A reinforcing steel bar tensile strength detection device

Abstract

The application relates to the technical field of steel bar detection, in particular to a steel bar tensile strength detection device which comprises a rack and a stretching mechanism, the stretching mechanism comprises a fixing base, a sliding base, a hydraulic pulling cylinder, a fixing assembly and a clamping assembly, the fixing base is arranged at one end of the rack, the hydraulic pulling cylinder is arranged on the fixing base, the sliding base is slidably connected to the rack and is fixed through the fixing assembly, the hydraulic pulling cylinder and the sliding base are both provided with the clamping assembly, and the clamping assembly is used for fixing a steel bar. The application has the effect of improving the applicability of the equipment.

Description

Technical Field

[0001] This application relates to the technical field of rebar testing, and in particular to a rebar tensile strength testing device. Background Technology

[0002] Currently, reinforcing steel refers to steel used in reinforced concrete and prestressed reinforced concrete. Its cross-section is circular, sometimes square with rounded corners, and includes plain round bars, ribbed bars, and twisted bars. The tensile strength of reinforcing steel is an important indicator of its mechanical properties. Tensile strength is the maximum tensile force a steel bar can withstand before breaking, divided by its cross-sectional area. The level of tensile strength directly affects the ability of reinforced concrete structures to resist repeated loads. The tensile strength of reinforcing steel is primarily tested using a steel bar tensile testing machine.

[0003] A search revealed that Chinese patent application number 2020214159442 discloses a rebar tensioning device, comprising a base plate and a top plate. The base plate and the top plate have the same structural dimensions, and hydraulic cylinders are vertically connected to both sides between them. A lower fixed seat and an upper fixed seat are respectively installed at the geometric center of the upper surface of the base plate and the top plate. The upper fixed seat is an integral structure for the top plate. Clamping seats are fixedly installed on the left and right sides of the base plate near the lower fixed seat, and the lower fixed seat is slidably installed in the clamping seats. Both the lower fixed seat and the upper fixed seat have placement grooves inside, and clamps are installed inside the placement grooves. The clamps are composed of two semi-conical right clamping plates and a left clamping plate spliced ​​together, and clamping grooves are provided on the opposite inner surfaces of the right clamping plates and the left clamping plates.

[0004] In the process of developing this application, the inventors discovered that the technology has at least the following problems: when stretching long steel bars, the two ends of the steel bars are difficult to fix, which also causes the stretching device to be too high and inconvenient, thus limiting the use of the stretching device and resulting in poor applicability. Summary of the Invention

[0005] To improve the applicability of the equipment, this application provides a device for testing the tensile strength of reinforcing bars.

[0006] This application provides a device for testing the tensile strength of reinforcing bars, which adopts the following technical solution:

[0007] A device for testing the tensile strength of reinforcing bars includes a frame and a tensioning mechanism. The tensioning mechanism includes a fixed base, a sliding base, a hydraulic cylinder, a fixing component, and a clamping component. The fixed base is disposed at one end of the frame, the hydraulic cylinder is disposed on the fixed base, the sliding base is slidably connected to the frame and fixed by the fixing component, and the clamping component is disposed on both the hydraulic cylinder and the sliding base. The clamping component is used to fix the reinforcing bars.

[0008] By adopting the above technical solution, when it is necessary to test the tensile strength of long steel bars, the sliding seat is first slid away from the fixed seat until it reaches a suitable position. Then, the sliding seat is fixed with the fixing component. The steel bar is then placed between the two clamping components and fixed with the clamping components. Finally, the tensile test is performed on the steel bar using a hydraulic cylinder, and the data is recorded. The position of the sliding seat is adjustable, which allows for the stretching of long steel bars, thereby improving the applicability of the equipment. Furthermore, the flat frame makes the tensile test of long steel bars more convenient, thus improving work efficiency.

