A rescue boat launching and recovery device hydraulic winch emergency system

Abstract

The application discloses an emergency system of a rescue boat launching and recovering device hydraulic winch, which comprises a hydraulic motor, a brake connected with the hydraulic motor, a motor valve group for controlling rotation of the hydraulic motor, a control valve group for delivering hydraulic oil to the motor valve group, a hydraulic pump for inputting hydraulic oil from an oil tank to the control valve group, and an emergency pump group; an oil inlet of the emergency pump group is connected with the oil tank, and an oil outlet of the emergency pump group is connected with an oil inlet of the control valve group; a stop valve and an emergency reversing valve are arranged between the control valve group and the motor valve group, and the stop valve is located between the control valve group and an A port of the motor valve group; after the stop valve is closed, hydraulic oil going to the A port of the motor valve group enters the motor valve group through the emergency reversing valve. Through the arrangement of the emergency pump group, the stop valve and the emergency reversing valve, efficient and convenient use of the hydraulic winch in an emergency is realized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of sea rescue, and particularly relates to an emergency system of a hydraulic winch of a rescue boat launching and recovery device. BACKGROUND

[0002] A rescue boat is a kind of ship specially designed for personnel rescue in emergency situations. They are usually deployed in large ships such as passenger ships, cargo ships and offshore platforms, etc. to quickly respond in the event of an accident or emergency, ensuring the safe evacuation of personnel on board. Rescue boats are designed to take into account factors such as quick start, easy operation and high reliability to adapt to various adverse sea conditions.

[0003] In order to ensure that the rescue boat can be put into use in time and effectively, each ship equipped with a rescue boat is installed with a corresponding launching and recovery device. This kind of device is responsible for smoothly launching the rescue boat from the storage position to the water surface, and also can safely recover it to the original position after completing the task. Traditional rescue boat launching and recovery systems mainly include various forms such as boom type and slide type, and new design concepts and technical means are continuously introduced to improve their performance as technology advances.

[0004] One of the widely used emergency release and recovery mechanisms is a hydraulic winch system based on a combination of accumulators and manual pumps. Although this configuration can meet the basic needs to some extent, there are still obvious defects in actual operation. Since the entire process relies on the operator to provide power through the manual pump, when facing a large workload (such as more than 30 kilonewtons), it is difficult for human power to complete effective operation. Even under lighter load conditions, inevitable leakage occurs between the hydraulic motor and the associated valve components, resulting in a significant decrease in overall work efficiency. In recent years, as safety requirements have improved and larger capacity rescue boats (such as 45 kilonewtons, 60 kilonewtons) have been increasingly widely used, the traditional method has gradually become inadequate and cannot meet the standards specified in the current regulations. In the event of a power system failure on the mother ship, resulting in a loss of power on the entire ship, the traditional rescue boat launching and recovery device relying on electric or hydraulic drive will face serious operational obstacles. Most modern rescue boat launching and recovery systems rely on electrically driven winches and hydraulic pumps to complete the lifting and lowering actions. Once the mother ship loses power supply, these devices will not work properly, directly leading to the rescue boat being unable to be quickly and effectively released to the water surface or recovered from the water. SUMMARY

[0005] The present application aims to provide a rescue boat launching and recovery device hydraulic winch emergency system to solve the technical problem of how to efficiently and conveniently release and recover the rescue boat in an emergency situation.

[0006] To achieve the above object, the specific technical scheme of the hydraulic winch emergency system of the rescue boat launching and recovering device is as follows:

[0007] The hydraulic winch emergency system of the rescue boat launching and recovering device comprises a hydraulic motor, a brake connected with the hydraulic motor, a motor valve group for controlling rotation of the hydraulic motor, a control valve group for delivering hydraulic oil to the motor valve group, a hydraulic pump for inputting hydraulic oil from an oil tank to the control valve group, and an emergency pump group.

[0008] The oil inlet of the emergency pump group is connected with the oil tank, and the oil outlet of the emergency pump group is connected with the oil inlet of the control valve group.

