Underwater oil collecting cover made of composite material

Abstract

The invention provides a composite material underwater oil collecting cover. The composite material underwater oil collecting cover comprises a cover body; a through hole is formed in the top of the cover body and used for being connected with an oil pipe. The cover body is made of a resin-based fiber reinforced composite material; a filter screen; the baffle is arranged at the through hole; the filter screen is made of a resin-based fiber reinforced composite material; horizontal opening pressing is conducted; the cover is arranged on the cover body; and the supporting legs are arranged at the bottom of the cover body and are made of resin-based fiber reinforced composite materials. The composite material underwater oil collecting cover is prepared from a resin-based fiber reinforced composite material, is light in weight, has corrosion resistance, can be repeatedly used, does not need additional anodic protection, reduces the weight of the whole oil collecting cover, also reduces the requirements on a lifting appliance of an oil collecting ship, and can be used as an equipment protection cover.

Description

Technical Field

[0001] The invention belongs to the technical field of underwater oil collecting covers, and in particular relates to a composite material underwater oil collecting cover. Background Art

[0002] The main method of extracting oil from the seabed is to install oil extraction equipment. During drilling, the well wall may be damaged or the extraction equipment may be damaged by other impacts such as anchors, resulting in oil leakage. The oil in cracks on the seabed may also pollute the environment and cause economic losses. Before equipment maintenance work is carried out, an oil recovery vessel is required to perform emergency oil recovery work to avoid continued spread that causes environmental pollution and economic losses. The oil recovery work requires the cooperation of the oil recovery vessel and the oil collection hood. The upper end of the oil collection hood is connected to the electric submersible pump-oil pipeline to connect to the surface oil recovery vessel for oil recovery work.

[0003] The Chinese patent document with publication number CN116683347A discloses an insulating oil recovery device and method, which includes an oil catcher, a first oil pipe, an oil collecting hood and a second oil pipe. The oil catcher is installed at the insulating oil leakage of the submarine cable. The oil catcher is connected to the oil collecting hood through the first oil pipe. The top of the oil collecting hood is provided with a through hole. The through hole of the oil collecting hood is connected to the first end of the second oil pipe. The second end of the second oil pipe is detachably connected to the pumping unit. The device introduces the leaked insulating oil into the oil collecting hood through the first oil pipe, and then connects to the pumping unit through the second oil pipe to pump out the insulating oil in the oil collecting hood. The entire device is installed underwater. There are no obstructions on the water surface before and after the oil pumping, which ensures the navigation safety of ships at sea. However, the oil collecting hoods of the device and the existing oil recovery vessels are usually metal oil collecting hoods, which are mainly divided into integral type and simple type. The integral type is too heavy, and the simple type is not effective in collecting and gathering oil. When dealing with leaks, the oil collecting hood needs to be operated underwater for 10-20 days until the maintenance work is ready and completed. Therefore, in order to ensure the reuse rate of the oil collecting hood, it is necessary to equip the metal oil collecting hood with anode protection to solve the corrosion problem of the oil collecting hood. The configuration of anode protection will increase the complexity and weight of the oil collecting hood, and increase the requirements for the lifting equipment of the oil recovery vessel. In addition, the existing oil collecting hood also has problems such as the easy accumulation of floating objects at the connection with the oil pipe, which causes the pump body to be blocked; the structural stability of the oil collecting hood is insufficient; and the oil collecting hood has a single function. Summary of the invention

[0004] The technical problem solved by the present invention is to provide a composite underwater oil collecting hood, which is made of resin-based fiber-reinforced composite material, is light in weight and has corrosion resistance, can be reused many times, does not require additional anode protection, reduces the weight of the overall oil collecting hood, and reduces the requirements for the lifting equipment of the oil collecting vessel, and can also be used as an equipment protection cover.

[0005] In order to solve the above problems, the present invention provides a composite underwater oil collecting cover, comprising:

[0006] A cover body; a through hole is provided on the top of the cover body, and the through hole is used to connect with the oil pipe; the cover body is a resin-based fiber-reinforced composite material;

[0007] A filter screen is disposed at the through hole; the filter screen is a resin-based fiber-reinforced composite material;

[0008] A horizontal pressure port is provided on the cover body;

[0009] A plurality of supporting legs are arranged at the bottom of the cover body, and the supporting legs are made of resin-based fiber-reinforced composite material.

