Detection device applied to screw pile

Abstract

The utility model relates to the technical field of pile foundation detection, and discloses a detection device applied to a screw pile. The telescopic rod is arranged in the vertical direction and penetrates through the supporting frame; the driving assembly is used for driving the telescopic rod to axially move and circumferentially rotate; the first distance measuring piece and the second distance measuring piece are installed at the bottom of the telescopic rod and achieve external distance measuring in the radial direction and the axial direction of the telescopic rod respectively; and the control unit is electrically connected with the first distance measuring part and the second distance measuring part. According to the detection device, the telescopic rod in the vertical direction is arranged, the first distance measuring piece installed at the bottom of the telescopic rod measures the distance in the radial direction of the telescopic rod, the second distance measuring piece measures the distance in the axial direction of the telescopic rod, parameters of the screw pitch and the thread form height of the screw pile can be rapidly measured, and the operability and wide applicability of measurement are improved.

Description

Technical Field

[0001] This utility model relates to the field of pile foundation testing technology, and in particular to a testing device applied to screw piles. Background Technology

[0002] As a new type of foundation pile, screw piles have been increasingly widely used in many fields such as building construction, bridge engineering, and highway engineering. Their unique threaded structure increases the contact area between the pile and the surrounding soil, effectively improving the pile's bearing capacity, shortening the construction cycle, and reducing project costs. Driven by these advantages, the market demand for screw piles continues to rise, and the development prospects are broad. The supporting testing equipment is crucial for ensuring the construction quality and performance of screw piles. Precise testing equipment can monitor various parameters of screw piles in real time during construction, such as pitch and thread height, ensuring that the screw piles are accurately formed according to design requirements, providing reliable assurance for project quality, and playing an irreplaceable role in the healthy development of the screw pile industry.

[0003] In existing technologies, the excavation and exposure method is typically used to measure parameters such as pitch and thread height of bolted piles. Specifically, this involves partial excavation near the pile head to expose part of the bolted pile's thread structure, ensuring at least 2-3 complete thread segments are exposed to guarantee the measurement area is free of soil for clear observation and measurement. The pitch and thread height are then measured manually. Operators usually use a steel tape measure or ruler to measure the pitch and calipers or depth gauges to measure the thread height. However, due to poor human stability, it's difficult to ensure that the pitch measurement is performed along the axial direction of the bolted pile, and similarly, it's difficult to ensure that the thread height measurement is performed along the radial direction. This places extremely high demands on the operator's skills, requiring extensive experience and specialized expertise to accurately perform the excavation and measurement operations; otherwise, errors can easily occur, affecting the accuracy of the test results.

[0004] Given the shortcomings of existing excavation and exposure methods in detecting parameters such as pitch and tooth height of screw piles, it is particularly important and urgent to develop a new detection device that can effectively solve these problems. Utility Model Content

[0005] The present invention aims to provide a testing device for screw piles to overcome the shortcomings mentioned above.

[0006] To achieve the above objectives, the technical solution of this utility model is: a testing device applied to screw piles, comprising:

[0007] Support frame;

[0008] A telescopic rod that is vertically oriented and extends through the support frame;

[0009] A drive assembly for driving the telescopic rod to move axially and rotate circumferentially;

[0010] A first and a second distance measuring element are installed at the bottom of the telescopic pole, wherein the first and second distance measuring elements respectively measure distances outward along the radial and axial directions of the telescopic pole; and

[0011] A control unit electrically connected to the first and second rangefinders.

[0012] Furthermore, the telescopic rod includes:

[0013] A middle sleeve rotatably connected to the support frame, the axial direction of the middle sleeve being vertical, and the driving assembly for driving the axial movement and circumferential rotation of the middle sleeve; and

[0014] A sliding rod is fixedly and slidably connected to the middle sleeve in a vertical direction. The first and second distance measuring components are installed at the bottom of the sliding rod, and the first and second distance measuring components respectively measure the distance outward in the radial and axial directions of the sliding rod.

[0015] Furthermore, the support frame includes:

[0016] First gearbox, and

[0017] The outer sleeve is rotatably connected to the first gearbox, and the outer sleeve is slidably sleeved on the periphery of the middle sleeve, and the two are slidably connected in the vertical direction.

[0018] The driving component includes:

[0019] The first worm gear, located inside the first gearbox and fixedly connected to the outer wall of the outer sleeve, and

[0020] The first worm gear, which is rotatably connected to the first gearbox, meshes with the first worm wheel for transmission.

