A device and method for detecting the strength of concrete

Abstract

The present invention relates to the technical field of concrete detection, and specifically relates to a concrete strength detection device and a detection method. The device includes a detection table, on the top of which a torsion detection component is rotatably arranged for detecting the anti-torsion of a concrete slab. The torsion detection component includes two torsion horizontal shafts distributed left and right. On the top of the detection table, two side enclosure bases distributed left and right are fixedly installed. Both of the two torsion horizontal shafts are rotatably installed inside the two side enclosure bases through bearings respectively. At the closer ends of the two torsion horizontal shafts, U-shaped clamping frames are fixedly installed. The concrete slab is clamped and fixed in the up and down directions by the two clamping domes above and below, and the left and right two U-shaped clamping frames are rotated reversely along the connection position of the torsion horizontal shafts and the side enclosure bases, so as to apply torsion to the concrete slab in the left and right directions and detect the anti-torsion effect of the concrete slab.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete detection, and specifically relates to a concrete strength detection device and a detection method. Background Art

[0002] According to the authorized announcement number of the Chinese patent: CN111693376B, a disclosed concrete compressive strength detection device includes a bottom plate, a support rod, a top plate, a centering mechanism and a load mechanism. The centering mechanism includes an infrared emission tube, an infrared receiving tube, a sliding plate and an electric push rod. The load mechanism includes a pressing block, a pressure sensor, a hydraulic cylinder, a controller and a display screen. When a concrete specimen is placed at the compression station on the bottom plate, if the concrete specimen blocks the infrared emission tube inside the bottom plate, the controller controls the electric push rod on the same side of the blocked infrared emission tube to push the concrete specimen so that it moves to the compression station. Then the controller controls the hydraulic cylinder to drive the pressing block to move down to break the concrete specimen, and displays the compressive strength information during the detection process on the display screen, which can ensure the center alignment of the concrete specimen and the pressing block, prevent the deviation of the position of the concrete specimen from causing detection errors, and ensure the detection effect;

[0003] However, in the actual use process of concrete slabs, due to the action of external forces, not only the concrete is subjected to a positive pressure, but in some cases, the concrete slabs are also subjected to torsional forces in different directions. Obviously, the above device does not have the function of detecting the anti-torsion effect of concrete slabs. Therefore, we propose a concrete strength detection device and a detection method to realize the detection of the anti-torsion effect of concrete. Summary of the Invention

[0004] For this reason, the present invention provides a concrete strength detection device and a detection method to solve the above problems.

[0005] The present invention provides the following technical solutions: A concrete strength detection device includes a detection table;

[0006] A torsion detection component, the top of the detection table is rotatably provided with a torsion detection component for detecting the anti-torsion force of the concrete slab;

[0007] An automatic picking component, the top of the detection table is rotatably provided with an automatic picking component for automatically tensioning the concrete slab;

[0008] A positioning component, the top of the detection table is movably provided with a positioning component for limiting the torsion of the torsion detection component.

[0009] As a preferred solution of the present invention, the torsion detection component includes two torsion horizontal shafts distributed left and right. On the top of the detection table, two side wall bases distributed left and right are fixedly installed. Both of the two torsion horizontal shafts are rotatably installed inside the two side wall bases through bearings respectively. At one end of the two torsion horizontal shafts close to each other, U-shaped clamping frames are fixedly installed. On the top wall and the bottom wall of the U-shaped clamping frame, two triangular sliding tables distributed front and back are fixedly installed. Chutes are opened on the wedge surfaces of the triangular sliding tables. Sliders are slidably installed inside the chutes. On one side surface of the slider away from the triangular sliding table, a tensioning seat is fixedly installed. On one side surface of the tensioning seat away from the slider, an adjustment hole is opened. A threaded column is arranged inside the adjustment hole. At one end of the threaded column away from the adjustment hole, a clamping dome is fixedly installed.

[0010] As a preferred solution of the present invention, the automatic picking component includes a picking turntable rotatably installed on the outer wall of the torsion horizontal shaft. On one side surface of the picking turntable close to the U-shaped clamping frame, path circular cams are fixedly installed. Four guiding holes are penetrated through one side surface of the U-shaped clamping frame close to the path circular cams. The positions of the four guiding holes correspond to the positions of the triangular sliding tables one by one. Derivation sliding columns are slidably installed inside the guiding holes. One end of the derivation sliding column abuts against one side of the tensioning seat at the corresponding position, and the end of the derivation sliding column away from the tensioning seat abuts against the flange of the path circular cam.

[0011] As a preferred solution of the present invention, two pin shafts distributed front and back are fixedly installed on one side surface of the picking turntable away from the path circular cam. At the left end and the right end of the top of the detection table, hydraulic cylinders are hinged. The positions of the hydraulic cylinders correspond to the positions of the pin shafts one by one, and the top of the output rod of the hydraulic cylinder is hinged to the outer wall of the pin shaft at the corresponding position.

