KR101757288B1 - Method of dismantalling furnace scaffolding support system by way of wire rope - Google Patents

Abstract

By means of the start-up, it is possible to provide a method for releasing a wire rope-type scaffold for a boiler only. More specifically, the present invention can provide a process for dismantling a boiler-only in-cabinet scaffolding system in which the load applied to the scaffolding system is distributed to improve stability.

Description

TECHNICAL FIELD [0001] The present invention relates to a wire rope type scaffolding system for a boiler, and more particularly, to a method of dismounting a wire rope type scaffolding system for a boiler,

By means of this disclosure, the present invention provides a method for dismantling a scaffolding system using wire ropes.

Scaffolding is a temporary scaffold that makes it possible to work in a high position and can be used mainly as a platform for transporting materials, a worker's passageway or work. In general, scaffolding can be made rigid by hanging wale and joist on the scaffold column. Logs or pipes can be used as the material of the scaffold, and can be bound mainly by using multiple strands of wire. Depending on the application, scaffolds can be made in a variety of forms, such as external scaffolding, internal scaffolding, horizontal scaffolding, moon scaffolding, simple scaffolding, or ladder scaffolding.

Schedule of the Power Plant Preventive maintenance period In order to perform internal maintenance work on the boiler, a scaffold optimized for the large boiler of the power plant different from the scaffold commonly used is needed. The scaffold is largely divided into a steel pipe scaffold and a system scaffold. Unlike a steel pipe scaffold which can be installed arbitrarily, a scaffold used in a power plant is standardized through structural calculation. When the internal maintenance and condition check of a large boiler wall, Is a useful device that allows access to the field. The scaffolding system used in most power plants before 2013 was designed and manufactured as a customized product in consideration of the mobility and installation convenience of entering the boiler by the foreign system scaffolding system (Table 1). The actual scaffold was used at less than the design safety factor because a large amount of members were missing due to installation work time and lack of understanding of the operator's system.

 In addition, although the scaffold installation method using the conventional technique can easily access the inside of the boiler furnace, the installation height is as high as about 50 m, and since the structure is stacked from the bottom, the load is concentrated on the lower part of the structure, .

Accordingly, in order to solve the above problems, a scaffold system of a pendent assembly type which can improve the reliability of the scaffold supporting the scaffold at the work in the boiler room, and can quickly install and disassemble the scaffold of a stable load structure is developed .

Prior art of the pendant assembly type scaffold system is disclosed in Korean Patent No. 10-1236184, in which the load of the scaffold is dispersed to the upper and lower portions to prevent the load from concentrating only at the lower portion. In the thermal power plant, tube wire scaffolding and dismantling method in which a large number of workers can safely carry out inspection and maintenance work of a hanger tube bundle and the like.

However, in the above method, if the pendent scaffold load is transferred to the plate-type superheater pipe bundle and the long-time temporary work station is installed, the integrity of the tube may be adversely affected. In case of applying to the boiler of the vertical type superheater pipe- It is difficult to apply it due to structural interference caused by the structure.

(Prior art document 1) Japanese Patent Application Laid-Open No. 2007-085590 (published on Apr. 05, 2007) (Prior Art 2) Korean Patent Registration No. 10-1024655 (registered on Mar. 17, 2011)

It is an object of the present invention to provide a dismantling method for a boiler dedicated scaffold system using a wiler rope in which a wire is supported on the upper portion of a boiler so that load is distributed on the upper portion of the boiler and the load is distributed and safety is improved.

