A marine platform lifting gravity energy storage and recycling device

Abstract

This invention discloses a gravity energy storage and recycling device for lifting and lowering offshore platforms. It includes a polygonal truss with multiple lifting piles fixedly connected to it. Each lifting pile has a pin hole and a lifting rack on its side, connected to a power system. An energy storage hydraulic cylinder is located on the side of each lifting pile away from the truss, connected to a pin hydraulic cylinder. Both the pin hydraulic cylinder and the energy storage hydraulic cylinder are connected to an energy storage control system. The advantage is that each set of lifting pile legs includes a gravity energy storage and recycling device. During the descent of the offshore platform, the gravitational potential energy is absorbed by the energy storage hydraulic cylinder within the energy storage device and converted into pressure energy. During the lifting of the offshore platform, the energy storage hydraulic cylinder, through its cooperation with the pin hydraulic cylinder, converts the pressure energy stored inside into clean energy usable by the offshore platform lifting device, reducing energy waste.

Description

Technical Field

[0001] This application belongs to the field of marine platform technology, specifically relating to a marine platform lifting gravity energy storage and recycling device. Background Technology

[0002] Traditional offshore platform lifting devices lack energy storage and recycling capabilities. During the lifting and lowering process, the gravitational potential energy of the offshore platform cannot be effectively stored, resulting in resource waste. Furthermore, the gravitational potential energy released by the offshore platform is difficult to convert into usable green energy. Summary of the Invention

[0003] To address the aforementioned problems, this application provides a gravity energy storage and recycling device for offshore platform lifting systems, wherein each leg lifting system is equipped with a gravity energy storage and recycling device. The technical solution is as follows:

[0004] A gravity-based energy storage and recycling device for lifting and lowering an offshore platform includes a polygonal truss with multiple lifting piles fixedly connected to it. Each lifting pile has a pin hole and a lifting rack on its side, which is connected to a power system. An energy storage hydraulic cylinder is located on the side of each lifting pile away from the truss and is connected to a pin hydraulic cylinder. Both the pin hydraulic cylinder and the energy storage hydraulic cylinder are connected to an energy storage control system. The energy storage hydraulic cylinder and the power system are connected to an external offshore platform.

[0005] Preferably, the power system includes a drive motor, a small drive gear, a large driven gear, and a lifting gear. The drive motor is fixed on a support plate and connected to the small drive gear. The small drive gear meshes with the large driven gear. The large driven gear and the lifting gear are both mounted on a transmission shaft. The lifting gear meshes with a lifting rack.

[0006] Preferably, the energy storage system includes a high-pressure gas cylinder and a piston accumulator. The pin-type hydraulic cylinder is connected to one port of a two-position three-way solenoid valve, and the other two ports of the two-position three-way solenoid valve are connected to an oil source and an oil tank, respectively. The oil source is connected to another two-position two-way solenoid valve, a proportional relief valve, the piston accumulator, and a pressure sensor through a two-position two-way solenoid valve. The two-position two-way solenoid valve is connected to the energy storage hydraulic cylinder. The piston accumulator is connected to the high-pressure gas cylinder through a shut-off valve, and the other end of the proportional relief valve is connected to the oil tank. The piston accumulator is equipped with a pressure sensor. The energy storage hydraulic cylinder is equipped with a displacement sensor, and the pressure sensor and the displacement sensor are respectively connected to a controller.

[0007] Preferably, the displacement sensor transmits the displacement signal of the energy storage hydraulic cylinder to the controller via the control line; the pressure sensor transmits its pressure signal to the controller; the control signal output by the controller is transmitted to the two-position three-way solenoid valve via control line a, to the two-position two-way solenoid valve via control line b, to another two-position two-way solenoid valve via control line c, and to the proportional relief valve via control line d.

[0008] Preferably, when the two-position three-way solenoid directional valve is in the left position, its P port is in the closed state, and its A port and T port are in the open state; when it is in the right position, its A port and P port are in the open state, and its T port is in the closed state; when the two-position two-way solenoid directional valve is in the left position, its A port and B port are in the open state; when it is in the right position, its A port and B port are in the closed state.

[0009] Preferably, after the offshore platform completes its operational tasks, the platform's leg lifting system lowers the platform to sea level. During this descent, the gravity energy storage and recycling device converts the platform's gravitational potential energy into hydraulic energy. The specific process is as follows: the first two-position two-way solenoid directional valve switches to the left position, and the first two-position three-way solenoid directional valve and the second two-position two-way solenoid directional valve switch to the right position. Hydraulic oil from the oil source flows through the first two-position three-way solenoid directional valve into the rodless chamber of the first pin hydraulic cylinder. The high pressure in the rodless chamber of the first pin hydraulic cylinder... Under the action of oil, the cylinder extends continuously. As the piston of the first pin hydraulic cylinder moves, the pin at the end of its piston rod continuously inserts into the pin hole of the lifting pile, activating the drive motor. The drive motor is connected via a key and drives the small drive gear. The small drive gear, through meshing with the large driven gear, drives the large driven gear to rotate together. The large driven gear and the lifting gear are mounted together on the transmission shaft. The lifting gear meshes with the lifting rack. As the lifting gear of the power unit descends along the lifting rack, the power unit drives the offshore platform to move along the lifting pile. As the offshore platform continues to descend, energy storage... The piston rod of the hydraulic cylinder continuously retracts. Hydraulic oil in the rodless chamber of the energy storage hydraulic cylinder, under the action of the piston, flows through the first two-position two-way solenoid directional valve into the first pressure sensor and the first piston accumulator. High-pressure gas flows through the first piston accumulator and then through a shut-off valve into the high-pressure gas cylinder. When the pressure signal of the first pressure sensor is higher than the preset pressure of the first proportional relief valve, hydraulic oil flows through port A of the first proportional relief valve into the proportional relief valve, and then flows back to the oil tank through port B. When the first, second, and third energy storage hydraulic cylinders... After the hydraulic cylinder completes energy storage, the first two-position three-way solenoid directional valve is switched to the left position, and the first two-position two-way solenoid directional valve is switched to the right position. The hydraulic oil in the rodless chamber of the first pin hydraulic cylinder flows into the first two-position three-way solenoid directional valve under the action of its spring. After passing through the first two-position three-way solenoid directional valve, the hydraulic oil flows back to the oil tank. As the piston rod of the first pin hydraulic cylinder retracts, the pin at its end disengages from the pin hole of the lifting pile. The lifting pile continues to rise under the action of the power unit. When the lifting pile is raised to the predetermined position, the offshore platform returns to normal navigation status, completing the energy storage function.

