Disassembly-free in-furnace maintenance platform of pi-shaped boiler

Abstract

The invention discloses a disassembly-free in-furnace maintenance platform of a pi-shaped boiler, and relates to the field of boiler maintenance devices.The disassembly-free in-furnace maintenance platform comprises a pi-shaped boiler body, a lifting control mechanism is installed on the top face of the pi-shaped boiler body, and the inner wall of the pi-shaped boiler body is movably connected with a maintenance platform body; the lifting control mechanism comprises a winch, a horizontal pulley, a vertical pulley, a traction steel wire rope and a fixed support. The hoisting of the maintenance platform is realized through the traction of the traction steel wire rope by the winch, the maintenance platform can be folded in the pi-shaped boiler body by utilizing the turnover arrangement of the main beam mechanism and the folding beam mechanism, and the length of the maintenance platform in the pi-shaped boiler body is adjusted to adapt to the diameter change in the boiler to be attached to the boiler wall; the overhaul platform frame can be close to the boiler wall to facilitate operation, the overhaul platform can build a working table in advance at an inlet below the boiler, related parts are sent into the boiler, the working table is assembled, the scaffold building period is shortened, and the risk that workers fall down from a high position is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of boiler maintenance devices, and in particular to a disassembly-free in-furnace maintenance platform for a π-type boiler. Background Art

[0002] Due to the errors in the design, manufacturing and installation of the heating surface in the boiler furnace and the extremely harsh working environment during the operation of the unit, it must work under high temperature, high pressure and high load conditions, and must withstand the test of oxidation and sulfidation, as well as the erosion and wear of dust particles in the flue gas. Over time, the wall thickness becomes thinner and the mechanical properties decline, which leads to the bursting of the boiler tube. At the same time, according to regulations: power station boilers need to be inspected regularly, which makes it inevitable that the boiler needs to be repaired, minor repairs, medium repairs or major repairs during operation.

[0003] At present, most domestic thermal power units use a full furnace platform built from the slag pit to complete the maintenance task. Due to the structural limitations of the "π" type boiler, the flame angle protrudes inward, and the platform cannot be raised to the top of the furnace, so the relevant heating surfaces are inspected for wear and explosion.

[0004] At present, when carrying out anti-wear and explosion-proof work on the heating surface at the top of the furnace, it is necessary to remove some of the auxiliary beams and frames of the maintenance platform in the furnace. When the platform is raised to the flame-folding angle, the cantilever scaffolding is set up in the large-screen superheater and rear-screen superheater areas with the help of the unremoved part of the platform. The anti-wear and explosion-proof inspectors enter from the manhole door at the horizontal flue and gradually climb to the top of the furnace to carry out anti-wear and explosion-proof work in the relevant areas. The existing maintenance procedures are complicated and tedious, and the construction period is long. It takes 10 people and 3 days to set up the scaffolding at the top of the furnace. There are many dangerous points and a high risk factor. The scaffolding needs scaffolders to work at high altitudes, and the anti-wear and explosion-proof inspectors need to enter from the manhole door at the horizontal flue and gradually climb to the top of the furnace. There is a high risk of falling from heights and falling objects from high altitudes. Summary of the invention

[0005] The purpose of the present invention is to provide a non-disassembly in-furnace maintenance platform for a π-type boiler, so as to solve the problems proposed in the above background technology that the existing maintenance procedures are complicated and cumbersome, the construction period is long, the erection of scaffolding on the top of the furnace is time-consuming and labor-intensive, there are many dangerous points, and the risk factor is high. The erection of the scaffolding requires scaffolders to work at high altitudes, and the anti-wear and explosion-proof inspectors need to enter from the manhole door at the horizontal flue and gradually climb to the top of the furnace, and the risk of falling from heights and falling objects from high altitudes is relatively high.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a non-disassembly in-furnace maintenance platform for a π-type boiler, comprising a π-type boiler body, a lifting control mechanism is installed on the top surface of the π-type boiler body, and the inner wall of the π-type boiler body is movably connected with the maintenance platform, the lifting control mechanism comprises a winch, a horizontal pulley, a vertical pulley, a pulling wire rope and a fixed support, the fixed support is fixedly connected to the top surface of the π-type boiler body, the winch is fixedly installed on the top surface of the fixed support, the horizontal pulley and the vertical pulley are both installed on the outer wall of the fixed support, the horizontal pulley and the vertical pulley are each provided with six, the pulling wire rope is connected between the horizontal pulley and the vertical pulley, and the pulling wire rope is connected to the horizontal pulley and the vertical pulley. One end of the steel wire rope is fixedly connected to the winch, and the other end of the pulling steel wire rope passes through the top surface of the π-type boiler body and is fixedly connected to the maintenance platform. The maintenance platform includes a main beam mechanism, a folding beam mechanism, a hinge and a guide wheel. The folding beam mechanism is arranged at one end of the main beam mechanism, and the hinge is fixedly connected between the main beam mechanism and the folding beam mechanism. The main beam mechanism includes a main beam one, an outer beam and a main beam two. There are eight guide wheels, and the eight guide wheels are respectively installed at the two ends of the main beam one and the main beam two. The outer walls of the main beam one and the main beam two are fixedly connected to the outer wall of the outer beam. A springboard mechanism is installed on the top surface of the main beam mechanism and the folding beam mechanism, and a boarding gate is opened at one end of the springboard mechanism.

