Multipurpose rescue boat telescopic hoisting crane and control method thereof

Abstract

The invention relates to the technical field of hoisting cranes, in particular to a multipurpose rescue boat telescopic hoisting crane and a control method thereof.The multipurpose rescue boat telescopic hoisting crane comprises a base and is characterized in that a hydraulic pump station is arranged on one side of the base, a slewing bearing is arranged in the center of the top of the base, and an oilless bearing is arranged in the slewing bearing; the top of the rotary bearing is provided with a central rotary joint, the central rotary joint is provided with a rotary speed reducer assembly, and the other side of the rotary speed reducer assembly is provided with an energy storage component. Through the design of the telescopic boom structure and the hydraulic winch, the telescopic boom can adapt to various scenes such as sea rescue and oil field operation, and the functions are more comprehensive; a hydraulic driving and slewing bearing structure is adopted, 360-degree slewing and variable amplitude operation of the hoisting crane is achieved, and the flexibility and accuracy of operation are improved; and an emergency rotation pull rod, an emergency lowering pull rod and an emergency hand pump are arranged, so that manual operation can still be performed when a hydraulic system fails, and the safety and reliability of the equipment are improved.

Description

Technical Field

[0001] The invention relates to the technical field of lifting cranes, and in particular to a telescopic lifting crane for a multi-purpose rescue boat and a control method thereof. Background Art

[0002] Traditional cranes have many problems in practical applications and are difficult to meet the diverse needs in complex scenarios. First, they have a single function and are usually only suitable for specific tasks, and cannot meet the multi-purpose needs of lifting, rescue and material transportation at the same time. Secondly, the operation is complicated and the flexibility is insufficient. The coordination between the hydraulic system and the mechanical structure is poor. The rotation and amplitude adjustment accuracy is limited, and it is difficult to accurately position in narrow or complex environments. In addition, the emergency response capability is weak, and there is a lack of effective emergency operation means. There are major safety hazards when the hydraulic system fails. At the same time, traditional equipment has high maintenance costs and high failure rates. The bearings and hydraulic systems require frequent lubrication and cleaning, and hydraulic oil pollution and mechanical wear lead to poor equipment stability. Finally, traditional cranes are large in size and weight, making it difficult to flexibly deploy in limited spaces, especially in special scenarios such as offshore rescue boats. Therefore, there is an urgent need for a crane that is multi-purpose, flexible in operation, strong in emergency response capabilities, convenient in maintenance and compact in structure to solve the above problems.

