JP2018087464A - Scaffold system in furnace for boiler maintenance and its construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scaffold system in a furnace for boiler maintenance and its construction method by installing the scaffold in the furnace for boiler maintenance using a raising platform, so that the upper and lower part load of the scaffold in the furnace for boiler maintenance is distributed, and the danger of collapse can be prevented, and the safety of the scaffold in the furnace can be increased.SOLUTION: The scaffold system in a furnace for boiler maintenance of the presented invention includes a scaffold in the furnace which is installed so that a plurality of stages are made to an inner side face of the boiler, a raising platform which, as a matrix shape, supports the scaffold in the furnace with a plurality of raising wire ropes, and a raising equipment which is installed at the heavy girder part of the boiler and raises and supports the raising platform with a plurality of strands and a plurality of wire ropes which are drawn inside of the boiler.SELECTED DRAWING: Figure 1a

Description

By installing the boiler maintenance furnace scaffold using a lifting platform, the present invention can disperse the loads on the upper and lower parts of the boiler maintenance furnace scaffold to prevent the risk of collapse, The present invention relates to an in-furnace scaffolding system for boiler maintenance that can improve the safety of the scaffolding and its construction method.

As is well known, a thermal power plant is one that generates power by rotating a turbine with high-pressure steam generated from a boiler, and must regularly perform inspection work and maintenance work. After installing the work platform using the scaffolding for such inspection work and maintenance work, the worker inspected and maintained the boiler while moving the work work installed, and when the work was completed, it was installed The process of dismantling the workbench and scaffolding can be performed.

In connection with the above-described scaffold, a vertical tube working in-core wire scaffold is disclosed. This kind of scaffold is composed of structural members such as a frame, a side coupling member, a length coupling member, and the like. In the event of a sudden emergency such as a tube rupture or perforation, it has the advantage that it can be easily moved into the furnace through the manhole of a thermal power plant boiler of limited size.

Such a vertical tube working wire scaffold is excellent in accessibility to the inside of the boiler, but multiple workers cannot work at the same time, and the height of the boiler reaches several tens of meters. When the work place is located at a high place, a plurality of frames must be connected in the length direction using a length connecting member, so that the safety of the work, the durability of the scaffolding, etc. are significantly reduced. is there.

Furthermore, the internal inspection and working scaffolds for large boilers for power plants have a very high installation height of approximately 50m, etc., and the scaffold system that is built up from the bottom may collapse due to load concentration at the lower end due to the structure. There is a problem that is high.

Korean Registered Patent No. 10-126282 Korean Registered Patent No. 10-128744

Therefore, the present invention can prevent the risk of collapse by dispersing the load on the upper and lower parts of the boiler maintenance furnace scaffold by installing the boiler maintenance furnace scaffold using the lifting platform, An object of the present invention is to provide an in-furnace scaffolding system for boiler maintenance, and a construction method thereof, which can improve the safety of the in-furnace scaffolding.

The present invention also provides a lifting device provided on a heavy guarder of a boiler, and lifts a matrix-like lifting platform via a plurality of strands and a plurality of supporting wire ropes drawn into the boiler. Work using the in-furnace scaffolding for boiler maintenance by supporting the in-furnace scaffolding installed in multiple stages on the inner side of the boiler with multiple lifting wire ropes supported and mounted on the lifting platform It is an object of the present invention to provide a boiler maintenance in-furnace scaffolding system and its construction method that can improve the safety of the scaffold and improve the durability of the scaffolding.

The purpose of the embodiments of the present invention is not limited to the above-described object, and other objects not described above will be clearly understood by those having ordinary knowledge in the technical field to which the present invention belongs from the following description.

According to an aspect of the present invention, an in-furnace scaffold that is installed in a plurality of stages on the inner side surface of the boiler, and a matrix, and supports the in-furnace scaffold via a plurality of lifting wire ropes. A lifting platform and a lifting platform provided on a heavy guarder of the boiler and lifting and supporting the lifting platform via a plurality of strands and a plurality of support wire ropes drawn into the boiler. An in-furnace scaffolding system for boiler maintenance is provided.

According to another aspect of the present invention, installing a plurality of lifting devices on a heavy guarder of the boiler, and drawing a plurality of strands connected to the lifting devices into the boiler. And lowering, fabricating the lifting platform in a matrix, coupling the fabricated lifting platform to each other via a plurality of support wire ropes connected to the plurality of strands, and the lifting platform Connecting a plurality of lifting wire ropes to a lower portion of the furnace, and after raising the lifting platform by a predetermined height, installing an in-furnace scaffolding connected to the plurality of lifting wire ropes on an inner side of the boiler But like multiple stages Comprising a step of repeating installation, the construction method of the furnace scaffolding system boiler maintenance is provided.

By installing the boiler maintenance furnace scaffold using a lifting platform, the present invention can disperse the loads on the upper and lower parts of the boiler maintenance furnace scaffold to prevent the risk of collapse, The safety of the scaffold can be improved.

