Bridge engineering nondestructive detector and detection method

Abstract

The invention relates to the field of bridge detection equipment, in particular to a bridge engineering nondestructive detector and a detection method.The bridge engineering nondestructive detector comprises a handle rod, and the upper end of the handle rod is rotationally provided with a connecting frame through a hinged support; sliding frames are slidably mounted on the inner sides of the two guide rail beams, and a mounting seat is slidably mounted between the two sliding frames; the number of the transmission rotary tables is two, a second synchronous belt is arranged between the two transmission rotary tables in a transmission mode, and a transmission pin is fixed to the outer side face of the second synchronous belt. The device has the beneficial effects that the two parallel guide rail beams are fixed between the two roller carriers, the mounting base driven by the second synchronous belt to slide in a reciprocating mode is mounted between the two guide rail beams, and when a worker pushes the device to move up and down through the handle rod, the mounting base can slide in a reciprocating mode in the horizontal direction; on one hand, the detection area of the bridge surface is enlarged, on the other hand, the detection difficulty is reduced, and it is guaranteed that the detection process is convenient and labor-saving.

Description

Technical Field

[0001] The invention relates to the field of bridge detection equipment, in particular to a nondestructive detection instrument and a detection method for bridge engineering. Background Art

[0002] In modern road and bridge engineering, ultrasonic nondestructive testing technology, as a non-destructive testing method, has attracted much attention due to its high efficiency and high precision. Its working principle is to use the difference in acoustic properties of materials and their defects to reflect the ultrasonic propagation waveform and the energy change of penetration time to detect internal defects of materials.

[0003] In the prior art, a Chinese utility model with publication number CN216304424U discloses a non-destructive ultrasonic detection device for bridges. By changing the curvature of the detection rail, the curvature of the detection rail and the bridge deck can be ensured to be consistent during measurement, thereby improving the accuracy of detection.

[0004] At present, ultrasonic flaw detection requires workers to hold an ultrasonic probe and stick it to the bridge surface. In order to detect different positions on the side of the bridge, workers usually need to constantly change their positions. For higher positions, the flaw detection process is inconvenient and extremely laborious. To this end, the present invention proposes a bridge engineering non-destructive testing instrument and detection method to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a nondestructive testing instrument and testing method for bridge engineering, so as to solve the problem of inconvenience in the testing process at a higher position on the side of the bridge proposed in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a nondestructive testing instrument for bridge engineering, comprising: A handlebar, wherein a connecting frame is rotatably mounted on the upper end of the handlebar through a hinge support, and both ends of the connecting frame are fixedly connected to a roller frame, and a synchronous belt 1 is arranged on one side of the roller frame; Two mutually parallel guide rail beams are fixedly connected between the two roller frames, and sliding frames are slidably installed on the inner sides of the two guide rail beams. A mounting seat is slidably installed between the two sliding frames, and an ultrasonic probe is installed inside the mounting seat. The two sliding frames are fixedly connected to the connection frame above them, and a limited sliding groove is provided at the edge of the lower surface of the sliding frame; A transmission turntable is rotatably installed between the ends of the two guide rail beams. Two transmission turntables are provided, and a synchronous belt 2 is provided between the two transmission turntables. A transmission pin is fixed on the outer side of the synchronous belt 2, and the transmission pin is movably inserted into the inner cavity of the limiting slide groove from bottom to top. An annular gear ring is fixed on the lower surface of the transmission turntable, and the annular gear ring is meshed with the synchronous belt 1.

[0007] Preferably, the roller frame is perpendicular to the guide rail beam. Rolling wheels are rotatably installed at both ends of the roller frame. An annular groove is formed in the middle of each rolling wheel. Both ends of the first synchronous belt are respectively clamped in the inner cavities of the two annular grooves in a semi-covered form.

[0008] Preferably, a turntable frame is fixed between the corresponding ends of the two guide rail beams. The rotating shaft of the driving turntable is rotatably connected to the turntable frame through a bearing. A fastening frame is fixed to the lower surface of the turntable frame. The fastening frame is in a "C" shape with an upward opening and is buckled outside the meshing connection of the first synchronous belt and the annular gear ring.