[0012] As a preferred solution of the present invention, the positioning component includes two positioning seats distributed front and back fixedly installed on the surface of the U-shaped clamping frame. The positioning seats are located at one end of the triangular sliding table away from the torsion horizontal shaft. Positioning bent rods are slidably installed inside the positioning seats. The positioning bent rods movably penetrate through the top and the bottom of the positioning seats. At the bottom of the positioning bent rod, an insertion rod is fixedly installed. At the left end and the right end of the top of the detection table, two positioning holes distributed front and back are opened. The positions of the positioning holes correspond to the positions of the insertion rods one by one, and the insertion rod is movably inserted into the positioning hole at the corresponding position. Among them, on one side surface of the two tensioning seats located at the lower part close to the positioning bent rod, wedge force blocks are fixedly installed, and the wedge force blocks are adapted to the positioning bent rod.

[0013] As a preferred solution of the present invention, thread threads are opened on the inner wall of the adjustment hole. The outer wall of the threaded column and the thread threads on the inner wall of the adjustment hole are connected by thread fit. A fastening nut is screwed on the periphery of the threaded column.

[0014] As a preferred embodiment of the present invention, a follower ring is fixedly installed on the outer wall of the torsion horizontal shaft. The follower ring is located on the side of the pickup turntable away from the U-shaped clamping frame. A torsion spring is sleeved around the periphery of the torsion horizontal shaft. The torsion spring is located on the side of the follower ring away from the U-shaped clamping frame, and the torsion spring is fixedly installed between the inner side surfaces of the follower ring and the side surround base.

[0015] As a preferred embodiment of the present invention, a spring support is fixedly installed on the outer wall of one end of the derivation slide column close to the tensioning seat. A return spring is sleeved around the periphery of the derivation slide column. The return spring is located on the side surface of the spring support away from the tensioning seat, and the return spring is fixedly installed between the spring support and one inner wall of the U-shaped clamping frame.

[0016] As a preferred embodiment of the present invention, a hydraulic jack is fixedly installed in the middle of the top of the inspection table. A lifting support plate is fixedly installed on the top of the output rod of the hydraulic jack. The lifting support plate is located between the two torsion detection components on the left and right.

[0017] A detection method for a concrete strength detection device includes the following usage steps:

[0018] S1. Place the concrete slab to be detected on the top of the lifting support plate, and adjust the height of the lifting support plate and the concrete slab by extending and retracting the output rod of the hydraulic jack downward to ensure that the concrete slab is located inside the two U-shaped clamping frames on the left and right, and at the same time, the concrete slab is located between the two upper and lower clamping domes inside each U-shaped clamping frame.

[0019] S2. Start the two front and rear hydraulic cylinders located at the left end of the top of the inspection table and the two front and rear hydraulic cylinders located at the right end of the top of the inspection table respectively. The output rods of the front and rear two hydraulic cylinders move independently. Make one of the output rods of the front and rear two hydraulic cylinders extend and the other retract. Under the connection action of the two pin shafts, push the pickup turntable and the path circular cam to rotate around the outer wall of the torsion horizontal shaft. And under the independent push of their respective hydraulic cylinders, the two pickup turntables on the left and right cause the two pickup turntables on the left and right together with the path circular cam to rotate in the opposite direction. When the path circular cam rotates, its flange pushes the derivation slide column to move along the guide hole in the direction close to the tensioning seat, and pushes the tensioning seat to move along the wedge surface of the triangular slide, so that the upper and lower clamping domes gradually approach each other until the upper and lower clamping domes clamp the concrete slab up and down.

[0020] S3. When the tensioning seat slides along the wedge surface of the triangular slide, it will drive the wedge force block to move together. And when the clamping dome is in close contact with the concrete slab surface, the wedge force generated by the contact between the wedge surface of the wedge force block and the top of the positioning bent rod pushes the positioning bent rod upward along the positioning seat. When the wedge force block moves upward, the insertion rod is pulled out from the top of the positioning hole.

[0021] S4. Continue to start the hydraulic cylinder. The two pick-up turntables on the left and right, together with the path circle cam, continue to rotate in opposite directions. Due to the tight contact between the clamping dome and the concrete slab surface, the clamping dome will not continue to move. The tensioning seat is stationary relative to the triangular slide, and the derivation slide is stationary relative to the inner wall of the guide hole. At this time, the end of the derivation slide is still located inside the flange recess of the path circle cam. Therefore, the axial thrust exerted by the path circle cam on the derivation slide will not continue to push the derivation slide along the inner wall of the guide hole. Instead, the flange recess wall of the path circle cam will continue to exert a thrust along the radial direction of the derivation slide and transmit it to the U-shaped clamping frame through the guide hole, causing the U-shaped clamping frame and the torsion horizontal shaft to generate a torsional force along the side surround base and transmit it to the concrete slab through each clamping dome. Since the rotation directions of the two pick-up turntables on the left and right are opposite, the transmission directions of the torsional force on the U-shaped clamping frame together with the clamping dome are also opposite, thereby applying torsion to the left and right of the concrete slab to detect the anti-torsion effect of the concrete slab.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. In the present invention, the concrete slab is fixed and limited by the clamping action of the two clamping domes above and below. By making the two U-shaped clamping frames on the left and right rotate in opposite directions along the transfer position of the torsion horizontal shaft and the side surround base, torsion is applied to the concrete slab in the left and right directions to detect the anti-torsion effect of the concrete slab.

