Coal-fired unit in-furnace lifting platform

Abstract

The utility model discloses a kind of coal-fired unit furnace inner lifting platforms, including girder, reinforcing beam, side beam, vice beam, folding beam, protector, main hoisting device, hinge, pressing plate, cable-stayed point, cable-stayed upright, railing seat, guide wheel and square pressing plate.Girder and vice beam cross connection form load-bearing frame, reinforcing beam is set below girder to improve rigidity, side beam is surrounded in the periphery of frame.Folding beam is connected with girder or side beam by hinge, fixed by pressing plate and square pressing plate when unfolding, folded around hinge when folding.Main hoisting device cooperates with steel wire rope, steel wire rope is connected with winch through guide wheel, realize platform lifting;Cable-stayed upright and cable-stayed point form triangular support structure, for offsetting horizontal thrust.Protector is used to prevent overload or falling accident, railing seat is used to install safety protection component.The utility model platform structure is stable, safe and reliable, can cover boiler furnace dividing screen and screen superheater area, improve maintenance efficiency and reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of vacuum valves, and in particular to a lifting platform inside a coal-fired power unit furnace. Background Technology

[0002] Maintenance work inside the boiler furnace is a crucial aspect of power plant equipment maintenance. Most existing boiler furnace lifting platforms only meet the maintenance needs of the water-cooled wall area and cannot cover the partition screen area. For maintenance of the partition screen area, scaffolding is typically erected from the bottom up to inspect and repair vulnerable parts. However, the erection and dismantling of scaffolding has the following shortcomings:

[0003] (1) The construction risk is high. Workers need to erect scaffolding in narrow, high-temperature and complex environments, which poses a great safety hazard.

[0004] (2) The construction period is long, which takes up the maintenance period and prolongs the boiler downtime;

[0005] (3) Scaffolding is frequently dismantled and assembled, resulting in high labor and material costs.

[0006] Furthermore, the existing lifting platform has structural design deficiencies, such as insufficient step platforms, preventing access to the partition screen area and posing a significant safety risk; the lifting system lacks effective fall protection and overload protection measures, presenting potential dangers; and the overall structural rigidity of the platform is insufficient, making it prone to swaying during lifting, affecting operational safety and maintenance efficiency. Therefore, structural optimization and safety upgrades of the boiler in-furnace lifting platform are necessary to address these issues. Utility Model Content

[0007] The purpose of this utility model is to provide an in-furnace lifting platform for coal-fired power units, which solves the problems of insufficient operating coverage, low safety protection level, and unstable operation in the existing technology.

[0008] This utility model is achieved using the following technical solution: an in-furnace lifting platform for a coal-fired power unit, characterized in that it includes a main beam, a secondary beam, a side beam, and a reinforcing beam. The main beam and the secondary beam are cross-connected to form a load-bearing frame. The side beams are connected to the periphery of the load-bearing frame. The reinforcing beams are located below the main beam or at a stress concentration point to improve the overall rigidity of the platform. The platform is lifted and lowered by a main hoisting device in conjunction with a wire rope.

[0009] Furthermore, the sub-beam is fixed to the main beam by bolts, and the side beam is connected to the main beam and sub-beam by bolts or welding.

[0010] Furthermore, it also includes a folding beam, one end of which is connected to the main beam or secondary beam via a hinge. When unfolded, it is fixed to the adjacent beam via a pressure plate and a square pressure plate. When folded, it rotates around the hinge to reduce the platform size.

[0011] Furthermore, the main lifting device works in conjunction with a wire rope, which is connected to a winch after its direction is changed by a guide wheel, and is used to drive the overall lifting and lowering of the platform.

[0012] Furthermore, it also includes inclined support columns and inclined support points. The inclined support columns are fixed to the corners of the platform, and the tops are connected to the inclined support points by steel wire ropes to form a triangular force-bearing structure, which is used to counteract the horizontal thrust when the folding beam is unfolded.

