Reinforcing steel bar strength detection machine

Abstract

The utility model discloses a reinforcing steel bar strength detection machine, relates to building detection field, include the detection platform, L-shaped stretch bending column and L-shaped moving block, through setting up the fixed subassembly, the inserted link stretches into the slot to fix the position of L-shaped moving block, thereby avoiding the displacement that the L-shaped moving block moves to cause the reinforcing steel bar in the reinforcing steel bar stretch bending period, and the accuracy of the reinforcing steel bar strength detection machine is improved. A rotating plate is rotated to drive a rectangular rod to rotate by 90 degrees, so that a spring can push clamping plates to be close to each other, an inserting rod is driven to be separated from an inserting groove, and the position of an L-shaped moving block is conveniently adjusted according to the length of a steel bar or the L-shaped moving block is taken out to be replaced and maintained; by arranging a limiting assembly, a rotary knob is rotated to drive a lifting plate to move downwards to enable the bottom face of the lifting plate to be close to the top of the steel bar, the steel bar can be prevented from moving upwards, and therefore the limiting effect on the steel bar is improved.

Description

Technical Field

[0001] The utility model relates to the field of building inspection, in particular to a steel bar strength detector. Background Art

[0002] The inspection of construction project quality refers to the activity of testing and determining the quality characteristics of construction project materials, components, equipment, as well as the quality of the project entity and service functions, etc. according to relevant national laws and regulations, mandatory engineering construction standards and design documents. The inspection of construction project quality includes the inspection of steel structures. Steel bars are a kind of material often used in steel structures. A steel bar strength detector is required for the inspection of steel bar strength.

[0003] As disclosed in a utility model with the authorization announcement number of CN220603190U, a steel bar strength detection mechanism slides two sliding blocks along a sliding column to a position suitable for the length of the steel bar, places the steel bar between the two sliding blocks and a bending column. The staff operates the PLC controller to start the servo motor, which can drive the lead screw to rotate, thereby driving the bending column to move backward to bend the steel bar. When the steel bar is bent, the servo motor is turned off, and the result of the steel bar strength detection can be read through the reading of the dynamometer. By setting a nut, turning the nut to disengage the nut from the dynamometer can facilitate the removal of the dynamometer for replacement or repair. By setting a limit block, the limit block can be rotated through a hinge to facilitate the removal of the sliding block along the sliding column for replacement.

[0004] The following problems still exist when this prior art is used:

[0005] The sliding block of the device can move back and forth along the sliding column. When the bending column bends the steel bar, the steel bar closely adheres to and presses the sliding block. When the steel bar is bent, if the staff does not turn off the servo motor in time, the bent steel bar pressing the sliding block is likely to push the sliding block to move along the sliding column, resulting in the displacement of the steel bar, thereby changing the value displayed by the dynamometer and affecting the result of the steel bar strength detection. Summary of the Utility Model

[0006] In order to overcome the deficiencies of the prior art, the utility model provides a steel bar strength detector to solve the technical problems mentioned in the above background.

[0007] To solve the above technical problems, the utility model provides the following technical solution: A steel bar strength detector, comprising an inspection table, an L-shaped bending column and an L-shaped moving block. The top surface of the inspection table is provided with an L-shaped bending column and symmetric L-shaped moving blocks;

[0008] A fixing component is arranged below the L-shaped moving block, and the fixing component can fix the position of the L-shaped moving block;

[0009] A limiting ring is arranged inside the detection table, and the limiting ring can improve the limiting effect on the fixing component;

[0010] A limiting component is arranged on the side of the L-shaped moving block, and the limiting component can improve the limiting effect on the steel bar.

