A steel sheet pile quality detection device based on canal bank protection cofferdam

Abstract

The present invention relates to the technical field of steel sheet pile quality inspection, and in particular to a steel sheet pile quality inspection device based on a canal revetment cofferdam. The present invention provides a steel sheet pile quality inspection device based on a canal revetment cofferdam that can perform stretching, knocking, and simulated water wave impact tests on steel sheet piles, thereby facilitating a comprehensive assessment of the quality of the steel sheet piles. A steel sheet pile quality inspection device based on a canal revetment cofferdam comprises a connecting support frame and a first dual-axis motor, etc., wherein a plurality of steel sheet piles are provided, and two adjacent steel sheet piles are interlocked with each other, and the steel sheet piles are all located inside the connecting support frame, and the first dual-axis motor is connected to the front lower part of the connecting support frame. The present invention performs a knocking test on the steel sheet piles through a knocking mechanism, performs a stretching test through a stretching mechanism, and then simulates water waves rushing towards the steel sheet piles for testing through a toggle mechanism, thereby achieving the effect of being able to perform stretching, knocking, and simulated water wave impact tests on the steel sheet piles, thereby facilitating a comprehensive assessment of the quality of the steel sheet piles.

Description

Technical Field

[0001] The present invention relates to the technical field of steel sheet pile quality detection, and in particular to a steel sheet pile quality detection device based on a canal bank protection cofferdam. Background Art

[0002] As an important retaining material, steel sheet piles are widely used in canal revetment and cofferdam projects due to their high strength, excellent water-stopping properties, and reusability. In typical canal projects, U-shaped steel sheet piles are connected by interlocking joints to form a continuous retaining wall. Their quality directly affects the project's stability, anti-seepage effectiveness, and service life. Therefore, quality inspection of steel sheet piles is essential. Visual inspection or numerical measurement is typically used to verify quality.

[0003] Since steel sheet piles are usually located in water when in use, the underwater environment is relatively complex. The existing detection methods are not effective during detection. In addition, there is pressure in the water that presses on the steel sheet piles, causing leakage at the joints between the steel sheet piles. In addition, water in the natural environment will generate waves that impact the steel sheet piles, causing resonance in the steel sheet piles, making it difficult to detect potential quality problems of the steel sheet piles. Summary of the Invention

[0004] In order to overcome the shortcomings of existing detection methods, such as poor detection effect during detection, pressure in the water body pressing on the steel sheet piles, which makes the joints between the steel sheet piles prone to leakage, and waves generated by the water body in the natural environment impacting the steel sheet piles, causing resonance in the steel sheet piles, and making it difficult to detect potential quality problems of the steel sheet piles, the present invention provides a steel sheet pile quality detection device based on the canal revetment cofferdam, which can perform stretching, knocking and simulated water wave impact tests on steel sheet piles, so as to facilitate a comprehensive evaluation of the quality of the steel sheet piles.

[0005] The technical solution is: a steel sheet pile quality detection device based on canal bank protection cofferdam, including a connecting support frame, a first double-axis motor, a screw, a sealing assembly, a stretching mechanism, a knocking mechanism and a toggle mechanism. There are multiple steel sheet piles, and two adjacent steel sheet piles are interlocked. The steel sheet piles are all located inside the connecting support frame. The front lower part of the connecting support frame is connected to the first double-axis motor, the first double-axis motor and the processor are electrically connected through a control module, and the left and right output shafts of the first double-axis motor are connected with screws. The lower part of the connecting support frame is provided with a sealing assembly that can facilitate drainage, the middle part of the connecting support frame is provided with a stretching mechanism that can stretch the steel sheet piles outward to both sides, the upper part of the connecting support frame is provided with a knocking mechanism that can repeatedly knock the steel sheet piles for testing, and the upper right part of the connecting support frame is provided with a toggle mechanism that can simulate water waves rushing towards the steel sheet piles.

[0006] Further explanation: the sealing assembly includes a first base plate and a second base plate. The first base plate is threadedly connected to the left screw rod, and the second base plate is threadedly connected to the right screw rod. The second base plate and the first base plate are both slidably connected to the connecting support frame.

