Dredging equipment for cofferdam construction

Abstract

This utility model discloses a dredging device for cofferdam construction, belonging to the field of dredging equipment. The device includes an impact nozzle slidably mounted on the surface of a housing. The impact nozzle is connected to the output end of a high-pressure pump via a connecting pipe. The high-pressure pump and impact nozzle can spray water with a certain impact force to impact the sand layer, disrupting its structure and cutting it into smaller pieces for easier suction by a cutter pump. Simultaneously, it suspends sand particles in the water, forming mud. Because the sand particles in the mud are encapsulated by water, direct contact with the cutter pump surface is reduced, thus lowering the abrasion rate. An adjustment frame and a fixing frame are installed between the impact nozzle and the housing, allowing the impact nozzle to move up and down on the housing surface and change its impact direction and angle. The position of the impact nozzle can be automatically adjusted according to the sand layer at different locations inside the cofferdam, ensuring that the water sprayed by the impact nozzle can disrupt the sand layer structure, thus guaranteeing dredging quality and extending the service life of the cutter pump.

Description

Technical Field

[0001] This utility model relates to the field of dredging equipment, and in particular to dredging equipment for cofferdam construction. Background Technology

[0002] A cofferdam is a temporary water-retaining or soil-retaining structure, mainly used in water conservancy projects, building construction, river management, and other scenarios. It creates a dry or controllable construction environment by enclosing a specific area. Cofferdam dredging generally involves removing the silt and debris deposited inside the cofferdam to maintain the stability of the cofferdam structure, and usually requires the use of a cutter pump.

[0003] Existing cutter suction pumps generally consist of a submersible pump and two cutter heads, which are symmetrically arranged relative to the submersible pump. The cutter heads cut and shred impurities in the silt and transport them into the submersible pump. However, cutter suction pumps are difficult to use directly in cofferdams with sand layers. Sand layers are usually highly compacted, and the cutter suction pump may not be able to effectively pump during the suction process due to the excessive resistance of the sand layer. In addition, the flow of sand particles in the water increases the turbulence and eddies of the water flow, increasing the resistance encountered by the cutter suction pump during the suction process. At the same time, when sand particles come into contact with the surface of the cutter suction pump in the flowing water, it is difficult to avoid scratching the surface of the cutter suction pump, abrading the pump, and shortening its service life.

[0004] In summary, existing cutter suction pumps have several drawbacks when used in cofferdams with sand layers. The high density of the sand layer leads to excessive suction resistance, resulting in ineffective suction, and the sand particles abrade the pump body surface, shortening its service life. Utility Model Content

[0005] This utility model provides a dredging equipment for cofferdam construction, which can solve the problems in the prior art where the use of cutter suction pumps in cofferdams with sand layers results in excessive suction resistance due to the high density of the sand layer, which prevents effective suction, and the sand particles abrading the pump body surface and shortening its service life.

[0006] A cofferdam construction dredging equipment includes a housing for supporting the cutter head, and an impact mechanism is provided on the surface of the housing. The impact mechanism includes:

[0007] An impact nozzle is slidably mounted on the surface of a housing. A connecting pipe is fixedly connected to the input end of the impact nozzle. A support block is fixedly connected to the surface of the housing. A high-pressure pump is fixedly connected to the surface of the support block. The output end of the high-pressure pump is fixedly connected to the connecting pipe. The input end of the high-pressure pump is connected to a water source through a pipe.

[0008] An adjusting frame is slidably disposed on the surface of the housing. A moving component is provided between the adjusting frame and the housing. A fixed frame is slidably connected inside the adjusting frame. A limiting component is provided between the fixed frame and the adjusting frame to limit the position of the fixed frame. A rotating component is provided between the fixed frame and the impact nozzle to change the angle of the impact nozzle relative to the housing.

[0009] Optionally, the moving component includes a moving shaft fixedly mounted on the surface of the adjusting frame, and the housing surface is provided with a moving groove, the moving shaft being adapted to the moving groove.

[0010] Optionally, the cross-section of the moving shaft is T-shaped.

[0011] Optionally, a pull belt is fixedly connected to the surface of the movable shaft, and an operating rod is threadedly connected inside the housing. The end of the pull belt is fixedly connected to the operating rod, and the pull belt is wrapped around the surface of the operating rod.

