A device for detecting voids at the bottom of concrete

Abstract

The present invention belongs to the technical field of concrete cavity detection, and specifically refers to a detection device for the cavities at the bottom of concrete, including an intermittent lateral movement drive mechanism, a probe adaptive lifting mechanism, an anti-torsion single-drive longitudinal movement mechanism, and a fixed frame mechanism. The present invention can realize the intermittent lateral movement of the sensing probe through a continuously powered driving motor without any software control module, and can longitudinally move one unit and turn back when the lateral movement reaches the end position; not only that, the present application also automatically controls the rising avoidance of the sensing probe when the frame slide moves through the relatively arranged fan-shaped teeth and the annular top platform, and automatically resets the frame slide when it is stationary, thereby overcoming the technical contradiction that the height position of the sensing probe cannot be too high or too low.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete cavity detection, and specifically refers to a detection device for the cavity at the bottom of concrete. Background Art

[0002] The voids inside concrete are mainly caused by insufficient vibration, leakage of slurry, and overhead stones. Some of them are also caused by the loss of soil under the concrete layer, which leads to the loss of support under the concrete layer and the formation of voids. These will seriously affect the strength and bearing capacity of this part.

[0003] Internal non-destructive testing of concrete is mostly carried out using ultrasound or light waves, such as ultrasonic flaw detectors. The general detection method is to first draw grid lines on the ground, and then perform multi-point detection in the area near the target in turn based on the intersection positions on the grid lines. Only when there are no voids within a certain range near the support point can the position be used for pile leg support of heavy machinery.

[0004] The current operation procedure requires drawing lines on the ground and manually holding the probe for positioning operations. When the number of detection points is large, not only is the workload large, but the accuracy of manual operation is low, which will cause large errors in data fitting; and after the measurement is completed, the lines drawn on the ground must be cleaned up in time. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention proposes a detection device for the hollowness at the bottom of concrete, which automatically measures the hollowness of each intersection position on the grid in sequence. In order to simplify the physical structure and control logic and improve the applicability and reliability under complex working conditions, the present invention selects ordinary,

[0006] The motor can only control the direction of rotation, and is combined with an ingenious and reliable mechanical structure. Without any software control module, the intermittent lateral movement of the sensing probe can be achieved through a continuously powered driving motor, and it can move longitudinally one unit and turn back when it moves horizontally to the end position; not only that, the present application also automatically controls the rising and avoiding position of the sensing probe when the frame-type slide moves, and automatically resets it when the frame-type slide is stationary through the relatively arranged fan-shaped teeth and the annular top platform, thereby overcoming the technical contradiction that the height position of the sensing probe cannot be too high (affecting the wave propagation and the accuracy of the test) and cannot be too low (prone to collision and wear with the ground when moving).

[0007] The technical solution adopted by the present invention is as follows: The present invention proposes a detection device for voids at the bottom of concrete, comprising an intermittent transverse driving mechanism, a probe adaptive lifting mechanism, an anti-torsion single-drive longitudinal mechanism and a fixed frame mechanism, wherein the intermittent transverse driving mechanism is arranged on the anti-torsion single-drive longitudinal mechanism, the anti-torsion single-drive longitudinal mechanism is arranged on the fixed frame mechanism, and the probe adaptive lifting mechanism is arranged on the intermittent transverse driving mechanism.

[0008] Furthermore, the intermittent transverse driving mechanism includes a transverse guiding assembly, a rotating wheel assembly, a rotating wheel driving assembly and a transverse anti-displacement assembly, wherein the transverse guiding assembly is arranged on the anti-torsion single-drive longitudinal moving mechanism, the rotating wheel assembly is arranged on the transverse guiding assembly, the rotating wheel driving assembly is arranged on the transverse guiding assembly, and the transverse anti-displacement assembly is arranged below the transverse guiding assembly.

[0009] The lateral movement of the intermittent lateral movement drive mechanism can move the probe adaptive lifting mechanism laterally. Moreover, the intermittent lateral movement drive mechanism can automatically move the anti-torsion single-drive longitudinal movement mechanism longitudinally by one unit when it moves to the end and switch the rotation direction of the drive motor by means of a mechanical switch. The non-software-controlled reversing switch not only means lower requirements for lower motors and lower costs, but also a lower failure rate and higher stability for construction sites with relatively harsh conditions.

[0010] Preferably, the transverse guide assembly includes a frame-type slide, a transverse slider and a transverse slide rail, the transverse slide rail is arranged on an anti-torsion single-drive longitudinal movement mechanism, the transverse slider is snap-fitted and slidably arranged on the transverse slide rail, the frame-type slide is arranged on the transverse slider, and a motor mounting plate is provided on the frame-type slide.

[0011] As a further preferred embodiment of the present invention, the wheel assembly includes a bridge-type crossbeam, an intermittent wheel and a transverse driven rack, the bridge-type crossbeam is fixedly connected to the frame-type skateboard, a cylindrical portion is provided below the bridge-type crossbeam, a through square inner hole is provided at the center of the cylindrical portion, the intermittent wheel is rotatably arranged on the cylindrical portion, a fan-shaped tooth portion is provided on the intermittent wheel, an annular top platform is provided on the intermittent wheel at a position opposite to the fan-shaped tooth portion, a driven gear ring portion is also provided on the intermittent wheel, and the transverse driven rack is arranged on an anti-torsion single-drive longitudinal movement mechanism.

