A folding ladder for a generator

Abstract

This utility model discloses a folding ladder for generators, including a support frame and a ladder assembly. The ladder assembly includes a base ladder fixed to the top of the support frame and at least one extended ladder. Any two adjacent extended ladders are hinged together by an extension hinge. The bottom end of the lowest extended ladder is hinged to the top of the base ladder by a base hinge. The rotation axes of the extension hinge and the base hinge extend horizontally and are perpendicular to the arrangement direction of the ladder assembly, allowing the extended ladder to flip backward and engage with the base ladder. The ladder assembly is provided with several steps that are evenly arranged and spaced along the arrangement direction of the ladder assembly. A walking device is provided at the bottom of the support frame. This folding ladder for generators is simple and easy to operate, effectively improving the efficiency of generator maintenance and reducing the labor intensity of workers.

Description

Technical Field

[0001] This utility model relates to the technical field of supporting equipment for the maintenance and repair of nuclear power plant generator sets, and in particular to a folding ladder for generators. Background Technology

[0002] The stator of a typical nuclear power plant generator is 3.92 meters high. During each major overhaul of the unit, there are tasks that need to be carried out on the top of the generator stator, such as hoisting the hydrogen cooler, disassembling and installing the generator stator cooling water pipes, inspecting the inside of the generator stator and handling defects. During the operation, personnel need to climb from the bottom of the generator equipment to the top of the stator to reach the corresponding work surface.

[0003] Currently, during maintenance work on nuclear power plant generator units, when work is carried out on the top of the generator stator, maintenance personnel use makeshift ladders made of temporary scaffolding and metal components to move up and down the generator stator to perform the aforementioned maintenance work. However, when using these existing makeshift ladders, personnel need to step on the scaffolding to move up and down. Due to the significant drop in elevation, there is a risk of slipping and falling, which can easily lead to accidents and personal injury to workers.

[0004] Furthermore, the current process of setting up the aforementioned simple ladders is not easy. Considering that nuclear power plants typically need to carry out four major overhauls of generator units each year, and that temporary ladders need to be re-erected for each overhaul to complete the work, the repeated process of setting up ladders consumes a lot of manpower and resources. This repetitive labor process of non-core operations results in a large waste of resources, restricts the efficiency of nuclear power plant generator unit maintenance, and increases the labor intensity of staff.

[0005] In view of this, how to make the ladder operation during nuclear power plant generator climbing work simpler and easier, so as to improve the efficiency of corresponding generator maintenance work and reduce the labor intensity of workers, is an important technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of this utility model is to provide a folding ladder for generators. The operation and use of this folding ladder for generators is simple and easy, which can effectively improve the efficiency of generator maintenance and reduce the labor intensity of workers.

[0007] To solve the above-mentioned technical problems, this utility model provides a folding ladder for a generator, including a support frame and a ladder frame assembly inclinedly arranged on the support frame, wherein the ladder frame assembly includes a reference ladder frame fixedly disposed on the top of the support frame;

[0008] The ladder frame assembly further includes at least one extended ladder frame. Each of the extended ladder frames and the reference ladder frame are arranged sequentially from top to bottom along the arrangement direction of the ladder frame assembly. Any two adjacent extended ladder frames are hinged together by an extended hinge. The bottom end of the bottom extended ladder frame is hinged to the top end of the reference ladder frame by a reference hinge. The rotation axes of the extended hinge and the reference hinge extend horizontally and are perpendicular to the arrangement direction of the ladder frame assembly, so that the extended ladder frame can be flipped backward and engaged with the reference ladder frame.

[0009] The ladder assembly is provided with a number of steps that are evenly arranged and interlocked along the arrangement direction of the ladder assembly.

[0010] The bottom of the support frame is equipped with a walking device.

[0011] Preferably, the top of the extended ladder is provided with a positioning support plate that can be attached to the working surface on top of the generator.

[0012] Preferably, a positioning handrail is provided on the top of the positioning support plate.

[0013] Preferably, a climbing handrail is detachably provided on the side edge of the upper surface of the ladder assembly, the climbing handrail extends along the arrangement direction of the ladder assembly, and the top of the climbing handrail is connected to the positioning handrail.

