A quality detector for steel bars in construction projects

Abstract

The present invention discloses a steel bar quality detector for construction engineering, which relates to the technical field of steel bar quality inspection. It includes: a workbench and a mounting seat fixedly connected to the top of the workbench. A support seat is fixedly connected to the top of the mounting seat. A hydraulic cylinder is installed at the bottom of the support seat. The output end of the hydraulic cylinder is connected to a connecting rod, and a pressing head is installed at the bottom of the connecting rod; a steel bar, the steel bar is arranged above the mounting seat, and a bending limiter is arranged between the mounting seat and the mounting seat. The bending limiter includes two connecting seats arranged above the mounting seat. Through the cooperation of parts such as the bending plate, the present invention limits the bending detection of the steel bar. Through the opposite rotation of the bending plate, it can fit the bending deformation trend of the steel bar in real time, and always maintain stable clamping of both ends of the steel bar during the bending process, avoiding the detection failure caused by the springback of the steel bar, thereby improving the detection accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of steel bar quality inspection, and particularly to a steel bar quality detector for construction projects. Background Art

[0002] During the construction process of a construction project, it is usually necessary to use a steel bar cage composed of steel bars to form a mold that can be poured, so as to improve the forming quality of concrete pouring. Before the steel bars are put into use, in order to ensure that the load-bearing capacity of the steel bars can meet the safety standards, it is necessary to conduct certain quality inspections on the steel bars.

[0003] When the existing steel bars are subjected to bending tests, the steel bars are first placed on the top of the detector, and then the detection head is driven by a hydraulic cylinder installed on the detector to squeeze and detect the steel bars. However, the steel bars generally adopt a rigid clamping structure and cannot dynamically adjust the clamping angle according to the real-time deformation trend of the steel bars, which is likely to cause stress concentration at the clamping point. This phenomenon will cause the steel bars to break prematurely, resulting in the test results being lower than the actual load-bearing capacity, thus affecting the accuracy of the test. At the same time, the existing equipment usually only supports single forward bending tests. If a reverse bending test is required, the steel bars need to be manually disassembled and reinstalled, which reduces the test efficiency. At the same time, the secondary clamping is likely to cause the angle of the steel bars to deflect, further affecting the accuracy of subsequent tests. For this reason, we provide a steel bar quality detector for construction projects to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a steel bar quality detector for construction projects to solve the problems that the steel bars generally adopt a rigid clamping structure and cannot dynamically adjust the clamping angle according to the real-time deformation trend of the steel bars, and that the existing equipment usually only supports single forward bending tests. If a reverse bending test is required, the steel bars need to be manually disassembled and reinstalled, which reduces the test efficiency.

[0005] To achieve the above object, the present invention provides the following technical solution: A steel bar quality detector for construction engineering, comprising: a workbench and a mounting seat fixedly connected to the top of the workbench, a support seat fixedly connected to the top of the mounting seat, a hydraulic cylinder installed at the bottom of the support seat, an output end of the hydraulic cylinder connected to a connecting rod, and a pressing head installed at the bottom of the connecting rod; a steel bar, the steel bar is arranged above the mounting seat, and further comprises a bending limiter, the bending limiter includes two connecting seats arranged above the mounting seat, and a bending plate is arranged on the inner side of each of the two connecting seats, a pressing plate is fixedly connected to the inner side of the bending plate by bolts, and the pressing plate presses against the outer wall of the steel bar, and a limiting component for unidirectionally limiting the bending plate is arranged between the connecting seat and the bending plate; a conversion auxiliary member, located between the mounting seat and the connecting seat, and a switching limiting mechanism for cooperating with the operation of the conversion auxiliary member is arranged between the connecting seat and the bending plate.

[0006] As a further scheme of the present invention: The limiting component includes rotating shafts fixedly connected to both ends of the bending plate, and one end of each of the two rotating shafts penetrates to the outside of the connecting seat and is rotatably connected to the connecting seat, a ratchet is fixedly connected to the outer wall of each of the two rotating shafts, two power rods are slidably connected to the inner side of the connecting seat, one end of each of the two power rods penetrates to the outside of the connecting seat and is slidably connected to the connecting seat, one end of the power rod is rotatably connected to a second rotating shaft, a ratchet tooth is fixedly connected to the outer wall of the second rotating shaft, a torsion spring is installed between the ratchet tooth and the power rod, and the ratchet tooth is meshed with the ratchet.