[0012] Through the intermittent cooperation of the sector teeth and the transverse driven rack, the driving motor can push the frame slide to slide intermittently during continuous rotation, so that the probe adaptive lifting mechanism can perform cavity detection at this position during the period when the frame slide is stationary.

[0013] Preferably, the rotary wheel drive assembly comprises a drive motor, a driving gear and a reversing switch, the drive motor is arranged on a motor mounting plate, the driving gear is fixedly connected to an output shaft of the drive motor, the reversing switch is arranged on the drive motor, the driving gear and the driven gear ring are meshed for transmission, and the reversing switch can control the rotation direction of the drive motor.

[0014] As a further preferred embodiment of the present invention, the transverse anti-displacement component includes a transverse elastic plate, a transverse ball seat and a transverse ball body, the transverse elastic plate is arranged below the frame-type slide plate, the transverse ball seat is fixed to the end of the transverse elastic plate, and the transverse ball body is rotatably arranged in the transverse ball seat.

[0015] Through the cooperation of the lateral anti-displacement component and the arc-shaped groove of the crossbeam, on the one hand, the resistance of the lateral anti-displacement component when moving along the side of the frame-type crossbeam can be actively controlled; on the other hand, the lateral anti-displacement component can be limited by the arc-shaped groove of the crossbeam, thereby preventing the frame-type slide from deviating due to the vibration of the device itself during the non-displacement stage.

[0016] Furthermore, the probe adaptive lifting mechanism includes a spring support, a settlement spring, a probe support and a sensing probe, the spring support is fixedly connected to the bridge beam, the probe support is slidably arranged in the square inner hole, the settlement spring is arranged between the probe support and the spring support, and an L-shaped plate and a cantilevered sensing top rod are also provided on one side of the probe support, the cantilevered sensing top rod is in sliding contact with the annular top platform, and the sensing probe is detachably arranged at the bottom of the probe support.

[0017] The probe support that moves up and down and slides under the push of the cantilever induction top rod can move up and down with the induction probe, thereby achieving the technical purpose of automatically lifting before the frame slide moves horizontally and automatically descending after the frame slide moves horizontally.

[0018] Since the longitudinal movement of the frame beam is driven by the lateral movement of the frame slide, the longitudinal movement of the frame beam must occur during the lateral movement of the frame slide. Therefore, the sensing probe is also lifted when the frame beam moves longitudinally, which greatly reduces the chance of the sensing probe being hit and worn.

[0019] Furthermore, the anti-torsion single-drive longitudinal movement mechanism includes a crossbeam assembly, a longitudinal movement transmission assembly and a longitudinal movement drive assembly. The crossbeam assembly is arranged on a fixed frame mechanism, the longitudinal movement transmission assembly is arranged at both ends of the crossbeam assembly, and the longitudinal movement drive assembly is arranged on the longitudinal movement transmission assembly.

[0020] Through the linkage of the anti-torsion single-drive longitudinal movement mechanism, on the one hand, when the intermittent transverse movement drive mechanism slides laterally to the end, the longitudinal sliding of the anti-torsion single-drive longitudinal movement mechanism and the rotation direction switching of the drive motor can be automatically controlled; on the other hand, the longitudinal movement of the frame-type crossbeam can be controlled through gear rack transmission, thereby achieving the technical effect of automatic longitudinal advancement and return after reaching the end.

[0021] Preferably, the beam assembly includes a frame beam, a rotating shaft bracket and a self-rotating rotating shaft, the frame beam is arranged on a fixed frame mechanism, the transverse slide rail and the transverse driven rack are arranged on the frame beam, an array of arc-shaped grooves of the beam are arranged on the frame beam, the transverse ball body is rollingly arranged on the side of the frame beam, the transverse ball body and the arc-shaped groove of the beam are in rolling contact, the rotating shaft bracket is fixedly connected to the two ends of the frame beam, and the self-rotating rotating shaft is rotatably arranged on the rotating shaft bracket.

[0022] As a further preferred embodiment of the present invention, the longitudinal movement transmission assembly includes a longitudinal moving gear, a longitudinal driven rack, a winding drum and a linkage rope, the longitudinal moving gear is fixedly connected to the self-rotating shaft, the longitudinal driven rack is arranged on the fixed frame mechanism, the longitudinal moving gear and the longitudinal driven rack are meshed for transmission, the winding drum is fixedly connected to the self-rotating shaft, the two ends of the linkage rope are respectively wound around different winding drums, and through the cross-linkage of the linkage rope, the two winding drums will rotate simultaneously in different directions.

[0023] The winding drum rotates in opposite directions with its two rotating shafts, and can move both ends of the frame beam in the same direction at the same time through symmetrically arranged and meshing longitudinal moving gears and longitudinal driven racks, avoiding the problem of the frame beam being easily deflected and stuck when driven on one side.

[0024] Preferably, the longitudinal shift drive assembly comprises a longitudinal shift dial wheel and a driving striker, the longitudinal shift dial wheel is fixedly connected to the self-rotating shaft, the longitudinal shift dial wheel is provided with shift rod portions evenly distributed in a ring shape, and the driving striker is symmetrically arranged on the frame-type slide plate.

