A clamping core-taking device and its usage method

Abstract

The present invention discloses a clamping core-taking device and its usage method, which relates to the technical field of foundation pile construction. The core-taking device includes a chassis symmetrically arranged in parallel on both sides, and a U-shaped frame is fixedly arranged on the two chassis on both sides; a wire winding wheel is rotatably arranged on the U-shaped frame, a rope is wound on the wire winding wheel, and a first motor for driving the wire winding wheel to rotate is also fixedly arranged on the U-shaped frame; the other end of the rope is fixed to the core-taking support, and a core-taking pipe is arranged on one side of the core-taking support; wherein, a positioning ring for sleeving outside the foundation pile is also fixedly arranged at the bottom of the core-taking support, the positioning ring is coaxially arranged with the core-taking pipe, and several groups of positioning seats for positioning the foundation pile are circumferentially arranged in an array on the inner side of the positioning ring; the core-taking pipe can always move along the central axis of the foundation pile, and the core-taking support and the positioning ring are fixed to each other. During the core-taking process, even if vibration occurs, since the position of the foundation pile is also fixed, the stability of the core-taking support is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pile construction, and particularly relates to a clamping coring device and a using method thereof. Background Art

[0002] Foundation pile coring, which is usually called core drilling inspection in the field of civil engineering, refers to drilling core samples of a certain depth on the surface of the pile body, and then analyzing and evaluating the integrity of the pile body according to the conditions of the core samples. In the process of foundation pile coring, a foundation pile coring machine needs to be used. The working principle of the foundation pile coring machine mainly utilizes the characteristics of low tensile and shear strengths of rocks. By applying an external force to break the "core sample", the purpose of coring and hole formation is achieved.

[0003] In the process of foundation pile coring, in order to ensure the accuracy of core sample detection, it is necessary to sample as close as possible to the central end position of the foundation pile. The position closer to the center of the pile body usually better represents the overall performance. This is because the concrete at the center position of the pile body is less affected by external factors during the pouring and curing processes and can better maintain its original performance. Moreover, foundation piles usually contain reinforcing materials such as steel bars, and these materials will interfere with sampling. If the sampling position is close to the steel bars, it may cause the extracted sample to contain steel bar fragments or be affected by the steel bars, thus affecting the accuracy of the test results.

[0004] Correspondingly, when the foundation pile coring equipment is working, the coring pipe needs to drill vertically downward to the ground. If the drill bit does not advance downward along the center, it will cause the drill hole to tilt. If the coring pipe does not advance downward along the center line, it will cause the drill hole to deviate from the predetermined trajectory, which will not only affect the accuracy of sampling, but also damage the steel reinforcement cage when it is severely tilted, resulting in losses.

[0005] For example, the patent document with the publication number CN112323875B discloses a foundation pile detection device and a detection method using the device, and also discloses the settings of a fixed cylinder and a detection component, which can detect whether the drill pipe is offset in real time to ensure that the drill pipe is always in a vertical state, achieving the effect of improving the integrity of core drilling;

[0006] It can be seen that in the prior art, in order to accurately position the fixed cylinder, it is necessary to use a level to pre-position each group of horizontal rods in advance, and the process is relatively cumbersome. Moreover, in the actual application process, since the ground at the foundation pile construction site is usually rough and uneven, the horizontal positioning difficulty is further increased, and the effect of rapid positioning cannot be achieved. At the same time, during the coring process, due to the vibration, when the ground soil around the foundation pile is relatively wet, the horizontal rods are easily shaken due to unstable positioning, and then the sampling cylinder will shift. Summary of the Invention

[0007] The purpose of the present invention is to provide a clamping coring device and a using method thereof, and solve the following technical problems:

[0008] 1) The existing technology requires the use of a level to pre-position each bracket, which is a cumbersome process; 2) During the sampling process, since the bracket is fixed on the soil, when the soil is relatively moist, the bracket will vibrate due to unstable positioning, affecting the normal movement of the sampling tube.

[0009] The purpose of the present invention can be achieved through the following technical solutions:

[0010] A clamping type coring device comprises two base frames arranged in parallel and symmetrical manner on both sides, and U-shaped frames are fixedly arranged on the two base frames;

[0011] A winding wheel is rotatably arranged on the U-shaped frame, a rope is wound on the winding wheel, and a first motor for driving the winding wheel to rotate is fixedly arranged on the U-shaped frame; the other end of the rope is fixed to the coring bracket, and a coring tube is arranged on one side of the coring bracket;

[0012] The bottom of the coring bracket is also fixedly provided with a positioning ring for sleeved on the outside of the foundation pile, the positioning ring is coaxially arranged with the coring tube, and a plurality of groups of positioning seats for positioning the foundation pile are arranged in a circumferential array inside the positioning ring;

[0013] The positioning ring is also provided with a positioning module, and the positioning module is used to drive each group of positioning seats to synchronously move toward or away from the axis of the positioning ring.

