Adjustable steel bar clamp device

Abstract

The utility model belongs to the technical field of bridge pier body construction, and particularly relates to an adjustable steel bar clamp device, which comprises an inner layer template and an outer layer template, inner layer main reinforcements which are annularly distributed at equal intervals are arranged on the outer side of the inner layer template, outer layer main reinforcements which are annularly distributed at equal intervals are arranged on the inner side of the outer layer template, and the outer layer main reinforcements are arranged on the outer side of the outer layer template. The top end of the inner-layer formwork is fixedly connected with a plurality of angle steel telescopic clamps distributed in the annular direction of the inner-layer formwork through bolts, the ends, away from the inner-layer formwork, of the angle steel telescopic clamps extend to the outer-layer formwork, and the interlayer spacing between the inner-layer main reinforcements and the outer-layer main reinforcements is controlled by adjusting the telescopic lengths of the angle steel telescopic clamps. Through the combined design of the angle steel telescopic clamp and the glass fiber rod, the circumferential spacing and the interlayer spacing of the steel bars and the thickness of a concrete protective layer are accurately controlled, the preparation work is completed on the ground in advance, the high-altitude operation risk is reduced, the detachable connection mode is adopted, recycling is facilitated, and the safety, the accuracy and the economical efficiency of hollow pier body construction are improved.

Description

Technical Field

[0001] This utility model belongs to the field of bridge pier construction technology, and in particular relates to an adjustable rebar clamp device. Background Technology

[0002] In the installation of vertical main reinforcement bars for hollow piers, it is usually necessary to manually install and weld the inner layer of circumferential support reinforcement bars first. Then, points are marked on the circumferential support reinforcement bars according to the design spacing, and workers then install the inner layer of vertical reinforcement bars according to the points. The outer layer of vertical main reinforcement bars also requires a similar installation method. However, the circumferential spacing positioning of the outer layer of vertical main reinforcement bars is not easy to control, requiring a large number of disposable reinforcement bars as support reinforcement bars for the vertical main reinforcement bars. Moreover, the operation is mostly high-altitude work, which increases the safety risks of on-site construction.

[0003] Furthermore, since this process involves working at height, construction workers face significant safety risks when constructing the outer ring main reinforcement. Additionally, as the construction height increases, the spacing between the reinforcement bars and the wall thickness of the cross-section also change, making adjustments to the reinforcement spacing after binding quite difficult. After multiple adjustments, construction workers often become exhausted and ultimately rely on experience to observe whether the reinforcement bars are aligned to determine if the spacing meets requirements.

[0004] During acceptance, technicians often measure the total spacing of a certain number of steel bars to see if it meets the design requirements. However, this cannot guarantee that the spacing is uniform, which may create potential quality problems for the construction of the next pier segment. Utility Model Content

[0005] In view of the technical problems existing in the background art, this utility model provides an adjustable rebar clamp device, which aims to solve the technical problems in the construction of hollow piers, such as inaccurate control of the circumferential spacing of rebars and the spacing between the inner and outer main reinforcement layers, difficulty in adjusting with changes in the pier cross section, difficulty in accurately controlling the thickness of the concrete protective layer, high risk of high-altitude operation, and low construction efficiency. It provides a safe, efficient and accurate rebar positioning solution for the construction of hollow piers.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] An adjustable rebar clamping device includes an inner template and an outer template. The outer side of the inner template is provided with inner main reinforcement bars distributed circumferentially at equal intervals, and the inner side of the outer template is provided with outer main reinforcement bars distributed circumferentially at equal intervals. The top of the inner template is fixedly connected with multiple angle steel expansion clamps distributed circumferentially along the inner template by bolts, and the end of the angle steel expansion clamps away from the inner template extends to the outer template. The layer spacing between the inner and outer main reinforcement bars is controlled by adjusting the expansion length of the angle steel expansion clamps.

[0008] Optionally, the top of the angle steel telescopic clamp is provided with several fiberglass rods, which are arranged in a ring around the template, and the inner main reinforcement and the outer main reinforcement are respectively connected to the fiberglass rods.

[0009] Optionally, the angle steel telescopic clamp includes an inner layer of angle steel and an outer layer of angle steel. Both the inner and outer layers of angle steel have adjustment holes in the middle. The inner and outer layers of angle steel are connected by an overlapping joint. After being fixed by adjustment bolts in the adjustment holes, the inner and outer layers of angle steel form an adjustable support structure. Both the inner and outer layers of angle steel have U-shaped grooves at the top.

