Bridge prestress detection device

Abstract

The invention relates to the technical field of bridge prestress detection, in particular to a bridge prestress detection device which comprises a prestress detection device body and an ultrasonic detector, four dampers are fixedly connected to the upper side of the prestress detection device body, and a top plate is fixedly arranged on the upper sides of the four dampers. The upper side of the prestress detection device main body is slidably connected with rubber sliding seats distributed in an array, elastic force of three groups of springs is utilized to consume and buffer vibration force borne by the prestress detection device, and four dampers are matched to consume vibration energy to reduce the vibration force, so that the vibration amplitude is gradually reduced, and the detection precision is improved. And finally, vibration is stopped, so that the buffering effect of the prestress detection device can be enhanced, damage to machine elements in the prestress detection device is avoided, the ultrasonic detector is started, a probe of the ultrasonic detector releases ultrasonic waves, and then the ultrasonic detector receives the reflected ultrasonic waves, so that whether gaps exist in the bridge or not is detected and analyzed.

Description

Technical Field

[0001] The invention relates to the technical field of bridge prestress detection, in particular to a bridge prestress detection device. Background Art

[0002] Prestressing plays a vital role in bridge engineering. It can improve the bearing capacity of the bridge and increase its service life. At the same time, it can also reduce the deformation and cracks of the bridge. In order to ensure the normal use and safe operation of the bridge, the prestressing detection device of the bridge is used to detect the changes in prestressing, so as to timely discover and solve problems and ensure the safety and reliability of the bridge.

[0003] A Chinese patent (application number CN201820338508.6) discloses a bridge prestressed detection device, including a box body, a storage slot with an upward opening provided in the box body, and a cover plate is rotatably connected to the opening of the storage slot, and the side wall of the cover plate is also provided with a closing device arranged in cooperation with the storage slot, a data processor is provided in the storage slot, and the data processor is connected to an acoustic wave detector through a wire, and the acoustic wave detector is fixedly connected to the inner wall of the cover plate through a rubber band, both side walls of the data processor are fixedly connected with connecting blocks, and the inner wall of the storage slot is provided with a sliding cavity arranged in cooperation with the connecting block, and the upper and lower side walls of the connecting block are respectively connected to the upper and lower inner walls of the sliding cavity through a first spring, a mounting slot with a downward opening provided in the box body, and an elastic shoulder strap is also connected to the mounting slot, and a handle is also provided on one side wall of the box body.

[0004] Although the above-mentioned bridge prestress detection device can be easy to carry, the existing bridge prestress detection device is generally a relatively sophisticated detection instrument, which is usually directly and rigidly placed on a cart for use, so that the stress detection device can be flexibly moved to perform prestress detection on the bridge. If the cart shakes too much, it will cause the prestress detection device to vibrate, which may easily damage the internal machine components and make it impossible to perform detection, thereby affecting the buffering effect of the prestress detection device, reducing the service life of the prestress detection device, and being unfavorable for use. Summary of the invention

[0005] The purpose of the present invention is to provide a bridge prestress detection device to solve the problems raised in the above background technology.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A bridge prestress detection device comprises a prestress detection device body and an ultrasonic detector, wherein four dampers are fixedly connected to the upper side of the prestress detection device body, a top plate is fixedly provided on the upper side of the four dampers, a rubber sliding seat distributed in an array is slidably connected to the upper side of the prestress detection device body, and a telescopic seat distributed in an array is slidably connected to the lower side of the top plate;

[0008] A spring 1 is fixedly connected between the rubber sliding seat and the main body of the prestressed stress detection device, a spring 2 is fixedly connected between the telescopic seat and the top plate, two bases are fixedly installed on the lower side of the main body of the prestressed stress detection device, two mounting blocks are clamped on one side of the two bases, universal wheels are fixed on the lower sides of the four mounting blocks, four first telescopic plates are slidably connected to the bottom ends of the two bases, and two second telescopic plates are slidably connected to the bottom ends of the two bases.

[0009] Preferably, a first spring distributed in an array is fixedly connected between the first telescopic plate and the base, a second spring distributed in an array is fixedly connected between the first telescopic plate and the base, L-shaped seats are fixedly installed at both ends of the main body of the prestressed detection device, two limit plates are fixedly installed on the lower side of the L-shaped seat, the limit plates are located inside the L-shaped seat, and spring three distributed in an array is fixedly installed between the two L-shaped seats and the limit plates.