[0007] Preferably, four groups of outer beams are provided, and the four outer beams are respectively installed on the four sides of the main beam mechanism, and the outer walls of the outer beams are fixedly connected with railing posts. There are multiple railing posts, and the tops of the railing posts are fixedly connected with cross rails.

[0008] Preferably, the middle outer wall of the outer beam is fixedly connected with an inclined column, the top end of the inclined column is fixedly connected with an inclined steel wire rope, the bottom end of the inclined steel wire rope is fixedly connected with a fixed block, and the fixed block is fixedly connected to the outer wall of the outer beam.

[0009] Preferably, a connecting plate is fixedly connected between the outer walls of the main beam 1 and the main beam 2, and bolts are penetrated through the outer wall of the connecting plate. The bolts are threadedly connected to the main beam mechanism and the hinge.

[0010] Preferably, the springboard mechanism comprises a connecting springboard, a plurality of connecting springboards are provided, and a U-shaped buckle is connected between every two connecting springboards.

[0011] Preferably, a fixing hole is provided through the outer wall of the connecting springboard.

[0012] Preferably, two ends of the U-shaped buckle are respectively plugged into the inner walls of the fixed sockets of the two connecting springboards.

[0013] Preferably, a bottom beam is in contact and connected below the connection point of the two connecting springboards.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the winch is installed and fixed by welding on the top of the π-type boiler body, the winch and horizontal pulleys installed on both sides of the winch are used to guide the pulling wire rope, the bottom end of the pulling wire rope is connected and fixed to the maintenance platform, and the maintenance platform is lifted by pulling the pulling wire rope by the winch, and the maintenance platform can be folded in the π-type boiler body by using the flip setting of the main beam mechanism and the folding beam mechanism, and the length of the maintenance platform in the π-type boiler body is adjusted to adapt to the change in the diameter of the furnace and fit the furnace wall. The frame of the maintenance platform can be close to the furnace wall for easy operation, and the maintenance platform can pre-build a workbench at the entrance below the boiler, and the relevant components are sent into the furnace and assembled on the workbench, which can be conveniently and quickly built, shortening the scaffolding erection period, leaving sufficient time for subsequent maintenance work, and reducing the risk of workers falling from heights.

[0015] 2. In the present invention, the guide wheels are provided to facilitate the contact and movement between the edge of the maintenance platform and the furnace wall, thereby facilitating the lifting and lowering control of the maintenance platform in the π-type boiler body. The platform can reach the top of the furnace with only the folding beams folded up. The staff can take the maintenance platform in the furnace directly to the working surface on the top of the furnace, reducing the risk of falling from heights and greatly improving safety.

[0016] 3. In the present invention, by installing guardrails on the outer beams at the edge of the maintenance platform, the edge of the platform is blocked and protected, thereby preventing maintenance personnel from falling during construction. By using the inclined columns and inclined steel wire ropes, the load on the maintenance platform can be effectively dispersed, and the force can be transferred to the outer beams through the inclined columns, thereby improving the stability and seismic resistance of the entire structure, making it easier for maintenance personnel to perform maintenance operations more stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the internal structure of a π-type boiler body of a non-disassembly in-furnace maintenance platform of a π-type boiler of the present invention; Figure 2 It is a structural schematic diagram of a lifting control mechanism of a non-disassembly type in-furnace maintenance platform of a π-type boiler of the present invention; Figure 3 It is a structural schematic diagram of a maintenance platform of a non-disassembly-type in-furnace maintenance platform of a π-type boiler of the present invention; Figure 4 It is a structural schematic diagram of a main beam mechanism of a non-disassembly-type in-furnace maintenance platform of a π-type boiler of the present invention; Figure 5 It is a schematic diagram of the connection structure of a connecting plate of a non-disassembly type in-furnace maintenance platform of a π-type boiler of the present invention; Figure 6 It is a structural schematic diagram of an outer beam of a non-disassembly-type in-furnace maintenance platform of a π-type boiler of the present invention; Figure 7 It is a structural schematic diagram of a non-disassembly-type in-furnace maintenance platform springboard mechanism of a π-type boiler of the present invention; Figure 8 The present invention is a schematic diagram of the connection structure of a non-disassembly-type in-furnace maintenance platform connected to a springboard of a π-type boiler.

