A cleaning device for the outer surface of the steel casing inside the cofferdam

Abstract

The present invention discloses a cleaning device for the outer surface of a steel casing within a cofferdam, which relates to the technical field of cofferdam construction. It includes a concentrically arranged active outer ring and a driven inner ring. The driven inner ring includes an inner connecting ring, and a plurality of cleaning heads are arranged on the inner wall of the inner connecting ring; the active outer ring includes a lifting ring, and a rotating ring is concentrically and rotatably arranged within the lifting ring; a plurality of fan blades are arranged on the inner wall of the rotating ring. When the rotating ring moves up and down in water along with the lifting ring, the rotating ring and the inner connecting ring can be driven to rotate synchronously by the thrust of the water flow on the fan blades.

Description

Technical Field

[0001] The present invention relates to the technical field of cofferdam construction, and more specifically, to a cleaning device for the outer surface of a steel casing inside a cofferdam. Background Art

[0002] During the construction of cross-river or cross-stream bridges, it is usually necessary to set up sheet pile cofferdams, double-wall steel cofferdams or steel pipe column cofferdams, etc. as water and soil retaining structures to provide a water-free working environment for bridge foundation construction.

[0003] When the underwater excavation of the cofferdam reaches the designed depth, it is necessary to pour underwater sealing concrete. Through the bonding force between the sealing concrete and the inner wall of the cofferdam and the steel casing, the water pressure at the base and the buoyancy of the cofferdam after pumping are resisted. Since it is difficult to thoroughly clean the muck during the underwater excavation process, the outer surface of the steel casing is often covered with impurities such as soil, which affects the bonding force between the concrete and the steel casing, resulting in a reduction in the overall anti-buoyancy of the cofferdam.

[0004] The existing technical solution is to arrange divers to dive to the bottom of the water to manually clean the soil on the outer surface of the steel casing. This method is likely to cause difficult-to-reach local positions, and the cost is relatively high, with certain safety risks. Summary of the Invention

[0005] Aiming at the defects existing in the prior art, the purpose of the present invention is to provide a cleaning device for the outer surface of a steel casing inside a cofferdam. When the cleaning device moves up and down in the water, it can utilize the thrust of the water on the fan blades to drive the entire cleaning mechanism to rotate, and when cleaning the outer surface of the steel casing of the cofferdam, it can achieve the effect of the cleaning device rotating while moving up and down, thereby effectively improving the cleaning effect of the cleaning device on the outer surface of the steel casing of the cofferdam.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: a cleaning device for the outer surface of a steel casing inside a cofferdam, including a concentrically arranged active outer ring and a driven inner ring. The driven inner ring includes an inner connecting ring, and a plurality of cleaning heads are arranged on the inner wall of the inner connecting ring. The active outer ring includes a lifting ring, and a rotating ring is concentrically and rotatably arranged inside the lifting ring. A plurality of fan blades are arranged on the inner wall of the rotating ring. When the rotating ring moves up and down in the water along with the lifting ring, the thrust of the water flow on the fan blades can be utilized to drive the rotating ring and the inner connecting ring to rotate synchronously.

[0007] On the basis of the above technical solution, all the fan blades are inclined in the same direction around the driven inner ring.

[0008] On the basis of the above technical solution, lifting lugs are arranged on the outer wall of the lifting ring.

[0009] On the basis of the above technical solution, it further includes an adjustment mechanism for adjusting the position of the cleaning head. The adjustment mechanism includes a number of guide cylinders, each guide cylinder is arranged around the inner connection ring and corresponds to the cleaning head one by one; a slider is slidably connected in the guide cylinder, and one end of the slider extends out of the guide cylinder and passes through the inner connection ring and then is connected to the cleaning head.

