A supporting device for hoisting a rotary digging pile reinforcement cage

Abstract

The application discloses a supporting device for hoisting a rotary digging pile steel reinforcement cage. The supporting device comprises a collecting assembly, the collecting assembly comprises a cylinder with an open top, a guide assembly made of rubber is installed on the top of the cylinder, a supporting assembly and a traction assembly are installed on the top of the cylinder and are arranged in the guide assembly, the supporting assembly comprises a plurality of supporting arms and a plurality of protective sleeves; the supporting arms are annularly distributed on the top of the cylinder, the protective sleeves are connected with the guide assembly, the protective sleeves are rotationally connected with the supporting arms, and the supporting arms are rotationally connected with the cylinder; the protective sleeves sleeved on the bottom of the steel reinforcement cage are pulled by the traction assembly to support and protect the bottom of the steel reinforcement cage, the bottom of the steel reinforcement cage is covered by the guide assembly, the cuttings falling from the inner wall of a pile hole due to the steel reinforcement cage are guided to fall into the cylinder by the guide assembly, and the cuttings are collected by the cylinder, so that a thick and heavy cuttings layer is avoided to be formed at the bottom of the hole, and the bearing capacity and stability of the pile foundation are ensured.

Description

Technical Field

[0001] This invention relates to the field of foundation pit reinforcement cage support, and more particularly to a support device for hoisting rotary drilling pile reinforcement cages. Background Technology

[0002] Rotary drilling pile foundation pit refers to foundation pit engineering that uses rotary drilling cast-in-place piles as the main support structure. This is a common form of foundation pit support in building foundation construction. Its core is to use a rotary drilling rig to drill holes, put a steel cage into the pile hole, and pour concrete to form support piles.

[0003] Currently, the reinforcing cage is hoisted into the pile hole using a two-point hoisting method. Since the lower end of the reinforcing cage is directly exposed, the position of the reinforcing cage needs to be repeatedly adjusted during hoisting to ensure that all the reinforcing bars can be inserted into the pile hole. Therefore, the entire hoisting and insertion process consumes a lot of time. At the same time, after being inserted into the hole, the reinforcing cage will scrape against the inner wall of the pile hole when it is lowered, causing a large amount of soil to fall off. Excessive soil will form a thick layer of sediment at the bottom of the hole. The thick layer of sediment will significantly reduce the bearing capacity of the pile end, thereby directly affecting the stability and bearing capacity of the pile foundation. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that when the steel cage is hoisted into the pile hole, the position of the steel cage needs to be repeatedly adjusted, and the steel cage scrapes against the inner wall of the pile hole during lowering, resulting in a large amount of slag falling to the bottom of the hole and forming a thick layer of sediment. Therefore, a support device for hoisting the steel cage of rotary drilling pile is proposed.

[0005] To achieve the above objectives, the present invention provides a support device for hoisting a rotary drilling pile reinforcement cage. The support device includes a collecting component, a guiding component, a supporting component, and a traction component. The collecting component includes a cylindrical body with an open top. A rubber guiding component is installed on the top of the cylindrical body. The supporting component and the traction component are installed inside the guiding component and located at the top of the cylindrical body. The supporting component includes multiple sets of supporting arms and multiple protective sleeves. The supporting arms are arranged in a ring at the top of the cylindrical body. The protective sleeves are connected to the guiding component and rotatably connected to the supporting arms. The supporting arms are rotatably connected to the cylindrical body, and elastic elements are provided at the connection points between the supporting arms, the protective sleeves, and the cylindrical body. The guiding component contracts or expands under the action of the supporting component. In the open state, the inner diameter of the guiding component is larger than the outer diameter of the reinforcement cage, and the outer diameter matches the inner diameter of the pile hole. In the contracted state, the outer diameter of the guiding component is smaller than the inner diameter of the reinforcement cage. The outer diameter of the cylindrical body is smaller than the inner diameter of the reinforcement cage. The traction component is located inside the cylindrical body and is used to traction the cylindrical body.

