An underwater dredging device suitable for non-tidal river areas

Abstract

This utility model relates to the field of river dredging technology and discloses an underwater dredging device suitable for non-interceptable rivers. The device includes a cover, a high-pressure water connection pipe fixedly installed on the upper surface of the cover, and a suction pipe fixedly installed at the left end of the upper surface of the cover. Both the high-pressure water connection pipe and the suction pipe are connected to the interior of the cover. A ring plate is fixedly connected to the lower end of the outer surface of the cover, and a water spray box is fixedly installed on the upper surface of the cover. Through the closed space formed by the cover, the ring plate, and the rubber pad, the mud within the closed space is concentrated and confined inside the cover. The suction pipe can directly extract high-concentration mud (rather than large amounts of clean water), effectively preventing the mud generated by the high-pressure water impact from spreading to the outside of the cover, avoiding pollution of downstream water areas, meeting the environmental protection requirements of non-interceptable rivers, significantly reducing the ineffective operation of "draining clean water," significantly improving dredging efficiency, shortening operation time, and thus improving the efficiency of dredging work.

Description

Technical Field

[0001] This utility model relates to the field of river dredging technology, specifically to an underwater dredging device suitable for rivers that cannot be intercepted. Background Technology

[0002] River dredging is an engineering measure to remove silt from the bottom of rivers, lakes, and other water bodies. It aims to restore the function of water bodies and improve the ecology. The targets of dredging include silt, debris, and pollutants such as nitrogen, phosphorus, and heavy metals. It can solve problems such as reduced flood control capacity, water quality deterioration, and ecological damage. Dredging methods include mechanical, hydraulic, and environmentally friendly methods. The silt needs to be dewatered and rendered harmless, and some of it can be utilized as a resource. Construction needs to be combined with surveying, environmental management, and post-construction monitoring. It is a systematic project that takes into account both flood control and ecological restoration.

[0003] Currently, dredging non-interceptable river sections remains a major challenge in river dredging operations. Since drainage cannot be carried out in these sections, the use of high-pressure water flushing can easily lead to the widespread diffusion of mud, which not only pollutes downstream water bodies and fails to meet environmental protection requirements, but also causes the dispersed mud to float everywhere, resulting in the suction pump drawing out large amounts of clean water during the operation, which seriously affects dredging efficiency and significantly prolongs the operation time. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides an underwater dredging device suitable for non-interceptable river basins. It solves the problems of using high-pressure water to flush silt, which causes mud to scatter everywhere, easily leading to downstream water quality issues and being environmentally unfriendly. Moreover, after flushing, the mud floats everywhere, and even after using a suction pump for a long time, only clear water is pumped up, resulting in low dredging efficiency and excessively long dredging time.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: an underwater dredging device suitable for non-interceptable river basins, comprising a cover, a high-pressure water connection pipe fixedly installed on the upper surface of the cover, a suction pipe fixedly installed on the left end of the upper surface of the cover, both the high-pressure water connection pipe and the suction pipe communicating with the interior of the cover, and an annular plate fixedly connected to the lower end of the outer surface of the cover.

[0008] A water spray box is fixedly installed on the upper surface of the cover. The upper end of the water spray box is open and connected to the internal high-pressure water pipe. Multiple water spray holes are opened on the lower surface of the water spray box. A rubber pad is fixedly installed on the lower surface of the annular plate. Four mounting plates are fixedly connected in a ring array on the outer surface of the annular plate.

[0009] Preferably, the upper surface of the mounting plate on the right side has a circular hole, and a support rod is slidably inserted into the interior of the circular hole. The upper surface of the mounting plate on the right side also has a rectangular hole, which communicates with the interior of the circular hole.

[0010] Preferably, rectangular plates are fixedly connected to both ends of the support rod, and rubber blocks are fixedly installed on the upper surface of both rectangular plates.

[0011] Preferably, each of the four mounting plates is provided with a support rod, and a throttle is fixedly connected to the upper surface of each of the four support rods.

[0012] Preferably, connecting pipes are fixedly installed on the upper surfaces of both the high-pressure water connecting pipe and the suction pipe.

[0013] Preferably, the outer surface of the cover is fixedly connected with lifting lugs in a ring array.

[0014] Preferably, the spray holes on the lower surface of the spray tank are evenly distributed radially along the radial direction of the spray tank.

[0015] Preferably, the lower surface of the rubber pad is provided with a flexible raised texture adapted to the irregular terrain of the riverbed.

