Crawling ladder for overhauling machine head cover of hydropower station

Abstract

A hydropower station headstock overhauling ladder stand comprises a supporting structure, the supporting structure comprises a set of parallel main supporting rods and a plurality of transverse connecting rods, and supporting assemblies are arranged at the lower ends of the main supporting rods; a climbing assembly is arranged on the supporting structure and comprises a series of uniformly distributed climbing pedals and handrails; an adjusting assembly is mounted on the handrail; a fixing device is arranged between the supporting structure and the hydropower station head cover and comprises one or more pairs of adjustable buckle assemblies, clamping force is adjusted by rotating buckle heads, tight fixing of the head covers of different sizes and shapes is achieved, and a safety locking mechanism is arranged to prevent loosening. The problems that a traditional ladder stand device is insufficient in bearing capacity, poor in stability, complex in operation and inconvenient to install in the maintenance process of an existing hydropower station headstock cover are solved. By means of the stable supporting structure, the convenient climbing assembly, the adjustable fixing device and the adjustable adjusting assembly, efficient, safe and convenient installation and use of the maintenance ladder stand device are achieved, and the practical application value is high.

Description

Technical Field

[0001] The utility model relates to the technical field of maintenance ladders, in particular to a maintenance ladder for a head cover of a hydropower station. Background Art

[0002] During the operation of a hydropower station, it is necessary to regularly inspect and maintain the equipment inside the hydropower station's head cover. A maintenance ladder is needed during the maintenance process. The stability of the top and bottom ends of the maintenance ladder in the prior art is low, and there are certain safety hazards. Based on this, the utility model designs a hydropower station's head cover maintenance ladder to solve the above problem.

[0003] During the construction and operation of a hydropower station, the hood is a key component that protects the generator set from the external environment, and its inspection and maintenance are extremely important. At present, there are many ladder devices on the market for the inspection and maintenance of hydropower station equipment, which have improved the efficiency and safety of the inspection and maintenance work to a certain extent. However, there are still some urgent problems to be solved for the inspection and maintenance ladder device for the specific application scenario of the hood of a hydropower station.

[0004] Specifically, most of the existing ladder devices for maintenance of hydropower stations adopt a universal design, which fails to fully consider the special structure of the head cover of the hydropower station and the specific needs of maintenance work. For example, some ladder devices are insufficient in load-bearing capacity, stability, and adaptability to complex terrain environments, resulting in safety hazards during the maintenance process. In addition, some ladder devices are complicated to operate and inconvenient to install, which also increases the difficulty and time cost of maintenance work.

[0005] In order to overcome the shortcomings of the existing technology, domestic and foreign researchers have conducted a lot of exploration and attempts. For example, CN209510230U discloses a ladder for generator maintenance, which is composed of two side beams, a plurality of cross beams welded and fixed between the two side beams, and four cross connecting rods extending to the generator stator frame; the upper ends of the two side beams are provided with a top plate for fixing with the upper frame, and the lower ends are provided with a bottom plate for fixing on the ground; the four cross connecting rods extending to the generator stator frame are respectively welded and fixed to the upper and lower parts of the two side beams, and the head end is provided with a connecting plate, and can be connected with the generator stator frame through the connecting plate. It has low cost, small footprint and is easy to use. It is fixed on one side of the generator stator base in the generator wind tunnel, which not only provides convenience for maintenance personnel to climb up to inspect the upper part of the generator stator, but also improves the safety of maintenance personnel climbing up, and can also prevent maintenance personnel from stepping on important components and control cables of the generator equipment during the climbing process, so that the generator equipment is effectively protected. Although the ladder has improved the safety of maintenance operations to a certain extent, it has not been optimized for the specific needs of nose cover maintenance, and its adaptability and portability still need to be improved.

