A pile hole diameter detection device for road and bridge construction

Abstract

The present application belongs to the technical field of pile hole diameter measuring equipment, in particular to a pile hole diameter detection device for road and bridge construction, which comprises an ultrasonic hole diameter measuring probe, a data cable and a hole diameter measuring host, the bottom end of the data cable is fixedly and electrically connected with the top end of the ultrasonic hole diameter measuring probe, and the outer wall of the data cable movably sleeved with a positioning mechanism. The present application has the ability of convenient installation and carrying through split design, and the device does not need staff to additionally set up a support when in use, which saves time and effort, reduces the measurement professional degree requirement of the staff, and the device also has the functions of pile hole perpendicularity measurement and positioning the measurement position of the ultrasonic hole diameter measuring probe, which improves the stability and accuracy of the ultrasonic hole diameter measuring probe in measuring the hole diameter, improves the convenience and efficiency of the pile hole diameter measurement, improves the reliability of the device in use, and reduces the labor intensity of the staff.

Description

Technical Field

[0001] This invention belongs to the technical field of pile hole diameter measurement equipment, and in particular relates to a pile hole diameter detection device for road and bridge construction. Background Technology

[0002] Road and bridge pile holes are columnar holes formed in the foundation through mechanical drilling or manual excavation. They are a key structure in pile foundation engineering, used to pour concrete to form pile foundations to support the superstructure of the bridge. After the pile hole is formed, the hole diameter needs to be tested. This is to verify whether the geometric parameters such as the diameter and verticality of the hole meet the design requirements, to check for defects such as diameter reduction, diameter expansion, and hole collapse, and to ensure the quality of pile foundation construction. For example, patent CN212620628U discloses a pile hole diameter testing device for construction engineering supervision.

[0003] In the field of pile hole diameter measurement for roads and bridges, ultrasonic non-contact measurement technology has been widely used due to its advantages of high efficiency, accuracy, and no wear. This technology obtains hole wall data by emitting ultrasonic pulses and receiving reflected signals from the hole wall. It can quickly build a three-dimensional model and accurately identify defects such as diameter reduction and expansion, greatly improving the efficiency and accuracy of pile hole diameter measurement. However, in practical engineering applications, this technology still faces the following problems:

[0004] Firstly, during the preparation stage of the test, due to the complex construction environment of the pile hole, it is necessary to build a support on the top of the pile hole to stably place the ultrasonic borehole measuring equipment. Moreover, it is also necessary to laboriously adjust the position of the ultrasonic borehole measuring equipment to ensure that the ultrasonic probe is located at the center of the pile hole. This process is not only time-consuming and labor-intensive, but also requires a high level of experience and professionalism from the operators, which affects the convenience and efficiency of the pile hole diameter measurement and increases the labor intensity of the staff.

[0005] Secondly, during the testing process, the lowering speed of the ultrasonic probe must be strictly controlled within the low speed range (0.1-0.2m / s). This is because excessively fast lowering speed can easily cause the ultrasonic probe to oscillate radially and vibrate axially, resulting in distortion of the ultrasonic signal and seriously affecting the accuracy of pile hole diameter measurement.

[0006] Furthermore, in the testing of pile holes containing mud, the ultrasonic probe, which is deeply embedded in the pile hole, is less stable due to the obstruction of the mud. The ultrasonic probe is prone to shaking inside the pile hole and deviating from the center of the pile hole, which adversely affects the accuracy of the pile hole diameter measurement and also affects the reliability of the ultrasonic diameter measurement equipment.

[0007] To address this issue, we propose a device for detecting the diameter of pile holes used in road and bridge construction. Summary of the Invention

[0008] The purpose of this invention is to address the above-mentioned problems by providing a device for detecting the diameter of pile holes used in road and bridge construction.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a pile hole diameter detection device for road and bridge construction, comprising an ultrasonic hole diameter measuring probe, a data cable and a hole diameter measuring host, wherein the bottom end of the data cable is fixedly electrically connected to the top end of the ultrasonic hole diameter measuring probe, a positioning mechanism is movably sleeved on the outer wall of the data cable, and a winding mechanism for winding and unwinding the data cable is fixedly connected to the top end of the positioning mechanism.

[0010] The bottom outer wall of the ultrasonic aperture measuring probe is fixedly fitted with a protective cover, the bottom end of the protective cover is fixedly connected with a fixing ring, the bottom end of the fixing ring is tied with a constraint rope, and the bottom end of the constraint rope is fixedly connected with a probe stabilization mechanism.

[0011] The bottom end of the probe stabilization mechanism is fixedly connected to a base plate, and a measurement position correction mechanism is fixedly embedded in the outer wall of the bottom end of the probe stabilization mechanism.

