A self-sealing dismounting auxiliary device for high-pressure heater of thermal power plant

Abstract

The utility model discloses a kind of thermal power plant high-pressure heater self-sealing dismounting auxiliary device, it is related to high-pressure heater dismounting technical field, including chassis, the top of chassis is fixedly installed with stand, stand is provided with two, the top of two stand is fixedly installed with crossbeam, limit slot is all set on the side wall of the both sides of crossbeam, movable seat is movably installed on the outside of crossbeam lower part, the both sides of movable seat upper part are all fixed with limit block, the lower end of movable seat is fixed with connecting ring, the lower of connecting ring is installed with chain hoist assembly, the top of chassis is installed with work platform, the both sides of work platform are fixed with support frame, the suspension mode of this auxiliary device is changed from horizontal suspension to vertical suspension, during dismounting, personnel can stand on platform and dismount suspension part, avoid climbing operation, improve the safety reliability when self-sealing device is dismounted, reduce personnel labor intensity, improve labor efficiency simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure heater disassembly and assembly technology, specifically a self-sealing disassembly and assembly auxiliary device for high-pressure heaters in thermal power plants. Background Technology

[0002] High-pressure heaters are core equipment in the regenerative systems of thermal power plants. They utilize the heat from the steam extracted from the turbine to heat the boiler feedwater, reducing boiler fuel consumption, lowering power generation costs, preventing stress concentration on the boiler heating surfaces due to excessively low feedwater temperatures, and extending equipment lifespan. Through staged heating, they maximize the utilization of extracted steam heat. Because of the high pressure, the manhole doors of high-pressure heaters in thermal power plants are generally self-sealing. To ensure the safe operation of the unit, inspection and maintenance are required during each overhaul. During the overhaul of the high-pressure heater unit, the manhole must be opened for inspection and maintenance.

[0003] The existing disassembly and assembly auxiliary device uses a method of hanging a hand-operated hoist at a fixed point on one side, removing the equalizing ring and the four-ring, and then pulling it outwards. If the heater becomes pressurized or the pulling is misaligned, it will waste a lot of manpower and effort, and it is also very easy to cause the self-sealing device to suddenly pop out and cause injury, which reduces the disassembly and assembly effect and cannot meet the usage requirements. Utility Model Content

[0004] The purpose of this utility model is to provide a self-sealing disassembly and assembly auxiliary device for high-pressure heaters in thermal power plants, in order to solve the problems mentioned in the background art. The existing disassembly and assembly auxiliary devices use a method of hanging a hand-operated hoist at a fixed point on one side, removing the equalizing ring and the four-ring, and then pulling it outward. If the heater becomes pressurized or the pulling is misaligned, it will waste a lot of manpower and effort, and it is also very easy to cause the self-sealing device to suddenly jump out and cause injury, which reduces the disassembly and assembly effect and cannot meet the usage requirements.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a self-sealing disassembly and assembly auxiliary device for a high-pressure heater in a thermal power plant, comprising a base frame, two columns fixedly installed on the top of the base frame, the two columns being arranged symmetrically, a crossbeam fixedly installed on the top of the two columns, limit grooves provided on the side walls of both sides of the crossbeam, a movable seat movably installed on the lower part of the crossbeam, limit blocks fixed on both sides of the upper part of the movable seat, the limit blocks being disposed inside the limit grooves and slidably connected to the crossbeam, a connecting ring fixed at the lower end of the movable seat, a hand chain hoist assembly installed below the connecting ring and snapped together with the connecting ring, a working platform installed on the top of the base frame, the working platform being disposed on one side of the columns, support frames fixed on both sides of the working platform and fixedly connected to the base frame.

[0006] Preferably, a toothed rack is fixed at the lower end of the crossbeam, a rotating groove is provided at the center of the movable seat, a gear is rotatably installed inside the rotating groove, the gear is located below the toothed rack and meshes with the toothed rack, a motor is fixed on one side of the movable seat, and the telescopic end of the motor is connected to the gear.

[0007] Preferably, a plurality of rollers are rotatably mounted on the inner side of the upper end of the movable seat, and the rollers are arranged horizontally side by side. The rollers are located inside the limiting groove and are in contact with the bottom of the limiting groove.

[0008] Preferably, a traveling wheel is installed at the bottom of each of the four corners of the base frame, and the traveling wheel is connected to the base frame by screws.

[0009] Preferably, a fixed plate is installed on one side of the walking wheel, and a hydraulic cylinder is installed above the fixed plate. The hydraulic cylinder is connected to the base frame by screws, and the telescopic end of the hydraulic cylinder is slidably connected to the base frame and connected to the fixed plate.

