A wall connecting device of a bridge pier safety ladder

Abstract

The utility model discloses a kind of wall connecting devices of bridge pier column safety ladder stand, belong to bridge construction technical field, mainly used for the safety ladder stand installation of bridge pier column.The technical problem to be solved by the utility model is to provide a kind of wall connecting devices of bridge pier column safety ladder stand, including wall connecting locking mechanism and the ladder stand reinforcing fixed mechanism of the U-shaped structure of the open towards wall connecting locking mechanism;Wall connecting locking mechanism includes the first big arm and the second big arm of parallel arrangement, ladder stand reinforcing fixed mechanism is bolted with wall connecting locking mechanism;Two parallelly arranged first arm frames are bolted on the first big arm, two parallelly arranged second arm frames are bolted on the second big arm, first, second arm frame is bolted by the butt joint of the U-shaped bolt of open downward;Adjacent first, second arm frame enclose with first, second big arm to form square cavity for bridge pier column to pass through;To improve the installation efficiency of wall connecting device, reusable and guarantee safe construction.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and in particular to a wall-connecting device for a safety ladder for bridge piers. Background Technology

[0002] In the construction of substructures for highways and municipal bridges, safety ladders are often used to ensure the safety of workers accessing the construction platform. However, since the ladders are designed and installed separately from the bridge piers, a wall-connecting device is required to attach the safety ladders to the piers. There are two existing methods for attaching safety ladders to the wall: The first method involves embedding steel plates in the side of the pier before concrete pouring, and then welding the ladder wall-connecting members to the embedded steel plates after demolding to fix the safety ladder. The second method involves using pre-drilled tie rod holes in the pier formwork, and then connecting and fixing the safety ladder to the tie rods after demolding.

[0003] However, in the first method of using pre-embedded steel plates for wall ties, the pre-embedded steel plates inside the pier cannot be removed or reused, resulting in material waste. Furthermore, the pre-embedded steel plates are exposed on the pier body, requiring exterior finishing work, which is difficult, time-consuming, and labor-intensive. Inadequate finishing can lead to rust, affecting the appearance of the pier column and, in severe cases, corroding the pier's reinforcing steel, causing structural instability and significant safety hazards. In the second method, using tie rods for wall ties, the safety of operators is greatly endangered during installation and removal, especially those working behind the pier, whose safety cannot be guaranteed and are highly susceptible to accidents. Deviations in the diameter of the tie rod holes between the tie rods and the pier can create gaps, causing the tie rods to wobble when connected to the ladder, preventing the pier from being locked securely and resulting in instability. The tie rod holes also present difficulties in finishing. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a wall-connecting device for a safety ladder for bridge piers, which is mainly used for the installation of safety ladders for bridge piers, so as to improve the installation efficiency of the wall-connecting device, make it reusable, and reduce the installation risk factor.

[0005] This utility model discloses a wall-connecting device for a safety ladder on a bridge pier, comprising a wall-connecting locking mechanism and a ladder reinforcement and fixing mechanism for installing the safety ladder; the wall-connecting locking mechanism includes a first main arm and a second main arm arranged in parallel, and the ladder reinforcement and fixing mechanism has a U-shaped structure with its opening facing the wall-connecting locking mechanism, and the ladder reinforcement and fixing mechanism is bolted to the wall-connecting locking mechanism; the first main arm is provided with two first booms arranged in parallel and facing the second main arm, the first booms including a first connecting part and a first extension section connected in sequence, the first connecting part being bolted to the first main arm; the second main arm is provided with two... A second boom is arranged parallel to and facing the first boom. The second boom includes a second connecting part and a second extension section connected in sequence. The second connecting part is bolted to the second boom. The end of the first extension section is inserted into the second extension section. The second extension section is provided with a butt fixing bolt for connecting the second extension section and the first extension section. The butt fixing bolt is a U-shaped bolt with the opening facing downward. The two parallel vertical bars of the butt fixing bolt pass through the second extension section and the first extension section in sequence. The adjacent first boom and second boom, together with the first boom and the second boom, form a square cavity for the bridge pier to pass through.