[0012] In the aforementioned pile hole diameter detection device for road and bridge construction, the positioning mechanism includes an adjustment frame that is movably sleeved with the outer wall of a data cable. The upper and lower surfaces of the adjustment frame are provided with tapered wire holes that mate with the outer wall of the data cable. An L-shaped plate is movably sleeved on the inner wall of the adjustment frame. A rectangular through hole for the data cable to pass through is provided on the upper surface of the L-shaped plate. A threaded hole is provided on the side wall of the adjustment frame, and a positioning bolt is threaded onto the wall of the threaded hole. A first arc-shaped clamping block is fixedly connected to the side wall of the horizontal portion of the L-shaped plate. A second arc-shaped clamping block is movably sleeved on the outer wall of the horizontal portion of the L-shaped plate. An electric push rod is fixedly connected to the outer wall of the second arc-shaped clamping block, and the moving end of the electric push rod is fixedly connected to the outer wall of the vertical portion of the L-shaped plate.

[0013] In the aforementioned pile hole diameter detection device for road and bridge construction, the winding mechanism includes two support rings fixedly connected to the upper surface of an L-shaped plate. A rotating cylinder is fixedly installed on the inner wall of the two support rings through rolling bearings. The data cable is wound around the outer wall of the rotating cylinder. A conductive slip ring is fixedly connected to the side end of the rotating cylinder. The top end of the data cable passes through the inner wall of the rotating cylinder and is electrically connected to the power terminal of the conductive slip ring. The data cable of the hole diameter measuring host is electrically connected to the side of the conductive slip ring away from the data cable. A cable hole is provided on the outer wall of the rotating cylinder for the electrical connection between the data cable and the conductive slip ring.

[0014] In the above-mentioned pile hole diameter detection device for road and bridge construction, an L-shaped handle is fixedly connected to the side of the rotating cylinder away from the conductive slip ring. The outer wall of the vertical part of the L-shaped handle is provided with a screw hole, and the wall of the screw hole is threaded with a limit bolt. The side end of the limit bolt contacts the side wall of the rotating cylinder.

[0015] In the aforementioned pile hole diameter detection device for road and bridge construction, the probe stabilization mechanism includes a rotating rod fixedly connected to the bottom end of a constraint rope. Both ends of the rotating rod are fixedly fitted with connecting bearings. A bottom cover is fixedly fitted onto the outer walls of the outer rings of the two connecting bearings. The bottom end of the bottom cover is fixedly connected to the upper surface of a base plate. A limiting hole for the constraint rope to pass through is provided on the upper surface of the bottom cover. A wear-resistant soft sleeve is movably fitted onto the outer wall of the constraint rope. The outer wall of the wear-resistant soft sleeve is fixedly connected to the inner wall of the limiting hole at the top of the bottom cover. A first partition and a second partition are fixedly connected to the inner wall of the bottom cover. A drive motor is fixedly connected to the lower surface of the first partition. A sealed bearing is fixedly fitted onto the output end of the drive motor. A fixed through hole that mates with the outer wall of the outer ring of the sealed bearing is provided on the upper surface of the first partition. A helical gear is fixedly connected to the output end of the drive motor. A helical gear ring that meshes perpendicularly with the helical gear is fixedly fitted onto the rod wall of the rotating rod. A horizontal sensor is fixedly connected to the lower surface of the first partition.

[0016] In the aforementioned pile hole diameter detection device for road and bridge construction, the measurement position correction mechanism includes two outer cylinders fixedly embedded at the bottom end of the base cover. A movable rod is movably sleeved on the side end of each outer cylinder. A sealing ring is fixedly sleeved on the outer wall of the movable rod located inside the outer cylinder. The outer wall of the sealing ring is slidably connected to the inner wall of the outer cylinder. A stop block is fixedly connected to the outer end of the movable rod. A threaded blind hole is opened on the outer wall of the stop block, and a fixing bolt is threadedly connected to the wall of the threaded blind hole. An arc-shaped push plate is sleeved on the outer wall of the fixing bolt. An elastic rope is fixedly connected to both the movable rod and the surface of the outer cylinder. A miniature one-way piston pump is fixedly connected to the upper surface of the base plate. The miniature one-way piston pump is located inside the bottom end of the base cover. A filter mechanism is fixedly connected to the inlet end of the miniature one-way piston pump. A through hole is opened on the lower surface of the base plate, and a normally closed solenoid valve is fixedly connected to the wall of the through hole.

[0017] In the aforementioned pile hole diameter detection device for road and bridge construction, the filtration mechanism includes a water pipe fixedly connected to the inlet end of a miniature one-way piston pump. The top end of the water pipe passes through the upper surface of a second partition and is fixedly connected to a filter cylinder. The side end of the filter cylinder passes through the side wall of the bottom cover. A sealing installation ring is threadedly connected to the inner wall of the open end of the filter cylinder. A filter screen cylinder is fixedly connected to the outer wall of the filter cylinder inside the sealing installation ring. A composite filter element is installed inside the filter screen cylinder.

[0018] In the above-mentioned pile hole diameter detection device for road and bridge construction, a PLC controller is fixedly connected to the outer wall of the first arc-shaped clamping block, and an alarm is fixedly connected to the top of the PLC controller.

