Hydropower station pressure steel pipe back pipe crack detection and repair tool and use method thereof

Abstract

Hydropower station pressure steel pipe back pipe crack detection repair tool and its using method, including support base, support base is equipped with one end with articulated multi-section telescopic arm, the other end of multi-section telescopic arm is connected with adjustable platform structure;The adjustable platform structure includes a plurality of mutually matched platform units, the platform unit at the end is equipped with a connecting plate, the connecting plate is equipped with a connecting seat, and the connecting seat is hinged with the connecting head arranged on the multi-section telescopic arm. With the above structure, repeated scaffold structure is avoided, the detection and repair work time is greatly reduced, the cost is reduced, the operation safety is improved, the back pipe of different diameter size and inclination is adapted, the flexible adjustment is realized, the staff can walk safely on the platform, the load strength is large, only the push-up height needs to be adjusted, the back pipe outer surface each area can be covered comprehensively, the base position needs not to be adjusted frequently, and the work efficiency is improved significantly.

Description

Technical Field

[0001] This invention relates to the field of hydropower station maintenance equipment technology, and in particular to the tooling for detecting and repairing cracks in the back pipe of pressure steel pipes in hydropower stations and its usage method. Background Technology

[0002] The concrete back pipe structure of the pressure steel pipe in large hydropower stations is approximately semi-cylindrical, with a large surface diameter, a large inclined pipe angle, and a vertical height range of nearly 30m. Currently, there is no suitable tooling for inspection and maintenance. Generally, scaffolding is erected along the slope, with planks installed step by step, and personnel climb the planks to perform inspection and maintenance work. This method is time-consuming, costly, and cannot guarantee operational safety.

[0003] Existing related technologies include aerial ladder trucks or aerial work platforms, whose main function is to transport personnel, equipment, materials, etc. to high altitudes. The general working height can reach tens of meters. The extension and retraction of the aerial ladder is powered by the transport vehicle, and the fixed base of the aerial ladder can complete a certain angle of rotation on the transport vehicle.

[0004] The primary function of aerial ladder trucks is to transport goods and materials to high altitudes to save labor costs and improve efficiency. Currently, relevant national policies prohibit aerial ladder trucks from carrying personnel for high-altitude operations. This is mainly because aerial ladder trucks have a cantilever structure, which currently lacks sufficient stability and safety protection. The maximum load capacity is limited to 400 kg, and the carrying space is cramped, making it impossible for personnel to move. When using aerial ladder trucks, the surrounding environment must be carefully considered. The vehicle should be parked on flat, solid ground. Operation is prohibited when the wind force in the work area reaches level 4 or higher, as this poses a certain degree of danger. Importantly, aerial ladder trucks are generally suitable for point operations. When the work area is large and the surface shape is complex, the top of the aerial ladder truck is limited by the base's rotation angle and the straight path of the telescopic joints. After one positioning, the top of the load cannot reach all work points, requiring multiple repositioning of the vehicle to meet the work point requirements, thus limiting work efficiency. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a tooling for detecting and repairing cracks in the back pipe of a hydropower station's pressure steel pipe and its usage method. This avoids the need for repeated scaffolding construction, greatly reduces the time and cost of detection and repair work, facilitates reuse, and significantly improves operational safety. It is adaptable to back pipes of different diameters and inclinations, allowing for flexible adjustment. Workers can walk safely on the platform, making it extremely easy to detect and repair cracks in any area of ​​the back pipe. It has a high load-bearing capacity; simply adjusting the lifting height is sufficient to fully cover all areas of the back pipe's outer surface, eliminating the need for frequent adjustments to the base position and significantly improving work efficiency.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a tooling for detecting and repairing cracks in the back pipe of a hydropower station pressure steel pipe, including a support base, wherein a multi-section telescopic arm is provided on the support base, one end of which is hinged to the support base, and the other end of the multi-section telescopic arm is connected to an adjustable platform structure. The adjustable platform structure includes multiple platform units that are assembled together. The platform unit located at the end is provided with a connecting plate, and the connecting plate is provided with a connecting seat. The connecting seat is hinged to the connecting head provided on the multi-section telescopic arm. The platform unit includes a platform plate, on which a first mounting rod and a second mounting rod are provided. Support rods are symmetrically arranged on the first mounting rod. One end of the support rod is connected to a first rotating sleeve provided on the first mounting rod, and the other end of the support rod is provided with a connecting rod. Multiple second pulleys are provided on the support rod. Adjusting rods are symmetrically arranged on the connecting rod. One end of the adjusting rod is hinged to the connecting rod, and the other end of the adjusting rod is connected to the second mounting rod through an adjusting and fixing structure. The two ends of the second mounting rod are respectively provided with mounting rings and mounting ring seats that cooperate with the mounting rings. The mounting rings and mounting ring seats are connected by mounting components.

