An emergency protection system for maritime lifting

Abstract

The utility model discloses an emergency protection system of maritime hoisting and lifting belongs to the ocean engineering technical field. In the emergency protection system of maritime hoisting and lifting, the oil outlet of the energy accumulator is communicated with the first end of the second pipeline, the stop valve is located on the second pipeline, the second end of the second pipeline is communicated with the first oil outlet pipeline, the lifting brake assembly is respectively communicated with the oil outlet of the first oil outlet pipeline and the oil inlet of the first oil return pipeline, the pressure enable valve is located between the second end of the second pipeline and the oil outlet of the first oil outlet pipeline, the first oil return pipeline further includes a reversing valve, and the emergency switch is connected with the reversing valve and the pressure enable valve. In the emergency state, the stop valve can transport the oil in the energy accumulator to the lifting brake assembly for multiple times, and the lifting brake assembly can be lifted and held for multiple times, thereby improving the safety of maritime hoisting and lifting in the emergency situation such as power failure.

Description

Technical Field

[0001] This utility model relates to the field of marine engineering technology, and in particular to an emergency protection system for marine lifting and hoisting. Background Technology

[0002] Marine lifting and hoisting is a core operation in offshore oil and gas platforms, wind power installations, and port engineering. Cranes or winches are typically mounted on ships or offshore platforms to lift, install, or dismantle large structures. Due to the complex offshore environment and large waves, a sudden power outage during marine lifting operations, coupled with external loads (such as the hook being dragged by waves), can cause the brakes to lock instantly. This can lead to a sudden increase in cable tension, causing the wire rope to snap and damaging the lifting equipment. The uncontrolled fall of the load can further damage the ship or offshore platform, or even strike nearby vessels or personnel. Therefore, ensuring the safety of marine lifting and hoisting operations is paramount in emergency situations such as sudden power outages. Utility Model Content

[0003] This utility model embodiment provides an emergency protection system for marine lifting and hoisting operations, the technical solution of which is as follows:

[0004] According to a first aspect of the present invention, an emergency protection system for marine lifting and hoisting is provided, comprising: an oil tank assembly, an energy storage assembly, a hoisting brake assembly, a first oil outlet pipeline, a second pipeline, a first oil return pipeline, and an emergency switch;

[0005] The oil tank assembly includes an oil tank and a motor pump. The oil inlet of the motor pump is connected to the oil tank, the oil outlet of the motor pump is connected to the oil inlet of the first oil outlet pipeline, and the oil tank is connected to the oil outlet of the first oil return pipeline.

[0006] The energy storage assembly includes an accumulator and a shut-off valve. The second pipeline includes a first end and a second end. The oil outlet of the accumulator is connected to the first end of the second pipeline. The shut-off valve is located on the second pipeline. The second end of the second pipeline is connected to the first oil outlet pipeline.

[0007] The hoisting brake assembly is connected to the oil outlet of the first oil outlet pipeline, and the hoisting brake assembly is also connected to the oil inlet of the first oil return pipeline.

[0008] The first oil outlet pipeline also includes a pressure enabling valve and a first check valve. The first check valve is located between the second end of the second pipeline and the oil inlet of the first oil outlet pipeline. The oil inlet of the first check valve is connected to the oil outlet of the motor pump. The oil outlet of the first check valve is connected to the pressure enabling valve. The pressure enabling valve is located between the second end of the second pipeline and the oil outlet of the first oil outlet pipeline.

[0009] The first return oil line also includes a reversing valve. The emergency switch is connected to the reversing valve and the pressure enabling valve. The emergency switch is used to open the pressure enabling valve and close the reversing valve, or to close the pressure enabling valve and open the reversing valve.

[0010] Optionally, the second pipeline further includes a one-way speed control valve, which includes a one-way valve and a speed control valve. The oil inlet of the one-way valve is connected to the shut-off valve, the oil outlet of the one-way valve is connected to the accumulator, the oil inlet of the speed control valve is connected to the accumulator, and the oil outlet of the speed control valve is connected to the shut-off valve.

[0011] Optionally, the emergency protection system for marine lifting and hoisting also includes a third pipeline and a manual pump located on the third pipeline. The oil inlet of the third pipeline is connected to the oil tank, and the oil outlet of the third pipeline is connected to the hoisting brake assembly.