[0010] Preferably, when the offshore platform reaches the designated sea area and needs to carry out operational tasks, the platform's leg lifting system inserts the lifting piles into the seabed and raises the platform above sea level. During the platform's ascent, the energy storage and recycling device converts the internally stored hydraulic energy into the platform's gravitational potential energy. The specific process is as follows: After the legs contact the seabed, the first two-position three-way solenoid valve and the second two-position two-way solenoid valve switch to the right position, and the first two-position two-way solenoid valve switches to the left position. Hydraulic oil from the oil source flows into the rodless chamber of the first pin hydraulic cylinder through the first two-position three-way solenoid valve. The piston rod of the first pin hydraulic cylinder extends continuously under the action of high-pressure oil in its rodless chamber. As the piston of the first pin hydraulic cylinder moves, the pin at the end of its piston rod continuously inserts into the pin hole of the lifting pile. When all the pins of the first pin hydraulic cylinder are inserted into the pin holes of the lifting pile, the drive motor is started. The drive motor is connected to and drives a small drive gear via a key. The small drive gear, through meshing with a large driven gear, drives the large driven gear to rotate together. The large driven gear and the lifting gear are mounted on the transmission shaft together. The lifting gear meshes with the lifting rack. As the lifting gear rotates, the power unit continuously lifts along the lifting rack, and the power unit drives the offshore platform to move along the lifting pile. During the lifting process of the offshore platform, the energy storage hydraulic cylinder assists in lifting the offshore platform. The high-pressure gas in the high-pressure gas cylinder flows into the first piston accumulator through the shut-off valve. The hydraulic oil flows into the energy storage hydraulic cylinder through the first piston accumulator and then through the first two-position two-way solenoid directional valve. The piston rod of the energy storage hydraulic cylinder extends continuously under the action of the high-pressure oil in its rodless chamber. The thrust output by the energy storage hydraulic cylinder is transmitted to the offshore platform with the assistance of the pin hydraulic cylinder, which is used to assist in lifting the offshore platform and complete the energy release function of the energy storage hydraulic cylinder.

[0011] Beneficial effects

[0012] This patent proposes a gravity energy storage and recycling device for the lifting and lowering of an offshore platform. The invention comprises four sets of leg lifting systems, each equipped with a gravity energy storage and recycling device. During the descent of the offshore platform, the gravitational potential energy is absorbed by a storage hydraulic cylinder within the energy storage device and converted into pressure energy. During the lifting process, the storage hydraulic cylinder, in coordination with a latch hydraulic cylinder, converts its stored pressure energy into the gravitational potential energy of the offshore platform, reducing energy waste. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the energy storage control system of this application;

[0014] Figure 2 This is a schematic diagram of a polygonal truss structure;

[0015] Figure 3 This is a schematic diagram of the power unit structure;

[0016] Figure 4 This is a top view of the power unit structure;

[0017] Figure 5 This is a diagram showing the installation location of the polygonal truss on the offshore platform.

[0018] Figure 6 A schematic diagram of the main structure of the lifting pile.

[0019] In the picture:

[0020] 1-Oil source, 2-Oil tank, 3-First pin hydraulic cylinder, 4-Second pin hydraulic cylinder, 5-Third pin hydraulic cylinder, 6-Controller A, 7-Controller B, 8-Controller C, 9-First displacement sensor, 10-Second displacement sensor, 11-Third displacement sensor, 12-First energy storage hydraulic cylinder, 13-Second energy storage hydraulic cylinder, 14-Third energy storage hydraulic cylinder, 15-First two-position three-way solenoid directional valve, 16-Second two-position three-way solenoid directional valve, 17-The Three two-position three-way solenoid directional valves, 18-first two-position two-way solenoid directional valve, 19-third two-position two-way solenoid directional valve, 20-fifth two-position two-way solenoid directional valve, 21-second two-position two-way solenoid directional valve, 22-fourth two-position two-way solenoid directional valve, 23-sixth two-position two-way solenoid directional valve, 24-first proportional relief valve, 25-second proportional relief valve, 26-third proportional relief valve, 27-first pressure sensor, 28-second pressure sensor, 29-then... Three pressure sensors, 30-first piston accumulator, 31-second piston accumulator, 32-third piston accumulator, 33-first high-pressure gas cylinder, 34-second high-pressure gas cylinder, 35-third high-pressure gas cylinder, 36-fourth high-pressure gas cylinder, 37-fifth high-pressure gas cylinder, 38-sixth high-pressure gas cylinder, 39-seventh high-pressure gas cylinder, 40-eighth high-pressure gas cylinder, 41-ninth high-pressure gas cylinder, 42-tenth high-pressure gas cylinder, 43-eleventh high-pressure gas cylinder, 44- The twelfth high-pressure gas cylinder, 45-first shut-off valve, 46-second shut-off valve, 47-third shut-off valve, 48-fourth shut-off valve, 49-fifth shut-off valve, 50-sixth shut-off valve, 51-seventh shut-off valve, 52-eighth shut-off valve, 53-ninth shut-off valve, 54-tenth shut-off valve, 55-eleventh shut-off valve, 56-twelfth shut-off valve, 57-triangular truss, 58-lifting pile, 59-lifting rack, 60-power unit, 100-offshore platform. Detailed Implementation

[0021] The following detailed descriptions are exemplary and intended to provide further illustration of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application.

