Underwater arranging and laying device under high flow speed

Abstract

The utility model relates to the technical field of underwater engineering, in particular to an underwater arranging and laying device under high flow speed. Comprising arrangement, and a first ballast part and a second ballast part are fixed to the two ends of the arrangement respectively; the winding drum is used for winding, arranging and rolling to form an arranged roll; a strip-shaped groove extending in the axial direction of the winding drum is formed in the surface of the winding drum. When the first ballasting piece is arranged on the winding drum to form the arrangement roll, the first ballasting piece is arranged in the groove, the first ballasting piece is used as the starting end, the space of the roll row is not occupied, and the roll row arranged in a large length can be achieved. The arrangement roll is arranged on the winding drum to be wound and arranged, and the second ballast piece is the tail end of the arrangement roll; during underwater arrangement, the two ends of the arrangement are pressed into mud, displacement or floating of the two ends of the arrangement at the high flow speed is prevented, the resistance to water flow and wave impact is enhanced, the later adjustment and correction time is shortened, the stability, safety and efficiency of underwater arrangement are improved, and meanwhile the maintenance cost and the influence on the environment are reduced.

Description

Technical Field

[0001] This utility model relates to the field of underwater engineering technology, and in particular to an underwater layout and laying device under high flow velocity. Background Technology

[0002] In current underwater laying technology, because the laying device itself is relatively light and has a large planar dimension, the laying work is usually carried out during the slack tide period or when the current velocity is low in order to reduce the impact of water flow on the stability of the laying device. It is usually done by ballasting both ends separately, or ballasting one end and fixing the other end with heavy objects such as boulders. However, this method has many limitations and disadvantages, especially under high-velocity water conditions, the construction difficulty increases significantly, affecting the laying quality and project stability.

[0003] Because the existing laying method relies on low flow conditions, when the water is deep and the flow is rapid or the flow direction is turbulent, it is easy to cause tearing and disintegration due to the water flow. It is impossible to carry out efficient operation under conditions of high flow velocity or rapid tidal changes, resulting in limited construction period and difficulty in meeting the urgent construction period requirements.

[0004] When the water flow velocity is high, heavy objects such as boulders are used for ballast. However, it is difficult to fix and arrange the boulders quickly and accurately. The arrangement may drift, or even be lifted or overturned by the water flow, causing the paving position to deviate and affecting the overall stability. At the same time, because the water flow is directional and variable, the boulder ballast method is prone to causing some areas to be stressed while other areas are not stressed enough, resulting in local bulging or tearing, thus affecting the paving effect.

[0005] Under high flow velocity conditions, underwater layout devices are easily affected by complex hydrodynamic forces such as turbulence and backflow during installation, making it difficult to maintain stable deployment and potentially requiring re-laying, further extending the construction period. There is an urgent need for an underwater layout device that can adapt to high flow velocity environments to improve laying efficiency and enhance layout stability. Utility Model Content

[0006] To address the shortcomings of the existing technology, this utility model provides an underwater laying device for high flow rates, which eliminates the need for secondary ballast at both ends and significantly improves construction efficiency.

[0007] This utility model provides an underwater laying device for high-velocity flow, comprising:

[0008] The arrangement is such that the first ballast member and the second ballast member are fixed at both ends of the arrangement, respectively;

[0009] A drum is used to wind the fabric to form a roll of fabric. Both ends of the drum are connected to a traction rope, which drives the drum to roll.

[0010] The surface of the drum is provided with a strip-shaped groove extending along its axial direction;

[0011] When the arrangement is wound onto the roll to form the arrangement roll, the first ballast is placed in the groove, with the first ballast as the starting end, and the arrangement is wound onto the roll. The second ballast is the end of the arrangement roll.

[0012] When the fabric roll is laid underwater, the second ballast member is used as the starting end and pressed into the mud for laying, and the first ballast member is pressed into the mud as the end of the fabric roll laying.

