A reinforcing cage suspender fixing device convenient to disassemble

Abstract

The application relates to a reinforcing cage lifting bar fixing device convenient to disassemble, which is installed one by one with lifting bars, one end of the lifting bar is fixed to a reinforcing cage, and the reinforcing cage lifting bar fixing device comprises: a lifting bar limiting piece fixedly installed at the other end of the lifting bar; two hanging plates which are arranged in parallel to each other and are hung on the barrel opening of a steel casing; and multiple stiffening plates which are arranged between the two hanging plates, one of the stiffening plates is provided with a lifting bar hole, the lifting bar passes through the lifting bar hole, and the lifting bar limiting piece abuts against one side of the stiffening plate to hinder the lifting bar from separating from the lifting bar hole. According to the application, the strength of the traditional lifting bar hanging plate is improved, and the application has reusability.

Description

Technical Field

[0001] This application relates to the field of building construction technology, specifically to a rebar cage suspension fixing device that is easy to disassemble. Background Technology

[0002] Drilled cast-in-place piles are a common type of foundation used in bridge construction. During the hoisting of the reinforcing cage, due to project requirements, the cage cannot be directly placed at the bottom of the pile. This necessitates that the cage be suspended within the pile foundation before the concrete hardens. To achieve this, lifting bars are typically used. These bars are welded to the reinforcing cage, and their length must be calculated based on the project's elevation. After the crane lifts the cage into the pile foundation, the lifting bars are welded to a hanging plate at the opening of the steel casing within the pile foundation, thus suspending the cage. These hanging plates are generally made of a single steel plate and directly welded to the steel casing. While their strength is sufficient for small reinforcing cages, they are not suitable for installing reinforcing cages in large-diameter, ultra-deep drilled cast-in-place piles. Furthermore, after the reinforcing cage installation is completed, these hanging plates are difficult to reuse, resulting in steel waste and increased construction costs. Summary of the Invention

[0003] This application provides a rebar cage hanging bar fixing device that is easy to disassemble, which improves strength compared to traditional hanging bar hanging plates and is also reusable.

[0004] This application provides a rebar cage suspension rod fixing device that is easy to disassemble. It is installed one-to-one with the suspension rods. One end of each suspension rod is fixed to the rebar cage. The rebar cage suspension rod fixing device includes: a suspension rod limiting member, which is fixedly installed at the other end of the suspension rod; two hanging plates, which are arranged parallel to each other and hooked onto the opening of the steel casing; and multiple stiffening plates, which are arranged between the two hanging plates. One of the stiffening plates has a suspension rod hole through which the suspension rod passes. The suspension rod limiting member abuts against one side of the stiffening plate to prevent the suspension rod from detaching from the suspension rod hole.

[0005] In some embodiments, the hanging plate includes a U-shaped portion and a vertical portion. The U-shaped portion is hooked onto the opening of the steel casing. One arm of the U-shaped portion is fixedly connected to the vertical portion and is located inside the opening of the casing. The other arm of the U-shaped portion is located outside the opening of the casing.

[0006] In some embodiments, the stiffening plate with the suspension rod hole is a first stiffening plate, which is located inside the cylinder opening, horizontally positioned between the vertical parts of the two hanging plates, and perpendicular to the vertical parts of the two hanging plates respectively.

[0007] In some embodiments, the apex of the vertical portion away from the U-shaped portion is a rounded chamfer.

[0008] In some embodiments, the U-shaped portion and the vertical portion are fixed together by welding.

[0009] In some embodiments, the U-shaped portion and the vertical portion are an integral structure.

[0010] In some embodiments, the multiple stiffening plates further include a second stiffening plate located outside the cylinder opening and disposed between the U-shaped portions of the two hanging plates. The second stiffening plate is vertically disposed and perpendicular to the U-shaped portions of the two hanging plates respectively.

[0011] In some embodiments, the multiple stiffening plates further include two third stiffening plates located inside the cylinder opening and disposed between the vertical portions of the two hanging plates. The third stiffening plates are vertically disposed and perpendicular to the vertical portions of the two hanging plates respectively. The stiffening plates with suspension rod holes are disposed on the top of the two third stiffening plates.

