A device for detecting the strength of engineering reinforcing bars

Abstract

The application discloses an engineering reinforcing steel strength detection device, and belongs to the field of engineering reinforcing steel strength detection.The engineering reinforcing steel strength detection device comprises a support frame, a hydraulic telescopic rod fixedly installed at the top end of the support frame, a load sensor fixedly installed at the movable end of the hydraulic telescopic rod, a pressure head fixedly installed at the bottom end of the load sensor, and eccentric rollers rotationally installed at the bottom end of the support frame and symmetrically arranged, wherein the top end of each eccentric roller is provided with a V-shaped supporting groove for supporting the end of a steel sample.The engineering reinforcing steel strength detection device effectively alleviates the stress concentration problem of a traditional clamp through the rotation characteristics of the eccentric rollers, improves the accuracy of test results, realizes real-time monitoring of angles and pressures through the combination of a digital inclinometer and the load sensor, ensures that the test process meets the standards, and simplifies the operation process and reduces human errors through the integration of data acquisition and equipment control functions of the controller.

Description

Technical Field

[0001] This application relates to the field of engineering steel reinforcement strength testing technology, specifically an engineering steel reinforcement strength testing device. Background Technology

[0002] Reinforcing steel strength testing in engineering projects is an activity that systematically tests the mechanical properties (especially strength) of reinforcing steel to ensure that its quality meets design requirements and standards. Its core purpose is to verify, through scientific testing methods, whether the strength indicators (such as yield strength and tensile strength) of the reinforcing steel meet engineering requirements, thereby ensuring structural safety, controlling project quality, and avoiding safety hazards or economic losses caused by substandard materials.

[0003] Traditional clamps commonly used in steel bar strength testing devices are designed with "fixing the specimen" as their core objective. For example, they consist of two symmetrical V-shaped blocks with V-groove angles typically of 90° or 120°. The V-shaped blocks are driven to close by bolts or hydraulic devices to clamp the steel bar specimen. Therefore, when the steel bar specimen is bent, the two clamping ends may experience stress concentration, leading to localized plastic deformation or even fracture. Stress concentration can cause the test results to deviate from the true strength, especially when there are geometrical abrupt changes in the contact surface of the clamp, which makes the problem more significant.

[0004] Therefore, this application provides a steel reinforcement strength testing device for engineering applications to solve the above-mentioned problems. Utility Model Content

[0005] This application provides a steel reinforcement strength testing device for engineering applications, which aims to solve the problem mentioned in the background art that the traditional clamps of existing steel reinforcement strength testing devices cannot effectively alleviate this additional stress due to the lack of stress dispersion design.

[0006] To achieve the above objectives, this application provides the following technical solution: a steel reinforcement strength testing device for engineering applications, comprising a support frame, a hydraulic telescopic rod fixedly mounted on the top of the support frame via a fixing frame, a load sensor fixedly mounted on the movable end of the hydraulic telescopic rod, a pressure head fixedly mounted on the bottom end of the load sensor, and eccentric rollers rotatably mounted on the bottom end of the support frame and symmetrically arranged. The top end of the eccentric roller has a V-shaped groove supporting the end of the steel reinforcement sample, and the center of gravity of the eccentric roller is at the end away from the V-shaped groove. A digital inclinometer is fixedly mounted on the side of one of the V-shaped grooves. The side of the fixing frame has a controller connected to the output end of the load sensor for controlling the lifting and lowering of the hydraulic telescopic rod and displaying the load value. In this way, the rotational characteristics of the eccentric roller effectively alleviate the stress concentration problem of traditional clamps, improving the accuracy of test results. The combination of the digital inclinometer and the load sensor enables real-time monitoring of angle and pressure, ensuring that the testing process meets standards. The controller integrates data acquisition and equipment control functions, simplifying the operation process and reducing human error.

[0007] Preferably, the controller has a display screen and buttons for operating the hydraulic telescopic rod at its front end.

[0008] Preferably, the support frame includes a front upright plate and a rear upright plate standing side by side, a base plate fixedly connected to the bottom ends of the front upright plate and the rear upright plate, and double-headed bolts connected to the front upright plate and the rear upright plate at both ends respectively, wherein the double-headed bolts have multiple sets and are symmetrically distributed between the front upright plate and the rear upright plate.

[0009] Preferably, the front plate and the rear plate are respectively provided with a front sliding groove and a rear sliding groove in the middle, and the pressure head is fixedly connected to both sides with limiting sliders that are slidably connected to the front sliding groove and the rear sliding groove respectively.

[0010] Preferably, the base plate has a plurality of mounting holes.