[0010] Preferably, two symmetrically arranged fixed plates are fixedly connected to the upper side of the top plate, two smooth rods are fixedly connected to the inner side surfaces of the two fixed plates, two symmetrically arranged U-shaped slides are slidably installed on the outer surfaces of the two smooth rods, a U-shaped seat is fixedly installed on the lower side of the top plate, the two U-shaped slides are connected to a movable rotating plate that rotates together with the inside of the U-shaped seat, and four springs are connected in an array between the two U-shaped slides and the fixed plates.

[0011] Preferably, a U-shaped plate is fixedly provided on the upper side of the top plate, a gear rotating rod is rotatably installed on the upper side of the U-shaped plate, a mounting frame is fixedly provided on the upper side of the gear rotating rod, a threaded rotating rod is fixedly installed on one side of the mounting frame, an L-shaped lifting plate is threadedly connected to the outer surface of the threaded rotating rod, a placement seat is fixedly provided on the front side of the L-shaped lifting plate, the ultrasonic detector is located inside the placement seat, the upper side of the threaded rotating rod passes through the L-shaped plate and extends to the upper side of the L-shaped plate, and the upper side of the threaded rotating rod is fixedly connected to a servo motor through a motor mounting plate.

[0012] Preferably, a fixing seat is fixedly connected to the right side of the placement seat, a probe is fixedly provided on one side of the ultrasonic detector, the probe is located inside the fixing seat, the lower side of the probe passes through the fixing seat and extends to the lower side of the fixing seat, a plug plate for fixing the probe is clamped inside the fixing seat, two second limit rods are fixedly installed between the mounting frame and the L-shaped plate, and the outer surfaces of the two second limit rods are slidably connected to the inside of the L-shaped lifting plate.

[0013] Preferably, the inner side surface of the placement seat is slidably connected to two U-shaped baffles for fixing the ultrasonic detector, a third spring is fixedly installed between the two U-shaped baffles and the placement seat, the upper side of the placement seat is rotatably connected to two rotating shafts, and the upper sides of the two rotating shafts are fixedly connected to rubber pressure plates for fixing the ultrasonic detector.

[0014] Preferably, a fixed concave plate is fixedly connected to the upper side of the top plate, a T-block is slidably installed inside the fixed concave plate, a rack is fixedly installed on the upper side of the T-block, the rack and the gear rotating rod are meshed with each other, the rear side of the rack is fixedly connected to the first side plate, the upper side of the top plate is fixedly connected to the second side plate, and an electric push rod is fixedly provided between the first side plate and the second side plate.

[0015] Preferably, the L-shaped lifting plate is fixedly connected internally with two vertical rods, and sliders are slidably installed on the outer surfaces of the two vertical rods. A protective cover for protecting the ultrasonic detector is fixed on the front side of the slider, and the protective cover is located above the ultrasonic detector. The rear side of the slider is threadedly connected with two fastening bolts for fixing the protective cover.

[0016] Preferably, the inner side surfaces of the two bases are rotatably connected to a double-headed screw, the outer surface of the double-headed screw is threadedly connected to two symmetrically arranged threaded cross plates, two positioning blocks for fixing the mounting blocks are fixedly provided on one side of the two threaded cross plates, an operating hand wheel is fixedly connected to the middle part of the outer surface of the double-headed screw, the inner side surfaces of the two bases are fixedly connected to two first limit rods arranged in parallel, and the outer surfaces of the two first limit rods are slidably connected to the inside of the threaded cross plates.

[0017] Preferably, the telescopic seat is located above the rubber slide, a power distribution cabinet is fixedly provided on the upper side of the top plate, an armrest frame is fixedly connected to the rear side of the base, a groove is opened on the upper side of the rubber slide, the groove is adapted to the telescopic seat, and the lower side of the telescopic seat is slidably installed with the upper side of the rubber slide through the groove.

[0018] Beneficial effects of the present invention:

[0019] 1. The present invention can consume and buffer the vibration force exerted on the prestressed detection device by utilizing the elastic force of three groups of springs, and at the same time cooperate with four dampers to consume vibration energy to reduce the vibration force, so that the vibration amplitude gradually decreases and finally stops the vibration, thereby enhancing the buffering effect of the prestressed detection device, avoiding damage to the internal machine components, and prolonging the service life of the prestressed detection device.