[0006] Furthermore, each of the second booms has a docking box at the top of the end where it connects to the first boom. The docking box contains a limiting cylinder for moving the docking fixing bolt. The limiting cylinder includes two vertical limiting sections that pass through the docking box for moving the vertical rod of the docking fixing bolt, and a horizontal limiting section that is located above the vertical limiting sections and connected to the two vertical limiting sections for moving the horizontal rod of the docking fixing bolt. The length of the vertical limiting section is greater than the length of the docking fixing bolt. A pull rope that passes through the docking box is connected to the horizontal rod of the docking fixing bolt. The pull rope drives the docking fixing bolt to move up and down inside the limiting cylinder.

[0007] As a preferred embodiment, each docking box is provided with a return spring corresponding to the vertical rod of the docking fixing bolt. One end of the return spring is connected to the top of the docking box, and the other end is connected to the docking fixing bolt.

[0008] As a preferred embodiment, the top of the docking box is provided with a guide pulley located above the center of the crossbar of the docking fixing bolt, and the pull rope is wound around the guide pulley and connected to the crossbar of the docking fixing bolt.

[0009] As a preferred embodiment, the second boom and the second large boom are provided with guide rings for the pull rope to pass through, and the guide rings are located at the bends where the pull rope is laid.

[0010] As a preferred embodiment, the guide ring is also positioned in a straight line along the location where the pull rope is laid.

[0011] Furthermore, the first boom has a first horizontal bolt hole group and a first vertical bolt hole group evenly distributed along the length of the first boom. The first horizontal bolt group and the first vertical bolt group are staggered on the first boom. Both the first horizontal bolt group and the first vertical bolt hole group include two bolt holes. The second boom has a second horizontal bolt hole group and a second vertical bolt hole group distributed along the length of the second boom. The second horizontal bolt group and the second vertical bolt group are staggered on the second boom. Both the second horizontal bolt group and the second vertical bolt hole group include two bolt holes.

[0012] The end of the first connecting part is provided with a first slot that is adapted to the first large arm. The first slot is provided with a first bolt hole group that corresponds to the first horizontal bolt hole group. The first slot is also provided with a first bolt that passes through the first bolt hole group and the first horizontal bolt hole group in sequence.

[0013] The end of the second connecting part is provided with a second slot that is adapted to the second arm. The second slot is provided with a second bolt hole group that corresponds to the second horizontal bolt hole group. The second slot is also provided with a second bolt that passes through the second bolt hole group and the second horizontal bolt hole group in sequence.

[0014] As a preferred embodiment, the ladder reinforcement and fixing mechanism is made of an integrally formed L-shaped steel; the horizontal section of the ladder reinforcement and fixing mechanism has a third horizontal bolt hole group corresponding to the first horizontal bolt hole group and the second horizontal bolt hole group; the vertical section of the ladder reinforcement and fixing mechanism has a third vertical bolt hole group corresponding to the first vertical bolt hole group and the second vertical bolt hole group; the ladder reinforcement and fixing mechanism is also provided with a third bolt that passes through the first horizontal bolt hole group, the third horizontal bolt hole group, and the second horizontal bolt hole group in sequence; the ladder reinforcement and fixing mechanism is also provided with a fourth bolt that passes through the first vertical bolt hole group, the third vertical bolt hole group, and the second vertical bolt hole group in sequence.

[0015] The beneficial effects of this utility model are as follows: the ladder strengthening and fixing mechanism and the wall-connecting locking mechanism are connected by bolts, which facilitates disassembly and assembly, effectively improves installation efficiency and turnover rate, and reduces the risk factor of installing the wall-connecting device. The first boom and the first boom, the second boom and the second boom, and the first boom and the second boom are all connected by bolts. The spacing between adjacent first booms and adjacent second booms can be adjusted according to the diameter of the pier to be installed, thereby adjusting the size of the square cavity to adapt to the installation of piers of different sizes. Moreover, the bolted connection between the first boom and the first boom, and between the second boom and the second boom is easy to disassemble and reuse, saving material costs. Furthermore, the wall-connecting locking mechanism is an open-type structure, which eliminates the need for pre-embedded steel plates on the pier body for wall attachment, effectively solving the problem of pre-embedded steel plates inside the pier body being unable to be removed, thus avoiding material waste. Attached Figure Description