[0013] In this technical solution, a first ballast and a second ballast are fixed at both ends of the layout. A groove is provided on the drum. When rolling, the first ballast is placed in the groove of the drum, which does not occupy the space of the roll and can realize the roll of a larger length of layout. When laying underwater, the two ends of the layout are pressed into the mud to prevent the two ends of the layout from shifting or floating under high flow velocity. This enhances the resistance to water flow and wave impact, reduces the time for later adjustment and correction, improves the stability, safety and efficiency of underwater laying, and reduces maintenance costs and environmental impact.

[0014] In some embodiments of this application, in order to further increase the ability of the fabric to resist the impact of large water flow on both sides, pressure plate assemblies are provided at both ends of the drum. The pressure plate assemblies are used to press the two sides of the laid fabric into the mud. During the laying process, the starting end and both sides of the fabric are pressed into the mud and fixed, which effectively prevents the fabric from floating under the impact of large water flow and affecting the laying quality.

[0015] In some embodiments of this application, the pressure plate assembly includes:

[0016] A pressure plate is provided near one side of the fabric roll, and its plane is perpendicular to the axis of the roll. During the laying process, the pressure plate can press the side of the fabric roll into the mud.

[0017] A rotating shaft is provided at the center of the pressure plate, and the outer end of the rotating shaft is connected to the end of the drum through a connecting rod;

[0018] A counterweight is fixed to one end of the connecting rod near the pressure plate. With the cooperation of the counterweight, the pressure plate presses the sides of the arrangement into the mud, improving the ability of the two sides of the arrangement to resist the scouring of large water flows. The counterweight can be adjusted according to different geological conditions so that the pressure plate can still be pressed into the mud to a suitable depth under different geological conditions to stably fix the sides of the arrangement.

[0019] In some embodiments of this application, the two pressure plate assemblies are mirror-arranged with respect to the central axis of the arrangement, and the pressure plate is 5-15cm away from the edge of the adjacent side of the arrangement. This avoids the pressure plate being too far from the edge of the arrangement, which would prevent it from providing adequate pressure on the side of the arrangement and making it easy for the side of the arrangement to be lifted by high-velocity water flow, which could lead to tearing of the arrangement.

[0020] In some embodiments of this application, the pressure plate is a disc-shaped structure, and the rotation of the drum drives the rotating shaft to rotate via a connecting rod, which in turn drives the pressure plate to rotate.

[0021] In some embodiments of this application, in order to further prevent the arrangement from floating under the action of a large water flow, a pressure roller is provided between the two pressure plate assemblies. The two ends of the pressure roller are respectively connected to the two rotating shafts. The pressure roller presses the middle part of the arrangement into contact with the mud surface. Even under the action of a large water flow, since the ends of the arrangement are fixed by the second ballast member pressed into the mud, the two sides are pressed into the mud, and the middle part is pressed into contact with the mud surface, the arrangement is tightly attached to the mud surface and will not float.

[0022] In some embodiments of this application, the diameter of the pressure plate and the weight of the counterweight are configured according to the geological conditions of the construction area, so that the pressure plate can press the two sides of the arrangement into the mud to a depth of 10-15cm, so as to ensure that the sides of the arrangement will not be washed out by the water flow when pressed into the mud, and can resist the scouring of large water flow.

[0023] In some embodiments of this application, the fabric roll is bound with a slipknot rope so that the second ballast member and the fabric roll form a whole, and will not come apart during subsequent transfer and hoisting of the fabric roll.

[0024] Based on the above technical solution, the two ends of the layout are fixed with a first ballast member and a second ballast member. The drum is provided with a groove. When rolling, the first ballast member is placed in the groove of the drum, which does not occupy the space of the roll and can realize the roll of a larger length of layout. When laying underwater, the two ends of the layout are pressed into the mud to prevent the two ends of the layout from shifting or floating under high flow velocity. This enhances the resistance to water flow and wave impact, reduces the time for later adjustment and correction, improves the stability, safety and efficiency of underwater laying, and reduces maintenance costs and environmental impact.