[0010] Optionally, the fiberglass rod includes an inner fiberglass rod and an outer fiberglass rod, both of which are ring structures. The inner fiberglass rod is engaged with the U-shaped groove at the top of the inner angle steel, and the outer fiberglass rod is engaged with the U-shaped groove at the top of the outer angle steel.

[0011] Optionally, the outer ends of both the inner and outer fiberglass rods are fitted with multiple circumferentially spaced positioning clamps. The positioning clamps include positioning rings that fit into the inner and outer fiberglass rods. The inner wall of the positioning rings is provided with a centering groove, and the surface of the centering groove is provided with an anti-slip groove.

[0012] Optionally, a sleeve is fixedly connected to the outer wall of the positioning ring, and a locking rod is slidably connected to the inner wall of the sleeve. The locking rod passes through the positioning ring, and a hemispherical groove is opened at the end of the locking rod near the centering groove. A limiting plate is fixedly connected to the end of the locking rod away from the centering groove.

[0013] Optionally, a return spring is slidably connected to the outer end of the locking rod. The end of the return spring near the limiting plate abuts against the limiting plate, and the end of the return spring away from the limiting plate abuts against the sleeve. A locking nut is threadedly connected to the end of the locking rod away from the positioning ring.

[0014] Optionally, the inner main reinforcement bars and the positioning clamps on the inner fiberglass rods, as well as the outer main reinforcement bars and the positioning clamps on the outer fiberglass rods, are all fixedly connected by tie wires. The tie wires are wrapped and fixed with the positioning rings to ensure the accurate positioning of the reinforcement bars.

[0015] This utility model has the following advantages and beneficial effects:

[0016] 1. Circumferential Spacing Positioning Control: Through the combined design of positioning clamps and fiberglass rods, precise control of the circumferential spacing of the reinforcing bars is achieved. At the same time, the U-shaped grooves opened on the inner and outer angle steel according to the design protective layer thickness and the clamping design of the fiberglass rods allow the main reinforcement to be installed close to the fiberglass rods, thus achieving precise control of the concrete protective layer thickness without the need for additional measurement and calibration. This solves the dual problems of uneven reinforcement spacing and difficulty in controlling the protective layer thickness in traditional construction, improves the construction quality and structural safety of hollow piers, and meets the stringent engineering quality standards.

[0017] 2. Main reinforcement spacing control: Angle steel expansion clamps with overlapping inner and outer angle steel are used, along with an adjustable support structure consisting of a central adjustment hole and adjusting bolts. This ensures that the spacing between the inner and outer main reinforcement layers can be flexibly adjusted according to changes in the pier cross-section. The overlapping design provides sufficient adjustment range to meet the construction needs of hollow piers of different sizes. This adaptive design improves the versatility and reusability of the clamps and saves engineering costs.

[0018] 3. Positioning clamp: The positioning clamp adopts an automatic centering design with a combination of centering groove and hemispherical groove to ensure that the reinforcing bars are on the same horizontal line. The combination structure of inner anti-slip groove, outer sleeve and locking rod prevents the positioning ring from sliding on the fiberglass rod. The ingenious design of return spring and locking nut makes the clamp adjustment and locking more convenient and reliable. This innovative structure, which integrates centering, anti-slip, anti-damage and easy adjustment, solves the multiple problems of traditional clamps such as poor fixation, complicated operation and easy damage to equipment, and greatly improves the accuracy and stability of reinforcing bar positioning. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the adjustable rebar clamp device of this utility model;

[0020] Figure 2 This is a top view of the adjustable rebar clamp device of this utility model;

[0021] Figure 3 This is a first partial view of the adjustable rebar clamp device of this utility model;

[0022] Figure 4 This is a second partial view of the adjustable rebar clamp device of this utility model;

[0023] Figure 5 This is a structural diagram of the angle steel telescopic clamp of this utility model;

[0024] Figure 6 This is a structural diagram of the positioning clamp of this utility model;

[0025] Figure 7 This is the main view of the positioning fixture.

[0026] Figure 8 This utility model Figure 7 A cross-sectional view along the AA direction.

