92 and 104 of the armor housing 84, which lies opposite the exit holes 98 and is sealed in the region of the joint between the two parts of the armor housing.
  • the annular space 106 is extended radially inward in relation to the outer end face of the hood base 94 by an annular gap 108 between the outer end face of the hood base 94 and a massive continuation part 110 of the second part 104 that leads axially upward.
  • a radial bore 112 is first formed, which extends outside the armor housing with an inlet extending axially next to it connect to the connection with the compressed air hose 14 leads. This connection hole 112 is sealed off from the outer end of the inlet connector 100 on the hood base 94.
  • the annular gap 108 communicates with axially and radially running bores 114 and 116 in the continuation part 110 of the second part 104 of the armored housing 84, in order to finally exhaust the air from the pneumatic motor through an exhaust shaft 114 attached to the side of the armored housing, and during milling to escape into the interior of the chimney.
  • the exit direction of this exhaust shaft is chosen axially parallel to the milling tool 16.
  • the exhaust air escaping only over a portion of the circumference of the armor housing is distributed as a jacket flow in such a way that not only blowing on the milling tool is possible, but also a lock against the rising of milling dust over the entire circumference of the armor housing.
  • the pneumatic motor according to FIG. 7 can basically be constructed in the same way, without prejudice to the graphic deviations in FIG. 7.
  • the torque is transmitted from the pneumatic motor to the milling tool in the absence of a reduction gear in a ratio of 1: 1, i.e. directly.
  • the free end of the rotor shaft 56 protruding from the cylinder 56 on the milling tool 16 side is connected to an output shaft 115, which corresponds to the output shaft 80 according to FIG. 5, via a striking mechanism 116.
  • This converts the continuous rotary movement of the rotor shaft 56 into a rotary impact movement with impact action in the angular direction due to one per revolution of the Rotor shaft effective interaction of a so-called hammer and a so-called anvil of the striking tool.
  • An axial oscillation of the milling tool 116 can be dispensed with entirely if an axial component could also be included if necessary.
  • An essential feature of switching on such a striking mechanism is to compensate a counter torque occurring when the milling tool 16 is working - an elastic hammer blow between the hammer and anvil of the striking mechanism per revolution - by the impact of the impact in the striking mechanism.
  • the output shaft 115 is hollow, with a polygonal internal cross section, in particular as a hexagon. This allows marketable Milling tools, which are generally provided with a hexagon connection, can be simply plugged in while transferring very high torques.
  • a corresponding plug-in piece 118 of a milling tool 16 is shown in FIG. 7.
  • the bore of the hollow output shaft 115 can also be used as a supply channel for control fluid, in particular compressed air, for the milling tool.
  • a control line connection 120 is led out at the milling end of the hollow shaft, for example in order to change over a milling tool which can be reversed for working directions upwards and downwards when the working direction changes.
  • FIG. 8 and 9 to 11 show two possible preferred construction types of positive guides which can be used in the construction of a pneumatic motor according to FIG. 6 which requires torque support. Both types are characterized by a relatively little covered viewing gap between the tank housing 84 and the inner surface of the chimney 4.
  • connection coupling 124 here a so-called socket, for connecting the output shaft 80 according to FIG. 5 to the milling tool 16.
  • an eyelet 122 is provided at the upper end on the second part 104 of the tank housing, on which the Pull rope 26 can be latched.
  • connection piece 126 which is arranged here laterally on the tank housing and communicates with the connection bore 112, on the fluid motor analogously to the eyelet 122 in a manner not shown and train to transmit tensile force, ie with connection means to the reinforcement or tensile casing of the fluid hose 14.
  • a holding disk 128 is arranged in the region of both ends of the armor housing 84 with sufficient axial spacing for the guide (see in particular also FIGS. 10a and 1b, in which the holding disk 128 in plan view and in Side view is shown).
  • the retaining disk is clamped onto the outer circumference of the armored housing 84 along the action line 130 shown in dashed lines in FIG. 10a by means of tensioning screws 132.