[0009] Preferably, friction lines are arranged on the inner side surface of the first synchronous belt. Teeth are arranged on both the outer side surface of the first synchronous belt and the inner side surface of the second synchronous belt. An annular tooth groove is formed on the side surface of the driving turntable, and the annular tooth groove meshes with the teeth on the inner side of the second synchronous belt. A connecting convex plate is fixed to the other side surface of the roller frame, and the connecting convex plate is fixedly connected to the guide rail beam through bolts.

[0010] Preferably, storage grooves are formed on the outer side surfaces of the two guide rail beams away from each other. The middle part of the second synchronous belt is located in the inner cavity of the storage groove and has a gap with the groove bottom. The transmission pin is located outside the opening end of the storage groove. Both the connecting frame and the limiting sliding groove are in a "square" shape.

[0011] Preferably, convex platforms are fixed to the inner walls of the middle parts of both sides of the connecting frame, and the convex platforms are fixedly connected to the sliding frame through bolts. The sliding frame is in an inverted "F" shape, and rolling shafts are arranged at the joint where the sliding frame fits with the guide rail beam. A fitting plate is fixed to the lower end of the mounting seat. The fitting plate is in an arc-shaped structure with an upward convex middle part. Rolling parts are movably embedded on the lower surface of the fitting plate.

[0012] Preferably, sliding rotating shafts are fixed to both side surfaces of the mounting seat. Long strip-shaped guide sliding grooves are formed on the side surfaces of the two symmetrically distributed and mutually close sliding frames. The sliding rotating shafts are movably inserted into the inner cavities of the guide sliding grooves.

[0013] Preferably, a flexible sheath is fixedly connected to the lower surface of the sliding frame. Ear plates corresponding to the flexible sheath are fixed to both sides of the upper surface of the fitting plate. A thrust spring is arranged in the inner cavity of the flexible sheath, and the upper and lower ends of the thrust spring are respectively fixed to the sliding frame and the fitting plate.

[0014] Preferably, the mounting seat is of a hollow structure. A sliding ring is slidably installed in the inner cavity of the mounting seat. The ultrasonic probe is fixedly connected to the sliding ring. The lower end of the ultrasonic probe sequentially penetrates through the mounting seat and the fitting plate and extends to the outside of the fitting plate. A sealing cover is fixed at the upper end opening of the mounting seat. A compression spring is arranged between the sealing cover and the sliding ring.

[0015] A detection method according to the above-mentioned bridge engineering nondestructive testing instrument specifically comprises the following steps: Step 1: The staff lifts the device by the handle bar. The device is kept vertical and close to the side of the bridge under the action of gravity. By applying thrust to the handle bar, the device is pressed against the bridge surface on the one hand, and pushed upward in the vertical direction on the other hand; Step 2, when the device moves up, the rolling wheel rolls on the side of the bridge and drives the synchronous belt 1 to transmit. The synchronous belt 1 drives the transmission turntable to rotate by meshing with the annular gear ring, and then drives the synchronous belt 2 to transmit. At this time, the transmission pin slides in the inner cavity of the limiting slide groove. When the transmission pin slides to the end position of the limiting slide groove, the connecting frame is pushed by the transmission pin and drives the connecting frame and the sliding frame to move horizontally, thereby driving the rear mounting seat, the bonding plate and the ultrasonic probe to move horizontally, and when the transmission pin bypasses the transmission turntable and moves in the reverse direction, it drives the mounting seat, the bonding plate and the ultrasonic probe to slide horizontally in the reverse direction. Therefore, the moving path of the ultrasonic probe of this device is a vertical wave shape; Step 3. When the mounting base and the ultrasonic probe move from the middle of the guide beam to the end of the guide beam, since part of the side of the bridge is a curved structure, and the thrust spring pushes the bonding plate to always be close to the side of the bridge, the mounting base can adaptively slide and rotate between the two sliding frames, thereby ensuring that the ultrasonic probe always remains perpendicular to the side of the bridge, thereby improving the measurement accuracy.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention fixes two parallel guide beams between two roller frames, and a mounting seat driven by a synchronous belt to slide back and forth is installed between the two guide beams. Both sides of the mounting seat are movably connected with sliding frames, and an ultrasonic probe is installed in the inner cavity of the mounting seat. The mounting seat can rotate between the two sliding frames and change its own angle to ensure that the ultrasonic probe is always perpendicular to the bridge surface. When the staff pushes the device up and down by using a handle bar, the mounting seat can slide back and forth in the horizontal direction, thereby continuously changing the flaw detection position of the ultrasonic probe. On the one hand, the detection area of ​​the bridge surface is increased, and on the other hand, the detection difficulty is reduced, ensuring that the detection process is convenient and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 A-direction schematic diagram of the overall structure; Figure 3 It is a schematic diagram of the structural connection between the connecting frame and the roller frame of the present invention; Figure 4 It is an exploded schematic diagram of the roller frame and guide rail beam structure of the present invention; Figure 5 It is a schematic diagram of the meshing of the synchronous belt 1 and the annular gear ring structure of the present invention; Figure 6 It is an exploded schematic diagram of the connection frame and guide rail beam structure of the present invention; Figure 7 This is a schematic diagram of the connection between the connecting frame and the sliding frame structure of the present invention; Figure 8 It is an exploded schematic diagram of the mounting seat and the sliding frame structure of the present invention; Fig. 9 It is a three-dimensional schematic diagram of the mounting seat and the bonding plate structure of the present invention.

