A portable steel bar tensile test apparatus

Abstract

This utility model discloses a portable steel bar tensile testing device, belonging to the technical field of material tensile testing equipment. It includes a tensile testing machine mounted on a base, with a protective device detachably connected to the base for opening and closing the machine. The protective device consists of a fixed base block, connecting frames, a rotating cylinder, a connecting rod, and an L-shaped baffle. The fixed base block is located on the base and behind the tensile testing machine. The connecting rod is mounted on the fixed base block, and the rotating cylinder is fitted onto the connecting rod. At least two connecting frames are provided to connect the rotating cylinder and the L-shaped baffle. The rotating cylinder rotates relative to the connecting rod, allowing the L-shaped baffle to cover the front and one side of the tensile testing machine. This utility model, by incorporating a protective device, can prevent the steel bar from cracking during tensile testing, thus avoiding the risk of flying debris injuring the operator and providing protection.

Description

Technical Field

[0001] This utility model belongs to the technical field of material tensile testing equipment, and provides a portable steel bar tensile testing equipment. Background Technology

[0002] In construction engineering and other fields, steel reinforcement is a crucial building material, and its quality and performance are paramount. To ensure that steel reinforcement meets engineering requirements, tensile tests are conducted to assess its strength, toughness, and other performance indicators. However, there are certain risks involved in performing tensile tests on steel reinforcement. During the tensile process, steel reinforcement may be subjected to forces exceeding its ultimate strength, resulting in a chance of it fractured. If the reinforcement fractures, it will generate high-speed flying fragments with significant kinetic energy, potentially causing serious injury to nearby workers.

[0003] Currently, while some existing rebar tensile testing equipment is equipped with protective devices, these devices are typically bulky, increasing the overall weight and size of the equipment and making it inconvenient to handle and move. Furthermore, most existing protective devices are non-removable, which is a significant drawback for portable rebar tensile testing equipment. The advantage of portable equipment lies in its flexibility for use in different locations, but non-removable protective devices limit portability and increase the difficulty of transportation and storage. Therefore, to address the problems with existing protective devices in rebar tensile testing equipment, a lightweight and detachable protective device is needed to meet the requirements of portable rebar tensile testing equipment. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a portable steel bar tensile testing device to solve the problem mentioned in the background art that when conducting tensile tests on steel bars, the steel bars may be subjected to tensile forces exceeding their ultimate strength during the tensile process, which may result in the steel bars being stretched and cracking. Once the steel bars crack, high-speed flying fragments and other flying objects will be generated, which may easily cause serious injury to the surrounding operators.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides a portable rebar tensile testing device, including a tensile testing machine mounted on a base. A protective device for opening and closing the tensile testing machine is detachably connected to the base. The protective device consists of a fixed base block, a connecting frame, a rotating cylinder, a connecting rod, and an L-shaped baffle. The fixed base block is located on the base and behind the tensile testing machine. The connecting rod is mounted on the fixed base block. The rotating cylinder is fitted onto the connecting rod. At least two connecting frames are provided to connect the rotating cylinder and the L-shaped baffle. The rotating cylinder rotates relative to the connecting rod, allowing the L-shaped baffle to cover the front and one side of the tensile testing machine. This protective device design not only enhances the safety of the portable rebar tensile testing device but also ensures the device's portability and ease of operation, providing a safer and more efficient testing environment for field engineers.

[0007] Optionally, the horizontal panel of the L-shaped baffle is configured to consist of a protective frame and a transparent protective panel, with the transparent protective panel located inside the protective frame. The transparent protective panel is made of tempered glass or acrylic. This design, due to the transparent protective panel, allows operators to observe the tensile test process while maintaining a safe distance, effectively preventing splashes from penetrating and reducing the risk of injury to operators, thus improving safety.

[0008] Optionally, the L-shaped baffle is equipped with an operating handle, which allows operators to quickly and easily operate the protective device. Through the operating handle, operators can quickly and effectively control the status of the protective device while maintaining a safe distance, reducing the risk caused by improper operation during the tensile test.

[0009] Optionally, the protective device also includes a magnetic block set on the L-shaped baffle and a fixed magnetic sheet set on the tensile testing machine and magnetically attracted to the magnetic block. The magnetic attraction method provides a strong fixing force to ensure that the protective device remains stable during the tensile test and will not be displaced due to operation or external interference.

