A reheater mounting device based on tube row control bit and a mounting method thereof

Abstract

The application discloses a reheater mounting device based on tube row control position and a construction method thereof. Specifically, the device comprises a top suspension hanger assembly, a lifting system, a cage, a hydraulic locking mechanism and a self-adapting telescopic guide wheel set. The side wall and the bottom of the cage are openable and closable. The hydraulic locking mechanism realizes inward bracing of the furnace wall through circumferentially distributed supporting claws and hydraulic cylinders, and converts the hanging cage into a rigid fixed platform. The telescopic guide wheel set automatically adheres to the furnace wall for guidance during lifting. During construction, the whole cage is suspended at the furnace opening, and after being lowered to the bottom, the cage is locked from bottom to top, layer by layer, and the opening operation is performed, the locking is released and the cage is lifted, and the whole tube row built-in installation is completed. The application eliminates the damage of tube row transfer and installation from the root, the platform does not shake, the operation has no dead angle, and the installation precision, efficiency and safety are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of boiler equipment installation and construction technology, specifically to a reheater installation device and method based on tube bank positioning control. Background Technology

[0002] In power plant boiler installation, low-temperature reheater tube bundles are characterized by numerous rows, dense piping, thin walls, and high forming precision, making them highly susceptible to deformation due to impacts and compression. Traditional construction methods typically involve pre-assembling the tube bundles as a whole on the ground, then hoisting them into the furnace for final connection. This method is prone to causing compression, bending, wear, and deformation of the tube bundles during transportation, hoisting, and alignment, resulting in a high rate of rework and difficulty in ensuring construction quality.

[0003] High-altitude operations inside the furnace often utilize suspended platforms with flexible steel wire rope suspension. These platforms experience significant swaying during operation, have low installation and alignment accuracy, and pose high safety risks at height. While some existing platforms are equipped with guide rails to improve stability, the rail structures are cumbersome, require extensive disassembly and assembly, have poor versatility, and are enclosed on all sides, severely restricting operations such as pipe threading, docking, and welding within the confined space of the furnace.

[0004] Therefore, we propose a special construction device and method that can completely avoid damage to the pipe bank during installation, has high stability, and can adapt to multi-angle operations inside the furnace. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a reheater installation device and method based on tube bank positioning, which can completely avoid damage to the tube bank during installation and can adapt to multi-angle operation inside the furnace.

[0006] This invention provides a reheater installation device based on tube row positioning, comprising: a top suspension assembly for detachable installation at the top furnace opening of a low-temperature reheater; a cage having openable and closable structures on its side walls and bottom; a lifting system installed on the top suspension assembly, with its lifting end connected to and driving the cage to rise and fall; a hydraulic locking mechanism located at the bottom of the cage, including multiple circumferentially distributed support fixing members; each support fixing member including support claws and a hydraulic drive assembly for driving each support claw to expand outward to abut against the inner wall of the furnace; and an adaptive telescopic guide wheel assembly located at the top of the cage, including multiple circumferentially distributed telescopic support cylinders and guide rollers installed at the end of each telescopic support cylinder, wherein the telescopic support cylinders drive the guide rollers to extend outward and fit against the inner wall of the furnace for centering guidance during lifting and falling.

[0007] Furthermore, the hydraulic drive assembly includes a hydraulic cylinder; the hydraulic cylinder is fixedly installed at the bottom of the cage, and the piston rod is fixedly connected to the support claw; when the piston rod of the hydraulic cylinder extends, it pushes the support claw to press against the inner wall of the furnace. In practical applications, the purpose of this design is to lock and fix the cage, so that there will be no shaking during the actual pipe laying process, which would reduce the construction accuracy.

[0008] Furthermore, the hydraulic locking mechanism also includes anti-slip pads; these anti-slip pads are mounted on the support claws and abut against the inner wall of the furnace. In practical applications, the purpose of this design is to further maintain the fixing effect, achieve locking, and prevent slippage.

[0009] Furthermore, the telescopic support cylinder is horizontally arranged, with its cylinder body fixed to the top of the cage, and its piston rod extending and retracting towards the inner wall of the furnace; the guide rollers are omnidirectional rollers; the adaptive telescopic guide wheel assembly includes four sets of the telescopic support cylinders and four sets of the guide rollers, evenly arranged around the top of the cage. In practical applications, the purpose of this design is to maintain stability, especially during lifting and lowering.

