Dam body gap detection equipment for hydraulic engineering

Abstract

The invention relates to the technical field of hydraulic engineering equipment, in particular to dam body gap detection equipment for hydraulic engineering, which comprises a moving vehicle and a limiting seat fixedly connected to the top of the moving vehicle, a display screen is placed on the limiting seat, hanging rings are symmetrically and fixedly connected to the moving vehicle, a mounting frame is fixedly connected to the top of the moving vehicle, and an internal thread cylinder is slidably connected to the mounting frame. According to the invention, the detection head moves to detect the dam body gap through the mobile vehicle, and when the detection head detects that the data of the gap exceeds the threshold value preset by the control module, the protruding ring rotates, so that the protruding position pushes the marking rod to move downwards to mark the initial point of the position where the gap is serious; and then the detection head continues to move to detect that the gap is located at the reasonable position, the marking rod moves downwards to mark the end point of the serious position of the gap, in this way, detection of the dam body gap can be completed, the serious position of the dam body gap can be marked, follow-up processing is facilitated, and therefore the detection effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy engineering equipment, and in particular to a dam body crack detection device for water conservancy engineering. Background Art

[0002] In water conservancy projects, the integrity and stability of the dam body, a key flow-control structure, are crucial. However, due to long-term influences such as water erosion, geological changes, and material aging, various cracks may appear on the surface and inside the dam body. These cracks not only affect the dam's structural strength but also become potential leak points, posing a serious threat to the safe operation of the water conservancy project. Therefore, regular inspection of cracks in the dam body is necessary to ensure its safe operation.

[0003] A Chinese patent with announcement number CN221764413U discloses a dam body gap detection device for water conservancy projects, including a support base, a roller is embedded and installed on the rear side of the lower end of the support base, and a universal wheel is embedded and installed on the front side of the lower end of the support base, contraction grooves are provided on both sides of the center of the lower end of the support base, and a first electric push rod is inserted and installed on the upper end of the contraction groove, a fixed support block is installed at one end of the first electric push rod, a positioning indicator is installed at the center position of the front side of the support base, and an air blowing device is embedded and installed at the center position of the lower end of the support base. Although the above patent can detect the gaps in the dam body, it cannot mark the position where the gap is serious when it is detected, resulting in the subsequent operator having to find the position where the gap is serious based on the taken pictures, which is more troublesome and affects the detection effect.

[0004] The present invention aims to solve the problems existing in the above patents. To this end, a dam crack detection device for water conservancy projects is proposed, which can mark the locations with serious cracks, facilitate subsequent processing, and improve the detection effect. Summary of the Invention

[0005] In order to overcome the disadvantage that when a location with serious gaps is detected, it is impossible to mark it, which results in subsequent operators having to find the location with serious gaps based on the taken pictures, which is troublesome and affects the detection effect, the present invention provides a dam gap detection device for water conservancy projects that can mark the location with serious gaps, facilitate subsequent processing, and improve the detection effect.

[0006] The present invention is achieved through the following technical solutions: The cam is fixed on the top of the mobile carriage, and the detection head is fixed on the bottom end of the internal threaded barrel. The detection head and the display screen are electrically connected through a control module. The cam is fixed on the top end of the mobile carriage, and the detection head is electrically connected to the display screen through a control module. The cam is fixed on the top end of the mobile carriage, and the detection head is electrically connected to the display screen through a control module. The cam is fixed on the top end of the mobile carriage, and the detection head is electrically connected to the display screen through a control module. The cam is fixed on the top end of the mobile carriage, and the detection head is electrically connected to the display screen through a control module. The cam is fixed on the top end of the mobile carriage, and the detection head is electrically connected to the display screen through a control module. The cam is

[0007] Further explanation, the trigger assembly includes a raised ring rotatably connected to the inner circumference of the rotating ring. The raised ring rotates and contacts the marking rod to drive the marking rod to move downward. A worm gear is fixed to the top of the raised ring along the circumference, and an electric worm gear engaged with the worm gear is installed at the bottom of the mobile vehicle.