[0014] Preferably, a screw is rotatably arranged at the bottom of the coring bracket, the screw is fixed to the output end of the second motor fixedly arranged on the coring bracket, a coring support is spirally sleeved on the screw, the coring tube is rotatably arranged on one side of the bottom of the coring support, and a third motor is also fixedly arranged on the coring support, and the output end of the third motor is transmission connected to the coring tube through a sprocket mechanism.

[0015] Preferably, one end of the screw rod away from the coring bracket is rotatably connected to the limiting bracket, and the limiting bracket is fixed to the positioning ring through the connecting bracket;

[0016] Wherein, guide rods are symmetrically fixedly arranged on both sides of the limit frame, and both ends of the core support are slidably connected to the guide rods.

[0017] Preferably, the inner surface of the positioning ring is fixedly provided with a plurality of guide seats corresponding to the positioning seats in a circumferential array, the guide seats are provided with guide grooves, pins are slidably embedded in the guide grooves, and a positioning plate fixedly provided on the pins and fixedly connected to the positioning seats.

[0018] Preferably, the positioning module comprises a driving ring rotatably arranged on the positioning ring, the driving ring and the positioning ring are arranged coaxially, a plurality of arc grooves corresponding to the guide grooves are arranged in a circumferential array on the driving ring, the arc grooves extend from the proximal ring center end to the distal ring center end, and the pin shaft is slidably arranged in the arc groove;

[0019] Among them, an annular tooth is fixedly arranged on the outer edge surface of the driving ring, a fourth motor is fixedly arranged at the bottom of one side of the positioning ring, and a gear meshing with the annular tooth is fixedly arranged at the output end of the fourth motor.

[0020] Preferably, at least two groups of limiting grooves are arranged in the vertical direction along the direction of each positioning seat approaching the axis of the positioning ring. A first support is slidably embedded in the limiting groove, a second support is fixedly arranged at the bottom of the limiting groove, a first electrode plate is fixedly arranged on the side of the first support approaching the second support, a second electrode plate is correspondingly arranged on the second support, and the first electrode plate and the second electrode plate are electrically connected to the warning device through a controller.

[0021] Preferably, limiting cylinders are symmetrically and fixedly arranged on both sides in the limiting groove. Limiting seats are fixedly arranged on both sides of the first support, and a limiting rod fixed to the limiting seat is slidably inserted into the limiting cylinder;

[0022] Among them, a first spring is arranged on the limiting rod.

[0023] Preferably, a limiting stop seat is fixedly arranged on each positioning seat along the direction approaching the axis of the positioning ring. A through groove is arranged on the limiting stop seat, a wedge-shaped seat is slidably embedded in the through groove, an inclined guide surface is arranged at the bottom of the wedge-shaped seat along the direction approaching the axis of the positioning ring, and a third electrode plate is fixedly arranged on the wedge-shaped seat;

[0024] Among them, an L-shaped limiting frame is also fixedly arranged on the positioning seat, a third support is fixedly arranged at the end of the L-shaped limiting frame, a fourth electrode plate is fixedly arranged at one end of the third support facing the limiting stop seat, and the third electrode plate and the fourth electrode plate are electrically connected to the warning device through a controller.

[0025] Preferably, a guide post is also fixedly arranged on the limiting stop seat, and a guide plate fixed to the wedge-shaped seat is slidably arranged on the guide post;

[0026] Among them, a second spring is arranged on the guide post.

[0027] A using method of a clamping core-taking device includes the following steps:

[0028] Move the core-taking device to one side of the foundation pile so that the two bottom frames are respectively located on both sides of the foundation pile;

[0029] Start the first motor to drive the wire winding wheel to rotate for unwinding operation. The rope drives the core-taking support to descend, so that the positioning ring descends to the outside of the foundation pile;

[0030] The positioning module synchronously drives each positioning seat to move towards the direction close to the axis end of the positioning ring. Since the positioning seats are circumferentially arranged in the positioning ring, when each positioning seat is in close contact with the outer edge surface of the foundation pile, the axis end of the positioning ring coincides with the central axis end of the foundation pile;

[0031] Drive the core barrel to drill and take core downward along the central axis of the foundation pile.

