Hydraulic winch emergency recovery system and device

Abstract

The invention provides a hydraulic winch emergency recovery system and device.The system comprises a normal winding and unwinding loop, a storage loop and an emergency lowering loop, and the normal winding and unwinding loop comprises a pump station, a main pump, an operating valve, a winch valve set and a winch motor; the storage loop comprises a pump station, a main pump, an operating valve, a one-way valve, an energy accumulator, a first stop valve, a variable-amplitude oil cylinder and a safety valve. The emergency lowering loop comprises an operating valve, a second stop valve, a variable-amplitude oil cylinder, a gravity release valve, an emergency reversing valve and a winch motor. The energy accumulator is used for increasing the pressure of hydraulic oil, the emergency recovery function of the rescue boat is achieved, and the control principle is simple and reliable.

Description

Technical Field

[0001] This invention relates to a hydraulic winch emergency recovery system and device. Background Technology

[0002] With the increasing number of maritime rescue missions, the reliability and emergency operation capability of rescue boat launching and retrieving devices are of particular importance as an important part of the ship rescue system. At present, the rescue boat launching and retrieving devices commonly used on ships are mainly driven by hydraulic winch systems. These systems typically include core components such as hydraulic motors, brakes, control valve groups, and hydraulic pumps, which enable the normal launching and retrieving of rescue boats.

[0003] However, existing rescue boat launching and recovering devices still have some technical problems when dealing with large rescue boats with a working load exceeding 30KN. Especially when the ship loses power and the rescue boat needs to be fully loaded for lifting, it is difficult to achieve the emergency recovery function of the rescue boat using traditional manual pumps due to the limited human power. In addition, the winch hydraulic motor and valves have unavoidable leakage problems, resulting in low system efficiency and further increasing the difficulty of emergency recovery.

[0004] Although existing technologies employ accumulator-assisted oil supply schemes, under heavy load conditions, the energy storage capacity and oil supply efficiency of accumulators are often insufficient to meet the needs of emergency recovery, especially in situations requiring continuous operation or multiple recovery cycles.

[0005] Therefore, there is an urgent need for a hydraulic winch emergency recovery system and device that can efficiently recover heavy-load rescue boats in the event of a power failure, so as to improve the reliability and emergency operation capability of ship rescue systems. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a hydraulic winch emergency recovery system and device. This system uses an accumulator to increase the pressure of the hydraulic oil, enabling the emergency recovery function of the rescue boat. The control principle is simple and reliable. This objective is achieved as follows:

[0007] This invention proposes a hydraulic winch emergency recovery system, including a normal recovery and deployment circuit, a storage circuit, and an emergency lowering circuit. The normal recovery and deployment circuit includes: a pump station, a main pump, an operating valve, a winch valve assembly, and a winch motor. The storage circuit includes: a pump station, a main pump, an operating valve, a check valve, an accumulator, a first shut-off valve, a luffing cylinder, and a safety valve. The emergency lowering circuit includes: an operating valve, a second shut-off valve, a luffing cylinder, a gravity release valve, an emergency directional valve, and a winch motor.

[0008] During normal winch operation, hydraulic oil flows through the normal operation circuit. The pump station drives the main pump to supply hydraulic oil to the control valve and winch valve assembly. The winch valve assembly then supplies oil to the hydraulic motor, driving the winch to operate the rescue boat. During winch storage, hydraulic oil flows through the storage circuit. The piston rod of the luffing cylinder is fully retracted, and the rescue boat is retracted. The cylinder operating handle of the control valve is also in the retracted position. Hydraulic oil output from the main pump fills the accumulator through the check valve. When the accumulator reaches the set pressure of the safety valve, the accumulator is fully pressurized and the pressurized oil is stored in the accumulator. The first shut-off valve is used to depressurize the accumulator during pipeline maintenance. During emergency winch lowering, hydraulic oil flows through the emergency lowering circuit. At this time, the second shut-off valve is open, and the control valve is in the extended position. The hydraulic oil pre-stored in the accumulator flows through the control valve, causing the luffing cylinder to extend fully, extending the rescue boat overboard. The gravity release valve is controlled, and the pressurized oil in the accumulator lowers the winch to the water surface.

[0009] Furthermore, when recovering the rescue boat in a power failure state, the second shut-off valve in the emergency lowering circuit remains open, while the emergency reversing valve opens. The pressure oil stored in the accumulator enters the winch hoisting oil circuit through the emergency reversing valve, causing the winch to recover the rescue boat.

[0010] Furthermore, the pump station has a built-in manual pump. When the pressurized oil stored in the accumulator is used up, hydraulic oil is replenished to the accumulator through the manual pump. At this time, the hydraulic cylinder operating handle of the control valve is in the extended position, and the hydraulic oil supplied by the manual pump enters the accumulator. When the oil is filled to the set pressure of the safety valve, the accumulator pressurization ends. By using the manual pump to slowly build up pressure and the accumulator to quickly release pressure, the energy storage characteristics of the accumulator are fully utilized, enabling the rescue boat to be recovered quickly and effectively in emergency situations.