  • the dashed double line 134 in FIG. 10 a describes, in the large square cross section of the holding disks 128 in the area of the center of the boundary lines of the square, an articulation axis 134 for swivel arms 136.
  • These are straight levers, one end of which in the area of the axis 134 on a pivot pin 138 on the armored housing 84 is articulated and the other end is articulated to a cheek 140 on the radially inner side of a runner 142.
  • four runners 142 are distributed over the circumference of the pneumatic motor. These have an elongated, at least approximately rectilinear central section 144 and ends 146 which are inwardly curved or inclined at the top and bottom.
  • the outer surface of the armor housing 84, the runners and the two swivel arms articulating the respective runners above and below form a parallel guide linkage.
  • All four parallel guide rods are radial in their axially displaceable actuating plate 147 Width adjusted together.
  • the circumference of the actuating plate in the region of a linkage 148 is connected to a linkage 152 in the central region of the respective upper swivel arm 136 via a tension lever 150 which extends along the outside of the tank housing.
  • the actuating plate 147 is axially displaceably guided on two diagonally opposite guide rods 154.
  • the guide rods in turn are screwed with their lower ends into the upper holding disk 128 and connected at their upper ends by a transverse yoke 156 to which the eyelet 122 is welded.
  • the actuating plate 147 lies in its lowest position due to the weight of the rods with runners articulated on it.
  • a pneumatically actuated servo cylinder 158 is used to lift the actuating plate 147, which is attached to the front of the armor housing 84 and can be loosely supported with its punch 160 at the axial center of the actuating plate.
  • a fastening 162 at the point of attack on the actuating plate 147 is preferred.
  • the holding disk 128 is bevelled at the corners of its large square floor plan, and in each of the corners a radially extending incision 163 is provided, which in the area of the line of action 130 for tightening on the circumference of the Armor housing as well as in the embodiment described above is designed as a continuous slot.
  • the free lever end is designed with a one-sided projection as fork 169, a shaft 172 being rotatably mounted on both arms 170 of fork 169, on each of which a cutting wheel 174 or alternatively a roller or roller is rotatably mounted.
  • An elastic-flexible buffer element in the form of a circumferential cellular rubber ring 176 is secured against the axial displacement in each case under the respective holding disk 128, on which the central region of the respective lever lies loosely to limit its downward pivoting position. If necessary, the axial position of this buffer element 176 can also be adjusted. With a suitable setting, it is also possible to choose the same or desired different radial exposure (for example in adaptation to the conical shape of the chimney) with different lengths of the levers 164. In this sense, the upper levers 164 are drawn with a shorter length than the lower levers 164. The somewhat further radial projection of the lower levers 164, which can also be seen in FIG.
  • a notch 178 can be seen in FIG. 9 on the outer circumference of the armored cylinder. This notch 178 is opposite a parallel corresponding notch on the covered other side. As a result, the two parts 92 and 104 of the armored housing 86 can be screwed on by means of a tool with the application of a sufficient torque.
  • the guide rods 154 of the embodiment according to FIG. 8 are replaced here by a connecting pin 180 which is fixed at the top by the eyelet 122 and is rigidly connected at the bottom to the end face of the armored housing 84.
  • the connecting pin 180 a solid cylinder, with a smaller diameter than the armor housing 84 can be seen.
  • This has the advantage of being able to arrange the upper levers 164 with a particularly small radial projection. Because of the greater load on the lower levers, the problem does not arise to such an extent. All in all, this has the possibility of adapting to particularly small clear chimney widths.
  • Fig. 11 shows a simple modification with which the same structure of the guide can be formed double-acting, with a constant geometry without the need for conversion work.
  • the levers which are arranged in the form of a ring at the top and bottom, are connected to one another by tension elements 182 which extend along the armored housing 84 and which are expediently tension springs.
  • tension elements 182 which extend along the armored housing 84 and which are expediently tension springs.
  • the lower buffer element 176 is entirely unnecessary.
  • the pulling elements 182 are provided releasably.