[0032] Advantages of the present invention:

[0033] (1) Before sampling the foundation pile, the core sampling device is first moved to one side of the foundation pile so that the two bottom frames are respectively located on both sides of the foundation pile. Secondly, the first motor is started to drive the wire winding wheel to rotate for unwinding operation, so as to drive the core sampling bracket to descend through the rope, so that the positioning ring descends to the outside of the foundation pile. Then, the positioning module synchronously drives each positioning seat to move towards the direction close to the axial end of the positioning ring. When each positioning seat is in close contact with the outer edge surface of the foundation pile, since the positioning seats are circumferentially arranged in the positioning ring and the axial end of the positioning ring coincides with the central axis of the foundation pile, that is, it means that the core barrel coincides with the central axis of the foundation pile. During core sampling, the core barrel can always move along the central axis of the foundation pile. At the same time, since each positioning seat clamps on the foundation pile and the core sampling bracket is fixed to the positioning ring, during the core sampling process, even if vibration occurs, since the position of the foundation pile is also fixed, the stability of the core sampling bracket is ensured. Therefore, the core barrel will not be offset and can always move along the central axis of the foundation pile;

[0034] (2) When each positioning seat in the present invention moves towards the foundation pile, the first support seat first abuts against the outer edge surface of the foundation pile. As the positioning seat continues to move, it can press the first support seat to move towards the limiting groove until the first electrode piece is in contact with the second electrode piece and generates an electrical signal. The electrical signal can be sent to the warning device through the controller, and then it can be judged whether the positioning seat is tightly clamped and attached to the foundation pile; since there are multiple groups of positioning seats, only when the warning devices corresponding to each positioning seat generate warning signals can it indicate that the clamping is completed. If any one of the warning devices does not generate a warning signal, reclamping is required. Since the positioning seat has a certain length, the present invention can judge whether the positioning seat is completely attached to the foundation pile by opening at least two groups of limiting grooves on each group of positioning seats;

[0035] (3) When each positioning seat in the present invention moves towards the foundation pile, the inclined guide surface of the wedge-shaped seat first contacts the top surface of the foundation pile. As the positioning seat continues to move, based on the limiting effect of the top surface of the foundation pile, the wedge-shaped seat can be pushed to rise until the third electrode piece is in contact with the fourth electrode piece and generates an electrical signal. The electrical signal can be sent to the warning device through the controller, and then it can be judged whether the limiting block seat is in contact with the top surface of the foundation pile. The present invention can indicate that the clamping is completed only when the warning devices corresponding to each limiting block seat generate warning signals. If any one of the warning devices does not generate a warning signal, reclamping is required; by setting the limiting block seat, the present invention can further improve the clamping density between the positioning seat and the foundation pile to avoid the phenomenon of the positioning seat offset caused by excessive vibration during the core sampling process. Description of the Drawings

[0036] The present invention will be further described below with reference to the accompanying drawings.

[0037] Figure 1 is a schematic structural diagram of a clamping core-taking device of the present invention;

[0038] Figure 2 is a schematic structural diagram of a wire winding wheel in a clamping core-taking device of the present invention;

[0039] Figure 3 is a schematic structural diagram of a core-taking pipe in a clamping core-taking device of the present invention;

[0040] Figure 4 is a schematic structural diagram of a positioning ring in a clamping core-taking device of the present invention;

[0041] Figure 5 is a schematic sectional view of a positioning ring in a clamping core-taking device of the present invention;

[0042] Figure 6 is a schematic sectional view of a positioning seat in a clamping core-taking device of the present invention;

[0043] Figure 7 is a schematic structural diagram of a clamping core-taking device of the present invention when positioning a circular foundation pile;

[0044] Figure 8 is a schematic structural diagram of a clamping core-taking device of the present invention when positioning a square foundation pile;

[0045] Figure 9 is a schematic structural diagram of a limiting cylinder in a clamping core-taking device of the present invention;

[0046] Figure 10 is a schematic structural diagram of a positioning seat before clamping in a clamping core-taking device of the present invention;

[0047] Figure 11 is a schematic structural diagram of a positioning seat after clamping in a clamping core-taking device of the present invention.