[0007] To further illustrate, notches are provided on both the left and right parts of the first bottom plate and the second bottom plate, and two adjacent notches form a U-shaped groove.

[0008] Further explanation: the knocking mechanism includes a sliding seat, a second dual-axis motor, a second spring, a rotating column, a guide knocking frame, a third spring, a movable connecting frame and a fourth spring. The upper part of the connecting support frame is slidably connected to the front and rear sliding seats, the upper sides of the sliding seats are connected to the second dual-axis motor, the second dual-axis motor and the processor are electrically connected through the control module, the sliding seats are connected to the connecting support frame with the front and rear second springs, a rotating column is connected between the output shafts of the second dual-axis motor on the side close to each other, the front and rear parts of the rotating column are both slidably connected to the guide knocking frame, the guide knocking frame is connected to the rotating column with the third spring, the front and rear parts of the connecting support frame are both slidably connected to the movable connecting frame, the movable connecting frame is rotatably connected to the rotating column, and the movable connecting frame is connected to the connecting support frame with the fourth spring.

[0009] Further explanation: it also includes a stretching mechanism, which includes a slot frame, a stretching assembly and a cam. The front and rear parts of the connecting support frame are both slidably connected to the slot frame, and the slot frames are clamped with adjacent steel sheet piles. The front and rear parts of the connecting support frame are both provided with a stretching assembly, and cams are connected to the output shafts of the dual-axis motors on the side away from each other.

[0010] Further explanation: the stretching assembly includes a connecting plate, a fixed inclined plate frame, a trigger movable frame and a first spring. The connecting support frame is slidably connected to two front and rear connecting plates, and the connecting plates are detachably connected to adjacent slot frames. The upper and lower sides of the connecting plate that are away from each other are connected to the fixed inclined plate frame, and the middle part of the connecting support frame is slidably connected to two front and rear trigger movable frames, and multiple first springs are connected between the trigger movable frames and the adjacent connecting support frames.

[0011] Further explanation, it also includes a toggle mechanism, which includes a fixed connecting frame, a rotating plate, a one-way valve, a connecting pipe and a cylinder. The upper right part of the connecting support frame is detachably connected to the fixed connecting frame, the left side of the fixed connecting frame is rotatably connected to the rotating plate, the front and rear parts of the rotating plate are both connected to the one-way valves, a connecting pipe is connected between the one-way valves, the upper part of the fixed connecting frame is rotatably connected to the cylinder, the cylinder and the processor are electrically connected through a control module, a connecting piece is provided on the telescopic end of the cylinder, and the connecting piece is rotatably connected to the rotating plate.

[0012] Further explanation: it also includes a monitoring component, which includes a fixing frame and a visual inspection head. The upper side of the connecting support frame is connected to the left and right fixing frames, and the sides of the fixing frames close to each other are connected to the visual inspection heads.

[0013] Further explanation, it also includes a positioning mechanism, which includes an opening and closing plate, a connecting and fixing plate and a torsion spring. The upper part of the fixing frame is rotatably connected to the opening and closing plate, and the front and rear parts of the opening and closing plate on the right are connected to the connecting and fixing plate. The front and rear parts of the opening and closing plate are connected to the adjacent fixing frames with torsion springs.

[0014] The beneficial effects of the present invention are as follows: 1. The present invention performs a knocking test on the steel sheet piles through a knocking mechanism, performs a stretching test through a stretching mechanism, and then simulates water waves rushing towards the steel sheet piles for testing through a toggle mechanism, thereby achieving the effect of being able to stretch, knock and simulate water wave impact tests on the steel sheet piles, thereby facilitating a comprehensive evaluation of the quality of the steel sheet piles.

[0015] 2. The present invention rotates the rotating column to rotate the guide knocking frame to knock the steel sheet pile, so that the guide knocking frame is squeezed and moved, causing the steel sheet pile to resonate, thereby achieving the effect of being able to perform repeated knocking tests on the steel sheet pile, thereby facilitating the detection of the sealing performance of the steel sheet pile.