  • the armored housing 84 of the fluid motor 12 is only shown in a rough schematic.
  • the aim is to center this armored housing on the respective inner wall layer 184 of the chimney 4.
  • this inner wall layer can be formed by a zone of the chimney that has already been milled or still to be milled, in particular, in the case of single-stage milling, of the supporting chimney structure 6 or the inner pipe 8 carrying flue gas.
  • At least three, preferably four, arc springs 186 are distributed over the circumference of the armor housing 84. These are fastened at their lower end to the fastening point 188 on the armor housing 84 and engage at their upper end in an axial guide 190, which is also attached to the outer circumference of the armor housing 84.
  • the arc spring 186 need only be in contact with the inside of the chimney in a relatively small axial area.
  • the large axial engagement length shown, which takes up the predominant length of the arc spring, is preferred. Since no forces are to be transmitted here, the main advantage lies in the use of the same bow spring for chimneys 4 of very different widths.
  • the milling tool has a central support body 192, around which milling-effective elements held by the support body extend.
  • the upper end of the support body is shown here as a square, with hexagons instead being provided in the case of a design which complies with the standards.
  • These are rigidly attached to the output shaft of the respective fluid motor 12 in axial alignment with its effective axis via fastening pins 194 which engage in corresponding fastening bores in the support body 192.
  • fastening pins 194 which engage in corresponding fastening bores in the support body 192.
  • the support body 192 extends with a constant cross section over the entire axial height of the milling element.
  • the lower end is formed as a support 196 which is fastened axially immovably to the support body 192 via a fastening pin 194.
  • spacer sleeves 198 and spacers 200 are loosely attached to the support body.
  • the spacer disks 200 are preferably arranged equidistantly, in which case the spacer sleeves 198 arranged between them each have the same axial length or can each be of the same design.
  • the lowest spacer sleeve 198 can be made shorter, as shown. Alternatively, you can do without them entirely and place the lowest spacer directly on the support 196.
  • each spacer disk has a single chain link 202 distributed around the circumference of the milling tool, each chain link carrying a milling disk 204 at its outer end.
  • FIG. 13 shows a representation in which the rotational state of the milling tool is assumed, so that the outer chain links 202, which are connected in a chain-like manner to both the spacer disks 200 and the milling disks 204, fly horizontally outwards, as is also the case in FIG. 1 for longer chain-like Milling tools is shown.
  • the idle state such chains hang down under their own weight so that they can then be easily passed through areas of the chimney that have not yet been milled.
  • the milling disks 204 describe an active cone, which initially widens conically from top to bottom and then tapers again, and is designed to be axially symmetrical with respect to the middle spacer disk 200a in order to be able to mill both upwards and downwards in a double-acting manner while maintaining the same geometry. Since the milling disks of the middle spacer 200a are subjected to the greatest stress due to their largest radial radius and should therefore be chosen to be particularly robust in each case, it is also advisable, as shown, to make the middle spacer 200a stronger than the other spacers (with the same Material with greater thickness). The spacers have different radial widths corresponding to the respective radial radius of the active cone at the point in question, while the individual chain links 202 can all be selected in the same way.
  • the support body 192 is, as mentioned with regard to the milling tool described above, provided with a lower support, not shown, analogous to the support 196, on which here lies a single elongated spacer sleeve 198a (instead of the majority of the spacer sleeves) 198 and spacers 200 of the embodiment described above).
  • support plate 206 is arranged, which is square here.
  • a radially extending slot 208 is formed in each of the four corner regions of this square support plate 206, in each of which a set screw 210 engages from the sides facing away from the spacer sleeve 198a.
  • a set screw 210 engages from the sides facing away from the spacer sleeve 198a.
  • four bow-shaped milling blades 212 can be pivoted out over the circumference of the milling tool, but can also be fixed in a specific angular position when the set screws 210 are tightened.
  • the milling lamella 212 can also be freely moved axially along the elongated holes 208, this position also being excluded when the set screw is tightened.
