Concrete strength detection device for house building construction

Abstract

The invention relates to a concrete strength detection device for house building construction, and the device comprises a detection hammer which is provided with a plurality of inertia rods which are hinged to the peripheral side of the lower part of the detection hammer; the air nozzle is arranged on the side, away from the detection hammer, of the inertia rod, and when the detection hammer makes contact with the to-be-detected concrete plate and the inertia rod is overturned to the free end to make contact with the concrete plate, the air spraying direction of the air nozzle obliquely points to the detection point position where the detection hammer makes contact with the concrete plate; a plurality of air pipes which are respectively connected with the plurality of air nozzles one by one are connected onto the compression inflating part; the rack is slidably arranged on the detection hammer, and the upper end of the rack corresponds to the compression inflation part; and the overturning gear is fixedly connected to the hinged end of the inertia rod and is in meshed connection with the rack. When the concrete slab is impacted by the detection hammer, the inertia rod is overturned until the air nozzle points to the detection point position, and the compression inflation piece is compressed and inflates the air nozzle, so that disintegrating slag at the detection point position can be automatically cleaned, and even if the detection point position is replaced, the automatic cleaning process can be automatically executed.

Description

Technical Field

[0001] The present application relates to the technical field of concrete strength detection, and in particular to a concrete strength detection device for building construction. Background Art

[0002] Concrete is the most important material for construction projects and determines the quality of the project. Strength is the basis for determining other properties of concrete and is the most important property of concrete. At present, in the process of concrete slab strength testing, the concrete slab is punched by a testing hammer to detect the damage of the concrete slab when it is stressed. In the traditional concrete slab testing process, the position of the testing point between the testing hammer and the concrete slab remains unchanged, so the stress point of the concrete slab remains unchanged during the concrete slab testing process, which in turn causes the concrete slab strength testing range to be fixed, resulting in a single floor slab testing data and unrepresentative floor slab strength test results.

[0003] At present, in the process of concrete slab strength testing, a steel wire rope is generally wound on a winding wheel, and a testing hammer is mounted on the steel wire rope. The testing hammer is used to impact the concrete slab with its own weight in free fall. A counterweight can also be loaded on the testing hammer to adjust the impact energy on the concrete slab.

[0004] In actual testing, the same test point is usually impacted multiple times, and then repeated testing is carried out at different points to obtain accurate strength test data. However, after multiple tests at the same point, the debris generated by the test hammer impacting the concrete slab will affect the next impact of the test hammer at the same point, weakening part of the impact energy, or causing the test hammer to deflect or dislocate, affecting the accuracy of the test data. Summary of the invention

[0005] In order to improve the problem that the debris generated by the impact of a detection hammer on a concrete slab will affect the strength detection data of the concrete slab, the present application provides a concrete strength detection device for building construction.

[0006] The present application provides a concrete strength detection device for building construction using the following technical solution: A concrete strength testing device for building construction, comprising a testing platform, a winding wheel, a steel wire rope and a testing hammer, wherein the testing hammer is provided with: Inertia rods, provided with a plurality of them and hinged to the circumference of the lower part of the detection hammer; An air jet nozzle is arranged on a side of the inertia rod away from the detection hammer, and when the detection hammer contacts the concrete slab to be tested and the inertia rod is turned over to the free end to contact the concrete slab, the air jet direction of the air jet nozzle is obliquely directed to the detection point where the detection hammer contacts the concrete slab; A compression inflatable component, on which a plurality of air pipes are connected one by one with a plurality of air nozzles, and when compressed, the air pipes are inflated, and when no external force is applied, the compression inflatable component can be freely restored and inhaled; A rack is slidably disposed on the detection hammer along the axial direction of the detection hammer, and an upper end of the rack corresponds to the compressible portion of the compressed inflatable member; and The flipping gear is fixed to the hinged end of the inertia rod and meshed with the rack. When the inertia rod flips in a direction away from the detection hammer, the rack moves up and squeezes the compressed inflatable piece.

[0007] Furthermore, the detection hammer is also provided with: A receiving groove, used for receiving the compressed inflatable member; The extrusion rod is slidably arranged in the accommodating groove, and the rack is fixedly connected to the peripheral side of the extrusion rod.