The present invention also provides a lifting device provided on a heavy guarder of a boiler, and lifts a matrix-like lifting platform via a plurality of strands and a plurality of supporting wire ropes drawn into the boiler. Work using the in-furnace scaffolding for boiler maintenance by supporting the in-furnace scaffolding installed in multiple stages on the inner side of the boiler with multiple lifting wire ropes supported and mounted on the lifting platform The safety of the scaffold can be improved and the durability of the scaffold can be improved.

It is a figure which illustrates the boiler maintenance furnace scaffold system which concerns on one Embodiment of this invention. It is a figure which illustrates the lifting device of the boiler maintenance furnace scaffold system which concerns on one Embodiment of this invention. It is a figure which illustrates the lifting platform of the boiler maintenance furnace scaffold system which concerns on one Embodiment of this invention. It is a figure which illustrates the in-furnace scaffold of the in-furnace scaffold system for boiler maintenance which concerns on one Embodiment of this invention. It is a flowchart according to the stage which shows the process of constructing the boiler maintenance furnace scaffold system which concerns on other embodiment of this invention. It is a figure which shows the construction process which applied the hydraulic lifting apparatus by other embodiment of this invention. It is a figure which shows the construction process which applied the winch type lifting apparatus by other embodiment of this invention.

Advantages, features, and methods of accomplishing the embodiments of the present invention will be apparent with reference to the examples described in detail below in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and can be implemented in various different forms. However, this embodiment is provided in order to complete the disclosure of the present invention and to fully inform the person who has ordinary knowledge in the technical field to which the present invention belongs to the scope of the invention. The invention is defined solely by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In describing embodiments of the present invention, when it is determined that a specific description of a known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description is omitted. To do. The terms described later are terms defined in consideration of the functions in the embodiments of the present invention, and this may vary depending on the intention or custom of the user or operator. Therefore, the definition should be made based on the contents throughout this specification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1a and 1b illustrate a boiler maintenance furnace scaffolding system according to an embodiment of the present invention, and FIGS. 2a to 2e illustrate a boiler maintenance furnace scaffolding system according to an embodiment of the present invention. FIGS. 3a to 3i are diagrams illustrating a lifting platform of a boiler maintenance furnace scaffolding system according to an embodiment of the present invention, and FIGS. 4a to 4h are boiler maintenance according to an embodiment of the present invention. It is a figure which illustrates the in-furnace scaffold of the in-furnace scaffold system.

Referring to FIGS. 1a and 1b, FIGS. 2a to 2e, FIGS. 3a to 3i, and FIGS. 4a to 4h, a boiler maintenance in-furnace scaffold system according to an embodiment of the present invention includes a lifting device 100, a lifting device. A platform 200, an in-furnace scaffold 300, and the like may be included.

The lifting device 100 is provided in the heavy girder portion 30 of the boiler 10 and lifts and supports the lifting platform 200 via a plurality of strands 110 and a plurality of support wire ropes 120 drawn into the boiler 10. The girder unit 30 may be provided with a hydraulic system 130 or a winch system 140.

For example, in the case of the hydraulic system 130, a strand winder 131 for winding the strand 110 is provided, a strand guide 133 for guiding the strand 110 to be wound is provided, and a hydraulic unit 135 and a hydraulic lift for moving the strand 110 up and down. A mechanism 137 is provided, and a plurality of these components may be provided as many as the number of strands 110.

In the case of the winch method 140, a winch drum 141 and a winch motor 143 for moving the strand 110 up and down are provided, and a plurality of these components may be provided as many as the number of the strands 110.

On the other hand, the plurality of support wire ropes 120 respectively coupled to the plurality of strands 110 are respectively connected by a plurality of anchor holders 150. The anchor holder 150 has a holder side plate 151a and a holder support plate 151b. The holder main body 151 coupled to each other, the support weight 152 that supports the strand 110 coupled through the holder support plate 151b at the lower part of the holder support plate 151b, and the lower end of the holder side plate 151a are coupled through and supported. A rope fastening rod 153 and the like that are fastened to the wire rope 120 may be included.

Here, the holder side plates 151a are arranged on both sides in a state of being spaced apart at a constant interval, and one holder support plate 151b is coupled to the inside of the upper end of the holder side plate 151a. Although the holder support plate 151b can be coupled, the upper holder support plate 151b may be provided with a through hole through which the strand 110 is coupled, and the lower holder support plate 151b is penetrated through which the support weight 152 is coupled. A hole may be provided.

As a result, the support weight 152 is supported by the lower portion of the upper holder support plate 151b after passing through the lower holder support plate 151b and moving upward with the strand 110 coupled and fixed at the upper end. Can be combined. Here, the strand 110 can be coupled through the upper and lower portions of the support weight 152.

The plurality of strands 110 and the plurality of support wire ropes 120 can be firmly and stably fastened and connected via the plurality of anchor holders 150.

The lifting platform 200 is provided in a matrix and supports the in-furnace scaffold 300 via a plurality of lifting wire ropes. A plurality of supporting wire ropes 120 are attached to a plurality of anchor holders 150 to which a plurality of strands 110 are respectively coupled. While the one ends of the support wire rope 120 are fastened, the lifting wire 100 can be connected to the lifting device 100 by a plurality of connection lugs 210 fastened to the other ends of the support wire rope 120.