[0024] 2. In the present invention, through two front and rear hydraulic cylinders, and the output rods of the two front and rear hydraulic cylinders move independently. One output rod of the two front and rear hydraulic cylinders extends, and the other retracts. Under the connection action of two pin shafts, the pick-up turntable and the path circle cam are pushed to rotate around the outer wall of the torsion horizontal shaft. And under the independent push of their respective hydraulic cylinders, the two pick-up turntables on the left and right cause the two pick-up turntables on the left and right, together with the path circle cam, to rotate in opposite directions. When the path circle cam rotates, its flange pushes the derivation slide to move along the guide hole towards the direction close to the tensioning seat, and pushes the tensioning seat to move along the wedge surface of the triangular slide, causing the upper and lower clamping domes to gradually approach each other, automatically clamping the concrete slab from top to bottom without manual fixation, improving the convenience of detection.

[0025] 3. In the present invention, during the period when the output rod of the hydraulic cylinder acts on the pickup turntable to rotate and the clamping dome clamps and limits the concrete slab, by inserting the insertion rod into the positioning hole, the U-shaped clamping frame can be prevented from twisting, thereby avoiding the concrete slab from falling off. However, when the tensioning seat slides along the inclined plane of the triangular slide, it will drive the wedge force block to move together. And when the clamping dome is in close contact with the concrete slab surface, the wedge force generated by the contact between the inclined plane of the wedge force block and the top of the positioning bent rod will push the positioning bent rod upward along the positioning seat. When the wedge force block moves upward, the insertion rod is pulled out from the top of the positioning hole. At this time, the U-shaped clamping frame is no longer limited from twisting by the insertion and positioning of the insertion rod in the positioning hole, so it will not interfere with the subsequent torsion of the U-shaped clamping frame to detect the anti-torsion performance of the concrete slab. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the present invention;

[0027] Figure 2 In the present invention Figure 1 is a partial structural schematic diagram;

[0028] Figure 3 is a schematic structural diagram of the torsion detection component in the present invention;

[0029] Figure 4 is a schematic structural diagram of the automatic pickup component in the present invention Figure 1 ;

[0030] Figure 5 is a schematic structural diagram of the automatic pickup component in the present invention Figure 2 ;

[0031] Figure 6 is a detailed structural schematic diagram of the torsion detection component in the present invention;

[0032] Figure 7 In the present invention Figure 6 is an enlarged structural schematic diagram of part A;

[0033] Figure 8 is a schematic structural diagram of the positioning component in the present invention;

[0034] Figure 9 In the present invention Figure 8 is an enlarged structural schematic diagram of part B;

[0035] Figure 10 is a sectional structural schematic diagram of the chute and the tensioning seat in the present invention.

[0036] In the figure: 1. Detection table; 101. Side surround base; 102. Positioning hole; 201. Torsion horizontal shaft; 202. U-shaped clamping bracket; 203. Triangular slide; 204. Chute; 205. Slide block; 206. Tensioning seat; 207. Adjusting hole; 208. Threaded column; 209. Clamping dome; 2010. Guide hole; 2011. Follow-up ring; 2012. Torsion spring; 301. Pick-up turntable; 302. Path circular cam; 303. Deduction slide; 304. Spring support; 305. Return spring; 306. Pin shaft; 307. Hydraulic cylinder; 401. Positioning seat; 402. Positioning bent bar; 403. Plug rod; 404. Wedge force block; 5. Hydraulic jack; 6. Lifting support plate. Detailed implementation manners

[0037] 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.

[0038] Please refer to Figure 1 - Figure 10 , the technical solutions provided by the present invention specifically include the following embodiments:

[0039] Embodiment 1, a concrete strength detection device, including a detection table 1, a torsion detection component is rotatably provided on the top of the detection table 1, and the torsion detection component is used for the anti-torsion detection of a concrete slab. The torsion detection component includes two torsion horizontal shafts 201 distributed left and right. Two side surround bases 101 distributed left and right are fixedly installed on the top of the detection table 1. Both of the two torsion horizontal shafts 201 are rotatably installed inside the two side surround bases 101 through bearings respectively. U-shaped clamping brackets 202 are fixedly installed at the closer ends of the two torsion horizontal shafts 201. Two triangular slides 203 distributed front and back are fixedly installed on the top wall and the bottom wall of the U-shaped clamping bracket 202. Chutes 204 are opened on the inclined surfaces of the triangular slides 203. Slide blocks 205 are slidably installed inside the chutes 204. Tensioning seats 206 are fixedly installed on the side surfaces of the slide blocks 205 away from the triangular slides 203. Adjusting holes 207 are opened on the side surfaces of the tensioning seats 206 away from the slide blocks 205. Threaded columns 208 are provided inside the adjusting holes 207. Clamping domes 209 are fixedly installed at the ends of the threaded columns 208 away from the adjusting holes 207;

[0040] A hydraulic jack 5 is fixedly installed in the middle of the top of the detection table 1. A lifting support plate 6 is fixedly installed at the top of the output rod of the hydraulic jack 5. The lifting support plate 6 is located between the two torsion detection components on the left and right;