[0011] As a preferred technical solution of the present utility model, a servo motor is fixedly installed on the top surface of the detection table. The end of the output end of the servo motor is fixedly provided with a first bevel gear. A second bevel gear is meshed behind the first bevel gear. A first threaded rod is fixedly provided on the side of the second bevel gear. The other side of the second bevel gear is rotatably connected to a fixed block through a bearing. The bottom surface of the fixed block is fixedly connected to the detection table. A threaded sleeve is threadedly connected to the outside of the first threaded rod. The bottom surface of the threaded sleeve is fixedly provided with a T-shaped slide bar. A first T-shaped chute adapted to the T-shaped slide bar is arranged on the top surface of the detection table. The T-shaped slide bar is slidably connected to the detection table through the first T-shaped chute. An L-shaped connecting rod is arranged on the top surface of the detection table. The vertical part of the L-shaped connecting rod is fixedly connected to the threaded sleeve. Fixing plates are fixedly provided on the inner sides of the horizontal parts of the L-shaped connecting rod and the L-shaped bending column. A fixing rod is fixedly provided on the top surface of the fixing plate. A fourth threaded rod is fixedly provided on the top surface of the fixing rod. A nut is threadedly connected to the outside of the fourth threaded rod. A dynamometer is installed between the L-shaped connecting rod and the L-shaped bending column. A through hole adapted to the fixing rod is arranged through the top surface of the dynamometer. The fixing rod passes through the dynamometer through the through hole and is slidably connected to the dynamometer.

[0012] As a preferred technical solution of the present utility model, the fixing component includes a first T-shaped slider, a rectangular rod, a clamping plate, a spring, a plug rod and a third threaded rod. The bottom surface of the L-shaped moving block is fixedly provided with a first T-shaped slider. Symmetric third threaded rods are arranged inside the detection table. Rectangular rods are fixedly provided on the sides of the third threaded rods away from each other. Clamping plates are arranged on the left and right sides of the rectangular rod. Plug rods and a plurality of springs are fixedly provided on the outer sides of the clamping plates.

[0013] As a preferred technical solution of the present utility model, a second T-shaped chute adapted to the first T-shaped slider is provided on the top surface of the inspection table. The first T-shaped slider is slidably connected to the inspection table through the second T-shaped chute. A threaded groove adapted to the third threaded rod is communicated with the inner wall of the second T-shaped chute. The third threaded rod is threadedly connected to the inspection table through the threaded groove. A limiting groove adapted to the limiting ring is communicated with one side of the threaded groove away from the second T-shaped chute. The limiting ring is movably connected to the inspection table through the limiting groove. One side of the third threaded rod away from the rectangular rod is fixedly connected to the limiting ring. A through groove penetrating from the front to the back is provided on the front surface of the first T-shaped slider. The rectangular rod penetrates through the first T-shaped slider through the through groove. The clamping plate is adapted to the through groove. The top surface and the bottom surface of the clamping plate are respectively slidably connected to the inner wall of the through groove. One end of the spring away from the clamping plate is fixedly connected to the inner wall of the through groove. A guiding groove adapted to the insertion rod is provided on the side surface of the first T-shaped slider. The insertion rod penetrates through the first T-shaped slider through the guiding groove and is slidably connected to the first T-shaped slider. A plurality of card slots adapted to the insertion rod are linearly arranged on the inner wall of the second T-shaped chute. The insertion rod is slidably connected to the inspection table through the card slots.

[0014] As a preferred technical solution of the present utility model, the limiting component includes a knob, a second threaded rod, a lifting plate and a second T-shaped slider. A knob is provided above the horizontal part of the L-shaped moving block. The bottom surface of the knob is fixedly provided with a second threaded rod. The bottom of the second threaded rod is rotatably connected to the lifting plate through a bearing. One side of the lifting plate close to the vertical part of the L-shaped moving block is fixedly provided with a second T-shaped slider.

[0015] As a preferred technical solution of the present utility model, the second threaded rod penetrates through the horizontal part of the L-shaped moving block and is threadedly connected to the horizontal part of the L-shaped moving block. The side surface of the lifting plate is slidably connected to the vertical part of the L-shaped moving block. A third T-shaped chute adapted to the second T-shaped slider is provided on the side surface of the vertical part of the L-shaped moving block. The second T-shaped slider is slidably connected to the vertical part of the L-shaped moving block through the third T-shaped chute.