[0012] Optionally, the limiting component includes a sliding rod slidably disposed inside the fixed frame. A plurality of limiting teeth are fixedly connected to the side of the sliding rod away from the impact nozzle. A sliding groove is provided on the surface of the adjusting frame. The sliding rod is adapted to the sliding groove. A plurality of positioning teeth are fixedly connected inside the sliding groove. The plurality of positioning teeth are spaced apart, and adjacent positioning teeth are adapted to the limiting teeth.

[0013] Optionally, a positioning spring is fixedly connected between the sliding rod and the fixed frame, and a pressing rod is internally threaded into the fixed frame, with the end of the pressing rod contacting the sliding rod.

[0014] Optionally, the rotating assembly includes a rotating shaft fixedly mounted on the surface of the impact nozzle, and the surface of the fixing frame is provided with a rotating groove, which is adapted to the rotating shaft.

[0015] Optionally, a plurality of rotating teeth are fixedly connected to the end of the rotating shaft, and a rotating column is slidably connected inside the fixing frame. A plurality of limiting teeth are fixedly connected to one end of the rotating column near the rotating shaft, and the limiting teeth and the rotating teeth are adapted to each other.

[0016] Optionally, a protruding post is fixedly connected to the surface of the rotating shaft, and the protruding post is adapted to the rotating groove.

[0017] Optionally, a through groove is provided on the surface of the housing, the connecting pipe passes through the through groove, and a guide ring is fixedly connected to the surface of the housing, the inner wall of the guide ring being slidably connected to the connecting pipe.

[0018] This utility model provides a dredging device for cofferdam construction, including an impact nozzle slidably mounted on the surface of a shell. The impact nozzle is connected to the output end of a high-pressure pump via a connecting pipe. The high-pressure pump can spray water with a certain impact force from the impact nozzle to impact the sand layer, destroying its structure and cutting it into small pieces for easy suction by a cutter pump. Simultaneously, it suspends sand particles in the water, forming mud. Because the sand particles in the mud are encapsulated by water, direct contact with the cutter pump surface is reduced, thus lowering the abrasion rate. An adjustment frame and a fixing frame are installed between the impact nozzle and the shell, allowing the impact nozzle to move up and down on the shell surface and change its impact direction and angle. The position of the impact nozzle can be adjusted autonomously according to the sand layer at different locations inside the cofferdam, ensuring that the water jet from the impact nozzle can destroy the sand layer structure. This ensures that the cutter pump can transport the destroyed sand particles while reducing direct contact between the sand particles and the cutter pump surface, thus guaranteeing dredging quality and the service life of the cutter pump. Attached Figure Description

[0019] Figure 1 A schematic diagram of the dredging equipment for cofferdam construction provided by this utility model;

[0020] Figure 2 Provided by this utility model Figure 1 Enlarged view of the local structure at point A;

[0021] Figure 3 Provided by this utility model Figure 1 Enlarged view of the local structure at point B;

[0022] Figure 4 An exploded three-dimensional view of the fixing frame provided by this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Shell;

[0025] 21. Impact nozzle; 22. Connecting pipe; 23. Support block; 24. High-pressure pump; 25. Adjusting frame; 26. Fixing frame;

[0026] 31. Moving shaft; 32. Moving groove; 33. Pull belt; 34. Operating lever;

[0027] 41. Sliding rod; 42. Limiting tooth; 43. Sliding groove; 44. Positioning tooth; 45. Positioning spring; 46. Pressing rod;

[0028] 51. Rotating shaft; 52. Rotating groove; 53. Rotating tooth; 54. Rotating column; 55. Limiting tooth; 56. Protruding column;

[0029] 61. Through groove; 62. Guide ring. Detailed Implementation

[0030] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0031] like Figures 1 to 4 As shown, the cofferdam construction dredging equipment provided in this embodiment of the utility model includes a housing 1 for supporting the cutter head position. An impact mechanism is provided on the surface of the housing 1, and the impact mechanism includes:

[0032] An impact nozzle 21 is slidably disposed on the surface of the housing 1. A connecting pipe 22 is fixedly connected to the input end of the impact nozzle 21. A support block 23 is fixedly connected to the surface of the housing 1. A high-pressure pump 24 is fixedly connected to the surface of the support block 23. The output end of the high-pressure pump 24 is fixedly connected to the connecting pipe 22. The input end of the high-pressure pump 24 is connected to a water source through a pipe.