[0021] Furthermore, the support frame also includes a second gearbox, the upper end of the outer sleeve passes through the first gearbox and is fixedly connected to the second gearbox, and a rack is installed inwardly on the outer side wall of the middle sleeve;

[0022] The drive assembly further includes a gear rotatably connected in the second gearbox, the gear meshing with a rack for transmission.

[0023] Furthermore, the driving component also includes:

[0024] A second worm gear fixedly connected coaxially to the gear; and

[0025] The second worm gear, which is rotatably connected inside the second gearbox, meshes with the second worm wheel for transmission.

[0026] Furthermore, the inner wall of the outer sleeve is provided with a protrusion; the outer wall of the middle sleeve is provided with a sliding groove arranged in the vertical direction, and the protrusion is slidably connected to the sliding groove.

[0027] Furthermore, the first worm's shaft passes through the first gearbox and is fixedly connected to a knob, and the second worm's shaft passes through the second gearbox and is fixedly connected to a handwheel.

[0028] Furthermore, the middle sleeve is provided with a plurality of first through holes, and the sliding rod is provided with a plurality of second through holes, wherein at least one of the first through holes and at least one of the second through holes are connected to a fastener.

[0029] Furthermore, a first limiting ring is fixedly connected to the upper end of the side wall of the middle sleeve through the second gearbox, and the first limiting ring selectively stops the second gearbox; a second limiting ring is fixedly connected to the lower end of the side wall of the middle sleeve through the first gearbox, and the second limiting ring selectively stops the first gearbox.

[0030] Furthermore, the support frame also includes:

[0031] Several telescopic support legs mounted on the first gearbox; and

[0032] A horizontal bubble meter is installed on the upper surface of the first gearbox.

[0033] Compared with the prior art, this utility model has at least the following advantages:

[0034] The detection device of this utility model uses a telescopic rod along the vertical direction. A first distance measuring device installed at the bottom of the rod measures distance radially along the telescopic rod, and a second distance measuring device measures distance axially along the telescopic rod. The telescopic rod is placed around the screw pile and rotated. The value of the first distance measuring device is read. When the first distance measuring device is at its minimum, its extension line is perpendicular to the axis of the screw pile. At this time, by driving the first and second distance measuring devices to rise and fall synchronously, and combining the readings of the first and second distance measuring devices, the parameters of the screw pile's pitch and thread height can be determined. Even ordinary operators can accurately complete the measurement work, improving the operability and wide applicability of the measurement. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Fig. 1 This is a schematic diagram of the overall structure of the detection device of this utility model applied to screw piles;

[0037] Fig. 2 This is a cross-sectional view of the detection device of this utility model applied to screw piles;

[0038] Fig. 3 This is an assembly diagram of the telescopic rod and drive assembly of this utility model.

[0039] Reference numerals in the attached drawings: 1. First measuring element; 2. Second measuring element; 3. Middle sleeve; 4. Sliding rod; 5. First gearbox; 6. Outer sleeve; 7. First worm gear; 8. First worm; 9. Second gearbox; 10. Rack; 11. Gear; 12. Second worm; 13. Second worm gear; 14. Protrusion; 15. Sliding groove; 16. Knob; 17. Handwheel; 18. Second through hole; 19. Fastener; 20. First limiting ring; 21. Second limiting ring; 22. Telescopic support leg; 23. Horizontal bubble meter; 24. Bearing; 25. Support base. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Reference Figs. 1-3 This utility model provides a testing device for threaded piles, which is suitable for testing the parameters of threaded piles in the excavation and exposure method.

[0043] The specific structure includes a support frame, a telescopic rod, a drive assembly, a ranging element, and a control unit. The support frame is the supporting unit of this invention, used to support the object on the ground. The telescopic rod passes through the support frame and is arranged vertically. The drive assembly is used to drive the telescopic rod to move axially and rotate circumferentially. A first ranging element 1 and a second ranging element 2 are installed at the bottom of the telescopic rod. The first ranging element 1 is used to measure distances radially along the telescopic rod, and the second ranging element 2 is used to measure distances axially along the telescopic rod. Preferably, the first ranging element 1 and the second ranging element 2 are laser ranging sensors or infrared ranging sensors capable of measuring distances. The first ranging element 1 and the second ranging element 2 are electrically connected to the control unit, used to receive data transmitted from the first ranging element 1 and the second ranging element 2, and thereby calculate information such as pitch and thread height.

[0044] Preferably, the telescopic rod includes a middle sleeve 3 and a sliding rod 4. The middle sleeve 3 is rotatably connected to the support frame and is axially arranged in the vertical direction; the sliding rod 4 is fixedly and slidably connected to the middle sleeve 3 in the vertical direction, and a first distance measuring element 1 and a second distance measuring element 2 are installed at its bottom, which respectively realize outward distance measurement in the radial direction and axial direction of the sliding rod 4.