[0010] Preferably, it also includes a filter cleaning mechanism, which is arranged on the filter; the filter cleaning mechanism includes:

[0011] A cleaning shovel is provided on one side of the filter screen located inside the cover;

[0012] A switch handle is arranged on one side of the filter screen located outside the cover body;

[0013] Transmission assembly: the transmission assembly transmits and connects the cleaning shovel with the switch handle.

[0014] Preferably, the switch handle is provided with a square through slot; the bottom of the cleaning shovel is provided with a square groove;

[0015] The transmission assembly comprises:

[0016] A square fixing platform; located in the square groove of the cleaning shovel, the square fixing platform is provided with an internal thread;

[0017] A rotating protection platform; located above the cleaning shovel; a groove is provided on the top of the rotating protection platform; the groove is suitable for embedding one end of the switch handle;

[0018] A square nut; embedded in the square through slot of the switch handle; the square nut is provided with an internal thread;

[0019] A limit nut; located above the switch handle; the limit nut is provided with an internal thread; the limit nut is also provided with a fastening hole; a fastening pin is provided in the fastening hole;

[0020] Transmission bolt; the transmission bolt sequentially penetrates the square fixing platform, the cleaning shovel, the rotating protection platform, the square nut, and the limit nut to connect the cleaning shovel with the switch handle.

[0021] Preferably, there are two groups of filter cleaning mechanisms, which are respectively located at two locations on the diagonal lines of the filter; and the cleaning shovels of the two groups of filter cleaning mechanisms can fully cover the area of ​​the filter when they rotate.

[0022] Preferably, the cover body is in the shape of a quadrangular pyramid; a reinforcing structure is provided at the side edges of the outer side of the cover body, and the reinforcing structure is a trapezoidal structure that is narrow at the top and wide at the bottom; reinforcing ribs are provided on the outer side of the reinforcing structure; a grid frame inner rib is provided on the inner side of the cover body; the reinforcing structure, the reinforcing ribs and the grid frame inner ribs are all made of resin-based fiber-reinforced composite materials.

[0023] Preferably, an outer flange is provided at the bottom of the reinforcing rib, an inner flange is provided at a corresponding position of the bottom of the cover body, and the outer flange is connected to the inner flange; the top of the supporting leg is connected to the inner flange.

[0024] Preferably, it also includes:

[0025] A supporting leg connecting platform; the supporting leg connecting platform is connected to the inner flange and the outer flange; a supporting leg fixing platform is provided on the supporting leg connecting platform; a supporting leg fixing hole is provided on the supporting leg fixing platform; the supporting leg is connected to the supporting leg fixing hole by bolts; the supporting leg connecting platform is a resin-based fiber reinforced composite material.

[0026] Preferably, the supporting leg fixing platform is integrally formed at the bottom of the supporting leg connecting platform, and three parallel fixed walls are provided inside the supporting leg fixing platform.

[0027] Preferably, three supporting leg fixing holes are respectively provided on two opposite side surfaces of the supporting leg fixing platform; and the positions of the supporting leg fixing holes on the two side surfaces correspond to each other.

[0028] Preferably, the bottom of the supporting leg connecting platform is provided with an opening in the direction in which the supporting legs are opened; and the bottom of the supporting legs is provided with a bottoming plane structure.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The composite underwater oil collecting hood of the present invention has a through hole on the top of the hood body that connects the electric submersible pump-oil pipe to the surface oil collecting ship for operation. The composite underwater oil collecting hood of this embodiment, the hood body, filter screen, and support leg are all made of resin-based fiber-reinforced composite materials. The material density is less than 1 / 4 of that of metal, and it is light in weight and corrosion-resistant, and can be reused many times. In addition, no additional anode protection is required, eliminating the need for anode protection equipment; and it can also be used as an equipment protection cover, the overall weight of the oil collecting hood is reduced, and the requirements for the hoisting equipment of the oil collecting ship are also reduced, which can reduce the cost of processing and collecting oil from the perspective of the hull equipment. The composite material filter screen can filter out a large amount of floating objects to avoid clogging the pump body. In addition, because its material can meet the long-term corrosion resistance problem, the frequency of replacing the filter screen structure can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 12 is a schematic structural diagram of a composite underwater oil collecting cover according to an embodiment of the present invention;

[0032] Figure 2 a is a schematic diagram of the structure of the bottom of the cover body in the composite underwater oil collecting cover according to an embodiment of the present invention, and b is a schematic diagram of the partial cross-section of the column section structure of the top of the cover body in the composite underwater oil collecting cover;