[0012] Optionally, the hoisting brake assembly includes at least one brake part and an oil port connector. Each brake part includes a brake fluid tank. Each brake fluid tank is connected to the oil port connector via a pipeline. The oil outlet of the first oil outlet pipeline, the oil inlet of the first oil return pipeline, and the oil outlet of the third pipeline are all connected to the oil port connector.

[0013] Optionally, the emergency protection system for marine lifting and hoisting also includes a fourth pipeline and an overflow valve located on the fourth pipeline. The oil inlet of the fourth pipeline is located between the one-way speed control valve and the accumulator, and the oil outlet of the fourth pipeline is located inside the oil tank.

[0014] Optionally, the fuel tank assembly further includes an airbag, the fuel tank is a closed fuel tank, the shell of the closed fuel tank has an air cavity through hole, and the airbag communicates with the air cavity through hole.

[0015] Optionally, the oil tank assembly further includes a first filter and a second filter, wherein the first filter is connected to the oil inlet of the motor pump and the second filter is connected to the oil outlet of the motor pump.

[0016] Optionally, the first return oil line further includes a second check valve, the inlet of which is connected to the reversing valve, and the outlet of which is connected to the outlet of the first return oil line.

[0017] Optionally, the second pipeline further includes a pressure sensor capable of detecting the pipeline pressure between the shut-off valve and the pressure-enabled valve.

[0018] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following:

[0019] In the emergency protection system for marine lifting and hoisting provided in this embodiment of the utility model, the oil outlet of the accumulator is connected to the first end of the second pipeline, a shut-off valve is located on the second pipeline, the second end of the second pipeline is connected to the first oil outlet pipeline, the hoisting brake assembly is connected to the oil outlet of the first oil outlet pipeline and the oil inlet of the first return oil pipeline, respectively, a pressure enabling valve is located between the second end of the second pipeline and the oil outlet of the first oil outlet pipeline, the first return oil pipeline also includes a reversing valve, and an emergency switch is connected to the reversing valve and the pressure enabling valve. In the event of a sudden power outage or other emergency, the motor pump cannot pump oil from the oil tank to the hoisting brake assembly. At this time, pressing the emergency switch opens the pressure enabling valve and closes the reversing valve. The accumulator and shut-off valve cooperate to transport the oil in the accumulator from the second pipeline to the first oil outlet pipeline and then into the hoisting brake assembly, causing the brake to lift. Pressing the emergency switch again closes the pressure enabling valve and opens the reversing valve, allowing the oil in the hoisting brake assembly to return to the oil tank from the first oil outlet pipeline, causing the brake to engage. The shut-off valve can deliver small amounts of oil from the accumulator to the lifting brake assembly multiple times, allowing for multiple braking, lifting, and clamping operations in emergency situations. By releasing the brakes in stages, it gradually absorbs impact energy, reduces the risk of mechanical damage, and improves the safety of marine lifting operations in emergency situations such as sudden power outages. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram of an emergency protection system for marine lifting and hoisting, as shown in an embodiment of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1- Fuel tank assembly, fuel tank 11, air chamber through hole 111, motor pump 12, motor pump inlet 121, motor pump outlet 122, air bag 13, first filter 14, second filter 15;

[0024] 2- Energy storage component, accumulator 21, accumulator oil outlet 211, shut-off valve 22;

[0025] 3- Lifting brake assembly, brake unit 31, brake oil tank 311, oil port connector 32;

[0026] 4- First oil outlet line, first oil outlet line inlet 41, first oil return line outlet 42, pressure enable valve 43, first check valve 44, first check valve inlet 441, first check valve outlet 442;

[0027] 5- Second pipeline, first end 51, second end 52, one-way speed control valve 53, one-way valve 531, speed control valve 532, pressure sensor 54;

[0028] 6- First return oil line, first return oil line inlet 61, first return oil line outlet 62, reversing valve 63, second check valve 64, first branch line 65, spare socket 651;

[0029] 7- Fourth pipeline, overflow valve 71, fourth pipeline inlet 72, fourth pipeline outlet 73.