[0006] In summary, the existing maintenance ladder devices for hydropower stations still have many deficiencies when dealing with the maintenance operations of the head covers of hydropower stations. For example, there are problems such as limited load-bearing capacity, poor stability, complex operation, and inconvenient installation. These problems are common in the existing technology and seriously affect the safety and efficiency of the maintenance operations of the head covers of hydropower stations. Therefore, developing a maintenance ladder device specifically designed for the head covers of hydropower stations to improve the efficiency and safety of maintenance operations has become a technical problem urgently to be solved in this field. Summary of the Invention

[0007] The technical problem to be solved by the present utility model is to provide a maintenance ladder for the head cover of a hydropower station, and solve the technical problems of insufficient load-bearing capacity, poor stability, complex operation, and inconvenient installation of the traditional ladder device existing in the maintenance process of the head cover of a hydropower station.

[0008] To solve the above technical problems, the technical solution adopted by the present utility model is: a maintenance ladder for the head cover of a hydropower station, including a support structure, which includes a group of parallel main support rods and several transverse connecting rods, and a support assembly is arranged at the lower end of the main support rods; a climbing assembly is arranged on the support structure, which includes a series of evenly distributed climbing pedals and handrails; an adjusting assembly is installed on the handrails; a fixing device is arranged between the support structure and the head cover of the hydropower station, which includes one or more pairs of adjustable buckle assemblies, and the clamping force is adjusted by rotating the buckle head to achieve tight fixation of head covers with different sizes and shapes, and a safety locking mechanism is provided to prevent loosening.

[0009] In a preferred solution, the support structure is made of low-alloy high-strength steel, that is, the total amount of alloying elements in the steel does not exceed 3%.

[0010] In a preferred solution, the support assembly includes a group of fixed supports fixed at the bottom of the main support rods, and stabilizing plates rotatably connected to both sides of the main support rods. A group of limiting components are arranged on one side of the stabilizing plates, and one end of the limiting components is threadedly connected to the main support rods.

[0011] In a preferred solution, the stabilizing plate includes a group of connecting plates, a support plate is arranged between the group of connecting plates, a group of adjusting struts are arranged at the bottom of the support plate, waist holes and a group of connecting holes are arranged on the connecting plates, the limiting components are installed in the connecting holes on one side connecting plate, and a pin shaft is installed on the other side.

[0012] In a preferred solution, the several climbing pedals are installed between a group of parallel main support rods, and the several handrails are installed on both sides of a group of parallel main support rods.

[0013] In a preferred solution, the adjusting assembly includes a threaded cylinder installed on the reverse side of the handrail, a screw rod is screwed in the threaded cylinder, and a suction cup is installed at the end of the screw rod.

[0014] In a preferred solution, a transverse through hole is provided on the screw rod, and an auxiliary handle is installed in the through hole.

[0015] In a preferred embodiment, the buckle assembly of the fixing device includes a set of sliding sleeves installed on the top of a set of main support rods, a sliding rod is installed inside the sliding sleeve, the sliding rod is arranged in an L shape, and a serration is arranged on the top, and a hole is opened on the top of the sliding sleeve.

[0016] In the preferred embodiment, the safety locking mechanism includes a toothed plate meshing with the serrations at the top of the sliding rod, the toothed plate is clamped in the hole at the top of the sliding sleeve, auxiliary blocks are provided on both sides of the top of the toothed plate, the auxiliary blocks are clamped on the positioning door frame at the top of the sliding sleeve, the positioning door frame is fixed to the top of the sliding sleeve, and sliding grooves are provided on both sides, and the auxiliary blocks are clamped in the sliding grooves.

[0017] In a preferred solution, the safety locking mechanism also includes a locking bolt, a threaded hole is provided on the top of the positioning door frame, the locking bolt is screwed to the top of the positioning door frame, and the front end is in contact with the top of the toothed plate for tightening.

[0018] In the preferred solution, a lighting system is detachably installed on the top of the main support rod. The lighting system uses a rechargeable LED (Light Emitting Diode) lamp, has waterproof and dustproof functions, and is controlled by a remote control or a manual switch. At the same time, the LED lamp has a built-in intelligent sensing system, which will automatically turn off when sufficient light is detected to save energy.