[0012] In some embodiments, the stiffening plate and the hanging plate are fixed together by welding.

[0013] In some embodiments, the surfaces of the hanging plate and the stiffening plate are coated with an anti-rust coating.

[0014] The beneficial effects of the technical solutions provided in this application include: In this application, the lifting bars and the lifting bar fixing devices of the steel cage are installed in a one-to-one correspondence. By passing the lifting bars through the lifting bar holes, the steel cage is precisely positioned, avoiding displacement or tilting, ensuring that the verticality of the pile foundation construction and the thickness of the protective layer meet the design requirements, and improving the quality of pile formation.

[0015] By setting the two hanging plates in parallel, the plates can be directly hooked onto the opening of the steel casing. This eliminates the need for on-site welding or complex fixing, allowing for rapid hoisting and positioning of the reinforcing cage, reducing construction time before the bored pile is poured, and minimizing the risk of hole shrinkage and collapse.

[0016] By placing multiple stiffening plates between two hanging plates and connecting the two hanging plates, a stable frame structure is formed, which can effectively distribute the hoisting load and reduce the possibility of deformation or breakage of the hanging plates. It is especially suitable for the hoisting needs of large-diameter or heavy-load steel cages.

[0017] By fixing the lifting rod limiting component to the other end of the lifting rod, and having a lifting rod hole in one of the stiffening plates, the lifting rod passes through the lifting rod hole, causing the lifting rod limiting component to abut against one side of the stiffening plate. In this way, a mechanical connection is formed between the lifting rod hole and the lifting rod limiting component. When disassembling, it is only necessary to release the fixed connection between the lifting rod and the steel cage and detach the lifting rod from the lifting rod hole to complete the separation. This avoids the cutting loss of traditional welding process, facilitates reuse, and saves material and labor costs.

[0018] Furthermore, the lifting bar limiting component abuts against the stiffening plate, forming a rigid limiting structure that prevents the lifting bar from detaching from the lifting bar hole. Compared to traditional binding or simple suspension methods, this effectively avoids the risk of the steel cage falling during hoisting, thus improving safety. Therefore, this application improves strength compared to traditional lifting bar hanging plates and also offers reusability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the horizontal installation of the rebar cage lifting rod fixing device (lifting rod limiting member not shown) on the steel casing in the embodiments of this application; Figure 2 for Figure 1 A schematic diagram of the center panel; Figure 3 for Figure 1 A cross-sectional view along the XX direction; Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0021] In the picture: 1. Hanging rods; 2. Hanging rod limiting components; 3. Hanging panel; 31. U-shaped section; 32. Vertical section; 4. Steel casing; 5. Stiffening plate; 51. First stiffening plate; 511. Hanger hole; 52. Second stiffening plate; 53. Third stiffening plate. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0023] This application provides a rebar cage hanging bar fixing device that is easy to disassemble. Compared with the traditional hanging bar hanging plate, it has improved strength and is also reusable.

[0024] See Figure 1 , Figure 1 This is a schematic diagram of the horizontal installation of the easily detachable rebar cage fixing device (rebar limiting member 2 not shown) on the steel casing 4 in an embodiment of this application. Figure 1 As shown, in one embodiment, the reinforcing cage hoist fixing device needs to be installed and used in a one-to-one correspondence with the hoisting bars 1, with one end of the hoisting bar 1 fixedly installed on the reinforcing cage. The reinforcing cage is a mesh structure woven from reinforcing bars, typically used for concrete reinforcement and support in construction projects. The fabrication of the reinforcing cage requires first weaving the reinforcing bars into a mesh structure at certain intervals and lengths, and then welding them together. During the fabrication process, the hoisting bars 1 are used to lift and suspend the reinforcing cage to facilitate welding. Furthermore, in the construction of bored piles for bridge foundations, the reinforcing cage is fixed to the opening of the steel casing 4 by the hoisting bars 1 to prevent the reinforcing cage from sinking. The connection between the hoisting bars 1 and the reinforcing cage is primarily by welding.