[0010] Preferably, a step assembly is installed below one end of the work platform, and the step assembly is connected to the work platform by screws.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model device is configured with a movable base, a hand chain hoist assembly, a connecting ring, traveling wheels, a fixed plate, and a hydraulic cylinder. The hand chain hoist assembly is connected to the movable base via the connecting ring. The traveling wheels support the device and facilitate its movement. The hand chain hoist assembly is connected to a self-sealing structure. When the device moves away from the high-pressure heater, the hand chain hoist assembly applies a pulling force to the self-sealing structure, causing the disassembled self-sealing structure to be moved laterally. Once the self-sealing structure is completely removed, the hand chain hoist assembly is suspended. The hydraulic cylinder drives the fixed plate to descend and contact the ground, securing the device with the help of the fixed plate and ensuring the overall stability of the device when the self-sealing structure is removed.

[0013] 2. This utility model device, through the setting of a working platform and a step assembly, facilitates workers to go up and down the working platform. When the self-sealing structure is removed, workers can climb onto the working platform, avoiding working at height and improving inherent safety.

[0014] 3. This utility model device, through the arrangement of a motor, a gear rack, and gears, allows the motor to drive the gears to rotate. As the gears rotate, they apply a pushing or pulling force to the moving seat, causing the moving seat to move laterally along the crossbeam. This changes the installation position of the hand chain hoist assembly, placing the hand chain hoist assembly and the self-sealing structure on the same vertical plane, thus better suspending the self-sealing structure and improving the completeness of disassembly and assembly of the self-sealing structure. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 For the present utility model Figure 1 A magnified view of a portion of area A;

[0017] Figure 3 This is a diagram showing the connection between the movable seat and the crossbeam of this utility model;

[0018] Figure 4 For the present utility model Figure 1 A magnified view of a portion of area B.

[0019] In the diagram: 1. Base frame; 2. Column; 3. Working platform; 4. Support frame; 5. Crossbeam; 6. Limiting groove; 7. Moving seat; 8. Hand chain hoist assembly; 9. Connecting ring; 10. Motor; 11. Roller; 12. Gear rack; 13. Rotating groove; 14. Gear; 15. Traveling wheel; 16. Fixed plate; 17. Hydraulic cylinder; 18. Limiting block; 19. Step assembly. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Please see Figure 1-4 This utility model provides an embodiment of a self-sealing disassembly and assembly auxiliary device for a high-pressure heater in a thermal power plant, comprising a base frame 1, two columns 2 fixedly installed on the top of the base frame 1, the two columns 2 being arranged symmetrically, a crossbeam 5 fixedly installed on the top of the two columns 2, limit grooves 6 being provided on the side walls of both sides of the crossbeam 5, a movable seat 7 being movably installed on the lower part of the crossbeam 5, limit blocks 18 being fixed on both sides of the upper part of the movable seat 7, the limit blocks 18 being disposed inside the limit grooves 6 and slidably connected to the crossbeam 5, a connecting ring 9 being fixed at the lower end of the movable seat 7, and a hand chain hoist being installed below the connecting ring 9. Component 8 is attached to the hand chain hoist and is snapped together with the connecting ring 9. A working platform 3 is installed on the top of the base frame 1 and is located on one side of the column 2. Support frames 4 are fixed on both sides of the working platform 3 and are fixedly connected to the base frame 1. A traveling wheel 15 is installed at the bottom of each of the four corners of the base frame 1 and is connected to the base frame 1 by screws. A fixed plate 16 is installed on one side of the traveling wheel 15 and a hydraulic cylinder 17 is installed on the top of the fixed plate 16. The hydraulic cylinder 17 is connected to the base frame 1 by screws. The telescopic end of the hydraulic cylinder 17 is slidably connected to the base frame 1 and is connected to the fixed plate 16.

[0022] In use: Move the device to one side of the high-pressure heater inlet using the walking wheels 15. The operator stands on the work platform 3 to work. After the operator removes the equalizing ring and the four-way ring, the self-sealing structure is pulled out by a screw and nut-like structure. Move the device away from the high-pressure heater and move the removed self-sealing structure out laterally. Connect the hand chain hoist assembly 8 to the self-sealing structure and suspend the removed self-sealing structure. When disassembling the self-sealing structure, drive the hydraulic cylinder 17 to drive the fixed plate 16 to fall and contact the ground. Use the fixed plate 16 to fix the device and ensure the overall stability of the device when disassembling the self-sealing structure.