[0033] Figure 3 a is a top view of the cover body in the composite underwater oil collecting cover according to an embodiment of the present invention, b is a structural schematic diagram of the filter screen on the inner side of the top of the cover body; c is a cross-sectional view at AA in a;

[0034] Figure 4 It is a structural schematic diagram of a filter cleaning mechanism in a composite underwater oil collecting hood according to an embodiment of the present invention;

[0035] Figure 5 2 is a schematic structural diagram of the bottom of the composite underwater oil collecting cover according to an embodiment of the present invention;

[0036] Figure 6 This is a state diagram of the composite underwater oil collecting cover according to an embodiment of the present invention during hoisting and floating oil collecting operation;

[0037] Figure 7 This is a state diagram of the composite underwater oil collecting cover according to an embodiment of the present invention when the supporting legs are opened to support the ground;

[0038] Figure 8 This is a state diagram of the composite underwater oil collecting cover according to an embodiment of the present invention when the supporting legs are in a state of extending at four corners;

[0039] Fig. 9 It is a structural schematic diagram of a support leg connection platform in a composite underwater oil collecting hood according to an embodiment of the present invention;

[0040] Fig.10 It is a schematic structural diagram of the bottom of the support leg connection platform in the composite underwater oil collecting hood described in an embodiment of the present invention.

[0041] Among them: 1-cover body; 2-filter screen; 3-transparent horizontal pressure port; 4-support leg; 5-column section structure; 6-clearing shovel; 7-switch handle; 8-square fixing platform; 9-rotating protection platform; 10-square nut; 11-limiting nut; 12-fastening pin; 13-transmission bolt; 14-reinforcement structure; 15-reinforcement rib; 16-grid frame inner rib; 17-outer flange; 18-inner flange; 19-support leg connecting platform; 20-support leg fixing platform; 21-support leg fixing hole; 22-lifting ear reinforcement part; 23-product edge; 24-bottoming plane structure; 25-lifting hole; 26-opening. DETAILED DESCRIPTION

[0042] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solution of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Example 1

[0044] like Figure 1 , Figure 2 As shown in a, a composite underwater oil collecting cover described in this embodiment includes:

[0045] Cover body 1; a through hole is provided on the top of the cover body 1, and the through hole is used to connect with the oil pipe; the cover body 1 is a resin-based fiber-reinforced composite material;

[0046] Filter screen 2; arranged at the through hole; filter screen 2 is a resin-based fiber-reinforced composite material;

[0047] The horizontal pressure port 3 is provided on the cover body 1;

[0048] A plurality of support legs 4 are arranged at the bottom of the cover body 1, and the support legs 4 are made of a resin-based fiber-reinforced composite material.

[0049] The composite underwater oil collecting hood of this embodiment has a through hole on the top of the hood body that connects the electric submersible pump-oil pipe to the surface oil collecting ship for operation. The composite underwater oil collecting hood of this embodiment, the hood body, filter screen, and support leg are all made of resin-based fiber-reinforced composite materials. The material density is less than 1 / 4 of that of metal. It is light in weight and corrosion-resistant, and can be reused many times. In addition, no additional anode protection is required, eliminating the need for anode protection equipment; and it can also be used as an equipment protection cover, the overall weight of the oil collecting hood is reduced, and the requirements for the lifting equipment of the oil collecting ship are also reduced, which can reduce the cost of processing and collecting oil from the perspective of the hull equipment. The composite material filter screen can filter out a large amount of floating objects to avoid clogging the pump body. In addition, because its material can meet the long-term corrosion resistance problem, the frequency of replacing the filter screen structure can be reduced.

[0050] Furthermore, if Figure 2 In b, a raised column section structure is provided at the top through hole of the cover body 1, and a connecting nut is pre-embedded on the top end surface of the column section structure 5, which can be quickly connected to the pump body flange.

[0051] Furthermore, the filter screen 2 uses a composite porous plate formed by a molding process as a monomer material, the pores of the composite porous plate are filled with foam, and both sides of the composite porous plate are covered with Teflon films to ensure that resin does not enter the pores, so that the foam filling can be quickly removed after demoulding to achieve through-hole processing. The filter screen 2 is specifically arranged on the cover platform below the through-hole.

[0052] The function of the water-permeable pressure relief port 3 is to exhaust air and reduce the water pressure when the cover body enters water.