[0007] As a further scheme of the present invention: The helical tooth directions of the outer walls of the two ratchets are arranged in opposite directions, and initially, one of the ratchet teeth is not meshed with the ratchet tooth.

[0008] As a further scheme of the present invention: The conversion auxiliary member includes two vertical seats fixedly connected to the top of the mounting seat, a driving motor is installed on one side of each of the two vertical seats, an output end of the driving motor is connected to a connecting shaft, and one end of the connecting shaft penetrates to the inside of the vertical seat and is rotatably connected to the vertical seat, a connecting disc is arranged at the end of the connecting shaft, a fixing rod is fixedly connected to one end of the connecting disc, and the fixing rod is fixedly connected to the connecting seat, and a roller is rotatably connected to the end of each of the two bending plates.

[0009] As a further solution of the present invention: the conversion auxiliary part also includes a first spur rack slidably connected to the inner side of the connecting shaft, the back side of the first spur rack is fixedly connected to a connecting plate, a power spring is installed between the connecting plate and the connecting shaft, the bottom of the first spur rack is fixedly connected to a second spherical rod, the top of the mounting seat is fixedly connected to a first power ring, the inner side of the first power ring is respectively provided with a first inclined surface, a first track and a second track, the second spherical rod initially rests on the second track, the inner side of the connecting shaft is slidably connected to a fourth spur rack, the inner side of the connecting shaft is rotatably connected to a second spur gear, and the first spur rack, the fourth spur rack and the second spur gear are meshed, and the fourth spur rack is fixedly connected to the connecting disk.

[0010] As a further solution of the present invention: the switching limit mechanism includes a first rotating shaft rotatably connected to the inner side of the connecting seat, the outer wall of the first rotating shaft is fixedly connected to the first spur gear, one end of the two power rods is respectively fixedly connected to the second spur rack and the third spur rack, and the second spur rack and the third spur rack are both engaged with the first spur gear.

[0011] As a further solution of the present invention: the switching limit mechanism also includes a fixed ring fixedly connected to the outer wall of the fixed rod, a moving rod is slidably connected to the inner side of the fixed ring, one end of the moving rod is fixedly connected to an inclined rod, an inclined groove is provided on the inner side of the inclined rod, a connecting column is fixedly connected to the bottom of the second straight rack, and the diameter of the connecting column matches the inclined groove, the connecting column is inserted into the inner side of the inclined groove, and a toggle assembly is provided between the top of the mounting seat and the end of the moving rod.

[0012] As a further solution of the present invention: the toggle assembly includes a fixed sleeve fixedly connected to the top of the mounting seat, a sliding rod is slidably connected to the inner side of the fixed sleeve, an auxiliary spring is installed between the bottom of the sliding rod and the fixed sleeve, a second power ring is fixedly connected to the top of the sliding rod, and the second power ring is rotatably connected to the end of the connecting disk, the end of the second power ring is provided with an inclined surface, the end of the moving rod is fixedly connected to a first spherical rod, and the first spherical rod is initially attached to the inclined surface, and a connecting spring is installed between the moving rod and the fixed ring.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. By setting the cooperation of parts such as the bending plates, when quality inspection of steel bars is required, the steel bar can be placed between the two bending plates. Subsequently, the pressure plate is pressed against the outer wall of the steel bar, and then the pressure plate and the bending plates are fixed by bolts. Then, the output end of the hydraulic cylinder drives the connecting rod to drive the pressing head to move downward to perform the pressing and bending inspection operation on the middle part of the steel bar. When the steel bar is bent, it can drive the two bending plates to rotate towards each other, thereby limiting the bending inspection of the steel bar. Through the rotation of the bending plates towards each other, it can always fit the bending deformation trend of the steel bar, and maintain stable clamping of both ends of the steel bar during the bending process, avoiding the detection failure caused by the springback of the steel bar, and thus improving the accuracy of the detection;

