Reinforcing steel bar tensile strength detection device
By introducing an airbag and spring buffer structure into the steel bar tensile strength testing device, the clamp design prevents fragments from flying, and combined with a transparent protective door for observation, the impact problem when the steel bar breaks is solved, improving the durability of the equipment and the safety of the test.
Patent Information
- Application Number
- CN202520504872.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-21
AI Technical Summary
Existing steel bar tensile strength testing devices suffer from equipment damage and decreased accuracy due to energy release at the moment of steel bar fracture.
It uses an airbag and spring structure to buffer the impact force, the gripper design prevents fragments from flying, the transparent protective door makes it easy to observe, and the hydraulic system controls the movement of the gripper.
It reduces wear and tear on equipment components, improves equipment durability and testing safety, and enables a fast and convenient testing process.
Smart Images
Figure CN223940688U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steel bar testing technology, specifically a steel bar tensile strength testing device. Background Technology
[0002] The tensile strength of reinforcing bars is typically tested using a tensile test method. This involves clamping both ends of the reinforcing bar and applying tension until it breaks, thus measuring its ultimate tensile strength. Currently, most common reinforcing bar tensile strength testing equipment uses a hydraulic system to apply the tension. During the test, the reinforcing bar stores elastic energy under tension. At the moment of fracture, when it reaches its ultimate strength, the released energy causes a sudden change in the material's internal stress, resulting in severe vibration and impact on the clamping and lifting components, leading to equipment damage or decreased accuracy. Therefore, there is an urgent need for a new reinforcing bar tensile strength testing device that overcomes these technical shortcomings. Utility Model Content
[0003] The purpose of this invention is to provide a device for testing the tensile strength of reinforcing bars, so as to solve the problem of the huge impact on the test components at the moment of fracture mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a steel bar tensile strength testing device, comprising a testing chamber and a base, wherein the testing chamber is fixedly connected to the top of the base, a fixed seat is provided at the bottom of the testing chamber, columns are vertically fixed at the four corners of the top of the fixed seat, lifting seats are movably sleeved on the outside of the columns, an upper clamp is horizontally fixed between the lifting seats, a lower clamp is fixedly connected to the top of the fixed seat, an airbag is sleeved on the outside of the columns, the top of the airbag abuts against the lifting seats, a sleeve is fixedly sleeved inside the lifting seats, and multiple sets of slots are arranged around the inner wall of the sleeve, each set of slots is equipped with a spring, and a spring piece is welded to the end of the spring.
[0005] As a further technical solution of this utility model, the spring is an annular concave piece that surrounds and adheres to the outer wall of the column to form a circular structure.
[0006] As a further technical solution of this utility model, hydraulic cylinders are fixed at the four corners of the top of the testing chamber, and the movable ends of the hydraulic cylinders are fixedly connected downward to the lifting seats respectively.
[0007] As a further technical solution of this utility model, both the lower clamp and the upper clamp include a set of mounting plates, and cylinders are fixedly connected to both sides of the surface of the mounting plates, and clamping blocks are fixedly connected to the movable end of the cylinders.
[0008] As a further technical solution of this utility model, a slider is welded to the bottom end of the clamping block, and a groove is opened on the surface of the mounting plate, and the slider is embedded in the groove and moves.
[0009] As a further technical solution of this utility model, each clamping side of the clamping block is fixedly connected with a fastening sleeve, and both sides of the surface of the mounting plate are covered with protective seats, with the inner side of the protective seats open for the clamping block to move.
[0010] As a further technical solution of this utility model, the lower clamp and the upper clamp have the same structure but opposite directions.
[0011] As a further technical solution of this utility model, an openable transparent protective door is installed at the front end of the testing chamber.
[0012] Compared with the prior art, the beneficial effects of this utility model are: the steel bar tensile strength testing device not only reduces the wear and tear on the components during testing and avoids damage to the clamping components, but also makes it easy to observe, safe and fast;
[0013] (1) By setting up an airbag, sleeve, spring, slot and spring, the device pulls the upper clamp to rise through the hydraulic cylinder, which drives the clamped steel bar to stretch and test the tensile strength. In order to protect the test components, an airbag is sleeved on the outside of the column. When the steel bar breaks, the instantaneous impact force will cause the moving lifting seat to be impacted. At this time, the airbag extends with the lifting seat and can relieve the impact. At the same time, in the sleeve, multiple sets of springs drive the spring to have a certain amount of room to move, which prevents the lifting seat from hitting the column, reduces the wear of the components during the test, and thus improves the durability of the equipment.
