Sediment thickness detection device for rotary digging pile

Abstract

The utility model discloses a kind of rotary excavating pile sediment thickness detection devices, it is related to sediment thickness detection technical field, including lowering mechanism, sling, detection cylinder, probe rod and push mechanism, the lowering mechanism is set on the ground outside pile hole, one end of the sling is connected in lowering mechanism, the other end of the sling is connected in detection cylinder top, the detection cylinder is lowered to inside pile hole, the detection cylinder bottom is fixedly connected with the measuring disc for contacting sediment surface, the probe rod is slippage and is arranged in the detection cylinder inside, the push mechanism is arranged in detection cylinder and is used to push the probe rod end out of the measuring disc of detection cylinder bottom and contact in pile hole bottom, the probe rod lower end is connected with bottom touch feedback mechanism. The present application has the effect of reducing measurement error.

Description

Technical Field

[0001] This application relates to the field of sediment thickness detection technology, and in particular to a device for detecting sediment thickness in rotary drilling piles. Background Technology

[0002] In rotary drilling pile construction, final hole acceptance is a crucial step in ensuring pile quality. Before lowering the reinforcing cage, the thickness of the sediment at the bottom of the hole should be quickly checked. According to relevant specifications, the sediment thickness at the bottom of the hole for end-bearing piles should be ≤50mm, while for friction piles it should be ≤100mm. An excessively thick sediment layer will significantly weaken the pile end bearing capacity (end-bearing piles) or the pile side friction (friction piles), leading to excessive pile settlement or insufficient bearing capacity, seriously threatening the safety of the superstructure.

[0003] The commonly used method for detecting sediment thickness in engineering practice is the manual hammer test. The principle is to lower a measuring rope with a weight into the hole and calculate the sediment thickness by measuring the difference in length between the bottom of the hole and when the weight touches the sediment surface.

[0004] However, the above measurement method relies entirely on the measurement personnel's sense of touch and experience to determine whether the hammer has reached the bottom of the hole or touched the surface of the sediment, which leads to a large error in the measurement results. Therefore, this application proposes a new technical solution. Utility Model Content

[0005] To reduce measurement errors, this application provides a device for detecting the thickness of sediment in rotary drilling piles.

[0006] This application provides a device for detecting the thickness of sediment in rotary drilling piles, which adopts the following technical solution:

[0007] A device for detecting the thickness of sediment in rotary drilling piles includes a lowering mechanism, a hoisting rope, a detection cylinder, a probe, and a pushing mechanism. The lowering mechanism is located on the ground outside the pile hole. One end of the hoisting rope is connected to the lowering mechanism, and the other end of the hoisting rope is connected to the top of the detection cylinder. The detection cylinder is lowered into the pile hole. A measuring plate for contacting the sediment surface is fixedly connected to the bottom of the detection cylinder. The probe slides through the inside of the detection cylinder. The pushing mechanism is located inside the detection cylinder and is used to push the end of the probe out of the measuring plate at the bottom of the detection cylinder and make it contact the bottom of the pile hole. A bottom-touching feedback mechanism is connected to the lower end of the probe.

[0008] Optionally, the pushing mechanism includes a pushing motor, a partition, a rotating rod, a pushing rod, and a limiting component. The inside of the detection cylinder is hollow. The partition is fixedly connected to the inner cavity of the detection cylinder. The pushing motor is fixedly connected to the upper surface of the partition. The rotating rod is rotatably connected to the lower surface of the partition. The output shaft of the pushing motor is coaxially fixed with the rotating rod. The pushing rod is threaded onto the rotating rod. The lower end of the pushing rod is fixedly connected to the top of the probe. The limiting component is connected between the inner wall of the detection cylinder and the pushing rod and is used to limit the rotation of the pushing rod.

[0009] Optionally, the limiting assembly includes a limiting rod arranged radially along the detection cylinder, and a groove is formed longitudinally on the inner wall of the detection cylinder for the end of the limiting rod to slide. One end of the limiting rod is fixedly connected to the outer wall of the push rod, and the other end of the limiting rod is slidably connected to the groove.