[0009] Optionally, the clamping assembly includes a fixed head, a left clamp, a right clamp, and clamping cylinders. The fixed head is provided on both the piston cylinder of the hydraulic pull cylinder and the sliding seat. The left clamp and the right clamp are slidably mounted on the fixed head. The fixed head is provided with two clamping cylinders that drive the left clamp and the right clamp to move closer to each other.

[0010] By adopting the above technical solution, after placing the reinforcing bar between the left and right clamps, the clamping cylinder is activated, which drives the left and right clamps to move closer to each other, thus fixing the reinforcing bar. The clamping assembly has a simple structure and provides a more reliable fixation for the reinforcing bar.

[0011] Optionally, the frame is provided with an auxiliary mechanism, which includes an auxiliary plate and support wheels. The auxiliary plate is disposed on the frame, and each of the fixed heads is provided with a support wheel. The support wheel abuts against the auxiliary plate and slides along the auxiliary plate.

[0012] By adopting the above technical solution, when the steel bar is stretched, the piston rod of the hydraulic cylinder needs to extend. If the piston rod extends too far, the end will droop, resulting in inconsistent clamping positions of the steel bar. At the same time, there will be vertical displacement during the retraction of the piston rod, which may even generate a certain shear force on the steel bar, thus interfering with the tensile strength test. The auxiliary plate and support wheel provide support for the fixing head, thereby reducing the downward deflection of the fixing head and piston rod and reducing interference with the tensile strength test of the steel bar.

[0013] Optionally, the auxiliary plate is composed of multiple splicing plates, and the splicing plates are all slidably connected to the frame and slide in the vertical direction. The frame is provided with a support assembly, which is used to drive the splicing plates to slide.

[0014] By adopting the above technical solution, some thicker and longer steel bars are relatively heavy and inconvenient to clamp and fix. The splicing plate is lifted to the required height by the support component, and then the steel bar is placed on the splicing plate so that the steel bar corresponds with the clamping position of the clamping component. Then the clamping component is used to fix the steel bar. The set support component and the spliced ​​auxiliary plate make the clamping of steel bars more convenient. Moreover, the spliced ​​auxiliary plate makes it easy to lift an appropriate number of splicing plates as needed, making the fixing of steel bars more convenient and further improving work efficiency.

[0015] Optionally, the support assembly is provided in multiple sets, each corresponding to the splicing plate. The support assembly includes a rotating handle, a gear, and a rack. The rack is slidably disposed on the frame in a vertical direction. The rack abuts against the splicing plate and drives the splicing plate to slide. The gear is rotatably connected to the frame and meshes with the rack. The rotating handle is disposed on the frame and coaxially connected to the gear.

[0016] By adopting the above technical solution, after the position of the sliding seat is fixed, the handle is rotated according to the length of the reinforcing bar. Rotating the handle drives the gear to rotate, the gear drives the rack to slide in the vertical direction, and the rack drives the splicing plate to rise. Then the reinforcing bar is placed on the splicing plate and then fixed. The set support component has a simple structure and is easy to operate. Moreover, the set support component enables the splicing plate to have a dual function. It can play an auxiliary role during installation and can provide a certain support for the fixing head when forming an auxiliary plate.

[0017] Optionally, the frame is provided with limiting components, and multiple limiting components are provided, each corresponding to a plurality of the splicing plates. Each limiting component includes a limiting strip, a limiting rod, a limiting plate, and a telescopic spring. The limiting strip is disposed on the frame; the limiting rod is slidably connected to the limiting strip and slides along the length direction of the splicing plate, and the limiting rod abuts against the side wall of the splicing plate near the ground; the limiting plate is disposed on the limiting rod, and the telescopic spring is sleeved on the limiting rod. The telescopic spring is connected to the limiting plate and the limiting strip, and the telescopic spring pushes the limiting rod to slide towards the center of the frame. The side wall of the splicing plate near the support component can abut against the limiting rod and restrict the splicing plate from moving towards the ground.

