A concrete strength testing device for building construction

Abstract

This application relates to a concrete strength testing device for building construction, comprising a testing hammer, on which are: an inertial rod, having multiple members hinged to the lower periphery of the testing hammer; air nozzles, located on the side of the inertial rod away from the testing hammer, wherein when the testing hammer contacts the concrete slab to be tested and the inertial rod flips to its free end to contact the concrete slab, the air jet direction of the air nozzles is obliquely pointed towards the testing point where the testing hammer contacts the concrete slab; a compression inflation component, on which multiple air pipes are connected, each connected to one of the multiple air nozzles; a rack, slidably disposed on the testing hammer, its upper end corresponding to the compression inflation component; and a reversing gear, fixedly connected to the hinged end of the inertial rod and meshing with the rack. When the testing hammer impacts the concrete slab, the inertial rod flips to point the air nozzles towards the testing point, and the compression inflation component is compressed and inflates the air nozzles, automatically cleaning debris at the testing point. This automatic cleaning process continues even when the testing point is changed.

Description

Technical Field

[0001] This application relates to the technical field of concrete strength testing, and in particular to a concrete strength testing device for building construction. Background Technology

[0002] Concrete is the most important material in construction projects, determining the quality of the project. Strength is the foundation for other properties of concrete and is its most crucial characteristic. Currently, concrete slab strength testing involves using a hammer to impact the slab and assess the damage under stress. In traditional testing, the testing point between the hammer and the slab remains constant, resulting in a fixed stress point and a limited testing range. This leads to slab strength test data that is neither representative nor consistent.

[0003] Currently, in the process of testing the strength of concrete slabs, a steel wire rope is typically wound up on a winding wheel, and the testing hammer is hung on the steel wire rope. The testing hammer impacts the concrete slab by its own weight as it falls freely. A counterweight can also be loaded on the testing hammer to adjust the impact energy on the concrete slab.

[0004] In actual testing, multiple impacts are usually performed at the same test point, followed by repeated testing 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 some of the impact energy, or causing the test hammer to deflect or become misaligned, thus affecting the accuracy of the test data. Summary of the Invention

[0005] To address the issue that debris generated by a test hammer impacting a concrete slab can affect concrete strength testing data, this application provides a concrete strength testing device for building construction.

[0006] The concrete strength testing device for building construction provided in this application adopts the following technical solution:

[0007] A concrete strength testing device for building construction includes a testing platform, a winding reel, a steel wire rope, and a testing hammer, wherein the testing hammer is equipped with:

[0008] Multiple inertial rods are provided and hinged to the lower periphery of the detection hammer;

[0009] The jet nozzle is located on the side of the inertial rod away from the detection hammer. When the detection hammer contacts the concrete slab to be tested and the inertial rod flips to its free end to contact the concrete slab, the jet nozzle sprays obliquely towards the detection point where the detection hammer contacts the concrete slab.

[0010] A compressible inflation component is connected to multiple air pipes that are each connected to multiple air nozzles. When compressed, it inflates the air pipes and can freely recover and inhale when no external force is applied.

[0011] A rack, slidably mounted on the testing hammer along its axial direction, with its upper end corresponding to the compressible part of the compression inflation component; and

[0012] The flip gear is fixed to the hinge end of the inertia rod and meshes with the rack. When the inertia rod flips away from the detection hammer, the rack moves upward and squeezes and compresses the inflatable component.

[0013] Furthermore, the detection hammer is also equipped with:

[0014] A receiving groove for accommodating the compressed air-filled component;

[0015] The extrusion rod is slidably disposed in the receiving groove, and the rack is fixedly connected to the periphery of the extrusion rod.

[0016] Furthermore, if the number of the multiple tracheas is odd, then the lengths of the multiple tracheas are all different;

[0017] If the number of multiple tracheas is even, then at least two tracheas that are arranged opposite each other must have different lengths.

[0018] Furthermore, a counterweight is fixed to the free end of the inertial rod; when the free end of the inertial rod is fully in contact with the detection hammer, the angle between the length direction of the inertial rod and the axis of the detection hammer is an acute angle.

[0019] Furthermore, the inertial rod is arc-shaped with its outer arc side close to the detection hammer, and the air nozzle is installed at the apex of the arc on the inner arc side of the inertial rod.