[0020] 2. The present invention can position the ultrasonic detector by utilizing two elastic U-shaped baffles and two rubber pressure plates, and then the L-shaped lifting plate drives the probe to move downward so that it fits onto the bridge ground, and then the ultrasonic detector is started, and the probe of the ultrasonic detector releases ultrasonic waves, and the ultrasonic detector receives the reflected ultrasonic waves to detect and analyze whether there are gaps inside the bridge.

[0021] 3. The present invention can be used to adjust the detection position of the ultrasonic detector as the gear lever rotates, thereby increasing the detection range of the ultrasonic detector without moving the entire prestressed detection device, saving time and effort and improving the detection efficiency of the prestressed detection device. At the same time, the protective cover can be placed above the ultrasonic detector to effectively protect the ultrasonic detector and prevent the ultrasonic detector from being exposed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 yes Figure 1 Installation diagram of the middle rubber slide and telescopic seat;

[0025] Figure 3 yes Figure 1 Structural diagram of the middle U-shaped slide plate, U-shaped seat and movable rotating plate;

[0026] Figure 4 yes Figure 3 Schematic diagram of the structure of the middle threaded cross plate and the positioning block;

[0027] Figure 5 yes Figure 4 A schematic diagram of the installation of the first telescopic plate and the second telescopic plate;

[0028] Figure 6 yes Figure 1 Installation diagram of the middle damper;

[0029] Figure 7 yes Figure 1 Installation diagram of the middle gear rotating rod and rack;

[0030] Figure 8 yes Figure 7 Schematic diagram of the structure of the middle slider and the protective cover;

[0031] Fig. 9 yes Figure 8 Installation diagram of the center stand and ultrasonic detector;

[0032] Fig.10 yes Fig. 9 Installation diagram of the fixing base and probe.

[0033] The reference numerals in the figures are as follows:

[0034] 1. Main body of prestressed testing device; 2. Ultrasonic detector; 3. Damper; 4. Top plate; 5. Rubber slide seat; 6. Spring 1; 7. Telescopic seat; 8. Spring 2; 9. Mounting block; 10. Universal wheel; 11. First telescopic plate; 12. First spring; 13. Second telescopic plate; 14. Second spring; 15. Base; 16. L-shaped seat; 17. Limit plate; 18. Spring 3; 19. U-shaped plate; 20. Gear rotating rod; 21. Fixed plate; 22. Smooth rod; 23. U-shaped slide plate; 24. Spring 4; 25. U-shaped seat; 26. Active rotary plate; 27. Double-headed screw; 28. Operating hand wheel; 29. ​​Threaded cross plate ;30. Positioning block;31. First limiting rod;32. Mounting frame;33. L-shaped plate;34. Threaded rotating rod;35. L-shaped lifting plate;36. Placement seat;37. Fixed seat;38. Probe;39. Insert plate;40. Rotating axis;41. Rubber pressure plate;42. U-shaped baffle;43. Third spring;44. Servo motor;45. Second limiting rod;46. Fixed concave plate;47. T-block;48. Rack;49. First side plate;50. Second side plate;51. Electric push rod;52. Vertical rod;53. Sliding block;54. Fastening bolt;55. Protective cover;66. Groove;67. Distribution cabinet;68. Handrail. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] A bridge prestress detection device, such as Figure 1-10As shown, it includes a prestressed stress detection device body 1 and an ultrasonic detector 2. The ultrasonic detector 2 is installed on the prestressed stress detection device body 1 so that the bridge can be prestressed. The defects and stress distribution inside the bridge are detected by emitting ultrasonic waves and receiving echo signals. Four dampers 3 are fixedly connected to the upper side of the prestressed stress detection device body 1, and a top plate 4 is fixedly provided on the upper side of the four dampers 3. The upper side of the prestressed stress detection device body 1 is slidably connected to an array-distributed rubber slide 5, and the lower side of the top plate 4 is slidably connected to an array-distributed telescopic seat 7. Through the installation and use of the rubber slide 5 and the telescopic seat 7, the telescopic seat 7 with elastic force can be telescoped back and forth inside the elastic rubber slide 5, so as to elastically buffer the ultrasonic detector 2 and better protect the entire prestressed stress detection device.