According to one embodiment, a method may be provided for dismantling a wire rope-based scaffolding system exclusively for a boiler installed using a hydraulic lifting device, upper and lower support platforms, and pendant in-bed scraping devices, Separating the wire rope for dispersing the wire rope, separating the wire rope for the load distribution by removing the wire clip of the nose portion, separating the shackle installed in the fixing lug of the nose portion to remove the wire rope for load distribution, Pendant In-line scaffold separating process to separate the wire rope and guide rail after removal of handrail, footrest, work footrest, and crossbar installed at the 0th stage of the boiler, By using the device, the pendant in-door scraper can be installed in the pre- Pendant In-line Scraper Separation Process, Pendant In-Scale Scraper Separation Process and Pendant In-Scale Scraper In the first stage of the boiler, the upper and lower support platforms are positioned so that the remaining platform is completely disassembled. The upper and lower support platform lowering step for lowering the upper and lower support platforms located at the first stage of the boiler to the zero stage of the boiler, removing the platform drum brackets included in the upper and lower support platforms to separate a plurality of platform lines, Platform platform platform frame, platform to platform and platform connection drums, removal of lift anchor holder to remove wire rope, upper and lower support platform separation process, lifting to separate lifting wire from hydraulic lifting device A wire separating process, And a loop tube removal process for removing the loop tube including the hole for lifting from the portion.

According to one embodiment, in the pendant furnace interior scraper device separation process, the attachment of the pendant interior scraper can be removed in the order of removing the handrail, removing scaffold internal moving stairs, removing the scaffold, and removing the crosspiece.

According to one embodiment, since the dismantling work of the scaffold system is performed at the lower end of the boiler, the disassembling process is simplified, and convenience of disassembling can be provided without requiring a specialized work force.

According to one embodiment, by specially designing the fastener for fastening the work rope of the wire rope, as the load is added, the fastener further tightens the wire rope so that the fastening force can be increased. As a result, the stability of the scaffold system can be further improved.

1 is a flow chart showing a method for installing a wire rope-type scaffolding system dedicated to a boiler.
2 is a view showing a wire rope type scaffolding system dedicated to a boiler.
3 is a view showing a process of fixing the nose portion of the scaffold system and further installing a critical scaffold load sensing device.
4 is an embodiment showing a tightened wire fastening as load is applied to the wire rope-like scaffold system according to an embodiment of the present invention.
5 is a flowchart illustrating a method of dismantling a wire rope-type scaffolding system dedicated to a boiler according to an embodiment of the present invention.
FIG. 6 is a flowchart illustrating a procedure for separating a pendant in-door scraper according to an exemplary embodiment of the present invention.

Hereinafter, an embodiment according to the present invention will be described with reference to the accompanying drawings. The present embodiments are not intended to be limiting.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

The terms spatially relative, "below", "beneath", "lower", "above", "upper" May be used to readily describe an element or component and other element or components of the correlation. Spatially relative terms should be understood to include, in addition to the orientation shown in the drawings, terms that include different orientations of members during use or operation. For example, "upper" can be interpreted as "lower" when a member shown in the drawing is inverted. The members can also be oriented in different directions, so that spatially relative terms can be interpreted according to orientation.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. &Quot; comprises, "and / or" comprising ", as used herein, unless the recited element, step, operation and / Or additions.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

1 is a flowchart illustrating a method of installing a wire rope-type scaffolding system dedicated to a boiler according to an embodiment of the present invention.

According to an embodiment of the present invention, the present invention provides a method of manufacturing a hydraulic lifting apparatus, including a step S110 of installing a hydraulic lifting device, a step S120 of installing a loop tube, an upper and lower support platform assembling step S130, a lifting wire installing step S140, The boiler is exclusively used for the boiler through the platform lifting step S150, the pendant furnace scraper installation step S160, the pendant furnace scraper lifting step S170, the pendant furnace scraper installation step S180, and the load dispersing device installing step S190. A method of installing a wire rope type scaffolding system of the present invention can be provided.

According to one embodiment, the step S110 for installing the hydraulic lifting device includes a hydraulic unit for controlling the hydraulic lifting device, a hydraulic cylinder for lifting the lifting wire, a pulley and a winding for lifting the lifting wire including the lifting wire rope The drum can be assembled and fixed to the heavy girder.