[0008] Furthermore, if the number of the plurality of tracheas is an odd number, the lengths of the plurality of tracheas are not the same; If the number of the plurality of air tubes is an even number, the lengths of at least two air tubes that are arranged opposite to each other are inconsistent.

[0009] Furthermore, a counterweight head is fixedly connected to the free end of the inertia rod; when the free end of the inertia rod is completely in contact with the detection hammer, the angle between the length direction of the inertia rod and the axis of the detection hammer is an acute angle.

[0010] Furthermore, the inertia rod is in an arc shape as a whole and its outer arc side is arranged close to the detection hammer, and the air jet nozzle is installed at the arc top of the inner arc side of the inertia rod.

[0011] Furthermore, an adsorption member is provided between the outer arc side of the inertia rod and the detection hammer, and the adsorption force of the adsorption member on the two is smaller than the overturning inertia force of the counterweight head.

[0012] Furthermore, an ink sac is arranged on the counterweight head, and an ink outlet micro-hole communicating with the ink sac is provided on a side of the counterweight head away from the detection hammer; When the detection hammer contacts the concrete slab to be tested and the inertia rod flips to the free end to contact the concrete slab, the ink outlet micropores are vertically aligned with the concrete slab.

[0013] Furthermore, the counterweight head is provided with a cushioning rubber pad protruding from the periphery of the ink outlet micro-hole.

[0014] Furthermore, a plurality of guide rings are fixedly connected to the circumferential side of the upper part of the detection hammer, a lifting rope with the other end passing through the guide ring is fixedly connected to the free end of the inertia rod, and the plurality of inertia rods are distributed in a circular array with equal spacing around the axis of the detection hammer, and a plurality of lifting ropes are commonly fixedly connected to a wire hub at the upper ends thereof, and the wire hub is connected to the lower end of the wire rope; When the detection hammer contacts the concrete slab to be measured and the inertia rod flips until the free end contacts the concrete slab, the wire collecting head does not contact the upper part of the detection hammer.

[0015] Furthermore, a two-axis robotic arm and a clamping mechanism for clamping the concrete slab to be measured are provided on the detection table. A detection seat is fixedly connected to the output end of the two-axis robotic arm. The winding wheel is installed on the detection seat. A plurality of sliding rods are vertically fixedly connected to the lower end surface of the detection seat. Ball sliding sleeves are slidably sleeved on the sliding rods. A load-bearing platform is fixedly connected between the detection hammer and the plurality of ball sliding sleeves. The hoisting rope penetrates through the load-bearing platform.