[0041] Specifically, the concrete slab to be tested is placed on the top of the lifting pallet 6, and the height of the lifting pallet 6 and the concrete slab is adjusted by extending and retracting the output rod of the hydraulic jack 5 downward to ensure that the concrete slab is located inside the left and right U-shaped clamping frames 202. At the same time, the concrete slab is located between the two upper and lower clamping domes 209 inside each U-shaped clamping frame 202. The upper and lower clamping domes 209 clamp the concrete slab up and down to fix the concrete slab in position. The left and right U-shaped clamping frames 202 are rotated in opposite directions along the transfer position of the torsion horizontal axis 201 and the side enclosure base 101, so that the concrete slab is twisted in the left and right directions, and the torsion resistance of the concrete slab is tested.

[0042] Furthermore, the inner wall of the adjustment hole 207 is provided with threaded threads, and the outer wall of the threaded column 208 is connected to the threaded threads on the inner wall of the adjustment hole 207 by threaded cooperation. The outer thread of the threaded column 208 is screwed with a fastening nut. Through the threaded connection between the threaded column 208 and the adjustment hole 207, the position of the clamping dome 209 can be adjusted by rotating the threaded column 208, which is convenient for clamping concrete slabs of different thicknesses and improving the detection range of the lifting device. At the same time, after the position of the clamping dome 209 is adjusted, the threaded connection between the fastening nut and the threaded column 208 can be used to make the end face of the fastening nut tightly attached to the surface of the tensioning seat 206, thereby preventing the threaded column 208 from loosening and unnecessary movement.

[0043] Furthermore, a follower ring 2011 is fixedly installed on the outer wall of the torsion horizontal shaft 201, and the follower ring 2011 is located on the side of the picking turntable 301 away from the U-shaped clamping frame 202. A torsion spring 2012 is sleeved on the outer periphery of the torsion horizontal shaft 201, and the torsion spring 2012 is located on the side of the follower ring 2011 away from the U-shaped clamping frame 202, and the torsion spring 2012 is fixedly installed between the follower ring 2011 and the inner side surface of the side surrounding base 101. When the torsion horizontal shaft 201 rotates, the follower ring 201 is driven 1 rotates together, causing the torsion spring 2012 to be twisted and deformed, generating a rebound force, so that after the detection is completed, after the torsion force of the U-shaped clamping frame 202 and the torsion horizontal shaft 201 is cancelled, the torsion horizontal shaft 201, the U-shaped clamping frame 202 and the clamping dome 209 can be driven to rotate and reset through the resilience of the torsion spring 2012, so there is no need to manually reset the U-shaped clamping frame 202 and the clamping dome 209, so as to facilitate subsequent continued detection, thereby improving the convenience of using the device.

[0044] Embodiment 2: An automatic picking component is rotatably provided on the top of the inspection table 1. The automatic picking component is used for automatically tensioning the concrete slab. The automatic picking component includes a picking turntable 301 rotatably mounted on the outer wall of the torsion horizontal shaft 201. Path circular cams 302 are fixedly mounted on one side surface of the picking turntable 301 close to the U-shaped clamping frame 202. Four guiding holes 2010 are formed through one side surface of the U-shaped clamping frame 202 close to the path circular cam 302. The positions of the four guiding holes 2010 correspond to the positions of the triangular sliding table 203 one by one. Deducing sliding columns 303 are slidably mounted inside the guiding holes 2010. One end of each deducing sliding column 303 abuts against one side of the tensioning seat 206 at the corresponding position, and the end of the deducing sliding column 303 far from the tensioning seat 206 abuts against the flange of the path circular cam 302.

[0045] Two pin shafts 306 distributed front and back are fixedly mounted on one side surface of the picking turntable 301 far from the path circular cam 302. Hydraulic cylinders 307 are hinged to the left end and the right end of the top of the inspection table 1 respectively. The positions of the hydraulic cylinders 307 correspond to the positions of the pin shafts 306 one by one. The top of the output rod of the hydraulic cylinder 307 is hinged to the outer wall of the pin shaft 306 at the corresponding position.

[0046] Specifically in this embodiment, the concrete slab to be detected is placed on the top of the lifting support plate 6, and the output rod of the hydraulic jack 5 is extended and retracted downward to adjust the height of the lifting support plate 6 and the concrete slab, ensuring that the concrete slab is located inside the left and right U-shaped clamping frames 202, and at the same time, the concrete slab is located between the two upper and lower clamping domes 209 inside each U-shaped clamping frame 202. The two front and rear hydraulic cylinders 307 located at the left end of the top of the inspection table 1 and the two front and rear hydraulic cylinders 307 located at the right end of the top of the inspection table 1 are started respectively. The output rods of the two front and rear hydraulic cylinders 307 move independently. One of the output rods of the two front and rear hydraulic cylinders 307 extends and the other retracts. Under the connection action of the two pin shafts 306, the picking turntable 301 and the path circular cam 302 are pushed to rotate around the outer wall of the torsion horizontal shaft 201. Under the independent pushing of their respective hydraulic cylinders 307, the left and right picking turntables 301 drive the left and right path circular cams 302 to rotate in opposite directions. When the path circular cam 302 rotates, its flange pushes the deducing sliding column 303 to move along the guiding hole 2010 towards the direction close to the tensioning seat 206, and the tensioning seat 206 is pushed to move along the wedge surface of the triangular sliding table 203, so that the upper and lower clamping domes 209 gradually approach each other until the upper and lower clamping domes 209 clamp the concrete slab up and down.

