A rebar protective layer adjustment device

Abstract

This utility model relates to the field of reinforced concrete construction technology, specifically to a rebar protective layer adjustment device. The device includes a support sleeve, with adjusting rods threaded through both ends of the sleeve. The ends of the adjusting rods are rotatably connected to a fixing rod, and a clamping assembly for clamping the rebar is fixedly connected to the fixing rod. This device can directly clamp any part of the rebar (including the middle, upper, and other areas with significant sway), and provide precise support (outer support) or tension (inner pull) for the rebar on both sides of that part. The device uses an open-type locking frame or a symmetrical clamping rod structure, allowing direct clamping from the side of the rebar without the need for end-mounting. It can be installed at any part of the rebar (including the middle and densely bundled areas), overcoming the limitation of existing devices that can only operate at the beginning or end of the rebar.

Description

Technical Field

[0001] This utility model relates to the field of reinforced concrete construction technology, specifically to a rebar protective layer adjustment device. Background Technology

[0002] Lock chamber walls are mostly tall reinforced concrete walls. After the pre-embedded reinforcing bars are positioned at the bottom, the free ends swing significantly, making it difficult to control the concrete cover. When the concrete cover is less than the design value, concrete spacers are used for adjustment. However, when the concrete cover is greater than the design value, simply tightening the top reinforcing bars results in significant deflection in the middle of the bars, causing the concrete cover in the middle to be far greater than the design requirements.

[0003] Chinese patent CN202411025665.8 discloses a "Reinforced Concrete Protective Layer Thickness Positioning Device" (publication number CN118745794A). This device includes horizontally and vertically distributed reinforcing bars A and B. The top and bottom reinforcing bars A are connected to groove blocks A and B, respectively. A flange seat A is fixedly mounted on the top of the screw rod A, and the bottom of the column bar is threadedly connected to the screw rod B. The bottom of the flange seat B is detachably connected to the lower template via bolts. However, this device has some drawbacks: in actual construction, reinforcing bars are often arranged in a horizontally and vertically bundled frame structure, with the middle reinforcing bars surrounded by surrounding bars, limiting the operating space and making it difficult to embed the clamping frame in the middle of the reinforcing bars; it can only be installed at the beginning or end of unobstructed reinforcing bars, making it unsuitable for positioning the protective layer in the middle of the reinforcing bars, thus limiting its applicability; moreover, the clamping frame is made of PVC, which has poor rigidity and cannot firmly support or tighten the reinforcing bars on both sides. Utility Model Content

[0004] To address the problems of the prior art, this utility model provides a rebar protective layer adjustment device that can be directly clamped at any part of the rebar (including the middle, upper and other areas with significant swing) and can accurately support (outer push) or tighten (inner pull) the rebar on both sides of the part.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rebar protective layer adjustment device, comprising a support sleeve, both ends of which are threaded with adjustment rods, the ends of which are rotatably connected to a fixing rod, and a clamping assembly for clamping the rebar is fixedly connected to the fixing rod.

[0006] With the above structural design, the overall length can be changed by rotating the adjusting rod through the threaded connection between the support sleeve and the adjusting rod, so as to achieve linear adjustment of the position of the reinforcing bar (pulling it closer or pushing it further away), and to provide precise support (outer push) or tension (inner pull) for the reinforcing bars on both sides of the part; the clamping component can firmly fix the reinforcing bar, prevent the reinforcing bar from slipping during the adjustment process, and ensure effective transmission of the adjustment force.

[0007] Preferably, a first anti-slip pad is fixedly attached to the outer wall of the support sleeve, and an auxiliary rod is fixedly connected to the front end of the adjusting rod.

[0008] With the above structural design, the first anti-slip pad increases the friction between the support sleeve and the operator's hand, preventing the sleeve from slipping due to force during adjustment. The auxiliary rod extends the lever arm of the adjustment rod, making it easier to rotate the adjustment rod and improving operational safety.

[0009] Preferably, the end of the adjusting rod is fixedly connected to a snap-fit ​​post, and an annular snap-fit ​​groove is formed on one end of the snap-fit ​​post near the adjusting rod. A stepped groove adapted to the snap-fit ​​post is formed on the fixing rod.