[0010] Optionally, the bottom-feedback mechanism includes a spring, a pressure ball, and a contact switch. The lower end of the probe has a through groove, and the inner wall of the through groove has a recess. One end of the spring is fixedly connected to the recess, and the other end of the spring is fixedly connected to the pressure ball. A contact rod slides through the through groove of the probe, the upper end of the contact rod abuts against the pressure ball, and the lower end of the contact rod extends out of the groove. The side wall of the contact rod has a slot for the pressure ball to be inserted. The contact switch is fixedly connected to the slot. When the pressure ball is inserted into the slot, the pressure ball contacts the contact switch.

[0011] Optionally, the contact rod is fixedly connected to a limiting block, and the inner wall of the through groove is provided with a limiting groove for the limiting block to slide and connect.

[0012] Optionally, an angle sensor is fixedly connected to the inner wall of the detection cylinder.

[0013] Optionally, the lowering mechanism includes a support base, a winding wheel, a winding motor, a guide wheel one, a guide wheel two, and a crossbeam. The support base is set on the ground, the winding wheel is rotatably connected to the support base, the winding motor is fixedly connected to the support base and its output shaft is coaxially fixed with the winding wheel, the crossbeam is located above the winding wheel and one end is fixedly connected to the top of the support base, and the other end extends horizontally away from the winding wheel. The guide wheel one and guide wheel two are rotatably connected to the two ends of the crossbeam, and one end of the lifting rope is fixedly connected to the wall of the winding wheel and the lifting rope is laid on the guide wheel one and guide wheel two.

[0014] Optionally, a telescopic frame is slidably connected to one end of the cross frame away from the take-up reel, a guide wheel is rotatably connected to one end of the cross frame near the take-up reel, a guide wheel is rotatably connected to one end of the telescopic frame away from the cross frame, and a fastener for fixing the position of the telescopic frame is provided between the telescopic frame and the cross frame.

[0015] In summary, this application includes the following beneficial technical effects: the detection cylinder is lowered into the pile hole by the lowering mechanism. When the measuring plate contacts the surface of the sediment, the pushing mechanism pushes the probe out of the detection cylinder, so that the probe gradually passes through the sediment layer and stops moving when it finally contacts the bottom of the pile hole. The position of the probe is locked. Then the detection cylinder is removed from the pile hole. The thickness of the sediment can be obtained by measuring the extension length of the probe, making the measurement results more accurate. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the overall structure of an embodiment of this application.

[0017] Figure 2 This is a schematic diagram of the internal structure of the detection cylinder in an embodiment of this application.

[0018] Figure 3 This is a schematic diagram of the bottoming feedback mechanism in the embodiments of this application.

[0019] Explanation of reference numerals in the attached drawings: 1. Lowering mechanism; 2. Suspension rope; 3. Detection cylinder; 4. Probe rod; 5. Pushing mechanism; 31. Measuring plate; 51. Pushing motor; 52. Partition plate; 53. Rotating rod; 54. Pushing rod; 55. Limiting rod; 6. Bottom-contact feedback mechanism; 61. Spring; 62. Pressure ball; 63. Groove; 64. Contact rod; 65. Limiting block; 66. Slot; 67. Contact switch; 11. Support base; 12. Rewinding wheel; 13. Rewinding motor; 14. Guide wheel one; 15. Guide wheel two; 16. Horizontal frame; 17. Telescopic frame. Detailed Implementation

[0020] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0021] This application discloses a device for detecting the thickness of sediment in rotary drilling piles.

[0022] Reference Figure 1 and Figure 2 The rotary drilling pile sediment thickness detection device includes a lowering mechanism 1, a hoisting rope 2, a detection cylinder 3, a probe 4, and a pushing mechanism 5. The lowering mechanism 1 is set on the ground outside the pile hole. One end of the hoisting rope 2 is connected to the lowering mechanism 1, and the other end of the hoisting rope 2 is connected to the top of the detection cylinder 3. The detection cylinder 3 is lowered into the pile hole through the lowering mechanism 1 and the hoisting rope 2. A measuring plate 31 for contacting the sediment surface is fixedly connected to the bottom of the detection cylinder 3. The diameter of the measuring plate 31 is larger than the diameter of the detection cylinder 3. The probe 4 slides vertically through the inside of the detection cylinder 3. The pushing mechanism 5 is set inside the detection cylinder 3. When the measuring plate 31 contacts the sediment surface, the pushing mechanism 5 pushes the probe 4 out of the measuring plate 31 at the bottom of the detection cylinder 3 and moves the probe 4 toward the bottom of the hole so that the end of the probe 4 contacts the bottom of the pile hole. The lower end of the probe 4 is connected to a bottom-contact feedback mechanism 6 for feedback on whether the lower end of the probe 4 contacts the bottom of the hole. When the bottom-contact feedback mechanism 6 detects that the lower end of the probe 4 contacts the bottom of the hole, the pushing mechanism 5 stops pushing.

