An assembled cantilever walkway for tower crane attachment and detachment

Abstract

The application discloses an assembled cantilever passageway for tower crane attachment and detachment, which comprises a tower crane standard section, a rotary table is arranged on the lower end crossbar of the tower crane standard section, a rotary plate is rotatably connected to the rotary table, a plurality of fixed passageways are arranged at the end of the rotary plate away from the tower crane standard section, first lifting rings are arranged at the middle parts of the left and right sides of the fixed passageways, steel wires are arranged on the first lifting rings, the fixed passageways away from the rotary plate are matched with telescopic passageways through second connecting plates, the telescopic passageways comprise external sliding rail passageways and internal sliding rail passageways, second lifting rings are arranged on the two sides of the front part of the external sliding rail passageways, steel wires are arranged on the second lifting rings, the steel wires are matched with electric hoist mechanisms on the tower crane standard section, the rotary table and the rotary plate are arranged, the cantilever passageway can be rotated and matched with the fixed passageways and the telescopic passageways to realize length adjustment of the cantilever passageway, and it is convenient for construction personnel to detach the tower crane attachments with different lengths.

Description

Technical Field

[0001] This invention belongs to the field of tower crane assembly and disassembly technology, and specifically relates to a prefabricated cantilevered walkway for tower crane attachment and disassembly. Background Technology

[0002] Tower cranes are a common type of lifting equipment used on construction sites. In order for the tower crane to cover the entire site, there are strict requirements for its positioning. In many cases, tower cranes are attached to a gable wall or an enclosed exterior wall. When it comes time to dismantle the tower crane, since the gable wall or enclosed exterior wall cannot provide a platform for people to go up, the project often adopts the method of setting up an operating frame or installing a suspended basket from the bottom to facilitate dismantling. This process involves high labor costs, high material consumption, and a long time span.

[0003] To address the aforementioned issues, Chinese invention patent application number 201620235490.8 discloses an auxiliary ladder for dismantling tower crane tie rods. It includes a support frame with a single-layer hinged lug plate. Each lug plate is composed of a single-layer plate body, with a clamping mechanism at one end. This clamping mechanism secures the lug plate to the support frame. A pin hole is located on the other end of the lug plate. One end of the auxiliary ladder is connected to one end of the double-layer hinged lug plate via a pin shaft. A traction steel wire is located on each side of the other end of the auxiliary ladder, with one end connected to the other end of the ladder and the other end connected to an electric hoist mechanism. One end of the ladder is fixed to the support frame or a standard section beam. An electric hoist lifts both sides from above, suspending the other end until it reaches the support node. Then, professional installation and dismantling personnel proceed along the ladder to the support node to carry out dismantling work.

[0004] However, the auxiliary ladder for tower crane tie rod removal cannot flexibly adjust its length. For some sloping buildings, the attachment length of the tower crane varies, and it cannot adapt flexibly. Furthermore, the auxiliary ladder for tower crane tie rod removal achieves the rotation of the ladder through the cooperation of single-layer hinged lugs, double-layer hinged lugs, and traction steel wires. It cannot reliably fix the ladder, which is prone to shaking when workers remove the tower crane attachment, posing a safety hazard. Summary of the Invention