[0014] (2) By setting up a cylinder, clamping block and protective seat, when clamping the steel bar, the cylinder drives the clamping block to move relative to clamp the steel bar. When loosening, the cylinder pulls back the clamping block. The movable clamping block is covered in the protective seat. When the steel bar breaks, the fragments will not fly and hit the lower clamp, thus avoiding damage to the clamping components.
[0015] (3) By setting up a hydraulic cylinder, a testing chamber, a lower clamp and an upper clamp, the upper clamp is pulled up by four sets of hydraulic cylinders, while the lower clamp is fixed at the bottom, so that one end of the steel bar is pulled up and the other end remains stationary. During the test, the experimental process can be observed through the transparent protective door at the front of the testing chamber, which is safe and fast. Attached Figure Description
[0016] Figure 1 This is a frontal cross-sectional view of the present invention.
[0017] Figure 2 This is a top view schematic diagram of the sleeve structure of this utility model;
[0018] Figure 3 This is a front view schematic diagram of the clamping block structure of this utility model;
[0019] Figure 4This is a front view schematic diagram of the airbag structure of this utility model.
[0020] In the diagram: 1. Testing chamber; 2. Hydraulic cylinder; 3. Column; 4. Lifting seat; 5. Airbag; 6. Upper clamp; 7. Lower clamp; 8. Fixed seat; 9. Base; 10. Sleeve; 11. Spring; 12. Slot; 13. Spring piece; 14. Protective seat; 15. Cylinder; 16. Clamping block; 17. Fastening sleeve; 18. Slider; 19. Slide groove; 20. Mounting plate. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Please see Figure 1-4 An embodiment of this utility model provides a steel bar tensile strength testing device, including a testing chamber 1 and a base 9. The testing chamber 1 is fixedly connected to the top of the base 9. A fixed seat 8 is provided at the bottom of the testing chamber 1. Columns 3 are vertically fixed at the four corners of the top of the fixed seat 8. Lifting seats 4 are movably sleeved on the outside of the columns 3. An upper clamp 6 is horizontally fixed between the lifting seats 4. A lower clamp 7 is fixedly connected to the top of the fixed seat 8. An airbag 5 is sleeved on the outside of the columns 3. The top of the airbag 5 abuts against the lifting seat 4. A sleeve 10 is fixedly sleeved inside the lifting seat 4. Multiple sets of slots 12 are arranged around the inner wall of the sleeve 10. A spring 11 is installed in each set of slots 12. A spring piece 13 is welded to the end of the spring 11. The spring piece 13 is an annular concave piece that surrounds and fits against the outer wall of the column 3 to form a circular structure.
[0023] Specifically, such as Figure 1 , Figure 2 and Figure 4 As shown, the device uses hydraulic cylinder 2 to pull the upper clamp 6 upward, causing the clamped steel bar to stretch and test the tensile strength. As a protective testing component, an airbag 5 is sleeved on the outside of the column 3. When the steel bar breaks, the instantaneous impact will cause the moving lifting seat 4 to be impacted. At this time, the airbag 5 extends as the lifting seat 4 rises, which can mitigate the impact. At the same time, inside the sleeve 10, multiple sets of springs 11 drive the spring sheet 13 to have a certain amount of room to move, preventing the lifting seat 4 from hitting the column 3.
[0024] Hydraulic cylinders 2 are fixed at the four corners of the top of the testing chamber 1. The movable ends of the hydraulic cylinders 2 are fixedly connected to the lifting seat 4 respectively. The lower clamp 7 and the upper clamp 6 each include a set of mounting plates 20. Cylinders 15 are fixedly connected to both sides of the surface of the mounting plate 20. Clamping blocks 16 are fixedly connected to the movable ends of the cylinders 15. A slider 18 is welded to the bottom of the clamping block 16. A sliding groove 19 is opened on the surface of the mounting plate 20. The slider 18 is embedded in the sliding groove 19 and moves. Fastening sleeves 17 are fixedly connected to the clamping sides of the clamping block 16. Protective seats 14 are covered on both sides of the surface of the mounting plate 20. The inner side of the protective seat 14 is open to allow the clamping block 16 to move.
