Counter-force stretching device for lap welding deformed steel bar
By designing a reaction tensioning device for lap welded rebar, the problem of lap welded rebar that may damage the test machine when tensile test on a hydraulic universal testing machine in the prior art is solved, and safe and accurate test completion is achieved, and equipment collision is avoided through the buffer mechanism.
Patent Information
- Application Number
- CN202422150875.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-03
AI Technical Summary
In the prior art, when overlap welding rebar is performed on a hydraulic universal testing machine, because the force center is different from the center of the test machine, the test machine with long columns and low stiffness may not be able to complete the test, and may even damage the test machine.
A reaction tensioning device for lap welded rebar is designed, including hydraulic testing machine equipment, reaction tensioning device and safety mechanism. The reaction tension device detects the tensile force of overlap welding rebar through the force-applied frame and the stress-applied frame, and buffers the equipment after breaking through the safety mechanism to avoid rapid collision.
The tensile test of overlap welding rebar is achieved without damaging the test machine, which improves the safety and accuracy of the test, and avoids rapid collision of the equipment through the buffer mechanism.
Smart Images
Figure CN223005896U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ribbed steel bar stretching equipment, in particular to a reaction force stretching device for lapped welded ribbed steel bars. Background Technique
[0002] The hydraulic universal testing machine is mainly used for mechanical property tests of metals, non-metals, composite materials and products in ways such as tension, compression, bending, and shearing. At the same time, tests and data processing can be carried out according to various standards such as GB, ISO, JIS, ASTM, DIN and those provided by users.
[0003] The common ribbed steel bars used in construction sites in the prior art can be used as the lapped ribbed steel bars for testing by the reaction force stretching machine. However, when such lapped welded ribbed steel bars are subjected to a tensile test on a hydraulic universal testing machine, because the stress center is not coaxial with the center of the testing machine, it may be impossible to complete the test for some testing machines with longer columns and lower stiffness, and even damage the testing machine. Content of the Utility Model
[0004] The purpose of the utility model is to provide a reaction force stretching device for lapped welded ribbed steel bars to solve the problems put forward in the above background technique.
[0005] To achieve the above purpose, the utility model provides the following technical scheme: A reaction force stretching device for lapped welded ribbed steel bars, including a hydraulic testing machine device for accommodating and detecting the reaction force stretching device and the lapped welded ribbed steel bars; a reaction force stretching device including a force application frame and a force receiving frame for cooperating to detect the tensile force of the lapped welded ribbed steel bars; and a safety mechanism provided inside the reaction force stretching device for buffering the force application frame and the force receiving frame after the lapped welded ribbed steel bars are detected to break.
[0006] As a further scheme of the utility model: A reaction force stretching device for lapped welded ribbed steel bars, the hydraulic testing machine device includes an oil cylinder piston, a workbench, columns and a middle cross beam. The output end of the oil cylinder piston is fixedly connected to the workbench. One end of the column is movably connected to the workbench and the other end is movably connected to the middle cross beam. One side of the reaction force stretching device is movably connected to the workbench and the other side is movably connected to the middle cross beam.
[0007] As a further solution of the utility model: a lap-welded threaded steel reaction force stretching device, the force-applying frame includes a base plate, a support and an upper pressure plate, the force-bearing frame includes a pressure rod, a top plate and a lower pressure plate, one end of the support is fixedly connected to the base plate, and the other end is fixedly connected to the upper pressure plate, one end of the pressure rod is fixedly connected to the top plate, and the other end is fixedly connected to the lower pressure plate, the pressure rod is movably connected to the upper pressure plate through an oil-free bearing, the upper pressure plate and the lower pressure plate are both clamped with lap-welded threaded steel bars, and the two groups of lap-welded threaded steel bars are movably connected.
[0008] As a further solution of the utility model: a lap-welded threaded steel reaction force stretching device, the safety mechanism includes a buffer spring and a spring guide rod, one end of the buffer spring is fixedly connected to the base plate, and the other end is movably connected to the lower pressure plate, the spring guide rod is accommodated inside the buffer spring and one end is fixedly connected to the base plate, and the other end of the spring guide rod is movably connected to the lower pressure plate.