[0019] In a preferred solution, the climbing pedal is made of anti-slip material and has an anti-slip texture on the surface, and the handrail is designed in an arc shape to conform to the holding habits of human hands.

[0020] In a preferred solution, the spacing between the climbing pedals is set to be adjustable, such as by using multiple groups of mounting holes with different spacings to adjust to accommodate maintenance personnel of different heights and climbing habits.

[0021] In a preferred solution, the buckle assembly of the fixing device also includes a spring buffer mechanism arranged on the inner side of the sliding sleeve and the sliding rod to adapt to the different flatness of the load-bearing plate and reduce the impact on the nose cover during the installation process.

[0022] The utility model provides a hydropower station head cover maintenance ladder, which has the following beneficial effects:

[0023] 1. The utility model solves the technical problems of insufficient load-bearing capacity, poor stability, complex operation and inconvenient installation of the traditional ladder device in the process of repairing the head cover of the hydropower station;

[0024] 2. The ladder design of the present utility model has a simple structure and is easy to install, reducing the production cost and installation cost. At the same time, the load-bearing capacity and stability of the ladder are effectively guaranteed, making the maintenance personnel safer and more stable during climbing.

[0025] 3. By enhancing the load-bearing capacity and stability of the ladder device, the present utility model effectively reduces the safety risks in maintenance operations.

[0026] 4. The present utility model also takes into account the anti-slip function, further improving the safety of maintenance personnel. At the same time, the ladder device is detachable, facilitating disassembly and storage after the maintenance of the hydroelectric power station head cover is completed, and is convenient for subsequent use.

[0027] 5. The multiple adjustable mechanisms provided in the present utility model can be adjusted according to the actual situation of the hydroelectric power station head cover, improving the applicability and flexibility of the device. In addition, the device adopts a lightweight design, which is convenient for carrying and transportation, further improving the efficiency of maintenance work.

[0028] 6. The convenient climbing components and adjustable fixing device design of the present utility model enable maintenance personnel to complete maintenance tasks more easily and quickly, thus improving work efficiency.

[0029] 7. The present utility model also adopts a modular design, which is convenient for disassembly and transportation, reducing the maintenance cost. It has been fully verified through multiple field tests and simulation experiments, proving its effectiveness and reliability in practical applications.

[0030] 8. The present utility model uses a high-strength material to make the support structure, combined with anti-slip designed climbing pedals and handrails, and a flexible adjustable buckle-type fixing device, realizing the efficient, safe and convenient installation and use of the maintenance ladder device.

[0031] 9. The present utility model significantly improves the safety and efficiency of the maintenance operation of the hydroelectric power station head cover, reduces the maintenance cost, and has wide practicability and market promotion value.

[0032] 10. The present utility model is not only applicable to the maintenance operation of the hydroelectric power station head cover, but also can be widely applied to other occasions that require climbing and maintenance, such as bridges, buildings, ships, etc., and has broad market prospects and application potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The following further illustrates the present utility model in conjunction with the drawings and embodiments:

[0034] Figure 1 is the overall structural schematic diagram of the present utility model;

[0035] Figure 2 is the cross-sectional view of the fixing device of the present utility model;

[0036] Figure 3 For the present utility model Figure 1 An enlarged schematic view of part A in it;

[0037] In the figure: main support rod 1, transverse connecting rod 2, climbing pedal 3, handrail 4, fixed support 5, stabilizing plate 6, stabilizing plate 6, limiting component 7, threaded cylinder 8, screw rod 9, suction cup 10, sliding sleeve 11, sliding rod 12, toothed plate 13, auxiliary block 14, positioning gantry 15, locking bolt 16, auxiliary handle 17, connecting plate 61, support plate 62, adjusting strut 63, waist-shaped hole 64, connecting hole 65. Specific embodiments

[0038] The technical solutions in the present utility model will be further described below with reference to the accompanying drawings and embodiments:

[0039] Embodiment 1

[0040] As Figures 1 to 3 shown, a maintenance climbing ladder for the head cover of a hydropower station includes a support structure, which includes a group of parallel main support rods 1 and several transverse connecting rods 2, and a support assembly is provided at the lower end of the main support rod 1; a climbing assembly is provided on the support structure, which includes a series of evenly distributed climbing pedals 3 and handrails 4; an adjusting assembly is installed on the handrail 4; a fixing device is provided between the support structure and the head cover of the hydropower station, which includes one or more pairs of adjustable buckle assemblies, and the clamping force is adjusted by rotating the buckle head to achieve tight fixation of head covers of different sizes and shapes, and a safety locking mechanism is provided to prevent loosening.

[0041] In this embodiment, the support structure is made of low-alloy high-strength steel, that is, the total amount of alloying elements in the steel does not exceed 3%.

[0042] Furthermore, the support assembly includes a group of fixed supports 5 fixed at the bottom of the main support rod 1, and stabilizing plates 6 rotatably connected to both sides of the main support rod 1. A group of limiting components 7 are provided on one side of the stabilizing plate 6, and one end of the limiting component 7 is threadedly connected to the main support rod 1.

[0043] Furthermore, the stabilizing plate 6 includes a group of connecting plates 61, a support plate 62 is provided between the group of connecting plates 61, a group of adjusting struts 63 are provided at the bottom of the support plate 62, waist-shaped holes 64 and a group of connecting holes 65 are provided on the connecting plates 61, and the limiting component 7 is installed in the connecting hole 65 on one side connecting plate 61, and a pin shaft is installed on the other side.

[0044] Furthermore, the several climbing pedals 3 are installed between a group of parallel main support rods 1, and the several handrails 4 are installed on both sides of a group of parallel main support rods 1.

[0045] Furthermore, the adjustment assembly includes a threaded barrel 8 installed on the reverse side of the handrail 4 , a screw rod 9 is threadedly connected inside the threaded barrel 8 , and a suction cup 10 is installed at the end of the screw rod 9 .

[0046] Furthermore, the screw rod 9 is provided with a transverse through hole, and an auxiliary handle 17 is installed in the through hole.

[0047] Furthermore, the buckle assembly of the fixing device includes a set of sliding sleeves 11 installed on the top of a set of main support rods 1, a sliding rod 12 is installed inside the sliding sleeve 11, the sliding rod 12 is arranged in an L shape, and a serration is arranged on the top, and a hole is opened on the top of the sliding sleeve 11.

[0048] Furthermore, the safety locking mechanism includes a tooth plate 13 meshing with the serrations at the top of the sliding rod 12, the tooth plate 13 is clamped in the hole at the top of the sliding sleeve 11, auxiliary blocks 14 are provided on both sides of the top of the tooth plate 13, the auxiliary blocks 14 are clamped on the positioning door frame 15 at the top of the sliding sleeve 11, the positioning door frame 15 is fixed to the top of the sliding sleeve 11, and sliding grooves are provided on both sides, and the auxiliary blocks 14 are clamped in the sliding grooves.

[0049] Furthermore, the safety locking mechanism also includes a locking bolt 16. A threaded hole is provided on the top of the positioning door frame 15. The locking bolt 16 is screwed to the top of the positioning door frame 15, and the front end is in contact with the top of the toothed plate 13 for tightening.

[0050] Furthermore, a lighting system is detachably installed on the top of the main support rod 1. The lighting system uses a rechargeable LED lamp, has waterproof and dustproof functions, and is controlled by a remote control or a manual switch. At the same time, the LED lamp has a built-in intelligent sensing system, which will automatically shut down when sufficient light is detected to save energy.

[0051] Furthermore, the climbing pedal 3 is made of anti-slip material and has an anti-slip texture on the surface. The handrail 4 is designed in an arc shape to meet the holding habits of human hands.