Here, the plurality of connection lugs 210 include a U-shaped frame mounting opening 211 on which the upper horizontal frames constituting the plurality of horizontal frames 221 and the plurality of vertical frames 222 of the first rectangular platform unit 220 are mounted and supported, the frame The other end of the plurality of support wire ropes 120 that are through-coupled to the through holes of the two wire lug pieces 212 and the two wire lug pieces 212 that are provided on the both outer sides of the mounting port 211 so as to have a certain distance from the through holes. Two wire fastening rods 213 that are fastened to each other, two fixed covers 214 that are provided so that both ends thereof are through-coupled to the wire fastening rods 213 and have a certain interval, and through-coupling to through holes provided in the fixed cover 214 The connecting rod 215 may be included.

By connecting the other end of the support wire rope 120 via the two wire fastening rods 213 provided in the plurality of connection lugs 210, the loads of the lifting platform 200 and the in-furnace scaffold 300 can be dispersed. .

In the lifting platform 200 as described above, a first rectangular platform unit 220 having a relatively wide width and a second rectangular platform unit 230 having a relatively smaller width than the first rectangular platform unit 220 are combined in a matrix. However, a plurality of second quadrangular platform units 230 may be disposed outside the plurality of first quadrangular platform units 220.

Here, the first quadrangular platform unit 220 includes a plurality of horizontal frames 221 and a plurality of vertical frames 222 arranged so as to have a quadrangular matrix shape, and the horizontal frame 221 and the vertical frame 222 each have two horizontal frames. A plurality of vertical frames may be combined between the frames, and a diagonal frame is provided as an internal diagonal line of a rectangular space formed by the horizontal frame and the vertical frame, so that the frame can be firmly and stably combined. .

In addition, the first rectangular platform unit 220 includes a plurality of first frame connecting drums 223 in each connecting portion for a firm and stable connection between the plurality of horizontal frames 221 and the plurality of vertical frames 222, respectively. A plurality of first diagonal support frames 224 may be provided between the first frame connecting drums 223 located on the respective diagonal lines.

A connecting drum cradle 223a is coupled to the lower portion of the first frame connecting drum 223 and can be installed in a solid structure. The first diagonal support frame 224 has a zigzag arrangement from one quadrangle to an adjacent quadrangle. Thus, the first square platform unit 220 can be supported and coupled firmly and stably.

The second quadrangular platform unit 230 is coupled to the outer side of the first quadrangular platform unit 220 having a quadrangular matrix shape, and a plurality of extension frames 231 provided in the outer direction are connected to the plurality of extension frames 231. The plurality of extension frames 231 and the plurality of connection frames 232 may include a plurality of vertical frames coupled to each other between two horizontal frames. The horizontal frame and the vertical frame may be provided. Since a diagonal frame is provided as an internal diagonal line of the rectangular space formed by, a firm and stable connection can be achieved.

The second rectangular platform unit 230 is provided with a plurality of second frame connecting drums 233 at the outer connecting portions in order to firmly and stably connect the plurality of extension frames 231 and the plurality of connecting frames 232. A plurality of second diagonal support frames 234 may be provided between the second frame connection drum 233 and the first frame connection drum 223 located on each diagonal line.

The second diagonal support frame 234 is provided in a zigzag arrangement from one quadrangle to an adjacent quadrangle, so that the second quadrangle platform unit 230 can be supported and coupled firmly and stably. it can.

On the other hand, the lifting platform 200 is separated into at least one row and at least one row, or at least one column and at least one column in a matrix, but the height of the in-core scaffold 300 is determined according to the separated form. Can be provided differently.

For example, when the entire structure of the lifting platform 200 is provided in a 5 × 5 matrix, the first square platform unit 220 includes a 3 × 5 matrix 1-1 first square platform unit and a 2 × 5 matrix first. The second quadrangular platform unit 230 may be provided on the exterior of each of the first-first quadrangular platform unit and the first-second quadrangular platform unit, while being provided separately in the 1-2 quadrangular platform unit.

The lifting platform 200 in the separated form may be provided to have a different step height, but the 3 × 5 matrix-shaped first-first quadrangular platform unit and a second quadrangular platform unit provided outside thereof. 230, and separately install the first and second quadrangular platform units and the second quadrangular platform unit 230 provided outside the first quadrangular platform unit. When it is first raised and then raised by a predetermined height, it can be constructed in such a manner that the in-furnace scaffold 300 is installed not only at the lower part of one platform structure but also at the lower part of another platform structure.

Here, when the in-furnace scaffold 300 is installed at the lower part of one platform structure and the lower part of another platform structure, the entire stage is installed so as to be interconnected. The process of raising after installing can be repeated.

On the other hand, the lifting platform 200 has a platform scaffolding plate on the upper part thereof so that the operator can perform various operations (for example, installation of a wall support base, installation of a maintenance scaffold, etc.) while moving on the upper part of the platform. A plurality of 240 are provided.