[0047] Continue to start the hydraulic cylinder 307. The left and right pick-up turntables 301 and the path circle cam 302 continue to rotate in opposite directions to each other. Due to the close contact between the clamping dome 209 and the concrete slab surface, the clamping dome 209 will not continue to move. The tensioning seat 206 is stationary relative to the triangular slide 203, and the derivation slide column 303 is stationary relative to the inner wall of the guide hole 2010. At this time, the end of the derivation slide column 303 is still located inside the flange recess of the path circle cam 302. Therefore, the axial thrust exerted by the path circle cam 302 on the derivation slide column 303 will not continue to push the derivation slide column 303 to slide along the inner wall of the guide hole 2010. However, the flange recess wall of the path circle cam 302 will continue to exert a thrust along the radial direction of the derivation slide column 303 and transmit it to the U-shaped clamping bracket 202 through the guide hole 2010, causing the U-shaped clamping bracket 202 and the torsion horizontal shaft 201 to generate a torsional force along the side wall base 101 and transmit it to the concrete slab through each clamping dome 209. Since the rotation directions of the left and right pick-up turntables 301 are opposite, the transmission directions of the torsional forces on the U-shaped clamping bracket 202 and the clamping dome 209 are also opposite, thereby applying torsional forces to the left and right sides of the concrete slab to detect the anti-torsion effect of the concrete slab.

[0048] Further, a spring support 304 is fixedly installed on the outer wall of the end of the derivation slide column 303 close to the tensioning seat 206. A return spring 305 is sleeved around the derivation slide column 303. The return spring 305 is located on the side surface of the spring support 304 away from the tensioning seat 206, and the return spring 305 is fixedly installed between the spring support 304 and the inner wall of one side of the U-shaped clamping bracket 202. When the path circle cam 302 rotates and the derivation slide column 303 moves along the guide hole 2010, it will drive the spring support 304 fixed on the outer wall of the derivation slide column 303 to move together, causing the return spring 305 to be stretched and store energy. Therefore, after the detection, when the path circle cam 302 rotates in reverse, the path circle cam 302 releases the thrust on the derivation slide column 303, and the resilience of the return spring 305 will drive the spring support 304 and the derivation slide column 303 to slide and reset along the inner wall of the guide hole 2010, waiting for the next detection.

[0049] Embodiment 3. A positioning component is movably arranged on the top of the inspection table 1. The positioning component is used for limiting the torque of the torque detection component. The positioning component includes two positioning seats 401 arranged front and back on the surface of the U-shaped clamping frame 202. The positioning seats 401 are located at one end of the triangular slide table 203 away from the torsion horizontal shaft 201. A positioning bent rod 402 is slidably installed inside each positioning seat 401. The positioning bent rod 402 movably penetrates through the top and bottom of the positioning seat 401. A plug rod 403 is fixedly installed at the bottom of the positioning bent rod 402. Two positioning holes 102 are respectively formed at the left end and the right end of the top of the inspection table 1 and are arranged front and back. The positions of the positioning holes 102 correspond to the positions of the plug rods 403 one by one, and the plug rods 403 are movably inserted into the positioning holes 102 at the corresponding positions. Wedge force blocks 404 are fixedly installed on one side surface of the two lower tension seats 206 close to the positioning bent rod 402. The wedge force blocks 404 are adapted to the positioning bent rod 402;

[0050] Specifically in this embodiment, when the output rod of the hydraulic cylinder 307 acts on the pickup turntable 301 to rotate, clamping and limiting the concrete slab by the clamping dome 209, by inserting the plug rod 403 into the positioning hole 102, the U-shaped clamping frame 202 can be prevented from twisting, thereby avoiding the concrete slab from falling off. However, when the tension seat 206 slides along the wedge surface of the triangular slide table 203, the wedge force block 404 will be driven to move together. And when the clamping dome 209 is in close contact with the concrete slab surface, the wedge force generated by the contact between the wedge surface of the wedge force block 404 and the top of the positioning bent rod 402 pushes the positioning bent rod 402 upward along the positioning seat 401. The wedge force block 404 moves upward and pulls out the plug rod 403 from the top of the positioning hole 102. At this time, the U-shaped clamping frame 202 is no longer limited by the insertion and limitation of the plug rod 403 and the positioning hole 102, and thus will not interfere with the subsequent torsional test of the concrete slab by the torsion of the U-shaped clamping frame 202.

