A bottom support structure for a heat receiving surface tube panel and an erection method

Abstract

This invention discloses a U-shaped hanging plate for a base frame of a heated surface tube panel and an erection method thereof. The frame includes a main body with a hook at the top for attaching to the rooting tube at the bottom of the heated surface tube panel. The lower part of the main body has a downwardly extending vertical connecting section with a connecting structure for inserting load-bearing scaffolding pipes. When the hook is attached to the rooting tube, the vertical connecting section extends downward, so that the load-bearing scaffolding pipe passing through the connecting structure is located below the rooting tube, thus avoiding the self-clamping pipe at the bottom of the heated surface tube panel. The beneficial effects of this invention are: the rooting tube position remains unchanged, and the use of the U-shaped hanging plate causes the entire platform to shift downward, eliminating the influence of the self-clamping pipe on the steel scaffolding plank and allowing for better filling of gaps. The internal gaps of the U-shaped scraper are filled by the scaffolding pipes, significantly reducing the gaps in the platform.

Description

Technical Field

[0001] This invention relates to the field of boiler fault diagnosis and maintenance technology, and in particular to a chassis frame structure and erection method for a heated surface tube panel. Background Technology

[0002] Boilers in the power industry undergo regular maintenance every one to two years. Since the superheaters and reheaters are located directly above the water-cooled walls, an isolation scaffolding platform must be erected during maintenance to allow for simultaneous work from above and below, improving efficiency. Currently, the mainstream platform erection method in the industry mainly involves binding the scaffolding pipes to the superheater pipes with wire. Due to factors such as the superheater structure, steel planks need to be laid above the scaffolding pipes, making it impossible to completely shield the tube shielding anchor pipes. This results in noticeable holes and gaps at the tube shielding location, leading to poor isolation.

[0003] Construction above it can easily cause dust to fly up from below, affecting the welding quality of the heated surface and the health of the construction workers. Most importantly, there is always a potential risk of falling objects from heights due to the cross-operation, which poses a significant safety risk. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that, due to factors such as the structure of the superheater, the steel scaffolding needs to be laid above the scaffolding pipe, which makes it impossible to cover the rooting pipe of the pipe screen, leaving obvious holes and gaps at the pipe screen position, resulting in poor isolation effect.

[0005] The above-mentioned technical problems are solved by the following technical solution: The present invention proposes a chassis frame structure for a heated surface tube screen, which includes a body, the top of the body is provided with a hook part for hooking onto the rooting tube at the bottom of the heated surface tube screen, the lower part of the body is provided with a connecting section, and the connecting section is provided with a connecting structure for inserting load-bearing scaffolding tubes. When the hook is hung on the rooting tube, the connecting section extends downward, so that the load-bearing scaffolding pipe passing through the connecting structure is located below the rooting tube.

[0006] In a preferred embodiment of the chassis frame structure for the heated surface tube screen described in this invention: the main body is a U-shaped hanging plate, the hook part has a U-shaped opening structure, the width of the U-shaped opening structure is greater than or equal to the outer diameter of the rooting tube, and the internal space of the U-shaped opening structure is used to accommodate the rooting tube. The connecting structure on the connecting segment is a through hole, and the axis of the through hole is perpendicular to the plane where the U-shaped opening is located.

[0007] In a preferred embodiment of the chassis frame structure for the heated surface tube screen described in this invention: a locking mechanism is further provided on the connecting section, which is used to lock the load-bearing scaffold tube passing through the connecting structure to prevent the load-bearing scaffold tube from undergoing axial displacement within the connecting structure.

[0008] In a preferred embodiment of the chassis frame structure for the heated surface tube screen described in this invention: the width of the U-shaped hanging plate is 100mm~120mm, the length is 400mm~500mm, the thickness is not less than 6mm, and the diameter of the connecting structure is 50mm~60mm. The length of the U-shaped hanging plate is set according to the drooping height of the self-clamping pipe at the bottom of the heated surface tube panel, so as to adjust the elevation of the isolation scaffolding platform.