[0006] During the hoisting of the reinforcing cage, the guide component is extended and fitted at the bottom of the reinforcing cage, with the reinforcing bars at the bottom of the cage inserted into the protective sleeve. The traction component pulls the cylinder upward, protecting the bottom of the reinforcing cage during hoisting. The debris that falls from the inner wall of the pile hole due to the scraping of the reinforcing cage is guided into the cylinder by the guide component. After the traction component is loosened, the cylinder, under its own weight and the weight of the debris, pulls the guide component away from the reinforcing cage. The elastic element rebounds, causing the support arm and the protective sleeve to move closer to the traction component, causing the guide component to retract.

[0007] A preferred technical solution of the present invention is as follows: a first guide rail is coaxially fixed to the top of the cylinder; the traction assembly includes a traction rod; a second guide rail coaxially arranged with the first guide rail is fixed to the lower end of the traction rod; the first guide rail and the second guide rail are connected by connecting arms with grooves at both ends; the number of connecting arms matches the number of support arms, and the lower end of each support arm is rotatably connected to the connecting arm; the spacing between two adjacent protective sleeves is adjusted by sliding the grooves with the first and second guide rails.

[0008] A preferred technical solution of the present invention is as follows: the guiding component includes a rubber cover that is detachable from the top of the cylinder, and the rubber cover is detachable from the protective sleeve.

[0009] The preferred technical solution of the present invention is that the bottom of the cylinder is an open structure, and a bottom cover is hinged to the bottom of the cylinder.

[0010] The preferred technical solution of the present invention is as follows: the end of the connecting arm away from the traction rod and the lower end of the protective sleeve are both fixed with connecting seats with shafts; one end of the support arm is rotatably connected to the connecting seat shaft at the end of the connecting arm away from the traction rod, and the other end is rotatably connected to the connecting seat shaft at the lower end of the protective sleeve, and a coil spring is fixed between the shaft of each connecting seat and the support arm.

[0011] A preferred technical solution of the present invention is as follows: a counterweight is movably installed at the upper end of the traction rod, and a lifting ring is fixed at the upper end of the counterweight.

[0012] The preferred technical solution of the present invention is as follows: the protective sleeve has a slot vertically formed on its side wall, and the inner wall of the rubber cover has a plurality of locking blocks that are adapted to the slot.

[0013] The preferred technical solution of the present invention is that the top of the rubber cover is integrally formed with a rubber hopper, and the rubber hopper is an inverted frustum-shaped structure.

[0014] A preferred technical solution of the present invention is as follows: the counterweight block has a movable hole larger than the outer diameter of the traction rod, and the upper end of the traction rod is fixed with a limiting plate that matches the movable hole.

[0015] The preferred technical solution of the present invention is that the limiting plate and the counterweight are both provided with multiple pressure relief holes that communicate with the movable holes.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] 1. This invention uses multiple annularly distributed protective sleeves and inclined support arms to form an inverted frustum-shaped structure. The frustum structure facilitates the rapid insertion of the lower end of the reinforcing cage into the pile hole. At the same time, the bottom of the reinforcing cage is also protected by a guiding component to prevent the lower reinforcing bars of the cage from directly piercing the inner wall of the pile hole, thus reducing the scraping of the reinforcing cage against the inner wall of the pile hole. Moreover, the soil and debris that fall off the inner wall of the pile hole due to scraping by the reinforcing cage are guided by the guiding component into the cylinder, so that the cylinder can collect the scraped soil and debris, thereby avoiding the formation of a thick layer of sediment at the bottom of the hole and ensuring the bearing capacity and stability of the pile foundation.

[0018] 2. This invention uses a traction component to pull the support component, so that the protective sleeve is fitted onto the bottom steel bars of the steel cage to form a bottom support point. Combined with the traditional hoisting point, it forms a three-point hoisting structure, which significantly enhances the hoisting stability of the steel cage, prevents swaying and displacement, and at the same time distributes the load of the stirrups to avoid accidents caused by weld breakage leading to the steel cage falling.