[0023] In this embodiment, whether the measuring plate 31 is in contact with the sludge surface can be determined by visually judging whether the suspension rope 2 changes from a taut state to a slack state, or by installing a tension sensor on the suspension rope 2 to detect the tension change of the suspension rope 2 to determine whether the measuring plate 31 is in contact with the sludge surface. Tension sensors are existing technology, and those skilled in the art are capable of selecting appropriate installation and protection according to the function to be achieved, so they will not be described in detail here.

[0024] With the above setup, the detection cylinder 3 is lowered into the pile hole by the lowering mechanism 1. When the measuring plate 31 contacts the surface of the sediment, the staff operates the pushing mechanism 5 to push the probe 4 out of the detection cylinder 3, so that the probe 4 gradually passes through the sediment layer and stops moving when it finally contacts the bottom of the pile hole. The position of the probe 4 is locked. Then the detection cylinder 3 is removed from the pile hole. The thickness of the sediment can be obtained by measuring the extension length of the probe 4, making the measurement results more accurate.

[0025] Reference Figure 2 The pushing mechanism 5 includes a pushing motor 51, a partition 52, a rotating rod 53, a pushing rod 54, and a limiting component. The detection cylinder 3 is hollow inside. The partition 52 is fixedly connected to the inner wall of the detection cylinder 3. The pushing motor 51 is fixedly connected to the upper surface of the partition 52 by bolts. The rotating rod 53 is vertical and rotatably connected to the lower surface of the partition 52 by bearings. The output shaft of the pushing motor 51 is coaxially fixed with the rotating rod 53 and is used to drive the rotating rod 53 to rotate. The pushing rod 54 is threaded onto the outside of the rotating rod 53. The limiting component is connected between the inner wall of the detection cylinder 3 and the pushing rod 54 and is used to limit the rotation of the pushing rod 54. The lower end of the pushing rod 54 is fixedly connected to the top of the probe 4 and is used to push the probe 4 out from the inner cavity of the detection cylinder 3.

[0026] The limiting component includes a limiting rod 55 arranged radially along the detection cylinder 3. The inner wall of the detection cylinder 3 has a groove along the longitudinal direction for the end of the limiting rod 55 to slide. One end of the limiting rod 55 is fixedly connected to the outer wall of the push rod 54, and the other end of the limiting rod 55 slides in the groove. Thus, when the push motor 51 drives the rotating rod 53 to rotate, the push rod 54 can drive the probe rod 4 to move downward under the limiting action of the limiting rod 55.

[0027] It should be noted that, in order to facilitate the installation of the above-mentioned components inside the detection cylinder 3, a window needs to be opened on the side wall of the detection cylinder 3 and a sealing door for closing the window needs to be provided. A sealing strip is provided on the side of the sealing door and the edge of the window. Secondly, rod holes for the probe rod 4 to extend are opened at the bottom of the detection cylinder 3 and at the axis of the measuring plate 31. A sealing ring is provided on the edge of the rod hole to prevent mud from entering the detection cylinder 3 and causing pollution.

[0028] Reference Figure 3The bottom-feedback mechanism 6 includes a spring 61, a pressure ball 62, and a contact switch 67. A through groove is formed along the axial direction of the lower end of the probe rod 4. A groove 63 is formed radially along the inner wall of the through groove. One end of the spring 61 is fixedly connected to the bottom of the groove 63, and the other end of the spring 61 is fixedly connected to the side wall of the pressure ball 62. A contact rod 64 slides through the through groove of the probe rod 4. The sliding method involves fixing a limit block 65 to the side wall of the contact rod 64. A limiting groove is formed along the axial direction of the through groove along the inner wall of the through groove for the limit block 65 to slide and connect. The lower end of the contact rod 64 extends beyond the lower end face of the probe rod 4. In this embodiment, a sealing ring is provided between the lower end face of the probe rod 4, the edge of the through groove opening, and the outer wall of the contact rod 64.

