A concrete control tower

Abstract

This application relates to the technical field of construction equipment. A concrete control tower includes a base, which is elliptical in shape, with the top surfaces at both ends of the major axis lower than the top surface at the middle, and the bottom surfaces at both ends of the major axis higher than the bottom surface at the middle. A floor slab thickness control platform includes a support member and a platform body fixed to the top of the support member. The support member includes a support plate fixed to the top surface at the middle of the base along the minor axis and extending vertically, and a reinforcing plate fixed to the middle of the first side of the support plate along the major axis of the base. The reinforcing plate extends vertically, and its bottom end is flush with the support plate on one side, while the other side of its bottom end is fixed to the top surface of the base. A first reinforcing bar placement plate is fixed to the top surface of the base, located on the second side of the support plate, and parallel to the support plate. A second reinforcing bar placement plate is fixed to the second side of the support plate, located in the middle of the support plate. This application improves the stability of the concrete control tower and reduces the risk of water seepage.

Description

Technical Field

[0001] This application relates to the field of building construction equipment technology, and in particular to a concrete control tower. Background Technology

[0002] To improve the seismic performance of existing building projects, most adopt cast-in-place concrete structures. The construction process for floor slabs in this type of structure is as follows: first, carpenters erect formwork; second, steelworkers tie the reinforcing bars; and third, concrete is poured. Since the floor slab concrete is poured on-site, controlling its flatness and thickness during construction is crucial, directly affecting the overall structural performance and quality of the project. If the thickness does not meet design requirements, it will affect the structural integrity. If it exceeds the design requirements, it will waste concrete materials, reduce the structural floor height, and cause problems for secondary finishing. Therefore, floor slab thickness controllers are commonly used during the construction of the main floor slab to control the flatness and thickness of the concrete.

[0003] Currently, floor slab thickness controllers generally use stirrups to control the spacing between the upper and lower layers of steel reinforcement in floor slabs. Stirrups are a construction term; their shape resembles a stool, hence the common name "stirrup," also known as a support bar. Traditional stirrups are N-shaped and placed between the upper and lower layers of floor slab reinforcement to fix the upper layer of reinforcement. During use, the surface layer reinforcement is tied to the stirrup with wire. However, stirrups themselves have poor stability; during construction, their position is easily altered due to foot traffic and vibrations from concrete pouring. Summary of the Invention

[0004] To improve the stability of the reinforced concrete support structure when workers step on it or pour concrete, this application provides a concrete control tower.

[0005] The concrete control tower provided in this application adopts the following technical solution:

[0006] A concrete control tower, comprising:

[0007] The base is elliptical in shape, with the top surfaces at both ends of the long axis being lower than the top surface at the middle, and the bottom surfaces at both ends of the long axis being higher than the bottom surface at the middle. The top and bottom surfaces of the base have a smooth transition.

[0008] A floor slab thickness control platform includes a support member and a platform body fixed to the top of the support member. The support member includes a support plate fixed to the top surface of the middle part of the base along the short axis of the base and extending vertically, and a reinforcing plate fixed to the middle part of the first side of the support plate along the long axis of the base. The reinforcing plate extends vertically, and the bottom end of the reinforcing plate is flush with the support plate on one side connected to the support plate. The other side of the bottom end of the reinforcing plate is fixed to the top surface of the base.

[0009] The first reinforcing bar placement plate is fixed to the top surface of the base, located on the second side of the support plate, and parallel to the support plate;

[0010] The second reinforcing bar placement plate is fixed to the second side of the support plate and is located in the middle of the support plate.

[0011] By adopting the above technical solution, before concrete pouring, the concrete control tower of this application is first arranged. That is, according to a pre-set density, the concrete control tower is directly placed on the bottom structure, with the lower layer of reinforcing bars placed in the first reinforcing bar placement plate and the upper layer of reinforcing bars placed in the second reinforcing bar placement plate. Then, concrete pouring is carried out. Pouring is stopped when the concrete just covers the platform body, and the surface is leveled. During the leveling process, the platform body serves as a reference surface to control the concrete thickness, ensuring that the thickness of the floor slab is consistent and uniform at all locations.