[0025] The pressure plate assembly allows the two sides of the layout to be pressed into the mud during the laying process, improving the ability of the two sides of the layout to resist the scouring of large water flows, preventing the layout from shifting laterally, ensuring that the laying axis is consistent with the design position, and enabling simultaneous positioning and fixing, shortening the construction period and reducing the cost of repeated adjustments.

[0026] The pressure rollers between the pressure plates can press the middle area of ​​the fabric into close contact with the mud surface, ensuring that the fabric is tightly attached to the mud surface. This prevents the fabric from floating or twisting due to uneven buoyancy, keeps the laying surface flat, further increases the fabric's ability to resist the impact of large water flows, and reduces the need for subsequent adjustments. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0028] Figure 1 This is a left view of the arrangement roll and pressure plate assembly according to an embodiment of the present utility model;

[0029] Figure 2 This is a top view of the arrangement roll and pressure plate assembly according to an embodiment of the present utility model;

[0030] Figure 3 This is a left view of the laying vessel after the lifting device is connected to the laying roll and pressure plate assembly in this embodiment of the utility model;

[0031] Figure 4 This is a top view of the laying vessel after the lifting device is connected to the laying roll and pressure plate assembly in this embodiment of the utility model;

[0032] Figure 5 This is a left view of the lifting device in this embodiment of the invention, showing the arrangement roll and pressure plate assembly being lifted above the mud surface.

[0033] Figure 6 This is a top view of the lifting device in this embodiment of the invention, which lifts the arrangement roll and pressure plate assembly above the mud surface.

[0034] Figure 7 This is a left view of the traction rope pulling the laying roll and pressure plate assembly to start laying in this embodiment of the utility model;

[0035] Figure 8 This is a top view of the traction rope pulling the laying roll and pressure plate assembly to start laying in this embodiment of the utility model;

[0036] Figure 9 This is a left view of the traction rope pulling the laying roll and pressure plate assembly in this embodiment of the present invention.

[0037] Figure 10 for Figure 9 Enlarged view of part A;

[0038] Figure 11 This is a top view of the traction rope pulling the laying roll and pressure plate assembly in this embodiment of the utility model;

[0039] Figure 12 This is a schematic diagram of the structure of the first ballast member in an embodiment of the present invention when it is about to detach from the drum;

[0040] Figure 13 This is a schematic diagram of the structure of the first ballast component when it is detached from the drum in an embodiment of this utility model;

[0041] Figure 14 This is a top view of the arrangement roll and the pressure plate assembly with pressure rollers according to another embodiment of the present invention.

[0042] In the picture:

[0043] 10. Arrangement; 11. First ballast component; 12. Second ballast component; 20. Drum; 21. Groove; 22. Drum shaft; 30. Pressure plate assembly; 31. Pressure plate; 311. Rotating shaft; 32. Connecting rod; 33. Counterweight; 34. Pressure roller; 40. Laying boat; 41. Lifting rope; 42. Lifting tool; 43. Traction rope; 44. Traction column; 50. Mud surface. Detailed Implementation

[0044] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0045] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] The underwater laying device under high current velocity conditions in this embodiment is suitable for construction environments with high underwater current velocity. The underwater laying device is laid by towing a laying vessel 40. The underwater laying device includes:

[0049] Arrangement 10, with the first ballast member 11 and the second ballast member 12 fixed at both ends of arrangement 10 respectively;

[0050] The drum 20 is used to wind the arrangement 10 to form an arrangement roll. Both ends of the drum 20 are connected to the traction rope 43, and the traction rope 43 drives the drum 20 to roll.

[0051] The surface of the drum 20 is provided with a strip-shaped groove 21 extending along its axial direction;

[0052] When the arrangement 10 is wound onto the roll 20 to form a roll, the first ballast member 11 is placed in the groove 21, with the first ballast member 11 as the starting end, and the arrangement 10 begins to wind onto the roll 20. The second ballast member 12 is the end of the roll. After one end of the arrangement 10 is fixed with the first ballast member 11, the first ballast member 11 is placed in the groove 21 of the roll, as shown. Figure 1 As shown, one end of the arrangement with the first ballast 11 is fixed to the drum 20, and the winding is started from the starting end of the arrangement; the groove 21 is provided on the surface of the drum 20 to facilitate the winding of the arrangement 10. The first ballast 11 does not occupy the space of the winding and can realize the winding of a larger length of arrangement.

