Submarine pipe ditch backfilling device and method

Abstract

The invention relates to a seabed pipe ditch backfilling device and method, the device comprises a vehicle body, a silt adhesion treatment tank, a silt suction device and an adhesion silt fluid output device, the silt adhesion treatment tank is arranged on the vehicle body, and the silt suction device is communicated with an inlet of the silt adhesion treatment tank; the cohesive sediment fluid output device is communicated with an outlet of the sediment suction device; wherein the sediment suction device is used for sucking sediment fluid near a submarine pipe ditch; the silt adhesion treatment tank is used for adding an adhesive into the silt fluid so as to increase the viscosity of the silt fluid and change the silt fluid into viscous silt fluid; and the viscous sediment fluid output device is used for conveying the viscous sediment fluid to the ditch wall and the ditch bottom of the seabed pipe ditch.

Description

Technical Field

[0001] The present invention relates to the field of ocean engineering equipment, and particularly relates to a device and method for backfilling a submarine trench. Background Art

[0002] In recent years, ocean development has become increasingly frequent, and the construction of submarine facilities has also become more diverse. Subsequently, new related problems in the operation of facilities urgently need to be solved by people. In the construction of submarine facilities, the safety of submarine pipelines is particularly important. To effectively protect the safe operation of submarine pipelines and prevent them from being damaged by activities such as dropping anchors and dragging anchors, trenching and burying submarine pipelines is a very effective protective measure.

[0003] In short, there is currently a lack of a device for backfilling submarine trenches. Summary of the Invention

[0004] Aiming at the above problems, the purpose of the present invention is to provide a device and method for backfilling a submarine trench to solve the problem that there is currently a lack of a device for backfilling a submarine trench.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: In the first aspect, the present invention discloses a device for backfilling a submarine trench, including a vehicle body, a sediment addition and viscosity treatment tank arranged on the vehicle body, a sediment suction device connected to the inlet of the sediment addition and viscosity treatment tank; a viscous sediment fluid output device connected to the outlet of the sediment suction device; wherein, the sediment suction device is used to suck the sediment fluid near the submarine trench; the sediment addition and viscosity treatment tank is used to add a binder to the sediment fluid to increase the viscosity of the sediment fluid and turn the sediment fluid into a viscous sediment fluid; the viscous sediment fluid output device is used to transport the viscous sediment fluid to the trench wall and trench bottom of the submarine trench.

[0006] Furthermore, the vehicle body is equipped with a pair of crawler wheels; a bionic octopus manipulator is arranged in front of the vehicle body to clear the obstacles in front of the vehicle body; the vehicle body is equipped with a lighting camera to provide lighting and recording for the operation of the vehicle body.

[0007] Furthermore, the sediment adding and sticking treatment tank includes a tank body. A filtering partition is arranged at the lower part of the tank body, and a plurality of drain grooves are arranged below the filtering partition; a binder adding mechanism is arranged above the filtering partition, a binder tank is arranged inside the upper part of the tank body, and the outlet of the binder tank is communicated with the inlet of the binder adding mechanism; a sediment inlet is arranged at the upper part of the tank body, and a sediment outlet is arranged on the tank wall of the tank body near the filtering partition and above the filtering partition; a return port is arranged on the tank wall of the tank body below the filtering partition, and the return port is communicated with each of the plurality of drain grooves.

[0008] Furthermore, the binder tank is used for storing biodegradable mucus and is configured with a binder inlet; Furthermore, a switching valve is arranged at the sediment outlet.

[0009] Furthermore, the binder adding mechanism includes a main pipe and a plurality of branch pipes. The plurality of branch pipes are arranged on the main pipe in the four directions of front, rear, left, and right, and two adjacent branch pipes are arranged staggeredly in the four directions of front, rear, left, and right; the bottom end of each branch pipe inclines downward, and a plurality of first discharge holes are arranged on the pipe wall of each branch pipe.

[0010] Furthermore, the sediment suction device includes a vortex generator. The suction port of the vortex generator faces the vicinity of the submarine trench, and is used for sucking the sediment fluid near the submarine trench; the outlet of the vortex generator is communicated with the sediment inlet of the tank body.