[0025] The impact of the driving pin on the lever part can cause the longitudinal shift dial wheel to rotate, and at the same time, the rotating shaft and the longitudinal moving gear can rotate as a whole. On the one hand, the longitudinal displacement of the frame beam can be driven by the engagement of the longitudinal moving gear and the longitudinal driven rack. On the other hand, the reversing switch can be pushed and pressed by the rotating lever part, thereby switching the rotation direction of the driving motor.

[0026] Further, the fixed frame mechanism includes a frame assembly and a longitudinal anti-displacement assembly, the frame assembly includes a main frame, a foot cup, a longitudinal guide rail and a longitudinal slider, the foot cup is arranged below the main frame, the longitudinal driven rack is arranged on the main frame, the main frame is provided with an array of frame arc grooves, the longitudinal guide rail is arranged on the main frame, the longitudinal slider is engaged and slidably arranged on the longitudinal guide rail, the frame-type crossbeam is arranged on the longitudinal slider, and the longitudinal anti-displacement assembly is arranged on the frame-type crossbeam.

[0027] Preferably, the longitudinal anti-displacement component includes a longitudinal elastic plate, a longitudinal ball seat and a longitudinal ball body, the longitudinal elastic plate is arranged on the frame-type crossbeam, the longitudinal ball seat is arranged at the end of the longitudinal elastic plate, the longitudinal ball body is rollingly arranged in the longitudinal ball seat, the longitudinal ball body is rollingly arranged on the side of the main frame, and the longitudinal ball body is in rolling contact with the arc-shaped groove of the frame.

[0028] Through the cooperation between the longitudinal movement ball body and the arc-shaped groove of the frame, on the one hand, the resistance of the longitudinal movement ball body when it moves along the side of the main frame can be actively controlled; on the other hand, the longitudinal anti-displacement component can be limited by the arc-shaped groove of the frame, so as to avoid the frame beam from deviating due to the vibration of the device itself during the non-displacement stage.

[0029] The beneficial effects achieved by the present invention using the above structure are as follows:

[0030] (1) The lateral movement of the intermittent lateral movement drive mechanism can move the probe adaptive lifting mechanism horizontally. In addition, the intermittent lateral movement drive mechanism can automatically move the anti-torsion single-drive longitudinal movement mechanism longitudinally by one unit when it moves to the end and switch the rotation direction of the drive motor by means of a mechanical switch. The non-software controlled reversing switch not only means lower requirements for lower motors and lower costs, but also a lower failure rate and higher stability for construction sites with relatively harsh conditions.

[0031] (2) Through the intermittent cooperation between the sector teeth and the lateral driven rack, the driving motor can push the frame slide to slide intermittently during continuous rotation, so that the probe adaptive lifting mechanism can perform cavity detection at that position during the period when the frame slide is stationary.

[0032] (3) Through the cooperation between the lateral anti-displacement component and the arc-shaped groove of the cross beam, on the one hand, the resistance of the lateral anti-displacement component when moving along the side of the frame-type cross beam can be actively controlled; on the other hand, the lateral anti-displacement component can be limited by the arc-shaped groove of the cross beam, so as to avoid the frame slide plate from deviating due to the vibration of the device itself during the non-displacement stage.

[0033] (4) The probe support that moves up and down and slides under the push of the cantilevered sensing top rod can move up and down with the sensing probe, thereby achieving the technical purpose of automatically lifting before the frame slide moves horizontally and automatically lowering after the frame slide moves horizontally.

[0034] (5) Since the longitudinal movement of the frame beam is driven by the lateral movement of the frame slide, the longitudinal movement of the frame beam must occur during the lateral movement of the frame slide. Therefore, the sensing probe is also lifted when the frame beam moves longitudinally, which greatly reduces the chance of the sensing probe being hit and worn.

[0035] (6) Through the linkage of the anti-torsion single-drive longitudinal movement mechanism, on the one hand, when the intermittent transverse movement drive mechanism slides laterally to the end, the longitudinal sliding of the anti-torsion single-drive longitudinal movement mechanism and the rotation direction switching of the drive motor can be automatically controlled; on the other hand, the longitudinal movement of the frame-type crossbeam can be controlled by gear rack transmission, thereby achieving the technical effect of automatic longitudinal advancement and return after reaching the end.

[0036] (7) The winding drum rotates in opposite directions with its two self-rotating shafts, and can move both ends of the frame beam in the same direction at the same time through the symmetrically arranged and meshing longitudinal moving gears and longitudinal driven racks, thus avoiding the problem of the frame beam being easily deflected and stuck when driven on one side.

[0037] (8) The impact of the driving pin on the lever part can cause the longitudinal shift dial wheel to rotate, and at the same time, the self-rotating shaft and the longitudinal moving gear can rotate as a whole. On the one hand, the longitudinal displacement of the frame beam can be driven by the engagement of the longitudinal moving gear and the longitudinal driven rack. On the other hand, the reversing switch can be pushed and pressed by the rotating lever part, thereby switching the rotation direction of the driving motor.

