In-furnace hanging screen lifting platform of fluidized bed boiler

Abstract

The utility model belongs to the technical field of supercritical circulating fluidized bed boilers, and particularly relates to an in-furnace hanging screen lifting platform of a fluidized bed boiler, which comprises a fixing block, a bottom plate is arranged below the fixing block, a lifting component is arranged in the bottom plate, a connecting end of the lifting component is arranged at the lower end of the fixing block, a fence is arranged on the bottom plate, and the fixing block is arranged on the fence. A fixing assembly is arranged in the fixing block; the lifting assembly comprises a first motor, the first motor is arranged in the bottom plate, a first gear is arranged at the output end of the first motor, one end of a driving shaft is arranged on one side of the first motor, the other end of the driving shaft is rotationally arranged on the inner side wall of the bottom plate, and the driving shaft is sleeved with a first winding disc. The utility model provides an in-furnace hanging screen lifting platform of a fluidized bed boiler, which can greatly save the time for erecting a scaffold and shorten the maintenance time.

Description

Technical Field

[0001] The utility model belongs to the technical field of supercritical circulating fluidized bed boilers, and specifically refers to a lifting platform for the hanging screen inside a fluidized bed boiler. Background Art

[0002] The high-temperature superheater of a supercritical circulating fluidized bed boiler is suspended in the upper middle part of the front wall of the furnace by a membrane wall structure, and the material is SA-213TP347H. After the boiler has been operating for several years, due to the long-term expansion and contraction of the high-temperature superheater tube screen material, reheat cracks are likely to occur. In addition, the TP347H material has a large amount of expansion. Due to uneven heating, the hanging screen will have excessive thermal stress and distort. Once the tube screen deforms too much, the in-furnace maintenance platform will get stuck at the deformed position during the process of rising from the bottom to the top, resulting in the inability to rise, and further causing the tube screen above the lifting platform to be unable to be comprehensively inspected and maintained.

[0003] Affected by factors such as thermal stress, construction, and load fluctuations, the high-temperature superheater tube screen is extremely likely to generate cracks in the stress concentration area, leading to leakage. Once the high-temperature superheater tube screen leaks during the operation of the boiler, it will inevitably cause the unit to shut down unexpectedly. At the same time, the leakage of the high-temperature superheater tube screen will also scour the opposite tube screen, resulting in the rapid expansion of the leakage and increasing the maintenance period and cost. Therefore, whether it is during normal maintenance inspections or emergency repairs during boiler outages, people need to reach all tube screen areas. If a full-furnace steel pipe scaffold is erected, the cost is high and the construction period is long, making it difficult to meet the maintenance period stipulated by the dispatching. Summary of the Utility Model

[0004] In order to solve the above problems, the utility model proposes a lifting platform for the hanging screen inside a fluidized bed boiler.

[0005] The technical solution adopted by the utility model is as follows: The utility model provides a lifting platform for the hanging screen inside a fluidized bed boiler, including a fixed block. A bottom plate is provided below the fixed block. An elevating assembly is provided inside the bottom plate. The connecting end of the elevating assembly is provided at the lower end of the fixed block. A fence is provided on the bottom plate. A fixing assembly is provided inside the fixed block.

[0006] Further, the elevating assembly includes a first motor. The first motor is provided inside the bottom plate. The output end of the first motor is provided with a first gear. One end of a drive shaft is provided on one side of the first motor. The other end of the drive shaft is rotatably provided on the inner side wall of the bottom plate. A winding disc one is sleeved on the drive shaft. A second rope is wound on the winding disc one. A fixing block one is provided inside the bottom plate. The fixing block one is provided on one side of the first motor. One end of a rotating shaft is rotatably provided at one end of the fixing block one. The other end of the rotating shaft is rotatably provided on the inner side wall of the bottom plate. A second gear is sleeved on the rotating shaft. A chain is wound around the second gear. A chain is wound around the first gear. A winding disc two is sleeved on the rotating shaft. A first rope is wound on the winding disc two.

[0007] Further, the fixing component includes a second fixing block which is arranged inside the first fixing block. A support pipe is slidably sleeved inside the second fixing block. One end of the support pipe is provided with a sleeve. A slider is arranged at the lower end of the side wall of the sleeve. A chute is arranged at the bottom end inside the first fixing block. The slider is slidably arranged inside the chute. A lead screw is sleeved inside the sleeve. The sleeve is in threaded connection with the lead screw. The other end of the lead screw is provided with a fourth gear. A second motor is arranged at the bottom end inside the first fixing block. The output end of the second motor is provided with a third gear. The third gear and the fourth gear are meshed and rotationally connected. The limiting sleeve is sleeved on the lead screw, and the upper end of the limiting sleeve is connected to the upper end inside the first fixing block.

