EP1685302B1 - Appareil facilitant la construction de grandes cuves neuves ainsi que l'inspection interne et la reparation de grandes cuves, du type chaudieres et reservoirs de recuperation - Google Patents

Appareil facilitant la construction de grandes cuves neuves ainsi que l'inspection interne et la reparation de grandes cuves, du type chaudieres et reservoirs de recuperation Download PDF

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Publication number
EP1685302B1
EP1685302B1 EP04775511A EP04775511A EP1685302B1 EP 1685302 B1 EP1685302 B1 EP 1685302B1 EP 04775511 A EP04775511 A EP 04775511A EP 04775511 A EP04775511 A EP 04775511A EP 1685302 B1 EP1685302 B1 EP 1685302B1
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EP
European Patent Office
Prior art keywords
girders
girder
halves
plank
locking
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Expired - Lifetime
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EP04775511A
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German (de)
English (en)
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EP1685302A1 (fr
Inventor
Anders Björklund
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E04G3/28—Mobile scaffolds; Scaffolds with mobile platforms
    • E04G3/30—Mobile scaffolds; Scaffolds with mobile platforms suspended by flexible supporting elements, e.g. cables
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E04G3/28—Mobile scaffolds; Scaffolds with mobile platforms
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E04G3/28—Mobile scaffolds; Scaffolds with mobile platforms
    • E04G3/30—Mobile scaffolds; Scaffolds with mobile platforms suspended by flexible supporting elements, e.g. cables
    • E04G3/305—Mobile scaffolds; Scaffolds with mobile platforms suspended by flexible supporting elements, e.g. cables specially adapted for tanks, silos or similar vessels
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
    • E04H7/02—Containers for fluids or gases; Supports therefor