[0025] The reinforcement cage suspension device includes a suspension limiter 2, two hanging plates 3, and multiple stiffening plates 5. The suspension limiter 2 is fixedly installed at the other end of the suspension bar 1, and the connection between the suspension limiter 2 and the suspension bar 1 is primarily by welding. The two hanging plates 3 are arranged parallel to each other and are hook-shaped, allowing them to be directly hooked onto the opening of the steel casing 4. Multiple stiffening plates 5 are positioned between the two hanging plates 3, and one of the stiffening plates 5 has a suspension bar hole 511 through which the suspension bar 1 passes. The suspension limiter 2 abuts against one side of the stiffening plate 5, preventing the suspension bar 1 from detaching from the suspension bar hole 511. Therefore, under the combined action of the suspension bar 1, hanging plates 3, and stiffening plates 5, the reinforcement cage can be stably suspended within the pile foundation. Since the lifting bar limiting member 2 abuts against one side of the stiffening plate 5 with the lifting bar hole 511 to prevent the lifting bar 1 from leaving the lifting bar hole 511, the lifting bar limiting member 2 can be two steel bars, which are respectively welded to the other two sides of the lifting bar 1. The welding position needs to be determined in conjunction with the distance between the steel cage and the pile bottom.

[0026] In this embodiment, the lifting rod 1 and the lifting rod fixing device of the steel cage are installed one-to-one. By passing the lifting rod 1 through the lifting rod hole 511, the lifting rod hole 511 is used for precise positioning, which avoids the steel cage from shifting or tilting, ensures that the verticality of the pile foundation construction and the thickness of the protective layer meet the design requirements, and improves the quality of pile formation.

[0027] By setting the two hanging plates 3 in parallel, the hanging plates 3 can be directly hooked onto the opening of the steel casing 4. This eliminates the need for on-site welding or complex fixing, allowing for quick hoisting and positioning of the reinforcing cage, reducing construction time before the bored pile is poured, and minimizing the risk of hole shrinkage and collapse.

[0028] By placing multiple stiffening plates 5 between two hanging plates 3 and connecting the two hanging plates 3 with the multiple stiffening plates 5, a stable frame structure is formed, which can effectively distribute the hoisting load and reduce the possibility of deformation or breakage of the hanging plates 3. It is especially suitable for the hoisting needs of large-diameter or heavy-load steel cages.

[0029] By fixing the lifting rod limiting member 2 to the other end of the lifting rod 1, and by providing a lifting rod hole 511 in one of the stiffening plates 5, the lifting rod 1 passes through the lifting rod hole 511, so that the lifting rod limiting member 2 abuts against one side of the stiffening plate 5. In this way, a mechanical connection is formed between the lifting rod hole 511 and the lifting rod limiting member 2. When disassembling, it is only necessary to release the fixed connection between the lifting rod 1 and the steel cage and separate the lifting rod 1 from the lifting rod hole 511 to complete the separation. This avoids the cutting loss of traditional welding process, facilitates reuse, and saves material and labor costs.

[0030] Furthermore, the lifting bar limiting member 2 abuts against the stiffening plate 5, forming a rigid limiting structure that prevents the lifting bar 1 from detaching from the lifting bar hole 511. Compared with traditional binding or simple suspension methods, this effectively avoids the risk of the steel cage falling during hoisting and improves safety. Therefore, this embodiment improves strength compared to traditional lifting bar hanging plates and also has reusability.

[0031] In this embodiment, before the reinforcing cage is lowered into the pile foundation, the dimensions are measured and marked on the lifting rod 1 according to the designed distance between the reinforcing cage and the pile bottom, and the lifting rod limiting member 2 is fixedly installed at the marked location. One end of the lifting rod 1 is passed through the lifting rod hole 511 and fixedly installed on the reinforcing cage. Here, in order to facilitate the hooking of the hanging plate 3 onto the opening of the steel casing 4, the hanging plate 3 can also be temporarily fixed to the lifting rod 1.