[0020] Furthermore, an adsorption element is provided between the outer arc side of the inertial rod and the detection hammer, and the adsorption force of the adsorption element on the two is less than the overturning inertial force of the counterweight head.

[0021] Furthermore, the counterweight head is provided with an ink sac, and the side of the counterweight head away from the detection hammer has an ink outlet microhole communicating with the ink sac.

[0022] When the testing hammer contacts the concrete slab to be tested and the inertial rod flips to its free end to contact the concrete slab, the ink outlet micro-hole is vertically aligned with the concrete slab.

[0023] Furthermore, a buffer pad is installed protruding from the side of the ink outlet micro-hole of the counterweight head.

[0024] Furthermore, multiple guide rings are fixed to the upper circumference of the detection hammer, and a hoisting rope with its other end passing through the guide ring is fixed to the free end of the inertial rod. The multiple inertial rods are distributed in a circumferential array with equal spacing around the axis of the detection hammer. The upper ends of the multiple hoisting ropes are fixed to a cable head, and the cable head is connected to the lower end of the wire rope.

[0025] When the testing hammer contacts the concrete slab to be tested and the inertial rod flips to its free end to contact the concrete slab, the cable head does not contact the upper part of the testing hammer.

[0026] Furthermore, the testing platform is equipped with a two-axis robotic arm and a clamping mechanism for holding the concrete slab to be tested. A testing seat is fixedly connected to the output end of the two-axis robotic arm. The winding wheel is installed on the testing seat. Multiple sliding rods are vertically fixed to the lower end face of the testing seat. Ball bearing sleeves are slidably sleeved on the sliding rods. A support platform is fixed between the testing hammer and the multiple ball bearing sleeves. The hoisting rope passes through the support platform.

[0027] In summary, the beneficial technical effects of this application are as follows:

[0028] 1. By setting an inertia rod and a counterweight on the testing hammer, when the testing hammer impacts the concrete slab, on the one hand, the testing hammer will bounce up for a certain period of time; on the other hand, the inertia rod will flip down at the moment of impact until the counterweight hits the concrete slab, which can cause the rack to move up quickly and squeeze and compress the air-filled component. This allows multiple air nozzles to spray high-speed airflow from the periphery of the cleaning gap after the testing hammer bounces up to the cleaning gap. This can blow away the debris impacted at the testing point on the concrete slab and keep it away from the testing point. This can ensure that the testing hammer will not be affected by the impact debris in the next test, which would lead to inaccurate test results.

[0029] 2. After the detection of one detection point is completed, the two-axis robotic arm can drive the detection seat and the detection hammer on it to move to the next detection point. Thus, when the detection hammer impacts, multiple air nozzles can follow the detection hammer to blow and clean the corresponding detection point. There is no need to set up an additional air source or frequently change the position of the air nozzle according to different detection points, nor is there a need to set up a separate valve to control the opening and closing of the airflow in the air nozzle. This can realize the continuous, automated and high-quality detection of different detection points of concrete slabs by the detection device of this application.

[0030] 3. By setting the air tube to different lengths or having throttling orifices of different diameters, delayed air jets from multiple jet nozzles can be formed, which can effectively avoid the formation of opposing turbulent flows below the detection hammer and ensure that the debris can be effectively flushed out of the detection point under the impact of multiple air jets.

[0031] 4. By spraying airflow from multiple nozzles in the same direction and with the same tangential direction as the different concentric circles of the cross-section of the detection hammer, even when opposing nozzles spray air simultaneously, there will be no large airflow collision interference. Instead, a vortex will be formed at the cleaning gap, which can promote the removal of debris from the detection point below the detection hammer.

[0032] 5. By setting the inertial rod as an arc and placing the air nozzle at the apex of the inner arc, the spray direction of the air nozzle can be directed towards the cleaning gap at a larger incident angle, ensuring that the debris in the impact pit created by the test hammer on the concrete slab can also be flushed out by the airflow from the air nozzle; furthermore, by setting the inertial rod as a micro-elastic rod, the middle part of the inertial rod undergoes a certain degree of flexural deformation after the counterweight head impacts the concrete slab, thereby causing the airflow from the air nozzle to swing up and down to a certain amplitude, which can also promote the debris in the impact pit to be flushed out by the swinging airflow, thereby improving the cleanliness of the test point.

