A protective layer thickness regulator for a steel reinforcement cage

Abstract

The utility model belongs to the field of building construction technology, specifically disclose a kind of for the thickness regulator of protective layer of steel reinforcement framework, including arc connecting piece, at least one fixed nut is equipped on the arc connecting piece, adjusting device is equipped on the fixed nut;The regulator includes threaded steel and locking nut of screw thread connection, the threaded steel is located on the fixed nut.The utility model provides a kind of for the thickness regulator of protective layer of steel reinforcement framework, by the fixed pad or fixture of traditional replacement of accurately adjustable screw thread transmission structure, utilize the characteristics of high transmission accuracy and good self-locking of screw pair, solve the problem that traditional method cannot realize protective layer thickness quantitative adjustment, easy displacement damage and mostly for one-time use.Further, the regulator whole adopts metal component and realizes stable positioning by mechanical locking mode, improves the reliability and quality control level of construction process, to realize the high precision, repeatable adjustment of protective layer thickness.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a protective layer thickness adjuster for steel reinforcement cages. Background Technology

[0002] In reinforced concrete structure construction, the thickness of the concrete cover is a key indicator for ensuring the structure's durability, fire resistance, and load-bearing capacity. Traditional methods for controlling the cover thickness often involve using precast concrete blocks or plastic clamps.

[0003] However, these traditional methods have significant drawbacks: concrete spacers are fragile, have low strength, and have a small contact area with the formwork, making them prone to displacement during concrete pouring; plastic clamps are prone to aging and lack rigidity, easily deforming and breaking during construction foot traffic or vibration, leading to uncontrolled protective layer thickness. Both methods limit the minimum spacing of the concrete protective layer but cannot solve the problem of exceeding the limit. Furthermore, neither method can achieve precise quantitative adjustment, and they are usually for single use, resulting in poor economic and environmental performance.

[0004] In summary, existing technologies for adjusting the protective layer thickness cannot achieve quantitative adjustment and are typically for single use, resulting in poor economic and environmental performance. Utility Model Content

[0005] This invention provides a protective layer thickness adjuster for steel reinforcement cages, which solves the problems of existing protective layer thickness adjustment methods that cannot achieve quantitative adjustment and are usually for single use, resulting in poor economic and environmental performance.

[0006] A protective layer thickness adjuster for a steel reinforcement cage includes an arc-shaped connector, wherein at least one fixing nut is provided on the arc-shaped connector, and an adjuster is provided on the fixing nut; The adjuster includes a threaded steel bar and a locking nut with threaded connection, the threaded steel bar being disposed on the locking nut.

[0007] The present invention provides a protective layer thickness adjuster for steel reinforcement cages, which, compared with the prior art, has the following beneficial effects, but is not limited to: In this protective layer thickness adjuster for reinforcing bar cages, the arc-shaped connector can be understood as a component that directly connects to the reinforcing bar cage and provides a stable anchor point. The fixing nut serves as the fixed support point for the entire adjustment system. The threaded steel bar, as the core transmission and adjustment component, can be installed with the arc-shaped connector through the engagement of its external thread with the fixing nut. The locking nut is used to mechanically lock the adjustment in place. The threaded steel bar is precision-rolled to ensure the structural strength and durability of the adjuster.

[0008] This protective layer thickness adjuster for rebar cages replaces traditional fixed blocks or clamps with a precisely adjustable threaded transmission structure. Utilizing the high precision and self-locking properties of the threaded transmission, it solves the problems of traditional methods, such as the inability to quantitatively adjust the protective layer thickness, susceptibility to displacement and damage, and the fact that they are mostly for single use. Furthermore, the adjuster is constructed entirely of metal components and achieves stable positioning through mechanical locking, improving the reliability and quality control of the construction process, thus enabling high-precision and repeatable adjustment of the protective layer thickness.

[0009] Furthermore, a retaining plate is fitted around the outside of the threaded steel bar.

[0010] Furthermore, the number of the card plates is not less than one.

[0011] Furthermore, the cross-sectional shape of the card plate is rectangular or circular.

[0012] Furthermore, the outer surface of the card plate is provided with a protective layer.

[0013] Furthermore, the clamping plate is U-shaped, and the open end of the clamping plate is fitted onto the outside of the threaded steel bar.

[0014] Furthermore, the fixing nut is fixed to the arc-shaped connector by welding.

[0015] Furthermore, the arc-shaped connector is U-shaped, C-shaped, V-shaped, or semi-circular.

[0016] Furthermore, the outer surfaces of the arc-shaped connector, the fixing nut, the threaded steel, and the locking nut are all provided with a rust-proof and corrosion-resistant coating.

