A new type of cover block for reinforcing steel
Patent Information
- Application Number
- CN202522588371.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-05
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-05
AI Technical Summary
Existing steel reinforcement protective layer spacers are prone to damage and displacement during use, and stress concentration leads to unstable construction and low efficiency.
Design a cross-shaped pad body with horizontal and vertical through grooves and connecting components to increase the contact area and stability. It is formed by concrete casting to accommodate steel bars of different specifications and has anti-slip texture inside to enhance connection stability.
It improves the stability and compressive strength of the pad, reduces the risk of breakage, and enhances construction efficiency and the control accuracy of the protective layer thickness.
Smart Images

Figure CN224931271U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of engineering construction, and in particular to a novel steel reinforcement protective layer pad. Background Technology
[0002] Reinforcing bar protective layer spacers play a crucial role in preventing rust and surface cracks in reinforcing bars during construction. Currently, there are roughly three types of spacers available on the market. The first type is the quincunx-shaped spacer. This type of spacer has a small contact area with the reinforcing bar, resulting in high stress concentration. It is prone to cracking during formwork installation. Furthermore, this type of spacer is not slip-resistant and can easily rotate after being tied to the reinforcing bar, thus failing to fulfill its function as a spacer. The second type is the square spacer. The corner stress concentration makes it prone to cracking, and this type of spacer is also prone to displacement after installation. The third type is the tripod or frustum-shaped spacer. It has a low tolerance for construction errors, and the shape of the spacer, which is wider at the top and narrower at the bottom or uses three legs as fulcrums, also results in high stress concentration and easy damage. Utility Model Content
[0003] The present invention aims to provide a new type of steel reinforcement protective layer spacer, which has a stable overall structure, uniform stress distribution, and avoids the problems of easy breakage and displacement of traditional spacers.
[0004] Therefore, the technical solution adopted by this utility model is as follows: a novel steel reinforcement protective layer spacer, including a spacer body, the spacer body being in the shape of a cross, the spacer body having a first through groove in the horizontal direction for connecting with the horizontal steel reinforcement, and a second through groove in the vertical direction for connecting with the vertical steel reinforcement, the first through groove and the second through groove being located on the same side of the spacer body, and the first through groove and the second through groove having different depths, respectively corresponding to and closely attached to the horizontal steel reinforcement and the vertical steel reinforcement connected together, the spacer body being provided with a connecting component for fixing the spacer body at the connection point of the horizontal steel reinforcement and the vertical steel reinforcement.
[0005] As a preferred embodiment of the above solution, the connecting assembly includes two fixing holes provided on the pad body and a steel wire rope passing through the two fixing holes to tie the pad body together with the horizontal and vertical reinforcing bars. The two fixing holes are arranged diagonally opposite each other on the pad body.
[0006] More preferably, the back of each of the four ends of the pad body is provided with a chamfer or rounding.
[0007] More preferably, the pad block body is formed by casting concrete using a mold, and the dimensions of the first and second through grooves are adjusted on the mold according to the dimensions of the horizontal and vertical reinforcing bars.
[0008] More preferably, the first and second through grooves are provided with anti-slip textures.
[0009] The beneficial effects of this utility model are as follows: The design of the pad body in a "+" shape increases the contact area between the pad body and the vertical and horizontal reinforcing bars, avoiding stress concentration caused by insufficient contact area and resulting in damage to the pad body; the first and second through slots are set perpendicularly, making the installation more secure and stable, preventing the pad body from shifting or rotating after installation; the connection components ensure overall structural stability, uniform stress distribution, and enhanced compressive strength, making it less prone to rotation or detachment during construction, thus improving the control accuracy of the reinforcing bar protective layer thickness and construction efficiency. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation
[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0012] like Figure 1 As shown, a novel rebar protective layer spacer includes a spacer body 1, which is shaped like a cross. The spacer body 1 has a first through groove 2 in the horizontal direction for connecting with the horizontal rebar, and a second through groove 3 in the vertical direction for connecting with the vertical rebar. The cross-shaped design increases the contact area between the spacer body 1 and the horizontal and vertical rebars, avoiding stress concentration and making it less prone to damage. The cross shape, combined with the two slots, makes the installation more secure and stable, making the spacer less prone to displacement and rotation.
