A device for detecting the strength of a building reinforcement
By introducing buffer and disassembly components into the building rebar strength testing device, the impact problem when the rebar breaks is solved, the device is protected and can be quickly adapted to rebars of various specifications, thus improving the testing accuracy and lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUIZHOU CONSTR GRP ENG CONSTR SUPERVISION CO LTD
- Filing Date
- 2025-09-01
- Publication Date
- 2026-07-31
AI Technical Summary
Existing steel reinforcement strength testing devices lack an effective buffering mechanism at the moment of steel reinforcement fracture, resulting in a hard impact between the pressure head and the main body of the device, causing deformation of the pressure head or damage to the internal parts of the device, affecting the testing accuracy and lifespan.
The buffer assembly includes a buffer pad, a sliding column, a damper, and a buffer spring. The outer pressure block is driven by a hydraulic pump to contact the buffer pad, buffering the impact force when the steel bar breaks. The inner pressure block can be quickly replaced by disassembling the assembly to accommodate steel bars of different diameters.
It effectively reduces the impact force when the steel bar breaks, avoids deformation of the pressure block or damage to the device, extends the life of the device, and improves the versatility and detection accuracy of the device.
Smart Images
Figure CN224581302U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steel bar strength testing technology, and in particular to a strength testing device for building steel bars. Background Technology
[0002] In the field of construction engineering, steel reinforcement, as a core load-bearing material, directly affects the structural safety and service life of buildings. To ensure that steel reinforcement can withstand design loads during construction and use, and to avoid engineering accidents caused by insufficient strength, rigorous strength testing of steel reinforcement is crucial. As a result, strength testing devices for building steel reinforcement have emerged. These devices are mainly used to simulate the bending, compressive, and other mechanical properties of steel reinforcement under actual stress conditions. By applying controllable external forces, key data such as deformation and fracture of the steel reinforcement are recorded to assess whether it meets relevant industry standards.
[0003] Existing steel reinforcement strength testing devices typically use a frame as the basic structure, equipped with a power source, force application mechanism, clamping device, and data acquisition system. Their technical principle is mainly based on the bending test method in mechanics of materials. By fixing the support points at both ends of the steel reinforcement, the force application mechanism applies a vertically downward force to the middle of the steel reinforcement, causing the steel reinforcement to bend. During this process, the force sensor monitors the applied pressure in real time, and the displacement sensor records the movement distance of the pressure head. The data from both are processed to generate curves, and then the yield strength, ultimate strength, and other parameters of the steel reinforcement can be calculated.
[0004] However, existing steel reinforcement strength testing devices have significant shortcomings in dealing with the impact force at the moment of steel reinforcement fracture. When the steel reinforcement reaches its ultimate strength and fractures during the bending test, the force-applying mechanism will move downwards instantly due to the loss of the steel reinforcement's support. At this time, the device lacks an effective buffering mechanism, resulting in a direct hard impact between the pressure head and the device body. This impact not only causes deformation or damage to the pressure head itself, but also transmits to the precision structures such as sensors and transmission components inside the device, causing loosening, displacement, or even damage to parts, thereby affecting the accuracy and stability of subsequent tests. In addition, frequent hard impacts will significantly shorten the overall service life of the device, leading to increased testing costs. Therefore, a strength testing device for building steel reinforcement is proposed to solve the above problems. Utility Model Content
[0005] To overcome the above deficiencies, this utility model provides a strength testing device for building steel bars, which aims to improve the problem in the prior art where the pressure block directly impacts the main body of the device after the steel bar breaks, and the hard impact will cause the pressure block to deform or the device to be damaged internally.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: A strength testing device for reinforcing steel bars in construction includes a housing, a workbench fixedly connected inside the housing, a display screen mounted on the outer wall of the housing, a vertical rod fixedly connected to the inner wall of the housing, a hydraulic pump fixedly connected to the inner wall of the housing, an outer pressure block fixedly connected to the output end of the hydraulic pump, a buffer assembly mounted at the bottom of the outer pressure block, an inner pressure block slidably connected to the outer wall of the vertical rod, an inner pressure block slidably connected to the inner wall of the outer pressure block, and a disassembly assembly mounted inside the outer pressure block. The buffer assembly includes a buffer pad, the outer wall of which is disposed at the bottom of the outer pressure block. A support column is fixedly connected to the inner wall of the box, and a sliding column is slidably connected to the inner wall of the support column. One end of the sliding column is fixedly connected to the bottom of the buffer pad, and the other end of the sliding column is fixedly connected to a limit block. A damper is fixedly connected to the inner wall of the support column, and a pad is fixedly connected to the output end of the damper. A buffer spring is sleeved on the outer wall of the damper, one end of which is fixedly connected to the inner wall of the support column, and the other end of which is fixedly connected to the bottom of the pad.
