Building steel bar performance detection device and detection method

Abstract

The application provides a building steel bar performance detection device and detection method, and relates to the field of steel bar detection. It comprises a detection table, a hydraulic cylinder and two clamps arranged on the detection table. The clamp comprises a plurality of clamping mechanisms arranged at intervals, and the two ends of the steel bar to be detected are clamped by the clamping mechanisms. The top of the detection table is provided with two limiting grooves, and the two clamps are respectively and one-to-one arranged in the two limiting grooves. The hydraulic cylinder is connected with one of the clamps through a connecting plate and pushes the clamp to move in the limiting groove along the axial direction of the steel bar to be detected, and the other clamp is clamped in the limiting groove. The clamping mechanism comprises a pair of clamping plates, and one side of the pair of clamping plates opposite to each other is provided with a groove, and the end of the steel bar to be detected is arranged between the pair of grooves. The application has the effect of quickly and accurately detecting the steel bar to be detected on the construction site.

Description

Technical Field

[0001] This application relates to the field of steel reinforcement testing, and in particular to devices for testing the performance of building steel reinforcement, as well as methods for testing the performance of building steel reinforcement. Background Technology

[0002] Reinforcing bars are mainly used in the casting of columns or walls during building construction. They mainly play a role in resisting tension and compression, improving the ductility of structural component joints in buildings, and enhancing the earthquake resistance of buildings. Therefore, the quality requirements for reinforcing bars are high, and thus, multiple reinforcing bars need to be tested before construction.

[0003] Currently, the testing of reinforcing bars mainly focuses on mechanical properties, such as tensile strength. Before testing, the reinforcing bars transported to the construction site need to be cut and sampled, and then sent to a professional testing institution for testing using a universal testing machine.

[0004] However, sending samples to testing institutions and waiting and testing at those institutions takes a lot of time, which will affect the construction progress. Purchasing a dedicated universal testing machine would increase the project cost. Summary of the Invention

[0005] To address the low testing efficiency of testing reinforcing steel bars in construction by sending them for inspection, this application provides a testing device and method for testing the performance of reinforcing steel bars.

[0006] Firstly, this application provides a device for testing the performance of reinforcing steel bars in construction, employing the following technical solution: The device for testing the performance of reinforcing steel bars includes a testing platform, a hydraulic cylinder mounted on the testing platform, and two clamps. Each clamp includes several spaced-apart clamping mechanisms, and both ends of the reinforcing steel bar to be tested are clamped by these clamping mechanisms. The top of the testing platform is provided with two limiting grooves, and the two clamps are respectively and correspondingly located in the two limiting grooves. The hydraulic cylinder is connected to one of the clamps via a connecting plate and pushes the clamp to move along the axial direction of the reinforcing steel bar to be tested within the limiting groove, while the other clamp is locked within the limiting groove.

[0007] By adopting the above technical solution, both ends of the reinforcing bar to be inspected can be clamped by multiple clamping mechanisms, ensuring that there is no mutual movement between the reinforcing bar and the clamps. Then, the positions of the two clamps in the limiting grooves are adjusted so that one clamp can be connected to the hydraulic cylinder through the connecting plate and slides along the axial direction of the reinforcing bar in one limiting groove under the push of the hydraulic cylinder, while the other clamp is locked in the other limiting groove. In this way, by controlling the hydraulic cylinder to output a preset thrust, the distance between the two clamps will increase under the push of the hydraulic cylinder, causing the reinforcing bar to be stretched. If the reinforcing bar is not broken or stretched beyond its original length under the push of the preset thrust, the inspection will be successful. If the test result is within the standard range, it indicates that the reinforcing bar under test meets the requirements. If the reinforcing bar under test breaks under the preset thrust or before the thrust output by the hydraulic cylinder reaches the preset thrust, it indicates that the reinforcing bar under test is unqualified. In other words, after the reinforcing bar under test is reliably clamped by two clamps, a preset thrust is applied to the reinforcing bar under test by the hydraulic cylinder, and then the state of the reinforcing bar under test is observed to see if it is consistent with the standard state. This can quickly achieve the purpose of testing. The overall structure of the testing device is ingenious and the manufacturing cost is low. It can be assembled and used on the construction site, so there is no need to send the reinforcing bar under test for testing, which greatly improves the testing efficiency.