[0018] In the figure: 1. handle bar; 2. connecting frame; 3. roller frame; 31. rolling wheel; 32. annular groove; 33. synchronous belt one; 34. connecting convex plate; 4. guide rail beam; 41. storage groove; 42. turntable frame; 43. snap-fit ​​frame; 5. transmission turntable; 51. annular tooth groove; 52. annular gear ring; 53. synchronous belt two; 531. transmission pin; 6. mounting seat; 61. sliding ring; 62. sealing cover; 63. compression spring; 64. sliding shaft; 7. sliding frame; 71. connecting frame; 72. limiting slide groove; 73. rolling shaft; 74. flexible sheath; 75. thrust spring; 76. guide slide groove; 8. bonding plate; 81. rolling element; 9. ultrasonic probe. DETAILED DESCRIPTION

[0019] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit 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.

[0020] See also Figures 1 to 9 , the present invention provides a technical solution: Embodiment 1, a nondestructive testing instrument for bridge engineering, comprises: a handle bar 1 and a transmission turntable 5.

[0021] Specifically, a connecting frame 2 is rotatably mounted on the upper end of the handle bar 1 through a hinge support, the connecting position of the handle bar 1 and the connecting frame 2 is located in the middle of the connecting frame 2, both ends of the connecting frame 2 are fixedly connected to a roller frame 3, and a synchronous belt 33 is provided on one side of the roller frame 3; Secondly, two parallel guide rail beams 4 are fixedly connected between the two roller frames 3. The guide rail beams 4 are used to fix the two roller frames 3 together. Figure 3 and Figure 4As shown, the position of the connecting frame 2 is closer to the upper end of the roller frame 3. Therefore, when the staff lifts the device by means of the handle bar 1, the roller frame 3 can remain vertically placed under the action of gravity, so that it can be more convenient to fit the side of the bridge. Sliding frames 7 are slidably installed on the inner sides of the two guide beams 4. The sliding frames 7 can only slide horizontally along the length direction of the guide beams 4. A mounting seat 6 is slidably installed between the two sliding frames 7, and an ultrasonic probe 9 is installed inside the mounting seat 6. The mounting seat 6 can slide in a direction close to or away from the side of the bridge. At the same time, the mounting seat 6 can also rotate at a certain angle between the two sliding frames 7, thereby ensuring that the ultrasonic probe 9 can always fit the side of the bridge and remain perpendicular to the side of the bridge. This is a good design. The difference is that: due to the different applicable scenarios of ultrasonic oblique probes and straight probes, the shapes and incident angles of the probes are different, and the corresponding detected objects are also different. Among them, the oblique probe is mainly used to detect the stress area on the surface of the object to be tested, such as pipes and welds, while the straight probe is mainly used to detect the defects inside the object to be tested. When performing ultrasonic flaw detection on the internal defects of the bridge, the use of a straight probe is more in line with the needs. The ultrasonic probe 9 of the device uses a straight probe. When in use, it cooperates with the rotation of the mounting seat 6 to ensure that the ultrasonic probe 9 is perpendicular to the surface of the position to be tested, thereby improving the detection accuracy; in addition, the two sliding frames 7 are fixedly connected to the connecting frame 71 above them, so the relative positions of the two sliding frames 7 are always kept fixed, and a limited position slide groove 72 is provided at the edge of the lower surface of the sliding frame 7; Further, the