[0009] A chassis frame structure and erection method for a heated surface tube panel are also provided, characterized in that: the chassis frame structure for the heated surface tube panel includes the following steps: Step S1: Based on the outer diameter of the tubes of the heated surface tube panel, the diameter of the filling scaffold tubes, and the design elevation of the platform, process or select a body of appropriate size; Step S2: After the maintenance platform inside the furnace is set up, the operators use the maintenance platform to rise to the bottom of the heating surface tube screen and hang the hook part of the chassis frame of the main body for the heating surface tube screen on the rooting tube at the bottom of the tube screen. Step S3: Pass the load-bearing scaffold pipe through the connecting structure of the connecting section, and make the load-bearing scaffold pipe span across the two adjacent heated surface pipe screens, and lock both ends of the load-bearing scaffold pipe. Step S4: Lay planks on the load-bearing scaffold pipes and fix the planks to the load-bearing scaffold pipes; Step S5: Fill and seal the gap between the body and the rooting tube to eliminate the holes and gaps in the isolation platform at the hanging point.

[0010] In a preferred embodiment of the chassis frame structure and erection method for the heated surface tube screen described in this invention: in step S2, the U-shaped hanging plate is hooked onto the rooting tube by gravity, and at least one U-shaped hanging plate is hung on each heated surface tube screen.

[0011] In a preferred embodiment of the chassis frame structure and erection method for the heated surface tube panel described in this invention: the specific method for filling and sealing in step S5 is as follows: Select a filling scaffolding pipe and place it inside the gap of the hook part of the U-shaped hanging plate, using the pipe wall of the filling scaffolding pipe to fill the gap between the U-shaped hanging plate and the rooting pipe.

[0012] In a preferred embodiment of the chassis frame structure and erection method for the heated surface tube panel described in this invention: after step S4 is completed, step S6 is further included: The entire isolation scaffolding platform is covered with three-proof cloth to seal the holes in the steel planks and the tiny gaps around the platform, forming a sealed isolation layer.

[0013] In a preferred embodiment of the chassis frame structure and erection method for the heated surface tube panel described in this invention: the erection elevation of the isolation scaffolding platform is lower than the outermost end of the boiler flame deflector, so that the platform can block objects sliding down from the flame deflector.

[0014] In a preferred embodiment of the chassis frame structure and erection method for the heated surface tube screen described in this invention: when the steel wire rope used for furnace maintenance needs to pass through the isolation scaffolding platform, a steel wire rope protection device is installed at the corresponding position on the platform. The steel wire rope protection device is sleeved on the outside of the steel wire rope to prevent objects falling from heights from falling through the steel wire rope through the through hole and to protect the steel wire rope from collision.

[0015] The beneficial effects of this invention are as follows: the position of the rooting tube remains unchanged, and the use of the U-shaped hanging plate causes the entire platform to shift downward, so that the steel scaffolding is no longer affected by the self-clamping tube, which can better fill the gaps. The gaps inside the U-shaped scraper are filled by the scaffolding tube, which greatly reduces the gaps in the platform. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 A schematic diagram of a chassis frame structure for a heated surface tube panel is shown. Figure 2 A front view of the U-shaped hanging panel is shown; Figure 3 A side view of the U-shaped hanging panel is shown; Figure 4 A side view of a chassis frame for a heated surface tube panel is shown; Figure 5 A side view of a chassis frame for a heated surface tube panel in the prior art is shown; Figure 6 The process of assembling a chassis frame for a heated surface tube panel is shown. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0018] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0019] Reference Figures 1-5 This embodiment provides a chassis frame for a heated surface tube screen, including a body 1. The body 1 is made of high-strength metal material (such as Q235 steel) and has an overall long strip plate structure, which has sufficient strength to withstand the load transmitted by the isolation platform.