[0010] Optionally, the tensile testing machine consists of a fixed base plate, a lower clamping seat, an upper clamping seat, a lifting fixed block, a lifting drive block, a lifting screw, a column, an upper force sensor, and a lower force sensor. The lower force sensor is mounted on the base via the fixed base plate, and a lower clamping seat is mounted on the lower force sensor. The column is mounted on the base and located between the fixed base plate and the fixed base block. The column has a lifting groove for mounting the lifting drive block and the lifting screw. The lifting drive block and the lifting screw are threaded together, and the lifting drive block and the lifting groove are slidably engaged. A power motor for driving the lifting screw to rotate is installed inside the base or on the top of the column. A lifting fixed block is mounted on the lifting drive block, an upper force sensor is mounted on the lifting fixed block, and an upper clamping seat is mounted on the upper force sensor. The upper clamping seat and the lower clamping seat are arranged vertically in correspondence.

[0011] Optionally, the base also houses a main unit with a data display screen, which is electrically connected to the upper force sensor, lower force sensor, and drive motor. This main unit with a data display screen not only enhances the intelligence of the portable rebar tensile testing equipment but also significantly improves operational convenience and safety. By displaying the rebar stress in real time, operators can better monitor the testing process and make timely adjustments, thereby ensuring the accuracy and reliability of the test.

[0012] The beneficial effects of this utility model are: the portable steel bar tensile testing equipment of this utility model improves the safety, convenience, and operational flexibility of the test through a series of designs. The following are the main features and advantages of this equipment.

[0013] 1. Removable Protective Device. A removable protective device has been added to the rear of the equipment, providing more flexible usage options. Operators can quickly install or remove it as needed. Simultaneously, the protective device can be rotated clockwise or counterclockwise via a rotating cylinder outside the connecting rod, facilitating easy operation and making the opening and closing of the protective device simple and intuitive.

[0014] 2. Protective Configuration Design. When the detachable protective device is rotated to the protective position, the front protective frame is positioned directly in front of the rebar tensile testing area, effectively preventing injury to operators from flying debris generated by rebar fracture. This design significantly enhances the safety of the test. Furthermore, the front protective frame is equipped with a transparent protective panel, ensuring that operators can observe the rebar tensile process in real time while providing protection. This visualization design allows operators to better monitor the test progress and the condition of the rebar.

[0015] 3. Portability and Disassembly. When protective devices are not required, operators can easily rotate the device to one side. This design significantly improves the device's portability, making it more suitable for rapid testing in different environments. Simultaneously, the device's detachable structure facilitates transportation and storage, making it suitable for work environments requiring frequent relocation.

[0016] 4. Stability and Safety. The magnetic block on the outer wall of the top left end of the L-shaped baffle and the fixed magnetic plate on the outer wall of the right end of the column attract each other, ensuring the stability of the protective device in the protected state. This magnetic adsorption mechanism effectively prevents the protective device from shifting due to accidental collisions, further enhancing the safety of the equipment. At the same time, the stable protective structure allows operators to focus on data recording and analysis with greater peace of mind during experiments.

[0017] In summary, this portable rebar tensile testing device provides a high level of safety and ease of operation through design elements such as a detachable protective device, a transparent protective plate, optimized space design, and a magnetic adsorption mechanism. It also provides engineers with a more efficient and reliable testing tool. Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0019] Figure 1 This is a three-dimensional structural diagram of the portable rebar tensile testing equipment of this utility model in the state of the protective device being closed;

[0020] Figure 2 for Figure 1 A schematic diagram of the left-side structure;

[0021] Figure 3 for Figure 1 A schematic diagram of the front structure;

[0022] Figure 4 This is a three-dimensional structural diagram of the portable steel bar tensile testing equipment of this utility model in the protective device open state;

[0023] Figure 5 for Figure 1 A left-side three-dimensional structural diagram of the protective device in the middle;

[0024] Figure 6 for Figure 1 A three-dimensional structural diagram of the protective device in the middle (right view).