[0016] 3. The present invention uses a cam to squeeze and trigger the movable frame to move downward. When the movable frame is triggered to move downward, it squeezes the fixed inclined plate frame, drives the fixed inclined plate frame to move outward, causes the trough frame to move outward, drives the trough frame to move outward, causes the steel sheet piles to be stretched outward, and achieves the effect of being able to perform a tensile test on the steel sheet piles, which is convenient for detecting the sealing and structural strength of the steel sheet pile connection after deformation.

[0017] 4. The present invention starts the cylinder to extend and retract the telescopic end of the cylinder, driving the rotating plate to rotate on the fixed connecting frame. The rotating plate swings back and forth to push the water waves, causing the water waves to rush towards the steel sheet piles, simulating the deformation of the steel sheet piles under long-term water wave erosion. This achieves the effect of simulating water waves rushing towards the steel sheet piles, making it easier to detect the deformation of the steel sheet piles under long-term water wave erosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 This is a schematic diagram of a first partial three-dimensional structure of the present invention.

[0020] Figure 3 This is a schematic diagram of a second partial three-dimensional structure of the present invention.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the sealing component of the present invention.

[0022] Figure 5 It is an enlarged view of the three-dimensional structure of the positioning mechanism of the present invention.

[0023] Figure 6 For the present invention Figure 5 Enlarged view of the three-dimensional structure at point A in the middle.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the stretching assembly of the present invention.

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the positioning mechanism and monitoring component of the present invention.

[0026] Figure 9 It is a schematic diagram of the three-dimensional structure of the present invention.

[0027] Figure 10 For the present invention Figure 9 Enlarged view of the three-dimensional structure at point B in the middle.

[0028] Figure 11 It is a schematic diagram of the three-dimensional structure of the toggle mechanism of the present invention.

[0029] Markings in the accompanying drawings: 0, steel sheet pile; 1, connecting support frame; 2, first double-axis motor; 3, screw rod; 4, sealing assembly; 40, first base plate; 41, second base plate; 5, groove frame; 6, stretching assembly; 60, connecting plate; 61, fixed inclined plate frame; 62, trigger moving frame; 63, first spring; 7, monitoring assembly; 70, fixed frame; 71, visual inspection head; 8, positioning mechanism; 80, opening and closing plate; 81, connecting fixed plate; 83, torsion spring; 9, sliding seat; 10, second double-axis motor; 11, second spring; 12, cam; 13, rotating column; 14, guide knocking frame; 15, third spring; 16, moving connecting frame; 17, fourth spring; 18, fixed connecting frame; 19, rotating plate; 20, one-way valve; 21, connecting pipe; 22, cylinder. DETAILED DESCRIPTION

[0030] The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which presently preferred embodiments of the invention are shown. However, the invention can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness, and will fully convey the scope of the invention to those skilled in the art.

[0031] A steel sheet pile quality detection device based on canal bank protection cofferdam, such as Figures 1-11As shown, it includes a connecting support frame 1, a first dual-axis motor 2, a screw 3, a sealing assembly 4, a stretching mechanism, a knocking mechanism and a toggle mechanism. Three steel sheet piles 0 are provided, and two adjacent steel sheet piles 0 are interlocked. The steel sheet piles 0 are all located inside the connecting support frame 1. The front lower part of the connecting support frame 1 is connected to the first dual-axis motor 2, and the first dual-axis motor 2 and the processor are electrically connected through the control module. The left and right output shafts of the first dual-axis motor 2 are both connected with a screw 3. The lower part of the connecting support frame 1 is provided with a sealing assembly 4, the middle part of the connecting support frame 1 is provided with a stretching mechanism, the upper part of the connecting support frame 1 is provided with a knocking mechanism, and the upper right part of the connecting support frame 1 is provided with a toggle mechanism.

[0032] The sealing assembly 4 includes a first base plate 40 and a second base plate 41. The first base plate 40 is threadedly connected to the left screw rod 3, and the second base plate 41 is threadedly connected to the right screw rod 3. The second base plate 41 and the first base plate 40 are both slidably connected to the connecting support frame 1. Notches are opened on the left and right sides of the first base plate 40 and the second base plate 41, and two adjacent notches form a U-shaped groove.