[0033] 6. By setting an ink sac and ink outlet micro-holes on the counterweight head, ink droplets flowing from multiple ink outlet micro-holes can form marking points on the concrete slab during each test, thus determining the actual impact point of the test hammer on the concrete slab. When conducting multiple tests at the same test point, the overlap of the marking points on the same side during different impacts can be used to determine whether the actual impact point of the test hammer on the concrete slab has deviated from the predetermined test point position, so as to take timely corrective measures. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0035] Figure 2 This is a cross-sectional structural diagram of an embodiment of this application;

[0036] Figure 3 This is a schematic diagram of the structure of the inertial rod in an embodiment of this application when it flips to the point where the counterweight head contacts the concrete slab;

[0037] Figure 4 yes Figure 1 A magnified view of part A in the middle;

[0038] Figure 5 yes Figure 3 A magnified view of part B in the diagram.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Inspection table; 11. Two-axis robotic arm; 12. Clamping mechanism;

[0041] 21. Winding reel; 221. Wire rope; 222. Lifting rope; 223. Cable header; 23. Winding motor;

[0042] 3. Detection hammer; 31. Receiving groove; 32. Guide ring;

[0043] 4. Inertia rod; 41. Counterweight head; 411. Ink outlet micro-orifice; 412. Buffer pad; 42. Ink sac;

[0044] 51. Air nozzle; 52. Compressed air filling component;

[0045] 61. Rack; 62. Reversing gear; 63. Press rod;

[0046] 71. Testing seat; 72. Slide rod; 73. Ball bearing sleeve; 74. Load-bearing platform. Detailed Implementation

[0047] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] This application discloses a concrete strength testing device for building construction. (Refer to...) Figure 1 , Figure 2 and Figure 3 It includes a testing platform 1, a winding reel 21, a wire rope 221, and a testing hammer 3. Specifically, the testing platform 1 is equipped with a two-axis robotic arm 11 and a clamping mechanism 12 for clamping the concrete slab to be tested. A testing seat 71 is fixedly connected to the output end of the two-axis robotic arm 11. The two-axis robotic 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 described in detail here.

[0049] The aforementioned take-up reel 21 is rotatably mounted on the detection base 71. The detection base 71 is equipped with a take-up motor 23 for driving the take-up reel 21 to rotate. Specifically, the take-up motor 23 can be a servo motor without a reverse self-locking function, allowing the detection hammer 3 to drive the wire rope 221 to fall freely after the take-up reel 21 is released. Multiple sliding rods 72 are vertically fixed to the lower end face of the detection base 71. Ball bearing sleeves 73 are slidably fitted onto the sliding rods 72. A support platform 74 is fixed between the detection hammer 3 and the multiple ball bearing sleeves 73. The support platform 74 can be used to fix and place counterweights.

[0050] Furthermore, referring to Figure 1 , Figure 2 and Figure 3 The detection hammer 3 is equipped with:

[0051] Multiple inertial rods 4 are provided, with their lower ends hinged to the lower circumference of the detection hammer 3. The multiple inertial rods 4 are distributed in a circumferential array with equal spacing around the axis of the detection hammer 3, and the inertial rods 4 are arranged along the axial direction of the detection hammer 3. A counterweight head 41 is fixedly connected to the free end of the inertial rod 4; when the free end of the inertial rod 4 is completely in contact with the detection hammer 3, the angle between the length direction of the inertial rod 4 and the axis of the detection hammer 3 is an acute angle.

[0052] The jet nozzle 51 is located on the side of the inertial rod 4 away from the detection hammer 3. When the detection hammer 3 contacts the concrete slab to be tested and the inertial rod 4 flips to its free end and contacts the concrete slab, the jet nozzle 51 sprays obliquely towards the detection point where the detection hammer 3 contacts the concrete slab.

[0053] The compression inflation component 52 is connected to multiple air tubes (not shown in the figure) that are connected to multiple air nozzles 51 one by one. When it is compressed, it inflates the air tubes and can freely recover and inhale when no external force is applied. The compression inflation component 52 is specifically a compression inflation cylinder made of plastic or a bag and with a built-in return spring.