[0016] Figure 1 : A schematic diagram of the structure of this utility model;

[0017] Figure 2 : A schematic diagram of the installation of this utility model in conjunction with bridge piers;

[0018] Figure 3 : Schematic diagram of the boom structure of this utility model;

[0019] Figure 4 : Schematic diagram of the docking box of this utility model;

[0020] Figure 5 This utility model Figure 4 Internal diagram of the junction box;

[0021] Figure 6 : Schematic diagram of the fixing bolts;

[0022] Figure 7 Schematic diagram of the limiting cylinder;

[0023] Figure 8 : Schematic diagram of the rope arrangement of this utility model.

[0024] Reference numerals: 1-Bridge pier; 2-Safety ladder; 3-Wall ties locking mechanism; 31-First boom; 311-First boom; 313-First connecting part; 3131-First slot; 3132-First bolt hole group; 3133-First bolt; 314-First extension section; 3141-First butt bolt hole; 315-First horizontal bolt hole group; 316-First vertical bolt hole group; 32-Second boom; 321-Second boom; 323-Second connecting part; 3231-Second slot; 3232-Second bolt hole group; 3233-Second bolt; 324-Second extension section; 3241-Second butt bolt hole; 3 25-Fitting fixing bolt; 3251-Vertical rod; 3252-Horizontal rod; 326-Second horizontal bolt hole group; 327-Second vertical bolt hole group; 33-Square cavity; 34-Fitting box; 341-Limiting cylinder; 3411-Vertical limiting section; 3412-Horizontal limiting section; 342-Reset spring; 343-Guide pulley; 3431-Bracket; 3432-Fixed pulley; 35-Pull rope; 351-Guide ring; 4-Ladder reinforcement fixing mechanism; 41-Support arm; 42-Horizontal section; 421-Third horizontal bolt hole group; 43-Vertical section; 431-Third vertical bolt group; 44-Third bolt; 45-Fourth bolt. Detailed Implementation

[0025] The present invention will be further described below.

[0026] This utility model provides a wall-connecting device for a safety ladder for bridge piers, mainly used for the installation of safety ladders on bridge piers. It includes a wall-connecting locking mechanism 3 and a ladder reinforcement and fixing mechanism 4 for installing the safety ladder. The wall-connecting locking mechanism 3 includes a first main arm 31 and a second main arm 32 arranged in parallel. The ladder reinforcement and fixing mechanism 4 has a U-shaped structure with its opening facing the wall-connecting locking mechanism 3, and is bolted to the wall-connecting locking mechanism 3. The first main arm 31 has two parallel first booms 311 facing the second main arm 32. Each first boom 311 includes a first connecting part 313 and a first extension section 314 connected in sequence, and the first connecting part 313 is bolted to the first main arm 31. The second main arm 32 has two parallel first booms 311 facing the second main arm 32. The second boom 321 of the first boom 31 includes a second connecting part 323 and a second extension section 324 connected in sequence. The second connecting part 323 is bolted to the second boom 32. The end of the first extension section 314 is inserted into the second extension section 324. The second extension section 324 is provided with a butt fixing bolt 325 for connecting the second extension section 324 and the first extension section 314. The butt fixing bolt 325 is a U-shaped bolt with the opening facing downward. The two parallel vertical rods 3251 of the butt fixing bolt 325 pass through the second extension section 324 and the first extension section 314 in sequence. The adjacent first boom 311, second boom 321 together with the first boom 31 and second boom 32 form a square cavity 33 for the passage of bridge piers.