[0012] The base is configured such that the height of the bottom surfaces at both ends of the long axis is higher than the height of the middle bottom surface. Simultaneously, the lower layer of reinforcing steel exerts a greater force on the concrete control tower, giving the base a "self-sustaining" design. Furthermore, the concrete in the base area experiences low flow resistance on both sides of the first reinforcing steel placement plate. This allows the concrete control tower to quickly regain its balance during concrete pouring or when workers are smoothing the surface, enabling the platform to rapidly return to a level position. This design allows the base to maintain its balance through lateral swaying, reducing the risk of positional changes and improving stability. Moreover, during concrete pouring, the concrete can slightly bury the platform (e.g., the concrete thickness above the platform can not exceed 1 cm). Slightly burying the platform reduces the risk of water seepage at the concrete control tower location and also reduces the need for features such as floating balls.

[0013] Preferably, the second reinforcing bar placement plate extends along the short axis of the base, and the free side of the second reinforcing bar placement plate away from the support plate is curved toward the platform body;

[0014] The first rebar placement plate is curved toward the platform body from its free side away from the support plate, and the curvature of the free side of the first rebar placement plate is greater than the curvature of the free side of the second rebar placement plate.

[0015] By adopting the above technical solution, through the method of "tight clamping" of the lower layer and "loose clamping" of the upper layer, on the one hand, the lower layer of reinforcing bars is seamlessly clamped in the first reinforcing bar placement plate, and the strength of the lower layer of reinforcing bars provides a certain limiting effect on the base, further reducing the probability of displacement due to the shaking of the base; on the other hand, even if the upper layer of reinforcing bars shakes slightly when pouring concrete or when workers are smoothing and finishing the surface, the upper layer of reinforcing bars and the concrete control tower can be quickly restored to a stable state through the cooperation of the upper layer of reinforcing bars, the lower layer of reinforcing bars and the base, thereby improving the stability of the concrete control tower base and the upper layer of reinforcing bars of this application.

[0016] Preferably, the free side of the second reinforcing bar placement plate is farther away from the support plate relative to the free side of the first reinforcing bar placement plate.

[0017] By adopting the above technical solution, the upper steel bars and concrete control tower can be quickly restored to a stable state through the combined force of the upper and lower steel bars.

[0018] Preferably, the height of the support plate gradually decreases from the middle of the bottom end to both ends, and the height of the middle part is higher than the top surface of the base.

[0019] Along the direction from the support plate to the base, the height of the bottom end of the reinforcing plate gradually decreases.

[0020] By adopting the above technical solution, the bottom center of the support plate is arched, and the apex of the arch is higher than the top surface of the base, which reduces the flow resistance of concrete. The bottom of the reinforcing plate gradually decreases in height from the side close to the support plate to the side far away from the support plate. On the one hand, this increases the support strength of the bottom of the reinforcing plate, and on the other hand, it further increases the space for concrete injection, so that the base can achieve higher stability.

[0021] Preferably, a waterproof permeation ring is fixed on the support plate along the long axis of the base, and the waterproof permeation ring does not protrude from the free side of the first steel bar placement plate on the side located on the second side of the support plate.

[0022] By adopting the above technical solution, the setting of the waterproof penetration ring can effectively reduce water penetration into the floor slab. At the same time, while meeting the waterproof performance requirements of the waterproof penetration ring, the area of ​​the waterproof penetration ring is reduced, which reduces the resistance of the waterproof penetration ring when the base shakes, and the overall force is more balanced.

[0023] Preferably, the waterproof permeation ring is arc-shaped on the side located on the second side of the support plate.

[0024] By adopting the above technical solution, the arc-shaped design can further reduce the resistance of the waterproof penetration ring to the base's wobbling.

[0025] Preferably, along the long axis of the base, the waterproof permeation ring does not protrude from the base on the side located on the first side of the support plate.

[0026] By adopting the above technical solution, the concrete control tower is a trapezoid with a narrow top and a wide bottom. The waterproof and seepage-proof ring transitions in width in the middle, making the concrete control tower less resistant and more stable.

[0027] Preferably, a first auxiliary reinforcing plate is provided between the base and the waterproof ring, and a second auxiliary reinforcing plate is provided between the platform body and the waterproof ring. Both the first and second auxiliary reinforcing plates are connected to the reinforcing plate and the support plate.