[0052] Furthermore, the spacing between the climbing pedals 3 is adjustable, such as by using a plurality of groups of mounting holes with different spacings to adjust the spacing to accommodate maintenance personnel with different heights and climbing habits.

[0053] Furthermore, the buckle assembly of the fixing device also includes a spring buffer mechanism arranged on the inner side of the sliding sleeve 11 and the sliding rod 12 to adapt to the different flatness of the load-bearing plate and reduce the impact on the nose cover during the installation process.

[0054] During specific use, when maintaining the equipment inside the head cover of a hydropower station, move the maintenance climbing ladder for the head cover of the hydropower station, which has passed the installation and commissioning, to the desired position. Hang the L-shaped sliding rod 12 on the load-bearing plate inside the head cover of the hydropower station. Pull the sliding rod 12 back and forth in the sliding sleeve 11 to extend it to an appropriate length. Rotate the locking bolt 16 screwed on the positioning gantry 15 to move downward, and push the toothed plate 13 to engage with the sawteeth at the top of the L-shaped sliding rod 12 to lock the sliding rod 12, and simultaneously fix the maintenance climbing ladder to the load-bearing plate on the head cover of the hydropower station. At the same time, make the bottom fixed support 5 of the support structure contact the ground. Rotate the stabilizing plate 6 and adjust the position of the adjusting strut 63 at the top of the stabilizing plate 6 to make the adjusting strut 63 contact the ground. Rotate the limit component 7 to lock the stabilizing plate 6 to the main support rod 1 of the support structure. Adjust the screw rod 9 to make the suction cup 10 closely adhere to the outer surface of the head cover of the hydropower station. After ensuring that the maintenance climbing ladder is firmly connected to the head cover of the hydropower station, in close contact with and fixed to the ground, the maintenance personnel step on the support plate 62 of the stabilizing plate and the climbing pedal 3 in sequence, and use the handrail 4 to maintain body balance, and gradually climb to the inside of the head cover for maintenance operations. During the climbing process, the anti-slip material and anti-slip texture will effectively prevent the occurrence of slipping accidents and ensure the safety of the maintenance personnel.

[0055] Embodiment 2

[0056] In another preferred embodiment, on the basis of the above Embodiment 1, when the lighting in the maintenance area is insufficient, turn on the rechargeable LED lamp at the top of the main support rod 1 through a remote control or a manual switch to ensure the maintenance effect.

[0057] At the same time, the LED lamp is designed with a waterproof and dustproof structure to ensure stable operation in harsh environments. In addition, the LED lamp is built-in with an intelligent induction system, which will automatically turn off when sufficient light is detected to save electricity.

[0058] Embodiment 3

[0059] In another preferred embodiment, on the basis of the above Embodiment 1, when the shape of the load-bearing plate inside the head cover of the hydropower station is irregular, a spring buffer mechanism is arranged inside the snap component of the fixing device, the sliding sleeve and the sliding rod to adapt to the different flatness of the load-bearing plate and reduce the impact on the head cover during the installation process.

[0060] Embodiment 4

[0061] In another preferred embodiment, on the basis of the above Embodiment 1, when the maintenance personnel are relatively tall or have a large climbing span, the distance between the climbing pedals 3 can be adjusted through the mounting holes with different spacings to adapt to the maintenance personnel, so as to improve the working habits and safety of the maintenance personnel.

[0062] In a preferred embodiment, the support structure is made of high-strength low-alloy steel, that is, the total amount of alloying elements in the steel does not exceed 3%. With the above arrangement, the support structure has sufficient strength, good toughness and corrosion resistance, and can be used for a long time in harsh environments without deformation or damage. In addition, the high-strength low-alloy steel material also has high workability and weldability, which is convenient for production and installation.