[0025] Reference numerals: 1-Base; 2-Main unit of equipment; 3-Fixed base plate; 4-Lower clamping seat; 5-Upper clamping seat; 6-Lifting fixing block; 7-Lifting driving block; 8-Lifting groove; 9-Lifting screw; 10-Column; 11-Upper force sensor; 12-Tensile testing machine; 13-Protective device; 14-Lower force sensor; 15-Fixed base block; 16-Connecting frame; 17-Rotating cylinder; 18-Connecting rod; 19-L-shaped baffle; 20-Magnetic block; 21-Fixed magnetic sheet; 22-Protective frame; 23-Transparent protective plate; 24-Operating handle. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0027] like Figure 1-6As shown, this utility model discloses a portable rebar tensile testing device, including a tensile testing machine 12 mounted on a base 1. The base 1 serves as the foundation of the device, providing stable support and ensuring that the entire device does not shift during the test. The tensile testing machine 12 is responsible for applying tensile force and measuring the performance of the rebar. It mainly consists of a fixed base plate 3, a lower clamping seat 4, an upper clamping seat 5, a lifting fixed block 6, a lifting drive block 7, a lifting screw 9, a column 10, an upper force sensor 11, and a lower force sensor 14. The lower force sensor 14 is mounted on the base 1 via the fixed base plate 3, and the lower clamping seat 4 is mounted on the lower force sensor 14, meaning the fixed base plate 3 provides support for the lower clamping seat 4 and the lower force sensor 14. The column 10 is mounted on the base 1 and located behind the fixed base plate 3. The column 10 has a lifting groove 8 for mounting the lifting drive block 7 and the lifting screw 9. The lifting drive block 7 is threadedly engaged with the lifting screw 9, and the lifting drive block 7 is slidably engaged with the lifting groove 8. The lifting screw 9 rotates clockwise and counterclockwise. The rotation can drive the lifting block 7 to move up and down relative to the lifting groove 8 or the column 10; a power motor (not shown) for driving the lifting screw 9 to rotate is set inside the base 1 or on the top of the column 10; a lifting fixing block 6 is set on the lifting block 7, that is, the movement of the lifting block 7 can precisely control the position of the upper clamping seat 5 to realize the stretching operation of the steel bar, thereby stretching the steel bar; an upper force sensor 11 is set on the lifting fixing block 6, and an upper clamping seat 5 is set on the upper force sensor 11, and the upper clamping seat 5 and the lower clamping seat 4 are arranged vertically and vertically respectively. The upper clamping seat 5 and the lower clamping seat 4 are both equipped with fixing clamps inside their left and right ends. After tightening the fixing clamps, the two ends of the steel bar can be clamped and fixed inside them respectively. In the steel bar tensile test, the tightening of the fixing clamps ensures that the steel bar will not slip or loosen during the stretching process, ensuring the smooth progress of the test. Only when the steel bar is firmly fixed in the clamping seat can the force sensor accurately measure the force on the steel bar, thereby obtaining reliable test results. The lower force sensor 14 and the upper force sensor 11 can monitor the force on the steel bar in real time during the tensile process. The force sensors can accurately measure the stress on the steel bar during the tensile process, providing key data for evaluating the performance and quality of the steel bar. By installing the lower force sensor 14 and the upper force sensor 11 at the upper and lower ends of the lower clamping seat 4 and the upper clamping seat 5 respectively, the stress state at both ends of the steel bar during the tensile process can be fully grasped, ensuring the accuracy and reliability of the test results.

[0028] To prevent spatter from flying debris generated during the tensile testing process from harming operators, this equipment is equipped with a lightweight, detachable protective device 13 to ensure safety. Specifically, a protective device 13 for opening and closing the tensile testing machine 12 is detachably connected to the base 1. The protective device 13 consists of a fixed base block 15, a connecting frame 16, a rotating cylinder 17, a connecting rod 18, and an L-shaped baffle 19. The fixed base block 15 is located on the base 1 and behind the column 10 of the tensile testing machine 12, providing a stable support foundation. The connecting rod 18 is mounted on the fixed base block 15, and the rotating cylinder 17 is fitted onto the connecting rod 18, serving as a support structure for connecting the rotating cylinder 17 and facilitating disassembly and assembly. That is, lifting the rotating cylinder 17 upwards allows it to be detached from the connecting rod 18, or lowering the rotating cylinder 17 allows it to be disassembled. Mounted on the connecting rod 18, at least two connecting brackets 16 are provided to connect the rotating cylinder 17 and the L-shaped baffle 19, ensuring a stable connection between them. The rotation of the rotating cylinder 17 relative to the connecting rod 18 allows the L-shaped baffle 19 to cover the front and one side of the tensile testing machine 12. Thus, the transverse surface of the L-shaped baffle 19 can cover the front of the tensile testing machine 12, while the longitudinal surface can cover one side of the tensile testing machine 12 adjacent to its front, i.e., the front and the adjacent right side, reducing the risk of accidental injury from flying debris and achieving a protective shielding effect. Using this scheme, when performing a rebar tensile test, the operator can quickly install or remove the protective device 13 as needed. Through the rotation of the rotating cylinder 17, the L-shaped baffle 19 can effectively shield the front and one adjacent side of the tensile testing machine 12, thereby preventing injury to the operator from flying debris caused by rebar breakage. Meanwhile, since the protective device 13 is designed to be detachable, operators can easily remove the protective device when it is not needed, reducing the overall weight of the equipment, facilitating transportation and storage, and ensuring the portability of the equipment.