[0005] This invention provides a prefabricated cantilevered walkway for tower crane attachment and dismantling, aiming to solve the problems of traditional tower crane tie rod dismantling auxiliary devices being unable to flexibly adjust the working length and having insufficient rotation stability when dismantling tower crane attachments of different lengths.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A prefabricated cantilevered walkway for tower crane attachment and dismantling includes: a tower crane standard section; a turntable is provided on the lower crossbar of the tower crane standard section; a rotating plate is rotatably connected to the turntable; a plurality of fixed walkways are provided at the end of the rotating plate away from the tower crane standard section; second connecting plates are provided on the front and rear sides of the fixed walkways; first connecting plates are provided on the front and rear sides of the rotating plate; the rotating plate cooperates with the second connecting plates on adjacent fixed walkways through the first connecting plates; a first lifting ring is provided in the middle of the left and right sides of each fixed walkway; a steel wire rope is provided on the first lifting ring; adjacent fixed walkways cooperate through adjacent second connecting plates; and the fixed walkway away from the rotating plate cooperates with a telescopic walkway through the second connecting plates; the telescopic walkway... The passageway includes an external slide rail passageway and an internal slide rail passageway. A third connecting plate is provided on the rear side of the external slide rail passageway, which cooperates with a second connecting plate on an adjacent fixed passageway via the third connecting plate. Slide grooves are provided on both sides of the lower part of the external slide rail passageway, and sliders are provided on both sides of the internal slide rail passageway. The sliders are adapted to the slide grooves. A support plate is provided in the lower middle part of the external slide rail passageway, and a limit block is provided on the support plate. The limit block cooperates with a baffle on the rear side of the internal slide rail passageway to limit the sliding distance of the internal slide rail passageway. Second lifting rings are provided on both sides of the front part of the external slide rail passageway, and steel wire ropes are provided on the second lifting rings. All steel wire ropes cooperate with the electric hoist mechanism on the standard section of the tower crane.

[0008] Furthermore, guardrails are provided on both sides of the fixed passageway, the external sliding rail passageway, and the internal sliding rail passageway. The external sliding rail passageway has guardrail grooves for avoiding the guardrails on the internal sliding rail passageway.

[0009] Furthermore, the front sides of the external slide rail passage are threaded with locking bolts, which are used to fix the internal slide rail passage.

[0010] Furthermore, the rotating plate includes: a rotating plate surface, a first connecting plate provided on the front and rear sides of the rotating plate surface, a connecting sleeve provided in the middle of the lower surface of the rotating plate surface, and a connecting groove provided on the inner wall of the connecting sleeve.

[0011] Furthermore, the turntable includes an upper turntable and a turntable fixing block. The upper turntable is positioned above the lower horizontal bar of the tower crane standard section, and the turntable fixing block is positioned below the lower horizontal bar of the tower crane standard section and is used to fix the upper turntable by bolts and nuts.

[0012] Furthermore, a first boss is provided on the upper turntable, and a second boss is provided on the upper middle part of the first boss. Two electric push rods are provided above the second boss, distributed around the center of the second boss. The extended ends of the electric push rods are provided with telescopic blocks. A controller is provided in the middle of the second boss, and a power supply is provided below the controller. The controller is electrically connected to the electric push rods and the power supply respectively. A cover plate is provided above the second boss. The upper surface of the second boss and the lower surface of the cover plate are provided with mounting grooves for installing the electric push rods, the controller, and the power supply. The circumferential sidewalls of the second boss and the cover plate are provided with receiving grooves for accommodating the telescopic blocks. The telescopic blocks cooperate with the connecting slots on the turntable.

[0013] Furthermore, the shape of the telescopic block is adapted to the contour of the connecting slot, and anti-slip pads are provided on the adjacent sidewalls of the telescopic block and the connecting slot.

[0014] Furthermore, the first connecting plate, the second connecting plate, and the third connecting plate are all provided with connecting holes, and the first connecting plate and the second connecting plate, the second connecting plate and the second connecting plate, and the second connecting plate and the third connecting plate are all connected by bolts and nuts.

[0015] Furthermore, the lower surface of the rotating plate is provided with reinforcing ribs, and the lower surface of the fixed passageway plate is provided with a first reinforcing plate in the middle.

[0016] Furthermore, a second reinforcing plate is provided on the front side of the lower surface of the external slide rail passage.