[0063] In a preferred embodiment, the support assembly includes a set of fixed supports 5 fixed to the bottom of the main support rod 1 and stabilizing plates 6 rotatably connected to both sides of the main support rod 1. A set of limiting components 7 are provided on one side of the stabilizing plate 6, and one end of the limiting component 7 is threadedly connected to the main support rod 1. With the above arrangement, the angle of the stabilizing plate 6 can be adjusted, and the stabilizing plate 6 can be fixed by the limiting component 7, improving the overall stability and avoiding shaking and tilting caused by factors such as excessive wind force, ensuring the safety and stability of use.

[0064] In a preferred embodiment, the stabilizing plate 6 includes a set of connecting plates 61, a support plate 62 is arranged between the set of connecting plates 61, a set of adjusting struts 63 are arranged at the bottom of the support plate 62, waist holes 64 and a set of connecting holes 65 are arranged on the connecting plates 61, the limiting component 7 is installed in the connecting hole 65 on one side connecting plate 61, and a pin shaft is installed on the other side. With the above arrangement, the movable adjustment of the stabilizing plate 6 can be realized, and it can be locked with the main support rod 1 after adjustment.

[0065] In a preferred embodiment, the several climbing pedals 3 are installed between a set of parallel main support rods 1, and the several handrails 4 are installed on both sides of a set of parallel main support rods 1. With the above arrangement, maintenance personnel can stably hold the handrails and step on the climbing pedals 3 during climbing, so as to maintain the balance and stability of the body. In addition, the design of the main support rod 1 ensures the structural stability and provides a safe climbing environment for maintenance personnel.

[0066] In a preferred embodiment, the adjusting assembly includes a threaded cylinder 8 installed on the reverse side of the handrail 4, a screw rod 9 is screwed in the threaded cylinder 8, and a suction cup 10 is installed at the end of the screw rod 9. With the above arrangement, by rotating the screw rod 9, the screw rod 9 moves in the threaded cylinder 8, and then drives the front and back movement of the suction cup 10, thereby changing the distance between the suction cup 10 and the head cover of the hydropower station, adapting to the different regional shapes of the head cover of the hydropower station, and enhancing the stability of the maintenance climbing ladder.

[0067] In a preferred embodiment, a transverse through hole is provided on the screw rod 9, and an auxiliary handle 17 is installed in the through hole. With the above arrangement, it is convenient to operate, improves the efficiency of maintenance work, and protects maintenance personnel.

[0068] In a preferred embodiment, the buckle assembly of the fixing device includes a group of sliding sleeves 11 installed on the top of a group of main support rods 1, a sliding rod 12 is installed inside the sliding sleeve 11, the sliding rod 12 is arranged in an L shape, and a serration is arranged on the top, and a hole is opened on the top of the sliding sleeve 11; the above arrangement can adapt to the fixation of objects of different sizes by adjusting the position of the sliding rod 12 in the sliding sleeve 11, thereby enhancing the applicability of the device; the serration design makes the sliding rod 12 have better stability when fixed, and prevents it from sliding or loosening.

[0069] In the preferred solution, the safety locking mechanism includes a tooth plate 13 meshing with the serrations at the top of the sliding rod 12, the tooth plate 13 is clamped in the hole at the top of the sliding sleeve 11, and auxiliary blocks 14 are provided on both sides of the top of the tooth plate 13, the auxiliary blocks 14 are clamped on the positioning door frame 15 at the top of the sliding sleeve 11, the positioning door frame 15 is fixed to the top of the sliding sleeve 11, and sliding grooves are provided on both sides, and the auxiliary blocks 14 are clamped in the sliding grooves; the above arrangement realizes the stable installation of the tooth plate 13 at the top of the sliding sleeve 11, and the tooth plate 13 can slide along the sliding groove of the positioning door frame 15, thereby adjusting the meshing position of the tooth plate 13 and the serrations at the top of the sliding rod 12, thereby realizing the positioning and locking of the sliding rod 12.