[0010] On the basis of the above technical solution, the adjustment mechanism further includes an adjustment inner ring, an adjustment outer ring, and an outer connection ring that are concentric with the inner connection ring; one end of the guide cylinder is connected to the outer wall of the inner connection ring, and the other end of the guide cylinder is connected to the inner wall of the outer connection ring; a chute is provided on the bottom surface of the guide cylinder; the top surface of the adjustment inner ring is rotatably connected to the inner connection ring, the top surface of the adjustment outer ring is rotatably connected to the outer connection ring, and a number of adjustment connecting rods are arranged between the adjustment inner ring and the adjustment outer ring; the adjustment connecting rods correspond to the guide cylinders one by one and are arranged at an angle with the corresponding guide cylinders; an adjustment track is provided on the adjustment connecting rod, and an adjustment pin is slidably arranged in the adjustment track; the upper end of the adjustment pin extends into the chute and is connected to the slider.

[0011] On the basis of the above technical solution, the guide cylinder is radially parallel to the outer connection ring, and the angle between the adjustment connecting rod and the radial direction of the adjustment outer ring is 60°.

[0012] On the basis of the above technical solution, the inner diameter of the inner connection ring is the same as the inner diameter of the adjustment inner ring, and the inner diameter of the outer connection ring is the same as the inner diameter of the adjustment outer ring.

[0013] On the basis of the above technical solution, it further includes a locking mechanism for locking the cleaning head; the locking mechanism includes a fixed ring and a number of movable rods; the fixed ring is concentric with the adjustment outer ring; the outer diameter of the adjustment outer ring is greater than the outer diameter of the outer connection ring, each movable rod is arranged around the outer connection ring, and a positioning block for pressing against the top surface of the outer connection ring is provided at the upper end of the movable rod; the lower end of the movable rod passes through the adjustment outer ring and is connected to the fixed ring through a spring.

[0014] On the basis of the above technical solution, anti-slip lines are provided on the top surface of the outer connection ring, and anti-slip convex ribs adapted to the anti-slip lines are provided on the bottom surface of the positioning block.

[0015] On the basis of the above technical solution, the cleaning head is a brush made of steel wire.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The device has a simple structure, good cleaning effect, does not require external power drive, is simple and convenient to operate, reduces the use difficulty of the user when using the device, simplifies the cleaning work of the outer surface of the underwater steel casing, and improves the construction efficiency.

[0018] 2. During the cleaning process of the device, the brush head of the device is rotated by the water flow, achieving the effect of the cleaning device lifting and rotating simultaneously, effectively improving the cleaning effect of the cleaning device on the outer surface of the cofferdam steel casing.

[0019] 3. The device can conveniently adjust the distance between the brush head and the steel casing, and can be applicable to steel casings of different diameters. At the same time, through the adjustment of the distance, the brush head can be closely attached to the surface of the steel casing, improving the cleaning effect and the practicality of the device.

[0020] 4. Lifting lugs are arranged on the outer side of the device, and the device can be lifted by a crane and lowered by its own weight, avoiding manual underwater construction and improving construction safety. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the cleaning device for the outer surface of the steel casing inside the cofferdam in the embodiment of the present invention;

[0022] Figure 2 is a schematic structural diagram of the driven inner ring, adjustment mechanism and locking mechanism in the embodiment of the present invention;

[0023] Figure 3 is a schematic structural diagram of the driven inner ring, adjustment mechanism and locking mechanism from another perspective in the embodiment of the present invention;

[0024] Figure 4 is an enlarged schematic diagram of the adjustment mechanism in the embodiment of the present invention;

[0025] Figure 5 is an enlarged schematic diagram of the locking mechanism in the embodiment of the present invention.