[0019] 3. This invention adjusts the outer diameter of multiple annularly distributed protective sleeves by rotating the support arm, thus making them suitable for steel cages with different outer diameters. By cooperating with the guide rail and rotating around the traction rod, the spacing of the protective sleeves can be adjusted according to the number of steel bars, so that the protective sleeves can support the steel bars at the bottom of the steel cage at intervals, thereby adapting to the use of different numbers of steel bars.

[0020] 4. The upper guide component of this invention is made of rubber material and is supported by an internal support component. During the hoisting of the steel cage, the guide component is fully opened and fitted at the bottom of the steel cage, which can guide, support and protect the hoisting of the steel cage. When the steel cage is hoisted to a certain distance from the bottom of the hole, the cylinder can be controlled to drive the guide component to detach from the steel cage and retract the guide component so that its diameter is smaller than the diameter of the steel cage. In addition, the diameter of the cylinder is also smaller than the diameter of the steel cage, so that the entire device can be lifted back to the ground through the hollow area in the middle of the steel cage, and the collected slag can be discharged and reused. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0023] Figure 3 This is a cross-sectional view of the cylindrical body and guide assembly of the present invention;

[0024] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point B;

[0025] Figure 5 This is a schematic diagram of the traction rod structure of the present invention;

[0026] Figure 6 This is a partial structural diagram of the traction component of the present invention;

[0027] Figure 7 This is a schematic diagram of the guiding component structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the support component structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the overall structure of the invention and the installation state of the reinforcing cage;

[0030] Figure 10 This is a schematic diagram of the internal structure of the pile hole in this invention.

[0031] Legend: 10. Collection component; 11. Cylinder; 12. Bottom cover; 13. First guide rail; 20. Guiding component; 21. Rubber cover; 22. Rubber hopper; 23. Locking block; 30. Support component; 31. Protective sleeve; 311. Slot; 32. Connecting arm; 321. Slide groove; 33. Support arm; 34. Connecting seat; 35. Coil spring; 36. Protective shell; 40. Traction component; 41. Traction rod; 411. Second guide rail; 42. Limiting plate; 43. Pressure relief hole; 44. Counterweight; 441. Movable hole; 442. Lifting ring; 45. Steel cable; 50. Reinforcing cage; 51. Reinforcing bar; 60. Pile hole. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] The embodiment provides a support device for hoisting the reinforcing cage of a rotary drilling pile, such as Figure 1 - Figure 10As shown, the support device includes a collecting component 10, a guiding component 20, a support component 30, and a traction component 40. The collecting component 10 includes a cylindrical body 11 with an open top, and the outer diameter of the cylindrical body 11 is smaller than the inner diameter of the reinforcing cage 50. The guiding component 20 is installed on the top of the cylindrical body 11 and is made of rubber. When open, its inner diameter is larger than the outer diameter of the reinforcing cage 50, and its outer diameter matches the inner diameter of the pile hole 60. The support component 30 and the traction component 40 are both disposed inside the guiding component 20 and are both located on top of the cylindrical body 11. The support assembly 30 is used to open the guide assembly 20. The support assembly 30 includes multiple sets of support arms 33 and multiple protective sleeves 31. The protective sleeves 31 are used to be inserted into the steel bars 51 at the bottom of the steel cage 50. Multiple connecting arms 32 are distributed in a ring on the top surface of the cylinder. Multiple sets of support arms 33 are distributed in a ring inside the guide assembly 20 above the cylinder 11. The protective sleeves 31 are located on top of the support arms 33 and are connected to the guide assembly 20. One end of the support arm 33 is rotatably connected to the cylinder 11, and the other end is rotatably connected to the protective sleeve 31.

[0034] When the protective sleeve 31 moves closer to the traction component 40, it causes the rubber guide component 20 to contract. Therefore, by rotating the support arm 33, the guide component 20 can be opened so that its diameter is larger than that of the rebar cage 50, and can be fitted onto the bottom of the rebar cage 50. Alternatively, the guide component 20 can be retracted so that its overall diameter is smaller than that of the inner diameter of the rebar cage 50. The outer diameter of the multiple annularly distributed protective sleeves 31 can also be adjusted by rotating the support arm 33, thus making it suitable for rebar cages with different outer diameters.