[0020] Specifically, the top of the main body 1 is provided with a hook part 11 for hooking onto the rooting tube 21 at the bottom of the heated surface tube screen 2. In a natural hanging state, the main body 1 mainly relies on its own weight to be hooked by the hook part 11. The lower part of the main body 1 is provided with a downwardly extending vertical connecting section 12. In this embodiment, the vertical connecting section 12 and the top hook part 11 can be an integrally formed structure, or they can be fixedly connected by welding or other methods. The specific method is not limited. The vertical connecting section 12 is provided with a connecting structure 13 for inserting the load-bearing scaffold tube 32. In this embodiment, the connecting structure 13 is preferably a circular through hole to facilitate the smooth passage of the scaffold tube. In addition to the connecting structure, it can also be set as a hook or a slot, but with hooks or slots, the scaffold tube is easy to slip off, and the safety is far lower than that of the insertion and fixing. When the hook 11 is hung on the rooting tube 21, the vertical connecting section 12 extends downward, so that the load-bearing scaffolding tube 32 passing through the connecting structure 13 is located below the rooting tube 21, thus avoiding the self-clamping tube 22 at the bottom of the heated surface tube screen 2. In this embodiment, the position of the load-bearing scaffolding tube 32 passing through the connecting structure 13 is moved downward due to the vertical connecting section 12. This structural design makes the axial elevation of the load-bearing scaffolding tube 32 significantly lower than the axial elevation of the rooting tube 21. The load-bearing scaffolding tube 32 is located below the rooting tube 21, thereby avoiding the self-clamping tube 22. In the prior art, the scaffolding tube is usually directly tied to the rooting tube 21. Figure 5As shown), the bottom of the heated surface tube panel is usually equipped with a self-clamping pipe 22 for fixing the tube bank (the diameter of the self-clamping pipe is usually about 60mm and protrudes from the bottom of the tube panel). If the scaffolding pipe is located above the rooting pipe, the steel planks laid on the scaffolding pipe will be blocked by the protruding self-clamping pipe 22, which will prevent the steel planks from being laid tightly. This will inevitably leave large holes and gaps at the self-clamping pipe position, resulting in poor isolation effect and high risk of falling objects from height. The main purpose of designing the main body 1 is to enable the load-bearing scaffolding pipe 32 to be located below the rooting pipe 21, avoiding interference from the complex structure at the bottom of the boiler tube panel, and laying the structural foundation for the subsequent realization of a seamless isolation platform.

[0021] Reference Figures 1-5 As an optional embodiment, the main body 1 is a U-shaped hanging plate, and the hook part 11 has a U-shaped opening structure. The width of the U-shaped opening structure is greater than or equal to the outer diameter of the rooting tube 21. The internal space of the U-shaped opening structure is used to accommodate the rooting tube 21. The width of the U-shaped opening structure is greater than or equal to the outer diameter of the rooting tube 21 at the bottom of the heated surface tube screen 2. When the hanging operation is carried out, the construction personnel only need to align the U-shaped opening with the rooting tube 21 to accommodate the rooting tube 21 in the internal space of the U-shaped opening structure. The U-shaped hanging plate is quickly positioned and initially fixed by gravity. The installation can be completed without additional fastening tools. The connecting structure 13 on the vertical connecting section 12 is a through hole, and the axis of the through hole is perpendicular to the plane of the U-shaped opening. Since the plane of the U-shaped opening of the hook part 11 is usually perpendicular to the axial direction of the rooting tube 21 (i.e., it holds the tube in place), the axial direction of the connecting structure 13 is naturally parallel to or consistent with the axial direction of the rooting tube 21. This ensures that the load-bearing scaffolding tube 32 passing through the connecting structure 13 can extend along the length of the rooting tube 21, thereby spanning two adjacent heated surface tube panels (such as...). Figure 1 As shown in the figure, it serves as the main supporting beam.

