Maintenance platform device and maintenance method for pumped storage power station transformer

Abstract

The maintenance platform device for the pumped storage power station transformer comprises a vehicle body, a bottom plate is fixed to the top of the vehicle body, a shear fork lifting mechanism is installed on the bottom plate, and the shear fork lifting mechanism drives a top plate to ascend and descend; a mounting frame is mounted on the top plate, a lifting assembly is mounted on the mounting frame, and the lifting assembly lifts a transformer; supporting assemblies are hinged to the left side and the right side of the vehicle body correspondingly, and when the shear fork lifting mechanism is unfolded, the supporting assemblies are turned over and supported on the ground. When the shear fork lifting mechanism is folded, the supporting assembly turns over and is separated from the ground. According to the maintenance platform device for the pumped storage power station transformer and the maintenance method, the maintenance efficiency can be improved, and safety is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of transformer maintenance technology, and in particular to a maintenance platform device and maintenance method for transformers in pumped storage power stations. Background Technology

[0002] As core equipment in the power system, pumped-storage power station transformers require frequent high-altitude operations such as disassembling the top cover and inspecting internal components during maintenance.

[0003] Existing fixed lifting platforms require the pre-construction of scaffolding or tracks, which is time-consuming and cannot adapt to the narrow spaces inside power plants; in addition, traditional solutions require additional cranes, resulting in poor equipment coordination and long operation times; at the same time, maintenance personnel need to frequently go up and down the platform to adjust the hoisting position, which is inefficient and increases the risk of falls from heights. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a maintenance platform device and maintenance method for transformers in pumped storage power stations, which can improve maintenance efficiency and safety.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A maintenance platform device for a pumped storage power station transformer includes a vehicle body, a base plate fixed to the top of the vehicle body, a scissor lift mechanism installed on the base plate, the scissor lift mechanism driving the top plate to rise and fall; a mounting frame installed on the top plate, a lifting component installed on the mounting frame, the lifting component lifting and falling the transformer; support components are hinged to both sides of the vehicle body, when the scissor lift mechanism is extended, the support components flip and support the ground; when the scissor lift mechanism is retracted, the support components flip and detach from the ground.

[0006] The lifting assembly includes a dual-axis motor, with its two output ends connected to the take-up rollers. Each take-up roller is wound with a steel cable, which passes over guide wheels and pulleys on the mounting frame and extends out of the mounting frame. A hook is fixed to the end of the steel cable.

[0007] The top of the top plate is fixedly equipped with fences on the left, right and rear sides, and a fence gate is rotatably installed on the front side of the top of the top plate.

[0008] One end of the scissor lift mechanism is hinged to the top of the base plate and the hinge point is fixed; the other end of the scissor lift mechanism is hinged to the top of the base plate and the junction point slides. One end of the scissor lift mechanism is hinged to the bottom of the top plate and the hinge point is fixed; the other end of the scissor lift mechanism is hinged to the bottom of the top plate and the hinge point slides.

[0009] The sliding end at the bottom of the scissor lift mechanism is fixedly connected to one side of the mounting base, and the mounting base moves along the axis of the slide rod.

[0010] The support assembly includes a side plate, one end of which is hinged to the vehicle body. A slide rail is fixed to the inner end face of the side plate. One end of the drive rod is slidably engaged with the slide rail, and the other end of the drive rod is slidably arranged in a guide groove, which is set on the mounting base.

[0011] The guide groove includes a vertical groove and a horizontal groove, and the vertical groove and the horizontal groove are smoothly transitioned by an arc-shaped groove.

[0012] Multiple hydraulic cylinders are fixed inside the side plate, and the output end of each hydraulic cylinder passes through the side plate and is fixedly installed with a support plate.

[0013] Support rods are fixedly installed at the four ends of the top of the base plate. When the scissor lift mechanism is in the initial folded state, the support rods support the bottom of the top plate.

[0014] A method for maintaining a transformer in a pumped storage power station using a maintenance platform device includes the following steps: S1: First, move this device to the power station transformer that needs maintenance, and the maintenance worker stands on top of the top plate 4; S2: Adjust the lifting height of the scissor lift mechanism 3 according to actual needs. The scissor lift mechanism 3 drives the top plate 4 and the mounting frame 5 to rise to a suitable height. S3: After the top plate 4 rises to the transformer installation position, operate the lifting component on the mounting frame 5 to lift the transformer end cover via the steel cable 13, so that the transformer can be opened; the maintenance worker opens the fence gate 21 and, with complete safety measures in place, climbs onto the transformer mounting bracket to carry out maintenance work on the transformer.

