A generator manhole door dismounting and mounting auxiliary device

Abstract

A kind of generator manhole door dismounting auxiliary device. Because the height of operating personnel is different, uneven force can lead to the phenomenon that the height of generator manhole door cover plate is different, there are security and technical hidden dangers. The utility model discloses a base frame, two base elevators are fixed on the base frame, the base elevator flange plate of two base elevators is fixed on the bottom plate, a main elevator is fixed on the bottom plate, the manhole door seat is on the main elevator flange plate of the main elevator, and the fixed screw rod is connected with the threaded hole of the bottom plane of generator after passing through the mounting hole of the manhole door. The utility model is used for generator manhole door dismounting auxiliary.

Description

Technical Field

[0001] This utility model relates to an auxiliary device for disassembling and assembling a generator manhole door. Background Technology

[0002] During generator maintenance at the power plant, the generator manhole cover is located on the generator's underside. The manhole cover measures 610*540mm (length*width) and weighs approximately 100kg. Each disassembly and reassembly requires at least four people. Reassembly necessitates scaffolding, and workers manually lift the manhole cover to shoulder height and insert the bolts. During this process, variations in worker height and force can lead to inconsistent manhole cover heights, posing safety and technical hazards. Utility Model Content

[0003] The purpose of this utility model is to provide an auxiliary device for disassembling and assembling generator manhole doors, so as to solve the above-mentioned technical problems.

[0004] The above objectives are achieved through the following technical solutions: A generator manhole door disassembly and assembly auxiliary device comprises a base frame, on which two base lifters are fixed. The base lifter flanges of the two base lifters are fixed to a base plate. A main lifter is fixed to the base plate. The manhole door is seated on the main lifter flange of the main lifter. A fixing screw passes through the mounting hole on the manhole door and is threadedly connected to the threaded hole on the bottom plane of the generator.

[0005] The generator manhole door disassembly and assembly auxiliary device mentioned above, wherein both the main lift and the base lift are worm gear screw lifts.

[0006] The generator manhole door disassembly and assembly auxiliary device mentioned above has a base frame that is a square ring frame, and the top of the square ring frame has a through hole for the main lifting screw of the main elevator to pass through. Beneficial effects

[0007] 1. This utility model can support the manhole door to allow it to be raised and lowered, which facilitates the installation and disassembly of the manhole door, ensures that the manhole door cover plate is evenly stressed during installation and disassembly, and protects the generator manhole door sealing gasket from damage during assembly.

[0008] 2. When disassembling the manhole door, first remove the bolts installed at the four corners of the manhole door. Then, thread the fixing screw through the mounting holes after removing the bolts at the four corners of the manhole door and thread it into the threaded hole on the bottom plane of the generator. Then, place the device under the manhole door and adjust the height so that the flange plate of the main elevator contacts the bottom of the manhole door. Then, remove the remaining bolts installed on the manhole door, adjust the height of the main elevator to lower it, and then adjust the base elevator to lower the height of the manhole door until the fixing screw is disengaged from the manhole door. Then, the manhole door can be lifted down. Attached Figure Description

[0009] Figure 1 This is the front view of the present invention; Figure 2 This is a front view of the generator before the lead screw is installed to the bottom plane of the generator; Figure 3 A top view showing the fixing screw not being installed with respect to the bottom plane of the generator; The components are: 1. Generator bottom plane; 2. Fixing screw; 3. Main elevator flange plate; 4. Manhole door; 5. Main elevator; 6. Main elevator hand crank; 7. Base plate; 8. Main elevator screw; 9. Base elevator; 10. Through hole; 11. Base elevator hand crank; 12. Connecting rod; 13. Base frame; 14. Base elevator flange plate; 15. Nut. Detailed Implementation

[0010] Reference Figures 1-3 A generator manhole door assembly / disassembly auxiliary device comprises a base frame 13, on which two base lifters 9 are fixed. The base lifter flange plates 14 of the two base lifters are fixed to a base plate 7. A main lifter 5 is fixed to the base plate. Three through holes 10 are provided on the upper surface of the base frame. One through hole is located in the center for the main lifter screw of the main lifter to pass through. The other two through holes are for the base lifter screws of the base lifters to pass through. A center hole 16 is provided in the center of the base plate for the main lifter screw of the main lifter to pass through. The base lifter handwheels of the two base lifters are connected by a connecting rod 12, so that rotating one base lifter handwheel can realize the synchronous rotation of the two base lifter handwheels, realizing the synchronous operation of the two base lifters and ensuring the stable height adjustment of the base plate. The manhole door 4 is seated on the main lifter flange plate 3 of the main lifter. The fixing screw 2 passes through the mounting hole on the manhole door and is threadedly connected to the threaded hole on the bottom plane 1 of the generator.

[0011] Both the main lift and the base lift are worm gear screw jacks.

[0012] The base frame is a square ring frame, and the top of the square ring frame has a through hole 10 for the main lifting screw of the main elevator to pass through.

[0013] Working principle: First, when disassembling the manhole door, remove the bolts installed at the four corners of the manhole door. Then, thread the fixing screw through the mounting holes after removing the bolts at the four corners of the manhole door and connect it with the threaded hole on the bottom plane of the generator. Then, place the device under the manhole door and adjust the height so that the flange plate of the main lift of the main lift contacts the bottom of the manhole door. Then, remove the remaining bolts installed on the manhole door, and adjust the height of the main lift to lower it. Then, adjust the base lift to lower the height of the manhole door until the fixing screw is disengaged from the manhole door. Then, the manhole door can be lifted down. When installing the manhole door, first connect the four fixing screws to the threaded holes at the four corners of the generator's bottom plane. Then, place the device below the generator's bottom plane, lift the manhole door to this position, and place it on the main lifting platform flange plate. Adjust the base lifting platform to raise the manhole door's height. Stop when it is almost touching the bottom of the fixing screws. Then, manually adjust the position of the manhole door so that the four fixing screws can pass through the corresponding mounting holes at the four corners of the manhole door. After adjustment, continue operating the main lifting platform to raise the manhole door's height until it touches the generator's bottom plane. Then, install bolts into all mounting holes on the generator's bottom plane except for the mounting holes connecting the fixing screws. After installation, adjust the main lifting platform to lower the device's height. Then, unscrew the fixing screws and install the bolts at the four corners to complete the manhole door installation. Using a lifting platform to raise the manhole door's height can prevent uneven heights of the generator's manhole door cover caused by uneven heights or uneven force applied by operators.

Claims

1. An auxiliary device for disassembling and assembling a generator manhole door, characterized in that: Its components include a base frame, on which two base lifts are fixed. The base lift flanges of the two base lifts are fixed to a base plate. A main lift is fixed to the base plate. A manhole door is seated on the main lift flange of the main lift. A fixing screw passes through the mounting hole on the manhole door and is threadedly connected to the threaded hole on the bottom plane of the generator.

2. The generator manhole door disassembly and assembly auxiliary device according to claim 1, characterized in that: Both the main lift and the base lift are worm gear screw jacks.

3. The generator manhole door disassembly and assembly auxiliary device according to claim 2, characterized in that: The base frame is a square ring frame, and the top of the square ring frame has a through hole for the main lifting screw of the main elevator to pass through.

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