[0035] like Figures 1 to 3 As shown, the traction component 40 is located at the center of the cylinder 11 and is connected to multiple connecting arms 32. The steel cable 45 at the top of the traction component 40 pulls the protective sleeve 31 fitted at the bottom of the rebar cage to support and protect the bottom of the rebar. Multiple annularly distributed protective sleeves 31 and inclined support arms 33 form an inverted frustum structure. The frustum structure guides the lower end of the rebar cage to be quickly inserted into the pile hole. At the same time, the bottom of the rebar cage is also covered and protected by the guide component 20 to prevent the rebar at the lower end of the rebar cage from directly piercing the inner wall of the pile hole.

[0036] Meanwhile, during the hoisting process, after the steel cable 45 is connected to and tightened by the hook of the crane, the upward traction of the traction component 40 ensures that the guide component 20 always has an upward pulling force. It is fitted at the bottom of the reinforcing cage 50 and, with the cooperation of the support component 30, can support the bottom of the reinforcing cage. This, combined with the traditional two-point hoisting, forms a three-point hoisting method with two points plus bottom support, making the reinforcing cage more stable during hoisting. At the same time, it reduces the load on the stirrups during two-point hoisting and avoids the problem of the stirrups breaking and falling from the weld point due to overload. After the reinforcing cage is hoisted into the pile hole, the soil that falls off the inner wall of the pile hole due to the scraping of the reinforcing cage is guided by the guide component 20 into the cylinder 11. The cylinder 11 collects the scraped soil, thereby preventing the formation of a thick layer of sediment at the bottom of the hole and ensuring the bearing capacity and stability of the pile foundation.

[0037] After the traction component 40 is loosened (that is, the steel cable 45 is loosened), the cylinder 11 and the guide component 20 lose the upward lifting force. At this time, under the combined gravity of the cylinder 11 itself and the collected slag inside, the cylinder 11 drives the guide component 20 and the protective sleeve 31 to move downward. During the movement, the protective sleeve 31 separates from the steel bar 51, and the elastic rebound causes the support arm 33 and the protective sleeve 31 to move closer to the traction component 40. At the same time, the protective sleeve 31 drives the rubber guide component 20 to contract. At this time, the diameter of the entire device is smaller than the inner diameter of the steel cage 50, so the cylinder 11 can be lifted from the hollow area of ​​the steel cage 50 to outside the pile hole 60 through the steel cable 45.

[0038] It is worth noting that, in order to facilitate the adjustment of the tension of the steel cable 45, a tensioner is connected between the upper end of the steel cable 45 and the hook, so that the tensile strength of the steel cable 45 can be adjusted by adjusting the tensioner.

[0039] like Figure 3 , Figure 4 , Figure 5 , Figure 8 As shown in the embodiment, the top of the cylinder 11 is coaxially fixed with an annular first guide rail 13, the traction assembly 40 includes a traction rod 41, the lower end of the traction rod 41 is fixed with an annular second guide rail 411 coaxially arranged with the first guide rail 13, and each connecting arm 32 is provided with a sliding groove 321 at both ends that matches the first guide rail 13 and the second guide rail 411 respectively. One end of each connecting arm 32 is slidably connected to the first guide rail 13 through the sliding groove 321, and the other end is slidably connected to the second guide rail 411 through the sliding groove 321.

[0040] The spacing between adjacent protective sleeves 31 is adjusted by sliding the groove 321 with the first guide rail 13 and the second guide rail 411. Therefore, the spacing of the protective sleeves 31 is adjusted according to the number of vertical steel bars in different steel cages. When the number of protective sleeves 31 is less than the number of steel bars, the connecting arm 32 slides with the first guide rail 13 and the second guide rail 411 through the grooves 321 at both ends and rotates around the traction rod 41 to adjust the spacing of the protective sleeves 31. In this way, the spacing of the protective sleeves 31 can be adjusted according to the number of steel bars so that the protective sleeves 31 can support the steel bars at the bottom of the steel cage at intervals, thereby adapting to the use of different numbers of steel bars. At the same time, the steel bars not covered by the protective sleeves 31 are still covered in the guide component 20 so that the lower end of the exposed steel bars is protected by the guide component 20.