[0016] Preferably, the rectangular plate is adapted to the rectangular hole.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides an underwater dredging device suitable for non-interceptable river basins, which has the following beneficial effects:

[0019] 1. This underwater dredging device, applicable to non-interceptable river areas, uses a closed space formed by a cover, annular plate, and rubber pad. The sludge within this closed space is concentrated and confined inside the cover. The suction pipe can directly extract high-concentration sludge (instead of large amounts of water), effectively preventing the sludge generated by high-pressure water impact from spreading to the outside of the cover, avoiding pollution of downstream water areas, meeting the environmental protection requirements of non-interceptable river areas, significantly reducing ineffective "water pumping" operations, significantly improving dredging efficiency, shortening operation time, and thus improving the efficiency of dredging work. Attached Figure Description

[0020] Figure 1 This is a top view schematic diagram of the overall structure of the underwater dredging device of this utility model applicable to non-interceptable river basins;

[0021] Figure 2 This is a cross-sectional front view of the internal structure of the underwater dredging device of this utility model applicable to non-interceptable river basins;

[0022] Figure 3This is a cross-sectional view of the support rod of this utility model;

[0023] Figure 4 This is a schematic diagram of the internal cross-sectional side view of the mounting plate of this utility model.

[0024] In the diagram: 1. Cover; 2. High-pressure water connection pipe; 3. Suction pipe; 4. Annular plate; 5. Water tank; 6. Water spray hole; 7. Rubber pad; 8. Mounting plate; 9. Circular hole; 10. Support rod; 11. Rectangular hole; 12. Rectangular plate; 13. Rubber block; 14. Thruster; 15. Connecting pipe; 16. Lifting lug. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4 This utility model provides a new technical solution:

[0027] Cover 1: As the core enclosed component of the entire dredging device, it is like an "underwater workshop" to create a relatively enclosed space environment for high-pressure water flushing of riverbed silt and silt suction operations, to prevent silt and sewage from spreading everywhere during the dredging process, and to ensure that the dredging operation can be carried out stably in non-interceptable river areas.

[0028] High-pressure water connection pipe 2: Installed on the upper surface of the cover 1, it is like a "water supply channel" responsible for introducing external high-pressure water into the interior of the cover 1 to provide power water flow for subsequent flushing of silt;

[0029] Suction pipe 3: Fixed on the left end of the upper surface of the cover 1, like a "sewage channel", working with the external suction equipment to suck out the sludge mixture that is flushed up by high-pressure water inside the cover 1 to the external treatment equipment, realizing a key step in dredging - transferring the sludge from the bottom of the river.

[0030] Spray tank 5: Installed on the upper surface of the cover 1 and connected to the inside of the high-pressure water connection pipe 2, it is equivalent to a "water flow distributor". After the high-pressure water enters the spray tank 5 through the high-pressure water connection pipe 2, it will be sprayed evenly and dispersedly to the river bottom area inside the cover 1 through multiple spray holes 6 opened on its lower surface, so that the high-pressure water flow can more comprehensively and evenly flush the silt on the river bottom and improve the flushing effect.

[0031] Spray holes 6: are opened on the lower surface of the spray tank 5 and are evenly distributed radially along the radial direction of the spray tank 5; this distribution pattern allows high-pressure water to diffuse outward from the center of the spray tank 5, just like "sprinkling water with a shower", covering a wider and more even area of ​​the riverbed inside the cover 1, and flushing the silt on the riverbed more thoroughly.

[0032] Annular plate 4: It is fixedly connected to the lower end of the outer surface of the cover 1 and plays the role of "extending the seal". It works with the rubber pad 7 below to increase the contact area between the cover 1 and the river bottom, help the cover 1 fit the river bottom better, improve the sealing between the cover 1 and the river bottom, and reduce the leakage of silt and sewage from the gap between the cover 1 and the river bottom during dredging operations.

[0033] Rubber pad 7: Installed on the lower surface of the annular plate 4, its lower surface has flexible raised textures that adapt to the irregular terrain of the riverbed; the rubber pad 7 itself is soft and elastic, and with these flexible raised textures, it is like a "soft rubber sole", which can better fit the uneven terrain of the riverbed and further enhance the sealing between the cover 1 and the riverbed. Even if the riverbed is pitted or has rocks, it can reduce gaps and ensure the enclosed working space.