[0045] The middle sleeve 3 is provided with multiple first through holes, and the sliding rod 4 is provided with multiple second through holes 18. At least one first through hole and one second through hole 18 are connected by a fastener 19. The fastener 19 is preferably a bolt and nut structure. By connecting the first through holes and second through holes 18 at different positions, the length of the lower end of the sliding rod 4 extending out of the middle sleeve 3 can be adjusted.

[0046] Specifically, preferably, the support frame includes a first gearbox 5 and an outer sleeve 6. The outer wall of the outer sleeve 6 is fixedly connected to the inner ring of a bearing 24, and the first gearbox 5 is fixedly connected to the outer ring of a bearing 24. The outer sleeve 6 is rotatably connected to the first gearbox 5 via the bearing 24. The outer sleeve 6 is slidably sleeved around the inner sleeve 3, and the two are slidably connected in the vertical direction. The drive assembly includes a first worm gear 7 and a first worm 8. The first worm gear 7 is fixedly connected to the outer wall of the outer sleeve 6. A support seat 25 is provided inside the first gearbox 5. The first worm gear 7 is rotatably connected to the support seat 25. The first worm gear 7 and the first worm 8 are connected in a transmission connection. One end of the shaft of the first worm 8 passes through the first gearbox 5 and is fixedly connected to a knob 16. By rotating the knob 16, the first worm 8 is driven to rotate, which in turn drives the first worm gear 7 to rotate. This achieves the effect of circumferential rotation of the outer sleeve 6, the inner sleeve 3, and the sliding rod 4.

[0047] In addition, the support frame also includes a second gearbox 9. The upper end of the outer sleeve 6 passes through the first gearbox 5 and is fixed to the second gearbox 9. The second gearbox 9 and the outer sleeve 6 can rotate synchronously. A rack 10 is recessed in the outer wall of the middle sleeve 3. A gear 11 that meshes with the rack 10 is rotatably connected inside the second gearbox 9. The gear 11 is coaxially fixedly connected to a second worm gear 13. The second worm gear 13 and the gear 11 can rotate synchronously. The second worm gear 13 is meshed with a second worm 12. The rotation shaft of the second worm 12 and the rotation shaft of the second worm gear 13 are both rotatably connected inside the second gearbox 9 through bearings 24. The rotation shafts of the second worm 12 and the second worm gear 13 are fixedly connected to the inner ring of the bearings 24. The second gearbox 9 is fixedly connected to the outer ring of the bearings 24, thereby achieving the effect of rotational connection. One end of the rotation shaft of the second worm 12 passes through the second gearbox 9 and is fixedly connected to a handwheel 17. By rotating the handwheel 17, the second worm gear 12 is driven to rotate, which in turn drives the second worm wheel 13 to rotate, which in turn drives the gear 11 to rotate. The gear 11 meshes with the rack 10, which drives the middle sleeve 3 to slide up and down in the vertical direction. This achieves the effect of moving the middle sleeve 3 and the sliding rod 4 along their axial direction. At the same time, the inner wall of the outer sleeve 6 has a protrusion 14, and the outer wall of the middle sleeve 3 has a sliding groove 15 in the vertical direction. The protrusion 14 and the sliding groove 15 are slidably connected, thereby ensuring that the middle sleeve 3 and the outer sleeve 6 can rotate synchronously and achieve the effect of axial movement.

[0048] Optionally, the upper end of the side wall of the middle sleeve 3 is fixedly connected to the second gearbox 9 through the second gearbox 9, and can be stopped by the second gearbox 9; the lower end of the side wall is fixedly connected to the first gearbox 5 through the first gearbox 5, and can be stopped by the first gearbox 5.

[0049] Furthermore, the support frame of this utility model also includes three telescopic support legs 22 installed on the upper and lower surfaces of the first gearbox 5 and a horizontal bubble meter 23 set on the first gearbox 5. The telescopic support legs 22 adopt existing technology and can keep the surface of the first gearbox 5 horizontal with the assistance of the horizontal bubble meter 23. The outer sleeve 6, the middle sleeve 3, and the sliding rod 4 of this utility model are all perpendicular to the surface of the first gearbox 5. When the surface of the first gearbox 5 is horizontal, the outer sleeve 6, the middle sleeve 3, and the sliding rod 4 are all vertical.

