A concrete coring device for engineering quality inspection

Abstract

This invention relates to the field of concrete material testing equipment technology, and more particularly to a concrete core sampling device for engineering quality testing. It includes: a movable frame rotatably connected to a threaded rod; a lifting frame threadedly connected to the threaded rod, the lifting frame slidably connected to the movable frame, and a power motor and a fixed frame fixedly connected to the lifting frame; a drill barrel rotatably connected to the fixed frame; a drill ring disposed within the drill barrel; a sliding shell slidably connected inside the drill barrel, the sliding shell slidably connected to symmetrically distributed sliding blocks; and a steel wire rope fixedly connected between the sliding blocks and the drill barrel. This invention uses the sliding shell to move the sliding blocks and tighten the steel wire rope, gradually taut and compressing the concrete core to achieve fixation. This allows for fixation of the concrete at multiple locations, increasing the contact area between the steel wire rope and the concrete core, thereby reducing the probability of the concrete core falling out and improving the efficiency of concrete core sampling.

Description

Technical Field

[0001] This invention relates to the field of concrete material testing equipment, and in particular to a concrete core sampling device for engineering quality testing. Background Technology

[0002] Concrete core drilling is a common method for assessing the quality and strength of concrete structures. Existing testing equipment typically uses a hollow drill bit to make a circumferential cut at a predetermined location during core drilling, separating the concrete core sample from the main structure. The drill bit is then removed, and the core sample is extracted using a clamping device. However, because the bottom of the fractured concrete core is in contact with the substrate, existing equipment cannot secure it from the bottom; it can only clamp the core from the side. Furthermore, the small gap between the existing borehole wall and the concrete core limits the depth to which the clamping device can penetrate the borehole, resulting in insufficient effective embedding depth and a small contact area between the clamping device and the concrete core. Additionally, the polishing effect generated by the continuous friction between the drill bit and the concrete during drilling significantly reduces the surface roughness of the core sample, leading to weak clamping force and a tendency for the concrete core to detach. This makes it difficult for workers to remove the core, and detached cores are easily damaged upon impact with the main structure, requiring resampling and impacting the efficiency of concrete core testing. Summary of the Invention

[0003] This invention provides a concrete core sampling device for engineering quality testing, which addresses the shortcomings of existing sampling devices that cannot directly extract concrete cores after drilling.

[0004] Technical Solution: A concrete core sampling device for engineering quality testing, comprising: a movable frame rotatably connected to a threaded rod; a lifting frame threadedly connected to the threaded rod, the lifting frame slidably connected to the movable frame, the lifting frame being fixedly connected to a power motor and a fixed frame; a drill barrel rotatably connected to the fixed frame, the drill barrel being driven by a pulley and a belt through which the output shaft of the power motor is connected; a drill ring disposed in the drill barrel, the lower part of the drill ring being fixedly connected to circumferentially distributed broken blocks; a sliding shell slidably connected inside the drill barrel, the sliding shell being slidably connected to symmetrically distributed sliding blocks, the sliding blocks being fixedly connected to the sliding shell by a first spring; steel wire ropes, the number of which is the same as the number of sliding blocks, fixedly connected between adjacent sliding blocks and the drill barrel; and a power assembly disposed on the fixed frame, used to drive the symmetrically distributed sliding blocks to move and tighten the steel wire ropes, so that the steel wire ropes fix the concrete core.

[0005] Furthermore, the power assembly includes: an electric push rod fixedly connected to the fixed frame, with an adjusting frame fixedly connected to the telescopic end of the electric push rod, the adjusting frame being slidably and rotatably connected to the drill barrel; a transmission frame rotatably connected to the adjusting frame, the transmission frame being slidably connected to the drill barrel; a compression ring slidably connected to the drill barrel, the compression ring being located on the moving path of the transmission frame, the compression ring having an arc surface on the side near the sliding shell, the arc surface of the compression ring being used to push all the sliding blocks to move, a tension spring being fixedly connected between the compression ring and the drill barrel; and a crushing assembly disposed on the drill ring for breaking the concrete core.

[0006] Furthermore, a fixed shell is fixedly connected to the side of the transmission frame near the sliding shell, and the fixed shell is slidably connected to the extrusion ring. The fixed shell is used to fix the position of the sliding block.

[0007] Furthermore, the side of the extrusion ring closest to the fixed shell has a gradient surface, and the diameter of the gradient surface on the extrusion ring increases as the distance between it and the sliding shell increases. This gradient surface is used to extrude the fixed shell to deform it.