[0018] By adopting the above technical solution, the splicing plate slides vertically, and then the sliding limit rod moves. The limit rod drives the limit plate to slide and compresses the telescopic spring. When the splicing plate passes the limit rod, the limit rod is released, and the telescopic spring drives the limit plate to slide towards the middle of the frame. The limit rod abuts against the side wall of the splicing plate near the ground. The set limit component can fix and support the splicing plate, which can reduce the movement of the splicing plate caused by the steel bars when they are clamped and fixed, thus changing the position of the steel bars and improving the stability of the steel bars.

[0019] Optionally, a guide surface is provided on the side wall of the limiting rod near the ground, which facilitates the splicing plate to pass over the limiting rod.

[0020] By adopting the above technical solution, when the splicing plate is slid vertically by the support component, the splicing plate abuts against the guide surface. The splicing plate continues to rise and drives the limit rod to slide away from the center of the frame. The telescopic spring is compressed, and the splicing plate passes the limit rod. The telescopic spring releases its elastic force and drives the limit rod to slide towards the center of the frame, stopping the support of the splicing plate by the support component. The splicing plate falls on the limit rod. The guide surface makes it easier for the splicing plate to pass the limit rod, reducing the chance of manually pulling the limit rod, thereby reducing labor costs while improving work efficiency.

[0021] Optionally, the limiting rod has a driving groove, and the limiting bar has a release assembly. The release assembly includes a return spring and a driving block. The driving block is slidably disposed on the frame in a vertical direction. The limiting rod has a driving groove, and the driving block can slide into the driving groove and drive the limiting rod to slide away from the center of the frame. The frame has a return spring, which is connected to the driving block and drives the driving block away from the limiting rod.

[0022] By adopting the above technical solution, after the steel bar is clamped and fixed, the driving block is pressed down and slides into the driving groove. The driving block drives the limiting rod to slide away from the middle of the frame. The limiting rod separates from the splicing plate, and the splicing plate falls under its own weight. Multiple splicing plates form a complete auxiliary plate. During the process of the piston rod of the hydraulic cylinder driving the fixed head to slide, the fixed head drives the support wheel to slide along the auxiliary plate, thereby supporting the fixed head and making the central axis of the two fixed heads always coincide, thus reducing the interference of tensile testing.

[0023] Optionally, the frame is provided with a limit adjustment mechanism, and the limit bar is slidably disposed on the frame in a vertical direction. The limit adjustment mechanism includes a tension spring and an adjusting wheel. The tension spring is disposed on the frame and pushes the limit bar to slide towards the ground. The adjusting wheel is rotatably connected to the frame, and the side wall of the adjusting wheel abuts against the ground side of the limit bar and drives the limit bar away from the ground.

[0024] By adopting the above technical solution, when the thickness of the reinforcing bars is inconsistent, the adjusting wheel can be rotated according to the thickness of the reinforcing bars. The adjusting wheel drives the limiting strip to slide away from the ground. The tension spring contracts and drives the limiting strip to press against the adjusting wheel. The position of the limiting block changes, which in turn changes the bearing height of the splicing plate. The set limiting adjustment mechanism makes the auxiliary effect of the equipment applicable to reinforcing bars of various angles and specifications, thereby improving its applicability.

[0025] Optionally, the auxiliary mechanism further includes an anti-scraping component, which includes an anti-scraping rod and anti-scraping rollers. The anti-scraping rod is disposed on the frame and is arranged along the length direction of the frame. A plurality of anti-scraping rollers are disposed on the fixed head, and the anti-scraping rollers are rotatably connected to the anti-scraping rod.

[0026] By adopting the above technical solution, when the fixed head slides, the fixed head drives the anti-deflection roller to slide along the anti-deflection rod; the anti-deflection component can reduce the downward deflection of the fixed head, and at the same time, it works together with the support wheel to reduce the impact of the piston rod's downward deflection on the tensile strength test of the steel bar, thereby maintaining the test accuracy.