[0017] Compared with the prior art, the present invention has the following technical effects:

[0018] 1. The prefabricated cantilever walkway for tower crane attachment and dismantling described in this invention, by setting up a turntable and a rotating plate, allows the cantilever walkway to rotate and cooperate with fixed and telescopic walkways to achieve length adjustment of the cantilever walkway, facilitating the dismantling of tower crane attachments of different lengths by construction personnel; the fixed walkway provides a stable passage, allowing workers to walk and operate safely at heights, while the telescopic walkway can be extended or retracted as needed, improving the applicability of the cantilever walkway; the external and internal sliding rail walkways achieve smooth sliding through the cooperation of sliding grooves and sliders, and support plates and limit blocks are set in the middle and lower parts to ensure the safety of the internal sliding rail walkway and prevent it from falling off; by setting up a wire rope and electric hoist mechanism, the cantilever walkway can provide strong load-bearing capacity to meet the needs of cantilever walkway operations, and by adjusting the length of the wire rope, the angle of the cantilever walkway can be adjusted, facilitating the dismantling of tower crane attachments at different positions on both sides by construction personnel.

[0019] 2. The prefabricated cantilever walkway for tower crane attachment and dismantling described in this invention provides boundaries and protection through the installation of guardrails, ensuring that workers will not accidentally fall during walking and working on the cantilever walkway.

[0020] 3. The prefabricated cantilever walkway for tower crane attachment and disassembly described in this invention enables rapid installation of the turntable through the combination of an upper turntable and a turntable fixing block, improving the construction efficiency of workers. By cooperating with the connecting slot on the turntable via the telescopic block, when the electric push rod is fully retracted and the telescopic block retracts into the receiving slot, the construction worker can place the turntable on the turntable and then control the electric push rod to push the telescopic block out, allowing it to engage with the connecting slot and preventing the turntable from falling off. When the cantilever walkway rotates to the required angle, the electric push rod can be controlled to extend further, causing the side wall of the telescopic block to abut against the side wall of the connecting slot, preventing further rotation of the cantilever walkway, ensuring the safety of construction workers, and also enabling rapid locking and unlocking of the cantilever walkway, improving its practical flexibility. Attached Figure Description

[0021] Figure 1 This is an isometric drawing of a prefabricated cantilevered walkway for tower crane attachment and disassembly as described in this invention.

[0022] Figure 2 This is an isometric drawing of a prefabricated cantilevered walkway for tower crane attachment and disassembly as described in this invention.

[0023] Figure 3 This is a schematic diagram of a fixed passageway for the assembly-type cantilevered passageway used for tower crane attachment and disassembly, as described in this invention.

[0024] Figure 4 This is a schematic diagram of a fixed passageway for the attachment and disassembly of a tower crane, as described in this invention.

[0025] Figure 5 This is a schematic diagram of a retractable walkway for attaching and disassembling tower cranes, as described in this invention.

[0026] Figure 6 This is a schematic diagram of a retractable walkway for attaching and disassembling tower cranes, as described in this invention.

[0027] Figure 7 This is a schematic diagram of a retractable walkway for attaching and disassembling tower cranes, as described in this invention.

[0028] Figure 8 This is a schematic diagram of a rotating plate and turntable for a prefabricated cantilevered walkway for tower crane attachment and disassembly, as described in this invention.

[0029] Figure 9This is a schematic diagram of the interior of a rotating plate of a prefabricated cantilevered passageway for tower crane attachment and disassembly, as described in this invention.

[0030] Figure 10 This is a schematic diagram of a prefabricated cantilevered walkway for tower crane attachment and disassembly as described in this invention.

[0031] Figure 11 This is a schematic diagram of the interior of a turntable for a prefabricated cantilevered walkway used for tower crane attachment and disassembly, as described in this invention.

[0032] Figure 12 This is a schematic diagram of the internal arrangement of the turntable and turntable of a prefabricated cantilevered walkway for tower crane attachment and disassembly, as described in this invention.