[0010] Furthermore, the cage includes a frame body, with its four side walls connected to the frame body via hinges and capable of being flipped open outwards. Quick-release latches are provided between the side walls and the frame body to lock the side walls to the frame body when closed. In practical applications, this design can employ various methods to achieve the outward flipping opening of the side walls, facilitating personnel entry and exit for work.

[0011] Furthermore, the bottom of the cage includes two hinged doors, which are connected to the frame at the bottom of the cage by hinges and are locked by pins and quick-release latches.

[0012] Furthermore, the top suspension assembly includes a lifting ring located above the lifting system, which is an electric hoist. In practical applications, the lifting ring enables the hoisting and transportation of the entire device efficiently and quickly; the electric hoist used in the lifting system is a conventional design, simplifying the overall structure and achieving efficient operation.

[0013] Furthermore, the top suspension assembly includes at least two sets of shaft-type support brackets; the shaft-type support brackets are horizontally and symmetrically arranged at the top furnace opening of the low-temperature reheater; and include: a fixing post, an abutment gasket, and a drive cylinder, the drive cylinder being located at the bottom of the fixing post; the abutment gasket is installed on the outer wall of the fixing post and abuts against the end face of the top mounting port of the low-temperature reheater; the output shaft of the drive cylinder abuts against the furnace wall at the top furnace opening of the low-temperature reheater. In practical work, the purpose of this design is to achieve fixed installation of the entire device. This design enables installation on reheaters of different specifications, effectively improving the applicability of the entire device.

[0014] Secondly, the present invention provides a method for internal installation of a low-temperature reheater tube bank, comprising the following steps: S1. The assembled and debugged cage is hoisted to the top furnace opening of the low-temperature reheater, and the cage is suspended and fixed at the furnace opening by the top suspension assembly. S2. Activate the adaptive telescopic guide wheel assembly, causing the guide rollers to extend outward and fit against the inner wall of the furnace; S3. The lifting system is used to smoothly lower the cage to the bottom working layer inside the furnace. During the lowering process, the guide rollers always roll in contact with the inner wall of the furnace. S4. After the cage reaches the designated working level, the hydraulic locking mechanism is activated, causing each of the support claws to expand outward and simultaneously press against the inner wall of the furnace, thus rigidly fixing the cage in the current position; S5. Depending on the installation requirements of the tube bank, selectively open the side walls and / or bottom of the cage to feed, align, assemble and weld the heat exchange tube bank. S6. After all pipe rows in the current working layer have been installed and inspected and qualified, the hydraulic locking mechanism is retracted to release the rigid fixation; S7. Using the lifting system, lift the cage to the next adjacent working height, and repeat the locking and installation steps from S4 to S6. S8. Repeat S7 until the installation of all cryogenic reheater tube banks is completed from bottom to top; S9. After all pipe installations have passed inspection, the hydraulic locking mechanism and the adaptive telescopic guide wheel assembly are retracted in sequence, the installation device is lifted to the furnace opening, the top suspension assembly is released, and the entire cage is lifted off the furnace body.

[0015] As can be seen from the above technical solution, the beneficial effects of the reheater installation device and method based on tube bank positioning provided by the present invention are as follows: (1) First of all, the finished product protection effect is excellent. The process of fixing the boiler body first and then installing it row by row from bottom to top in the furnace is adopted. The pipes are directly assembled in the furnace, which completely avoids the problems of bumps, squeezing and deformation during the overall pre-assembly, transportation and hoisting process.

[0016] (2) Secondly, the working platform has extremely high stability. By hydraulically locking the four-point internal support, the flexible suspended platform is transformed into a rigid fixed platform, completely eliminating shaking, offset and torsion in the furnace, and greatly improving the accuracy of pipe alignment and welding quality.

[0017] (3) The guide structure is simple and reliable. The traditional bulky guide rail is eliminated and an adaptive telescopic guide wheel set is adopted. The guide is automatically centered throughout the lifting process. The structure is simple, versatile and has no risk of jamming.

[0018] (4) And there are no blind spots in the operation. The four sides and bottom of the cage can be fully opened, which can adapt to multi-angle pipe feeding, pipe insertion, alignment and welding operations in the narrow space inside the furnace, breaking the operation limitations of the traditional closed platform.

