A bridge anti-seepage detection device in bridge engineering

Abstract

The present invention discloses a bridge anti-seepage detection device in bridge engineering, which relates to the technical field of bridge engineering. It includes a main body, on the top of which an arched frame is installed. A main shaft is rotatably installed on the arched frame. An expansion part is correspondingly installed on the outer wall of the main shaft. A fixing rod is fixedly installed on one side of the expansion part by welding. A plurality of fitting pieces are movably arranged on the outer wall of the fixing rod. A water-absorbing resin is installed on the top of the fitting piece. A plurality of liquid sensors are linearly arranged and installed on the top of the main body. The surface contour of the liquid sensor is adapted to the outer contour of the fitting piece. A dryer is installed on one side of the top of the main body. A impurity removal seat is installed on the other side of the top of the main body. Bearing sleeves are linearly arranged and installed on the outer wall of the fixing rod. A plurality of elastic parts are installed in a circumferential manner on the inner wall of the fitting piece. The present invention has the characteristics of accurate detection.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and particularly to a bridge anti-seepage detection device in bridge engineering. Background Art

[0002] Due to the frequent intense impact of wheel loads and long-term exposure without protection in the natural environment, the expansion joints of bridges will crack and the water stop belts will be damaged. Rain and snow water, surface water, etc. will penetrate into the interior of the bridge structure through the damaged expansion joints, corroding the reinforced concrete and affecting the quality safety and service life of the bridge.

[0003] During the use of bridges, settlement or deformation may occur, especially in the case of uneven foundations or poor foundation soil conditions. Such settlement and deformation will affect the geometry of the expansion joints, resulting in an uneven bottom surface at the bottom. Existing instruments for detecting the water seepage position can only detect in a planar form and lack the precise detection function for the leakage position. Therefore, it is necessary to design a bridge anti-seepage detection device in bridge engineering with precise detection. Summary of the Invention

[0004] The purpose of the present invention is to provide a bridge anti-seepage detection device in bridge engineering to solve the problems raised in the above background art.

[0005] To solve the above technical problems, the present invention provides the following technical solution: A bridge anti-seepage detection device in bridge engineering, including a main body. An arch frame is installed on the top of the main body. A main shaft is rotatably installed on the arch frame. An expansion part is correspondingly installed on the outer wall of the main shaft. A fixing rod is fixedly installed on one side of the expansion part by welding. A plurality of fitting pieces are movably arranged on the outer wall of the fixing rod. A water-absorbing resin is installed on the top of the fitting pieces. A plurality of liquid sensors are linearly arranged on the top of the main body. The surface profile of the liquid sensor is adapted to the outer profile of the fitting piece. A motor is installed on one side of the arch frame. The output end of the motor is connected to the main shaft. When it is necessary to judge the water seepage at the bottom of the bridge expansion joint, place the main body at the middle position at the bottom of the bridge expansion joint, so that the motor drives the main shaft to rotate, driving the fitting pieces to move to the bottom of the bridge expansion joint. The water-absorbing resin on its top fits the bottom contour. Since the bottom contour is uneven, the plurality of movably arranged fitting pieces can fit more closely to the bottom of the bridge expansion joint, enabling the water-absorbing resin to contact the seepage gap. When the water-absorbing resin encounters a seepage crack, it will absorb water. When it rotates to the liquid sensor directly below, it can detect the liquid content, thereby judging whether there is water seepage at the current position.

[0006] According to the above technical solution, a dryer is installed on one side of the top of the main body, and a impurity removal seat is installed on the other side of the top of the main body. When the main shaft drives the bonding sheet to rotate to a position flush with the dryer, the water-absorbing resin on the bonding sheet is dried by the dryer to facilitate detecting whether the next position is water-permeable. When the main shaft drives the bonding sheet to rotate to a position flush with the impurity removal seat, the stones and gravel adhered to the surface water-absorbing resin of the bonding sheet are removed by the impurity removal seat, and only the water absorbed by the water-absorbing resin is retained.

