Foundation of bionic suction bucket of swim bladder of deep-sea fish, and working method thereof

Abstract

To provide a foundation of a bionic suction bucket of a swim bladder of a deep-sea fish, and a working method thereof.SOLUTION: When it is necessary to push a foundation of a suction bucket into sea-bottom soil, a charge valve is closed, an annular air bag is held in an empty state, an upper end of a marine hose is connected to a suction pump, the valve is opened, the suction pump is opened, water is pumped from an inside of a bucket body with the suction pump, the bucket body is pushed into the sea-bottom soil until a bucket lid and a surface of the seabed soil are flush with each other, and the valve is closed. When it is necessary to pull out the foundation of the suction bucket from the seabed soil, the upper end of the marine hose is connected to an inflation pump, the valve and the charge valve are opened, gas enters the annular air bag and enters downward into an inside of the bucket body by pressurizing and inflating the marine hose, the charge valve is closed until the annular air bag is fully inflated, and the annular air bag uses the bucket body to gradually pull the foundation of the suction bucket out of the sea-bottom soil.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to the technical field of ocean engineering, specifically to a suction bucket-shaped foundation structure applied to the fixed foundation of the underwater soil part of ocean construction.

Background Art

[0002] Currently, as a new foundation type, the suction bucket foundation has a relatively simple structure and is easy to install, so it can be flexibly applied in various sea areas. Therefore, it is widely used in current international ocean engineering. It has many advantages such as high economic efficiency, easy construction, little impact on the weather during construction, and recyclability, and has achieved success in offshore wind power projects. The suction bucket is a steel bucket-shaped structure with an open bottom and a closed top. During installation, after the suction bucket sinks to a certain depth on the seabed under its own weight, water is pumped out of the bucket to create a pressure difference inside and outside, and the bottom of the bucket sinks to the designed depth. After the suction bucket sinks and is installed, the pumping of water is stopped and the upper pumping port is closed. When it is necessary to recover the foundation, water is pumped into the bucket by a pump, and the foundation of the bucket is pulled out from the seabed soil by the buoyancy of water and the pressure of gas. During use, the suction bucket meets the pull-out resistance of the foundation due to the friction between the soil on the foundation side, its own weight, the adsorption force of the soil at the bucket end, etc. Therefore, during recovery, especially in the case of recovering deep-sea suction buckets, it is difficult to pull out the foundation of the suction bucket from the seabed soil due to factors such as the friction of the seabed soil and its own weight.

[0003] The document with the Chinese Utility Model Publication Number CN217460662U discloses a "floating suction bucket" that increases the self-weight of the floating suction bucket by adding water into the suction bucket, quickly discharges the gas in the airbag through an exhaust mechanism installed inside the floating suction bucket, reduces the buoyancy of the floating suction bucket, and speeds up the sinking speed of the floating suction bucket. However, there are still problems with the recovery of the suction bucket. The inside of the suction bucket is filled with water, and since the airbag is discharged during sinking, it is impossible to lift and recover the suction bucket by changing the buoyancy during recovery. It can be seen that it is necessary to improve the structure of the conventional suction bucket foundation and design a suction bucket foundation that can be easily recovered without changing the structural support force and stability. The document with the Chinese Patent Publication Number CN115855232A discloses a high-performance and low-cost fiber optic acoustic sensor that can flexibly switch its operating state by filling air or water into the cavity of the sensor and can be used both underwater and on land, but it only applies the bionics of the fish's swim bladder to the sensor and does not involve the suction bucket, namely, a "fish swim bladder bionic amphibious fiber optic marine acoustic sensor".

Summary of the Invention

Problems to be Solved by the Invention

[0004] The object of the present invention is to solve the deficiencies of the existing suction bucket technology and provide a foundation and its working method for a bionic suction bucket of the swim bladder of deep-sea fish, which can simulate the situation where the fish inflates the swim bladder and floats, and utilize the buoyancy of water to make it easier to pull out the suction bucket from the seabed soil without changing the structural support force and stability.