[0017] Furthermore, the rebar is made of Q235 steel. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 A structural front view of a protective layer thickness adjuster for a steel reinforcement cage provided by this utility model; Figure 2 A top view of the structure of a protective layer thickness adjuster for a steel reinforcement cage provided by this utility model; Figure 3 A schematic diagram of the structure of a clamping plate for adjusting the protective layer thickness of a reinforcing bar cage, provided by this utility model; Figure 4 A schematic diagram of another embodiment of this utility model.

[0019] Explanation of reference numerals in the attached figures: 1. Arc-shaped connector; 2. Threaded steel bar; 3. Fixing nut; 4. Clamping plate; 5. Locking nut; 100. Rebar cage; 200. Main reinforcement bar; 300. Formwork. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings showing multiple embodiments according to this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0021] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," etc., in the description, claims, and accompanying drawings of this application are open-ended terms. Therefore, "comprising," "including," or "having" refers to, for example, a method or apparatus having one or more steps or elements, but is not limited to having only these one or more elements. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] It should be emphasized that when the term "comprising / including" is used in this specification, it is used to explicitly indicate the presence of the stated feature, integer, step, or component, but does not exclude the presence or addition of one or more other features, integers, steps, parts, or groups of features, integers, steps, or parts.

[0025] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, B and / or C can represent: B existing alone, B and C existing simultaneously, or C existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0026] In reinforced concrete structure construction, the thickness of the concrete cover refers to the thickness of the protective layer formed between the reinforcing steel cage and the steel formwork after concrete pouring. The thickness of the concrete cover is a key indicator for ensuring the structure's durability, fire resistance, and load-bearing capacity. If the cover thickness is too small, the reinforcing steel is easily corroded by the external environment and rusts, thus affecting the overall durability and safety of the structure. If the cover thickness is too large, it weakens the bond between the reinforcing steel and the concrete, reducing the structure's load-bearing capacity. Therefore, accurately controlling the thickness of the concrete cover is crucial for ensuring the quality of reinforced concrete structures.

[0027] Traditional methods for controlling the thickness of the protective layer often employ precast concrete spacers or plastic clamps. However, these methods have significant drawbacks: concrete spacers are fragile, have low strength, and have a small contact area with the formwork, making them prone to displacement during concrete pouring; plastic clamps are prone to aging and lack rigidity, easily deforming and breaking during construction or vibration, leading to uncontrolled protective layer thickness. Both methods limit the minimum spacing of the concrete protective layer but cannot solve the problem of exceeding the limit. Furthermore, neither method allows for precise quantitative adjustment and is typically for single use, resulting in poor economic and environmental performance.

[0028] like Figure 1 As shown in the figure, the present invention provides a protective layer thickness adjuster for a steel reinforcement cage, which is disposed between the steel reinforcement cage and the steel formwork. It includes an arc-shaped connector 1, at least one fixing nut 3 on the arc-shaped connector 1, and an adjuster on the fixing nut 3. The adjuster includes a threaded steel bar 2 and a locking nut 5 with threaded connection, the threaded steel bar 2 being mounted on the fixing nut 3.

[0029] In practical applications, the arc-shaped connector 1 can be understood as a component that directly connects to the reinforcing steel cage and provides a stable anchor point. Its shape can be designed as a semi-circle or other arc-shaped structure suitable for fitting the reinforcing bars (generally main bars) on the reinforcing steel cage. The fixing nut 3 serves as the fixed support point for the entire adjustment system, and its connection to the arc-shaped connector can be achieved through welding, riveting, or other reliable fixing methods. The threaded steel bar 2, as the core transmission and adjustment component, can be installed with the arc-shaped connector 1 through the cooperation of its external thread with the fixing nut 3. The locking nut 5 is used to achieve mechanical locking after adjustment. Specifically, it can be implemented using a conventional hexagonal nut, flange nut, or other nut form with anti-loosening function to adapt to different locking requirements. The threaded steel bar 2 is a precision-rolled threaded steel bar to ensure the structural strength and durability of the regulator.

[0030] The innovation of this application lies in replacing the traditional fixed pads or clamps with a precisely adjustable threaded transmission structure. Utilizing the high precision and self-locking properties of the threaded transmission pair, it solves the problems of traditional methods, such as the inability to quantitatively adjust the protective layer thickness, susceptibility to displacement and damage, and the fact that they are mostly for single use. Furthermore, the regulator is entirely made of metal components and achieves stable positioning through mechanical locking, improving the reliability and quality control level of the construction process, thereby realizing high-precision and repeatable adjustment of the protective layer thickness.

[0031] The working principle of this application embodiment is as follows: The arc-shaped connector 1 serves as the installation base, its arc-shaped inner surface stably fitting and hanging on the main reinforcement of the steel reinforcement cage, providing a reliable installation base for the entire adjuster. The fixing nut 3 is fixed to the arc-shaped connector 1 on one side near its end, and is located on the outside of the arc-shaped connector 1, serving as a fixed support for the threaded drive. The threaded steel bar 2 passes through the steel formwork and is threadedly connected to the fixing nut 3, which is used to fix the position of the precision-rolled threaded steel bar 2. The locking nut 5 cooperates with the threaded steel bar 2 and is tightened after the protective layer thickness is adjusted to the correct position, providing mechanical locking force to prevent changes in the adjustment dimensions due to vibration or impact during concrete pouring and compaction, ensuring the protective layer thickness remains stable during construction.