[0013] Furthermore, it also includes a protector installed in the main hoisting device or wire rope transmission path to monitor the operating status and trigger braking in case of overload or wire rope abnormality.

[0014] Furthermore, it also includes a railing base, which is fixed to the top of the side beam and used to install a safety fence or protective post.

[0015] The beneficial effects of the coal-fired power unit furnace lifting platform described in this utility model include:

[0016] The folding beam structure and pre-reserved maintenance access allow the platform to cover the partition screen and superheater area, eliminating the need for scaffolding and improving maintenance flexibility. A "well"-shaped load-bearing frame is formed by the main beams, secondary beams, side beams, and reinforcing beams, with diagonal bracing columns and bracing points at the platform corners to create a triangular stability structure that effectively counteracts horizontal thrust and ensures balanced stress distribution. The platform is equipped with safety devices to monitor and brake for overload and rope breakage, enhancing operational safety; protective railings can be installed on the railing bases to prevent personnel and tools from falling. The folding beams are connected to the main beams or side beams via hinges, allowing the platform to be folded up for easy access to the furnace during transport or installation; high-strength aluminum alloy beams reduce the platform's weight while maintaining load-bearing capacity. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a top-down schematic diagram of an in-furnace lifting platform in a coal-fired power unit;

[0019] Figure 2 This is a side view of an in-furnace lifting platform in a coal-fired power unit;

[0020] In the diagram: 1-Main beam; 2-Strengthening beam; 3-Side beam; 4-Secondary beam; 5-Folding beam; 6-Protective device; 7-Main lifting device; 8-Hinge; 9-Pressure plate; 10-Diagonal tie point; 11-Diagonal tie column; 12-Guard post; 13-Guide wheel; 14-Square pressure plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. Example

[0023] like Figure 1 As shown, this embodiment provides an in-furnace lifting platform for a coal-fired unit, including a main beam 1, a reinforcing beam 2, a side beam 3, a secondary beam 4, a folding beam 5, a protector 6, a main lifting device 7, a hinge 8, a pressure plate 9, a tie point 10, a tie column 11, a railing seat 12, a guide wheel 13, and a square pressure plate 14.

[0024] The main beam 1 is horizontally positioned in the center of the platform, serving as the core load-bearing component. The secondary beam 4 is vertically positioned and cross-connected to the main beam 1 via high-strength bolts, forming a "well"-shaped planar frame structure to bear the operational load. The reinforcing beam 2 is located below the main beam 1 and is fixed to the main beam 1 by welding or bolts, enhancing the overall rigidity of the platform and reducing the deformation of the main beam 1 under stress. The side beams 3 are arranged around the perimeter of the platform, with both ends bolted to the main beam 1 and the secondary beam 4 respectively, forming a closed frame to define the working area and serve as the fixed base for the railing seat 12.

[0025] The folding beam 5 is connected to the main beam 1 or the secondary beam 4 via a hinge 8. The hinge 8 is a pin-type hinge, allowing the folding beam 5 to rotate horizontally. When the platform is unfolded, the folding beam 5 rotates to be flush with the main beam 1 or the secondary beam 4, and is pressed and fixed by the square pressure plate 14 and the pressure plate 9, so that the folding beam 5 and the adjacent beam form a continuous load-bearing whole. When the platform is retracted, the folding beam 5 folds around the hinge 8, reducing the overall size, making it easier for the platform to enter the furnace through the boiler manhole.

[0026] The main lifting device 7 is symmetrically installed at both ends of the main beam 1, and the lifting points are reinforced to the main beam 1 with bolts. The main lifting device 7 works in conjunction with the wire rope, which is guided by the guide wheel 13 and then connected to the furnace top winch to drive the overall lifting of the platform. The guide wheel 13 is fixed to the furnace anchor point through the bracket, which changes the direction of the wire rope and reduces friction, ensuring that the platform lifts and lowers smoothly and without interfering with the furnace wall.