[0018] In the figure: 1. π-type boiler body; 2. lifting control mechanism; 21. winch; 22. horizontal pulley; 23. vertical pulley; 24. pulling wire rope; 25. fixed support; 3. maintenance platform; 31. main beam mechanism; 311. main beam one; 312. outer beam; 313. main beam two; 314. horizontal railing; 315. railing column; 316. inclined wire rope; 317. inclined column; 318. fixed block; 32. folding beam mechanism; 33. hinge; 34. guide wheel; 35. boarding gate; 36. springboard mechanism; 361. connecting springboard; 362. bottom beam; 363. fixing socket; 364. U-shaped buckle; 37. connecting plate; 371. bolt. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example 1: Reference Figure 1 - Figure 8As shown: a non-disassembly in-furnace maintenance platform for a π-type boiler, comprising a π-type boiler body 1, a lifting control mechanism 2 is installed on the top surface of the π-type boiler body 1, and an inspection platform 3 is movably connected to the inner wall of the π-type boiler body 1, the lifting control mechanism 2 comprises a winch 21, a horizontal pulley 22, a vertical pulley 23, a pulling wire rope 24 and a fixed support 25, the fixed support 25 is fixedly connected to the top surface of the π-type boiler body 1, the winch 21 is fixedly installed on the top surface of the fixed support 25, the horizontal pulley 22 and the vertical pulley 23 are both installed on the outer wall of the fixed support 25, the horizontal pulley 22 and the vertical pulley 23 are both provided with six, the pulling wire rope 24 is connected between the horizontal pulley 22 and the vertical pulley 23, one end of the pulling wire rope 24 is fixedly connected to the winch 21, and the pulling wire rope 24 is connected to the horizontal pulley 22 and the vertical pulley 23. The other end of the wire rope 24 passes through the top surface of the π-shaped boiler body 1 and is fixedly connected to the maintenance platform 3. The maintenance platform 3 includes a main beam mechanism 31, a folding beam mechanism 32, a hinge 33 and a guide wheel 34. The folding beam mechanism 32 is arranged at one end of the main beam mechanism 31, and the hinge 33 is fixedly connected between the main beam mechanism 31 and the folding beam mechanism 32. The main beam mechanism 31 includes a main beam 1 311, an outer beam 312 and a main beam 2 313. There are eight guide wheels 34, and the eight guide wheels 34 are respectively installed at the two ends of the main beam 1 311 and the main beam 2 313. The outer walls of the main beam 1 311 and the main beam 2 313 are fixedly connected to the outer wall of the outer beam 312. A springboard mechanism 36 is installed on the top surface of the main beam mechanism 31 and the folding beam mechanism 32, and a boarding gate 35 is opened at one end of the springboard mechanism 36.

[0021] In this embodiment, when in use, the winch 21 is installed and fixed by welding the fixed support 25 to the top of the π-type boiler body 1, and the winch 21 and the horizontal pulley 22 respectively installed on both sides of the winch 21 are used to guide the pulling wire rope 24. The bottom end of the pulling wire rope 24 is connected and fixed to the maintenance platform 3. The winch 21 pulls the pulling wire rope 24 to lift the maintenance platform 3. By using the flip setting of the main beam mechanism 31 and the folding beam mechanism 32, the maintenance platform 3 can be folded in the π-type boiler body 1. The length of the maintenance platform 3 in the π-type boiler body 1 is adjusted to adapt to the change in the diameter of the furnace and fit the furnace wall. The frame of the maintenance platform can be close to the furnace wall for easy operation, and the maintenance platform 3 can pre-build a workbench at the entrance below the boiler. The relevant components are sent into the furnace and assembled on the workbench, which can be conveniently and quickly built, avoiding the climbing and climbing of traditional maintenance and improving the safety of maintenance. The setting of the guide wheel 34 facilitates the contact and movement of the edge of the maintenance platform 3 with the furnace wall, thereby facilitating the lifting and lowering control of the maintenance platform 3 in the π-type boiler body 1.