Means for Solving the Problems

[0005] To achieve the above object, the present invention adopts the following technical solutions on the basis of the biionic suction bucket of the floating bag of deep-sea fish. There is a bucket body with an open lower end and a closed upper end by a bucket lid. A steel pipe penetrates the bucket lid from above the upper part of the bucket lid downward, closely connecting the bucket lid. Above the upper part of the bucket lid, a ring of an annular lattice steel cage arranged outside the steel pipe is provided. The bottom of the annular lattice steel cage is closely connected to the bucket lid, and the upper part is fixedly connected to the steel pipe. In the center of the annular lattice steel cage, a ring of an annular groove is provided. In the annular groove, an annular airbag in an empty state is accommodated. After the annular airbag is inflated, it contacts the annular lattice steel cage. The annular airbag surrounds the side wall around the steel pipe. A charging valve is connected to the annular airbag. The charging valve extends from the side wall of the steel pipe into the interior of the steel pipe, airtightly connecting the steel pipe. The upper end of the steel pipe is closely connected to the lower end of a marine hose. A valve is provided at the lower end of the marine hose. The steel pipe is connected to a suction pump or an inflation pump via the marine hose.

[0006] Furthermore, mooring holes are provided at the side edge of the bucket body, and an anchor chain is moored in the mooring holes.

[0007] Furthermore, the mass of water displaced by the annular airbag filled with gas is more than 2 / 3 of the self-weight of the bucket body.

[0008] For the working method based on the above biionic suction bucket of the floating bag of deep-sea fish, the following technical solutions are adopted.

[0009] When it is necessary to push the foundation of the suction bucket into the seabed soil, close the charging valve, keep the annular airbag in an empty state, connect the upper end of the marine hose to the suction pump, open the valve, then open the suction pump, pump water out of the bucket body from the suction pump, push the bucket body into the seabed soil until the bucket lid and the surface of the seabed soil are on the same plane, and close the valve.

[0010] When it is necessary to pull out the foundation of the suction bucket from the seabed soil, connect the upper end of the offshore hose to the air pump, open the valve and the charging valve, pressurize and inflate through the offshore hose, so that the gas enters the annular airbag and then enters the inside of the bucket body downward. Close the charging valve until the annular airbag is fully inflated, and the annular airbag drives the bucket body to gradually pull out from the seabed soil.

[0011] Furthermore, when the height of the bucket body pulled out from the seabed soil reaches 2 / 3 of the total height of the bucket body, connect it to the anchor chain at the mooring hole on the side edge of the bucket body by a lifting device.

Advantages of the Invention

[0012] The present invention has the following beneficial effects by the above technical solutions.

[0013] The present invention provides a suction bucket with an airbag device that utilizes the mechanism of fish inflating a floating bag to float in the deep sea. When it is necessary to recover the foundation of the suction bucket at sea, gas is pushed into the airbag, and the airbag is inflated, pressurized, and expanded, simulating the situation where fish inflate a floating bag to float. Utilizing the buoyancy of seawater, the entire foundation of the suction bucket is easily pulled out from the seabed soil. The foundation of the suction bucket is convenient for recovery, while its structure and operation are simple and the cost is low. Therefore, the cost for recovery is saved, labor is saved, the time for the operation of recovering the suction bucket at sea is significantly shortened, the recovery of the deep-sea suction bucket is made easier, and the problem of difficult recovery of the deep-sea suction bucket is solved. At the same time, the economic cost, infrastructure construction volume, and labor cost required for the recovery of the deep-sea suction bucket are significantly reduced, the recovery by pulling up the suction bucket in the deep sea is realized, the construction quality is controllable, and it is very important in the field of engineering.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0015] The present invention will be further described below in conjunction with the drawings and specific embodiments. It should be understood that the following specific embodiments are used only for explaining the present invention and are not intended to limit the scope of the present invention.

[0016] Referring to FIGS. 1 and 2, the base of the bionic suction bucket of the floating bag of the deep-sea fish of the present invention includes a bucket body 2. The bucket body 2 is a hollow cylindrical shape with a through hole at the lower end. The lower end of the bucket body 2 is open, and the upper end is closed and fixed by a bucket lid 1. A mooring hole 8 is provided on the side edge of the bucket body 2, and an anchor chain is moored in the mooring hole 8 to facilitate pulling out the base structure of the suction bucket from the seabed soil when recovering at sea.