[0027] In summary, this application includes the following beneficial technical effects:

[0028] 1. When it is necessary to test the tensile strength of long steel bars, first slide the sliding seat away from the fixed seat until the sliding seat slides to the appropriate position. Then, fix the sliding seat with the fixing component. Next, place the steel bar between the two clamping components and fix the steel bar with the clamping components. Then, use the hydraulic cylinder to perform the tensile test on the steel bar and record the data. The position of the sliding seat is adjustable, which can stretch long steel bars, thereby improving the applicability of the equipment. Moreover, the frame is laid flat, which makes the tensile test on long steel bars more convenient, thereby improving work efficiency.

[0029] 2. After the reinforcing bar is clamped and fixed, the driving block is pressed down and slides into the driving groove. The driving block drives the limiting rod to slide away from the center of the frame. The limiting rod separates from the splicing plate. The splicing plate falls under its own weight. Multiple splicing plates form a complete auxiliary plate. During the process of the piston rod of the hydraulic cylinder driving the fixed head to slide, the fixed head drives the support wheel to slide along the auxiliary plate, thereby supporting the fixed head and making the central axis of the two fixed heads always coincide, thus reducing the interference of tensile testing.

[0030] 3. When the thickness of the reinforcing bars is inconsistent, the adjusting wheel can be rotated according to the thickness of the reinforcing bars. The adjusting wheel drives the limiting strip to slide away from the ground. The tension spring contracts and drives the limiting strip to press against the adjusting wheel. The position of the limiting block changes, which changes the bearing height of the splicing plate. The setting of the limiting adjustment mechanism makes the auxiliary effect of this equipment applicable to reinforcing bars of various angles and specifications, thereby improving its applicability. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the steel bar tensile strength testing device in the embodiments of this application;

[0032] Figure 2 This is a schematic diagram of the tensioning mechanism in the embodiments of this application;

[0033] Figure 3 This is a schematic diagram of the anti-deflection component in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram of the supporting components in the embodiments of this application;

[0035] Figure 5 This is a schematic diagram of the auxiliary mechanism in the embodiments of this application;

[0036] Figure 6 This is a schematic diagram of the limit adjustment mechanism in the embodiments of this application;

[0037] Figure 7 This is a partial structural schematic diagram of the limit adjustment mechanism in an embodiment of this application.

[0038] Reference numerals: 100, frame; 110, sliding groove; 200, tensioning mechanism; 210, fixed seat; 220, sliding seat; 230, hydraulic cylinder; 240, fixing assembly; 241, fixing frame; 242, fixing rod; 250, clamping assembly; 251, fixing head; 252, left clamp; 253, right clamp; 254, clamping cylinder; 300, auxiliary mechanism; 310, auxiliary plate; 311, splicing plate; 320, support wheel; 330, support assembly; 331, rotating handle; 332, rack; 333, gear; 334, lifting plate; 340, limiting assembly; 341. Limiting strip; 342. Limiting rod; 343. Limiting plate; 344. Telescopic spring; 350. Release assembly; 351. Pressing rod; 352. Reset spring; 353. Drive block; 354. Drive groove; 360. Anti-bending assembly; 361. Anti-bending rod; 362. Anti-bending roller; 363. Gear motor; 364. Drive wheel; 365. Driven wheel; 366. Connecting shaft; 367. Belt; 400. Limit adjustment mechanism; 410. Tension spring; 420. Adjusting wheel; 430. Adjusting gear; 440. Rotating block; 460. Synchronous pulley; 470. Synchronous belt; 500. Cover plate. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0040] This application discloses a device for testing the tensile strength of reinforcing bars.

[0041] refer to Figure 1 The rebar tensile strength testing device includes a frame 100 placed horizontally on the ground and a tensioning mechanism 200 for stretching rebars mounted on the frame 100. The tensioning mechanism 200 includes a fixed seat 210 fixedly connected to one end of the frame 100, a sliding seat 220 sliding along the length of the frame 100 and slidably connected to the frame 100, a hydraulic cylinder 230 mounted on the fixed seat 210 and facing the sliding seat 220, two clamping assemblies 250 respectively mounted on the piston rod of the hydraulic cylinder 230 and on the sliding seat 220, and a fixing assembly 240 mounted on the frame 100 for fixing the sliding seat 220. The axis of the hydraulic cylinder 230 is parallel to the axis of the frame 100.