[0008] Optionally, the clamping mechanism includes a pair of clamping plates, each with a groove on one side opposite to the other, and the end of the reinforcing bar to be inspected passes between the two grooves; the clamp also includes a pressure plate and locking bolts, the pressure plate covers the top of the clamping mechanism, and the two locking bolts are screwed onto both ends of the pressure plate and screwed into the top of the inspection table.

[0009] By adopting the above technical solution, after the two clamping plates of a clamping mechanism are closed, the two grooves on the two clamping plates can form a through hole, and the end of the reinforcing bar to be inspected is inserted into this through hole. Since a fixture includes multiple clamping mechanisms, multiple through holes can be formed for the end of the reinforcing bar to be inspected to pass through. In this way, after pressing and locking multiple clamping mechanisms by one or more pressure plates and a corresponding number of locking bolts, the two clamping plates of any clamping mechanism are in a reliably locked state, thereby ensuring that the end of the reinforcing bar to be inspected does not move relative to the fixture, and thus ensuring that the thrust output by the hydraulic cylinder is used entirely for the stretching of the reinforcing bar to be inspected, resulting in more accurate test results.

[0010] Optionally, the top of the testing platform is provided with several threaded holes, one end of the locking bolt covers the top of the pressure plate, and the other end of the locking bolt is adapted to be screwed into the threaded hole.

[0011] By adopting the above technical solution, after the two clamping plates of a clamping mechanism are aligned and fitted together, the pressure plate is placed on top of the fixture (i.e., on top of the upper clamping plate of multiple clamping mechanisms). Then, the other end of the locking bolt is passed through the pressure plate and screwed into the threaded hole of the testing table. As the locking bolt is continuously screwed in, the downward pressure of the pressure plate on the fixture gradually increases. In this way, it can effectively prevent the end of the reinforcing bar to be inspected from moving relative to the clamping mechanism after the hydraulic cylinder applies a thrust.

[0012] Optionally, the clamping plate has two through holes located on both sides of the groove. A rubber sleeve and a threaded sleeve are inserted into the through holes. The rubber sleeve is fixed between the outer wall of the threaded sleeve and the inner wall of the through hole. An adjusting screw is provided between two adjacent clamping plates in the horizontal direction. The two ends of the adjusting screw are respectively adapted to be screwed into two adjacent threaded sleeves. The threads at the two ends of the adjusting screw have opposite directions. An adjusting knob is provided in the middle of the adjusting screw.

[0013] By adopting the above technical solution, the length of the adjusting screw inside the threaded sleeve will change after the adjusting knob is rotated. In this way, the distance between two adjacent clamping plates located on the same horizontal plane can be adjusted. When the amount of rotation of the adjusting knob between two adjacent clamping mechanisms is the same, the distance between the two adjacent clamping mechanisms can be adjusted. When the amount of rotation of the adjusting knob between two adjacent clamping mechanisms is different, the distance and angle between the two adjacent clamping mechanisms can be adjusted. In this case, the angle between the adjusting screw and the clamping plate will also change, thereby forming a squeezing effect on the corresponding rubber sleeve. That is to say, through the slight deformation of the rubber sleeve, the placement angle of the threaded sleeve in the perforation can be deflected, avoiding deformation of the adjusting screw when adjusting the angle of the two adjacent clamping mechanisms.

[0014] Optionally, the testing station is provided with two slots, which are respectively connected to the side walls of the two limiting grooves. The side walls of the limiting grooves are perpendicular to the reinforcing bar to be inspected and face away from the extension direction of the reinforcing bar. The bottom of the fixture is provided with a pair of L-shaped limiting blocks symmetrically. The horizontal end of one limiting block is inserted into the slot, and the horizontal end of the other limiting block is in contact with the bottom of the limiting groove. The opening of the limiting groove is provided with a cover plate, and the bottom of the cover plate covers the top of the horizontal end of the other limiting block.

[0015] By adopting the above technical solution, each fixture has a pair of L-shaped limiting blocks symmetrically arranged at its bottom. The vertical end of the limiting block is connected to the bottom of the fixture, and the horizontal end of the limiting block is flush with the bottom of the limiting groove. Specifically, the two limiting blocks are respectively located at the bottom of the two outermost clamping plates located below. The fixture and the pair of limiting blocks form a whole. When the fixture and the pair of limiting blocks slide in the limiting groove along the extension direction of the hydraulic cylinder push rod, the horizontal end of one limiting block at the bottom of the fixture will be inserted into the slot, and the horizontal end of the other limiting block at the bottom of the fixture will remain in contact with the bottom of the limiting groove. Then, the cover plate is pressed on the opening of the limiting groove, and the horizontal end of the other limiting block at the top of the fixture will be covered by the bottom of the cover plate. In this way, one limiting block is inserted into the slot, and the other limiting block is covered by the bottom of the cover plate, so that the fixture can only slide in the limiting groove and cannot rotate or move to the outside of the limiting groove, which improves the stability of the fixture during the detection process and thus improves the accuracy of the detection results.