[0030] 8-Third pipeline, manual pump 81, third pipeline inlet 82, third pipeline outlet 83, pressure sensor 84;

[0031] The accompanying drawings have illustrated specific embodiments of the present invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0033] Figure 1 This is a structural schematic diagram of an emergency protection system for marine lifting and hoisting, as shown in an embodiment of this utility model. Figure 1 As shown, the emergency protection system for marine lifting and hoisting includes: fuel tank assembly 1, energy storage assembly 2, lifting brake assembly 3, first oil outlet line 4, second line 5, first oil return line 6, and emergency switch. Figure 1 (Not shown in the image).

[0034] The oil tank assembly 1 includes an oil tank 11 and a motor pump 12. The oil inlet 121 of the motor pump 12 is connected to the oil tank 11, the oil outlet 122 of the motor pump 12 is connected to the oil inlet 41 of the first oil outlet pipeline 4, and the oil tank 11 is connected to the oil outlet 62 of the first return oil pipeline 6.

[0035] The energy storage assembly 2 includes an accumulator 21 and a shut-off valve 22. The second pipeline 5 includes a first end 51 and a second end 52. The oil outlet 211 of the accumulator is connected to the first end 51 of the second pipeline. The shut-off valve 22 is located on the second pipeline 5. The second end 52 of the second pipeline is connected to the first oil outlet pipeline 4.

[0036] The lifting brake assembly 3 is connected to the oil outlet 42 of the first oil outlet pipeline, and the lifting brake assembly 3 is also connected to the oil inlet 61 of the first return oil pipeline. The lifting brake assembly is used to limit the movement of the lifting equipment during marine lifting operations, such as the lifting or lowering of the lifting equipment and the speed at which the lifting or lowering of the lifting equipment is controlled.

[0037] The first oil outlet line 4 also includes a pressure enabling valve 43 and a first check valve 44. The first check valve 44 is located between the second end 52 of the second line and the oil inlet 41 of the first oil outlet line. The oil inlet 441 of the first check valve is connected to the oil outlet 122 of the motor pump. The oil outlet 442 of the first check valve is connected to the pressure enabling valve 43. The pressure enabling valve 43 is located between the second end 52 of the second line and the oil outlet 42 of the first oil outlet line.

[0038] The first return oil line 6 also includes a reversing valve 63. An emergency switch is connected to the reversing valve 63 and the pressure enabling valve 43. The emergency switch is used to open the pressure enabling valve 43 and close the reversing valve 63, or to close the pressure enabling valve 43 and open the reversing valve 63.

[0039] In summary, in the emergency protection system for marine lifting and hoisting provided by this utility model embodiment, the oil outlet of the accumulator is connected to the first end of the second pipeline, the shut-off valve is located on the second pipeline, the second end of the second pipeline is connected to the first oil outlet pipeline, the hoisting brake assembly is connected to the oil outlet of the first oil outlet pipeline and the oil inlet of the first return oil pipeline respectively, the pressure enabling valve is located between the second end of the second pipeline and the oil outlet of the first oil outlet pipeline, the first return oil pipeline also includes a reversing valve, and the emergency switch is connected to the reversing valve and the pressure enabling valve. In the event of a sudden power outage or other emergency, if the motor pump cannot pump oil from the tank to the lifting brake assembly, pressing the emergency switch opens the pressure enabling valve and closes the directional valve. The accumulator and shut-off valve work together to transfer oil from the accumulator through the second pipeline to the first outlet pipeline, where it is then lifted into the lifting brake assembly, causing the brake to lift. Pressing the emergency switch again closes the pressure enabling valve and opens the directional valve, allowing oil from the lifting brake assembly to return to the tank through the first outlet pipeline, causing the brake to engage. The shut-off valve allows for multiple small-scale oil transfers from the accumulator to the lifting brake assembly, enabling multiple brake lifting and engaging operations in an emergency. This phased release of brakes gradually absorbs impact energy, reduces the risk of mechanical damage, and improves the safety of marine lifting operations in emergency situations such as power outages.