[0008] Furthermore, a buffer ring is fixedly connected to the sliding shell, and the buffer ring is located on the moving path of the extrusion ring.

[0009] Furthermore, the crushing assembly includes: a crushing rod slidably connected to the drill ring, the end of the crushing rod near the central axis of the drill ring being tapered to reduce the contact area between the crushing rod and the concrete core, and a second spring fixedly connected between the crushing rod and the drill ring; and a transmission assembly disposed on the adjusting frame for pushing the crushing rod to move.

[0010] Furthermore, it also includes the transmission assembly: a vibration ring fixedly connected to the adjusting frame; a transmission rod slidably connected to the drill barrel, the transmission rod being slidably connected to the drill ring, the vibration ring having evenly distributed protrusions, the protrusions of the vibration ring being used to push the transmission rod to move, a third spring being fixedly connected between the transmission rod and the drill barrel; and a trapezoidal block fixedly connected to the side of the transmission rod away from the vibration ring, the trapezoidal block being slidably connected to the drill ring, the trapezoidal block being used to push the crushing rod to move.

[0011] Furthermore, it also includes: multiple elastic ropes symmetrically distributed and fixed to the drill ring; the drill ring is provided with multiple arc-shaped grooves; the elastic ropes are located in adjacent arc-shaped grooves on the drill ring; the elastic ropes are used to fix the lower part of the concrete core; and the drill barrel is slidably connected to the drill ring.

[0012] Furthermore, the drill barrel is fixed with the same number of baffles as the elastic ropes, the baffles are slidably connected to the drill ring, and the baffles are used to compress the elastic ropes.

[0013] Furthermore, the side of the baffle away from the drill barrel is an arc-shaped surface, and the distance between the middle of the arc-shaped surface of the baffle and the drill barrel is smaller than the distance between its two sides and the drill barrel.

[0014] The beneficial effects of the present invention are as follows: 1. In the process of taking concrete cores, the present invention uses a sliding shell to drive a sliding block to move and tighten the steel wire rope, so that the steel wire rope gradually tightens and squeezes the concrete core to complete the fixation, thereby fixing the concrete at multiple positions, increasing the contact area between the steel wire rope and the concrete core, thereby reducing the probability of the concrete core falling off and improving the efficiency of concrete core taking.

[0015] 2. In this invention, after the steel wire rope fixes the concrete core, the sliding block is squeezed by the extrusion ring, causing the sliding block to move and tighten the steel wire rope, thereby increasing the fixing force of the steel wire rope on the concrete core and ensuring the fixing effect on the concrete core.

[0016] 2. In this invention, after the concrete core is fixed by the wire rope, the sliding block is fixed by the fixing shell, so that the sliding block cannot move. This prevents the sliding block from moving during the upward movement of the concrete core, which would cause the wire rope to loosen and release the fixing of the concrete core, thus affecting the normal removal of the concrete core.

[0017] 3. In the process of moving the concrete core upward, the present invention supports the lower part of the concrete core with an elastic rope, thereby further reducing the probability of the concrete core falling off. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the lifting frame, power motor, and fixing frame of the present invention;

[0020] Figure 3 This is a three-dimensional structural diagram of the electric push rod, adjusting frame, and vibration ring of the present invention;

[0021] Figure 4 This is a three-dimensional structural diagram of the sliding block, transmission frame, and transmission rod of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the extrusion ring, fixing shell, and buffer ring of the present invention;

[0023] Figure 6 This is a three-dimensional structural diagram of the vibration ring, transmission rod, and third spring of the present invention;

[0024] Figure 7 This is a three-dimensional structural diagram of the sliding block, wire rope, and first spring of the present invention;

[0025] Figure 8 This is a three-dimensional structural diagram of the trapezoidal block, the breaking rod, and the second spring of the present invention;

[0026] Figure 9 This is an exploded three-dimensional view of the drill ring, elastic rope, and baffle of the present invention.

[0027] Reference numerals: 1-Moving frame, 2-Threaded rod, 3-Lifting frame, 4-Power motor, 5-Fixed frame, 6-Drill barrel, 7-Drill ring, 8-Breaking block, 9-Sliding shell, 10-Sliding block, 11-Wire rope, 101-First spring, 12-Electric push rod, 13-Adjusting frame, 14-Transmission frame, 15-Compression ring, 16-Tension spring, 17-Fixed shell, 18-Buffer ring, 19-Vibration ring, 20-Transmission rod, 21-Third spring, 22-Trapezoidal block, 23-Breaking rod, 24-Second spring, 25-Elastic rope, 26-Baffle. Detailed Implementation

[0028] The invention will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments of the invention are illustrated. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and to fully convey the scope of the invention to those skilled in the art.