[0051] A detection method of a concrete strength detection device includes the following use steps:

[0052] S1. Place the concrete slab to be detected on the top of the lifting support plate 6, and adjust the height of the lifting support plate 6 and the concrete slab by the telescopic movement of the output rod of the hydraulic jack 5 to ensure that the concrete slab is located inside the left and right U-shaped clamping frames 202, and at the same time, the concrete slab is located between the two upper and lower clamping domes 209 inside each U-shaped clamping frame 202;

[0053] S2. Start the two front and rear hydraulic cylinders 307 located at the left end of the top of the inspection table 1 and the two front and rear hydraulic cylinders 307 located at the right end of the top of the inspection table 1 respectively. And the output rods of the two front and rear hydraulic cylinders 307 move independently. One output rod of the two front and rear hydraulic cylinders 307 extends, and the other retracts. And under the connection action of the two pin shafts 306, the pickup turntable 301 and the path circle cam 302 are pushed to rotate around the outer wall of the torsion horizontal shaft 201. And the two pickup turntables 301 on the left and right rotate in opposite directions under the independent push of their respective hydraulic cylinders 307. When the path circle cam 302 rotates, its flange pushes the derivation slide column 303 to move along the guide hole 2010 towards the direction close to the tensioning seat 206, and pushes the tensioning seat 206 to move along the wedge surface of the triangular slide table 203, so that the upper and lower clamping domes 209 gradually approach each other until the upper and lower clamping domes 209 clamp the concrete slab up and down;

[0054] S3. When the tensioning seat 206 slides along the wedge surface of the triangular slide table 203, it will drive the wedge force block 404 to move together. And when the clamping dome 209 is in close contact with the concrete slab surface, the wedge force generated by the contact between the wedge surface of the wedge force block 404 and the top of the positioning bent rod 402 will push the positioning bent rod 402 upward along the positioning seat 401. When the wedge force block 404 moves upward, the insertion rod 403 is pulled out from the top of the positioning hole 102;

[0055] S4. Continue to start the hydraulic cylinder 307. The two pickup turntables 301 on the left and right and the path circle cam 302 continue to rotate in opposite directions to each other. And due to the close contact between the clamping dome 209 and the concrete slab surface, the clamping dome 209 will not continue to move. The tensioning seat 206 is stationary relative to the triangular slide table 203, and the derivation slide column 303 is stationary relative to the inner wall of the guide hole 2010. At this time, the end of the derivation slide column 303 is still located in the flange recess of the path circle cam 302. Therefore, the axial thrust exerted by the path circle cam 302 on the derivation slide column 303 will not continue to push the derivation slide column 303 to slide along the inner wall of the guide hole 2010. And the flange concave wall of the path circle cam 302 will continue to exert a thrust along the radial direction of the derivation slide column 303 on the derivation slide column 303 and transmit it to the U-shaped clamping bracket 202 through the guide hole 2010, so that the U-shaped clamping bracket 202 and the torsion horizontal shaft 201 generate a torsional force along the side wall base 101 and transmit it to the concrete slab through each clamping dome 209. And because the two pickup turntables 301 on the left and right rotate in opposite directions, the direction of the torsional force transmitted to the U-shaped clamping bracket 202 together with the clamping dome 209 is also opposite, so as to apply torsion to the left and right of the concrete slab and detect the anti-torsion effect of the concrete slab.

[0056] When a concrete strength detection device of this solution is working, the concrete slab to be detected is placed on the top of the lifting support plate 6, and the output rod of the hydraulic jack 5 is telescoped downward to adjust the height of the lifting support plate 6 and the concrete slab, ensuring that the concrete slab is located inside the two U-shaped clamping frames 202 on the left and right, and at the same time the concrete slab is located between the two upper and lower clamping domes 209 inside each U-shaped clamping frame 202;

[0057] Start the two front and rear hydraulic cylinders 307 located at the left end of the top of the detection table 1 and the two front and rear hydraulic cylinders 307 located at the right end of the top of the detection table 1 respectively, and the output rods of the front and rear two hydraulic cylinders 307 move independently. One of the output rods of the front and rear two hydraulic cylinders 307 extends, and the other retracts. Under the connection action of the two pin shafts 306, the pickup turntable 301 and the path circular cam 302 are pushed to rotate around the outer wall of the torsion horizontal shaft 201. And under the independent push of their respective hydraulic cylinders 307, the two pickup turntables 301 on the left and right cause the two pickup turntables 301 on the left and right together with the path circular cam 302 to rotate in the opposite direction. When the path circular cam 302 rotates, its flange pushes the derivation slide column 303 to move along the guide hole 2010 towards the direction close to the tensioning seat 206, and pushes the tensioning seat 206 to move along the wedge surface of the triangular slide table 203, so that the upper and lower clamping domes 209 gradually approach each other until the upper and lower clamping domes 209 clamp the concrete slab up and down;

[0058] When the tensioning seat 206 slides along the wedge surface of the triangular slide table 203, it will drive the wedge force block 404 to move together. And when the clamping dome 209 is in close contact with the concrete slab surface, the wedge force generated by the contact between the wedge surface of the wedge force block 404 and the top of the positioning bent rod 402 pushes the positioning bent rod 402 upward along the positioning seat 401. When the wedge force block 404 moves upward, the insertion rod 403 is pulled out from the top of the positioning hole 102;