[0016] Compared with the prior art, the beneficial effects that the present utility model can achieve are:

[0017] By providing a fixing component in the utility model, when the insertion rod extends into the slot, the position of the L-shaped moving block can be fixed, thus preventing the steel bar from shifting due to the movement of the L-shaped moving block during the bending process. Rotating the rotating plate drives the rectangular rod to rotate by 90 degrees, causing the spring to push the clamping plates closer to each other, thereby driving the insertion rod out of the slot, facilitating the adjustment of the position of the L-shaped moving block according to the length of the steel bar or removing the L-shaped moving block for replacement or repair. By providing a limiting ring, the limiting ring can limit the rectangular rod to prevent the rectangular rod from rotating and causing the third threaded rod to separate from the test bench, resulting in the loss of the rectangular rod. By providing a limiting component, rotating the knob drives the lifting plate to move downward so that the bottom surface of the lifting plate is close to the top of the steel bar, which can prevent the steel bar from moving upward, thereby improving the limiting effect on the steel bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 is a schematic diagram of a partial cross-sectional structure of the front view of the utility model;

[0020] Figure 3 is a schematic diagram of a cross-sectional structure of the left view of the utility model;

[0021] Figure 4 is a schematic diagram of the structure of the utility model when the dynamometer is disassembled;

[0022] Figure 5 is a schematic diagram of the rectangular rod structure of the utility model;

[0023] Wherein: 1, test bench; 2, servo motor; 3, first bevel gear; 4, second bevel gear; 5, first threaded rod; 6, threaded sleeve; 7, L-shaped connecting rod; 8, dynamometer; 9, L-shaped bending column; 10, L-shaped moving block; 11, first T-shaped slider; 12, rectangular rod; 13, knob; 14, second threaded rod; 15, lifting plate; 16, second T-shaped slider; 17, clamping plate; 18, spring; 19, insertion rod; 20, third threaded rod; 21, limiting ring; 22, fixing plate; 23, fixing rod; 24, fourth threaded rod; 25, nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the technical means, creative features, achieved purposes and effects of the utility model easy to understand, the following specific embodiments are used to further illustrate the utility model. However, the following embodiments are only the preferred embodiments of the utility model and not all of them. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the utility model.

[0025] Embodiment

[0026] Please refer toFigures 1 - 4 As shown in the figure, the utility model provides a steel bar strength detector, which includes a detection table 1, an L-shaped bending column 9 and an L-shaped moving block 10. An L-shaped connecting rod 7, an L-shaped bending column 9 and symmetric L-shaped moving blocks 10 are arranged on the top surface of the detection table 1. The steel bar to be detected is placed between the L-shaped bending column 9 and the symmetric L-shaped moving blocks 10. Pulling the L-shaped bending column 9 can bend the steel bar. A dynamometer 8 is installed between the L-shaped connecting rod 7 and the L-shaped bending column 9. Pulling the L-shaped connecting rod 7 can drive the dynamometer 8 and the L-shaped bending column 9 to move. The dynamometer 8 can display the tension received by the L-shaped bending column 9 when the steel bar just starts to bend. The staff can read the data of the dynamometer 8 to detect the strength of the steel bar.

[0027] As Figures 1 - 4 Shown in the figure, fixed plates 22 are fixedly arranged on the inner sides of the horizontal parts of the L-shaped connecting rod 7 and the L-shaped bending column 9. A fixed rod 23 is fixedly arranged on the top surface of the fixed plate 22. A fourth threaded rod 24 is fixedly arranged on the top surface of the fixed rod 23. A nut 25 is threadedly connected to the outside of the fourth threaded rod 24. A dynamometer 8 is installed between the L-shaped connecting rod 7 and the L-shaped bending column 9. A through hole adapted to the fixed rod 23 is provided through the top surface of the dynamometer 8. The fixed rod 23 passes through the dynamometer 8 through the through hole and is slidably connected to the dynamometer 8. The outer diameter length of the fourth threaded rod 24 is smaller than the outer diameter length of the fixed rod 23. The fixed plates 22, the fixed rods 23, the fourth threaded rods 24 and the nuts 25 can facilitate the replacement or maintenance of the dynamometer 8.