[0009] A stop valve and an emergency reversing valve are arranged between the control valve group and the motor valve group, the stop valve is located between the control valve group and the motor valve group A port, and when the oil path is closed by the stop valve, the hydraulic oil going to the motor valve group A port enters the motor valve group through the emergency reversing valve.

[0010] As a further improvement of the present application, the motor valve group comprises a first balance valve, a second balance valve, a shuttle valve, a first pressure reducing valve, a second pressure reducing valve, a hydraulic control reversing valve, a throttle valve, a sequence valve and a one-way valve; the motor valve group A port is connected with the oil inlet of the first balance valve, the oil outlet of the first balance valve is connected with the A port of the hydraulic motor, the motor valve group B port is connected with the oil inlet of the second balance valve, the oil outlet of the second balance valve is connected with the B port of the hydraulic motor, the oil outlet of the hydraulic control reversing valve is respectively connected with the B port of the hydraulic motor and the oil inlet of the throttle valve, the oil outlet of the throttle valve is connected with the A port of the hydraulic motor, the oil outlet of the shuttle valve is connected with the oil inlet of the second pressure reducing valve, the oil outlet of the second pressure reducing valve is connected with the oil inlet of the sequence valve, the oil outlet of the sequence valve is connected with the brake, the oil outlet of the first pressure reducing valve is connected with the oil inlet of the one-way valve, and the oil outlet of the one-way valve is connected with the A port of the hydraulic motor.

[0011] As a further improvement of the present application, the oil outlet of the emergency reversing valve is connected with the oil inlet of the hydraulic control reversing valve, and the hydraulic oil discharged from the emergency reversing valve enters the hydraulic control reversing valve to open it, the hydraulic oil passing through the hydraulic control reversing valve enters the hydraulic motor through the throttle valve to realize the adjustment of the rotation speed of the hydraulic motor.

[0012] As a further improvement of the present application, the oil outlet of the emergency reversing valve is connected with the oil inlet of the shuttle valve, and the hydraulic oil discharged from the emergency reversing valve enters the brake through the shuttle valve, the second pressure reducing valve and the sequence valve in sequence to make the brake separate from the hydraulic motor.

[0013] As a further improvement of the present application, the oil outlet of the emergency reversing valve is connected with the oil inlet of the first pressure reducing valve, and the hydraulic oil discharged from the emergency reversing valve enters the hydraulic motor through the first pressure reducing valve and the check valve in sequence, realizing oil supplement during the descending process of the hydraulic motor.

[0014] As a further improvement of the present application, the emergency pump group is communicated with the oil tank and the oil inlets of the control valve group through quick couplings.

[0015] As a further improvement of the present application, the control valve group controls the hydraulic oil to enter the A port or the B port of the motor valve group through a proportional reversing valve.

[0016] As a further improvement of the present application, the brake is a normally closed brake, and the hydraulic oil enters the brake to separate the brake from the hydraulic motor.

[0017] As a further improvement of the present application, the proportional reversing valve and the emergency reversing valve are provided with a manual operation function.

[0018] Beneficial effects:

[0019] The system of the present application can quickly take over the work in the case of failure of the main hydraulic pump group by introducing the emergency pump group as a backup power source, ensuring that the rescue boat can be smoothly completed even in an emergency, greatly improving the reliability and safety of the entire system.

[0020] The proportional reversing valve is adopted to accurately control the flow direction and flow rate of the hydraulic oil, so that the adjustment of the rotation speed of the hydraulic motor is more flexible and accurate, thereby optimizing the speed and stability of the release and recovery of the rescue boat and effectively reducing the operation errors caused by human factors.

[0021] The proportional reversing valve and the emergency reversing valve are both provided with a manual operation function, allowing the operator to flexibly select automatic or manual mode for control according to the actual situation, which not only facilitates daily maintenance and repair, but also enhances the human-machine interaction friendliness in case of emergencies.