Definitions

  • the present invention relates to an apparatus for facilitating new construction and internal inspection and repair of large vessels, such as recovery boilers and tanks.
  • the apparatus comprises a platform which is vertically adjustably suspended by means of suspension cords hanging down from a roof of the vessel, the platform being built from at least two parallel spaced-apart girders, to which the suspension cords are attached, and at least one plank being arranged perpendicular to the girders and interconnecting the same, the plank resting on the girders and at least partly covering the same.
  • US-A-5,007,501 discloses an apparatus, which is especially intended for the boiler in a thermal power station and which eliminates some of the problems occurring in the same. More specifically, a smaller number of parts are required for the known apparatus than for a traditional scaffold which is erected standing on the bottom of the large vessel. However, the mounting of the prior-art apparatus is still based on initial mounting from the bottom of the large vessel, still comprises a large number of parts that must be assembled, and does not solve all the problems of accessibility in a satisfactory manner.
  • Japanese Published Application JP-A-2000-054618 discloses an apparatus as stated by way of introduction, which eliminates at least one of the problems with the solution according to US-A-5,007,501 .
  • the apparatus according to the Japanese publication thus solves the problem with the initial mounting from the bottom of the vessel, but at the same time its applicability is limited significantly by the fact that the footboard, which is formed of said at least one plank, extends only perpendicular to the girders. This greatly limits the applicability and safety of the apparatus when, because of an obstacle, a gap must be left between two neighbouring planks.
  • the object of the invention is to improve the known apparatus according to JP-A-2000-054618 in such a manner that the remaining problems with this apparatus are eliminated and moreover a considerably more flexible and safer apparatus is provided, which for new construction, inspection and repair is universally applicable to all types of large vessels.
  • an apparatus of the type mentioned by way of introduction said apparatus being characterised in that the girders are individually vertically adjustable first lattice girders, to which the suspension cords are attached and which have flat upper sides forming a footboard.
  • the apparatus comprising individually vertically adjustable lattice girders, which have a built-in plank for walking, there is provided, in contrast to JP-A-2000-054618 , a safe floor surface also along the girders.
  • the lattice girders are insertable in a hanging manner through manholes in the vessel at any level without necessitating setting foot upon the bottom of the vessel.
  • Said at least one plank is then arrangeable in any position between two parallel suspended lattice girders. It will thus be possible to inspect, from the thus provided platform, for instance all walls of a recovery boiler, i.e.
  • the girders of the apparatus are preferably rectangular in cross-section, and the suspension cords are suitably attached to them by enclosing holders which enclose the respective girders and have an upper side which has a centrally arranged fastening means for each suspension cord.
  • the advantages of girders that are rectangular in cross-section are that they have an excellent load-carrying capacity, that, if desired, they can easily be connected perpendicular to a corresponding girder of rectangular cross-section, and that outside the vessel they are stackable in an advantageous way.
  • Said enclosing holders each preferably consist of two essentially C-shaped halves, with the C openings facing one another, said halves having at their upper and lower ends lugs, through which locking cotter pins are movable for locking said halves together.
  • the lugs of the enclosing holders form at the upper ends said fastening means for the suspension cords. It will thus in an advantageous manner be possible to use the same locking cotter pin both for locking together the halves of the enclosing holders and for attaching a suspension cord.
  • the halves of the enclosing holders are suitably made of a band material of steel bent to the cross-sectional contour of the girders.
  • Steel has the advantage that it is very stable in shape and has great tensile strength and that it is easy to weld, which considerably facilitates the attachment of the lugs for the locking cotter pins.
  • the apparatus according to the invention may, if desired, comprise at least one additional girder, which is of the same type as said first lattice girders and is suspended under at least one of those at a fixed distance. It will thus be easy to provide a platform with several storeys.
  • the additional girder suitably should be rectangular in cross-section and that it is advantageous if it is suspended by enclosing holders, which enclose the girder and which are suspended from the superposed girder by means of suspension bands arranged on both sides of the girder.