[0007] In a preferred embodiment, the adjusting and fixing structure includes an adjusting groove provided on the second mounting rod, a second rotating sleeve provided on the adjusting groove and connected to a fixing clamp sleeved on the adjusting rod via a connecting block, and a locking element provided on the fixing clamp.

[0008] In a preferred embodiment, the platform is equipped with safety railings.

[0009] In a preferred embodiment, the first mounting rod is provided with first limiting heads at both ends.

[0010] In a preferred embodiment, the adjusting rod is provided with a second limiting head.

[0011] In a preferred embodiment, the platform plate is an isosceles trapezoidal plate, and the side length of the first mounting rod side of the platform plate is less than the side length of the second mounting rod side.

[0012] In a preferred embodiment, the multi-section telescopic arm is provided with multiple first pulleys.

[0013] In the preferred embodiment, the multi-section telescopic arm is inverted, with the innermost telescopic section of the multi-section telescopic arm connected to the support base, and the outermost telescopic section of the multi-section telescopic arm connected to the adjustable platform structure.

[0014] The tooling for detecting and repairing cracks in the back pipe of a hydropower station's pressure steel pipe, and its method of use, provided by this invention, have the following beneficial effects by adopting the above-described structure: (1) Avoiding the repeated construction of scaffolding structures greatly reduces the time spent on inspection and repair work, reduces costs, facilitates reuse, and significantly improves operational safety; (2) It can be adapted to back tubes of different diameters and inclinations, and can be flexibly adjusted. Workers can walk safely on the platform, and it is very easy to detect and repair cracks in any area of ​​the back tube. (3) With high load capacity, it can fully cover all areas of the outer surface of the back tube by simply adjusting the lifting height, without the need to frequently adjust the base position, thus significantly improving work efficiency. Attached Figure Description

[0015] 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 overall structure of the present invention.

[0016] Figure 2 This is a side view of the overall structure of the present invention.

[0017] Figure 3 This is a schematic diagram of the adjustable platform structure of the present invention.

[0018] Figure 4 This is a schematic diagram of the platform unit structure of the present invention.

[0019] Figure 5 This is a schematic diagram of the platform unit structure of the present invention.

[0020] In the diagram: 1. Support base; 2. Multi-section telescopic arm; 3. Adjustable platform structure; 4. First pulley; 5. Connector; 6. Platform unit; 7. Connecting plate; 8. Connecting seat; 9. Platform plate; 10. First mounting rod; 11. Second mounting rod; 12. First limiting head; 13. Support rod; 14. First rotating sleeve; 15. Connecting rod; 16. Second pulley; 17. Adjusting rod; 18. Second limiting head; 19. Safety railing; 20. Adjusting groove; 21. Second rotating sleeve; 22. Connecting block; 23. Fixing clamp; 24. Locking component; 25. Mounting ring; 26. Mounting ring seat; 27. Mounting component. Detailed Implementation

[0021] Example 1: like Figure 1-5 In the middle, the tooling for detecting and repairing cracks in the back pipe of the pressure steel pipe of the hydropower station includes a support base 1, on which a multi-section telescopic arm 2 is provided at one end and is hinged to it, and the other end of the multi-section telescopic arm 2 is connected to an adjustable platform structure 3. The adjustable platform structure 3 includes multiple platform units 6 that are assembled together. A connecting plate 7 is provided on the platform unit 6 located at the end. A connecting seat 8 is provided on the connecting plate 7. The connecting seat 8 is hinged to the connecting head 5 provided on the multi-section telescopic arm 2. The platform unit 6 includes a platform plate 9, on which a first mounting rod 10 and a second mounting rod 11 are provided. Support rods 13 are symmetrically provided on the first mounting rod 10. One end of the support rod 13 is connected to a first rotating sleeve 14 provided on the first mounting rod 10. The other end of the support rod 13 is provided with a connecting rod 15. Multiple second pulleys 16 are provided on the support rod 13. Adjusting rods 17 are symmetrically provided on the connecting rod 15. One end of the adjusting rod 17 is hinged to the connecting rod 15. The other end of the adjusting rod 17 is connected to the second mounting rod 11 through an adjusting and fixing structure. The two ends of the second mounting rod 11 are respectively provided with mounting rings 25 and mounting ring seats 26 that cooperate with the mounting rings 25. The mounting rings 25 and mounting ring seats 26 are connected by mounting parts 27.