[0015] 2. By setting the cooperation of parts such as the ratchet wheels, when the bending plates rotate clockwise, it can drive the clockwise ratchet wheels to rotate, thereby driving the ratchet teeth to rotate. When the ratchet teeth are engaged with the ratchet wheel teeth under the action of the torsion spring, it limits the ratchet wheel, and further enables the bending plates to be unidirectionally limited during the clockwise rotation. When the steel bar undergoes plastic deformation under pressure, the bending plates can rotate along the deformation direction, but the ratchet teeth will be stuck into the ratchet wheel to prevent reverse rotation, thereby stably maintaining the steel bar in the bent state, thus improving the stability of the device during detection;

[0016] 3. By setting the cooperation of parts such as the driving motor, the output end of the driving motor drives the connecting shaft to drive the connecting seat to rotate through the fixed rod, so that the two bending plates are flipped 180 degrees, making the steel bar that has been bent once face downward. When the connecting shaft rotates, it drives the second spherical rod to rotate at the same time. When the second spherical rod moves along the second track towards the first inclined surface direction, it can push the second spherical rod to drive the connecting plate to move upward through the first straight rack, and then drive the fourth straight rack to drive the connecting plate to move downward through the second spur gear, thereby reducing the rotation radius of the bending plates. When the bending plates rotate 180 degrees, the second spherical rod rotates to the notch of the first power ring, so that the power spring drives the first straight rack to reset, and further drives the fourth straight rack to drive the flipped bending plates to move downward, making the rollers at the ends of the bending plates abut against the inner top of the mounting seat. At this time, the power spring is still in a compressed state, enabling the bending plates after flipping 180 degrees to support on the ground. Furthermore, when the steel bar is subjected to reverse extrusion detection, the two bending plates can provide good support as the power spring resets during the reverse bending process with a large curvature of the steel bar. At the beginning of the reverse bending detection of the steel bar, since the steel bar has completed the forward bending and may have a large initial bending angle, at this time, the bending plates abut against the inner top of the mounting seat, which can provide a stable starting support point for the entire detection device. In this way, it can ensure that at the beginning stage of the reverse bending, the position and posture of the steel bar are relatively stable, avoiding inaccurate detection data caused by initial instability and improving the reliability of the detection results;

[0017] 4. By setting the cooperation of parts such as the first spherical rod, when the bending plate rotates 180 degrees downward from the front, the first spherical rod moves along the inclined plane towards the end of the second power ring, and then drives the first spherical rod to drive the sliding rod to move towards the connecting column. Then, under the action of the inclined groove, the connecting column is pushed to drive the second straight rack to move towards the first spur gear, causing one ratchet tooth to gradually separate from the corresponding ratchet wheel, and the third straight rack drives the other ratchet tooth to move towards the ratchet wheel, so that the other ratchet tooth meshes with the ratchet wheel. Since the helical teeth on the outer walls of the two ratchet wheels are arranged in opposite directions, the ratchet wheel and the ratchet teeth during the forward rotation of the original bending plate are no longer meshed. When the bending plate is reset to the horizontal position, it is limited by the other ratchet wheel and ratchet teeth. When the bending plate rotated downward gradually rotates to the horizontal state, the other ratchet wheel and ratchet teeth can perform one-way limiting on it, enabling effective one-way limiting of the bending plate in bending detections in different directions, thereby further improving the detection accuracy of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] Figure 2 is a schematic top view of the mounting seat of the present invention;

[0020] Figure 3 for the present invention Figure 2 is an enlarged view at A in the present invention;

[0021] Figure 4 is a schematic diagram of the structure of the bending plate after flipping of the present invention;

[0022] Figure 5 is a schematic diagram of the structure of the bending plate after bending of the present invention;

[0023] Figure 6 is a schematic diagram of the structure of the connecting seat of the present invention;

[0024] Figure 7 for the present invention Figure 6 is an enlarged view at B in the present invention;

[0025] Figure 8 is a schematic diagram of the structure of the switching limiting mechanism of the present invention;

[0026] Figure 9 is a schematic diagram of the ratchet and ratchet tooth structure of the present invention;

[0027] Figure 10 is a schematic diagram of the inner side structure of the vertical seat of the present invention;

[0028] Figure 11 is a cross-sectional view of the connecting shaft of the present invention;

[0029] Figure 12Schematic diagram of the first straight rack, the second spur gear and the fourth straight rack of the present invention.

