A cover block for reinforcing steel

Abstract

This utility model belongs to the field of building construction technology, specifically relating to a rebar protective layer spacer, including a first support and two second supports hinged to it. The two second supports are symmetrically arranged about the vertical axis of the first support. Each second support and the first support are provided with a connecting lug and a baffle at the hinge point. Each connecting lug is vertically arranged on the surface of the corresponding second support, and both ends of the first support are respectively hinged to the adjacent connecting lug. The baffles are all arranged on the surface of the first support, and each baffle corresponds to and is arranged opposite to the connecting lug. A limiting member is provided between the two opposite surfaces of the baffle and the connecting lug, and the first support can only rotate in one direction under the action of the limiting member and can be fixed in the current position. The end of each second support away from the first support is detachably connected to a third support. This utility model can effectively solve the problem that the current rebar spacer has a limited scope of application and cannot adjust the spacing of rebars of different sizes.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, and specifically relates to a steel reinforcement protective layer spacer. Background Technology

[0002] The durability of reinforced concrete structures (buildings, bridges, etc.) depends on the concrete cover for the reinforcing bars. The thickness must be determined according to the "Code for Design of Concrete Structures" (GB 50010) and the "Code for Acceptance of Construction Quality of Concrete Structures" (GB 50204), based on the component type and environment. Otherwise, the reinforcing bars are prone to corrosion and expansion, leading to concrete cracking and structural failure. The concrete cover requires spacers to position the reinforcing bars. Early temporary materials such as broken bricks and gravel had problems such as strength mismatch, large dimensional deviations, and poor adhesion, making dedicated spacers essential. Existing spacers are divided into three categories: cement-based spacers, plastic spacers, and composite spacers. In actual construction, spacers still have drawbacks such as difficulty in fixing, poor adaptability to high humidity / salt spray / high temperature environments, and delayed quality inspection. There is an urgent need to develop improved spacers that are highly adaptable, easy to construct, and low-cost. To address this, for example, a Chinese patent discloses a steel reinforcement protective layer pad (patent publication number: CN216196046U). By using the cooperation of the first and second grooves set on the top of the lower disc, the position of the lower layer of steel reinforcement in the floor slab can be limited to prevent displacement during pouring. By using the cooperation of the third and fourth grooves set on the top of the upper disc, the position of the upper layer of steel reinforcement in the floor slab can be limited to prevent displacement during pouring. The upper and lower discs are connected to each other by a snap-fit ​​mechanism. At the same time, due to the presence of two first support blocks and two second support blocks, the four corners between the lower and upper discs can be supported simultaneously.

[0003] While the above technical solution has solved the positioning and fixing effect of the cross-shaped binding of the upper and lower layers of steel bars to a certain extent, the upper and lower discs are fixedly connected by snap-fit, and the distance between the upper and lower discs and the distance between the lower disc and the baffle cannot be adjusted. This results in a single fixing and positioning effect for the steel bars. In addition, the dimensions of each groove are also fixed, which cannot meet the positioning requirements of steel bars with different design needs. It can only fix steel bars of a single size. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a rebar protective layer spacer to solve the problem that the current rebar spacers have limited applicability and cannot adjust the spacing of rebars of different sizes.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A steel reinforcement protective layer pad includes a first support and two second supports hinged to it. The two second supports are symmetrically arranged about the vertical axis of the first support. Each second support and the first support has a connecting lug and a baffle at the hinge point. Each connecting lug is vertically arranged on the surface of the corresponding second support, and both ends of the first support are respectively hinged to the adjacent connecting lug. Each baffle is arranged on the surface of the first support, and each baffle corresponds to and is arranged opposite to the connecting lug. A limiting member is provided between the opposite two sides of the baffle and the connecting lug. Under the action of the limiting member, the first support can only rotate in one direction and can be fixed in the current position. The end of each second support away from the first support is detachably connected to a third support. Each third support and each second support has a connecting cylinder at the connection point. One end of each connecting cylinder is rotatably connected to the third support, and the other end is sleeved on the outer surface of the corresponding second support and threadedly connected to it.