[0029] A concrete core sampling device for engineering quality testing, such as Figures 1-8 As shown, the system includes: a movable frame 1, which is rotatably connected to a threaded rod 2; a lifting frame 3, which is threadedly connected to the threaded rod 2 and slidably connected to the movable frame 1, and is fixedly connected to a power motor 4 and a fixed frame 5; a drill barrel 6, which is rotatably connected to the fixed frame 5, and is connected to the output shaft of the power motor 4 via a pulley and belt drive; a drill ring 7, which is disposed on the drill barrel 6, and is fixedly connected to the lower part of the drill ring 7 with circumferentially distributed broken blocks 8; a sliding shell 9, which is slidably connected inside the drill barrel 6, and is slidably connected to symmetrically distributed sliding blocks 10, and is fixedly connected between the sliding blocks 10 and the sliding shell 9 with a first spring 101; steel wire ropes 11, the same number as the number of sliding blocks 10, and fixedly connected between adjacent sliding blocks 10 and the drill barrel 6; and a power assembly, which is disposed on the fixed frame 5, for driving the symmetrically distributed sliding blocks 10 to move and tighten the steel wire ropes 11, so that the steel wire ropes 11 fix the concrete core.

[0030] The above solution provides a method for directly removing the concrete core from the borehole by binding it to the side with a steel wire rope 11 after concrete drilling is completed; the moving frame 1 is equipped with a handrail, which facilitates the worker to push the device to move and adjust its position; initially, the lifting frame 3 is located above the threaded rod 2, and both the drill barrel 6 and the drill ring 7 are provided with flow channels, and the flow channels of the drill barrel 6 and the drill ring 7 are connected by a rigid pipe. The upper part of the fixed frame 5 is connected to an external water pump through a flexible hose to deliver cooling water to the flow channels of the drill barrel 6 and the drill ring 7 to reduce the temperature of the drill ring 7 and the broken block 8 during the drilling process; in this embodiment, the drill barrel 6 and the drill ring 7 are fixedly connected, and there will be no relative sliding between them. The minimum inner diameter of the drill barrel 6 and the minimum inner diameter of the drill ring 7 are... The minimum inner diameters are the same, and the breaking block 8 is used to break the concrete; the sliding shell 9 is composed of a circular plate and a circular tube. The minimum inner diameter of the circular tube on the sliding shell 9 is the same as the minimum inner diameter of the drill barrel 6. Initially, the lower side of the sliding shell 9 is in contact with the drill barrel 6, and the two together form a storage cavity. The wire rope 11 is located in the storage cavity and passes through the upper part of the sliding shell 9. In this embodiment, there are two sliding blocks 10 and two wire ropes 11. Their number and length can be adjusted according to the actual situation. The circular plate of the sliding shell 9 is provided with two sliding grooves. Initially, the sliding block 10 is located in the sliding groove on the sliding shell 9 on the side close to the inner wall of the drill barrel 6. The first spring 101 is used to push the sliding block 10 to reset; the wire rope 11 is spirally located in the storage cavity formed by the sliding shell 9 and the drill barrel 6.

[0031] Further, such as Figures 3-6 As shown, the power assembly includes: an electric push rod 12, fixed to the fixed frame 5, with an adjusting frame 13 fixed to the telescopic end of the electric push rod 12, the adjusting frame 13 being slidably and rotatably connected to the drill barrel 6; a transmission frame 14, rotatably connected to the adjusting frame 13, the transmission frame 14 being slidably connected to the drill barrel 6; a compression ring 15, slidably connected to the drill barrel 6, the compression ring 15 being located on the moving path of the transmission frame 14, the side of the compression ring 15 near the sliding shell 9 having an arc surface, the arc surface of the compression ring 15 being used to push all the sliding blocks 10 to move, a tension spring 16 being fixedly connected between the compression ring 15 and the drill barrel 6; and a crushing assembly, set on the drill ring 7, used to break the concrete core.

[0032] Further, such as Figure 5 and Figure 6 As shown, a fixed shell 17 is fixedly connected to the side of the transmission frame 14 near the sliding shell 9. The fixed shell 17 is slidably connected to the compression ring 15. The fixed shell 17 is used to fix the position of the sliding block 10.