[0030] In the figure: 1, workbench; 2, mounting seat; 3, support seat; 4, hydraulic cylinder; 5, connecting rod; 6, bending plate; 7, vertical seat; 8, driving motor; 9, steel bar; 10, pressing head; 11, first power ring; 12, roller; 13, connecting seat; 14, connecting shaft; 15, fixed rod; 16, moving rod; 17, fixed ring; 18, connecting spring; 19, first spherical rod; 20, inclined surface; 21, second power ring; 22, sliding rod; 23, first inclined surface; 24, first track; 25, second spherical rod; 26, first straight rack; 27, power spring; 28, pressing plate; 29, bolt; 30, rotating shaft; 31, power rod; 32, ratchet teeth; 33, ratchet wheel; 34, second straight rack; 35, third straight rack; 36, first spur gear; 37, first rotating shaft; 38, inclined rod; 39, connecting column; 40, inclined groove; 41, torsion spring; 42, second track; 43, second rotating shaft; 44, fixed sleeve; 45, auxiliary spring; 46, connecting disc; 47, fourth straight rack; 48, connecting plate; 49, second spur gear. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "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 invention 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, and thus cannot be construed as a limitation on the present invention. 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 invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "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 invention can be understood according to specific circumstances. The embodiments of the present invention will be described below according to its overall structure.

[0033] Please refer to Figures 1 to 12 , this embodiment provides a steel bar quality detector for construction engineering, including: a workbench 1 and a mounting base 2 fixedly connected to the top of the workbench 1. A support base 3 is fixedly connected to the top of the mounting base 2. A hydraulic cylinder 4 is installed at the bottom of the support base 3. The output end of the hydraulic cylinder 4 is connected to a connecting rod 5. A pressing head 10 is installed at the bottom of the connecting rod 5; a steel bar 9, the steel bar 9 is arranged above the mounting base 2, and it also includes a bending limiter. The bending limiter includes two connecting seats 13 arranged above the mounting base 2. A bending plate 6 is arranged on the inner side of each of the two connecting seats 13. A pressing plate 28 is fixedly connected to the inner side of the bending plate 6 by bolts 29, and the pressing plate 28 presses against the outer wall of the steel bar 9. A limiting component for unidirectionally limiting the bending plate 6 is arranged between the connecting seat 13 and the bending plate 6. The limiting component includes rotating shafts 30 fixedly connected to both ends of the bending plate 6, and one end of each of the two rotating shafts 30 penetrates to the outside of the connecting seat 13 and is rotatably connected to the connecting seat 13. A ratchet 33 is fixedly connected to the outer wall of each of the two rotating shafts 30. Two power rods 31 are slidably connected to the inner side of the connecting seat 13. One end of each of the two power rods 31 penetrates to the outside of the connecting seat 13 and is slidably connected to the connecting seat 13. One end of the power rod 31 is rotatably connected to a second rotating shaft 43. A ratchet tooth 32 is fixedly connected to the outer wall of the second rotating shaft 43. A torsion spring 41 is installed between the ratchet tooth 32 and the power rod 31. The ratchet tooth 32 is meshed with the ratchet 33. The helical tooth directions on the outer walls of the two ratchets 33 are opposite, and initially, one of the ratchet teeth 32 is not meshed with the ratchet tooth 32;

[0034] First, when quality inspection of the steel bar 9 is required, the steel bar 9 can be placed between the two bending plates 6. Subsequently, the pressing plate 28 is pressed against the outer wall of the steel bar 9, and then the pressing plate 28 is fixed to the bending plate 6 through the bolt 29. Then, the output end of the hydraulic cylinder 4 drives the connecting rod 5 to drive the pressing head 10 to move downward to perform a pressing and bending inspection operation on the middle part of the steel bar 9. When the steel bar 9 is bent, it can drive the two bending plates 6 to rotate towards each other, thereby limiting the bending inspection of the steel bar 9. Through the rotation of the bending plates 6 towards each other, the bending deformation trend of the steel bar 9 can be closely adhered to in real time, and the stable clamping of both ends of the steel bar 9 is maintained during the bending process, avoiding the detection failure caused by the springback of the steel bar 9, and thus improving the detection accuracy;

[0035] When the bending plate 6 rotates clockwise, it can drive the ratchet 33 in the clockwise direction to rotate, thereby driving the ratchet tooth 32 to rotate. When the ratchet tooth 32 is engaged with the ratchet teeth of the ratchet 33 under the action of the torsion spring 41, the ratchet 33 is limited, and further, the clockwise rotation of the bending plate 6 can be unidirectionally limited. When the steel bar 9 undergoes plastic deformation under pressure, the bending plate 6 can rotate along the deformation direction, but the ratchet tooth 32 will be stuck in the ratchet 33 to prevent reverse rotation, thereby stably maintaining the steel bar 9 in the bent state, thus improving the stability of the device during detection.