[0048] In the figure: 1, base pile; 2, chassis; 3, wire winding wheel; 4, core sampling support; 5, screw; 6, drive ring; 7, positioning seat; 8, limit retaining seat; 201, U-shaped frame; 301, first motor; 302, rope; 401, second motor; 402, third motor; 403, guide rod; 404, core sampling support seat; 405, core sampling tube; 406, sprocket mechanism; 501, limit frame; 502, connecting frame; 503, guide seat; 504, guide groove; 505, limit protrusion; 601, positioning ring; 602, fourth motor; 603, gear; 604, arc groove; 605, pin shaft; 606, positioning plate; 607, annular tooth; 701, limit groove; 702, first support; 703, second support; 704, second electrode plate; 705, first electrode plate; 706, limit cylinder; 707, limit rod; 708, first spring; 709, limit seat; 801, through groove; 802, wedge-shaped seat; 803, inclined guide surface; 804, third electrode plate; 805, fourth electrode plate; 806, third support; 807, L-shaped limit frame; 808, guide plate; 809, guide post; 810, second spring. Detailed implementation mode

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0050] Embodiment 1

[0051] Please refer to Figure 1 And Figure 2 As shown, the present invention is a clamping type core sampling device, including chassis 2 symmetrically arranged in parallel on both sides, and U-shaped frames 201 are fixedly arranged on the two chassis 2; specifically, the chassis 2 and the U-shaped frames 201 are fixed by bolts or welding, and the specific connection method between the two is not limited in this embodiment.

[0052] A wire winding wheel 3 is rotatably arranged on the U-shaped frame 201, a rope 302 is wound on the wire winding wheel 3, and a first motor 301 for driving the wire winding wheel 3 to rotate is also fixedly arranged on the U-shaped frame 201; specifically, in this embodiment, by driving the wire winding wheel 3 to rotate clockwise or counterclockwise by the first motor 301, the effect of winding or unwinding the rope 302 on the wire winding wheel 3 can be achieved.

[0053] The other end of the rope 302 is fixed to the core sampling support 4, and a core sampling tube 405 for sampling is arranged on one side of the core sampling support 4;

[0054] Among them, a positioning ring 601 for sleeving outside the foundation pile 1 is fixedly arranged at the bottom of the core sampling support 4. The positioning ring 601 is coaxially arranged with the core sampling pipe 405. A plurality of groups of positioning seats 7 for positioning the foundation pile 1 are circumferentially arranged in an array on the inner side of the positioning ring 601. A positioning module is also arranged on the positioning ring 601, and the positioning module is used to drive each group of positioning seats 7 to move synchronously towards or away from the axis direction of the positioning ring 601;

[0055] In this embodiment, four groups of positioning seats 7 are arranged, and six groups or eight groups can also be arranged, and the specific quantity is not limited;

[0056] It can be explained that before sampling the foundation pile 1 in this embodiment, first move the core sampling device to one side of the foundation pile 1 so that the two bottom frames 2 are respectively located on both sides of the foundation pile 1. Secondly, start the first motor 301 to drive the winding wheel 3 to rotate for unwinding operation, so as to drive the core sampling support 4 to descend through the rope 302, so that the positioning ring 601 descends to the outside of the foundation pile 1. Then, synchronously drive each positioning seat 7 to move towards the direction close to the axis end of the positioning ring 601 through the positioning module. When each positioning seat 7 is in close contact with the outer edge surface of the foundation pile 1, the axis end of the positioning ring 601 coincides with the central axis end of the foundation pile 1, that is, it means that the core sampling pipe 405 coincides with the central axis end of the foundation pile 1. During core sampling, the core sampling pipe 405 always moves along the central axis end of the foundation pile 1. During this process, because each positioning seat 7 clamps on the foundation pile 1 and the core sampling support 4 and the positioning ring 601 are fixed to each other, during the core sampling process, even if vibration occurs, since the position of the foundation pile 1 is fixed, the stability of the core sampling support 4 is ensured, so the core sampling pipe 405 will not produce an offset phenomenon and can always move along the central axis end of the foundation pile 1.