[0042] refer to Figure 2 and 3The fixing component 240 includes a fixing frame 241 integrally disposed at the end of the sliding seat 220 away from the hydraulic cylinder 230. The fixing frame 241 has a first connecting hole, and the frame 100 has a plurality of second connecting holes. The plurality of second connecting holes are equally spaced and their axes are parallel to the axis of the first connecting hole. A fixing rod 242 is inserted into one of the second connecting holes. The fixing rod 242 passes through the second connecting hole and the first connecting hole in sequence and restricts the sliding of the fixing frame 241.

[0043] refer to Figure 2 and 3 Both the sliding seat 220 and the fixed seat 210 are provided with clamping assemblies 250. Each clamping assembly 250 includes two fixed heads 251, respectively fixedly connected to the piston rod of the hydraulic cylinder 230 and the sliding seat 220. The two fixed heads 251 are located between the sliding seat 220 and the fixed seat 210. Each fixed head 251 has a clamping groove, within which a left clamp 252 and a right clamp 253 are slidably connected. The left clamp 252 and the right clamp 253 slide towards each other or... The left clamp 252 and the right clamp 253 slide in opposite directions. Fixed grooves are provided on the side walls of the left clamp 252 and the right clamp 253 that are close to each other, and the reinforcing bars can be located in the fixed grooves. Two clamping cylinders 254 are fixedly connected to the fixed head 251. The axis of the clamping cylinder 254 is perpendicular to the sliding axis of the sliding seat 220. The two clamping cylinders 254 are located on the opposite sides of the left clamp 252 and the right clamp 253, respectively. The two clamping cylinders 254 drive the left clamp 252 and the right clamp 253 to slide.

[0044] refer to Figure 4 and 5 An auxiliary mechanism 300 is provided on the frame 100. The auxiliary mechanism 300 includes an auxiliary plate 310, which is composed of multiple splicing plates 311. The multiple splicing plates 311 are slidably connected to the frame 100 in the vertical direction. Two support wheels 320 are rotatably connected to the side wall of the fixing head 251 near the splicing plate 311. The support wheels 320 abut against the splicing plate 311 and can roll along the length of the frame 100.

[0045] refer to Figure 4The frame 100 is provided with a support assembly 330, which has multiple components and corresponds to multiple splicing plates 311. The support assembly 330 includes a rotating handle 331 rotatably connected to the outer wall of the frame 100. The rotating shaft of the rotating handle 331 passes through the frame 100 and extends into the inner side of the frame 100 and is fixedly connected to a gear 333. The gear 333 is rotatably connected to the frame 100. Multiple racks 332 are slidably connected to the frame 100. The racks 332 mesh with the gears 333. A lifting plate 334 is fixedly connected to one end of the racks 332 near the splicing plate 311. The lifting plate 334 abuts against the splicing plate 311 and drives the splicing plate 311 to rise. The frame 100 is provided with a support groove for supporting the lifting plate 334. The lifting plate 334 sinks into the support groove.

[0046] refer to Figure 5 and 6 The frame 100 has two sliding grooves 110, both of which are located along the length of the frame 100 and on both sides of the fixed head 251. A limit assembly 340 is provided on the frame 100. The limit assembly 340 includes two limit bars 341 that are slidably connected to the sliding grooves 110 in the vertical direction. Sliding holes are provided on the sidewalls of the limit bars 341 that are close to each other. Limit rods 342 are slidably connected within the sliding holes. The limit rods 342 can slide to above the end of the splicing plate 311. Guides are provided on the sidewall of the limit rods 342 near the splicing plate 311. The guide surface is inclined, with one end near the axis of the frame 100 tilted away from the splicing plate 311. A limit groove is provided on the inner wall of the sliding hole, and a limit plate 343 is slidably connected in the limit groove. The limit plate 343 is fixedly connected to the limit rod 342. A telescopic spring 344 is sleeved on the limit rod 342. One end of the telescopic spring 344 is connected to the limit plate 343, and the end of the telescopic spring 344 away from the limit plate 343 is fixedly connected to the side wall of the limit groove away from the axis of the frame 100. The telescopic spring 344 pushes the limit plate 343 closer to the middle of the frame 100.