[0009] As a further solution of the utility model: a lap-welded threaded steel reaction force stretching device also includes a threaded steel nut and a gasket, the upper pressure plate is clamped and connected to the lap-welded threaded steel through the threaded steel nut and the gasket, and the lower pressure plate is clamped and connected to the lap-welded threaded steel through the threaded steel nut and the gasket.
[0010] As a further solution of the utility model: a lap-welded threaded steel reaction force stretching device also includes a jack, the jack is fixedly installed on one side of the base plate, and the output end of the jack is movably connected to the lower pressure plate.
[0011] As a further solution of the utility model: a lap-welded threaded steel reaction force stretching device also includes a positioning pin, and the positioning pin is adapted to the cylinder piston.
[0012] Compared with the prior art, the beneficial effects of the utility model are:
[0013] 1. Since the pressure rod is movably connected to the upper pressure plate through an oil-free bearing, the oil-free bearing can reduce the friction of the pressure rod during its movement and improve the accuracy of the test data.
[0014] 2. Since the force-applying frame includes a bottom plate, a support and an upper pressure plate, and the load-bearing frame includes a pressure rod, a top plate and a lower pressure plate, during the test, the load-bearing frame can be supported by the middle crossbeam and the workbench can push the force-applying frame upward to make the upper pressure plate and the lower pressure plate move relatively, thereby completing the tensile test of the lap-welded threaded steel bars, that is, completing the purpose of the reaction force structure that converts the tensile force of the lap-welded threaded steel bars into pressure.
[0015] 3. Since one end of the buffer spring is fixedly connected to the bottom plate, and the other end is movably connected to the lower pressing plate, and the spring guide rod is accommodated inside the buffer spring with one end fixedly connected to the bottom plate and the other end movably connected to the lower pressing plate, the buffer spring and the spring guide rod are used to buffer the force application frame and the force receiving frame after the lap-welded deformed steel bar is broken in the experiment, avoiding rapid collision of the equipment, and at the same time, it can also support the space for accommodating the jack.
[0016] 4. Since the positioning pin is adapted to the oil cylinder piston, the positioning pin can center the reaction force stretching device, facilitating the rapid positioning and setting of the reaction force stretching device. Description of the Drawings
[0017] Figure 1 It is a schematic diagram of the overall structure in a lap-welded deformed steel bar reaction force stretching device of the present utility model;
[0018] Figure 2 It is a schematic diagram of the structure of the reaction force stretching device in a lap-welded deformed steel bar reaction force stretching device of the present utility model;
[0019] In the figure: 1, oil cylinder piston; 2, workbench; 3, column; 4, reaction force stretching device; 5, middle cross beam; 6, positioning pin; 7, bottom plate; 8, support pillar; 9, buffer spring; 10, spring guide rod; 11, upper pressing plate; 12, oil-free bearing; 13, pressure rod; 14, top plate; 15, deformed steel bar nut; 16, gasket; 17, lap-welded deformed steel bar; 18, lower pressing plate; 19, jack. Detailed Embodiments
[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0021] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "joined", "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following will describe the embodiments according to the overall structure of the present utility model.
[0022] In an embodiment of the present utility model, a lapped welded deformed bar reaction force tensile device includes a hydraulic testing machine device for accommodating and detecting the reaction force tensile device 4 and the lapped welded deformed bar 17; a reaction force tensile device 4 including a force application frame and a force receiving frame, where the force application frame and the force receiving frame cooperate to detect the tensile force of the lapped welded deformed bar 17; and a safety mechanism provided inside the reaction force tensile device 4 for buffering the force application frame and the force receiving frame after the lapped welded deformed bar 17 is detected to break.
[0023] As a further solution of the present utility model: a lapped welded deformed bar reaction force tensile device, the hydraulic testing machine device includes an oil cylinder piston 1, a workbench 2, a column 3, and a middle crossbeam 5. The output end of the oil cylinder piston 1 is fixedly connected to the workbench 2. One end of the column 3 is movably connected to the workbench 2 and the other end is movably connected to the middle crossbeam 5. One side of the reaction force tensile device 4 is movably connected to the workbench 2 and the other side is movably connected to the middle crossbeam 5.
