Emergency folding and unfolding structure of rescue boat

Abstract

The emergency retracting and releasing structure of the rescue boat 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, safe and efficient retraction and release of the rescue boat are achieved under the condition that a mother boat loses power.

Description

Technical Field

[0001] The utility model belongs to the field of marine lifesaving, and in particular relates to an emergency retractable and deployable structure for a rescue boat. Background Art

[0002] Rescue boats are specially designed for rapid response and maritime rescue missions in emergency situations. They are typically equipped with advanced navigation systems, communications equipment, and life-saving devices, and are capable of conducting search and rescue missions in adverse weather conditions. Rescue boats are widely used in maritime safety, including but not limited to search and rescue of ships and personnel in distress, pollution control operations, and support for Coast Guard and Navy operations.

[0003] To ensure the rescue boat can be deployed quickly and effectively, the ship is equipped with a special rescue boat deployment device. This device mainly consists of two parts: a release mechanism and a recovery system. Its purpose is to ensure that the rescue boat can be smoothly lowered from the mother ship to the water surface and can be safely retrieved to the mother ship after completing its mission.

[0004] In an emergency at sea, if the mother ship experiences a power outage, traditional rescue boat launching and recovery systems that rely on electric or hydraulic drives face significant operational challenges. Most modern rescue boat launching and recovery systems rely on electrically powered winches and hydraulic pumps for lifting and lowering. If the mother ship loses power, these devices will cease to function properly, preventing the rescue boat from being quickly and effectively released to the surface or recovered from the water. While some systems feature manual pumps as a backup, effective manual control is difficult in practice, especially when handling heavy rescue boats (e.g., over 30 kN). Furthermore, manual pumps are often laborious and time-consuming to operate, which is clearly disadvantageous in emergency rescue situations. In an emergency, every second counts. Relying on less efficient manual methods significantly prolongs the rescue boat preparation and deployment process, hindering timely assistance to those in distress. To cope with sudden power outages, additional hand tools and accessories must be kept on board, and regularly inspected to ensure they are in good condition. This not only increases maintenance costs but also places an additional administrative burden on crew members. Utility Model Content

[0005] The utility model aims to provide an emergency retractable structure for a rescue boat, so as to solve the technical problem of efficiently and safely retracting and deploying the rescue boat when the mother ship loses power.

[0006] To achieve the above objectives, the specific technical solutions of the emergency retractable structure of a rescue boat of the present invention are as follows:

[0007] A rescue boat emergency retraction and deployment structure 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 the A port of the motor valve group, and after the shut-off valve closes the oil circuit, the hydraulic oil heading to the A port of the motor valve group enters the motor valve group through the emergency reversing valve; the motor valve group It includes 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 one-way valve; the oil outlet of the emergency reversing valve is respectively connected to the oil inlets of the hydraulically controlled reversing valve, the shuttle valve and the first pressure reducing valve; the hydraulic oil entering the hydraulically controlled reversing valve opens it, and the hydraulic oil discharged from the hydraulically controlled reversing valve enters the hydraulic motor through the throttle valve to adjust the speed of the hydraulic motor; the hydraulic oil discharged from the shuttle valve passes through the second pressure reducing valve and the sequence valve in sequence and enters the brake to disengage the brake from the hydraulic motor; the hydraulic oil discharged from the first pressure reducing valve enters the hydraulic motor through the one-way valve to replenish oil during the descent of the hydraulic motor.

[0008] As a further improvement of the present invention, 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.

[0009] As a further improvement of the present invention, the motor valve group also includes a first balancing valve and a second balancing 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, and the second balancing valve oil outlet is connected to the hydraulic motor B port.

[0010] 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.

[0011] 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.

[0012] As a further improvement of the present invention, the brake is a normally closed brake, and when hydraulic oil enters the brake, the brake is disengaged from the hydraulic motor.

[0013] As a further improvement of the present invention, the proportional reversing valve and the emergency reversing valve are provided with a manual operation function.

[0014] Beneficial effects:

[0015] This utility model provides an emergency rescue boat deployment and retraction structure designed to address existing issues, particularly the inability to effectively operate the rescue boat in the event of a power outage on the mother ship. By incorporating a specific hydraulic system design and an emergency pump unit, the structure not only improves system reliability and safety, but also enhances emergency response capabilities.