[0037] A spring 1 6 is fixedly connected between the rubber slide 5 and the main body 1 of the prestressed stress detection device, and a spring 2 8 is fixedly connected between the telescopic seat 7 and the top plate 4. Two bases 15 are fixedly installed on the lower side of the main body 1 of the prestressed stress detection device. Two mounting blocks 9 are clamped on one side of the two bases 15. Universal wheels 10 are fixedly arranged on the lower sides of the four mounting blocks 9. The universal wheels 10 can be used to drive the entire prestressed stress detection device so as to flexibly and conveniently move the prestressed stress detection device, and at the same time, the prestressed stress detection of the bridge can be flexibly realized. Four first telescopic plates 11 are slidably connected to the bottom ends of the two bases 15, and two second telescopic plates 13 are slidably connected to the bottom ends of the two bases 15. Through the installation and use of the first telescopic plate 11 and the second telescopic plate 13, the vibration force of the universal wheel 10 can be buffered and consumed by using two groups of telescopic plates, so as to better protect the prestressed stress detection device.

[0038] A first spring 12 distributed in an array is fixedly connected between the first telescopic plate 11 and the base 15, and a second spring 14 distributed in an array is fixedly connected between the first telescopic plate 11 and the base 15. L-shaped seats 16 are fixedly installed at both ends of the prestressed detection device body 1, and two limit plates 17 are fixedly provided on the lower side of the L-shaped seat 16. The limit plate 17 is located inside the L-shaped seat 16, and spring three 18 distributed in an array is fixedly installed between the two L-shaped seats 16 and the limit plate 17.

[0039] Two symmetrically arranged fixed plates 21 are fixedly connected to the upper side of the top plate 4, two smooth rods 22 are fixedly connected to the inner side surfaces of the two fixed plates 21, and two symmetrically arranged U-shaped slides 23 are slidably installed on the outer surfaces of the two smooth rods 22. A U-shaped seat 25 is fixedly installed on the lower side of the top plate 4, and the two U-shaped slides 23 and the interior of the U-shaped seat 25 are connected with a movable rotating plate 26 for rotation together, and four springs 24 are connected in an array between the two U-shaped slides 23 and the fixed plates 21.

[0040] A U-shaped plate 19 is fixedly provided on the upper side of the top plate 4, a gear rod 20 is rotatably installed on the upper side of the U-shaped plate 19, a mounting frame 32 is fixedly provided on the upper side of the gear rod 20, a threaded rod 34 is fixedly installed on one side of the mounting frame 32, an outer surface of the threaded rod 34 is threadedly connected to an L-shaped lifting plate 35, a placement seat 36 is fixedly provided on the front side of the L-shaped lifting plate 35, the ultrasonic detector 2 is located inside the placement seat 36, the upper side of the threaded rod 34 passes through the L-shaped plate 33 and extends to the upper side of the L-shaped plate 33, and the upper side of the threaded rod 34 is fixedly connected to a servo motor 44 through a motor mounting plate.

[0041] A fixing seat 37 is fixedly connected to the right side of the placement seat 36, and a probe 38 is fixedly provided on one side of the ultrasonic detector 2. The probe 38 is located inside the fixing seat 37, and the lower side of the probe 38 passes through the fixing seat 37 and extends to the lower side of the fixing seat 37. A plug plate 39 for fixing the probe 38 is clamped inside the fixing seat 37. Two second limit rods 45 are fixedly installed between the mounting frame 32 and the L-shaped plate 33. The outer surfaces of the two second limit rods 45 are slidably connected to the inside of the L-shaped lifting plate 35. Through the setting of the second limit rods 45, the two second limit rods 45 can be used to guide and limit the moving trajectory of the L-shaped lifting plate 35, so that the L-shaped lifting plate 35 can smoothly drive the ultrasonic detector 2 to move up and down, so that the ultrasonic detector 2 can detect the progress of the bridge.

[0042] The inner side surface of the placement seat 36 is slidably connected to two U-shaped baffles 42 for fixing the ultrasonic detector 2, and a third spring 43 is fixedly installed between the two U-shaped baffles 42 and the placement seat 36. The upper side of the placement seat 36 is rotatably connected to two rotating shafts 40, and the upper sides of the two rotating shafts 40 are fixedly connected to rubber pressure plates 41 for fixing the ultrasonic detector 2.