[0054] A rack 61 is slidably mounted on the detection hammer 3 along its axial direction, with its upper end corresponding to the compressible part of the compression inflation component 52.

[0055] The flip gear 62 is fixed to the hinge end of the inertia rod 4 and meshes with the rack 61. The hinge shaft of the inertia rod 4 on the detection hammer 3 is coaxially set with the flip gear 62. The flip gear 62 is specifically a closely spaced sector gear. When the inertia rod 4 flips away from the detection hammer 3, the rack 61 moves upward and squeezes and compresses the inflation component 52.

[0056] Therefore, when conducting strength testing on 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 jumping or shifting when the testing hammer 3 impacts the concrete slab. Then, the winding motor 23 is controlled to release the wire rope 221. At this time, the testing hammer 3 falls freely under its own weight and the gravity of the counterweight (if any) on the support platform 74. During the fall, the ball bearing sleeve 73 on the support platform 74 slides on the sliding rod 72, which not only avoids excessive impact on the falling impact force of the testing hammer 3, but also positions the impact point of the testing hammer 3 to prevent deviation, ensuring the consistency of the impact point when conducting multiple tests at the same testing point.

[0057] When the testing hammer 3 impacts the testing point on the concrete slab, because the length direction of the inertial rod 4 forms a certain angle with the axis of the testing hammer 3, the impact reaction force is transmitted to the hinge of the inertial rod 4 on the testing hammer 3, forming a reverse torque around the hinge. Due to the inertial effect, the counterweight head 41 and the inertial rod 4 exhibit a delayed response, causing the inertial rod 4 to tend to flip downwards around the hinge at the moment of impact. This converts the kinetic energy of the impact reaction force of the testing hammer 3 into the rotational kinetic energy of the inertial rod 4. The gravitational potential energy of the counterweight head 41 further exacerbates the downward flipping, thus accelerating the flipping of the inertial rod 4 until the counterweight head 41 impacts the concrete slab. Figure 3 As shown, by using multiple counterweights 41 to simultaneously impact the concrete slab, the bouncing and displacement of the concrete slab after impact can be limited to a certain extent, thus playing an auxiliary positioning role for the concrete slab.

[0058] Furthermore, after impacting the concrete slab, the test hammer 3 will bounce back within 5 to 20 ms. At this time, a clean gap is formed between the test hammer 3 and the concrete slab. After the inertia rod 4 flips, the rack 61 moves up quickly and squeezes and compresses the air-filled component 52. The air-filled component 52 inflates into multiple air nozzles 51 through multiple air pipes. The multiple air nozzles 51 spray high-speed airflow around the clean gap, which can blow away the debris impacted at the test point on the concrete slab and keep it away from the test point. This can ensure that the test hammer 3 will not be affected by the impact debris in the next test, which would lead to inaccurate test results.

[0059] Meanwhile, once 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 on it to move to the next detection point. Each time the detection hammer 3 impacts, multiple air nozzles 51 can follow the detection hammer 3 to blow and clean the corresponding detection point. There is no need to set up an additional air source or frequently change the position of the air nozzles 51 according to different detection points, nor is there a need to set up a separate valve to control the opening and closing of the airflow in the air nozzles 51. This can realize the continuous, automated, and high-quality detection of different detection points of concrete slabs by the detection device of this application.

[0060] Furthermore, to ensure the quality of the jet nozzle 51's blowing of the impact debris, refer to Figure 2 The detection hammer 3 is also equipped with:

[0061] The receiving groove 31 is used to accommodate the compressed air-filled component 52;

[0062] The extrusion rod 63 is slidably disposed in the receiving groove 31 along the axial direction of the detection hammer 3. Multiple racks 61 are respectively fixed to the periphery of the extrusion rod 63, and the teeth of the racks 61 extend out of the receiving groove 31 beyond the outer wall of the detection hammer 3.