[0007] As a further description of the above technical solution: The disassembly assembly includes a locking block, the outer wall of which is disposed inside the outer pressure block.
[0008] As a further description of the above technical solution: The inner pressure block has a sliding groove inside, and the outer wall of the card block is slidably connected to the inner wall of the sliding groove.
[0009] As a further description of the above technical solution: The inner pressure block has a slot inside, and the outer wall of the block is slidably connected to the inner wall of the slot.
[0010] As a further description of the above technical solution: A guide bar is fixedly connected to the top of the inner pressure block, and the outer wall of the guide bar is slidably connected to the inner wall of the outer pressure block.
[0011] As a further description of the above technical solution: The inner wall of the outer pressure block is slidably connected to a sliding rod, and the outer wall of the sliding rod is slidably connected to the inner wall of the sliding groove.
[0012] As a further description of the above technical solution: The outer wall of the sliding rod is fixedly connected to the outer wall of the card block, and a pressing block is fixedly connected to the outer wall of the sliding rod.
[0013] As a further description of the above technical solution: The inner pressure block is equipped with a compression spring. One end of the compression spring is fixedly connected to the inner wall of the inner pressure block, and the other end of the compression spring is fixedly connected to the outer wall of the sliding rod.
[0014] In summary, this application includes at least one of the following beneficial technical effects: 1. In this utility model, the outer pressure block and the buffer pad come into contact, and then the sliding column is moved by the buffer pad. This achieves the effect of buffering the pressure block when the steel bar breaks, avoiding the pressure block directly hitting the main body of the device after the steel bar breaks. Hard impact will cause the pressure block to deform or the internal parts of the device to be damaged, thereby increasing maintenance costs. This effectively reduces the impact force when the steel bar breaks and extends the service life of the device. 2. In this utility model, the locking block moves out of the slot, and then the inner pressure block drives the guide strip to slide on the inner wall of the outer pressure block, thus achieving the effect of replacing the inner pressure block. This avoids the problem of the fixed through hole size of the traditional pressure block. If different diameter steel bars need to be tested, the entire pressure block needs to be replaced, which is not only cumbersome to operate, but also causes the steel bar to be unstable due to mismatched pressure block specifications, and may even cause the steel bar to shift or slip during testing, affecting the test accuracy. In addition, during the bending test, the steel bar will rub and squeeze against the inner wall of the through hole. After long-term use, the hole wall is prone to wear, deformation or scratches. Therefore, by replacing the through hole assembly with different hole diameters, it can quickly adapt to the testing needs of various specifications of steel bars, while reducing maintenance costs and improving the versatility of the equipment. Attached Figure Description
[0015] Figure 1 This is a three-dimensional schematic diagram of a strength testing device for building steel bars proposed in this utility model; Figure 2 This is a schematic diagram of the structure of the buffer pad of the strength testing device for building steel bars proposed in this utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the internal pressure block of a strength testing device for reinforcing steel bars proposed in this utility model; Figure 5 for Figure 4 Enlarged view of point B in the middle.