[0053] When the fabric roll is laid underwater, the second ballast member 12 is used as the starting end and pressed into the mud for laying, and the first ballast member 11 is pressed into the mud as the end of the laying of the fabric roll.

[0054] In this embodiment, the first ballast member 11 and the second ballast member 12 are block structures, which are easy to press into the mud. Their length is consistent with the width of the arrangement 10. Alternatively, the first ballast member 11 and the second ballast member 12 are composed of multiple block structures. The block structures are evenly distributed along the width direction of the arrangement, so that both ends of the arrangement can be pressed into the mud.

[0055] After the roll is rolled up, the roll is tied with a slipknot rope (not shown in the figure) so that the second ballast 12 and the roll form a whole, which makes it easy to transfer and hoist the roll in the subsequent process, keeping it intact and preventing it from falling apart.

[0056] To facilitate the rolling of the fabric roll during subsequent underwater laying, roll shafts 22 are provided at both ends of the roll 20. The roll shafts 22 drive the roll 20 to move and rotate synchronously, and the fabric roll rotates synchronously for laying.

[0057] To further enhance the resistance of the fabric arrangement 10 to the impact of large water flows and ensure stable ballast at both ends and sides after laying, pressure plate assemblies 30 are provided at both ends of the drum 20. These pressure plate assemblies 30 are used to press the sides of the laid fabric arrangement into the mud. In this embodiment, there are two sets of pressure plate assemblies 30, respectively located at both ends of the drum 20. Figures 1-2 As shown, the structure of the pressure plate assembly 30 includes:

[0058] The pressure plate 31 has a disc-shaped structure. The pressure plate 31 is set against one side of the laying roll. The plane of the pressure plate 31 is perpendicular to the axis of the roll 20, so that the pressure plate 31 can press the side of the laying 10 into the mud during laying.

[0059] A rotating shaft 311 is provided at the center of the pressure plate 31. The outer end of the rotating shaft 311 is connected to the drum shaft 22 of the drum 20 through a connecting rod 32. The drum shaft 22 drives the rotating shaft 311 to move through the connecting rod 32, so that the pressure plate 31 and the drum 20 move synchronously.

[0060] The counterweight 33 is fixed to one end of the connecting rod 32 near the pressure plate 31. Under the gravity of the counterweight 33, the pressure plate 31 presses the side of the arrangement 10 into the mud, improving the ability of the two sides of the arrangement to resist the scouring of large water flow. The counterweight 33 can be adjusted according to different geological conditions so that the pressure plate 31 can still be pressed into the mud to a suitable depth under different geological conditions, so as to stably fix the side of the arrangement 10. This avoids the need for ballasting with stones during conventional paving under high flow velocity conditions. However, it is difficult to fix the arrangement quickly and accurately, and the arrangement may drift, or even be lifted or overturned by the water flow, resulting in the paving position shift and affecting the overall stability.

[0061] See also Figure 2 The two pressure plate assemblies 30 are mirror images of the central axis of the arrangement 10, and the two pressure plates 31 are arranged opposite each other. In this embodiment, the pressure plate 31 is 5-15cm away from the side edge of its neighboring arrangement 10, so that when the drum 20 moves the pressure plate 31, the pressure plate 31 can press the side edge of the arrangement 10 into the mud, avoiding the situation where the pressure plate 31 is too far away from the side edge of the arrangement 10 and cannot play a good ballast role on the side edge of the arrangement 10, and the side edge of the arrangement is easily lifted by the high-velocity water flow or even torn apart.

[0062] In order to avoid interference during the winding of the pressure plate assembly 30, in this embodiment, after the winding is completed and tied with a slipknot rope, the connecting rod 32 of the pressure plate assembly 30 is connected to the winding shaft 22 of the winding drum 20. At this time, the winding and the pressure plate assembly 30 form a whole.