[0047] refer to Figure 6 and 7A limit adjustment mechanism 400 is provided on the frame 100. The limit adjustment mechanism 400 includes multiple tension springs 410 fixedly connected to the side wall of the sliding groove 110 away from the ground. The multiple tension springs 410 are evenly spaced along the length of the sliding groove 110. The tension springs 410 are connected to the limit bar 341 and push the limit bar 341 closer to the ground. Multiple adjusting wheels 420 are rotatably connected inside the sliding groove 110. The multiple adjusting wheels 420 are all located on the side of the limit bar 341 away from the tension springs 410. The multiple adjusting wheels 420 are evenly spaced along the length of the sliding groove 110. The adjusting wheels 420 are rotatably connected to the limit bar 341 away from the tension springs 410. The limiting rods 342 are staggered, and the adjusting wheel 420 is integrally provided with multiple adjusting teeth 430. The multiple adjusting teeth 430 are equally spaced along the circumference of the adjusting wheel 420 and their length gradually decreases along the circumference. The limiting strip 341 is provided with a shallow groove, and the end of one of the adjusting teeth 430 is pointed and locked in the shallow groove. A rotating block 440 is provided on the frame 100. The rotating block 440 is coaxially connected to the adjusting wheel 420 in the middle, and two synchronous pulleys 460 are fixedly connected to the side of each adjusting wheel 420 near the rotating block 440. The adjacent synchronous pulleys 460 are driven by a synchronous belt 470.

[0048] refer to Figure 6 The frame 100 has multiple through slots, which correspond to the positions of the limiting rods 342. To facilitate the sliding of the limiting rods 342, the frame 100 is provided with multiple sets of release components 350. Each set of release components 350 corresponds to a different limiting rod 342. Each release component 350 includes a drive block 353, which slides vertically on the frame 100. The drive block 353 is located above the limiting rods 342. A wedge-shaped surface is provided at one end of the drive block 353 near the limiting rods 342. This wedge-shaped surface is inclined, and the end of the drive block 353 is inclined towards the center of the frame 100. The limiting bar 341 has... A drive groove 354 is provided, and one end of the drive block 353 with a wedge-shaped surface can be located in the drive groove 354, and the wedge-shaped surface abuts against the drive groove 354; a return spring 352 is fixedly connected to the frame 100, and the return spring 352 is connected to the drive block 353 and drives the drive block 353 away from the limit rod 342; one end of multiple drive blocks 353 located on the outside of the frame 100 is fixedly connected to a pressing rod 351; pressing down the pressing rod 351 can drive the drive block 353 to slide into the drive groove 354, and pull the limit rod 342 back into the sliding hole, and the splicing plate 311 separates from the limit rod 342 and falls freely to the ground.