According to one embodiment, the step of installing the loop tube (S120) may include a step of installing a plate including a hole for lifting in a lower portion of the heavy girder.

According to one embodiment, the upper and lower support platform assembling process (S130) includes lowering at least one strand through the hole into the boiler, fastening the strand to the wire rope through the lift anchor holder, The platform frame, the platform-to-platform and platform-connecting drums can be installed at predetermined positions and predetermined angles using connection pins, and a plurality of platform lines can be installed using the platform drum supports.

According to one embodiment, the lifting wire installation step (S140) is to connect the lifting wire to the pulley of the lifting device, connect the platform frame selected in the plurality of platform lines to the wire rope using platform connection lugs, A platform safety footrest can be installed by using a steel pipe pipe on the top of the platform line.

According to one embodiment, the upper and lower support platform lifting process (S150) can lift a plurality of platform lines assembled at stage 0 of the boiler to the first stage of the boiler using a hydraulic lifting device.

According to an embodiment, the step of installing the pendant in-floor scraper (S160) is performed by assembling the footrest, the footrest, and the crossbar on the front surface, the back surface, the left surface and the right surface of the plurality of platform lines until the surface of the footrest, The wire rope fixing lug is fixed to the lower part of the platform line of the wire rope fixing lug by bolts and the wire rope for scaffolding for fixing the scaffold to the wire rope fixing lug is fixed by using bolts, The work footrest is connected to the corner support and corner footrests by fixing the footrest to the footrest, and fixed to the inner wall of the boiler by the inner wall brace of the boiler. can do.

According to one embodiment, the pendent furnace scraper lifting process (S170) may lift the pendant furnace scraper to the first end of the boiler using a hydraulic lifting device.

According to one embodiment, the pendant in-bed scraper device repeating installation process (S180) can repeat the pendant furnace scraper installation process and the pendant furnace scraper hoisting process until close to the bottom of the nose portion.

According to one embodiment, the load dispersing device installing step (S190) may be provided with a load distribution supporting structure for distributing the load by connecting the load distribution wire rope to the platform at the top of the roof tube.

FIG. 2 is a view of a wire rope type scaffolding system dedicated to a boiler installed using the method of FIG. 1, according to an embodiment.

The wire rope type scaffolding system for a boiler according to the present invention mainly includes a heavy girder 1, a hydraulic lifting device 2, a lifting wire 3, a roof tube 4, upper and lower support thrust structure platforms 5, Attaching system 6 and a pendant in-door scaffolding system 7, and an installation example is as shown in Fig. Also, the scaffolding and lifting system of the platform support system of the present invention can be installed in a boiler furnace of a thermal power plant.

According to an embodiment, the wire lifting system of the present invention can be fixedly installed in the heavy gear portion. Also, the lifting distance and the lifting position can be controlled by the tuning system. In addition, the lifting system and the load fixing device can be fixedly installed at a predetermined position.

The heavy girder (1) is installed at the top of the boiler so that the steel beams are spaced laterally and the other steel beams are vertically spaced and fixed by screws or welding.

The heavy girder 1 can be combined with the hydraulic lifting device 2 to support the load of the in-furnace wire scaffolding system. According to one embodiment, the hydraulic lifting device 2 is fixed to the heavy girder 1 and includes a hydraulic cylinder having a structure capable of lifting the lifting wire 4 and a stroke simultaneously, a lifting wire The pulleys, including the drum to wind the windings, are tuned to the same stroke and stroke with the lifting wire.

The lifting device (2) is capable of lifting the upper and lower support thrust structure platform (5) by one step by connecting the lifting wire (4) to the pulley.

The roof tube 3 is provided at the lower part of the heavy girder 1 and is constituted by a plate including a lifting hole drilled down to pull the lifting wire 4 into the boiler.

It is preferable that the loop tube 3 be drilled in the lower portion where the inflow and lifting device 2 and the lifting wire 4 are installed to minimize the movement of the lifting wire 4.