[0063] In this embodiment, the already assembled layout roll and pressure plate assembly 30 is transferred to the laying vessel 40, such as... Figure 3 As shown, using lifting ropes 41, the fabric roll and pressure plate assembly 30 are connected to the lifting device 42 on the laying vessel 40, respectively. The outer ends of the connecting rods 32 of the two pressure plate assemblies 30 are fixed with traction ropes 43, and the other ends of the traction ropes 43 are fixed to the traction posts 44 at both ends of the laying vessel 40. Figure 4 As shown; when the laying vessel 40 arrives at the construction site, the lifting equipment 42 first lifts the laying roll and pressure plate assembly 30 off the laying vessel, and then slowly lowers them to the underwater laying position, as shown. Figures 5-6 As shown; when the hoisting rope 41 continues to lower the fabric roll and pressure plate assembly 30 until they contact the mud surface 50, the connection between the hoisting rope 41 and the fabric roll and pressure plate assembly 30 is released, and the binding of the slip knot rope to the fabric roll is also released. At this time, the traction rope 43 is in a relaxed state. After the hoisting rope 41 is released, the lifting device 42 is turned around; after moving the laying vessel 40 to a certain position, as shown... Figures 7-8 As shown, the traction rope 43 is tightened, the laying boat continues to move, the traction rope 43 pulls the connecting rod 32, the connecting rod drives the drum and pressure plate 31 to move and rotate at the same time, the laying begins;

[0064] When the roll 20 starts to rotate and lay, the second ballast 12 can be crushed by the laying roll. Under the action of the gravity of the laying roll, the second ballast 12 is pressed into the mud, fixing the starting end of the laying 10 and preventing the starting end from being lifted by the water flow.

[0065] The pressure plate assembly 30 is located behind the laying roll. The traction rope 43 pulls the drum 20 to roll via the connecting rod 32. At the same time, the connecting rod 32 drives the pressure plate 31 to roll synchronously. During the laying of the layout 10, the pressure plate 31 then presses the two sides of the laid layout 10 into the mud, such as... Figures 11-12 As shown, during the laying process, the starting end and both sides of the arrangement 10 are pressed into the mud and fixed, effectively preventing the starting end and both sides of the arrangement 10 from floating under the impact of large water flow, which would affect the laying quality. The diameter of the pressure plate 31 and the weight of the counterweight 33 are configured according to the geological conditions of the construction area, so that the pressure plate 31 can press the two sides of the arrangement into the mud to a depth of 10-15cm, so as to ensure that the sides of the arrangement will not be washed out by the water flow when pressed into the mud, and can resist the scouring of large water flow.

[0066] The 40-boat continued to move, as... Figure 13The diagram shows the state when the first ballast member 11 is about to detach from the drum 20. The ballast ship continues to move, and the first ballast member 11 detaches from the groove 21 of the drum, as shown. Figure 14 As shown, when the first ballast 11 is subsequently pressed into the mud under the rolling action of the roller 20, the laying of the arrangement is completed.

[0067] To further prevent the arrangement from floating under the influence of strong water flow, in another embodiment, a pressure roller 34 is provided between the two pressure plate assemblies 30, such as... Figure 14 As shown; the two ends of the pressure roller 34 are respectively connected to two rotating shafts 311; during the laying process in step S4, the traction rope 43 pulls the connecting rod 32, the connecting rod 32 drives the drum to roll, and the connecting rod simultaneously drives the rotating shaft to rotate. During the laying process of the layout 10, the pressure plate 31 then presses the two sides of the laid layout 10 into the mud, while the pressure roller 34 presses the middle part of the layout into contact with the mud surface. Even under the action of a large water flow, since the starting end of the layout 10 is fixed by the second ballast member 12 pressed into the mud, the two sides are pressed into the mud, and the layout is tightly attached to the mud surface, avoiding the layout from floating or twisting due to uneven buoyancy, keeping the laying surface flat, further increasing the layout's ability to resist the impact of large water flow, and reducing the need for subsequent adjustments.