[0028] Specifically, when the dynamometer 8 needs to be disassembled, rotate the nut 25 to drive the nut 25 to move upward and disengage from the fourth threaded rod 24. Move the dynamometer 8 upward so that the dynamometer 8 disengages from the fixed rod 23 and moves above the L-shaped connecting rod 7 and the L-shaped bending column 9, and the dynamometer 8 can be removed. When the dynamometer 8 needs to be installed, align the replaced or repaired dynamometer 8 with the fixed rod 23 and move it downward to install the dynamometer 8. After the dynamometer 8 is installed on the top surface of the fixed plate 22, rotate the nut 25 to thread the nut 25 onto the fourth threaded rod 24, and the bottom surface of the nut 25 is in close contact with the dynamometer 8, so as to fix the position of the dynamometer 8 relative to the L-shaped connecting rod 7 and the L-shaped bending column 9.

[0029] As Figures 1 - 3As shown in the figure, a servo motor 2 is fixedly installed on the top surface of the detection table 1. The end of the output shaft of the servo motor 2 is fixedly provided with a first bevel gear 3. A second bevel gear 4 is engaged behind the first bevel gear 3. A first threaded rod 5 is fixedly provided on the side of the second bevel gear 4. The other side of the second bevel gear 4 is rotatably connected to a fixed block through a bearing. The bottom surface of the fixed block is fixedly connected to the detection table 1. A threaded sleeve 6 is threadedly connected to the outside of the first threaded rod 5. A T-shaped slide bar is fixedly provided on the bottom surface of the threaded sleeve 6. A first T-shaped chute adapted to the T-shaped slide bar is provided on the top surface of the detection table 1. The T-shaped slide bar is slidably connected to the detection table 1 through the first T-shaped chute. An L-shaped connecting rod 7 is provided on the top surface of the detection table 1. The vertical part of the L-shaped connecting rod 7 is fixedly connected to the threaded sleeve 6. By controlling the servo motor 2 to drive the first bevel gear 3 to rotate, the rotation of the first bevel gear 3 drives the second bevel gear 4 to rotate, the rotation of the second bevel gear 4 drives the first threaded rod 5 to rotate, and the rotation of the first threaded rod 5 can drive the threaded sleeve 6 to move in the direction close to the second bevel gear 4, thereby pulling the L-shaped connecting rod 7, the force gauge 8 and the L-shaped bending column 9 to move on the top surface of the detection table 1, facilitating the bending of the steel bar by the L-shaped bending column 9.