[0053] Further, it also includes a filter cleaning mechanism, such as Figure 3 As shown in Figure c, the filter cleaning mechanism is arranged on the filter 2; the filter cleaning mechanism includes:

[0054] A cleaning shovel 6 is provided on one side of the filter screen 2 located inside the cover body 1;

[0055] The switch handle 7 is arranged on one side of the filter 2 outside the cover body 1;

[0056] The transmission assembly connects the cleaning shovel 6 to the switch handle 7.

[0057] The composite underwater oil collecting cover of this embodiment has a switch handle 7 on the outside of the filter, and a cleaning shovel 6 is connected to the switch handle 7 through a transmission assembly. Divers or ROV robots drive the internal cleaning shovel structure to scrape off floating objects and water plants on the anti-clogging net by turning the switch handle on the outside of the cover to ensure smooth suction channel of the pump port. In addition, state identification signals ON and OFF can also be set on the outside of the filter to indicate the position of the cleaning shovel.

[0058] Preferably, if Figure 4 As shown, the switch handle 7 is provided with a square through groove; the bottom of the cleaning shovel 6 is provided with a square groove;

[0059] The transmission components include:

[0060] A square fixing platform 8 is located in the square groove of the cleaning shovel 6, and the square fixing platform 8 is provided with an internal thread;

[0061] The rotating protection platform 9 is located above the cleaning shovel 6; the top of the rotating protection platform 9 is provided with a groove; the groove is suitable for embedding one end of the switch handle 7;

[0062] The square nut 10 is embedded in the square through groove of the switch handle 7; the square nut 10 is provided with an internal thread;

[0063] The limit nut 11 is located above the switch handle 7. The limit nut is provided with an internal thread. The limit nut is also provided with a fastening hole. A fastening pin 12 is provided in the fastening hole.

[0064] The transmission bolt 13 is sequentially inserted into the square fixing table 8, the cleaning shovel 6, the rotating protection table 9, the square nut 10, and the limit nut 11, so that the cleaning shovel 6 is connected to the switch handle 7 by transmission.

[0065] The composite underwater oil collecting hood of this embodiment links the transmission bolt with the cleaning shovel through the inner thread and outer shape structure of the square fixing platform; the upper switch handle and the lower cleaning shovel structure are linked through the rotating protection platform, square nut, switch handle, limit nut and fastening pin, so that the switch drives the convenient rotation of the cleaning shovel.

[0066] The switch handle 7 is embedded in the rotating protection platform 9, which can prevent the cover from being damaged when the cover is tightened, and can also raise the switch handle to form an operating space between the cover and the switch handle. The switch handle is formed by vacuum infusion process.

[0067] Preferably, the cleaning shovel 6 is formed by a pultrusion process.

[0068] Furthermore, the side of the cleaning shovel 6 is also provided with oblique ribs, which can form a pressure surface, and can ensure that local pressure is formed during rotation, so that the blockage on the square blockage net is cleared.

[0069] Preferably, if Figure 3 As shown in b, there are two groups of filter cleaning mechanisms, which are located at two locations on the diagonal lines of the filter. The cleaning shovels of the two groups of filter cleaning mechanisms can cover the entire area of ​​the filter when they rotate. The filter cleaning mechanisms are set diagonally, and the cleaning structures set diagonally can fully cover the entire area of ​​the anti-clogging net, and can operate independently in sequence without interfering with each other.

[0070] Preferably, if Figure 2 Middle a, Figure 3 As shown in a, the cover body 1 is in the shape of a quadrangular pyramid; a reinforcing structure 14 is provided at the side edge of the outer side of the cover body 1, and the reinforcing structure 14 is a trapezoidal structure that is narrow at the top and wide at the bottom; reinforcing ribs 15 are provided at the outer side of the reinforcing structure 14; a grid frame inner rib 16 is provided at the inner side of the cover body 1; the reinforcing structure 14, the reinforcing rib 15, and the grid frame inner rib 16 are all made of resin-based fiber reinforced composite materials. The reinforcing structure 14 and the reinforcing rib 15 can be integrated with the grid frame inner rib 16 to ensure the stability of the cover structure.

[0071] Furthermore, it also includes a hanging hole 25, which is arranged on the cover body 1.

[0072] Furthermore, the cover body is provided with a lifting ear reinforcement portion 22. The bottom of the cover body is provided with an inwardly buckled product edge 23.