[0063] Therefore, when the inertial rod 4 drives the disc counterweight head 41 to rotate under the action of inertia, the rotating gear 62 follows the rotation angle to close to 90°, and through its closely spaced tooth structure, drives the rack 61 to move up quickly with a large stroke. Thus, under the synchronous drive of multiple inertial rods 4, a large torque can be lifted on the extrusion rod 63, so that the extrusion rod 63 moves up stably and quickly and extrudes the compression inflation component 52, so that the compression inflation component 52 can quickly output high-speed airflow into multiple jet nozzles 51 to blow away the slag.

[0064] In other feasible embodiments, the jet nozzle 51 can be further configured as a conical nozzle, and a spiral guide groove can be provided on the inner wall of the jet nozzle 51 so that the airflow ejected from the jet nozzle 51 is a high-speed swirling flow, which further promotes the blasting effect on the impact debris at the detection point.

[0065] Furthermore, considering that if multiple jet nozzles 51 distributed circumferentially on the detection hammer 3 simultaneously blow high-speed airflow into the cleaning gap below the detection hammer 3, it is highly likely that a countercurrent turbulence will be formed below the detection hammer 3, making it impossible for debris to be effectively flushed out of the detection point.

[0066] Therefore, in one feasible embodiment, if the number of the plurality of tracheas is odd, the lengths of the plurality of tracheas are not the same and / or the plurality of tracheas are provided with throttling orifices of different diameters; if the number of the plurality of tracheas is even, at least two tracheas arranged opposite each other have different lengths and / or the tracheas are provided with throttling orifices of different diameters.

[0067] Therefore, by setting the multiple air pipes connected to the multiple jet nozzles 51 to different lengths, the time it takes for the airflow output from the self-compressing inflation component 52 to flow to the jet nozzles 51 is different, thereby enabling the multiple jet nozzles 51 to form a delayed jet; similarly, by designing throttling orifices of different diameters, the flow resistance of the airflow in the air pipes can also be adjusted, which can also form a delayed jet effect of the multiple jet nozzles 51, thereby reducing the impact of airflow counteraction to a certain extent.

[0068] In another feasible embodiment, the jet direction of the airflow ejected by the multiple jet nozzles 51 is tangent to the concentric circles of the cross-section of the detection hammer 3 and the tangential direction is the same. The jet direction of the multiple jet nozzles 51 is tangent to concentric circles of different diameters of the cross-section of the detection hammer 3.

[0069] Therefore, by setting the jet direction of the jet nozzle 51 to be tangent to the concentric circle of the cross-section of the detection hammer 3, even when the opposing jet nozzles 51 jet at the same time, there will be no large airflow collision interference. Instead, a vortex will be formed at the cleaning gap, which can promote the debris below the detection hammer 3 to be flushed out from the detection point.

[0070] In other feasible embodiments, the two implementation methods described above can be combined, with different air pipe lengths and different jet direction tangential angles, to ensure that the detection hammer 3 cleans up the debris at the detection point within the time it takes to bounce off the concrete slab and fall to contact the detection point.

[0071] In addition, to ensure that the jet nozzle 51 installed on the inertial rod 4 can accurately point to the cleaning gap after the detection hammer 3 bounces up, refer to Figure 2 and Figure 3 The inertial rod 4 is arc-shaped and its outer arc side is close to the detection hammer 3. The jet nozzle 51 is installed at the top of the arc on the inner arc side of the inertial rod 4.

[0072] Therefore, by installing the jet nozzle 51 at the top of the arc on the inner arc side of the inertial rod 4, after the inertial rod 4 flips to contact the counterweight head 41 with the concrete slab, the jet nozzle 51 can spray at a larger incident angle to the cleaning gap, so as to ensure that the debris in the impact pit of the test hammer 3 on the concrete slab can also be flushed out by the airflow sprayed by the jet nozzle 51, further improving the cleaning degree of the test point.

[0073] Correspondingly, in another feasible embodiment, the inertial rod 4 can be further configured as a micro-elastic rod, so that after the inertial rod 4 flips over and the counterweight head 41 impacts the concrete slab, the middle part of the inertial rod 4 undergoes a certain degree of flexural deformation, thereby causing the airflow ejected from the jet nozzle 51 to swing up and down to a certain extent, which can also promote the debris in the impact pit to be flushed out by the swinging airflow, so as to improve the cleanliness of the detection point.