[0032] Next, using existing lifting equipment, the lifting rod 1 is hoisted, along with the hanging plate 3, stiffening plate 5, and reinforcing cage on the lifting rod 1. The reinforcing cage is then lowered. During the lowering process, the direction and position of the hanging plate 3 can be adjusted to easily hook it onto the opening of the steel casing 4. After the hanging plate 3 is hooked onto the steel casing 4, its position is basically fixed. As the reinforcing cage continues to be lowered, the lifting rod limiting member 2 is locked by the lifting rod hole 511. At this point, the entire reinforcing cage is suspended inside the pile foundation by the reinforcing cage lifting rod 1 fixing device. This demonstrates that the reinforcing cage lifting rod 1 fixing device is not only simple in structure but also easy to operate, greatly improving the construction efficiency of bored pile construction.

[0033] When disassembling the fixing device for the reinforcing cage lifting rod 1, first separate one end of the lifting rod 1 from the reinforcing cage, then detach the lifting rod 1 from the lifting rod hole 511, and detach the hanging plate 3 and stiffening plate 5 from the opening of the steel casing 4. This ensures the integrity of the hanging plate 3 and stiffening plate 5, facilitating their continued use next time.

[0034] Furthermore, in one embodiment, participants Figure 2 , Figure 2 for Figure 1 A schematic diagram of the middle mounting plate 3. (See diagram below.) Figure 2 As shown, the hanging plate 3 includes a U-shaped part 31 and a vertical part 32. The U-shaped part 31 hooks onto the opening of the steel casing 4. One arm of the U-shaped part 31 is fixedly connected to the vertical part 32, both located inside the opening. The other arm of the U-shaped part 31 is located outside the opening. In this embodiment, the U-shaped part 31 and the vertical part 32 of the hanging plate 3 can be separate or integrated. The two arms of the U-shaped part 31 are located on the inner and outer sides of the opening of the steel casing 4, respectively. For ease of explanation, the arm located outside the opening is called the outer arm, and the arm located inside the opening is called the inner arm. The two arms naturally engage with the edge of the opening, directly hooking onto the opening. This allows for quick installation and disassembly without welding, drilling, or complex tools. In addition, the inner arm is fixedly connected to the vertical part 32 and closely adheres to the inner side of the cylinder opening; while the outer arm hooks onto the outer side of the cylinder opening, thus forming a "clamping" mechanical structure that can effectively resist the vertical tension and horizontal shear force, preventing the hanging plate 3 from falling off.

[0035] Furthermore, in one embodiment, participants Figure 3 and Figure 4 , Figure 3 for Figure 1 A cross-sectional diagram along the XX direction, in Figure 3 In the middle, the reinforcing cage has been suspended inside the pile foundation by a reinforcing cage suspension rod fixing device that is easy to disassemble; Figure 4 for Figure 3 An enlarged view of point A in the middle. (See diagram below.) Figure 3 and Figure 4 As shown, the stiffening plate 5 with lifting bar holes 511 is the first stiffening plate 51, located inside the cylinder opening, horizontally positioned between the vertical portions 32 of the two hanging plates 3, and perpendicular to the vertical portions 32 of the two hanging plates 3. In this embodiment, the vertical portions 32 of the two hanging plates 3 are rigidly connected by the horizontal stiffening plate 5 (i.e., the first stiffening plate 51), forming a "portal frame" structure, similar to a "frame beam" in a building structure, which can enhance the structure's resistance to lateral displacement. The lifting load (such as the self-weight of the reinforcing cage) transmitted by the lifting bar holes 511 is evenly distributed to the two hanging plates 3 through the stiffening plate 5, avoiding concentrated loads on a single hanging plate 3. For example, if a single hanging plate 3 bears a 5-ton load, after being distributed by the stiffening plate 5, the load on each hanging plate 3 can be reduced to 2.5 tons. Combined with the clamping force of the U-shaped portion 31, the overall pull-out safety factor is significantly improved.