[0033] The knocking mechanism includes a sliding seat 9, a second dual-axis motor 10, a second spring 11, a rotating column 13, a guide knocking frame 14, a third spring 15, a mobile connecting frame 16 and a fourth spring 17. The upper part of the connecting support frame 1 is slidably connected to the front and rear sliding seats 9, and the upper side of the sliding seat 9 is connected to the second dual-axis motor 10. The second dual-axis motor 10 and the processor are electrically connected through the control module. The sliding seats 9 are connected to the front and rear second springs 11 between the connecting support frame 1, and the rotating column 13 is connected between the output shafts of the second dual-axis motor 10 on the side close to each other. The front and rear parts of the rotating column 13 are both slidably connected to the guide knocking frame 14, and the guide knocking frame 14 is connected to the third spring 15 between the rotating column 13. The front and rear parts of the connecting support frame 1 are both slidably connected to the mobile connecting frame 16. The mobile connecting frame 16 is rotatably connected to the rotating column 13, and the mobile connecting frame 16 is connected to the connecting support frame 1 with the fourth spring 17.

[0034] It also includes a stretching mechanism, which includes a slot frame 5, a stretching component 6 and a cam 12. The front and rear parts of the connecting support frame 1 are both slidably connected to the slot frame 5, and the slot frames 5 are both clamped with adjacent steel sheet piles 0. The front and rear parts of the connecting support frame 1 are both provided with a stretching component 6, and the output shafts of the dual-axis motors on the sides away from each other are connected to the cams 12.

[0035] The stretching assembly 6 includes a connecting plate 60, a fixed inclined plate frame 61, a trigger movable frame 62 and a first spring 63. The front and rear connecting plates 60 are slidably connected to the connecting support frame 1. The connecting plates 60 are detachably connected to the adjacent slot frames 5. The upper and lower sides of the connecting plate 60 that are away from each other are connected to the fixed inclined plate frame 61. The middle part of the connecting support frame 1 is slidably connected to the front and rear trigger movable frames 62. Four first springs 63 are connected between the trigger movable frames 62 and the adjacent connecting support frames 1.

[0036] When using the present invention, first place the connecting support frame 1 in the quality inspection area of ​​the steel sheet pile 0, then assemble and clamp the three steel sheet piles 0, and then insert the steel sheet pile 0 between the slot frames 5, so that the steel sheet pile 0 contacts the first bottom plate 40 and the second bottom plate 41, and then discharge the river water into the space between the steel sheet pile 0 and the right part of the connecting support frame 1. Then the processor starts the second dual-axis motor 10 through the control module to drive the rotating column 13 to rotate, so that the guide knocking frame 14 rotates and knocks the steel sheet pile 0, so that the guide knocking frame 14 is squeezed and moves, and the third spring 15 is squeezed and contracted, so that the steel sheet pile 0 resonates. If there are small cracks on the steel sheet pile 0 or there is a gap at the connection between two adjacent steel sheet piles 0, the river water will penetrate through the small cracks or connections to the other side of the steel sheet pile 0, so that the steel sheet pile 0 can be repeatedly knocked to test the sealing performance of the steel sheet pile 0. When the rotating column 13 continues to rotate so that the guide knocking frame 14 no longer contacts the steel sheet pile 0, the third spring 15 is compressed and contracted. When the cam 12 continues to rotate and no longer contacts the trigger moving frame 62, the first spring 63 is restored, driving the trigger moving frame 62 to move upward and reset, pushing the fixed inclined plate frame 61, and driving the fixed inclined plate frame 61 to move inward;

[0037] It also includes a toggle mechanism, which includes a fixed connecting frame 18, a rotating plate 19, a one-way valve 20, a connecting pipe 21 and a cylinder 22. The upper right part of the connecting support frame 1 is detachably connected to the fixed connecting frame 18, the left side of the fixed connecting frame 18 is rotatably connected to the rotating plate 19, the front and rear parts of the rotating plate 19 are both connected to the one-way valve 20, a connecting pipe 21 is connected between the one-way valves 20, the upper part of the fixed connecting frame 18 is rotatably connected to the cylinder 22, the cylinder 22 and the processor are electrically connected through a control module, a connecting piece is provided on the telescopic end of the cylinder 22, and the connecting piece is rotatably connected to the rotating plate 19.