[0023] Please see Figure 1 , Figure 2 and Figure 3 A toothed rack 12 is fixed at the lower end of the crossbeam 5. A rotating groove 13 is provided at the center of the movable seat 7. A gear 14 is rotatably installed inside the rotating groove 13. The gear 14 is located below the toothed rack 12 and meshes with the toothed rack 12. A motor 10 is fixed on one side of the movable seat 7, and the telescopic end of the motor 10 is connected to the gear 14. Multiple rollers 11 are rotatably installed on the inner side of the upper end of the movable seat 7. The rollers 11 are arranged horizontally side by side and are located inside the limiting groove 6. The rollers 11 are in contact with the bottom of the limiting groove 6. The motor 10 drives the gear 14 to rotate. As the gear 14 rotates, it applies a pushing and pulling force to the movable seat 7, causing the movable seat 7 to move laterally along the crossbeam 5. This changes the installation position of the hand chain hoist assembly 8, placing the hand chain hoist assembly 8 and the self-sealing structure on the same vertical plane, which better suspends the self-sealing structure and improves the completeness of the self-sealing structure's assembly and disassembly.

[0024] Please see Figure 1 A step assembly 19 is installed at the bottom of one end of the work platform 3, and the step assembly 19 is connected to the work platform 3 by screws. The step assembly 19 facilitates workers to go up and down the work platform 3.

[0025] Working principle: The device is moved to one side of the high-pressure heater inlet using the traveling wheels 15. The hydraulic cylinder 17 drives the fixed plate 16 to descend and contact the ground, fixing the device. The worker climbs onto the work platform 3 via the step assembly 19. After removing the equalizing ring and the four-way ring, the worker starts the motor 10 to drive the gear 14 to rotate, moving the moving seat 7 laterally along the crossbeam 5. The hand chain hoist assembly 8 is moved to the top of the self-sealing structure. The hand chain hoist assembly 8 is connected to the self-sealing structure. The hydraulic cylinder 17 drives the fixed plate 16 to rise, and then the traveling wheels 15 move the device away from the high-pressure heater. When the device moves away, the hand chain hoist assembly 8 applies a pulling force to the self-sealing structure, moving the removed self-sealing structure laterally. The self-sealing structure is completely removed and suspended by the hand chain hoist assembly 8.

[0026] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-sealing dismounting auxiliary device for high-pressure heater of thermal power plant, comprising a chassis (1), characterized in that: A column (2) is fixedly installed on the top of the base frame (1). There are two columns (2) arranged symmetrically. A crossbeam (5) is fixedly installed on the top of the two columns (2). Limiting grooves (6) are provided on the side walls on both sides of the crossbeam (5). A movable seat (7) is movably installed on the lower part of the crossbeam (5). Limiting blocks (18) are fixed on both sides of the upper part of the movable seat (7). The limiting blocks (18) are set inside the limiting grooves (6). The limiting block (18) is slidably connected to the crossbeam (5). The lower end of the movable seat (7) is fixed with a connecting ring (9). A hand chain hoist assembly (8) is installed below the connecting ring (9), and the hand chain hoist assembly (8) is snapped together with the connecting ring (9). A working platform (3) is installed above the base frame (1), and the working platform (3) is set on one side of the column (2). Support frames (4) are fixed on both sides of the working platform (3), and the support frames (4) are fixedly connected to the base frame (1).

2. A self-sealing dismounting auxiliary device for high-pressure heater of thermal power plant according to claim 1, characterized in that: A toothed rack (12) is fixed at the lower end of the crossbeam (5). A rotating groove (13) is provided at the center of the movable seat (7). A gear (14) is rotatably installed inside the rotating groove (13). The gear (14) is located below the toothed rack (12) and meshes with the toothed rack (12). A motor (10) is fixed on one side of the movable seat (7), and the telescopic end of the motor (10) is connected to the gear (14).

3. A self-sealing dismounting auxiliary device for high-pressure heater of thermal power plant according to claim 2, characterized in that: Multiple rollers (11) are rotatably mounted on the inner side of the upper end of the movable seat (7), and the rollers (11) are arranged horizontally side by side. The rollers (11) are located inside the limiting groove (6), and the rollers (11) are in contact with the bottom of the limiting groove (6).

4. The self-sealing disassembly and assembly auxiliary device for a high-pressure heater in a thermal power plant according to claim 1, characterized in that: Each of the four corners of the base frame (1) is equipped with a walking wheel (15), and the walking wheel (15) is connected to the base frame (1) by screws.

5. A self-sealing dismounting aid for a high-pressure heater of a thermal power plant according to claim 4, characterized in that: A fixed plate (16) is installed on one side of the walking wheel (15), and a hydraulic cylinder (17) is installed above the fixed plate (16). The hydraulic cylinder (17) is connected to the base frame (1) by screws. The telescopic end of the hydraulic cylinder (17) is slidably connected to the base frame (1) through it, and the telescopic end of the hydraulic cylinder (17) is connected to the fixed plate (16).

6. A self-sealing dismounting aid for a high-pressure heater of a thermal power plant according to claim 1, characterized in that: A step assembly (19) is installed below one end of the work platform (3), and the step assembly (19) is connected to the work platform (3) by screws.

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