[0014] Preferably, the upper surface side edge of the ladder assembly has a plurality of positioning holes, and the climbing handrail includes a plurality of vertical support rods extending in the vertical direction, the vertical support rods being inserted into the positioning holes one by one.

[0015] Preferably, the walking device is an array of casters arranged on the bottom surface of the support frame.

[0016] Preferably, the bottom surface of the support frame is further provided with a limiting support foot, and the limiting support foot is threadedly connected to the support frame with a lifting adjustment bolt.

[0017] Preferably, the top and / or side of the support frame are provided with an extension strut, the top end of the extension strut is connected to the bottom surface of the extension ladder frame, and the bottom end of the extension strut is connected to the support frame.

[0018] Preferably, the support frame is a truss structure.

[0019] Preferably, the top surface of the pedal extends horizontally, and the top surface of the pedal is covered with an anti-slip insulating protective layer.

[0020] Compared to the aforementioned background technology, the folding ladder for generators provided by this utility model, during operation, when it is necessary to carry out maintenance or repair work on the top of tall equipment such as the stator of a nuclear power plant generator set, can be moved as a whole to the target work position near the generator where the work needs to be carried out by a walking device. Then, the extended ladder frame is flipped forward in sequence around the reference hinge and each extended hinge, so that each extended ladder frame flips to the extended state one by one, so that each extended hinge can cooperate with the reference hinge to form a large-size long-distance inclined ladder structure that extends sequentially along the arrangement direction of the ladder frame assembly, so that workers can climb to the position above the generator by stepping on each step, thereby reaching the work position where the corresponding high-level work can be carried out. After the corresponding high-level operation of the generator is completed, the worker gradually descends along each step until returning to the ground, thus ending the high-level operation process for a single engine. Afterwards, each extended ladder frame can be flipped backwards one by one around its respective extended hinge and the base hinge until all extended hinges are folded up to the top of the base ladder frame, allowing each extended ladder frame to fold and engage with the base ladder frame. This makes the overall component structure of the generator folding ladder more compact and reduces space occupation. Then, the folded generator folding ladder can be moved away from the current work position using a walking device, allowing it to be moved to the next work position or transported to a storage space for retrieval during the next high-level operation. The generator folding ladder relies on the coordinated operation of each ladder frame and each hinge to form a folding ladder mechanism that can be flexibly extended, opened, flipped, and folded. This significantly reduces the difficulty of using the ladder when performing high-level operations on tall components such as the engine stator, making the erection and dismantling of the ladder simpler and more efficient. Consequently, the maintenance and repair of the corresponding nuclear power plant generator sets becomes smoother and more efficient, and the labor intensity of the relevant personnel is also significantly reduced.

[0021] In another preferred embodiment of this utility model, the top of the extended ladder frame at the very top is provided with a positioning support plate that protrudes horizontally and can overlap with the working surface on top of the generator. After the extended ladder frame is flipped forward and fully unfolded, the positioning support plate can be reliably overlapped and fixed to the top of the generator at the target location. This ensures that the folding ladder for the generator can be installed more stably and reliably on the main structure of the generator where high-level operations are required. This further improves the overall installation structural strength of the folding ladder for the generator, optimizes the load-bearing capacity and stress resistance of the folding ladder during the climbing and stepping process of the workers, improves the stability of its main structure, and prevents the main structure of the ladder from loosening or overturning. This further improves the operational safety during related operations, and the personal safety of the relevant workers is also further guaranteed. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the assembly structure of a folding ladder for a generator in its extended state with a generator, according to a specific embodiment of this utility model.

[0024] Figure 2 for Figure 1 A side view of the structure of a folding ladder for a generator.

[0025] Figure 3 for Figure 1 A schematic diagram of the structure of a folding ladder for a generator in its folded state.

[0026] in:

[0027] 11-Support frame; 111-Extension strut;

[0028] 12-Reference ladder frame; 121-Reference hinge; 122-Clamping plate;

[0029] 13-Extended ladder frame; 131-Positioning support plate; 132-Universal lifting ring; 133-Positioning handrail;

[0030] 14-Pedal;

[0031] 15-Swivel casters;

[0032] 16-Climbing handrail; 161-Positioning hole; 162-Vertical support rod; 163-Horizontal support rod;

[0033] 17-Limit support foot; 171-Lifting adjustment bolt;

[0034] 20 - Generator. Detailed Implementation

[0035] The core of this utility model is to provide a folding ladder for generators. The operation and use of this folding ladder for generators is simple and easy, which can effectively improve the efficiency of corresponding generator maintenance work and reduce the labor intensity of workers.