[0019] Compared with existing technologies, the advantages of a pile hole diameter detection device for road and bridge construction are:

[0020] 1. With the inclusion of a constraint rope, a measurement position correction mechanism, and a filtering mechanism, when the borehole diameter of a road and bridge pile needs to be measured after drilling, the constraint rope is first tied to the fixing ring. Simultaneously, the structure consisting of the base plate, probe stabilization mechanism, and measurement position correction mechanism is lowered into the bottom of the pile hole. At this point, the level sensor checks the inclination at the bottom. Then, the level of the base plate is adjusted by pulling the constraint rope to ensure the structure is placed horizontally. Afterwards, the PLC controller controls the measurement position correction mechanism, causing its two moving rods to extend outwards and push the arc-shaped push plate to contact the borehole wall, ensuring the structure on the base plate is positioned at the center of the pile hole. During this process, the filtering mechanism purifies the medium pumped by the miniature one-way piston pump, achieving the purpose of position correction and ensuring that the probe stabilization mechanism can move downwards along the center of the pile hole when pulling down the ultrasonic borehole diameter measuring probe, thus ensuring the stability of the ultrasonic borehole diameter measuring probe measurement. This mechanism enables the road and bridge pile hole diameter detection device to have the function of precise positioning of the ultrasonic borehole diameter measuring probe, improving the accuracy of the borehole diameter measurement results and enhancing the reliability of the device.

[0021] 2. Through the positioning mechanism, winding mechanism, and probe stabilization mechanism, after the base plate is accurately positioned, the staff quickly places the device on the steel casing at the top of the pile hole using the positioning mechanism. Simultaneously, the data cable below is adjusted to the center of the pile hole using the adjustment frame, thus aligning the ultrasonic borehole diameter measuring probe with the center of the pile hole. Next, the probe stabilization mechanism tightens the constraint rope and the data cable below the adjustment frame. After tightening, the probe stabilization mechanism pauses operation for 2 minutes. During these 2 minutes, the staff measures the tilt angle of the data cable below the adjustment frame using a protractor. If the tilt angle error exceeds the specified error range for pile hole verticality, the pile hole verticality is unqualified; otherwise, the verticality meets the design requirements of the pile hole. This mechanism, through its split design, makes the road and bridge pile hole diameter detection device easy to install and carry. It eliminates the need for additional support during use, saving time and effort and reducing the professional measurement requirements for staff. Furthermore, the device also has the function of measuring pile hole verticality, which not only improves the convenience and efficiency of pile hole diameter measurement but also reduces the labor intensity of staff.

[0022] 3. Through the established probe stabilization mechanism, after 2 minutes, the PLC controller continues to control the drive motor. The drive end of the drive motor drives the rotating rod to rewind the constraint rope. Due to the downward pull of the constraint rope, the ultrasonic borehole measuring probe can move quickly during its penetration into the pile hole without being obstructed by the medium inside the pile hole, ensuring that the downward path of the ultrasonic borehole measuring probe always follows the center position of the pile hole. This guarantees the accuracy and reliability of the borehole diameter data measured by the ultrasonic borehole measuring probe. The borehole diameter data measured by the ultrasonic borehole measuring probe is fed back to the screen of the borehole measuring host through the data cable and conductive slip ring. The operator can clearly and intuitively understand the borehole diameter. This mechanism enables the device to locate the ultrasonic borehole measuring probe, improving the stability and efficiency of the ultrasonic borehole measuring probe in measuring borehole diameter, and enhancing the accuracy of pile hole diameter measurement. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a pile hole diameter detection device for road and bridge construction provided by the present invention;

[0024] Figure 2 This is a schematic diagram of the connection structure between the positioning mechanism and the winding mechanism in a pile hole diameter detection device for road and bridge construction provided by the present invention.

[0025] Figure 3 This is a schematic diagram of the connection structure between the probe stabilization mechanism and the measurement position correction mechanism in a pile hole diameter detection device for road and bridge construction provided by the present invention.

[0026] Figure 4 This is a partial top view of the positioning mechanism in a pile hole diameter detection device for road and bridge construction provided by the present invention;

[0027] Figure 5 This is a schematic diagram of the filter mechanism in a pile hole diameter detection device for road and bridge construction provided by the present invention;

[0028] Figure 6 This is a three-dimensional structural diagram of the filter mechanism in a pile hole diameter detection device for road and bridge construction provided by the present invention;

[0029] Figure 7 This is a three-dimensional structural diagram of the arc-shaped push plate part in a pile hole diameter detection device for road and bridge construction provided by the present invention.

[0030] Figure 8 This is a three-dimensional structural diagram of the rotating cylinder part in a pile hole diameter detection device for road and bridge construction provided by the present invention.