[0050] The working principle of this utility model:

[0051] The first step is to excavate around the completed screw pile to expose the screw pile's threaded structure, ensuring that at least 2-3 complete threaded segments are exposed and that the measurement area is free of soil so that it can be clearly observed and measured.

[0052] The second step is to adjust the position of the sliding rod 4 on the middle sleeve 3 so that when the sliding rod 4 is inserted into the excavation area, the first measuring element 1 and the second measuring element 2 are respectively opposite to the threaded section.

[0053] The third step is to place the support frame of the entire detection device stably in a suitable position near the screw pile, ensuring that the first measuring element 1 is facing the screw pile. The device is kept stable by adjusting the telescopic support leg 22, and the level bubble meter 23 is used to assist in the adjustment to ensure that the first gearbox 5 is in a horizontal state, laying the foundation for subsequent accurate measurement.

[0054] The fourth step is to manually rotate the first worm 8 in both directions. Since the first worm 8 meshes with the first worm wheel 7 and the first worm wheel 7 is fixedly connected to the outer wall of the outer sleeve 6, it can drive the outer sleeve 6, the middle sleeve 3 and the sliding rod 4 to rotate circumferentially. The value measured by the first distance measuring element 1 will change. When the value of the first distance measuring element 1 is the smallest, the extension line of the first distance measuring element 1 intersects the axis of the screw pile.

[0055] Fifth step, manually rotate the second worm 12. Since the second worm wheel 13 meshes with the second worm 12, and the second worm wheel 13 is coaxially fixedly connected with the gear 11, the gear 11 meshes with the rack 10 on the middle sleeve 3, thereby driving the middle sleeve 3 and the sliding rod 4 to move axially, which in turn drives the second distance measuring element 2 to move vertically synchronously. During the movement, parameters such as the pitch and tooth height of the screw pile can be measured.

[0056] Taking the measurement process of screw post tooth profile height as an example, when the laser or infrared light emitted by the first distance measuring device 1 is aligned with the tip of the screw post tooth, the first value of the first distance measuring device 1 is recorded. Then, the second worm gear 12 is rotated again. When the laser or infrared light emitted by the first distance measuring device is aligned with the bottom of the screw post tooth, the value of the first distance measuring device 1 is recorded. The second value of the first distance measuring device 1 is recorded. The difference between the second value and the first value is the screw post tooth profile height. Similarly, by repeating the measurement multiple times and taking the average value, the measured value of the screw post tooth profile height can be accurately obtained.

[0057] Furthermore, when measuring the pitch of the screw pile, when the laser or infrared light emitted by the first measuring element 1 initially aligns with the tooth crest of the screw pile, the third value of the second measuring element 2 is recorded at this time; when the second worm gear 12 is rotated again, when the laser or infrared light emitted by the first measuring element initially aligns with the tooth crest of the next section of the screw pile, the fourth value of the second measuring element 2 is recorded at this time; the absolute value of the difference between the fourth value and the third value is the pitch of the screw pile at this time; similarly, by repeating the measurement multiple times and taking the average value, the measured value of the screw pile pitch can be accurately obtained.

[0058] The sixth step is to remove the entire testing device from the vicinity of the screw pile after the measurement is completed, store the device properly, and prepare for the testing of the next screw pile or other related work.

[0059] The beneficial effects of this utility model are as follows:

[0060] a. In existing technologies, manual measurement of parameters such as pitch and thread height of screw piles suffers from poor stability, making it difficult to guarantee the accuracy of the measurement direction. This invention, through the design of a support frame, telescopic rod, and drive assembly, provides stable support and adjustment for the detection device. The telescopic rod's structural design includes a middle sleeve 3 and a sliding rod 4. The connection between the middle sleeve 3 and the outer sleeve 6, as well as the rotational connection between the outer sleeve 6 and the support frame, allows the drive assembly to precisely move the telescopic rod axially and rotate circumferentially. This ensures that the first measuring element 1 and the second measuring element 2 can accurately measure the radial and axial directions of the screw pile, avoiding the inaccurate measurement direction caused by poor manual stability.

[0061] b. The detection device of this utility model receives data from the first measuring element 1 and the second measuring element 2 through the control unit, and calculates information such as pitch and thread height, thereby reducing the technical requirements for operators. Operators only need to adjust the detection device according to the operating steps and perform simple operations such as turning the knob 16 and handwheel 17 to accurately measure the parameters of the screw pile, reducing errors caused by human factors and improving the accuracy of the detection results.

[0062] c. This utility model uses a first ranging component 1 and a second ranging component 2, which can automatically realize external distance measurement. The operation is relatively simple, the measurement process is more convenient and efficient, the use of measuring tools is reduced, and the measurement efficiency is improved.