transmission turntable 5 is rotatably installed between the ends of the two guide rail beams 4, and two transmission turntables 5 are provided, and a synchronous belt 53 is provided between the two transmission turntables 5. Figure 4 As shown, the synchronous belt 2 53 can maintain transmission with the rotation of the transmission turntable 5, and a transmission pin 531 is fixed on the outer side of the synchronous belt 2 53, and the transmission pin 531 is movably inserted into the inner cavity of the limiting slide groove 72 from bottom to top, combined with Figure 6 and Figure 7 As shown, during the transmission of the synchronous belt 53, the transmission pin 531 moves accordingly and slides in the inner cavity of the limiting slide groove 72. The transmission pin 531 can push the connecting frame 71 to slide along the length direction of the guide rail beam 4 by squeezing the inner wall of the limiting slide groove 72, and because the entire moving path of the transmission pin 531 is a structure similar to an ellipse, the connecting frame 71 will slide horizontally back and forth along the length direction of the guide rail beam 4. After the staff lifts the device through the handle bar 1 and fits it to the side of the bridge, the device is pushed up in the vertical direction, and the horizontal reciprocating sliding of the connecting frame 71 can drive the ultrasonic probe 9 to move in a wave shape. The moving path of the ultrasonic probe 9 can be shown as follows Figure 1As shown in the figure, the detection area of the ultrasonic probe 9 on the bridge surface can be increased, ensuring that the device is more convenient and labor-saving to use, without the need for staff to frequently manually change the position of the ultrasonic probe 9. In addition, an annular gear 52 is fixed on the lower surface of the transmission turntable 5, and the annular gear 52 meshes with the first synchronous belt 33, as Figure 4 shown. When the first synchronous belt 33 is driving, it can drive the transmission turntable 5 to rotate synchronously, and then drive the second synchronous belt 53 to drive.

[0022] In order to drive the transmission turntable 5 to rotate, the roller frame 3 of the present application is perpendicular to the guide rail beam 4. Rolling wheels 31 are rotatably installed at both ends of the roller frame 3. Therefore, when the staff vertically pushes the device upward, the rolling wheels 31 can roll on the side of the bridge. An annular groove 32 is provided in the middle of the rolling wheels 31, and both ends of the first synchronous belt 33 are respectively clamped in the inner cavity of the two annular grooves 32 in a semi-covered form, as Figure 3 shown. When the rolling wheels 31 roll, they can drive the first synchronous belt 33 to drive. In addition, in order to prevent slipping between the first synchronous belt 33 and the rolling wheels 31, friction lines are provided on the inner side of the first synchronous belt 33. Combining the above description, when the device vertically moves on the side of the bridge, the rolling wheels 31 roll and drive the first synchronous belt 33 to drive. At this time, the first synchronous belt 33 drives the transmission turntable 5 to rotate through meshing with the annular gear 52, and then realizes the reciprocating sliding of the ultrasonic probe 9 in the horizontal direction. Therefore, the ultrasonic probe 9 of the device can reciprocate horizontally while moving upward, thus forming a Figure 1 vertical wavy path as shown in the figure. The movement of the ultrasonic probe 9 does not require an additional power source to drive, which can reduce the equipment cost and the overall weight of the device, thus ensuring that the staff can push the device up and down more easily.