[0059] Continue to start the hydraulic cylinder 307, and the left and right pick-up turntables 301 together with the path circular cam 302 continue to rotate in opposite directions to each other. Due to the close contact between the clamping dome 209 and the concrete slab surface, the clamping dome 209 will not continue to move, the tensioning seat 206 is stationary relative to the triangular slide 203, and the derivation slide column 303 is stationary relative to the inner wall of the guide hole 2010. At this time, the end of the derivation slide column 303 is still located inside the flange recess of the path circular cam 302. Therefore, the axial thrust exerted by the path circular cam 302 on the derivation slide column 303 will not continue to push the derivation slide column 303 to slide along the inner wall of the guide hole 2010. However, the flange recess wall of the path circular cam 302 will continue to exert a thrust along the radial direction of the derivation slide column 303 and transmit it to the U-shaped clamping bracket 202 through the guide hole 2010, causing the U-shaped clamping bracket 202 and the torsion horizontal shaft 201 to generate a torsional force along the side wall base 101 and transmit it to the concrete slab through each clamping dome 209. Since the rotation directions of the left and right pick-up turntables 301 are opposite, the transmission directions of the torsional forces on the U-shaped clamping bracket 202 together with the clamping dome 209 are also opposite, thereby applying torsional forces to the left and right sides of the concrete slab to detect the anti-torsion effect of the concrete slab.

[0060] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A concrete strength detection device, characterized in that: The invention comprises a testing platform (1); A torque detection component, the top of the detection platform (1) is rotatably provided with a torque detection component, and the torque detection component is used for anti-torque detection of the concrete slab; An automatic picking component, the top of the inspection platform (1) is rotatably provided with an automatic picking component, the automatic picking component is used for automatic tensioning of the concrete slab; A positioning component, wherein the top of the detection platform (1) is movably provided with a positioning component, and the positioning component is used to limit the torque of the torque detection component; The torque detection component comprises two torsion horizontal shafts (201) distributed on the left and right, two side enclosure bases (101) distributed on the left and right are fixedly installed on the top of the detection platform (1), the two torsion horizontal shafts (201) are rotatably installed inside the two side enclosure bases (101) through bearings, and a U-shaped clamping frame (202) is fixed on the ends of the two torsion horizontal shafts (201) that are close to each other, and two triangular slides (203) distributed front and back are fixedly installed on the top wall and the bottom wall of the U-shaped clamping frame (202). The wedge surface of (203) is provided with a slide groove (204), and a slider (205) is slidably installed inside the slide groove (204). A tensioning seat (206) is fixedly installed on the side of the slider (205) away from the triangular slide (203), and an adjustment hole (207) is provided on the side of the tensioning seat (206) away from the slider (205). A threaded column (208) is provided inside the adjustment hole (207), and a clamping dome (209) is fixedly installed on the end of the threaded column (208) away from the adjustment hole (207).

2. A concrete strength detection device according to claim 1, characterized in that: The automatic picking component comprises a picking turntable (301) rotatably mounted on the outer wall of the torsion horizontal shaft (201); a path circular cam (302) is fixedly mounted on one side of the picking turntable (301) close to the U-shaped clamping frame (202); four guide holes (2010) are penetrated through one side of the U-shaped clamping frame (202) close to the path circular cam (302); the positions of the four guide holes (2010) correspond to the positions of the triangular slide (203); guide slide columns (303) are slidably mounted inside the guide holes (2010); one end of the guide slide column (303) abuts against one side of the tensioning seat (206) at the corresponding position, and the end of the guide slide column (303) away from the tensioning seat (206) abuts against the flange of the path circular cam (302).

3. A concrete strength detection device according to claim 2, characterized in that: Two pins (306) distributed front and rear are fixedly mounted on a side of the picking turntable (301) away from the path circular cam (302), and a hydraulic cylinder (307) is hingedly connected to the top left end and the top right end of the detection platform (1), the position of the hydraulic cylinder (307) corresponds to the position of the pin (306) one by one, and the top of the output rod of the hydraulic cylinder (307) is hingedly connected to the outer wall of the pin (306) at the corresponding position.

4. A concrete strength detection device according to claim 3, characterized in that: The positioning component comprises two positioning seats (401) fixedly mounted on the surface of the U-shaped clamping frame (202) and distributed front and back. The positioning seat (401) is located at one end of the triangular slide (203) away from the torsion horizontal shaft (201). A positioning bent rod (402) is slidably mounted inside each of the positioning seats (401). The positioning bent rod (402) movably passes through the top and bottom of the positioning seat (401). An insertion rod (403) is fixedly mounted on the bottom of the positioning bent rod (402). The top left end and the top right end of the test platform (1) are each provided with two positioning holes (102) distributed front to back, the positions of the positioning holes (102) corresponding to the positions of the insertion rods (403) one by one, and the insertion rods (403) are movably inserted into the positioning holes (102) at corresponding positions, wherein the two tensioning seats (206) at the lower part are both fixedly mounted with wedge force blocks (404) on one side close to the positioning bent rod (402), and the wedge force blocks (404) are adapted to the positioning bent rod (402).