[0031] In the diagram: 1. Ultrasonic aperture measuring probe; 2. Data cable; 3. Aperture measuring main unit; 4. Positioning mechanism; 41. Adjusting frame; 42. L-shaped plate; 43. Rectangular through hole; 44. Positioning bolt; 45. First arc-shaped clamp; 46. Second arc-shaped clamp; 47. Electric push rod; 5. Rewinding mechanism; 51. Support ring; 52. Rotating cylinder; 53. Conductive slip ring; 54. Cable hole; 6. Protective cover; 7. Probe stabilizing mechanism; 71. Rotating rod; 72. Connecting bearing; 73. Base cover; 74. Wear-resistant soft sleeve; 75. First partition plate; 76. Second partition plate 77 Drive motor, 78 Sealed bearing, 79 Helical gear, 710 Helical gear ring, 711 Horizontal sensor, 8 Measurement position correction mechanism, 81 Outer cylinder, 82 Moving rod, 83 Sealing ring, 84 Stop block, 85 Fixing bolt, 86 Arc-shaped push plate, 87 Elastic rope, 88 Miniature one-way piston pump, 89 Normally closed solenoid valve, 9 Filtration mechanism, 91 Water pipe, 92 Filter cartridge, 93 Sealing mounting ring, 94 Filter screen cylinder, 95 Composite filter element, 10 Fixing ring, 11 Restraint rope, 12 Base plate, 13 L-shaped handle, 14 Limit bolt, 15 PLC controller, 16 Alarm. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figures 1-8 The device shown is a pile hole diameter detection device for road and bridge construction, comprising an ultrasonic borehole diameter measuring probe 1, a data cable 2, and a borehole diameter measuring host 3. The bottom end of the data cable 2 is fixedly and electrically connected to the top end of the ultrasonic borehole diameter measuring probe 1. A positioning mechanism 4 is movably sleeved on the outer wall of the data cable 2. The positioning mechanism 4 includes an adjusting frame 41 that is movably sleeved on the outer wall of the data cable 2. The upper and lower surfaces of the adjusting frame 41 are provided with tapered wire holes that mate with the outer wall of the data cable 2. An L-shaped plate 42 is movably sleeved on the inner wall of the adjusting frame 41. The upper surface has a rectangular through hole 43 for the data cable 2 to pass through. The side wall of the adjustment frame 41 has a threaded hole, and the hole wall of the threaded hole is threaded with a positioning bolt 44. The side wall of the horizontal part of the L-shaped plate 42 is fixedly connected to a first arc-shaped clamping block 45. The outer wall of the horizontal part of the L-shaped plate 42 is movably fitted with a second arc-shaped clamping block 46. The outer wall of the second arc-shaped clamping block 46 is fixedly connected to an electric push rod 47. The moving end of the electric push rod 47 is fixedly connected to the outer wall of the vertical part of the L-shaped plate 42. This mechanism can improve the convenience and efficiency of the device through convenient installation.

[0034] The top of the positioning mechanism 4 is fixedly connected to a winding mechanism 5 for winding and unwinding the data cable 2. The winding mechanism 5 includes two support rings 51 fixedly connected to the upper surface of the L-shaped plate 42. The inner walls of the two support rings 51 are jointly fixedly mounted with a rotating cylinder 52 via rolling bearings. The data cable 2 is wound around the outer wall of the rotating cylinder 52. A conductive slip ring 53 is fixedly connected to the side end of the rotating cylinder 52. The top end of the data cable 2 passes through the inner wall of the rotating cylinder 52 and is electrically connected to the terminal of the conductive slip ring 53. The data cable of the aperture measuring host 3 is connected to the conductive slip ring 53. Electrically connected to the side away from data cable 2, conductive slip ring 53 adopts a high protection level (such as IP67) design. The outer wall of rotating cylinder 52 is provided with cable hole 54 for electrical connection between data cable 2 and conductive slip ring 53. Since the side end of data cable 2 needs to be electrically connected to the power terminal of conductive slip ring 53 located inside rotating cylinder 52, cable hole 54 needs to be opened in rotating cylinder 52 so that the side end of data cable 2 can pass through cable hole 54 and be stably electrically connected to the power terminal of conductive slip ring 53, and is not affected by the rotation of rotating cylinder 52.

[0035] A protective cover 6 is fixedly sleeved on the bottom outer wall of the ultrasonic aperture measuring probe 1 (the material of the protective cover 6 can be low-density polyethylene, with a thickness controlled between 0.5-1mm. At this thickness, the acoustic impedance of the protective cover 6 is close to that of water, which can reduce the reflection at the water-material interface and also has waterproof and mud corrosion resistance capabilities). A fixing ring 10 is fixedly connected to the bottom of the protective cover 6. A restraint rope 11 is tied to the bottom of the fixing ring 10. A probe stabilization mechanism 7 is fixedly connected to the bottom of the restraint rope 11. The probe stabilization mechanism 7 includes a rotating rod 71 fixedly connected to the bottom of the restraint rope 11. Both ends of the rotating rod 71 are fixedly sleeved with connecting bearings 72. The outer rings of the two connecting bearings 72 are jointly fixedly sleeved with a bottom cover 73. The bottom end of the bottom cover 73 is fixedly connected to the upper surface of the base plate 12. The upper surface of the bottom cover 73 is provided with a space for the restraint rope 11. Through the limiting hole, the outer wall of the constraint rope 11 is movably sleeved with a wear-resistant soft sleeve 74. The outer wall of the wear-resistant soft sleeve 74 is fixedly connected to the inner wall of the limiting hole at the top of the bottom cover 73. The inner wall of the bottom cover 73 is fixedly connected with a first partition 75 and a second partition 76. The lower surface of the first partition 75 is fixedly connected with a drive motor 77. The output end of the drive motor 77 is fixedly sleeved with a sealed bearing 78. The upper surface of the first partition 75 has a fixed through hole that matches the outer wall of the outer ring of the sealed bearing 78. The output end of the drive motor 77 is fixedly connected with a helical gear 79. The rod wall of the rotating rod 71 is fixedly sleeved with a helical gear ring 710 that meshes perpendicularly with the helical gear 79. The lower surface of the first partition 75 is fixedly connected with a horizontal sensor 711. This mechanism can improve the accuracy of the measurement results by improving the stability of the measurement process of the ultrasonic aperture measuring probe 1.