[0019] (5) Construction safety has been significantly enhanced. The entire unit is modularly hoisted and rigidly locked, avoiding the risk of falling from heights throughout the process; the opening and closing structure is equipped with quick-release locks to ensure reliable enclosure of the cage when not in operation.

[0020] (6) Scientific and efficient process. Construction is carried out layer by layer from bottom to top, without the obstruction of the upper structure, the pipe fittings are smoothly delivered, the operating space is open, and the construction error tolerance rate is high. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0022] Figure 1 This is a schematic diagram of the installation structure of the present invention mounted on a low-temperature reheater; Figure 2 This is a schematic diagram of the main structure of the present invention; Figure 3 This is a top view of the bottom panel of the present invention; Figure 4 This is a schematic diagram of the construction method of the present invention; Figure label: Top suspension assembly 1, lifting system 2, cage 3, hydraulic locking mechanism 4, adaptive telescopic guide wheel assembly 5, shaft support bracket 11, lifting ring 12, fixing pin 111, abutment pad 112, drive cylinder 113, side wall 31, quick release buckle 32, bottom 33, door panel 331, pin 332, support claw 41, hydraulic cylinder 43, anti-slip pad 42, telescopic support cylinder 51, guide roller 52. Detailed Implementation

[0023] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0024] The basic implementation examples are as follows: Figures 1 to 4 As shown: like Figure 1-3 As shown in the embodiment, this invention provides a reheater installation device based on tube bank positioning. The core concept of this device is to overturn the traditional process of "pre-installing tube banks on the ground and hoisting them into the furnace as a whole," and instead "first fixing the furnace body, then installing the tube banks internally." For this purpose, an integrated construction device was specially designed, combining suspension fixing, lifting drive, an openable working platform, hydraulic rigid locking, and adaptive guidance. The device mainly consists of five parts: a top suspension assembly 1, a lifting system 2, a cage 3, a hydraulic locking mechanism 4, and an adaptive telescopic guide wheel assembly 5. These parts work together to achieve non-destructive, high-precision, and highly safe internal installation of the low-temperature reheater tube banks.

[0025] Regarding the top suspension assembly The top suspension assembly 1 is used to enable the detachable installation of the entire device at the top furnace opening of the low-temperature reheater. It bears the weight of the entire device, the load of construction personnel and pipe fittings, and is the foundation of the entire device. In the general statement of claim 1, the assembly is defined as "for detachable installation at the top furnace opening of the low-temperature reheater". Its structure will now be described in detail with reference to specific embodiments.

[0026] In this embodiment, the top suspension assembly 1 integrates both hoisting and fixing functions. This assembly includes a lifting ring 12 and at least two sets of shaft-type support brackets 11. The lifting ring 12 is located above the lifting system 2 and is used to connect to an external crane during the overall hoisting of the device, enabling efficient and rapid modular overall transfer.

[0027] The axial support bracket 11 is a key structure for achieving the core function of "detachable fixing". It is horizontally and symmetrically arranged at the top of the furnace opening of the low-temperature reheater. Each set of axial support brackets 11 includes a fixing pin 111, an abutment gasket 112, and a drive cylinder 113. The fixing pin 111 is a vertical load-bearing body with a downward-opening groove at its lower end for securely locking onto the mounting end face of the furnace opening. The shape and size of this groove can be adapted to the specific structure of the furnace opening end face. The abutment gasket 112 is installed on the outer wall of the fixing pin 111 facing the furnace opening end face. When the fixing pin 111 is engaged, the abutment gasket 112 fits tightly against the top mounting end face of the low-temperature reheater, increasing the contact area, dispersing local pressure, protecting the end face, and preventing slippage. The drive cylinder 113 is located at the bottom of the fixing pin 111, with its cylinder body fixedly connected to the fixing pin 111, and its output shaft facing the furnace wall. Preferably, the drive cylinder 113 is a hydraulic cylinder with its output shaft extending horizontally. Its end presses against and abuts against the furnace wall at the top of the low-temperature reheater. The resulting reverse thrust securely locks the fixing pin 111 and the abutment gasket 112 to the furnace opening end face, thereby achieving a stable and reliable detachable rigid fixation between the top suspension assembly 1 and the furnace structure. When disassembly is required, simply retract the output shaft of the drive cylinder 113 to release the lock and lift the entire device upwards away from the furnace opening.