[0022] A gravity-based energy storage and recycling device for lifting and lowering an offshore platform includes a polygonal truss (a regular polygonal truss such as a triangular truss, hexagonal truss, or octagonal truss can be used; this application uses a triangular truss 57). Lifting piles 58 are provided at the intersection of two adjacent sides of the triangular truss 57. The triangular truss and the lifting piles are fixedly connected. Each lifting pile 58 has a pin hole. Lifting racks 59 are provided on both sides of the lifting pile. The lifting racks 59 are connected to a power system. An energy storage hydraulic cylinder is provided on the lifting pile 58. The energy storage hydraulic cylinder is connected to a pin hydraulic cylinder. Both the pin hydraulic cylinder and the energy storage hydraulic cylinder are connected to an energy storage control system. The polygonal truss is connected to an external offshore platform.

[0023] The power system includes a drive motor 601, a small drive gear 602, a large driven gear 603, and a lifting gear 604. The drive motor 601 is fixed on a support plate and is connected to the small drive gear 602. The small drive gear 602 meshes with the large driven gear 603. The large driven gear 603 and the lifting gear 604 are both mounted on a transmission shaft 605. The lifting gear 604 meshes with a lifting rack 59.

[0024] The first pin hydraulic cylinder 3, the second pin hydraulic cylinder 4, and the third pin hydraulic cylinder 5 are single-acting single-rod hydraulic cylinders, and their rod chambers contain a return spring.

[0025] When the first two-position three-way solenoid directional valve 15, the second two-position three-way solenoid directional valve 16, and the third two-position three-way solenoid directional valve 17 are in the left position, their P port is in the closed state, and their A port and T port are in the open state; when they are in the right position, their A port and P port are in the open state, and their T port is in the closed state.

[0026] Among them, when the first two-position two-way solenoid directional valve 18, the third two-position two-way solenoid directional valve 19, the fifth two-position two-way solenoid directional valve 20, the second two-position two-way solenoid directional valve 21, the fourth two-position two-way solenoid directional valve 22, and the sixth two-position two-way solenoid directional valve 23 are in the left position, their ports A and B are in a conducting state; when they are in the right position, their ports A and B are in a closed state.

[0027] Among them, the first energy storage hydraulic cylinder 12, the second energy storage hydraulic cylinder 13, and the third energy storage hydraulic cylinder 14 are single-acting single-rod hydraulic cylinders.

[0028] The first displacement sensor 9 measures the displacement of the piston of the first energy storage hydraulic cylinder 12; the second displacement sensor 10 measures the displacement of the piston of the second energy storage hydraulic cylinder 13; and the third displacement sensor 11 measures the displacement of the piston of the third energy storage hydraulic cylinder 14.

[0029] The three lifting piles 58 correspond to three independent energy storage control systems, specifically: the first displacement sensor 9 transmits the displacement signal of the first energy storage hydraulic cylinder 12 to controller A via a control line; the first pressure sensor 27 transmits its pressure signal to controller A; the control signal output by controller A is transmitted via control line a to the first two-position three-way solenoid valve 15, via control line b to the first two-position two-way solenoid valve 18, via control line c to the second two-position two-way solenoid valve 21, and via control line d to the first proportional relief valve 24; the second displacement sensor 10 transmits the displacement signal of the second energy storage hydraulic cylinder 13 to controller B via a control line; the second pressure sensor 28 transmits its pressure signal to controller B; the control signal output by controller B... The control signals are transmitted via control line e to the second two-position three-way solenoid valve 16, via control line f to the third two-position two-way solenoid valve 19, via control line g to the fourth two-position two-way solenoid valve 22, and via control line h to the second proportional relief valve 25; the third displacement sensor 11 transmits the displacement signal of the third energy storage hydraulic cylinder 14 to the controller C via the control line; the third pressure sensor 29 transmits its pressure signal to the controller C; the control signals output by the controller C are transmitted via control line i to the third two-position three-way solenoid valve 17, via control line j to the fifth two-position two-way solenoid valve 20, via control line k to the sixth two-position two-way solenoid valve 23, and via control line m to the third proportional relief valve 26.