[0038] It also includes a monitoring component 7, which includes a fixing frame 70 and a visual inspection head 71. The left and right fixing frames 70 are connected to the upper side of the connecting support frame 1, and the visual inspection heads 71 ​​are connected to the sides of the fixing frames 70 that are close to each other.

[0039] It also includes a positioning mechanism 8, which includes an opening and closing plate 80, a connecting and fixing plate 81 and a torsion spring 83. The upper part of the fixed frame 70 is rotatably connected to the opening and closing plate 80, and the front and rear parts of the opening and closing plate 80 on the right are both connected to the connecting and fixing plate 81. The front and rear parts of the opening and closing plate 80 are both connected to the adjacent fixed frame 70 with a torsion spring 83.

[0040] When it is necessary to simulate water waves rushing towards the steel sheet pile 0, the cylinder 22 can be started to extend and retract the telescopic end of the cylinder 22, driving the rotating plate 19 to rotate on the fixed connecting frame 18, so that the cylinder 22 rotates between the rotating plate 19 and the fixed connecting frame 18, and the rotating plate 19 swings back and forth to push the water waves, so that the water waves rush towards the steel sheet pile 0, simulating the deformation of the steel sheet pile 0 under the long-term water wave scouring, thereby simulating the water waves rushing towards the steel sheet pile 0, which is convenient for detecting the deformation of the steel sheet pile 0 under the long-term water wave scouring. When the rotating plate 19 rotates to the right, the water is discharged from the connecting pipe 21 through the one-way valve 20 due to the resistance of the water, thereby reducing the resistance of the water and facilitating the rapid swinging back and forth of the rotating plate 19; before the steel sheet pile 0 is inserted between the slot frames 5, the visual inspection head 71 will first detect obvious rust and cracks on the surface of the steel sheet pile 0, and at the same time, the steel sheet pile 0 will press the opening and closing plate 80, driving the opening and closing plate 80 to rotate, and the torsion spring 83 will deform, through When the steel sheet pile 0 no longer contacts the opening and closing plate 80, the torsion spring 83 is restored, driving the opening and closing plate 80 and the connecting and fixing plate 81 to rotate and reset, the second spring 11 and the fourth spring 17 are restored, driving the sliding seat 9 and the moving connecting frame 16 to move and reset; after the detection is completed, the first dual-axis motor 2 is started to drive the screw rod 3 to rotate, so that the first bottom plate 40 and the second bottom plate 41 move outward under the action of the thread, so that water is discharged from the bottom of the connecting support frame 1.