[0022] Embodiment 2: Figure 4 and Figure 6As shown, four groups of outer beams 312 are provided, and four outer beams 312 are respectively installed on the four sides of the main beam mechanism 31, and the outer wall of the outer beam 312 is fixedly connected with a railing column 315, and a plurality of railing columns 315 are provided. The top of the railing column 315 is fixedly connected with a cross railing 314, and the middle outer wall of the outer beam 312 is fixedly connected with a diagonal column 317, and the top of the diagonal column 317 is fixedly connected with a diagonal steel wire rope 316, and the bottom end of the diagonal steel wire rope 316 is fixedly connected with a fixed block 318, and the fixed block 318 is fixedly connected to the outer wall of the outer beam 312.

[0023] In this embodiment, a guardrail is installed on the outer beam 312 at the edge of the maintenance platform 3 through the combined installation of the horizontal railing 314 and the railing column 315, so as to block and protect the edge of the platform, thereby preventing maintenance personnel from falling during construction. In combination with the arrangement of the inclined columns 317 and the inclined steel wire ropes 316, the load on the maintenance platform 3 can be effectively dispersed, and the force can be transferred to the outer beam 312 through the inclined columns 317, thereby improving the stability and seismic resistance of the entire structure, making it easier for maintenance personnel to perform maintenance operations more stably.

[0024] Embodiment 3: According to Figure 4 - Figure 8 As shown, a connecting plate 37 is fixedly connected between the outer walls of the main beam 1 311 and the main beam 2 313, and a bolt 371 is connected through the outer wall of the connecting plate 37, and the bolt 371 is threadedly connected to the main beam mechanism 31 and the hinge 33. The springboard mechanism 36 includes a connecting springboard 361, and a plurality of connecting springboards 361 are provided, and a U-shaped buckle 364 is connected between every two connecting springboards 361. A fixed socket 363 is penetrated through the outer wall of the connecting springboard 361, and the two ends of the U-shaped buckle 364 are respectively inserted into the inner walls of the fixed sockets 363 of the two connecting springboards 361, and the bottom of the connection between the two connecting springboards 361 is contacted and connected with a bottom beam 362.

[0025] In this embodiment, the connection plate 37 and the bolt 371 are provided to facilitate the user to assemble and fix the main beam 1 311 and the main beam 2 313, thereby achieving fixation between the beams. The U-shaped buckle 364 is plugged and fixed with the fixing sockets 363 of two adjacent connecting springboards 361, so that multiple groups of connecting springboards 361 are assembled and fixed on the bottom beam 362. The boarding gate 35 is provided to facilitate the user to stand on the springboard mechanism 36 to perform relevant maintenance operations.

[0026] The method of use and working principle of this device are as follows: the fixed support 25 is welded to the top of the π-type boiler body 1 in advance, and the horizontal pulleys 22 and the vertical pulleys 23 on both sides are used to lower the pulling wire rope 24 from the top of the π-type boiler body 1 to the bottom of the furnace, and the bottom end of the pulling wire rope 24 is connected and fixed to the maintenance platform 3, and the pulling of the pulling wire rope 24 by the winch 21 is used to lift the maintenance platform 3, and the flipping setting of the main beam mechanism 31 and the folding beam mechanism 32 is utilized to make the maintenance platform 3 foldable in the π-type boiler body 1, and the length of the maintenance platform 3 in the π-type boiler body 1 is adjusted to adapt to the change in the diameter of the furnace and fit the furnace wall, and the frame of the maintenance platform can be close to the furnace wall for easy operation, and the maintenance platform 3 can be pre-built with a workbench at the entrance below the boiler, and the relevant components are sent into the furnace and assembled on the workbench, which can be conveniently and quickly built, avoiding the climbing and ascending of traditional maintenance, and improving the safety of maintenance. The arrangement facilitates the contact and movement between the edge of the maintenance platform 3 and the furnace wall, thereby facilitating the lifting and lowering control of the maintenance platform 3 in the π-type boiler body 1. Through the combined installation of the horizontal railing 314 and the railing column 315, a guardrail is installed on the outer beam 312 at the edge of the maintenance platform 3 to block and protect the edge of the platform, thereby preventing maintenance personnel from falling during construction. In conjunction with the arrangement of the inclined columns 317 and the inclined steel wire ropes 316, the load on the maintenance platform 3 can be effectively dispersed, and the force can be transmitted to the outer beam 312 through the inclined columns 317, thereby improving the stability and seismic resistance of the entire structure. Through the arrangement of the connecting plate 37 and the bolts 371, it is convenient for the user to assemble and fix the main beam 1 311 and the main beam 2 313 to achieve fixation between the beams. By using the U-shaped buckle 364 to plug and fix with the fixing sockets 363 of two adjacent connecting springboards 361, multiple groups of connecting springboards 361 are assembled and fixed on the bottom beam 362.