[0027] like Figure 1As shown, the wall-connecting device for the safety ladder on the bridge pier includes a wall-connecting locking mechanism 3 and a ladder reinforcement and fixing mechanism 4 for installing the safety ladder. Specifically, the wall-connecting locking mechanism 3 forms a square cavity 33 for enclosing the pier by means of the first boom 31 and the second boom 32, which cooperate with the first boom 311 and the second boom 321. The first boom 311 and the second boom 321 are locked together using butt-fitting fixing bolts 325, thereby setting the wall-connecting locking mechanism 3 on the pier. To facilitate the operator to quickly complete the bolt connection of the first boom 311 and the second boom 321, the butt-fitting fixing bolt 325 is a U-shaped bolt with the opening facing downwards. The U-shaped bolt is directly inserted from top to bottom into the first extension... Bolt holes are provided on section 314 and the second extension section 324, and then nuts are used for locking and fixing. Simultaneously, bolts are used to connect the first boom 31 to the first boom 311 and the second boom 32 to the second boom 321. Therefore, the spacing between adjacent first booms 311 and adjacent second booms 321 can be adjusted according to the diameter of the pier to be installed, thereby adjusting the size of the square cavity 33 to accommodate piers of different sizes. Furthermore, the bolted connections between the first boom 311 and the first boom 31, and between the second boom 321 and the second boom 321, facilitate disassembly and reuse, saving material costs. Additionally, the wall-connecting locking mechanism 3 is an open-loop type structure, eliminating the need for… The use of pre-embedded steel plates for wall ties on the pier body effectively solves the problem of pre-embedded steel plates being unable to be removed from the pier body, resulting in material waste. Furthermore, improper finishing of the pre-embedded steel plates can easily lead to corrosion, affecting the appearance quality of the pier column and, in severe cases, corroding the pier reinforcement, causing structural instability in the bridge. After the wall ties locking mechanism 3 is installed, the ladder reinforcement fixing mechanism 4 is bolted to the wall ties locking mechanism 3 mounted on the pier column. The safety ladder is then installed on the ladder reinforcement fixing mechanism 4, allowing the ladder reinforcement fixing mechanism 4 to be installed on the pier column without damaging the pier column or pre-embedded connectors within it. The ladder reinforcement fixing mechanism 4 is an integrally formed U-shaped structure with its opening facing the wall ties locking mechanism 3. The structure connects the two parallel arms 41 of the ladder reinforcement and fixing mechanism 4 to the first arm 31 and the second arm 32 of the wall-connecting locking mechanism 3 with bolts. By controlling the connection length between the arms 41 and the first arm 31 and the second arm 32, the connection stability between the ladder reinforcement and fixing mechanism 4 and the wall-connecting locking mechanism 3 is ensured. The more bolts used to connect the ladder reinforcement and fixing mechanism 4 and the wall-connecting locking mechanism 3, the better the connection strength, thus ensuring the connection stability of the safety ladder connected to the ladder reinforcement and fixing mechanism 4. Furthermore, the bolted connection between the ladder reinforcement and fixing mechanism 4 and the wall-connecting locking mechanism 3 facilitates disassembly and assembly, effectively improving installation efficiency and turnover rate, and reducing the risk factor of installing the wall-connecting device.

[0028] Furthermore, to address the issue of operational safety during the installation and dismantling of the wall ties for the safety ladders on the bridge piers, where operators face challenges in ensuring safety when installing the connecting boom 311 and the second boom 321 on the back of the pier, such as... Figures 1-6 As shown, the top of the second extension section 324 is provided with a docking box 34. The docking box 34 contains a limiting cylinder 341 for moving the docking fixing bolt 325. The limiting cylinder 341 includes two vertical limiting sections 3411 that penetrate the docking box 34 and are used for moving the vertical rod 3251 of the docking fixing bolt 325; and a horizontal limiting section 3412 that is located above the vertical limiting sections 3411 and connected to the two vertical limiting sections 3411, and is used for moving the horizontal rod 3252 of the docking fixing bolt 325. The length of segment 3411 is greater than the length of the mating bolt 325. A pull rope 35 passing through the mating box 34 is connected to the crossbar 3252 of the mating bolt 325. The pull rope 35 drives the mating bolt 325 to move up and down within the limiting cylinder 341. By setting the mating box 34 at the top of the second extension segment 324, and providing a limiting cylinder 341 for the up and down movement of the mating bolt 325 within the mating box 34, the limiting cylinder 341 is designed to accommodate the U-shaped mating bolt 325 with its opening facing downwards. It includes two vertical limiting sections 3411 for moving the vertical rod 3251 of the docking fixing bolt 325, and a horizontal limiting section 3412 for moving the horizontal rod 3252 of the docking fixing bolt 325. By opening a limiting sleeve 341 adapted to the docking fixing bolt 325, the docking fixing bolt 325 is restricted to always being aligned with the bolt holes for connecting the first boom 311 and the second boom 321 opened on the second extension section 324 and the first extension section 314. Then, the pull rope 35 connected to the horizontal rod 3252 of the docking fixing bolt 325 is used to drive the bolt. The fixing bolt 325 moves up and down along the limiting cylinder 341 within the docking box 34, thereby connecting the first boom 311 and the second boom 321 using the fixing bolt 325. By setting up the docking box 34, the limiting cylinder 341 opened in the docking box 34, and the pull rope 35, which is connected to the fixing bolt 325 in the docking box 34, the docking can be quickly fixed without personnel working at heights away from the docking box 34. This effectively solves the problem of safety concerns for operators working on the back of the pier during installation and dismantling.