[0006] Furthermore, both ends of the first bracket extend into connecting ears and are connected to limiting discs, and each limiting disc is spaced apart from the adjacent connecting ear. The limiting component includes multiple first blocks disposed on the outer surface of the baffle and multiple second blocks disposed on the outer surface of the connecting ear. Two springs are sleeved on the outer surface of the first bracket. The two springs are respectively disposed between the baffle and the adjacent connecting ear, and between the limiting disc and the other adjacent connecting ear. Under the action of the springs, the first bracket moves elastically along its rotation axis. Each first block and second block is circumferentially arrayed around the rotation center of the first bracket, and the positions and numbers of the first blocks and second blocks correspond one-to-one. Each first block, second block, and spring together constitute a ratchet mechanism.

[0007] Furthermore, each of the first and second blocks has an inclined portion and a vertical portion on its outer surface. When the first support is fixed after rotating around the rotation center, the vertical portions of each of the first and second blocks abut against each other and restrict the rotation of the first support.

[0008] Furthermore, the surface of the first bracket is provided with a recessed portion that abuts against the reinforcing bar.

[0009] Furthermore, each of the second supports has a vertically placed abutment block fixed on its outer surface, and the surface of the abutment block that abuts against the reinforcing bar is arc-shaped.

[0010] Furthermore, the first bracket, the second bracket, the third bracket, the connecting cylinder, the limiting plate, the baffle, the limiting component, the connecting ear, and the abutment block are all made of metal materials, and their outer surfaces are all coated with an anti-rust coating.

[0011] Furthermore, the outer surfaces of the first bracket, the second bracket, and the abutment block are all provided with anti-slip stripes.

[0012] The beneficial effects of this utility model are as follows: This invention utilizes a threaded connection between a connecting cylinder and a second support to flexibly adjust the vertical spacing between the reinforcing bars and the formwork. A ratchet mechanism (comprising a first stop block, a second stop block, and a spring) controls the unidirectional rotation of the first support, enabling precise adjustment of the spacing between reinforcing bars on different horizontal planes. This eliminates the need to replace spacers of different specifications, thus meeting the protective layer thickness requirements for various components such as beams, slabs, and columns, effectively expanding its applicability. The first support features a recessed portion, and the second support features an arc-shaped abutment block, which can conform to the surfaces of reinforcing bars of different sizes, restricting lateral slippage and ensuring stable positioning of the first and second supports after contact with the reinforcing bars. This prevents spacer displacement and reinforcing bar sagging during concrete pouring and vibration, ensuring that the protective layer thickness deviation meets the specifications.

[0013] Other advantages, objectives, and features of this invention will be set forth in the following description and will be apparent to those skilled in the art to some extent, or may be learned by practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0014] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a top view of the overall structure of this utility model; Figure 3 This is an exploded view of the present invention; Figure 4 for Figure 2 Enlarged view of point A in the middle; Figure 5 for Figure 3 Enlarged view of point B in the middle; Figure 6 This is a schematic diagram of the present invention and the steel bar fixing structure; Figure 7 This is a side view of the present invention and the steel reinforcement fixing structure.

[0015] The following labels are shown in the attached diagram: 1 First bracket, 2 Second bracket, 3 Connecting ear, 4 Baffle, 5 Third bracket, 6 Connecting cylinder, 7 Limiting plate, 8 First stop block, 9 Second stop block, 10 Spring, 11 Vertical part, 12 Inclined part, 13 Recessed part, 14 Abutting block. Detailed Implementation

