Lightweight high-strength antiskid insulating composite material maintenance ladder

Abstract

The utility model discloses a light high-strength anti-slip insulating composite material maintenance ladder, which comprises two groups of maintenance ladders made of insulating materials, the tops of the two groups of maintenance ladders are hinged together, the bottoms of the two groups of maintenance ladders are fixedly connected with square pipes, and the two port parts of the two groups of square pipes are provided with connecting plates; the outer sides of the four sets of connecting plates are rotationally connected with mounting blocks correspondingly, the top of each set of mounting blocks is in threaded connection with a hand-screwing bolt, and inner cavities of the two sets of square pipes are provided with pushing pieces which push the two sets of mounting blocks on the corresponding sides outwards at the same time so as to transversely support the overhaul ladder. The tops of the two sets of insulation maintenance ladders are hinged, the unfolding angle can be flexibly adjusted, the pushing pieces in the square pipes at the bottoms can synchronously push the installation blocks on the two sides to expand outwards through gear and rack mechanisms, the supporting span of the bottoms of the maintenance ladders is enlarged, and when lateral external force, wind power or equipment collision of operators acts on the maintenance ladders, the widened supporting structures effectively disperse stress.

Description

Technical Field

[0001] This utility model relates to the technical field of lightweight, high-strength, non-slip, and insulating composite material maintenance ladders, specifically a lightweight, high-strength, non-slip, and insulating composite material maintenance ladder. Background Technology

[0002] Electricity is an energy source that uses electrical energy as its power source. It is a power production and consumption system consisting of power generation, transmission, transformation, distribution, and consumption. It converts primary energy from nature into electricity through mechanical energy devices, and then supplies the electricity to various users through transmission, transformation, and distribution. Because electrical equipment is installed at high locations, maintenance ladders are needed for repairs.

[0003] Currently, Chinese Patent CN219316868U discloses a maintenance ladder for high-altitude electrical equipment maintenance, including an insulated maintenance ladder. The top of the insulated maintenance ladder is hinged to a second ladder rod. Both the first and second ladder rods have treads connected to their outer walls, and both the first and second ladder rods have wear-resistant support feet at their bottoms. The ladder also includes a first traction assembly and a second traction assembly, which are used for the pulling connection between the first and second ladder rods. The first traction assembly includes a first connecting screw, and the second traction assembly includes a second connecting screw, with one end of the second connecting screw threadedly connected to the first connecting screw. This invention uses a screw connection method to achieve adjustable connection length of the traction assembly, enabling support at different angles through different lengths of traction, thereby improving the flexibility of the maintenance ladder.

[0004] The aforementioned maintenance ladders for high-altitude electrical equipment maintenance still have some problems in use. Although they can achieve support at different angles by pulling and stretching at different lengths, if the operator applies force to the side when using the maintenance ladder, such as reaching out to grab equipment or adjusting posture, or if the ladder is affected by external forces such as wind or equipment collision, the lack of lateral support will cause the center of gravity of the ladder to shift, which may result in personnel falling or equipment damage. Utility Model Content

[0005] The purpose of this invention is to provide a lightweight, high-strength, non-slip, and insulating composite material maintenance ladder to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A lightweight, high-strength, non-slip, and insulating composite material maintenance ladder includes two sets of maintenance ladders made of insulating material. The tops of the two sets of maintenance ladders are hinged together, and the bottoms of the two sets of maintenance ladders are fixedly connected to square tubes. Connecting plates are provided at both ends of the square tubes. Mounting blocks are rotatably connected to the outer sides of the four sets of connecting plates. A hand-tightening bolt is threaded to the top of each set of mounting blocks. The end of each set of hand-tightening bolts is threaded downward through the mounting block and fixedly connected to a suction cup. The inner cavities of the two sets of square tubes are provided with pushing components that simultaneously push the corresponding two sets of mounting blocks outward to provide lateral support for the maintenance ladder.