[0008] Further explanation, the feeding assembly includes an annular tube fixedly connected between the two sides of the mobile vehicle, an annular plate is rotatably connected to the inner side of the annular tube, a hose is connected to the annular plate, a control valve is installed between the tail end of the hose and the marking rod, a loading barrel is fixedly connected to the top of the mobile vehicle, a material guide pipe is connected to the bottom of the loading barrel, and the tail end of the material guide pipe is fixedly connected to the annular tube.

[0009] Further explanation, the dam gap detection equipment for water conservancy projects also includes a cleaning component, which includes support plates symmetrically fixed to the top of the mobile vehicle, a rotating shaft rotatably connected between the support plates, a torsion spring connected between the rotating shaft and one of the support plates, a sleeve symmetrically fixed on the rotating shaft, a movable plate slidingly connected to the inner side of the sleeve, a buffer spring connected between the movable plate and the sleeve, a brush roller rotatably connected between the movable plates, used to brush away impurities in the gap, a guide wheel rotatably connected to the lower part of the movable plate, used to guide the movement of the movable plate, a drive motor is installed on one of the movable plates, and the output shaft end of the drive motor is connected to the front end of the brush roller through a bevel gear set.

[0010] To further illustrate, the cleaning assembly further includes a guide wheel rotatably connected to the lower portion of the movable plate for guiding the movable plate.

[0011] Further explanation: the dam gap detection equipment for water conservancy projects also includes a protection component, which includes an annular airbag fixed to the circumference of the detection head for protecting the detection head. A cylinder body is fixed to the mobile vehicle, and an air guide pipe is connected to the cylinder body. The tail end of the air guide pipe is fixedly connected to the annular airbag, and a piston rod is slidably connected to the inside of the cylinder body. A blocking component is provided on the mobile vehicle for blocking and sealing the annular airbag.

[0012] To further illustrate, the blocking assembly includes a closing plate that is laterally slidably connected to the mobile vehicle, the closing plate is fixedly connected to the end of the piston rod, and a screw rod that is rotatably connected to the closing plate is rotatably passed through the mobile vehicle.

[0013] Further explanation: the dam body gap detection equipment for water conservancy projects also includes a lighting lamp installed on the bottom of the mobile vehicle to illuminate the gap position.

[0014] The beneficial effects of the present invention are: 1. The detection head is moved by the mobile vehicle to detect the gap in the dam body. When the detection head detects that the gap data exceeds the threshold preset by the control module, the raised ring rotates so that the raised position pushes the marking rod to move downward to mark the initial point of the position where the gap is serious. Then the detection head continues to move and detects that the gap is at a reasonable position. The marking rod moves downward to mark the end point of the position where the gap is serious. In this way, the detection of the gap in the dam body can be completed, and the position where the gap in the dam body is serious can also be marked, which is convenient for subsequent processing and thus improves the detection effect.

[0015] 2. Under the action of the brush roller, the impurities in the gap can be brushed away first, and the detection head then detects the gap after the impurities are removed, which can prevent the impurities from affecting the detection of the gap, thereby improving the accuracy of the gap detection.

[0016] 3. Under the action of the annular airbag and the closing plate, the detection head that is not in use can be protected, which can prevent the detection head from being attached to foreign impurities or being damaged by foreign debris and affecting subsequent use, thereby ensuring the safety of the detection head. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the internal threaded barrel and the detection head of the present invention.

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the fixed ring, rotating ring and outer gear ring of the present invention.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the marking rod and the connecting spring of the present invention.

[0021] Figure 5 This is a structural separation diagram of the rotating ring, outer gear ring and raised ring of the present invention.

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the cleaning component of the present invention.

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the guide wheel of the present invention.

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the protection component of the present invention.