[0022] The brake is designed as a normally closed structure, which always maintains a locked state without external command input; only when the hydraulic oil with sufficient pressure acts on it, the brake will be unlocked and allow the hydraulic motor to rotate freely, ensuring that even in the case of power interruption and other extreme conditions, the occurrence of accidental sliding accidents can be avoided.

[0023] The first pressure reducing valve-check valve path is specially set to realize effective supplement of the hydraulic motor during the descending process, solving the unstable working phenomenon caused by internal leakage and other reasons in the traditional system, and further strengthening the continuity and stability of the equipment operation.

[0024] The emergency pump unit is connected to the fuel tank via a quick-connect coupling, which facilitates installation, disassembly, and regular maintenance and replacement of parts. This reduces maintenance costs and shortens the time required for troubleshooting, which is especially important for maritime rescue facilities that require frequent use.

[0025] In summary, the novel hydraulic winch emergency system for rescue boat launching and recovering proposed in this invention not only overcomes the shortcomings of existing technologies, but also significantly improves overall performance through a series of innovative designs, meeting the demands of the modern maritime safety field for high-end equipment that is efficient, reliable, and easy to manage. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a hydraulic winch emergency system for a rescue boat launching and recovering device according to the present invention;

[0027] The markings in the diagram are as follows: 10, Hydraulic motor; 20, Brake; 30, Motor valve assembly; 31, First balance valve; 32, Second balance valve; 33, Shuttle valve; 34, First pressure reducing valve; 35, Second pressure reducing valve; 36, Hydraulic directional valve; 37, Throttle valve; 38, Sequence valve; 39, Check valve; 40, Control valve assembly; 41, Proportional directional valve; 50, Hydraulic pump; 60, Oil tank; 70, Emergency pump assembly; 71, Quick coupling; 80, Shut-off valve; 90, Emergency directional valve. Detailed Implementation

[0028] To better understand the purpose, structure, and function of this invention, the following detailed description of a hydraulic winch emergency system for a rescue boat launching and retrieving device, in conjunction with the accompanying drawings, is provided.

[0029] Implementation example:

[0030] like Figure 1 As shown, an emergency hydraulic winch system for a rescue boat launching and recovering device includes a hydraulic motor 10 for controlling the rotation of the hydraulic winch, a brake 20, a motor valve group 30 for controlling the rotation of the hydraulic motor 10, a control valve group 40, a hydraulic pump 50, and an oil tank 60. An emergency pump group 70 is connected in parallel with the hydraulic pump 50 between the oil tank 60 and the control valve group 40. A shut-off valve 80 and an emergency directional valve 90 are located between the control valve group 40 and the motor valve group 30. During normal operation of the hydraulic winch, hydraulic oil is pumped into the control valve group 40 by the hydraulic pump 50. The proportional directional valve 41 switches the flow of hydraulic oil to the A / B ports of the hydraulic motor 10, enabling the hydraulic motor 10 to rotate in both directions. When the mother ship loses power and an emergency launching and recovering of the rescue boat is required, the emergency pump group 70 is connected via a quick connector 71. The shut-off valve 80 cuts off the oil circuit between the control valve group and the A port of the hydraulic motor, and the hydraulic oil enters the motor valve group 30 through the emergency directional valve 90.

[0031] The motor valve group comprises a first balance valve 31, a second balance valve 32, a shuttle valve 33, a first pressure reducing valve 34, a second pressure reducing valve 35, a hydraulic control reversing valve 36, a throttle valve 37, a sequence valve 38, and a check valve 39. The motor valve group A port is connected to the first balance valve 31 inlet, the first balance valve 31 outlet is connected to the hydraulic motor A port, the motor valve group B port is connected to the second balance valve 32 inlet, the second balance valve 32 outlet is connected to the hydraulic motor B port, the hydraulic control reversing valve 36 outlet is connected to the hydraulic motor B port and the throttle valve 37 inlet, the throttle valve 37 outlet is connected to the hydraulic motor A port, the shuttle valve 33 outlet is connected to the second pressure reducing valve 35 inlet, the second pressure reducing valve 35 outlet is connected to the sequence valve 38 inlet, the sequence valve 38 outlet is connected to the brake 20, the first pressure reducing valve 34 outlet is connected to the check valve 39 inlet, the check valve 39 outlet is connected to the hydraulic motor A port, and the emergency reversing valve 90 outlet is connected to the hydraulic control reversing valve 36, the shuttle valve 33, and the first pressure reducing valve 34 inlet.