[0028] By adopting the above technical solution, the first auxiliary reinforcing plate and the second auxiliary reinforcing plate can increase the support strength of the reinforcing plate and the support plate. The first auxiliary reinforcing plate and the second auxiliary reinforcing plate are set along the height direction of the support plate, which improves the uniformity of force distribution at each position.

[0029] Preferably, the height of the second auxiliary reinforcing plate is flush with the height of the second reinforcing bar placement plate.

[0030] By adopting the above technical solution, the auxiliary reinforcing plate can increase the support strength of both the support plate and the reinforcing plate, as well as the support strength of the second reinforcing bar placement plate.

[0031] Preferably, the base, the floor slab thickness control platform, the first rebar placement plate, and the second rebar placement plate are an integral injection-molded structure.

[0032] By adopting the above technical solution, it is easier to put the concrete control tower of this application into production and reduce production costs; at the same time, it can make the concrete control tower of this application lighter and minimize the impact on the overall strength of the floor slab.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. In this application, by setting an elliptical ring "tumbler" base, it is easy to maintain balance by its own left and right swaying when vibrating concrete. It can be flexibly adjusted according to the force, reducing interference with the upper and lower layers of reinforcing bars and improving the stability of the concrete control tower. The separate setting of a first reinforcing bar placement plate for the lower layer of reinforcing bars and a second reinforcing bar placement plate for the upper layer of reinforcing bars avoids the binding and fixing of the upper and lower layers of reinforcing bars, making the installation faster and more convenient, and further ensuring the installation stability of the upper and lower layers of reinforcing bars.

[0035] 2. By setting the bottom center of the support plate in an arched shape, the resistance to concrete flow is reduced, while the space for concrete injection is increased, further enhancing the support stability of the base.

[0036] 3. By setting up waterproof penetration rings, water penetration into the floor slab can be effectively reduced, the coverage area of ​​the waterproof penetration rings can be controlled, the resistance encountered when the base shakes is reduced, and the overall stress is more balanced. Attached Figure Description

[0037] Figure 1 This is an overall schematic diagram in the side view of this application;

[0038] Figure 2 This is an overall schematic diagram of the application in its rear view.

[0039] Explanation of reference numerals in the attached drawings: 1. Base; 2. Floor slab thickness control platform; 21. Support component; 211. Support plate; 212. Reinforcing plate; 213. First auxiliary reinforcing plate; 214. Second auxiliary reinforcing plate; 22. Platform body; 3. First rebar placement plate; 31. First clamping space; 4. Second rebar placement plate; 41. Second clamping space; 5. Waterproof penetration ring. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0041] This application discloses a concrete control tower, referring to... Figure 1 and Figure 2 It includes a base 1 for placing on the bottom surface of the structure, a floor slab thickness control platform 2 fixed on the base 1, a first rebar placement plate 3 for placing the lower layer of rebar, and a second rebar placement plate 4 for placing the upper layer of rebar.

[0042] The base 1 is an elliptical ring shape. The top and bottom surfaces of the base 1 have inward-facing flanges to enhance its strength. The height of the top surfaces at both ends of the long axis of the base 1 is lower than the height of the middle top surface, while the height of the bottom surfaces at both ends of the long axis of the base 1 is higher than the height of the middle bottom surface. The middle part of the bottom surface is flat to allow it to be placed on a floor slab. The flat portion of the bottom surface can be located between the support plate 211 and the arc-shaped sidewall of the first reinforcing bar placement plate 3, as described below. Furthermore, the top surface of the base 1 has a smooth circumferential transition, and the bottom surface of the base 1 also has a smooth circumferential transition.

[0043] The floor slab thickness control platform 2 includes a support member 21 vertically fixed to the base 1 and a platform body 22 horizontally fixed to the top of the support member 21. The support member 21 includes a support plate 211 fixed to the top surface of the middle part of the base 1 along the short axis and extending vertically, and a reinforcing plate 212 fixed to the middle of the first side of the support plate 211 along the long axis of the base 1. The reinforcing plate 212 extends vertically, and its bottom end, connected to the support plate 211, is flush with the support plate 211; the other bottom end of the reinforcing plate 212 is fixed to the top surface of the base 1. The reinforcing plate 212 strengthens the support plate 211, providing better support strength. The platform body 22 is a flat plate parallel to the bottom surface of the structure, specifically a circular flat plate.