[0016] In summary, the beneficial technical effects of this application are as follows: 1. By providing an inertia rod and a counterweight on the detection hammer, when the detection hammer impacts the concrete slab, on the one hand, the detection hammer will bounce up for a certain period of time; on the other hand, the inertia rod will flip downward until the counterweight impacts the concrete slab at the moment of impact, which can quickly move the rack upward and compress the compressed air member, so that a plurality of air nozzles spray high-speed air currents toward the cleaning gap from the circumferential side of the cleaning gap after the detection hammer bounces up, which can blow the crushed slag impacted at the detection point on the concrete slab away from the detection point, ensuring that the detection hammer will not be affected by the impact crushed slag during the next detection, resulting in inaccurate detection results. 2. After a detection point is detected, the two-axis robotic arm can drive the detection seat and the detection hammer thereon to move to the next detection point. Thus, every time the detection hammer impacts, a plurality of air nozzles can follow the detection hammer to blow and clean the corresponding detection point, without the need to set up an additional air source and frequently change the position of the air nozzles according to different detection points, nor the need to separately set up a valve to control the opening and closing of the air current in the air nozzles, realizing the continuous and automatic high-quality detection of different detection points on the concrete slab by the detection device of this application. 3. By setting the trachea to different lengths or having throttle holes with different apertures inside, a delayed jet of a plurality of air nozzles can be formed, effectively avoiding the formation of turbulent flow in a counter-flow manner below the detection hammer, ensuring that the crushed slag can be effectively flushed out of the detection point under the impact of multiple air currents. 4. By making the jet directions of the air currents sprayed by a plurality of air nozzles tangent to different concentric circles of the cross-section of the detection hammer and having the same tangential direction, even when the opposite air nozzles spray air simultaneously, a large air current counter-flow interference will not be formed. Instead, a swirling flow will be formed at the cleaning gap, which can promote the detachment of the crushed slag below the detection hammer from the detection point. 5. By setting the inertial rod as an arc rod and arranging the jet nozzle at the top of the inner arc side, the jet direction of the jet nozzle can point to the cleaning gap at a relatively large incident angle, ensuring that the debris in the impact pit formed by the impact of the detection hammer on the concrete slab can also be flushed out by the airflow ejected from the jet nozzle. Further, by setting the inertial rod as a micro-elastic rod, after the counterweight hits the concrete slab, the middle part of the inertial rod undergoes a certain amount of flexible deformation, and then the airflow ejected from the jet nozzle swings up and down by a certain amplitude, which can also promote the debris in the impact pit to be flushed out by the swinging airflow, so as to improve the cleaning degree of the detection point. 6. By arranging an ink sac and ink outlet micropores on the counterweight, during each detection, the ink drops flowing out from multiple ink outlet micropores can form marking points on the concrete slab to determine the actual impact point of the detection hammer on the concrete slab. When conducting multiple detections at the same detection point, by relying on the coincidence degree of the marking points on the same side during different ramming operations, it can be determined whether the actual impact point of the detection hammer on the concrete slab deviates from the established detection point during this impact detection, so as to take timely disposal measures. Brief Description of the Drawings

[0017] Figure 1 is the overall structural schematic diagram of the embodiment of the present application; Figure 2 is the sectional structural schematic diagram of the embodiment of the present application; Figure 3 is the structural schematic diagram when the inertial rod of the embodiment of the present application is flipped until the counterweight contacts the concrete slab; Figure 4 is Figure 1 the partial enlarged schematic diagram of part A in Figure 5 is Figure 3 the partial enlarged schematic diagram of part B in

[0018] Description of the Reference Numerals in the Drawings: 1. Detection table; 11. Two-axis robotic arm; 12. Clamping mechanism; 21. Reel; 221. Steel wire rope; 222. Hoisting rope; 223. Wire collecting head; 23. Reel motor; 3. Detection hammer; 31. Accommodation groove; 32. Guide ring; 4. Inertial rod; 41. Counterweight; 411. Ink outlet micropore; 412. Buffer rubber pad; 42. Ink sac; 51. Jet nozzle; 52. Compressed air charging part; 61. Rack; 62. Flipping gear; 63. Extrusion rod; 71. Detection seat; 72. Slide bar; 73. Ball slide sleeve; 74. Load-bearing platform. Detailed Embodiment

[0019] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0020] The present application embodiment discloses a concrete strength detection device for building construction. Figure 1 , Figure 2 and Figure 3 It includes a testing platform 1, a winding wheel 21, a wire rope 221 and a testing hammer 3. Specifically, a two-axis mechanical arm 11 and a clamping mechanism 12 for clamping the concrete slab to be tested are arranged on the testing platform 1. A testing seat 71 is fixedly connected to the output end of the two-axis mechanical arm 11; wherein, the two-axis mechanical arm 11 can drive the testing seat 71 to move arbitrarily on the horizontal plane, and the clamping mechanism 12 can stably clamp the concrete slab. Both of these are conventional technical means and will not be repeated here.

[0021] The winding wheel 21 is rotatably mounted on the detection seat 71, and a winding motor 23 is mounted on the detection seat 71 for driving the winding wheel 21 to rotate. The winding motor 23 can be a servo motor without a reverse self-locking function, and the detection hammer 3 can be allowed to drive the wire rope 221 to fall freely after releasing the winding wheel 21. A plurality of slide bars 72 are vertically fixed to the lower end surface of the detection seat 71, and a ball sliding sleeve 73 is provided on the sliding sleeve of the slide bar 72. A bearing platform 74 is fixed between the detection hammer 3 and the plurality of ball sliding sleeves 73, and the bearing platform 74 can be used to fix the counterweight.