[0030] As Figures 1 - 5As shown in the figure, a fixing component is arranged below the L-shaped moving block 10. The fixing component is composed of a first T-shaped slider 11, a rectangular rod 12, a clamping plate 17, a spring 18, a plug rod 19 and a third threaded rod 20. The bottom surface of the L-shaped moving block 10 is fixedly provided with the first T-shaped slider 11. The top surface of the detection table 1 is provided with a second T-shaped chute adapted to the first T-shaped slider 11. The first T-shaped slider 11 is slidably connected to the detection table 1 through the second T-shaped chute. Symmetric third threaded rods 20 are arranged inside the detection table 1. Threaded grooves adapted to the third threaded rods 20 are communicated with the inner wall of the second T-shaped chute. The third threaded rods 20 are threadedly connected to the detection table 1 through the threaded grooves. Rectangular rods 12 are fixedly provided on the sides of the third threaded rods 20 away from each other. Symmetric clamping plates 17 are arranged on the left and right sides of the rectangular rod 12. A through groove penetrating from the front to the back is arranged on the front surface of the first T-shaped slider 11. The rectangular rod 12 penetrates through the first T-shaped slider 11 through the through groove. A rotating plate is fixedly provided on the side of the rectangular rod 12 away from the third threaded rod 20. The clamping plate 17 is adapted to the through groove. The top surface and the bottom surface of the clamping plate 17 are respectively slidably connected to the inner wall of the through groove. Plug rods 19 and a plurality of springs 18 are fixedly provided on the outer side of the clamping plate 17. One end of the spring 18 away from the clamping plate 17 is fixedly connected to the inner wall of the through groove. A guiding groove adapted to the plug rod 19 is arranged through the side surface of the first T-shaped slider 11. The plug rod 19 penetrates through the first T-shaped slider 11 through the guiding groove and is slidably connected to the first T-shaped slider 11. A plurality of slots adapted to the plug rod 19 are arranged in a linear array on the inner wall of the second T-shaped chute. The plug rod 19 is slidably connected to the detection table 1 through the slots. The cross-sectional shape of the third threaded rod 20 is a rectangle with unequal adjacent side lengths. The thrust of the spring 18 on the clamping plate 17 makes the clamping plate 17 always close to the rectangular rod 12. Every time the third threaded rod 20 rotates 90 degrees, the distance between the clamping plates 17 can reach the maximum or the minimum. When the distance between the clamping plates 17 reaches the maximum, the plug rod 19 extends into the slot to fix the position of the L-shaped moving block 10, so as to avoid the displacement of the steel bar caused by the movement of the L-shaped moving block 10 during the bending of the steel bar. Rotating the rotating plate in the reverse direction drives the rectangular rod 12 to rotate 90 degrees, which can make the spring 18 push the clamping plates 17 closer to each other. The third threaded rod 20 rotates 90 degrees relative to the detection table 1 along the threaded groove. At this time, the plug rod 19 just disengages from the slot, so as to release the limit on the L-shaped moving block 10, which is convenient for adjusting the position of the L-shaped moving block 10 according to the length of the steel bar or taking out the L-shaped moving block 10 for replacement or repair. When the L-shaped moving block 10 moves to the designated position, the plug rod 19 just aligns with the slot. Rotating the rotating plate to drive the rectangular rod 12 to rotate 90 degrees can make the plug rod 19 extend into the slot to fix the position of the L-shaped moving block 10 again. A limiting groove is communicated with the side of the threaded groove away from the second T-shaped chute. The limiting grooves are symmetrically arranged inside the detection table 1. A limiting ring 21 is movably connected to the inner wall of the limiting groove. The side of the third threaded rod 20 away from the rectangular rod 12 is fixedly connected to the limiting ring 21. The limiting ring 21 can limit the rectangular rod 12 to prevent the rectangular rod 12 from rotating and driving the third threaded rod 20 to disengage from the detection table 1, resulting in the loss of the rectangular rod 12.

[0031] As shown Figures 1 - 3 in the figure, a limiting component is arranged on the side of the L-shaped moving block 10. The limiting component is composed of a knob 13, a second threaded rod 14, a lifting plate 15 and a second T-shaped slider 16. A knob 13 is arranged above the horizontal part of the L-shaped moving block 10. The bottom surface of the knob 13 is fixedly provided with a second threaded rod 14. The second threaded rod 14 penetrates through the horizontal part of the L-shaped moving block 10 and is threadedly connected with the horizontal part of the L-shaped moving block 10. The bottom of the second threaded rod 14 is rotationally connected with a lifting plate 15 through a bearing. The side surface of the lifting plate 15 is slidably connected with the vertical part of the L-shaped moving block 10. A second T-shaped slider 16 is fixedly arranged on one side of the lifting plate 15 close to the vertical part of the L-shaped moving block 10. A third T-shaped sliding groove adapted to the second T-shaped slider 16 is arranged on the side surface of the vertical part of the L-shaped moving block 10. The second T-shaped slider 16 is slidably connected with the vertical part of the L-shaped moving block 10 through the third T-shaped sliding groove. Rotating the knob 13 drives the lifting plate 15 to move downward so that the bottom surface of the lifting plate 15 is close to the top of the steel bar, which can prevent the steel bar from moving upward, thereby improving the limiting effect on the steel bar.