[0033] In the picture:

[0034] 1. Tower crane standard section; 2. Turning plate; 201. Turning plate surface; 202. First connecting plate; 203. Reinforcing rib; 204. Connecting sleeve; 205. Connecting slot; 3. Fixed passageway; 301. Fixed passageway surface; 302. First reinforcing plate; 303. First lifting ring; 304. Second connecting plate; 4. Telescopic passageway; 401. External sliding rail passageway; 402. Internal sliding rail passageway; 403. Guardrail groove; 404. Sliding block; 405. Second lifting ring 406. Locking bolt; 407. Third connecting plate; 408. Slide groove; 409. Baffle; 410. Support plate; 411. Limiting block; 412. Second reinforcing plate; 5. Steel wire rope; 6. Turntable; 601. Upper turntable; 602. Turntable fixing block; 603. First boss; 604. Second boss; 605. Cover plate; 606. Telescopic block; 607. Electric push rod; 608. Controller; 609. Receiving groove; 610. Power supply; 7. Guardrail. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present application and with reference to the accompanying drawings.

[0036] like Figure 1-7As shown, a prefabricated cantilevered walkway for tower crane attachment and disassembly includes: a tower crane standard section 1, a turntable 6 is provided on the lower crossbar of the tower crane standard section 1, a rotating plate 2 is rotatably connected to the turntable 6, a plurality of fixed walkways 3 are provided at the end of the rotating plate 2 away from the tower crane standard section 1, second connecting plates 304 are provided on the front and rear sides of the fixed walkways 3, first connecting plates 202 are provided on the front and rear sides of the rotating plate 2, the rotating plate 2 cooperates with the second connecting plates 304 on the adjacent fixed walkways 3 through the first connecting plates 202, a first lifting ring 303 is provided in the middle of the left and right sides of the fixed walkway 3, a steel wire rope 5 is provided on the first lifting ring 303, adjacent fixed walkways 3 cooperate through adjacent second connecting plates 304, and the fixed walkway 3 away from the rotating plate 2 cooperates with the telescopic walkway 4 through the second connecting plates 304; the telescopic walkway 4 includes: an external sliding rail walkway 401 and The external slide rail passage 401 has a third connecting plate 407 on its rear side. The external slide rail passage 401 is connected to the second connecting plate 304 on the adjacent fixed passage 3 via the third connecting plate 407. The lower two sides of the external slide rail passage 401 are provided with slide grooves 408. The two sides of the internal slide rail passage 402 are provided with sliders 404, which are adapted to the slide grooves 408. The lower middle part of the external slide rail passage 401 is provided with a support plate 410, which is provided with a limit block 411. The limit block 411 is connected to the baffle 409 on the rear side of the internal slide rail passage 402 to limit the sliding distance of the internal slide rail passage 402. The front two sides of the external slide rail passage 401 are provided with second lifting rings 405, which are provided with wire ropes 5. The wire ropes 5 are connected to the electric hoist mechanism on the standard section 1 of the tower crane.

[0037] The rotating connection between the rotating plate 2 and the turntable 6 allows the cantilevered walkway to rotate on one side of the tower crane standard section 1, facilitating the removal of tower crane attachments at different locations on one side of the tower crane standard section 1 by construction personnel. In practice, construction personnel can rotate the cantilevered walkway by adjusting the lengths of the steel wire ropes 5 on both sides of the fixed walkway 3 and the telescopic walkway 4 using an electric hoist mechanism. The built-in sliding rail walkway 402 is telescopically installed below the external sliding rail walkway 401. The sliders 404 on both sides of the built-in sliding rail walkway 402 connect with the external sliding rail walkway 401. The sliding grooves 408 on both sides of the lower part of the sliding rail passage 401 cooperate to realize the sliding of the built-in sliding rail passage 402, which makes it convenient for construction personnel to adjust the length of the cantilever passage. The lower middle part of the external sliding rail passage 401 is provided with a support plate 410, and a limit block 411 is provided on the support plate 410. The limit block 411 cooperates with the baffle 409 on the rear side of the built-in sliding rail passage 402 to limit the sliding distance of the built-in sliding rail passage 402, which can prevent the built-in sliding rail passage 402 from falling off the external sliding rail passage 401.