[0022] And, refer to Figure 1 , Figure 2 and Figure 3 , the detection hammer 3 is provided with: There are multiple inertia rods 4, and the lower ends of the inertia rods 4 are hinged to the lower peripheral side of the detection hammer 3. The multiple inertia rods 4 are distributed in an evenly spaced circular array around the axis of the detection hammer 3, and the inertia rods 4 are arranged along the axial direction of the detection hammer 3. The free end of the inertia rod 4 is fixedly connected with a counterweight head 41; when the free end of the inertia rod 4 is completely in contact with the detection hammer 3, the angle between the length direction of the inertia rod 4 and the axis of the detection hammer 3 is an acute angle.

[0023] The air jet nozzle 51 is arranged on the side of the inertia rod 4 away from the detection hammer 3. When the detection hammer 3 contacts the concrete slab to be tested and the inertia rod 4 flips to the free end to contact the concrete slab, the air jet direction of the air jet nozzle 51 points obliquely to the detection point where the detection hammer 3 contacts the concrete slab.

[0024] The compressed inflatable component 52 is connected to a plurality of air tubes (not shown in the figure) which are respectively connected to a plurality of air nozzles 51. When compressed, the compressed inflatable component inflates air into the air tubes, and can freely recover and inhale air when no external force is applied. The compressed inflatable component 52 is specifically a compressed inflatable cylinder made of plastic or a bladder and having a built-in return spring.

[0025] The rack 61 is slidably disposed on the detection hammer 3 along the axial direction of the detection hammer 3, and its upper end corresponds to the compressible portion of the compression inflatable member 52. The flipping gear 62 is fixed to the hinged end of the inertia rod 4 and meshed with the rack 61. The hinge axis of the inertia rod 4 on the detection hammer 3 is coaxially arranged with the flipping gear 62. The flipping gear 62 is specifically a dense-toothed sector gear. When the inertia rod 4 flips in the direction away from the detection hammer 3, the rack 61 moves up and squeezes the compressed inflatable part 52.

[0026] Therefore, when testing the strength of a concrete slab, the concrete slab to be tested is first placed on the testing platform 1 and fixed by the clamping mechanism 12, which can prevent the concrete slab from bouncing and shifting when the testing hammer 3 impacts the concrete slab. Then the winding motor 23 is controlled to release the wire rope 221, and the testing hammer 3 falls in a free fall under the gravity of its own weight and the counterweight block (if any) on the load-bearing platform 74; during the falling process, the ball bearing sleeve 73 on the load-bearing platform 74 slides on the slide bar 72, which not only avoids excessive impact on the falling impact force of the testing hammer 3, but also positions and prevents deviation of the impact point of the testing hammer 3, ensuring the consistency of the impact point when multiple consecutive tests are performed at the same testing point.

[0027] When the detection hammer 3 impacts the detection point on the concrete slab, since there is a certain angle between the length direction of the inertia rod 4 and the axis of the detection hammer 3, when the detection hammer 3 impacts the concrete slab, the impact reaction force is transmitted to the hinge of the inertia rod 4 on the detection hammer 3, forming a reverse torque around the hinge, and the counterweight head 41 and the inertia rod 4 produce a delayed response due to the inertia effect, causing the inertia rod 4 to have a downward flipping trend around the hinge at the moment of impact, so that the impact reaction force kinetic energy of the detection hammer 3 is converted into the rotational kinetic energy of the inertia rod 4, and the gravitational potential energy of the counterweight head 41 further aggravates the downward flipping, so the inertia rod 4 will accelerate the flipping until the counterweight head 41 hits the concrete slab. Figure 3 As shown, by using multiple counterweight heads 41 to impact the concrete slab simultaneously, the bouncing and deflection of the concrete slab after being impacted can be limited to a certain extent, thereby playing an auxiliary positioning effect on the concrete slab.