[0022] In a preferred embodiment, the adjusting and fixing structure includes an adjusting groove 20 disposed on the second mounting rod 11, a second rotating sleeve 21 that cooperates with the adjusting groove 20, and the second rotating sleeve 21 connected to a fixing clamp 23 sleeved on the adjusting rod 17 via a connecting block 22. The fixing clamp 23 is provided with a locking element 24. This allows for adjustment of the fitting angle to accommodate back tubes of different inclinations, ensuring the platform plate 9 remains horizontal at all times, facilitating safe use by personnel.

[0023] In a preferred embodiment, the platform 9 is equipped with a safety railing 19 to enhance safety.

[0024] In a preferred embodiment, the first mounting rod 10 is provided with first limiting heads 12 at both ends. These limit heads define the position, ensuring a robust structure and enhancing safety and practicality.

[0025] In a preferred embodiment, the adjusting rod 17 is provided with a second limiting head 18. This limits the position, ensuring a robust structure and making it safer and more practical.

[0026] In the preferred embodiment, the platform plate 9 is an isosceles trapezoidal plate, and the side length on the first mounting rod 10 side of the platform plate 9 is shorter than the side length on the second mounting rod 11 side. This facilitates the use of multiple platform units 6 in combination, adapts to the oblique elliptical line of the back tube cylinder, and provides a more reliable and stable fit.

[0027] In a preferred embodiment, the multi-section telescopic arm 2 is equipped with multiple first pulleys 4. This sliding support design ensures smoother and more stable lifting and lowering, making it safer and more convenient.

[0028] In the preferred embodiment, the multi-section telescopic arm 2 is inverted, with the innermost telescopic section of the multi-section telescopic arm 2 connected to the support base 1, and the outermost telescopic section of the multi-section telescopic arm 2 connected to the adjustable platform structure 3. This inverted configuration allows the adjustable platform structure 3 to be directly connected to the outermost telescopic section, ensuring stable and safe lifting and lowering, a long overall travel distance, and a low storage position, facilitating easy access for workers.

[0029] Example 2: like Figure 1-5 In this invention, the method of use is as follows: 1. Pre-measure the inclination angle and surface diameter of the pressure steel pipe back tube; 2. Adjust according to the measured tilt angle. By changing the position of the fixed clamp 23 on the adjusting rod 17, the angle of the support rod 13 is changed so that the platform plate 9 always remains horizontal when the second pulley 16 on the support rod 13 is in contact with the pressure steel pipe back tube and moves. 3. Select an appropriate number of platform units 6 according to the measured surface diameter. Adjacent platform units 6 are connected by mounting ring 25, mounting ring seat 26 and mounting piece 27. Then, they are connected to the multi-section telescopic arm 2 through the two platform units 6 at the ends. IV. During the specific operation of inspection and repair, the support base 1 is set on both sides of the back tube, and then the multi-section telescopic arm 2 is placed against the inclined wall. With the support of the first pulley 4, it is smoothly pushed up on the inclined wall. The operator stands on the adjustable platform structure 3 and relies on the second pulley 16 on the adjustable platform structure 3 to slide and support the back tube surface. As the multi-section telescopic arm 2 is pushed up, it moves upward until it reaches the inspection and repair area. The staff can move back and forth on the adjustable platform structure 3 to inspect and repair each area of ​​the back tube evenly and meticulously.

[0030] The beneficial effects of this invention are: it avoids the need to repeatedly build scaffolding structures, greatly reduces the time spent on inspection and repair work, lowers costs, facilitates reuse, and significantly improves operational safety; it is adaptable to back tubes of different diameters and inclinations, allowing for flexible adjustment, and workers can walk safely on the platform, making it extremely easy to inspect and repair cracks in any area of ​​the back tube; it has a high load-bearing capacity, and only requires adjusting the lifting height to fully cover all areas of the outer surface of the back tube, eliminating the need for frequent adjustments to the base position, thus significantly improving work efficiency.

[0031] Example 3: like Figure 1-2 In the middle, the multi-section telescopic boom 2 consists of a fixed telescopic section (1 section), a movable telescopic section (7 sections), a hydraulic cylinder, a guide support wheel, a mechanical locking device, and displacement and pressure sensing devices, etc. The movable telescopic section is extended and shortened by the extension and retraction of the hydraulic cylinder.