  • the milling tools each have a cutting edge 214 on at least one outer narrow side. It is also conceivable to provide a cutting edge 214 on both edges of the milling lamella, although only one cutting edge is used in one working direction, be it for working under different operating conditions, be it for the purpose of reverse assembly for subsequent wear of both cutting edges.
  • the cross section of the milling lamella 214 can also be selected such that a cutting edge 214 only comes into question on one edge.
  • the cutting edges 214 are also radially axially from top to bottom issued on the outside to describe a conical knitting cone again. If the working direction is reversed, this workpiece can also be repositioned by exchanging the legs of the bow-shaped milling blades, on which the set screws 210 engage between the support plates 206.
  • this workpiece can also be repositioned by exchanging the legs of the bow-shaped milling blades, on which the set screws 210 engage between the support plates 206.
  • a support disk 216 is fastened to the lower end of the support body 192 in a manner similar to the previously described support 196, for example by means of a fastening screw, not shown, with which the support disk 216 is attached to the form-fitting from below is partially screwed into the support disc 216 engaging support body 192.
  • Each rectangular groove 218 which are equidistant in the circumferential direction and which run axially are distributed over the circumference of the support disk 216.
  • an oscillating block 220 which forms a straight, short lever and essentially takes up the width of the rectangular groove with relative mobility, is articulated on a bearing pin 222 so as to be oscillatable.
  • the bearing pin 222 is driven in with a positive fit through through bores 224 opposite each other on the respective rectangular groove 218.
  • the oscillating blocks are essentially flush with the upper end face of the support disk 216.
  • the upper ends of the oscillating blocks 220 are also beveled at least on their radially inner side of the milling head.
  • 15 shows a roof 226 of the same type inside and outside with a flat ridge design.
  • the ridge is essentially flush with the surface of the support plate 216 after the pivoting position of the oscillating block 220, while the radially inner roof slope 228 strikes the base of the rectangular groove 218 at a predetermined pivoting position of the oscillating block 220 and thus limits the pivoting out.
  • the double-sided roof design can be used to reverse the direction of installation if the vibrating block wears on one side.
  • a threaded bore 230 is recessed.
  • a high stress-absorbing stud 232 is firmly screwed, which with a little radial play serves as a bearing shaft for a cylindrical shell-shaped base body 234 of a milling head 236.
  • the milling head is complemented by milling pins 238, which fit into the cylindrical circumferential surface of the base body 234 are rigidly embedded and protrude radially from this peripheral surface, so that the base body and burrs together form a kind of radial hedgehog.
  • the burrs have the same length, so that the peripheral surface of the hedgehog describes a cylindrical, but possibly also a different envelope surface, for example an envelope surface slightly bulged in the middle axial length.
  • the pins themselves are straight and made of hard metal, for example a steel alloy or other hard metals or hard metal alloys.
  • the receiving holes of these rows are offset from one another with a gap, the rows being arranged equidistantly.
  • the head of the respective stud 232 is, as shown, embedded in the base body on its outer end face.
  • this tool can be used with the same geometry working both downwards and upwards, with a support body 192 then optionally on both end faces sides of the support plate 216 provides.
  • a support body 192 then optionally on both end faces sides of the support plate 216 provides.
  • the oscillating blocks 220 which act as straight oscillating arms, can still hang vertically downwards somewhat freely, if the milling tool is not set in rotation. Then the outer enveloping surfaces of the three milling heads 236 are supported against one another in such a way that all three milling heads are essentially axially aligned, so that insertion into a chimney cross-section which has not yet been milled is conveniently possible.
  • the vibrating blocks can also be brought into contact in this operating mode with their internal longitudinal surface at the bottom of the rectangular groove 218. You can also design the bottom of the "rectangle" groove bulged, in order to hold the oscillating block axially if necessary.
  • the embodiment shown does not permit a double-acting mode of operation without repositioning a support body 192 provided on both sides when fastening to the output shaft of the fluid motor 12.
  • the stop of the oscillating block 220 on the base of the rectangular groove 218 can be made detachable by means of a servo device such that the oscillating block is pivoted out of the hanging arrangement according to FIG. 5 into an essentially standing arrangement and there also by an outside, likewise servo adjustable support is fixed.