[0049] refer to Figure 2 and 3The frame 100 is provided with an anti-deflection assembly 360, which includes two anti-deflection rods 361 fixedly connected to the frame 100. The anti-deflection rods 361 are arranged along the length of the frame 100. Each fixed head 251 is rotatably connected with four anti-deflection rollers 362. The anti-deflection rollers 362 are in rolling connection with the anti-deflection rods 361 and are located on the side of the anti-deflection rods 361 away from the frame 100. The peripheral sidewall of the anti-deflection rollers 362 is provided with a rolling groove, and the anti-deflection rods 361 are located in the rolling groove. The two anti-deflection rollers 362 on the sliding seat away from the fixed seat 210 are coaxially connected to a connecting shaft 366. A driven wheel 365 is coaxially connected to the connecting shaft 366. A reduction motor 363 is fixedly connected to the fixed head 251 on the sliding seat. A driving wheel 364 is keyed to the output shaft of the reduction motor 363. A belt 367 is fitted on both the driving wheel 364 and the driven wheel 365. Start the geared motor 363, which drives the drive wheel 364 to rotate. The drive wheel 364 drives the driven wheel 365 to rotate via the belt 367. The driven wheel 365 drives the connecting shaft 366 to rotate. The connecting shaft 366 drives the anti-deflection roller 362 to rotate. The anti-deflection roller 362 rolls along the anti-deflection rod 361.

[0050] refer to Figure 1 A cover plate 500 is provided on the frame 100. The cover plate 500 is rotatably connected to one side of the frame 100 and can be placed on top of the frame 100 to reduce the breaking and splashing of steel bars during the tensile strength test.

[0051] The implementation principle of the rebar tensile strength testing device in this application embodiment is as follows: Based on the length of the rebar to be tested, the reduction motor 363 is started. The reduction motor 363 drives the drive wheel 364 to rotate. The drive wheel 364 drives the driven wheel 365 to rotate via the belt 367. The driven wheel 365 drives the connecting shaft 366 to rotate. The connecting shaft 366 drives the anti-deflection roller 362 to roll, and causes the sliding seat 220 to slide. Then, the sliding seat 220 is fixed with the fixing rod 242. Next, based on the rebar specifications, the adjusting wheel 420 is rotated. The adjusting wheel 420 causes the position of the limiting strip 341 to change. Then, based on the position of the sliding seat 220 and the length of the rebar, the appropriate position of the rotating handle 331 is selected. Rotating the rotating handle 331 drives the gear 333 to rotate. The gear 333 drives the rack 332 to slide. The rack 332 causes the splicing plate 311 to rise, splicing... Plate 311 abuts against the guide surface and drives the limiting rod 342 to retract into the sliding hole until the splicing plate 311 passes the limiting rod 342. The telescopic spring 344 drives the limiting rod 342 to slide out of the sliding hole and abut against the side wall of the splicing plate 311 near the ground. Then, the rotating handle 331 is released, and the rack 332 falls freely to the initial position. Then, the steel bar is placed on the splicing plate 311, and the clamping cylinder 254 is activated. The clamping cylinder 254 drives the left clamp 252 and the right clamp 253 to clamp the steel bar. Then, the pressing rod 351 is pressed down, and the pressing rod 351 drives the driving block 353 to slide. The driving block 353 drives the limiting rod 342 to retract into the sliding hole. The splicing plate 311 falls freely and forms a plane with the adjacent splicing plate 311 for the support wheel 320 to roll. The rotating cover plate 500 covers the steel bar, and then the hydraulic pull cylinder 230 is used to perform tensile testing on the steel bar.