[0029] When the contact rod 64 has not reached the bottom of the hole, its upper end face abuts against the arc-shaped surface of the pressure ball 62. A slot 66 is provided on the side wall of the contact rod 64 for the pressure ball 62 to be inserted into. The contact switch 67 is fixed within the slot 66, with its contacts facing the opening of the slot 66. When the contact rod 64 reaches the bottom of the hole, it stops moving, while the probe 4 continues to move downwards, applying force to the arc-shaped surface of the pressure ball 62. This causes the pressure ball 62 to compress the spring 61 and move towards the groove 63. As the probe 4 continues to move downwards... When the pressure ball 62 aligns with the slot 66, the spring force of the spring 61 causes the pressure ball 62 to engage in the slot 66, pressing against the contact point of the contact switch 67. The contact switch 67 triggers a signal, and the controller pre-installed in the detection cylinder 3 receives the signal, controlling the push motor 51 to stop, thus locking the extension amounts of the probe rod 4 and the contact rod 64. Then, the detection cylinder 3 is lifted out of the pile hole via the lowering mechanism 1, and the operator measures the extension amounts of the probe rod 4 and the contact rod 64. Since the extension amount of the contact rod 64 is fixed after locking, it is only necessary to measure the sum of the extension amounts of the probe rod 4 and the contact rod 64. Scale lines can be engraved on the probe rod 4 for the operator to visually determine its extension length.

[0030] In another embodiment of this application, considering that if the measuring disc 31 is tilted when it contacts the sediment surface after the detection cylinder 3 is lowered into the hole, it will affect the measurement results. Therefore, an inclination sensor (not shown in the figure) is fixedly connected to the inner wall of the detection cylinder 3 to detect the tilt of the detection cylinder 3. When the inclination value detected by the inclination sensor exceeds the preset threshold of the controller, it is considered that the tilt of the detection cylinder 3 exceeds the standard, and an alarm signal is output to the controller. The controller receives the alarm signal and controls the buzzer installed in advance on the ground to sound, prompting the ground staff to lift the detection cylinder 3 and lower it again. The contact switch 67, the controller and the inclination sensor mentioned above are all prior art. Wire holes can be opened in the contact rod 64, the probe rod 4, the push rod 54 and the detection cylinder 3 for the cables for signal transmission / power supply of the above devices to be run through and led out, and corresponding protection measures are taken for the cables.

[0031] Reference Figure 1 The lowering mechanism 1 includes a support base 11, a take-up reel 12, a take-up motor 13, a first guide wheel 14, a second guide wheel 15, and a crossbeam 16. The support base 11 is placed on the ground near the pile hole. The take-up reel 12 is rotatably connected to the support base 11 via bearings. The take-up motor 13 is fixed on the support base 11, and the output shaft of the take-up motor 13 is coaxially fixed with the take-up reel 12. The crossbeam 16 is located above the take-up reel 12, with one end fixed to the top of the support base 11, and the other end extending horizontally away from the take-up reel 12 and slidably connected to a horizontal telescopic frame 17. The telescopic frame 17 can be moved to adjust the total length of the crossbeam 16 and the telescopic frame 17. Fasteners for fixing the position of the telescopic frame 17 are provided between the telescopic frame 17 and the crossbeam 16. In this embodiment, the fasteners are bolts.

[0032] Guide wheel 14 is rotatably connected to the end of the cross frame 16 near the take-up wheel 12, and guide wheel 25 is rotatably connected to the end of the telescopic frame 17 away from the cross frame 16. One end of the suspension rope 2 is fixedly connected to the side wall of the take-up wheel 12, and the other end of the suspension rope 2 is suspended from the top of the detection cylinder 3 by connecting guide wheel 14 and guide wheel 2 15. The detection cylinder 3 is then lowered into the pile hole. This allows the total length of the telescopic frame 17 and the cross frame 16 to be adjusted according to the size of the pile hole, so that the detection cylinder 3 can be located as close to the center of the pile hole as possible, which is convenient for subsequent measurement.

[0033] 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 device for detecting the thickness of sediment in rotary drilling piles, characterized in that: The device includes a lowering mechanism (1), a hoisting rope (2), a detection cylinder (3), a probe (4), and a pushing mechanism (5). The lowering mechanism (1) is set on the ground outside the pile hole. One end of the hoisting rope (2) is connected to the lowering mechanism (1), and the other end of the hoisting rope (2) is connected to the top of the detection cylinder (3). The detection cylinder (3) is lowered into the pile hole. A measuring plate (31) for contacting the surface of sediment is fixedly connected to the bottom of the detection cylinder (3). The probe (4) slides through the inside of the detection cylinder (3). The pushing mechanism (5) is set inside the detection cylinder (3) and is used to push the end of the probe (4) out of the measuring plate (31) at the bottom of the detection cylinder (3) and contact the bottom of the pile hole. The lower end of the probe (4) is connected to a bottom-touching feedback mechanism (6).