[0016] A complex yet highly efficient hydraulic system consisting of hydraulic motors, brakes, and various valves ensures that even in the event of a power outage, the rescue boat can be deployed and retracted normally, either manually or using an emergency pump. The design of the emergency pump unit, in particular, ensures sufficient power support in any situation.

[0017] When no hydraulic fluid enters the system, the brake remains closed, preventing accidental slippage even in the event of a malfunction. The primary and secondary balancing valves ensure pressure balance on both sides of the hydraulic motor, preventing loss of control due to excessive pressure on one side. Multiple pressure reducing and throttle valves precisely regulate hydraulic oil pressure and flow, effectively controlling the motor's speed and avoiding safety hazards associated with excessively high or low operating speeds.

[0018] The manual operation of the proportional reversing valve and the emergency reversing valve provides a means of manual intervention in the event of a failure in the automatic control system, increasing operational flexibility. The use of quick connectors allows the emergency pump unit to be quickly connected to the fuel tank and control valve assembly, simplifying emergency preparation workflows and shortening response time. By integrating multiple components, such as hydraulically controlled reversing valves and shuttle valves, this utility model can accommodate rescue boats of varying specifications and weight classes, including large rescue boats (e.g., 45KN and 60KN), meeting a wider range of maritime rescue needs.

[0019] In summary, this utility model, through its innovative hydraulic system design, significantly improves the efficiency, safety, and reliability of the rescue boat emergency launch and retraction mechanism, providing a more robust technical foundation for maritime rescue operations. In particular, the utility model demonstrates exceptional adaptability and stability in the face of sudden power outages or other extreme conditions, significantly contributing to the overall improvement of maritime rescue operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the emergency retractable structure of a rescue boat of the present invention;

[0021] 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. Hydraulic-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

[0022] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0023] Implementation example:

[0024] like Figure 1 The figure shows a rescue boat emergency deployment and retraction structure, comprising a hydraulic motor 10 for controlling the rotation of a hydraulic winch, a brake 20, a motor valve assembly 30 for controlling the rotation of the hydraulic motor 10, a control valve assembly 40, a hydraulic pump 50, an oil tank 60, an emergency pump assembly 70 connected in parallel with the hydraulic pump 50 between the oil tank 60 and the control valve assembly 40, and a shutoff valve 80 and an emergency reversing valve 90 disposed between the control valve assembly 40 and the motor valve assembly 30. During normal operation of the hydraulic winch, hydraulic oil is discharged from the hydraulic pump 50 into the control valve assembly 40. The proportional reversing valve 41 switches the hydraulic oil into ports A and B of the hydraulic motor 10, enabling forward and reverse rotation of the hydraulic motor 10. When power is lost from the mother ship and the rescue boat needs to be deployed and retracted, the emergency pump assembly 70 is connected via a quick connector 71. The shutoff valve 80 cuts off the oil flow between the control valve assembly and port A of the hydraulic motor, allowing the hydraulic oil to enter the motor valve assembly 30 through the emergency reversing valve 90.

[0025] 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 . Among them, the port A 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 port A of the hydraulic motor, the port B 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 port B of the hydraulic motor, the oil outlet of the hydraulically controlled reversing valve 36 is respectively connected to the port B 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 port A of the hydraulic motor, the oil outlet of the shuttle valve 33 is connected to the oil inlet of the second reducing valve 35, the oil outlet of the second 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 reducing valve 34 is connected to the oil inlet of the one-way valve 39, the oil outlet of the one-way valve 39 is connected to the port A 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 reducing valve 34.

[0026] 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, driving the winch to recover the rescue boat. When it is necessary to release the rescue boat, the emergency pump group 70 is started, and the shut-off valve 80 is controlled to cut off the oil circuit between the control valve group 40 and the motor valve group A port 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 passes through the emergency reversing valve 90 and enters the motor valve group 30. Hydraulic oil entering the motor valve block 30 through the emergency reversing valve 90 is divided into three paths. One path opens the hydraulically controlled reversing valve 36; another path passes through the shuttle valve 33, the second pressure-reducing valve 35, and the sequence valve 38, then activates the brake 20, disengaging the brake 20 from the hydraulic motor 10; and the final path passes through the first pressure-reducing valve 34 and the check valve 39 to replenish oil to port A of the hydraulic motor. At this point, since the brake 20 is already engaged, the winch is passively lowered under the weight of the rescue boat. The lowering speed can be adjusted by limiting the return oil flow from the hydraulic motor 10 using the throttle valve 37. During the lowering process, oil is replenished to the hydraulic motor 10 through the first pressure-reducing valve 34 to prevent it from stalling due to air intake. If a stop is required during the lowering process, the emergency reversing valve 90 is reset by its spring, the emergency pump group stops supplying oil to the motor valve block 30, the brake 20 applies pressure to the hydraulic motor 10, and the hydraulic winch stops.