[0073] Furthermore, the preparation method of the cover body is as follows: the composite material cloth layer required for the cover body is laid on the forming mold, the internal thickening forms the grid frame ribs 16 and the ear reinforcement part 22 connected vertically and horizontally, and the mold flange edge and the bonding angle mold are used to ensure that the layer forms the inward buckled product edge 23. The composite material porous plate unit is laid as a prefabricated part with the cloth layer, and the whole is poured through the vacuum introduction pouring process, and the cover body, the filter screen and the horizontal pressure port are formed in one piece, which saves the cost and time of step-by-step forming and reassembly, and the overall pouring structure is more stable and reduces the number of connectors.

[0074] Furthermore, the reinforcing ribs 15 are fixed to the surface of the cover body by bolts.

[0075] Furthermore, the reinforcing rib 15 is formed by a vacuum infusion process.

[0076] Furthermore, the width of the reinforcement structure 14 gradually increases from top to bottom.

[0077] Preferably, if Figure 1 , Figure 5 As shown, an outer flange 17 is provided at the bottom of the reinforcing rib 15, and an inner flange 18 is provided at a corresponding position of the bottom of the cover body 1, and the outer flange 17 is connected to the inner flange 18; the top of the supporting leg 4 is connected to the inner flange.

[0078] The composite underwater oil collecting hood of the present embodiment is provided with an external reinforcing rib 15 on the outside of the reinforcing structure, and an outer flange is formed at the bottom of the reinforcing rib 15 to form a fixed area together with the inner flange formed on the hood body, thereby increasing the fixing area of ​​the support leg, ensuring the firmness of the fixing structure, and releasing the single-point internal stress of the fixed support leg to the entire hood body surface.

[0079] Preferably, it also includes:

[0080] A support leg connecting platform 19; the support leg connecting platform 19 is connected to the inner flange 18 and the outer flange 17; a support leg fixing platform 20 is provided on the support leg connecting platform 19; a support leg fixing hole 21 is provided on the support leg fixing platform 20; the support leg 4 is connected to the support leg fixing hole 21 by bolts; the support leg connecting platform 19 is a resin-based fiber reinforced composite material.

[0081] Furthermore, the support leg connecting platform 19 is connected to the outer flange 17 at the bottom of the reinforcing rib and the inner flange 18 at the bottom of the cover body by bolts, and there is connection operation space both inside and outside.

[0082] Furthermore, the supporting leg connecting platform is formed by a vacuum infusion process.

[0083] Preferably, if Fig. 9 , Fig.10As shown, the bottom of the support leg connecting platform 19 is integrally formed with a support leg fixing platform 20, and three parallel fixed walls 22 are arranged inside the support leg fixing platform 20. A clamping reinforcement pattern is formed inside the fixing platform to form three layers of fixed walls, which strengthens the stability of the bolt holes and reduces the difficulty of forming the support leg fixing platform.

[0084] Preferably, three support leg fixing holes 21 are respectively provided on the two opposite sides of the support leg fixing platform 20; the positions of the support leg fixing holes 21 on the two sides correspond to each other. When the support leg 4 needs to be rotated, the other two fixing bolts are removed, and after rotating around one bolt to the corresponding angle, the other two fixing bolts are fixed, so that the angle of the support leg can be adjusted.

[0085] The composite underwater oil collecting cover of this embodiment has a variety of working modes, and can be selected for hoisting and floating oil collecting operations according to the state (such as Figure 6 as shown), or by opening the support legs (as Figure 7 As shown), the support leg can be used to reduce the lifting pressure. According to the needs of the seabed site, the two bolts connecting the support leg and the support leg fixing platform can be adjusted. The cover can be transformed into an emergency oil and gas facility protection cover by adjusting the support leg angle to protect the equipment. After the professional protection equipment is designed and manufactured, it can be replaced and retrieved. Figure 8 As shown, after the cover opens the support leg angle, the support legs are extended at four corners, increasing the contact area between the cover and the bottom of the seabed, which is equivalent to the function of the anti-sinking plate of the equipment and helps to stabilize the cover on the seabed.

[0086] Furthermore, the two side walls of the support leg 4 are opened at a certain distance at the bottom to ensure the rotation of the bottom around the support leg fixing platform 20. The bottom of the support leg connecting platform 19 is provided with an opening 26 in the direction of the support leg 4 opening to ensure the support leg opening space. The bottom of the support leg 4 is provided with a bottom contacting plane structure 24 to increase the contact area with the seabed.