The lifting wire 4 is hooked on a pulley of the hydraulic lifting device 2 and has one end joined to a lifting lug attached to the upper surface of the upper and lower support thrust structure platform 5, It can be salvaged.

The upper and lower support thrust structural platform 5 comprises a conformal angle, channel, wire rope anchor, lifting lug, wall mounting system and work footrest.

Meanwhile, the upper and lower support thrust structural platform 5 arranges the isosceles angles horizontally, arranges the channels longitudinally, welds and fixes the meeting points, assembles the high-tension bolts and the shovel hooks to the outside of each side Two angled corners or one side of the channel are inserted and installed, and a lifting lug which engages with the hoisting wire 4 is fixed to the upper surface of the angled angle and the channel.

The wire rope fixing portion includes a high-tension bolt, a shovel hook, a pin, and a rod fixing jig.

The high-strength bolt has a bolt shape that can be fitted into a channel, and has a pawl portion for hooking a wire rope on a shovel hook, and a penetrating portion for connecting a rod fixing jig and a pin on the upper portion. A penetrating hole, and an insertion groove into which the penetrating portion is inserted.

Wherein the wire rope fixing portion is welded and fixed to a welding portion formed in a channel of the high-tension bolt, and the shovel hook includes a claw portion for hooking the wire rope, and a penetration portion for mounting the pin on the claw portion, An insertion groove into which the shovel hook is inserted, and a through hole through which the pin passes.

The high-tension bolt is inserted into a hole formed in the channel and then welded and fixed. The lower end of the high-tension bolt is connected to the rod fixing jig. The shovel hook is inserted into the insertion groove of the rod fixing jig, You can hang wire rope.

On the other hand, during the initial installation of the upper and lower support thrust structure platforms 5, the upper and lower support thrust structure platforms 5 are confirmed to be able to lift the upper and lower support thrust structure platforms 5 in a stable and balanced manner, It is preferable to attach the lifting lug to the lifting wire 4.

The above-mentioned wall surface mounting system is installed on the upper side of the upper and lower support thrust structure platforms 5 and is constituted by four hinge structures. When the folded structure is folded up after having a folded structure in lifting, So that the trust structure platform 5 can mutually support.

In addition, the wall surface mounting system may be formed of rubber or magnet so as to adhere to the wall, so that the wall surface and the upper and lower support thrust platform can maintain an interval of 250 to 3,000 mm.

When the two angled angles or channels are horizontally arranged, they can serve as a footrest. The upper and lower support thrust structure platform 5 is provided with a work footrest as a whole, and after the work footrest is installed, 4) are lifted by one step, and it is preferable that the operator installs the upper and lower support thrust structure platform 5 and the pendant scaffold system 7 at the zero stage.

FIG. 3 is a view illustrating a process of fixing a nose portion of the scaffold system of the present invention and further installing a critical scaffold load sensing device according to an embodiment.

According to the method of FIG. 3, the present invention may further include a step S310 of fixing the nose portion and a step S320 of installing the critical load sensing device.

According to one embodiment, in step S310 of fixing the nose portion, the wire rope for load distribution is inserted through the hole of the nose portion, and then the wire rope for load distribution is fixed to the fixing lug of the nose portion by using a shackle, The platform rope of the dispersing wire rope can be secured using wire clips.

According to an embodiment, in step S320 of installing a critical load sensing apparatus, a load sensing unit installed under the platform scaffold system to sense a load applied to the scaffold system in real time, An alarm generating unit for generating an alarm sound for a load out of the critical load under the control of the control unit and the control unit for controlling the wire fastening such that the wire fastening tightens the wire rope when the data is out of the predetermined critical load.

The pendant furnace internal scraping device lifting process may be characterized in that, when a load greater than a predetermined load threshold value is applied during a process of lifting the pendant furnace scraping device, the outside of the wire rope is tightened using a wire fastener.