[0057] It should also be noted that before each positioning seat 7 of this embodiment clamps towards the foundation pile 1 synchronously, although the bottom frame 2 is on rough ground or the axis end of the positioning ring 601 does not coincide with the central axis end of the foundation pile 1, but as each positioning seat 7 moves towards the foundation pile 1, since the core sampling support 4 is fixed by lifting through the rope 302, the core sampling support 4 can move in any direction. Therefore, in this embodiment, the first motor 301 can be driven to rotate the winding wheel 3 to unwind a certain length of the rope 302. When the positioning seat 7 clamps the foundation pile 1, the core sampling support 4 can move with the movement of the positioning seat 7 until each group of positioning seats 7 circumferentially clamps on the outer edge surface of the foundation pile 1 and stops;

[0058] In addition, before each positioning seat 7 of this embodiment clamps the foundation pile 1, the construction personnel can pre-adjust the axis line of the positioning ring 601 to be as close as possible to the central axis end of the foundation pile 1, so as to facilitate the quick clamping and positioning of each positioning seat 7 on the foundation pile 1.

[0059] It can be referred to Figures 7 - 8, the core sampling device of this embodiment can be applied to circular or square foundation piles, with a wider scope of application.

[0060] Embodiment 2

[0061] Based on Embodiment 1, please refer to Figures 3 - 4 , a screw rod 5 is rotatably arranged at the bottom of the core sampling support 4, the screw rod 5 is fixed to the output end of a second motor 401 fixedly arranged on the core sampling support 4, a core sampling support seat 404 is sleeved on the screw rod 5 in a spiral manner, a core sampling tube 405 is rotatably arranged on one side of the bottom of the core sampling support seat 404, a third motor 402 is also fixedly arranged on the core sampling support seat 404, and the output end of the third motor 402 is in transmission connection with the core sampling tube 405 through a sprocket mechanism 406; it can be explained that in the process of core sampling in this embodiment, first, the third motor 402 is started, and the third motor 402 drives the core sampling tube 405 to rotate through the sprocket mechanism 406. During this process, the second motor 401 is started to drive the screw rod 5 to rotate, and the core sampling support seat 404 can synchronously drive the core sampling tube 405 to move during the movement of the core sampling support seat 404 on the screw rod 5, so as to drive the core sampling tube 405 to drill and take core downward along the central axis of the foundation pile 1 while rotating.

[0062] In this embodiment, please refer to Figure 1 , one end of the screw rod 5 away from the core sampling support 4 is rotatably connected to a limit frame 501, the limit frame 501 is fixed to a positioning ring 601 through a connecting frame 502. Among them, guide rods 403 are symmetrically and fixedly arranged on both sides of the limit frame 501, and both ends of the core sampling support seat 404 are slidably connected to the guide rods 403; it should be noted that the core sampling support seat 404 can synchronously slide along the guide rods 403 during the movement on the screw rod 5, so as to guide and limit the core sampling support seat 404 and improve its stability during movement.

[0063] As a further solution of this embodiment, please refer to Figures 3 - 4 , a plurality of groups of guide seats 503 corresponding to the positioning seats 7 are fixedly arranged in a circumferential array on the inner peripheral surface of the positioning ring 601, a guide groove 504 is opened on the guide seat 503, a pin shaft 605 is slidably embedded in the guide groove 504, and a positioning plate 606 fixedly connected to the positioning seat 7 is fixedly arranged on the pin shaft 605; specifically, when the positioning module drives the positioning seats 7 to move synchronously, the positioning seats 7 can synchronously drive the pin shaft 605 to slide in the guide groove 504 through the positioning plate 606, so as to achieve the effects of guiding and limiting and improve the stability of the positioning seats 7 during movement.

[0064] Correspondingly, a limit protrusion 505 is fixedly arranged at the bottom end of the pin shaft 605, and the diameter of the limit protrusion 505 is greater than the groove width of the guide groove 504 to prevent the pin shaft 605 from disengaging from the guide groove 504.

[0065] Please refer to Figures 3 - 5, the positioning module includes a driving ring 6 rotatably arranged on a positioning ring 601. The driving ring 6 is coaxially arranged with the positioning ring 601. A plurality of groups of arc-shaped grooves 604 corresponding to the guide grooves 504 one by one are circumferentially arrayed on the driving ring 6. The arc-shaped grooves 604 extend from the near-center end to the far-center end. A pin shaft 605 is slidably inserted into the arc-shaped groove 604. Among them, an annular gear 607 is fixedly arranged on the outer edge surface of the driving ring 6, and a fourth motor 602 is fixedly arranged at the bottom of one side of the positioning ring 601. A gear 603 meshing with the annular gear 607 is fixedly arranged at the output end of the fourth motor 602. It can be explained that when driving the positioning seats 7 to move synchronously in this embodiment, first, the fourth motor 602 drives the gear 603 to rotate. The gear 603 can drive the driving ring 6 to rotate by meshing with the annular gear 607. During the rotation of the driving ring 6, based on the limiting effect of the arc-shaped groove 604, the pin shaft 605 can be driven to slide in the guide groove 504, thereby achieving the effect of driving the positioning seats 7 to move synchronously.