[0043] A fixed concave plate 46 is fixedly connected to the upper side of the top plate 4, and a T-block 47 is slidably installed inside the fixed concave plate 46. A rack 48 is fixedly installed on the upper side of the T-block 47, and the rack 48 and the gear rotating rod 20 are meshed with each other. Through the installation of the fixed concave plate 46 and the T-block 47, the T-block 47 can be moved and adjusted inside the fixed concave plate 46, so that the rack 48 can move back and forth stably to drive the gear rotating rod 20 to rotate so as to adjust the detection position of the probe 38. A first side plate 49 is fixedly connected to the rear side of the rack 48, and a second side plate 50 is fixedly connected to the upper side of the top plate 4. An electric push rod 51 is fixedly provided between the first side plate 49 and the second side plate 50. The model of the electric push rod 51 is HB-DJ801.

[0044] The L-shaped lifting plate 35 is internally fixedly connected with two vertical rods 52, and a slider 53 is slidably installed on the outer surface of the two vertical rods 52. A protective cover 55 for protecting the ultrasonic detector 2 is fixed on the front side of the slider 53. The protective cover 55 is located above the ultrasonic detector 2. The rear side of the slider 53 is threadedly connected with two fastening bolts 54 for fixing the protective cover 55. The fastening bolts 54 can be used to squeeze and position the slider 53 so that the protective cover 55 can be stored in a high place for convenient use of the ultrasonic detector 2.

[0045] The inner side surfaces of the two bases 15 are rotatably connected with a double-headed screw rod 27, and the outer surface of the double-headed screw rod 27 is threadedly connected with two symmetrically arranged threaded cross plates 29, and two positioning blocks 30 for fixing the mounting block 9 are fixedly provided on one side of the two threaded cross plates 29. The middle part of the outer surface of the double-headed screw rod 27 is fixedly connected with an operating hand wheel 28, and the inner side surfaces of the two bases 15 are fixedly connected with two first limiting rods 31 arranged in parallel, and the outer surfaces of the two first limiting rods 31 are slidably connected to the inside of the threaded cross plates 29. Through the setting of the first limiting rods 31, the two first limiting rods 31 can be used to guide and limit the moving trajectory of the two threaded cross plates 29, so that the two threaded cross plates 29 can be adjusted and moved smoothly, so as to firmly fix the four universal wheels 10.

[0046] The telescopic seat 7 is located above the rubber slide 5, a power distribution cabinet 67 is fixedly provided on the upper side of the top plate 4, an armrest frame 68 is fixedly connected to the rear side of the base 15, a groove 66 is provided on the upper side of the rubber slide 5, the groove 66 is adapted to the telescopic seat 7, and the lower side of the telescopic seat 7 is slidably installed with the upper side of the rubber slide 5 through the groove 66.

[0047] When the present invention is in use, the four mounting blocks 9 with the universal wheels 10 are clamped into the inside of the two bases 15, so that the first telescopic plate 11 with the first spring 12 and the second telescopic plate 13 with the second spring 14 can be used to elastically squeeze the mounting blocks 9, so as to preliminarily fix the universal wheels 10, and then the operating hand wheel 28 is rotated, and the operating hand wheel 28 can drive the double-headed screw rod 27 to rotate, so that the two threaded cross plates 29 on the double-headed screw rod 27 can move relatively, so that the two positioning blocks 30 at the two threaded cross plates 29 can be clamped into the inside of the two bases 15, so as to stably position the mounting blocks 9 at the four universal wheels 10, and then the two movable rotating plates 26 are driven to move downward, so that the two U-shaped slide plates 23 squeeze the spring four 24 on the two smooth rods 22, so that the elastic force of the spring four 24 is utilized. It can buffer the vibration force back and forth, and is used to buffer and protect the prestressed stress detection device. Then, when the main body 1 of the prestressed stress detection device vibrates while walking, the elastic force of the spring three 18 can be used to allow the two limit plates 17 to elastically expand and contract inside the L-shaped seat 16. Then, the spring two 8 installed with the telescopic seat 7 and the rubber slide seat 5 installed with the spring one 6 can be mutually expanded and contracted to buffer, so as to consume the buffered vibration force. Then, the first telescopic plate 11 and the second telescopic plate 13 with elastic force can be used to further elastically buffer the universal wheel 10 for effectively buffering the vibration force. At the same time, the four dampers 3 can be used to consume the vibration energy to reduce the vibration force, so that the vibration amplitude is gradually reduced and the vibration is finally stopped, thereby enhancing the buffering effect of the prestressed stress detection device, avoiding damage to the internal machine components thereof, and prolonging the service life of the prestressed stress detection device.