[0025] Figure 9 It is a schematic diagram of the three-dimensional structure of the closing plate of the present invention.

[0026] Figure 10 It is a schematic diagram of the three-dimensional structure of the lighting lamp of the present invention.

[0027] Among them: 1-mobile car, 2-limit seat, 3-display screen, 4-hanging ring, 5-mounting frame, 6-internal thread barrel, 7-electric screw, 8-detection head, 9-fixing ring, 10-rotating ring, 11-outer gear ring, 111-electric gear, 12-raised ring, 121-worm gear, 122-electric worm, 13-loading barrel, 131-guide pipe, 132-annular pipe, 133-annular plate, 134-hose, 13 5-control valve, 14-marking rod, 15-connecting spring, 16-support plate, 161-rotating shaft, 162-torsion spring, 163-sleeve, 164-movable plate, 1641-guide wheel, 165-buffer spring, 166-brush roller, 167-drive motor, 17-annular airbag, 171-cylinder body, 172-piston rod, 173-air guide tube, 174-closing plate, 175-screw, 18-lighting lamp. DETAILED DESCRIPTION

[0028] Example: A dam body gap detection device for water conservancy projects, please refer to Figure 1-Figure 7As shown, it includes a mobile car 1 and a limiting seat 2 fixed to the left front side of the top of the mobile car 1, a display screen 3 is placed on the limiting seat 2, a hanging ring 4 is fixed to the front and back symmetrically on the left side of the mobile car 1, a mounting bracket 5 is fixed to the right side of the top of the mobile car 1, an internal threaded barrel 6 is vertically slidably connected to the middle of the mounting bracket 5, a detection head 8 is fixed to the bottom end of the internal threaded barrel 6, the detection head 8 is composed of a laser rangefinder and a crack width meter, the detection head 8 is electrically connected to the display screen 3 through a control module, an electric screw 7 is vertically installed in the middle of the top of the mounting bracket 5, the electric screw 7 is threadedly connected to the inner side of the internal threaded barrel 6, and also includes a fixed ring 9, a rotating ring 10, an outer gear ring 11, an electric gear 111, a trigger assembly, a feeding assembly, a marking rod 14 and a connecting spring 15, a fixed ring 9 is fixed to the right side of the bottom of the mobile car 1, a rotating ring 10 is fixed to the inner side of the fixed ring 9 along the circumferential direction, and a rotating ring 10 is fixed to the inner side of the fixed ring 9. The bottom of the ring 10 is connected to the outer gear ring 11 in a circumferentially rotating manner, and a marking rod 14 is connected to the left side of the outer gear ring 11 in a vertical sliding manner. A connecting spring 15 is connected between the lower part of the marking rod 14 and the inner side of the outer gear ring 11. An electric gear 111 is installed on the right side of the fixed ring 9, and the electric gear 111 is engaged with the outer gear ring 11. The electric gear 111 is electrically connected to the detection head 8 through a control module. The control module presets the crack threshold to a width ≥ 2mm or a depth ≥ 50mm (the crack position exceeding this range is a serious position). A trigger assembly is provided on the rotating ring 10, and the trigger assembly is used to drive the marking rod 14 to move downward and contact the gap position, so that the marking rod 14 can mark the position where the gap is serious. A feeding assembly is provided between the mobile vehicle 1 and the marking rod 14. When the feeding assembly is in operation, the feeding assembly can discharge the paint into the marking rod 14.

[0029] See also Figure 3 and Figure 4 As shown, the trigger assembly includes a raised ring 12, a worm gear 121 and an electric worm 122. The raised ring 12 is connected to the inner side of the rotating ring 10 in a circumferential rotation. The protrusion of the raised ring 12 is on the rear side. The raised ring 12 rotates and contacts the marking rod 14. When the raised ring 12 rotates, the raised ring 12 can drive the marking rod 14 to move downward. The worm gear 121 is fixed to the top of the raised ring 12 in the circumferential direction. The electric worm 122 is installed laterally on the front side of the bottom of the mobile vehicle 1, and the electric worm 122 is engaged with the worm gear 121.