[0044] Before concrete pouring, the concrete control tower of this application is placed on the bottom surface of the structure. The lower layer of reinforcing bars is placed in the first reinforcing bar placement plate 3, and the upper layer of reinforcing bars is placed in the second reinforcing bar placement plate 4. Concrete pouring then commences, stopping when the concrete just completely submerges the platform body 22, ensuring a consistent and uniform thickness of the cast-in-place floor slab at all locations. After pouring, workers vibrate the concrete and smooth the surface.

[0045] To minimize the impact on the position and shape of the concrete control tower during concrete vibration or worker finishing, the base of this application is elliptical, with the top surfaces at both ends of the major axis lower than the middle top surface, and the bottom surfaces at both ends of the major axis higher than the middle bottom surface. Furthermore, the top and bottom surfaces of the base 1 have smooth transitions. This creates a gently transitioning U-shape on the bottom surface of the base 1, giving it a "roly-poly" design when viewed from the side. This allows the concrete control tower to remain vertically stable on the structural base without the need for additional fixing structures. Simultaneously, during concrete pouring or worker finishing, the base 1 can maintain its balance by swaying left and right, reducing the probability of displacement or even detachment from the upper and lower reinforcing bars.

[0046] Furthermore, the hollow interior of base 1 forms a large chassis structure. As concrete is poured, it enters and fills the interior of base 1, further increasing the support stability of the concrete control tower of this application. This reduces the probability of displacement during vibration or when workers step on it to smooth the surface, thus improving the support stability of the concrete control tower of this application. Simultaneously, because the top surface height at both ends of the long axis of base 1 is lower than the top surface height in the middle, it is easier for concrete to enter the interior of base 1 from both ends of the long axis, increasing the speed at which concrete enters base 1.

[0047] The height of the support plate 211 gradually decreases from the middle of its bottom end to both ends, with the middle section being higher than the top surface of the base 1. This creates an arched shape at the middle of the bottom end of the support plate 211, with the apex of the arch higher than the top surface of the base 1. This increases the stability of the bottom end of the support plate 211 and, while ensuring support stability, expands the space for concrete injection, allowing for a larger volume of concrete injected into the base 1, thus making the structure of the base 1 more stable. Furthermore, along the direction from the support plate 211 to the base 1, the height of the bottom end of the reinforcing plate 212 gradually decreases. This further increases the space for concrete injection, making the structure of the base 1 even more stable.

[0048] To further improve the supporting stability of the concrete control tower of this application, the reinforcing plate 212 is trapezoidal with a narrow top and a wide bottom, and the side of the platform body 22 does not protrude from the base 1. This makes the overall concrete control tower have a trapezoidal structure with a narrow top and a wide bottom. The bottom is solid while the top is compact, resulting in higher stability and reducing the volume of the concrete control tower, thus minimizing the impact on the strength of the cast-in-place floor slab.

[0049] The first rebar placement plate 3 is fixed to the top surface of the base 1, located on the second side of the support plate 211 and parallel to the support plate 211. The second rebar placement plate 4 is fixed to the second side of the support plate 211, located in the middle of the support plate 211. The first rebar placement plate 3 and the second rebar placement plate 4 respectively form clamping spaces for holding the lower and upper rebars. By setting independent fixing positions for the upper and lower rebars, the cumbersome operation of binding the upper and lower rebars with stirrups using steel wires in the traditional method is avoided, making the operation simpler and the construction faster.