[0007] According to the above technical solution, bearing sleeves are arranged in a straight line on the outer wall of the fixed rod, and a plurality of elastic members are arranged in a circle on the inner wall of the bonding sheet, and one end of the elastic member is in contact with the outer wall of the bearing sleeve. When the bonding sheet is pressed against the bottom surface of the expansion joint, the bonding sheet will be pressed downward, and the upper elastic member will contract and the lower elastic member will stretch. The bonding sheets not subjected to the extrusion force will still maintain their previous height. When removed, due to the elastic recovery of the elastic members, each bonding sheet can neatly return to its original position.

[0008] According to the above technical solution, a plurality of connecting blocks are evenly installed on the side wall of the bonding sheet, one end of the connecting block is connected with an elastic wire, and one end of the elastic wire is fixedly connected to the outer wall of the fixed rod. Due to the existence of friction when the bonding sheet contacts the bottom surface of the expansion joint, the bonding sheet will roll at a certain angle against the bottom surface in the section where it moves to the topmost part. At this time, the elastic wire will be pulled and stretched. When the elastic wire is stretched, it will store energy. When the bonding sheet moves to a position where it does not contact the bottom surface of the expansion joint, it will return to its original angle, which is convenient for the water-absorbing resin to always return to the middle angle and facilitate the detection of the liquid content.

[0009] According to the above technical solution, one side of the impurity removal seat is arc-shaped and adapted to the outer contour of the bonding sheet. A plurality of installation grooves are evenly opened on one side of the impurity removal seat. A cleaning brush is slidably inserted into the inner wall of the installation groove. One end of each installation groove extends inward to form an inner flow channel, and the plurality of inner flow channels communicate and converge with each other. When the bonding sheet rotates to the middle position, since there are many dirt such as sand and gravel on the bottom surface of the expansion joint, which will affect the accuracy of the liquid content detection. Therefore, when it rotates to the cleaning brush, the cleaning brush is used to brush the surface of the water-absorbing resin to remove the surface dirt. The cleaning brush can slide in the installation groove. When the liquid pressure in the installation groove increases, the cleaning brush will extend outward. When the liquid pressure decreases, the cleaning brush will retract inward to facilitate adjusting the cleaning strength of the surface of the bonding sheet.

[0010] According to the above technical solution, a square housing is fixedly installed on one side of the top of the main body. A ratchet wheel is rotatably installed on the inner wall of the square housing. Oblique support arms are rotatably installed at the central positions on both sides of the ratchet wheel. A spring is fixedly installed at one end of the oblique support arm. A latch is rotatably arranged on the oblique support arm. One end of the spring is in contact with the latch. The latch meshes with the ratchet wheel. Piston plates are slidably installed on the inner walls on both sides of the square housing. Liquid pipelines are connected through both ends of the square housing in a penetrating manner. One end of the liquid pipeline is connected to the inner flow channel in a penetrating manner. When the angle of the oblique support arm changes towards the parallel direction, the piston plates will be squeezed outwards. When the main shaft rotates normally in the forward direction, the water seepage detection work is carried out normally at this time, which will drive the ratchet wheel to rotate counterclockwise. At this time, the angle of the oblique support arm remains unchanged, the position of the piston plate remains unchanged, and the cleaning brush still maintains its original position. When the cleaning brush does not completely remove the grit on the water-absorbing resin, since the bonding piece will be resisted when moving to the liquid sensor at the bottom, due to the reaction force, the main shaft will be squeezed by a certain angle in the opposite direction. At this time, the main shaft will drive the ratchet wheel to reverse, and use the latch to drive the angle of the oblique support arm to change. The angle of the oblique support arm moves towards the parallel position, squeezing the two piston plates outwards, squeezing the liquid in the square housing into the liquid pipeline and introducing it into the inner flow channel, increasing the liquid pressure in the installation groove, squeezing the cleaning brush outwards, and enabling the cleaning brush to fit more closely to the water-absorbing resin for cleaning, facilitating automatic adjustment of the cleaning force when encountering resistance; at this time, the drive motor rotates in the reverse direction, so that the cleaning brush cleans the bonding piece again.