[0030] See also Figure 3 and Figure 4As shown, the feeding assembly includes a charging barrel 13, a guide pipe 131, an annular pipe 132, an annular plate 133, a hose 134 and a control valve 135. The annular pipe 132 is fixedly connected between the right sides of the front and rear sides of the mobile vehicle 1. The annular plate 133 is rotatably connected to the inner side of the annular pipe 132. The hose 134 is connected to the left side of the bottom of the annular plate 133. The control valve 135 is installed between the tail end of the hose 134 and the lower part of the marking rod 14. The charging barrel 13 is fixedly connected to the right side of the top of the mobile vehicle 1. The guide pipe 131 is connected to the left side of the bottom of the charging barrel 13. The tail end of the guide pipe 131 is fixedly connected to the right side of the top of the annular pipe 132.

[0031] See also Figure 6 and Figure 7 As shown, the dam gap detection equipment for water conservancy projects also includes a cleaning component installed on the mobile vehicle 1, and the cleaning component includes a support plate 16, a rotating shaft 161, a torsion spring 162, a sleeve 163, a movable plate 164, a guide wheel 1641, a buffer spring 165, a brush roller 166 and a drive motor 167. The support plate 16 is fixedly connected to the right side of the top of the mobile vehicle 1 symmetrically in front and back, and the upper parts of the front and rear support plates 16 are rotatably connected with the rotating shaft 161. A torsion spring 162 is connected between the rear side of the rotating shaft 161 and the upper part of the rear support plate 16. The sleeve 163 is fixedly mounted on the rotating shaft 161 symmetrically in front and back, and the sleeves 163 on the front and rear sides are The sides are slidably connected with movable plates 164, and a buffer spring 165 is connected between the top of the movable plate 164 and the top of the sleeve 163. A brush roller 166 is rotatably connected between the lower parts of the front and rear movable plates 164. When the brush roller 166 rotates, the brush roller 166 can brush away impurities in the gap. The lower parts of the front and rear movable plates 164 are rotatably connected with guide wheels 1641, and the guide wheels 1641 can guide the movement of the movable plate 164. A drive motor 167 is installed on the front side of the front movable plate 164, and the output shaft end of the drive motor 167 is connected to the front end of the brush roller 166 through a bevel gear set.