[0017] A through hole penetrating the inside of the bucket body 2 is provided at the center of the bucket lid 1. A steel pipe 3 is embedded in the through hole, and the steel pipe 3 is vertically and closely connected to the bucket lid 1. The steel pipe 3 penetrates the through hole on the bucket lid 1 from above the upper part of the bucket lid 1 downward and penetrates the inside of the bucket body 2. The upper end of the steel pipe 3 is closely connected to the lower end of the offshore hose 9, and a valve 4 is attached to the lower end of the offshore hose 9.

[0018] Above the upper part of the bucket lid 1, a ring of an annular lattice steel cage 7 is provided. The annular lattice steel cage 7 is arranged outside the steel pipe 3. The bottom of the annular lattice steel cage 7 is closely connected to the upper surface of the bucket lid 1, and the upper part is fixedly connected to the steel pipe 3 and can be fixed to the steel pipe 3 by welding. The height of the steel pipe 3 is slightly higher than the height of the annular lattice steel cage 7 and is used for connecting to the offshore hose 9 when the valve 4 is opened.

[0019] In the center of the annular lattice steel cage 7, a ring of an annular groove is provided. An annular airbag 5 in an empty state is accommodated in the annular groove. After the annular airbag 5 is inflated, it contacts the annular lattice steel cage 7. When the annular airbag 5 expands, it can support the annular lattice steel cage 7 and exert a force on the annular lattice steel cage 7.

[0020] The annular airbag 5 surrounds the side wall around the steel pipe 3. A charging valve 6 is connected to the annular airbag 5. The charging valve 6 extends from the side wall of the steel pipe 3 into the interior of the steel pipe 3. By being hermetically connected between the charging valve 6 and the steel pipe 3, the steel pipe 3 becomes the inflation pipe of the annular airbag 5, and gas can enter from the steel pipe 3. By controlling the charging valve 6, it is possible to inflate and exhaust the annular airbag 5.

[0021] When the valve 4 is opened, the bucket body 2 sucks up the internal water through the offshore hose 9, sinks and exhausts air, and then floats up, thereby sinking the bucket body 2. The valve 4 connected to the offshore hose 9 controls the interior of the bucket body 2, sucks up water to the entire base of the suction bucket, sinks and exhausts air, and then floats up, and is used to adjust the water pressure and air pressure, which are the necessary conditions for the entire base of the suction bucket.

[0022] The annular airbag 5 is required to prevent erosion of the airbag by seawater. When not in use, it floats in the annular groove of the annular lattice steel cage 7 in a deflated state. After being inflated during use, it simulates the state where the fish inflates the floating bag and floats upward, transmits force to the annular lattice steel cage 7, and then to the bucket body 2, and is pulled out from the seabed soil. The annular airbag 5 has excellent elasticity and is connected to the steel pipe 3 via the charging valve 6.

[0023] When the annular airbag 5 filled with gas is fully inflated during operation, the mass of the water displaced should reach at least 2 / 3 or more of the self-weight of the bucket body 2, thereby reducing the overall gravity of the floating bag bionic suction bucket foundation, making it easier to be pulled out from the seabed soil and achieving the purpose of easy extraction.

[0024] The outer diameter of the annular lattice steel cage 7 is equal to the outer diameter of the bucket body 2. Since the annular lattice steel cage 7 is lattice-shaped, it has water permeability and is formed of an anti-rust material, so it is not easily corroded by seawater and damaged in structure, has good rigidity, and is not easily deformed when pressed in deep water. The annular lattice steel cage 7 can support it when the annular airbag 5 is inflated and expanded. The height of the steel pipe 3 is slightly higher than the height of the annular lattice steel cage 7, which facilitates the connection between the steel pipe 3 and the flow path of the offshore hose 9. The upper end of the above-mentioned offshore hose 9 is connected to different pumps in different working states, connected to the suction pump during the sinking of the suction bucket, and connected to the inflation pump during the recovery of the suction bucket.

[0025] The following steps are adopted in the operation of the foundation of the bionic suction bucket of the floating bag of the deep-sea fish of the present invention.