[0038] like Figure 1-7As shown, guardrails 7 are provided on both sides of the fixed passageway 3, the external sliding rail passageway 401 and the internal sliding rail passageway 402. The external sliding rail passageway 401 is provided with a guardrail groove 403 for avoiding the guardrails 7 on the internal sliding rail passageway 402.

[0039] The guardrail 7 provides boundaries and protection to ensure that workers do not fall accidentally while walking and working on the cantilevered passageway. The guardrails 7 on both sides of the built-in slide rail passageway 402 are located inside the guardrails 7 on both sides of the external slide rail passageway 401. The external slide rail passageway 401 is provided with guardrail grooves 403 to avoid the guardrails 7 on the built-in slide rail passageway 402, so as to facilitate the sliding of the built-in slide rail passageway 402 on the external slide rail passageway 401. The guardrail 7 can adopt a splicing structure, with threaded connections between each horizontal and vertical bar, right-angle elbows at the corners, and threaded connections between the vertical bars and the passageway, which can facilitate the assembly and disassembly of the entire cantilevered passageway.

[0040] like Figure 5-7 As shown, locking bolts 406 are threadedly connected to both sides of the front part of the external slide rail passage 401. The locking bolts 406 are used to fix the internal slide rail passage 402.

[0041] Once the built-in slide rail passage 402 has slid to the required length, the construction personnel can tighten the locking bolt 406 to fix the built-in slide rail passage 402. The end of the locking bolt 406 passes through the side wall of the external slide rail passage 401 and abuts against the side wall of the slider 404 of the built-in slide rail passage 402, thereby fixing the built-in slide rail passage 402.

[0042] like Figure 8-9 As shown, the rotating plate 2 includes: a rotating plate surface 201, a first connecting plate 202 provided on the front and rear sides of the rotating plate surface 201, a connecting sleeve 204 provided in the middle of the lower surface of the rotating plate surface 201, and a connecting groove 205 provided on the inner wall of the connecting sleeve 204.

[0043] like Figure 2 and Figure 8 As shown, the turntable 6 includes an upper turntable 601 and a turntable fixing block 602. The upper turntable 601 is located above the lower horizontal bar of the tower crane standard section 1, and the turntable fixing block 602 is located below the lower horizontal bar of the tower crane standard section 1 and is used to fix the upper turntable 601 by bolts and nuts.

[0044] The turntable 6 is divided into an upper turntable 601 and a lower turntable fixing block 602. The upper turntable 601 and the turntable fixing block 602 cooperate to form a clamping structure, thereby fixing the turntable 6 on the lower horizontal bar of the tower crane standard section, which facilitates disassembly and installation by construction personnel.

[0045] like Figure 10-11As shown, the upper turntable 601 is provided with a first boss 603, and a second boss 604 is provided in the upper middle part of the first boss 603. Two electric push rods 607 are provided above the second boss 604 and evenly distributed around the circumference of the second boss 604. The extended end of the electric push rod 607 is provided with a telescopic block 606. A controller 608 is provided in the middle of the second boss 604, and a power supply 610 is provided below the controller 608. The controller 608 is electrically connected to the electric push rods 607 and the power supply 610 respectively. A cover plate 605 is provided above the second boss 604. The upper surface of the second boss 604 and the lower surface of the cover plate 605 are provided with mounting grooves for installing the electric push rods 607, the controller 608 and the power supply 610. The circumferential sidewalls of the second boss 604 and the cover plate 605 are provided with receiving grooves 609 for accommodating the telescopic block 606. The telescopic block 606 cooperates with the connecting slot 205 on the turntable 2.