The platform scaffolding plate 240 is disposed on top of a plurality of support pipes 240a arranged for supporting the scaffolding plate on the tops of the first square platform unit 220 and the second square platform unit 230. And a plurality of coupling rings 242 provided at both ends of the plate 241 for coupling to the top of the first square platform unit 220 or the second square platform unit 230.

The lifting platform 200 is provided with a wall support 250 so as to be supported by a lower end of a nose 50 formed in the boiler 10, and the wall support 250 is a first rectangular platform. A lower fixing frame 251 coupled and fixed to the upper part of the unit 220 or the second rectangular platform unit 230, an upper fixing frame 252 fixed to an inclined side surface of the lower end portion of the nose part 50, a lower fixing frame 251 and an upper fixing frame A plurality of vertical support frames 253 that mutually support 252 may be included.

Such a wall support 250 can be installed after the lifting platform 200 has been raised to the lower end of the nose 50, and the lifting platform 200 can be firmly fixed to the lower end of the nose 50 having a side surface inclined inward. it can.

In addition, the lifting platform 200 is provided with a maintenance scaffold 260 for maintaining the vertical tube of the boiler 10 at the upper part. The maintenance scaffold 260 is fixed to the inner surface of the boiler 10. A frame 261, a second vertical fixing frame 262 fixedly supported on the upper part of the first rectangular platform unit 220 or the second rectangular platform unit 230, an upper part of the first vertical fixing frame 261, and an upper part of the second vertical fixing frame 262. A horizontal support frame 263 for connecting and supporting the frames may be included.

Using such a maintenance scaffold 260, the vertical tube can be maintained while being stably supported on the inner surface of the boiler 10.

The in-furnace scaffold 300 is installed on the inner side surface of the boiler 10 so as to have a plurality of steps, and a plurality of lifting wire ropes 320 fixed by a plurality of fastening lugs 310 coupled to the lower part of the lifting platform 200 are provided. It can be provided to extend downward.

Here, the plurality of fastening lugs 310 are provided with an H-shaped lug main body 311 and a platform fixing rod provided through the upper end of the lug main body 311 and coupled to the lower end structure of the lifting platform 200 mounted on the inside. 312 and a wire fastening rod 313 provided through the lower end of the lug body 311 to which the lifting wire rope 320 is fastened, so that the plurality of lifting wire ropes 320 are firmly coupled to the lower portion of the lifting platform 200. Can be made.

Further, the in-furnace scaffold 300 includes an outer crossbar 333 parallel to the inner side surface of the boiler 10, with each stage having an outer crossbar fixing flange 331 and an inner crossbar fixing flange 332 spaced apart from the outer crossbar fixing flange 331. In addition, the work platform plate 336 may be provided on the scaffold plate fixing base 335 that fastens the inner crossbar 334 and vertically connects the outer crossbar fixing flange 331 and the inner crossbar fixing flange 332.

The outer crossbar fixing flange 331 and the inner crossbar fixing flange 332 pass through the upper and lower portions, and a plurality of lifting wire ropes 320 are fixedly coupled to the outer crossbar 333, the inner crossbar 334, and the scaffold plate. The fixing base 335 can be fixed by a plurality of fixing pins 337, respectively.

Here, the outer crossbar fixing flange 331 and the inner crossbar fixing flange 332 are provided with a central fixing hole in the central portion that can be fixed with the lifting wire rope 320 inserted through the upper and lower portions. The fixing pin 337 is inserted and fixed in a state where the outer cross bar 333, the inner cross bar 334 and the scaffolding plate fixing base 335 are connected to the outer side to which the bar 333, the inner cross bar 334 and the scaffolding fixing base 335 are connected. A possible outer fixing hole may be provided.

Further, the work scaffold plate 336 is provided with a plurality of coupling rings on the side surfaces in the length direction so that the work scaffold plate 336 can be stably mounted and coupled between the scaffold plate fixed bases 335, so that the work scaffold plate 336 is attached to the scaffold plate fixed base. 335 can be installed firmly.

Each stage of the in-furnace scaffold 300 is provided with a corner scaffolding plate 338 at each corner, and the corner scaffolding plate 338 is horizontally supported by interconnecting inner cross bars 334 adjacent to both sides of the corner scaffolding plate 338. A support base 339 may be provided.

The corner scaffolding plate 338 is provided in a triangular shape corresponding to each corner, and is firmly fixed to the adjacent scaffolding plate fixing base 335 by a plurality of fastening rings and a plurality of fixing clamps provided on both sides. can do.

Meanwhile, each stage of the in-furnace scaffold 300 may be provided with at least one handrail 340 horizontally connecting the plurality of lifting wire ropes 320 on the outer side and the inner side.

Here, the handrail 340 includes an end fastener and a fastening pin that connect (or fasten) between the two lifting wire ropes 320 inserted into the outer crossbar fixing flange 331 or the inner crossbar fixing flange 332. Can be fastened and fixed stably to the lifting wire rope 320. Therefore, it is possible to prevent the worker from falling into the inner space of the scaffold.