[0026] Reference Signs:

[0027] 1 - Active outer ring; 11 - Hanging ring; 12 - Rotating ring; 13 - Fan blade; 14 - Lifting lug;

[0028] 2 - Driven inner ring; 21 - Inner connecting ring; 22 - Cleaning head;

[0029] 3 - Adjustment mechanism; 31 - Guide cylinder; 32 - Slide block; 33 - Outer connecting ring; 34 - Adjusting inner ring; 35 - Adjusting outer ring; 36 - Adjusting connecting rod; 37 - Adjusting track; 38 - Adjusting pin; 39 - Chute;

[0030] 4 - Locking mechanism; 41 - Fixed ring; 42 - Movable rod; 43 - Positioning block; 44 - Spring; 45 - Anti-slip convex rib; 46 - Anti-slip pattern. Detailed Embodiment

[0031] Embodiments of the present invention will be described in detail below. The embodiments are illustrated in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0032] In the description of the present invention, it should be noted that for orientation terms, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationships indicated are based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present invention.

[0033] The technical solutions and their beneficial effects of the present invention will be made clearer and more definite by further describing the specific embodiments of the present invention in conjunction with the drawings of the specification. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0034] See Figures 1 to 3 As shown, an outer surface cleaning device for a steel casing inside a cofferdam according to an embodiment of the present invention includes a concentrically arranged active outer ring 1 and a driven inner ring 2. The driven inner ring 2 includes an inner connection ring 21, and a plurality of cleaning heads 22 are provided on the inner wall of the inner connection ring 21; specifically, the cleaning heads 22 are wire brushes.

[0035] See Figure 1 As shown, the active outer ring 1 includes a suspension ring 11, and a rotating ring 12 is concentrically and rotatably arranged inside the suspension ring 11; a plurality of fan blades 13 are provided on the inner wall of the rotating ring 12. When the rotating ring 12 moves up and down in water along with the suspension ring 11, the thrust of the water flow on the fan blades 13 can be used to push the rotating ring 12 and the inner connection ring 21 to rotate synchronously. Specifically, all the fan blades 13 are inclined in the same direction around the driven inner ring 2. A lifting lug 14 is provided on the outer wall of the suspension ring 11. During the ascending process, by fixing a steel wire rope on the lifting lug 14, a hoisting device is used to lift the cleaning device, and during the descending process, the device descends freely by its own weight.

[0036] See Figure 4As shown, the cleaning device for the outer surface of the steel casing inside the cofferdam further includes an adjustment mechanism 3 for adjusting the position of the cleaning head 22. The adjustment mechanism 3 includes a number of guide cylinders 31. Each guide cylinder 31 is arranged around the inner connection ring 21 and corresponds to the cleaning head 22 one by one. A slider 32 is slidably connected inside the guide cylinder 31. One end of the slider 32 extends out of the guide cylinder 31, penetrates through the inner connection ring 21 and is connected to the cleaning head 22. As the slider slides and expands and contracts along the guide cylinder, the position of the cleaning head can be adjusted, which can be applicable to steel casings of different sizes. At the same time, it is convenient to adjust the distance between the brush head and the steel casing, improving the practicability of this cleaning device. Specifically, the adjustment mechanism 3 further includes an adjustment inner ring 34, an adjustment outer ring 35, and an outer connection ring 33 that are concentric with the inner connection ring 21. One end of the guide cylinder 31 is connected to the outer wall of the inner connection ring 21, and the other end of the guide cylinder 31 is connected to the inner wall of the outer connection ring 33. A chute 39 is opened on the bottom surface of the guide cylinder 31. The top surface of the adjustment inner ring 34 is rotatably connected to the inner connection ring 21, the top surface of the adjustment outer ring 35 is rotatably connected to the outer connection ring 33, the outer wall of the adjustment outer ring 35 is fixedly connected to the fan blade 13, and a number of adjustment connecting rods 36 are arranged between the adjustment inner ring 34 and the adjustment outer ring 35. The adjustment connecting rods 36 correspond to the guide cylinders 31 one by one and are arranged at an angle with the corresponding guide cylinders 31. An adjustment track 37 is arranged on the adjustment connecting rod 36, and an adjustment pin 38 is slidably arranged inside the adjustment track 37. The upper end of the adjustment pin 38 extends into the chute 39 and is connected to the slider 32. The guide cylinder 31 is radially parallel to the outer connection ring 33, and the angle between the adjustment connecting rod 36 and the radial direction of the adjustment outer ring 35 is 60°. The inner diameter of the inner connection ring 21 is the same as the inner diameter of the adjustment inner ring 34, and the inner diameter of the outer connection ring 33 is the same as the inner diameter of the adjustment outer ring 35. Through the setting of the adjustment track 37, when the adjustment outer ring 35 is rotated, the adjustment outer ring 35 drives the adjustment track and the adjustment inner ring 34 to rotate simultaneously. As the adjustment track 37 rotates, the position of the adjustment pin 38 is adjusted, and finally the telescopic adjustment of the slider 32 is realized.