[0016] Optionally, the upper part of the cover plate presses onto the top of the testing station, and the cover plate is detachably connected to the testing station.

[0017] By adopting the above technical solution, after the cover plate is fixed on the testing table, the limiting block at the bottom of the fixture is reliably pressed into the limiting groove, thereby realizing the rapid limiting of the fixture.

[0018] Optionally, the end face of the clamp close to and connected to the hydraulic cylinder is flush with the vertical end face of the corresponding limiting block, and the vertical end face of the limiting block is far away from the side wall of the corresponding limiting groove; the end face of the clamp far away from the hydraulic cylinder and not connected to the hydraulic cylinder is flush with the vertical end face of the corresponding limiting block, and the vertical end face of the limiting block is in contact with the side wall of the corresponding limiting groove.

[0019] By adopting the above technical solution, when a limiting block of one clamp is fully inserted into the slot, the side wall of the vertical end of the limiting block fits against the side wall of the limiting groove. In this way, the clamp is in a fixed position. That is, after the hydraulic cylinder applies a pushing force to the reinforcing bar to be inspected, the clamp will not displace and can reliably clamp the end of the reinforcing bar to be inspected. At this time, a limiting block of another clamp is not fully inserted into the limiting groove. Thus, after the hydraulic cylinder applies a pushing force to the reinforcing bar to be inspected, the clamp will drive the end of the reinforcing bar to be inspected to produce a certain amount of displacement, thereby achieving the tensile effect on the reinforcing bar to be inspected. Since the pushing force applied by the hydraulic cylinder is within the preset range, the tensile strength of the reinforcing bar to be inspected can be determined by comparing and observing the state of the reinforcing bar to be inspected. The detection speed is fast, the detection results are accurate, and the manufacturing and use costs of the detection device are low. It can be directly assembled and tested on the construction site.

[0020] Optionally, the top two ends of the pressure plate away from the hydraulic cylinder are provided with several adjustment holes. The adjustment holes are arranged at intervals along a straight line at the end of the pressure plate. The pressure plate is also provided with two locking bolts. The two locking bolts are screwed into one of the adjustment holes at both ends of the pressure plate, and the outer walls of the two locking bolts are respectively attached to the two side walls of the clamp.

[0021] By adopting the above technical solution, after adjusting the distance and angle between multiple clamping mechanisms, locking bolts can be screwed into the pressure plate to achieve vertical locking of multiple clamping mechanisms. Then, an adjustment hole at a suitable position is selected and a locking bolt is screwed into the adjustment hole. The clamping action of the fixture is achieved by the two locking bolts at both ends of the pressure plate, preventing the distance between multiple clamping mechanisms from changing after the hydraulic cylinder applies a thrust to the steel bar to be inspected. In other words, under the action of the two locking bolts, the horizontal locking action of multiple clamping mechanisms can be achieved, ultimately ensuring that the thrust output by the hydraulic cylinder can fully act on the tensile strength of the steel bar to be inspected, thus improving the accuracy of the test results.

[0022] Optionally, a retaining strip is provided in the groove, and the retaining strip abuts against the outer wall of the reinforcing bar to be inspected.

[0023] By adopting the above technical solution, the clamping strip can improve the locking force of the reinforcing bar to be inspected. Furthermore, when the reinforcing bar to be inspected is a threaded steel bar, by adjusting the angle of the clamping mechanism, the clamping strip can be made parallel to the thread on the outer wall of the reinforcing bar to be inspected. Then, by adjusting the position of the clamping mechanism, the clamping strip can be made to fit with the thread on the outer wall of the reinforcing bar to be inspected. In this way, through the interaction between the clamping strip and the thread on the outer wall of the reinforcing bar to be inspected, the clamping effect of the reinforcing bar to be inspected in the fixture can be significantly improved.