The in-furnace scaffold 300 includes a plurality of magnetic support bases 341 having one end fixed to the outer cross bar 333 and the other end in close contact with the inner surface of the boiler 10, and a moving staircase 342 that connects each stage of the in-furnace scaffold 300. Can be provided.

In order to improve the supporting force between the in-furnace scaffold 300 and the inner surface of the boiler 10, at least two such magnetic support bases 341 can be installed on each of the four sides of each stage, and one end is an outer cross of the installation position. It is fixed to the bar 333 and the other end can be in close contact with the inner surface of the installation position.

Of course, while being lifted by the lifting platform 200, the magnetic support base 341 can be tightly fixed to the installation position in a state where all the steps of the in-furnace scaffold 300 are installed.

In the above-described boiler maintenance furnace scaffolding system, after the load distribution structure is installed on the upper part of the loop tube of the boiler 10, the load distribution wire rope is drawn into and lowered from the boiler 10, and then the lifting platform 200. By connecting with the turnbuckle fixedly coupled to the upper portion of the wing, the loads of the lifting platform 200 and the in-furnace scaffold 300 can be effectively dispersed.

Therefore, the present invention can prevent the risk of collapse by distributing the load on the upper and lower parts of the boiler maintenance furnace scaffold by installing the boiler maintenance furnace scaffold using the lifting platform. The safety of the inner scaffold can be improved.

Further, the present invention provides a lifting device provided in a heavy girder portion of a boiler, which lifts and supports a matrix-like lifting platform via a plurality of strands and a plurality of supporting wire ropes that are drawn into the boiler. Supporting the in-furnace scaffold that is installed in multiple stages on the inner side of the boiler with multiple lifting wire ropes provided on the platform, to improve the safety of work using the in-furnace scaffold for boiler maintenance It can be improved, and the durability of the scaffold can be improved.

Next, in the in-furnace scaffolding system for boiler maintenance having the above-described configuration, a plurality of lifting devices are installed on the heavy girder portion of the boiler, and a plurality of strands connected to the lifting device are drawn into and lowered from the boiler. After that, the lifting platform is manufactured in a matrix, and the manufactured lifting platform is connected via a plurality of support wire ropes connected to a plurality of strands, and a plurality of lifting wire ropes are connected to the lower part of the lifting platform. In this state, after raising the lifting platform by a predetermined height, an in-furnace scaffolding connected to multiple lifting wire ropes is installed on the inner side of the boiler, but it is repeatedly installed in multiple steps. The process of performing will be described in detail.

FIG. 5 is a step-by-step flowchart showing a process for constructing a boiler maintenance furnace scaffolding system according to another embodiment of the present invention, and FIGS. 6a to 6i are applied with a hydraulic lifting device according to another embodiment of the present invention. FIGS. 7a to 7g are diagrams showing a construction process in which a winch type lifting device is applied according to another embodiment of the present invention.

Referring to FIGS. 5, 6a to 6i, and FIGS. 7a to 7g, a plurality of lifting devices 100 may be installed on the heavy girder portion 30 of the boiler 10 (step 502).

Here, the lifting device 100 may be provided in the heavy girder unit 30 by a hydraulic system 130 or a winch system 140. In the case of the hydraulic system 130, as shown in FIG. 6a, a strand winder in which the strand 110 is wound up. 131, a strand guide 133 that guides the strand 110 to be wound, and a hydraulic unit 135 that raises and lowers the strand 110 and a hydraulic lift mechanism 137 may be provided. A plurality of these components may be provided as many as the number of strands 110.

Further, in the case of the winch method 140, as shown in FIG. 7a, a winch drum 141 and a winch motor 143 for raising and lowering the strand 110 are provided, and a plurality of these components may be provided as many as the number of the strands 110.

The plurality of strands connected to the lifting device 100 can then be drawn into and lowered into the boiler 10 (step 504).

For example, after the lifting device 100 of the hydraulic system 130 as shown in FIG. 6a is installed in the heavy girder part 30, a plurality of strands 110 are drawn into the boiler 10 as shown in FIGS. 6b, 6c, and 7b. It can be lowered and lowered to the bottom.

Thereafter, the lifting platform 200 can be fabricated in a matrix on the inner bottom surface of the boiler 10 (step 506).

For example, the lifting platform 200 of FIGS. 6B and 6C includes a first rectangular platform unit 220 having a relatively wide width and a second rectangular platform unit 230 having a relatively smaller width than the first rectangular platform unit 220. (For example, 5 × 5).

Further, the lifting platform 200 is separated into at least one row and at least one row, or at least one column and at least one column in a matrix, but the height of the in-furnace scaffold 300 is determined according to the separated form. However, if the entire structure of the lifting platform 200 is provided in a 5 × 5 matrix, the first square platform unit 220 may be combined with a 3 × 5 matrix 1-1 first square platform unit and 2 A second quadrangular platform unit 230 is provided outside each of the first-first quadrangular platform unit and the first-second quadrangular platform unit while being provided in a state of being separated into a × 5 matrix-shaped first-fourth quadrangular platform unit. Can be.

Further, the lifting platform 200 may be provided with a plurality of platform scaffolding plates 240 on the top thereof.

