Hydraulic winch emergency system of rescue boat retracting and releasing device

Abstract

A hydraulic winch emergency system of a rescue boat retracting and releasing device comprises a hydraulic motor, a brake connected with the hydraulic motor, a motor valve group for controlling the hydraulic motor to rotate, a control valve group for conveying hydraulic oil to the motor valve group, a hydraulic pump for inputting the hydraulic oil into the control valve group from an oil tank, and an emergency pump group. An oil inlet of the emergency pump set is connected with the oil tank, and an oil outlet of the emergency pump set is connected with an oil inlet of the control valve set. A stop valve and an emergency reversing valve are arranged between the control valve set and the motor valve set, the stop valve is located between the control valve set and a port A of the motor valve set, and after the stop valve closes an oil way, hydraulic oil going to the port A of the motor valve set enters the motor valve set through the emergency reversing valve. Through the arrangement of the emergency pump set, the stop valve and the emergency reversing valve, efficient and convenient use of the hydraulic winch under the emergency condition is achieved.

Description

Technical Field

[0001] The invention belongs to the field of sea rescue, and in particular relates to a hydraulic winch emergency system for a rescue boat launching and retracting device. Background Art

[0002] A marine rescue boat is a vessel specially designed for rescuing people in emergency situations. They are usually deployed on large ships such as passenger ships, cargo ships and offshore platforms to respond quickly to accidents or emergencies and ensure the safe evacuation of people on board. The design of the rescue boat takes into account factors such as quick start, easy operation and high reliability to adapt to various severe sea conditions.

[0003] In order to ensure that the rescue boat can be put into use in a timely and effective manner, each ship equipped with a rescue boat will be equipped with a corresponding launching and retrieving device. This device is responsible for smoothly placing the rescue boat from the storage position to the water surface, and can also safely retract it to its original position after completing the mission. Traditional rescue boat launching and retrieving systems mainly include various forms such as boom type and slide type, and with the advancement of technology, new design concepts and technical means are constantly introduced to improve their performance.

[0004] A widely used emergency release and recovery mechanism is a hydraulic winch system based on an accumulator and a manual pump. Although this configuration can meet basic needs to a certain extent, it still has obvious defects in actual operation. Since the entire process relies on the operator to provide power through a manual pump, it is difficult to complete effective operation by manpower alone when facing a large workload (for example, more than 30 kilonewtons). Even under lighter load conditions, leakage will inevitably occur between the hydraulic motor and the associated valve components, resulting in a significant decrease in overall work efficiency. In recent years, with the increase in safety requirements and the increasing use of larger capacity rescue boats (such as 45 kilonewton and 60 kilonewton classes), traditional methods have gradually become incapable of meeting the standards specified in current regulations. In an emergency at sea, if the mother ship encounters a power system failure that causes the entire ship to lose power, the traditional rescue boat launch and recovery device that relies on electric or hydraulic drive will face serious operational obstacles. Most modern rescue boat launch and recovery systems rely on electric-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, which will directly result in the rescue boat being unable to be quickly and effectively released to the water or recovered from the water. Summary of the invention

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

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the hydraulic winch emergency system of a rescue boat launching and retracting device of the present invention is as follows:

[0007] A rescue boat launching and retracting device hydraulic winch emergency system comprises a hydraulic motor, a brake connected to the hydraulic motor, a motor valve group for controlling the rotation of the hydraulic motor, a control valve group for conveying hydraulic oil to the motor valve group, a hydraulic pump for conveying 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 to the oil tank, and the oil outlet of the emergency pump is connected to the oil inlet of the control valve group;

[0009] A shut-off valve and an emergency reversing valve are provided between the control valve group and the motor valve group. The shut-off valve is located between the control valve group and port A of the motor valve group. After the shut-off valve closes the oil circuit, the hydraulic oil heading to port A of the motor valve group enters the motor valve group through the emergency reversing valve.

[0010] As a further improvement of the present invention, the motor valve group includes a first balancing valve, a second balancing valve, a shuttle valve, a first pressure reducing valve, a second pressure reducing valve, a hydraulically controlled reversing valve, a throttle valve, a sequence valve, and a check valve; the motor valve group A port is connected to the oil inlet of the first balancing valve, the first balancing valve oil outlet is connected to the hydraulic motor A port, the motor valve group B port is connected to the second balancing valve oil inlet, the second balancing valve oil outlet is connected to the hydraulic motor B port, the oil outlet of the hydraulically controlled reversing valve is respectively connected to the hydraulic motor B port and the throttle valve oil inlet, the throttle valve oil outlet is connected to the hydraulic motor A port, the shuttle valve oil outlet is connected to the second pressure reducing valve oil inlet, the second pressure reducing valve oil outlet is connected to the sequence valve oil inlet, the sequence valve oil outlet is connected to the brake, the first pressure reducing valve oil outlet is connected to the check valve oil inlet, and the check valve oil outlet is connected to the hydraulic motor A port.