[0015] This invention provides a maintenance platform device and maintenance method for transformers in pumped storage power stations, which has the following technical advantages: 1) By linking the scissor lift mechanism with the support components, the side plates automatically unfold to a horizontal state while the scissor lift mechanism raises the top plate. In conjunction with the hydraulic cylinder, the support plate is pushed to contact the ground, thereby supporting the vehicle body and ensuring that the vehicle body will not tilt during the process of suspending the transformer, and can always remain stable.

[0016] 2) The dual-axis motor drives two take-up rollers to simultaneously take up and release the steel cable, which can achieve a faster lifting speed and shorten the disassembly time of the transformer end cover; and the composite guiding structure of pulley and guide wheel can reduce the deflection angle of the steel cable and avoid the risk of entanglement. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2This is a schematic diagram of the structure without side plates in this invention.

[0019] Figure 3 This is a partial structural diagram of the present invention.

[0020] Figure 4 This is a schematic diagram of the support mechanism in this invention.

[0021] In the diagram: 1. Vehicle body; 2. Base plate; 3. Scissor lift mechanism; 4. Top plate; 5. Mounting frame; 6. Fence; 7. Side plate; 8. Support plate; 9. Rewind roller; 10. Dual-axis motor; 11. Guide wheel; 12. Pulley; 13. Steel cable; 14. Mounting seat; 15. Drive rod; 16. Guide chute; 17. Hydraulic cylinder; 18. Slide rail; 19. Slide rod; 20. Support rod; 21. Fence gate. Detailed Implementation

[0022] like Figure 1-2 As shown, a maintenance platform device for a pumped storage power station transformer includes a vehicle body 1. A base plate 2 is fixedly installed on the top of the vehicle body 1. A scissor lift mechanism 3 is installed on the top of the base plate 2, and the scissor lift mechanism 3 drives the top plate 4 to rise and fall. A mounting frame 5 is fixedly installed on the front top of the top of the top plate 4, and a lifting component is installed on the top of the mounting frame 5. Support components are movably installed on both the left and right sides of the vehicle body 1. The support components are used to make frictional contact with the ground to ensure the stability of the device, and the support components are linked to the scissor lift mechanism 3.

[0023] During operation, the vehicle body 1 moves the device, allowing it to be flexibly moved to the side of the power station transformer that needs maintenance. The scissor lift mechanism 3 is existing technology, similar to "CN201620741294-Small cross-section four-stage hydraulic scissor lift mechanism". The specific one can be selected according to actual needs. The scissor lift mechanism 3 drives the top plate 4 and the mounting frame 5 to rise. Maintenance workers can stand on the top of the top plate 4 and rise together with the top plate 4. After rising to a suitable height, they can operate the lifting components on the mounting frame 5 to lift the transformer, thereby opening the top of the transformer so that workers can maintain the transformer.

[0024] like Figure 1As shown, the lifting assembly includes two take-up rollers 9, two guide wheels 11, two pulleys 12, a dual-axis motor 10, and two steel cables 13. The two pulleys 12 are rotatably mounted on the front side of the top inner side of the mounting frame 5, the two guide wheels 11 are rotatably mounted on the front side of the top of the mounting frame 5, and the two take-up rollers 9 are rotatably mounted on the rear side of the top of the mounting frame 5. The dual-axis motor 10 is fixedly mounted on the top of the mounting frame 5 and is connected to the two take-up rollers 9 for transmission. Steel cables 13 are wound around both take-up rollers 9, with one end of each cable wrapping around the guide wheels 11 and pulleys 12 and extending to the bottom of the mounting frame 5. A hook is fixedly mounted on one end of each cable 13, which can hook onto the end cover at the top of the transformer. The dual-axis motor 10 drives the two take-up rollers 9 to rotate, lifting the transformer end cover via the steel cables 13, thus opening the transformer. Maintenance workers can then perform maintenance work on the transformer.