[0048] By placing the ultrasonic detector 2 into the placement seat 36, the two U-shaped baffles 42 equipped with the third spring 43 can be elastically positioned at the two ends of the ultrasonic detector 2, and then the two rotating shafts 40 can be used to drive the two rubber pressure plates 41 to rotate, so that the two rubber pressure plates 41 are positioned above the ultrasonic detector 2, and then the probe 38 of the ultrasonic detector 2 is placed into the interior of the fixed seat 37, and then the plug plate 39 is clamped into the interior of the fixed seat 37, so that the plug plate 39 can position the plug plate 39, and then the output shaft of the servo motor 44 drives the threaded rotating rod 34 to rotate, so that the L-shaped lifting plate 35 on the threaded rotating rod 34 can drive the probe 38 to move downward so as to fit onto the bridge ground, and then the ultrasonic detector 2 is started, so that the probe 38 of the ultrasonic detector 2 releases ultrasonic waves, and then the ultrasonic detector 2 receives the reflected ultrasonic waves to detect and analyze whether there are gaps inside the bridge, and at the same time, the four universal wheels 10 can drive the entire prestressed detection device to move on the bridge, so as to flexibly detect different positions on the bridge;

[0049] By allowing the electric push rod 51 to extend itself, the electric push rod 51 can drive the rack 48 to move. At this time, the T-block 47 at the rack 48 can move smoothly on the fixed concave plate 46, so that the rack 48 can drive the gear rotating rod 20 to rotate. As the gear rotating rod 20 rotates, the ultrasonic detector 2 can be rotated and adjusted to the right. Conversely, when the electric push rod 51 contracts itself, the ultrasonic detector 2 can be rotated and adjusted to the right, thereby increasing the detection range of the ultrasonic detector 2 without moving the entire prestressed detection device, saving time and effort, and improving the detection efficiency of the prestressed detection device. At the same time, the slider 53 on the two vertical rods 52 is moved, and the slider 53 drives the protective cover 55 to move downward, so that the protective cover 55 can protect above the ultrasonic detector 2, thereby effectively protecting the ultrasonic detector 2 and preventing the ultrasonic detector 2 from being exposed to the outside.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A bridge prestress detection device, comprising a prestress detection device body (1) and an ultrasonic detector (2), characterized in that: Four dampers (3) are fixedly connected to the upper side of the main body (1) of the prestress detection device, and a top plate (4) is fixedly provided on the upper side of the four dampers (3). The upper side of the main body (1) of the prestress detection device is slidably connected to a rubber sliding seat (5) distributed in an array, and the lower side of the top plate (4) is slidably connected to a telescopic seat (7) distributed in an array. A spring 1 (6) is fixedly connected between the rubber sliding seat (5) and the main body (1) of the prestressed stress detection device, a spring 2 (8) is fixedly connected between the telescopic seat (7) and the top plate (4), two bases (15) are fixedly installed on the lower side of the main body (1) of the prestressed stress detection device, two mounting blocks (9) are clamped on one side of the two bases (15), universal wheels (10) are fixedly provided on the lower sides of the four mounting blocks (9), four first telescopic plates (11) are slidably connected to the bottom ends of the two bases (15), and two second telescopic plates (13) are slidably connected to the bottom ends of the two bases (15).

2. A bridge prestress detection device according to claim 1, characterized in that: A first spring (12) distributed in an array is fixedly connected between the first telescopic plate (11) and the base (15); a second spring (14) distributed in an array is fixedly connected between the first telescopic plate (11) and the base (15); both ends of the prestressed detection device body (1) are fixedly mounted with an L-shaped seat (16); two limit plates (17) are fixedly mounted on the lower side of the L-shaped seat (16); the limit plates (17) are located inside the L-shaped seat (16); and a spring three (18) distributed in an array is fixedly mounted between the two L-shaped seats (16) and the limit plates (17).

3. A bridge prestress detection device according to claim 1, characterized in that: The upper side of the top plate (4) is fixedly connected to two symmetrically arranged fixed plates (21), the inner side surfaces of the two fixed plates (21) are fixedly connected to two smooth rods (22), the outer surfaces of the two smooth rods (22) are slidably mounted with two symmetrically arranged U-shaped slide plates (23), the lower side of the top plate (4) is fixedly mounted with a U-shaped seat (25), the two U-shaped slide plates (23) and the interior of the U-shaped seat (25) are both rotatably connected with a movable rotating plate (26), and four springs (24) are connected in an array between the two U-shaped slide plates (23) and the fixed plate (21).