[0027] According to GB / T 11626, "Ships and Offshore Technology - Docked Lifeboat Launching Devices," the hydraulic winch of a rescue boat launching device must possess the following two capabilities in the event of a power outage: 1. The device must be able to lower the lifeboat solely by gravity or stored mechanical energy independent of the ship's power. 2. The device must be able to manually recover a fully loaded lifeboat from the water to its stowage location. To meet these two regulatory requirements, existing rescue boat launching devices typically utilize an accumulator and a manual pump. The accumulator is pre-charged with sufficient pressure. When the mother ship loses power, the hydraulic winch utilizes the stored hydraulic energy in the accumulator to open the winch brake via a control valve, lowering the rescue boat to the surface. When the rescue boat needs to be raised in the event of a power outage, a manual pump installed on the pump station powers the winch motor, recovering the rescue boat from the water and returning it to its stowage location on the mother ship. The biggest drawback of the emergency response method using accumulators and manual pumps is the limited human effort and the inevitable leakage from the winch hydraulic motor and valves, resulting in low efficiency. For rescue boats with a workload of 30 kN or more, manual pumps are incapable of recovery. With the increasing use of larger rescue boats, such as those with a workload of 45 kN and 60 kN, this existing approach no longer meets regulatory requirements.

[0028] The structure of this utility model utilizes an emergency pump unit as an emergency power source, meeting the emergency recovery requirements of various large rescue boats. This significantly improves recovery efficiency and resolves the issue of manual pumps being unable to perform emergency recovery. Compared to conventional emergency methods, the accumulator is eliminated, eliminating the need for charging or depressurizing the accumulator, simplifying the operation process and reducing operation time. The emergency pump unit is roller-movable and connected to the main pump station of the equipment using a quick connector. The two retraction and deployment devices on the port and starboard sides of the mother ship can share a single diesel pump unit, saving valuable space on board and reducing manufacturing costs.

[0029] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate 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. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A rescue boat emergency retraction and deployment structure, 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 delivering hydraulic oil to the motor valve group, a hydraulic pump for delivering 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 for port A of the motor valve group enters the motor valve group through the emergency reversing valve. The motor valve group includes 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 one-way valve; The oil outlet of the emergency reversing valve is respectively connected to the oil inlets of the hydraulically controlled reversing valve, the shuttle valve and the first pressure reducing valve; The hydraulic oil entering the hydraulically controlled reversing valve opens it, and the hydraulic oil discharged from the hydraulically controlled reversing valve enters the hydraulic motor through the throttle valve to adjust the speed of the hydraulic motor; The hydraulic oil discharged from the shuttle valve passes through the second pressure reducing valve and the sequence valve in sequence and then enters the brake, thereby disengaging the brake from the hydraulic motor; The hydraulic oil discharged from the first pressure reducing valve enters the hydraulic motor after passing through the one-way valve, thereby achieving oil replenishment during the descending process of the hydraulic motor.

2. The rescue boat emergency retraction and deployment structure according to claim 1, characterized in that: 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 emergency retractable structure for a rescue boat according to claim 2, characterized in that: The motor valve group also includes a first balancing valve and a second balancing 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, and the second balancing valve oil outlet is connected to the hydraulic motor B port.

4. The emergency retractable structure for a rescue boat according to claim 1, characterized in that: The emergency pump group is connected to the oil tank and the oil inlet of the control valve group through a quick connector.

5. The emergency retractable structure for a rescue boat 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.

6. The emergency retractable structure for a rescue boat according to claim 1, characterized in that: The brake is a normally closed brake. When hydraulic oil enters the brake, the brake is disengaged from the hydraulic motor.

7. The emergency retractable structure for a rescue boat according to claim 5, characterized in that: The proportional reversing valve and the emergency reversing valve are provided with a manual operation function.

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