[0023] In order to prevent the first synchronous belt 33 from disengaging from the annular gear 52, the present application also has a turntable frame 42 fixed between the ends of the two guide rail beams 4 at corresponding positions. The rotating shaft of the transmission turntable 5 is rotatably connected to the turntable frame 42 through a bearing, as Figure 4 shown. The turntable frame 42 is used to install and position the transmission turntable 5. A fastening frame 43 is fixed on the lower surface of the turntable frame 42. The fastening frame 43 is in a "C" shape with an upward opening and is buckled on the outside of the meshing connection of the first synchronous belt 33 and the annular gear 52. The setting of the fastening frame 43 buckles the middle position of the first synchronous belt 33 and the annular gear 52 together, ensuring that when the first synchronous belt 33 is driving, it can always drive the transmission turntable 5 to rotate synchronously, thus preventing the first synchronous belt 33 from disengaging from the annular gear 52 due to its flexible structure.

[0024] In order to prevent the synchronous belt 1 33 and the synchronous belt 2 53 from slipping, the present application also has teeth on the outer side of the synchronous belt 1 33 and the inner side of the synchronous belt 2 53, and an annular tooth groove 51 is opened on the side of the transmission turntable 5, and the annular tooth groove 51 and the teeth on the inner side of the synchronous belt 2 53 are meshed with each other. Figure 4 As shown, the transmission turntable 5 and the synchronous belt 2 53 are prevented from slipping by the mutual engagement between the annular tooth groove 51 and the teeth. A connecting protrusion 34 is fixed on the other side of the roller frame 3, and the connecting protrusion 34 is fixedly connected to the guide rail beam 4 by bolts. The setting of the connecting protrusion 34 allows the end of the guide rail beam 4 to maintain a fixed connection with the roller frame 3.

[0025] In order to position the synchronous belt 2 53, the present application also has a receiving groove 41 on the side of the two guide rail beams 4 that are away from each other. The middle part of the synchronous belt 2 53 is located in the inner cavity of the receiving groove 41 and has a gap with the bottom of the groove. The setting of the receiving groove 41 is used to avoid the teeth on the inner side of the synchronous belt 2 53 and the guide rail beam 4 from contacting each other, which may hinder the transmission of the synchronous belt 2 53. At the same time, the receiving groove 41 can also position the synchronous belt 2 53 to avoid mutual misalignment between the synchronous belt 2 53 and the transmission turntable 5. The transmission pin 531 is located outside the open end of the receiving groove 41, thereby avoiding contact with the guide rail beam 4. When the transmission pin 531 is located in the area where the limiting slide groove 72 and the guide rail beam 4 are parallel to each other, the transmission pin 531 will slide in the inner cavity of the limiting slide groove 72 and will not squeeze the inner wall of the limiting slide groove 72. When the transmission pin 531 is located in the area where the limiting slide groove 72 and the guide rail beam 4 are perpendicular to each other, the transmission pin 531 will squeeze the inner wall of the limiting slide groove 72, thereby pushing the connection frame 71 to move. Therefore, when the transmission pin 531 moves to the position at the end of the synchronous belt 53, the transmission pin 531 can achieve reversal and drive the connection frame 71 to slide in the opposite direction.

[0026] In order to ensure that the ultrasonic probe 9 is always perpendicular to the side of the bridge, the present application also has bosses fixed on the inner walls of the middle of both sides of the connecting frame 71, and the bosses are fixedly connected to the sliding frame 7 by bolts, such as Figure 6 and Figure 7 As shown, the sliding frame 7 and the connecting frame 71 remain relatively fixed, the sliding frame 7 is in an inverted "F" shape, and a rolling shaft 73 is provided at the fitting connection between the sliding frame 7 and the guide rail beam 4. The sliding frame 7 and the guide rail beam 4 are slidably engaged to ensure that the two can only slide relative to each other and will not separate from each other. The setting of the rolling shaft 73 is used to reduce the friction generated between the sliding frame 7 and the guide rail beam 4 when sliding. A fitting plate 8 is fixed at the lower end of the mounting seat 6. The fitting plate 8 is in an arc-shaped structure with a convex middle part. A rolling member 81 is movably embedded on the lower surface of the fitting plate 8. The setting of the fitting plate 8 is used to achieve fitting with the side of the arc-shaped bridge, thereby ensuring that the ultrasonic probe 9 can always be perpendicular to its contact position with the side of the bridge.