[0010] The above structural design, with the engagement of the snap-fit ​​post and the stepped groove, enables the rotational connection between the adjusting rod and the fixed rod. At the same time, the limiting structure of the annular snap-fit ​​groove and the stepped groove can prevent the two from axially separating, ensuring the stable transmission of force during the adjustment process.

[0011] Preferably, the clamping assembly includes a locking frame fixedly connected to the fixing rod and a locking bolt threaded through the end of the locking frame. The locking frame is an open frame structure and the opening direction is adapted to the bar clamping path.

[0012] With the above structural design, the open-type locking frame can be directly clamped from the side of the rebar (without needing to be inserted from the end), which solves the problem of "difficulty in inserting the end" in the middle of the rebar and densely bundled areas, and is suitable for the installation needs of any part of the rebar.

[0013] Preferably, the clamping assembly includes clamping rods symmetrically arranged at the ends of the fixed rod and a blocking post threaded onto the fixed rod, with the middle part of the clamping rod hinged to the end of the fixed rod.

[0014] With the above structural design, the middle of the clamping rod is hinged to form a lever structure. By rotating the blocking column (moving along the axis of the fixed rod), the lower end of the clamping rod can be pushed to rotate, so that the upper end can symmetrically clamp the steel bar. The lever principle is used to reduce the force required for clamping, making the operation more labor-saving.

[0015] Preferably, the clamping rod includes a curved part that bends inward at the upper end to form an arc shape, and a rotating part that folds outward at the lower end to form an acute angle with the fixing rod. The upper end of the blocking post is a frustum shape that matches the angle of the rotating part. The lower ends of the fixing rod and the blocking post are both fixedly connected to a second anti-slip pad.

[0016] With the above structural design, the arc-shaped curved part fits the surface of the steel bar, increasing the clamping contact area, reducing deformation caused by excessive local stress on the steel bar, and improving clamping stability (preventing slippage); the frustum-shaped blocking post matches the acute angle of the rotating part of the clamping rod, allowing the rotating part to be pushed smoothly, ensuring uniform clamping of the clamping rod, preventing jamming, and improving the smoothness of operation; the second anti-slip pad increases the friction between the hand and the fixed rod and blocking post during operation, preventing slippage when adjusting the clamping force, reducing hand fatigue, and improving operational safety.

[0017] Compared with the prior art, the beneficial effects of this utility model are: This device can be directly clamped at any part of the reinforcing bar (including the middle, upper and other areas with significant swing), and can accurately support (outer support) or tighten (inner pull) the reinforcing bars on both sides of the part. The device adopts an open locking frame or symmetrical clamping rod structure, which can be directly clamped from the side of the reinforcing bar without the need to be sleeved from the end. It can be installed at any part of the reinforcing bar (including the middle and densely bundled areas), breaking through the limitation of existing devices that can only be operated at the beginning or end of the reinforcing bar. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model in use; Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present utility model; Figure 3 This is a top view of the structure of Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 5 This is a top view of the structure of Embodiment 2 of this utility model. Detailed Implementation

[0019] Example 1: Please see Figure 1 , Figure 2 , Figure 3 This utility model provides a technical solution: a rebar protective layer adjustment device, including a support sleeve 1, both ends of which are threaded with adjustment rods 2. The spacing of the rebar protective layer can be adjusted by screwing in or out the adjustment rods 2 according to specific conditions. The end of the adjustment rod 2 is rotatably connected to a fixing rod 3, which is coaxially arranged with the adjustment rod 2. A clamping component for clamping the rebar is fixedly connected to the fixing rod 3.

[0020] A first anti-slip pad 11 is fixedly attached to the outer wall of the support sleeve 1, and the outer wall of the support sleeve 1 is wrapped by the first anti-slip pad 11. An auxiliary rod 21 is fixedly connected to the front end of the adjusting rod 2. When screwing in or out the adjusting rod 2, the worker holds the support sleeve 1 with one hand and rotates the adjusting rod 2 through the auxiliary rod 21 with the other hand. The auxiliary rod 21 extends the lever arm of the adjusting rod 2, making it easier to rotate the adjusting rod 2. Especially when the reinforcing steel is under great stress, this reduces the labor intensity of the operator, speeds up the adjustment, and improves construction efficiency.