[0028] Moreover, after the detection hammer 3 impacts the concrete slab, the detection hammer 3 will rebound and jump within 5 - 20 ms. At this time, a cleaning gap is formed between the detection hammer 3 and the concrete slab. After the inertia rod 4 flips, the rack 61 quickly moves upward and squeezes the compressed inflatable member 52. The compressed inflatable member 52 inflates multiple air nozzles 51 through multiple air pipes. The multiple air nozzles 51 spray high-speed airflows towards the cleaning gap on the circumferential side of the cleaning gap, which can blow the crushed slag impacted at the detection point on the concrete slab away from the detection point, ensuring that the detection hammer 3 will not be affected by the impact crushed slag during the next detection, resulting in inaccurate detection results.

[0029] Meanwhile, when the detection of one detection point is completed, the two-axis robotic arm 11 can drive the detection seat 71 and the detection hammer 3 thereon to move to the next detection point. Each time the detection hammer 3 makes an impact, the multiple air nozzles 51 can follow the detection hammer 3 to blow and clean the corresponding detection point, eliminating the need to set up an additional air source and frequently change the position of the air nozzles 51 according to different detection points, nor to separately set valves to control the opening and closing of the airflows in the air nozzles 51, enabling the detection device of the present application to continuously and automatically perform high-quality detection on different detection points of the concrete slab.

[0030] Furthermore, to ensure the blowing quality of the air nozzles 51 on the impact crushed slag, referring to Figure 2 , the detection hammer 3 is further provided with: a receiving groove 31 for accommodating the compressed inflatable member 52; a squeezing rod 63 slidably arranged along the axial direction of the detection hammer 3 in the receiving groove 31. Multiple racks 61 are respectively fixedly connected to the circumferential side of the squeezing rod 63, and the tooth parts of the racks 61 extend out of the outer wall of the detection hammer 3 from the receiving groove 31.

[0031] Thus, when the inertia rod 4 drives the disk counterweight 41 to flip under the action of inertia, the flipping gear 62 follows and flips by an angle close to 90°, and drives the rack 61 to quickly move upward by a large stroke through its dense tooth structure. Thus, under the synchronous drive of multiple inertia rods 4, a large torque can be applied to lift the squeezing rod 63 stably and quickly, so that the squeezing rod 63 moves upward stably and quickly and squeezes the compressed inflatable member 52, so that the compressed inflatable member 52 quickly outputs high-speed airflows to multiple air nozzles 51 for blowing the crushed slag.

[0032] In other feasible embodiments, the air nozzle 51 can further be set as a conical nozzle, and a spiral diversion groove is arranged on the inner cavity wall of the air nozzle 51, so that the airflows ejected by the air nozzle 51 are in a high-speed swirl, further promoting the blowing effect on the impact crushed slag at the detection point.

[0033] In addition, considering that if a plurality of air nozzles 51 circumferentially distributed on the detection hammer 3 simultaneously blow high-speed airflows towards the cleaning gap below the detection hammer 3, it is very likely to form a turbulent flow of counterflows below the detection hammer 3, making it impossible for the debris to be effectively flushed out of the detection point.

[0034] Therefore, in a feasible embodiment, if the number of the plurality of air pipes is odd, the lengths of the plurality of air pipes are all inconsistent and / or throttle holes with different apertures are respectively arranged in the plurality of air pipes; if the number of the plurality of air pipes is even, at least two air pipes arranged relatively have inconsistent lengths and / or throttle holes with different apertures are arranged in the air pipes.

[0035] Thus, by setting the plurality of air pipes connected to the plurality of air nozzles 51 to have different lengths, the time duration for the airflows output from the compressed air inflator 52 to flow to the air nozzles 51 is different, and thus the plurality of air nozzles 51 can form a delayed air jet; similarly, through the design of throttle holes with different apertures, the flow resistance of the airflows in the air pipes can also be adjusted, and the delayed air jet effect of the plurality of air nozzles 51 can also be formed, thereby reducing the influence of air flow counterflows to a certain extent.

[0036] In another feasible embodiment, the jet directions of the airflows ejected by the plurality of air nozzles 51 are tangent to the concentric circles of the cross-section of the detection hammer 3 and have the same tangential direction, and the jet directions of the plurality of air nozzles 51 are tangent to different diameter concentric circles of the cross-section of the detection hammer 3.