[0032] When the emergency pump group 70 is connected, the hydraulic oil output by the emergency pump group 70 is used as power to supply oil to the system. When the rescue boat needs to be recovered, the proportional reversing valve 41 handle is switched to the "recovery" position to supply oil to the hydraulic motor through the control valve group 40 to drive the winch to recover the rescue boat. When the rescue boat needs to be released, the emergency pump group 70 is started, and the control valve group 40 and the motor valve group A port are cut off by the control valve 80 to prevent the oil supplied by the emergency pump group from entering the motor valve group 30 through the A port. The handle of the proportional reversing valve 41 is switched to the "lowering" position, and the handle of the emergency reversing valve 90 is switched at the same time, so that the hydraulic oil of the emergency pump group 70 enters the motor valve group 30 through the emergency reversing valve 90. The hydraulic oil entering the motor valve group 30 through the emergency reversing valve 90 is divided into three paths, one path opens the hydraulic control reversing valve 36, one path passes through the shuttle valve 33, the second pressure reducing valve 35, and the sequence valve 38 to open the brake 20, so that the brake 20 is separated from the hydraulic motor 10, and the last path passes through the first pressure reducing valve 34 and the check valve 39 to supply oil to the hydraulic motor A port. At this time, since the brake 20 is opened, the winch is passively lowered under the gravity of the rescue boat, and the lowering speed can be adjusted by limiting the return flow of the hydraulic motor 10 through the throttle valve 37. During the lowering process of the hydraulic motor 10, the hydraulic motor 10 is supplied with oil through the first pressure reducing valve 34 to prevent the hydraulic motor 10 from stalling due to air suction. During the lowering process, if intermediate stopping is required, the emergency reversing valve 90 is reset by the spring, the emergency pump group stops supplying oil to the motor valve group 30, the brake 20 brakes the hydraulic motor 10, and the hydraulic winch stops.

[0033] According to GB / T 11626 《Ship and Marine Technology Hoisting Rescue Boat Launching Device》 requirements, the rescue boat launching device hydraulic power winch in the emergency state of power failure should have the following two capabilities: 1, the launching device should only rely on gravity or not dependent on the ship power storage mechanical energy to lower the boat. 2, the ability to manually recover the full load rescue boat from the water to the boat storage place. To meet the above two specification requirements, the existing rescue boat launching device usually uses the accumulator and manual pump way. The rescue boat launching device pre-charges the accumulator with enough pressure, and the hydraulic power winch uses the hydraulic energy stored in the accumulator to open the winch brake through the control valve in the power failure state of the mother ship, and lowers the rescue boat to the water surface. When the rescue boat needs to be lifted in the power failure state, the manual pump installed on the pump station provides power for the winch motor, and the rescue boat is recovered from the water surface to the storage position of the mother ship. The biggest disadvantage of the emergency mode using accumulator and manual pump is that the human work is limited, and the efficiency is very low due to the inevitable leakage of the winch hydraulic motor and valve. For rescue boats with a working load of more than 30KN, manual pump cannot realize the recovery function. With the increasing application of large rescue boats such as 45KN and 60KN, the original way cannot meet the specification requirements.

[0034] The system of the present application can meet the emergency recovery of various large rescue boats by using an emergency pump set as an emergency power source, greatly improving the recovery efficiency and solving the problem of manual pump unable to recover in emergency. Compared with the conventional emergency mode, the accumulator is cancelled, and there is no need to charge and discharge the accumulator, which simplifies the operation process and reduces the operation time. The emergency pump set adopts a roller movable type, and is connected with the main pump station of the equipment by a quick connector. The two rescue boat launching devices on the left and right sides of the mother ship can share one diesel pump set, saving valuable space on the ship and reducing manufacturing cost.