[0036] Please refer to Figures 2 to 12, a conversion auxiliary part is located between the mounting seat 2 and the connecting seat 13, and a switching limit mechanism for cooperating with the operation of the conversion auxiliary part is provided between the connecting seat 13 and the bending plate 6. The conversion auxiliary part includes two stands 7 fixedly connected to the top of the mounting seat 2, and a driving motor 8 is installed on one side of the two stands 7. The output end of the driving motor 8 is connected to a connecting shaft 14, and one end of the connecting shaft 14 passes through the inner side of the stand 7 and is rotatably connected to the stand 7. A connecting disk 46 is provided at the end of the connecting shaft 14, and one end of the connecting disk 46 is fixedly connected to a fixing rod 15, and the fixing rod 15 is fixedly connected to the connecting seat 13. The ends of the two bending plates 6 are rotatably connected to a roller 12, and the conversion auxiliary part also includes a sliding connection at the connecting The first straight rack 26 on the inner side of the shaft 14, the back side of the first straight rack 26 is fixedly connected to a connecting plate 48, a power spring 27 is installed between the connecting plate 48 and the connecting shaft 14, the bottom of the first straight rack 26 is fixedly connected to the second spherical rod 25, the top of the mounting seat 2 is fixedly connected to the first power ring 11, the inner side of the first power ring 11 is respectively provided with a first inclined surface 23, a first track 24 and a second track 42, the second spherical rod 25 initially rests on the second track 42, the inner side of the connecting shaft 14 is slidably connected to the fourth straight rack 47, the inner side of the connecting shaft 14 is rotatably connected to the second spur gear 49, and the first straight rack 26, the fourth straight rack 47 are meshed with the second spur gear 49, and the fourth straight rack 47 is connected to the connecting shaft The disk 46 is fixedly connected, and the switching limit mechanism includes a first rotating shaft 37 rotatably connected to the inner side of the connecting seat 13, and the outer wall of the first rotating shaft 37 is fixedly connected to the first spur gear 36. One end of the two power rods 31 is respectively fixedly connected to the second spur rack 34 and the third spur rack 35, and the second spur rack 34 and the third spur rack 35 are both engaged with the first spur gear 36. The switching limit mechanism also includes a fixed ring 17 fixedly connected to the outer wall of the fixed rod 15, and the inner side of the fixed ring 17 is slidably connected to the moving rod 16. One end of the moving rod 16 is fixedly connected to the oblique rod 38, and the inner side of the oblique rod 38 is provided with an oblique groove 40. The bottom of the second spur rack 34 is fixedly connected to the connecting column 39, and the diameter of the connecting column 39 matches the oblique groove 40. , the connecting column 39 is inserted into the inner side of the inclined groove 40, and a toggle assembly is provided between the top of the mounting seat 2 and the end of the moving rod 16. The toggle assembly includes a fixed sleeve 44 fixedly connected to the top of the mounting seat 2, and the inner side of the fixed sleeve 44 is slidably connected to the sliding rod 22. An auxiliary spring 45 is installed between the bottom of the sliding rod 22 and the fixed sleeve 44. The top of the sliding rod 22 is fixedly connected to the second power ring 21, and the second power ring 21 is rotatably connected to the end of the connecting disk 46. The end of the second power ring 21 is provided with an inclined surface 20. The end of the moving rod 16 is fixedly connected to the first spherical rod 19, and the first spherical rod 19 is initially fitted on the inclined surface 20. A connecting spring 18 is installed between the moving rod 16 and the fixed ring 17;