[0033] Further, such as Figure 4-Figure 6 As shown, the side of the extrusion ring 15 closest to the fixed shell 17 is a gradient surface, and the diameter of the gradient surface on the extrusion ring 15 increases as the distance between it and the sliding shell 9 increases. This gradient surface is used to extrude the fixed shell 17 to deform it.

[0034] Further, such as Figures 3-5 , Figure 7 and Figure 8 As shown, a buffer ring 18 is fixedly connected to the sliding shell 9, and the buffer ring 18 is located on the moving path of the compression ring 15.

[0035] The above solution provides a method to move the sliding block 10 when the concrete core is removed, so that the sliding block 10 tightens the steel wire rope 11 and increases the fixing force of the steel wire rope 11 on the concrete core. The sliding block 10 consists of a ball-head rod and a rectangular block. The ball-head rod of the sliding block 10 is used to reduce wear when it is squeezed with the extrusion ring 15. The electric push rod 12 is used to drive the adjustment frame 13 to move. The transmission frame 14 is used to push the extrusion ring 15 downward. The arc surface of the extrusion ring 15 is concave upward. This arc surface is used to squeeze when the extrusion ring 15 moves downward. The sliding block 10 and the tension spring 16 are used to drive the compression ring 15 to move upward and reset. The fixed shell 17 is elastic. Initially, the gradient surface of the compression ring 15 and the lower side of the fixed shell 17 are uniformly transitioned, so that the fixed shell 17 can gather towards the middle when it is squeezed by the gradient surface of the compression ring 15, thereby locking the ball head rod of the sliding block 10, so that the sliding block 10 cannot drive the wire rope 11 to move. The buffer ring 18 is used to buffer the squeezing force between the compression ring 15 and the sliding block 10. The wire rope 11 passes through the buffer ring 18.

[0036] Further, such as Figure 7 and Figure 8 As shown, the crushing assembly includes: a crushing rod 23, which is slidably connected to the drill ring 7. One end of the crushing rod 23 near the central axis of the drill ring 7 is tapered to reduce the contact area between the crushing rod 23 and the concrete core. A second spring 24 is fixed between the crushing rod 23 and the drill ring 7. A transmission assembly is set on the adjusting frame 13 to push the crushing rod 23 to move.

[0037] Further, such as Figures 3-8 As shown, it also includes a transmission assembly: a vibrating ring 19, fixedly connected to the adjusting frame 13; a transmission rod 20, slidably connected to the drill barrel 6, the transmission rod 20 being slidably connected to the drill ring 7, the vibrating ring 19 being provided with evenly distributed protrusions, the protrusions of the vibrating ring 19 being used to push the transmission rod 20 to move, a third spring 21 being fixedly connected between the transmission rod 20 and the drill barrel 6; and a trapezoidal block 22, fixedly connected to the side of the transmission rod 20 away from the vibrating ring 19, the trapezoidal block 22 being slidably connected to the drill ring 7, the trapezoidal block 22 being used to push the crushing rod 23 to move.

[0038] The above solution provides a method to break and separate the concrete core from the matrix by uniformly striking the connection between the concrete core and the matrix during the concrete core extraction process. Initially, the breaking rod 23 is located inside the drill ring 7. The cone shape of the breaking rod 23 is used to concentrate its force on the concrete core, and the second spring 24 is used to push the breaking rod 23 to reset. The upper end of the transmission rod 20 is hemispherical, and the cross-section of the protrusion on the vibration ring 19 is an isosceles trapezoid. The height of the protrusion on the vibration ring 19 is less than the radius of the upper hemisphere of the transmission rod 20. The protrusion on the vibration ring 19 squeezes the transmission rod 20 through its inclined surface, causing the transmission rod 20 to drive the trapezoidal block 22 to move downward.