[0003] A Chinese patent discloses a lifting and laying crane, Publication No.: (CN 104724256 A) including a track, a base, a bracket and a boom mechanism. The base is connected to the track through a roller mechanism, the bracket is arranged on the base, and the boom mechanism is movably hinged on the bracket. The boom mechanism includes a main arm, a boom and a mechanical arm. One end of the main arm is movably hinged to the bracket, and the other end is coaxially hinged to the boom and the mechanical arm; the main arm and the base are movably hinged to the main arm hydraulic cylinder, the main arm and the boom are movably hinged to the boom hydraulic cylinder, and the main arm and the mechanical arm are movably hinged to the mechanical arm hydraulic cylinder. The boom and the mechanical arm are connected to the main arm, and the mechanical arm includes a manipulator and a wire rope hook. However, this type of lifting crane has a single function and is usually only suitable for specific tasks, and cannot meet the multi-purpose requirements of lifting, rescue and material transportation at the same time. Secondly, the operation is complicated and the flexibility is insufficient. The coordination between the hydraulic system and the mechanical structure is poor, and the rotation and amplitude change accuracy is limited, making it difficult to accurately position in narrow or complex environments. In addition, the emergency response capability is weak and there is a lack of effective emergency operation means, which poses a great safety hazard when the hydraulic system fails. At the same time, traditional equipment has high maintenance costs and high failure rates. The bearings and hydraulic systems require frequent lubrication and cleaning. Hydraulic oil contamination and mechanical wear lead to poor equipment stability. Finally, traditional cranes are large in size and weight, making it difficult to flexibly deploy in limited spaces, especially in special scenarios such as offshore rescue boats. Therefore, a multi-purpose rescue boat telescopic crane and its control method are needed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the lifting crane has a single function and is usually only suitable for specific tasks, and cannot meet the multi-purpose needs such as lifting, rescue and material transportation at the same time. Secondly, the operation is complicated and the flexibility is insufficient. The coordination between the hydraulic system and the mechanical structure is poor. The rotation and amplitude change accuracy is limited, and it is difficult to accurately position in a narrow or complex environment. In addition, the emergency response capability is weak, and there is a lack of effective emergency operation means. There are major safety hazards when the hydraulic system fails. At the same time, traditional equipment has high maintenance costs and high failure rates. The bearings and hydraulic systems require frequent lubrication and cleaning. Hydraulic oil pollution and mechanical wear lead to poor equipment stability. Finally, the traditional lifting crane is large in size and weight, and it is difficult to flexibly deploy in a limited space. Especially in special scenarios such as offshore rescue boats, the application is limited. A multi-purpose rescue boat telescopic lifting crane and its control method, as well as its manufacturing method and use method are proposed.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a multi-purpose rescue boat telescopic crane, including a base, characterized in that: a hydraulic pump station is provided on one side of the base, a slewing bearing is provided at the top center of the base, an oil-free bearing is provided in the slewing bearing, a central slewing joint is provided on the top of the slewing bearing, a slewing reducer assembly is installed on the central slewing joint, an energy storage component is provided on the other side of the slewing reducer assembly, a tower is provided at the top center of the slewing bearing, a cover plate is provided on the top of the tower, and a straight-through pressure injection oil cup is provided on one side of the cover plate A first pulley is provided on one side of the straight-through pressure injection oil cup, a main shaft is provided at the connection between the cover plate and the tower, a first V-shaped stopper is provided on the main shaft, a card plate is provided on the top of the cover plate, a telescopic oil cylinder is provided in the card plate, a plate-type one-way balancing valve is provided on one side of the telescopic oil cylinder, a rescue boat winch is provided on one side of the tower, and the maximum allowable working angle of the rescue boat winch is ≤20°, a telescopic mechanism assembly is installed on the top of the tower, a hydraulic winch is provided on the top of the telescopic mechanism assembly, a second pulley is provided on the hydraulic winch, and the telescopic mechanism assembly includes a telescopic arm and a basic arm. Multifunctional integration: Through hydraulic drive, slewing bearing, telescopic arm and winch system, it can realize multi-purpose functions such as lifting, rescue, and material transportation; Compact structure: The base, tower and telescopic mechanism assembly are highly integrated, suitable for deployment in limited spaces, especially suitable for offshore rescue boats; Flexible operation: The slewing bearing and telescopic arm cooperate to achieve 360° rotation and multi-angle amplitude change, improving the operating range and accuracy; Safe and reliable: The maximum allowable angle of the rescue boat winch is ≤20°, which prevents the rescue boat from swinging and ensures safe operation.

[0006] Preferably, the energy storage assembly includes an AB-type accumulator, an accumulator clamp is provided on the AB-type accumulator, and a right amplitude plate is connected to one end of the top of the AB-type accumulator. Buffering and voltage stabilization: the AB-type accumulator absorbs hydraulic shock, compensates for instantaneous flow demand, and reduces the peak power consumption of the motor; stable structure: the accumulator clamp ensures that the AB-type accumulator is firmly fixed, and the right amplitude plate enhances the stability of the amplitude operation.