[0028] With the above structure, the top suspension assembly 1 not only achieves reliable suspension and fixation, but also, by adjusting the stroke of the drive cylinder 113, can adapt to furnace opening structures with different wall thicknesses within a certain range, effectively improving the versatility and applicability of the device.

[0029] Regarding the lifting system The lifting system 2 is installed on the top suspension assembly 1, and its lifting end is connected to and drives the cage 3 to perform vertical lifting movements. In this embodiment, the lifting system 2 uses an electric hoist. As a mature lifting device, the electric hoist's body is fixedly suspended from the lifting ring 12 of the top suspension assembly 1 or below the main frame, and the hook of the wire rope is connected to the lifting lug at the top of the cage 3. The purpose of choosing an electric hoist is to utilize its characteristics of smooth start and stop, precise height fine-tuning, and fixed-point suspension, which can simplify the overall complexity of the device, while achieving efficient and precise vertical lifting control to meet the requirements of layered, step-by-step, and high-precision pipe assembly.

[0030] Regarding the cage Cage 3 is the direct platform for carrying construction personnel and carrying out operations in this device. Its main body adopts a lightweight cage-type frame structure, including a top frame, a bottom frame, multiple columns, and cross braces. Cage 3 innovatively features openable and closable side walls 31 and bottom 33, completely breaking the operational limitations of traditional enclosed platforms in the confined space of the furnace.

[0031] Specifically, the four side walls 31 of the cage 3 are connected to the frame body via hinges, allowing each side wall 31 to be opened outwards. The opening method can be implemented in various ways; for example, the side wall 31 can be flipped up to the outside of the top of the cage 3 via an upward hinge and fixed, or pushed outwards to a certain angle via a side-opening hinge and then locked with an auxiliary support rod. A quick-release latch 32 is provided between the side wall 31 and the frame body to securely lock the side wall 31 to the frame body when closed, ensuring reliable closure of the cage 3 and personnel safety during non-operational periods. When the side wall 31 is open, construction personnel can perform multi-angle pipe connection, pipe threading, and welding operations from the side.

[0032] The bottom 33 of the cage 3 is also designed as an openable structure. In this embodiment, the bottom 33 includes two hinged door panels 331, which are connected to the frame at the bottom of the cage 3 by hinges and can be opened downwards or to the sides. When the door panels 331 are closed, they are reliably locked by a pin and a quick-release latch 32. When vertical insertion of pipes or bottom alignment installation is required, the operator can release the quick-release latch 32 and open the bottom door panel 331, allowing the pipes to be vertically inserted from directly below the device, greatly facilitating construction operations.

[0033] Regarding the hydraulic locking mechanism The hydraulic locking mechanism 4 is the core component for achieving high stability operation in this invention. In claim 1, it is summarized as "located at the bottom of the cage 3, including a plurality of support fixing members distributed circumferentially; the support fixing members include support claws 41, and a hydraulic drive assembly for driving each support claw 41 to expand outward to press against the inner wall of the furnace". Its specific structure will now be described in detail.

[0034] The hydraulic locking mechanism 4 is located on the outer periphery of the bottom frame of the cage 3. Its function is to transform the cage 3, which is originally flexibly suspended by steel wire ropes, into a rigid and fixed working platform during operation, completely eliminating the problems of shaking, displacement, and torsion within the furnace. This mechanism includes multiple support and fixing components evenly distributed along the circumference of the bottom of the cage 3. Preferably, four sets of support and fixing components are provided, arranged in a cross-shaped symmetrical pattern. Each support and fixing component includes a support claw 41 and a set of hydraulic drive components.

[0035] The hydraulic drive assembly includes a hydraulic cylinder 43. The cylinder body of the hydraulic cylinder 43 is fixedly mounted on the bottom frame of the cage 3, and the end of its piston rod is fixedly connected to a support claw 41. The outer end face of the support claw 41 faces the inner wall of the furnace. When the hydraulic system supplies oil to the rodless chamber of the hydraulic cylinder 43, the piston rod extends outward, directly pushing the support claw 41 radially outward until it is pressed and locked against the inner wall of the furnace, forming an internal support rigid clamp. Through multi-point synchronous internal support locking, the cage 3 is locked and fixed in the current position, so that during the actual pipe laying process, the entire working platform is as if it is directly fixed to the furnace wall, and there will be no shaking caused by flexible suspension, thereby greatly improving the alignment accuracy and welding quality of the pipe laying.