[0037] Thus, by setting the jet directions of the air nozzles 51 to be tangent to the concentric circles of the cross-section of the detection hammer 3, even when the opposite air nozzles 51 jet air simultaneously, a large air flow counterflow interference will not be formed, but instead a swirling flow will be formed at the cleaning gap, which can promote the debris below the detection hammer 3 to be flushed out of the detection point.

[0038] In other feasible embodiments, the above two implementation manners can also be combined, combining different air pipe lengths and different jet direction tangential angles to ensure that the debris at the detection point is cleaned up within the time when the detection hammer 3 bounces up from the concrete slab and then falls to contact the detection point.

[0039] In addition, to ensure that the jet angle of the air nozzle 51 provided on the inertia rod 4 can accurately point to the cleaning gap after the detection hammer 3 bounces up, referring to Figure 2 and Figure 3 , the whole inertia rod 4 is arc-shaped and its outer arc side is arranged close to the detection hammer 3, and the air nozzle 51 is installed at the arc top of the inner arc side of the inertia rod 4.

[0040] Thus, by installing the jet nozzle 51 at the apex of the inner arc side of the inertia rod 4, after the inertia rod 4 flips until the counterweight 41 contacts the concrete slab, the jet direction of the jet nozzle 51 can point to the cleaning gap at a relatively large incident angle, ensuring that the debris in the impact pit formed by the impact of the inspection hammer 3 on the concrete slab can also be flushed out by the airflow ejected by the jet nozzle 51, further improving the cleaning degree of the inspection point.

[0041] Correspondingly, in another feasible embodiment, the inertia rod 4 can be further set as a micro-elastic rod, so that after the inertia rod 4 flips until the counterweight 41 impacts the concrete slab, a certain flexural deformation occurs in the middle of the inertia rod 4, and then the airflow ejected by the jet nozzle 51 swings up and down by a certain amplitude, which can also promote the debris in the impact pit to be flushed out by the swinging airflow, so as to improve the cleaning degree of the inspection point.

[0042] In order to improve the stability of the inertia rod 4 with the counterweight 41 attached to the inspection hammer 3, and to prevent the inertia rod 4 from flipping before the inspection hammer 3 contacts the concrete slab, which weakens the flipping inertia of the inertia rod 4, an adsorbent (not shown in the figure) is also provided between the outer arc side of the inertia rod 4 and the inspection hammer 3. The adsorption force of the adsorbent on the two is less than the flipping inertia force of the counterweight 41. The repair part can be a suction cup installed on the inertia rod 4 or the inspection hammer 3, or two magnets that attract each other magnetically or a single magnet, and one of the inertia rod 4 and the inspection hammer 3 is made of ferromagnetic material. In this embodiment, the magnetic adsorption method with controllable adsorption force is selected.

[0043] In this way, when the inspection hammer 3 moves downward, the inertia rod 4 can be stably adsorbed on the inspection hammer 3, and when the inspection hammer 3 impacts the concrete slab, the flipping inertia force of the inertia rod 4 and the configuration head can fully overcome the adsorption force between the inertia rod 4 and the inspection hammer 3 and flip, ensuring the stability of the inertia rod 4 during the inspection process.

[0044] In addition, it is also considered that every time the inspection hammer 3 impacts the concrete slab, the concrete slab may bounce or shift, resulting in inconsistent impact points of the inspection hammer 3 when performing continuous inspections at the same inspection point, which affects the accuracy of the inspection results.

[0045] Refer to Figure 1 、 Figure 3 and Figure 4, an ink sac 42 can also be provided on the counterweight 41. The ink sac 42 is filled with marking ink. An ink outlet micropore 411 communicating with the ink sac 42 is formed on the side of the counterweight 41 facing away from the detection hammer 3; when the detection hammer 3 contacts the concrete slab to be measured and the inertial rod 4 flips until the free end contacts the concrete slab, the ink outlet micropore 411 is vertically aligned with the concrete slab, so that the marking points formed by the ink drops flowing out of the ink outlet micropore 411 are as small as possible. Moreover, a buffer rubber pad 412 is convexly installed on the periphery of the ink outlet micropore 411 of the counterweight 41.