[0037] A notch is provided at the top of the first power ring 11. When the steel bar 9 needs to be reversely bent and detected again after the forward bending detection, two driving motors 8 can be started. The output end of the driving motor 8 drives the connecting shaft 14 to drive the connecting seat 13 to rotate through the fixed rod 15, so that the two bending plates 6 are flipped 180 degrees, making the steel bar 9 that has been bent once face downward. When the connecting shaft 14 rotates, it drives the second spherical rod 25 to rotate. When the second spherical rod 25 moves along the second track 42 towards the first inclined surface 23, it can push the second spherical rod 25 to drive the connecting disk 46 to move upward through the first straight rack 26, and then drive the fourth straight rack 47 to drive the connecting disk 46 to move downward through the second spur gear 49, thereby reducing the rotation radius of the bending plate 6. When the bending plate 6 rotates 180 degrees, the second spherical rod 25 rotates to the notch of the first power ring 11, so that the power spring 27 drives the first straight rack 26 to reset, and then drives the fourth straight rack 47 to drive the flipped bending plate 6 to move downward, so that the roller 12 at the end of the bending plate 6 abuts against the inner top of the mounting seat 2. At this time, the power spring 27 is still in a compressed state, so that the bending plate 6 flipped 180 degrees can support on the ground. Furthermore, when the steel bar 9 is reversely squeezed and detected, the two bending plates 6 can provide good support along with the reset of the power spring 27 during the reverse bending process with a large radian of the steel bar 9. At the beginning of the reverse bending detection of the steel bar 9, since the steel bar 9 has completed the forward bending, there may be a large initial bending angle. At this time, the bending plate 6 abuts against the inner top of the mounting seat 2, which can provide a stable starting support point for the entire detection device. In this way, it can be ensured that at the beginning stage of the reverse bending, the position and posture of the steel bar 9 are relatively stable, avoiding inaccurate detection data caused by initial instability and improving the reliability of the detection results;

[0038] When the steel bar 9 is reversely bent to 30 degrees and continues to be bent, the bending plate 6 will continue to rotate reversely and separate from the mounting seat 2 and be in a suspended state;

[0039] When the bending plate 6 rotates 180 degrees downward from the front, the first spherical rod 19 moves along the inclined surface 20 towards the end of the second power ring 21, thereby driving the first spherical rod 19 to drive the moving rod 16 to move towards the connecting column 39. Then, under the action of the inclined groove 40, the connecting column 39 is pushed to drive the second straight rack 34 to move towards the first straight gear 36, causing one ratchet tooth 32 to gradually separate from the corresponding ratchet wheel 33. The third straight rack 35 drives the other ratchet tooth 32 to move towards the ratchet wheel 33, so that the other ratchet tooth 32 meshes with the ratchet wheel 33. Since the helical teeth on the outer walls of the two ratchet wheels 33 are arranged in opposite directions, the ratchet wheel 33 and the ratchet tooth 32 during the forward rotation of the original bending plate 6 are no longer meshed. When the bending plate 6 is reset to the horizontal position, it is limited by the other ratchet wheel 33 and ratchet tooth 32. When the bending plate 6 that rotates downward gradually rotates to the horizontal state, the other ratchet wheel 33 and ratchet tooth 32 can perform one-way limiting on it, enabling the bending plate 6 to achieve effective one-way limiting in bending detection in different directions, thereby further improving the detection accuracy of the device.