[0030] System hydraulic circuit: Oil source 1 is connected to port 15P of the first two-position three-way solenoid valve 15, port 16P of the second two-position three-way solenoid valve 16, port 17P of the third two-position three-way solenoid valve 17, port 21A of the second two-position two-way solenoid valve 21, port 22A of the fourth two-position two-way solenoid valve 22, and port 23A of the sixth two-position two-way solenoid valve 23; Oil tank 2 is connected to port 15T of the first two-position three-way solenoid valve 15, port 16T of the second two-position three-way solenoid valve 16, port 17T of the third two-position three-way solenoid valve 17, port 24B of the first proportional relief valve 24, port 25B of the second proportional relief valve 25, and port 26A of the third proportional relief valve 26. Port B is connected; Port 15A of the first two-position three-way solenoid directional valve 15 is connected to Port 3A of the first pin-type hydraulic cylinder 3; Port 21B of the second two-position two-way solenoid directional valve 21 is connected to Port 18A of the first two-position two-way solenoid directional valve 18, Port 24A of the first proportional relief valve 24, Port 27A of the first pressure sensor 27, and Port 30A of the first piston accumulator 30; Port 18B of the first two-position two-way solenoid directional valve 18 is connected to Port 12A of the first energy storage hydraulic cylinder 12; Port 30B of the first piston accumulator 30 is connected to Port 45A of the first shut-off valve 45, Port 46A of the second shut-off valve 46, Port 47A of the third shut-off valve 47, and Port 48A of the fourth shut-off valve 48. The connection is as follows: Port 45B of the first shut-off valve 45 is connected to Port 33A of the first high-pressure gas cylinder 33; Port 46B of the second shut-off valve 46 is connected to Port 34A of the second high-pressure gas cylinder 34; Port 47B of the third shut-off valve 47 is connected to Port 35A of the third high-pressure gas cylinder 35; Port 48B of the fourth shut-off valve 48 is connected to Port 36A of the fourth high-pressure gas cylinder 36; Port 16A of the second two-position three-way solenoid directional valve 16 is connected to Port 4A of the second pin-type hydraulic cylinder 4; Port 22B of the fourth two-position two-way solenoid directional valve 22 is connected to Port 19A of the third two-position two-way solenoid directional valve 19, Port 25A of the second proportional relief valve 25, Port 28A of the second pressure sensor 28, and Port 31 of the second piston accumulator. The 31A port of the third two-position two-way solenoid directional valve 19 is connected to the 19B port of the second energy storage hydraulic cylinder 13; the 31B port of the second piston accumulator 31 is connected to the 49A port of the fifth shut-off valve 49, the 50A port of the sixth shut-off valve 50, the 51A port of the seventh shut-off valve 51, and the 52A port of the eighth shut-off valve 52; the 49B port of the fifth shut-off valve 49 is connected to the 37A port of the fifth high-pressure gas cylinder 37; the 50B port of the sixth shut-off valve 50 is connected to the 38A port of the sixth high-pressure gas cylinder 38; the 51B port of the seventh shut-off valve 51 is connected to the 39A port of the seventh high-pressure gas cylinder 39; and the 52B port of the eighth shut-off valve 52 is connected to the 40A port of the eighth high-pressure gas cylinder 40.The 17A port of the third two-position three-way solenoid directional valve 17 is connected to the 5A port of the third pin-type hydraulic cylinder 5; the 23B port of the sixth two-position two-way solenoid directional valve 23 is connected to the 20A port of the fifth two-position two-way solenoid directional valve 20, the 26A port of the third proportional relief valve 26, the 29A port of the third pressure sensor 29, and the 32A port of the third piston accumulator 32; the 20B port of the fifth two-position two-way solenoid directional valve 20 is connected to the 14A port of the third energy storage hydraulic cylinder 14; the 32B port of the third piston accumulator 32 is connected to the 5A port of the third two-position two-way solenoid directional valve 23. Port 53A of the nine stop valves 53, port 54A of the tenth stop valve 54, port 55A of the eleventh stop valve 55, and port 56A of the twelfth stop valve 56 are connected; port 53B of the ninth stop valve 53 is connected to port 41A of the ninth high-pressure gas cylinder 41; port 54B of the tenth stop valve 54 is connected to port 42A of the tenth high-pressure gas cylinder 42; port 55B of the eleventh stop valve 55 is connected to port 43A of the eleventh high-pressure gas cylinder 43; and port 56B of the twelfth stop valve 56 is connected to port 44A of the twelfth high-pressure gas cylinder 44.

[0031] System mechanical structure: The main body of the triangular truss 57 is a triangular column structure, with arc-shaped structures on its three long sides that cooperate with the lifting pile 58, and triangular hollow structures on its side; the main body of the lifting pile 58 is an elliptical structure, with multiple pin holes at the major axis of the elliptical structure and a rectangular boss at the minor axis of the elliptical structure for installing the lifting rack 59.