[0022] Furthermore, the vertical connecting section 12 is also provided with a locking mechanism (not shown in the attached drawings). The locking mechanism is used to lock the load-bearing scaffold pipe 32 passing through the connecting structure 13, preventing the load-bearing scaffold pipe 32 from undergoing axial displacement within the connecting structure 13. In this embodiment, the specific implementation of the locking mechanism can be varied, including but not limited to the following structure: The locking mechanism includes a threaded hole opened on the side wall of the vertical connecting section 12 and communicating with the connecting structure 13, and a locking bolt (or set screw) provided with the threaded hole. When the load-bearing scaffold pipe 32 passes through the connecting structure 13, the locking mechanism locks the load-bearing scaffold pipe 32. 3. After adjusting to the predetermined position, the operator tightens the locking bolts. The end of the bolts presses against the outer wall of the load-bearing scaffolding pipe 32, thereby generating sufficient friction to lock the load-bearing scaffolding pipe 32 onto the U-shaped hanging plate. In addition, the locking mechanism can also adopt other mechanical fixing forms such as quick buckles or special-shaped pins. The existence of this locking mechanism makes a rigid connection node between the load-bearing scaffolding pipe 32 and the U-shaped hanging plate, effectively avoiding the risk of scaffolding pipe slippage due to platform shaking or external force interference, and significantly improving the structural stability and safety of the entire isolation scaffolding platform.

[0023] Specifically, the width of the U-shaped hanging plate is 100mm~120mm. This width range ensures that the hanging plate has sufficient contact area to stably hook onto the rooting tube 21, while facilitating installation operations in the gaps between tubes. The length is 400mm~500mm, the diameter of the connecting structure 13 is 50mm~60mm, and the thickness is not less than 6mm. In this embodiment, the specific width of the U-shaped hanging plate is 114mm, the length is 450mm, the thickness is 6mm, and the diameter of the connecting structure 13 is 56mm. The length of the U-shaped hanging plate is set according to the drooping height of the self-clamping pipe 22 at the bottom of the heated surface tube panel 2 to adjust the elevation of the isolation scaffolding platform. In this embodiment, the length of the U-shaped hanging plate (i.e., the vertical distance from the bottom of the hook part 11 to the center line of the connecting structure 13, plus the length of the extension section below the connecting structure) is not set arbitrarily, but is specifically set according to the drooping height of the self-clamping pipe 22 at the bottom of the heated surface tube panel 2. In the internal structure of the boiler, the self-clamping pipe 22 is usually located at a certain distance below the lowest tube (rooting pipe 21) of the tube panel and protrudes downward. If the length of the U-shaped hanging plate is too short, the position of the load-bearing scaffolding pipe 32 passing through the connecting structure 13 will not be able to move down effectively, resulting in spatial interference between the load-bearing scaffolding pipe 32 and the protruding self-clamping pipe 22, or the steel plank laid on the load-bearing scaffolding pipe 32 will be blocked by the self-clamping pipe 22 and will not be able to fit tightly against the bottom of the tube panel, thus leaving holes and gaps.