[0038] (9) Through the cooperation between the longitudinal moving ball body and the arc-shaped groove of the frame, on the one hand, the resistance of the longitudinal moving ball body when it moves along the side of the main frame can be actively controlled; on the other hand, the longitudinal anti-displacement component can be limited by the arc-shaped groove of the frame, so as to avoid the frame-type crossbeam from deviating due to the vibration of the device itself during the non-displacement stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A three-dimensional diagram of a detection device for hollows at the bottom of concrete proposed by the present invention;

[0040] Figure 2 This is a front view of a detection device for hollows at the bottom of concrete proposed by the present invention;

[0041] Figure 3 This is a left view of a detection device for hollows at the bottom of concrete proposed by the present invention;

[0042] Figure 4 A top view of a detection device for hollows at the bottom of concrete proposed by the present invention;

[0043] Figure 5 for Figure 2 A cross-sectional view along the cutting line AA;

[0044] Figure 6 for Figure 3 A cross-sectional view along the cutting line BB;

[0045] Figure 7 An exploded view of a detection device for a hollow concrete bottom provided by the present invention;

[0046] Figure 8 for Figure 6 A partial enlarged view of point Ⅰ in the middle;

[0047] Fig. 9 for Figure 6 A partial enlarged view of the middle II;

[0048] Fig.10 for Figure 5 A partial enlarged view of the middle part III;

[0049] Fig.11 for Figure 7 A partial enlarged view of the middle IV;

[0050] Fig.12 for Figure 4 A partial enlarged view of point V in the middle.

[0051] Among them, 1. intermittent transverse driving mechanism, 2. probe adaptive lifting mechanism, 3. anti-torsion single-drive longitudinal mechanism, 4. fixed frame mechanism, 5. transverse guide assembly, 6. rotating wheel assembly, 7. rotating wheel driving assembly, 8. transverse anti-displacement assembly, 9. frame slide plate, 10. transverse slider, 11. transverse slide rail, 12. bridge beam, 13. intermittent rotating wheel, 14. transverse driven rack, 15. driving motor, 16. driving gear, 17. reversing switch, 18. transverse elastic plate, 19. transverse ball seat, 20. transverse ball body, 21. motor mounting plate, 22. cylindrical part, 23. square inner hole, 24. fan-shaped tooth part, 25. driven gear ring part, 26. annular top platform, 27. spring support, 28. Sedimentation spring, 29. Probe support, 30. Induction probe, 31. L-shaped plate, 32. Cantilever induction top rod, 33. Beam assembly, 34. Longitudinal transmission assembly, 35. Longitudinal drive assembly, 36. Frame beam, 37. Rotating shaft bracket, 38. Rotating shaft, 39. Longitudinal moving gear, 40. Longitudinal driven rack, 41. Winding drum, 42. Linkage rope, 43. Longitudinal shift dial wheel, 44. Driving striker, 45. Beam arc groove, 46. Lever part, 47. Frame assembly, 48. Longitudinal anti-displacement assembly, 49. Main frame, 50. Frame arc groove, 51. Longitudinal guide rail, 52. Longitudinal slider, 53. Longitudinal elastic plate, 54. Longitudinal ball seat, 55. Longitudinal ball body, 56. Foot cup.

[0052] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0054] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0055] like Figure 1 to Figure 12As shown, the present invention proposes a detection device for voids at the bottom of concrete, comprising an intermittent transverse driving mechanism 1, a probe adaptive lifting mechanism 2, an anti-torsion single-drive longitudinal moving mechanism 3 and a fixed frame mechanism 4, the intermittent transverse driving mechanism 1 is arranged on the anti-torsion single-drive longitudinal moving mechanism 3, the anti-torsion single-drive longitudinal moving mechanism 3 is arranged on the fixed frame mechanism 4, and the probe adaptive lifting mechanism 2 is arranged on the intermittent transverse driving mechanism 1.

[0056] The fixed frame mechanism 4 includes a frame assembly 47 and a longitudinal anti-displacement assembly 48. The frame assembly 47 includes a main frame 49, a foot cup 56, a longitudinal guide rail 51 and a longitudinal slider 52. The foot cup 56 is arranged below the main frame 49. The longitudinal driven rack 40 is arranged on the main frame 49. The main frame 49 is provided with an array of frame arc grooves 50. The longitudinal guide rail 51 is arranged on the main frame 49. The longitudinal slider 52 is engaged and slidably arranged on the longitudinal guide rail 51. The frame beam 36 is arranged on the longitudinal slider 52. The longitudinal anti-displacement assembly 48 is arranged on the frame beam 36.

[0057] The longitudinal anti-displacement component 48 includes a longitudinal elastic plate 53, a longitudinal ball seat 54 and a longitudinal ball body 55. The longitudinal elastic plate 53 is arranged on the frame-type crossbeam 36, the longitudinal ball seat 54 is arranged at the end of the longitudinal elastic plate 53, the longitudinal ball body 55 is rollingly arranged in the longitudinal ball seat 54, the longitudinal ball body 55 is rollingly arranged on the side of the main frame 49, and the longitudinal ball body 55 and the frame arc groove 50 are in rolling contact.

[0058] Through the cooperation between the longitudinal movement ball body 55 and the frame arc groove 50, on the one hand, the resistance of the longitudinal movement ball body 55 when moving along the side of the main frame 49 can be actively controlled. On the other hand, the longitudinal anti-displacement component 48 can be limited by the frame arc groove 50 to avoid the frame beam 36 from offsetting due to the vibration of the device itself during the non-displacement stage.