[0008] The pushing component includes a rotating rod rotatably connected to the inner cavity of the middle of each set of square tubes. A gear is fixedly sleeved on the surface of each set of rotating rods. A rack is respectively meshed on the front and rear sides of each set of gears along the length of the square tube. The opposite ends of the two sets of racks on the same side are respectively fixedly connected to the ends of the corresponding side connecting plates. The top of the rotating rod rotatably passes through the square tube and is fixedly connected to a handwheel. A fixing component for fixing the rotating rod is provided at the top of the square tube and at the corresponding position of the neck of the rotating rod.

[0009] As a preferred technical solution, the fastener includes a fixing ring fixedly connected to the top of the square tube and located at the neck of the rotating rod. The surface of the fixing ring is threaded with a fixing bolt, and the end of the fixing bolt is threaded through the fixing ring and abuts against the neck of the rotating rod.

[0010] As a preferred technical solution, each set of square tubes has a guide bar fixedly connected to the inner walls on both sides and at the center of the back of the corresponding side rack. Each set of racks has a guide groove on the back for the guide bar to slide. The ends of each set of guide bars are slidably connected to the inner cavity of the corresponding side guide groove.

[0011] As a preferred technical solution, the top of the hand-tightening bolt is provided with a through hole for connecting to the inner cavity of the suction cup. The through hole is used to discharge air from the inner cavity when the suction cup is adsorbing. A sealing element is provided at the upper opening of the through hole for sealing the inside of the through hole.

[0012] As a preferred technical solution, the sealing element includes a fixing strip fixedly connected to the inner wall above the through hole. A connecting rod is inserted into the surface of the fixing strip. A sealing disc for sealing the opening of the through hole is fixedly connected to the end of the connecting rod. A pull rod is fixedly connected to the top of the sealing disc. The lower end of the connecting rod slides downward through the fixing strip and connects to a limiting disc. A spring is sleeved on the surface of the connecting rod located between the limiting disc and the fixing strip. The two ends of the spring contact the bottom of the fixing strip and the top of the limiting disc, respectively. When the hand-tightening bolt is tightened downward to make the suction cup fit against the support surface, the spring is in its natural state. The sealing disc seals the through hole under the action of the spring force to achieve the sealing of the suction cup cavity. When it is necessary to release the suction, the pull rod is pulled upward to drive the sealing disc away from the opening of the through hole. External air enters the suction cup cavity through the through hole, releasing the negative pressure suction state.

[0013] As a preferred technical solution, each set of connecting plates has an adapter rod rotatably inserted into its surface, and the ends of each set of adapter rods are fixedly connected to the surface of the corresponding side mounting block. The cross-section of the adapter rod is T-shaped.

[0014] As a preferred technical solution, wedge blocks are fixedly connected to one end of each of the two sets of square tubes, and rubber pads are fixedly connected to the inclined surface of each set of wedge blocks and the bottom of the square tubes.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model, through the setting of the pushing component, allows the top hinge of the two sets of insulated maintenance ladders to flexibly adjust the unfolding angle. The pushing component inside the square tube at the bottom can simultaneously push the mounting blocks on both sides outward through the gear and rack mechanism, expanding the bottom support span of the maintenance ladder. When the maintenance ladder is subjected to lateral external force, wind force, or equipment collision, the widened support structure effectively disperses the force, reduces the risk of center of gravity shift, greatly enhances lateral stability, and avoids personnel falling or equipment damage due to lateral instability. At the same time, the hand-tightened bolts cooperate with the suction cups to make the maintenance ladder firmly adhere to the ground, further enhancing the bottom grip. When subjected to lateral force, the suction force can offset part of the external force, prevent the maintenance ladder from shifting sideways, and provide a stable foundation for lateral support.

[0017] 2. By setting up a fixing component, after the pushing component adjusts the position of the mounting block and expands the support span, the rotating rod is firmly locked. Even if the maintenance ladder is continuously subjected to lateral external force, the rotating rod can be prevented from rotating unexpectedly, ensuring a constant support span, maintaining a stable lateral support effect, and ensuring safe use.