[0050] Specifically, the second reinforcing bar placement plate 4 extends along the short axis of the base 1, and the free side of the second reinforcing bar placement plate 4 away from the support plate 211 is curved towards the platform body 22, forming a second clamping space 41 between the free side of the second reinforcing bar placement plate 4 and the support plate 211 for securing the upper reinforcing bar. The first reinforcing bar placement plate 3 is also curved towards the platform body 22 with its free side away from the support plate 211. A first clamping space 31 between the free side of the first reinforcing bar placement plate 3 and the support plate 211 for securing the lower reinforcing bar. Furthermore, this application configures the curvature of the free side of the first reinforcing bar placement plate 3 to be greater than the curvature of the free side of the second reinforcing bar placement plate 4. On the one hand, by tightly clamping the lower layer of reinforcing bars in the first clamping space 31, the strength of the lower layer of reinforcing bars plays a certain limiting role on the base 1, further reducing the probability of displacement of the concrete control tower during vibration or worker stepping on it, and improving the connection stability with the lower layer of reinforcing bars; on the other hand, by loosely clamping the upper layer of reinforcing bars in the second clamping space 41, a certain gap exists between the upper layer of reinforcing bars and the side wall of the second reinforcing bar placement plate 4. When workers step on the upper layer of reinforcing bars, a certain amount of swaying allowance is left between the upper layer of reinforcing bars and the concrete control tower, minimizing the interference caused by the swaying of the upper layer of reinforcing bars on the concrete control tower, and facilitating the cast-in-place floor slab to obtain better concrete flatness and uniformity.

[0051] Furthermore, relative to the free side of the first reinforcing bar placement plate 3, the free side of the second reinforcing bar placement plate 4 is farther away from the support plate 211. That is, relative to the side of the first reinforcing bar placement plate 3 that is farther away from the support plate 211, the side of the second reinforcing bar placement plate 4 that is farther away from the support plate 211 is further from the support plate 211. The concrete control tower of this application also includes a waterproof penetration ring 5 for reducing water penetration into the floor slab. The waterproof penetration ring 5 is fixed to the support plate 211, and the side of the waterproof penetration ring 5 located on the second side of the support plate 211 does not protrude beyond the free side of the first reinforcing bar placement plate 3. The waterproof penetration ring 5 achieves a width transition in the middle of the support plate 211, maintaining the overall structure of the concrete control tower of this application, which is wider at the bottom and narrower at the top. At the same time, by reducing the coverage area of ​​the waterproof penetration ring 5, the overall weight and volume of the concrete control tower of this application are reduced, the resistance encountered when the base 1 shakes is reduced, and the overall force is more balanced. In order to maintain the balance of the concrete control tower as much as possible, the waterproof penetration ring 5 should be placed as close as possible to the base 1.

[0052] The waterproof permeation ring 5 has an arc-shaped side on the second side of the support plate 211. Furthermore, the side of the waterproof permeation ring 5 is smooth to further reduce the reverse resistance of the waterproof permeation ring 5.

[0053] To increase the support strength of the support member 21, a first auxiliary reinforcing plate 213 is provided between the base 1 and the waterproof ring 5, and a second auxiliary reinforcing plate 214 is provided between the platform body 22 and the waterproof ring 5. Both the first auxiliary reinforcing plate 213 and the second auxiliary reinforcing plate 214 are connected to the reinforcing plate 212 and the support plate 211. The number of the first auxiliary reinforcing plate 213 and the second auxiliary reinforcing plate 214 can be one or more, and the number of the first auxiliary reinforcing plate 213 and the second auxiliary reinforcing plate 214 can be the same or different. When the number is different, the number of first auxiliary reinforcing plates 213 should be greater than the number of second auxiliary reinforcing plates 214. This application only uses the example of having one first auxiliary reinforcing plate 213 and one second auxiliary reinforcing plate 214 for illustration.

[0054] Furthermore, the second auxiliary reinforcing plate 214 is flush with the height of the second reinforcing bar placement plate 4. This allows the second auxiliary reinforcing plate 214 to increase the support strength of both the support plate 211 and the reinforcing plate 212, as well as the support strength of the second reinforcing bar placement plate 4.

[0055] The concrete control tower should be made of lightweight materials. This application uses an example of an integrated injection-molded structure comprising the base 1, the floor slab thickness control platform 2, the first reinforcing bar placement plate 3, and the second reinforcing bar placement plate 4, to facilitate rapid production.