[0040] like Figure 1As shown, the second pipeline 5 also includes a one-way speed control valve 53, which includes a one-way valve 531 and a speed control valve 532. The inlet of the one-way valve 531 is connected to the shut-off valve 22, and the outlet of the one-way valve 531 is connected to the accumulator 21. The inlet of the speed control valve 532 is connected to the accumulator 21, and the outlet of the speed control valve 532 is connected to the shut-off valve 22. Under normal operating conditions, the outlet 122 of the motor pump supplies oil to the first oil outlet pipeline 4. After passing through the outlet 442 of the first one-way valve, a portion of the oil is transported to the second pipeline 5 at the second end 52 of the second pipeline, where it connects with the first oil outlet pipeline 4. The oil then flows through the shut-off valve 22 and the one-way valve 531 to the accumulator 21 for storage. The one-way valve 531 is used to achieve one-way free flow of the oil. In an emergency, the accumulator 21 supplies oil to the hoisting brake assembly 3. At this time, the oil inlet of the speed regulating valve 532 is connected to the accumulator 21, which can limit the flow rate of the oil and further ensure that the oil can enter the hoisting brake assembly 3 in small amounts and multiple times.

[0041] like Figure 1 As shown, the emergency protection system for marine lifting and hoisting also includes a third pipeline 8 and a manual pump 81 located on the third pipeline 8. The oil inlet 82 of the third pipeline is connected to the oil tank 11, and the oil outlet 83 of the third pipeline is connected to the lifting brake assembly 3. In the event of a sudden power outage during marine lifting and hoisting, and the accumulator 21 is also empty and unable to supply oil to the lifting brake assembly 3, the manual pump 81 can be manually operated to pump the oil from the oil tank 11 to the lifting brake assembly 3 through the third pipeline 8. In addition, the reversing valve 63 can also be manually opened and closed. When the reversing valve 63 is manually closed, the manual pump can supply oil to the lifting brake assembly 3, and the brake is lifted; when the reversing valve 63 is manually opened, the oil in the lifting brake assembly 3 returns to the oil tank 11 from the first oil outlet pipeline 6, and the brake is engaged. In other words, even in the event of a sudden power outage during marine lifting and hoisting operations, and with no oil stored in the accumulator to supply oil to the braking components, the emergency protection system for marine lifting and hoisting provided in this embodiment of the utility model can still perform multiple braking, lifting, and clamping operations through a third pipeline and a manual pump, reducing the risk of mechanical damage and improving the safety of marine lifting and hoisting operations in emergency situations such as sudden power outages.

[0042] like Figure 1 As shown, the hoisting brake assembly 3 includes at least one brake part 31 and an oil port connector 32. Each brake part 31 includes a brake oil tank 311. Each brake oil tank 311 is connected to the oil port connector 32 through a pipeline. The oil outlet 42 of the first oil outlet pipeline, the oil inlet 61 of the first oil return pipeline, and the oil outlet 83 of the third pipeline are all connected to the oil port connector 32. Figure 1 The diagram shows a hoisting brake assembly comprising four brake parts 31. The number of brake parts can also be two, three, etc. The specific number is not limited in this embodiment of the present invention.

[0043] like Figure 1 As shown, the emergency protection system for marine lifting and hoisting also includes a fourth pipeline 7 and an overflow valve 71 located on the fourth pipeline 7. The oil inlet 72 of the fourth pipeline is located between the one-way speed control valve 53 and the accumulator 21, and the oil outlet 73 of the fourth pipeline is located inside the oil tank 11. In this embodiment of the present invention, the accumulator can be a nitrogen accumulator. Under high temperature conditions, the nitrogen in the accumulator 21 may expand, increasing the nitrogen volume and increasing the pressure of the oil in the accumulator 21, causing the oil to overflow from the accumulator 21. The overflowing oil can flow from the oil inlet 72 of the fourth pipeline through the overflow valve 71, and then enter the oil tank 11 from the oil outlet 73 of the fourth pipeline.