[0024] As a further solution of the utility model: a lap-welded threaded steel reaction force stretching device, the force-applying frame includes a bottom plate 7, a support 8 and an upper pressure plate 11, the force-bearing frame includes a pressure rod 13, a top plate 14 and a lower pressure plate 18, one end of the support 8 is fixedly connected to the bottom plate 7, and the other end is fixedly connected to the upper pressure plate 11, one end of the pressure rod 13 is fixedly connected to the top plate 14, and the other end is fixedly connected to the lower pressure plate 18, the pressure rod 13 is movably connected to the upper pressure plate 11 through an oil-free bearing 12, the upper pressure plate 11 and the lower pressure plate 18 are both clamped with lap-welded threaded steel 17, and the two groups of lap-welded threaded steel 17 are movably connected.
[0025] Other embodiments of the present invention: Since the pressure rod 13 is movably connected to the upper pressure plate 11 through the oil-free bearing 12, the oil-free bearing 12 can reduce the friction of the pressure rod 13 during the movement of the pressure rod 13, thereby improving the accuracy of the test data.
[0026] Other embodiments of the utility model: Since the force-applying frame includes a bottom plate 7, a support column 8 and an upper pressure plate 11, and the force-bearing frame includes a pressure rod 13, a top plate 14 and a lower pressure plate 18, during the test, the middle cross beam 5 can be used to support the force-bearing frame and the workbench 2 can push the force-applying frame upward, so that the upper pressure plate 11 and the lower pressure plate 18 can move relative to each other, thereby completing the tensile test of the lap-welded threaded steel bars 17, that is, completing the purpose of the reaction force structure that converts the tensile force of the lap-welded threaded steel bars 17 into pressure.
[0027] As a further solution of the utility model: a lap-welded threaded steel reaction force stretching device, the safety mechanism includes a buffer spring 9 and a spring guide rod 10, one end of the buffer spring 9 is fixedly connected to the bottom plate 7, and the other end is movably connected to the lower pressure plate 18, the spring guide rod 10 is accommodated in the buffer spring 9 and one end is fixedly connected to the bottom plate 7, and the other end of the spring guide rod 10 is movably connected to the lower pressure plate 18.
[0028] Other embodiments of the utility model: Since one end of the buffer spring 9 is fixedly connected to the base plate 7 and the other end is movably connected to the lower pressure plate 18, the spring guide rod 10 is accommodated in the buffer spring 9 and one end is fixedly connected to the base plate 7 and the other end of the spring guide rod 10 is movably connected to the lower pressure plate 18. Therefore, the buffer spring 9 and the spring guide rod 10 are used to buffer the force-applying frame and the force-bearing frame after the lap-welded threaded steel bar 17 is experimentally broken to avoid rapid collision of the equipment, and at the same time, the space for accommodating the jack 19 can also be supported.
[0029] As a further solution of the present utility model: A lap-welded deformed bar reaction tensile device further includes a deformed bar nut 15 and a gasket 16. The upper pressure plate 11 is clamped and connected to the lap-welded deformed bar 17 through the deformed bar nut 15 and the gasket 16, and the lower pressure plate 18 is clamped and connected to the lap-welded deformed bar 17 through the deformed bar nut 15 and the gasket 16.
[0030] As a further solution of the present utility model: A lap-welded deformed bar reaction tensile device further includes a jack 19. The jack 19 is fixedly installed on one side of the bottom plate 7, and the output end of the jack 19 is movably connected to the lower pressure plate 18.
[0031] As a further solution of the present utility model: A lap-welded deformed bar reaction tensile device further includes a positioning pin 6, and the positioning pin 6 is adapted to the oil cylinder piston 1.
[0032] Other embodiments of the present utility model: Since the positioning pin 6 is adapted to the oil cylinder piston 1, the positioning pin 6 can center the reaction tensile device 4, facilitating the quick positioning of the reaction tensile device 4.