[0027] In order to flexibly connect the mounting seat 6 with the sliding frame 7, the present application also has sliding shafts 64 fixed on both sides of the mounting seat 6, and the two sliding frames 7 are symmetrically distributed and have long guide grooves 76 on one side close to each other, and the sliding shafts 64 are movably inserted into the inner cavity of the guide grooves 76, such as Figure 8 As shown, the sliding shaft 64 can slide in the inner cavity of the guide slot 76 along the length direction of the guide slot 76, and the sliding shaft 64 itself can rotate. Figure 2 As shown, the side of the bridge is a curved surface. When the bonding plate 8 moves between the two roller frames 3 (along the length direction of the connecting frame 2), the mounting seat 6 can ensure that the bonding plate 8 always keeps in contact with the side of the bridge through movement and rotation.

[0028] In order to automatically adjust the orientation of the ultrasonic probe 9, the present application also has a flexible sheath 74 fixedly connected to the lower surface of the sliding frame 7, and ear plates corresponding to the flexible sheath 74 are fixed on both sides of the upper surface of the bonding plate 8. The inner cavity of the flexible sheath 74 is provided with a thrust spring 75, and the upper and lower ends of the thrust spring 75 are respectively fixed to the sliding frame 7 and the bonding plate 8. Figure 7 and Figure 8 As shown, the thrust spring 75 applies thrust to the bonding plate 8, so that the bonding plate 8 always tends to move away from the sliding frame 7. When the device is in use, the bonding plate 8 can be automatically bonded to the side of the bridge due to the compression of the thrust spring 75, thereby driving the mounting seat 6 to passively rotate, thereby changing the direction of the ultrasonic probe 9 and ensuring that the ultrasonic wave emitted by the ultrasonic probe 9 can vertically enter the interior of the bridge.

[0029] In order to ensure that the end of the ultrasonic probe 9 always rests against the side of the bridge, the present application also has a hollow structure in the mounting seat 6, a sliding ring 61 is slidably installed in the inner cavity of the mounting seat 6, the ultrasonic probe 9 is fixedly connected to the sliding ring 61, the lower end of the ultrasonic probe 9 passes through the mounting seat 6 and the bonding plate 8 in sequence and extends to the outside of the bonding plate 8, a cover 62 is fixed to the upper end opening of the mounting seat 6, and a compression spring 63 is arranged between the cover 62 and the sliding ring 61, such as Figure 8 and Fig. 9 As shown, the ultrasonic probe 9 can slide a certain distance in the inner cavity of the mounting base 6. If the curvature of the bonding plate 8 is different from the curvature of the side of the bridge, a certain distance will be generated between the middle of the inner wall of the bonding plate 8 and the side of the bridge. At this time, the ultrasonic probe 9 can be slightly extended under the elastic force of the compression spring 63, thereby pressing against the side of the bridge to ensure the normal use of the ultrasonic probe 9.