[0036] A base plate 12 is fixedly connected to the bottom end of the probe stabilization mechanism 7. A measurement position correction mechanism 8 is fixedly embedded in the outer wall of the bottom end of the probe stabilization mechanism 7. The measurement position correction mechanism 8 includes two outer cylinders 81 fixedly embedded in the bottom end of the base cover 73. The interior of the outer cylinders 81 is connected to the bottom interior of the base cover 73. A moving rod 82 is movably sleeved on the side end of the outer cylinder 81. A sealing ring 83 is fixedly sleeved on the outer wall of the moving rod 82 located inside the outer cylinder 81. The outer wall of the sealing ring 83 is slidably connected to the inner wall of the outer cylinder 81. A stop block 84 is fixedly connected to the outer end of the moving rod 82. A threaded blind hole is opened on the outer wall of the stop block 84, and a fixing bolt 85 is threadedly connected to the wall of the threaded blind hole. An arc-shaped push plate 86 is sleeved on the outer wall of the fixing bolt 85. An elastic rope 87 is fixedly connected to the surface of the moving rod 82 and the outer cylinder 81. A miniature one-way piston pump 88 is fixedly connected to the upper surface of the base plate 12. Pump 88 is located inside the bottom of the base cover 73. The inlet end of the miniature one-way piston pump 88 is fixedly connected to the filter mechanism 9. A through hole is opened on the lower surface of the base plate 12, and a normally closed solenoid valve 89 is fixedly connected to the wall of the through hole. When the measurement position correction mechanism 8 is working, the moving rod 82 is pushed outward by the medium. At this time, the elastic rope 87 is stretched and deformed, and a rebound force is generated. When the normally closed solenoid valve 89 is opened to discharge the medium at the bottom of the base cover 73, the moving rod 82 and the sealing ring 83 lose the compression of the medium, so that the moving rod 82 can retract under the action of the rebound force of the elastic rope 87. This ensures that when the measurement position correction mechanism 8 is retracted, the arc-shaped push plate 86 on the side of the moving rod 82 is not likely to hit the inner wall of the pile hole. This mechanism enables the road and bridge pile hole diameter detection device to have the function of precise positioning of the ultrasonic diameter measurement probe 1, improves the accuracy of the diameter measurement results, and improves the reliability of the device.

[0037] The filtration mechanism 9 includes a water pipe 91 fixedly connected to the inlet end of the miniature one-way piston pump 88. The top end of the water pipe 91 passes through the upper surface of the second partition 76 and is fixedly connected to a filter cylinder 92. The side end of the filter cylinder 92 passes through the side wall of the bottom cover 73. A sealing ring 93 is threadedly connected to the inner wall of the open end of the filter cylinder 92. A filter screen cylinder 94 is fixedly connected to the outer wall of the filter cylinder 92 inside the sealing ring 93. A composite filter element 95 is installed inside the filter screen cylinder 94. The composite filter element 95 can be a sponge filter element mixed with activated carbon, which has high-efficiency filtration capability and high-efficiency medium passage capability, avoiding clogging during pore size detection. The filtration mechanism 9 can purify the cleanliness of the medium drawn by the miniature one-way piston pump 88 and avoid excessive wear of the internal structure of the measurement position correction mechanism 8 by impurities.

[0038] An L-shaped handle 13 is fixedly connected to the side of the rotating cylinder 52 away from the conductive slip ring 53. A screw hole is opened on the outer wall of the vertical part of the L-shaped handle 13, and a limit bolt 14 is threadedly connected to the wall of the screw hole. The side end of the limit bolt 14 contacts the side wall of the rotating cylinder 52. A PLC controller 15 is fixedly connected to the outer wall of the first arc-shaped clamping block 45. An alarm 16 is fixedly connected to the top of the PLC controller 15. The alarm 16 can help the staff to know in time whether the base plate 12 is placed horizontally.

[0039] The electric push rod 47, drive motor 77, normally closed solenoid valve 89, alarm 16 and miniature one-way piston pump 88 are all electrically connected to the output terminal of PLC controller 15 via wires. The level sensor 711 is electrically connected to the input terminal of PLC controller 15 via wires. The above-mentioned power supply equipment and electrical connections are all existing technologies and will not be described in detail here.