[0041] like Figure 3 , Figure 8 As shown in the embodiment, the end of the connecting arm 32 away from the traction rod 41 and the lower end of the protective sleeve 31 are both fixed with connecting seats 34 equipped with shafts; the two ends of the support arm 33 are respectively rotatably connected to the connecting arm 32 and the connecting seats 34 of the protective sleeve 31. A coil spring 35 is fixed between the shaft of the connecting seat 34 and the support arm 33. The inner end of the coil spring 35 is fixed to the shaft, and the outer end is fixed to the support arm 33. Therefore, when the support arm 33 and the protective sleeve 31 rotate clockwise around the shaft... When the needle rotates, the coil spring 35 coils up and stores force. After the protective sleeve 31 detaches from the lower end of the reinforcing bar, the rebound force of the coil spring 35 causes the protective sleeve 31 and the support arm 33 to rotate counterclockwise around the axis and move towards the traction rod 41 to accommodate the protective sleeve 31 and the support arm 33, making it easier to lift the cylinder 11 out of the reinforcing cage. In order to prevent the slag from getting stuck on the coil spring 35, a protective shell 36 covering the coil spring 35 is fixed on the support arm 33 (e.g., Figure 3 (As shown).

[0042] In the embodiments, such as Figure 3 , Figure 5 , Figure 6 As shown, a vertically movable counterweight 44 is installed at the upper end of the traction rod 41. A lifting ring 442 is fixed at the upper end of the counterweight 44, and the steel cable 45 is fixed on the lifting ring 442. When the protective sleeve 31 is stuck on the steel bar, the counterweight 44 is lifted upward and then lowered. At this time, the protective sleeve 31 can be easily removed from the steel bar by relying on the inertial force of the counterweight 44.

[0043] In the embodiments, such as Figure 3 , Figure 5 , Figure 6As shown, the counterweight 44 has a movable hole 441 larger than the outer diameter of the traction rod 41. The traction rod 41 passes through the movable hole 441 from the bottom of the counterweight 44. A limiting plate 42 adapted to the movable hole 441 is fixed to the upper end of the traction rod 41. The counterweight 44 has a two-half structure to facilitate the installation of the limiting plate 42 into the movable hole 441. Figure 5 , Figure 6 As shown, multiple pressure relief holes 43 connected to the movable hole 441 are opened on both the limiting plate 42 and the counterweight 44. When the counterweight 44 is lifted and falls, the pressure relief holes 43 release pressure into the movable hole 441 to reduce the pressure in the movable hole 441, so that the counterweight 44 can better impact the traction rod 41 downward.

[0044] In the embodiments, such as Figure 3 , Figure 7 As shown, the guide assembly 20 includes a rubber cover 21 detachably mounted to the top of the cylinder 11, and flanges are fixed to both the top of the cylinder 11 and the bottom of the rubber cover 21 to facilitate the assembly and disassembly of the cylinder 11 and the rubber cover 21. The rubber cover 21 is also detachably mounted to the protective sleeve 31. Therefore, by assembling and disassembling the guide assembly 20, it can be replaced according to the different diameters of the pile holes, thereby ensuring a full fit between the guide assembly 20 and the pile hole. Figure 7 and Figure 10 As shown, the rubber hopper 22, integrally formed on the top of the rubber cover 21, is an inverted frustoconical structure. Therefore, when the rubber cover 21 is lowered into the pile hole, the outward-folding structure of the upper edge of the rubber hopper 22 ensures full fit with the pile hole, thereby improving the collection effect of scraped and fallen soil.

[0045] like Figure 2 , Figure 7 , Figure 8 As shown, through the slot 311 vertically opened on the side wall of the protective sleeve 31, the inner wall of the rubber cover 21 is fixed with a number of slots 23 that are adapted to the slots 311. The slots 23 have a T-shaped cross section and are vertically slid into the slots 311 to facilitate the quick assembly and disassembly of the protective sleeve 31 and the rubber cover 21.