[0030] The present invention also discloses a detection method according to the above-mentioned bridge engineering nondestructive testing instrument, which specifically comprises the following steps: Step 1: The staff lifts the device by the handle bar 1. The device is kept vertical and close to the side of the bridge under the action of gravity. By applying a thrust to the handle bar 1, the device is pressed against the bridge surface on the one hand, and the device is pushed upward in the vertical direction on the other hand; Step 2, when the device moves up, the rolling wheel 31 rolls on the side of the bridge and drives the synchronous belt 1 33 to transmit. The synchronous belt 1 33 drives the transmission turntable 5 to rotate by meshing with the annular gear ring 52, and then drives the synchronous belt 2 53 to transmit. At this time, the transmission pin 531 slides in the inner cavity of the limiting slide groove 72. When the transmission pin 531 slides to the end position of the limiting slide groove 72, the connecting frame 71 is pushed by the transmission pin 531 and drives the connecting frame 71 and the sliding frame 7 to move horizontally, thereby driving the rear mounting seat 6, the bonding plate 8 and the ultrasonic probe 9 to move horizontally, and when the transmission pin 531 bypasses the transmission turntable 5 and moves in the reverse direction, it drives the mounting seat 6, the bonding plate 8 and the ultrasonic probe 9 to slide horizontally in the reverse direction. Therefore, the moving path of the ultrasonic probe 9 of this device is a vertical wave shape; Step three, when the mounting seat 6 and the ultrasonic probe 9 move from the middle of the guide beam 4 to the end position of the guide beam 4, since part of the side surface of the bridge is a curved structure, but the thrust spring 75 pushes the bonding plate 8 to always be close to the side surface of the bridge, the mounting seat 6 can adaptively slide and rotate between the two sliding frames 7, thereby ensuring that the ultrasonic probe 9 always remains perpendicular to the side surface of the bridge, thereby improving the measurement accuracy.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nondestructive testing instrument for bridge engineering, characterized by: Including: A handle rod (1), the upper end of the handle rod (1) is rotatably installed with a connecting frame (2) through a hinge support, both ends of the connecting frame (2) are fixedly connected with roller frames (3), and a first synchronous belt (33) is arranged on one side of the roller frame (3); Two mutually parallel guide beam (4) are fixedly connected between the two roller frames (3), sliding frames (7) are slidably installed on the inner sides of the two guide beams (4), a mounting seat (6) is slidably installed between the two sliding frames (7), and an ultrasonic probe (9) is installed inside the mounting seat (6). Both sliding frames (7) are fixedly connected with a connecting frame (71) above them. A limiting chute (72) is opened at the edge of the lower surface of the sliding frame (7); A transmission turntable (5), the transmission turntable (5) is rotatably installed between the ends of the two guide beams (4). There are two transmission turntables (5), and a second synchronous belt (53) is transmission - arranged between the two transmission turntables (5). A transmission pin (531) is fixed on the outer side of the second synchronous belt (53), and the transmission pin (531) is movably inserted into the inner cavity of the limiting chute (72) from bottom to top. A ring gear (52) is fixed on the lower surface of the transmission turntable (5), and the ring gear (52) meshes with the first synchronous belt (33).

2. A bridge engineering nondestructive testing instrument according to claim 1, characterized in that: The roller frame (3) is perpendicular to the guide beam (4). Rolling wheels (31) are rotatably installed at both ends of the roller frame (3). An annular groove (32) is opened in the middle of the rolling wheel (31). Both ends of the first synchronous belt (33) are respectively stuck in the inner cavities of the two annular grooves (32) in a semi - wrapped form.

3. A bridge engineering nondestructive testing instrument according to claim 2, characterized in that: A turntable frame (42) is fixed between the corresponding ends of the two guide beams (4). The rotating shaft of the transmission turntable (5) is rotatably connected with the turntable frame (42) through a bearing. A fastening frame (43) is fixed on the lower surface of the turntable frame (42). The fastening frame (43) is in a "C" shape with an upward opening and is buckled outside the meshing connection of the first synchronous belt (33) and the ring gear (52).

4. A bridge engineering nondestructive testing instrument according to claim 3, characterized in that: Friction lines are arranged on the inner side of the first synchronous belt (33). Teeth are arranged on the outer side of the first synchronous belt (33) and the inner side of the second synchronous belt (53). An annular tooth groove (51) is opened on the side surface of the transmission turntable (5), and the annular tooth groove (51) meshes with the teeth on the inner side of the second synchronous belt (53). A connecting convex plate (34) is fixed on the other side surface of the roller frame (3), and the connecting convex plate (34) is fixedly connected with the guide beam (4) through bolts.

5. A bridge engineering nondestructive testing instrument according to claim 4, characterized in that: Receiving grooves (41) are opened on the outer sides of the two mutually - distant guide beams (4). The middle part of the second synchronous belt (53) is located in the inner cavity of the receiving groove (41) and has a gap with the groove bottom. The transmission pin (531) is located outside the opening end of the receiving groove (41). Both the connecting frame (71) and the limiting chute (72) are in a "square" shape.