[0040] The operating principle of this invention is described as follows: When the diameter of a road bridge pile hole needs to be measured after the hole is formed, the winding mechanism 5 is first installed through the positioning mechanism 4, and the ultrasonic diameter measuring probe 1 is located at the top of the pile hole. Then, the constraint rope 11 is tied to the fixing ring 10. At the same time, the PLC controller 15 is sealed and electrically connected to the relevant energized components in the probe stabilization mechanism 7 and the measurement position correction mechanism 8 through the wire. Then, the structure consisting of the base plate 12, the probe stabilization mechanism 7, and the measurement position correction mechanism 8 is sunk to the bottom of the pile hole. At this time, the horizontal sensor 711 will check the inclination at the bottom and convert the inclination into an electrical signal and send it to the PLC controller 15. If the angle of inclination exceeds the preset horizontal angle threshold of the PLC controller 15, the PLC controller 15 will... Controller 15 controls alarm 16 to sound an alarm. After receiving the alarm information from alarm 16, the operator slowly pulls the restraint rope 11 a small distance, then releases it, repeating this cycle. This ensures that the structure consisting of base plate 12, probe stabilization mechanism 7, and measurement position correction mechanism 8 is placed horizontally on the sediment layer at the bottom of the pile hole. This is because after the pile hole is drilled, a large number of small particles of impurities in the medium will settle at the bottom of the pile hole. The settling of these small particles will form a dense sediment layer at the bottom of the pile hole, and the relatively flat surface of the sediment layer is a necessary manifestation of the pursuit of the lowest potential energy, uniform settlement, and no disturbance in the gravitational field. This further ensures that base plate 12 can be placed horizontally. Then, level sensor 711 sends an electrical signal indicating that base plate 12 is in a horizontal state. The PLC controller 15, based on the electrical signal, controls the micro one-way piston pump 88 (which can pump both air and liquid) to start, while simultaneously controlling the alarm 16 to remain silent. The micro one-way piston pump 88 draws the medium (air or mud) inside the pile hole through the filter mechanism 9. The medium is purified when it passes through the composite filter element 95 of the filter mechanism 9, filtering out particulate impurities. Then, the medium enters the bottom of the bottom cover 73 and, with the cooperation of the sealing ring 83, pushes out the moving rod 82. The moving rod 82 pushes the arc-shaped push plate 86 close to the hole wall. Before use, the operator selects an arc-shaped push plate 86 with the same curvature as the pile hole to ensure that the arc-shaped push plate 86 can perfectly fit against the hole wall after contact, ensuring that the arc-shaped push plate 86 is squeezed and limited. The effect is that the arc-shaped push plate 86 then contacts the wall of the pile hole. At this time, since the two outer cylinders 81 are connected in the same spatial area (i.e., the bottom area of ​​the bottom cover 73), the two moving rods 82 can extend outwards simultaneously, and the extension amount is also consistent. This ensures that the two arc-shaped push plates 86 can contact the wall of the pile hole at the same time, so that the bottom cover 73 and the bottom plate 12 are positioned at the bottom center of the pile hole, achieving the purpose of position correction. It also ensures that when the probe stabilization mechanism 7 pulls down the ultrasonic aperture measuring probe 1, it can move down along the center of the pile hole, ensuring the stability of the ultrasonic aperture measuring probe 1 measurement and further improving the accuracy of the ultrasonic aperture measuring probe 1 in measuring the diameter of the pile hole. This mechanism enables the road and bridge pile hole diameter detection device to have the function of precise positioning of the ultrasonic aperture measuring probe 1.To improve the accuracy of aperture measurement results and enhance the reliability of the device.

[0041] After the base plate 12 is accurately positioned, the staff will place the first arc-shaped clamping block 45 and the second arc-shaped clamping block 46 on both sides of the steel casing at the top of the pile hole, and control the electric push rod 47 to start through the PLC controller 15 (this operation can be achieved by connecting an external control panel to the input end of the PLC controller 15, which is existing technology and will not be described in detail here). The moving end of the electric push rod 47 extends outward to push the second arc-shaped clamping block 46 to move along the L-shaped plate 42, so that the first arc-shaped clamping block 45 and the second arc-shaped clamping block 46 clamp the steel casing, thereby fixing the L-shaped plate 42. Then, the position of the adjustment frame 41 is moved so that the data cable 2 located in the adjustment frame 41 is at the center of the pile hole. After the adjustment frame 41 is adjusted, the positioning bolt 44 is rotated to achieve the purpose of fixing, ensuring that the ultrasonic aperture measuring probe 1 at the bottom of the data cable 2 is at the center of the pile hole.

[0042] Next, the PLC controller 15 controls the drive motor 77 to start for 10 seconds. The drive motor 77 drives the rotating rod 71 to rotate through the helical gear 79 and the helical gear ring 710. During the rotation of the rotating rod 71, the constraint rope 11 is wound up, making the constraint rope 11 taut. Moreover, the elastic deformation of the wear-resistant soft sleeve 74 during the winding process of the constraint rope 11 can expand the winding range of the constraint rope 11 and enable the automatic rope unwinding effect during winding. In addition, the wear-resistant soft sleeve 74 can also reduce the wear of the constraint rope 11. At the same time, the constraint rope 11 drives the ultrasonic aperture measuring probe 1 and the data cable 2 located below the adjustment frame 41 to be taut through the fixing ring 10 and the protective cover 6. During this process, the constraint of the winding mechanism 5 is released, so that the data cable 2 at the rotating drum 52 can move with the ultrasonic aperture measuring probe. 1. After the movement and release, and 10 seconds later, the PLC controller 15 controls the drive motor 77 to pause for 2 minutes. During these 2 minutes, the staff measures the tilt angle of the data cable 2 below the adjustment frame 41 using a protractor. If the tilt angle error exceeds the error range specified for the verticality of the pile hole, the verticality of the pile hole is unqualified. Otherwise, the verticality meets the design requirements of the pile hole. The split design of this mechanism makes the road and bridge pile hole diameter detection device easy to install and carry. When using the device, the staff does not need to set up an additional support, saving time and effort and reducing the professional measurement requirements of the staff. Moreover, the device also has the function of measuring the verticality of the pile hole, which not only improves the convenience and efficiency of pile hole diameter measurement, but also reduces the labor intensity of the staff.