[0032] Specific working principle:

[0033] When the device is in use, rotating the rotating plate drives the rectangular rod 12 to rotate 90 degrees, so that the spring 18 pushes the clamping plates 17 to approach each other. The third threaded rod 20 rotates 90 degrees relative to the detection table 1 along the thread groove. At this time, the insertion rod 19 just disengages from the insertion slot, thereby releasing the limit on the L-shaped moving block 10, facilitating adjusting the position of the L-shaped moving block 10 according to the length of the steel bar or taking out the L-shaped moving block 10 for replacement or repair. When the L-shaped moving block 10 moves to the specified position, the insertion rod 19 is just aligned with the insertion slot. Rotating the rotating plate drives the rectangular rod 12 to rotate 90 degrees so that the insertion rod 19 extends into the insertion slot, and the distance between the clamping plates 17 reaches the maximum, fixing the position of the L-shaped moving block 10 again, thereby preventing the L-shaped moving block 10 from moving during the bending of the steel bar and causing the steel bar to shift. Place the steel bar to be detected between the L-shaped bending column 9 and the symmetrical L-shaped moving blocks 10. Rotating the knob 13 drives the lifting plate 15 to move downward so that the bottom surface of the lifting plate 15 is close to the top of the steel bar, which can prevent the steel bar from moving upward, thereby improving the limiting effect on the steel bar. Control the servo motor 2 to drive the first bevel gear 3 to rotate. The rotation of the first bevel gear 3 drives the second bevel gear 4 to rotate. The rotation of the second bevel gear 4 drives the first threaded rod 5 to rotate. The rotation of the first threaded rod 5 can drive the threaded sleeve 6 to move towards the direction close to the second bevel gear 4, thereby pulling the L-shaped connecting rod 7, the force gauge 8 and the L-shaped bending column 9 to move on the top surface of the detection table 1. Bend the steel bar through the movement of the L-shaped bending column 9. When the steel bar just starts to bend, turn off the servo motor 2. The staff reads the tension received by the L-shaped bending column 9 shown on the force gauge 8, and the detection of the strength of the steel bar can be realized.

[0034] When it is necessary to disassemble the dynamometer 8, turn the nut 25 to drive the nut 25 to move upward and disengage from the fourth threaded rod 24. Move the dynamometer 8 upward so that the dynamometer 8 moves away from the fixed rod 23 and moves above the L-shaped connecting rod 7 and the L-shaped bending column 9, and the dynamometer 8 can be removed. When it is necessary to install the dynamometer 8, align the replaced or repaired dynamometer 8 with the fixed rod 23 and move it downward to install the dynamometer 8. After the dynamometer 8 is installed on the top surface of the fixing plate 22, turn the nut 25 so that the nut 25 is threadedly connected to the fourth threaded rod 24, and the bottom surface of the nut 25 is in close contact with the dynamometer 8, thereby fixing the position of the dynamometer 8 relative to the L-shaped connecting rod 7 and the L-shaped bending column 9.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel bar strength testing machine, comprising a testing platform (1), an L-shaped bending column (9) and an L-shaped moving block (10), wherein the top surface of the testing platform (1) is provided with an L-shaped bending column (9) and a symmetrical L-shaped moving block (10), characterized in that: A fixing component, which is arranged below the L-shaped moving block (10) and can fix the position of the L-shaped moving block (10); A limiting ring (21), wherein the limiting ring (21) is arranged inside the detection platform (1), and the limiting ring (21) can improve the limiting effect on the fixed component; A limiting component is arranged on the side of the L-shaped moving block (10), and the limiting component can improve the limiting effect on the steel bars.

2. A steel bar strength testing machine according to claim 1, characterized in that: A servo motor (2) is fixedly mounted on the top surface of the detection platform (1); a first bevel gear (3) is fixedly arranged at the output end of the servo motor (2); a second bevel gear (4) is meshed behind the first bevel gear (3); a first threaded rod (5) is fixedly arranged on the side of the second bevel gear (4); a fixed block is rotatably connected to the other side of the second bevel gear (4) via a bearing; the bottom surface of the fixed block is fixedly connected to the detection platform (1); a threaded sleeve (6) is threadedly connected to the outer side of the first threaded rod (5); a T-shaped slide bar is fixedly arranged on the bottom surface of the threaded sleeve (6); a first T-shaped slide bar adapted to the T-shaped slide bar is arranged on the top surface of the detection platform (1); the T-shaped slide bar is slidably connected to the detection platform (1) via the first T-shaped slide bar; the detection platform (1) An L-shaped connecting rod (7) is arranged on the top surface, the vertical part of the L-shaped connecting rod (7) is fixedly connected to the threaded sleeve (6), a fixing plate (22) is fixedly arranged on the inner side of the transverse part of the L-shaped connecting rod (7) and the L-shaped bending column (9), a fixing rod (23) is fixedly arranged on the top surface of the fixing plate (22), a fourth threaded rod (24) is fixedly arranged on the top surface of the fixing rod (23), a nut (25) is threadedly connected to the outer side of the fourth threaded rod (24), a dynamometer (8) is installed between the L-shaped connecting rod (7) and the L-shaped bending column (9), a through hole adapted to the fixing rod (23) is penetrated on the top surface of the dynamometer (8), the fixing rod (23) penetrates the dynamometer (8) through the through hole and is slidably connected to the dynamometer (8).