[0018] 3. This utility model automatically seals and opens the through hole by setting a sealing element and cooperating with the spring and sealing plate. When sealing, it ensures the stable adsorption force of the suction cup, maintains a firm connection between the maintenance ladder and the ground, provides reliable grip when subjected to lateral force, and is easy to operate when releasing the adsorption, making it convenient to move and adjust the position of the maintenance ladder. At the same time, it ensures that the adsorption function is always available and continuously provides a guarantee for lateral stability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the lightweight, high-strength, non-slip, and insulating composite material maintenance ladder of this utility model;

[0020] Figure 2 This is a schematic diagram of the square tube structure of this utility model;

[0021] Figure 3 This is a cross-sectional view of the square tube of this utility model;

[0022] Figure 4 This is a cross-sectional view of the mounting block of this utility model;

[0023] Figure 5 This is a cross-sectional structural diagram of the hand-tightening bolt of this utility model.

[0024] In the picture:

[0025] 100. Maintenance ladder; 101. Square tube; 102. Rubber pad; 103. Wedge block;

[0026] 200. Rack; 201. Connecting plate; 202. Guide groove; 203. Guide bar; 204. Handwheel; 205. Rotating rod; 206. Retaining ring; 207. Fixing bolt; 208. Gear;

[0027] 300. Mounting block; 301. Suction cup; 302. Hand-tightening bolt; 303. Adapter rod;

[0028] 400. Sealing disc; 401. Pull rod; 402. Fixing strip; 403. Connecting rod; 404. Spring; 405. Limiting disc; 406. Through hole. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-5This embodiment provides a lightweight, high-strength, non-slip, and insulating composite material maintenance ladder, including two sets of maintenance ladders 100 made of insulating material. The tops of the two sets of maintenance ladders 100 are hinged together, and the bottoms of the two sets of maintenance ladders 100 are fixedly connected to square tubes 101. Both ends of the two sets of square tubes 101 are provided with connecting plates 201. The outer sides of the four sets of connecting plates 201 are rotatably connected to mounting blocks 300. The top of each set of mounting blocks 300 is threaded with a hand-tightening bolt 302. The end of each set of hand-tightening bolts 302 is threaded downward through the mounting block 300 and fixedly connected to a suction cup 301. The inner cavities of the two sets of square tubes 101 are provided with pushers that simultaneously push the corresponding two sets of mounting blocks 300 outward to provide lateral support for the maintenance ladder 100.

[0031] The pushing component includes a rotating rod 205 rotatably connected to the inner cavity of each set of square tubes 101. A gear 208 is fixedly sleeved on the surface of each rotating rod 205. Racks 200, arranged along the length of the square tube 101, mesh with the front and rear sides of each gear 208. The opposing ends of two racks 200 on the same side are fixedly connected to the ends of corresponding connecting plates 201. A handwheel 204 is fixedly connected to the top of the rotating rod 205, which rotatably passes through the square tube 101. A fixing component for securing the rotating rod 205 is located at the top of the square tube 101 and at a corresponding position on the neck of the rotating rod 205. Through the installation of the pushing component, the tops of the two sets of insulated maintenance ladders 100 can be flexibly hinged. By adjusting the unfolding angle, the pusher inside the bottom square tube 101, through the gear 208 and rack 200 mechanism, can simultaneously push the mounting blocks 300 on both sides to expand outward, increasing the bottom support span of the maintenance ladder 100. When lateral external forces, wind forces, or equipment collisions act on the maintenance ladder 100, the widened support structure effectively disperses the force, reduces the risk of center of gravity shift, greatly enhances lateral stability, and avoids personnel falling or equipment damage due to lateral instability. At the same time, the hand-tightened bolt 302 cooperates with the suction cup 301 to make the maintenance ladder 100 firmly adhere to the ground, further enhancing the bottom grip. When subjected to lateral force, the suction force can offset part of the external force, preventing the maintenance ladder 100 from shifting laterally as a whole, and providing a stable foundation for lateral support.

[0032] The insulating material is composed of one or more of the following: glass fiber, polyvinyl chloride, silicone rubber, and glass fiber reinforced resin.