[0052] 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 testing the tensile strength of reinforcing bars, characterized in that, The device includes a frame (100) and a tensioning mechanism (200). The tensioning mechanism (200) includes a fixed base (210), a sliding base (220), a hydraulic cylinder (230), a fixing component (240), and a clamping component (250). The fixed base (210) is disposed at one end of the frame (100). The hydraulic cylinder (230) is disposed on the fixed base (210). The sliding base (220) is slidably connected to the frame (100) and fixed by the fixing component (240). The clamping component (250) is disposed on both the hydraulic cylinder (230) and the sliding base (220). The clamping component (250) is used to fix the reinforcing bars. The clamping assembly (250) includes a fixed head (251), a left clamp (252), a right clamp (253), and clamping cylinders (254). The fixed head (251) is provided on the piston cylinder of the hydraulic cylinder (230) and on the sliding seat (220). The left clamp (252) and the right clamp (253) are slidably disposed on the fixed head (251). The fixed head (251) is provided with two clamping cylinders (254) that drive the left clamp (252) and the right clamp (253) to move closer to each other. An auxiliary mechanism (300) is provided on the frame (100). The auxiliary mechanism (300) includes an auxiliary plate (310) and a support wheel (320). The auxiliary plate (310) is provided on the frame (100). The support wheel (320) is provided on each of the fixed heads (251). The support wheel (320) abuts against the auxiliary plate (310) and slides along the auxiliary plate (310). The auxiliary plate (310) is composed of multiple splicing plates (311), and the splicing plates (311) are all slidably connected to the frame (100) and slide in the vertical direction. The frame (100) is provided with a support assembly (330), which is used to drive the splicing plates (311) to slide. The support assembly (330) is provided in multiple sets and corresponds to the splicing plate (311) respectively. The support assembly (330) includes a rotating handle (331), a gear (333) and a rack (332). The rack (332) is slidably disposed on the frame (100) in the vertical direction. The rack (332) abuts against the splicing plate (311) and drives the splicing plate (311) to slide. The gear (333) is rotatably connected to the frame (100) and meshes with the rack (332). The rotating handle (331) is disposed on the frame (100) and coaxially connected to the gear (333). The frame (100) is provided with limit components (340), and multiple limit components (340) are provided, each corresponding to a multiple splicing plates (311). Each limit component (340) includes a limit strip (341), a limit rod (342), a limit plate (343), and a telescopic spring (344). The limit strip (341) is provided on the frame (100). The limit rod (342) is slidably connected to the limit strip (341) and slides along the length direction of the splicing plate (311). The limit rod (342) and the splicing plate (311) are connected to each other. 11) The side wall near the ground abuts; the limiting plate (343) is disposed on the limiting rod (342), the telescopic spring (344) is sleeved on the limiting rod (342), the telescopic spring (344) is connected to the limiting plate (343) and the limiting strip (341), the telescopic spring (344) pushes the limiting rod (342) to slide towards the middle of the frame (100), the splicing plate (311) near the side wall of the support assembly (330) can abut against the limiting rod (342) and restrict the splicing plate (311) from approaching the ground.

2. The steel bar tensile strength testing device according to claim 1, characterized in that, The limiting rod (342) has a guide surface on its side wall near the ground, which facilitates the splicing plate (311) to pass over the limiting rod (342).

3. The steel bar tensile strength testing device according to claim 1, characterized in that, The limiting rod (342) is provided with a drive groove (354), and the limiting bar (341) is provided with a release component (350). The release component (350) includes a return spring (352) and a drive block (353). The drive block (353) is slidably disposed on the frame (100) in the vertical direction. The limiting rod (342) is provided with a drive groove (354). The drive block (353) can slide into the drive groove (354) and drive the limiting rod (342) to slide away from the middle of the frame (100). The frame (100) is provided with the return spring (352). The return spring (352) is connected to the drive block (353) and drives the drive block (353) away from the limiting rod (342).

4. The steel bar tensile strength testing device according to claim 1, characterized in that, The frame (100) is provided with a limit adjustment mechanism (400). The limit bar (341) is slidably disposed on the frame (100) in the vertical direction. The limit adjustment mechanism (400) includes a tension spring (410) and an adjustment wheel (420). The tension spring (410) is disposed on the frame (100) and pushes the limit bar (341) to slide towards the ground. The adjustment wheel (420) is rotatably connected to the frame (100). The side wall of the adjustment wheel (420) near the ground abuts against the ground and drives the limit bar (341) away from the ground.

5. The steel bar tensile strength testing device according to claim 1, characterized in that, The auxiliary mechanism (300) further includes a deflection prevention assembly (360), which includes a deflection prevention rod (361) and deflection prevention rollers (362). The deflection prevention rod (361) is disposed on the frame (100) along the length of the frame (100). A plurality of deflection prevention rollers (362) are disposed on the fixing head (251), and the deflection prevention rollers (362) are rotatably connected to the deflection prevention rod (361).

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