[0011] As a further improvement of the present invention, the oil outlet of the emergency reversing valve is connected to the oil inlet of the hydraulically controlled reversing valve. After the hydraulic oil is discharged from the emergency reversing valve, it enters the hydraulically controlled reversing valve to open it. The hydraulic oil passing through the hydraulically controlled reversing valve enters the hydraulic motor through the throttle valve to achieve regulation of the speed of the hydraulic motor.

[0012] As a further improvement of the present invention, the oil outlet of the emergency reversing valve is connected to the oil inlet of the shuttle valve. After the hydraulic oil is discharged from the emergency reversing valve, it passes through the shuttle valve, the second pressure reducing valve and the sequence valve in sequence and enters the brake, so that the brake is disengaged from the hydraulic motor.

[0013] As a further improvement of the present invention, the oil outlet of the emergency reversing valve is connected to the oil inlet of the first pressure reducing valve. After the hydraulic oil is discharged from the emergency reversing valve, it passes through the first pressure reducing valve and the one-way valve in sequence and then enters the hydraulic motor, thereby realizing oil replenishment during the descent of the hydraulic motor.

[0014] As a further improvement of the present invention, the emergency pump group is connected to the oil tank and the oil inlet of the control valve group through a quick connector.

[0015] As a further improvement of the present invention, 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 invention, the brake is a normally closed brake, hydraulic oil enters the brake, and the brake is disengaged from the hydraulic motor.

[0017] As a further improvement of the present invention, 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 invention introduces an emergency pump group as a backup power source, which can quickly take over the work when the main hydraulic pump group fails, ensuring that the rescue boat can be successfully launched and retracted even in an emergency, greatly improving the reliability and safety of the entire system.

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

[0021] Both the proportional reversing valve and the emergency reversing valve are equipped with manual operation functions, allowing operators to flexibly select automatic or manual mode for control according to actual conditions. This not only facilitates daily maintenance, but also enhances the human-computer interaction friendliness when responding to emergencies.

[0022] The brake is designed as a normally closed structure and always remains locked when there is no external command input; it will only be unlocked and allow the hydraulic motor to rotate freely when hydraulic oil with sufficient pressure acts on it, ensuring that accidental sliding accidents can be avoided even under extreme conditions such as power outages.

[0023] By setting up a special first pressure reducing valve-check valve path to achieve effective replenishment of the hydraulic motor during the descent process, the unstable working phenomenon caused by internal leakage and other reasons that may be encountered in traditional systems is solved, and the continuity and stability of equipment operation are further enhanced.

[0024] The emergency pump unit and the oil tank are connected by a quick connector, which facilitates installation and disassembly as well as regular maintenance and replacement of parts. This reduces maintenance costs and shortens the time required for troubleshooting, which is particularly important for marine rescue facilities that need to be used frequently.

[0025] In summary, the new rescue boat launching and retracting device hydraulic winch emergency system proposed in the present invention not only overcomes the shortcomings of the prior art, but also greatly improves the overall performance through a series of innovative designs, meeting the modern maritime safety field's demand for efficient, reliable and easy-to-manage high-end equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a hydraulic winch emergency system of a rescue boat launching and retracting device of the present invention;

[0027] Explanation of the marks in the figure: 10, hydraulic motor; 20, brake; 30, motor valve group; 31, first balancing valve; 32, second balancing valve; 33, shuttle valve; 34, first pressure reducing valve; 35, second pressure reducing valve; 36, hydraulically controlled reversing valve; 37, throttle valve; 38, sequence valve; 39, check valve; 40, control valve group; 41, proportional reversing valve; 50, hydraulic pump; 60, oil tank; 70, emergency pump group; 71, quick connector; 80, stop valve; 90, emergency reversing valve. DETAILED DESCRIPTION

[0028] In order to better understand the purpose, structure and function of the present invention, a hydraulic winch emergency system of a rescue boat launching and retracting device of the present invention is further described in detail below with reference to the accompanying drawings.