[0026] In Step 1, as shown in FIG. 5, when it is necessary to push the foundation of the suction bucket into the seabed soil 10, use the crane on the workboat to lift the entire foundation of the suction bucket with the lower end of the bucket body 2 open downward, slowly place the entire foundation of the suction bucket underwater, and let it sink under its own weight until it can no longer sink under its own weight.

[0027] In Step 2, close the charging valve 6, keep the annular airbag 5 empty, connect the upper end of the offshore hose 9 to the suction pump as shown in Fig. 3, open the valve 4, and then open the suction pump. During the operation of the suction pump, pump water out from the inside of the bucket body 2, and push the bucket body 2 into the seabed soil 10 due to the internal and external pressure difference. When the surfaces of the bucket lid 1 and the seabed soil 10 are on the same plane, when pushing the bucket body 2 to the lowest position, close the valve 4 as shown in Fig. 6.

[0028] In Step 3, when it is necessary to pull out the foundation of the suction bucket from the seabed soil 10, connect the upper end of the offshore hose 9 to the inflation pump, open the valve 4 and the charging valve 6 at the same time. Pressurize and inflate through the offshore hose 9, and the gas enters the annular airbag 5 through the steel pipe 3. At the same time, the gas enters the inside of the bucket body 2 downward. Apply force to the seabed soil 10 at the bottom of the bucket body 2 until the annular airbag 5 is fully inflated, and then close the charging valve 6 as shown in Fig. 4. At that time, the annular airbag 5 expands to provide a huge buoyancy force, drive the bucket body 2 to pull it out from the seabed soil 10, keep the valve 4 open, continue to inflate, and the seawater is generated by the buoyancy force of the annular airbag 5 and the reaction force generated by the gas on the seabed soil 10 at the bottom of the bucket body 2 to lift and recover the entire foundation of the suction bucket.

[0029] When the height of the bucket body 2 pulled out from the seabed soil 10 reaches 2 / 3 of the total height of the bucket body, continue to inflate and connect it to the anchor chain at the mooring hole 8 on the side edge of the bucket body 2 by the lifting device to gently improve the lifting force.

[0030] When pulling out the foundation of the suction bucket from the seabed soil 10, close the valve 4 connected to the pump 4 and the offshore hose 9, and finally recover the entire foundation structure of the suction bucket to the ship by the lifting device.

[0031] Above, the basic mechanism, main features, and advantages of the present invention have been disclosed and explained. However, the above are only specific embodiments of the present invention, and the technical features of the present invention are not limited thereto. Other embodiments derived by those skilled in the art without departing from the technical solution of the present invention are also included within the patent scope of the present invention.

Description of Reference Numerals

[0032] 1 Bucket lid 2 Bucket body 3 Steel pipe 4 Valve 5 Annular airbag 6 Charge valve 7 Annular lattice steel cage 8 Mooring hole 9 Marine hose 10 Seabed soil