[0016] Legend: 1. Housing; 2. Workbench; 3. Monitor; 4. Upright; 5. Hydraulic pump; 6. External pressure block; 7. Internal pressure block; 8. Support column; 9. Sliding column; 10. Limiting block; 11. Buffer pad; 12. Damper; 13. Pad; 14. Buffer spring; 15. Sliding groove; 16. Slot; 17. Guide bar; 18. Sliding rod; 19. Pressing block; 20. Locking block; 21. Compression spring. Detailed Implementation
[0017] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5This application will be described in further detail below.
[0018] Reference Figures 1-3 This utility model provides an embodiment of a strength testing device for building steel bars, comprising a housing 1. The housing 1 is used to accommodate and protect all internal testing components, forming an independent testing space to ensure operational safety. Multiple testing stations are set inside the housing 1, enabling simultaneous testing of multiple steel bars and improving work efficiency. A workbench 2 is fixedly connected inside the housing 1, used to place the building steel bars to be tested, providing a stable testing reference surface to ensure the steel bars remain in a fixed position during testing. A display 3 is installed on the outer wall of the housing 1, displaying in real time the pressure value and bending value of the steel bars during bending. Key data such as bending angle and displacement are used to achieve intuitive monitoring of the testing process and results. The inner wall of the box 1 is fixedly connected to the upright 4, which is used to provide a guide rail for the up and down movement of the outer pressure block 6, preventing the outer pressure block 6 from tilting during the application of force, and achieving the effect of precise pressure application. The inner wall of the box 1 is fixedly connected to the hydraulic pump 5, which is used to drive the pressure block to apply bending force to the steel bar. The output end of the hydraulic pump 5 is fixedly connected to the outer pressure block 6. The bottom of the outer pressure block 6 is equipped with a buffer component. The inner wall of the outer pressure block 6 is slidably connected to the outer wall of the upright 4. The inner wall of the outer pressure block 6 is slidably connected to the inner pressure block 7. The disassembly component is set inside the outer pressure block 6. The buffer assembly includes a buffer pad 11. When a steel bar breaks accidentally, the buffer pad 11 first contacts the bouncing steel bar or component, providing initial cushioning and shock absorption to prevent damage from direct impact, thus achieving a preliminary cushioning effect. The outer wall of the buffer pad 11 is located at the bottom of the outer pressure block 6. A support column 8 is fixedly connected to the inner wall of the housing 1, and a sliding column 9 is slidably connected to the inner wall of the support column 8. The sliding column 9 connects the buffer pad 11 and the pad block 13. When the buffer pad 11 is subjected to impact force, the sliding column 9 slides downward along the inner wall of the support column 8, transmitting the impact force to the component below. One end of the sliding column 9 is fixedly connected to the bottom of the buffer pad 11, and the other end is fixedly connected to a limit block 10. The limit block 10 restricts the sliding distance of the sliding column 9, preventing... The sliding column 9 slides out from the support column 8 to achieve the effect of limiting protection. A damper 12 is fixedly connected to the inner wall of the support column 8. A pad 13 is fixedly connected to the output end of the damper 12. The damper 12 consumes the impact force through its own damping effect. The pad 13 fixedly connected to the output end of the damper 12 is used to evenly transmit the impact force transmitted by 9 to the damper 12 and the buffer spring 14. The buffer spring 14 is sleeved on the outer wall of the damper 12. One end of the buffer spring 14 is fixedly connected to the inner wall of the support column 8, and the other end of the buffer spring 14 is fixedly connected to the bottom of the pad 13. The damper 12 and the buffer spring 14 perform buffering movement to significantly reduce the impact force generated by the accidental breakage of the steel bar, thereby achieving the effect of effective buffering and protection of the device and the operator.