[0040] The above-mentioned is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A steel bar quality detector for construction projects, characterized in that Including: A workbench (1) and a mounting seat (2) fixedly connected to the top of the workbench (1). A support seat (3) is fixedly connected to the top of the mounting seat (2). A hydraulic cylinder (4) is installed at the bottom of the support seat (3). The output end of the hydraulic cylinder (4) is connected to a connecting rod (5), and a pressing head (10) is installed at the bottom of the connecting rod (5); A steel bar (9), the steel bar (9) is arranged above the mounting seat (2), and further includes a bending limiter. The bending limiter includes two connecting seats (13) arranged above the mounting seat (2). A bending plate (6) is arranged on the inner side of each of the two connecting seats (13). A pressing plate (28) is fixedly connected to the inner side of the bending plate (6) by bolts (29), and the pressing plate (28) presses against the outer wall of the steel bar (9). A limiting component for unidirectionally limiting the bending plate (6) is arranged between the connecting seat (13) and the bending plate (6); A conversion auxiliary part, located between the mounting seat (2) and the connecting seat (13). A switching limiting mechanism for cooperating with the operation of the conversion auxiliary part is arranged between the connecting seat (13) and the bending plate (6); The limiting component includes rotating shafts (30) fixedly connected to both ends of the bending plate (6). One end of each of the two rotating shafts (30) penetrates to the outside of the connecting seat (13) and is rotatably connected to the connecting seat (13). A ratchet wheel (33) is fixedly connected to the outer wall of each of the two rotating shafts (30). Two power rods (31) are slidably connected to the inner side of the connecting seat (13). One end of each of the two power rods (31) penetrates to the outside of the connecting seat (13) and is slidably connected to the connecting seat (13). One end of the power rod (31) is rotatably connected to a second rotating shaft (43). A ratchet tooth (32) is fixedly connected to the outer wall of the second rotating shaft (43). A torsion spring (41) is installed between the ratchet tooth (32) and the power rod (31). The ratchet tooth (32) is meshed with the ratchet wheel (33); The conversion auxiliary part includes two vertical seats (7) fixedly connected to the top of the mounting seat (2). A driving motor (8) is installed on one side of each of the two vertical seats (7). The output end of the driving motor (8) is connected to a connecting shaft (14). One end of the connecting shaft (14) penetrates to the inside of the vertical seat (7) and is rotatably connected to the vertical seat (7). A connecting disc (46) is arranged at the end of the connecting shaft (14). A fixing rod (15) is fixedly connected to one end of the connecting disc (46), and the fixing rod (15) is fixedly connected to the connecting seat (13). A roller (12) is rotatably connected to the end of each of the two bending plates (6); The conversion auxiliary component also includes a first straight rack (26) slidably connected to the inner side of the connecting shaft (14), a connecting plate (48) is fixedly connected to the back of the first straight rack (26), a power spring (27) is installed between the connecting plate (48) and the connecting shaft (14), a second spherical rod (25) is fixedly connected to the bottom of the first straight rack (26), a first power ring (11) is fixedly connected to the top of the mounting seat (2), and a first power ring (11) is respectively provided on the inner side of the first power ring (11). An inclined surface (23), a first track (24) and a second track (42), the second spherical rod (25) initially abuts against the second track (42), the inner side of the connecting shaft (14) is slidably connected to a fourth spur rack (47), the inner side of the connecting shaft (14) is rotatably connected to a second spur gear (49), the first spur rack (26), the fourth spur rack (47) and the second spur gear (49) are meshed, and the fourth spur rack (47) is fixedly connected to the connecting disk (46); The switching limit mechanism includes a first rotating shaft (37) rotatably connected to the inner side of the connecting seat (13), the outer wall of the first rotating shaft (37) is fixedly connected to a first spur gear (36), one end of the two power rods (31) is respectively fixedly connected to a second spur rack (34) and a third spur rack (35), and the second spur rack (34) and the third spur rack (35) are both engaged with the first spur gear (36); The switching limit mechanism also includes a fixed ring (17) fixedly connected to the outer wall of the fixed rod (15), the inner side of the fixed ring (17) is slidably connected to the moving rod (16), one end of the moving rod (16) is fixedly connected to an inclined rod (38), the inner side of the inclined rod (38) is provided with an inclined groove (40), the bottom of the second straight rack (34) is fixedly connected to a connecting column (39), and the diameter of the connecting column (39) matches the inclined groove (40), the connecting column (39) is inserted into the inner side of the inclined groove (40), and a toggle assembly is provided between the top of the mounting seat (2) and the end of the moving rod (16); The toggle assembly includes a fixed sleeve (44) fixedly connected to the top of the mounting seat (2), a sliding rod (22) is slidably connected to the inner side of the fixed sleeve (44), an auxiliary spring (45) is installed between the bottom of the sliding rod (22) and the fixed sleeve (44), a second power ring (21) is fixedly connected to the top of the sliding rod (22), and the second power ring (21) is rotatably connected to the end of the connecting disk (46), the end of the second power ring (21) is provided with an inclined surface (20), the end of the moving rod (16) is fixedly connected to the first spherical rod (19), and the first spherical rod (19) is initially attached to the inclined surface (20), and a connecting spring (18) is installed between the moving rod (16) and the fixed ring (17).

2. The quality detector for steel bars in construction engineering according to claim 1, wherein, The helical tooth directions on the outer walls of the two ratchets (33) are arranged in opposite directions, and initially, one of the ratchet teeth (32) is not engaged with the ratchet teeth (32).

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