3. A steel bar strength testing machine according to claim 1, characterized in that: The fixing assembly comprises a first T-shaped slider (11), a rectangular rod (12), a clamping plate (17), a spring (18), an insertion rod (19) and a third threaded rod (20); the first T-shaped slider (11) is fixedly arranged on the bottom surface of the L-shaped moving block (10); a symmetrical third threaded rod (20) is arranged inside the detection platform (1); a rectangular rod (12) is fixedly arranged on one side of the third threaded rod (20) away from each other; symmetrical clamping plates (17) are arranged on the left and right sides of the rectangular rod (12); and an insertion rod (19) and a plurality of springs (18) are fixedly arranged on the outside of the clamping plate (17).

4. A steel bar strength testing machine according to claim 3, characterized in that: The top surface of the detection platform (1) is provided with a second T-shaped sliding groove adapted to the first T-shaped sliding block (11); the first T-shaped sliding block (11) is slidably connected to the detection platform (1) through the second T-shaped sliding groove; the inner wall of the second T-shaped sliding groove is connected to a thread groove adapted to the third threaded rod (20); the third threaded rod (20) is threadedly connected to the detection platform (1) through the thread groove; the side of the thread groove away from the second T-shaped sliding groove is connected to a limiting groove adapted to a limiting ring (21); the limiting ring (21) is movably connected to the detection platform (1) through the limiting groove; the side of the third threaded rod (20) away from the rectangular rod (12) is fixedly connected to the limiting ring (21); the front surface of the first T-shaped sliding block (11) is provided with The rectangular rod (12) passes through the first T-shaped slider (11) through the through slot, the clamp (17) is matched with the through slot, the top and bottom surfaces of the clamp (17) are respectively slidably connected to the inner wall of the through slot, the end of the spring (18) away from the clamp (17) is fixedly connected to the inner wall of the through slot, the side of the first T-shaped slider (11) is penetrated by a guide slot for fitting the plug rod (19), the plug rod (19) passes through the first T-shaped slider (11) through the guide slot and is slidably connected to the first T-shaped slider (11), the inner wall of the second T-shaped slide groove is provided with a plurality of slots for fitting the plug rod (19) in a linear array, and the plug rod (19) is slidably connected to the detection table (1) through the slot.

5. A steel bar strength testing machine according to claim 1, characterized in that: The limiting assembly comprises a knob (13), a second threaded rod (14), a lifting plate (15) and a second T-shaped slider (16); the knob (13) is arranged above the horizontal part of the L-shaped moving block (10); the second threaded rod (14) is fixedly arranged on the bottom surface of the knob (13); the lifting plate (15) is rotatably connected to the bottom of the second threaded rod (14) via a bearing; and the second T-shaped slider (16) is fixedly arranged on one side of the lifting plate (15) close to the vertical part of the L-shaped moving block (10).

6. A steel bar strength testing machine according to claim 5, characterized in that: The second threaded rod (14) passes through the transverse part of the L-shaped moving block (10) and is threadedly connected to the transverse part of the L-shaped moving block (10); the side of the lifting plate (15) is slidably connected to the vertical part of the L-shaped moving block (10); the side of the vertical part of the L-shaped moving block (10) is provided with a third T-shaped sliding groove adapted to the second T-shaped sliding block (16); the second T-shaped sliding block (16) is slidably connected to the vertical part of the L-shaped moving block (10) through the third T-shaped sliding groove.

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