[0016] like Figures 1 to 7 As shown, A steel reinforcement protective layer pad includes a first support 1 and two second supports 2 hinged to it. The two second supports 2 are symmetrically arranged about the vertical axis of the first support 1. Each second support 2 is convex upward in the middle and inclined downward on both sides in the vertical plane. One end of each second support 2 is hinged to the first support 1, and each hinge point between the second support 2 and the first support 1 is provided with a connecting lug 3 and a baffle 4. Each connecting lug 3 is vertically arranged and welded to the surface of the corresponding second support 2. Both ends of the first support 1 are respectively hinged to the adjacent connecting lug 3. Each baffle 4 is convex upward in the middle and inclined downward on both sides in the vertical plane. The ring-shaped baffles 4 are all welded and fixed to the surface of the first bracket 1, and each baffle 4 corresponds to a connecting ear 3 and is arranged at intervals. A limiting member is provided between the two opposite surfaces of the baffles 4 and the connecting ear 3. Under the action of the limiting member, the first bracket 1 can only rotate in one direction and can be fixed in the current position. The end of each second bracket 2 away from the first bracket 1 is detachably connected to a third bracket 5. A connecting cylinder 6 is provided at the connection between the third bracket 5 and each second bracket 2. One end of each connecting cylinder 6 is rotatably connected to the third bracket 5, and the other end is sleeved on the outer surface of the corresponding second bracket 2 and threadedly connected to it.

[0017] As shown in the diagram, when adjusting the distance between the reinforcing bars and the formwork, first separate the third support 5 from each of the second supports 2. Then, place the two second supports 2 vertically on the upper surface of the formwork and adjust their positions so that the surface of the reinforcing bars simultaneously passes through the upper surfaces of the two second supports 2 and is located between the first support 1 and the second support 2. Next, connect the third support 5 to each of the second supports 2. By rotating the connecting cylinder 6, not only can the third support 5 be fixedly connected to the second supports 2, but the distance between the third support 5 and each of the second supports 2 can also be indirectly adjusted. This allows for adjustment of the vertical height of one end of each second support 2 within a certain range, ensuring that the surface of each second support 2 abuts against the reinforcing bars and raises them to the specified height. Then, by rotating the first support 1, it rotates towards the direction of the third support 5 until the surface of the first support 1 abuts against the surface of the reinforcing bars on another horizontal plane (note that the reinforcing bars abutted by the first support 1 and the reinforcing bars abutted by the second support 2 are not on the same horizontal plane). Figure 6 and Figure 7As shown, a limiting element is provided between the baffle 4 and the connecting ear 3 to restrict the first support 1 to rotate only in one direction, so that the first support 1 can only rotate towards the direction of the third support 5. Therefore, when the first support 1 rotates and abuts against the surface of the reinforcing bar, the first support 1 is fixed in its current position under the action of the limiting element. By rotating the first support 1 and stopping it at different angles, the distance between the reinforcing bars on two different horizontal planes can be indirectly adjusted. Furthermore, by adjusting the connecting cylinder 6, the distance between the reinforcing bar and the formwork can also be indirectly adjusted. At the same time, the first support 1 and the second support 2 can abut against the surface of reinforcing bars of different sizes, effectively expanding the scope of application of this utility model. It is simple to operate and highly practical.

[0018] In this embodiment, both ends of the first bracket 1 extend out of the connecting ears 3 and are welded and fixed with limiting discs 7. Each limiting disc 7 is spaced apart from the adjacent connecting ears 3. The limiting component includes multiple first blocks 8 disposed on the outer surface of the baffle 4 and multiple second blocks 9 disposed on the outer surface of the connecting ears 3. Two springs 10 are sleeved on the outer surface of the first bracket 1. The two springs 10 are respectively disposed at both ends of the first bracket 1. The two springs 10 are respectively disposed between the baffle 4 and the adjacent connecting ears 3, and between the limiting disc 7 and the other adjacent connecting ear 3. The first bracket 1 moves elastically axially along its rotation axis under the action of the springs 10. Each first block 8 and second block 9 is circumferentially arrayed around the rotation center of the first bracket 1, and the positions and numbers of the first blocks 8 and second blocks 9 correspond one-to-one. Each first block 8, second block 9 and spring 10 together constitute a ratchet mechanism. There are two limiting components. The two limiting components are respectively disposed between the limiting disc 7 and the adjacent connecting ear 3, and between the baffle 4 and the other adjacent connecting ear 3 (the positions of the two limiting components can be referenced). Figure 2 and Figure 3 ).