[0029] To ensure the installation stability of the fixing bolts 325 and prevent them from falling off from the first extension section 314 and the second extension section 324 due to environmental factors, such as... Figure 4 , Figure 5As shown, each docking box 34 is equipped with a return spring 342 corresponding to the vertical rod 3251 of the docking fixing bolt 325. One end of the return spring 342 is connected to the top of the docking box 34, and the other end is connected to the docking fixing bolt 325. By setting the return spring 342 on the top of the docking fixing bolt 325, when the pull rope 35 moves the docking fixing bolt 325 upward, the return spring 342 is compressed, so that the docking fixing bolt 325 is located inside the docking box 34, so that the first extension section 314 can extend into the second extension section 324. Then, the pull rope 35 is lowered, and the return spring 342 returns to its original position using its self-recovery characteristic. 2. The clamping and fixing bolts 325 are pressed together so that they pass through the second bolt hole on the second extension section 324 and the first bolt hole on the first extension section 314 in sequence. At the same time, the clamping and fixing bolts 325 are pressed downward to prevent them from falling off due to vibration, which would cause the wall-connecting locking mechanism 3 to become unstable and cause a safety accident. Meanwhile, under the abutment of the return spring 342 on the clamping and fixing bolts 325, the clamping and fixing bolts 325 do not need to be tightened with nuts. This allows the operators to operate on the safety ladder cage during installation, reducing the number of times they have to climb the pier and work in the air, and reducing construction risks.

[0030] To ensure the stability of the movement of the connecting bolt 325 driven by the pull rope 35, such as Figure 4 , Figure 6 As shown, the top of the docking box 34 is provided with a guide pulley 343 located above the center of the crossbar 3252 of the docking fixing bolt 325. The pull rope 35 is wound around the guide pulley 343 and connected to the crossbar 3252 of the docking fixing bolt 325; Figure 3 , Figure 5 As shown, the guide pulley 343 includes a bracket 3431 mounted on the top of the docking box 34 and a fixed pulley 3432 mounted on the bracket 3431. The pull rope 35 is wound around the fixed pulley 3432. The fixed pulley 3432 enables the pull rope 35 to smoothly drive the docking fixing bolt 325 to move up and down, thereby achieving connection stability of the first extension section 314 and the second extension section 324, and effectively preventing the pull rope 35 from directly contacting the docking box 34, thus avoiding wear and breakage of the pull rope 35 due to continuous friction.