[0011] According to the above technical solution, one end of the main shaft extends into the inner wall of the square housing. One end of the main shaft movably penetrates the oblique support arm and is connected to the center of rotation of the ratchet wheel through a sliding key. The main body is composed of two parts on the left and right, and an electric telescopic rod is connected between the two parts on the left and right. When it is necessary to restore the piston plate to its original position, start the electric telescopic rod to stretch it, which will separate the two parts of the main body on the left and right. At this time, the end of the main shaft will disengage from the ratchet wheel, and the ratchet wheel can rotate freely without obstruction. At this time, manually squeeze the cleaning brush to a suitable position in the installation groove, and then combine the two parts of the main body on the left and right. At this time, the main shaft is reconnected to the ratchet wheel, facilitating manual adjustment of the position of the cleaning brush.

[0012] According to the above technical solution, a plurality of support arms are movably installed around the main body through hinges. An electric propeller is installed at one end of the support arm. Negative pressure pipelines are correspondingly installed on both sides of the main body. A vacuum suction cup is installed at one end of the negative pressure pipeline. The other end of the negative pressure pipeline is connected in a penetrating manner to a vacuum pump. The connection part between the vacuum pump and the negative pressure pipeline is a sliding plug-in fit. The vacuum pump is used to introduce negative pressure into the vacuum suction cup. The vacuum suction cup adheres to the bottom surface of the bridge next to the expansion joint, facilitating fixing the position for water seepage detection. The electric propeller is used to control the entire main body to fly, facilitating flying to the expansion joint position for detection, and starting vacuum adsorption when flying to the position.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: By providing a plurality of fitting pieces, when the fitting pieces detect whether the bottom of the bridge expansion joint is water seeping, since the positions of the respective fitting pieces are independent, each fitting piece can be made to fit as closely as possible to the bottom of the bridge expansion joint through extrusion, facilitating the detection of the specific part where water seeps. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings are used to provide a further understanding of the present invention and form a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 is a schematic diagram of the installation of the vacuum pump of the present invention;

[0017] Figure 3 is a schematic diagram of the installation of the square housing of the present invention;

[0018] Figure 4 is a schematic cross-sectional structure diagram of the fitting piece of the present invention;

[0019] Figure 5 is a schematic front view structure diagram of the fitting piece of the present invention;

[0020] Figure 6 is a schematic diagram of the internal structure of the square housing of the present invention;

[0021] Figure 7 is a schematic diagram of the working principle of the present invention;

[0022] 1. Main body; 11. Support arm; 12. Electric propeller; 13. Vacuum suction cup; 14. Negative pressure pipeline; 15. Vacuum pump; 16. Electric telescopic rod; 2. Dryer; 3. Impurity removal seat; 31. Liquid pipeline; 32. Square housing; 321. Piston plate; 322. Ratchet; 323. Inclined support arm; 324. Block; 325. Spring; 33. Cleaning brush; 34. Installation groove; 35. Inner flow channel; 4. Arch frame; 41. Main shaft; 42. Fitting piece; 43. Expansion part; 421. Fixed rod; 422. Elastic wire; 423. Elastic member; 424. Bearing sleeve; 425. Connecting block; 426. Water-absorbing resin; 5. Liquid sensor; 88. Motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1-7 , the present invention provides a technical solution: a bridge anti-seepage detection device in bridge engineering, including a main body 1. An arch frame 4 is installed on the top of the main body 1. A main shaft 41 is rotatably installed on the arch frame 4. An expansion part 43 is correspondingly installed on the outer wall of the main shaft 41. A fixing rod 421 is fixedly installed on one side of the expansion part 43 by welding. A plurality of fitting pieces 42 are movably arranged on the outer wall of the fixing rod 421. A water-absorbing resin 426 is installed on the top of the fitting piece 42. A plurality of liquid sensors 5 are linearly arranged on the top of the main body 1. The surface contour of the liquid sensor 5 is adapted to the outer contour of the fitting piece 42. A motor 88 is installed on one side of the arch frame 4. The output end of the motor 88 is connected to the main shaft 41. When it is necessary to judge the water seepage at the bottom of the bridge expansion joint, the main body 1 is placed at the middle position at the bottom of the bridge expansion joint, so that the motor 88 drives the main shaft 41 to rotate, driving the fitting piece 42 to move to the bottom of the bridge expansion joint. The water-absorbing resin 426 on its top fits with the bottom contour. Since the bottom contour is uneven, the plurality of movably arranged fitting pieces 42 can fit more closely to the bottom of the bridge expansion joint, so that the water-absorbing resin 426 can contact the water-seeping gap. The water-absorbing resin 426 will absorb water when it encounters a water-seeping crack. When it rotates to the liquid sensor 5 directly below, it can detect the liquid content, thereby judging whether there is water seepage at the current position.