[0036] To further enhance the fixing effect, the hydraulic locking mechanism 4 also includes an anti-slip pad 42. This anti-slip pad 42 is installed on the end face of the support claw 41 that contacts the inner wall of the furnace. When the support claw 41 is pushed out and presses against the furnace wall, the anti-slip pad 42 directly abuts against the inner wall of the furnace. The anti-slip pad 42 is made of a material with a high coefficient of friction, such as wear-resistant rubber, polyurethane, or composite fiber materials. Its purpose is to significantly enhance the static friction between the support claw 41 and the furnace wall, ensuring that the support claw 41 will not slip even slightly when subjected to construction loads and possible impacts, thus ensuring operational safety.

[0037] Regarding adaptive telescopic guide wheel assembly The adaptive telescopic guide wheel assembly 5 is located at the top of the cage 3. Its function is to automatically center and guide the cage during lifting and lowering, replacing the traditional complex and cumbersome fixed guide rail. Claim 1 summarizes it as "comprising a plurality of telescopic support cylinders 51 distributed circumferentially, and guide rollers 52 installed at the end of each telescopic support cylinder 51, wherein the telescopic support cylinders 51 drive the guide rollers 52 to extend outward and conform to the inner wall of the furnace body for centering and guiding during lifting and lowering." The following is a detailed description.

[0038] The guide wheel assembly includes multiple telescopic support cylinders 51 evenly distributed around the top circumference of the cage 3, and guide rollers 52 installed at the end of each telescopic support cylinder 51. The telescopic support cylinders 51 are horizontally arranged, with their cylinder bodies fixed to the top frame of the cage 3, and their piston rods extending and retracting towards the inner wall of the furnace. The guide rollers 52 are omnidirectional rollers with universal rotation function to adapt to minor unevenness or local bumps that may exist on the furnace wall. As a preferred embodiment, the adaptive telescopic guide wheel assembly 5 includes four sets of telescopic support cylinders 51 and four sets of guide rollers 52, evenly arranged around the top of the cage 3, forming a four-point symmetrical guide support layout.

[0039] Before the lifting operation, oil is supplied to the telescopic support cylinder 51, causing its piston rod to extend outward and drive the guide roller 52 to move outward until it adheres to and presses against the inner wall of the furnace, maintaining a certain pre-pressure. During the lifting process, this pre-pressure continues to act, and the guide roller 52 rolls along the furnace wall, achieving automatic centering guidance throughout the entire process. Because the telescopic support cylinder 51 has a certain telescopic compensation capability, the guide roller 52 can adapt to slight changes in the inner diameter of the furnace and local unevenness, always maintaining effective contact, thereby effectively preventing the cage 3 from shifting, jamming, or scraping against the furnace wall during the lifting process. This design has a simple structure, strong versatility, and no risk of jamming, completely eliminating the drawbacks of traditional guide rails that are cumbersome to install and require a large amount of disassembly and assembly.

[0040] Regarding construction methods like Figure 4 As shown, this invention also provides a method for the internal installation of low-temperature reheater tube banks, which uses the aforementioned reheater installation device based on tube bank positioning. This method innovatively employs a process of first fixing the boiler body and then assembling the tube banks row by row from bottom to top inside the furnace, fundamentally avoiding the damage risks associated with the overall transportation and hoisting of the tube banks. The method specifically includes the following steps: S1. Preliminary Preparations and Equipment Placement: Ensure that the boiler body and the low-temperature reheater housing frame have been installed, aligned, welded, and accepted. The installation device, which has been assembled and debugged on the ground, is lifted as a whole to the top furnace opening of the low-temperature reheater using a site crane via the lifting rings 12 on its top suspension assembly 1. The lowering device is used to engage the slots at the lower ends of the fixing pins 111 of each set of shaft support brackets 11 in the top suspension assembly 1 with the installation port end face of the furnace opening. Then, the drive cylinder 113 is activated, causing its output shaft to extend horizontally and press against the side wall of the furnace opening, thus stably suspending and locking the entire device at the furnace opening.