[0024] Reference Figures 1-6This embodiment provides a method for erecting a chassis frame for a heated surface tube screen. Step S1: Based on the outer diameter of the tubes of the heated surface tube screen 2, the diameter of the filling scaffolding tube 31, and the design elevation of the platform, process or select a U-shaped hanging plate of appropriate size. In this step, it is necessary to focus on measuring the drooping height of the self-clamping tube 22 at the bottom of the heated surface tube screen 2, and determine the length of the vertical connection section 12 based on this, so as to ensure that the elevation of the subsequently erected platform can effectively avoid the self-clamping tube 22. Step S2: After the maintenance platform inside the furnace is set up, the operators use the maintenance platform to rise to the bottom of the heating surface tube screen 2, and hang the hook part 11 of the chassis frame of the main body 1 for the heating surface tube screen on the rooting tube 21 at the bottom of the tube screen. The main body 1 mainly relies on its own weight to be stably hooked on the rooting tube 21 to achieve rapid positioning, and ensure the uniformity of the load on the platform. Step S3: Pass the load-bearing scaffold pipe 32 through the connecting structure 13 of the vertical connecting section 12 of the main body 1, and make the load-bearing scaffold pipe 32 span across the two adjacent heated surface pipe screens. If the two ends of the load-bearing scaffold pipe 32 are locked with fasteners, since the connecting structure 13 is located at the lower part of the vertical connecting section 12, the load-bearing scaffold pipe 32 is naturally located below the rooting pipe 21, thereby avoiding the self-clamping pipe 22 at the bottom. The setting of the fasteners achieves the limiting function, preventing the load-bearing scaffold pipe 32 from axially moving or slipping, forming a stable platform load-bearing skeleton. Step S4: Lay steel planks on the load-bearing scaffolding pipe 3 to form a working platform surface, and fix the steel planks to the load-bearing scaffolding pipe 32. This step can be done by binding or other methods, without specific limitations, to prevent the planks from loosening or tilting. Step S5: Given the gap between the hook part 11 of the main body 1 and the rooting tube 21, in order to eliminate the risk of falling objects from heights, it is necessary to fill and seal the gap between the main body 1 and the rooting tube 21 to eliminate the holes and gaps of the isolation platform at the hanging point. In this embodiment, a filling scaffolding tube 31 with a suitable outer diameter is selected and placed in the internal gap of the hook part 11 of the main body 1. The tube wall of the filling scaffolding tube 31 is used to fill the gap between the main body 1 and the rooting tube 21, thereby eliminating the holes and gaps of the isolation platform at the hanging point and achieving seamless coverage of the top surface of the platform.

[0025] Furthermore, in step S2, the U-shaped hanging plate is hung on the rooting tube 21 by gravity. At least one U-shaped hanging plate is hung on each heated surface tube screen, preferably 2 to 4 U-shaped hanging plates. The specific number is determined based on the width of the tube screen and the load.

[0026] Specifically, the filling and sealing method in step S5 is as follows: select a filling scaffolding pipe 31, place it in the gap inside the hook part 11 of the U-shaped hanging plate, and use the pipe wall of the filling scaffolding pipe 31 to fill the gap between the U-shaped hanging plate and the rooting pipe 21.

[0027] Furthermore, after step S4 is completed, step S6 is also included: using three-proof cloth to cover the entire isolation scaffolding platform, sealing the holes in the steel planks themselves and the tiny gaps around the platform to form a sealed isolation layer.

[0028] Furthermore, the elevation of the isolation scaffolding platform is lower than the outermost end of the boiler's flame deflector, enabling the platform to block objects sliding down from the flame deflector and prevent them from falling directly to the bottom of the furnace, thus further improving the safety of cross-operations.

[0029] Furthermore, when the wire rope used for maintenance inside the furnace needs to pass through the isolation scaffolding platform, a wire rope protection device is installed at the corresponding position on the platform. The wire rope protection device is fitted over the outside of the wire rope to prevent objects from falling through the wire rope through the hole and to protect the wire rope from collision. In other words, to avoid friction damage between the wire rope and the platform or accidental contact by personnel, a wire rope protection device is installed at the corresponding position on the platform.

[0030] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A chassis frame structure for a heated surface tube panel, characterized in that: Includes a body (1), the top of which is provided with a hook (11) for hooking onto the rooting tube (21) at the bottom of the heated surface tube screen (2), and the lower part of the body (1) is provided with a connecting section (12), and the connecting section (12) is provided with a connecting structure (13) for inserting a load-bearing scaffolding tube (32). When the hook (11) is hung on the rooting tube (21), the connecting section (12) extends downward, so that the load-bearing scaffolding tube (32) passing through the connecting structure (13) is located below the rooting tube (21).