The lifting platform 200 produced in step 506 may be coupled by a plurality of support wire ropes 120 connected to a plurality of strands 110 (step 508).

For example, as shown in FIG. 6e, the lifting platform 200 is configured such that each end of the plurality of support wire ropes 120 is fastened to a plurality of anchor holders 150 to which a plurality of strands 110 are respectively coupled. It can be connected to the lifting device 100 by a plurality of connecting lugs 210 fastened to the ends.

By connecting the other end of the support wire rope 120 via the two wire fastening rods 213 provided in the plurality of connection lugs 210, the loads of the lifting platform 200 and the in-furnace scaffold 300 can be dispersed. .

A plurality of lifting wire ropes 320 may then be coupled to the lower portion of the lifting platform 200 (step 510).

For example, as shown in FIG. 6e, a plurality of lifting wire ropes 320 are fixed to be extended downward by a plurality of fastening lugs 310 coupled to the lower portion of the lifting platform 200, thereby being attached to the lower portion of the lifting platform 200. A plurality of lifting wire ropes 320 can be firmly coupled.

Next, after raising the lifting platform 200 by a predetermined height (for example, the height of the first stage of the in-furnace scaffold 300, the height of the second stage, the height of the nose portion 50, etc.), a plurality of lifting platforms 200 are placed on the inner side surface of the boiler 10. The in-furnace scaffolding 300 connected to the lifting wire rope 320 is installed repeatedly, and can be repeatedly installed to form a plurality of steps (step 512).

For example, the in-furnace scaffold 300 includes an outer crossbar 333, an inner crossbar 334, a scaffold to an outer crossbar fixing flange 331 and an inner crossbar fixing flange 332 to which a plurality of lifting wire ropes 320 are fixedly coupled to each stage. A plate fixing base 335 and a work scaffolding plate 336 can be installed, and a corner scaffolding plate 338 can be installed at each corner. In order to prevent an operator from falling into the inner space of the scaffolding, a plurality of lifting wire ropes 320 are horizontally disposed. At least one handrail 340 may be provided on the outer side and the inner side.

In addition, the in-furnace scaffold 300 can be provided with a plurality of magnetic support bases 341 having one end fixed to the outer crossbar 333 and the other end in close contact with the inner surface of the boiler 10. A moving staircase 342 to be connected can be provided.

On the other hand, the process of repeatedly installing the in-furnace scaffold 300 so as to form a plurality of stages is different between when the lifting device 100 is installed by the hydraulic method 130 and when the lifting device is installed by the winch method 140. I take the.

For example, as shown in FIGS. 6e to 6i, when the lifting device 100 is installed in the heavy girder unit 30 by the hydraulic system 130, the lifting platform 200 is set to the height of the first stage of the furnace scaffold 300, the height of the second stage, or the like. Can be repeatedly installed so as to form a plurality of steps from the upper end to the lower end adjacent to the lifting platform 200, the nose portion formed inside the boiler 10 during such repeated installation. In order to maintain the vertical tube of the boiler 10 at the upper part, the wall surface support 250 is installed to be supported by the lower end part of the nose part 50 formed inside the boiler 10 when installed to the lower end part of the boiler 10. The maintenance scaffold 260 can be further installed.

7c to 7g, when the lifting device 100 is installed in the heavy girder 30 by the winch method 140, the lifting platform 200 is raised to the height of the nose portion 50, and then the in-furnace scaffold 300 is used. Can be repeatedly installed so as to form a plurality of steps from the lower end to the upper end.

Here, in a state where the lifting platform 200 is raised to the height of the nose portion 50, the wall surface support 250 is installed so as to be supported by the lower end portion of the nose portion 50 formed inside the boiler 10, and the in-furnace scaffold 30 When the installation of is completed, a maintenance scaffold 260 for maintaining the vertical tube of the boiler 10 can be installed on the upper part of the lifting platform 200.

In the step 512 as described above, the lifting platform 200 can be installed in a plurality of stages. However, in the lifting platform 200 having a 5 × 5 matrix structure, the first square platform unit 220 is 3 ×. When installing in a state where it is separated into five matrix-shaped first-first quadrangular platform units and 2 × 5 matrix-shaped first-second quadrangular platform units, A second quadrangular platform unit 230 may be provided on the outside of each of the two quadrangular platform units, but a 3 × 5 matrix 1-1 first quadrangular platform unit and a second quadrangular platform unit 230 provided on the outside thereof are installed. 1-2 The square platform unit and the second square platform unit 230 provided in the outside can be placed separately.

Next, in the hydraulic system 130, a below-mentioned furnace scaffold 300 is first installed at the lower part of one platform structure to be installed higher, and then raised, and when it is raised by a predetermined height, the lower part of one platform structure is installed. In addition, it can be constructed by a method of installing the in-furnace scaffold 300 under the other platform structure.

Here, when the in-furnace scaffold 300 is installed at the lower part of one platform structure and the lower part of another platform structure, the entire stage is installed so as to be interconnected. It can be constructed by repeatedly performing the process of raising after installing.