[0027] Reference numerals in the attached diagram: 1. Inner template; 2. Outer template; 3. Inner main reinforcement; 4. Outer main reinforcement; 5. Angle steel telescopic clamp; 51. Inner angle steel; 52. Outer angle steel; 6. Fiberglass rod; 61. Inner fiberglass rod; 62. Outer fiberglass rod; 7. Adjustment hole; 8. U-shaped groove; 9. Positioning ring; 10. Centering groove; 11. Anti-slip groove; 12. Sleeve; 13. Locking rod; 14. Hemispherical groove; 15. Limiting plate; 16. Return spring; 17. Locking nut. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] like Figures 1-2 As shown, this utility model provides an adjustable rebar clamp device for precise positioning of the inner main reinforcement 3 and the outer main reinforcement 4 during the construction of a hollow pier. It includes an inner template 1 and an outer template 2. The outer side of the inner template 1 is provided with circumferentially spaced inner main reinforcement 3, and the inner side of the outer template 2 is provided with circumferentially spaced outer main reinforcement 4. Multiple angle steel telescopic clamps 5, distributed circumferentially along the inner template 1, are fixedly connected to the top of the inner template 1 by bolts. The end of the angle steel telescopic clamp 5 away from the inner template 1 extends to the outer template 2. By adjusting the telescopic length of the angle steel telescopic clamp 5, the layer spacing between the inner main reinforcement 3 and the outer main reinforcement 4 can be controlled. This can be adjusted according to changes in the pier cross-section. The angle steel telescopic clamp 5 can precisely control the layer spacing of the main reinforcement installation and simultaneously precisely control the thickness of the concrete protective layer, effectively improving the quality of rebar installation.

[0031] The top of the angle steel telescopic clamp 5 is equipped with several fiberglass rods 6, which are arranged in a ring along the template. The inner main reinforcement 3 and the outer main reinforcement 4 are respectively connected to the fiberglass rods 6. The fiberglass rods 6 are made of glass fiber reinforced composite material with an elastic modulus of 20-40 GPa, which can adapt to both straight and curved sections of the pier structure. Specifically, the stiffness of the fiberglass rods 6 can support the positioning of the main reinforcement and maintain its own shape without deformation, ensuring accurate spacing between the main reinforcement layers. At the same time, the yield strength and elastic deformation capacity of the material enable the fiberglass rods 6 to bend according to a predetermined radius during the construction of the curved section of the pier, adapting to the curved surface structure of the pier, effectively solving the problem of uneven spacing between the main reinforcement layers in the straight and curved sections of the pier construction.

[0032] like Figures 3-5 As shown, the angle steel telescopic clamp 5 includes an inner angle steel 51 and an outer angle steel 52. Both the inner angle steel 51 and the outer angle steel 52 have adjustment holes 7 in the middle. The inner angle steel 51 and the outer angle steel 52 are connected by an overlapping joint. After being fixed by the adjustment bolts in the adjustment holes 7, the inner angle steel 51 and the outer angle steel 52 form an adjustable support structure. This telescopic overlapping design allows the clamp to be adjusted according to the changes in the cross-section of the pier, effectively improving the applicability of the clamp and allowing for repeated use after a single investment, thus saving costs.

[0033] Both the inner angle steel 51 and the outer angle steel 52 have U-shaped grooves 8 at their tops. These grooves are designed to maintain the concrete cover thickness. Circumferential fiberglass rods 6 are installed within the U-shaped grooves 8 to position the main reinforcement bars. By ensuring the main reinforcement bars are tightly fitted to the fiberglass rods 6 during installation, the concrete cover thickness can be controlled. The concrete cover thickness refers to the distance from the concrete surface to the outermost edge of the outermost reinforcement bar, and is a key parameter for protecting the reinforcement bars from environmental erosion and ensuring structural durability. This is essentially the outermost main reinforcement bar. 4. The concrete layer between the outer formwork 2 or the inner main reinforcement 3 and the inner formwork 1. The fiberglass rod 6 includes an inner fiberglass rod 61 and an outer fiberglass rod 62. Both the inner fiberglass rod 61 and the outer fiberglass rod 62 are ring structures. The inner fiberglass rod 61 is engaged with the U-shaped groove 8 at the top of the inner angle steel 51, and the outer fiberglass rod 62 is engaged with the U-shaped groove 8 at the top of the outer angle steel 52. The fiberglass rod has a certain rigidity and flexibility, which can solve the problem of uneven spacing of steel bars in straight sections and arc sections at the same time, making the construction more adaptable.