[0011] Furthermore, the hydraulic winch emergency recovery system uses a hydraulic winch emergency recovery device, which includes a mother ship. A pump station is installed on the upper part of the mother ship, and a manual pump is installed on the pump station. The mother ship is also equipped with a launch and recovery body. A rescue boat is installed at the end of the launch and recovery body via a steel wire rope. An accumulator, a winch motor, an emergency reversing valve, and a luffing cylinder are installed on the launch and recovery body.

[0012] Compared with the prior art, the beneficial effects of the present invention are: the system has a simple and reliable control principle, requires little modification to the original hydraulic system, and can be applied to the upgrading and transformation of existing equipment;

[0013] The accumulator can charge oil at a pressure greater than the lifting pressure of the rescue boat, ensuring sufficient power in the event of a power outage. The accumulator has a large oil supply capacity, and the leakage of the motor and valve group has little impact on pressure establishment, enabling the rescue boat to lift rapidly. This effectively solves the problem of low efficiency of traditional manual pumps under heavy loads. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the hydraulic pipeline of a hydraulic winch emergency recovery system.

[0015] Figure 2 This is a structural schematic diagram of a hydraulic winch emergency recovery device;

[0016] In the diagram: 1. Pump station, 2. Manual pump, 3. Main pump, 4. Control valve, 5. Safety valve, 6. First shut-off valve, 7. Check valve, 8. Second shut-off valve, 9. Emergency directional valve, 10. Gravity release valve, 11. Accumulator, 12. Luffing cylinder, 13. Winch valve assembly, 14. Winch motor, 15. Rescue boat, 16. Mother ship, 17. Launching and recovering vessel. Detailed Implementation

[0017] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and accompanying drawings. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0018] Example 1

[0019] like Figure 1 As shown, a hydraulic winch emergency recovery system includes a normal recovery and deployment circuit, a storage circuit, and an emergency lowering circuit. The normal recovery and deployment circuit includes a pump station 1, a main pump 3, an operating valve, a winch valve group 13, and a winch motor 14. During normal winch recovery and deployment, hydraulic oil flows through the normal recovery and deployment circuit. The specific working process is as follows: the pump station 1 drives the main pump 3 to deliver hydraulic oil to the operating valve 4 and the winch valve group 13. The winch valve group 13 then supplies oil to the hydraulic motor, thereby driving the winch to perform the recovery and deployment operation of the rescue boat 15. This design can ensure that the system has a stable hydraulic power source under normal working conditions, ensuring the smooth recovery and deployment operation of the rescue boat 15.

[0020] The storage circuit includes pump station 1, main pump 3, operating valve, check valve 7, accumulator 11, first shut-off valve 6, luffing cylinder 12, and safety valve 5. When the winch is stored, hydraulic oil flows through the storage circuit. At this time, the piston rod of luffing cylinder 12 is in the fully retracted position, and rescue boat 15 is also retracted into the hull accordingly. The cylinder operating handle of operating valve 4 is in the retracted position. The hydraulic oil output from main pump 3 enters accumulator 11 through check valve 7 for oil filling. When the oil filling pressure reaches the set pressure of safety valve 5, the accumulator 11 pressurization process ends, and the pressurized oil is stored in accumulator 11 to provide an energy source for subsequent emergency operations. The purpose of the first shut-off valve 6 is to depressurize accumulator 11 during pipeline maintenance to ensure maintenance safety. This design enables the system to automatically store energy under normal conditions, preparing for possible emergency situations.

[0021] The emergency lowering circuit includes an operating valve, a second shut-off valve 8, a luffing cylinder 12, a gravity release valve 10, an emergency directional valve 9, and a winch motor 14. During emergency lowering of the winch, hydraulic oil flows through the emergency lowering circuit. At this time, the second shut-off valve 8 is open, the operating valve 4 is in the extended position, and the hydraulic oil pre-stored in the accumulator 11 flows through the operating valve 4, causing the luffing cylinder 12 to extend fully, thereby extending the rescue boat 15 overboard. Then, by controlling the gravity release valve 10, the pressure oil from the accumulator 11 drives the winch to lower the rescue boat 15 to the water surface. This design ensures that even if the main pump station 1 fails, the system can still use the pre-stored energy to complete the emergency lowering operation of the rescue boat 15, improving the reliability of the lifesaving equipment.

[0022] When retrieving the rescue boat 15 in a power failure state, the second shut-off valve 8 in the emergency lowering circuit remains open, and at the same time the emergency reversing valve 9 opens. The pressure oil stored in the accumulator 11 enters the winch hoisting oil circuit through the emergency reversing valve 9, driving the winch to retrieve the rescue boat 15. This design enables the system to complete the retrieval operation of the rescue boat 15 even in the extreme case of failure of the ship's power system, further improving the emergency response capability of the lifesaving system.