4. A bridge prestress detection device according to claim 1, characterized in that: A U-shaped plate (19) is fixedly provided on the upper side of the top plate (4), a gear rotating rod (20) is rotatably installed on the upper side of the U-shaped plate (19), a mounting frame (32) is fixedly provided on the upper side of the gear rotating rod (20), a threaded rotating rod (34) is fixedly provided on one side of the mounting frame (32), an L-shaped lifting plate (35) is threadedly connected to the outer surface of the threaded rotating rod (34), a placement seat (36) is fixedly provided on the front side of the L-shaped lifting plate (35), the ultrasonic detector (2) is located inside the placement seat (36), the upper side of the threaded rotating rod (34) passes through the L-shaped plate (33) and extends to the upper side of the L-shaped plate (33), and the upper side of the threaded rotating rod (34) is fixedly connected to a servo motor (44) via a motor mounting plate.

5. A bridge prestress detection device according to claim 4, characterized in that: A fixing seat (37) is fixedly connected to the right side of the placement seat (36), a probe (38) is fixedly provided on one side of the ultrasonic detector (2), the probe (38) is located inside the fixing seat (37), the lower side of the probe (38) passes through the fixing seat (37) and extends to the lower side of the fixing seat (37), a plug plate (39) for fixing the probe (38) is clamped inside the fixing seat (37), two second limiting rods (45) are fixedly installed between the mounting frame (32) and the L-shaped plate (33), and the outer surfaces of the two second limiting rods (45) are slidably connected to the inside of the L-shaped lifting plate (35).

6. A bridge prestress detection device according to claim 4, characterized in that: The inner side surface of the placement seat (36) is slidably connected to two U-shaped baffles (42) for fixing the ultrasonic detector (2), and a third spring (43) is fixedly installed between the two U-shaped baffles (42) and the placement seat (36). The upper side of the placement seat (36) is rotatably connected to two rotating shafts (40), and the upper sides of the two rotating shafts (40) are fixedly connected to rubber pressure plates (41) for fixing the ultrasonic detector (2).

7. A bridge prestress detection device according to claim 1, characterized in that: The upper side of the top plate (4) is fixedly connected to a fixed concave plate (46), a T-shaped block (47) is slidably mounted inside the fixed concave plate (46), a rack (48) is fixedly mounted on the upper side of the T-shaped block (47), the rack (48) and the gear rotating rod (20) are meshed with each other, a first side plate (49) is fixedly connected to the rear side of the rack (48), a second side plate (50) is fixedly connected to the upper side of the top plate (4), and an electric push rod (51) is fixedly mounted between the first side plate (49) and the second side plate (50).

8. A bridge prestress detection device according to claim 4, characterized in that: Two vertical rods (52) are fixedly connected inside the L-shaped lifting plate (35), and sliders (53) are slidably mounted on the outer surfaces of the two vertical rods (52). A protective cover (55) for protecting the ultrasonic detector (2) is fixedly provided on the front side of the slider (53), and the protective cover (55) is located above the ultrasonic detector (2). The rear side of the slider (53) is threadedly connected with two fastening bolts (54) for fixing the protective cover (55).

9. A bridge prestress detection device according to claim 1, characterized in that: The inner side surfaces of the two bases (15) are rotatably connected with a double-headed screw rod (27), the outer surface of the double-headed screw rod (27) is threadedly connected with two symmetrically arranged threaded cross plates (29), one side of the two threaded cross plates (29) is fixedly provided with two positioning blocks (30) for fixing the mounting block (9), the middle part of the outer surface of the double-headed screw rod (27) is fixedly connected with an operating hand wheel (28), the inner side surfaces of the two bases (15) are fixedly connected with two first limiting rods (31) arranged in parallel, and the outer surfaces of the two first limiting rods (31) are slidably connected to the inside of the threaded cross plates (29).

10. A bridge prestress detection device according to claim 1, characterized in that: The telescopic seat (7) is located above the rubber slide seat (5), a power distribution cabinet (67) is fixedly provided on the upper side of the top plate (4), a handrail frame (68) is fixedly connected to the rear side of the base (15), a groove (66) is provided on the upper side of the rubber slide seat (5), the groove (66) is adapted to the telescopic seat (7), and the lower side of the telescopic seat (7) is slidably mounted on the upper side of the rubber slide seat (5) through the groove (66).

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