  • the last-mentioned enclosing holders preferably each consist of two substantially C-shaped halves, with the openings facing one another, said halves having at their upper and lower ends lugs, through which locking cotter pins are movable for locking said halves together.
  • the last-mentioned enclosing holders suitably consist of halves which are made of a band material of steel which is bent to the cross-sectional contour of the additional girder.
  • the suspension bands that are used for suspending an additional girder from a superposed girder are preferably steel bands, which at their ends have holes, through which locking cotter pins are movable for locking engagement in corresponding holes in the sides of the enclosing holders of the associated girders.
  • the steel bands are also advantageous because of the good tensile strength of the steel and the fact that the holes formed therein need no extra reinforcement.
  • the apparatus according to the invention can be extended further by at least one additional girder being suspended under two spaced-apart girders at a fixed distance and by at least one telescopic plank, arranged perpendicular to the girders, resting on the additional girders and interconnecting the same.
  • Said at least one plank is preferably telescopic.
  • the telescopic design makes it easier to adjust the apparatus to different conditions prevailing in the vessel.
  • the telescopic plank preferably consists of an outer and an inner mutually telescoping U section, which have downwardly directed U openings with ends curved inwards and the projection of which is limited by a pullout-limiting means.
  • the advantage of the ends curved inwards is that they contribute to good mutual displaceability of the U sections since a point charge is avoided.
  • the pullout-limiting means is for natural reasons necessary to prevent the two cooperating U sections from unintentionally sliding apart.
  • Said pullout-limiting means suitably comprises at least one spring-biased pin, which for locking is arranged to be automatically moved from the inner U section through lock openings in the legs of the U-shaped sections.
  • the outer U section has, at an end which is adapted to rest on a girder, at least one vertical hole for insertion of a locking cotter pin, which is arranged to engage in a corresponding hole in the upper side of the girder.
  • This type of securing of the plank relative to the girder is important especially for the outermost girder of a platform construction.
  • the suspension cords are suitably chains hanging down from electrically operated telphers arranged on the roof of the vessel.
  • Advantages of chains are that, in contrast to wires that are used according to US-A-5,007,501 , they cannot be untwined and that they can be handled with greater accuracy by chain telphers than wires which are wound in layers by a wire winch.
  • telphers are preferably individually remote controlled from the interior of the vessel. It will thus be easily possible to vertically adjust individual girders inside the vessel.
  • Fig. 1 illustrates parts of a pressure vessel 1 for a recovery boiler, in which an apparatus according to the invention is used for inspection and repair purposes.
  • an apparatus according to the invention is used for inspection and repair purposes.
  • the apparatus for the same purpose also in other types of pressure vessels, such as a bark-fired boiler, or inside a vessel, such as an oil tank.
  • a vessel such as an oil tank.
  • it can be used in new construction of such vessels.
  • the pressure vessel 1 in Fig. 1 has, among other things, walls 2 with manholes 3 formed therein, a so-called nose 4 mentioned by way of introduction, a protective roof 5 and a roof 6, from which a number of superheaters 7 are suspended.
  • the superheater 7 constitutes one of the parts that are of special interest to be examined in connection with an inspection. However, they make such inspection difficult by forming, between them, narrow vertical passages, which may have a height of several meters and are partly positioned above the nose 4. Some of the passages extend parallel to the plane of the drawing in Fig. 1 , and some 8 extend vertically to this plane.
  • the manholes 3 are preferably arranged at least at one end of the passages 8.
  • the apparatus according to the invention is shown in Fig. 1 to the right and to the left in the form of two platforms 10 with slightly different configurations.
  • a common feature of the two platforms 10 is that the components included therein are identical since they constitute parts of a construction kit which can be extended as desired to be adjusted to the prevailing situation.
  • Each platform 10 includes lattice girders 11 and telescopic planks 12 as the main components.
  • the uppermost are horizontally suspended parallel to each other both in the passages 8 and outside the same by chains 13 hanging down from electric telphers 14 mounted on the roof 6 of the vessel 1.
  • the telphers are remote controlled and can advantageously be used, for instance, in order to initially pull in a girder into the vessel 1 through a suitable manhole 3.