[0027] The inclined support column 11 is vertically welded to the corner of the side beam 3, and the top is provided with an inclined support point 10. One end of the steel wire rope is fixed to the inclined support point 10, and the other end is anchored to the furnace wall or furnace top structure. The inclined support column 11 and the steel wire rope form a triangular support structure to counteract the horizontal thrust generated when the folding beam 5 is unfolded and prevent the platform from tilting.

[0028] The protector 6 is installed on the main hoisting device 7 or the wire rope path, and includes an overload limiter and a fall arrestor. When the platform load exceeds the set value, the protector 6 automatically cuts off the drive power of the winch and triggers the brake to prevent the platform from operating under overload. When the wire rope breaks or slacks, the protector 6 can lock the wire rope or drum to prevent the platform from falling.

[0029] The railing bases 12 are evenly distributed on the upper surface of the side beams 3, serving as the foundation for the subsequent installation of protective railings or fences. The railing posts are inserted into the railing bases 12 and fixed with bolts, thus providing conditions for the construction of safety protection around the platform.

[0030] Through the above structural design, the main beam 1, secondary beam 4, side beam 3 and reinforcing beam 2 form a load-bearing skeleton. The folding beam 5 can be flexibly unfolded and retracted through the hinge 8 and the square pressure plate 14. The main hoisting device 7, wire rope and guide wheel 13 realize the lifting and lowering of the platform. The inclined column 11 and inclined point 10 provide triangular stability support. The protector 6 ensures the safety of the operation process. The railing seat 12 provides an installation interface for subsequent protective measures.

[0031] The boiler in-furnace lifting platform provided in this embodiment can realize a stable operating platform that can be deployed and retracted inside the furnace, improving adaptability and operability in a limited space, ensuring smooth and safe lifting process, and meeting the maintenance needs of the boiler furnace partition screen area and the screen-type superheater area.

[0032] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Modifications and variations made by those skilled in the art without departing from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A lifting platform inside a coal-fired power unit, characterized in that, The platform includes a main beam (1), a secondary beam (4), a side beam (3), and a reinforcing beam (2). The main beam (1) and the secondary beam (4) are connected to each other to form a load-bearing frame. The side beam (3) is connected to the periphery of the load-bearing frame. The reinforcing beam (2) is located below the main beam (1) or at a stress concentration point to improve the overall rigidity of the platform. The platform is lifted and lowered by a main hoisting device (7) in conjunction with a wire rope.

2. The in-furnace lifting platform for a coal-fired power unit according to claim 1, characterized in that, The secondary beam (4) is fixed to the main beam (1) by bolts, and the side beam (3) is connected to the main beam (1) and the secondary beam (4) by bolts or welding.

3. The in-furnace lifting platform for a coal-fired power unit according to claim 2, characterized in that, It also includes a folding beam (5), one end of which is connected to the main beam (1) or the secondary beam (4) via a hinge (8). When unfolded, it is fixed to the adjacent beam via a pressure plate (9) and a square pressure plate (14). When folded, it rotates around the hinge (8) to reduce the platform size.

4. The in-furnace lifting platform for a coal-fired power unit according to claim 1, characterized in that, The main lifting device (7) works in conjunction with the wire rope. The wire rope is connected to the winch after its direction is changed by the guide wheel (13), and is used to drive the overall lifting and lowering of the platform.

5. The in-furnace lifting platform for a coal-fired power unit according to claim 1, characterized in that, It also includes a tie column (11) and a tie point (10). The tie column (11) is fixed to the corner of the platform and its top is connected to the tie point (10) by a steel wire rope to form a triangular force structure to counteract the horizontal thrust when the folding beam (5) is unfolded.

6. The in-furnace lifting platform for a coal-fired power unit according to claim 1, characterized in that, It also includes a protector (6), which is installed in the main hoisting device (7) or the wire rope transmission path to monitor the operating status and trigger braking in case of overload or wire rope abnormality.

7. The in-furnace lifting platform for a coal-fired power unit according to claim 1, characterized in that, It also includes a railing seat (12), which is fixed to the top of the side beam (3) and is used to install a safety fence or protective post.

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