[0007] Preferably, a variable-length oil cylinder is provided on one side of the top of the slewing bearing, a manual valve is provided on one side of the variable-length oil cylinder, a solenoid valve is provided on one side of the manual valve, a first connecting piece is provided on one end of the variable-length oil cylinder, and a second connecting piece is provided on the other end, one end of the first connecting piece is associated with the slewing bearing, one end of the second connecting piece is associated with the basic arm, a first oil cylinder pin is provided on the first connecting piece, and a second oil cylinder pin is provided on the second connecting piece. The variable-length oil cylinder drives the basic arm to adjust the elevation angle (range -5° to 75°), with a positioning accuracy of ±0.5°; the first oil cylinder pin and the second oil cylinder pin ensure the stability of the connecting piece and reduce mechanical wear.

[0008] Preferably, a valve group No. 1 is provided on one side of the slewing reducer assembly, a valve group No. 2 is provided on one side of the tower, and a sealing plate is provided on the valve group No. 2. The valve group No. 1 and the valve group No. 2 control the slewing and telescopic / amplitude-changing actions respectively, which reduces the complexity of the system and facilitates troubleshooting; the sealing plate protects the valve group No. 2 to prevent the influence of the external environment.

[0009] Preferably, an oilfield hook is provided below the front end of the telescopic arm, an emergency slewing rod is provided on one side of the oilfield hook, and an emergency lowering rod is provided on one side of the emergency slewing rod. The oilfield hook is suitable for lifting heavy equipment, which expands the application scenarios of the equipment; the emergency slewing rod and the emergency lowering rod provide manual operation functions when the hydraulic system fails, thereby improving the reliability of the equipment.

[0010] Preferably, the diameter of the slewing bearing is φ1130mm, a left amplitude plate is provided on one side of the top of the slewing bearing, a mounting plate is provided on one side of the left amplitude plate, a seismic pressure gauge is provided on the top of the mounting plate, and a quadruple valve is provided on one side of the mounting plate. The static load capacity of the φ1130mm slewing bearing is 500kN·m, which meets the requirements of heavy lifting; the seismic pressure gauge displays the system pressure in real time, and the quadruple valve integrates a pressure compensator to ensure that the synchronous action error of multiple actuators is ≤3%.

[0011] Preferably, the hydraulic pump station includes an oil tank, characterized in that: an electric motor is provided on the top of the oil tank, a lifting ring is provided on the top of the electric motor, an overflow valve is provided on one side of the electric motor, an oil pump is provided on one end of the overflow valve, a hydraulic pump manual flow regulating valve is provided on one side of the overflow valve and cooperates with the overflow valve, an oil return filter is provided on one side of the overflow valve, an oil outlet of the hydraulic pump is provided on one end of the return oil filter, and an oil return interface is provided on the other end, a temperature sensor is provided on one side of the electric motor, a temperature-type liquid level gauge is provided below the temperature controller, an air filter is provided on one side of the top of the oil tank, a liquid level controller is provided on one side of the air filter, and an oil drain interface is provided on one side of the liquid level controller. The overflow valve and the manual flow regulating valve of the hydraulic pump ensure the stability of the system pressure and flow, and the oil return filter keeps the oil clean; the temperature sensor and the temperature-type liquid level gauge monitor the oil temperature and liquid level in real time and trigger alarm protection; the oil drain interface is connected to the waste oil recovery device to reduce environmental pollution.

[0012] Preferably, a cleaning cover is provided at the front end of the oil tank, and an emergency hand pump is provided at one side of the oil tank. The cleaning cover facilitates cleaning the inside of the oil tank and reduces maintenance workload, and the emergency hand pump provides manual power when the hydraulic system fails to ensure normal operation of the equipment.

[0013] Preferably, a guide wheel is provided on the top of the telescopic arm, and a guide wheel pin is provided on the guide wheel. The guide wheel is fixed by the guide wheel pin to ensure the directional movement of the wire rope and reduce wear. The surface of the guide wheel pin is hard chrome plated to enhance wear resistance and service life.