  • the lower girders 11 are suspended from the superposed girders 11 by means of steel bands 15 which are arranged on both sides of the girders 11. The suspension of both the upper and the lower girders 11 will be described in more detail below with reference to Figs 4-6 , and the construction of the girders 11 will be discussed below with reference to Figs 2-4 .
  • the telescopic planks 12 shown in Fig. 1 rest on girders 11 hanging at essentially the same level, and extend, seen from above, perpendicular to these girders 11. They are thus arranged perpendicular also to the passages 8 and can therefore be used to reach the passages (those parallel to the plane of the drawing) which are perpendicular to these passages 8.
  • the construction of the planks 12 will be described in detail below with reference to Figs 7-9 .
  • Fig. 2 is a side view of a part of a lattice girder 11
  • Fig. 3 is a top plan view of a corresponding part
  • Fig. 4 is an end view of a plurality of such girders 11.
  • the girder 11, which is rectangular in cross-section, is made of aluminium and comprises four longitudinal main pipes 16 arranged in the cross-sectional corners.
  • a grid structure of thinner pipes or rods 17, which stabilises the main pipes 16, extends between these main pipes 16 in a zigzag.
  • a footboard plate 18 is attached, which has a grooved anti-skid upper side 19.
  • coupling means (not shown) of prior-art type can be arranged for a possible extension of the girder 11 or for connection of a ladder for instance.
  • the chains 13 as well as the steel bands 15 are attached, as is evident from Fig. 4 , to the girders 11 by enclosing holders 20, 21, of which the holder 20 is intended especially for the upper girders 11 and is shown in more detail in Fig. 5 , and the holder 21 is intended for the lower girders 11 and is shown in more detail in Fig. 6 .
  • the holder 20 comprises two essentially C-shaped halves 22, 23 shaped according to the cross-sectional contour of the lattice girder 11, with the openings facing one another, said halves being made of a bent band material of steel.
  • Said halves 22, 23 have lugs 24, 25 at their upper ends and lugs 26, 27 at their lower ends, which at the upper ends consist of vertically upwardly bent portions of the band material and which at the lower ends consist of tubular sleeves which are welded to the band material.
  • a cotter pin 28 is moved through the lugs 24, 25 for attaching the above-mentioned chains 13, said cotter pin suitably belonging to a shackle 29, into which a hook 30 at the lower end of a chain 14 can be hooked.
  • the lugs 26, 27 are preferably connected to each other by means of a locking cotter pin 31, which is moved through the tubular sleeves and then locked.
  • the holder 21 also comprises two essentially C-shaped halves 32, 33 shaped according to the cross-sectional contour of the lattice girder 11, with the openings facing one another, said halves being made of a bent band material of steel.
  • Said halves 32, 33 have lugs 34, 35 at their upper ends and lugs 36, 37 at their lower ends, which at both the upper and the lower ends consist of tubular sleeves which are welded to the band material.
  • the lugs 34-37 are preferably connected to each other by means of locking cotter pins 38 which are moved through the tubular sleeves and then locked.
  • the steel bands 15 To attach the above-mentioned steel bands 15 to the sides of the girders 11, the steel bands 15 have holes 39 formed at their ends, and both the holder 20 and the holder 21 have holes 40 formed in their sides, through which locking cotter pins 41 can be moved and then be locked.
  • Fig. 7 is a top plan view of a part of a telescopic plank 12
  • Fig. 8 is a side view of a corresponding part
  • Fig. 9 is a sectional view of a part of the plank 12 corresponding to the situation in Fig. 7 .
  • the plank 12 consists of an outer and an inner mutually telescoping U section 42, 43, which have downwardly directed U openings with ends 44, 45 curved inwards, which give the telescopic plank 12 a good load-bearing capacity.
  • the sections 42, 43 have a grooved anti-skid surface 46, 47 and a pullout-limiting means 48 for limiting the possible projection.
  • the pullout-limiting means 48 comprises two pins 50 which are biased by means of a leaf spring 49 and which for locking are arranged to be automatically moved from the inner U section 43 through lock openings 51, 52 in the legs of the U-shaped sections 42, 43.
  • the pins 50 are fixedly connected to a cable 53 which is connected to both pins 50 and thus allows simultaneous release of the two pins 50.
  • the sections 42, 43, preferably the outer section 42, can also, for reasons of safety, at one end which is adapted to rest on a girder 11 have at least one vertical hole for insertion of a locking cotter pin, which is arranged to engage in a corresponding hole in the upper side of the girder 11.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Bridges Or Land Bridges (AREA)
  • Movable Scaffolding (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Emergency Lowering Means (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Claims (17)