[0043] After 2 minutes, the PLC controller 15 continues to control the drive motor 77. The drive end of the drive motor 77 drives the rotating rod 71 to wind up the constraint rope 11. Due to the downward pulling force of the constraint rope 11, the ultrasonic borehole measuring probe 1 can move quickly as it penetrates the pile hole, with a moving speed of up to (0.4-0.6 m / s). At the same time, the constraint between the limit bolt 14 and the support ring 51 is released, allowing the rotating cylinder 52 to rotate freely. Furthermore, due to the limit of the tapered wire hole in the adjusting frame 41, the data cable 2 below the adjusting frame 41 will not be released excessively, thus preventing the ultrasonic borehole from being over-exposed. The position of the ultrasonic aperture measuring probe 1 shifts, causing the rotation speed of the rotating cylinder 52 to release the data cable 2 in line with the winding speed of the constraint rope 11. This ensures that the constraint rope 11, the ultrasonic aperture measuring probe 1, and the data cable 2 below the adjusting frame 41 are always taut. Furthermore, the design speed at which the drive motor 77 winds the constraint rope 11 is compatible with the structural strength of the data cable 2, preventing it from being pulled or damaged, and avoiding fluctuations caused by the medium inside the pile hole. This ensures that the downward path of the ultrasonic aperture measuring probe 1 always follows the center of the pile hole, guaranteeing the ultrasonic aperture measurement... The ultrasonic borehole measurement data obtained by probe 1 is accurate and reliable. The working time of drive motor 77 is calculated based on the designed depth of the pile hole to ensure that probe 1 can comprehensively scan and measure the borehole diameter. The borehole diameter data measured by probe 1 is fed back to the screen of the borehole measurement host 3 via data cable 2 and conductive slip ring 53. This allows workers to clearly and intuitively understand the borehole diameter, providing guidance for road and bridge pile foundation construction and ensuring the quality of the construction. After the borehole diameter measurement is completed, the base plate 12 and probe stabilizer are retrieved via winding mechanism 5. When the structure consisting of the positioning mechanism 7 and the measurement position correction mechanism 8 is in place, the PLC controller 15 controls the normally closed solenoid valve 89 to open. The opened normally closed solenoid valve 89 allows the medium stored inside the bottom cover 73 to be discharged. Under the action of the elastic rope 87, the moving rod 82 retracts towards the outer cylinder 81 and drives the arc-shaped push plate 86 away from the hole wall of the pile hole, thereby facilitating the recovery of the structure at the bottom plate 12. This mechanism enables the device to have the function of positioning the ultrasonic aperture measuring probe 1, improving the stability and efficiency of the ultrasonic aperture measuring probe 1 in measuring the aperture, and improving the accuracy of the pile hole aperture measurement.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for detecting the diameter of pile holes used in road and bridge construction, comprising an ultrasonic borehole measuring probe (1), a data cable (2), and a borehole measuring host (3), characterized in that, The bottom end of the data cable (2) is fixedly electrically connected to the top end of the ultrasonic aperture measuring probe (1). The outer wall of the data cable (2) is movably sleeved with a positioning mechanism (4). The top end of the positioning mechanism (4) is fixedly connected with a winding mechanism (5) for winding and unwinding the data cable (2). The bottom outer wall of the ultrasonic aperture measuring probe (1) is fixedly fitted with a protective cover (6), the bottom end of the protective cover (6) is fixedly connected with a fixing ring (10), the bottom end of the fixing ring (10) is tied with a restraint rope (11), and the bottom end of the restraint rope (11) is fixedly connected with a probe stabilizing mechanism (7). The bottom end of the probe stabilization mechanism (7) is fixedly connected to a base plate (12), and the outer wall of the bottom end of the probe stabilization mechanism (7) is fixedly embedded with a measurement position correction mechanism (8). The probe stabilization mechanism (7) includes a rotating rod (71) fixedly connected to the bottom end of the constraint rope (11). Both ends of the rotating rod (71) are fixedly sleeved with connecting bearings (72). The outer rings of the two connecting bearings (72) are jointly fixedly sleeved with a bottom cover (73). The bottom end of the bottom cover (73) is fixedly connected to the upper surface of the base plate (12). The upper surface of the bottom cover (73) is provided with a limiting hole for the constraint rope (11) to pass through. The outer wall of the constraint rope (11) is movably sleeved with a wear-resistant soft sleeve (74). The outer wall of the wear-resistant soft sleeve (74) is fixedly connected to the inner wall of the limiting hole at the top of the bottom cover (73). The inner wall of the first partition (75) is fixedly connected with a first partition (75) and a second partition (76). The lower surface of the first partition (75) is fixedly connected with a drive motor (77). The output end of the drive motor (77) is fixedly sleeved with a sealed bearing (78). The upper surface of the first partition (75) is provided with a fixed through hole that matches the outer wall of the outer ring of the sealed bearing (78). The output end of the drive motor (77) is fixedly connected with a helical gear (79). The rod wall of the rotating rod (71) is fixedly sleeved with a helical gear ring (710) that meshes perpendicularly with the helical gear (79). The lower surface of the first partition (75) is fixedly connected with a horizontal sensor (711). The measurement position correction mechanism (8) includes two outer cylinders (81) fixedly embedded at the bottom end of the base cover (73). A moving rod (82) is movably sleeved on the side end of the outer cylinder (81). A sealing ring (83) is fixedly sleeved on the outer wall of the moving rod (82) on the inner side of the outer cylinder (81). The outer wall of the sealing ring (83) is slidably connected to the inner wall of the outer cylinder (81). A stop block (84) is fixedly connected to the outer end of the moving rod (82). A threaded blind hole is opened on the outer wall of the stop block (84), and a fixing bolt is threadedly connected to the wall of the threaded blind hole. 85), an arc-shaped push plate (86) is sleeved on the outer wall of the fixing bolt (85), an elastic rope (87) is fixedly connected to the surface of the moving rod (82) and the outer cylinder (81), a miniature one-way piston pump (88) is fixedly connected to the upper surface of the bottom plate (12), the miniature one-way piston pump (88) is located inside the bottom end of the bottom cover (73), the liquid inlet end of the miniature one-way piston pump (88) is fixedly connected to the filter mechanism (9), the lower surface of the bottom plate (12) is provided with a through hole, and a normally closed solenoid valve (89) is fixedly connected to the hole wall of the through hole.