[0037] See Figure 5As shown in the figure, the cleaning device for the outer surface of the steel casing inside the cofferdam further includes a locking mechanism 4 for locking the cleaning head 22; the locking mechanism 4 includes a fixed ring 41 and a plurality of movable rods 42; the fixed ring 41 is concentrically arranged with the adjusting outer ring 35; the outer diameter of the adjusting outer ring 35 is larger than the outer diameter of the outer connecting ring 33, and each movable rod 42 is arranged around the outer connecting ring 33, and a positioning block 43 for pressing against the top surface of the outer connecting ring 33 is arranged at the upper end of the movable rod 42; the lower end of the movable rod 42 passes through the adjusting outer ring 35 and is connected to the fixed ring 41 through a spring 44. Through the setting of the spring, the fixed ring is pushed downward, thereby driving the movable rod and the positioning block to press downward, pressing the positioning block against the top surface of the outer connecting ring, and realizing the positioning and fixing between the outer connecting ring and the adjusting outer ring. The top surface of the outer connecting ring 33 is provided with anti-slip lines 46, and the bottom surface of the positioning block 43 is provided with anti-slip ridges 45 adapted to the anti-slip lines 46, so as to improve the positioning effect between the positioning block and the outer connecting ring.

[0038] The working principle of the present invention is as follows:

[0039] A lifting ring is rotatably connected to the outer wall of the rotating ring through a bearing, and integral lifting lugs are fixedly connected to both outer walls of the lifting ring, and an external lifting device is connected to the lifting lugs, so as to drive the entire cleaning device to lift and lower in the water. When the cleaning device lifts and lowers in the water, the thrust of the water flow on the fan blades can be utilized, thereby driving the entire cleaning mechanism to rotate. When cleaning the outer surface of the cofferdam steel casing, the effect of the cleaning device lifting and rotating simultaneously can be realized, thereby effectively improving the cleaning effect of the cleaning device on the outer surface of the cofferdam steel casing.

[0040] In order to be applicable to the cleaning work of the outer surfaces of cofferdam steel casings of different specifications, when adjusting the position of the cleaning head, only need to lift the fixed ring to separate the positioning block from the outer connecting ring, and then rotate the fixed ring. The fixed ring drives the adjusting outer ring to rotate relative to the outer connecting ring through the movable rod. Due to the structural design between the adjusting track and the adjusting pin, the position of the adjusting pin is adjusted, thereby driving the slider to stretch along the guiding cylinder, so that the cleaning head is attached to the outer wall of the cofferdam steel casing. The operation is simple and convenient. Synchronous adjustment of all cleaning heads can be realized only by rotating the fixed ring, which not only effectively improves the practicability of the cleaning device, but also reduces the usage difficulty of the user.