[0033] The fastener includes a fixing ring 206 fixedly connected to the top of the square tube 101 and located at the neck of the rotating rod 205. The surface of the fixing ring 206 is threaded with a fixing bolt 207. The end of the fixing bolt 207 is threaded through the fixing ring 206 and abuts against the neck of the rotating rod 205. With the fastener, after the pusher adjusts the position of the mounting block 300 and expands the support span, the rotating rod 205 is firmly locked. Even if the maintenance ladder 100 is continuously subjected to lateral external force, the rotating rod 205 can be prevented from rotating unexpectedly, ensuring a constant support span, maintaining a stable lateral support effect, and ensuring safe use.

[0034] Each set of square tubes 101 has guide bars 203 fixedly connected to the inner walls of both sides and at the center of the back of the corresponding rack 200. Each set of racks 200 has a guide groove 202 for the guide bars 203 to slide on its back. The ends of each set of guide bars 203 are slidably connected to the inner cavity of the corresponding guide groove 202. The guide bars 203 and guide grooves 202 provide precise guidance for the linear movement of the rack 200, preventing the rack 200 from shifting or shaking during the lateral support adjustment. Even when subjected to lateral force, the mounting blocks 300 on both sides can expand synchronously and stably, so that the lateral support structure is evenly stressed, maintaining the balance of the maintenance ladder 100 and preventing the center of gravity from shifting due to the inaccuracy of component movement.

[0035] The top of the hand-tightening bolt 302 is provided with a through hole 406 for connecting to the inner cavity of the suction cup 301. The through hole 406 is used to expel air from the inner cavity when the suction cup 301 is adsorbing. A sealing element is provided at the upper opening of the through hole 406 to seal the inside of the through hole 406. By opening the through hole 406, it is ensured that the air in the cavity is smoothly discharged when the suction cup 301 is in contact with the ground, so that the suction cup 301 generates a strong adsorption force. Under the action of lateral external force, the adsorption force can work together with the lateral support structure to resist the external force, prevent the maintenance ladder 100 from tilting or slipping, and enhance the overall stability.

[0036] The sealing element includes a fixing strip 402 fixedly connected to the inner wall above the through hole 406. A connecting rod 403 is inserted into the surface of the fixing strip 402. A sealing disc 400 for sealing the opening of the through hole 406 is fixedly connected to the end of the connecting rod 403. A pull rod 401 is fixedly connected to the top of the sealing disc 400. The lower end of the connecting rod 403 slides downward through the fixing strip 402 and connects to a limiting disc 405. A spring 404 is sleeved on the surface of the connecting rod 403 located between the limiting disc 405 and the fixing strip 402. The two ends of the spring 404 contact the bottom of the fixing strip 402 and the top of the limiting disc 405, respectively. When the hand-tightened bolt 302 is tightened downward to make the suction cup 301 fit against the support surface, the spring 404 is in a natural state. In the suction cup 301 state, the sealing disc 400, under the elastic force of the spring 404, seals the through hole 406 to achieve a seal within the suction cup 301. When it is necessary to release the suction, the pull rod 401 is pulled upward to cause the sealing disc 400 to disengage from the opening of the through hole 406. External air enters the suction cup 301 through the through hole 406, releasing the negative pressure suction state. Through the setting of the sealing element, the cooperation between the spring 404 and the sealing disc 400 automatically achieves the sealing and opening of the through hole 406. When sealing, it ensures the stability of the suction force of the suction cup 301, maintains the firm connection between the maintenance ladder 100 and the ground, and provides reliable grip when subjected to lateral force. When releasing the suction, the operation is convenient, facilitating the relocation and adjustment of the maintenance ladder 100, while ensuring that the suction function is always available and continuously providing a guarantee for lateral stability.

[0037] Each set of connecting plates 201 has a rotatable adapter rod 303 inserted into its surface. The end of each set of adapter rods 303 is fixedly connected to the surface of the corresponding mounting block 300. The cross-section of the adapter rod 303 is T-shaped. Through the setting of the adapter rod 303, the T-shaped adapter rod 303 allows the mounting block 300 to rotate flexibly. Even if the support surface is uneven, the suction cup 301 can adapt and fit, ensuring that the suction cup 301 can fully exert its adsorption function when subjected to lateral force, avoiding adsorption failure due to poor contact, and enhancing the lateral stability of the maintenance ladder 100 in complex ground environments.