[0059] The anti-torsion single-drive longitudinal mechanism 3 includes a crossbeam assembly 33 , a longitudinal transmission assembly 34 and a longitudinal drive assembly 35 . The crossbeam assembly 33 is arranged on the fixed frame mechanism 4 , the longitudinal transmission assembly 34 is arranged at both ends of the crossbeam assembly 33 , and the longitudinal drive assembly 35 is arranged on the longitudinal transmission assembly 34 .

[0060] Through the linkage of the anti-torsion single-drive longitudinal movement mechanism 3, on the one hand, when the intermittent transverse movement drive mechanism 1 slides laterally to the end, the longitudinal sliding of the anti-torsion single-drive longitudinal movement mechanism 3 and the rotation direction switching of the drive motor 15 can be automatically controlled; on the other hand, the longitudinal movement of the frame beam 36 can be controlled by gear rack transmission, thereby achieving the technical effect of automatic longitudinal advancement and return after reaching the end.

[0061] The beam assembly 33 includes a frame beam 36, a shaft bracket 37 and a self-rotating shaft 38. The frame beam 36 is arranged on the fixed frame mechanism 4. The transverse slide rail 11 and the transverse driven rack 14 are arranged on the frame beam 36. The frame beam 36 is provided with an array of beam arc grooves 45. The transverse ball body 20 is rollingly arranged on the side of the frame beam 36. The transverse ball body 20 is rollingly contacted with the beam arc groove 45. The shaft bracket 37 is fixedly connected to the two ends of the frame beam 36, and the self-rotating shaft 38 is rotatably arranged on the shaft bracket 37.

[0062] The longitudinal transmission assembly 34 includes a longitudinal moving gear 39, a longitudinal driven rack 40, a winding drum 41 and a linkage rope 42. The longitudinal moving gear 39 is fixedly connected to the self-rotating shaft 38, and the longitudinal driven rack 40 is arranged on the fixed frame mechanism 4. The longitudinal moving gear 39 and the longitudinal driven rack 40 are meshed for transmission. The winding drum 41 is fixedly connected to the self-rotating shaft 38. The two ends of the linkage rope 42 are respectively wound around different winding drums 41. Through the cross linkage of the linkage rope 42, the two winding drums 41 will rotate simultaneously in different directions.

[0063] The winding drum 41 rotates in opposite directions with the two rotating shafts 38, and can move both ends of the frame beam 36 in the same direction at the same time through the symmetrically arranged and meshing longitudinal moving gears 39 and the longitudinal driven rack 40, thereby avoiding the problem of the frame beam 36 being easily deflected and stuck when driven on one side.

[0064] The longitudinal shift driving assembly 35 includes a longitudinal shift dial wheel 43 and a driving striker 44 . The longitudinal shift dial wheel 43 is fixedly connected to the rotating shaft 38 . A shift rod portion 46 is evenly distributed in a ring shape on the longitudinal shift dial wheel 43 . The driving striker 44 is symmetrically arranged on the frame-type slide plate 9 .

[0065] By driving the striker 44 to hit the lever part 46, the longitudinal shift dial 43 can be rotated, and at the same time, the self-rotating shaft 38 and the longitudinal moving gear 39 can be rotated as a whole. On the one hand, the longitudinal displacement of the frame beam 36 can be driven by the engagement of the longitudinal moving gear 39 and the longitudinal driven rack 40. On the other hand, the reversing switch 17 can be pushed and pressed by the rotating lever part 46, thereby switching the rotation of the drive motor 15 in the opposite direction.

[0066] The intermittent transverse driving mechanism 1 includes a transverse guiding assembly 5, a rotating wheel assembly 6, a rotating wheel driving assembly 7 and a transverse anti-displacement assembly 8. The transverse guiding assembly 5 is arranged on the anti-torsion single-drive longitudinal moving mechanism 3, the rotating wheel assembly 6 is arranged on the transverse guiding assembly 5, the rotating wheel driving assembly 7 is arranged on the transverse guiding assembly 5, and the transverse anti-displacement assembly 8 is arranged below the transverse guiding assembly 5.

[0067] The intermittent transverse movement of the drive mechanism 1 can move the probe adaptive lifting mechanism 2 laterally. Moreover, the intermittent transverse movement drive mechanism 1 can automatically move the anti-torsion single-drive longitudinal movement mechanism 3 longitudinally by one unit when it moves to the end and switch the rotation direction of the drive motor 15 by means of a mechanical switch. The non-software-controlled reversing switch 17 not only means lower requirements for lower motors and lower costs, but also a lower failure rate and higher stability for construction sites with relatively harsh conditions.

[0068] The transverse guide assembly 5 includes a frame slide 9, a transverse slider 10 and a transverse slide rail 11. The transverse slide rail 11 is arranged on the anti-torsion single-drive longitudinal movement mechanism 3. The transverse slider 10 is engaged and slidably arranged on the transverse slide rail 11. The frame slide 9 is arranged on the transverse slider 10. A motor mounting plate 21 is provided on the frame slide 9.