[0032] When it is necessary to perform gap detection on the horizontal position of the dam body, first take the display screen 3 out of the limit seat 2, then start the electric screw 7 to rotate forward to drive the internal threaded barrel 6 to move downward, and the internal threaded barrel 6 moves downward to drive the detection head 8 to move downward. When the detection head 8 moves downward to a position suitable for gap detection, turn off the electric screw 7, the detection head 8 stops moving downward, and then push the moving vehicle 1 to move to the right, which enables the movable plate 164, the detection head 8 and the marking rod 14 to move to the right, and the brush roller 166 is driven to move to the right by the movable plate 164, and the guide wheel 1641 can guide the movable plate 164, so that the friction between the movable plate 164 and the ground is reduced, making the movable plate 164 move more smoothly, and start the drive motor 167. 167 drives the brush roller 166 to rotate through the bevel gear set, and the brush roller 166 moves to the right to first remove impurities in the gap. Due to the action of the torsion spring 162 and the buffer spring 165, the brush roller 166 can adapt to the depressions and protrusions in the horizontal position of the dam to remove the gap. In this way, impurities can be prevented from affecting the detection of the gap, thereby improving the accuracy of the gap detection. Subsequently, the detection head 8 continues to move to the right with the mobile vehicle 1 to detect the gap from which impurities have been removed, and detects the depth and width of the gap. The detection head 8 transmits the detected data to the display screen 3 for display, and the operator can view the data on the display screen 3. When the detection head 8 detects that the gap data exceeds the threshold value preset by the control module, it indicates that the gap position is severe. When the marking rod 14 is in the correct position, the operator can stop pushing the mobile vehicle 1, and the detection head 8 drives the outer gear ring 11 to rotate alternately forward and reverse through the electric gear 111 of the control module, and the outer gear ring 11 drives the marking rod 14 to swing back and forth. When the marking rod 14 swings back and forth to correspond to the gap, the electric gear 111 is turned off, and the outer gear ring 11 stops driving the marking rod 14 to swing back and forth. Then the electric worm 122 starts to drive the worm wheel 121 to rotate, and the rotation of the worm wheel 121 drives the raised ring 12 to rotate. When the raised ring 12 rotates so that the protrusion contacts the top of the marking rod 14, the raised ring 12 drives the marking rod 14 to move downward, and the connecting spring 15 is stretched, and the marking rod 14 moves downward to contact the gap. The marking rod 14 marks the initial point where the gap is serious. When the raised ring 12 continues to rotate to reset, The raised ring 12 is out of contact with the marking rod 14. Due to the action of the connecting spring 15, the marking rod 14 moves upward and resets, and continues to push the mobile vehicle 1 to move to the right, so that the detection head 8 continues to detect the position where the gap is serious. When the detection head 8 continues to move and detects that the gap is at a reasonable position, it stops pushing the mobile vehicle 1 to the right, and the electric gear 111 starts again to drive the outer gear ring 11 to rotate, so that the marking rod 14 swings back and forth corresponding to the gap. Then the electric worm 122 starts again to drive the worm wheel 121 to rotate, and the worm wheel 121 drives the raised ring 12 to rotate and push the marking rod 14 downward again. The marking rod 14 moves downward to mark the end point of the position where the gap is serious. In this way, the gap between the mark of the initial point and the mark of the end point is a serious gap.Then it is necessary to focus on processing, and so on repeatedly to continuously detect the gap. When the marking rod 14 is in use, the control valve 135 is started to open, so that the pigment in the charging barrel 13 is discharged into the annular tube 132 through the guide tube 131, and the pigment in the annular tube 132 is discharged into the hose 134 through the annular plate 133. The hose 134 discharges the pigment into the marking rod 14, which also fills the pigment in the marking rod 14. The control valve 135 is closed, and the pigment stops being discharged into the marking rod 14. When the gap detection at the horizontal position of the dam body is completed, the moving vehicle 1 is stopped, the drive motor 167 is turned off, the brush roller 166 stops rotating, and then Start the electric screw 7 in reverse to drive the internal threaded barrel 6 to move upward and reset. The internal threaded barrel 6 drives the detection head 8 to move upward and reset. Then put the display screen 3 into the limit seat 2. Similarly, when it is necessary to detect the gap at the tilted position of the dam body, first use the wire rope of the winch to tie the hanging ring 4, then start the winch to release the wire through the hanging ring 4 so that the mobile vehicle 1 moves along the tilt direction of the dam body, and then detect the gap at the tilted position of the dam body. At the same time, mark the position with serious gap. After the gap detection at the tilted position of the dam body is completed, start the winch to pull the mobile vehicle 1 back to its original position through the hanging ring 4, and separate the wire rope of the winch from the hanging ring 4. In this way, it is possible to complete the detection of the gap in the dam body and mark the position with serious gap in the dam body, which is convenient for subsequent processing and thus improves the detection effect.