[0025] Specifically, such as Figure 1 and Figure 3 As shown, when clamping the reinforcing bar, the cylinder 15 drives the clamping block 16 to move relative to clamp the reinforcing bar. When loosening, the cylinder 15 pulls back the clamping block 16. The movable cover of the clamping block 16 is inside the protective seat 14, so that when the reinforcing bar breaks, the fragments will not fly and hit the lower clamp 7.
[0026] The lower clamp 7 and the upper clamp 6 have the same structure but opposite directions. The front end of the testing chamber 1 is equipped with an openable transparent protective door.
[0027] Specifically, such as Figure 1 As shown, the upper clamp 6 is raised by four sets of hydraulic cylinders 2, while the lower clamp 7 is fixed at the bottom, so that one end of the steel bar is pulled up and the other end remains stationary. During the test, the experimental process can be observed through the transparent protective door at the front of the test chamber 1.
[0028] Working principle: When using this utility model, firstly, open the protective door, fix the bottom of the steel bar in the two sets of fastening sleeves 17, start the hydraulic cylinder 2, clamp the top of the steel bar in the upper clamp 6, so that one end of the steel bar is pulled up and the other end is stationary. During the test, the experimental process can be observed through the transparent protective door at the front of the test chamber 1. When the test begins, the hydraulic cylinder 2 drives the upper clamp 6 to rise. As a protective testing component, an airbag 5 is sleeved on the outside of the column 3. When the steel bar breaks, the instantaneous impact will cause the moving lifting seat 4 to be impacted. At this time, the airbag 5 extends as the lifting seat 4 rises, which can mitigate the impact. At the same time, in the sleeve 10, multiple sets of springs 11 drive the spring piece 13 to have a certain amount of room for movement, preventing the lifting seat 4 from hitting the column 3. The movable cover of the clamping block 16 is inside the protective seat 14, so that when the steel bar breaks, the fragments will not fly and hit the lower clamp 7.
[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A device for testing the tensile strength of reinforcing bars, comprising a testing chamber (1) and a base (9), characterized in that: The base (9) is fixedly connected to the top of the detection chamber (1). The bottom of the detection chamber (1) is provided with a fixed seat (8). The four corners of the top of the fixed seat (8) are vertically fixed with columns (3). The columns (3) are movably sleeved with lifting seats (4). The lifting seats (4) are horizontally fixed with an upper clamp (6). The top of the fixed seat (8) is fixedly connected with a lower clamp (7). The columns (3) are sleeved with an airbag (5). The top of the airbag (5) abuts against the lifting seat (4). The lifting seat (4) is fixedly sleeved with a sleeve (10). The inner wall of the sleeve (10) is surrounded by multiple sets of slots (12). Each set of slots (12) is equipped with a spring (11). The end of the spring (11) is welded with a spring piece (13).
2. The steel bar tensile strength testing device according to claim 1, characterized in that: The spring piece (13) is an annular concave piece that surrounds and adheres to the outer wall of the column (3) to form a circular structure.
3. The steel bar tensile strength testing device according to claim 1, characterized in that: Hydraulic cylinders (2) are fixed at the four corners of the top of the testing chamber (1), and the movable ends of the hydraulic cylinders (2) are fixedly connected to the lifting seat (4) respectively.
4. The steel bar tensile strength testing device according to claim 1, characterized in that: Both the lower clamp (7) and the upper clamp (6) include a set of mounting plates (20). Cylinders (15) are fixedly connected to both sides of the surface of the mounting plate (20), and clamping blocks (16) are fixedly connected to the movable end of the cylinder (15).
5. The steel bar tensile strength testing device according to claim 4, characterized in that: The bottom end of the clamping block (16) is welded with a slider (18), and the surface of the mounting plate (20) is provided with a groove (19). The slider (18) is embedded in the groove (19) and moves.
6. The steel bar tensile strength testing device according to claim 4, characterized in that: The clamping side of each clamping block (16) is fixedly connected with a fastening sleeve (17), and both sides of the surface of the mounting plate (20) are covered with protective seats (14), with the inner side of the protective seats (14) open for the clamping block (16) to move.
7. The steel bar tensile strength testing device according to claim 1, characterized in that: The lower clamp (7) and the upper clamp (6) have the same structure but opposite directions.
8. The steel bar tensile strength testing device according to claim 1, characterized in that: The front end of the testing chamber (1) is equipped with an openable transparent protective door.