FIG. 4 is an embodiment showing a wire fastener tightened as a load is applied to the wire rope-like scaffold system according to an embodiment of the present invention. FIG.

According to one embodiment, the wire rope fixing portion may include a wire fastening portion that can tighten the outer side of the wire rope as the load applied to the upper and lower support thrust structure platforms increases.

As shown in Figure 4, the wire fastener may include a clip to secure the wire rope. The load may increase in the process from <a> to <b>. At this time, if the load can not withstand the increased load, the fixing of the wire rope may be loosened, and the risk of the scaffold system may collapse. The wire fasteners of the present invention can be adjusted so that the wire rope fastening clips further tighten the wire rope when a load is applied to the scaffold system supporting the wire rope.

Also, looking more closely at <c>, the fixing clip can move in the direction of tightening the outside of the wire rope, and the wire rope can be moved in the upward direction, so that the wire can be fixed despite the increased load.

According to one embodiment, the wire fastener is according to another embodiment, wherein the wire fastener comprises a longitudinal bore extending through the wire fastener, a first vise plate having two first recesses, And a second vise plate having two second recesses, wherein when the first vise plate and the second vise plate are in contact with each other at the clamping position, And each of the second recesses is positioned adjacent to a corresponding one of the first recesses, and the first and second vise plates are in a clamping position The first and second inserting portions are provided with the first inserting portion and the second inserting portion adjacent to the first and second fixing element receiving portions, A first clamp assembly extending outwardly from the corresponding one of the first and second stationary element receiving portions and extending along the channel axis, the channel axis of the first and second insert portions being angled with respect to the longitudinal axis, A second clamp assembly having a third receiving portion and a fourth receiving portion each configured to receive an element therein and a shaft positioned through the longitudinal bore and connecting the first clamp assembly and the second clamp assembly, . &Lt; / RTI &gt;

5 is a flowchart illustrating a method of dismantling a wire rope-type scaffolding system dedicated to a boiler according to an embodiment of the present invention.

According to one embodiment, a method for dismantling a wire rope-type scaffolding system dedicated to a boiler may include a load distributing device separating process (S510), a nose separating process (S520), a pendant furnace interior scraper separating process (S530) The upper and lower support platform separating process S570, the lifting wire separating process S580, and the loop tube removing process S550, the upper and lower support platforms separating process S570, the pendant in-door scraper repeating and separating process S550, S590).

According to one embodiment, the load distributor separation process (S510) may separate the wire rope for load distribution from the top of the loop tube.

According to one embodiment, in the nose portion separating step (S520), the wire rope of the nose portion is removed to separate the wire rope for load distribution, and the shakele attached to the fixing lug of the nose portion is separated to remove the wire rope for load distribution .

According to one embodiment, the pendant in-pipe scraper device separating process (S530) separates the handrail, the footrest, the work platform, and the cross bar installed at the 0th stage of the boiler, The inner wall brace can be removed.

According to one embodiment, the pendant in-pipe scraper device separation process (S540) can lift the pendant scaffold in the pre-installed position by using a hydraulic lifting device.

According to one embodiment, the pendant in-bed scraper device repeated separation process (S550) is repeated until the remaining platform is completely disassembled so that the pendant in-bed scraper device separation process and the pendant in-bed scraper device descent process are located on the upper and lower support platforms at the first stage of the boiler It can be repeated.

According to one embodiment, the upper and lower support platform lowering process (S560) may lower the upper and lower support platforms located at the first stage of the boiler to the zero stage of the boiler.

In one embodiment, the upper and lower support platform separation process (S570) includes removing a platform drum support included in the upper and lower support platforms to separate a plurality of platform lines, connecting the platform frame, platform to platform, You can remove the wire rope by removing one connecting pin and removing the lift anchor holder.