[0036] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] It should be noted in advance that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] Furthermore, in this invention, unless otherwise explicitly specified and limited, the first feature being "on" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features not being in direct contact but through another feature between them.

[0039] In addition, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "under," and "beneath" for the first feature and the second feature include the first feature being directly below or diagonally below the second feature, or simply indicating that the first feature is at a lower horizontal level than the second feature. The terms "above," "below," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] In specific implementations, such as Figures 1 to 3 As shown, the folding ladder for generators provided by this utility model includes a support frame 11 and a ladder frame assembly inclinedly arranged on the support frame 11. The ladder frame assembly includes a reference ladder frame 12 fixedly installed on the top of the support frame 11.

[0041] The ladder assembly also includes at least one extended ladder 13. Each extended ladder 13 and the base ladder 12 are arranged sequentially from top to bottom along the arrangement direction of the ladder assembly. Any two adjacent extended ladders 13 are hinged together by an extended hinge. The bottom end of the lowest extended ladder 13 is hinged to the top end of the base ladder 12 by a base hinge 121. The rotation axes of the extended hinge and the base hinge 121 extend horizontally and are perpendicular to the arrangement direction of the ladder assembly, so that the extended ladder 13 can be flipped backward and engaged with the base ladder 12.

[0042] The ladder assembly is provided with several treads 14 that are evenly arranged and interlocked along the direction of the ladder assembly; and the bottom of the support frame 11 is provided with a walking device.

[0043] Thus, in the specific operation and use of the generator folding ladder, when it is necessary to carry out maintenance and repair work on the top of tall equipment such as the stator of the nuclear power plant generator set, the generator folding ladder can be moved as a whole to the target work position near the generator 20 where the work needs to be carried out by the walking device. Then, the extended ladder frame 13 is flipped forward in sequence around the reference hinge 121 and each extended hinge, so that each extended ladder frame 13 is flipped to the extended state one by one, so that each extended hinge can cooperate with the reference hinge 121 to form a large-size long-distance inclined ladder structure that extends sequentially along the arrangement direction of the ladder frame assembly, so that the workers can climb to the position above the generator 20 by stepping on each step 14, thereby reaching the work position where the corresponding high-level work can be carried out.

[0044] After the corresponding generator 20 has completed its high-level operation, the worker gradually descends along each step 14 until returning to the ground, thus ending the high-level operation process for a single engine. Afterwards, each extended ladder 13 can be flipped backwards one by one around each extended hinge and the base hinge 121 until each extended hinge is folded up to the top of the base ladder 12, allowing each extended ladder 13 to fold and engage with the base ladder 12. This makes the overall structure of the generator folding ladder more compact and reduces space occupation. Then, the folded generator folding ladder can be moved away from the current work position using a walking device, allowing it to be moved to the next work position or transported to a storage space for retrieval during the next high-level operation. The generator folding ladder relies on the coordinated operation of each ladder frame and each hinge to form a folding ladder mechanism that can be flexibly extended, opened, flipped, and folded. This significantly reduces the difficulty of using the ladder when performing high-level operations on tall components such as the engine stator, making the erection and dismantling of the ladder simpler and more efficient. Consequently, the maintenance and repair of the corresponding nuclear power plant generator sets becomes smoother and more efficient, and the labor intensity of the relevant personnel is also significantly reduced.

[0045] It should be noted that, based on Figure 1 and Figure 3 As shown, in this solution, when referring to the flipping of the extended ladder frame 13, the term "forward flipping" refers to... Figure 1 Rotate counterclockwise as shown to achieve the following Figure 1 The extended ladder 13 is fully extended to the same direction as the reference ladder 12; while flipping backward refers to... Figure 1 Rotate clockwise as shown to achieve the following Figure 3The diagram shows the extended ladder frame 13 fully retracted and locked parallel to the base ladder frame 12. All other parts of this design involving forward and backward flipping can be understood by referring to this diagram and the accompanying drawings; further details are omitted here.