[0024] Secondly, this application provides a method for testing the performance of building steel reinforcement, which adopts the following technical solution: The method for testing the performance of building steel reinforcement includes the following steps: S1. Cut a suitable length of the reinforcing bar to be inspected, loosen the locking bolts, and insert both ends of the reinforcing bar into the two clamps respectively; S2. Rotate the adjustment knob to adjust the distance and angle between two adjacent clamping mechanisms; S3. Push the clamp that is away from the hydraulic cylinder and not connected to the hydraulic cylinder toward the extension direction of the hydraulic cylinder push rod. When the limiting block at the bottom of the clamp is inserted into the slot and the vertical end face of the limiting block is in contact with the side wall of the limiting slot, lock the corresponding cover plate and pressure plate. S4. Push the clamp that is close to and connected to the hydraulic cylinder toward the retraction direction of the push rod of the hydraulic cylinder. When the limiting block at the bottom of the clamp is inserted into the slot and the vertical end face of the limiting block is far away from the side wall of the limiting slot, lock the corresponding cover plate and pressure plate. S5. Screw the two locking bolts into the two adjusting holes at both ends of the pressure plate respectively and in a one-to-one correspondence, so that the outer wall of the locking bolt is in contact with the side wall of the clamp. S6. The hydraulic cylinder outputs a preset thrust, which pushes the clamp connected to the hydraulic cylinder through the connecting plate to produce displacement. The state of the steel bar to be inspected is observed and compared with the standard state. The inspection is then completed.

[0025] By adopting the above technical solution, both ends of the reinforcing bar to be inspected can be fixed in two clamps respectively. When the hydraulic cylinder is connected to one clamp and drives the clamp to move in a limiting groove, the reinforcing bar to be inspected can be stretched as the distance between the two clamps increases because the other clamp is stuck in another limiting groove. The thrust output by the hydraulic cylinder is always kept within a preset range. Within this preset range, qualified reinforcing bars will not break or have other unqualified phenomena. In this way, after the thrust output by the hydraulic cylinder reaches the preset value, the reinforcing bar to be inspected can be observed and compared to determine whether the reinforcing bar meets the standard. The detection device is compact, has low manufacturing cost, high detection efficiency, and accurate detection results.

[0026] In summary, this application has the following beneficial effects: 1. A fixture includes multiple clamping mechanisms. The multiple clamping mechanisms of two fixtures form a reliable clamping effect on the reinforcing bar to be inspected under the pressure of the pressure plate. Then, a hydraulic cylinder outputs a preset thrust to one fixture and forms a tensile effect on the reinforcing bar to be inspected. After the thrust output by the hydraulic cylinder reaches the preset value, the reinforcing bar to be inspected can be observed and compared. It can quickly detect whether the reinforcing bar to be inspected meets the standards. It has a compact structure and high detection efficiency.

[0027] 2. By opening through holes on both sides of the groove of the clamping plate and installing rubber sleeves and threaded sleeves in the through holes, the distance and angle between two adjacent clamping mechanisms can be adjusted by rotating the adjusting screw screw screwed in the threaded sleeve. This can significantly improve the clamping effect of the steel bars to be inspected and ensure the accuracy of the measurement results. Attached Figure Description

[0028] Figure 1 This is a schematic perspective view of this application; Figure 2 This is a cross-sectional view of the internal structure of this application; Figure 3 It is a schematic 3D diagram of the fixture; Figure 4 This is a schematic 3D diagram of the clamping mechanism; Figure 5 This is a reference diagram showing the assembly state of the fixture and pressure plate; In the diagram: 1. Testing platform; 11. Limiting groove; 12. Threaded hole; 13. Slot; 2. Hydraulic cylinder; 20. Connecting plate; 3. Fixture; 31. Clamping mechanism; 311. Clamping plate; 3111. Groove; 3112. Through hole; 3113. Rubber sleeve; 3114. Threaded sleeve; 3115. Locking strip; 32. Pressure plate; 320. Adjusting hole; 33. Locking bolt; 34. Adjusting screw; 340. Adjusting knob; 35. Limit block; 36. Locking bolt; 4. Reinforcing bars to be inspected; 5. Cover plate. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0030] This embodiment discloses a device for testing the performance of building steel reinforcement.