2. The rotary drilling pile sediment thickness detection device according to claim 1, characterized in that: The pushing mechanism (5) includes a pushing motor (51), a partition (52), a rotating rod (53), a pushing rod (54), and a limiting component. The inside of the detection cylinder (3) is hollow. The partition (52) is fixedly connected to the inner cavity of the detection cylinder (3). The pushing motor (51) is fixedly connected to the upper surface of the partition (52). The rotating rod (53) is rotatably connected to the lower surface of the partition (52). The output shaft of the pushing motor (51) is coaxially fixed with the rotating rod (53). The pushing rod (54) is threaded onto the rotating rod (53). The lower end of the pushing rod (54) is fixedly connected to the top of the probe (4). The limiting component is connected between the inner wall of the detection cylinder (3) and the pushing rod (54) and is used to limit the rotation of the pushing rod (54).

3. The rotary drilling pile sediment thickness detection device according to claim 2, characterized in that: The limiting assembly includes a limiting rod (55) arranged radially along the detection cylinder (3). The inner wall of the detection cylinder (3) is provided with a sliding groove along the longitudinal direction for the end of the limiting rod (55) to slide. One end of the limiting rod (55) is fixedly connected to the outer wall of the push rod (54), and the other end of the limiting rod (55) is slidably connected to the sliding groove.

4. The rotary drilling pile sediment thickness detection device according to claim 1, characterized in that: The bottom-feedback mechanism (6) includes a spring (61), a pressure ball (62), and a contact switch (67). The lower end of the probe (4) is provided with a through groove, and the inner wall of the through groove is provided with a groove (63). One end of the spring (61) is fixedly connected to the groove (63), and the other end of the spring (61) is fixedly connected to the pressure ball (62). A contact rod (64) is slidably inserted through the through groove of the probe (4). The upper end of the contact rod (64) abuts against the pressure ball (62), and the lower end of the contact rod (64) extends out of the barrel groove. The side wall of the contact rod (64) is provided with a slot (66) for the pressure ball (62) to be inserted. The contact switch (67) is fixedly connected to the slot (66). When the pressure ball (62) is inserted into the slot (66), the pressure ball (62) contacts the contact switch (67).

5. The rotary drilling pile sediment thickness detection device according to claim 4, characterized in that: The contact rod (64) is fixedly connected to the limiting block (65), and the inner wall of the through groove is provided with a limiting groove for the limiting block (65) to slide and connect.

6. The rotary drilling pile sediment thickness detection device according to claim 1, characterized in that: An angle sensor is fixedly connected to the inner wall of the detection cylinder (3).

7. The rotary drilling pile sediment thickness detection device according to claim 1, characterized in that: The lowering mechanism (1) includes a support base (11), a winding wheel (12), a winding motor (13), a guide wheel one (14), a guide wheel two (15), and a cross frame (16). The support base (11) is set on the ground. The winding wheel (12) is rotatably connected to the support base (11). The winding motor (13) is fixedly connected to the support base (11), and its output shaft is coaxially fixed with the winding wheel (12). The cross frame (16) is located above the winding wheel (12), and one end of it is fixedly connected to the top of the support base (11). The other end extends horizontally away from the winding wheel (12). The guide wheel one (14) and the guide wheel two (15) are rotatably connected to the two ends of the cross frame (16). One end of the hoisting rope (2) is fixedly connected to the wall of the winding wheel (12), and the hoisting rope (2) is laid on the guide wheel one (14) and the guide wheel two (15).

8. The rotary drilling pile sediment thickness detection device according to claim 7, characterized in that: The cross frame (16) is slidably connected to the telescopic frame (17) at the end away from the winding wheel (12). The first guide wheel (14) is rotatably connected to the end of the cross frame (16) near the winding wheel (12). The second guide wheel (15) is rotatably connected to the end of the telescopic frame (17) away from the cross frame (16). Fasteners for fixing the position of the telescopic frame (17) are provided between the telescopic frame (17) and the cross frame (16).

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