[0011] Furthermore, the sticky sediment fluid output device includes a telescopic pipe part and a bendable pipe part. The telescopic pipe part is an extendable and retractable rubber pipe, including a plurality of unit joints. The plurality of unit joints are nested in sequence, and the inner diameters of the plurality of unit joints decrease in sequence from outside to inside; the bendable pipe part is a flexible body joint formed by sequentially hinging several unit pipes end to end, and two adjacent unit pipes can turn and communicate with each other; the inlet end of the telescopic pipe part is communicated with the sediment outlet of the tank body, the outlet end of the telescopic pipe part is communicated with the inlet end of the bendable pipe part, and a plurality of second discharge holes are respectively arranged on the pipe wall of each unit pipe of the bendable pipe part.

[0012] In a second aspect, the present invention also discloses a method for backfilling a submarine trench, which adopts the above-mentioned submarine trench backfilling device, and includes: Step A: The vehicle body travels to the submarine trench to be backfilled; Step B: Start the sediment suction device. The vortex generator sucks the sediment fluid near the submarine trench, and the sediment fluid enters the sediment adding and sticking treatment tank through the sediment inlet; Step C: The sediment adding-viscosity treatment tank adds a binder to the sediment fluid, increasing the viscosity of the sediment fluid and turning the sediment fluid into a viscous sediment fluid. Step D: Open the switching valve at the sediment outlet. The viscous sediment fluid flows out from the sediment outlet, and the viscous sediment fluid is output through the adding-viscosity sediment fluid output device and conveyed to the side wall or bottom of the submarine trench.

[0013] In Step C, while the sediment fluid enters the tank through the sediment inlet and falls onto the filter partition, the binder in the binder tank is added to the sediment fluid above the filter partition through the binder adding mechanism, adding the binder to the sediment fluid and turning the sediment fluid into a viscous sediment fluid.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention discloses a submarine trench backfilling device, including a vehicle body, a sediment adding-viscosity treatment tank, a sediment suction device, and an adding-viscosity sediment fluid output device. The sediment adding-viscosity treatment tank is arranged on the vehicle body. The sediment suction device is communicated with the inlet of the sediment adding-viscosity treatment tank; the adding-viscosity sediment fluid output device is communicated with the outlet of the sediment suction device. Among them, the sediment suction device is used to suck the sediment fluid near the submarine trench; the sediment adding-viscosity treatment tank is used to add a binder to the sediment fluid to increase the viscosity of the sediment fluid and turn the sediment fluid into a viscous sediment fluid; the adding-viscosity sediment fluid output device is used to convey the viscous sediment fluid to the trench wall and trench bottom of the submarine trench.

[0015] (2) The present invention discloses a submarine trench backfilling method, including: Step A: The vehicle body travels to the submarine trench to be backfilled; Step B: Start the sediment suction device, and the eddy current generator sucks the sediment fluid near the submarine trench. The sediment fluid enters the sediment adding-viscosity treatment tank through the sediment inlet; Step C: The sediment adding-viscosity treatment tank adds a binder to the sediment fluid, increasing the viscosity of the sediment fluid and turning the sediment fluid into a viscous sediment fluid; Step D: Open the switching valve at the sediment outlet. The viscous sediment fluid flows out from the sediment outlet, and the viscous sediment fluid is output through the adding-viscosity sediment fluid output device and conveyed to the side wall or bottom of the submarine trench. The present invention discloses a submarine trench backfilling method, which extracts the free sediment near the submarine trench for separation, adds bonding and solidification, and sinks it into the trench. This not only slows down the scouring of the sediment in the trench by the sea current, but also is beneficial to the backfilling of the post-excavation pipeline and the exposed pipeline after detection, effectively utilizes the free sediment, and forms an anti-scouring trench slope, which has practical engineering significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is the front view of the seabed trench backfilling device provided in Embodiment 1 of the present invention; Figure 2 It is the side view of the seabed trench backfilling device provided in Embodiment 1 of the present invention; Figure 3 It is the axonometric drawing of the seabed trench backfilling device provided in Embodiment 1 of the present invention; Figure 4 It is the schematic structural diagram of the binder adding mechanism inside the tank body of the sediment viscosity increasing treatment tank provided in Embodiment 1 of the present invention; Figure 5 It is the plane schematic diagram of the filter partition provided in Embodiment 1 of the present invention; Figure 6 It is the elevation view of the binder adding mechanism provided in Embodiment 1 of the present invention; Figure 7 It is the top view of the binder adding mechanism provided in Embodiment 1 of the present invention.