[0069] The wheel assembly 6 includes a bridge beam 12, an intermittent wheel 13 and a transverse driven rack 14. The bridge beam 12 is fixedly connected to the frame-type skateboard 9. A cylindrical portion 22 is provided below the bridge beam 12. A through square inner hole 23 is provided at the center of the cylindrical portion 22. The intermittent wheel 13 is rotatably arranged on the cylindrical portion 22. A fan-shaped tooth portion 24 is provided on the intermittent wheel 13. An annular top platform 26 is provided on the intermittent wheel 13 at a position opposite to the fan-shaped tooth portion 24. A driven gear ring portion 25 is also provided on the intermittent wheel 13. The transverse driven rack 14 is arranged on the anti-twist single-drive longitudinal movement mechanism 3.

[0070] Through the intermittent cooperation between the sector tooth portion 24 and the transverse driven rack 14, the drive motor 15 can push the frame slide 9 to slide intermittently during continuous rotation, so that the probe adaptive lifting mechanism 2 can perform cavity detection at this position during the period when the frame slide 9 is stationary.

[0071] The wheel driving assembly 7 includes a driving motor 15, a driving gear 16 and a reversing switch 17. The driving motor 15 is arranged on the motor mounting plate 21, the driving gear 16 is fixedly connected to the output shaft of the driving motor 15, the reversing switch 17 is arranged on the driving motor 15, the driving gear 16 and the driven gear ring part 25 are meshed for transmission, and the reversing switch 17 can control the rotation direction of the driving motor 15.

[0072] The transverse anti-displacement component 8 includes a transverse elastic plate 18, a transverse ball seat 19 and a transverse ball body 20. The transverse elastic plate 18 is arranged below the frame-type slide plate 9, the transverse ball seat 19 is fixed to the end of the transverse elastic plate 18, and the transverse ball body 20 is rotatably arranged in the transverse ball seat 19.

[0073] Through the cooperation between the lateral anti-displacement component 8 and the arc-shaped groove 45 of the cross beam, on the one hand, the resistance of the lateral anti-displacement component 8 when moving along the side of the frame-type cross beam 36 can be actively controlled. On the other hand, the lateral anti-displacement component 8 can be limited by the arc-shaped groove 45 of the cross beam, so as to avoid the frame slide plate 9 from offsetting due to the vibration of the device itself during the non-displacement stage.

[0074] The probe adaptive lifting mechanism 2 includes a spring support 27, a sedimentation spring 28, a probe support 29 and a sensing probe 30. The spring support 27 is fixedly connected to the bridge beam 12. The probe support 29 is slidably arranged in the square inner hole 23. The sedimentation spring 28 is arranged between the probe support 29 and the spring support 27. An L-shaped plate 31 and a cantilevered sensing top rod 32 are also provided on one side of the probe support 29. The cantilevered sensing top rod 32 is in sliding contact with the annular top platform 26. The sensing probe 30 is detachably arranged at the bottom of the probe support 29.

[0075] The probe support 29 that moves up and down and slides under the push of the cantilever sensing top rod 32 can move up and down with the sensing probe 30, thereby achieving the technical purpose of automatically lifting before the frame slide 9 moves horizontally and automatically lowering after the frame slide 9 moves horizontally.

[0076] Since the longitudinal movement of the frame beam 36 is driven by the lateral movement of the frame slide 9, the longitudinal movement of the frame beam 36 must occur during the lateral movement of the frame slide 9. Therefore, the sensing probe 30 is also lifted when the frame beam 36 moves longitudinally, which greatly reduces the probability of the sensing probe 30 being hit and worn.

[0077] When using the device, the user first needs to place the device at the target position where the pile legs are to be placed, and make the target position roughly located at the center of the device;

[0078] Then, the frame-type slide plate 9 is adjusted to the starting corner position; then, the driving motor 15 is powered, and the driving motor 15 can drive the intermittent rotating wheel 13 to rotate through the meshing transmission between the driving gear 16 and the driven gear ring portion 25. During the rotation of the intermittent rotating wheel 13, if the sector-shaped tooth portion 24 and the transverse driven rack 14 are in contact and meshing, then the intermittent rotating wheel 13 will drive the frame-type slide plate 9 to slide laterally for a unit distance; if the sector-shaped tooth portion 24 and the transverse driven rack 14 are not in contact, then the intermittent rotating wheel 13 will idle in situ;

[0079] When the frame-type slide plate 9 slides, the transverse elastic plate 18 will overcome its own elastic force and bend, thereby allowing the transverse ball seat 19 and the transverse ball body 20 to avoid, and then the transverse ball body 20 enters the next crossbeam arc groove 45 again. Due to the elastic force of the transverse elastic plate 18, the frame-type slide plate 9 will not have a large deviation when it is in a non-driving state;

[0080] Since the annular top platform 26 and the fan-shaped tooth portion 24 are located in opposite directions, before the fan-shaped tooth portion 24 and the transverse driven rack 14 start to engage and transmit, the cantilevered sensing top rod 32 will first be lifted upward with the probe support 29 supported by the annular top platform 26, and then the sensing probe 30 will be lifted up. After the engagement and transmission between the fan-shaped tooth portion 24 and the transverse driven rack 14 is completed, the cantilevered sensing top rod 32 is separated from the annular top platform 26, and the sensing probe 30 is restored to the sunken state under the elastic force of the sinking spring 28.