  • a servo control can in turn be carried out by means of the same equipment which is used for the operation of the fluid motor 12, but via a separate control line.
  • Such a striking mechanism can also be arranged at a different location, in particular between the fluid motor and its suspension, it is described in the following in the immediate connection after the rotor of the fluid motor. It replaces a separate reduction gear, in which the torque amplification of a reduction gear against an increase in effectiveness is exchanged by hammering. However, one can also combine torque amplifications by reduction and hammer action by means of striking mechanism if necessary.
  • a hammer carrier 242 of the striking mechanism is driven with the ratio 1: 1 by the rotor 50 of the pneumatic motor.
  • Two hammers 246 and two hammer pins 244 are loosely arranged in the hammer carrier 142 at diametrically opposite circumferential locations, the hammer pins 244 as end stops limiting a movement of the hammers 246 radially outwards under the centrifugal force.
  • the hammers 246 are carried in the direction of rotation.
  • the arrangement of the hammers 246 in the hammer carrier 242 is designed differently, which manifests itself in different circumferential lengths of the circumferential grooves to be accommodated and their different geometries.
  • the hammers 246 execute a wobbling movement.
  • the hammers 246 interact in the direction of rotation with an anvil 248 which, together with the output shaft 80 carrying the milling tool 16, forms a non-rotatable, preferably rigid, unit.
  • the anvil 248 is supported in the impact tool housing 250 via the bearing bush 252.
  • the output shaft 80 is thus also given a uniform mounting.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Milling Processes (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Drilling And Boring (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP89104394A 1988-03-12 1989-03-13 Dispositif pour élargir une cheminée à revêtir intérieurement par fraisage, ainsi que des applications Expired - Lifetime EP0341394B2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT89104394T ATE83305T1 (de) 1988-03-12 1989-03-13 Vorrichtung zum ausfraesen eines auszufuetternden schornsteins sowie anwendungen.
DD33864990A DD297866A5 (de) 1989-03-13 1990-03-13 Verfahren und vorrichtung zum spanabhebenden erweitern, insbesondere zum ausfraesen, eines auszufuetternden schornsteins sowie anwendungen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3808376A DE3808376A1 (de) 1988-03-12 1988-03-12 Vorrichtung zum ausfraesen eines auszufuetternden schornsteins
DE3808376 1988-03-12

Publications (4)

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EP0341394A2 true EP0341394A2 (fr) 1989-11-15
EP0341394A3 EP0341394A3 (en) 1990-01-31
EP0341394B1 EP0341394B1 (fr) 1992-12-09
EP0341394B2 EP0341394B2 (fr) 1995-09-13

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US (1) US5096262A (fr)
EP (1) EP0341394B2 (fr)
AT (1) ATE83305T1 (fr)
DE (3) DE3808376A1 (fr)
HU (1) HU208574B (fr)
RU (1) RU2071580C1 (fr)
WO (1) WO1989008802A2 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
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EP0583827A1 (fr) * 1992-08-18 1994-02-23 Holman, Harm Willem, Drs. Procédé pour préparer la démolition ou la destruction de bâtiments ou équivalents et des appareils pour la mise en oeuvre du procédé

Also Published As

Publication number Publication date
EP0341394B1 (fr) 1992-12-09
ATE83305T1 (de) 1992-12-15
HU208574B (en) 1993-11-29
HU891823D0 (en) 1991-04-29
HUT55898A (en) 1991-06-28
DE3808376A1 (de) 1989-09-28
US5096262A (en) 1992-03-17
WO1989008802A3 (fr) 1989-12-28
WO1989008802A2 (fr) 1989-09-21
DE58902935D1 (de) 1993-01-21
EP0341394A3 (en) 1990-01-31
DE8903096U1 (de) 1989-10-26
RU2071580C1 (ru) 1997-01-10
EP0341394B2 (fr) 1995-09-13

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