2. The chassis frame structure for a heated surface tube screen according to claim 1, characterized in that: The main body (1) is a U-shaped hanging plate, and the hook part (11) has a U-shaped opening structure. The width of the U-shaped opening structure is greater than or equal to the outer diameter of the rooting tube (21), and the internal space of the U-shaped opening structure is used to accommodate the rooting tube (21). The connecting structure (13) opened on the connecting segment (12) is a through hole, and the axis of the through hole is perpendicular to the plane where the U-shaped opening is located.

3. The chassis frame structure for a heated surface tube panel according to claim 2, characterized in that: The connecting section (12) is also provided with a locking mechanism, which is used to lock the load-bearing scaffold pipe (32) passing through the connecting structure (13) to prevent the load-bearing scaffold pipe (32) from axially displacing within the connecting structure (13).

4. The chassis frame structure for a heated surface tube panel according to claim 2, characterized in that: The width of the U-shaped hanging plate is 100mm~120mm, the length is 400mm~500mm, and the thickness is not less than 6mm. The diameter of the connecting structure (13) is 50mm~60mm. The length of the U-shaped hanging plate is set according to the drooping height of the self-clamping pipe (22) at the bottom of the heated surface tube panel (2) to adjust the elevation of the isolation scaffolding platform.

5. A method for erecting a chassis frame for a heated surface tube panel, characterized in that: The chassis frame structure for a heated surface tube panel as described in any one of claims 1 to 4 includes the following steps: Step S1: Based on the outer diameter of the pipes of the heated surface tube screen (2), the diameter of the filling scaffold pipe (31), and the design elevation of the platform, process or select a body (1) of appropriate size. Step S2: After the maintenance platform inside the furnace is set up, the operator uses the maintenance platform to rise to the bottom of the heating surface tube screen (2) and hangs the hook part (11) of the chassis frame of the main body (1) on the rooting tube (21) at the bottom of the tube screen. Step S3: Pass the load-bearing scaffold pipe (32) through the connection structure (13) of the connecting section (12), and make the load-bearing scaffold pipe (32) span across the adjacent two screens of heated surface pipes, and lock the two ends of the load-bearing scaffold pipe (32); Step S4: Lay planks on the load-bearing scaffolding pipe (32) and fix the planks to the load-bearing scaffolding pipe (32); Step S5: Fill and seal the gap between the body (1) and the rooting tube (21) to eliminate the holes and gaps in the isolation platform at the hanging point.

6. The method for erecting a chassis frame for a heated surface tube panel according to claim 5, characterized in that: In step S2, the U-shaped hanging plate is hung on the rooting tube (21) by gravity, and at least one U-shaped hanging plate is hung on each heated surface tube screen.

7. The method for erecting a chassis frame for a heated surface tube panel according to claim 5, characterized in that: The specific method for filling and sealing in step S5 is as follows: Select a filling scaffolding tube (31) and place it in the gap inside the hook part (11) of the U-shaped hanging plate. Use the wall of the filling scaffolding tube (31) to fill the gap between the U-shaped hanging plate and the rooting tube (21).

8. The method for erecting a chassis frame for a heated surface tube panel according to claim 5, characterized in that: After step S4 is completed, step S6 is also included: The entire isolation scaffolding platform is covered with three-proof cloth to seal the holes in the steel planks and the tiny gaps around the platform, forming a sealed isolation layer.

9. The method for erecting a chassis frame for a heated surface tube panel according to claim 5, characterized in that: The scaffolding platform is erected at a height lower than the outermost edge of the boiler's flame deflector, allowing the platform to block objects that slide down from the flame deflector.

10. The method for erecting a chassis frame for a heated surface tube panel according to claim 5, characterized in that: When the wire rope used for maintenance inside the furnace needs to pass through the isolation scaffolding platform, a wire rope protection device is installed at the corresponding position on the platform. The wire rope protection device is sleeved on the outside of the wire rope to prevent objects from falling through the wire rope through the hole and to protect the wire rope from collision.

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