[0039] Workflow: When it is necessary to drill for concrete core, the operator pushes the device to a suitable sampling position, aligning the central axis of the drill barrel 6 with the center of the sampling location. Then, the operator starts the power motor 4 and water pump. The output shaft of the power motor 4 drives the drill barrel 6 to rotate via pulleys and belts. The drill barrel 6 drives the drill ring 7, sliding shell 9, and other parts thereon to rotate. The drill ring 7 drives the broken block 8 to rotate. The water pump delivers cooling water to the flow channel of the drill barrel 6 through the fixed frame 5. The cooling water entering the flow channel of the drill barrel 6 enters the flow channel of the drill ring 7 through a rigid pipe, then exits from the bottom of the flow channel of the drill ring 7 and falls onto the concrete surface. At this time, the operator rotates the threaded rod 2 at a uniform speed, causing the threaded rod 2 to drive the lifting frame 3 to move downwards. The lifting frame 3 drives the power motor 4 and fixed frame 5 to move downwards, and the fixed frame 5 drives the drill barrel 6 and its parts downwards, causing the broken block 8 to gradually approach the concrete surface. Once the broken block 8 contacts the concrete surface, the threaded rod 2 continues to drive the lifting frame 3 to move downwards, causing the broken block 8 to continue moving downwards and breaking the concrete. The resulting concrete core gradually enters the drill ring 7 and the drill barrel 6.

[0040] As the crushing block 8 continues to move downwards and break the concrete, the thickness of the concrete core inside the drill barrel 6 gradually increases. When the upper side of the concrete core contacts the sliding shell 9, the concrete core pushes the sliding shell 9 to move upwards relative to the drill barrel 6. The sliding shell 9 drives the sliding block 10 to move synchronously. The sliding block 10 moves upwards relative to the drill barrel 6, pulling the wire rope 11, causing the wire rope 11 to gradually tighten and approach the concrete core. During this process, the wire rope 11 does not contact the concrete core. After the drill barrel 6 penetrates into the concrete to a specified depth, the operator stops rotating the threaded rod 2, the lifting frame 3 stops moving, and the drill barrel 6 and its parts stop moving. The operator starts the electric push rod 12. The telescopic end of the electric push rod 12 drives the adjusting frame 13 to move downwards. The adjusting frame 13 drives the transmission frame 14 and the vibration ring 19 to move downwards. The transmission frame 14 drives the fixed shell 17 to move downwards and squeezes the compression ring 15, causing the compression ring 15 to move synchronously and stretch the tension spring 16. During this process, the drill barrel 6 always drives the parts on it to rotate.

[0041] During the downward movement of the aforementioned transmission frame 14, the transmission frame 14 drives the compression ring 15 to move downward through the fixed shell 17. The compression ring 15 moves and stretches the tension spring 16 until the arc surface of the compression ring 15 contacts the ball head rod of the sliding block 10. The compression ring 15 continues to move downward and compresses the two sliding blocks 10, causing the two sliding blocks 10 to move closer to each other and compress the first spring 101. The sliding blocks 10 move and tighten the wire rope 11, causing the wire rope 11 to contract and tighten until it contacts the concrete core. The wire rope 11 then compresses the concrete core. During this process, when the compression ring 15 contacts the buffer ring 18, the compression ring 15 compresses... The buffer ring 18 continues to move downwards until it can no longer be compressed. The compression ring 15 stops moving downwards, and the sliding block 10 separates from the arc surface of the compression ring 15. The sliding block 10 moves to the bottom of the fixed shell 17 and is located inside the adjacent groove of the sliding shell 9. As the transmission frame 14 drives the fixed shell 17 to continue moving downwards, the lower part of the fixed shell 17 gradually contracts and wraps around the sliding block 10 under the compression of the gradient surface of the compression ring 15. After the lower side of the transmission frame 14 contacts the compression ring 15, the transmission frame 14 stops moving, the telescopic end of the electric push rod 12 stops extending and automatically closes, the fixed shell 17 stops deforming and completes the fixation of the sliding block 10.