[0031] Furthermore, to avoid issues at bends during the installation of the 35mm pull rope, such as... Figure 4 At point A, the pull rope 35 could not be properly attached to the second boom 321 and the docking box 34, and was instead suspended in the air, resulting in uneven stress on the pull rope 35 and its breakage; or as... Figure 6 At point B, the pull rope 35 broke due to friction with the edge of the docking box 34; Figure 1 , Figure 4 , Figure 6As shown, the second boom 321 and the second large boom 32 are provided with guide rings 351 for the pull rope 35 to pass through. The guide rings 351 are located at the bends where the pull rope 35 is laid. By setting the guide rings 351 at the bends, the direction of the pull rope 35 is controlled, ensuring that the pull rope 35 is always laid close to the second boom 321 and preventing friction between the pull rope 35 and the edge of the docking box 34. As a preferred method, to prevent the pull rope 35 from shifting during the traction and lifting process, thus affecting the traction effect of the pull rope 35, such as... Figure 1 , Figure 6 As shown, the guide ring 351 is also arranged in the straight line direction of the position where the pull rope 35 is laid; specifically, at least two guide rings 351 are arranged along the length direction of the second boom 32 and at least two guide rings 351 are arranged along the length direction of the second boom 321. The pull rope 35 passes through the guide rings 351 arranged on the second boom 32 and the second boom 321 in sequence and then connects with the crossbar 3252 of the docking fixing bolt 325, thereby driving the docking fixing bolt 325 to move up and down, so as to realize the stable connection between the first boom 311 and the second boom 321; the above-mentioned guide ring 351 can be made of hollow iron pipe to save costs and ensure the layout of the pull rope 35.

[0032] To facilitate adjustment of the distance between adjacent first booms 311 and adjacent second booms 321 according to the diameter of the pier, the bolt connection methods between the first boom 311 and the first main boom 31, and between the second boom 321 and the second main boom 32, are as follows: Figure 1 , Figure 2 , Figure 3As shown, specifically, the first boom 31 has a first horizontal bolt hole group 315 and a first vertical bolt hole group 316 evenly distributed along the length of the first boom 31. The first horizontal bolt hole group 315 and the first vertical bolt hole group 316 are staggered on the first boom 31, and both the first horizontal bolt hole group and the first vertical bolt hole group 316 include two bolt holes. The second boom 32 has a second horizontal bolt hole group 326 and a second vertical bolt hole group 327 distributed along the length of the second boom 32. The second horizontal bolt hole group 326 and the second vertical bolt hole group 327 are staggered on the second boom 32, and both the second horizontal bolt hole group 326 and the second vertical bolt hole group 327 include two bolt holes. Bolt holes; the end of the first connecting part 313 is provided with a first slot 3131 adapted to the first upper arm 31, the first slot 3131 is provided with a first bolt hole group 3132 corresponding to the first horizontal bolt hole group 315, and the first slot 3131 is also provided with a first bolt 3133 that passes through the first bolt hole group 3132 and the first horizontal bolt hole group 315 in sequence; the end of the second connecting part 323 is provided with a second slot 3231 adapted to the second upper arm 32, the second slot 3231 is provided with a second bolt hole group 3232 corresponding to the second horizontal bolt hole group 326, and the second slot 3231 is also provided with a second bolt 3233 that passes through the second bolt hole group 3232 and the second horizontal bolt hole group 326 in sequence. The first connecting part 313, which has a first slot 3131, and the second connecting part 323, which has a second slot 3231, are connected by the first slot 3131 to the first main arm 31 and the second slot 3231 to the second main arm 32. A first bolt 3133 is then passed through the first bolt hole group 3132 on the first slot 3131 and the first horizontal bolt hole group 315 on the first main arm 31 to connect and fix the first slot 3131 to the first main arm 31. The second slot 3231 is then connected to the second main arm 32. The second bolt 3233 is passed sequentially through the second bolt hole group 3232 opened on the second slot 3231 and the second horizontal bolt hole group 326 opened on the second boom 32 to connect and fix the second slot 3231 and the second boom 32. Each bolt hole group includes at least two bolt holes to ensure connection stability. By opening multiple groups of first horizontal bolt holes 315 and second horizontal bolt holes 326 on the first boom 31 and the second boom 32, the layout spacing of the first boom 311 and the second boom 321 can be adjusted according to the diameter of the pier column to adapt to the installation of pier columns of different diameters, so as to be reused and save costs.