[0074] To improve the stability of the inertial rod 4 with the counterweight head 41 when it is attached to the detection hammer 3, and to prevent the inertial rod 4 from flipping before the detection hammer 3 contacts the concrete slab, thus weakening the flipping inertia of the inertial rod 4, an adsorption component (not shown in the figure) is also provided between the outer arc side of the inertial rod 4 and the detection hammer 3. The adsorption force of the adsorption component on the two is less than the flipping inertia force of the counterweight head 41. The adsorption component can be a suction cup installed on the inertial rod 4 or the detection hammer 3, or it can be two magnets that attract each other or a single magnet, and one of the inertial rod 4 and the detection hammer 3 is made of ferromagnetic material. In this embodiment, a magnetic adsorption method with controllable adsorption force is selected.

[0075] In this way, when the detection hammer 3 moves downward, the inertial rod 4 can be stably attached to the detection hammer 3. When the detection hammer 3 hits the concrete slab, the inertial rod 4 and the flipping inertial force of the configuration head can fully overcome the adsorption force between the inertial rod 4 and the detection hammer 3 and flip over, which can ensure the stability of the inertial rod 4 during the detection process.

[0076] In addition, it is also considered that the concrete slab may bounce or shift each time the test hammer 3 impacts the concrete slab, which may cause the impact point of the test hammer 3 to be inconsistent when continuously testing the same test point, thus affecting the accuracy of the test results.

[0077] Reference Figure 1 , Figure 3 and Figure 4 Furthermore, an ink sac 42 filled with marking ink can be installed on the counterweight head 41. The counterweight head 41, on the side opposite to the testing hammer 3, has an ink outlet micro-hole 411 communicating with the ink sac 42. When the testing hammer 3 contacts the concrete slab to be tested and the inertial rod 4 flips to its free end to contact the concrete slab, the ink outlet micro-hole 411 is vertically aligned with the concrete slab, so that the marking points formed by the ink droplets flowing from the ink outlet micro-hole 411 on the concrete slab are as small as possible. Additionally, a buffer pad 412 protrudes from the counterweight head 41 around the ink outlet micro-hole 411.

[0078] Therefore, when multiple inertial rods 4 simultaneously flip and impact the counterweight head 41 on the concrete slab, the marking ink in the ink sac 42 will also be pushed out of the ink outlet micro-hole 411 on the counterweight head 41 by the inertial force, and will be stuck on the concrete slab to form small marking points. After one impact, multiple marking points can accurately locate the detection point of the detection hammer 3 on the concrete slab. By measuring the overlap of different marking points on the concrete slab by the ink outlet micro-hole 411 during multiple impacts, it can be determined whether the actual impact point of the detection hammer 3 on the concrete slab deviates from the predetermined detection point during the impact test. The specific deviation can be identified by comparing images captured by an additional industrial camera, or by direct visual judgment by the operator, so as to take timely measures.

[0079] The cushioning pad serves two purposes: firstly, it reduces the bouncing of the counterweight head 41 when it impacts the concrete slab, which could cause the jet nozzle 51 to spray out of the cleaning gap; secondly, it provides good protection for the ink outlet micro-hole 411, preventing debris from the counterweight head 41 impacting the concrete slab from clogging the ink outlet micro-hole 411, thus ensuring that the ink outlet micro-hole 411 can be effectively positioned and marked during each test.

[0080] Furthermore, to ensure automatic storage after the inertia rod 4 flips over, refer to Figure 1 , Figure 2 and Figure 3 Multiple guide rings 32 are fixedly connected to the upper periphery 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 support platform 74. The upper ends of the multiple hoisting ropes 222 are fixedly connected to a cable head 223, which is connected to the lower end of the wire rope 221.

[0081] When the testing hammer 3 contacts the concrete slab to be tested and the inertial rod 4 flips to its free end and contacts the concrete slab, the cable head 223 does not contact the upper part of the testing hammer 3.