5. A concrete strength detection device according to claim 4, characterized in that: The inner wall of the adjustment hole (207) is provided with threaded threads, the outer wall of the threaded column (208) is connected to the threaded threads of the inner wall of the adjustment hole (207) through threaded matching, and the outer thread of the threaded column (208) is screwed with a fastening nut.

6. A concrete strength detection device according to claim 5, characterized in that: A follower ring (2011) is fixedly mounted on the outer wall of the torsion horizontal shaft (201), and the follower ring (2011) is located on a side of the picking turntable (301) away from the U-shaped clamping frame (202). A torsion spring (2012) is sleeved on the outer periphery of the torsion horizontal shaft (201), and the torsion spring (2012) is located on a side of the follower ring (2011) away from the U-shaped clamping frame (202), and the torsion spring (2012) is fixedly mounted between the follower ring (2011) and the inner side surface of the side enclosure base (101).

7. A concrete strength detection device according to claim 6, characterized in that: A spring holder (304) is fixedly mounted on the outer wall of one end of the derivation slide column (303) close to the tensioning seat (206), and a return spring (305) is sleeved on the outer periphery of the derivation slide column (303). The return spring (305) is located on a side of the spring holder (304) away from the tensioning seat (206), and the return spring (305) is fixedly mounted between the spring holder (304) and an inner wall of one side of the U-shaped clamping frame (202).

8. A concrete strength detection device according to claim 7, characterized in that: A hydraulic jack (5) is fixedly mounted in the middle of the top of the detection platform (1), and a lifting support plate (6) is fixedly mounted on the top of the output rod of the hydraulic jack (5), wherein the lifting support plate (6) is located between the left and right torque detection components.

9. A detection method for a concrete strength detection device according to claim 8, characterized in that: The usage steps include the following: S1, by placing the concrete slab to be tested on the top of the lifting support plate (6), and adjusting the height of the lifting support plate (6) and the concrete slab by extending and retracting the output rod of the hydraulic jack (5) downward, to ensure that the concrete slab is located inside the left and right U-shaped clamping frames (202), and the concrete slab is located between the two upper and lower clamping domes (209) inside each U-shaped clamping frame (202); S2, respectively start the two front and rear hydraulic cylinders (307) located at the left end of the top of the test platform (1) and the two front and rear hydraulic cylinders (307) located at the right end of the top of the test platform (1), and the output rods of the two front and rear hydraulic cylinders (307) move independently, so that one of the output rods of the two front and rear hydraulic cylinders (307) extends and the other retracts, and the pick-up turntable (301) and the path circular cam (302) are pushed to rotate around the outer wall of the torsion horizontal shaft (201) under the connection of the two pins (306), and the two left and right pick-up turntables (301) and the path circular cam (302) are pushed to rotate around the outer wall of the torsion horizontal shaft (201 ...) under the connection of the two pins (306). The disks (301) are independently pushed by their respective hydraulic cylinders (307), causing the left and right pick-up turntables (301) and the path circular cam (302) to rotate in opposite directions. The path circular cam (302) rotates, and its flange pushes the guide slide (303) to move along the guide hole (2010) toward the tensioning seat (206), pushing the tensioning seat (206) to move along the wedge surface of the triangular slide (203), so that the upper and lower clamping domes (209) gradually move toward the middle until the upper and lower clamping domes (209) clamp the concrete slab up and down; S3, when the tensioning seat (206) slides along the wedge surface of the triangular slide (203), the wedge force block (404) is driven to move together, and when the clamping dome (209) is in close contact with the concrete slab surface, the wedge force generated by the contact between the wedge surface of the wedge force block (404) and the top of the positioning bent rod (402) pushes the positioning bent rod (402) upward along the positioning seat (401), and the wedge force block (404) moves upward to pull the insertion rod (403) out of the top of the positioning hole (102); S4, continue to start the hydraulic cylinder (307), the left and right pick-up turntables (301) together with the path circular cam (302) continue to rotate in opposite directions, and due to the close contact between the clamping dome (209) and the concrete slab surface, the clamping dome (209) will not continue to move, the tensioning seat (206) is stationary relative to the triangular slide (203), and the derivation slide column (303) is stationary relative to the inner wall of the guide hole (2010). At this time, the end of the derivation slide column (303) is still located inside the flange concave of the path circular cam (302), so the axial thrust applied by the path circular cam (302) to the derivation slide column (303) will not continue to push the derivation slide column (303) along the guide hole (2010) The inner wall slides, and the concave wall of the flange of the path circular cam (302) continues to apply a thrust along the radial direction of the guide slide column (303) to the guide slide column (303), and transmits it to the U-shaped clamping frame (202) through the guide hole (2010), so that the U-shaped clamping frame (202) and the torsion horizontal shaft (201) generate a torsional force along the side enclosure base (101), and transmit it to the concrete slab through each clamping dome (209). Since the left and right picking turntables (301) rotate in opposite directions, the torsional force transmission direction of the U-shaped clamping frame (202) and the clamping dome (209) is also opposite, so that torsional force is applied to the left and right sides of the concrete slab, and the torsional resistance effect of the concrete slab is tested.

Images