[0044] Optionally, the fuel tank assembly 1 also includes an air bladder 13. The fuel tank 11 is a closed fuel tank, and the shell of the closed fuel tank has an air cavity through hole 111. The air bladder 13 communicates with the air cavity through hole 111. Emergency protection systems for marine lifting and hoisting are used in the ocean. To prevent water from entering the fuel tank, it is usually designed as a closed fuel tank. However, the volume of oil inside the closed fuel tank will expand or contract with temperature changes. When the oil contracts, a negative pressure may form inside the fuel tank, and when the oil expands, a positive pressure may form inside the fuel tank. Negative pressure may cause problems such as fuel tank deformation and difficulty in oil pump suction, while positive pressure may cause problems such as fuel tank seal failure, oil leakage, or structural damage. In order to solve the above problems, in this embodiment of the present invention, an air cavity through hole 111 is opened on the shell of the closed fuel tank to connect the air bladder 13 located outside the fuel tank. When the oil expands, the air bladder 13 is compressed, the internal gas volume decreases, and the released space is used to buffer the pressure rise. When the oil contracts, the airbag 13 expands and fills the cavity inside the oil tank 11 to prevent negative pressure from forming. The airbag 13 dynamically balances the pressure inside and outside the oil tank through elastic deformation, ensuring that the sealed oil tank can operate safely under environments such as temperature fluctuations, thereby further improving the safety of the emergency protection system for marine lifting and hoisting.

[0045] Optionally, the oil tank assembly 1 further includes a first filter 14 and a second filter 15. The first filter 14 is connected to the oil inlet 121 of the motor pump, and the second filter 15 is connected to the oil outlet 122 of the motor pump. The first filter 14 is located in the oil tank 11 and is connected to the oil inlet 121 of the motor pump. It can filter the oil when the motor pump 12 is pumping oil. Since some of the oil in the oil tank 11 is returned from the lifting brake assembly 3, in order to further ensure the quality of the oil delivered to the lifting brake assembly 3, a second filter 15 is also provided on the first oil outlet pipeline 4. The second filter 15 is located between the first check valve 44 and the motor pump 12, and filters the oil pumped out of the motor pump outlet before delivering it to the first check valve 44.

[0046] Optionally, the first return oil line 6 further includes a second check valve 64. The inlet of the second check valve 64 is connected to the reversing valve 63, and the outlet of the second check valve 64 is connected to the outlet 62 of the first return oil line. The second check valve 64 is located between the reversing valve 63 and the oil tank 11, allowing oil to flow from the reversing valve 63 into the oil tank 11, preventing the oil in the oil tank from expanding and flowing into the first return oil line 6 from the outlet 62 of the first return oil line.

[0047] Optionally, the second pipeline 5 also includes a pressure sensor 54, which can detect the pipeline pressure between the shut-off valve 22 and the pressure enabling valve 43. That is, the pressure sensor 54 can detect the pipeline pressure between the motor pump 12 and the pressure enabling valve 43, as well as between the shut-off valve 22 and the pressure enabling valve 43. Furthermore, in this embodiment of the invention, a pressure detection range value can be set for the pressure sensor 54. When the pipeline pressure between the motor pump 12 and the pressure enabling valve 43 is too low, the pressure sensor 54 controls the motor pump 12 to increase its power, thereby increasing the amount of oil supplied to the first oil outlet pipeline 4. When the pipeline pressure between the motor pump 12 and the pressure enabling valve 43 is too high, the pressure sensor 54 controls the motor pump 12 to reduce or shut off its power, thereby reducing or stopping the supply of oil to the first oil outlet pipeline 4.

[0048] Optionally, the emergency switch is electrically connected to the reversing valve and the pressure enabling valve. The emergency switch can be a UPS (Uninterruptible Power Supply). When the system loses power, the UPS will immediately switch to battery discharge mode to supply power to the reversing valve and the pressure enabling valve, thereby controlling the opening and closing of the reversing valve and the pressure enabling valve. The emergency switch can be connected to the reversing valve and the pressure enabling valve through a relay control method. The output terminal of the emergency switch is connected to the coil control terminal of the relay. The normally open contact of the relay is connected in series with the electromagnetic coil of the reversing valve and the pressure enabling valve in their respective control circuits.

[0049] Optionally, the emergency switch can also be mechanically connected to the directional valve and the pressure enabling valve. For example, the emergency switch is connected to the directional valve and the pressure enabling valve via a push rod. One end of the push rod is directly connected to the operating component of the emergency switch, and the other end extends into a guide sleeve and contacts the valve core control mechanism of the directional valve or the pressure enabling valve. When the emergency switch is pressed, the push rod moves forward under the guidance of the guide sleeve, directly pushing the valve core control mechanism of the valve, causing the valve core to actuate. The emergency switch and the directional valve and the pressure enabling valve can also be connected by a cam or other mechanical means; the specific connection method is not limited in this embodiment of the invention.