[0033] See also Figure 8 and Figure 9 As shown, the dam body gap detection equipment for water conservancy projects also includes a protection component installed on the mobile vehicle 1 and the detection head 8, the protection component includes an annular airbag 17, a cylinder 171, a piston rod 172, an air guide tube 173 and a blocking component. The outer side of the detection head 8 is fixedly connected with the annular airbag 17 along the circumferential direction. When the annular airbag 17 is expanded, the annular airbag 17 can protect the detection head 8. The cylinder 171 is fixedly connected to the rear side of the top of the mobile vehicle 1. The right part of the front side of the cylinder 171 is connected to the air guide tube 173. The tail end of the air guide tube 173 is connected to the annular The rear side of the airbag 17 is fixedly connected, and the piston rod 172 is slidably connected to the inner side of the cylinder 171. A blocking assembly is provided on the mobile vehicle 1. When the blocking assembly is in operation, the blocking assembly can block and close the annular airbag 17; the blocking assembly includes a closing plate 174 and a screw rod 175. The middle part of the mobile vehicle 1 is laterally slidably connected to the closing plate 174, and the left side of the top of the closing plate 174 is fixedly connected to the end of the piston rod 172. The middle part of the left side of the mobile vehicle 1 is rotatably connected with a screw rod 175, and the screw rod 175 is threadedly connected to the left side of the closing plate 174.

[0034] When the detection head 8 is used up, the twisting screw 175 is rotated forward to drive the closing plate 174 to move to the right through the thread. The closing plate 174 moves to the right and is under the annular airbag 17. At the same time, the closing plate 174 moves to the right and also drives the piston rod 172 to move to the right. The piston rod 172 moves to the right and pushes the air in the cylinder 171 into the air guide tube 173. The air in the air guide tube 173 is discharged into the annular airbag 17. As the air is discharged, the annular airbag 17 expands and contacts the closing plate 174, and the twisting screw 175 stops. Rod 175, at this time the sealing plate 174 cooperates with the annular airbag 17 to protect the detection head 8. When the detection head 8 needs to be used, the screw rod 175 is twisted in the reverse direction to drive the sealing plate 174 to move leftward and reset through the thread. The leftward movement of the sealing plate 174 drives the piston rod 172 to move leftward. The leftward movement of the piston rod 172 draws the air in the annular airbag 17 back into the cylinder body 171 through the air guide tube 173. As the air is drawn out, the annular airbag 17 continuously contracts and resets without affecting the subsequent use of the detection head 8. In this way, the detection head 8 can be prevented from being attached to foreign matter or being damaged by foreign objects and affecting subsequent use, thereby ensuring the safety of the detection head 8.

[0035] See also Figure 10 As shown, the dam body gap detection equipment for water conservancy projects also includes a lighting lamp 18. The lighting lamp 18 is installed on the left side of the bottom of the mobile vehicle 1. The lighting lamp 18 can illuminate the gap position so that the gap can be detected more clearly.

[0036] When the detection head 8 is inspecting the dam body gap, the illumination lamp 18 is activated to illuminate the dam body gap, and then the detection head 8 inspects the illuminated gap. After the dam body gap inspection is completed, the illumination lamp 18 is turned off. This allows the detection head 8 to detect the gap more clearly, further improving the inspection effect.

Claims

1. A dam body gap detection device for water conservancy projects, comprising a mobile vehicle (1) and a limit seat (2) fixed to the top of the mobile vehicle (1), a display screen (3) placed on the limit seat (2), a hanging ring (4) symmetrically fixed to the mobile vehicle (1), a mounting frame (5) fixed to the top of the mobile vehicle (1), an internal threaded barrel (6) slidably connected to the mounting frame (5), a detection head (8) fixed to the bottom end of the internal threaded barrel (6), the detection head (8) and the display screen (3) are electrically connected through a control module, an electric screw (7) threadedly connected to the inner side of the internal threaded barrel (6) is installed on the mounting frame (5), and the device is characterized in that: The invention also includes a fixed ring (9) fixed to the bottom of the mobile vehicle (1), a rotating ring (10) fixed to the inner side of the fixed ring (9) along the circumferential direction, an outer gear ring (11) rotatably connected to the bottom of the rotating ring (10) along the circumferential direction, a marking rod (14) slidably connected to the inner side of the outer gear ring (11), a connecting spring (15) connected between the marking rod (14) and the outer gear ring (11), an electric gear (111) meshing with the outer gear ring (11) is installed on the fixed ring (9), a trigger assembly is provided on the rotating ring (10), the trigger assembly is used to drive the marking rod (14) to move downward and contact the gap position, so that the marking rod (14) marks the position where the gap is serious, and a feeding assembly is provided between the mobile vehicle (1) and the marking rod (14) for discharging pigment into the marking rod (14).