[0032] Furthermore, fine-tuning can be performed by rotating the locking nut 5, which, in conjunction with the screw-in depth of the threaded steel bar 2, enables stepless, precise, and quantitative adjustment of the distance between the steel reinforcement cage and the steel formwork. This adjustment process directly determines the final thickness of the concrete protective layer, effectively avoiding quality problems such as insufficient or excessive protective layer thickness caused by the inability to quantitatively adjust the thickness in traditional methods.

[0033] Specifically, this regulator, through the coordinated operation of the threaded steel bar 2 and the locking nut 5, replaces the traditional concrete block or plastic clamp, significantly improving adjustment accuracy and structural stability. Furthermore, its detachable and reusable nature reduces construction costs and material waste. The overall technical solution, through the coordinated operation of these components, achieves high-precision control and stable maintenance of the protective layer thickness, while simultaneously solving the problems of traditional methods such as lack of adjustment function, susceptibility to damage, and poor economic and environmental performance.

[0034] like Figures 1 to 3 As shown, in some embodiments of this utility model, the number of fixing nuts 3 on the arc-shaped connector 1 is preferably one.

[0035] like Figures 1 to 3 As shown, in some embodiments of this utility model, a retaining plate 4 is provided on the outside of the threaded steel bar 2.

[0036] Specifically, the clamping plate 4 refers to a component that can directly contact the template and distribute pressure. It can be implemented using a rectangular, circular, or other regular-shaped plate structure. In practical applications, the clamping plate 4 has a through hole in the middle, which can be fitted onto the outside of the threaded steel bar 2 and can move axially on the threaded steel bar 2. The clamping plate 4 can be made of metal to ensure sufficient strength and durability.

[0037] In detail, the introduction of clamping plate 4 provides a stable template-side support point for the entire adjuster, solving the problem of stress concentration or template damage that may occur when the end of the threaded steel bar is in direct contact with the template. Clamping plate 4 is sleeved on the outside of the threaded steel bar 2, and its position can be adjusted along the axial direction of the threaded steel bar according to the required protective layer thickness. During adjustment, one side of clamping plate 4 contacts the inner surface of the template, while the other side is limited and fixed by locking nut 5.

[0038] This design not only avoids localized deformation or damage to the formwork caused by point contact, but also increases the contact area to maintain a more stable posture of the adjuster during concrete pouring. At the same time, the presence of the clamping plate 4 makes the control of the protective layer thickness more intuitive and precise; construction workers can quickly determine whether the adjustment is in place by observing the fit between the clamping plate and the formwork.

[0039] Furthermore, the combined use of clamping plate 4 with threaded steel bar 2 and locking nut 5 allows the entire regulator system to adapt to templates of different thicknesses and types. This not only improves the applicability of the regulator but also extends the service life of the template by protecting its surface, demonstrating the superiority of this technical solution in construction quality control. When multiple clamping plates are installed, the stability and adaptability of the system under complex working conditions can be further enhanced.

[0040] like Figures 1 to 3 As shown, in some embodiments of this utility model, the number of card plates 4 is not less than 1.

[0041] Specifically, the number of clamping plates 4 can be adjusted according to actual construction needs and the characteristics of the formwork structure. When a single clamping plate is set, it is usually placed near the critical stress position inside the formwork; when multiple clamping plates are set, they can be arranged at intervals along the axial direction of the threaded steel bar 2 to form a multi-level support structure.

[0042] In detail, the configurable design of the number of clamps significantly improves the adaptability of the regulator to different construction conditions. Under normal construction conditions, a single clamp can meet the actual needs, resulting in a simple structure and convenient installation. However, in special conditions, such as adjusting thick protective layers, constructing curved formwork, or situations requiring additional stability, multiple clamps can form a more robust support system.

[0043] This multi-plate configuration effectively disperses the lateral pressure generated during concrete pouring by increasing the number of support points, preventing formwork deformation or adjuster misalignment caused by excessive stress at a single point. Simultaneously, the synergistic effect of multiple plates ensures that the rebar remains perfectly perpendicular to the formwork, further improving the accuracy of protective layer thickness control.

[0044] Furthermore, the scalability of the number of clamps allows this regulator to flexibly adapt to various complex construction environments. Not only can the number of clamps be adjusted according to actual construction requirements, but the clamp arrangement can also be optimized based on formwork type and concrete pouring method. This design enhances the regulator's versatility and practicality, enabling it to demonstrate significant technical adaptability and engineering application value while ensuring construction quality.