[0021] The end of the adjusting rod 2 is fixedly connected to a locking post 22. An annular groove 23 is formed on the locking post 22 near the adjusting rod 2. A stepped groove adapted to the locking post 22 is formed on the fixing rod 3. When the operator rotates the adjusting rod 2, the locking post 22 rotates relative to it within the stepped groove of the fixing rod 3. Through the threaded structure, the adjusting rod 22 moves outward or inward, and the locking post 22 carries the fixing rod 3 outward or inward. The clamping assembly connects with the reinforcing bar, thereby achieving precise support (outward support) or tension (inward tension) for the reinforcing bars on both sides of the device.

[0022] The clamping assembly includes a locking frame 41 fixedly connected to the fixing rod 3 and a locking bolt 42 threaded through the end of the locking frame 41. The locking frame 41 is an open frame structure with the opening direction adapted to the bar clamping path. One end of the opening of the locking frame 41 has a threaded hole that matches the locking bolt 41. The locking frame 41 is made of high-strength metal and is U-shaped or semi-circular.

[0023] Working principle: During use, the operator holds the support sleeve 1 (the first anti-slip pad 11 increases hand friction and prevents slipping), and according to the actual deviation of the steel reinforcement protective layer, rotates the auxiliary rod 21 to drive the adjusting rod 2 to screw in or out of the support sleeve 1. When the concrete cover of the reinforcing bar is greater than the design value, rotate the two adjusting rods 2 outwards so that the adjusting rods 2 are connected to the fixed rod 3 through the rotating connection structure of the locking column 22, and push the fixed rod 3 to move towards the template. At this time, the locking frame 41 (opening direction facing the reinforcing bar) is inserted from the side of the reinforcing bar and clamps the reinforcing bar. Tighten the locking bolt 42 so that its end is pressed against the surface of the reinforcing bar, and fix the reinforcing bar firmly. Continue to rotate the adjusting rods 2 outwards until the reinforcing bar is pushed to the point where the thickness of the concrete cover meets the design requirements.

[0024] When the concrete cover of the steel reinforcement is less than the design value, rotate the adjusting rod 2 inward, and the locking frame 41 will be driven by the fixing rod 3 to pull the steel reinforcement inward; similarly, the locking bolt 42 will be used to tighten the steel reinforcement to ensure that it is firmly clamped until the thickness of the concrete cover meets the standard.

[0025] During the adjustment process, the annular groove of the locking column 22 cooperates with the stepped groove of the fixing rod 3, which not only ensures the flexible rotation of the adjusting rod 2 and the fixing rod 3 (avoiding rigid deformation under stress), but also prevents the two from axially separating, ensuring the stable transmission of force and realizing the precise adjustment of the steel reinforcement protective layer.

[0026] Example 2: Please see Figure 4 , Figure 5 Compared with Example 1, Example 2 is an improvement. The clamping assembly includes clamping rods 51 symmetrically arranged at the ends of the fixed rod 3 and blocking posts 52 threaded onto the fixed rod 3. The middle part of the clamping rods 51 is hinged to the end of the fixed rod 3.

[0027] The clamping rod 51 includes a curved part 501 that bends inward at the upper end to form an arc shape, and a rotating part 502 that folds outward at the lower end to form an acute angle (45°) with the fixing rod 3. The upper end of the blocking post 52 is a frustum shape that matches the angle of the rotating part 502. The lower ends of the fixing rod 3 and the blocking post 52 are both fixedly connected to a second anti-slip pad. Anti-slip texture can be provided on the contact surface between the clamping rod 51 and the reinforcing bar.

[0028] For other parts, please refer to Example 1.