[0070] In the preferred scheme, the safety locking mechanism also includes a locking bolt 16, and a threaded hole is provided at the top of the positioning door frame 15. The locking bolt 16 is screwed to the top of the positioning door frame 15, and the front end is in contact with the top of the tooth plate 13 for tightening; with the above arrangement, the tooth plate 13 and the positioning door frame 15 are locked and fixed by the locking bolt 16, so that the tooth plate 13 cannot move, thereby realizing the locking and fixing of the sliding rod 12, thereby improving the stability and safety of the maintenance ladder and the head cover of the hydropower station.

[0071] In the preferred scheme, a lighting system is detachably installed on the top of the main support rod 1. The lighting system adopts a rechargeable LED lamp, has waterproof and dustproof functions, and is controlled by a remote control or a manual switch. At the same time, the LED lamp has a built-in intelligent sensing system, which will automatically shut down when sufficient light is detected to save electricity. The above settings can provide lighting at night or when there is insufficient light, provide a good working environment for maintenance personnel, ensure maintenance results, avoid unnecessary waste of electricity, and ensure the energy saving and environmental protection of the equipment.

[0072] In the preferred solution, the climbing pedal 3 is made of anti-slip material and has an anti-slip texture on the surface. The handrail 4 adopts an arc-shaped design to conform to the human hand holding habit. The above settings make the maintenance personnel safer and more comfortable during the climbing process.

[0073] In a preferred embodiment, the spacing between the climbing pedals 3 is adjustable. For example, multiple sets of mounting holes with different spacings can be used for adjustment to accommodate maintenance personnel of different heights and climbing habits. The above settings are aimed at improving the comfort and safety of maintenance work. At the same time, the surface of the climbing pedal 3 is designed with anti-slip textures to enhance the grip and prevent accidental slips in wet or oily environments. In addition, maintenance personnel are required to wear safety ropes to ensure their safety during climbing.

[0074] In a preferred embodiment, the buckle assembly of the fixing device further includes a spring buffer mechanism provided inside the sliding sleeve 11 and the sliding rod 12 to adapt to the different flatness of the bearing plate and reduce the impact on the machine head cover during installation. With the above settings, when the buckle assembly is locked, the spring buffer mechanism can be used for buffering to avoid excessive impact on the machine head cover, and at the same time, it can adapt to bearing plates with different flatness, improving the stability and reliability of installation.

[0075] In summary, the present utility model provides a maintenance ladder for a hydropower station machine head cover, which solves the technical problems existing in the maintenance of the traditional ladder device for the hydropower station machine head cover, such as insufficient load-bearing capacity, poor stability, complex operation, and inconvenient installation. By enhancing the load-bearing capacity and stability of the ladder device, the safety risks during maintenance operations are effectively reduced. Through the support structure made of high-strength materials, combined with the anti-slip designed climbing pedals and handrails, and the flexible adjustable buckle-type fixing device, the efficient, safe, and convenient installation and use of the maintenance ladder device are realized. Through the multiple adjustable mechanisms provided, it can be adjusted according to the actual situation of the hydropower station machine head cover, improving the applicability and flexibility of the device. In addition, the device adopts a lightweight design, which is convenient for carrying and transportation, further improving the efficiency of maintenance work. At the same time, the ladder device also has excellent durability and corrosion resistance, and can adapt to the complex and changeable working environment of the hydropower station, providing a safer, more efficient, and more convenient solution for the maintenance work of the hydropower station machine head cover. The convenient climbing component and adjustable fixing device design of the present utility model enable maintenance personnel to complete maintenance tasks more easily and quickly, thus improving work efficiency. The ladder design of the present utility model has a simple structure and convenient installation, reducing production costs and installation costs. At the same time, the load-bearing capacity and stability of the ladder are effectively guaranteed, making maintenance personnel safer and more stable during climbing. Through practice, the safety and efficiency of the maintenance operation of the hydropower station machine head cover are significantly improved, the maintenance cost is reduced, and it has wide practicability and market promotion value. The present utility model is not only applicable to the maintenance operation of the hydropower station machine head cover, but also can be widely applied to other occasions that require climbing and maintenance, such as bridges, buildings, ships, etc., and has broad market prospects and application potential.