[0046] like Figure 9 , Figure 10 As shown, the bottom of the cylinder 11 is an open structure. A bottom cover 12 is hinged to one side of the bottom of the cylinder 11. The bottom of the cylinder 11 and the side of the bottom cover 12 away from the hinge are connected by multiple buckles so that the slag collected inside the cylinder 11 can be discharged easily by opening the bottom cover 12.

[0047] The working process of this invention: as follows Figure 9 and Figure 10As shown, select the appropriate rubber cover 21 and rubber bucket 22 according to the diameter of the pile hole 60, and connect the two flanges by the cooperation of the bolt and nut group; then rotate and adjust the connecting arm 32 according to the number of steel bars in the steel cage 50 so that multiple protective sleeves 31 are evenly distributed at the bottom of the steel cage 50, and then insert the locking block 23 into the corresponding slot 311 of the protective sleeve 31 to complete the connection between the rubber cover 21 and the protective sleeve 31. Then flip the support arm 33 and the protective sleeve 31 outward so that the coil spring 35 elastically stores force and pulls the steel cable 45 so that the protective sleeve 31 is inserted into the corresponding steel bar 51.

[0048] Hang the upper end of the tensioner on the hook and rotate the tensioner to retract it. Pull the lifting ring 442 and the traction rod 41 through the steel cable 45. The traction rod 41 pulls the cylinder 11, the connecting arm 32, and the support arm 33. At this time, under the pulling force, the protective sleeve 31 is firmly fixed to the lower end of the rebar. The rebar cage 50 is lifted by the crane and placed into the pile hole. The scraped soil falls into the cylinder 11 through the rubber bucket 22 and the rubber cover 21. After reaching the preset depth (that is, the depth that can ensure the cylinder 11 continues to descend and the guide component 20 is completely separated from the rebar cage 50, and the protective sleeve 31 is separated from the lower end of the rebar), the tensioner is loosened. The cylinder 11, detached from the reinforcing cage 50, continues to move downwards under its own weight and the weight of the slag inside, causing the protective sleeve 31 to completely detach from the reinforcing steel. At this point, the guide component 20 has detached from the reinforcing cage and is no longer supported. The coil spring 35 rebounds, causing the support arm 33 and the protective sleeve 31 to move closer to the traction rod 41. At the same time, the protective sleeve 31 causes the rubber cover 21 and the rubber bucket 22 to contract, becoming smaller than the inner diameter of the reinforcing cage. The reinforcing cage 50 continues to be lowered to the bottom of the hole. When the reinforcing cage 50 continues to be lowered, the cylinder 11 and the guide component 20 are both located in the hollow area inside the reinforcing cage 50, which will not affect the continued descent of the reinforcing cage 50. When the reinforcing cage 50 is lowered to the bottom of the pile hole 60, the hoisting rope is removed from the stirrups. At this time, with the cooperation of the steel cable 45 and the crane, the cylinder 11 for collecting slag can be lifted from the hollow area of ​​the reinforcing cage 50 to above the opening of the pile hole 60, and the cylinder 11 is moved to the slag dumping area. The bottom cover 12 of the cylinder 11 is opened, and the slag inside the cylinder 11 is cleaned out.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A support device for hoisting a rotary drilling pile reinforcement cage, characterized in that: The support device includes a collection component (10), a guide component (20), a support component (30), and a traction component (40). The collection component (10) includes a cylindrical body (11) with an open top. A rubber guide component (20) is installed on the top of the cylindrical body (11). The support component (30) and the traction component (40) are installed inside the guide component (20) and located on the top of the cylindrical body (11). The support component (30) includes multiple sets of support arms (33) and multiple protective sleeves (31). The multiple sets of support arms (33) are arranged in a ring on the top of the cylindrical body (11). The protective sleeves (31) are connected to the guide component (20). 1) Rotatably connected to the support arm (33), the support arm (33) is rotatably connected to the cylinder (11), and the connection between the support arm (33) and the protective sleeve (31) and the cylinder (11) is provided with an elastic element; the guide component (20) contracts or opens under the action of the support component (30). When the guide component (20) is open, its inner diameter is larger than the outer diameter of the steel cage (50), and its outer diameter matches the inner diameter of the pile hole (60). When the guide component (20) is contracted, its outer diameter is smaller than the inner diameter of the steel cage (50). The outer diameter of the cylinder (11) is smaller than the inner diameter of the steel cage (50). The traction component (40) is located inside the cylinder (11) and is used to traction the cylinder (11). When hoisting the steel cage (50), the guide component (20) is spread out and fitted at the bottom of the steel cage (50), and the steel bars at the bottom of the steel cage (50) are inserted into the protective sleeve (31). The traction component (40) pulls the cylinder (11) upward, so that the guide component (20) protects the bottom of the steel cage (50) during the hoisting process. The slag that falls off the inner wall of the pile hole due to the scraping of the steel cage falls into the cylinder (11) under the guidance of the guide component (20). After the traction component (40) is loosened, the cylinder (11) drives the guide component (20) to detach from the steel cage (50) under its own weight and the weight of the slag. The elastic element rebounds and causes the support arm (33) and the protective sleeve (31) to move closer to the traction component (40), causing the guide component (20) to retract. The top of the cylinder (11) is coaxially fixed with a first guide rail (13). The traction assembly (40) includes a traction rod (41). The lower end of the traction rod (41) is fixed with a second guide rail (411) coaxially arranged with the first guide rail (13). The first guide rail (13) and the second guide rail (411) are connected by connecting arms (32) with grooves (321) at both ends. The number of connecting arms (32) matches the number of support arms (33), and the lower end of each support arm (33) is rotatably connected to the connecting arm (32). The distance between two adjacent protective sleeves (31) is adjusted by sliding the grooves (321) with the first guide rail (13) and the second guide rail (411).