[0066] Please refer to Figures 5 - 6 and Figure 9 , when driving the positioning seats 7 to synchronously clamp towards the direction of the foundation pile 1, in order to ensure that each positioning seat 7 is tightly clamped and attached to the foundation pile 1, as a further solution of this embodiment, at least two groups of limiting grooves 701 are opened in the vertical direction along the direction of each positioning seat 7 towards the axis of the positioning ring 601. A first support 702 is slidably embedded in the limiting groove 701. A second support 703 is fixedly arranged at the bottom of the limiting groove 701. A first electrode plate 705 is fixedly arranged on the side of the first support 702 facing the second support 703. A second electrode plate 704 is correspondingly arranged on the second support 703. The first electrode plate 705 and the second electrode plate 704 are electrically connected to a warning device through a controller. It can be explained that in the initial state, please refer to Figure 10 , the first support 702 protrudes outside the limiting groove 701. When driving the positioning seats 7 to move towards the direction of the foundation pile 1, the first support 702 first abuts against the outer edge surface of the foundation pile 1. As the positioning seat 7 continues to move, the first support 702 can be pressed to move towards the inside of the limiting groove 701 until the first electrode plate 705 and the second electrode plate 704 are attached and generate an electrical signal (please refer to Figure 11 ), and the electrical signal can be sent to the warning device through the controller, and then it can be judged whether the positioning seat 7 is tightly clamped and attached to the foundation pile 1;

[0067] Specifically, since there are multiple groups of positioning seats 7 in this embodiment, the warning signals generated by the warning devices corresponding to each positioning seat 7 can represent that the clamping is completed. If any group of warning devices does not generate a warning signal, re-clamping is required. At the same time, since the positioning seat 7 has a certain length, by opening at least two groups of limiting grooves 701 on each group of positioning seats 7, it can be judged whether the positioning seat 7 is completely attached to the foundation pile 1.

[0068] After the sampling is completed, when the positioning seat 7 is separated from the foundation pile 1, in order to facilitate the reset of each first support 702, in this embodiment, reference can be made to Figure 9 , on both sides of the limiting groove 701, limiting cylinders 706 are symmetrically and fixedly arranged respectively. On both sides of the first support 702, limiting seats 709 are fixedly arranged respectively. A limiting rod 707 fixed to the limiting seat 709 is slidably inserted in the limiting cylinder 706. Among them, a first spring 708 is arranged on the limiting rod 707. One end of the first spring 708 is fixed to the limiting cylinder 706, and the other end is fixed to the limiting seat 709. It can be explained that when the first support 702 of this embodiment slides in the limiting groove 701, the limiting rod 707 can be driven by the limiting seat 709 to slide on one side of the limiting cylinder 706, thereby compressing the first spring 708 and generating elastic force, so as to facilitate the subsequent reset of the first support 702.

[0069] In addition, when each positioning seat 7 clamps the foundation pile 1, since the first spring 708 gives the first support 702 an elastic force towards the direction away from the second support 703, the friction between the positioning seat 7 and the foundation pile 1 can be further increased, making the clamping density between the two higher.

[0070] When each positioning seat 7 clamps the foundation pile 1, in order to further improve the accuracy during clamping, in this embodiment, a limiting stop seat 8 is fixedly arranged on each positioning seat 7 in the direction towards the axis of the positioning ring 601. A through groove 801 is opened on the limiting stop seat 8. A wedge-shaped seat 802 is slidably embedded in the through groove 801. An inclined guide surface 803 is opened at the bottom of the wedge-shaped seat 802 in the direction towards the axis of the positioning ring 601. A third electrode plate 804 is fixedly arranged on the wedge-shaped seat 802. Among them, an L-shaped limiting frame 807 is also fixedly arranged on the positioning seat 7. A third support 806 is fixedly arranged at the end of the L-shaped limiting frame 807. A fourth electrode plate 805 is fixedly arranged at one end of the third support 806 facing the limiting stop seat 8. The third electrode plate 804 and the fourth electrode plate 805 are electrically connected to the warning device through a controller. It can be explained that reference can be made to Figures 10 - 11 , in the initial state, the wedge-shaped seat 802 protrudes downward outside the through groove 801. When the positioning seat 7 moves towards the foundation pile 1, the inclined guide surface 803 of the wedge-shaped seat 802 first contacts the top surface of the foundation pile 1. As the positioning seat 7 continues to move, based on the limiting effect of the top surface of the foundation pile 1, the wedge-shaped seat 802 can be pushed to rise until the third electrode plate 804 and the fourth electrode plate 805 are in contact and generate an electrical signal. The electrical signal can be sent to the warning device through the controller, and then it can be judged whether the limiting stop seat 8 is in contact with the top surface of the foundation pile 1;