On the other hand, in the winch method 140, it is possible to install and construct each stage of the in-furnace scaffold 300 as described above after being raised so that the stage heights are different from each other. It is.

Therefore, the present invention can prevent the risk of collapse by distributing the load on the upper and lower parts of the boiler maintenance furnace scaffold by installing the boiler maintenance furnace scaffold using the lifting platform. The safety of the inner scaffold can be improved.

Further, the present invention provides a lifting device provided in a heavy girder portion of a boiler, which lifts and supports a matrix-like lifting platform via a plurality of strands and a plurality of supporting wire ropes that are drawn into the boiler. Supporting the in-furnace scaffold that is installed in multiple stages on the inner side of the boiler with multiple lifting wire ropes provided on the platform, to improve the safety of work using the in-furnace scaffold for boiler maintenance It can be improved, and the durability of the scaffold can be improved.

While various embodiments of the present invention have been presented and described above, the present invention is not necessarily limited thereto, and any person with ordinary knowledge in the technical field to which the present invention belongs can be used. It will be readily understood that various substitutions, modifications and changes can be made without departing from the technical idea of the present invention.

10 Boiler 30 Heavy girder part 50 Nose part 100 Lifting device 110 Multiple strands 120 Multiple support wire ropes 130 Hydraulic system 140 Winch system 150 Multiple anchor holders 200 Lifting platform 210 Multiple connection lugs 220 First rectangular platform unit 230 Second Square platform unit 240 Platform scaffolding plate 250 Wall support 260 Maintenance scaffold 300 In-furnace scaffold 310 Multiple fastening lugs 320 Multiple lifting wire ropes

Claims (28)