[0045] like Figures 1 to 3 As shown, in some embodiments of this utility model, the cross-sectional shape of the card plate 4 is rectangular or circular.

[0046] Specifically, the cross-sectional shape of the template 4 can be selected according to different construction requirements and template types. Rectangular cross-section templates have a larger load-bearing area and stability, while circular cross-section templates have good stress uniformity and ease of installation.

[0047] In detail, the planar contact characteristics of the rectangular cross-section clamp allow it to form sufficient contact with the formwork surface, effectively distributing load pressure. It is particularly suitable for flat formwork or situations requiring a large support area. This type of clamp provides stable support during concrete pouring, preventing formwork deformation caused by excessive local pressure.

[0048] Circular cross-section formwork plates, due to their non-directional geometry, eliminate the need for orientation adjustments during installation, significantly improving construction efficiency. Simultaneously, the circular outer edge structure avoids stress concentration at sharp corners, protecting the formwork surface and enhancing the plate's own durability. This design is particularly suitable for curved formwork or complex working conditions requiring multi-angle adjustments.

[0049] This diverse cross-sectional design allows the adjuster to flexibly adapt to various construction environments. Rectangular cross-sections are suitable for applications requiring high support stability, while circular cross-sections offer significant advantages in terms of ease of installation and versatility. Construction personnel can select the most suitable clamping plate cross-section based on the specific formwork type and protective layer thickness requirements.

[0050] Furthermore, the use of clamps with different cross-sectional shapes in conjunction with threaded steel bars 2 and locking nuts 5 further expands the applicability of the regulator. This design not only improves the accuracy of construction quality control but also extends the service life of the regulator and formwork by optimizing stress characteristics, demonstrating the practical value and innovation of this technical solution in actual engineering applications.

[0051] like Figures 1 to 3 As shown, in some embodiments of this utility model, the outer surface of the card plate 4 is provided with a protective layer.

[0052] Specifically, the protective layer refers to the protective coating or treatment layer covering the surface of the pallet 4 substrate. It can be implemented in different forms such as rust-proof plating, anti-corrosion coating, or wear-resistant coating. In practical applications, the protective layer can be formed through processes such as electroplating, hot-dip galvanizing, spraying, or chemical treatment to ensure that the pallet 4 can maintain good performance in alkaline concrete environments and humid conditions.

[0053] In detail, the protective layer significantly improves the durability and service life of the pallet 4 in harsh construction environments. During concrete pouring, the pallet 4 is directly exposed to highly alkaline cement slurry and is also in a humid environment for extended periods. These factors easily lead to corrosion and damage to metal components. The introduction of the protective layer effectively isolates the pallet substrate from direct contact with corrosive media, preventing rust from occurring.

[0054] This design not only extends the lifespan of the pallet itself, but also ensures stability when in contact with the template by maintaining the smoothness and flatness of the pallet surface. The surface hardening effect of the protective layer also enhances the wear resistance of the pallet, allowing it to maintain its original geometric dimensions and functional characteristics during repeated use.

[0055] Furthermore, the combined use of the protective layer and the base plate 4 enables the entire regulator to adapt to various harsh construction environments. This not only improves the regulator's adaptability to corrosive environments such as humidity and alkalinity, but also significantly enhances its economy and environmental friendliness by extending the service life of components. The versatility of the protective layer selection also allows this technical solution to be flexibly configured according to different engineering needs and cost considerations, demonstrating its dual advantages in practicality and economy.

[0056] like Figures 1 to 3 As shown, in some embodiments of this utility model, the clamping plate 4 is U-shaped, and the open end of the clamping plate 4 is sleeved on the outside of the threaded steel 2.

[0057] Specifically, a U-shaped clamp refers to a support component with a U-shaped cross-section structure, whose open end forms a channel through which the threaded steel bar 2 can pass. In practical applications, U-shaped clamps can be manufactured through processes such as stamping, casting, or machining, and their side flanges and bottom plate together form a stable support structure.

[0058] In detail, the unique structural design of the U-shaped clamping plate allows it to be inserted directly from the side without needing to be inserted through the end of the threaded steel bar during installation. This feature greatly improves the ease of installation of the regulator. When it is necessary to adjust the position of the clamping plate or disassemble it, simply loosen the locking nut to remove the clamping plate from the side of the threaded steel bar, avoiding the cumbersome operation of completely disassembling the threaded steel bar required by traditional ring clamping plates.

[0059] This design not only significantly improves construction efficiency, but also ensures stability under stress through the tight fit between the inner surface of the U-shaped structure and the outer wall of the rebar. The two side flanges of the U-shaped clamp can effectively resist the lateral forces generated during concrete pouring, preventing the clamp from rotating or shifting under stress, thereby ensuring the accuracy of the protective layer thickness.