[0019] As shown in the figure, the two springs 10 are not mirror images of the first bracket 1, but are respectively positioned on one side of the two connecting ears 3 (see reference). Figure 2Because the limiting discs 7 and connecting ears 3 are spaced apart, the first bracket 1 can move axially a certain distance along its rotation axis. When both springs 10 are in the extended state, one of the limiting discs 7 abuts against the surface of the connecting ear 3, and one of the baffles 4 abuts against the surface of the adjacent connecting ear 3. At the same time, each of the first stops 8 and the corresponding second stops 9 are circumferentially staggered and their surfaces abut against each other, restricting the first bracket 1 from rotating away from the third bracket 5. When it is necessary to rotate the first bracket 1 and move it towards the third bracket 5, the operator rotates the first bracket 1 by hand. During the rotation, the surfaces of the first stops 8 and the second stops 9 abut against each other will cause the first bracket 1 to move axially a certain distance along its rotation axis. When the first bracket 1 is rotated, the two springs 10 are compressed, and the first bracket 1 continues to rotate until the first stops 8 and the second stops 9 are circumferentially staggered. At this point, the springs 10 extend and return to their original positions, and the first bracket 1 is fixed in its current position under the action of the first stops 8 and the second stops 9. The first stops 8 can be regarded as ratchet, and the second stops 9 and the springs 10 can be regarded as pawls. When the first bracket 1 rotates, the repeated stretching and compression of the springs 10 can make the first stops 8 and the second stops 9 rotate relative to each other. At the same time, when the first bracket 1 is stationary, the two ends of each spring 10 abut against the corresponding connecting lugs 3, limiting discs 7 and baffles 4, respectively, so that the first stops 8 and the second stops 9 abut against each other and restrict the rotation of the first bracket 1, thus achieving the effect of a ratchet mechanism.

[0020] Setting two limiting components can effectively improve the stability of the movement of the first support 1, and at the same time improve the support effect of the first support 1, which can effectively abut against the surface of the steel bar and fix it in the current position.

[0021] In this embodiment, the outer surfaces of each of the first blocks 8 and the second blocks 9 are provided with an inclined portion 12 and a vertical portion 11. When the first support 1 is fixed after rotating around the rotation center, the vertical portions 11 of each of the first blocks 8 and the second blocks 9 abut against each other and restrict the rotation of the first support 1.

[0022] Combination Figure 4 As shown, each first stop 8 and the corresponding second stop 9 together form a centrally symmetrical figure. When the first support 1 rotates toward the third support 5, the inclined part 12 of each first stop 8 abuts against the inclined part 12 of the corresponding second stop 9, ensuring that the first support 1 can rotate smoothly. When the first support 1 is stationary, the vertical part 11 of each first stop 8 abuts against the vertical part 11 of the corresponding second stop 9, restricting the first support 1 from rotating in the opposite direction. The structure is simple, the operation is convenient, and the work efficiency of construction personnel is effectively improved.

[0023] In this embodiment, the surface of the first bracket 1 is provided with a recess 13 that abuts against the reinforcing bar.

[0024] Combination Figure 6 As shown, the recessed portion 13 of the first support 1 is used to place and abut against the reinforcing bar, which can limit the displacement of the first support 1 to a certain extent, prevent displacement caused by pouring concrete, and ensure the stability of this utility model.

[0025] In this embodiment, each of the second brackets 2 has a vertically placed abutment block 14 welded and fixed to its outer surface, and the surface of the abutment block 14 that abuts against the reinforcing bar is arc-shaped.

[0026] Combination Figure 7 As shown, the abutment block 14 and the second bracket 2 together form a limiting structure for placing the reinforcing bars. The second bracket 2 can be restricted and fixed in the current position by the reinforcing bars to prevent displacement caused by pouring concrete. At the same time, after each second bracket 2 is fixed, it can provide a stable base for the first bracket 1, ensuring that the first bracket 1 can stabilize the reinforcing bars on different horizontal planes, thus ensuring the stability of this utility model.