[0038] Among them, wedge blocks 103 are fixedly connected to one end of each of the two sets of square tubes 101. Rubber pads 102 are fixedly connected to the inclined surface of each set of wedge blocks 103 and the bottom of the square tubes 101. By setting the wedge blocks 103, the wedge blocks 103 increase the contact points between the maintenance ladder 100 and the support surface. The rubber pads 102 increase the friction and provide buffering. When subjected to lateral force, the multi-point contact and high friction can disperse the external force. The rubber pads 102 buffer vibration and prevent the maintenance ladder 100 from sliding or tilting due to uneven force, thereby further improving the overall lateral stability and safety of use.

[0039] Working principle;

[0040] First, two sets of maintenance ladders 100 made of insulating material are connected at the top by a hinge to form an A-frame structure. When in use, the maintenance ladder 100 is unfolded to a suitable angle. At this time, the square tube 101 at the bottom will be in a horizontal state as the maintenance ladder 100 is unfolded, and the inclined surfaces of the two sets of wedge blocks 103 will contact the support surface respectively.

[0041] The operator rotates the handwheel 204 at the top of the square tube 101. The handwheel 204 drives the rotating rod 205 to rotate, and the gear 208 fixed on the rotating rod 205 will also rotate. The gear 208 meshes with the rack 200 set along the length of the square tube 101. The rotation of the gear 208 will drive the rack 200 to move in a straight line. The two sets of racks 200 on the same side will push the connecting plate 201 on the corresponding side outward at the same time. The connecting plate 201 then drives the mounting block 300 to move outward through the adapter rod 303, thereby expanding the support span at the bottom of the maintenance ladder 100 and enhancing the lateral stability of the maintenance ladder 100.

[0042] After the mounting block 300 is moved to the appropriate position, the operator tightens the fixing bolt 207 on the surface of the fixing ring 206 so that the end of the fixing bolt 207 abuts against the neck of the rotating rod 205, thereby fixing the rotating rod 205 and preventing it from rotating during use, ensuring that the positions of the rack 200 and the mounting block 300 remain stable.

[0043] Subsequently, the mounting block 300 is rotated so that the suction cup 301 at the bottom of the mounting block 300 faces the support surface. The operator then manually rotates the hand-tightening bolt 302, causing the hand-tightening bolt 302 to move downward. As the hand-tightening bolt 302 moves downward, the suction cup 301, which is fixedly connected to the end of the hand-tightening bolt 302, gradually contacts and adheres to the support surface. As the hand-tightening bolt 302 continues to tighten, the air inside the suction cup 301 is discharged through the through hole 406 at the top of the hand-tightening bolt 302. When the suction cup 301 is completely adhered to the support surface, the spring 404 is in its natural state. Under the action of the spring 404, the sealing plate 400 seals the through hole 406, thereby sealing the inner cavity of the suction cup 301. This allows the suction cup 301 to generate suction force, firmly fixing the maintenance ladder 100 to the support surface.

[0044] When the maintenance ladder 100 needs to be moved, the operator pulls the top of the sealing plate 400 upwards on the pull rod 401. The pull rod 401 causes the sealing plate 400 to disengage from the opening of the through hole 406. At this time, external air enters the inner cavity of the suction cup 301 through the through hole 406, the negative pressure state inside the suction cup 301 is released, the suction force disappears, and the operator can easily move the maintenance ladder 100.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lightweight, high-strength, non-slip, and insulating composite material maintenance ladder, characterized in that, The system includes two sets of maintenance ladders (100) made of insulating material. The tops of the two sets of maintenance ladders (100) are hinged together. The bottoms of the two sets of maintenance ladders (100) are fixedly connected to square tubes (101). Both ends of the two sets of square tubes (101) are provided with connecting plates (201). The outer sides of the four sets of connecting plates (201) are respectively rotatably connected to mounting blocks (300). The top of each set of mounting blocks (300) is threaded with a hand-tightening bolt (302). The end of each set of hand-tightening bolts (302) is threaded downward through the mounting block (300) and fixedly connected with a suction cup (301). The inner cavity of the two sets of square tubes (101) is provided with a pushing member that simultaneously pushes the two sets of mounting blocks (300) on the corresponding side outward to provide lateral support for the maintenance ladder (100). The pushing component includes a rotating rod (205) rotatably connected to the inner cavity of the middle of each set of square tubes (101). A gear (208) is fixedly sleeved on the surface of each set of rotating rods (205). A rack (200) is respectively meshed on the front and rear sides of each set of gears (208) along the length of the square tube (101). The two sets of racks (200) on the same side are respectively fixedly connected to the end of the corresponding side connecting plate (201). The top of the rotating rod (205) rotatably passes through the square tube (101) and is fixedly connected to a handwheel (204). A fixing member for fixing the rotating rod (205) is provided at the top of the square tube (101) and at the corresponding position of the neck of the rotating rod (205).