[0025] The top of the top plate 4 is fixedly installed with railings 6 on the left, right and rear sides. The front side of the top of the top plate 4 is rotatably installed with a railing gate 21, which is located inside the mounting frame 5.

[0026] The fence 6 can protect maintenance workers on top of the top plate 4 from falling. After the fence gate 21 is opened, maintenance workers can enter and exit the top plate 4. When the top plate 4 rises to the transformer installation position, maintenance workers can open the fence gate 21 and climb onto the transformer installation bracket to carry out maintenance work on the transformer, provided that all safety measures are in place.

[0027] One end of the bottom of the scissor lift mechanism 3 is hinged to the ear plate, which is fixed to the base plate 2. The other end of the bottom of the scissor lift mechanism 3 is hinged to the mounting base 14, which is slidably engaged with the slide rod 19. The mounting base 14 can move along the axis of the slide rod 19.

[0028] One end of the top of the scissor lift mechanism 3 is hinged to the ear plate, which is fixed to the bottom of the top plate 4. The other end of the bottom of the scissor lift mechanism 3 is hinged to the slider, which slides in contact with the slide rail at the bottom of the top plate 4.

[0029] like Figures 3-4 As shown, the support assembly on each side includes a side plate 7, two support plates 8, a drive rod 15, two hydraulic cylinders 17, and a slide rail 18.

[0030] The lower end of the side plate 7 is rotatably mounted on the outside of the vehicle body 1. Two hydraulic cylinders 17 are fixedly mounted on the left and right sides of the side plate 7 near the bottom plate 2. The output ends of the two hydraulic cylinders 17 pass through the side plate 7 and are fixedly mounted with support plates 8. The bottom of the support plates 8 is embedded with anti-slip textures. The slide rail 18 is vertically fixedly mounted on the side plate 7 near the bottom plate 2. One end of the drive rod 15 is slidably connected to the slide rail 18, and the other end of the drive rod 15 is slidably arranged in the guide groove 16. The guide groove 16 is provided on the mounting base 14. The guide groove 16 includes a vertical groove and a horizontal groove, and the vertical groove and the horizontal groove are smoothly transitioned by an arc-shaped groove.

[0031] When the scissor lift mechanism 3 is in operation, its bottom sliding end moves. The sliding end of the scissor lift mechanism 3 can drive the mounting base 14 to move along the slide rod 19. After the mounting base 14 moves, it can drive one end of the drive rod 15 to rotate through the guide slide groove 16, so that one end of the drive rod 15 rotates from a horizontal state to a vertical state. The other end of the drive rod 15 will push the side plate 7 to rotate, so that the side plate 7 changes from a vertical state to a stable horizontal state. At this time, the support plate 8 will be parallel to the ground. Then, the hydraulic cylinder 17 is activated, and the hydraulic cylinder 17 pushes the support plate 8 to contact the ground, thereby supporting the vehicle body 1 and ensuring that the vehicle body 1 will not tilt during the process of suspending the transformer, and can always remain stable.

[0032] like Figure 3 As shown, support rods 20 are fixedly installed at all four ends of the top of the base plate 2. When the scissor lift mechanism 3 is in the initial folded state, the support rods 20 can support the bottom of the top plate 4, so that the top plate 4 will not shake when maintenance workers enter the top of the top plate 4.

[0033] Working principle and process: S1: First, move this device to the power station transformer that needs maintenance, and the maintenance worker stands on top of the top plate 4.

[0034] S2: Adjust the lifting height of the scissor lift mechanism 3 according to actual needs. The scissor lift mechanism 3 drives the top plate 4 and the mounting frame 5 to rise to a suitable height.

[0035] S3: After the top plate 4 rises to the transformer installation position, operate the lifting component on the mounting frame 5 to lift the transformer end cover via the steel cable 13, so that the transformer can be opened; the maintenance worker opens the fence gate 21 and, with complete safety measures in place, climbs onto the transformer mounting bracket to carry out maintenance work on the transformer.