[0041] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A steel sheet pile quality detection device based on canal bank protection cofferdam, characterized in that: The invention comprises a connecting support frame (1), a first double-axis motor (2), a screw (3), a sealing assembly (4), a stretching mechanism, a knocking mechanism and a toggle mechanism, a plurality of steel sheet piles (0) are provided, two adjacent steel sheet piles (0) are interlocked, and the steel sheet piles (0) are all located inside the connecting support frame (1), the front lower part of the connecting support frame (1) is connected to the first double-axis motor (2), the first double-axis motor (2) and the processor are electrically connected through a control module, the left and right output shafts of the first double-axis motor (2) are both connected to the screw (3), the lower part of the connecting support frame (1) is provided with a sealing assembly (4) capable of facilitating drainage, the middle part of the connecting support frame (1) is provided with a stretching mechanism capable of stretching the steel sheet piles (0) outward to both sides, and the upper part of the connecting support frame (1) is provided with a plurality of steel sheet piles (0), the ... upper part of the connecting support frame (1) is provided with a plurality of steel sheet piles (0), the upper part of the connecting support frame (1) is provided with a plurality of steel sheet piles (0), the upper part of the connecting support frame (1) is provided with a plurality A striking mechanism capable of repeatedly striking a steel sheet pile (0) is provided, and a toggle mechanism capable of simulating water waves rushing toward the steel sheet pile (0) is provided on the upper right portion of the connecting support frame (1). The striking mechanism comprises a sliding seat (9), a second double-axis motor (10), a second spring (11), a rotating column (13), a guide striking frame (14), a third spring (15), a movable connecting frame (16) and a fourth spring (17). The upper portion of the connecting support frame (1) is slidably connected to two front and rear sliding seats (9), and the upper side of the sliding seat (9) is connected to the second double-axis motor (10). The second double-axis motor (10) and the processor are electrically connected through a control module. The sliding seat (9) is connected to the connecting support frame (1) with two front and rear second springs (11). ), a rotating column (13) is connected between the output shafts of the second dual-axis motor (10) on one side close to each other, the front and rear parts of the rotating column (13) are both slidably connected to the guide knocking frame (14), and the guide knocking frame (14) is connected to the rotating column (13) with a third spring (15), the front and rear parts of the connecting support frame (1) are both slidably connected to the mobile connecting frame (16), the mobile connecting frame (16) is rotatably connected to the rotating column (13), and the mobile connecting frame (16) is connected to the connecting support frame (1) with a fourth spring (17), the toggle mechanism includes a fixed connecting frame (18), a rotating plate (19), a one-way valve (20), a connecting pipe (21) and a cylinder (22), the upper right part of the connecting support frame (1) is detachable A fixed connecting frame (18) is connected, and the left side of the fixed connecting frame (18) is rotatably connected to a rotating plate (19), and the front and rear parts of the rotating plate (19) are both connected to a one-way valve (20), and a connecting pipe (21) is connected between the one-way valve (20). The upper part of the fixed connecting frame (18) is rotatably connected to a cylinder (22), and the cylinder (22) and the processor are electrically connected through a control module. A connecting piece is provided on the telescopic end of the cylinder (22), and the connecting piece is rotatably connected to the rotating plate (19). The monitoring component (7) also includes a fixed frame (70) and a visual detection head (71), and also includes a positioning mechanism (8), and the positioning mechanism (8) includes an opening and closing plate (80), a connecting fixed plate (81) and a torsion spring (83).The upper portion of the fixed frame (70) is rotatably connected to an opening and closing plate (80), and the front and rear portions of the right opening and closing plate (80) are both connected to a connecting fixed plate (81), and the front and rear portions of the opening and closing plate (80) are both connected to the adjacent fixed frame (70) with a torsion spring (83).

2. A steel sheet pile quality detection device based on canal bank protection cofferdam according to claim 1, characterized in that: The sealing assembly (4) comprises a first base plate (40) and a second base plate (41); the first base plate (40) is threadedly connected to the left screw rod (3); the second base plate (41) is threadedly connected to the right screw rod (3); and the second base plate (41) and the first base plate (40) are both slidably connected to the connecting support frame (1).

3. A steel sheet pile quality detection device based on canal bank protection cofferdam according to claim 2, characterized in that: The first bottom plate (40) and the second bottom plate (41) are both provided with notches on the left and right sides, and two adjacent notches form a U-shaped groove.

4. The steel sheet pile quality detection device based on canal bank protection cofferdam according to claim 1 is characterized in that: The invention also includes a stretching mechanism, which includes a slot frame (5), a stretching assembly (6) and a cam (12). The front and rear parts of the connecting support frame (1) are both slidably connected to the slot frame (5). The slot frame (5) is clamped with the adjacent steel sheet pile (0). The front and rear parts of the connecting support frame (1) are both provided with a stretching assembly (6). The output shafts of the dual-axis motors on the sides away from each other are both connected to the cam (12).

5. The steel sheet pile quality detection device based on canal bank protection cofferdam according to claim 4 is characterized in that: The stretching assembly (6) includes a connecting plate (60), a fixed inclined plate frame (61), a trigger movable frame (62) and a first spring (63). The connecting support frame (1) is slidably connected to two front and rear connecting plates (60). The connecting plates (60) are detachably connected to adjacent slot frames (5). The upper and lower sides of the connecting plate (60) are both connected to the fixed inclined plate frame (61) away from each other. The middle part of the connecting support frame (1) is slidably connected to two front and rear trigger movable frames (62). A plurality of first springs (63) are connected between the trigger movable frames (62) and the adjacent connecting support frames (1).

6. The steel sheet pile quality detection device based on canal bank protection cofferdam according to claim 1 is characterized in that: The upper side of the connecting support frame (1) is connected to two left and right fixing frames (70), and the sides of the fixing frames (70) close to each other are both connected to a visual inspection head (71).

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