2. The pile hole diameter detection device for road and bridge construction according to claim 1, characterized in that, The positioning mechanism (4) includes an adjustment frame (41) that is movably sleeved with the outer wall of the data cable (2). The upper and lower surfaces of the adjustment frame (41) are provided with tapered wire holes that cooperate with the outer wall of the data cable (2). The inner wall of the adjustment frame (41) is movably sleeved with an L-shaped plate (42). The upper surface of the L-shaped plate (42) is provided with a rectangular through hole (43) for the data cable (2) to pass through. The side wall of the adjustment frame (41) is provided with a threaded hole, and the hole wall of the threaded hole is threaded with a positioning bolt (44). The side wall of the horizontal part of the L-shaped plate (42) is fixedly connected with a first arc-shaped clamping block (45). The outer wall of the horizontal part of the L-shaped plate (42) is movably sleeved with a second arc-shaped clamping block (46). The outer wall of the second arc-shaped clamping block (46) is fixedly connected with an electric push rod (47). The moving end of the electric push rod (47) is fixedly connected with the outer wall of the vertical part of the L-shaped plate (42).

3. The pile hole diameter detection device for road and bridge construction according to claim 2, characterized in that, The winding mechanism (5) includes two support rings (51) fixedly connected to the upper surface of the L-shaped plate (42). The inner walls of the two support rings (51) are fixedly mounted with a rotating cylinder (52) through rolling bearings. The data cable (2) is wound around the outer wall of the rotating cylinder (52). A conductive slip ring (53) is fixedly connected to the side end of the rotating cylinder (52). The top end of the data cable (2) passes through the inner wall of the rotating cylinder (52) and is electrically connected to the power terminal of the conductive slip ring (53). The data line of the aperture measuring host (3) is electrically connected to the side of the conductive slip ring (53) away from the data cable (2). The outer wall of the rotating cylinder (52) is provided with a cable hole (54) for the electrical connection between the data cable (2) and the conductive slip ring (53).

4. The pile hole diameter detection device for road and bridge construction according to claim 3, characterized in that, An L-shaped handle (13) is fixedly connected to the side of the rotating cylinder (52) away from the conductive slip ring (53). The vertical part of the L-shaped handle (13) has a screw hole on its outer wall, and a limit bolt (14) is threadedly connected to the wall of the screw hole. The side end of the limit bolt (14) contacts the side wall of the rotating cylinder (52).

5. The pile hole diameter detection device for road and bridge construction according to claim 1, characterized in that, The filtration mechanism (9) includes a water pipe (91) fixedly connected to the inlet end of a micro one-way piston pump (88). The top end of the water pipe (91) passes through the upper surface of the second partition (76) and is fixedly connected to a filter cylinder (92). The side end of the filter cylinder (92) passes through the side wall of the bottom cover (73). A sealing ring (93) is threadedly connected to the inner wall of the open end of the filter cylinder (92). A filter screen cylinder (94) is fixedly connected to the outer wall of the filter cylinder (92) inside the filter cylinder (92). A composite filter element block (95) is installed inside the filter screen cylinder (94).

6. The pile hole diameter detection device for road and bridge construction according to claim 2, characterized in that, A PLC controller (15) is fixedly connected to the outer wall of the first arc-shaped clamp (45), and an alarm (16) is fixedly connected to the top of the PLC controller (15).

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