Claims

1. A ladder for inspecting and repairing a head cover of a hydropower station, characterized in that: The invention comprises a support structure, which comprises a group of parallel main support rods (1) and a plurality of transverse connecting rods (2), wherein a support assembly is arranged at the lower end of the main support rod (1); a climbing assembly is arranged on the support structure, which comprises a series of evenly distributed climbing pedals (3) and handrails (4); an adjustment assembly is installed on the handrail (4); a fixing device is arranged between the support structure and the head cover of the hydropower station, which comprises one or more pairs of adjustable buckle assemblies, and the clamping force is adjusted by rotating the buckle head to achieve tight fixation of head covers of different sizes and shapes, and a safety locking mechanism is arranged to prevent loosening.

2. A hydropower station hood maintenance ladder according to claim 1, characterized in that: The supporting structure is made of low-alloy high-strength steel material.

3. A hydropower station hood maintenance ladder according to claim 1, characterized in that: The support assembly comprises a group of fixed supports (5) fixed to the bottom of the main support rod (1), and stabilizing plates (6) rotatably connected to both sides of the main support rod (1), a group of limit assemblies (7) being arranged on one side of the stabilizing plate (6), and one end of the limit assemblies (7) being threadedly connected to the main support rod (1).

4. A hydropower station hood maintenance ladder according to claim 3, characterized in that: The stabilizing plate (6) comprises a group of connecting plates (61), a supporting plate (62) is arranged between the group of connecting plates (61), a group of adjusting pillars (63) are arranged at the bottom of the supporting plate (62), waist holes (64) and a group of connecting holes (65) are arranged on the connecting plates (61), a limiting assembly (7) is installed in the connecting hole (65) on one side of the connecting plate (61), and a pin is installed in the other side.

5. A hydropower station hood maintenance ladder according to claim 1, characterized in that: The plurality of climbing pedals (3) are installed between a group of parallel main support rods (1), and the plurality of handrails (4) are installed on both sides of the group of parallel main support rods (1).

6. A hydropower station hood maintenance ladder according to claim 5, characterized in that: The adjustment assembly comprises a threaded barrel (8) mounted on the reverse side of the handrail (4), a screw rod (9) being threadedly connected inside the threaded barrel (8), and a suction cup (10) being mounted on the end of the screw rod (9).

7. A hydropower station hood maintenance ladder according to claim 1, characterized in that: The buckle assembly of the fixing device comprises a set of sliding sleeves (11) mounted on the top of a set of main support rods (1), a sliding rod (12) is mounted inside the sliding sleeves (11), the sliding rod (12) is arranged in an L shape and has saw teeth on the top, and a hole is opened on the top of the sliding sleeves (11).

8. A hydropower station hood maintenance ladder according to claim 7, characterized in that: The safety locking mechanism comprises a toothed plate (13) meshed with the saw teeth at the top of the sliding rod (12); the toothed plate (13) is clamped in a hole at the top of the sliding sleeve (11); auxiliary blocks (14) are arranged on both sides of the top of the toothed plate (13); the auxiliary blocks (14) are clamped on a positioning door frame (15) at the top of the sliding sleeve (11); the positioning door frame (15) is fixed to the top of the sliding sleeve (11); slide grooves are arranged on both sides; the auxiliary blocks (14) are clamped in the slide grooves.

9. A hydropower station hood maintenance ladder according to claim 8, characterized in that: The safety locking mechanism also includes a locking bolt (16). A threaded hole is provided on the top of the positioning door frame (15). The locking bolt (16) is screwed to the top of the positioning door frame (15), and the front end is in contact with the top of the toothed plate (13) for tightening.

10. A hydropower station hood maintenance ladder according to claim 1, characterized in that: The top of the main support rod (1) is detachably mounted with a lighting system, which uses a rechargeable LED lamp, has waterproof and dustproof functions, and is controlled by a remote control or a manual switch.

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