2. A dam body crack detection device for water conservancy projects according to claim 1, characterized in that: The trigger assembly includes a raised ring (12) rotatably connected to the inner circumference of the rotating ring (10), the raised ring (12) rotates to contact the marking rod (14) and is used to drive the marking rod (14) to move downward, a worm gear (121) is fixedly connected to the top of the raised ring (12) along the circumference, and an electric worm (122) meshing with the worm gear (121) is installed at the bottom of the mobile vehicle (1).

3. A dam body crack detection device for water conservancy projects according to claim 1, characterized in that: The feeding assembly includes an annular tube (132) fixedly connected between two sides of the mobile vehicle (1), an annular plate (133) is rotatably connected inside the annular tube (132), a hose (134) is connected to the annular plate (133), a control valve (135) is installed between the tail end of the hose (134) and the marking rod (14), a charging barrel (13) is fixedly connected to the top of the mobile vehicle (1), a material guide pipe (131) is connected to the bottom of the charging barrel (13), and the tail end of the material guide pipe (131) is fixedly connected to the annular tube (132).

4. The dam body crack detection device for water conservancy projects according to claim 1 is characterized in that: The dam body gap detection equipment for water conservancy projects also includes a cleaning component, which includes support plates (16) symmetrically fixed to the top of the mobile vehicle (1), a rotating shaft (161) rotatably connected between the support plates (16), a torsion spring (162) connected between the rotating shaft (161) and one of the support plates (16), a sleeve (163) symmetrically fixedly sleeved on the rotating shaft (161), a movable plate (164) slidably connected inside the sleeve (163), a buffer spring (165) connected between the movable plate (164) and the sleeve (163), a brush roller (166) rotatably connected between the movable plates (164) for brushing impurities in the gap, and a driving motor (167) installed on one of the movable plates (164), and the output shaft end of the driving motor (167) and the front end of the brush roller (166) are connected through a bevel gear set.

5. A dam body crack detection device for water conservancy projects according to claim 4, characterized in that: The cleaning assembly further comprises a guide wheel (1641) rotatably connected to the lower portion of the movable plate (164) for guiding the movable plate (164).

6. The dam body crack detection device for water conservancy projects according to claim 1 is characterized in that: The dam body gap detection device for water conservancy projects also includes a protection component, which includes an annular airbag (17) fixedly connected to the circumference of the detection head (8) for protecting the detection head (8). A cylinder (171) is fixedly connected to the cylinder (171), and an air guide tube (173) is connected to the cylinder (171). The tail end of the air guide tube (173) is fixedly connected to the annular airbag (17). A piston rod (172) is slidably connected to the inner side of the cylinder (171). A blocking component is provided on the mobile vehicle (1) for blocking and sealing the annular airbag (17).

7. A dam body crack detection device for water conservancy projects according to claim 6, characterized in that: The blocking assembly includes a closing plate (174) connected to the mobile vehicle (1) in a transverse sliding manner, the closing plate (174) is fixedly connected to the end of the piston rod (172), and a screw rod (175) is rotatably connected to the mobile vehicle (1) and is threadedly connected to the closing plate (174).

8. The dam body crack detection device for water conservancy projects according to claim 1 is characterized in that: The dam body gap detection device for water conservancy projects further comprises a lighting lamp (18) installed at the bottom of the mobile vehicle (1) for illuminating the gap position.

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