[0056] The implementation principle of a concrete control tower according to this application embodiment is as follows: Before concrete pouring, the concrete control tower is placed directly on the bottom surface of the structure according to a pre-set density. The lower layer of reinforcing bars is placed in the first reinforcing bar placement plate 3, and the upper layer of reinforcing bars is placed in the second reinforcing bar placement plate 4. Concrete pouring then proceeds, stopping when the concrete just covers the platform body 22, ensuring uniform thickness at all locations of the floor slab. As the concrete is poured, it gradually enters the elliptical ring base 1, gradually increasing its stability. When the concrete is vibrated or smoothed, the vibrating concrete control tower, thanks to the "tumbler" design of the base 1, swings left and right to neutralize the vibration, helping the concrete control tower quickly return to its balanced state and reducing the probability of displacement. By allowing a certain amount of swaying allowance between the second reinforcing bar placement plate 4 and the upper reinforcing bars, the disturbance to the concrete control tower caused by the swaying of the upper reinforcing bars is reduced when workers step on them to place the tower. Even if the upper layer of reinforcing bars experiences slight swaying, the upper layer of reinforcing bars, the lower layer of reinforcing bars, and the base 1 can work together to quickly restore the upper layer of reinforcing bars and the concrete control tower to a stable state, thereby improving the stability of the concrete control tower base 1 and the upper layer of reinforcing bars in this application.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A concrete control tower, characterized in that: include: The base (1) is an elliptical ring. The height of the top surface at both ends of the long axis is lower than the height of the top surface in the middle, and the height of the bottom surface at both ends of the long axis is higher than the height of the bottom surface in the middle. The top surface and bottom surface of the base (1) are smoothly transitioned. The floor slab thickness control platform (2) includes a support member (21) and a platform body (22) fixed to the top of the support member (21). The support member (21) includes a support plate (211) fixed to the top surface of the middle part of the base (1) along the short axis direction and extending vertically, and a reinforcing plate (212) fixed to the middle part of the first side of the support plate (211) along the long axis direction of the base (1). The reinforcing plate (212) extends vertically, and the bottom end of the reinforcing plate (212) is flush with the support plate (211) on one side connected to the support plate (211). The other side of the bottom end of the reinforcing plate (212) is fixed to the top surface of the base (1). The first steel bar placement plate (3) is fixed on the top surface of the base (1), located on the second side of the support plate (211), and parallel to the support plate (211); The second reinforcing bar placement plate (4) is fixed on the second side of the support plate (211) and is located in the middle of the support plate (211); The second reinforcing bar placement plate (4) extends along the short axis of the base (1), and the free side of the second reinforcing bar placement plate (4) away from the support plate (211) is curved toward the platform body (22); The first reinforcing bar placement plate (3) is curved toward the platform body (22) from the free side away from the support plate (211), and the curvature of the free side of the first reinforcing bar placement plate (3) is greater than the curvature of the free side of the second reinforcing bar placement plate (4). The height of the support plate (211) gradually decreases from the middle of the bottom end to both ends, and the height of the middle part is higher than the top surface of the base (1); Along the direction from the support plate (211) to the base (1), the height of the bottom end of the reinforcing plate (212) gradually decreases.

2. The concrete control tower according to claim 1, characterized in that: The free side of the second reinforcing bar placement plate (4) is away from the support plate (211) relative to the free side of the first reinforcing bar placement plate (3).

3. The concrete control tower according to claim 1, characterized in that: A waterproof penetration ring (5) is fixed on the support plate (211). Along the long axis of the base (1), the waterproof penetration ring (5) does not protrude from the free side of the first steel bar placement plate (3) on the side located on the second side of the support plate (211).

4. The concrete control tower according to claim 3, characterized in that: The waterproof permeation ring (5) is arc-shaped on the side located on the second side of the support plate (211).

5. The concrete control tower according to claim 4, characterized in that: Along the long axis of the base (1), the waterproof permeation ring (5) does not protrude from the base (1) on the side located on the first side of the support plate (211).

6. The concrete control tower according to claim 3, characterized in that: A first auxiliary reinforcing plate (213) is provided between the base (1) and the waterproof penetration ring (5), and a second auxiliary reinforcing plate (214) is provided between the platform body (22) and the waterproof penetration ring (5). The first auxiliary reinforcing plate (213) and the second auxiliary reinforcing plate (214) are both connected to the reinforcing plate (212) and the support plate (211).

7. The concrete control tower according to claim 6, characterized in that: The height of the second auxiliary reinforcing plate (214) is flush with the height of the second reinforcing bar placement plate (4).

8. The concrete control tower according to any one of claims 1-3, characterized in that: The base (1), the floor slab thickness control platform (2), the first steel bar placement plate (3), and the second steel bar placement plate (4) are an integral injection-molded structure.

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