[0068] Based on the above technical solution, the first and second ballast components are fixed at both ends when the layout is rolled up, so that when the layout is laid underwater, the two ends of the layout are pressed into the mud, preventing the two ends of the layout from shifting or floating under high flow velocity, enhancing the resistance to water flow and wave impact, reducing the time for later adjustment and correction, improving the stability, safety and efficiency of underwater laying, and reducing maintenance costs and environmental impact.

[0069] The pressure plate assembly allows the two sides of the layout to be pressed into the mud during the laying process, which improves the ability of the two sides of the layout to resist the scouring of large water flows, prevents the layout from shifting laterally, ensures that the laying axis is consistent with the design position, and enables simultaneous positioning and fixing, shortens the construction period, and reduces the cost of repeated adjustments.

[0070] The pressure rollers between the pressure plates can press the middle area of ​​the fabric into close contact with the mud surface, ensuring that the fabric is tightly attached to the mud surface. This prevents the fabric from floating or twisting due to uneven buoyancy, keeps the laying surface flat, further increases the fabric's ability to resist the impact of large water flows, and reduces the need for subsequent adjustments.

[0071] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0072] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. An underwater laying device for high-velocity flow, characterized in that: include: The arrangement is such that the first ballast member and the second ballast member are fixed at both ends of the arrangement, respectively; A drum is used to wind the fabric to form a roll of fabric. Both ends of the drum are connected to a traction rope, which drives the drum to roll. The surface of the drum is provided with a strip-shaped groove extending along its axial direction; When the arrangement is wound onto the roll to form the arrangement roll, the first ballast is placed in the groove, with the first ballast as the starting end, and the arrangement is wound onto the roll. The second ballast is the end of the arrangement roll. When the fabric roll is laid underwater, the second ballast member is used as the starting end and pressed into the mud for laying, and the first ballast member is pressed into the mud as the end of the fabric roll laying.

2. The underwater laying device under high flow velocity according to claim 1, characterized in that, The roller is provided with pressure plate assemblies at both ends. The pressure plate assemblies are used to press the two sides of the laid arrangement into the mud. During the laying process, the starting end and both sides are pressed into the mud for fixation.

3. The underwater laying device under high flow velocity according to claim 2, characterized in that, The pressure plate assembly includes: A pressure plate is provided near one side of the fabric roll, and its plane is perpendicular to the axis of the roll. During the laying process, the pressure plate can press the side of the fabric roll into the mud. A rotating shaft is provided at the center of the pressure plate, and the outer end of the rotating shaft is connected to the end of the drum through a connecting rod; A counterweight is fixed to one end of the connecting rod near the pressure plate. With the cooperation of the counterweight, the pressure plate presses the sides of the arrangement into the mud, thereby improving the ability of the two sides of the arrangement to resist the scouring of large water flows.

4. The underwater laying device under high flow velocity according to claim 3, characterized in that, The two pressure plate assemblies are mirror images of the central axis of the arrangement, and the pressure plate is 5-15 cm away from the edge of the adjacent side of the arrangement.

5. The underwater laying device under high flow velocity according to claim 3, characterized in that, The pressure plate has a disc-shaped structure. The rotation of the drum drives the rotating shaft to rotate via a connecting rod, and the rotating shaft drives the pressure plate to rotate.

6. The underwater laying device under high flow velocity according to claim 3, characterized in that, A pressure roller is provided between the two pressure plate assemblies. The two ends of the pressure roller are respectively connected to the two rotating shafts. The pressure roller presses the middle part of the arrangement into contact with the mud surface.

7. The underwater laying device under high flow velocity according to claim 3, characterized in that, The diameter of the pressure plate and the weight of the counterweight are configured according to the geological conditions of the construction area, so that the pressure plate can press the two sides of the arrangement into the mud to a depth of 10-15cm.

8. The underwater laying device under high flow velocity according to claim 1, characterized in that, The fabric roll is bound with a slipknot rope so that the second ballast member and the fabric roll form a whole.

Images