[0033] An adjusting frame 25 is slidably disposed on the surface of the housing 1. A moving component is provided between the adjusting frame 25 and the housing 1. A fixed frame 26 is slidably connected inside the adjusting frame 25. A limiting component is provided between the fixed frame 26 and the adjusting frame 25 to limit the position of the fixed frame 26. A rotating component is provided between the fixed frame 26 and the impact nozzle 21 to change the angle of the impact nozzle 21 relative to the housing 1.

[0034] It should be noted that the high-pressure pump 24 is a device that can generate high-pressure liquid flow. Its core working principle is based on volumetric pressurization or centrifugal kinetic energy conversion, and it has strong pressure output capacity, working efficiency and the ability to adapt to diverse working conditions.

[0035] In summary, the cofferdam construction dredging equipment provided by this utility model embodiment includes an impact nozzle 21 slidably mounted on the surface of the shell 1. The impact nozzle 21 is connected to the output end of a high-pressure pump 24 via a connecting pipe 22. The high-pressure pump 24 can spray water with a certain impact force from the impact nozzle 21 to impact the sand layer, destroy the sand layer structure, cut the sand layer into small pieces, making it easier for the cutter pump to suck in. At the same time, it can suspend the sand particles in the water to form mud. The sand particles in the mud are encapsulated by water, reducing direct contact with the surface of the cutter pump, thereby reducing the abrasion rate. At the same time, an adjustment frame 25 and a fixing frame 26 are set between the impact nozzle 21 and the shell 1, so that the impact nozzle 21 can move up and down on the surface of the shell 1 and change the impact direction and impact angle. The position of the impact nozzle 21 can be adjusted autonomously according to the sand layer at different locations inside the cofferdam, ensuring that the water sprayed by the impact nozzle 21 can destroy the sand layer structure. It also ensures that the cutter pump can transport the destroyed sand particles during use and reduces the direct contact between the sand particles and the surface of the cutter pump, ensuring the dredging quality and the service life of the cutter pump.

[0036] In some specific implementations, the moving component includes a moving shaft 31 fixedly disposed on the surface of the adjusting frame 25, and a moving groove 32 is provided on the surface of the housing 1. The moving shaft 31 is adapted to the moving groove 32, and the cross-section of the moving shaft 31 is T-shaped. By adapting the T-shaped moving shaft 31 to the moving groove 32, the moving shaft 31 and the moving groove 32 are prevented from disengaging, thus ensuring that the adjusting frame 25 is on the surface of the housing 1.

[0037] In a further embodiment, a pull belt 33 is fixedly connected to the surface of the movable shaft 31, and an operating rod 34 is threadedly connected inside the housing 1. The end of the pull belt 33 is fixedly connected to the operating rod 34, and the pull belt 33 is wrapped around the surface of the operating rod 34. By rotating the operating rod 34, the length of the pull belt 33 can be changed, thereby improving the position of the adjusting frame 25 on the surface of the housing 1.

[0038] In some specific implementations, the limiting component includes a sliding rod 41 slidably disposed inside the fixed frame 26. A plurality of limiting teeth 42 are fixedly connected to the side of the sliding rod 41 away from the impact nozzle 21. A sliding groove 43 is provided on the surface of the adjusting frame 25. The sliding rod 41 is adapted to the sliding groove 43. A plurality of positioning teeth 44 are fixedly connected inside the sliding groove 43. The plurality of positioning teeth 44 are spaced apart, and adjacent positioning teeth 44 are adapted to the limiting teeth 42.

[0039] In a further embodiment, a positioning spring 45 is fixedly connected between the sliding rod 41 and the fixed frame 26. A pressing rod 46 is threadedly connected inside the fixed frame 26, and the end of the pressing rod 46 contacts the sliding rod 41. Rotating the pressing rod 46 can change the position of the pressing rod 46 inside the fixed frame 26, causing the positioning tooth 44 and the limiting tooth 42 to contact and fit together, thus restricting the sliding of the fixed frame 26 again. At the same time, the positioning spring 45 is provided so that when the pressing rod 46 disengages from the sliding rod 41, the limiting tooth 42 can quickly disengage from the positioning tooth 44.