[0025] A dryer 2 is installed on one side of the top of the main body 1, and a debris removal seat 3 is installed on the other side of the top of the main body 1. When the main shaft 41 drives the fitting piece 42 to rotate to a position flush with the dryer 2, the dryer 2 dries the water-absorbing resin 426 on the fitting piece 42 to facilitate detecting whether there is water seepage at the next position. When the main shaft 41 drives the fitting piece 42 to rotate to a position flush with the debris removal seat 3, the debris removal seat 3 removes the stones and gravel adhered to the water-absorbing resin 426 on the surface of the fitting piece 42, and only retains the water absorbed by the water-absorbing resin 426.

[0026] The outer wall of the fixed rod 421 is provided with bearing sleeves 424 arranged in a straight line. A plurality of elastic members 423 are installed circumferentially on the inner wall of the fitting piece 42, and one end of the elastic member 423 is in contact with the outer wall of the bearing sleeve 424. When the fitting piece 42 is squeezed against the bottom surface of the expansion joint, the fitting piece 42 will be squeezed downward, causing the upper elastic member 423 to contract and the lower elastic member 423 to stretch. The fitting piece 42 that is not subjected to the squeezing force will still maintain its previous height. When removed, due to the elastic recovery of the elastic member 423, each fitting piece 42 can neatly return to its original position.

[0027] A plurality of connecting blocks 425 are evenly installed on the side wall of the fitting piece 42. One end of the connecting block 425 is connected to an elastic wire 422, and one end of the elastic wire 422 is fixedly connected to the outer wall of the fixed rod 421. Due to the existence of friction when the fitting piece 42 contacts the bottom surface of the expansion joint, the fitting piece 42 will roll at a certain angle while sticking to the bottom surface in the interval when it moves to the topmost position. At this time, the elastic wire 422 will be pulled and stretched. When the elastic wire 422 is stretched, it will store energy. When the fitting piece 42 moves to a position where it does not contact the bottom surface of the expansion joint, it will return to its original angle, facilitating the water-absorbing resin 426 to always return to the middle angle, which is convenient for detecting the liquid content.

[0028] One side of the impurity removal seat 3 is arc-shaped and is adapted to the outer contour of the fitting piece 42. A plurality of installation grooves 34 are evenly opened on one side of the impurity removal seat 3. A cleaning brush 33 is slidably inserted into the inner wall of the installation groove 34. One end of each installation groove 34 extends inward to form an inner flow channel 35, and the plurality of inner flow channels 35 communicate and converge with each other. When the fitting piece 42 rotates to the middle position, since there are many dirt such as sand and gravel on the bottom surface of the expansion joint, which will affect the accuracy of the liquid content detection. Therefore, when it rotates to the cleaning brush 33, the cleaning brush 33 is used to brush the surface of the water-absorbing resin 426 to remove the dirt on the surface. The cleaning brush 33 can slide in the installation groove 34. When the liquid pressure in the installation groove 34 increases, the cleaning brush 33 will extend outward. When the liquid pressure decreases, the cleaning brush 33 will retract inward, facilitating the adjustment of the cleaning strength of the surface of the fitting piece 42.