[0033] Furthermore, such as Figure 1 , Figure 2As shown, the ladder reinforcement and fixing mechanism 4 is made of an integrally formed L-shaped steel. The horizontal section 42 of the ladder reinforcement and fixing mechanism 4 has a third horizontal bolt hole group 421 corresponding to the first horizontal bolt hole group 315 and the second horizontal bolt hole group 326. The vertical section 43 of the ladder reinforcement and fixing mechanism 4 has a third vertical bolt hole group 431 corresponding to the first vertical bolt hole group 316 and the second vertical bolt hole group 327. The ladder reinforcement and fixing mechanism 4 also has a third bolt 44 that sequentially passes through the first horizontal bolt hole group 315, the third horizontal bolt hole group 421, and sequentially passes through the second horizontal bolt hole group 326 and the third horizontal bolt hole group 421. The ladder reinforcement and fixing mechanism 4 also has a third bolt that sequentially passes through the first vertical bolt hole group 316, the third vertical bolt hole group 431, and sequentially passes through the second vertical bolt hole group 327 and the third vertical bolt hole group 431. The fourth bolt 45; an integrally formed L-shaped steel is used as the ladder reinforcement and fixing mechanism 4, and a third horizontal bolt hole group 421 corresponding to the first horizontal bolt hole group 315 and the second horizontal bolt hole group 326, and a third vertical bolt hole group 431 corresponding to the first vertical bolt hole group 316 and the second vertical bolt hole group 327 are opened on the ladder reinforcement and fixing mechanism 4; the vertical connection stability between the ladder reinforcement and fixing mechanism 4 and the wall-connecting locking mechanism 3 is ensured by the vertical connection of the first horizontal bolt hole group 315, the third horizontal bolt hole group 421, the second horizontal bolt hole group 326, and the third horizontal bolt hole group 421, and the horizontal connection stability between the ladder reinforcement and fixing mechanism 4 and the wall-connecting locking mechanism 3 is ensured by the horizontal connection of the first vertical bolt hole group 316, the third vertical bolt hole group 431, the second vertical bolt hole group 327, and the third vertical bolt hole group 431. By setting multiple sets of first vertical bolt hole group 316, second vertical bolt hole group 327, third horizontal bolt hole group 421, and first vertical bolt hole group 316, second vertical bolt hole group 327, and third vertical bolt hole group 431, the connection stability between the ladder strengthening and fixing mechanism 4 and the wall-connecting locking mechanism 3 is ensured; it is easy to disassemble and reuse.

Claims

1. A wall-tethering device for a safety ladder for bridge piers, characterized in that: The system includes a wall-connecting locking mechanism (3) and a ladder reinforcement and fixing mechanism (4) for installing a safety ladder. The wall-connecting locking mechanism (3) includes a first main arm (31) and a second main arm (32) arranged in parallel. The ladder reinforcement and fixing mechanism (4) has a U-shaped structure with its opening facing the wall-connecting locking mechanism (3). The ladder reinforcement and fixing mechanism (4) is bolted to the wall-connecting locking mechanism (3). The first main arm (31) is provided with two first booms (311) arranged in parallel and facing the second main arm (32). The first boom (311) includes a first connecting part (313) and a first extension section (314) connected in sequence. The first connecting part (313) is bolted to the first main arm (31). The second main arm (32) is provided with two second booms (321) arranged in parallel and facing the first main arm (31). (321) includes a second connecting part (323) and a second extension section (324) connected in sequence. The second connecting part (323) is bolted to the second boom (32). The end of the first extension section (314) is inserted into the second extension section (324). The second extension section (324) is provided with a butt fixing bolt (325) for connecting the second extension section (324) and the first extension section (314). The butt fixing bolt (325) is a U-shaped bolt with the opening facing downward. The two parallel vertical rods (3251) of the butt fixing bolt (325) pass through the second extension section (324) and the first extension section (314) in sequence. The adjacent first boom (311), second boom (321) together with the first boom (31) and the second boom (32) form a square cavity (33) for the bridge pier to pass through.

2. The wall ties for a safety ladder for bridge piers as described in claim 1, characterized in that: Each of the second extension sections (324) has a docking box (34) at its top. The docking box (34) contains a limiting cylinder (341) for moving the docking fixing bolt (325). The limiting cylinder (341) includes two vertical limiting sections (3411) that penetrate the docking box (34) for moving the vertical rod (3251) of the docking fixing bolt (325), and a horizontal rod (3252) for moving the docking fixing bolt (325). A horizontal limiting section (342) is located above the vertical limiting section (3411) and connected to the two vertical limiting sections (3411); the length of the vertical limiting section (3411) is greater than the length of the docking fixing bolt (325), and a pull rope (35) passing through the docking box (34) is connected to the crossbar (3252) of the docking fixing bolt (325). The pull rope (35) drives the docking fixing bolt (325) to move up and down inside the limiting cylinder (341).