[0029] Implementation example:

[0030] like Figure 1 As shown, a rescue boat launching and retracting device hydraulic winch emergency system 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 connected in parallel with the hydraulic pump 50 between the oil tank 60 and the control valve group 40, and a stop valve 80 and an emergency reversing valve 90 arranged between the control valve group 40 and the motor valve group 30. When the hydraulic winch is operating normally, the hydraulic oil is discharged into the control valve group 40 through the hydraulic pump 50, and the hydraulic oil is switched to enter the A / B port of the hydraulic motor 10 through the proportional reversing valve 41 to realize the forward and reverse rotation of the hydraulic motor 10. When the mother ship loses power and the rescue boat needs to be launched and retracted urgently, the emergency pump group 70 is connected through the quick connector 71, the stop 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 reversing valve 90.

[0031] The motor valve group includes a first balancing valve 31 , a second balancing valve 32 , a shuttle valve 33 , a first pressure reducing valve 34 , a second pressure reducing valve 35 , a hydraulically controlled reversing valve 36 , a throttle valve 37 , a sequence valve 38 , and a one-way valve 39 . The A port of the motor valve group is connected to the oil inlet of the first balancing valve 31, the oil outlet of the first balancing valve 31 is connected to the A port of the hydraulic motor, the B port of the motor valve group is connected to the oil inlet of the second balancing valve 32, the oil outlet of the second balancing valve 32 is connected to the B port of the hydraulic motor, the oil outlet of the hydraulically controlled reversing valve 36 is respectively connected to the B port of the hydraulic motor and the oil inlet of the throttle valve 37, the oil outlet of the throttle valve 37 is connected to the A port of the hydraulic motor, the oil outlet of the shuttle valve 33 is connected to the oil inlet of the second pressure reducing valve 35, the oil outlet of the second pressure reducing valve 35 is connected to the oil inlet of the sequence valve 38, the oil outlet of the sequence valve 38 is connected to the brake 20, the oil outlet of the first pressure reducing valve 34 is connected to the oil inlet of the check valve 39, the oil outlet of the check valve 39 is connected to the A port of the hydraulic motor, and the oil outlet of the emergency reversing valve 90 is respectively connected to the oil inlets of the hydraulically controlled reversing valve 36, the shuttle valve 33 and the first pressure reducing valve 34.

[0032] When the emergency pump group 70 is connected, the hydraulic oil output by the emergency pump is used as power to supply oil to the system. When it is necessary to recover the rescue boat, the handle of the proportional reversing valve 41 is switched to the "recovery" position to supply oil to the hydraulic motor through the control valve group 40, and the winch is driven to recover the rescue boat. When it is necessary to release the rescue boat, the emergency pump group 70 is started, and the stop valve 80 is controlled to cut off the oil circuit between the control valve group 40 and the A port of the motor valve group 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 after passing 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; the last path passes through the first pressure reducing valve 34 and the one-way valve 39 to replenish oil to the hydraulic motor A port. At this time, since the brake 20 is already opened, the winch is passively lowered under the gravity of the rescue boat. The lowering speed can be adjusted by limiting the return oil flow of the hydraulic motor 10 by the throttle valve 37. During the lowering process of the hydraulic motor 10, the hydraulic motor 10 is replenished with oil through the first pressure reducing valve 34 to prevent the hydraulic motor 10 from stalling due to air absorption. During the lowering process, if it is necessary to stop in the middle, 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 the requirements of GB / T 11626 "Ships and Offshore Technology - Lifting Lifeboat Launching Devices", the hydraulic power winch of the rescue boat launching device should have the following two capabilities in the emergency state of power failure: 1. The launching device should only rely on gravity or stored mechanical energy that does not rely on the ship's power to launch the boat. 2. The ability to manually recover the fully loaded rescue boat from the water to the boat storage location. In order to meet the above two regulatory requirements, the existing rescue boat launching device usually adopts the method of accumulator and manual pump. The rescue boat launching device pre-charges the accumulator with sufficient pressure. When the mother ship loses power, the hydraulic power winch uses the hydraulic energy stored in the accumulator to open the winch brake through the control valve to lower the rescue boat to the water surface. When it is necessary to lift the rescue boat in the power failure state, the manual pump installed on the pump station is used to power the winch motor to recover the rescue boat from the water surface to the storage location of the mother ship. The biggest disadvantage of the emergency method using accumulators and manual pumps is that the work done by manpower is limited, and the inevitable leakage of winch hydraulic motors and valves leads to low efficiency. For rescue boats with a working load of more than 30KN, the manual pump cannot achieve the recovery function. With the increasing application of large rescue boats such as 45KN and 60KN, the original method can no longer meet the regulatory requirements.