[0032] Gravity energy storage function: After the offshore platform completes its operation, the leg lifting system lowers the platform to sea level. During the descent, the gravity energy storage and recycling device converts the platform's gravitational potential energy into hydraulic energy. The specific process is as follows: The first two-position three-way solenoid valve 15, the second two-position three-way solenoid valve 16, and the third two-position three-way solenoid valve 17 are switched to the right position; the first two-position two-way solenoid valve 18, the third two-position two-way solenoid valve 19, and the fifth two-position two-way solenoid valve 20 are switched to the left position; the second two-position two-way solenoid valve 21, the fourth two-position two-way solenoid valve 22, and the sixth two-position two-way solenoid valve 23 are switched to the right position, and the hydraulic oil in oil source 1 is... The hydraulic oil flows into the first two-position three-way solenoid directional valve 15 through port 15P, then into the second two-position three-way solenoid directional valve 16 through port 16P, and finally into the third two-position three-way solenoid directional valve 17 through port 17P. After passing through the first two-position three-way solenoid directional valve 15, the hydraulic oil flows out through port 15A. The first hydraulic oil flowing out through port 15A flows into the rodless chamber of the first pin-type hydraulic cylinder 3 through port 3A. Under the action of the high-pressure oil in the rodless chamber, the piston rod of the first pin-type hydraulic cylinder 3 continuously extends. As the piston of the first pin-type hydraulic cylinder 3 moves, the pin at the end of its piston rod continuously inserts into the pin of the lifting pile 58. Hydraulic oil flows out from port 16A of the second two-position three-way solenoid directional valve 16. The hydraulic oil flowing out from port 16A flows into the rodless chamber of the second pin-type hydraulic cylinder 4 through port 4A. Under the action of the high-pressure oil in the rodless chamber, the piston rod of the second pin-type hydraulic cylinder 4 continuously extends, and with the movement of the piston of the second pin-type hydraulic cylinder 4, the pin at the end of its piston rod continuously inserts into the corresponding pin hole of the lifting pile 58. Hydraulic oil flows out from port 17A of the third two-position three-way solenoid directional valve 17. The hydraulic oil flowing out from port 17A flows into the rodless chamber of the third pin-type hydraulic cylinder 5 through port 5A. Under the action of the high-pressure oil in the rodless chamber, the piston rod of the third pin-type hydraulic cylinder 5 continuously extends, and with the movement of the piston of the second pin-type hydraulic cylinder 4, the pin at the end of its piston rod continuously inserts into the corresponding pin hole of the lifting pile 58. The movement of the pistons of the three pin hydraulic cylinders 5 causes the pins at the ends of their piston rods to continuously insert into the corresponding pin holes of the lifting piles 58. When all the pins of the third pin hydraulic cylinder are inserted into the corresponding pin holes of the lifting piles 58, the drive motor 601 is started. The drive motor 601 is connected to and drives the small drive gear 602 through a key. The small drive gear 602 drives the large driven gear 603 to rotate together through the meshing action between the small drive gear 602 and the large driven gear 603. The large driven gear 603 and the lifting gear 604 are mounted together on the transmission shaft 605. The lifting gear 604 meshes with the lifting rack 59. As the lifting gear 604 rotates, the power unit 60 continuously descends along the lifting rack 59. The power unit 60 drives the offshore platform to move together along the three lifting piles 58.As the offshore platform descends, the piston rods of the first energy storage hydraulic cylinder 12, the second energy storage hydraulic cylinder 13, and the third energy storage hydraulic cylinder 14 retract. Hydraulic oil in the rodless chamber of the first energy storage hydraulic cylinder 12 flows out from port 12A under the action of its piston. The hydraulic oil flowing out from port 12A flows into the first two-position two-way solenoid directional valve 18 through port 18B. After passing through the first two-position two-way solenoid directional valve 18, the hydraulic oil flows out from port 18A. The high-pressure gas flows into the first pressure sensor 27 through port 27A, and into the first piston accumulator 30 through port 30A. After passing through the piston accumulator 30, the high-pressure gas flows out through port 30B. The high-pressure gas flowing out of port 30B then flows into the first shut-off valve 45 through port 45A, into the second shut-off valve 46 through port 46A, and into the third shut-off valve 47 through port 47A. The high-pressure gas flows into the fourth shut-off valve 48 through port 48A. After passing through the first shut-off valve 45, it flows out through port 45B. After passing through the second shut-off valve 46, it flows out through port 46B. After passing through the third shut-off valve 47, it flows out through port 47B. After passing through the fourth shut-off valve 48, it flows out through port 48B. The high-pressure gas flowing out through ports 45B, 46B, 47B, and 48B flows into the first high-pressure gas cylinder 33 through port 33A. The second high-pressure gas cylinder 34 flows into the second high-pressure gas cylinder 34 through port 34A, flows into the third high-pressure gas cylinder 35 through port 35A, and flows into the fourth high-pressure gas cylinder 36 through port 36A. When the pressure signal of the first pressure sensor 27 is higher than the preset pressure of the first proportional relief valve 24, the hydraulic oil flows into the first proportional relief valve 24 through port 24A, and then flows back to the oil tank 2 through port 24B of the first proportional relief valve 24.The hydraulic oil in the rodless chamber of the second energy storage hydraulic cylinder 13 flows out from port 13A under the action of its piston. The hydraulic oil flowing out from port 13A flows into the third two-position two-way solenoid directional valve 19 through port 19B. After passing through the third two-position two-way solenoid directional valve 19, the hydraulic oil flows out from port 19A. The hydraulic oil flowing out from port 19A flows into the second pressure sensor 28 through port 28A. The high-pressure gas flows into the second piston accumulator 31 through port 31A of the accumulator 31. After passing through the second piston accumulator 31, the high-pressure gas flows out through port 31B. The high-pressure gas flowing out through port 31B flows into the fifth shut-off valve 49 through port 49A, into the sixth shut-off valve 50 through port 50A, into the seventh shut-off valve 51 through port 51A, and into the eighth shut-off valve 52 through port 52A. 2. High-pressure gas flows out through port 49B of the fifth shut-off valve 49, through port 50B of the sixth shut-off valve 50, through port 51B of the seventh shut-off valve 51, and through port 52B of the eighth shut-off valve 52. The hydraulic oil flowing out from ports 49B, 50B, 51B, and 52B flows into the fifth high-pressure gas cylinder 37 through port 37A, and then through port 38A of the sixth high-pressure gas cylinder 38. Hydraulic oil flows into the sixth high-pressure gas cylinder 38 through port A, into the seventh high-pressure gas cylinder 39 through port 39A, and into the eighth high-pressure gas cylinder 40 through port 40A. When the pressure signal of the second pressure sensor 28 is higher than the preset pressure of the second proportional relief valve 25, the hydraulic oil flows into the second proportional relief valve 25 through port 25A, and then flows back to the oil tank 2 through port 25B.The hydraulic oil in the rodless chamber of the third energy storage hydraulic cylinder 14 flows out from port 14A under the action of its piston. The hydraulic oil flowing out from port 14A flows into the fifth two-position two-way solenoid directional valve 20 through port 20B. After passing through the fifth two-position two-way solenoid directional valve 20, the hydraulic oil flows out from port 20A. The hydraulic oil flowing out from port 20A flows into the third pressure sensor 29 through port 29A, and then into the third piston accumulator. The high-pressure gas flows into the third piston accumulator 32 through port 32A of accumulator 32. After passing through the third piston accumulator 32, the high-pressure gas flows out through port 32B. The high-pressure gas flowing out through port 32B flows into the ninth shut-off valve 53 through port 53A, into the tenth shut-off valve 54 through port 54A, into the eleventh shut-off valve 55 through port 55A, and into the twelfth shut-off valve 56 through port 56A. 6. High-pressure gas flows out through port 53B of the ninth shut-off valve 53, through port 54B of the tenth shut-off valve 54, through port 55B of the eleventh shut-off valve 55, and through port 56B of the twelfth shut-off valve 56. The high-pressure gas flowing out through ports 53B, 54B, 55B, and 56B flows into high-pressure gas cylinder 41 through port 41A of the ninth high-pressure gas cylinder 41, and then through port 42A of the tenth high-pressure gas cylinder 42. Hydraulic oil flows into high-pressure cylinder 42 through port A, into eleventh high-pressure cylinder 43 through port 43A, and into twelfth high-pressure cylinder 44 through port 44A. When the pressure signal of the third pressure sensor 29 is higher than the preset pressure of the third proportional relief valve 26, hydraulic oil flows into the third proportional relief valve 26 through port 26A, and then flows back to the oil tank 2 through port 26B.After the first energy storage hydraulic cylinder 12, the second energy storage hydraulic cylinder 13, and the third energy storage hydraulic cylinder 14 complete energy storage, the first two-position two-way solenoid directional valve 18, the third two-position two-way solenoid directional valve 19, and the fifth two-position two-way solenoid directional valve 20 switch to the right position, and the first two-position three-way solenoid directional valve 15, the second two-position three-way solenoid directional valve 16, and the third two-position three-way solenoid directional valve 17 switch to the left position. The hydraulic oil in the rodless chambers of the first pin-type hydraulic cylinder 3, the second pin-type hydraulic cylinder 4, and the third pin-type hydraulic cylinder 5 flows out through their respective ports A. The hydraulic oil flowing out of port 3A flows into the first two-position three-way solenoid directional valve 15 through port 15A. After passing through the first two-position three-way solenoid directional valve 15, the hydraulic oil flows out through port 15A of the first two-position three-way solenoid directional valve 15. Hydraulic oil flowing from port 5T back to oil tank 2, and hydraulic oil flowing from port 4A flowing into the second two-position three-way solenoid directional valve 16 via port 16A, then flowing back to oil tank 2 via port 16T, and hydraulic oil flowing from port 5A flowing into the third two-position three-way solenoid directional valve 17 via port 17A, then flowing back to oil tank 2 via port 17T, retracts from the hydraulic cylinder piston rod. As the piston rod retracts, the pin at its end disengages from the pin hole of the lifting pile 58. The lifting pile 58 continues to rise under the action of the power unit 60. When the lifting pile 58 reaches the predetermined position, the offshore platform returns to normal navigation, completing its energy storage function.