[0008] Further, a rope outlet hole is formed in the bottom plate, and a second rope is arranged inside the rope outlet hole.

[0009] Further, a fixing ring is arranged on the side wall of the fence, and a second rope is arranged inside the fixing ring.

[0010] Further, the limiting sleeve is a bearing.

[0011] The beneficial effects achieved by the present utility model adopting the above structure are as follows:

[0012] (1) It can greatly save the time for erecting the scaffolding and shorten the maintenance time.

[0013] (2) It greatly improves the safety of the maintenance work. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is the front view of the in-furnace hanging screen lifting platform of the fluidized bed boiler of the present utility model;

[0016] Figure 2 It is the front sectional view of the in-furnace hanging screen lifting platform of the fluidized bed boiler of the present utility model;

[0017] Figure 3 It is the left view of the in-furnace hanging screen lifting platform of the fluidized bed boiler of the present utility model;

[0018] Figure 4 It is the top sectional view of the bottom plate;

[0019] Figure 5 It is Figure 2 The partial enlarged view of part A in

[0020] Figure 6 For Figure 4 Partial enlarged view of part B in it.

[0021] Among them, 1. Fixed block, 2. Base plate, 3. Rope outlet hole, 4. Fence, 5. Fixed ring, 8. Motor 1, 9. Gear 1, 10. Fixed block 1, 11. Rotating shaft, 12. Gear 2, 13. Winding disc 1, 14. Winding disc 2, 15. Rope 1, 16. Rope 2, 17. Motor 2, 18. Slide groove, 19. Slide block, 20. Sleeve, 21. Fixed block 2, 22. Support pipe, 23. Gear 3, 24. Gear 4, 25. Lead screw, 26. Limit kit, 27. Chain, 28. Drive shaft. Specific implementation manner

[0022] To make the objectives, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the specific embodiments of the present utility model. Obviously, the embodiments described below are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of this patent.

[0023] Such as Figures 1 - 6As shown in the figure, the present utility model proposes a lifting platform for a hanging screen inside a fluidized bed boiler, which includes a fixed block 1. A bottom plate 2 is provided below the fixed block 1. A rope outlet hole 3 is opened on the bottom plate 2. A second rope 16 is provided in the rope outlet hole 3. A second rope 16 is provided in the rope outlet hole 3. A lifting assembly is provided inside the bottom plate 2. The lifting assembly includes a first motor 8 which is arranged inside the bottom plate 2. A first gear 9 is provided at the output end of the first motor 8. One end of a drive shaft 28 is provided on one side of the first motor 8. The other end of the drive shaft 28 is rotatably arranged on the inner side wall of the bottom plate 2. A first winding disc 13 is sleeved on the drive shaft 28. The second rope 16 is wound on the first winding disc 13. A first fixing block 10 is provided inside the bottom plate 2. The first fixing block 10 is arranged on one side of the first motor 8. One end of a rotating shaft 11 is rotatably arranged at one end of the first fixing block 10. The other end of the rotating shaft 11 is rotatably arranged on the inner side wall of the bottom plate 2. A second gear 12 is sleeved on the rotating shaft 11. A chain 27 is wound around the second gear 12. The chain 27 is wound around the first gear 9. A second winding disc 14 is sleeved on the rotating shaft 11. A first rope 15 is wound on the second winding disc 14. The connecting end of the lifting assembly is arranged at the lower end of the fixed block 1. A fence 4 is provided on the bottom plate 2. A fixing ring 5 is provided on the side wall of the fence 4. The second rope 16 is provided inside the fixing ring 5. A fixing assembly is provided inside the fixed block 1. The fixing assembly includes a second fixing block 21 which is arranged inside the fixed block 1. A support tube 22 is slidably sleeved inside the second fixing block 21. One end of the support tube 22 is provided with a sleeve 20. A slider 19 is provided at the lower end of the side wall of the sleeve 20. A chute 18 is provided at the inner bottom end of the fixed block 1. The slider 19 is slidably arranged inside the chute 18. A lead screw 25 is sleeved inside the sleeve 20. The sleeve 20 and the lead screw 25 are in threaded connection. A fourth gear 24 is provided at the other end of the lead screw 25. A second motor 17 is provided at the inner bottom end of the fixed block 1. A third gear 23 is provided at the output end of the second motor 17. The third gear 23 and the fourth gear 24 are meshed and rotatably connected. A limiting sleeve 26 is sleeved on the lead screw 25. The upper end of the limiting sleeve 26 is connected to the inner upper end of the fixed block 1. The limiting sleeve 26 is a bearing.