[0029] On one side of the top of the main body 1, a square housing 32 is fixedly installed. Inside the inner wall of the square housing 32, a ratchet wheel 322 is rotatably installed. At the center of both sides of the ratchet wheel 322, inclined support arms 323 are correspondingly rotatably installed. At one end of the inclined support arm 323, a spring 325 is fixedly installed. A latch 324 is rotatably arranged on the inclined support arm 323. One end of the spring 325 is in contact with the latch 324. The latch 324 meshes with the ratchet wheel 322. On both sides of the inner wall of the square housing 32, piston plates 321 are slidably installed. At both ends of the square housing 32, liquid pipelines 31 are connected through. One end of the liquid pipeline 31 is connected through to the inner flow channel 35. When the angle of the inclined support arm 323 changes towards the parallel direction, it will cause the piston plates 321 to be squeezed outwards. When the main shaft 41 rotates normally in the forward direction, at this time, the water seepage detection work is carried out normally, which will drive the ratchet wheel 322 to rotate counterclockwise. At this time, the angle of the inclined support arm 323 remains unchanged, the position of the piston plate 321 remains unchanged, and the cleaning brush 33 still maintains its original position. When the cleaning brush 33 does not completely remove the grit on the water-absorbing resin 426, since the fitting piece 42 will be resisted when moving to the liquid sensor 5 at the bottom, due to the reaction force, the main shaft 41 will be squeezed by a certain angle in the opposite direction. At this time, the main shaft 41 will drive the ratchet wheel 322 to rotate in reverse, using the latch 324 to drive the angle of the inclined support arm 323 to change. The angle of the inclined support arm 323 moves towards the parallel position, squeezing the two piston plates 321 outwards, squeezing the liquid in the square housing 32 into the liquid pipeline 31 and introducing it into the inner flow channel 35, increasing the liquid pressure in the installation groove 34, squeezing the cleaning brush 33 outwards, and enabling the cleaning brush 33 to fit more closely to the water-absorbing resin 426 for cleaning, facilitating automatic adjustment of the cleaning force when encountering resistance; at this time, the drive motor 88 rotates in the reverse direction, enabling the cleaning brush 33 to clean the fitting piece 42 again.

[0030] One end of the main shaft 41 extends into the inner wall of the square housing 32. One end of the main shaft 41 movably penetrates the inclined support arm 323 and is connected to the center of rotation of the ratchet wheel 322 through a sliding key. The main body 1 is composed of two parts on the left and right, and an electric telescopic rod 16 is connected between the two parts on the left and right. When it is necessary to restore the piston plate 321 to its original position, start the electric telescopic rod 16 to stretch it, which will separate the two parts of the main body 1 on the left and right. At this time, the end of the main shaft 41 will disengage from the ratchet wheel 322, and the ratchet wheel 322 can rotate freely without obstruction. At this time, manually squeeze the cleaning brush 33 to a suitable position in the installation groove 34, and then combine the two parts of the main body 1 on the left and right. At this time, the main shaft 41 is reconnected to the ratchet wheel 322, facilitating manual adjustment of the position of the cleaning brush 33.

[0031] A plurality of support arms 11 are movably installed around the main body 1 through hinges. One end of each support arm 11 is equipped with an electric propeller 12. Negative pressure pipes 14 are correspondingly installed on both sides of the main body 1. One end of each negative pressure pipe 14 is equipped with a vacuum suction cup 13. The other end of the negative pressure pipe 14 is connected through penetration to a vacuum pump 15. The connection part between the vacuum pump 15 and the negative pressure pipe 14 is in a sliding plug-in fit. By means of the vacuum pump 15, negative pressure is introduced into the vacuum suction cup 13. The vacuum suction cup 13 adheres to the bottom surface of the bridge beside the expansion joint, facilitating the fixation of the position for water seepage detection. The entire main body 1 is controlled to fly through the electric propeller 12, facilitating flying to the position of the expansion joint for detection, and starting vacuum adsorption when flying to the position.

[0032] By providing a plurality of fitting pieces 42, when the fitting pieces 42 detect whether there is water seepage at the bottom of the bridge expansion joint, since the positions of the respective fitting pieces 42 are independent, each fitting piece 42 can be made to fit as closely as possible to the bottom of the bridge expansion joint through extrusion, facilitating the detection of the specific location of water seepage.

