Concrete reinforcement bond stress detection device

Abstract

The utility model discloses a concrete reinforcement bond stress detection device which comprises a supporting mechanism, the supporting mechanism comprises a supporting plate with a center hole in the bottom, screws are arranged at four corners of the upper end of the supporting plate, a top plate is installed at the upper ends of the screws, and a limiting mechanism used for clamping and limiting a sample block is arranged on the supporting mechanism. A dial indicator is installed on the limiting mechanism, the limiting mechanism comprises an adjusting plate arranged on the screw, the adjusting plate is located between the supporting plate and the top plate, a rotating assembly is arranged on the lower side of the adjusting plate, and a clamping assembly is connected to the rotating assembly; through arrangement of an adjusting plate, a rotating assembly and a clamping assembly of the limiting mechanism, a worm of the rotating assembly drives a worm gear to rotate when rotating, the worm gear pushes a sliding seat at the upper end of a sliding rod to slide in a sliding groove through an arc-shaped through groove, and a right-angle clamping seat at the lower end of the sliding rod gets close to or away from a sample block to clamp or loosen four corners of the sample block; and the convenience and the stability of fixing when the sample block is tested are improved.

Description

Technical Field

[0001] This utility model belongs to the field of grip strength testing technology, specifically relating to a device for testing the grip strength of concrete reinforcing bars. Background Technology

[0002] Reinforced concrete, often simply referred to as reinforced concrete in engineering, is a composite material made by adding steel mesh, steel plates or fibers to concrete to improve its mechanical properties. It is the most common form of reinforced concrete. Bond strength is a physical quantity that concrete has the ability to resist the slippage of steel bars. Generally, bond strength refers to the shear stress along the contact surface between the steel bars and the concrete, which is also known as bond stress.

[0003] Currently, existing concrete rebar grip strength testing devices mainly fix the test block by locking it with screws on both sides of the support frame, which is inconvenient to operate and has poor fixing and clamping effect. Utility Model Content

[0004] The purpose of this invention is to provide a concrete rebar bond strength testing device to address the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a concrete rebar bond strength testing device, including a support mechanism, the support mechanism including a support plate with a central hole at the bottom, screws at the four corners of the upper end of the support plate, a top plate installed at the upper end of the screws, a pull rod installed on the top plate, a limiting mechanism for clamping and limiting the sample block on the support mechanism, a dial indicator installed on the limiting mechanism, and an adjustment plate installed on the screws.

[0006] The adjusting plate is located between the support plate and the top plate. A rotating assembly is provided on the lower side of the adjusting plate, and a clamping assembly is connected to the rotating assembly. The rotating assembly includes a worm gear rotatably connected to the lower end of the adjusting plate. A worm is meshed on one side of the worm gear. Supports for the worm are provided at both the front and rear of the lower end of the adjusting plate. Four sliding grooves are evenly distributed around the circumference of the adjusting plate. An arc-shaped through groove is provided on the worm gear opposite to the sliding groove. The arc-shaped through groove gradually moves towards the center. The clamping assembly includes a sliding rod passing through the arc-shaped through groove. A sliding seat is fixed to the upper end of the sliding rod, and a right-angle clamping seat is fixed to the lower end of the sliding rod.

[0007] The present invention further describes that the lower end of the adjusting plate is provided with a recessed platform, the worm gear is rotatably connected to the recessed platform, and the lower end of the adjusting plate is provided with a mounting base located outside the worm gear.

[0008] The present invention further illustrates that the worm gear is rotatably connected to the support, and a handwheel is installed at the front end of the worm gear through the support.

[0009] This utility model further illustrates that the slide block is slidably connected to the slide groove, the slide rod is slidably connected to the arc-shaped through groove, and the clamping surface of the right-angle clamping seat faces the middle position.

[0010] The present invention further illustrates that the adjusting plate is connected to the screw with a gap, and an adjusting nut is installed on the screw above and below the adjusting plate.

[0011] Compared with the prior art, the beneficial effects achieved by this utility model are: This utility model,

[0012] (1) By setting the adjustment plate, rotating component and clamping component of the limiting mechanism, the worm of the rotating component drives the worm wheel to rotate when it rotates. The worm wheel pushes the slide seat at the upper end of the slide rod to slide in the slide groove through the arc-shaped through groove, so that the right angle clamping seat at the lower end of the slide rod moves closer to or away from the sample block, clamping or releasing the four corners of the sample block, which improves the convenience and stability of fixing the sample block during testing. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the concrete rebar bond strength testing device described in this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the concrete rebar bond strength testing device after removing the sample block, as described in this utility model.

[0016] Figure 3 This is a structural diagram of the fixed limiting mechanism of the concrete rebar bond force testing device described in this utility model, in its exploded state.

[0017] Figure 4 yes Figure 3 Another perspective structural diagram.

[0018] In the diagram: 11. Support plate; 12. Screw; 13. Top plate; 14. Tie rod; 21. Adjusting plate; 201. Slide groove; 202. Sunk; 22. Worm gear; 221. Arc-shaped through groove; 23. Mounting base; 24. Support; 25. Worm gear; 26. Slide block; 27. Slide rod; 28. Right-angle clamping base; 3. Dial indicator. Detailed Implementation

[0019] The following detailed, non-limiting description of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present 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.