Claims

1. A tooling for detecting and repairing cracks in the back pipe of a hydropower station pressure steel pipe, including a support base (1), characterized in that: The support base (1) is provided with a multi-section telescopic arm (2) with one end hinged to it, and the other end of the multi-section telescopic arm (2) is connected to the adjustable platform structure (3); The adjustable platform structure (3) includes multiple platform units (6) that are assembled together. A connecting plate (7) is provided on the platform unit (6) at the end. A connecting seat (8) is provided on the connecting plate (7). The connecting seat (8) is hinged to the connecting head (5) provided on the multi-section telescopic arm (2). The platform unit (6) includes a platform plate (9), on which a first mounting rod (10) and a second mounting rod (11) are provided. Support rods (13) are symmetrically provided on the first mounting rod (10). One end of the support rod (13) is connected to a first rotating sleeve (14) provided on the first mounting rod (10). The other end of the support rod (13) is provided with a connecting rod (15). Multiple second pulleys (16) are provided on the support rod (13). Adjusting rods (17) are symmetrically provided on the connecting rod (15). One end of the adjusting rod (17) is hinged to the connecting rod (15). The other end of the adjusting rod (17) is connected to the second mounting rod (11) through an adjusting and fixing structure. The two ends of the second mounting rod (11) are respectively provided with a mounting ring (25) and a mounting ring seat (26) that cooperates with the mounting ring (25). The mounting ring (25) and the mounting ring seat (26) are connected by a mounting component (27).

2. The tooling for detecting and repairing cracks in the back pipe of a hydropower station pressure steel pipe according to claim 1, characterized in that: The adjustment and fixing structure includes an adjustment groove (20) provided on the second mounting rod (11), a second rotating sleeve (21) provided on the adjustment groove (20) and connected to a fixing clamp (23) sleeved on the adjustment rod (17) via a connecting block (22), and a locking element (24) provided on the fixing clamp (23).

3. The tooling for detecting and repairing cracks in the back pipe of a hydropower station pressure steel pipe according to claim 1, characterized in that: The platform board (9) is equipped with a safety railing (19).

4. The tooling for detecting and repairing cracks in the back pipe of a hydropower station pressure steel pipe according to claim 1, characterized in that: The first mounting rod (10) is provided with first limiting heads (12) at both ends.

5. The tooling for detecting and repairing cracks in the back pipe of a hydropower station pressure steel pipe according to claim 1, characterized in that: The adjusting rod (17) is provided with a second limiting head (18).

6. The tooling for detecting and repairing cracks in the back pipe of a hydropower station pressure steel pipe according to claim 1, characterized in that: The platform plate (9) is an isosceles trapezoidal plate, and the side length of the first mounting rod (10) side of the platform plate (9) is less than the side length of the second mounting rod (11) side.

7. The tooling for detecting and repairing cracks in the back pipe of a hydropower station pressure steel pipe according to claim 1, characterized in that: The multi-section telescopic arm (2) is provided with multiple first pulleys (4).

8. The tooling for detecting and repairing cracks in the back pipe of a hydropower station pressure steel pipe according to claim 1, characterized in that: The multi-section telescopic arm (2) is inverted, with the innermost telescopic section of the multi-section telescopic arm (2) connected to the support base (1), and the outermost telescopic section of the multi-section telescopic arm (2) connected to the adjustable platform structure (3).

9. The method of using the tooling for detecting and repairing cracks in the back pipe of a hydropower station pressure steel pipe according to any one of claims 1-8, characterized in that... Includes the following steps: 1) Pre-measure the inclination angle and surface diameter of the pressure steel pipe back tube; (ii) Adjust according to the measured tilt angle. By changing the position of the fixed clamp (23) on the adjusting rod (17), the angle of the support rod (13) is changed so that the second pulley (16) on the support rod (13) is in contact with the pressure steel pipe back tube and the platform plate (9) always remains horizontal. (iii) Select an appropriate number of platform units (6) according to the measured surface diameter. Adjacent platform units (6) are connected by mounting rings (25), mounting ring seats (26) and mounting parts (27). They are then connected to the multi-section telescopic arm (2) through the two platform units (6) at the ends. (iv) During the specific operation of inspection and repair, the support base (1) is set on both sides of the back tube, and then the multi-section telescopic arm (2) is placed against the inclined wall. With the support of the first pulley (4), it is smoothly pushed up on the inclined wall. The operator stands on the adjustable platform structure (3) and relies on the second pulley (16) on the adjustable platform structure (3) to slide and support the back tube surface. It moves upward with the multi-section telescopic arm (2) until it reaches the inspection and repair area. The staff can go back and forth on the adjustable platform structure (3) to inspect and repair each area of ​​the back tube evenly and meticulously.

Images