[0014] Preferably,

[0015] (1) Oil circulation and pressure control:

[0016] After the motor is started, the oil pump draws hydraulic oil from the oil tank and delivers it to the actuator through the hydraulic pump outlet. The overflow valve adopts a pilot pressure feedback structure to dynamically adjust the system pressure (range: 0-25MPa) to prevent overload. The hydraulic pump manual flow control valve adjusts the flow rate (accuracy ±2%) through the throttle opening to match different working conditions. The return oil filter is equipped with a high-efficiency filter element with β≥200 to intercept particles with a particle size of ≥10μm to ensure the oil cleanliness NAS 8 level.

[0017] (2) Accumulator pre-charging and voltage stabilization:

[0018] The AB type accumulator (volume 10L, nitrogen filling pressure 12MPa) is fixed by the accumulator clamp and pre-pressurized when the system starts to absorb hydraulic shock and compensate for instantaneous flow demand, reducing the peak power consumption of the motor;

[0019] (3) Condition monitoring and safety interlocking

[0020] The temperature-type liquid level gauge (accuracy ±1.5%) monitors the tank liquid level in real time and triggers the liquid level controller alarm (shutdown protection when the liquid level is <20%). The temperature sensor is linked to the motor thermal protection module, and forced cooling is started when the oil temperature is >60°C. The seismic-resistant pressure gauge (range 0-40MPa, seismic grade VH4) displays the pressure of key nodes. The four-valve group integrates a pressure compensator to ensure that the synchronous action error of multiple actuators is ≤3%;

[0021] (4) Rotation positioning and amplitude adjustment

[0022] The slewing bearing supports the tower frame through an oil-free bearing with a friction coefficient of ≤0.08, achieving low-resistance 360° continuous rotation. The slewing reducer assembly (speed ratio 120:1) is controlled by valve group No. 1, with an output torque of 12kN·m. It cooperates with the central slewing joint (pressure resistance 35MPa, leakage <5 drops / min) to achieve rotation without pipeline interference. The luffing cylinder is hinged to the left / right luffing plate through the first cylinder pin (hardness HRC45) and the second cylinder pin, driving the basic arm elevation range of -5° to 75°, with a positioning accuracy of ±0.5°;

[0023] (5) Dynamic control of telescopic boom

[0024] The telescopic cylinder pushes the telescopic arm out from the basic arm, with a maximum stroke of 8m. The plate-type one-way balancing valve (response time <50ms) creates back pressure when the cylinder retracts to prevent the load from stalling. The guide wheel guides the directional movement of the wire rope through the guide wheel pin. The hydraulic winch (drum capacity 200m, line speed 0-15m / min) is equipped with a second pulley block. The rescue boat winch (special working angle ≤20°) is equipped with an angle sensor, which automatically cuts off the power when the limit is exceeded.

[0025] (6) Emergency Redundancy Operation Mode

[0026] The emergency hand pump switches the oil circuit through the bypass valve. The system pressure can reach 8MPa during manual operation, meeting the basic lifting requirements. The emergency slewing lever can drive the tower to slew when the human input torque is 150N·m; the emergency lowering lever controls the hydraulic winch to slowly descend (speed ≤2m / min).

[0027] (7) Lubrication and wear control

[0028] The straight-through pressure oiling cup (grease injection pressure 10MPa) injects lithium-based grease (NLGI grade 2) into the oil-free bearing every 50 hours to form a boundary lubrication film. The air filter (filtration accuracy 5μm) maintains a slight positive pressure in the oil tank (0.02-0.05MPa) to prevent the intrusion of pollutants. The clearance between the first V-shaped stopper (material 40Cr, quenching hardness HRC50) and the main shaft is ≤0.1mm to limit the radial movement of the tower. The clamping plate fixes the telescopic cylinder base through the bolt preload (torque 120N·m), and the cleaning cover (quick-opening sealing structure) cleans the sediment at the bottom of the oil tank every 500 hours. The oil drain interface (ball valve control) is connected to the waste oil recovery device to achieve environmentally friendly discharge.