[0031] Figure 1 This is a schematic perspective view of this application. Figure 2 This is a cross-sectional view of the internal structure of this application. See also: Figure 1 and Figure 2 The testing device for the performance of reinforcing steel bars includes a testing platform 1, clamps 3, and a hydraulic cylinder 2. The top of the testing platform 1 is provided with two limiting grooves 11, each containing a clamp 3. The two ends of the reinforcing steel bar 4 to be tested are clamped and fixed by the two clamps 3. One clamp 3 is connected to the hydraulic cylinder 2 through a connecting plate 20 and can slide within one limiting groove 11. The other clamp 3 is locked within the other limiting groove 11. The hydraulic cylinder 2 outputs a preset thrust and pushes one clamp 3 to slide within the limiting groove 11, thereby increasing the distance between the two clamps 3 and achieving a tensile effect on the reinforcing steel bar 4 to be tested. When the thrust output by the hydraulic cylinder 2 reaches the preset value, if the reinforcing steel bar 4 to be tested does not break, it is determined that the tensile strength of the reinforcing steel bar 4 to be tested meets the standard. The test results are accurate and the testing efficiency is high. Moreover, the structure of the testing device is simple and ingenious, with low manufacturing cost. It can be quickly assembled and tested on the construction site, avoiding the impact on the construction progress caused by sending the reinforcing steel bar 4 to be tested for testing.

[0032] See Figure 2A slot 13 is provided on the side wall of the limiting groove 11. The slot 13 is located on the side wall of the limiting groove 11, facing away from the extension direction of the hydraulic cylinder 2 push rod and perpendicular to the axis of the reinforcing bar 4 to be inspected. The bottom of the slot 13 is flush with and connected to the bottom of the limiting groove 11. A pair of L-shaped limiting blocks 35 are symmetrically provided on the bottom of the clamp 3 (one limiting block 35 is located on the bottom of the clamping plate 311 closest to the slot 13 and located below it, and the other limiting block 35 is located on the bottom of the clamping plate 311 furthest from the slot 13 and located below it). The vertical end of the limiting block 35 is fixedly connected to the bottom of the clamp 3. The bottom of the horizontal end of the 35 is in contact with the bottom of the limiting groove 11. The horizontal end of one limiting block 35 is inserted into the slot 13. The horizontal end of the other limiting block 35 is pressed by the cover plate 5 which is detachably set on the detection table 1. One limiting block 35 at the bottom of the clamp 3 connected to the hydraulic cylinder 2 is not fully inserted into the slot 13 (that is, there is a distance between the vertical end sidewall of the limiting block 35 and the sidewall of the limiting groove 11), while the one limiting block 35 at the bottom of the clamp 3 not connected to the hydraulic cylinder 2 is fully inserted into the slot 13 (that is, the vertical end sidewall of the limiting block 35 is in contact with the sidewall of the limiting groove 11).

[0033] The clamp 3 not connected to the hydraulic cylinder 2 is reliably confined within the corresponding limiting groove 11, while the clamp 3 connected to the hydraulic cylinder 2 can slide within the limiting groove 11 under the push of the hydraulic cylinder 2 until the limiting block 35 of the clamp 3 is fully inserted into the slot 13. During the displacement of the clamp 3 connected to the hydraulic cylinder 2, the distance between the two clamps 3 increases, achieving the stretching effect on the reinforcing bar 4 to be inspected. After the reinforcing bar 4 to be inspected is stretched, its tensile strength can be determined by comparing it with the standard state of the reinforcing bar 4 to be inspected. Through the cooperation of the slot 13 and the limiting block 35, and the cooperation of the cover plate 5 and the other slot 13, the clamp 3 can be quickly and reliably limited, ensuring that the two clamps 3 cannot make vertical displacement during the stretching process of the reinforcing bar 4 to be inspected by the hydraulic cylinder 2. This also prevents the thrust of the hydraulic cylinder 2 on the reinforcing bar 4 to be inspected from being radially offset, ensuring the accuracy of the test results.

[0034] Figure 3 It is a schematic 3D diagram of the fixture. Figure 4 This is a schematic 3D diagram of the clamping mechanism. See also... Figure 3 and Figure 4The fixture 3 includes several clamping mechanisms 31 arranged at intervals. Each clamping mechanism 31 includes two clamping plates 311. Each clamping plate 311 has a groove 3111 on one side opposite to the other. The groove 3111 contains a retaining strip 3115. When the two clamping plates 311 in a clamping mechanism 31 are closed together, the two grooves 3111 form a through hole. The reinforcing bar 4 to be inspected passes through the through hole and is secured by the two retaining strips 3115 in the through hole. At least one pressure plate 32 is provided on the top of the fixture 3. Locking bolts 33 are passed through both ends of the pressure plate 32. One end of the locking bolt 33 presses against the top of the pressure plate 32, and the other end of the locking bolt 33 is screwed into the threaded hole 12 of the inspection table 1. By continuously screwing the locking bolt 33 into the threaded hole 12, the pressure plate 32 can reliably press multiple pairs of clamping plates 311, thus achieving the clamping effect of multiple clamping mechanisms 31 and ensuring that the reinforcing bar 4 to be inspected can be limited in the through hole.