[0071] Correspondingly, in this embodiment, it can be indicated that the clamping is completed only when warning signals are generated by all the warning devices corresponding to the limiting blocks 8. If any group of warning devices does not generate warning signals, the clamping needs to be performed again.

[0072] It should also be noted that by providing the limiting blocks 8 in this embodiment, the clamping density between the positioning seat 7 and the foundation pile 1 can be further improved to avoid the phenomenon that the positioning seat 7 is displaced due to excessive vibration during the core extraction process.

[0073] It can be referred to Figure 6 , a guide post 809 is also fixedly arranged on the limiting block 8, and a guide plate 808 fixed to the wedge-shaped seat 802 is slidably arranged on the guide post 809. Among them, a second spring 810 is arranged on the guide post 809. One end of the second spring 810 is fixed to the limiting block 8, and the other end is fixed to the guide plate 808. It can be explained that when the wedge-shaped seat 802 contracts into the through groove 801, the second spring 810 can be synchronously driven by the guide plate 808 to stretch and generate elastic force. When the limiting block 8 is separated from the foundation pile 1, the second spring 810 can drive the wedge-shaped seat 802 to reset.

[0074] A usage method of a clamping core extraction device includes the following steps:

[0075] Please refer to Figure 1 and Figures 3 - 4 , S1. Move the core extraction device to one side of the foundation pile 1 so that the two bottom frames 2 are respectively located on both sides of the foundation pile 1;

[0076] S2. Start the first motor 301 to drive the winding wheel 3 to perform a pay-out operation, so as to drive the core extraction support 4 to descend through the rope 302, so that the positioning ring 601 descends to the outside of the foundation pile 1;

[0077] S3. The positioning module synchronously drives each positioning seat 7 to move towards the direction close to the axial end of the positioning ring 601. Since the positioning seats 7 are circumferentially arranged in the positioning ring 601, when each positioning seat 7 is in close contact with the outer edge surface of the foundation pile 1, the axial end of the positioning ring 601 coincides with the central axis of the foundation pile 1;

[0078] S4. Drive the core extraction pipe 405 to drill and extract the core along the central axis of the foundation pile 1.

[0079] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it should not be construed as a limitation of the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0080] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] The above has described in detail an embodiment of the present invention, but the content described is only a preferred embodiment of the present invention and cannot be considered as used to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A clamping type coring device, comprising two base frames (2) arranged in parallel and symmetrically on both sides, and U-shaped frames (201) are fixedly arranged on the two base frames (2); It is characterized in that A winding wheel (3) is rotatably arranged on the U-shaped frame (201), a rope (302) is wound around the winding wheel (3), and a first motor (301) for driving the winding wheel (3) to rotate is also fixedly arranged on the U-shaped frame (201); the other end of the rope (302) is fixed to a coring bracket (4), and a coring tube (405) is provided on one side of the coring bracket (4); The bottom of the coring support (4) is also fixedly provided with a positioning ring (601) for sleeved on the outside of the foundation pile (1); the positioning ring (601) is coaxially arranged with the coring tube (405); and a plurality of groups of positioning seats (7) for positioning the foundation pile (1) are arranged in a circumferential array on the inner side of the positioning ring (601); The positioning ring (601) is also provided with a positioning module, and the positioning module is used to drive each group of positioning seats (7) to synchronously move toward or away from the axis of the positioning ring (601); each of the positioning seats (7) is provided with at least two groups of limiting grooves (701) in the vertical direction in the direction close to the axis of the positioning ring (601), a first support (702) is slidably embedded in the limiting groove (701), a second support (703) is fixedly arranged at the bottom of the limiting groove (701), a first electrode sheet (705) is fixedly arranged on one side of the first support (702) close to the second support (703), and a second electrode sheet (704) is correspondingly arranged on the second support (703), and the first electrode sheet (705) and the second electrode sheet (704) are electrically connected to the alarm through a controller; The limiting cylinders (706) are symmetrically fixedly arranged on both sides of the limiting groove (701), the limiting seats (709) are fixedly arranged on both sides of the first support (702), and a limiting rod (707) fixed to the limiting seat (709) is slidably inserted in the limiting cylinder (706); a first spring (708) is arranged on the limiting rod (707).