[0046] It is easy to understand that, in practical applications, the end of the extended ladder frame 13 near the extended hinge and the end of the base ladder frame 12 near the base hinge 121 can be respectively equipped with locking pins or locking plates 122, etc., to ensure the extension positioning accuracy and reliability of the extended ladder frame 13 after the extended ladder frame 13 has completed its flipping and extension. This is to prevent the extended ladder frame 13 from being loosened, misaligned, or structurally failed due to excessive flipping, thereby further ensuring the overall structural strength and stress resistance of the generator folding ladder, and further improving the safety of workers climbing the generator folding ladder.

[0047] It is not difficult to see that, Figures 1 to 3 The ladder assembly shown consists of a base ladder 12 and an extended ladder 13. This simplified assembly structure serves to illustrate the technical details of the solution. In practical applications, the number of extended ladders 13 is not limited to one as shown in the figure. The number of extended ladders 13 can be flexibly selected and adjusted according to the specific working height and construction requirements under actual working conditions. Correspondingly, the dimensions of a single extended ladder 13 can also be flexibly selected and adjusted according to specific working conditions. The dimensions of the base ladder 12 should be selected based on the main structural dimensions of the support frame 11 and the actual load-bearing requirements. In principle, the core design effect should be to safely and reliably meet the high-level operation requirements of the generator 20 and ensure the safety of climbing operations using the generator's folding ladder.

[0048] Generally, the support frame 11 is a truss structure to further optimize the load-bearing capacity and structural strength of the support frame 11, ensure its support effect on the main structure of the generator folding ladder and the staff on the generator folding ladder, and improve the structural reliability and safety of the generator folding ladder.

[0049] Furthermore, to further optimize the safety of workers operating on the generator's folding ladder, the top surface of the step 14 is preferably arranged to extend horizontally to ensure stable footing. Additionally, a non-slip insulating layer can be covered on the top surface of the step 14. This layer can be made of rubber, silicone, or engineering plastic to increase the contact friction between the worker's shoes and the top surface of the step 14, preventing slippage during climbing and effectively ensuring insulation at the step 14. This further prevents electric shock and other safety accidents during operations, ensuring the worker's personal safety.

[0050] Of course, several anti-slip strips can be protruded or several anti-slip grooves can be recessed on the top surface of the pedal 14 to further increase the anti-slip effect between the top surface of the pedal 14 and the sole of the worker's shoes, making the worker's stepping process more stable and efficient.

[0051] Specifically, the top of the extended ladder 13, located at the very top, has a horizontally protruding positioning support plate 131 that can overlap with the working surface on top of the generator 20. After the extended ladder 13 is flipped forward and fully unfolded, the positioning support plate 131 can be reliably overlapped and fixed to the top of the generator 20 at the target position. This ensures that the folding ladder for the generator can be installed more stably and reliably on the main structure of the generator 20, which requires high-level operations. This further improves the overall installation structural strength of the folding ladder for the generator, optimizes the load-bearing capacity and stress resistance of the folding ladder during the climbing and stepping process of the workers, improves the stability of its main structure, and prevents the main structure of the ladder from loosening or overturning. This further improves the operational safety during related operations, and the personal safety of the relevant workers is also further guaranteed.

[0052] Generally, the protruding end of the positioning support plate 131 is also equipped with a universal lifting ring 132, which serves as a connection part and force point for the hoisting equipment when the extension ladder 13 is rotated, so as to complete the rotation and unfolding action of the extension ladder 13 through hoisting assistance. In addition, after the positioning support plate 131 is aligned and overlapped on the top working surface of the generator 20, the universal lifting ring 132 can be inserted or snapped into the top working surface of the generator 20 to achieve auxiliary positioning and installation of the positioning support plate 131, thereby further improving the installation stability of the positioning support plate 131 on the working surface of the generator 20 and ensuring the safety of subsequent operations.

[0053] More specifically, a positioning handrail 133 is provided on the top of the positioning support plate 131. After reaching the high working surface where the positioning support plate 131 is located, the worker can hold onto the positioning handrail 133 to obtain a stable and reliable arm support point, ensure body balance, and prevent the worker from stepping into the air or falling from the positioning support plate 131, thereby further improving the worker's work safety.