6. A bridge engineering nondestructive testing instrument according to claim 5, characterized in that: Bosses are fixed to the inner walls of the middle parts of both sides of the connection frame (71), and the bosses are fixedly connected to the sliding frame (7) by bolts. The sliding frame (7) is in an inverted "F" shape, and a rolling shaft (73) is provided at the joint between the sliding frame (7) and the guide rail beam (4). A bonding plate (8) is fixed to the lower end of the mounting seat (6), and the bonding plate (8) is in an arc-shaped structure with a convex middle part, and a rolling member (81) is movably embedded on the lower surface of the bonding plate (8).

7. A bridge engineering nondestructive testing instrument according to claim 6, characterized in that: Sliding shafts (64) are fixed to both side surfaces of the mounting seat (6), and long strip-shaped guide grooves (76) are provided on the side surfaces of the two sliding frames (7) that are symmetrically distributed and close to each other, and the sliding shafts (64) are movably inserted into the inner cavities of the guide grooves (76).

8. A bridge engineering nondestructive testing instrument according to claim 7, characterized in that: The lower surface of the sliding frame (7) is fixedly connected to a flexible sheath (74), and ear plates corresponding to the flexible sheath (74) are fixed to both sides of the upper surface of the bonding plate (8). The inner cavity of the flexible sheath (74) is provided with a thrust spring (75), and the upper and lower ends of the thrust spring (75) respectively fix the sliding frame (7) and the bonding plate (8).

9. A bridge engineering nondestructive testing instrument according to claim 8, characterized in that: The mounting seat (6) is a hollow structure, a sliding ring (61) is slidably mounted in the inner cavity of the mounting seat (6), the ultrasonic probe (9) is fixedly connected to the sliding ring (61), the lower end of the ultrasonic probe (9) passes through the mounting seat (6) and the bonding plate (8) in sequence and extends to the outside of the bonding plate (8), a sealing cover (62) is fixed at the upper end opening of the mounting seat (6), and a compression spring (63) is provided between the sealing cover (62) and the sliding ring (61).

10. A detection method of the bridge engineering nondestructive testing instrument according to claim 9, characterized in that: The specific steps include: Step 1: The staff lifts the device by means of the handle bar (1). The device is kept vertically and in contact with the side of the bridge under the action of gravity. By applying a thrust to the handle bar (1), the device is pressed against the surface of the bridge on the one hand, and the device is pushed upward in the vertical direction on the other hand; Step 2: When the device moves upward, the rolling wheel (31) rolls on the side of the bridge and drives the synchronous belt 1 (33) to transmit. The synchronous belt 1 (33) drives the transmission turntable (5) to rotate by meshing with the annular gear ring (52), thereby driving the synchronous belt 2 (53) to transmit. At this time, the transmission pin (531) slides in the inner cavity of the limiting slide groove (72). When the transmission pin (531) slides to the end position of the limiting slide groove (72), the connecting frame (71) is pushed by the transmission pin (531) and drives the connecting frame (71) and the sliding frame (7) to move horizontally, thereby driving the rear mounting seat (6), the bonding plate (8) and the ultrasonic probe (9) to move horizontally. When the transmission pin (531) bypasses the transmission turntable (5) and moves in the reverse direction, it drives the mounting seat (6), the bonding plate (8) and the ultrasonic probe (9) to slide horizontally in the reverse direction. Therefore, the moving path of the ultrasonic probe (9) of the device is a vertical wave shape. Step 3. When the mounting seat (6) and the ultrasonic probe (9) move from the middle of the guide beam (4) to the end of the guide beam (4), since the side of the bridge is partially curved, the thrust spring (75) pushes the bonding plate (8) to always be close to the side of the bridge. Therefore, the mounting seat (6) can slide and rotate adaptively between the two sliding frames (7), thereby ensuring that the ultrasonic probe (9) always remains perpendicular to the side of the bridge, thereby improving the measurement accuracy.

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