[0042] During the downward movement of the aforementioned transmission frame 14, as the vibrating ring 19 moves downward, when the protrusion of the vibrating ring 19 contacts the transmission rod 20, the protrusion of the vibrating ring 19 squeezes the transmission rod 20, causing the transmission rod 20 to drive the trapezoidal block 22 downward and compress the third spring 21. At this time, the downward movement distance of the trapezoidal block 22 is small, and the trapezoidal block 22 does not contact the breaking rod 23. When the transmission rod 20 passes the protrusion of the vibrating ring 19, the third spring 21 pushes the transmission rod 20 to reset. As the vibrating ring 19 continues to move downward, the vertical movement amplitude of the transmission rod 20 increases. During this process, after the third spring 21 pushes the transmission rod 20 to reset, the upper side of the trapezoidal block 22 can contact the drill ring 7 until the transmission rod 20 contacts the lower side of the vibrating ring 19, at which point the vertical movement amplitude of the transmission rod 20 reaches its maximum. As the vibrating ring 19 continues to move downward, the upper side of the trapezoidal block 22 no longer contacts the drill ring 7. After the trapezoidal block 22 contacts the crushing rod 23, the trapezoidal block 22 squeezes the crushing rod 23, causing the crushing rod 23 to compress the second spring 24 and strike the concrete core. During this process, after the trapezoidal block 22 separates from the crushing rod 23, the second spring 24 pushes the crushing rod 23 to reset. As the vibrating ring 19 continues to move downward, the striking force of the crushing rod 23 on the concrete core increases until the transmission frame 14 stops moving. Then the vibrating ring 19 stops moving, and the striking force of the crushing rod 23 on the concrete core reaches its maximum. During this process, the drill barrel 6 rotates to adjust the position of the crushing rod 23 so that the concrete core is subjected to uniform force until the concrete core breaks. Then the operator turns off the power motor 4 and then rotates the threaded rod 2 in the opposite direction to drive the lifting frame 3 and other parts on it to move upward until the drill ring 7 is removed from the drill hole. Then the rotation of the threaded rod 2 stops, the drill barrel 6 and its parts stop rotating, and then the device is pushed to move the drill ring 7 out from above the drill hole.

[0043] After the drill ring 7 is removed from above the borehole, the operator will activate the electric push rod 12. The electric push rod 12 drives the adjusting frame 13 to move upward and reset. The adjusting frame 13 drives the transmission frame 14 and the vibration ring 19 to move upward and reset. The transmission frame 14 drives the fixed shell 17 to move upward. The downward pressure of the fixed shell 17 on the compression ring 15 is reduced. The compression ring 15 moves upward and reset under the pull of the tension spring 16. The fixed shell 17 moves upward relative to the sliding block 10, so that the fixed shell 17 gradually separates from the sliding block 10. After the two are separated, the shape of the fixed shell 17 returns to the state of fixing the sliding block 10. The fixed shell 17 and the compression ring 15 continue to move upward. After the tension spring 16 resets, the compression ring 15 stops moving. The fixed shell 17 moves upward relative to the compression ring 15. The shape of the fixed shell 17 gradually returns to the initial state. After the telescopic end of the electric push rod 12 is fully retracted, the fixed shell 17 stops moving and completes the reset.

[0044] After the fixed shell 17 separates from the sliding block 10, the first spring 101 pushes the sliding block 10 to reset, reducing the tension of the sliding block 10 on the wire rope 11. The wire rope 11 loosens and releases its fixation to the concrete core. The worker removes the concrete core, and the sliding shell 9 moves downward under the action of gravity until the lower side of the sliding shell 9 contacts the drill barrel 6. The sliding shell 9 then stops moving and completes its reset. The worker then repeats the above process to sample other locations to be tested.

[0045] Further, such as Figure 3 , Figure 4 , Figure 7 and Figure 9 As shown, it also includes: elastic ropes 25, which are symmetrically distributed and fixed to the drill ring 7. The drill ring 7 is provided with multiple arc-shaped grooves. The elastic ropes 25 are located in adjacent arc-shaped grooves on the drill ring 7. The elastic ropes 25 are used to fix the lower part of the concrete core. The drill barrel 6 is slidably connected to the drill ring 7.

[0046] Further, such as Figures 3-5 and Figures 7-9 As shown, the drill barrel 6 is fixed with the same number of baffles 26 as the elastic rope 25. The baffles 26 are slidably connected to the drill ring 7 and are used to compress the elastic rope 25.

[0047] Further, such as Figures 3-5 and Figures 7-9 As shown, the side of the baffle 26 away from the drill barrel 6 is an arc-shaped surface, and the distance between the middle of the arc-shaped surface of the baffle 26 and the drill barrel 6 is smaller than the distance between its two sides and the drill barrel 6.

[0048] The above provides a method for supporting the concrete core from below to prevent concrete from falling off. In this embodiment, there are two elastic ropes 25. Initially, the elastic ropes 25 are in a stretched state. The height of the arc groove on the drill ring 7 is flush with the height of the breaking rod 23. This allows the elastic ropes 25 to move directly below the concrete core under their own elasticity after the concrete core separates from the matrix. In this example, the drill ring 7 can slide up and down relative to the drill cylinder 6. Initially, the upper side of the drill ring 7 is in contact with the drill cylinder 6. Under the action of the third spring 21, the transmission rod 20 holds the drill ring 7 in place through the trapezoidal block 22, preventing the drill ring 7 from moving relative to the drill cylinder 6. The arc surface of the baffle 26 is concave upwards. The arc surface of the baffle 26 is used to squeeze the elastic rope 25, allowing the elastic rope 25 to enter the arc groove of the drill ring 7.