[0034] During use, the angle steel telescopic clamp 5 is installed and fixed using the existing upper and lower splicing bolt holes on the top of the inner layer template 1 of the pier body. Through holes are opened on both the inner angle steel 51 and the outer angle steel 52 for bolts to pass through. The inner angle steel 51 is fixedly connected to the inner layer template 1 by bolts, and the outer angle steel 52 overlaps with the outer template 2. Then, the inner fiberglass rod 61 is installed into the U-shaped groove 8 at the top of the inner angle steel 51. After installation, the inner main reinforcement 3 is fixed to the positioning clamp on the inner fiberglass rod 61 using tie wire. Next, adjust the overlap length of the two inner angle steels 51 and outer angle steels 52 according to the designed layer spacing. Then, install the outer fiberglass rod 62 into the U-shaped groove 8 at the top of the outer angle steel 52 in the same way. Use tie wire to fix the outer main reinforcement 4 to the positioning clamp on the outer fiberglass rod 62. The pre-positioned positioning clamp can accurately position the circumferential spacing of the inner main reinforcement 3 and the outer main reinforcement 4. When installing the main reinforcement, tie wire is used to bind and fix the main reinforcement to the positioning clamp, so as to achieve precise control of the main reinforcement spacing.

[0035] like Figures 6-8 As shown, the outer ends of the inner fiberglass rod 61 and the outer fiberglass rod 62 are each fitted with a plurality of circumferentially spaced positioning clips. The positioning clips include positioning rings 9 that fit into the inner fiberglass rod 61 and the outer fiberglass rod 62. The inner wall of the positioning ring 9 is provided with a centering groove 10, and the groove surface of the centering groove 10 is provided with an anti-slip groove 11. The centering groove 10 enables the positioning clips to be automatically centered and placed on the same horizontal line, which is convenient for binding. The anti-slip groove 11 can prevent the positioning ring 9 from sliding relative to the fiberglass rod 6, which would affect the circumferential spacing of the main reinforcement.

[0036] A sleeve 12 is fixedly connected to the outer wall of the positioning ring 9, and a locking rod 13 is slidably connected to the inner wall of the sleeve 12. The locking rod 13 passes through the positioning ring 9. A hemispherical groove 14 is provided at the end of the locking rod 13 near the centering groove 10. The hemispherical groove 14 cooperates with the centering groove 10 to center the fiberglass rod, while preventing the locking rod 13 from damaging the fiberglass rod. In particular, the fiberglass rod 6 with a curved arrangement is prone to breakage after repeated use, which may cause safety hazards. This effectively avoids damage to the fiberglass rod caused by traditional bolt locking and extends the service life of the fiberglass rod 6. A limiting plate 15 is fixedly connected to the end of the locking rod 13 away from the centering groove 10.

[0037] A return spring 16 is slidably connected to the outer end of the locking rod 13. The end of the return spring 16 near the limiting plate 15 abuts against the limiting plate 15, and the end of the return spring 16 away from the limiting plate 15 abuts against the sleeve 12. A locking nut 17 is threadedly connected to the end of the locking rod 13 away from the positioning ring 9.

[0038] The inner main reinforcement 3 and the inner fiberglass rod 61, and the outer main reinforcement 4 and the outer fiberglass rod 62 are all fixedly connected by tie wires. The tie wires are wrapped and fixed with the positioning ring 9 to ensure the precise positioning of the reinforcement. This tie wire fixing method is simple and effective. The clamps and fixtures are easy to process, manufacture and install. The clamps themselves are lightweight and convenient for construction workers to use.

[0039] like Figure 3 As shown, when using it, firstly, splice the fiberglass rods 6 into a ring on the pedestrian step and mark the points according to the designed steel bar spacing. Then, fix the positioning clamps on the fiberglass rods 6 at the corresponding points and fix the positioning rings 9 on the marked points on the fiberglass rods 6. The preparatory work done on the ground in advance reduces the risk of working at height and improves construction safety.

[0040] like Figure 3 and Figures 6-8 As shown, when installing the positioning clamp, the positioning ring 9 is fitted onto the fiberglass rod 6 and positioned at the pre-designed mark point. The locking nut 17 is driven to rotate, and the locking nut 17 pushes the limiting plate 15 to move. The limiting plate 15 pushes the locking rod 13 to move together. The return spring 16, which abuts against the limiting plate 15, is compressed. The hemispherical groove 14 at the end of the locking rod 13 is embedded in the fiberglass rod 6 and works together with the centering groove 10 to make the positioning clamp located at the center position of the fiberglass rod 6. The locking nut 17 is continuously rotated until the positioning clamp is tightened. When disassembly is required, the locking nut 17 is simply rotated in the direction, and the locking rod 13 returns to the initial position under the elastic force of the return spring 16, leaving space for the disassembly of the positioning clamp.