[0033] It should be noted that in this text, relational terms such as first and second 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0034] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacement of some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A bridge anti-seepage detection device in bridge engineering, characterized by: The invention comprises a main body (1), wherein an arch frame (4) is mounted on the top of the main body (1), a main shaft (41) is rotatably mounted on the arch frame (4), an expansion portion (43) is mounted on the outer wall of the main shaft (41), a fixing rod (421) is fixedly mounted on one side of the expansion portion (43) by welding, a plurality of bonding sheets (42) are movably arranged along a straight line on the outer wall of the fixing rod (421), a water-absorbing resin (426) is mounted on the top of the bonding sheet (42), a plurality of liquid sensors (5) are mounted on the top of the main body (1), the surface contour of the liquid sensor (5) is matched with the outer contour of the bonding sheet (42), a motor (88) is mounted on one side of the arch frame (4), and the output end of the motor (88) is connected to the main shaft (41); A dryer (2) is installed on one side of the top of the main body (1), and a debris removal seat (3) is installed on the other side of the top of the main body (1); The outer wall of the fixing rod (421) is provided with a plurality of bearing sleeves (424) arranged in a straight line, and the inner wall of the bonding sheet (42) is provided with a plurality of elastic members (423) arranged in a circumferential manner, and one end of the elastic member (423) is in contact with the outer wall of the bearing sleeve (424); A plurality of connection blocks (425) are evenly mounted on the side wall of the bonding sheet (42), one end of the connection block (425) is connected to an elastic thread (422), and one end of the elastic thread (422) is fixedly connected to the outer wall of the fixing rod (421); One side of the impurity removal seat (3) is arc-shaped and matches the outer contour of the bonding sheet (42); a plurality of mounting grooves (34) are evenly provided on one side of the impurity removal seat (3); a cleaning brush (33) is slidably inserted into the inner wall of the mounting groove (34); one end of each mounting groove (34) extends inwardly to provide an inner flow channel (35); and the plurality of inner flow channels (35) are interconnected and convergently connected; A square housing (32) is fixedly mounted on one side of the top of the main body (1); a ratchet (322) is rotatably mounted on the inner wall of the square housing (32); oblique support arms (323) are rotatably mounted at the centers of both sides of the ratchet (322); a spring (325) is fixedly mounted on one end of the oblique support arm (323); a clamping block (324) is rotatably mounted on the oblique support arm (323); one end of the spring (325) is in contact with the clamping block (324); the clamping block (324) and the ratchet (322) are meshed with each other; piston plates (321) are slidably mounted on the inner walls of both sides of the square housing (32); liquid pipes (31) are through-connected at both ends of the square housing (32); and one end of the liquid pipe (31) is through-connected to the inner flow channel (35); One end of the main shaft (41) extends into the inner wall of the square housing (32); one end of the main shaft (41) movably passes through the oblique support arm (323) and is connected to the rotation center of the ratchet wheel (322) via a sliding key; the main body (1) is composed of two left and right parts, and an electric telescopic rod (16) is connected between the left and right parts; The motor (88) drives the main shaft (41) to rotate, driving the bonding sheet (42) to move to the bottom of the bridge expansion joint; when the main shaft (41) drives the bonding sheet (42) to rotate to a position flush with the dryer (2), the water-absorbing resin (426) on the bonding sheet (42) is dried by the dryer (2) to facilitate the detection of whether the next position has water seepage; when the main shaft (41) drives the bonding sheet (42) to rotate to a position flush with the impurity removal seat (3), the impurity removal seat (3) removes stones and gravel adhered to the water-absorbing resin (426) on the surface of the bonding sheet (42); when the cleaning brush (33) does not remove the water-absorbing resin (426) When the grit on the surface is completely removed, the bonding sheet (42) encounters resistance when moving to the liquid sensor (5) at the bottom, and the reaction force squeezes the main shaft (41) in the opposite direction by a certain angle. At this time, the main shaft (41) drives the ratchet wheel (322) to reverse, and the angle of the inclined support arm (323) is driven by the block (324) to change. The angle of the inclined support arm (323) moves to a parallel position, squeezing the two piston plates (321) outward, squeezing the liquid in the square shell (32) into the liquid pipe (31) and into the inner flow channel (35), so that the liquid pressure in the mounting groove (34) increases, squeezing the cleaning brush (33) outward.

2. The anti-seepage detection device for bridges in bridge engineering according to claim 1, characterized in that: A plurality of arms (11) are movably mounted on the periphery of the main body (1) via hinges, one end of each arm (11) being mounted with an electric propeller (12), negative pressure pipes (14) being mounted on corresponding sides of the main body (1), one end of each negative pressure pipe (14) being mounted with a vacuum suction cup (13), and the other end of each negative pressure pipe (14) being connected to a vacuum pump (15), wherein the connection between the vacuum pump (15) and the negative pressure pipe (14) is a sliding plug-in fit.

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