2. The core-taking device with a clamping type according to claim 1, characterized in that, A screw rod (5) is rotatably arranged at the bottom of the coring support (4), the screw rod (5) is fixed to the output end of a second motor (401) fixedly arranged on the coring support (4), a coring support (404) is spirally sleeved on the screw rod (5), a coring tube (405) is rotatably arranged at one side of the bottom of the coring support (404), a third motor (402) is also fixedly arranged on the coring support (404), and the output end of the third motor (402) is transmission-connected to the coring tube (405) via a sprocket mechanism (406).

3. The core clamping device according to claim 2, characterized in that, One end of the screw rod (5) away from the coring support (4) is rotatably connected to the limiting frame (501), and the limiting frame (501) is fixed to the positioning ring (601) via the connecting frame (502); Wherein, guide rods (403) are symmetrically fixedly arranged on both sides of the limiting frame (501), and both ends of the core taking support (404) are slidably connected to the guide rods (403).

4. A clamping core-taking device according to claim 1, wherein, A plurality of guiding seats (503) corresponding to the positioning seats (7) one by one are fixedly arranged in a circumferential array along the inner edge surface of the positioning ring (601). A guiding groove (504) is formed in the guiding seat (503), and a pin shaft (605) is slidably embedded in the guiding groove (504). A positioning plate (606) fixedly connected to the positioning seat (7) is fixedly arranged on the pin shaft (605).

5. The core clamping device according to claim 4, characterized in that, The positioning module includes a driving ring (6) rotatably arranged on the positioning ring (601). The driving ring (6) and the positioning ring (601) are coaxially arranged. A plurality of arc-shaped grooves (604) corresponding to the guiding grooves (504) one by one are formed in a circumferential array on the driving ring (6). The arc-shaped grooves (604) extend from the near center end to the far center end. The pin shaft (605) slidably penetrates through the arc-shaped grooves (604). Wherein, an annular gear (607) is fixedly arranged on the outer edge surface of the driving ring (6), and a fourth motor (602) is fixedly arranged at the bottom of one side of the positioning ring (601). A gear (603) meshing with the annular gear (607) is fixedly arranged at the output end of the fourth motor (602).

6. The core clamping device according to claim 1, wherein A limiting stop seat (8) is fixedly arranged on each positioning seat (7) in the direction towards the axis of the positioning ring (601). A through groove (801) is formed in the limiting stop seat (8), and a wedge-shaped seat (802) is slidably embedded in the through groove (801). An inclined guiding surface (803) is formed at the bottom of the wedge-shaped seat (802) in the direction towards the axis of the positioning ring (601). A third electrode plate (804) is fixedly arranged on the wedge-shaped seat (802). Wherein, an L-shaped limiting frame (807) is also fixedly arranged on the positioning seat (7). A third support (806) is fixedly arranged at the end of the L-shaped limiting frame (807). A fourth electrode plate (805) is fixedly arranged at one end of the third support (806) facing the limiting stop seat (8). The third electrode plate (804) and the fourth electrode plate (805) are electrically connected to the warning device through a controller.

7. The core clamping device according to claim 6, characterized in that, A guide post (809) is also fixedly arranged on the limiting stop seat (8), and a guide plate (808) fixed to the wedge-shaped seat (802) is slidably arranged on the guide post (809). Wherein, a second spring (810) is arranged on the guide post (809).

8. A method for using a clamping core-taking device as described in any one of claims 1-7, characterized in that, Including the following steps: Move the core sampling device to one side of the foundation pile (1) so that the two bottom frames (2) are respectively located on both sides of the foundation pile (1). Start the first motor (301) to drive the wire winding wheel (3) to rotate for unwinding operation. The rope (302) drives the core sampling support (4) to descend, so that the positioning ring (601) descends to the outside of the foundation pile (1). The positioning module synchronously drives each positioning seat (7) to move towards the direction close to the axis end of the positioning ring (601). Since the positioning seats (7) are circumferentially arranged in the positioning ring (601), when each positioning seat (7) is in close contact with the outer edge surface of the foundation pile (1), the axis end of the positioning ring (601) coincides with the central axis end of the foundation pile (1). Drive the core sampling pipe (405) to drill and sample along the central axis end of the foundation pile (1).

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