[0081] When the frame slide plate 9 moves horizontally to the end position, the driving striker 44 will cause the longitudinal shift dial wheel 43 to rotate by hitting and pushing the lever portion 46. The longitudinal shift dial wheel 43 can rotate with the self-rotating shaft 38, the longitudinal moving gear 39 and the winding drum 41 while rotating. Through the linkage of the linkage rope 42, the two self-rotating shafts 38 will rotate in different directions at the same time. Therefore, under the transmission of the two sets of symmetrically arranged longitudinal moving gears 39 and the longitudinal driven rack 40, the frame beam 36 will move longitudinally by a unit angle.

[0082] The two-end driving method avoids the problem that the frame beam 36 is easily deflected and stuck when driving on one side;

[0083] When the longitudinal shift dial wheel 43 rotates, it will also press the reversing switch 17 through the lever portion 46, thereby switching the rotation direction of the drive motor 15. When the reversing switch 17 is pressed and switched, the longitudinal shift ball body 55 just enters the arc groove 50 of the frame but has not yet reached the center position of the arc groove 50 of the frame. Therefore, after the frame slide 9 slides in the opposite direction and drives the striker 44 and the lever portion 46 to separate, the frame crossbeam 36 will continue to slide until the longitudinal shift ball body 55 reaches the center position of the arc groove 50 of the frame. Therefore, the next time the driving striker 44 contacts the lever portion 46 again, it can still hit and push the lever portion 46.

[0084] Through the cooperation between the longitudinal movement ball body 55 and the frame arc groove 50, on the one hand, the resistance of the longitudinal movement ball body 55 when moving along the side of the main frame 49 can be actively controlled. On the other hand, the longitudinal anti-displacement component 48 can be limited by the frame arc groove 50 to avoid the frame beam 36 from offsetting due to the vibration of the device itself during the non-displacement stage.

[0085] Since the longitudinal movement of the frame beam 36 is driven by the lateral movement of the frame slide 9, the longitudinal movement of the frame beam 36 must occur during the lateral movement of the frame slide 9. Therefore, the sensing probe 30 is also lifted when the frame beam 36 moves longitudinally, which greatly reduces the probability of the sensing probe 30 being hit and worn.

[0086] The frame slide 9 can move laterally intermittently during the continuous rotation of the driving motor 15. When the lateral movement reaches the limit position, the frame beam 36 will drop a unit distance, and the frame slide 9 will turn back. The sensing probe 30 will automatically rise and recover when the frame slide 9 moves, and will automatically extend and perform cavity detection when the frame slide 9 is stationary. Through this detection method, the intersection positions on the grid can be detected in turn, reducing the workload of manual operation and improving positioning accuracy.

[0087] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0088] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A device for detecting voids at the bottom of concrete. It is characterized in that The invention comprises an intermittent transverse driving mechanism (1), a probe adaptive lifting mechanism (2), an anti-torsion single-drive longitudinal mechanism (3) and a fixed frame mechanism (4), wherein the intermittent transverse driving mechanism (1) is arranged on the anti-torsion single-drive longitudinal mechanism (3), the anti-torsion single-drive longitudinal mechanism (3) is arranged on the fixed frame mechanism (4), and the probe adaptive lifting mechanism (2) is arranged on the intermittent transverse driving mechanism (1); The intermittent transverse drive mechanism (1) comprises a transverse guide assembly (5), a rotating wheel assembly (6), a rotating wheel drive assembly (7) and a transverse anti-displacement assembly (8), wherein the transverse guide assembly (5) is arranged on the anti-twist single-drive longitudinal mechanism (3), the rotating wheel assembly (6) is arranged on the transverse guide assembly (5), the rotating wheel drive assembly (7) is arranged on the transverse guide assembly (5), and the transverse anti-displacement assembly (8) is arranged below the transverse guide assembly (5); The anti-twist single-drive longitudinal movement mechanism (3) comprises a crossbeam assembly (33), a longitudinal movement transmission assembly (34) and a longitudinal movement drive assembly (35); the crossbeam assembly (33) is arranged on a fixed frame mechanism (4); the longitudinal movement transmission assembly (34) is arranged at both ends of the crossbeam assembly (33); and the longitudinal movement drive assembly (35) is arranged on the longitudinal movement transmission assembly (34); The transverse guide assembly (5) comprises a frame slide (9), a transverse slider (10) and a transverse slide rail (11); the transverse slide rail (11) is arranged on the anti-torsion single-drive longitudinal mechanism (3); the transverse slider (10) is slidably arranged on the transverse slide rail (11); the frame slide (9) is arranged on the transverse slider (10); and a motor mounting plate (21) is arranged on the frame slide (9); The wheel assembly (6) comprises a bridge-type crossbeam (12), an intermittent wheel (13) and a transverse driven rack (14); the bridge-type crossbeam (12) is fixedly connected to a frame-type slide plate (9); a cylindrical portion (22) is provided below the bridge-type crossbeam (12); a through square inner hole (23) is provided at the center of the cylindrical portion (22); the intermittent wheel (13) is rotatably arranged on the cylindrical portion (22); a sector-shaped tooth portion (24) is provided on the intermittent wheel (13); an annular top platform (26) is provided on the intermittent wheel (13) at a position opposite to the sector-shaped tooth portion (24); a driven gear ring portion (25) is also provided on the intermittent wheel (13); and the transverse driven rack (14) is arranged on an anti-twist single-drive longitudinal shift mechanism (3); The wheel drive assembly (7) comprises a drive motor (15), a driving gear (16) and a reversing switch (17); the drive motor (15) is arranged on a motor mounting plate (21); the driving gear (16) is fixedly connected to an output shaft of the drive motor (15); the reversing switch (17) is arranged on the drive motor (15); the driving gear (16) and the driven gear ring (25) are meshed for transmission; and the reversing switch (17) can control the rotation direction of the drive motor (15); The probe adaptive lifting mechanism (2) comprises a spring support (27), a sinking spring (28), a probe support (29) and a sensing probe (30); the spring support (27) is fixedly connected to the bridge beam (12); the probe support (29) is slidably arranged in the square inner hole (23); the sinking spring (28) is arranged between the probe support (29) and the spring support (27); an L-shaped plate (31) and a cantilever sensing top rod (32) are further arranged on one side of the probe support (29); the cantilever sensing top rod (32) is in sliding contact with the annular top platform (26); and the sensing probe (30) is detachably arranged at the bottom of the probe support (29).