[0087] like Fig.10 As shown, the support leg connecting platform 19 is a double-peaked wing-shaped structure, embedded in the seabed mud, effectively limiting the movement of the cover body, increasing the difficulty of the cover body being towed away by other towing objects, and achieving the purpose of temporarily protecting the internal equipment.

[0088] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A composite material underwater oil collecting cover, characterized in that: include: A cover body; a through hole is provided on the top of the cover body, and the through hole is used to connect with the oil pipe; the cover body is a resin-based fiber-reinforced composite material; Filter; The filter is arranged at the through hole; the filter is a resin-based fiber-reinforced composite material; Through the horizontal pressure port; provided on the cover body; A plurality of support legs are arranged at the bottom of the cover body, and the support legs are made of resin-based fiber-reinforced composite material.

2. The composite underwater oil collecting cover according to claim 1, characterized in that: It also includes a filter cleaning mechanism, which is arranged on the filter; the filter cleaning mechanism includes: A cleaning shovel is provided on one side of the filter screen located inside the cover; A switch handle is arranged on one side of the filter screen outside the cover; Transmission assembly: the transmission assembly transmits and connects the cleaning shovel with the switch handle.

3. The composite underwater oil collecting cover according to claim 1, characterized in that: The switch handle is provided with a square through slot; the bottom of the cleaning shovel is provided with a square groove; The transmission assembly comprises: A square fixing platform; located in the square groove of the cleaning shovel, the square fixing platform is provided with an internal thread; A rotating protection platform; located above the cleaning shovel; a groove is provided on the top of the rotating protection platform; the groove is suitable for embedding one end of the switch handle; A square nut; embedded in the square through slot of the switch handle; the square nut is provided with an internal thread; A limit nut; located above the switch handle; the limit nut is provided with an internal thread; the limit nut is also provided with a fastening hole; a fastening pin is provided in the fastening hole; Transmission bolt; the transmission bolt sequentially penetrates the square fixing platform, the cleaning shovel, the rotating protection platform, the square nut, and the limit nut to connect the cleaning shovel with the switch handle.

4. The composite underwater oil collecting cover according to claim 1, characterized in that: There are two groups of filter cleaning mechanisms, which are respectively located at two locations on the diagonal lines of the filter; when the cleaning shovels of the two groups of filter cleaning mechanisms rotate, the area of ​​the filter can be fully covered.

5. The composite underwater oil collecting cover according to claim 1, characterized in that: The cover body is in the shape of a quadrangular pyramid; a reinforcing structure is provided at the side edge of the outer side of the cover body, and the reinforcing structure is a trapezoidal structure that is narrow at the top and wide at the bottom; reinforcing ribs are provided on the outer side of the reinforcing structure; a grid frame inner rib is provided on the inner side of the cover body; the reinforcing structure, the reinforcing ribs, and the grid frame inner ribs are all made of resin-based fiber-reinforced composite materials.

6. The composite underwater oil collecting cover according to claim 5, characterized in that: An outer flange is provided at the bottom of the reinforcing rib, and an inner flange is provided at a corresponding position of the bottom of the cover body, wherein the outer flange is connected to the inner flange; and the top of the supporting leg is connected to the inner flange.

7. The composite underwater oil collecting cover according to claim 6, characterized in that: Also includes: A supporting leg connecting platform; the supporting leg connecting platform is connected to the inner flange and the outer flange; a supporting leg fixing platform is provided on the supporting leg connecting platform; a supporting leg fixing hole is provided on the supporting leg fixing platform; the supporting leg is connected to the supporting leg fixing hole by bolts; the supporting leg connecting platform is a resin-based fiber reinforced composite material.

8. The composite underwater oil collecting cover according to claim 7, characterized in that: The supporting leg fixing platform is integrally formed at the bottom of the supporting leg connecting platform, and three parallel fixed walls are arranged inside the supporting leg fixing platform.

9. The composite underwater oil collecting cover according to claim 7, characterized in that: Three supporting leg fixing holes are respectively arranged on two opposite sides of the supporting leg fixing platform; and the positions of the supporting leg fixing holes on the two side sides correspond to each other.

10. The composite underwater oil collecting cover according to claim 7, characterized in that: The bottom of the supporting leg connecting platform is provided with an opening in the direction in which the supporting legs are opened; and the bottom of the supporting legs is provided with a bottoming plane structure.

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