[0027] In this embodiment, the first bracket 1, the second bracket 2, the third bracket 5, the connecting cylinder 6, the limiting plate 7, the baffle 4, the limiting component, the connecting ear 3, and the abutment block 14 are all made of metal materials, and their outer surfaces are all coated with anti-rust coatings, which can effectively prevent rusting and ensure the normal rotation of the first bracket 1.

[0028] In this embodiment, the outer surfaces of the first bracket 1, the second bracket 2, and the abutment block 14 are all provided with anti-slip stripes (the anti-slip stripes are not shown in the figure).

[0029] The anti-slip stripes can effectively increase the friction between the first support 1, the second support 2, the abutment block 14 and the surface of the steel bar, indirectly improving the fixing effect between the present invention and the steel bar, and ensuring the stability of the present invention.

[0030] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A steel reinforcement protective layer spacer, comprising a first support (1) and two second supports (2) hinged thereto, characterized in that: Two second brackets (2) are symmetrically arranged about the vertical axis of the first bracket (1). Each second bracket (2) and the first bracket (1) is provided with a connecting ear (3) and a baffle (4) at the hinge point. Each connecting ear (3) is vertically arranged on the surface of the corresponding second bracket (2), and the two ends of the first bracket (1) are respectively hinged to the adjacent connecting ear (3). Each baffle (4) is arranged on the surface of the first bracket (1), and each baffle (4) corresponds to and is arranged opposite to the connecting ear (3). A limiting member is provided between the two opposing surfaces of the connecting ear (3), and the first bracket (1) can only rotate in one direction and be fixed in the current position under the action of the limiting member. The end of each second bracket (2) away from the first bracket (1) is detachably connected to a third bracket (5). The connection between the third bracket (5) and each second bracket (2) is provided with a connecting cylinder (6). One end of each connecting cylinder (6) is rotatably connected to the third bracket (5), and the other end is sleeved on the outer surface of the corresponding second bracket (2) and threadedly connected to it.

2. The steel reinforcement protective layer spacer according to claim 1, characterized in that: Both ends of the first bracket (1) extend out of the connecting ears (3) and are connected to the limiting discs (7). Each limiting disc (7) is spaced apart from the adjacent connecting ears (3). The limiting component includes multiple first blocks (8) disposed on the outer surface of the baffle (4) and multiple second blocks (9) disposed on the outer surface of the connecting ears (3). Two springs (10) are sleeved on the outer surface of the first bracket (1). The two springs (10) are respectively disposed between the baffle (4) and the adjacent connecting ears (3) and between the limiting discs (7) and the other adjacent connecting ear (3). The first bracket (1) moves elastically along its rotation axis under the action of the springs (10). Each first block (8) and second block (9) is arranged in a circumferential array around the rotation center of the first bracket (1). The positions and numbers of the first blocks (8) and second blocks (9) correspond one-to-one. Each first block (8), second block (9) and spring (10) together constitute a ratchet mechanism.

3. A steel reinforcement protective layer spacer according to claim 2, characterized in that: Each of the first stop (8) and the second stop (9) has an inclined part (12) and a vertical part (11) on its outer surface. When the first support (1) is fixed after rotating around the rotation center, the vertical parts (11) of each of the first stop (8) and the second stop (9) abut against each other and restrict the rotation of the first support (1).

4. A steel reinforcement protective layer spacer according to claim 3, characterized in that: The surface of the first bracket (1) is provided with a recess (13) that abuts against the reinforcing bar.

5. A steel reinforcement protective layer spacer according to claim 4, characterized in that: Each of the second brackets (2) has a vertically placed abutment block (14) fixed on its outer surface, and the surface of the abutment block (14) that abuts against the steel bar is arc-shaped.

6. A steel reinforcement protective layer spacer according to claim 5, characterized in that: The first bracket (1), the second bracket (2), the third bracket (5), the connecting cylinder (6), the limiting plate (7), the baffle (4), the limiting component, the connecting ear (3), and the abutment block (14) are all made of metal materials, and their outer surfaces are all coated with anti-rust coating.

7. A steel reinforcement protective layer spacer according to claim 6, characterized in that: The outer surfaces of the first bracket (1), the second bracket (2), and the abutment block (14) are all provided with anti-slip stripes.

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