[0041] After all the reinforcing bars are tied to the construction height, loosen the angle steel expansion clamp 5 and the positioning clamp, and then remove them. The clamps and fixtures are connected, adjusted, and fixed by bolts, which makes disassembly convenient, allows for reuse, and improves economic efficiency.

[0042] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An adjustable rebar clamping device, comprising an inner template (1) and an outer template (2), wherein the outer side of the inner template (1) is provided with circumferentially equally spaced inner main reinforcement bars (3), and the inner side of the outer template (2) is provided with circumferentially equally spaced outer main reinforcement bars (4), characterized in that: The top of the inner template (1) is fixedly connected with multiple angle steel telescopic clamps (5) distributed circumferentially along the inner template (1) by bolts, and the end of the angle steel telescopic clamp (5) away from the inner template (1) extends to the outer template (2). The layer spacing between the inner main reinforcement (3) and the outer main reinforcement (4) is controlled by adjusting the telescopic length of the angle steel telescopic clamp (5).

2. The adjustable rebar clamp device according to claim 1, characterized in that: The top of the angle steel telescopic clamp (5) is provided with several fiberglass rods (6), which are arranged in a ring along the template. The inner main reinforcement (3) and the outer main reinforcement (4) are respectively connected to the fiberglass rods (6).

3. The adjustable rebar clamp device according to claim 1, characterized in that: The angle steel telescopic clamp (5) includes an inner angle steel (51) and an outer angle steel (52). The inner angle steel (51) and the outer angle steel (52) are both provided with adjustment holes (7) in the middle. The inner angle steel (51) and the outer angle steel (52) are connected by an overlapping joint. The inner angle steel (51) and the outer angle steel (52) are fixed by adjustment bolts in the adjustment holes (7) to form an adjustable support structure. The top of the inner angle steel (51) and the outer angle steel (52) are both provided with U-shaped grooves (8).

4. The adjustable rebar clamp device according to claim 2, characterized in that: The fiberglass rod (6) includes an inner fiberglass rod (61) and an outer fiberglass rod (62), and both the inner fiberglass rod (61) and the outer fiberglass rod (62) are annular structures. The inner fiberglass rod (61) is engaged with the U-shaped groove (8) at the top of the inner angle steel (51), and the outer fiberglass rod (62) is engaged with the U-shaped groove (8) at the top of the outer angle steel (52).

5. The adjustable rebar clamp device according to claim 4, characterized in that: The outer ends of the inner fiberglass rod (61) and the outer fiberglass rod (62) are each fitted with a plurality of circumferentially spaced positioning clamps. The positioning clamps include positioning rings (9) that are fitted with the inner fiberglass rod (61) and the outer fiberglass rod (62). The inner wall of the positioning ring (9) is provided with a centering groove (10), and the groove surface of the centering groove (10) is provided with an anti-slip groove (11).

6. The adjustable rebar clamp device according to claim 5, characterized in that: A sleeve (12) is fixedly connected to the outer wall of the positioning ring (9), and a locking rod (13) is slidably connected to the inner wall of the sleeve (12). The locking rod (13) passes through the positioning ring (9). A hemispherical groove (14) is provided at one end of the locking rod (13) near the centering groove (10), and a limiting plate (15) is fixedly connected at the other end of the locking rod (13) away from the centering groove (10).

7. An adjustable rebar clamping device according to claim 6, characterized in that: The outer end of the locking rod (13) is slidably connected to a return spring (16). The end of the return spring (16) near the limiting plate (15) abuts against the limiting plate (15), and the end of the return spring (16) away from the limiting plate (15) abuts against the sleeve (12). The end of the locking rod (13) away from the positioning ring (9) is threadedly connected to a locking nut (17).

8. The adjustable rebar clamp device according to claim 4, characterized in that: The inner main reinforcement (3) and the positioning clamps on the inner fiberglass rod (61), and the outer main reinforcement (4) and the positioning clamps on the outer fiberglass rod (62) are all fixedly connected by tie wires. The tie wires are wrapped and fixed with the positioning ring (9) to ensure the accurate positioning of the reinforcement.

Images