[0035] A pair of through holes 3112 are symmetrically provided on the end face of the clamping plate 311 and on both sides of the groove 3111. A rubber sleeve 3113 and a threaded sleeve 3114 are provided inside the through holes 3112. The outer wall of the rubber sleeve 3113 is fixedly connected to the inner wall of the through hole 3112, and the inner wall of the rubber sleeve 3113 is fixedly connected to the outer wall of the threaded sleeve 3114. An adjusting screw 34 is provided between two adjacent clamping plates 311 on the same horizontal plane. The two ends of the adjusting screw 34 are respectively screwed into the corresponding two threaded sleeves 3114, with the threads at both ends of the adjusting screw 34 rotating in opposite directions. An adjusting knob 340 is provided in the middle of the adjusting screw 34. Two adjacent clamping mechanisms 31 are connected by four adjusting screws 34. When the rotation amount of the adjusting knob 340 between two adjacent clamping mechanisms 31 is equal... Simultaneously, the distance between two adjacent clamping mechanisms 31 can be adjusted. When the rotation amount of the adjustment knob 340 between two adjacent clamping mechanisms 31 is not the same, the angle between the two adjacent clamping mechanisms 31 can be adjusted (at this time, the adjusting screw 34 remains straight, while the rubber sleeve 3113 will be squeezed by the threaded sleeve 3114 and produce a certain amount of elastic deformation). In this way, when the reinforcing bar 4 to be inspected is a threaded steel bar, by adjusting the distance and angle between the two adjacent clamping mechanisms 31, the clamping strip 3115 and the thread on the outer wall of the reinforcing bar 4 to be inspected can be made to fit together in the horizontal direction, thereby ensuring that the reinforcing bar 4 to be inspected and the clamp 3 will not move relative to each other, and thus ensuring that the thrust output by the hydraulic cylinder 2 can be the same as the axial tension of the reinforcing bar 4 to be inspected.

[0036] Figure 5 This is a reference diagram showing the assembly state of the fixture and pressure plate. See also... Figure 5Several adjustment holes 320 are provided at both ends of the top of the pressure plate 32. The adjustment holes 320 at the same end of the pressure plate 32 are arranged at intervals along a straight line, and the straight line containing the adjustment holes 320 is inclined (i.e., neither perpendicular to nor parallel to the axis of the reinforcing bar 4 to be inspected). Then, a suitable adjustment hole 320 is selected and screwed into the locking bolt 36, so that the outer wall of the locking bolt 36 fits against the outer wall of the clamp 3. In this way, after the distance and angle between the multiple clamping mechanisms 31 are adjusted, the vertical clamping effect of the clamp 3 can be achieved by locking a pair of locking bolts 33 in the threaded hole 12. The screw between the pair of locking bolts 36 and the pressure plate 32 is also used to achieve the vertical clamping effect. The interlocking mechanism enables lateral clamping of the clamp 3, ensuring reliable clamping of the reinforcing bar 4 to be inspected. This allows the distance between the clamps 3 to increase after the hydraulic cylinder 2 outputs a preset thrust, stretching the reinforcing bar 4 and comparing it to the standard condition to determine if it meets the standard. Specifically, if the reinforcing bar 4 does not break after the hydraulic cylinder 2's push rod outputs a preset thrust, its tensile strength meets the standard. If the reinforcing bar 4 breaks or develops obvious cracks just before or after the hydraulic cylinder 2's push rod outputs a preset thrust, its tensile strength does not meet the standard.

[0037] This embodiment also discloses a method for testing the performance of building steel reinforcement.