[0017] Explanation of reference numerals: 1 - vehicle body, 10 - crawler wheel, 2 - sediment viscosity increasing treatment tank, 20 - tank body, 21 - filter partition, 210 - filter hole; 22 - drainage groove, 23 - binder adding mechanism, 230 - main pipe, 231 - multiple branch pipes, 232 - first discharge hole; 24 - binder tank, 25 - switch valve; 3 - sediment suction device, 4 - viscosity increasing sediment fluid output device, 41 - telescopic pipe part, 42 - bendable pipe part, 43 - second discharge hole; 5 - bionic octopus manipulator. Detailed implementation manners

[0018] Hereinafter, the exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0019] In order to solve the problem of the current lack of a device for backfilling submarine trenches, the present invention discloses a submarine trench backfilling device, which includes a vehicle body, a sediment viscosity-increasing treatment tank, a sediment suction device, and a viscous sediment fluid output device. The sediment viscosity-increasing treatment tank is arranged on the vehicle body, and the sediment suction device is communicated with the inlet of the sediment viscosity-increasing treatment tank; the viscous sediment fluid output device is communicated with the outlet of the sediment suction device; wherein, the sediment suction device is used for sucking the sediment fluid near the submarine trench; the sediment viscosity-increasing treatment tank is used for adding a binder to the sediment fluid to increase the viscosity of the sediment fluid and turn the sediment fluid into a viscous sediment fluid; the viscous sediment fluid output device is used for transporting the viscous sediment fluid to the trench wall and the trench bottom of the submarine trench.

[0020] Embodiment 1: A submarine trench backfilling device Embodiment 1 of the present invention provides a submarine trench backfilling device, and its structure will be described in detail below with reference to the accompanying drawings.

[0021] Refer to Figures 1 to 3 , the submarine trench backfilling device includes: A vehicle body 1, A sediment viscosity-increasing treatment tank 2, arranged on the vehicle body 1, A sediment suction device 3, communicated with the inlet of the sediment viscosity-increasing treatment tank 2; A viscous sediment fluid output device 4, communicated with the outlet of the sediment suction device 3; Wherein, the sediment suction device 3 is used for sucking the sediment fluid near the submarine trench; The sediment viscosity-increasing treatment tank 2 is used for adding a binder to the sediment fluid to increase the viscosity of the sediment fluid and turn the sediment fluid into a viscous sediment fluid; The viscous sediment fluid output device 4 is used for transporting the viscous sediment fluid to the trench wall and the trench bottom of the submarine trench.

[0022] Specifically, the submarine trench is used for laying submarine pipelines. After the submarine trench is dug, the buried depth is insufficient. If it is not backfilled continuously, it will affect the safety of the oil and gas transportation pipeline. Among them, the vehicle body 1 is located on one side of the submarine trench and is used for quickly backfilling the sediment along the submarine trench into the dug submarine trench to increase the backfilling depth of the submarine trench per unit time.

[0023] In order to facilitate the movement of the vehicle body 1 near the submarine trench, the vehicle body 1 is configured with a pair of crawler wheels 10.

[0024] To clear the obstacles in front of the vehicle body 1, a bionic octopus manipulator 5 is arranged in front of the vehicle body 1. The bionic octopus manipulator 5 is an existing mature technology. For details, refer to the Chinese invention patent "A Soft Electrostatic Adhesion Coated Bionic Octopus Manipulator" with the document number CN112976029A.

[0025] To provide lighting and recording for the operation of the vehicle body 1, the vehicle body 1 is equipped with a lighting camera.

[0026] The vehicle body 1 sweeps away the obstacles on the advancing route through the bionic octopus manipulator 5, and the vehicle body 1 moves near the submarine trench through the crawler wheels 10.

[0027] As a specific implementation manner, refer to Figure 4 , the sediment adding viscosity treatment tank 2 includes a tank body 20. A filter partition 21 is arranged at the lower part of the tank body 20, and multiple drainage grooves 22 are arranged below the filter partition 21; A binder adding mechanism 23 is arranged above the filter partition 21. A binder tank 24 is arranged inside the upper part of the tank body 20. Among them, the binder tank 24 is used to store biodegradable mucus and is equipped with a binder inlet; the outlet of the binder tank 24 is communicated with the inlet of the binder adding mechanism 23; The upper part of the tank body 20 is provided with a sediment inlet, and a sediment outlet is arranged on the tank wall of the tank body 20 near the filter partition 21 and above the filter partition 21; A return port is arranged on the tank wall of the tank body 20 below the filter partition 21, and the return port is communicated with multiple drainage grooves 22.