[0029] In this embodiment, the transverse panel of the L-shaped baffle 19 is configured to consist of a protective frame 22 and a transparent protective plate 23. The protective frame 22 serves as the basic framework of the transverse panel of the L-shaped baffle 19, providing structural support and ensuring that the transparent protective plate 23 is securely fixed inside. The material of the protective frame can be lightweight yet sturdy metal or plastic to maintain overall lightness. The transparent protective plate 23 is made of tempered glass or acrylic, possessing high impact resistance and transparency. This material not only effectively resists the impact of splashes but also ensures that operators can clearly observe the test situation during the experiment. The design of the transparent protective plate 23 allows for real-time monitoring during the test, helping operators to judge the test progress and the condition of the reinforcing steel. Of course, in different examples, the size of the transparent protective plate 23 can be adjusted according to needs. For example, the transparent protective plate can be reduced to a window-like size to still provide necessary protection without obstructing the view.

[0030] In this embodiment, an operating handle 24 is provided on the L-shaped baffle 19. The operating handle 24, fixed to the outer wall of the left end of the protective frame 22, allows the operator to easily rotate and adjust the position of the L-shaped baffle 19. Whether installing, disassembling, or adjusting the angle of the protective device 13, the operating handle 24 provides greater leverage, reducing the effort and complexity of the operation.

[0031] In this embodiment, the protective device 13 further includes a magnetic block 20 disposed on the L-shaped baffle 19 and a fixed magnetic sheet 21 disposed on the outer wall of the right end of the column 10 of the tensile testing machine 12 and magnetically attracted to the magnetic block 20. That is, when the left end of the magnetic block 20 is attracted and attached to the right end of the fixed magnetic sheet 21, the protective frame 22 and the transparent protective plate 23 are parallel to the front outer wall of the column 10 of the tensile testing machine 12, and the rotating cylinder 17 can rotate clockwise / counterclockwise outside the connecting rod 18. This magnetic attraction method allows the protective device 13 to be firmly fixed in the required position during use, preventing the protective device 13 from shifting due to accidental collisions or other situations. When the protective device 13 is not needed, it can be easily rotated to one side by overcoming the magnetic force, without occupying too much space, thus improving the portability and flexibility of the equipment.

[0032] In this embodiment, a device host 2 with a data display screen is also installed inside the base 1. The device host 2 is electrically connected to the upper force sensor 11, the lower force sensor 14, and the power motor. The data display screen can intuitively show the stress situation of the steel bar during the tensile process, which is convenient for operators to observe and record test data. By displaying the changes in force in real time, operators can understand the progress of the test in a timely manner and judge whether the performance and quality of the steel bar meet the requirements.

[0033] This portable rebar tensile testing equipment performs tensile tests on rebars primarily through the following steps: First, the two ends of the rebar to be tested are placed inside the lower clamping seat 4 and the upper clamping seat 5, respectively. The fixing clamps on these seats are tightened to ensure the rebar is securely fixed between the two clamping seats. Next, the lower force sensor 14 and the upper force sensor 11 are installed at the upper and lower ends of the lower clamping seat 4 and the upper clamping seat 5, respectively, to monitor the force on the rebar during the tensile process in real time. After the equipment is started, the power motor located inside the top of the column 10 begins to work. The motor shaft of the power motor is fixedly connected to the top of the lifting screw 9, which is vertically installed inside the lifting groove 8. The rotation of the motor shaft drives the lifting screw 9 to rotate. The lifting drive block 7 has a lifting screw hole that matches the lifting screw 9. When the lifting screw 9 rotates clockwise or counterclockwise, through the threaded transmission principle, the lifting screw hole drives the lifting drive block 7 to move up and down within the lifting groove 8. The lifting and fixing block 6 is fixed to the front end of the lifting and driving block 7, and the top of the upper clamping seat 5 is connected to the upper force sensor 11 and the lifting and fixing block 6. Therefore, the up and down movement of the lifting and driving block 7 will drive the upper clamping seat 5 to move up and down. As the upper clamping seat 5 rises or falls, the steel bar is gradually stretched. During the stretching process, the lower force sensor 14 and the upper force sensor 11 transmit the force data of the steel bar to the host device 2 in real time. After processing the data, the host device 2 displays it on the data display screen inside the front outer wall for the operator to observe and record. The transparent protective film pasted on the front outer wall of the data display screen can protect the display screen and prevent it from being scratched or damaged during use. In this way, this portable steel bar tensile testing equipment can accurately perform tensile tests on steel bars and display the force changes during the stretching process in real time, providing a reliable basis for the quality inspection and performance evaluation of steel bars.