[0020] Please see Figure 1-4 The present invention provides a technical solution: a concrete rebar grip strength testing device, comprising a support mechanism, the support mechanism comprising a support plate 11 with a central hole at the bottom, screws 12 at the four corners of the upper end of the support plate 11, a top plate 13 installed at the upper end of the screws 12, a pull rod 14 installed on the top plate 13, a limiting mechanism for clamping and limiting the sample block on the support mechanism, a dial indicator 3 installed on the limiting mechanism, and an adjustment plate 21 installed on the screws 12.

[0021] The adjusting plate 21 is located between the support plate 11 and the top plate 13. A rotating assembly is provided on the lower side of the adjusting plate 21. A clamping assembly is connected to the rotating assembly. The rotating assembly includes a worm gear 22 rotatably connected to the lower end of the adjusting plate 21. A worm 25 is meshed on one side of the worm gear 22. Supports 24 for supporting the worm 25 are provided at both the front and rear of the lower end of the adjusting plate 21. Four grooves 201 are evenly distributed around the circumference of the adjusting plate 21. An arc-shaped through groove 221 is provided on the worm gear 22 opposite to the grooves 201. The arc-shaped through groove 221 gradually moves towards the center. The clamping assembly includes a slide rod 27 passing through the arc-shaped through groove 221. A slide seat 26 is fixed at the upper end of the slide rod 27. A right-angle clamping seat 28 is fixed at the lower end of the slide rod 27.

[0022] A recessed platform 202 is provided at the lower end of the adjusting plate 21, and the worm gear 22 is rotatably connected to the recessed platform 202. A mounting seat 23 is provided at the lower end of the adjusting plate 21 outside the worm gear 22 to facilitate the rotation of the worm gear 22.

[0023] The worm 25 is rotatably connected to the support 24, and a handwheel is installed at the front end of the worm 25 through the support 24, which makes it more convenient to rotate the worm 25.

[0024] The slide block 26 is slidably connected to the slide groove 201, the slide rod 27 is slidably connected to the arc-shaped through groove 221, and the clamping surface of the right-angle clamping seat 28 faces the middle position, which makes it more convenient to clamp and the clamping effect is better.

[0025] The adjusting plate 21 is connected to the screw 12 with a clearance. Adjusting nuts are installed on the screw 12 above and below the adjusting plate 21 to facilitate adjusting the vertical position of the adjusting plate 21.

[0026] In use, the sample block is placed on the support plate 11 with the long end of the steel bar on the sample block facing downward through the central hole. The nut on the screw 12 is rotated to move the adjusting plate 21 downward, so that the needle of the dial indicator 3 presses against the end face of the short steel bar at the upper end of the sample block. Then, by rotating the worm 25, the worm 25 meshes with the worm wheel 22 and rotates. When the worm wheel 22 rotates, it pushes the slide seat 26 at the upper end of the slide rod 27 to slide in the slide groove 201 through the arc-shaped through groove 221, so that the right-angle clamping seat 28 at the lower end of the slide rod 27 moves toward the sample block, and finally clamps and fixes the four corners of the sample block.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", 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 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.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A concrete steel bar gripping force detection device, comprising a support mechanism, the support mechanism comprising a support plate (11) provided with a central hole at the bottom, four screw rods (12) provided at the upper end of the support plate (11), a top plate (13) mounted at the upper end of the screw rods (12), and a pull rod (14) provided on the top plate (13), characterized in that: The support mechanism is provided with a limiting mechanism for clamping and limiting the sample block. A dial indicator (3) is installed on the limiting mechanism. The limiting mechanism includes an adjustment plate (21) provided on the screw (12). The adjusting plate (21) is located between the support plate (11) and the top plate (13). A rotating assembly is provided on the lower side of the adjusting plate (21), and a clamping assembly is connected to the rotating assembly. The rotating assembly includes a worm gear (22) rotatably connected to the lower end of the adjusting plate (21). A worm (25) is meshed on one side of the worm gear (22). Supports (24) for supporting the worm (25) are provided at both the front and rear of the lower end of the adjusting plate (21). The adjustment plate (21) has four circumferentially distributed sliding grooves (201). The worm gear (22) has a through arc-shaped groove (221) opposite to the sliding grooves (201). The arc-shaped groove (221) gradually moves towards the center. The clamping assembly includes a sliding rod (27) that passes through the arc-shaped groove (221). A sliding seat (26) is fixed at the upper end of the sliding rod (27), and a right-angle clamping seat (28) is fixed at the lower end of the sliding rod (27).

2. The device for testing the gripping force of a concrete reinforcing bar according to claim 1, wherein: The lower end of the adjustment plate (21) is provided with a recessed platform (202), the worm gear (22) is rotatably connected to the recessed platform (202), and the lower end of the adjustment plate (21) is provided with a mounting base (23) located outside the worm gear (22).

3. The device for testing the gripping force of a concrete reinforcing bar according to claim 1, wherein: The worm (25) is rotatably connected to the support (24), and a handwheel is installed at the front end of the worm (25) through the support (24).

4. The device for testing the gripping force of a concrete reinforcing bar according to claim 1, wherein: The slide block (26) is slidably connected to the slide groove (201), the slide rod (27) is slidably connected to the arc-shaped through groove (221), and the clamping surface of the right-angle clamping seat (28) faces the middle position.

5. The device for testing the gripping force of a concrete reinforcing bar according to claim 1, wherein: The adjusting plate (21) is connected to the screw (12) with a gap, and adjusting nuts are installed on the screw (12) above and below the adjusting plate (21).

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