[0029] The present invention is beneficial in that:

[0030] The present application can adapt to various scenarios such as maritime rescue and oilfield operations through the retractable boom structure and hydraulic winch design, and has more comprehensive functions; the hydraulic drive and slewing bearing structure are adopted to realize the 360° rotation and amplitude adjustment operation of the crane, which improves the flexibility and accuracy of the operation; emergency slewing rods, emergency lowering rods and emergency hand pumps are provided to ensure manual operation when the hydraulic system fails, thereby improving the safety and reliability of the equipment; the oil-free bearing and straight-through pressure-injected oil cup design are adopted to reduce maintenance costs and extend the service life of the equipment; the size and weight of the equipment are reduced through optimized design, which is convenient for deployment in limited spaces, and is particularly suitable for scenarios such as maritime rescue boats; the hydraulic pump station is equipped with overflow valves, return oil filters, temperature sensors and other components to ensure stable operation of the hydraulic system and reduce the failure rate; through AB type accumulators, it can provide backup power in emergency situations, further enhancing the reliability of the equipment; monitoring devices such as seismic-resistant pressure gauges and temperature-type liquid level gauges are provided to monitor the operating status of the equipment in real time, which is convenient for timely maintenance and troubleshooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0032] See also Figure 1-10 As shown:

[0033] Figure 1 It is a schematic diagram of the general assembly structure of the present invention;

[0034] Figure 2 It is a schematic diagram of the general assembly structure viewed from above of the present invention.

[0035] Figure 3It is a schematic diagram of the general assembly structure of the present invention from the right side.

[0036] Figure 4 For the present invention Figure 1 Sectional view of AA.

[0037] Figure 5 It is a schematic diagram of the structure of the telescopic mechanism assembly of the present invention.

[0038] Figure 6 This is a schematic diagram of the main structure of the hydraulic pump station of the present invention.

[0039] Figure 7 It is a schematic diagram of the top view of the structure of the hydraulic pump station of the present invention.

[0040] Figure 8 It is a right view structural schematic diagram of the hydraulic pump station of the present invention.

[0041] Fig. 9 It is a schematic diagram of the general assembly lifting structure of the present invention.

[0042] Fig.10 The present invention is a hydraulic principle diagram of the telescopic crane that also serves as a rescue boat crane.

[0043] In the figure: 1. Plate-type one-way balancing valve; 2. Four-way valve; 3. First connecting piece; 4. Second connecting piece; 5. Telescopic mechanism assembly; 6. Tower; 7. Luffing cylinder; 8. Main shaft; 9. First cylinder pin; 10. Second cylinder pin; 11. Basic arm; 12. Guide wheel; 13. Guide wheel pin; 14. Base; 15. Telescopic arm; 16. Clamp; 17. Slewing bearing; 18. Right luffing plate; 19. Left luffing plate; 20. Oil-free bearing; 21. First pulley; 25. Mounting plate; 26. Earthquake-resistant pressure gauge; 27. Slewing reducer assembly; 28. Central slewing joint; 29. ​​Oilfield hook; 30. Telescopic cylinder; 31. Cover plate; 32. Rescue boat winch; 33. Straight-through pressure-injection oil cup; 34. Second pulley; 35. AB type accumulator; 36. Accumulator clamp; 37. Hydraulic winch; 38. No. 1 valve group; 39. Sealing plate; 40. No. 2 valve group; 41. Cleaning cover; 42. Oil tank; 45. Temperature-type liquid level gauge; 46. Temperature controller; 47. Electric motor; 48. Lifting ring; 49. Manual flow regulating valve of hydraulic pump; 50. Emergency hand pump; 51. Oil drain interface; 52. Liquid level controller; 53. Air filter; 54. Oil return interface; 55. Hydraulic pump oil outlet; 56. Overflow valve; 57. Oil pump; 57. Hydraulic pump station; 58. Emergency rotary pull rod; 59. Emergency lowering pull rod; 60. Solenoid valve; 61. Manual valve. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Example