[0034] The protective device 13 of this portable rebar tensile testing equipment mainly achieves safety protection for operators and flexible use through the following methods: First, the fixed base block 15 is welded to the outer wall of the rear end of the column 10 and / or the base 1, providing a stable support foundation for the entire protective device 13. The connecting rod 18 is welded to the top of the fixed base block 15, and its function is to act as a rotation axis, so that the rotating cylinder 17 sleeved on the outside can rotate smoothly clockwise / counterclockwise. The connecting frame 16 welded on the upper and lower sides of the center of the outer wall of the right end of the rotating cylinder 17 is connected to the L-shaped baffle 19. In this way, when the rotating cylinder 17 rotates, it can drive the L-shaped baffle 19 to move. The longitudinal plate can completely cover the outside of the right side of the tensile testing machine 12, providing lateral protection to prevent splashes that may occur during the rebar tensile test from flying out from the side and injuring the operator. At the same time, the protective frame 22 of the transverse plate of the L-shaped baffle 19 can completely protect the front of the lower clamping seat 4 and the upper clamping seat 5, further enhancing the protective effect and ensuring that the operator will not be injured by splashes from the front during the rebar tensile test. The transparent protective plate 23 fixed inside the protective frame 22 can effectively block splashes and allow the operator to clearly observe the rebar tensile test process through the plate, facilitating real-time monitoring of the test.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A portable steel bar tensile testing device, comprising a tensile testing machine (12) mounted on a base (1), characterized in that, A protective device (13) for opening and closing the tensile testing machine (12) is detachably connected to the base (1). The protective device (13) consists of a fixed base block (15), a connecting frame (16), a rotating cylinder (17), a connecting rod (18), and an L-shaped baffle (19). The fixed base block (15) is located on the base (1) and behind the tensile testing machine (12). The connecting rod (18) is located on the fixed base block (15). The rotating cylinder (17) is fitted onto the connecting rod (18). There are at least two connecting frames (16) for connecting the rotating cylinder (17) and the L-shaped baffle (19). The rotating cylinder (17) rotates relative to the connecting rod (18) so that the L-shaped baffle (19) can cover the front and one side of the tensile testing machine (12).

2. The portable steel bar tensile testing device according to claim 1, characterized in that, The horizontal panel of the L-shaped baffle (19) is composed of a protective frame (22) and a transparent protective plate (23). The transparent protective plate (23) is located inside the protective frame (22) and is made of tempered glass or acrylic material.

3. The portable steel bar tensile testing device according to claim 1, characterized in that, An operating handle (24) is provided on the L-shaped baffle (19).

4. The portable steel bar tensile testing device according to claim 1, characterized in that, The protective device (13) also includes a magnetic block (20) disposed on the L-shaped baffle (19) and a fixed magnetic sheet (21) disposed on the tensile testing machine (12) and magnetically attracted to the magnetic block (20).

5. The portable steel bar tensile testing device according to any one of claims 1-4, characterized in that, The tensile testing machine (12) consists of a fixed base plate (3), a lower clamping seat (4), an upper clamping seat (5), a lifting fixing block (6), a lifting driving block (7), a lifting screw (9), a column (10), an upper force sensor (11), and a lower force sensor (14). The lower force sensor (14) is mounted on the base (1) via the fixed base plate (3), and the lower clamping seat (4) is mounted on the lower force sensor (14). The column (10) is mounted on the base (1) and located between the fixed base plate (3) and the fixed base block (15), and the column (10) is equipped with a mounting bracket for installation. The lifting drive block (7) and the lifting screw (9) have lifting grooves (8). The lifting drive block (7) is threadedly engaged with the lifting screw (9), and the lifting drive block (7) is slidably engaged with the lifting groove (8). A power motor for driving the lifting screw (9) to rotate is provided in the base (1) or on the top of the column (10). The lifting drive block (7) is provided with a lifting fixing block (6), the lifting fixing block (6) is provided with an upper force sensor (11), the upper force sensor (11) is provided with an upper clamping seat (5), and the upper clamping seat (5) and the lower clamping seat (4) are arranged vertically in correspondence.

6. The portable steel bar tensile testing device according to claim 5, characterized in that, The base (1) is also equipped with a device host (2) with a data display screen. The device host (2) is electrically connected to the upper force sensor (11), the lower force sensor (14), and the power motor respectively.

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