[0033] Energy recycling function: When the offshore platform reaches the designated sea area and needs to carry out operational tasks, the platform's leg lifting system inserts the lifting pile 58 into the seabed and raises the platform above sea level. During the platform's ascent, the energy storage and recycling device converts the internally stored hydraulic energy into the platform's gravitational potential energy. The specific process is as follows: After the legs touch the bottom, the first two-position three-way solenoid valve 15, the second two-position three-way solenoid valve 16, and the third two-position three-way solenoid valve 17 switch to the right position; the first two-position two-way solenoid valve 18, the third two-position two-way solenoid valve 19, and the fifth two-position two-way solenoid valve 20 switch to the left position; the second two-position two-way solenoid valve 21 and the fourth two-position two-way solenoid valve... When the solenoid directional valve 22 and the sixth two-position two-way solenoid directional valve 23 are switched to the right position, the hydraulic oil in the oil source 1 flows into the first two-position three-way solenoid directional valve 15 through port 15P, into the second two-position three-way solenoid directional valve 16 through port 16P, and into the third two-position three-way solenoid directional valve 17 through port 17P. After passing through the first two-position three-way solenoid directional valve 15, the hydraulic oil flows out through port 15A. The hydraulic oil flowing out through port 15A flows into the rodless chamber of the first pin hydraulic cylinder 3 through port 3A. Under the action of the high-pressure oil in the rodless chamber, the piston rod of the first pin hydraulic cylinder 3 continuously extends. As the piston of the first pin-type hydraulic cylinder 3 moves, the pin at the end of its piston rod continuously inserts into the pin hole of the lifting pile 58. Hydraulic oil flows out from port 16A of the second two-position three-way solenoid valve 16. The hydraulic oil flowing out from port 16A flows into the rodless chamber of the second pin-type hydraulic cylinder 4 through port 4A. The piston rod of the second pin-type hydraulic cylinder 4 extends continuously under the action of the high-pressure oil in its rodless chamber. With the movement of the piston of the second pin-type hydraulic cylinder 4, the pin at the end of its piston rod continuously inserts into the pin hole of the lifting pile 58. Hydraulic oil flows out from port 17A of the third two-position three-way solenoid valve 17. The hydraulic oil flowing out from port 17A flows into the rodless chamber of the third pin-type hydraulic cylinder 5 through port 5A. The piston rod of the third pin-type hydraulic cylinder 5 extends continuously under the action of high-pressure oil in its rodless chamber. As the piston of the third pin-type hydraulic cylinder 5 moves, the pin at the end of its piston rod continuously inserts into the pin hole of the lifting pile 58. When all the pins of the third pin-type hydraulic cylinder are inserted into the pin holes of the lifting pile 58, the drive motor 601 is started. The drive motor 601 is connected to and drives the small drive gear 602 via a key. The small drive gear 602 drives the large driven gear 603 to rotate together through meshing with the large driven gear 603. The large driven gear 603 and the lifting gear 604 are mounted together on the transmission shaft 605. The lifting gear 604 meshes with the lifting rack 59. As the lifting gear 604 rotates, the power unit 60 continuously lifts along the lifting rack 59.The power unit 60 drives the offshore platform to move along the lifting pile 58. During the lifting process of the offshore platform, the first energy storage hydraulic cylinder 12, the second energy storage hydraulic cylinder 13, and the third energy storage hydraulic cylinder 14 assist in lifting the offshore platform. The high-pressure gas in the first high-pressure gas cylinder 33 flows out through its 33A port. The high-pressure gas flowing out of 33A port flows into the first shut-off valve 45 through its 45B port. After passing through the first shut-off valve 45, the high-pressure gas flows out through its 45A port. The high-pressure gas in the second high-pressure gas cylinder 34 flows out through its 34A port. The high-pressure gas flowing out of 34A port flows into the second shut-off valve 46 through its 46B port. After passing through the second shut-off valve 46, the high-pressure gas flows out through its 46A port. The third high-pressure... High-pressure gas in cylinder 35 flows out through port 35A. The high-pressure gas flowing out of port 35A flows into the third shut-off valve 47 through port 47B. After passing through the third shut-off valve 47, the high-pressure gas flows out through port 47A. High-pressure gas in high-pressure cylinder 36 flows out through port 36A. The high-pressure gas flowing out of port 36A flows into the fourth shut-off valve 48 through port 48B. After passing through the fourth shut-off valve 48, the high-pressure gas flows out through port 48A. The high-pressure gas flowing out from ports 45A, 46A, 47A, and 48A flows together into the first piston accumulator 30 through port 30B. Hydraulic oil flows out from the first piston accumulator 30 through port 30A. Hydraulic oil flows into the first pressure sensor 27 through port 27A, and then into the first two-position two-way solenoid directional valve 18 through port 18A. After passing through the first two-position two-way solenoid directional valve 18, the hydraulic oil flows out through port 18B. The hydraulic oil flowing out through port 18B flows into the first accumulator hydraulic cylinder 12 through port 12A. The piston rod of the first accumulator hydraulic cylinder 12 extends continuously under the action of the high-pressure oil in its rodless chamber. High-pressure gas from the fifth high-pressure gas cylinder 37 flows out through port 37A, and then into the fifth shut-off valve 49 through port 49B. After passing through the fifth shut-off valve 49, the high-pressure gas flows out through port 49A. The high-pressure gas in the sixth high-pressure gas cylinder 38 flows out through port 38A. The high-pressure gas flowing out of port 38A flows into the sixth shut-off valve 50 through port 50B. After passing through the sixth shut-off valve 50, the high-pressure gas flows out through port 50A. The high-pressure gas in the seventh high-pressure gas cylinder 39 flows out through port 39A. The high-pressure gas flowing out of port 39A flows into the seventh shut-off valve 51 through port 51B. After passing through the seventh shut-off valve 51, the high-pressure gas flows out through port 51A. The high-pressure gas in the eighth high-pressure gas cylinder 40 flows out through port 40A. The high-pressure gas flowing out of port 40A flows into the eighth shut-off valve 52 through port 52B. After passing through the eighth shut-off valve 52, the high-pressure gas flows out through port 52A.The high-pressure gas flowing out from ports 49A, 50A, 51A, and 52A flows into the second piston accumulator 31 through port 31B. Hydraulic oil flows out from port 31A of the second piston accumulator 31. The hydraulic oil flowing out from port 31A flows into the second pressure sensor 28 through port 28A, and then into the third two-position two-way solenoid valve 19 through port 19A. The hydraulic oil then flows out from port 19B of the third two-position two-way solenoid valve 19, and then into the second energy storage hydraulic cylinder 13 through port 13A. The piston rods of the two energy storage hydraulic cylinders 13 extend continuously under the action of high-pressure oil in their rodless chambers; the high-pressure gas in the ninth high-pressure gas cylinder 41 flows out through its port 41A, and the high-pressure gas flowing out of port 41A flows into the ninth shut-off valve 53 through port 53B, and then flows out through port 53A; the high-pressure gas in the tenth high-pressure gas cylinder 42 flows out through its port 42A, and the high-pressure gas flowing out of port 42A flows into the tenth shut-off valve 54 through port 54B, and then flows out through port 54A; the high-pressure gas in the eleventh high-pressure gas cylinder 43 flows out through its port 43A, and the high-pressure gas flowing out of port 43A... High-pressure gas flows into the eleventh shut-off valve 55 through port 55B. After passing through the eleventh shut-off valve 55, the high-pressure gas flows out through port 55A. The high-pressure gas in the twelfth high-pressure gas cylinder 44 flows out through port 44A. The high-pressure gas flowing out through port 44A flows into the twelfth shut-off valve 56 through port 56B. After passing through the twelfth shut-off valve 56, the high-pressure gas flows out through port 56A. The high-pressure gas flowing out through ports 53A, 54A, 55A, and 56A flows together into the third piston accumulator 32 through port 32B. The hydraulic oil flows out through the third piston accumulator 32 through port 32A. The hydraulic oil flows into the third pressure sensor 29 through port 29A, and then into the fifth two-position two-way solenoid directional valve 20 through port 20A. After passing through the fifth two-position two-way solenoid directional valve 20, the hydraulic oil flows out through port 20B. The hydraulic oil flowing out through port 20B flows into the third energy storage hydraulic cylinder 14 through port 14A. The piston rod of the third energy storage hydraulic cylinder 14 extends continuously under the action of high-pressure oil in its rodless chamber. The thrust output by the energy storage hydraulic cylinder is transmitted to the offshore platform with the assistance of the pin-type hydraulic cylinder for auxiliary lifting of the offshore platform, thus completing the energy release function of the energy storage hydraulic cylinder.