[0060] Furthermore, the U-shaped clamping plate, in conjunction with the threaded steel bar 2 and the locking nut 5, forms an innovative structure that is both easy to install and ensures stability. The U-shaped opening design allows the clamping plate to be quickly installed and adjusted in any position, while the locking nut provides reliable fixation. This design significantly improves the adaptability and ease of operation of the regulator in complex construction environments, demonstrating an organic combination of practicality and innovation.

[0061] The introduction of this U-shaped clamping plate structure not only solves the technical problem of inconvenient installation of traditional ring clamping plates, but also enhances the stability of the regulator during concrete pouring by optimizing the stress characteristics. At the same time, it significantly improves construction efficiency while ensuring functionality, demonstrating significant technological progress.

[0062] like Figures 1 to 3As shown, in some embodiments of this utility model, the fixing nut 3 is fixed to the arc-shaped connector 1 by welding.

[0063] Specifically, welding connection refers to a connection method in which the fixing nut 3 and the arc-shaped connector 1 are permanently joined by melting metal at high temperature. It can be achieved using different welding processes such as arc welding, gas shielded welding, or resistance welding. In practical applications, the welding part is usually located on the outer side of the arc-shaped connector 1 near its end. The metallurgical bonding of the weld metal achieves accurate positioning and reliable fixation of the fixing nut 3.

[0064] In detail, the welded connection method ensures extremely high connection strength and stability between the fixing nut 3 and the arc-shaped connector 1. During the use of the adjuster, when the threaded steel bar 2 is rotated to adjust the protective layer thickness, the welded connection can effectively withstand the torque and axial force generated by the threaded pair transmission, preventing the fixing nut 3 from rotating or shifting relative to the arc-shaped connector 1. This reliable connection method provides a stable foundation for precise adjustment.

[0065] This design not only simplifies the overall structure of the regulator and eliminates additional mechanical connecting parts, but also enhances the overall rigidity of the regulator through an integrated connection. The permanent nature of the welded connection avoids loosening problems caused by vibration or impact during use, ensuring that the protective layer thickness remains stable during concrete pouring and vibration.

[0066] Furthermore, the combination of welded connections with the arc-shaped connector 1 and the fixing nut 3 gives the entire regulator a compact structure and simple manufacturing process. The welded connection method is suitable for various specifications of arc-shaped connectors and fixing nuts, offering good process adaptability and economy. This connection scheme not only improves product reliability but also reduces manufacturing costs by simplifying the structure, demonstrating the significant advantages of this technical solution in terms of engineering practicality and economy.

[0067] like Figures 1 to 3 As shown, in some embodiments of this utility model, the arc-shaped connector 1 is U-shaped, C-shaped, V-shaped or semi-circular.

[0068] Specifically, the various arc shapes of the arc connector 1 can be selected according to the different diameters of the reinforcing bars and construction requirements. The semi-circular structure has the best coverage and stability; the U-shaped structure is easy to install while maintaining good coverage; the C-shaped structure provides a larger opening for quick insertion of the reinforcing bars; and the V-shaped structure is suitable for smaller diameter reinforcing bars or occasions requiring a more compact design.

[0069] In detail, this diverse arc-shaped structural design allows the adjuster to adapt to various sizes of rebar cages. The semi-circular connector can form a maximum fit with the rebar surface, providing the most stable connection foundation; the U-shaped connector ensures sufficient coverage while its relatively straight sides facilitate processing and manufacturing; the C-shaped connector achieves a balance between ease of installation and connection reliability through an appropriate opening angle; and the V-shaped connector, with its sharp angle design, is particularly suitable for precise positioning on small-diameter rebars.

[0070] This design not only improves the adjuster's adaptability to different specifications of reinforcing bars, but also ensures the reliability of the connection by optimizing the contact method between the structure and the reinforcing bars. Connectors with different arc-shaped structures can be selected according to specific construction conditions and reinforcing bar diameters, ensuring that the adjuster can be firmly hung on the reinforcing bars while avoiding installation difficulties or unstable connections caused by shape mismatch.

[0071] Furthermore, the arc-shaped connector 1 is preferably semi-circular. The use of the semi-circular arc-shaped connector 1 in conjunction with the fixing nut 3 and the threaded steel bar 2 allows the entire regulator system to flexibly cope with various complex construction environments. Construction personnel can select the most suitable connector shape according to the actual site conditions, which greatly improves the practicality and applicability of the regulator. This diversified design concept not only reflects the product's versatility and adaptability but also improves construction efficiency by optimizing the user experience, demonstrating the practical value of technological innovation in actual engineering applications.

[0072] like Figures 1 to 3 As shown, in some embodiments of this utility model, the outer surfaces of the arc-shaped connector 1, the fixing nut 3, the threaded steel 2, and the locking nut 5 are all provided with a rust-proof and corrosion-resistant coating.