[0038] The method for testing the performance of building steel reinforcement includes the following steps: S1. Cut a suitable length from the steel bar to be used at the construction site and use it as the steel bar to be inspected 4. Loosen the locking bolt 33 so that the clamping mechanism 31 is in a relaxed state. Then insert both ends of the steel bar to be inspected 4 into the two clamps 3 respectively, and both ends of the steel bar to be inspected 4 are clamped by at least three clamping mechanisms 31. S2. Screw in the locking bolt 33 to initially lock the clamp 3, then rotate the adjusting knob 340 to adjust the distance and angle between the two adjacent clamping mechanisms 31; S3. Push the clamp 3, which is away from the hydraulic cylinder 2 and not connected to the hydraulic cylinder 2, toward the extension direction of the push rod of the hydraulic cylinder 2. When the limiting block 35 at the bottom of the clamp 3 is inserted into the slot 13 and the vertical end face of the limiting block 35 is in contact with the side wall of the limiting groove 11, lock the corresponding cover plate 5 and pressure plate 32 to achieve the locking and fixing of the clamp 3, which is not connected to the hydraulic cylinder 2, in the limiting groove 11. S4. Push the clamp 3, which is close to and connected to the hydraulic cylinder 2, toward the retraction direction of the push rod of the hydraulic cylinder 2. When the limiting block 35 at the bottom of the clamp 3 is inserted into the slot 13 and the vertical end face of the limiting block 35 is far away from the side wall of the limiting groove 11, lock the corresponding cover plate 5 and pressure plate 32 so that the clamp 3 connected to the hydraulic cylinder 2 can slide in the limiting groove 11. S5. Screw the two locking bolts 36 into the two adjusting holes 320 at both ends of the pressure plate 32 respectively and in a one-to-one correspondence, so that the outer wall of the locking bolt 36 fits against the side wall of the clamp 3. S6. The hydraulic cylinder 2 outputs a preset thrust, which pushes the clamp 3 connected to the hydraulic cylinder 2 via the connecting plate 20 to produce displacement, so that the steel bar 4 to be inspected is stretched. The state of the steel bar 4 to be inspected is then observed and compared with the standard state, and the inspection is completed.

[0039] This application utilizes a hydraulic cylinder 2 to output a preset thrust, causing a radial displacement between the two clamps 3 used to hold the reinforcing bar 4 to be inspected, thereby achieving a tensile effect on the reinforcing bar 4. The tensile direction of the reinforcing bar 4 is consistent with its axis. The thrust value output by the hydraulic cylinder 2 corresponds to the threshold value for the tensile strength of the reinforcing bar 4 to meet the standard. In other words, provided that the thrust output by the hydraulic cylinder 2 is accurate, it is only necessary to determine whether the tensile strength of the reinforcing bar 4 meets the standard based on whether it has broken or developed obvious cracks, without having to send it for testing using a universal testing machine to determine the specific value of the tensile strength. This reduces the manufacturing difficulty and cost of the testing device, and allows for on-site testing at any time, effectively improving testing efficiency and ensuring that the project progress is not affected by sending the reinforcing bar 4 for testing.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for detecting the performance of a building reinforcement, characterized in that, It includes a testing table (1), a hydraulic cylinder (2) and two clamps (3) on the testing table (1). The clamps (3) include several clamping mechanisms (31) arranged at intervals. Both ends of the steel bar (4) to be tested are clamped by several clamping mechanisms (31). The top of the testing table (1) is provided with two limiting grooves (11), and two clamps (3) are respectively and correspondingly located in the two limiting grooves (11). The hydraulic cylinder (2) is connected to one of the clamps (3) through a connecting plate (20) and pushes the clamp (3) to move along the axial direction of the reinforcing bar (4) to be tested in the limiting groove (11). The other clamp (3) is stuck in the limiting groove (11). The clamping mechanism (31) includes a pair of clamping plates (311), and each of the pair of clamping plates (311) has a groove (3111) on one side opposite to the other. The end of the reinforcing bar (4) to be inspected passes between the pair of grooves (3111). The clamp (3) also includes a pressure plate (32) and locking bolts (33). The pressure plate (32) covers the top of the clamping mechanism (31), and the two locking bolts (33) are screwed onto both ends of the pressure plate (32) and screwed into the top of the testing table (1). The clamping plate (311) is provided with two through holes (3112), which are located on both sides of the groove (3111). A rubber sleeve (3113) and a threaded sleeve (3114) are inserted into the through holes (3112). The rubber sleeve (3113) is fixed between the outer wall of the threaded sleeve (3114) and the inner wall of the through hole (3112). An adjusting screw (34) is provided between two adjacent clamping plates (311) in the horizontal direction. The two ends of the adjusting screw (34) are respectively adapted to be screwed into two adjacent threaded sleeves (3114). The threads at the two ends of the adjusting screw (34) are opposite in direction. An adjusting knob (340) is provided in the middle of the adjusting screw (34).