[0050] Optionally, such as Figure 1As shown, when closing the pressure enabling valve 43 and opening the reversing valve 63, the pressure enabling valve 43 can be closed first, followed by the opening of the reversing valve 63. This avoids additional power loss by utilizing the time difference between the two valves' reversing actions. If the reversing valve 63 is opened before the pressure enabling valve 43 is fully closed, the oil will flow directly to the oil tank 11 through the reversing valve 63, causing a momentary pressure drop and wasting energy. However, in this embodiment, the pressure enabling valve 43 is closed first to ensure the motor pump stops supplying pressure, and the system pressure drops to a low-pressure state; then the reversing valve 63 is opened. In this case, the switching of the reversing valve 63 only changes the direction of the oil circuit, thus avoiding energy loss.

[0051] like Figure 1 As shown, the emergency protection system for marine lifting and hoisting also includes a platform 5, which is used to support multiple valves in this embodiment of the present invention. For example, the second filter 14, accumulator 21, shut-off valve 22, reversing valve 63, pressure enabling valve 43, first check valve 44, one-way speed regulating valve 53, second check valve 64, and manual pump 81 are all located in the platform 5.

[0052] like Figure 1 As shown, the third pipeline 8 may also include a pressure sensor 84, which is used to read the pressure value on the third pipeline 8.

[0053] like Figure 1 As shown, the first return oil line also includes a first branch 65 and a spare socket 651 located on the first branch 65. The spare socket is used when other components are added to the system.

[0054] Combination Figure 1 As shown in the figure, the specific working principle of the emergency protection system for marine lifting and hoisting provided in this embodiment of the utility model is as follows:

[0055] Under normal operating conditions, i.e., when the power system is working normally, the pressure enabling valve 43 is opened and the reversing valve 63 is closed. The motor pump 12 starts and pumps oil from the oil tank 11 to the first oil outlet pipeline 4. The oil passes through the inlet 41 of the first oil outlet pipeline, the second filter 15, and the first check valve 44 in sequence. At the connection between the second end 52 of the second pipeline and the first oil outlet pipeline 4, the oil splits into two paths. One path of oil enters the second pipeline 5, passes through the shut-off valve 22 and the check valve 531 in sequence, and enters the accumulator 21 for oil storage. The other path of oil passes through the pressure enabling valve 43 and enters the brake oil tank 311 of the lifting brake assembly 3, and the lifting brake is lifted. The reversing valve 63 is opened and the pressure enabling valve 43 is closed. The oil flows out of the brake oil tank 311, passes through the inlet 61 of the first return oil pipeline, the reversing valve 63, the second check valve 64, and the outlet 62 of the first return oil pipeline, and enters the oil tank 11, and the lifting brake is engaged.

[0056] In emergency situations, such as sudden power outages, pressing the emergency switch opens the pressure enabling valve 43 and closes the reversing valve 63. Oil in the accumulator 21 passes through the speed regulating valve 532 and the shut-off valve 22. A small amount of oil enters the first outlet pipeline 4 from the second end 52 of the second pipeline, then passes through the pressure enabling valve 43 and enters the lifting brake assembly 3, causing the lifting brake to lift. Pressing the emergency switch again opens the reversing valve 63 and closes the pressure enabling valve 43. Oil flows out of the brake oil tank 311, passes through the inlet 61 of the first return pipeline, the reversing valve 63, the second check valve 64, and the outlet 62 of the first return pipeline, entering the oil tank 11, and the lifting brake engages. In emergency situations, the above-mentioned brake lifting and clamping can be repeated multiple times to avoid the loss of control caused by the complete release of oil in the accumulator at one time, and to prevent structural damage caused by continuous locking. This can avoid equipment damage or accident escalation caused by rigid braking, improve the safety of marine lifting and hoisting in emergency situations such as sudden power outages, and buy time to restore control.

[0057] In the event of a sudden power outage or other emergency and when there is no oil in the accumulator, manually close the reversing valve 63 and operate the manual pump 81. Oil enters the third pipeline 8 from the inlet 82, then flows through the outlet 83 to the lifting brake assembly 3, raising the lifting brake. Manually open the reversing valve 63, and oil flows out of the brake oil tank 311, passing through the inlet 61 of the first return oil line, the reversing valve 63, the second check valve 64, and the outlet 62 of the first return oil line, entering the oil tank 11, tightening the lifting brake.