[0049] Workflow: During the core drilling process described above, the drill barrel 6 drives the drill ring 7 and baffle 26 to rotate. The drill ring 7 drives the elastic rope 25 and crushing block 8 to rotate. The crushing block 8 rotates and crushes the concrete upon contact with it. As the drill ring 7 penetrates deeper into the concrete, the drill barrel 6 stops moving downwards once it reaches a designated depth within the concrete. The electric push rod 12 starts and drives the vibrating ring 19 downwards. The vibrating ring 19, through the compression transmission rod 20, causes the trapezoidal block 22 to move downwards. The crushing rod 23 repeats the above process to crush the concrete core. At the bottom, the concrete core breaks from the bottom. The steel wire rope 11 repeats the above process to fix the concrete core. After the concrete core breaks, the operator turns off the electric push rod 12 and the power motor 4, and then rotates the threaded rod 2 in the opposite direction, so that the lifting frame 3 drives the drill barrel 6 to move upward and reset. The drill barrel 6 drives the trapezoidal block 22 to move and reset through the transmission rod 20. At this time, the upper side of the trapezoidal block 22 separates from the drill ring 7, and the trapezoidal block 22 releases the limit on the drill ring 7. As the drill barrel 6 drives its upper parts to move upward and reset, the drill ring 7 moves downward relative to the drill barrel 6 under its own gravity.

[0050] During the upward movement of the drill barrel 6, as the drill barrel 6 moves upward, it drives the baffle 26 to move upward relative to the drill ring 7, gradually releasing the pressure on the elastic rope 25. The elastic rope 25 contracts and moves to below the concrete core, supporting the concrete core from below and preventing the steel wire rope 11 from becoming unstable and falling off, thus avoiding damage to the concrete core upon impact. As the drill barrel 6 moves upward, when the upper side of the trapezoidal block 22 contacts the drill ring 7 again, the drill barrel 6 and the drill ring 7 stop moving relative to each other. The trapezoidal block 22 drives the drill ring 7 to move upward synchronously until the drill ring 7 moves above the concrete, at which point the workers stop. The rotating threaded rod 2 stops rotating, the drill barrel 6 and its parts stop moving, the worker pushes the moving frame 1 to move, so that the drill ring 7 moves away from above the drill hole, and then the worker starts the electric push rod 12. The telescopic end of the electric push rod 12 retracts and drives the adjusting frame 13 to move synchronously. The adjusting frame 13 drives the vibration ring 19 and the transmission frame 14 to move upward and reset. The transmission frame 14 drives the fixed shell 17 to move and release the fixation of the sliding block 10. The sliding block 10 resets under the push of the first spring 101 and reduces the tension on the wire rope 11, so that the pressure of the wire rope 11 on the concrete core is reduced, so that the concrete core is no longer squeezed by the wire rope 11 and automatically falls down after being fixed.

[0051] During the upward movement of the aforementioned vibrating ring 19, the third spring 21 drives the trapezoidal block 22 to move upward through the transmission rod 20, causing the trapezoidal block 22 to drive the drill ring 7 to move upward relative to the drill barrel 6. The drill ring 7 drives the elastic rope 25 to move upward relative to the baffle 26, causing the arc surface of the baffle 26 to squeeze the elastic rope 25. The elastic rope 25 stretches and resets until the upper side of the drill ring 7 contacts the drill barrel 6. Then, the drill ring 7 stops moving and completes the reset. The elastic rope 25 is removed from under the concrete core, and then the workers remove the concrete core from the drill barrel 6.

[0052] The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments.