[0041] S2. Pre-adjust the guide structure; start the adaptive telescopic guide wheel group 5, supply oil to the telescopic support cylinder 51, so that its piston rod extends outward, driving each group of guide rollers 52 at the top to move outward until they are in contact with and pressed against the inner wall of the furnace, preparing for the lifting process.

[0042] S3. Lowering to the initial working layer; the installation device is smoothly lowered to the bottom working layer inside the furnace using the lifting system 2. Throughout the lowering process, the top guide rollers 52 roll on the inner wall of the furnace to keep the device centered and stable, without deviation or jamming.

[0043] S4. Rigid locking of the working layer; after the device reaches the designated working layer, the hydraulic locking mechanism 4 at the bottom is activated. The hydraulic system synchronously supplies oil to each set of hydraulic cylinders 43, causing each support claw 41 to expand outward, driving the anti-slip pads 42 at their ends to synchronously and evenly press against the inner wall of the furnace, transforming the entire device from a flexible suspension state to a rigid fixed state at the current position, forming a stable and shaky working platform.

[0044] S5. Pipe installation operation; depending on the specific needs of pipe installation at the current working level, the construction personnel may selectively open the side walls 31 and / or the bottom 33 of the cage 3. For example, the side walls 31 can be opened from the side for horizontal insertion, pipe threading, and alignment of the pipes, or the double-leaf doors 331 of the bottom 33 can be opened for vertical insertion of the pipes, or both can be opened simultaneously to complete complex multi-angle assembly and welding installation. The omnidirectional opening and closing feature of the cage 3 is fully utilized to achieve operation without blind spots.

[0045] S6. Unlock; After all pipe rows of the current working layer have been installed and passed self-inspection, operate the hydraulic system to retract each support claw 41 of the hydraulic locking mechanism 4, release the rigid fixation, and restore the device to a liftable state that can be driven by the lifting system 2.

[0046] S7. Install by lifting layer by layer; use the lifting system 2 to smoothly lift the installation device to the next adjacent working height. Once in place, repeat the locking, installation, and release steps from S4 to S6.

[0047] S8. Cyclic Operation: Repeat the operation process of step S7, and so on, lifting, locking, and installing layer by layer from bottom to top until the installation of all cryogenic reheater tube banks is completed. Throughout the process, the completed tube banks on the lower layer do not obstruct the construction on the upper layer, the tubes are fed in smoothly, and the operating space remains open at all times.

[0048] S9. Completion and Dismantling: After all pipework installations are completed and pass final acceptance, the hydraulic system is operated sequentially to retract the hydraulic locking mechanism 4 and the adaptive telescopic guide wheel assembly 5, causing the support claw 41 and guide roller 52 to fully retract. Then, the entire installation device is lifted to the furnace opening using the lifting system 2, and the drive cylinder 113 of the top suspension assembly 1 is operated to retract the output shaft, releasing its lock to the furnace opening. Finally, the entire device is lifted off the furnace body using the hoist on-site via the lifting ring 12, completing all construction work.

[0049] Replacement and Optimization Schemes for Installation and Construction Methods In the above embodiments, the construction method adopted a bottom-up, layer-by-layer installation sequence. It is understood that, based on the structural characteristics and functional completeness of this device, the installation device is also compatible with a top-down installation method. When using the top-down method, simply raise the installation device to the top working layer first, complete the installation of that layer, and then lower it to the next layer, proceeding layer by layer downwards. The bottom-up method is considered the preferred solution because it has no upper-layer structural obstructions, a shorter pipe insertion path, and a more open operating space.

[0050] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A reheater installation device based on tube bank positioning, characterized in that, include: Top suspension assembly for detachable installation at the top furnace opening of the low-temperature reheater; The cage body has openable and closable structures for its side walls and bottom. A lifting system is installed on the top suspension assembly, and its lifting end is connected to and drives the cage to lift. A hydraulic locking mechanism is located at the bottom of the cage and includes multiple support and fixing members distributed circumferentially; the support and fixing members include support claws and a hydraulic drive assembly that drives each support claw to expand outward to press against the inner wall of the furnace. An adaptive telescopic guide wheel assembly is located at the top of the cage and includes multiple telescopic support cylinders distributed circumferentially, and guide rollers installed at the end of each telescopic support cylinder. The telescopic support cylinder drives the guide rollers to extend outward and fit against the inner wall of the furnace body to provide centered guidance during lifting and lowering.