[0013] The first through groove 2 and the second through groove 3 are located on the same side of the pad body 1, and the first through groove 2 and the second through groove 3 have different depths. They correspond to and are close to the horizontal and vertical steel bars that are connected together, respectively. The pad body 1 is provided with a connecting component for fixing the pad body 1 at the connection of the horizontal and vertical steel bars.
[0014] The connecting assembly includes two fixing holes 4 on the block body 1 and a steel wire rope (not shown in the figure) passing through the two fixing holes 4 to tie the block body 1 to the horizontal and vertical reinforcing bars. The two fixing holes 4 are arranged diagonally on the block body 1. The diagonal arrangement of the fixing holes 4 facilitates the passage of the steel wire rope through the connection point between the horizontal and vertical reinforcing bars, making the binding more secure.
[0015] The back of each end of the pad block body 1 is chamfered or rounded. By chamfering or rounding the back of the four ends of the pad block body 1, the contact area between the pad block body 1 and the formwork is reduced, which can fit the curvature of the formwork and avoid the displacement of the reinforcing bars due to local gaps, thus ensuring that the protective layer thickness is uniform and meets the standards. The small contact surface pad blocks, combined with the high density arrangement, can disperse stress and reduce fatigue damage.
[0016] The block body 1 is formed by casting concrete using a mold. The dimensions of the first through groove 2 and the second through groove 3 are adjusted on the mold according to the dimensions of the horizontal and vertical reinforcing bars. By adjusting the first through groove 2 and the second through groove 3 according to the dimensions of the horizontal and vertical reinforcing bars, it can be adapted to the protective layer structure of reinforcing bars of different specifications, thus increasing its applicability.
[0017] The first through groove 2 and the second through groove 3 are provided with anti-slip textures (not shown in the figure). The anti-slip textures ensure a more stable connection with the horizontal and vertical reinforcing bars.
[0018] The pad body 1 is designed in a "+" shape to increase the contact area between the pad body 1 and the vertical and horizontal reinforcing bars, thus avoiding stress concentration caused by insufficient contact area and potential damage to the pad body 1. The first through groove 2 and the second through groove 3 are set vertically, making the installation more secure and stable, and preventing the pad body 1 from shifting or rotating after installation. The connecting components are set to ensure overall structural stability, uniform stress distribution, and enhanced compressive strength. It is not easy to rotate or fall off during construction, thereby improving the control accuracy of the reinforcing bar protective layer thickness and construction efficiency.
[0019] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A novel steel reinforcement protective layer spacer, comprising a spacer body (1), characterized in that: The pad body (1) is shaped like a cross. The pad body (1) has a first through groove (2) connected to the horizontal reinforcing bar in the horizontal direction and a second through groove (3) connected to the vertical reinforcing bar in the vertical direction. The first through groove (2) and the second through groove (3) are located on the same side of the pad body (1), and the depths of the first through groove (2) and the second through groove (3) are different, corresponding to and close to the horizontal and vertical reinforcing bars connected together. The pad body (1) is provided with a connecting component for fixing the pad body (1) at the connection of the horizontal and vertical reinforcing bars. The connecting component includes two fixing holes (4) on the pad body (1) and a steel wire rope that passes through the two fixing holes (4) to tie the pad body (1) to the horizontal and vertical reinforcing bars. The two fixing holes (4) are diagonally arranged on the pad body (1).
2. The novel steel reinforcement protective layer spacer according to claim 1, characterized in that: The back of each of the four ends of the pad body (1) is provided with chamfers or rounding.
3. The novel steel reinforcement protective layer spacer according to claim 1, characterized in that: The pad block body (1) is formed by casting concrete through a mold. The dimensions of the first through groove (2) and the second through groove (3) are adjusted on the mold according to the dimensions of the horizontal and vertical reinforcing bars.
4. A novel steel reinforcement protective layer spacer according to claim 3, characterized in that: The first through groove (2) and the second through groove (3) are provided with anti-slip texture.