2. The support device for hoisting the reinforcing cage of a rotary drilling pile according to claim 1, characterized in that... The guide assembly (20) includes a rubber cover (21) that is detachable from the top of the cylinder (11), and the rubber cover (21) is detachable from the protective sleeve (31).

3. The support device for hoisting the reinforcing cage of a rotary drilling pile according to claim 1, characterized in that: The bottom of the cylinder (11) is an open structure, and a bottom cover (12) is hinged to the bottom of the cylinder (11).

4. The support device for hoisting the reinforcing cage of a rotary drilling pile according to claim 1, characterized in that: The connecting arm (32) is fixed with a connecting seat (34) with a shaft at one end away from the traction rod (41) and at the lower end of the protective sleeve (31); one end of the support arm (33) is rotatably connected to the connecting seat (34) at the end of the connecting arm (32) away from the traction rod (41), and the other end is rotatably connected to the connecting seat (34) at the lower end of the protective sleeve (31), and a coil spring (35) is fixed between the shaft of each connecting seat (34) and the support arm (33).

5. A support device for hoisting a rotary drilling pile reinforcement cage according to claim 1, characterized in that: A counterweight (44) is movably mounted on the upper end of the traction rod (41), and a lifting ring (442) is fixed on the upper end of the counterweight (44).

6. A support device for hoisting a rotary drilling pile reinforcement cage according to claim 2, characterized in that: The protective sleeve (31) has a slot (311) vertically opened on the side wall, and the inner wall of the rubber cover (21) is fixed with a plurality of locking blocks (23) that are adapted to the slot (311).

7. A support device for hoisting a rotary drilling pile reinforcement cage according to claim 2, characterized in that: The top of the rubber cover (21) is integrally formed with a rubber bucket (22), which is an inverted frustum-shaped structure.

8. A support device for hoisting a rotary drilling pile reinforcement cage according to claim 5, characterized in that: The counterweight (44) has an movable hole (441) larger than the outer diameter of the traction rod (41), and the upper end of the traction rod (41) is fixed with a limiting plate (42) that is adapted to the movable hole (441).

9. A support device for hoisting a rotary drilling pile reinforcement cage according to claim 8, characterized in that: The limiting plate (42) and the counterweight (44) are each provided with a number of pressure relief holes (43) that communicate with the movable hole (441).

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