[0046] See also Figure 1-10 As shown:

[0047] A multi-purpose rescue boat telescopic crane, comprising a base 14, characterized in that: a hydraulic pump station 57 is provided on one side of the base 14, a slewing bearing 17 is provided at the top center of the base 14, an oil-free bearing 20 is provided in the slewing bearing 17, a central slewing joint 28 is provided at the top of the slewing bearing, a slewing reducer assembly 27 is installed on the central slewing joint 28, an energy storage component is provided on the other side of the slewing reducer assembly 27, a tower 6 is provided at the top center of the slewing bearing 17, a cover plate 31 is provided at the top of the tower 6, a straight-through pressure injection oil cup 33 is provided on one side of the cover plate 31, and one side of the straight-through pressure injection oil cup 33 A first pulley 21 is provided, a main shaft 8 is provided at the connection between the cover plate 31 and the tower 6, a first V-shaped stopper is provided on the main shaft 8, a clamping plate 16 is provided on the top of the cover plate 31, a telescopic cylinder 30 is provided in the clamping plate 16, a plate-type one-way balancing valve 1 is provided on one side of the telescopic cylinder 30, a rescue boat winch 32 is provided on one side of the tower 6, the maximum allowable working angle of the rescue boat winch 32 is ≤20°, a telescopic mechanism assembly 5 is installed on the top of the tower 6, a hydraulic winch 37 is provided on the top of the telescopic mechanism assembly 5, a second pulley 34 is provided on the hydraulic winch 37, and the telescopic mechanism assembly 5 includes a telescopic arm 15 and a basic arm 11. Multifunctional integration: through hydraulic drive, slewing bearing 17, telescopic arm 15 and winch system, multi-purpose functions such as lifting, rescue and material transportation are realized; compact structure: the base 14, tower 6 and telescopic mechanism assembly 5 are highly integrated, suitable for deployment in limited space, especially suitable for offshore rescue boats; flexible operation: the slewing bearing 17 cooperates with the telescopic arm 15 to realize 360° rotation and multi-angle amplitude change, improving the operating range and accuracy; safe and reliable: the maximum allowable angle of the rescue boat winch 32 is ≤20°, which prevents the rescue boat from swinging and ensures safe operation.

[0048] In this embodiment, the energy storage assembly includes an AB type accumulator 35, an accumulator clamp 36 is provided on the AB type accumulator 35, and one end of the top of the AB type accumulator 35 is connected to the right amplitude changing plate 18. Buffering and voltage stabilization: The AB type accumulator 35 absorbs hydraulic shock, compensates for instantaneous flow demand, and reduces the peak power consumption of the motor 47; Stable structure: The accumulator clamp 36 ensures that the AB type accumulator 35 is firmly fixed, and the right amplitude changing plate 18 enhances the stability of the amplitude changing operation.

[0049] In this embodiment, a variable-length oil cylinder 7 is provided on one side of the top of the slewing bearing, a manual valve 61 is provided on one side of the variable-length oil cylinder 7, and a solenoid valve 60 is provided on one side of the manual valve 61. A first connecting member 3 is provided on one end of the variable-length oil cylinder 7, and a second connecting member 4 is provided on the other end. One end of the first connecting member 3 is associated with the slewing bearing 17, and one end of the second connecting member 4 is associated with the basic arm 11. A first oil cylinder pin 9 is provided on the first connecting member 3, and a second oil cylinder pin 10 is provided on the second connecting member 4. The variable-length oil cylinder 7 drives the basic arm 11 to adjust the elevation angle (range -5° to 75°), and the positioning accuracy is ±0.5°; the first oil cylinder pin 9 and the second oil cylinder pin 10 ensure that the connecting member is stable and reduce mechanical wear.