[0028] Specifically, refer to Figure 5 , the filter partition 21 is densely provided with filter holes 210.

[0029] For the convenience of control, the viscous sediment fluid flows out from the sediment outlet of the tank body 20, and a switching valve 25 is arranged at the sediment outlet.

[0030] The specific operation method is: open the switching valve 25 at the sediment outlet, and the viscous sediment fluid flows out from the sediment outlet; the viscous sediment fluid is output through the viscous sediment fluid output device 4 and transported to the wall and bottom of the submarine trench.

[0031] Refer to Figure 6 and Figure 7 , the binder adding mechanism 23 includes a main pipe 230 and multiple branch pipes 231, The multiple branch pipes 231 are arranged on the main pipe 230 in the four directions of front, rear, left, and right, and two adjacent branch pipes 231 are arranged staggeredly in the four directions of front, rear, left, and right; The bottom end of each branch pipe 231 inclines downward, and a plurality of first discharge holes 232 are arranged on the pipe wall of each branch pipe 231.

[0032] As a specific implementation manner, the sediment suction device 3 includes a vortex generator, the suction port of the vortex generator faces near the submarine trench, and is used for sucking the sediment fluid near the submarine trench; the outlet of the vortex generator is communicated with the sediment inlet of the tank body 20.

[0033] As a specific implementation manner, continue to refer to Figures 1 to 3 , the viscous sediment fluid output device 4 includes a telescopic pipe portion 41 and a bendable pipe portion 42, The telescopic pipe portion 41 is a rubber pipe that can be elongated and shortened, The bendable pipe portion 42 is a flexible body segment formed by sequentially hinging a plurality of unit pipes end to end, and adjacent unit pipes can turn and communicate with each other; The inlet end of the telescopic pipe portion 41 is communicated with the sediment outlet of the tank body 20, the outlet end of the telescopic pipe portion 41 is communicated with the inlet end of the bendable pipe portion 42, and a plurality of second discharge holes 43 are respectively arranged on the pipe wall of each unit pipe of the bendable pipe portion 42.

[0034] Embodiment 2: A method for backfilling a submarine trench Embodiment 2 of the present invention provides a method for backfilling a submarine trench, which adopts the submarine trench backfilling device of Embodiment 1. The method includes: Step A: The vehicle body 1 travels to the submarine trench to be backfilled; Step B: Start the sediment suction device 3, and the vortex generator sucks the sediment fluid near the submarine trench. The sediment fluid enters the sediment viscosity-increasing treatment tank 2 through the sediment inlet; Step C: The sediment viscosity-increasing treatment tank 2 adds a binder to the sediment fluid to increase the viscosity of the sediment fluid and turn the sediment fluid into a viscous sediment fluid; Specifically, when the sediment fluid enters the tank body 20 through the sediment inlet and falls onto the filter partition 21, the binder in the binder tank 24 is added to the sediment fluid above the filter partition 21 through the binder adding mechanism 23, and the binder is added to the sediment fluid to turn the sediment fluid into a viscous sediment fluid; Step D: Open the switch valve 25 at the sediment outlet, the viscous sediment fluid flows out from the sediment outlet, and the viscous sediment fluid is output through the viscous sediment fluid output device 4 and transported to the side wall or bottom of the submarine trench.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A submarine pipeline trench backfilling device, characterized in that, including a vehicle body (1), a sediment adding-viscosity treatment tank (2) arranged on the vehicle body (1), a sediment suction device (3) communicating with the inlet of the sediment adding-viscosity treatment tank (2); a viscous sediment fluid output device (4) communicating with the outlet of the sediment suction device (3); wherein, the sediment suction device (3) is used for sucking the sediment fluid near the submarine trench; the sediment adding-viscosity treatment tank (2) is used for adding a binder to the sediment fluid to increase the viscosity of the sediment fluid, so that the sediment fluid becomes a viscous sediment fluid; the viscous sediment fluid output device (4) is used for transporting the viscous sediment fluid to the trench wall and trench bottom of the submarine trench.