[0034] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A device for lifting, raising, and storing gravity-based energy for offshore platforms, characterized in that, The system includes a polygonal truss with multiple lifting piles fixedly connected to it. Each lifting pile has a pin hole and a lifting rack on its side, which is connected to a power system. An energy storage hydraulic cylinder is located on the side of each lifting pile away from the truss, and this energy storage hydraulic cylinder is connected to a pin-type hydraulic cylinder. Both the pin-type hydraulic cylinder and the energy storage hydraulic cylinder are connected to an energy storage control system. The energy storage hydraulic cylinder and the power system are connected to an external offshore platform. It also includes a high-pressure gas cylinder and a piston accumulator. The pin-type hydraulic cylinder is connected to one port of a two-position three-way solenoid directional valve, and the other two ports of the two-position three-way solenoid directional valve are connected to an oil source and an oil tank, respectively. The oil source is connected to another two-position two-way solenoid directional valve, a proportional relief valve, a piston accumulator, and a pressure sensor through a two-position two-way solenoid directional valve. The two-position two-way solenoid directional valve is connected to the energy storage hydraulic cylinder. The piston accumulator is connected to the high-pressure gas cylinder through a shut-off valve, and the other end of the proportional relief valve is connected to the oil tank. The piston accumulator is equipped with a pressure sensor. The energy storage hydraulic cylinder is equipped with a displacement sensor, and the pressure sensor and the displacement sensor are respectively connected to the controller. The displacement sensor transmits the displacement signal of the energy storage hydraulic cylinder to the controller via the control line; the pressure sensor transmits its pressure signal to the controller; the control signals output by the controller are transmitted to the two-position three-way solenoid directional valve via control line a, to the two-position two-way solenoid directional valve via control line b, to another two-position two-way solenoid directional valve via control line c, and to the proportional relief valve via control line d. When a two-position three-way solenoid directional valve is in the left position, its P port is closed, and its A and T ports are open; when it is in the right position, its A and P ports are open, and its T port is closed. When a two-position two-way solenoid directional valve is in the left position, its A and B ports are open; when it is in the right position, its A and B ports are closed.