2. The lightweight, high-strength, non-slip, and insulating composite material maintenance ladder according to claim 1, characterized in that: The fastener includes a fixing ring (206) fixedly connected to the top of the square tube (101) and located at the neck of the rotating rod (205). The surface of the fixing ring (206) is threaded with a fixing bolt (207). The end of the fixing bolt (207) is threaded through the fixing ring (206) and abuts against the neck of the rotating rod (205).

3. The lightweight, high-strength, non-slip, and insulating composite material maintenance ladder according to claim 2, characterized in that: Each set of square tubes (101) has a guide bar (203) fixedly connected to the inner walls on both sides and at the center of the back of the corresponding side rack (200). Each set of racks (200) has a guide groove (202) on the back for the guide bar (203) to slide. The ends of each set of guide bars (203) are slidably connected to the inner cavity of the corresponding side guide groove (202).

4. The lightweight, high-strength, non-slip, and insulating composite material maintenance ladder according to claim 1, characterized in that: The top of the hand-tightening bolt (302) is provided with a through hole (406) for connecting to the inner cavity of the suction cup (301). The through hole (406) is used to discharge air from the inner cavity when the suction cup (301) adsorbs. A sealing element is provided at the upper opening of the through hole (406) for sealing the inside of the through hole (406).

5. The lightweight, high-strength, anti-slip, and insulating composite material maintenance ladder according to claim 4, characterized in that: The sealing element includes a fixing strip (402) fixedly connected to the inner wall above the through hole (406). A connecting rod (403) is inserted into the surface of the fixing strip (402). A sealing disc (400) for sealing the opening of the through hole (406) is fixedly connected to the end of the connecting rod (403). A pull rod (401) is fixedly connected to the top of the sealing disc (400). The lower end of the connecting rod (403) slides downward through the fixing strip (402) and is connected to a limiting disc (405). A spring (401) is sleeved on the surface of the connecting rod (403) located between the limiting disc (405) and the fixing strip (402). 4) The two ends of the spring (404) respectively contact the bottom of the fixing strip (402) and the top of the limiting plate (405). When the hand-tightening bolt (302) is tightened downwards to make the suction cup (301) fit against the support surface, the spring (404) is in a natural state. The sealing plate (400) seals the through hole (406) under the elastic force of the spring (404) to achieve the sealing of the inner cavity of the suction cup (301). When it is necessary to release the adsorption, the pull rod (401) is pulled upwards to drive the sealing plate (400) to leave the opening of the through hole (406). External air enters the inner cavity of the suction cup (301) through the through hole (406) to release the negative pressure adsorption state.

6. The lightweight, high-strength, non-slip, and insulating composite material maintenance ladder according to claim 1, characterized in that: Each set of connecting plates (201) has a rotatable adapter rod (303) inserted into its surface. The ends of each set of adapter rods (303) are fixedly connected to the surface of the corresponding side mounting block (300). The cross-section of the adapter rod (303) is T-shaped.

7. A lightweight, high-strength, non-slip, and insulating composite material maintenance ladder according to any one of claims 1-6, characterized in that: Both sets of square tubes (101) are fixedly connected to one end of a wedge block (103), and the inclined surface of each set of wedge blocks (103) is fixedly connected to the bottom of the square tube (101) with a rubber pad (102).

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