[0027] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A non-disassembly in-furnace maintenance platform for a π-type boiler, comprising a π-type boiler body (1), characterized in that: The top surface of the π-shaped boiler body (1) is provided with a lifting control mechanism (2), the inner wall of the π-shaped boiler body (1) is movably connected with a maintenance platform (3), the lifting control mechanism (2) comprises a winch (21), a horizontal pulley (22), a vertical pulley (23), a pulling steel wire rope (24) and a fixed support (25), the fixed support (25) being fixedly connected to the top surface of the π-shaped boiler body (1), the winch (21) being fixedly installed on the fixed support The top surface of the fixed support (25), the horizontal pulley (22) and the vertical pulley (23) are both installed on the outer wall of the fixed support (25), and the horizontal pulley (22) and the vertical pulley (23) are each provided with six, the pulling wire rope (24) is connected between the horizontal pulley (22) and the vertical pulley (23), one end of the pulling wire rope (24) is fixedly connected to the winch (21), and the other end of the pulling wire rope (24) passes through the π-shaped boiler body. The top surface of the main beam mechanism (1) is fixedly connected to the maintenance platform (3), the maintenance platform (3) comprising a main beam mechanism (31), a folding beam mechanism (32), a hinge (33) and a guide wheel (34), the folding beam mechanism (32) being arranged at one end of the main beam mechanism (31), the hinge (33) being fixedly connected between the main beam mechanism (31) and the folding beam mechanism (32), the main beam mechanism (31) comprising a main beam 1 (311), an outer beam (312) and a main beam 2 (313), eight guide wheels (34) are provided, and the eight guide wheels (34) are respectively installed at the two ends of the main beam one (311) and the main beam two (313), the outer walls of the main beam one (311) and the main beam two (313) are fixedly connected to the outer wall of the outer beam (312), and a springboard mechanism (36) is installed on the top surface of the main beam mechanism (31) and the folding beam mechanism (32), and a boarding gate (35) is opened at one end of the springboard mechanism (36).

2. The non-disassembly in-furnace maintenance platform for a π-type boiler according to claim 1 is characterized in that: Four groups of the outer beams (312) are provided, and the four outer beams (312) are respectively installed on four sides of the main beam mechanism (31). The outer walls of the outer beams (312) are fixedly connected to railing posts (315). A plurality of railing posts (315) are provided, and the top ends of the railing posts (315) are fixedly connected to horizontal railings (314).

3. The non-disassembly in-furnace maintenance platform of a π-type boiler according to claim 2 is characterized in that: The middle outer wall of the outer beam (312) is fixedly connected to an inclined column (317), the top end of the inclined column (317) is fixedly connected to an inclined steel wire rope (316), the bottom end of the inclined steel wire rope (316) is fixedly connected to a fixed block (318), and the fixed block (318) is fixedly connected to the outer wall of the outer beam (312).

4. The non-disassembly in-furnace maintenance platform for a π-type boiler according to claim 1 is characterized in that: A connecting plate (37) is fixedly connected between the outer walls of the first main beam (311) and the second main beam (313), a bolt (371) is passed through the outer wall of the connecting plate (37), and the bolt (371) is threadedly connected to the main beam mechanism (31) and the hinge (33).

5. The non-disassembly in-furnace maintenance platform for a π-type boiler according to claim 1 is characterized in that: The springboard mechanism (36) comprises a connecting springboard (361), a plurality of connecting springboards (361) are provided, and a U-shaped buckle (364) is connected between every two connecting springboards (361).

6. The non-disassembly in-furnace maintenance platform of a π-type boiler according to claim 5 is characterized in that: A fixing plug hole (363) is formed through the outer wall of the connecting springboard (361).

7. The non-disassembly in-furnace maintenance platform of a π-type boiler according to claim 6 is characterized by: The two ends of the U-shaped buckle (364) are respectively plugged into the inner walls of the fixed plug holes (363) of the two connecting springboards (361).

8. The non-disassembly in-furnace maintenance platform for a π-type boiler according to claim 7 is characterized in that: A bottom beam (362) is in contact and connected below the connection point of the two connecting springboards (361).

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