[0036] Furthermore, in one embodiment, such as Figure 2As shown, the apex of the vertical portion 32 away from the U-shaped portion 31 is a rounded chamfer. In this embodiment, by setting the apex of the vertical portion 32 away from the U-shaped portion 31 as a rounded chamfer, the stress distribution of the vertical portion 32 is made more uniform, reducing the risk of local yielding or fatigue cracks in the vertical portion 32, which is especially suitable for working conditions that bear dynamic loads (such as repeated hoisting).

[0037] Furthermore, in one embodiment, the U-shaped portion 31 and the vertical portion 32 are fixed together by welding. In this embodiment, through the above technical solution, during pile foundation construction, the hanging plate 3 needs to withstand the impact load when the reinforcing cage is lowered (the instantaneous load can reach 1.5-2 times the static load). Since the welded connection has no moving parts, the risk of fatigue fracture caused by loose bolts can be avoided.

[0038] Furthermore, in one embodiment, the U-shaped portion 31 and the vertical portion 32 are an integral structure. In this embodiment, through the above technical solution, the integral structure is formed by integral stamping, casting or forging processes, which greatly shortens the manufacturing time and increases the overall strength.

[0039] Furthermore, in one embodiment, such as Figure 4 As shown, the multiple stiffening plates 5 also include a second stiffening plate 52, which is located on the outside of the cylinder opening and positioned between the U-shaped portions 31 of the two hanging plates 3. The second stiffening plate 52 is vertically arranged and perpendicular to the U-shaped portions 31 of the two hanging plates 3. In this embodiment, the second stiffening plate 52 is located on the outside of the cylinder opening and positioned between the U-shaped portions 31 of the two hanging plates 3, and its main function is to enhance the strength of the U-shaped portions 31. The vertical arrangement of the second stiffening plate 52 and its perpendicularity to the U-shaped portions 31 of the two hanging plates 3 greatly improves its horizontal bending stiffness.

[0040] Furthermore, in one embodiment, such as Figure 4 As shown, the multiple stiffening plates 5 also include two third stiffening plates 53, which are located inside the cylinder opening and positioned between the vertical portions 32 of the two hanging plates 3. The third stiffening plates 53 are vertically arranged and perpendicular to the vertical portions 32 of the two hanging plates 3. The stiffening plate 5 with suspension rod holes 511 is positioned on top of the two third stiffening plates 53. In this embodiment, the two third stiffening plates 53 are located inside the cylinder opening and positioned between the vertical portions 32 of the two hanging plates 3 to reinforce the connection between the vertical portions 32 of the two hanging plates 3. Through the above technical solution, the connection between the two hanging plates 3 can be made more stable. At the same time, the third stiffening plates 53 can provide vertical support, so that the load on the stiffening plate 5 with suspension rod holes 511 (i.e., the first stiffening plate 51) is transferred to the third stiffening plates 53 on both sides, avoiding the load from acting directly on the connection between the vertical portion 32 and the U-shaped portion 31 of the hanging plate 3.

[0041] Furthermore, in one embodiment, the stiffening plate 5 and the hanging plate 3 are fixed together by welding. In this embodiment, welding achieves atomic-level bonding through molten metal, resulting in high connection strength and rigidity, effectively transmitting various loads such as tension, compression, and shear. For the load-bearing system composed of the hanging plate 3 and the stiffening plate 5 (such as the cylinder opening bearing axial force, bending moment, or torque), welding ensures that the two form a rigid whole, avoiding the risk of structural failure due to loose connection, and is particularly suitable for bearing dynamic loads or high-stress conditions. For the stiffening plate 5, its core function is to improve the buckling resistance of the hanging plate 3 by increasing the moment of inertia of the cross section, while welding allows the stiffening plate 5 and the hanging plate 3 to fully cooperate in bearing the load, evenly distributing stress, and preventing premature local failure (such as bending deformation or tearing of the hanging plate 3 at the cylinder opening).