Claims

1. A concrete core sampling device for engineering quality testing, characterized in that it comprises: A movable frame (1) is rotatably connected to a threaded rod (2); The lifting frame (3) is threaded to the threaded rod (2), the lifting frame (3) is slidably connected to the moving frame (1), and the lifting frame (3) is fixedly connected to the power motor (4) and the fixed frame (5). The drill barrel (6) is rotatably connected to the fixed frame (5), and the drill barrel (6) and the output shaft of the power motor (4) are driven by pulleys and belts; A drill ring (7) is disposed on the drill barrel (6), and circumferentially distributed broken blocks (8) are fixedly connected to the lower part of the drill ring (7). A sliding shell (9) is slidably connected inside the drill barrel (6). The sliding shell (9) is slidably connected with symmetrically distributed sliding blocks (10). A first spring (101) is fixed between the sliding blocks (10) and the sliding shell (9). The number of steel wire ropes (11) is the same as the number of sliding blocks (10), and they are fixed between the adjacent sliding blocks (10) and the drill barrel (6); The power assembly is mounted on the fixed frame (5) and is used to drive the symmetrically distributed sliding blocks (10) to move and tighten the steel wire rope (11) so that the steel wire rope (11) fixes the concrete core. The power assembly includes: An electric push rod (12) is fixedly connected to the fixed frame (5). An adjustment frame (13) is fixedly connected to the telescopic end of the electric push rod (12). The adjustment frame (13) is slidably and rotatably connected to the drill barrel (6). The transmission frame (14) is rotatably connected to the adjustment frame (13), and the transmission frame (14) is slidably connected to the drill barrel (6); A compression ring (15) is slidably connected to the drill barrel (6). The compression ring (15) is located on the moving path of the transmission frame (14). The side of the compression ring (15) near the sliding shell (9) is provided with an arc surface. The arc surface of the compression ring (15) is used to push all the sliding blocks (10) to move. A tension spring (16) is fixed between the compression ring (15) and the drill barrel (6). A breaking component, disposed on the drill ring (7), is used to break the concrete core; The transmission frame (14) is fixedly connected to a fixed shell (17) on the side near the sliding shell (9). The fixed shell (17) is slidably connected to the extrusion ring (15). The fixed shell (17) is used to fix the position of the sliding block (10). The side of the extrusion ring (15) near the fixed shell (17) is a gradient surface, and the diameter of the gradient surface on the extrusion ring (15) increases as the distance between it and the sliding shell (9) increases. This gradient surface is used to extrude the fixed shell (17) to deform it.

2. A concrete core sampling device for engineering quality testing according to claim 1, characterized in that, A buffer ring (18) is fixedly connected to the sliding shell (9), and the buffer ring (18) is located on the moving path of the compression ring (15).

3. A concrete core sampling device for engineering quality testing according to claim 1, characterized in that, The crushing component includes: A breaking rod (23) is slidably connected to the drill ring (7). One end of the breaking rod (23) near the central axis of the drill ring (7) is tapered to reduce the contact area between the breaking rod (23) and the concrete core. A second spring (24) is fixed between the breaking rod (23) and the drill ring (7). A transmission assembly, mounted on the adjustment frame (13), is used to push the crushing rod (23) to move.

4. A concrete core sampling device for engineering quality testing according to claim 3, characterized in that, It also includes the aforementioned transmission assembly: Vibration ring (19) is fixedly connected to the adjustment frame (13). The transmission rod (20) is slidably connected to the drill barrel (6), the transmission rod (20) is slidably connected to the drill ring (7), the vibration ring (19) is provided with evenly distributed protrusions, the protrusions of the vibration ring (19) are used to push the transmission rod (20) to move, and a third spring (21) is fixed between the transmission rod (20) and the drill barrel (6). A trapezoidal block (22) is fixed to the side of the transmission rod (20) away from the vibration ring (19). The trapezoidal block (22) is slidably connected to the drill ring (7). The trapezoidal block (22) is used to push the crushing rod (23) to move.

5. A concrete core sampling device for engineering quality testing according to claim 4, characterized in that, It also includes: Multiple elastic ropes (25) are symmetrically distributed and fixed to the drill ring (7). The drill ring (7) is provided with multiple arc grooves. The elastic ropes (25) are located in adjacent arc grooves on the drill ring (7). The elastic ropes (25) are used to fix the lower part of the concrete core. The drill barrel (6) is slidably connected to the drill ring (7).

6. A concrete core sampling device for engineering quality testing according to claim 5, characterized in that, The drill barrel (6) is fixed with the same number of baffles (26) as the elastic rope (25). The baffles (26) are slidably connected to the drill ring (7). The baffles (26) are used to squeeze the elastic rope (25).

7. A concrete core sampling device for engineering quality testing according to claim 6, characterized in that, The side of the baffle (26) away from the drill barrel (6) is an arc-shaped surface, and the distance between the middle part of the arc-shaped surface of the baffle (26) and the drill barrel (6) is smaller than the distance between its two sides and the drill barrel (6).

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