[0034] Furthermore, through the enclosed space formed by the cover 1, the annular plate 4, and the rubber pad 7, the mud in the enclosed space is concentrated and confined inside the cover 1. The suction pipe 3 can directly extract high-concentration mud (instead of a large amount of clean water), which can effectively prevent the mud generated by the high-pressure water impact from spreading to the outside of the cover, avoid pollution of downstream water areas, meet the environmental protection requirements of non-interceptable river areas, greatly reduce the ineffective operation of "draining clean water", significantly improve dredging efficiency, shorten operation time, and thus improve the efficiency of dredging work.

[0035] Mounting plate 8: Four of them are fixedly connected in a ring array on the outer surface of the ring plate 4, serving as a "carrier for supporting auxiliary components" for mounting components such as support rod 10;

[0036] Support rod 10: It slides up and down in the circular hole 9 of the mounting plate 8 and can be moved up and down to provide suspension support for the cover 1 when it is placed in other areas such as the ground. When working, the support rod 10 needs to be removed.

[0037] Circular hole 9: It is opened on the upper surface of the mounting plate 8 and serves as the installation "channel" for the support rod 10, allowing the support rod 10 to slide smoothly up and down to achieve length adjustment, and playing a guiding and limiting role for the support rod 10;

[0038] Rectangular hole 11: It is opened on the upper surface of the mounting plate 8 and communicates with the interior of the circular hole 9; it cooperates with the matching rectangular plate 12, and by inserting the rectangular plate 12 into the rectangular hole 11, it restricts the up and down movement of the support rod 10, thereby fixing the position of the support rod 10 and ensuring the stability of the cover 1.

[0039] Rectangular plate 12: It is fixedly connected to the left and right ends of the support rod 10 and is adapted to the rectangular hole 11; its main function is to cooperate with the rectangular hole 11 to limit and fix the support rod 10.

[0040] Rubber block 13: Installed on the upper surface of rectangular plate 12, it is soft in texture; when rectangular plate 12 is inserted into rectangular hole 11, rubber block 13 will be squeezed between rectangular plate 12 and the upper surface of mounting plate 8, playing a "buffering and anti-slip" role, increasing friction, and further improving the stability of support rod 10.

[0041] Rotary handle 14: It is fixedly connected to the upper surface of the support rod 10, just like a "handle"; when installing and adjusting the support rod 10, the staff can operate the support rod 10 to slide up and down and rotate more conveniently and effortlessly by rotating and pulling the rotary handle 14.

[0042] Connecting pipe 15: Installed on the upper surface of high-pressure water connecting pipe 2 and suction pipe 3, allowing high-pressure water connecting pipe 2 and suction pipe 3 to be more easily connected to external equipment to realize water input and sludge suction functions;

[0043] Lifting lugs 16: They are fixedly connected in a ring array on the outer surface of the cover 1, like "hooks"; they are used to cooperate with lifting equipment to facilitate the lowering and lifting of the entire dredging device into and out of the water, enabling the installation, deployment, and retrieval of the device, and facilitating construction operations.

[0044] Furthermore, utilizing the annular array of lifting lugs 16 on the outer surface of the cover 1, the device is transported to the dredging site in the non-interceptable river area using hoisting equipment. During transportation or temporary placement, the support rods 10 on the four mounting plates 8 are fixed by the cooperation of the rectangular plates 12 and the rectangular holes 11, providing stable support for the device. Before entering the operation stage, the support rods 10 are pulled out from the circular holes 9 using the throttle 14, and then the device is lowered to the riverbed. After the device is lowered, the rubber pads 7 on the lower surface of the annular plate 4 contact the riverbed, closely adhering to the ground. The lower part of the enclosure 1 forms a relatively enclosed working space to reduce mud spillage. The external high-pressure water source is connected through the connecting pipe 15 of the high-pressure water connection pipe 2. After the high-pressure water enters the water spray box 5, it is sprayed out through the radially distributed water spray holes 6 on the lower surface, which evenly impacts the silt on the riverbed and breaks up the solidified silt into mud. At the same time, the suction pipe 3 is connected to the external suction pump through the connecting pipe 15, which creates a negative pressure inside the enclosure 1 and concentrates the mud impacted by the high-pressure water in the enclosed space to the external treatment equipment to complete the dredging.