[0040] In some specific embodiments, the rotating assembly includes a rotating shaft 51 fixedly disposed on the surface of the impact nozzle 21, a rotating groove 52 formed on the surface of the fixing frame 26, the rotating groove 52 being adapted to the rotating shaft 51; a plurality of rotating teeth 53 are fixedly connected to the end of the rotating shaft 51, a rotating column 54 is slidably connected inside the fixing frame 26, and a plurality of limiting teeth 55 are fixedly connected to one end of the rotating column 54 near the rotating shaft 51, the limiting teeth 55 being adapted to the rotating teeth 53;

[0041] In a further embodiment, a protruding post 56 is fixedly connected to the surface of the rotating shaft 51, and the protruding post 56 is adapted to the rotating groove 52; the adaptation of the protruding post 56 to the rotating groove 52 indicates that there is a region with a larger diameter in the rotating groove 52, and thus the rotating groove 52 is not cylindrical. The protruding post 56 can restrict the rotating shaft 51 from detaching from the fixing frame 26, ensuring that the impact nozzle 21 does not detach from the fixing frame 26.

[0042] In some specific implementations, a through groove 61 is provided on the surface of the housing 1, and the connecting pipe 22 passes through the through groove 61. A guide ring 62 is fixedly connected to the surface of the housing 1, and the inner wall of the guide ring 62 is slidably connected to the connecting pipe 22. By setting the guide ring 62 and the through groove 61, the position of the connecting pipe 22 is limited, so as to avoid the connecting pipe 22 from shifting due to water impact during use, which would affect the use of the cutter pump.

[0043] In some specific implementations, the cutter pump includes two housings 1 and a submersible pump. The two housings 1 are symmetrically arranged relative to the submersible pump. Each housing 1 has a cutter blade rotatably mounted at its end. A lifting ring is fixedly connected to the surface of the submersible pump.

[0044] This utility model embodiment also provides a dredging method for a cofferdam construction dredging equipment, including the following steps:

[0045] S1. Connect the cutter pump and the telescopic boom excavator, and fix the cutter pump to the end of the telescopic boom excavator through the lifting ring on the surface of the cutter pump;

[0046] S2. Install air suction machines. Air suction machines are installed around the steel cofferdam. The air suction machine consists of an air box, air supply pipe, water supply pipe, mixing pipe, high-pressure water nozzle, etc.

[0047] S3. Adjust the position of the surface impact nozzle 21 of the scissor pump, rotate the operating lever 34 to change the length of the pulling belt 33, and change the position of the adjusting frame 25; then rotate the squeezing rod 46 to disengage the squeezing rod 46 from the sliding rod 41, and disengage the limiting tooth 42 and the positioning tooth 44; then slide the fixing frame 26. After the fixing frame 26 is in the correct position, reset the squeezing rod 46 so that the limiting tooth 42 and the positioning tooth 44 are in contact; finally, pull the rotating column 54 to disengage the limiting tooth 55 and the rotating tooth 53, then rotate the impact nozzle 21 to the appropriate angle, reset the rotating column 54, and make the limiting tooth 55 and the rotating tooth 53 in contact;

[0048] S4. Dredging: The telescopic boom excavator drives the cutter pump to move inside the cofferdam, sucking up the silt in layers and making it sink evenly. The impact nozzle 21 sprays high-pressure water to make the submersible pump discharge the silt.

[0049] The working principle of this utility model:

[0050] Before use, when adjusting the position of the impact nozzle 21 on the surface of the suction pump, first change the height of the adjusting frame 25, rotate the operating lever 34 to change the length of the pulling belt 33, and change the position of the adjusting frame 25; after the position of the adjusting frame 25 is appropriate, change the position of the fixing frame 26 on the surface of the adjusting frame 25, rotate the squeezing rod 46 to make the squeezing rod 46 disengage from the sliding rod 41, and the limiting tooth 42 and the positioning tooth 44 disengage; then slide the fixing frame 26; after the position of the fixing frame 26 is appropriate, reset the squeezing rod 46 so that the limiting tooth 42 and the positioning tooth 44 contact; finally, pull the rotating column 54 to make the limiting tooth 55 and the rotating tooth 53 disengage, then rotate the impact nozzle 21 to the appropriate angle, reset the rotating column 54 so that the limiting tooth 55 and the rotating tooth 53 contact, and complete the position adjustment of the impact nozzle 21.