[0046] Thus, when multiple inertial rods 4 synchronously flip and the counterweights 41 thereon impact the concrete slab, a part of the marking ink in the ink sac 42 will also be pushed by the inertial force to flow out of the ink outlet micropore 411 on the counterweight 41 and stain the concrete slab to form smaller marking points. Through one impact, the detection points of the detection hammer 3 on the concrete slab can be accurately located by multiple marking points; when there are multiple impacts, the coincidence degree of different marking points of the ink outlet micropore 411 on the concrete slab can be used to determine whether the actual impact point of the detection hammer 3 on the concrete slab deviates from the established detection point during this impact detection. The specific deviation situation can be compared and identified by additionally setting an industrial camera to capture images, or can be directly visually judged by the operator to make timely disposal measures.

[0047] The setting of the buffer foot pads, on the one hand, is to reduce the bounce when the counterweight 41 impacts the concrete slab, which may cause the jet direction of the air jet nozzle 51 not to point to the cleaning gap; on the other hand, it is to provide good protection for the ink outlet micropore 411 to prevent the slag generated by the impact of the counterweight 41 on the concrete slab from blocking the ink outlet micropore 411, so as to ensure that the ink outlet micropore 411 can perform effective positioning marking every time it is detected.

[0048] Moreover, to ensure the automatic storage after the inertial rod 4 flips, referring to Figure 1 、 Figure 2 and Figure 3 , a plurality of guide rings 32 are fixedly connected to the periphery of the upper part of the detection hammer 3. A hoisting rope 222 with the other end passing through the guide ring 32 is fixedly connected to the free end of the inertial rod 4. The hoisting rope 222 passes through the bearing platform 74. The upper ends of the plurality of hoisting ropes 222 are commonly fixedly connected to a wire collecting head 223, and the wire collecting head 223 is connected to the lower end of the steel wire rope 221; When the detection hammer 3 contacts the concrete slab to be measured and the inertial rod 4 flips until the free end contacts the concrete slab, the wire collecting head 223 does not contact the upper part of the detection hammer 3.

[0049] Thus, after the detection hammer 3 finishes impacting the concrete slab for detection, when the winding motor 23 drives the winding wheel 21 to rotate to wind up the steel wire rope 221, the steel wire rope 221 smoothly pulls up multiple hoisting ropes 222 simultaneously through the wire collecting head 223. Under the guidance of the guiding ring 32, the hoisting ropes 222 first pull multiple inertia rods 4 to flip upward on the detection hammer 3 simultaneously to reset the inertia rods 4. At the same time, the rack 61 drives the extrusion rod 63 to move downward, compressing the inflatable member 52 to return to its original shape and inhale, in preparation for the next impact detection of the detection hammer 3. The limitation of the position of the wire collecting head 223 is to prevent the hoisting ropes 222 from moving downward when the inertia rods 4 flip downward. The wire collecting head 223 limits the downward movement stroke of the hoisting ropes 222 to prevent the inertia rods 4 from not flipping in place.

[0050] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings as understood by those of ordinary skill in the art to which this application pertains. The words "first", "second", "third" and similar terms used in the specification and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. The words "a" or "an" and similar terms do not denote a quantity limitation, but mean that there is at least one. The words "comprising" or "including" and similar terms are intended to mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationships may also change accordingly.

[0051] The above are all the preferred embodiments of this application. It does not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application shall be covered within the protection scope of this application.

Claims

1. A concrete strength detection device for building construction, comprising a detection table (1), a winding wheel (21), a steel wire rope (221), and a detection hammer (3), characterized in that, The detection hammer (3) is provided with: Inertia rods (4), there are multiple ones and they are hinged to the circumferential side of the lower part of the detection hammer (3); Jet nozzles (51), which are arranged on the side of the inertia rod (4) away from the detection hammer (3). When the detection hammer (3) contacts the concrete slab to be measured and the inertia rod (4) flips until the free end contacts the concrete slab, the jetting direction of the jet nozzle (51) obliquely points to the detection point where the detection hammer (3) contacts the concrete slab; Compression and inflation components (52), on which a plurality of air pipes respectively connected to the plurality of jet nozzles (51) one by one are connected, and when it is compressed, it inflates the air pipes, and when there is no external force, it can freely recover and inhale; Rack (61), which is slidably arranged on the detection hammer (3) along the axial direction of the detection hammer (3), and its upper end corresponds to the compressible part of the compression and inflation component (52); and Flip gear (62), which is fixedly connected to the hinged end of the inertia rod (4) and meshes with the rack (61). When the inertia rod (4) flips in the direction away from the detection hammer (3), the rack (61) moves upward and squeezes the compression and inflation component (52).