Claims

1. The base of a deep-sea fish swim bladder bionic suction bucket has a bucket body (2) whose lower end is open and whose upper end is closed by a bucket lid (1). The steel pipe (3) penetrates the bucket lid (1) from above the upper part of the bucket lid (1) downward, closely connecting the bucket lid (1), and a ring of annular lattice steel cage (7) arranged outside the steel pipe (3) is provided above the upper part of the bucket lid (1), the bottom of the annular lattice steel cage (7) is closely connected to the bucket lid (1), and the upper part is fixedly connected to the steel pipe (3), and a ring of annular groove is provided in the center of the annular lattice steel cage (7), and an empty annular airbag (5) is accommodated in the annular groove, and the annular After the airbag (5) is inflated, it contacts the annular lattice steel cage (7), and the annular airbag (5) surrounds the side wall around the steel pipe (3). A charge valve (6) is connected to the annular airbag (5), and the charge valve (6) extends from the side wall of the steel pipe (3) into the inside of the steel pipe (3) to connect the steel pipe (3) airtightly. The upper end of the steel pipe (3) is tightly connected to the lower end of the marine hose (9). A valve (4) is provided at the lower end of the marine hose (9), and the steel pipe (3) is connected to a suction pump or an inflation pump through the marine hose (9). A mooring hole (8) is provided on the side edge of the bucket body (2), and an anchor chain is moored in the mooring hole (8); When the foundation of the suction bucket needs to be pushed into the seabed soil (10), close the charge valve (6), keep the annular air bag (5) empty, connect the upper end of the marine hose (9) to the suction pump, open the valve (4), and then open the suction pump, which pumps up water from inside the bucket body (2), and pushes the bucket body (2) into the seabed soil until the bucket lid (1) and the surface of the seabed soil are flush with each other, and close the valve (4); When the foundation of the suction bucket needs to be pulled out from the seabed soil (10), the upper end of the marine hose (9) is connected to an air pump, the valve (4) and the charge valve (6) are opened, and the marine hose (9) is pressurized and inflated, so that the gas enters the annular air bag (5) and enters downward into the inside of the bucket body (2), and a force is applied to the seabed soil (10) at the bottom of the bucket body (2) until the annular air bag (5) is fully inflated, and the charge valve (6) is closed, and the annular air bag (5) gradually pulls the bucket body (2) out of the seabed soil, while the valve (4) is kept open and continuously inflated, and the buoyancy generated by seawater on the annular air bag (5) and the reaction force generated by the gas on the seabed soil (10) at the bottom of the bucket body (2) are used to lift and recover the entire foundation of the suction bucket. When the height of the bucket body (2) pulled out from the seabed soil reaches 2 / 3 of the total height of the bucket body (2), the lifting device is used to connect the bucket body (2) to the anchor chain at the mooring hole on the side edge of the bucket body (2). The basis of the bionic suction bucket is the swim bladder of a deep-sea fish.

2. The basis of the deep-sea fish swim bladder bionic suction bucket as claimed in claim 1, characterized in that the mass of water displaced by the gas-filled annular air bag (5) is more than 2 / 3 of the weight of the bucket body (2).

3. The base of the deep-sea fish swim bladder bionic suction bucket according to claim 1, characterized in that the outer diameter of the annular lattice steel cage (7) is equal to the outer diameter of the bucket body (2).

4. The base of the deep-sea fish swim bladder bionic suction bucket according to claim 1, characterized in that the height of the steel pipe (3) is higher than the height of the annular lattice steel cage (7).

5. The basis of the deep-sea fish swim bladder bionic suction bucket according to claim 1, characterized in that the annular lattice steel cage (7) is latticed and made of anti-corrosive material.

6. When the foundation of the suction bucket needs to be pushed into the seabed soil (10), close the charge valve (6), keep the annular air bag (5) empty, connect the upper end of the marine hose (9) to the suction pump, open the valve (4), and then open the suction pump, which pumps up water from inside the bucket body (2), and pushes the bucket body (2) into the seabed soil until the bucket lid (1) and the surface of the seabed soil are flush with each other, and close the valve (4); When the foundation of the suction bucket needs to be pulled out from the seabed soil (10), the upper end of the marine hose (9) is connected to an air pump, the valve (4) and the charge valve (6) are opened, and the marine hose (9) is pressurized and inflated, so that the gas enters the annular air bag (5) and enters downward into the inside of the bucket body (2), and a force is applied to the seabed soil (10) at the bottom of the bucket body (2) until the annular air bag (5) is fully inflated, and the charge valve (6) is closed, and the annular air bag (5) gradually pulls the bucket body (2) out of the seabed soil, while the valve (4) is kept open and continuously inflated, and the buoyancy generated by seawater on the annular air bag (5) and the reaction force generated by the gas on the seabed soil (10) at the bottom of the bucket body (2) are used to lift and recover the entire foundation of the suction bucket. When the height of the bucket body (2) pulled out from the seabed soil reaches 2 / 3 of the total height of the bucket body (2), the lifting device is used to connect the bucket body (2) to the anchor chain at the mooring hole on the side edge of the bucket body (2). The working method of the deep-sea fish swim bladder bionic suction bucket foundation as claimed in claim 1.

7. 7. A method according to claim 6, characterized in that when the base of the suction bucket is extracted from the seabed, the valve (4) and the aeration pump are closed.

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