[0023] In a preferred embodiment, the pump station 1 is equipped with a manual pump 2. When the pressure oil stored in the accumulator 11 is used up, hydraulic oil can be replenished to the accumulator 11 by the manual pump 2. At this time, the cylinder operating handle of the control valve 4 is in the extended position, and the hydraulic oil supplied by the manual pump 2 enters the accumulator 11. When the filling pressure reaches the set pressure of the safety valve 5, the filling process of the accumulator 11 ends. This design provides a backup plan for the system with manual operation. Even if the hydraulic system is completely depressurized, the system function can still be restored by manually operating the manual pump 2, ensuring that the emergency operation of the rescue boat 15 can be successfully completed under various extreme conditions.

[0024] The hydraulic winch emergency recovery system achieves three major functions—normal operation, energy storage, and emergency operation—through three different circuit designs. The manual pump 2 design provides a final manual backup solution. The system components are tightly connected and logically clear, ensuring the smooth deployment and retrieval of the rescue boat 15 under normal ship operation and various emergency conditions, thus improving the reliability and safety of marine life-saving equipment.

[0025] Example 2

[0026] like Figure 2As shown, the hydraulic winch emergency recovery system uses a hydraulic winch emergency recovery device, which includes a mother ship 16. A pump station 1 is installed on the upper part of the mother ship 16, and a manual pump 2 is installed on the pump station 1. A recovery and deployment body 17 is also installed on the mother ship 16. A rescue boat 15 is installed at the end of the recovery and deployment body 17 via a steel wire rope. An accumulator 11, a winch motor 14, an emergency reversing valve 9, and a luffing cylinder 12 are installed on the recovery and deployment body 17.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A hydraulic winch emergency recovery system, characterized in that, It includes a normal recovery and deployment circuit, a storage circuit, and an emergency deployment circuit. The normal recovery and deployment circuit includes: a pump station, a main pump, an operating valve, a winch valve assembly, and a winch motor. The storage circuit includes: a pump station, a main pump, an operating valve, a check valve, an accumulator, a first shut-off valve, a luffing cylinder, and a safety valve. The emergency deployment circuit includes: an operating valve, a second shut-off valve, a luffing cylinder, a gravity release valve, an emergency directional valve, and a winch motor. During normal winch operation, hydraulic oil flows through the normal operation circuit. The pump station drives the main pump to supply hydraulic oil to the control valve and winch valve assembly. The winch valve assembly then supplies oil to the hydraulic motor, driving the winch to operate the rescue boat. During winch storage, hydraulic oil flows through the storage circuit. The piston rod of the luffing cylinder is fully retracted, and the rescue boat is retracted. The cylinder operating handle of the control valve is also in the retracted position. Hydraulic oil output from the main pump fills the accumulator through the check valve. When the accumulator reaches the set pressure of the safety valve, the accumulator is fully pressurized and the pressurized oil is stored in the accumulator. The first shut-off valve is used to depressurize the accumulator during pipeline maintenance. During emergency winch lowering, hydraulic oil flows through the emergency lowering circuit. At this time, the second shut-off valve is open, and the control valve is in the extended position. The hydraulic oil pre-stored in the accumulator flows through the control valve, causing the luffing cylinder to extend fully, extending the rescue boat overboard. The gravity release valve is controlled, and the pressurized oil in the accumulator lowers the winch to the water surface.

2. The hydraulic winch emergency recovery system according to claim 1, characterized in that, When recovering the rescue boat in a power failure state, the second shut-off valve in the emergency lowering circuit remains open, and at the same time the emergency reversing valve opens. The pressure oil stored in the accumulator enters the winch hoisting oil circuit through the emergency reversing valve, so that the winch recovers the rescue boat.

3. The hydraulic winch emergency recovery system according to claim 2, characterized in that, The pump station has a built-in manual pump. When the pressure oil stored in the accumulator is used up, hydraulic oil is replenished to the accumulator through the manual pump. At this time, the hydraulic cylinder operating handle of the control valve is in the extended position. The hydraulic oil supplied by the manual pump enters the accumulator. When the oil is filled to the set pressure of the safety valve, the accumulator is pressurized.

4. The hydraulic winch emergency recovery system according to claim 3, characterized in that, The hydraulic winch emergency recovery system uses a hydraulic winch emergency recovery device, which includes a mother ship. A pump station is installed on the upper part of the mother ship, and a manual pump is installed on the pump station. The mother ship is also equipped with a recovery and deployment body. A rescue boat is installed at the end of the recovery and deployment body via a steel wire rope. An accumulator, a winch motor, an emergency reversing valve, and a luffing cylinder are installed on the recovery and deployment body.

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