Claims

1. A maintenance platform device for pumped storage power plant transformers, characterized by: The utility model relates to a transformer lifting device, including car body (1), car body (1) top fixed with bottom plate (2), bottom plate (2) install the scissor lift mechanism (3) on, scissor lift mechanism (3) drive the top plate (4) lift-down, top plate (4) install the mounting bracket (5) on, mounting bracket (5) install the lifting assembly, lifting assembly to transformer lift-down, car body (1) both sides are hinged with support assembly, when scissor lift mechanism (3) unfolds, support assembly overturns and supports on the ground, when scissor lift mechanism (3) is gathered, support assembly overturns and with the ground is separated from contact.

2. A maintenance platform device for pumped storage power plant transformers according to claim 1, characterized in that: The lifting assembly includes a double-shaft motor (10), the two output ends of the double-shaft motor (10) are connected with winding rollers (9), each winding roller (9) is wound with a steel cable (13), the steel cable (13) passes through a guide wheel (11) and a pulley (12) on the mounting bracket (5) and extends out of the mounting bracket (5), and the end of the steel cable (13) is fixed with a hook.

3. A maintenance platform device for pumped storage power plant transformers according to claim 1, characterized in that: The left side, the right side and the back side of the top of the top plate (4) are fixedly installed with fences (6), and the front side of the top of the top plate (4) is rotatably installed with a fence door (21).

4. A maintenance platform device for pumped storage power plant transformers according to claim 1, characterized in that: One end of the bottom of the scissor lift mechanism (3) is hingedly connected to the top of the bottom plate (2), and the hinge joint is fixed; the other end of the bottom of the scissor lift mechanism (3) is hingedly connected to the top of the bottom plate (2), and the hinge joint is slidingly movable; one end of the top of the scissor lift mechanism (3) is hingedly connected to the bottom of the top plate (4), and the hinge joint is fixed; the other end of the top of the scissor lift mechanism (3) is hingedly connected to the bottom of the top plate (4), and the hinge joint is slidingly movable.

5. A maintenance platform arrangement for pumped storage power station transformers according to claim 4, characterized in that: The sliding end of the bottom of the scissor lift mechanism (3) is fixedly connected to one side of the mounting seat (14), and the mounting seat (14) moves along the axis direction of the sliding rod (19).

6. A maintenance platform arrangement for pumped storage power station transformers according to claim 5, characterized in that: The support assembly includes a side plate (7), one end of the side plate (7) is hingedly connected to the car body (1), the inner end surface of the side plate (7) is fixedly provided with a sliding rail (18), one end of a driving rod (15) is slidingly connected to the sliding rail (18), the other end of the driving rod (15) is slidingly arranged in a guide sliding groove (16), and the guide sliding groove (16) is arranged on the mounting seat (14).

7. A maintenance platform arrangement for pumped storage power station transformers according to claim 6, characterized in that: The guide sliding groove (16) includes a vertical sliding groove, a horizontal sliding groove and an arc-shaped sliding groove which smoothly connects the vertical sliding groove and the horizontal sliding groove.

8. A maintenance platform device for pumped storage power plant transformers according to claim 6, characterized in that: A plurality of hydraulic cylinders (17) are fixedly arranged on the inner side of the side plate (7), and the output end of each hydraulic cylinder (17) penetrates through the side plate (7) and is fixedly provided with a support plate (8).

9. A maintenance platform arrangement for pumped storage power station transformers according to claim 8, characterized in that: Four ends of the top of the bottom plate (2) are fixedly provided with support rods (20), and when the scissor lift mechanism (3) is in an initial folding state, the support rods (20) support the bottom of the top plate (4).

10. A method of servicing a pumped storage power plant transformer using the servicing platform arrangement according to any one of claims 1-9, characterized in that, The utility model relates to a transformer lifting device, including the following steps: S1: first, the device is moved to the transformer of the power station that needs to be maintained, and the maintenance worker stands on the top of the top plate 4; S2: according to actual demand, the lifting height of the scissor lift mechanism 3 is adjusted, the scissor lift mechanism 3 drives the top plate 4 and the mounting bracket 5 to rise to a suitable height; S3: When the top plate 4 is raised to the transformer installation position, the lifting assembly on the mounting frame 5 is operated to lift the transformer end cover through the steel cable 13, so that the transformer is opened; the maintenance worker opens the fence door 21, and climbs onto the installation support of the transformer under the condition that the safety measures are completely implemented, to perform maintenance work on the transformer.

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