[0045] Example 1

[0046] Four support rods 10 are inserted into the circular holes 9 through the rectangular holes 11 of the rectangular plate 12 and the mounting plate 8. The rubber block 13 contacts the surface of the mounting plate 8 to form a stable support. The device can be placed on the ground or on a transport device. During operation, the device is hoisted to the work point in the non-interceptable river area through the lifting lug 16. High-pressure water is connected to the high-pressure water connecting pipe 2 through the connecting pipe 15 and sprayed out through the radial spray holes 6 of the spray box 5 to impact the silt on the riverbed. At the same time, the suction pipe 3 is connected to the external suction equipment through the connecting pipe 15 to concentrate and remove the mud in the cover 1, thus completing the basic dredging operation.

[0047] Example 2

[0048] When dredging is required for long-distance rivers, multiple devices can be deployed sequentially along the river course. The high-pressure water connection pipe 2 of each device is connected in series with the same high-pressure water source main pipeline through the connection pipe 15, and the suction pipe 3 is connected in parallel with the main suction pipeline through the connection pipe 15, so as to achieve the coordinated operation of "unified water supply + centralized dredging".

[0049] Example 3

[0050] The rubber pad 7 of the device can adapt to deformation through flexible raised texture to fill the gaps in the terrain. If the sealing of a local area is insufficient, a flexible sealing strip can be laid on the edge of the rubber pad 7 to further enhance the negative pressure environment inside the cover 1. The radial spray holes 6 of the spray tank 5 can evenly impact the silt at different angles, avoiding dead corners in dredging caused by terrain obstruction, and ensuring that the silt on the riverbed is fully dispersed and then extracted by the suction pipe 3.

[0051] Example 4

[0052] For areas with complex terrain such as rocks and depressions on the riverbed, the rubber mat 7 can also use a multi-layer structure, with the outer layer made of hard rubber for shaping and the inner layer made of soft, highly elastic rubber (such as silicone) to enhance the fit, or an inflatable rubber airbag can be added to the bottom of the skirt to inflate and fill the terrain gaps before operation.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An underwater dredging device suitable for non-interceptable river basins, comprising a cover (1), characterized in that: A high-pressure water connection pipe (2) is fixedly installed on the upper surface of the cover (1), and a suction pipe (3) is fixedly installed on the left end of the upper surface of the cover (1). Both the high-pressure water connection pipe (2) and the suction pipe (3) are connected to the interior of the cover (1). A ring plate (4) is fixedly connected to the lower end of the outer surface of the cover (1). A water spray box (5) is fixedly installed on the upper surface of the cover (1). The upper end of the water spray box (5) is open. The water spray box (5) is connected to the interior of the high-pressure water connection pipe (2). Multiple water spray holes (6) are opened on the lower surface of the water spray box (5). A rubber pad (7) is fixedly installed on the lower surface of the annular plate (4). Four mounting plates (8) are fixedly connected in an annular array on the outer surface of the annular plate (4).

2. The underwater dredging device for non-interceptable river basins according to claim 1, characterized in that: A circular hole (9) is provided on the upper surface of the mounting plate (8) on the right side. A support rod (10) is slidably inserted into the interior of the circular hole (9). A rectangular hole (11) is also provided on the upper surface of the mounting plate (8) on the right side. The rectangular hole (11) communicates with the interior of the circular hole (9).

3. The underwater dredging device for non-interceptable river basins according to claim 2, characterized in that: The support rod (10) is fixedly connected to rectangular plates (12) at both ends, and rubber blocks (13) are fixedly installed on the upper surface of the two rectangular plates (12).

4. The underwater dredging device for non-interceptable river basins according to claim 2, characterized in that: Each of the four mounting plates (8) is provided with a support rod (10), and a throttle (14) is fixedly connected to the upper surface of each of the four support rods (10).

5. The underwater dredging device for non-interceptable river basins according to claim 1, characterized in that: The upper surfaces of both the high-pressure water connection pipe (2) and the suction pipe (3) are fixedly equipped with connection pipes (15).

6. The underwater dredging device for non-interceptable river basins according to claim 1, characterized in that: The outer surface of the cover (1) is fixedly connected with lugs (16) in a ring array.

7. The underwater dredging device for non-interceptable river basins according to claim 1, characterized in that: The spray holes (6) on the lower surface of the spray tank (5) are evenly distributed radially along the radial direction of the spray tank (5).

8. The underwater dredging device for non-interceptable river basins according to claim 1, characterized in that: The lower surface of the rubber pad (7) is provided with a flexible raised texture that adapts to the irregular terrain of the riverbed.

9. The underwater dredging device for non-interceptable river basins according to claim 3, characterized in that: The rectangular plate (12) is adapted to the rectangular hole (11).

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