[0011] Preferably, the bottom of both the front and rear uprights are provided with a plurality of adjusting slots arranged in a linear array, and the center of each eccentric roller is rotatably connected to a positioning shaft, which is engaged in the adjusting slot.

[0012] Preferably, the front side of the front plate has a length scale line at the position corresponding to the position below the adjustment slot.

[0013] The steel reinforcement strength testing device used in this project effectively alleviates the stress concentration problem of traditional clamps due to the rotational characteristics of the eccentric roller, improving the accuracy of test results. The combination of digital display inclinometer and load sensor enables real-time monitoring of angle and pressure, ensuring that the testing process meets standards. The controller integrates data acquisition and equipment control functions, simplifying the operation process and reducing human error.

[0014] The steel reinforcement strength testing device used in this project can be adapted to steel reinforcement samples of different lengths by adjusting the cooperation between the slot and the positioning pin, eliminating the need to pre-cut the samples, thus reducing material waste and operating steps.

[0015] The steel reinforcement strength testing device used in this project has a simple overall structure and is easy to disassemble, assemble, and carry. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a steel reinforcement strength testing device for engineering applications. Figure 2 This is a schematic diagram of the inner structure of a steel reinforcement strength testing device for engineering applications.

[0017] In the picture: 1. Support frame; 11. Front upright plate; 111. Front slide rail; 12. Rear upright plate; 121. Rear slide rail; 13. Fixing frame; 131. Controller; 14. Base plate; 141. Mounting hole; 15. Double-headed locking bolt; 16. Adjustment slot; 2. Hydraulic telescopic rod; 3. Load sensor; 4. Pressure head; 41. Limit slider; 5. Eccentric roller; 51. V-groove; 52. Positioning clip; 6. Digital display inclinometer. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] Example 1 This embodiment provides a device for testing the strength of reinforcing steel bars used in engineering, such as... Figures 1-2 As shown, the steel reinforcement strength testing device used in this project includes a support frame 1, a hydraulic telescopic rod 2 fixedly installed at the top of the support frame 1 via a fixing frame 13, a load sensor 3 fixedly installed at the movable end of the hydraulic telescopic rod 2, a pressure head 4 fixedly installed at the bottom end of the load sensor 3, and an eccentric roller 5 rotatably installed at the bottom end of the support frame 1 and symmetrically arranged. The top end of the eccentric roller 5 has a V-shaped groove 51 for supporting the end of the steel reinforcement sample. The center of gravity of the eccentric roller 5 is at the end away from the V-shaped groove 51. A digital display inclinometer 6 is fixedly installed on the side of one of the V-shaped grooves 51. The side of the fixing frame 13 has a controller 131 connected to the output end of the load sensor 3 for controlling the lifting and lowering of the hydraulic telescopic rod 2 and displaying the load value.

[0020] In use, the steel bar sample 7 is placed horizontally on the V-shaped grooves 51 of the two eccentric rollers 5. The pressure point of the sample is adjusted to be directly below the pressure head 4. The hydraulic telescopic rod 2 is activated, and the pressure head 4 moves downward at a low speed. When the pressure head 4 contacts the upper surface of the sample, the load sensor 3 triggers the controller 131 to enter the test mode. As the pressure increases, the eccentric rollers 5 rotate under the reaction force, and the contact point between the V-shaped grooves 51 and the sample spreads outward to disperse the end stress. The digital inclinometer 6 displays the angle data in real time, and the load sensor 3 continuously records the pressure-displacement curve. When the sample yields or breaks, the controller 131 locks the peak load and calculates the tensile strength, yield strength, and other indicators.

[0021] Specifically, the controller 131 has a display screen and buttons for operating the hydraulic telescopic rod 2 at the front end; the display screen provides intuitive data visualization, avoiding reliance on external instruments; the buttons enable localized control, reducing reliance on the host computer.

[0022] Specifically, the support frame 1 includes a front upright plate 11 and a rear upright plate 12 standing side by side, a base plate 14 fixedly connected to the bottom of the front upright plate 11 and the rear upright plate 12, and double-headed bolts 15 connected to the front upright plate 11 and the rear upright plate 12 at both ends respectively. The double-headed bolts 15 are arranged in multiple sets and symmetrically distributed between the front upright plate 11 and the rear upright plate 12. The front upright plate 11 and the rear upright plate 12 are fixed in parallel through the base plate 14 to form a gantry frame. The top crossbeam carries the hydraulic system, and the bottom accommodates the eccentric roller 5. The double-headed bolts 15 form multiple sets of lateral constraints to enhance the overall stability of the support frame 1.