2. The reheater installation device based on tube bank positioning according to claim 1, characterized in that, The hydraulic drive assembly includes a hydraulic cylinder; the hydraulic cylinder is fixedly installed at the bottom of the cage, and the piston rod is fixedly connected to the support claw. When the piston rod of the hydraulic cylinder extends, it pushes the support claw to press against the inner wall of the furnace.

3. A reheater installation device based on tube bank positioning according to claim 2, characterized in that, The hydraulic locking mechanism also includes anti-slip pads; The anti-slip pad is installed on the support claw and abuts against the inner wall of the furnace.

4. A reheater installation device based on tube bank positioning according to claim 1, characterized in that, The telescopic support cylinder is arranged horizontally, with its cylinder body fixed to the top of the cage and its piston rod extending and retracting towards the inner wall of the furnace; the guide roller is a universal roller; the adaptive telescopic guide wheel assembly includes four sets of the telescopic support cylinder and four sets of the guide roller, which are evenly arranged around the top of the cage.

5. A reheater installation device based on tube bank positioning according to claim 1, characterized in that, The cage includes a frame body, and the four side walls of the frame body are respectively connected to the frame body by hinges and can be flipped outwards to open; quick-release latches are provided between the side walls and the frame body to lock the side walls to the frame body when closed.

6. A reheater installation device based on tube bank positioning according to claim 5, characterized in that, The bottom of the cage includes two doors that open outwards. The doors are connected to the frame at the bottom of the cage by hinges and are locked in place by pins and quick-release latches.

7. A reheater installation device based on tube bank positioning according to claim 1, characterized in that, The top suspension assembly includes a lifting ring, which is located above the lifting system, which is an electric hoist.

8. A reheater installation device based on tube bank positioning according to claim 1, characterized in that, The top suspension assembly includes no fewer than two sets of shaft-type support brackets; The axial support bracket is horizontally and symmetrically arranged at the top furnace opening of the low-temperature reheater; and includes: a fixed clamping post, an abutment gasket, and a drive cylinder, wherein the drive cylinder is located at the bottom of the fixed clamping post; the abutment gasket is installed on the outer wall of the fixed clamping post and abuts against the end face of the top mounting port of the low-temperature reheater; the output shaft of the drive cylinder abuts against the furnace wall at the top furnace opening of the low-temperature reheater.

9. A method for internal installation of a low-temperature reheater tube bank, employing a reheater installation device based on tube bank positioning as described in any one of claims 1 to 8, characterized in that... Includes the following steps: S1. The assembled and debugged cage is hoisted to the top furnace opening of the low-temperature reheater, and the cage is suspended and fixed at the furnace opening by the top suspension assembly. S2. Activate the adaptive telescopic guide wheel assembly, causing the guide rollers to extend outward and fit against the inner wall of the furnace; S3. The lifting system is used to smoothly lower the cage to the bottom working layer inside the furnace. During the lowering process, the guide rollers always roll in contact with the inner wall of the furnace. S4. After the cage reaches the designated working level, the hydraulic locking mechanism is activated, causing each of the support claws to expand outward and simultaneously press against the inner wall of the furnace, thus rigidly fixing the cage in the current position; S5. Depending on the installation requirements of the tube bank, selectively open the side walls and / or bottom of the cage to feed, align, assemble and weld the heat exchange tube bank. S6. After all pipe rows in the current working layer have been installed and inspected and qualified, the hydraulic locking mechanism is retracted to release the rigid fixation; S7. Using the lifting system, lift the cage to the next adjacent working height, and repeat the locking and installation steps from S4 to S6. S8. Repeat S7 until the installation of all cryogenic reheater tube banks is completed from bottom to top; S9. After all pipe installations have passed inspection, the hydraulic locking mechanism and the adaptive telescopic guide wheel assembly are retracted in sequence, the installation device is lifted to the furnace opening, the top suspension assembly is released, and the entire cage is lifted off the furnace body.

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