[0051] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A dredging and silt removal device for cofferdam construction, characterized in that, Includes a housing (1) for supporting the auger position, the surface of the housing (1) being provided with an impact mechanism, the impact mechanism comprising: An impact nozzle (21) is slidably disposed on the surface of a housing (1). A connecting pipe (22) is fixedly connected to the input end of the impact nozzle (21). A support block (23) is fixedly connected to the surface of the housing (1). A high-pressure pump (24) is fixedly connected to the surface of the support block (23). The output end of the high-pressure pump (24) is fixedly connected to the connecting pipe (22). The input end of the high-pressure pump (24) is connected to a water source through a pipe. An adjusting frame (25) is slidably disposed on the surface of the housing (1). A moving component is provided between the adjusting frame (25) and the housing (1). A fixed frame (26) is slidably connected inside the adjusting frame (25). A limiting component is provided between the fixed frame (26) and the adjusting frame (25) to limit the position of the fixed frame (26). A rotating component is provided between the fixed frame (26) and the impact nozzle (21) to change the angle of the impact nozzle (21) relative to the housing (1).

2. The cofferdam construction dredging equipment as described in claim 1, characterized in that, The moving component includes a moving shaft (31) fixedly mounted on the surface of the adjusting frame (25), and a moving groove (32) is provided on the surface of the housing (1), with the moving shaft (31) and the moving groove (32) being adapted to each other.

3. The cofferdam construction dredging equipment as described in claim 2, characterized in that, The cross-section of the moving shaft (31) is T-shaped.

4. The cofferdam construction dredging equipment as described in claim 2, characterized in that, A pull belt (33) is fixedly connected to the surface of the movable shaft (31), and an operating rod (34) is threadedly connected inside the housing (1). The end of the pull belt (33) is fixedly connected to the operating rod (34), and the pull belt (33) is wrapped around the surface of the operating rod (34).

5. The cofferdam construction dredging equipment as described in claim 1, characterized in that, The limiting component includes a sliding rod (41) slidably disposed inside the fixed frame (26). A plurality of limiting teeth (42) are fixedly connected to the side of the sliding rod (41) away from the impact nozzle (21). A sliding groove (43) is provided on the surface of the adjusting frame (25). The sliding rod (41) is adapted to the sliding groove (43). A plurality of positioning teeth (44) are fixedly connected inside the sliding groove (43). The plurality of positioning teeth (44) are spaced apart. Adjacent positioning teeth (44) are adapted to the limiting teeth (42).

6. The dredging equipment for cofferdam construction as described in claim 5, characterized in that, A positioning spring (45) is fixedly connected between the sliding rod (41) and the fixed frame (26). A pressing rod (46) is threadedly connected inside the fixed frame (26), and the end of the pressing rod (46) contacts the sliding rod (41).

7. The cofferdam construction dredging equipment as described in claim 1, characterized in that, The rotating assembly includes a rotating shaft (51) fixedly mounted on the surface of the impact nozzle (21), and a rotating groove (52) is provided on the surface of the fixing frame (26), the rotating groove (52) being adapted to the rotating shaft (51).

8. The cofferdam construction dredging equipment as described in claim 7, characterized in that, The rotating shaft (51) has a plurality of rotating teeth (53) fixedly connected to its end. The fixed frame (26) has a rotating column (54) slidably connected inside. The rotating column (54) has a plurality of limiting teeth (55) fixedly connected to one end near the rotating shaft (51). The limiting teeth (55) and the rotating teeth (53) are adapted to each other.

9. The cofferdam construction dredging equipment as described in claim 7, characterized in that, The rotating shaft (51) has a protruding post (56) fixedly connected to its surface, and the protruding post (56) is adapted to the rotating groove (52).

10. The cofferdam construction dredging equipment as described in claim 1, characterized in that, The surface of the housing (1) is provided with a through groove (61), and the connecting pipe (22) passes through the through groove (61). A guide ring (62) is fixedly connected to the surface of the housing (1), and the inner wall of the guide ring (62) is slidably connected to the connecting pipe (22).

Images