3. The wall-connecting device for a safety ladder for bridge piers as described in claim 2, characterized in that: Each docking box (34) is provided with a return spring (342) corresponding to the vertical rod (3251) of the docking fixing bolt (325). One end of the return spring (342) is connected to the top of the docking box (34), and the other end is connected to the docking fixing bolt (325).

4. The wall ties for a safety ladder for bridge piers as described in claim 2, characterized in that: The top of the docking box (34) is provided with a guide pulley (343) located above the center of the crossbar (3252) of the docking fixing bolt (325). The pull rope (35) is wound around the guide pulley (343) and connected to the crossbar (3252) of the docking fixing bolt (325).

5. The wall ties for a safety ladder for bridge piers as described in claim 4, characterized in that: The second boom (321) and the second large boom (32) are provided with guide rings (351) for the pull rope (35) to pass through. The guide rings (351) are located at the bends where the pull rope (35) is laid.

6. The wall ties for a safety ladder for bridge piers as described in claim 5, characterized in that: The guide ring (351) is also set in the straight line direction of the position where the pull rope (35) is laid.

7. The wall ties for a safety ladder for bridge piers as described in claim 1, characterized in that: The first boom (31) is provided with a first horizontal bolt hole group (315) and a first vertical bolt hole group (316) evenly arranged along the length direction of the first boom (31). The first horizontal bolt hole group (315) and the first vertical bolt hole group (316) are staggered on the first boom (31). Both the first horizontal bolt hole group (315) and the first vertical bolt hole group (316) include two bolt holes. The second boom (32) is provided with a second horizontal bolt hole group (326) and a second vertical bolt hole group (327) arranged along the length direction of the second boom (32). The second horizontal bolt hole group (326) and the second vertical bolt hole group (327) are staggered on the second boom (32). Both the second horizontal bolt hole group (326) and the second vertical bolt hole group (327) include two bolt holes. The end of the first connecting part (313) is provided with a first slot (3131) adapted to the first large arm (31), and the first slot (3131) is provided with a first bolt hole group (3132) corresponding to the first horizontal bolt hole group (315). The first slot (3131) is also provided with a first bolt (3133) that passes through the first bolt hole group (3132) and the first horizontal bolt hole group (315) in sequence. The end of the second connecting part (323) is provided with a second slot (3231) adapted to the second arm (32). The second slot (3231) is provided with a second bolt hole group (3232) corresponding to the second horizontal bolt hole group (326). The second slot (3231) is also provided with a second bolt (3233) that passes through the second bolt hole group (3232) and the second horizontal bolt hole group (326) in sequence.

8. The wall ties for a safety ladder for bridge piers as described in claim 7, characterized in that: The ladder reinforcement and fixing mechanism (4) is made of an integrally formed L-shaped steel; the horizontal section (42) of the ladder reinforcement and fixing mechanism (4) is provided with a third horizontal bolt hole group (421) corresponding to the first horizontal bolt hole group (315) and the second horizontal bolt hole group (326); the vertical section (43) of the ladder reinforcement and fixing mechanism (4) is provided with a third vertical bolt hole group (431) corresponding to the first vertical bolt hole group (316) and the second vertical bolt hole group (327); the ladder reinforcement and fixing mechanism (4) The fixing mechanism (4) is also provided with a third bolt (44) that passes through the first horizontal bolt hole group (315), the third horizontal bolt hole group (421) in sequence, and the second horizontal bolt hole group (326) and the third horizontal bolt hole group (421) in sequence; the ladder strengthening fixing mechanism (4) is also provided with a fourth bolt (45) that passes through the first vertical bolt hole group (316), the third vertical bolt hole group (431) in sequence, and the second vertical bolt hole group (327) and the third vertical bolt hole group (431) in sequence.

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