[0033] The working principle of the present utility model is as follows: In the laboratory, first, two lap-welded deformed bars 17 are respectively fixedly installed in the force-bearing frame and the force-applying frame by using the deformed bar nut 15 and the gasket 16. Then, the lower pressure plate 18 is lifted by the jack 19 to an appropriate height, and the prepared specimen is directly placed in place through the notches of the upper pressure plate 11 and the lower pressure plate 18. After unloading the jack 19 and taking it out, at this time, the force-bearing frame is suspended on the force-applying frame through the specimen. This device has a compact structure, high frame stiffness, convenient experiment, and accurate data.
[0034] The above-mentioned is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.
Claims
1. A lap-welded threaded steel counter-tensioning device, characterized in that: It comprises a hydraulic testing machine device, wherein the hydraulic testing machine device is used for the accommodation detection of the reaction force stretching device (4) and the overlap welded threaded steel bar (17); A reaction force stretching device (4), the reaction force stretching device (4) comprising a force applying frame and a force receiving frame, the force applying frame and the force receiving frame cooperate to perform tensile force detection of lap welded threaded steel bars (17); and A safety mechanism is arranged inside the reaction force stretching device (4) and is used to buffer the force applying frame and the force receiving frame after the overlap welded threaded steel bar (17) is detected to be broken.
2. The lap-welded threaded steel counter-tensioning device according to claim 1, characterized in that: The hydraulic testing machine equipment comprises an oil cylinder piston (1), a workbench (2), a column (3) and a middle cross beam (5); the output end of the oil cylinder piston (1) is fixedly connected to the workbench (2); one end of the column (3) is movably connected to the workbench (2) and the other end is movably connected to the middle cross beam (5); one side of the reaction force stretching device (4) is movably connected to the workbench (2) and the other side is movably connected to the middle cross beam (5).
3. The lap-welded threaded steel counter-tensioning device according to claim 2, characterized in that: The force-applying frame comprises a bottom plate (7), a support (8) and an upper pressure plate (11); the force-bearing frame comprises a pressure rod (13), a top plate (14) and a lower pressure plate (18); one end of the support (8) is fixedly connected to the bottom plate (7), and the other end is fixedly connected to the upper pressure plate (11); one end of the pressure rod (13) is fixedly connected to the top plate (14), and the other end is fixedly connected to the lower pressure plate (18); the pressure rod (13) is movably connected to the upper pressure plate (11) via an oil-free bearing (12); the upper pressure plate (11) and the lower pressure plate (18) are both internally clamped with lap-welded threaded steel bars (17); and two groups of the lap-welded threaded steel bars (17) are movably connected.
4. The lap-welded threaded steel counter-tensioning device according to claim 3, characterized in that: The safety mechanism comprises a buffer spring (9) and a spring guide rod (10); one end of the buffer spring (9) is fixedly connected to the bottom plate (7) and the other end is movably connected to the lower pressure plate (18); the spring guide rod (10) is accommodated inside the buffer spring (9) and one end of the spring guide rod (10) is fixedly connected to the bottom plate (7), and the other end of the spring guide rod (10) is movably connected to the lower pressure plate (18).
5. The lap-welded threaded steel counter-tensioning device according to claim 4, characterized in that: It also includes a threaded steel nut (15) and a gasket (16), wherein the upper pressing plate (11) is clamped and connected to the overlap-welded threaded steel (17) via the threaded steel nut (15) and the gasket (16), and the lower pressing plate (18) is clamped and connected to the overlap-welded threaded steel (17) via the threaded steel nut (15) and the gasket (16).
6. The lap-welded threaded steel counter-tensioning device according to claim 5, characterized in that: It also includes a jack (19), which is fixedly mounted on one side of the bottom plate (7), and an output end of the jack (19) is movably connected to the lower pressure plate (18).
7. The lap-welded threaded steel counter-tensioning device according to claim 6, characterized in that: It also includes a positioning pin (6), wherein the positioning pin (6) is matched with the oil cylinder piston (1).