[0063] d. The support frame of this utility model is equipped with three telescopic support legs 22 and a horizontal bubble meter 23. With the assistance of the horizontal bubble meter 23, the surface of the first gearbox 5 can be kept horizontal, thereby ensuring that the outer sleeve 6, the middle sleeve 3 and the sliding rod 4 are all vertical, improving the stability of the entire detection device and providing a reliable basis for accurate measurement.

[0064] e. In measuring the height of the screw thread profile and the pitch, this utility model adopts the method of taking the average value of multiple measurements, which can further improve the accuracy of the measurement results, reduce measurement errors, and ensure the reliability of the measurement results.

[0065] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0066] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A testing device for screw piles, characterized in that, include: Support frame; A telescopic rod that is vertically oriented and extends through the support frame; A drive assembly for driving the telescopic rod to move axially and rotate circumferentially; A first distance measuring element (1) and a second distance measuring element (2) are installed at the bottom of the telescopic pole. The first distance measuring element (1) and the second distance measuring element (2) respectively measure the distance outward along the radial direction and the axial direction of the telescopic pole; and A control unit electrically connected to the first rangefinder (1) and the second rangefinder (2).

2. The detection device for screw piles according to claim 1, characterized in that, The telescopic rod includes: A middle sleeve (3) rotatably connected to the support frame, the axial direction of the middle sleeve (3) being arranged vertically, and the driving assembly being used to drive the middle sleeve (3) to move axially and rotate circumferentially; and A sliding rod (4) is fixedly and slidably connected to the middle sleeve (3) in the vertical direction. The first measuring element (1) and the second measuring element (2) are installed at the bottom of the sliding rod (4), and the first measuring element (1) and the second measuring element (2) respectively measure the distance outward in the radial direction and the axial direction of the sliding rod (4).

3. The detection device for screw piles according to claim 2, characterized in that, The support frame includes: First gearbox (5), and The outer sleeve (6) is rotatably connected to the first gearbox (5), and the outer sleeve (6) is slidably sleeved on the periphery of the middle sleeve (3), and the two are slidably connected in the vertical direction; The driving component includes: The first worm gear (7) is located inside the first gearbox (5) and is fixedly connected to the outer wall of the outer sleeve (6), and The first worm (8) is rotatably connected to the first gearbox (5), and the first worm (8) meshes with the first worm wheel (7) for transmission.

4. The detection device for screw piles according to claim 3, characterized in that, The support frame also includes a second gearbox (9), the upper end of the outer sleeve (6) passes through the first gearbox (5) and is fixedly connected to the second gearbox (9), and a rack (10) is installed inwardly on the outer side wall of the middle sleeve (3); The drive assembly further includes a gear (11) rotatably connected in the second gearbox (9), the gear (11) meshing with a rack (10) for transmission.

5. The testing device for screw piles according to claim 4, characterized in that, The driving component also includes: The second worm gear (13) is fixedly connected coaxially to the gear (11); and The second worm (12) is rotatably connected in the second gearbox (9), and the second worm (12) meshes with the second worm wheel (13) for transmission.

6. The testing device for screw piles according to claim 5, characterized in that, The inner wall of the outer sleeve (6) is provided with a protrusion (14); the outer wall of the middle sleeve (3) is provided with a sliding groove (15) arranged in the vertical direction, and the protrusion (14) and the sliding groove (15) are slidably connected.

7. The detection device for screw piles according to claim 5, characterized in that, The first worm (8) has a rotating shaft that passes through the first gearbox (5) and is fixedly connected to a knob (16). The second worm (12) has a rotating shaft that passes through the second gearbox (9) and is fixedly connected to a handwheel (17).

8. The detection device for screw piles according to claim 5, characterized in that, The middle sleeve (3) is provided with a plurality of first through holes, and the sliding rod (4) is provided with a plurality of second through holes (18), wherein at least one of the first through holes and at least one of the second through holes (18) are connected by a fastener (19).

9. The testing device for screw piles according to claim 5, characterized in that, The upper end of the side wall of the middle sleeve (3) is fixedly connected to the second gearbox (9) through the second gearbox (9), and the first limiting ring (20) selectively blocks the second gearbox (9); the lower end of the side wall of the middle sleeve (3) is fixedly connected to the first gearbox (5), and the second limiting ring (21) selectively blocks the first gearbox (5).

10. The detection device for screw piles according to claim 5, characterized in that, The support frame also includes: Several telescopic support legs (22) mounted on the first gearbox (5); and A horizontal bubble meter (23) is installed on the upper surface of the first gearbox (5).

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