According to one embodiment, the lifting wire separation process (S580) can separate the lifting wire from the hydraulic lifting device. At this time, the lifting wire separation step (S580) includes a hydraulic unit for controlling the hydraulic lifting device, a hydraulic cylinder for lifting the lifting wire, a pulley for lifting the lifting wire including the lifting wire rope, and a drum for winding the winding It can be a process of separating from a cargo heavy girder. Or the platform safety footrest installed on the top of the plurality of platform lines using the scaffold steel pipe is disassembled and the platform frame selected on the plurality of platform lines is disassembled in the wire rope using the platform connecting lug, It is possible to separate the lifting wire. Alternatively, in the wire pulling process for lifting, when the load greater than a predetermined load threshold value is applied, the wire rope is tightened to the outside of the wire rope, or when a load less than a predetermined load threshold value is applied, And the outer side of the rope is loosened.

According to one embodiment, the loop tube removal process (S590) may remove a loop tube including holes for lifting at the bottom of the girder.

FIG. 6 is a flowchart illustrating a procedure for separating a pendant in-door scraper according to an exemplary embodiment of the present invention.

According to one embodiment, in the pendant furnace interior scraper device separation process, the attachment of the pendant interior scraper can be removed in the order of removing the handrail, removing scaffold internal moving stairs, removing the scaffold, and removing the crosspiece.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined only by the appended claims.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein. It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

1: Heavy girder 2: Hydraulic lifting device
3: Loop tube 4: Lifting wire
5: upper and lower trust structure Platform 6: nose coupling system
7: Pendant in-floor scaffold system 8: Critical load notification system

Claims (4)

A method for dismantling a wire rope-type scaffolding system dedicated to a boiler installed using a hydraulic lifting device, an upper and lower support platform, and a pendant furnace scraper,
A load dispersing device separating step of separating the wire rope for load distribution from the upper part of the loop tube;
A nose separating step of separating the wire rope of the load distribution by removing the wire clip of the nose portion and separating the shackle provided in the fixing lug of the nose portion to remove the load rope for load distribution;
A pendant in-door scraper detachment process for separating a wire rope and a guide rail from each other after removing a handrail, a footstock, a footstep, a footrest, and a cross bar installed at the 0th stage of the pendant in-
A step of separating the pendant in-bed scraper from the pre-installed position using the hydraulic lifting device;
The pendant in-door scraper device separating process and the pendant in-door scraper device descending process are repeated until the remaining platform is completely disassembled so that the first and second stages of the boiler are positioned on the upper and lower support platforms;
A lower support platform lowering step of lowering the upper and lower support platforms located at one end of the boiler to the zero end of the boiler;
Removing a platform drum support included in the upper and lower support platforms to separate a plurality of platform lines, removing a connection pin connecting the platform frame, the platform to the platform and the platform connection drum of the platform line, and removing the lift anchor holder An upper and lower support platform removal process for removing the wire rope;
A lifting wire separating step of separating the lifting wire from the hydraulic lifting device;
And a loop tube removing step of removing a loop tube including a hole for lifting at the bottom of the heavy girder,
In the pendant furnace interior scraping device separating process,
Removing the attachment of the pendant in-door scraper in the order of removal of the hand rail, removal of the scaffold internal moving stair, removal of the operation scaffold and removal of the cross member,
In the lifting wire separation step,
And when a load less than a predetermined load threshold is applied, the outer side of the wire rope is released using a wire fastener,
The lifting wire separation step
A hydraulic unit for controlling the hydraulic lifting device, a hydraulic cylinder for lifting the lifting wire, a pulley for lifting the lifting wire including the lifting wire rope, and a drum for winding the wire are sequentially separated from the heavy girder; or
Disassembling the platform safety footrest installed on the top of the plurality of platform lines using the scaffold steel pipe and disassembling the selected platform frame in the plurality of platform lines using a platform connection lug in the wire rope, Characterized in that it comprises a step of separating the lifting wire caught by the pulley.
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