2. The offshore platform lifting gravity energy storage and recycling device according to claim 1, characterized in that, The power system includes a drive motor, a small drive gear, a large driven gear, and a lifting gear. The drive motor is fixed on a support plate and is connected to the small drive gear. The small drive gear meshes with the large driven gear. The large driven gear and the lifting gear are both mounted on a transmission shaft. The lifting gear meshes with a lifting rack.

3. The offshore platform lifting gravity energy storage and recycling device according to claim 1, characterized in that, After the offshore platform completes its operational tasks, the platform's leg lifting system lowers it to sea level. During this descent, the gravity energy storage and recycling device converts the platform's gravitational potential energy into hydraulic energy. The specific process is as follows: the first two-position two-way solenoid valve switches to the left position, and the first two-position three-way solenoid valve and the second two-position two-way solenoid valve switch to the right position. Hydraulic oil from the oil source flows through the first two-position three-way solenoid valve into the rodless chamber of the first pin-type hydraulic cylinder. The piston rod of the first pin-type hydraulic cylinder operates under the pressure of the high-pressure oil in its rodless chamber. As the piston of the first hydraulic cylinder moves, the pin at the end of its piston rod continuously inserts into the pin hole of the lifting pile, activating the drive motor. The drive motor, connected via a key, drives a small drive gear. This small drive gear, through meshing with a large driven gear, causes the large driven gear to rotate. The large driven gear and the lifting gear are mounted on the drive shaft. The lifting gear meshes with the lifting rack. As the lifting gear of the power unit descends along the lifting rack, the power unit drives the offshore platform to move along the lifting pile. As the offshore platform continues to descend, the energy storage hydraulic... As the piston rod of the cylinder retracts continuously, the hydraulic oil in the rodless chamber of the energy storage hydraulic cylinder, under the action of its piston, flows through the first two-position two-way solenoid directional valve into the first pressure sensor and the first piston accumulator, respectively. High-pressure gas flows through the first piston accumulator and then through a shut-off valve into the high-pressure gas cylinder. When the pressure signal of the first pressure sensor exceeds the preset pressure of the first proportional relief valve, the hydraulic oil flows through port A of the first proportional relief valve into the proportional relief valve, and then flows back to the oil tank through port B. The same process occurs when the first, second, and third energy storage hydraulic cylinders... After the hydraulic cylinder completes energy storage, the first two-position three-way solenoid directional valve is switched to the left position, and the first two-position two-way solenoid directional valve is switched to the right position. The hydraulic oil in the rodless chamber of the first pin hydraulic cylinder flows into the first two-position three-way solenoid directional valve under the action of its spring. After passing through the first two-position three-way solenoid directional valve, the hydraulic oil flows back to the oil tank. As the piston rod of the first pin hydraulic cylinder retracts, the pin at its end disengages from the pin hole of the lifting pile. The lifting pile continues to rise under the action of the power unit. When the lifting pile is raised to the predetermined position, the offshore platform returns to normal navigation status, completing the energy storage function.

4. The offshore platform lifting gravity energy storage and recycling device according to claim 1, characterized in that, When the offshore platform reaches the designated sea area and needs to carry out operational tasks, the platform's leg lifting system inserts the lifting piles into the seabed and raises the platform above sea level. During the platform's ascent, the energy storage and recycling device converts the internally stored hydraulic energy into the platform's gravitational potential energy. The specific process is as follows: After the legs contact the seabed, the first two-position three-way solenoid valve and the second two-position two-way solenoid valve switch to the right position, and the first two-position two-way solenoid valve switches to the left position. Hydraulic oil from the oil source flows into the rodless chamber of the first pin hydraulic cylinder through the first two-position three-way solenoid valve. Under the action of the high-pressure oil in the rodless chamber, the piston rod of the first pin hydraulic cylinder extends continuously. As the piston of the first pin hydraulic cylinder moves, the pin at the end of its piston rod continuously inserts into the pin hole of the lifting pile. When the pin of the first pin hydraulic cylinder is fully inserted into the pin hole of the lifting pile, the drive motor is started, driving... The motor is connected to and drives a small drive gear via a key. The small drive gear, through meshing with a large driven gear, drives the large driven gear to rotate together. The large driven gear and the lifting gear are mounted on the transmission shaft together. The lifting gear meshes with the lifting rack. As the lifting gear rotates, the power unit continuously lifts along the lifting rack, and the power unit drives the offshore platform to move along the lifting pile. During the lifting process of the offshore platform, the energy storage hydraulic cylinder assists in lifting the offshore platform. The high-pressure gas in the high-pressure gas cylinder flows into the first piston accumulator through the shut-off valve. The hydraulic oil flows into the energy storage hydraulic cylinder through the first piston accumulator and then through the first two-position two-way solenoid directional valve. The piston rod of the energy storage hydraulic cylinder extends continuously under the action of the high-pressure oil in its rodless chamber. The thrust output by the energy storage hydraulic cylinder is transmitted to the offshore platform with the assistance of the pin hydraulic cylinder, which is used to assist in lifting the offshore platform and complete the energy release function of the energy storage hydraulic cylinder.

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