2. The submarine trench backfilling device according to claim 1, characterized in that the vehicle body (1) is configured with a pair of crawler wheels (10); a bionic octopus manipulator (5) is arranged in front of the vehicle body (1) for clearing the obstacles in front of the vehicle body (1); the vehicle body (1) is configured with a lighting camera for providing lighting and recording for the operation of the vehicle body (1).

3. The submarine trench backfilling device according to claim 1, characterized in that the sediment adding-viscosity treatment tank (2) includes a tank body (20), a filter partition (21) is arranged at the lower part of the tank body (20), and a plurality of drainage grooves (22) are arranged below the filter partition (21); a binder adding mechanism (23) is arranged above the filter partition (21), a binder tank (24) is arranged inside the upper part of the tank body (20), and the outlet of the binder tank (24) is communicated with the inlet of the binder adding mechanism (23); a sediment inlet is arranged at the upper part of the tank body (20), and a sediment outlet is arranged on the tank wall of the tank body (20) near the filter partition (21) and above the filter partition (21); a return port is arranged on the tank wall of the tank body (20) below the filter partition (21), and the return port is communicated with each of the plurality of drainage grooves (22).

4. The submarine trench backfilling device according to claim 3, characterized in that the binder tank (24) is used for storing biodegradable mucus and is configured with a binder inlet.

5. The submarine trench backfilling device according to claim 3, characterized in that a switching valve (25) is arranged at the sediment outlet.

6. The submarine trench backfilling device according to claim 3, characterized in that the binder adding mechanism (23) includes a main pipe (230) and a plurality of branch pipes (231), the plurality of branch pipes (231) are arranged on the main pipe (230) in the front, rear, left and right four directions, and two adjacent branch pipes (231) are arranged staggeredly in the front, rear, left and right four directions; the bottom end of each branch pipe (231) inclines downward, and a plurality of first discharge holes (232) are arranged on the pipe wall of each branch pipe (231).

7. The submarine trench backfilling device according to claim 3, characterized in that The sediment suction device (3) includes a vortex generator, and the suction port of the vortex generator faces the vicinity of the submarine trench, and is used for sucking the sediment fluid near the submarine trench; The outlet of the vortex generator is communicated with the sediment inlet of the tank body (20).

8. The submarine trench backfilling device according to claim 3, wherein The viscous sediment fluid output device (4) includes a telescopic pipe portion (41) and a bendable pipe portion (42), The telescopic pipe portion (41) is an elongatable and contractible rubber pipe, including a plurality of unit joints, the plurality of unit joints are nested in sequence, and the inner diameters of the plurality of unit joints decrease in sequence from the outside to the inside; The bendable pipe portion (42) is a flexible body joint formed by sequentially hinging the heads and tails of several unit pipes, and a turn can be achieved between two adjacent unit pipes and they are communicated with each other; The inlet end of the telescopic pipe portion (41) is communicated with the sediment outlet of the tank body (20), the outlet end of the telescopic pipe portion (41) is communicated with the inlet end of the bendable pipe portion (42), and a plurality of second discharge holes (43) are respectively arranged on the pipe wall of each unit pipe of the bendable pipe portion (42).

9. A method for backfilling a submarine pipeline trench, which uses the submarine pipeline trench backfilling device described in any one of claims 1 to 8, is characterized in that Comprising: Step A: The vehicle body (1) travels to the submarine trench to be backfilled; Step B: Start the sediment suction device (3), the vortex generator sucks the sediment fluid near the submarine trench, and the sediment fluid enters the sediment viscosity-increasing treatment tank (2) through the sediment inlet; Step C: The sediment viscosity-increasing treatment tank (2) adds a binder to the sediment fluid to increase the viscosity of the sediment fluid, so that the sediment fluid becomes a viscous sediment fluid; Step D: Open the switch valve (25) at the sediment outlet, the viscous sediment fluid flows out from the sediment outlet, and the viscous sediment fluid is output through the viscous sediment fluid output device (4) and transported to the side wall or bottom of the submarine trench.

10. The submarine trench backfilling method according to claim 9, wherein In the step C, while the sediment fluid enters the tank body (20) through the sediment inlet and falls onto the filter partition plate (21), the binder in the binder tank (24) is added to the sediment fluid above the filter partition plate (21) through the binder adding mechanism (23), and the binder is added to the sediment fluid to make the sediment fluid become a viscous sediment fluid.

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