[0073] Specifically, rust-proof and corrosion-resistant coatings refer to protective coatings formed on the outer surface of metal parts through surface treatment technology. These coatings can be achieved using different processes such as electroplating, hot-dip galvanizing, Dacromet coating, or epoxy coating. In practical applications, this coating effectively prevents direct contact between the metal substrate and the alkaline environment of concrete and humid air through a dual mechanism of physical isolation and electrochemical protection, ensuring that each component maintains its intact surface condition and mechanical properties during long-term use.

[0074] In detail, the introduction of comprehensive coating protection provides a systematic anti-corrosion solution for the entire regulator, overcoming the problem of early failure caused by localized corrosion in traditional regulators. During concrete pouring and hardening, all components of the regulator are completely exposed to a highly alkaline environment (pH value can reach 12-13) and are also in a humid state for a long time. These factors accelerate the corrosion process of metal materials. Uniform rust and corrosion prevention treatment ensures that all metal components of the regulator have the same level of protection, avoiding overall functional failure due to the initial corrosion of a single component.

[0075] This design not only significantly extends the lifespan of the regulator but also ensures the motion accuracy of the threaded drive pair and the tightness reliability of the locking nut by maintaining the smoothness and flatness of the component surfaces. The surface hardening effect of the coating also enhances the wear resistance of each component during installation and disassembly, enabling it to maintain excellent performance during repeated use.

[0076] Furthermore, the comprehensive coating protection, combined with the coordinated use of all metal components of the regulator, enables the entire product system to adapt to various harsh construction environments and long-term service conditions. This not only improves the regulator's durability in humid, alkaline, and other corrosive environments but also significantly enhances its economic and environmental benefits by extending the product's lifespan. The unified surface treatment solution also simplifies the production process, ensures consistent product quality, and demonstrates the comprehensive advantages of this technical solution in terms of reliability, economy, and environmental protection.

[0077] like Figures 1 to 3 As shown, in some embodiments of this utility model, the rebar 2 is made of Q235 steel.

[0078] Specifically, Q235 steel refers to carbon structural steel with a yield strength of 235 MPa. It can be manufactured into the rod-shaped structure required for rebar 2 using hot rolling, cold drawing, or other forming processes. In practical applications, Q235 steel is machined to form an external thread structure, enabling it to precisely fit with the fixing nut 3 and the locking nut 5, ensuring that the adjustment system has sufficient transmission accuracy and connection reliability.

[0079] In detail, the selection of Q235 steel provides excellent comprehensive mechanical and technological properties for rebar 2. During the operation of the regulator, rebar 2 needs to withstand the tightening force from the locking nut, the lateral pressure generated by concrete pouring, and various loads during construction. Q235 steel has appropriate strength and good plasticity, which can meet the load-bearing requirements while avoiding the risk of brittle fracture that may be caused by excessive hardness.

[0080] This material selection not only ensures sufficient load-bearing capacity and durability of the rebar 2 during use, but also reduces production costs through its excellent machinability. Q235 steel is easy to machine, including cutting and rolling threads, enabling the economical and efficient manufacture of threaded rods with acceptable precision. Furthermore, this material has good weldability, facilitating end processing or connection to other components when needed.

[0081] Furthermore, the combined use of Q235 steel and an anti-rust and corrosion-resistant coating enables the rebar 2 to maintain stable performance over a long period in the alkaline environment of concrete. This mature material selection not only ensures product reliability but also significantly reduces manufacturing costs by using standardized building materials, demonstrating the optimal balance between performance and economy in this technical solution.

[0082] The widespread use of Q235 steel ensures a sufficient supply and stable quality of raw materials, providing a reliable material basis for the large-scale production and widespread application of regulators. This material selection considers both technical performance requirements and production feasibility and economic rationality, reflecting the practical value and promotional advantages of this technical solution in engineering practice.

[0083] like Figures 1 to 3 As shown, in some embodiments of this utility model, the arc-shaped connector 1 is also provided with a binding notch, which is used to cooperate with the wire to be inserted into the arc-shaped connector 1 for auxiliary binding and fixing, thereby enhancing the overall stability.

[0084] Specifically, the binding notch refers to a groove or opening structure set at a specific position on the arc-shaped connector 1, which can be implemented in different forms such as a U-shaped groove, a V-shaped groove, or a circular hole. In practical applications, the binding notch is usually set at any position on the arc-shaped connector 1, and its unique structural shape provides a reliable locking position for the binding wire, ensuring that the auxiliary binding can be effectively implemented.

[0085] In detail, the introduction of the binding notch provides an additional safety measure for the regulator, solving the stability problem that may exist with a single attachment method under complex construction conditions. During concrete pouring and vibration, the binding wire, in conjunction with the binding notch, assists in fixing the arc-shaped connector 1 to the reinforcing steel frame, forming a double safety mechanism. This design effectively prevents the regulator from shifting or falling off due to accidental collisions or strong vibrations, significantly improving the reliability of the construction process.