[0054] Based on this, a climbing handrail 16 is detachably installed on the side edge of the upper surface of the ladder assembly. The climbing handrail 16 extends along the arrangement direction of the ladder assembly, and its top end is connected to the positioning handrail 133. This climbing handrail 16 serves as a climbing auxiliary structure for the ladder assembly, providing a stable arm support point for workers. This allows workers to obtain upper body support by gripping the positioning handrail 133 when climbing or moving down the ladder assembly, further improving the stability and safety of workers when moving back and forth on the generator folding ladder.

[0055] Furthermore, the upper surface of the ladder frame assembly has several positioning holes 161 on its side edge. The climbing handrail 16 includes several vertical support rods 162 extending in the vertical direction, and the vertical support rods 162 are inserted into the positioning holes 161 one by one. This insertion structure has high alignment accuracy, making the assembly connection between the climbing handrail 16 and the main structure of the ladder frame assembly stable and reliable. In addition, when the generator folding ladder is not in use, the vertical support rods 162 can be pulled out from the positioning holes 161 to remove the climbing handrail 16 from the ladder frame assembly, thereby ensuring the flipping and folding effect of each extended ladder frame 13, making the overall structure of the generator folding ladder more compact after the ladder frame assembly is folded, and requiring less storage space when the folding ladder is stored as a whole.

[0056] As shown in the figure, it is easy to see that in addition to the vertical support rods 162 extending in the vertical direction, the climbing handrail 16 also has horizontal support rods 163 extending roughly along the arrangement direction of the ladder frame assembly. Relying on the cross arrangement and reliable connection of the horizontal support rods 163 and the vertical support rods 162, the climbing handrail 16 forms a stable and reliable frame structure, thereby ensuring the structural strength and stress resistance of the climbing handrail 16, so as to provide sufficient and reliable auxiliary support for the staff.

[0057] On the other hand, the walking device consists of casters 15 arranged in an array on the bottom surface of the support frame 11. These casters 15 are typically polyurethane wheels and are equipped with brake components to stop and lock the casters 15 after reaching the target position to complete parking, thereby preventing the walking device from shaking or moving during subsequent climbing operations and further ensuring operational safety.

[0058] Correspondingly, the bottom surface of the support frame 11 is also provided with a protruding limiting support leg 17, and a lifting adjustment bolt 171 is threadedly connected between the limiting support leg 17 and the support frame 11. When the generator folding ladder moves, the limiting support leg 17 is in an upward retracted state to ensure that the caster wheel 15 can fully contact the ground, making the movement of the generator folding ladder more stable and smooth. After the generator folding ladder is moved to the target position, the lifting adjustment bolt 171 can be turned to extend the limiting support leg 17 downward until the extension height of the limiting support leg 17 is greater than the effective height of the caster wheel 15, so that the limiting support leg 17 serves as the ground contact component of the generator folding ladder, so that the caster wheel 15 is suspended in the air and decoupled from the ground, thereby fully ensuring the reliable support and stable arrangement of the generator folding ladder in the current position. When the generator folding ladder needs to be moved again, simply turn the lifting adjustment bolt 171 to retract the limit support foot 17 upwards until the extended height of the limit support foot 17 is less than the effective height of the caster wheel 15, so that the caster wheel 15 can re-contact the ground. The entire folding ladder for the generator can then be moved by rolling the caster wheel 15.

[0059] In addition, the top and / or sides of the support frame 11 are provided with extension struts 111. The top end of the extension struts 111 is connected to the bottom surface of the extension ladder frame 13, and the bottom end of the extension struts 111 is connected to the support frame 11. The extension struts 111 can provide sufficient and reliable structural support for the extension ladder frame 13 to improve the load-bearing capacity of the extension ladder frame 13. This makes the generator folding ladder structure more stable and reliable after it is fully extended and erected, and makes the operation process of the workers on the generator folding ladder safer and smoother.