[0041] In the description of the specification, the description with reference to terms such as "one embodiment", "preferably", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. The schematic expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0042] The present invention is not limited to the above embodiments. For those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also considered within the protection scope of the present invention. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. A cleaning device for the outer surface of a steel casing inside a cofferdam, comprising an active outer ring (1) and a driven inner ring (2) arranged concentrically, characterized in that: The driven inner ring (2) includes an inner connecting ring (21), and a plurality of cleaning heads (22) are arranged on the inner wall of the inner connecting ring (21); The driving outer ring (1) includes a lifting ring (11), and a rotating ring (12) is concentrically and rotatably arranged in the lifting ring (11); a plurality of fan blades (13) are arranged on the inner wall of the rotating ring (12). When the rotating ring (12) moves up and down in water along with the lifting ring (11), the rotating ring (12) and the inner connecting ring (21) can be driven to rotate synchronously by using the thrust of the water flow on the fan blades (13); It further includes an adjusting mechanism (3) for adjusting the position of the cleaning head (22). The adjusting mechanism (3) includes a plurality of guide cylinders (31), and each guide cylinder (31) is arranged around the inner connecting ring (21) and corresponds to the cleaning head (22) one by one; a slider (32) is slidably connected in the guide cylinder (31), and one end of the slider (32) extends out of the guide cylinder (31) and penetrates through the inner connecting ring (21) and then is connected to the cleaning head (22); The adjusting mechanism (3) further includes an adjusting inner ring (34), an adjusting outer ring (35), and an outer connecting ring (33) that are concentrically arranged with the inner connecting ring (21); one end of the guide cylinder (31) is connected to the outer wall of the inner connecting ring (21), and the other end of the guide cylinder (31) is connected to the inner wall of the outer connecting ring (33); a chute (39) is formed on the bottom surface of the guide cylinder (31); the top surface of the adjusting inner ring (34) is rotatably connected to the inner connecting ring (21), the top surface of the adjusting outer ring (35) is rotatably connected to the outer connecting ring (33), and a plurality of adjusting connecting rods (36) are arranged between the adjusting inner ring (34) and the adjusting outer ring (35); the adjusting connecting rods (36) correspond to the guide cylinders (31) one by one and are arranged at an angle with the corresponding guide cylinders (31); an adjusting track (37) is arranged on the adjusting connecting rod (36), and an adjusting pin (38) is slidably arranged in the adjusting track (37); the upper end of the adjusting pin (38) extends into the chute (39) and then is connected to the slider (32); It further includes a locking mechanism (4) for locking the cleaning head (22); the locking mechanism (4) includes a fixing ring (41) and a plurality of movable rods (42); the fixing ring (41) is concentrically arranged with the adjusting outer ring (35); the outer diameter of the adjusting outer ring (35) is larger than the outer diameter of the outer connecting ring (33), and each movable rod (42) is arranged around the outer connecting ring (33), and a positioning block (43) for pressing against the top surface of the outer connecting ring (33) is arranged at the upper end of the movable rod (42); the lower end of the movable rod (42) penetrates through the adjusting outer ring (35) and then is connected to the fixing ring (41) through a spring (44).

2. The cleaning device for the outer surface of the steel casing inside the cofferdam according to claim 1, wherein: All the fan blades (13) are inclined in the same direction around the driven inner ring (2).

3. The cleaning device for the outer surface of the steel casing inside the cofferdam according to claim 1, characterized in that: A lifting lug (14) is arranged on the outer wall of the lifting ring (11).

4. The cleaning device for the outer surface of the steel casing inside the cofferdam according to claim 1, wherein: The guide cylinder (31) is radially parallel to the outer connecting ring (33), and the angle between the adjusting connecting rod (36) and the radius of the adjusting outer ring (35) is 60°.

5. The cleaning device for the outer surface of the steel casing inside the cofferdam according to claim 1, wherein: The inner diameter of the inner connection ring (21) is the same as that of the adjusting inner ring (34), and the inner diameter of the outer connection ring (33) is the same as that of the adjusting outer ring (35).

6. The cleaning device for the outer surface of the steel casing inside the cofferdam according to claim 1, wherein: Anti-slip lines (46) are provided on the top surface of the outer connection ring (33), and anti-slip ridges (45) adapted to the anti-slip lines (46) are provided on the bottom surface of the positioning block (43).

7. The cleaning device for the outer surface of the steel casing inside the cofferdam according to claim 1, wherein: The cleaning head (22) is a wire brush made of wire.

Images