[0042] Furthermore, in one embodiment, both the hanging plate 3 and the stiffening plate 5 are coated with an anti-rust coating. In this embodiment, the anti-rust coating can form a continuous and dense isolation layer on the metal surface, preventing moisture, oxygen, salt spray, acid and alkali media in the air from directly contacting the steel, thereby inhibiting the occurrence of electrochemical corrosion (such as rusting).

[0043] Furthermore, in some other embodiments, if the hanging plate 3 and the stiffening plate 5 are fixed by welding, the oxide film on the steel surface is damaged during the welding process, and the weld and heat-affected zone are prone to becoming corrosion initiation points. The anti-rust coating can cover welding defects (such as micro-cracks and weld slag residue), preventing corrosion from spreading from weak points, especially providing protection for critical locations such as the "welding joint between the U-shaped part and the vertical part 32" and the "welding joint between the stiffening plate 5 and the hanging plate 3".

[0044] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0045] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A rebar cage fixing device that is easy to disassemble, which is installed one-to-one with the lifting bars (1), one end of the lifting bars (1) being fixed to the rebar cage, characterized in that, The steel cage suspension rod fixing device includes: The lifting rod limiting component (2) is fixedly installed at the other end of the lifting rod (1); Two hanging plates (3) are set parallel to each other, and the hanging plates (3) are hooked on the opening of the steel casing (4); Multiple stiffening plates (5) are set between two hanging plates (3). One of the stiffening plates (5) has a lifting rod hole (511). The lifting rod (1) passes through the lifting rod hole (511), and the lifting rod limiting member (2) abuts against one side of the stiffening plate (5) to prevent the lifting rod (1) from leaving the lifting rod hole (511).

2. The easily disassembled rebar cage fixing device as described in claim 1, characterized in that, The hanging plate (3) includes a U-shaped part (31) and a vertical part (32). The U-shaped part (31) is hooked on the opening of the steel casing (4). One arm of the U-shaped part (31) is fixedly connected to the vertical part (32) and both are located inside the opening of the casing. The other arm of the U-shaped part (31) is located outside the opening of the casing.

3. The easily disassembled rebar cage fixing device as described in claim 2, characterized in that, The stiffening plate (5) with the lifting rod hole (511) is the first stiffening plate (51). It is located inside the cylinder opening, horizontally positioned between the vertical parts (32) of the two hanging plates (3), and is perpendicular to the vertical parts (32) of the two hanging plates (3).

4. The easily disassembled rebar cage fixing device as described in claim 2, characterized in that, The top corner of the vertical part (32) away from the U-shaped part (31) is a rounded chamfer.

5. The easily disassembled rebar cage fixing device as described in claim 2, characterized in that, The U-shaped part (31) and the vertical part (32) are fixed together by welding.

6. The easily disassembled rebar cage fixing device as described in claim 2, characterized in that, The U-shaped part (31) and the vertical part (32) are an integral structure.

7. The easily detachable rebar cage fixing device as described in claim 1, characterized in that, The multiple stiffening plates (5) also include a second stiffening plate (52), which is located on the outside of the cylinder opening and is set between the U-shaped part (31) of the two hanging plates (3). The second stiffening plate (52) is set vertically and is perpendicular to the U-shaped part (31) of the two hanging plates (3).

8. The easily detachable rebar cage fixing device as described in claim 7, characterized in that, The multiple stiffening plates (5) also include two third stiffening plates (53), which are located inside the cylinder opening and are set between the vertical parts (32) of the two hanging plates (3). The third stiffening plates (53) are set vertically and are perpendicular to the vertical parts (32) of the two hanging plates (3). The stiffening plates (5) with lifting rod holes (511) are set on the top of the two third stiffening plates (53).

9. The easily detachable rebar cage fixing device as described in claim 1, characterized in that, The stiffening plate (5) and the hanging plate (3) are fixed together by welding.

10. The easily detachable rebar cage fixing device as described in claim 1, characterized in that, The surfaces of the hanging plate (3) and the stiffening plate (5) are coated with an anti-rust coating.

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