  1. Appareil pour la facilitation de nouvelles constructions et l'inspection et la réparation interne de grandes cuves (1), telles que des chaudières de récupération et des citernes, ledit appareil comprenant une plateforme (10) suspendue à une hauteur réglable par des cordes de suspension (13) qui pendent vers le bas à partir d'un toit (6) de la cuve (1), la plateforme (10) étant constituée d'au moins deux poutres parallèles (11) espacées entre elles, auxquelles sont attachées les cordes de suspension (13), et au moins une planche (12) disposée perpendiculairement aux poutres (11) et reliant ces dernières, la planche reposant sur les poutres (11) en les recouvrant au moins partiellement, caractérisé en ce que les poutres (11) sont des premières poutres de charpente (11) individuellement réglables dans la verticale, auxquelles sont attachées les cordes de suspension (13) et possédant des faces supérieures plates formant un marchepied (18).
  2. Appareil selon la revendication 1, caractérisé en ce que les poutres (11) présentent une section transversale rectangulaire, et en ce que les cordes de suspension (13) sont attachées à celles-ci par des supports enrobants (20) entourant chacune des poutres (11) et possédant un côté supérieur avec des moyens de fixation (24, 25) disposés de façon centrale pour chaque corde de suspension (13).
  3. Appareil selon la revendication 2, caractérisé en ce que les supports enrobants (20) sont chacun composés de deux moitiés essentiellement en forme de C (22, 23), avec les ouvertures C situées l'une en face de l'autre, lesdites moitiés possédant des saillies (24-27) à leurs extrémités supérieure et inférieure, au moyen desquelles des goupilles de blocage (28-31) sont déplaçables pour bloquer les deux moitiés (22, 23) ensemble.
  4. Appareil selon la revendication 3, caractérisé en ce que les saillies (24, 25) aux extrémités supérieures forment lesdits moyens de fixation.
  5. Appareil selon l'une des revendications 3 ou 4, caractérisé en ce que lesdites moitiés (22, 23) sont constituées d'une bande d'acier courbée vers le contour de la section transversale des poutres (11).
  6. Appareil selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'au moins une poutre supplémentaire (11), du même type que lesdites premières poutres (11), est suspendue en-dessous d'au moins l'une de celles-ci, à une distance déterminée.
  7. Appareil selon la revendication 6, caractérisé en ce que la poutre supplémentaire (11) présente une section transversale rectangulaire, et en ce qu'elle est suspendue par des supports enrobants (21) entourant la poutre et suspendus aux poutres superposées (11) au moyen de bandes de suspension (15) disposées des deux côtés de la poutre (11).
  8. Appareil selon la revendication 7, caractérisé en ce que les supports enrobants (21) sont chacun constitués de deux moitiés (32, 33) essentiellement en forme de C, avec les ouvertures situées l'une en face de l'autre, lesdites moitiés possédant des saillies (34-37) à leurs extrémités supérieures et inférieures, au moyen desquelles des goupilles de blocage (38) sont déplaçables pour bloquer lesdites moitiés (32, 33) ensemble.
  9. Appareil selon l'une des revendications 7 ou 8, caractérisé en ce que lesdites moitiés (32, 33) sont constituées d'une bande d'acier courbée vers le contour de la section transversale de la poutre supplémentaire (11).
  10. Appareil selon l'une quelconque des revendications 2 à 5 et l'une quelconque des revendications 6 à 8, caractérisé en ce que les bandes de suspension sont des bandes d'acier (15) possédant des orifices (39) à leurs extrémités, au moyen desquels des goupilles de blocage (41) sont déplaçables pour un bloquer l'engagement dans des orifices correspondants (40) dans les côtés des supports enrobants (20, 21) des poutres (11) associées.
  11. Appareil selon l'une quelconque des revendications 6 à 10, caractérisé en ce que l'au moins une poutre supplémentaire (11) est suspendue en-dessous de deux poutres espacées (11) à une distance déterminée, et en ce qu'au moins une planche (12) est disposée perpendiculairement aux poutres (11), en reliant les poutres (11), ladite planche reposant sur les poutres supplémentaires (11) en les recouvrant au moins partiellement.
  12. Appareil selon l'une quelconque des revendications 1 à 11, caractérisé en ce que l'au moins une planche (12) est téléscopique.
  13. Appareil selon la revendication 12, caractérisé en ce que la planche téléscopique (12) est constituée d'une section en U extérieure et d'une section en U intérieure mutuellement téléscopiques (42, 43), possédant des ouvertures en U dirigées vers le bas, avec des extrémités (44, 45) courbées vers l'intérieur et dont la projection est protégée par un moyen anti-arrachement (48).
  14. Appareil selon la revendication 13, caractérisé en ce que le moyen anti-arrachement (48) comprend au moins une cheville déviée par ressort (50), qui pour le blocage est conçue de manière à pouvoir être déplacée automatiquement de la section en U intérieure (43) par des ouvertures de blocage (51, 52) dans les branches des sections en U (42, 43).
  15. Appareil selon l'une des revendications 13 ou 14, caractérisé en ce que la section en U extérieure (42) à une extrémité adaptée pour reposer sur une poutre (11) possède au moins un orifice vertical pour l'insertion d'une goupille de blocage, conçue pour s'engager dans un orifice correspondant dans le côté supérieur de la poutre (11).
  16. Appareil selon l'une quelconque des revendications 1 à 15, caractérisé en ce que les cordes de suspension sont des chaînes (13) pendant vers le bas à partir de palans à chaînes (14) actionnés de façon électrique et installés sur le toit (6) de la cuve (1).
  17. Appareil selon la revendication 16, caractérisé en ce que les palans à chaînes (14) sont individuellement contrôlés à distance, depuis l'intérieur de la cuve (1).
EP04775511A 2003-10-06 2004-10-06 Appareil facilitant la construction de grandes cuves neuves ainsi que l'inspection interne et la reparation de grandes cuves, du type chaudieres et reservoirs de recuperation Expired - Lifetime EP1685302B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0302639A SE525265C2 (sv) 2003-10-06 2003-10-06 Anordning för underlättande av nybyggnad samt invändig inspektion och reparation av stora kärl, såsom sodapannor och cisterner
PCT/SE2004/001420 WO2005033441A1 (fr) 2003-10-06 2004-10-06 Appareil facilitant la construction de grandes cuves neuves ainsi que l'inspection interne et la reparation de grandes cuves, du type chaudieres et reservoirs de recuperation