[0023] Furthermore, the front plate 11 and the rear plate 12 are respectively provided with a front slide groove 111 and a rear slide groove 121 in the middle, and the pressure head 4 is fixedly connected to both sides with limiting sliders 41 that are slidably connected to the front slide groove 111 and the rear slide groove 121 respectively; when the hydraulic telescopic rod 2 drives the pressure head 4 to rise and fall, the limiting sliders 42 slide along the slide groove, restricting the lateral degree of freedom of the pressure head 4. The cooperation between the slide groove and the slider ensures that the pressure head 4 only moves along the axial direction, avoiding the tilting of the pressure head caused by the uneven load of the hydraulic system, and eliminating the interference of lateral force on the sample.

[0024] Furthermore, the base plate 14 has several mounting holes 141; the device is fixed to the ground or test platform by bolts to eliminate vibration displacement during testing.

[0025] Example 2 Unlike Example 1, since the distance between the two eccentric rollers 5 is fixed, it cannot accommodate steel bar samples of different lengths. Each time, the steel bar sample needs to be cut to a suitable length, which is cumbersome. Therefore, the bottom of the front plate 11 and the rear plate 12 are provided with several adjustment slots 16 arranged in a linear array. The center of each eccentric roller 5 is rotatably connected to a positioning shaft 52, which is engaged in the adjustment slot 16. In addition, the front side of the front plate 11 has a length scale line at the position below the adjustment slot 16.

[0026] The snap-fit ​​structure between the positioning pin 52 and the adjusting slot 16 provides a rigid connection, ensuring that the eccentric roller 5 will not shift or loosen due to force during the test, thus ensuring test stability. Each adjusting slot 16 corresponds to a specific horizontal position. The positioning pin 52 at the center of the eccentric roller 5 can be inserted into any adjusting slot 16. By selecting different slot positions, the distance between the two eccentric rollers 5 can be flexibly adjusted. The length scale line on the front side of the front plate 11 directly marks the horizontal distance corresponding to the slot position. The operator can quickly locate the required distance through the scale without the need for additional measuring tools.

[0027] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A device for testing the strength of reinforcing steel bars used in engineering, characterized in that: The device includes a support frame (1), a hydraulic telescopic rod (2) fixedly mounted on the top of the support frame (1) via a fixing frame (13), a load sensor (3) fixedly mounted on the movable end of the hydraulic telescopic rod (2), a pressure head (4) fixedly mounted on the bottom end of the load sensor (3), and an eccentric roller (5) rotatably mounted on the bottom end of the support frame (1) and symmetrically arranged. The top end of the eccentric roller (5) has a V-shaped groove (51) for supporting the end of the steel bar sample. The center of gravity of the eccentric roller (5) is at the end away from the V-shaped groove (51). A digital display inclinometer (6) is fixedly mounted on the side of one of the V-shaped grooves (51). The side of the fixing frame (13) has a controller (131) connected to the output end of the load sensor (3) for controlling the lifting and lowering of the hydraulic telescopic rod (2) and displaying the load value.

2. The engineering steel reinforcement strength testing device according to claim 1, characterized in that: The controller (131) has a display screen and buttons for controlling the hydraulic telescopic rod (2) at the front end.

3. The engineering steel reinforcement strength testing device according to claim 2, characterized in that: The support frame (1) includes a front upright plate (11) and a rear upright plate (12) standing side by side, a base plate (14) fixedly connected to the bottom ends of the front upright plate (11) and the rear upright plate (12), and double-headed bolts (15) connected to the front upright plate (11) and the rear upright plate (12) at both ends respectively. The double-headed bolts (15) have multiple sets and are symmetrically distributed between the front upright plate (11) and the rear upright plate (12).

4. The engineering steel reinforcement strength testing device according to claim 3, characterized in that: The front plate (11) and the rear plate (12) are respectively provided with a front slide groove (111) and a rear slide groove (121), and the pressure head (4) is fixedly connected to both sides with limiting sliders (41) that are slidably connected to the front slide groove (111) and the rear slide groove (121).

5. The engineering steel reinforcement strength testing device according to claim 4, characterized in that: The base plate (14) has several mounting holes (141).

6. The engineering steel reinforcement strength testing device according to claim 5, characterized in that: The bottom of the front plate (11) and the rear plate (12) are provided with a number of adjustment slots (16) arranged in a linear array. The center of the eccentric roller (5) is rotatably connected to a positioning shaft (52), which is engaged in the adjustment slot (16).

7. The engineering steel reinforcement strength testing device according to claim 6, characterized in that: The front plate (11) has a length scale line at the position below the adjustment slot (16) on the front side.

Images