An in-furnace scaffold installed to form multiple steps on the inner side of the boiler;
A lifting platform provided in a matrix and supporting the in-furnace scaffold via a plurality of lifting wire ropes;
A lifting device provided in a heavy guarder of the boiler and lifting and supporting the lifting platform through a plurality of strands drawn into the boiler and a plurality of support wire ropes; A boiler scaffolding system for boiler maintenance. The lifting platform includes a plurality of anchor lugs that are fastened to the other ends of the support wire rope while fastening each end of the support wire rope to a plurality of anchor holders to which the plurality of strands are respectively coupled. The in-furnace scaffolding system for boiler maintenance according to claim 1, which is connected to a lifting device. In the lifting platform, a plurality of first rectangular platform units having a relatively wide width and a second rectangular platform unit having a relatively narrower width than the first rectangular platform unit are combined in the matrix. The boiler maintenance furnace scaffolding system according to claim 2, wherein a plurality of the second rectangular platform units are arranged outside the first rectangular platform unit. In the lifting platform, the matrix form is divided into at least one row and at least one row, or at least one column and at least one column. The boiler maintenance furnace scaffolding system according to claim 3, which is provided differently. The boiler maintenance furnace scaffolding system according to claim 4, wherein the lifting platform includes a plurality of platform scaffolding plates on an upper portion thereof. 5. The boiler maintenance furnace scaffolding system according to claim 4, wherein the lifting platform is provided with a wall surface support so as to be supported by a lower end of a nose formed inside the boiler. 6. The boiler maintenance furnace scaffolding system according to claim 4, wherein the lifting platform includes a maintenance scaffold for maintaining a vertical tube of the boiler at an upper portion thereof. The in-furnace scaffold has an outer crossbar and an inner crossbar parallel to the inner side surface of the boiler, each of which has an outer crossbar fixing flange and an inner crossbar fixing flange spaced apart from the outer crossbar fixing flange. 5. The boiler maintenance in-furnace scaffolding system according to claim 4, wherein a work scaffolding plate is provided on a scaffolding plate fixing base that is fastened and vertically connects the outer crossbar fixing flange and the inner crossbar fixing flange. The outer crossbar fixing flange and the inner crossbar fixing flange are vertically coupled to the lifting wire rope through the upper and lower portions, respectively, and the outer crossbar, inner crossbar and scaffolding plate fixing base are fixed pins, respectively. The boiler maintenance furnace scaffolding system according to claim 8, which is fixed. The in-furnace scaffold is provided with a corner scaffolding plate at each corner, and a corner support base that horizontally supports the corner scaffolding plate by interconnecting the inner crossbars adjacent to both sides of the corner scaffolding plate, The boiler maintenance furnace scaffolding system according to claim 9. The boiler in-furnace scaffolding system according to claim 10, wherein the in-furnace scaffold is provided with at least one handrail for horizontally interconnecting the lifting wire ropes on the outside and on the inside. The boiler internal scaffolding system for boiler maintenance according to claim 11, wherein the internal scaffold is provided with a plurality of magnetic support bases having one end fixed to the outer crossbar and the other end in close contact with the inner surface of the boiler. . The boiler in-furnace scaffolding system according to claim 12, wherein the in-furnace scaffold includes a moving staircase that connects the steps. 5. The boiler maintenance furnace scaffolding system according to claim 4, wherein the lifting device is provided in the heavy girder portion by a hydraulic method or a winch method. In the case of the hydraulic system, the lifting device includes a strand winder that winds the strand, a strand guide that guides the strand to be wound, and a hydraulic unit that moves the strand up and down by the hydraulic system. The boiler maintenance furnace scaffolding system according to claim 14, further comprising a hydraulic lift mechanism. The boiler lifting in-furnace scaffolding system according to claim 14, wherein, in the case of the winch method, the lifting device includes a winch drum and a winch motor for moving the strand up and down by the winch method. Installing a plurality of hoisting devices on the heavy guarder of the boiler;
Retracting and lowering a plurality of strands connected to the lifting device into the boiler;
Producing a lifting platform in a matrix,
Coupling the fabricated lifting platform to each other via a plurality of support wire ropes coupled to the plurality of strands;
Connecting a plurality of lifting wire ropes to a lower portion of the lifting platform;
After raising the lifting platform by a predetermined height, an in-furnace scaffold connected to the plurality of lifting wire ropes is repeatedly installed on the inner side surface of the boiler so that the in-furnace scaffold forms a plurality of steps. A method for constructing a boiler maintenance furnace scaffolding system comprising the steps of: Fastening to each other end of the support wire rope while fastening each end of the support wire rope to a plurality of anchor holders to which the plurality of strands are respectively joined in the step of joining via the plurality of support wire ropes The construction method of the in-furnace scaffold system for boiler maintenance according to claim 17, wherein the connection is made to the lifting device by a connected lug. In the step of manufacturing the lifting platform, a first rectangular platform unit having a relatively wide width and a second rectangular platform unit having a relatively smaller width than the first rectangular platform unit are combined in the matrix, 19. The construction method for a boiler maintenance in-furnace scaffold system according to claim 18, wherein a plurality of the second rectangular platform units are arranged outside the plurality of the first rectangular platform units. In the step of fabricating the lifting platform, the matrix-like form is separated into at least one row and at least one row, or at least one column and at least one column,
The boiler maintenance furnace according to claim 19, wherein in the step of repeatedly installing the plurality of steps, the stepped height of the in-furnace scaffold is set differently depending on the separated form of the lifting platform. Construction method of the scaffold system. When the lifting device is installed in the heavy girder section in a hydraulic manner, the boiler maintenance furnace scaffolding system is repeatedly installed so as to form the plurality of steps from the upper end to the lower end adjacent to the lifting platform. The stage to do is done,
In the step of repeatedly installing, when installed up to the lower end of the nose portion formed in the boiler, a wall support is installed to be supported by the lower end of the nose portion, and the upper part of the lifting platform The construction method of the boiler maintenance furnace scaffold system according to claim 20, wherein a maintenance scaffold for maintaining the vertical tube of the boiler is installed. In the construction method of the boiler maintenance furnace scaffolding system, when the lifting device is installed in a winch manner in the heavy girder, a step of repeatedly installing the plurality of steps from the lower end to the upper end is performed,
In the step of repeatedly installing, after raising to the lower end portion of the nose portion formed in the boiler, a wall support is installed to be supported by the lower end portion of the nose portion, and the upper part of the lifting platform The construction method of the boiler maintenance furnace scaffold system according to claim 20, wherein a maintenance scaffold for maintaining the vertical tube of the boiler is installed. In the step of repeatedly installing the plurality of steps, each step is parallel to the inner side surface of the boiler, respectively, to the outer crossbar fixing flange and the inner crossbar fixing flange spaced apart from the outer crossbar fixing flange. 21. The boiler according to claim 20, wherein an outer cross bar and an inner cross bar are fastened to each other, and a work scaffold plate is installed on a scaffold plate fixing base that vertically connects the outer cross bar fixing flange and the inner cross bar fixing flange. Construction method for maintenance furnace scaffolding system. In the step of repeatedly installing the plurality of steps, the lifting wire ropes are fixedly coupled to the upper portions of the outer crossbar fixing flange and the inner crossbar fixing flange, respectively. 24. The construction method of an in-furnace scaffolding system for boiler maintenance according to claim 23, wherein the scaffolding board fixing base and the scaffolding board fixing base are respectively fixed by fixing pins. In the step of repeatedly installing the plurality of steps, a corner scaffolding plate is installed at each corner, and the inner crossbar adjacent to both sides of the corner scaffolding plate is interconnected to support the corner scaffolding plate horizontally. The construction method of the in-furnace scaffolding system for boiler maintenance according to claim 24, wherein a corner support base is installed. 26. The in-furnace scaffold for boiler maintenance according to claim 25, wherein in the step of repeatedly installing the plurality of steps, at least one handrail for horizontally connecting the lifting wire ropes is installed on each of the outside and the inside. System construction method. 27. In the step of repeatedly installing the plurality of steps, a plurality of magnetic support bases, one end of which is fixed to the outer crossbar and the other end of which is in close contact with the inner surface of the boiler, are installed. To construct the in-furnace scaffolding system for boiler maintenance. 28. The construction method for a boiler maintenance in-furnace scaffolding system according to claim 27, wherein in the step of repeatedly installing the plurality of steps, a moving staircase for connecting the steps is installed.