Publications (2)

Publication Number Publication Date
EP1685302A1 EP1685302A1 (fr) 2006-08-02
EP1685302B1 true EP1685302B1 (fr) 2010-02-24

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EP04775511A Expired - Lifetime EP1685302B1 (fr) 2003-10-06 2004-10-06 Appareil facilitant la construction de grandes cuves neuves ainsi que l'inspection interne et la reparation de grandes cuves, du type chaudieres et reservoirs de recuperation

Country Status (16)

Country Link
US (1) US20070209872A1 (fr)
EP (1) EP1685302B1 (fr)
JP (1) JP2007507632A (fr)
KR (1) KR20070004534A (fr)
CN (1) CN100416019C (fr)
AT (1) ATE458878T1 (fr)
AU (1) AU2004277575A1 (fr)
BR (1) BRPI0415080A (fr)
CA (1) CA2541062A1 (fr)
DE (1) DE602004025725D1 (fr)
DK (1) DK1685302T3 (fr)
EA (1) EA008309B1 (fr)
NO (1) NO20061484L (fr)
SE (1) SE525265C2 (fr)
WO (1) WO2005033441A1 (fr)
ZA (1) ZA200602794B (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10451269B2 (en) * 2016-03-21 2019-10-22 General Electric Company System and method for supporting a boiler load
CN107490004B (zh) * 2017-08-20 2019-10-11 福建俊佑机电设备有限公司 发电厂锅炉分离器中心筒改造方法
US10926599B2 (en) * 2017-12-01 2021-02-23 Divergent Technologies, Inc. Suspension systems using hydraulic dampers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4058184A (en) * 1976-04-15 1977-11-15 Hugh J. Baker & Company Scaffold
US4474497A (en) * 1983-04-14 1984-10-02 Combustion Engineering, Inc. Furnace maintenance platform
US5007501A (en) * 1989-09-01 1991-04-16 Baston Peter J Apparatus for facilitating the internal inspection and repair of large pressure vessels
JP2000054618A (ja) * 1998-07-31 2000-02-22 Koyo Kikai Sangyo Kk 吊足場における桁材の連結構造、及び架設足場板の押圧支持構造、並びに足場板

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Publication number Publication date
ZA200602794B (en) 2007-07-25
WO2005033441A1 (fr) 2005-04-14
KR20070004534A (ko) 2007-01-09
JP2007507632A (ja) 2007-03-29
BRPI0415080A (pt) 2006-12-12
SE0302639D0 (sv) 2003-10-06
SE0302639L (sv) 2005-01-18
CA2541062A1 (fr) 2005-04-14
ATE458878T1 (de) 2010-03-15
NO20061484L (no) 2006-07-06
EP1685302A1 (fr) 2006-08-02
US20070209872A1 (en) 2007-09-13
EA200600674A1 (ru) 2006-08-25
EA008309B1 (ru) 2007-04-27
SE525265C2 (sv) 2005-01-18
AU2004277575A1 (en) 2005-04-14
DK1685302T3 (da) 2010-06-14
CN1863977A (zh) 2006-11-15
DE602004025725D1 (de) 2010-04-08
CN100416019C (zh) 2008-09-03

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