[0019] Reference Figure 4 and Figure 5 The disassembly assembly includes a locking block 20, the outer wall of which is set inside the outer pressure block 6. A sliding groove 15 is provided inside the inner pressure block 7, providing sliding space for the locking block 20 and the sliding rod 18. This prevents the locking block 20 from jamming during disassembly of the inner pressure block 7, improving the ease of disassembly. The outer wall of the locking block 20 is slidably connected to the inner wall of the sliding groove 15. A locking slot 16 is provided inside the inner pressure block 7, which cooperates with the locking block 20 to fix the inner pressure block 7, achieving the effect of disassembling the inner pressure block 7 while preventing it from shaking. The outer wall of the locking block 20 is slidably connected to the inner wall of the locking slot 16, and the locking block 20 engages with the locking slot 16 to firmly fix the inner pressure block 7 inside the outer pressure block 6, preventing it from loosening. A guide strip 17 is fixedly connected to the top of the inner pressure block 7, which slides and guides the inner wall of the outer pressure block 6, ensuring the inner pressure block... 7. Precise installation ensures accurate installation. The outer wall of the guide bar 17 is slidably connected to the inner wall of the outer pressure block 6. A sliding rod 18 is slidably connected to the inner wall of the outer pressure block 6. The sliding rod 18 is used to move the locking block 20, achieving the effect of fixing and unlocking the inner pressure block 7, improving the convenience of replacing the inner pressure block 7. The outer wall of the sliding rod 18 is slidably connected to the inner wall of the sliding groove 15. The outer wall of the sliding rod 18 is fixedly connected to the outer wall of the locking block 20. A pressing block 19 is fixedly connected to the outer wall of the sliding rod 18. The pressing block 19 is pressed by the operator to facilitate the movement of the locking block 20. A compression spring 21 is set inside the inner pressure block 7. One end of the compression spring 21 is fixedly connected to the inner wall of the inner pressure block 7, and the other end of the compression spring 21 is fixedly connected to the outer wall of the sliding rod 18. Under the influence of no external force, the compression spring 21 pushes the sliding rod 18 to drive the locking block 20 into the slot 16, achieving a quick fixing effect.
[0020] Working principle: During operation, the rebar to be tested is passed through the circular hole of the inner pressure block 7 and placed on the platform 2. Then, the hydraulic pump 5 is started, pushing the pressure block 7 downwards, causing the rebar to bend. The deformation of the rebar and the pressure data of the hydraulic pump 5 are monitored in real time via the display 3. When the pressure reaches a preset threshold, pressurization stops, and the data at this point is recorded as the basis for evaluating the rebar strength. The rebar is then removed for the next test. If the rebar unexpectedly breaks, causing the outer pressure block 6 to fall rapidly, it first contacts the buffer pad 11. When the outer pressure block 6 contacts the buffer pad 11, it... The moving buffer pad 11 continues to move downwards. The movement of the buffer pad 11 drives the sliding column 9 to slide on the inner wall of the support column 8. Then, the movement of the sliding column 9 drives the limiting block 10 to move. Subsequently, the movement of the limiting block 10 compresses the buffer spring 14. When the limiting block 10 contacts the pad 13, it squeezes the damper 12. Then, the rebound force generated by the buffer spring 14 and the damper 12 work together to achieve a buffering effect, preventing the pressure block from directly impacting the main body of the device after the steel bar breaks. A hard impact would cause the pressure block to deform or the internal parts of the device to be damaged, thereby increasing maintenance costs.