[0086] This design not only enhances the stability of the regulator in dynamic construction environments but also simplifies the construction process through standardized binding operations. The rational design of the binding notch makes the installation and removal of the wire more convenient, ensuring both effective fixation and avoiding negative impacts on construction efficiency. Furthermore, this feature, combined with the regulator's original threaded adjustment function, forms a complete fixing system.

[0087] Furthermore, the integrated design of the binding notch and the arc-shaped connector 1 ensures that this auxiliary fixing function does not require additional components, maintaining the simplicity of the regulator's structure. This design considers both safety requirements under special working conditions and convenience during regular use, reflecting the human-centered and professional nature of the product design. The introduction of the binding notch further expands the regulator's applicability, enabling it to play a greater role in engineering projects with higher stability requirements, such as high-rise buildings and large-span structures, demonstrating the deep consideration of construction safety through technological innovation.

[0088] like Figures 1 to 3 As shown, in some embodiments of this utility model, a washer ring is also provided on the outside of the threaded steel bar 2. The washer ring is set between the clamping plate 4 and the locking nut 5 to increase the force-bearing surface of the locking nut bolt and prevent it from falling off.

[0089] Specifically, the washer ring refers to the annular pressure-bearing component sleeved on the outside of the threaded steel bar 2. It can be implemented using a circular washer, a square washer, or other plate-like structures with a central through hole. In practical applications, the outer diameter of the washer ring is larger than the outer diameter of the locking nut 5. By increasing the force-bearing area, the clamping force of the locking nut on the clamping plate 4 is dispersed, ensuring that the fastening system can maintain a stable locking state even under long-term vibration.

[0090] In detail, the introduction of the washer ring effectively solves the loosening problem that may occur in traditional bolted connections under dynamic loads. During concrete pouring and vibration, the washer ring, through its large bearing area, evenly transmits the clamping force of the locking nut 5 to the surface of the clamping plate 4, avoiding plastic deformation caused by local stress concentration. At the same time, the combined use of the washer ring and the locking nut 5 forms a double locking mechanism, significantly enhancing the regulator's resistance to loosening under vibration.

[0091] This design not only improves the reliability and durability of the regulator, but also enables dynamic fine-tuning of the protective layer thickness by adjusting the distance between the clamping plate 4 and the washer ring via the nut 5. Construction workers can precisely control the adjustment amount of the protective layer thickness by observing changes in the gap between the washer ring and the clamping plate 4, providing a more intuitive operational basis for precise construction.

[0092] Furthermore, the coordinated operation of the washer ring, threaded steel bar 2, clamping plate 4, and locking nut 5 further optimizes the force transmission path of the adjuster. The addition of the washer ring makes the force distribution of the entire locking system more reasonable, protecting the clamping plate surface from damage and ensuring the long-term stability of the locking force. This design is particularly suitable for important engineering parts that require maintaining a precise protective layer thickness over a long period, reflecting a deep consideration for construction quality control.

[0093] The introduction of this pad ring structure not only solves the technical problem that traditional regulators may loosen in a vibration environment, but also improves the product's service life and reliability by optimizing the force transmission mechanism. At the same time, it provides a more convenient way to operate for precision construction while ensuring functionality.

[0094] like Figure 4 As shown, in another embodiment of this utility model, a specific construction method for the protective layer thickness adjuster for steel reinforcement cages is provided in practical applications. Taking a concrete structure with a designed protective layer thickness of 75mm as an example, the construction method is as follows: S1. Select the corresponding height adjuster assembly according to the design protective layer thickness; First, select the appropriate adjuster based on the concrete protective layer thickness required by the design drawings (e.g., 75mm). The rigid body of the adjuster (i.e., the threaded steel bar 2) is made of Q235 steel. The adjuster assembly includes an arc-shaped connector 1, threaded steel bar 2, fixing nut 3, clamping plate 4, and locking nut 5. All components are rust-proofed to enhance durability. S2. Determining and fixing the installation location On the erected formwork, accurately lay out the design positions of the reinforcing steel cage 100 and mark the installation points of the corresponding main reinforcing bars 200. Then, hook the corresponding main reinforcing bars 200 with the arc-shaped connector 1, pass the threaded steel bar 2 through the formwork 300, and clamp the steel formwork 300 with the clamping plate 4 on the threaded steel bar 2. The adjuster can be initially fixed to the formwork using M20 precision threaded steel bar or fixing nails. For vertical components (such as walls or columns), the adjuster is directly fixed to the outside of the formwork through the clamping plate 4; for horizontal components (such as floor slabs or beams), it is fixed to the hardened concrete base. When fixing, ensure that the clamping plate 4 fits tightly with the formwork or base and avoids tilting to ensure that the force on the adjuster and the formwork or base is uniform.