[0034] The system of the present invention can meet the emergency recovery of various large rescue boats by adopting an emergency pump group as an emergency power source, greatly improving the recovery efficiency and solving the problem that a manual pump cannot be used for emergency recovery. Compared with conventional emergency methods, the accumulator is eliminated, and there is no need to charge or release the accumulator, which simplifies the operation process and reduces the operation time. The emergency pump group is roller-movable and connected to the main pump station of the equipment with a quick connector. The two retracting and launching devices on the left and right sides of the mother ship can share a diesel pump group, saving valuable space on the ship and reducing manufacturing costs.

[0035] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A rescue boat launching and retracting device hydraulic winch emergency system, characterized in that: It includes a hydraulic motor, a brake connected to the hydraulic motor, a motor valve group for controlling the rotation of the hydraulic motor, a control valve group for conveying hydraulic oil to the motor valve group, a hydraulic pump for conveying hydraulic oil from an oil tank to the control valve group, and an emergency pump group; The oil inlet of the emergency pump group is connected to the oil tank, and the oil outlet of the emergency pump is connected to the oil inlet of the control valve group; A shut-off valve and an emergency reversing valve are provided between the control valve group and the motor valve group. The shut-off valve is located between the control valve group and port A of the motor valve group. After the shut-off valve closes the oil circuit, the hydraulic oil heading to port A of the motor valve group enters the motor valve group through the emergency reversing valve.

2. The rescue boat launching and retracting device hydraulic winch emergency system according to claim 1, characterized in that: The motor valve group includes a first balancing valve, a second balancing valve, a shuttle valve, a first pressure reducing valve, a second pressure reducing valve, a hydraulically controlled reversing valve, a throttle valve, a sequence valve, and a check valve; The A port of the motor valve group is connected to the oil inlet of the first balancing valve, the oil outlet of the first balancing valve is connected to the A port of the hydraulic motor, the B port of the motor valve group is connected to the oil inlet of the second balancing valve, the oil outlet of the second balancing valve is connected to the B port of the hydraulic motor, the oil outlet of the hydraulically controlled reversing valve is respectively connected to the B port of the hydraulic motor and the oil inlet of the throttle valve, the oil outlet of the throttle valve is connected to the A port of the hydraulic motor, the oil outlet of the shuttle valve is connected to the oil inlet of the second pressure reducing valve, the oil outlet of the second pressure reducing valve is connected to the oil inlet of the sequence valve, the oil outlet of the sequence valve is connected to the brake, the oil outlet of the first pressure reducing valve is connected to the oil inlet of the one-way valve, and the oil outlet of the one-way valve is connected to the A port of the hydraulic motor.

3. The rescue boat launching and retracting device hydraulic winch emergency system according to claim 2, characterized in that: The oil outlet of the emergency reversing valve is connected to the oil inlet of the hydraulically controlled reversing valve. After the hydraulic oil is discharged from the emergency reversing valve, it enters the hydraulically controlled reversing valve to open it. The hydraulic oil passing through the hydraulically controlled reversing valve enters the hydraulic motor through the throttle valve to adjust the speed of the hydraulic motor.

4. The rescue boat launching and retracting device hydraulic winch emergency system according to claim 2, characterized in that: The oil outlet of the emergency reversing valve is connected to the oil inlet of the shuttle valve. After the hydraulic oil is discharged from the emergency reversing valve, it passes through the shuttle valve, the second pressure reducing valve and the sequence valve in sequence and then enters the brake, so that the brake is disengaged from the hydraulic motor.

5. The rescue boat launching and retracting device hydraulic winch emergency system according to claim 2, characterized in that: The oil outlet of the emergency reversing valve is connected to the oil inlet of the first pressure reducing valve. After the hydraulic oil is discharged from the emergency reversing valve, it passes through the first pressure reducing valve and the one-way valve in sequence and then enters the hydraulic motor, thereby realizing oil replenishment during the descent of the hydraulic motor.

6. The rescue boat launching and retracting device hydraulic winch emergency system according to claim 1, characterized in that: The emergency pump group is connected with the oil tank and the oil inlet of the control valve group through a quick connector.

7. The rescue boat launching and retracting device hydraulic winch emergency system according to claim 1, characterized in that: The control valve group controls the hydraulic oil to enter the A port or the B port of the motor valve group through the proportional reversing valve.

8. The rescue boat launching and retracting device hydraulic winch emergency system according to claim 1, characterized in that: The brake is a normally closed brake, hydraulic oil enters the brake, and the brake is disengaged from the hydraulic motor.

9. The rescue boat launching and retracting device hydraulic winch emergency system according to claim 7, characterized in that: The proportional reversing valve and the emergency reversing valve are provided with a manual operation function.

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