2. The building reinforcement performance detection device according to claim 1, characterized in that, The top of the testing platform (1) is provided with several threaded holes (12), one end of the locking bolt (33) covers the top of the pressure plate (32), and the other end of the locking bolt (33) is adapted to be screwed into the threaded hole (12).

3. The building steel reinforcement performance testing device according to claim 2, characterized in that, The testing table (1) is provided with two slots (13), and the two slots (13) are respectively connected to the side walls of the two limiting grooves (11). The side walls of the limiting grooves (11) are perpendicular to the reinforcing bar (4) to be tested and are opposite to the extension direction of the reinforcing bar (4) to be tested. The bottom of the clamp (3) is symmetrically provided with a pair of L-shaped limiting blocks (35). The horizontal end of one limiting block (35) is inserted into the slot (13), and the horizontal end of the other limiting block (35) is in contact with the bottom of the limiting groove (11). The opening of the limiting groove (11) is provided with a cover plate (5), and the bottom of the cover plate (5) covers the top of the horizontal end of the other limiting block (35).

4. The building steel reinforcement performance testing device according to claim 3, characterized in that, The upper part of the cover plate (5) covers the top of the testing table (1), and the cover plate (5) and the testing table (1) are detachably connected.

5. The building steel reinforcement performance testing device according to claim 3, characterized in that, The end face of the clamp (3) that is close to and connected to the hydraulic cylinder (2) is flush with the vertical end face of the corresponding limiting block (35), and the vertical end face of the limiting block (35) is far away from the side wall of the corresponding limiting groove (11). The end face of the clamp (3) that is away from the hydraulic cylinder (2) and not connected to the hydraulic cylinder (2) is flush with the vertical end face of the corresponding limiting block (35), and the vertical end face of the limiting block (35) is in contact with the side wall of the corresponding limiting groove (11).

6. The building steel reinforcement performance testing device according to claim 5, characterized in that, The top two ends of the pressure plate (32) away from the hydraulic cylinder (2) are provided with several adjustment holes (320). The adjustment holes (320) are arranged at intervals along a straight line at the ends of the pressure plate (32). The pressure plate (32) is also provided with two locking bolts (36). The two locking bolts (36) are respectively screwed into one of the adjustment holes (320) at both ends of the pressure plate (32). The outer walls of the two locking bolts (36) are respectively attached to the two side walls of the clamp (3).

7. The building steel reinforcement performance testing device according to claim 6, characterized in that, The groove (3111) is provided with a retaining strip (3115), which presses against the outer wall of the steel bar (4) to be inspected.

8. A method for testing the performance of reinforcing steel bars in construction, characterized in that, The method of using the building steel reinforcement performance testing device according to any one of claims 1-7 includes the following steps: S1. Cut a suitable length of the reinforcing bar (4) to be inspected, loosen the locking bolt (33) and insert both ends of the reinforcing bar (4) to be inspected into the two clamps (3) respectively; S2. Rotate the adjustment knob (340) to adjust the distance and angle between two adjacent clamping mechanisms (31); S3. Push the clamp (3) that is far away from the hydraulic cylinder (2) and not connected to the hydraulic cylinder (2) toward the extension direction of the push rod of the hydraulic cylinder (2). When the limiting block (35) at the bottom of the clamp (3) is inserted into the slot (13) and the vertical end face of the limiting block (35) is in contact with the side wall of the limiting groove (11), lock the corresponding cover plate (5) and pressure plate (32). S4. Push the clamp (3) that is close to and connected to the hydraulic cylinder (2) toward the retraction direction of the push rod of the hydraulic cylinder (2). When the limiting block (35) at the bottom of the clamp (3) is inserted into the slot (13) and the vertical end face of the limiting block (35) is far away from the side wall of the limiting groove (11), lock the corresponding cover plate (5) and pressure plate (32). S5. Screw the two locking bolts (36) into the two adjusting holes (320) at both ends of the pressure plate (32) respectively and in a one-to-one correspondence, so that the outer wall of the locking bolt (36) fits against the side wall of the clamp (3); S6. The hydraulic cylinder (2) outputs a preset thrust, which pushes the clamp (3) connected to the hydraulic cylinder (2) through the connecting plate (20) to produce displacement. The state of the steel bar (4) to be inspected is observed and compared with the standard state. The inspection is completed.

Images