[0095] S3. Reinforcing bar insertion and initial fixing Insert the main reinforcement bars 200 of the steel reinforcement cage 100 into the arc-shaped connector 1 of the adjuster. The arc-shaped connector 1 is semi-circular, and its curvature can be adapted to the outer diameter of the main reinforcement bars 200 (for example, the main reinforcement bars 200 are 32mm steel bars), ensuring that the main reinforcement bars 200 can fit tightly against the inner arc surface of the arc-shaped connector 1 and are not easy to slip. After insertion, slightly adjust the position of the reinforcement bars so that the main reinforcement bars 200 are completely pressed against the inner surface of the arc-shaped connector 1. Tighten the locking nut 5 so that the clamping plate 4 is pressed against the template or base layer. Determine the actual thickness H of the protective layer (design 75mm), calculate the adjustment distance, and thus achieve fine-tuning of the protective layer thickness control.

[0096] S4. Binding, reinforcement, and final fixation To further enhance stability, before fine-tuning, use 1.2mm diameter iron wire to bind and reinforce the main reinforcement to the adjuster through the binding notch on the arc-shaped connector 1. When binding, use double-strand iron wire to wrap around the main reinforcement 2-3 times and tighten it securely, forming a double safety mechanism to prevent the reinforcement from shifting during concrete pouring. Finally, check that all nuts (fixing nut 3 and locking nut 5) are tightened to ensure that the fine-rolled threaded steel bar 2 is not loose and that the entire adjuster system is in a secure and reliable state.

[0097] S5, Adjustment and Subsequent Construction After all adjusters are installed, tighten the locking nut 5 using a torque wrench. The adjuster will move the reinforcing steel bars towards the formwork or base layer, thus reducing the protective layer thickness. Then, inspect the protective layer thickness. Use a depth gauge or calipers to measure the distance from the outer edge of the reinforcing steel bars to the formwork; the allowable deviation should be within ±2mm. After acceptance, concrete pouring can proceed. During pouring and vibration, the metal material and multiple fixing methods of the adjuster effectively resist impact and prevent displacement. After the concrete hardens, the locking nut 5 can be loosened to easily remove the adjuster. After cleaning, it can be reused in subsequent projects, significantly reducing costs and resource waste.

[0098] The above practical engineering applications demonstrate that this protective layer thickness adjuster can control the protective layer thickness deviation within ±2mm, far exceeding the ±5mm requirement of traditional methods. Furthermore, its reusability improves construction efficiency by approximately 20%. This device has been successfully applied in multiple engineering projects, including cross-sea bridges, achieving significant technical and economic benefits.

[0099] Furthermore, this protective layer thickness adjuster is not only suitable for ordinary reinforced concrete structures, but can also be extended to various engineering fields such as prestressed concrete structures and steel-concrete composite structures, and has broad application prospects.

[0100] Although the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A protective layer thickness adjuster for a reinforcing steel cage, characterized in that, It includes an arc-shaped connector (1), on which at least one fixing nut (3) is provided, and on which an adjuster is provided; The adjuster includes a threaded steel bar (2) and a locking nut (5) with threaded connection, the threaded steel bar (2) being disposed on the fixing nut (3).

2. The protective layer thickness adjuster for a reinforcing bar cage according to claim 1, characterized in that, The threaded steel bar (2) is fitted with a clamping plate (4).

3. The protective layer thickness adjuster for a reinforcing steel cage according to claim 2, characterized in that, The number of the card plate (4) is not less than 1.

4. The protective layer thickness adjuster for a reinforcing steel cage according to claim 2, characterized in that, The cross-sectional shape of the card plate (4) is rectangular or circular.

5. A protective layer thickness adjuster for a reinforcing steel cage according to claim 2, characterized in that, The outer surface of the card plate (4) is provided with a protective layer.

6. A protective layer thickness adjuster for a reinforcing bar cage according to claim 2, characterized in that, The card plate (4) is U-shaped, and the open end of the card plate (4) is sleeved on the outside of the threaded steel (2).

7. A protective layer thickness adjuster for a reinforcing bar cage according to claim 1, characterized in that, The fixing nut (3) is fixed to the arc-shaped connector (1) by welding.

8. A protective layer thickness adjuster for a reinforcing steel cage according to claim 1, characterized in that, The arc-shaped connector (1) is U-shaped, C-shaped, V-shaped or semi-circular.

9. A protective layer thickness adjuster for a reinforcing bar cage according to claim 1, characterized in that, The outer surfaces of the arc-shaped connector (1), the fixing nut (3), the threaded steel (2), and the locking nut (5) are all provided with a rust-proof and corrosion-resistant coating.

10. A protective layer thickness adjuster for a reinforcing steel cage according to claim 1, characterized in that, The rebar (2) is made of Q235 steel.

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