[0046] When the rotating plate 2 is fitted onto the turntable 6, the lower surface of the connecting slot 205 in the rotating plate 2 is at the same level as the lower surface of the receiving slot 609 of the second protrusion 604 in the upper turntable 601, and the telescopic block 606 abuts against the lower surface of the receiving slot 609. The construction worker controls the electric push rod 607 via the controller 608 to extend the telescopic block 606 a certain distance, so that the lower side wall of the telescopic block 606 engages with the lower side wall of the connecting slot 205. However, the outer circular side wall of the telescopic block 606 does not contact the circumferential side wall of the connecting slot 205, thus achieving the connection between the rotating plate 2 and the turntable 6. The rotating plate 1 can rotate on the turntable 6 but will not fall off. At this time, the construction worker can use an electric hoist mechanism to adjust the length of the wire rope to flexibly rotate the cantilevered passageway. After the cantilevered passageway rotates to the required angle, the construction worker can... The controller 608 controls the electric push rod 607 to extend further, causing the side wall of the telescopic block 606 to abut against the side wall of the connecting slot 205, thereby locking the rotating plate 2 and the turntable 6, preventing them from rotating, ensuring the stability of the cantilevered passageway, and ensuring the safety of construction personnel when performing tower crane attachment and dismantling operations. Compared with traditional hinged and pin connections, the rotation angle of the cantilevered passageway is more flexible, and the abutment between the telescopic block 606 and the connecting slot 205 can lock the rotating plate 2 and the turntable 6, preventing the cantilevered passageway from shaking due to instability at the connection point, which would affect the construction work. The controller 608 controls the extension and retraction length of the electric push rod 607 to achieve the engagement, locking, and disengagement of the rotating plate 2 and the turntable 6, which is convenient and quick, and can effectively improve the construction efficiency of construction personnel.

[0047] like Figure 11 As shown, the shape of the telescopic block 606 is adapted to the contour of the connecting slot 205, and anti-slip pads are provided on the adjacent side walls of the telescopic block 606 and the connecting slot 205.

[0048] By setting anti-slip pads, the friction between the side wall of the telescopic block 606 and the side wall of the connecting slot 205 can be further improved, thereby enhancing the stability of the fit between the rotating plate 2 and the turntable 6.

[0049] like Figure 3-4 and Figure 6-8 As shown, the first connecting plate 202, the second connecting plate 304 and the third connecting plate 407 are all provided with connecting holes, and the first connecting plate 202 and the second connecting plate 304, the second connecting plate 304 and the third connecting plate 407 are all connected by bolts and nuts.

[0050] like Figure 4 and Figure 8 As shown, the lower surface of the rotating plate 201 is provided with reinforcing ribs 203, and the lower surface of the fixed passageway plate 301 is provided with a first reinforcing plate 302 in the middle.

[0051] like Figure 7 As shown, a second reinforcing plate 412 is provided on the front side of the lower surface of the external slide rail passage 401.

[0052] The addition of reinforced sections and reinforcing ribs 203 effectively improves the load-bearing capacity of the fixed passageway 3 and the retractable passageway 4, thereby enhancing the stability of the entire cantilevered passageway.