[0021] When replacing steel bars of different sizes and specifications, the worker first presses the pressing block 19. Pressing the pressing block 19 causes the sliding rod 18 to slide against the inner wall of the outer pressure block 6. Then, the sliding rod 18 compresses the compression spring 21, which in turn moves the locking block 20. When the locking block 20 moves out of the slot 16, it releases the fixation of the inner pressure block 7. Then, pulling the inner pressure block 7 removes it. When installing the inner pressure block 7, first insert the inner pressure block 7 and the guide strip 17 into the outer pressure block 6. After installation, release the pressing block 19. The spring 21 returns to its original position, causing the sliding rod 18 to reset. Then, the reset of the sliding rod 18 causes the locking block 20 to move into the slot 16, thus completing the installation of the external pressure block 6. This avoids the problem of fixed through hole size in traditional pressure blocks. If different diameter steel bars need to be tested, the entire pressure block needs to be replaced, which is not only cumbersome, but also causes the steel bars to be unstable due to mismatched specifications. In some cases, the steel bars may even shift or slip during testing, affecting the test accuracy. Furthermore, during the bending test, the steel bars will rub and squeeze against the inner wall of the through hole, and the hole wall is prone to wear, deformation or scratches after long-term use.
Claims
1. A device for detecting the strength of a building reinforcement, comprising a box (1), characterized in that: The box (1) is fixedly connected to a workbench (2), the outer wall of the box (1) is provided with a display (3), the inner wall of the box (1) is fixedly connected with a vertical rod (4), the inner wall of the box (1) is fixedly connected with a hydraulic pump (5), the output end of the hydraulic pump (5) is fixedly connected with an external pressure block (6), the bottom of the external pressure block (6) is provided with a buffer assembly, the inner wall of the external pressure block (6) is slidably connected to the outer wall of the vertical rod (4), the inner wall of the external pressure block (6) is slidably connected with an inner pressure block (7), and the disassembly assembly is provided inside the external pressure block (6). The buffer assembly includes a buffer pad (11), the outer wall of which is disposed at the bottom of the outer pressure block (6). A support column (8) is fixedly connected to the inner wall of the housing (1). A sliding column (9) is slidably connected to the inner wall of the support column (8). One end of the sliding column (9) is fixedly connected to the bottom of the buffer pad (11), and the other end of the sliding column (9) is fixedly connected to a limit block (10). A damper (12) is fixedly connected to the inner wall of the support column (8). A pad block (13) is fixedly connected to the output end of the damper (12). A buffer spring (14) is sleeved on the outer wall of the damper (12). One end of the buffer spring (14) is fixedly connected to the inner wall of the support column (8), and the other end of the buffer spring (14) is fixedly connected to the bottom of the pad block (13).
2. The device for detecting the strength of a building reinforcement according to claim 1, wherein: The disassembly assembly includes a locking block (20), the outer wall of which is disposed inside the outer pressure block (6).
3. The device for detecting the strength of a building reinforcement according to claim 2, wherein: The inner pressure block (7) has a sliding groove (15) inside, and the outer wall of the card block (20) is slidably connected to the inner wall of the sliding groove (15).
4. The device for detecting the strength of a building reinforcement according to claim 3, wherein: The inner pressure block (7) has a slot (16) inside, and the outer wall of the card block (20) is slidably connected to the inner wall of the slot (16).
5. The device for detecting the strength of a building reinforcement according to claim 4, wherein: The top of the inner pressure block (7) is fixedly connected to a guide strip (17), and the outer wall of the guide strip (17) is slidably connected to the inner wall of the outer pressure block (6).
6. The device for detecting the strength of a building reinforcement according to claim 5, wherein: The inner wall of the outer pressure block (6) is slidably connected to a sliding rod (18), and the outer wall of the sliding rod (18) is slidably connected to the inner wall of the sliding groove (15).
7. The device for detecting the strength of a building reinforcement according to claim 6, wherein: The outer wall of the sliding rod (18) is fixedly connected to the outer wall of the card block (20), and the outer wall of the sliding rod (18) is fixedly connected to the pressing block (19).
8. The device for detecting the strength of a building reinforcement according to claim 7, wherein: The inner pressure block (7) is provided with a compression spring (21). One end of the compression spring (21) is fixedly connected to the inner wall of the inner pressure block (7), and the other end of the compression spring (21) is fixedly connected to the outer wall of the sliding rod (18).