[0060] In summary, the folding ladder for generators provided in this utility model can be used to move the entire folding ladder to the target work position near the generator when maintenance or repair work is required on the top of tall equipment such as the stator of a nuclear power plant generator set. Then, the extended ladder frame is flipped forward sequentially around the reference hinge and each extended hinge, so that each extended ladder frame is flipped to the extended state one by one. This allows each extended hinge to cooperate with the reference hinge to form a large-size, long-distance inclined ladder structure that extends sequentially along the arrangement direction of the ladder frame assembly. This allows workers to climb to the top of the generator by stepping on each step, thereby reaching the work position where corresponding high-level work can be carried out. After the corresponding high-level operation of the generator is completed, the worker gradually descends along each step until returning to the ground, thus ending the high-level operation process for a single engine. Afterwards, each extended ladder frame can be flipped backwards one by one around its respective extended hinge and the base hinge until all extended hinges are folded up to the top of the base ladder frame, allowing each extended ladder frame to fold and engage with the base ladder frame. This makes the overall component structure of the generator folding ladder more compact and reduces space occupation. Then, the folded generator folding ladder can be moved away from the current work position using a walking device, allowing it to be moved to the next work position or transported to a storage space for retrieval during the next high-level operation. The generator folding ladder relies on the coordinated operation of each ladder frame and each hinge to form a folding ladder mechanism that can be flexibly extended, opened, flipped, and folded. This significantly reduces the difficulty of using the ladder when performing high-level operations on tall components such as the engine stator, making the erection and dismantling of the ladder simpler and more efficient. Consequently, the maintenance and repair of the corresponding nuclear power plant generator sets becomes smoother and more efficient, and the labor intensity of the relevant personnel is also significantly reduced.

[0061] The folding ladder for generators provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A folding ladder for a generator, characterized in that, It includes a support frame and a ladder assembly inclinedly arranged on the support frame, the ladder assembly including a reference ladder fixedly disposed on the top of the support frame; The ladder frame assembly further includes at least one extended ladder frame. Each of the extended ladder frames and the reference ladder frame are arranged sequentially from top to bottom along the arrangement direction of the ladder frame assembly. Any two adjacent extended ladder frames are hinged together by an extended hinge. The bottom end of the bottom extended ladder frame is hinged to the top end of the reference ladder frame by a reference hinge. The rotation axes of the extended hinge and the reference hinge extend horizontally and are perpendicular to the arrangement direction of the ladder frame assembly, so that the extended ladder frame can be flipped backward and engaged with the reference ladder frame. The ladder assembly is provided with a number of steps that are evenly arranged and interlocked along the arrangement direction of the ladder assembly. The bottom of the support frame is equipped with a walking device.

2. The folding ladder for a generator as described in claim 1, characterized in that, The top of the extended ladder is horizontally protruding and has a positioning support plate that can be attached to the working surface on top of the generator.

3. The folding ladder for a generator as described in claim 2, characterized in that, The top of the positioning support plate is provided with a positioning handrail.

4. The folding ladder for a generator as described in claim 3, characterized in that, A climbing handrail is detachably installed on the side edge of the upper surface of the ladder assembly. The climbing handrail extends along the arrangement direction of the ladder assembly, and the top of the climbing handrail is connected to the positioning handrail.

5. The folding ladder for a generator as described in claim 4, characterized in that, The upper surface of the ladder assembly has several positioning holes on its side edge, and the climbing handrail includes several vertical support rods extending in the vertical direction, with each vertical support rod being inserted into one of the positioning holes.

6. The folding ladder for a generator as described in claim 1, characterized in that, The walking device consists of omnidirectional wheels arranged in an array on the bottom surface of the support frame.

7. The folding ladder for a generator as described in claim 6, characterized in that, The bottom surface of the support frame is also provided with a limit support foot, and the limit support foot is threadedly connected to the support frame with a lifting adjustment bolt.

8. The folding ladder for a generator as described in claim 1, characterized in that, The support frame is provided with an extension strut on its top and / or side. The top end of the extension strut is connected to the bottom surface of the extension ladder frame, and the bottom end of the extension strut is connected to the support frame.

9. The folding ladder for a generator as described in claim 1, characterized in that, The support frame is a truss structure.

10. The folding ladder for a generator as described in claim 1, characterized in that, The top surface of the pedal extends horizontally and is covered with an anti-slip insulating protective layer.

Images