[0024] During actual use, the maintenance scaffolding is not erected from the bottom of the furnace. Instead, it starts from the highest point that the lifting platform can reach. Use a plasma cutting machine to appropriately cut 2 hanging plate holes on the fin part between the tube screens. The rotation of the output end of motor two 17 drives the rotation of gear three 23. The rotation of gear three 23 drives the rotation of gear four 24. The rotation of gear four 24 drives the rotation of lead screw 25. The rotation of lead screw 25 pushes sleeve 20 to move. The movement of sleeve 20 pushes support tube 22 to move. Insert one end of support tube 22 into the hole in the fin part to complete the fixation of fixing block 1. The rotation of the output end of motor one 8 drives the rotation of gear one 9. The rotation of gear one 9 drives the rotation of chain 27 and winding disc one 13. The rotation of winding disc one 13 extends rope two 16. The rotation of chain 27 drives the rotation of gear two 12. The rotation of gear two 12 drives the rotation of winding disc two 14. The rotation of winding disc two 14 extends rope one 15. The furnace is inspected from top to bottom. Repeat this step during the next use.

[0025] As can be seen from the above embodiments, the beneficial effects of the present utility model are as follows:

[0026] It can greatly save the time for erecting the scaffolding and shorten the maintenance time; it greatly improves the safety of the maintenance work.

[0027] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Fluidized bed boiler furnace hanging screen lifting platform, characterized by: The invention comprises a fixed block (1), a bottom plate (2) is provided below the fixed block (1), a lifting component is provided inside the bottom plate (2), a connection end of the lifting component is provided at the lower end of the fixed block (1), a fence (4) is provided on the bottom plate (2), and a fixing component is provided inside the fixed block (1).

2. The lifting platform for hanging screen in a fluidized bed boiler according to claim 1 is characterized in that: The lifting assembly comprises a motor (8), the motor (8) being arranged in the bottom plate (2), a gear (9) being arranged at the output end of the motor (8), one end of a driving shaft (28) being arranged on one side of the motor (8), the other end of the driving shaft (28) being rotatably arranged on the inner side wall of the bottom plate (2), a winding disk (13) being sleeved on the driving shaft (28), a rope (16) being wound on the winding disk (13), a fixing block (10) being arranged in the bottom plate (2), the fixing block (10) being arranged on the inner side wall of the bottom plate (2), and a fixing block (11) being arranged on the inner side wall of the bottom plate (2). (10) is arranged on one side of the motor one (8), one end of the fixed block one (10) is rotatably provided with one end of the rotating shaft (11), the other end of the rotating shaft (11) is rotatably provided on the inner wall of the bottom plate (2), the rotating shaft (11) is sleeved with a gear two (12), the gear two (12) is wound with a chain (27), the gear one (9) is wound with a chain (27), the rotating shaft (11) is sleeved with a winding disk two (14), and the winding disk two (14) has a rope one (15) wound on it.

3. The lifting platform for hanging screen in a fluidized bed boiler according to claim 2 is characterized in that: The fixing assembly comprises a second fixing block (21), the second fixing block (21) being arranged in the fixing block (1), a support tube (22) being slidably sleeved in the second fixing block (21), a sleeve (20) being arranged at one end of the support tube (22), a slide block (19) being arranged at the lower end of the side wall of the sleeve (20), a slide groove (18) being arranged at the inner bottom end of the fixing block (1), a slide block (19) being slidably arranged in the slide groove (18), a lead screw (22) being sleeved in the sleeve (20) 5), the sleeve (20) and the lead screw (25) are threadedly connected, the other end of the lead screw (25) is provided with a gear four (24), the inner bottom end of the fixed block (1) is provided with a motor two (17), the output end of the motor two (17) is provided with a gear three (23), the gear three (23) and the gear four (24) are meshed and rotatably connected, the limit kit (26) is sleeved on the lead screw (25), and the upper end of the limit kit (26) is connected to the inner upper end of the fixed block (1).

4. The lifting platform for hanging screen in a fluidized bed boiler according to claim 3 is characterized in that: The bottom plate (2) is provided with a rope outlet hole (3), and a rope 2 (16) is arranged in the rope outlet hole (3).

5. The lifting platform for hanging screen in a fluidized bed boiler according to claim 4 is characterized in that: A fixing ring (5) is provided on the side wall of the fence (4), and a second rope (16) is provided inside the fixing ring (5).

6. The lifting platform for hanging screen in a fluidized bed boiler according to claim 5 is characterized in that: The limiting kit (26) is a bearing.

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