[0029] Working principle: The core adjustment logic of Embodiment 2 is the same as that of Embodiment 1, the difference lies in the operation method of the clamping component: When in use, adjust the position of the blocking post 52 on the fixing rod 3 according to the position of the reinforcing bar: When it is necessary to clamp the rebar, rotate the blocking column 52 upward (its frustum-shaped upper end matches the acute angle of the rotating part 502 of the clamping rod 51), pushing the rotating part 502 outward. Using the lever principle, the curved part 501 at the upper end of the clamping rod 51 is brought inward, and the arc-shaped curved part fits against the surface of the rebar and clamps it tightly. The second anti-slip pad at the lower end of the fixing rod 3 and the blocking column 52 can prevent the hand from slipping during operation, ensuring that it is effortless and stable when rotating the blocking column 52. When it is necessary to release the rebar, rotate the blocking column 52 downward until the blocking column 52 is disengaged from the lower end of the clamping rod 51. Then, the operator rotates the lower end of the clamping rod 51 so that the lower end of the clamping rod 51 fits against the outer wall of the fixing rod 3. The clamping rod 51 no longer clamps the rebar. Rotate the adjusting rod 2 inward to shorten the device, and then remove it.

[0030] When adjusting the position of the reinforcing bars, the adjusting rod 2 is rotated in or out by rotating the auxiliary rod 21: if the protective layer is too large, rotating the adjusting rod 2 outward pushes the fixing rod 3 and clamping rod 51 to push the reinforcing bars towards the formwork; if the protective layer is too small, rotating the adjusting rod 2 pulls the reinforcing bars inward. The symmetrical design of the clamping rod 51 ensures that the reinforcing bars are subjected to uniform force and avoids displacement. Combined with the rotating connection structure of the adjusting rod and the fixing rod, flexible and precise adjustment of the protective layer can be achieved.

[0031] After adjustment, the threaded self-locking property of the blocking column 52 can maintain the clamping state of the clamping rod 51, ensuring that the reinforcing bar does not loosen during the concrete pouring process and ensuring the stability of the protective layer thickness.

[0032] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the scope of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this utility model's implementation.

[0033] The present invention has been described above with reference to preferred embodiments, but the scope of protection of the present invention is not limited thereto. All technical solutions falling within the scope of the claims are within the scope of protection of the present invention. Various modifications can be made to the present invention, and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A device for adjusting a layer of reinforcement comprising a support sleeve (1), characterised in that: Both ends of the support sleeve (1) are threaded with adjusting rods (2), and the ends of the adjusting rods (2) are rotatably connected to a fixing rod (3). A clamping assembly for clamping the reinforcing bars is fixedly connected to the fixing rod (3).

2. A cover adjustment device according to claim 1, characterized in that: The first anti-slip pad (11) is fixedly attached to the outer wall of the support sleeve (1), and the front end of the adjusting rod (2) is fixedly connected to the auxiliary rod (21).

3. A cover regulating device according to claim 1, characterized in that: The end of the adjusting rod (2) is fixedly connected to the snap-fit ​​post (22), and an annular snap-fit ​​groove (23) is opened on one end of the snap-fit ​​post (22) near the adjusting rod (2). A stepped groove adapted to the snap-fit ​​post (22) is opened on the fixing rod (3).

4. A coverboard adjustment device according to any one of claims 1 to 3, characterised in that: The clamping assembly includes a locking frame (41) fixedly connected to the fixing rod (3) and a locking bolt (42) threaded through the end of the locking frame (41). The locking frame (41) is an open frame structure and the opening direction is adapted to the bar clamping path.

5. A coverboard adjustment device according to any one of claims 1 to 3, characterised in that: The clamping assembly includes clamping rods (51) symmetrically arranged at the ends of the fixed rod (3) and blocking posts (52) threaded onto the fixed rod (3). The middle part of the clamping rods (51) is hinged to the end of the fixed rod (3).

6. A cover adjustment device according to claim 5, wherein: The clamping rod (51) includes a curved part (501) that bends inward at the upper end to form an arc shape, and a rotating part (502) that folds outward at the lower end to form an acute angle with the fixing rod (3). The upper end of the blocking post (52) is a frustum shape that matches the angle of the rotating part (502). The lower ends of the fixing rod (3) and the blocking post (52) are both fixedly connected to the second anti-slip pad.

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