[0053] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A prefabricated cantilevered walkway for tower crane attachment and dismantling, characterized in that, include: A tower crane standard section (1) has a turntable (6) on its lower crossbar. A rotating plate (2) is rotatably connected to the turntable (6). Several fixed passageways (3) are provided at the end of the rotating plate (2) away from the tower crane standard section (1). Second connecting plates (304) are provided on the front and rear sides of the fixed passageways (3). First connecting plates (202) are provided on the front and rear sides of the rotating plate (2). The rotating plate (2) is connected to the adjacent fixed passageways (304) through the first connecting plates (202). The second connecting plate (304) on the fixed passage (3) is engaged with the second connecting plate (304). The middle of the left and right sides of the fixed passage (3) is provided with a first lifting ring (303). The first lifting ring (303) is provided with a steel wire rope (5). The adjacent fixed passages (3) are engaged with the adjacent second connecting plate (304). The fixed passage (3) away from the rotating plate (2) is engaged with the telescopic passage (4) through the second connecting plate (304). The telescopic passage (4) includes: an external sliding rail passage (401) and an internal sliding rail passage (402). The external slide rail passage (401) is provided with a third connecting plate (407) on its rear side. The external slide rail passage (401) cooperates with the second connecting plate (304) on the adjacent fixed passage (3) through the third connecting plate (407). The lower two sides of the external slide rail passage (401) are provided with slide grooves (408). The two sides of the internal slide rail passage (402) are provided with sliders (404). The sliders (404) are adapted to the slide grooves (408). The middle and lower part of the external slide rail passage (401) The part is provided with a support plate (410), and a limit block (411) is provided on the support plate (410). The limit block (411) cooperates with the baffle (409) on the rear side of the built-in slide rail passage (402) to limit the sliding distance of the built-in slide rail passage (402). The front two sides of the external slide rail passage (401) are provided with second lifting rings (405), and steel wire ropes (5) are provided on the second lifting rings (405). The steel wire ropes (5) are all cooperated with the electric hoist mechanism on the tower crane standard section (1). The rotating plate (2) includes: a rotating plate surface (201), a first connecting plate (202) is provided on the front and rear sides of the rotating plate surface (201), a connecting sleeve (204) is provided in the middle of the lower surface of the rotating plate surface (201), and a connecting groove (205) is provided on the inner wall of the connecting sleeve (204). The turntable (6) includes an upper turntable (601) and a turntable fixing block (602). The upper turntable (601) is located below the lower horizontal bar of the tower crane standard section (1), and the turntable fixing block (602) is located above the lower horizontal bar of the tower crane standard section (1) and is used to fix the upper turntable (601) by bolts and nuts. The turntable fixing block (602) is provided with a first boss (603), and a second boss (604) is provided in the upper middle part of the first boss (603). Two electric push rods (607) are evenly distributed around the circumference of the second boss (604) above the second boss (604). Telescopic blocks (606) are provided at the extended ends of the electric push rods (607). A controller (608) is provided in the middle of the second boss (604), and a power supply (610) is provided below the controller (608). The controller (608) is connected to the electric push rods (607) respectively. 7) Electrically connected to the power supply (610), a cover plate (605) is provided above the second boss (604), the upper surface of the second boss (604) and the lower surface of the cover plate (605) are provided with mounting grooves for installing electric push rod (607), controller (608) and power supply (610), and receiving grooves (609) for accommodating telescopic block (606) are provided on the circumferential sidewalls of the second boss (604) and the cover plate (605), and the telescopic block (606) cooperates with the connecting slot (205) on the rotating plate (2); The shape of the telescopic block (606) is adapted to the outline of the connecting slot (205), and anti-slip pads are provided on the adjacent side walls of the telescopic block (606) and the connecting slot (205).

2. The prefabricated cantilevered walkway for tower crane attachment and dismantling according to claim 1, characterized in that, The fixed passageway (3), the external sliding rail passageway (401) and the internal sliding rail passageway (402) are all equipped with guardrails (7) on both sides. The external sliding rail passageway (401) is provided with a guardrail groove (403) for avoiding the guardrail (7) on the internal sliding rail passageway (402).

3. A prefabricated cantilevered walkway for tower crane attachment and dismantling according to claim 2, characterized in that, The front sides of the external slide rail passage (401) are threaded with locking bolts (406), which are used to fix the internal slide rail passage (402).

4. A prefabricated cantilevered walkway for tower crane attachment and dismantling according to claim 3, characterized in that, The first connecting plate (202), the second connecting plate (304) and the third connecting plate (407) are all provided with connecting holes. The first connecting plate (202) and the second connecting plate (304), the second connecting plate (304) and the third connecting plate (407) are all connected by bolts and nuts.

5. A prefabricated cantilevered walkway for tower crane attachment and dismantling according to claim 4, characterized in that, The lower surface of the rotating plate (201) is provided with reinforcing ribs (203), and the fixed passage (3) includes a fixed passage plate (301), and a first reinforcing plate (302) is provided in the middle of the lower surface of the fixed passage plate (301).

6. A prefabricated cantilevered walkway for tower crane attachment and dismantling according to claim 5, characterized in that, A second reinforcing plate (412) is provided on the front side of the lower surface of the external slide rail passage (401).

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