2. A device for detecting hollows at the bottom of concrete according to claim 1, Features: The transverse anti-displacement assembly (8) comprises a transverse elastic plate (18), a transverse ball seat (19) and a transverse ball body (20); the transverse elastic plate (18) is arranged below the frame-type slide plate (9); the transverse ball seat (19) is fixed to the end of the transverse elastic plate (18); and the transverse ball body (20) is rotatably arranged in the transverse ball seat (19).

3. A detection device for hollow spaces at the bottom of concrete according to claim 2, Features: The crossbeam assembly (33) comprises a frame crossbeam (36), a rotating shaft bracket (37) and a self-rotating rotating shaft (38); the frame crossbeam (36) is arranged on a fixed frame mechanism (4); the transverse sliding rail (11) and the transverse driven rack (14) are arranged on the frame crossbeam (36); an array of crossbeam arc grooves (45) are arranged on the frame crossbeam (36); the transverse moving ball body (20) is rollingly arranged on the side of the frame crossbeam (36); the transverse moving ball body (20) and the crossbeam arc groove (45) are in rolling contact; the rotating shaft bracket (37) is fixedly connected to both ends of the frame crossbeam (36); and the self-rotating rotating shaft (38) is rotatably arranged on the rotating shaft bracket (37).

4. A detection device for hollows at the bottom of concrete according to claim 3, Features: The longitudinal transmission assembly (34) comprises a longitudinal moving gear (39), a longitudinal driven rack (40), a winding drum (41) and a linkage rope (42); the longitudinal moving gear (39) is fixedly connected to the self-rotating shaft (38); the longitudinal driven rack (40) is arranged on the fixed frame mechanism (4); the longitudinal moving gear (39) and the longitudinal driven rack (40) are meshed for transmission; the winding drum (41) is fixedly connected to the self-rotating shaft (38); two ends of the linkage rope (42) are respectively wound around different winding drums (41); through the cross linkage of the linkage rope (42), the two winding drums (41) will rotate simultaneously in different directions.

5. A device for detecting hollows at the bottom of concrete according to claim 4, Features: The longitudinal shift drive assembly (35) comprises a longitudinal shift dial wheel (43) and a driving striker (44); the longitudinal shift dial wheel (43) is fixedly connected to the self-rotating shaft (38); a shift rod portion (46) is evenly distributed in an annular shape on the longitudinal shift dial wheel (43); and the driving striker (44) is symmetrically arranged on the frame-type slide plate (9).

6. A device for detecting hollows at the bottom of concrete according to claim 5, Features: The fixed frame mechanism (4) comprises a frame assembly (47) and a longitudinal anti-displacement assembly (48); the frame assembly (47) comprises a main frame (49), a foot cup (56), a longitudinal guide rail (51) and a longitudinal slider (52); the foot cup (56) is arranged below the main frame (49); the longitudinal driven rack (40) is arranged on the main frame (49); the main frame (49) is provided with frame arc grooves (50) in an array; the longitudinal guide rail (51) is arranged on the main frame (49); the longitudinal slider (52) is slidably engaged with the longitudinal guide rail (51); the frame crossbeam (36) is arranged on the longitudinal slider (52); and the longitudinal anti-displacement assembly (48) is arranged on the frame crossbeam (36).

7. A device for detecting hollows at the bottom of concrete according to claim 6, Features: The longitudinal anti-displacement component (48) comprises a longitudinal elastic plate (53), a longitudinal ball seat (54) and a longitudinal ball body (55); the longitudinal elastic plate (53) is arranged on the frame-type crossbeam (36); the longitudinal ball seat (54) is arranged at the end of the longitudinal elastic plate (53); the longitudinal ball body (55) is rollingly arranged in the longitudinal ball seat (54); the longitudinal ball body (55) is rollingly arranged on the side of the main frame (49); and the longitudinal ball body (55) is in rolling contact with the frame arc groove (50).

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