2. The concrete strength detection device for building construction according to claim 1, characterized in that, The detection hammer (3) is also provided with: Receiving groove (31), which is used to accommodate the compression and inflation component (52); Extrusion rod (63), which is slidably arranged in the receiving groove (31), and the rack (61) is fixedly connected to the circumferential side of the extrusion rod (63).

3. A concrete strength detection device for building construction according to claim 1, characterized in that, If the number of the plurality of air pipes is odd, the lengths of the plurality of air pipes are all inconsistent; If the number of the plurality of air pipes is even, at least two air pipes arranged relatively have inconsistent lengths.

4. A concrete strength detection device for building construction according to any one of claims 1-3, characterized in that, A counterweight (41) is fixedly connected to the free end of the inertia rod (4); when the free end of the inertia rod (4) completely adheres to the detection hammer (3), the included angle between the length direction of the inertia rod (4) and the axis of the detection hammer (3) is an acute angle.

5. The concrete strength detection device for building construction according to claim 4, characterized in that, The whole inertia rod (4) is arc-shaped and its outer arc side is close to the detection hammer (3), and the jet nozzle (51) is installed at the arc top of the inner arc side of the inertia rod (4).

6. A concrete strength detection device for building construction according to claim 4, characterized in that, An adsorbent is arranged between the outer arc side of the inertia rod (4) and the detection hammer (3), and the adsorption force of the adsorbent on the two is less than the flipping inertia force of the counterweight (41).

7. A concrete strength detection device for building construction according to claim 4, characterized in that, An ink sac (42) is arranged on the counterweight (41), and an ink outlet micropore (411) communicated with the ink sac (42) is opened on the side of the counterweight (41) away from the detection hammer (3); When the detection hammer (3) contacts the concrete slab to be measured and the inertia rod (4) flips until the free end contacts the concrete slab, the ink outlet micropore (411) is vertically aligned with the concrete slab.

8. A concrete strength detection device for building construction according to claim 7, characterized in that, A buffer rubber pad (412) is convexly installed on the counterweight (41) around the ink outlet micropore (411).

9. A concrete strength detection device for building construction according to any one of claims 1-3, characterized in that, A plurality of guide rings (32) are fixedly connected to the circumferential side of the upper part of the detection hammer (3). A lifting rope (222) with the other end passing through the guide ring (32) is fixedly connected to the free end of the inertia rod (4). The plurality of inertia rods (4) are circumferentially and equally spaced around the axis of the detection hammer (3). The upper ends of the plurality of lifting ropes (222) are commonly fixedly connected to a wire collecting head (223), and the wire collecting head (223) is connected to the lower end of the steel wire rope (221); When the detection hammer (3) contacts the concrete slab to be measured and the inertia rod (4) flips until its free end contacts the concrete slab, the collecting head (223) does not contact the upper part of the detection hammer (3).

10. A concrete strength detection device for building construction according to claim 9, characterized in that, A two-axis robotic arm (11) and a clamping mechanism (12) for clamping the concrete slab to be measured are provided on the detection table (1). A detection seat (71) is fixedly connected to the output end of the two-axis robotic arm (11). The winding wheel (21) is installed on the detection seat (71). A plurality of sliding rods (72) are vertically and fixedly connected to the lower end surface of the detection seat (71). A ball sliding sleeve (73) is slidably sleeved on the sliding rod (72). A load-bearing platform (74) is fixedly connected between the detection hammer (3) and the plurality of ball sliding sleeves (73). The hoisting rope (222) passes through the load-bearing platform (74).

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