[0058] In this invention, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0059] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An emergency protection system for marine lifting and hoisting operations, characterized in that, include: Fuel tank assembly, energy storage assembly, hoisting brake assembly, first oil outlet line, second line, first oil return line, and emergency switch; The oil tank assembly includes an oil tank and a motor pump. The oil inlet of the motor pump is connected to the oil tank, the oil outlet of the motor pump is connected to the oil inlet of the first oil outlet pipeline, and the oil tank is connected to the oil outlet of the first oil return pipeline. The energy storage assembly includes an accumulator and a shut-off valve. The second pipeline includes a first end and a second end. The oil outlet of the accumulator is connected to the first end of the second pipeline. The shut-off valve is located on the second pipeline. The second end of the second pipeline is connected to the first oil outlet pipeline. The hoisting brake assembly is connected to the oil outlet of the first oil outlet pipeline, and the hoisting brake assembly is also connected to the oil inlet of the first oil return pipeline. The first oil outlet pipeline also includes a pressure enabling valve and a first check valve. The first check valve is located between the second end of the second pipeline and the oil inlet of the first oil outlet pipeline. The oil inlet of the first check valve is connected to the oil outlet of the motor pump. The oil outlet of the first check valve is connected to the pressure enabling valve. The pressure enabling valve is located between the second end of the second pipeline and the oil outlet of the first oil outlet pipeline. The first return oil line also includes a reversing valve. The emergency switch is connected to the reversing valve and the pressure enabling valve. The emergency switch is used to open the pressure enabling valve and close the reversing valve, or to close the pressure enabling valve and open the reversing valve.

2. The emergency protection system for marine lifting and hoisting as described in claim 1, characterized in that, The second pipeline also includes a one-way speed control valve, which includes a one-way valve and a speed control valve. The oil inlet of the one-way valve is connected to the shut-off valve, the oil outlet of the one-way valve is connected to the accumulator, the oil inlet of the speed control valve is connected to the accumulator, and the oil outlet of the speed control valve is connected to the shut-off valve.

3. The emergency protection system for marine lifting and hoisting as described in claim 1, characterized in that, The emergency protection system for marine lifting and hoisting also includes a third pipeline and a manual pump located on the third pipeline. The oil inlet of the third pipeline is connected to the oil tank, and the oil outlet of the third pipeline is connected to the hoisting brake assembly.

4. The emergency protection system for marine lifting and hoisting as described in claim 3, characterized in that, The hoisting brake assembly includes at least one brake part and an oil port connector. Each brake part includes a brake fluid tank. Each brake fluid tank is connected to the oil port connector via a pipeline. The oil outlet of the first oil outlet pipeline, the oil inlet of the first oil return pipeline, and the oil outlet of the third pipeline are all connected to the oil port connector.

5. The emergency protection system for marine lifting and hoisting as described in claim 2, characterized in that, The emergency protection system for marine lifting and hoisting also includes a fourth pipeline and an overflow valve located on the fourth pipeline. The oil inlet of the fourth pipeline is located between the one-way speed control valve and the accumulator, and the oil outlet of the fourth pipeline is located inside the oil tank.

6. The emergency protection system for marine lifting and hoisting as described in claim 1, characterized in that, The fuel tank assembly also includes an airbag. The fuel tank is a closed fuel tank, and the shell of the closed fuel tank has an air cavity through hole. The airbag communicates with the air cavity through hole.

7. The emergency protection system for marine lifting and hoisting as described in claim 1, characterized in that, The oil tank assembly also includes a first filter and a second filter, the first filter being connected to the oil inlet of the motor pump and the second filter being connected to the oil outlet of the motor pump.

8. The emergency protection system for marine lifting and hoisting as described in claim 1, characterized in that, The first return oil line also includes a second check valve, the inlet of which is connected to the reversing valve, and the outlet of which is connected to the outlet of the first return oil line.

9. The emergency protection system for marine lifting and hoisting as described in claim 1, characterized in that, The second pipeline also includes a pressure sensor, which is capable of detecting the pipeline pressure between the shut-off valve and the pressure-enabled valve.

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