[0035] It can be understood that the present application is described by some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the present application. In addition, under the guidance of the present application, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the present application. Therefore, the present application is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope of the present application.

Claims

1. A rescue boat launching and recovery device hydraulic winch emergency system, characterized in that, The hydraulic motor, the brake connected with the hydraulic motor, the motor valve group controlling the rotation of the hydraulic motor, the control valve group delivering hydraulic oil to the motor valve group, the hydraulic pump delivering hydraulic oil from the oil tank to the control valve group, and the emergency pump group; The emergency pump group is connected with the oil tank, and the emergency pump outlet is connected with the oil inlet of the control valve group; The control valve group and the motor valve group are provided with a stop valve and an emergency reversing valve, the stop valve is located between the control valve group and the motor valve group A port, and when the stop valve closes the oil path, the hydraulic oil going to the motor valve group A port enters the motor valve group through the emergency reversing valve; The motor valve group includes a first balance valve, a second balance valve, a shuttle valve, a first pressure reducing valve, a second pressure reducing valve, a hydraulic control reversing valve, a throttle valve, a sequence valve, and a check valve; The motor valve group A port is connected with the oil inlet of the first balance valve, the oil outlet of the first balance valve is connected with the A port of the hydraulic motor, the motor valve group B port is connected with the oil inlet of the second balance valve, the oil outlet of the second balance valve is connected with the B port of the hydraulic motor, the oil outlet of the hydraulic control reversing valve is respectively connected with the B port of the hydraulic motor and the oil inlet of the throttle valve, the oil outlet of the throttle valve is connected with the A port of the hydraulic motor, the oil outlet of the shuttle valve is connected with the oil inlet of the second pressure reducing valve, the oil outlet of the second pressure reducing valve is connected with the oil inlet of the sequence valve, the oil outlet of the sequence valve is connected with the brake, the oil outlet of the first pressure reducing valve is connected with the oil inlet of the check valve, and the oil outlet of the check valve is connected with the A port of the hydraulic motor.

2. The emergency system of a rescue boat launch and recovery hydraulic winch according to claim 1, characterized in that, The oil outlet of the emergency reversing valve is connected with the oil inlet of the hydraulic control reversing valve, the hydraulic oil discharged from the emergency reversing valve enters the hydraulic control reversing valve to open it, the hydraulic oil passing through the hydraulic control reversing valve enters the hydraulic motor through the throttle valve to realize the speed regulation of the hydraulic motor.

3. The emergency system of a rescue boat launching device hydraulic winch according to claim 1, characterized in that, The oil outlet of the emergency reversing valve is connected with the oil inlet of the shuttle valve, the hydraulic oil discharged from the emergency reversing valve enters the brake through the shuttle valve, the second pressure reducing valve, and the sequence valve in sequence to make the brake separate from the hydraulic motor.

4. The emergency system of the hydraulic winch of the rescue boat launching and retrieving device according to claim 1, characterized in that, The oil outlet of the emergency reversing valve is connected with the oil inlet of the first pressure reducing valve, the hydraulic oil discharged from the emergency reversing valve enters the hydraulic motor through the first pressure reducing valve and the check valve in sequence to realize the oil supplement during the descending process of the hydraulic motor.

5. The emergency system of the hydraulic winch of the rescue boat launching and recovery device according to claim 1, characterized in that, The emergency pump group is connected with the oil tank and the oil inlets of the control valve group through quick couplings.

6. The rescue boat deployment hydraulic winch emergency system of claim 1, wherein, The control valve group controls the hydraulic oil to enter the A port or the B port of the motor valve group through a proportional reversing valve.

7. The emergency system of a rescue boat launching device hydraulic winch according to claim 1, characterized in that, The brake is a normally closed brake, the hydraulic oil enters the brake to make the brake separate from the hydraulic motor.

8. The rescue boat deployment hydraulic winch emergency system of claim 6, wherein, The proportional reversing valve and the emergency reversing valve are provided with a manual operation function.

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