[0082] Therefore, after the test hammer 3 impacts the concrete slab and completes the test, the winding motor 23 drives the winding wheel 21 to rotate to wind up the wire rope 221. The wire rope 221, through the cable collector 223, smoothly and simultaneously pulls multiple lifting ropes 222 upwards. Guided by the guide ring 32, the lifting ropes 222 first pull multiple inertial rods 4 upwards on the test hammer 3 to reset the inertial rods 4. Simultaneously, the rack 61 drives the compression rod 63 downwards, compressing the inflation component 52 to return to its original shape and draw in air, preparing for the next impact test by the test hammer 3. The limitation on the position of the cable collector 223 is to prevent the lifting ropes 222 from moving downwards when the inertial rods 4 rotate downwards. The cable collector 223 restricts the downward stroke of the lifting ropes 222, preventing the inertial rods 4 from failing to rotate into place.

[0083] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0084] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A concrete strength testing device for building construction, comprising a testing platform (1), a winding reel (21), a steel wire rope (221), and a testing hammer (3), characterized in that, The detection hammer (3) is equipped with: Multiple inertial rods (4) are provided and hinged to the lower periphery of the detection hammer (3); The jet nozzle (51) is located on the side of the inertial rod (4) away from the detection hammer (3). When the detection hammer (3) contacts the concrete slab to be tested and the inertial rod (4) is flipped to the free end and contacts the concrete slab, the jet nozzle (51) sprays obliquely towards the detection point where the detection hammer (3) contacts the concrete slab. The compression inflation component (52) is connected to a plurality of air pipes that are respectively connected to a plurality of air nozzles (51), and when it is compressed, it inflates the air pipes and can freely recover and inhale when no external force is applied. A 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 part of the compression inflation component (52); and The flip gear (62) is fixed to the hinge end of the inertia rod (4) and meshes with the rack (61). When the inertia rod (4) flips away from the detection hammer (3), the rack (61) moves upward and squeezes and compresses the air inflator (52).

2. The concrete strength testing device for building construction according to claim 1, characterized in that, The detection hammer (3) is also equipped with: A receiving groove (31) is used to accommodate the compressed air-filled component (52); The extrusion rod (63) is slidably disposed in the receiving groove (31), and the rack (61) is fixed to the periphery of the extrusion rod (63).

3. The concrete strength testing device for building construction according to claim 1, characterized in that, If the number of the multiple tracheas is odd, then the lengths of the multiple tracheas are all different; If the number of multiple tracheas is even, then at least two tracheas that are arranged opposite each other must have different lengths.

4. A concrete strength testing device for building construction according to any one of claims 1-3, characterized in that, The free end of the inertial rod (4) is fixed with a counterweight head (41); when the free end of the inertial rod (4) is completely in contact with the detection hammer (3), the angle between the length direction of the inertial rod (4) and the axis of the detection hammer (3) is an acute angle.

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

6. The concrete strength testing device for building construction according to claim 4, characterized in that, An adsorption element is provided between the outer arc side of the inertial rod (4) and the detection hammer (3), and the adsorption force of the adsorption element on the two is less than the overturning inertial force of the counterweight head (41).

7. A concrete strength testing device for building construction according to claim 4, characterized in that, The counterweight head (41) is provided with an ink sac (42), and an ink outlet microhole (411) communicating with the ink sac (42) is opened on the side of the counterweight head (41) away from the detection hammer (3). When the testing hammer (3) contacts the concrete slab to be tested and the inertial rod (4) flips to its free end and contacts the concrete slab, the ink outlet micro-hole (411) is vertically aligned with the concrete slab.

8. A concrete strength testing device for building construction according to claim 7, characterized in that, The counterweight head (41) has a buffer pad (412) protruding from the side of the ink outlet microhole (411).

9. A concrete strength testing device for building construction according to any one of claims 1-3, characterized in that, Multiple guide rings (32) are fixed to the upper circumference of the detection hammer (3), and a hoisting rope (222) with the other end passing through the guide ring (32) is fixed to the free end of the inertial rod (4). The multiple inertial rods (4) are distributed in a circumferential array with equal spacing around the axis of the detection hammer (3). The upper ends of the multiple hoisting ropes (222) are fixed to a wire feeder (223), and the wire feeder (223) is connected to the lower end of the wire rope (221). When the test hammer (3) contacts the concrete slab to be tested and the inertial rod (4) flips to its free end and contacts the concrete slab, the cable head (223) does not contact the upper part of the test hammer (3).

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

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