[0050] In this embodiment, a valve group No. 1 38 is provided on one side of the slewing reducer assembly 27, a valve group No. 2 40 is provided on one side of the tower 6, and a sealing plate 39 is provided on the valve group No. 2 40. The valve group No. 1 38 and the valve group No. 2 40 respectively control the slewing and telescopic / amplitude-changing actions, thereby reducing the complexity of the system and facilitating troubleshooting; the sealing plate 39 protects the valve group No. 2 40 to prevent the influence of the external environment.

[0051] In this embodiment, an oilfield hook 29 is provided below the front end of the telescopic arm 15, an emergency slewing rod 58 is provided on one side of the oilfield hook 29, and an emergency lowering rod 59 is provided on one side of the emergency slewing rod 58. The oilfield hook 29 is suitable for lifting heavy equipment, which expands the application scenarios of the equipment; the emergency slewing rod 58 and the emergency lowering rod 59 provide manual operation functions when the hydraulic system fails, thereby improving the reliability of the equipment.

[0052] In this embodiment, the diameter of the slewing bearing 17 is φ1130 mm, a left amplitude plate 19 is provided on one side of the top of the slewing bearing 17, a mounting plate 25 is provided on one side of the left amplitude plate 19, a seismic pressure gauge 26 is provided on the top of the mounting plate 25, and a quadruple valve 2 is provided on one side of the mounting plate 25. The static load capacity of the φ1130 mm slewing bearing 17 is 500 kN·m, which meets the requirements of heavy lifting; the seismic pressure gauge 26 displays the system pressure in real time, and the quadruple valve 2 integrates a pressure compensator to ensure that the synchronous action error of multiple actuators is ≤3%.

[0053] In this embodiment, the hydraulic pump station 57 includes an oil tank 42, which is characterized in that: an electric motor 47 is provided on the top of the oil tank 42, a lifting ring 48 is provided on the top of the electric motor 47, an overflow valve 56 is provided on one side of the electric motor 47, an oil pump 57 is provided on one end of the overflow valve 56, a hydraulic pump manual flow regulating valve 49 is provided on one side of the overflow valve 56 and cooperates with the overflow valve 56, an oil return filter is provided on one side of the overflow valve 56, a hydraulic pump oil outlet 55 is provided on one end of the return oil filter, and an oil return interface 54 is provided on the other end, a temperature sensor is provided on one side of the electric motor 47, a temperature type liquid level gauge 45 is provided below the temperature controller 46, an air filter 53 is provided on one side of the top of the oil tank 42, a liquid level controller 52 is provided on one side of the air filter 53, and an oil drain interface 51 is provided on one side of the liquid level controller 52. The overflow valve 56 and the manual flow regulating valve 49 of the hydraulic pump ensure the stability of the system pressure and flow, and the return oil filter keeps the oil clean; the temperature sensor and the temperature level gauge 45 monitor the oil temperature and liquid level in real time and trigger the alarm protection; the oil drain interface 51 is connected to the waste oil recovery device to reduce environmental pollution.

[0054] Motor 47 model: Y180M-4-H, power: 18.5kW, speed: 1470rpm, power system: 380V / 50Hz, protection level: IP56; oil pump 57 model: HY25, displacement: 25ml / r, rated speed: 1500rpm, rated pressure: 31.5MPa; oil tank 42 capacity: 200; hydraulic oil: L-HM46.

[0055] In this embodiment, a cleaning cover 41 is provided at the front end of the oil tank 42, and an emergency hand pump 50 is provided at one side of the oil tank 42. The cleaning cover 41 facilitates cleaning the inside of the oil tank 42, reducing maintenance workload, and the emergency hand pump 50 provides manual power when the hydraulic system fails to ensure normal operation of the equipment.

[0056] In this embodiment, a guide wheel 12 is provided on the top of the telescopic arm 15, and a guide wheel pin 13 is provided on the guide wheel 12. The guide wheel 12 is fixed by the guide wheel pin 13 to ensure the directional movement of the wire rope and reduce wear. The surface of the guide wheel pin 13 is hard chrome plated to enhance wear resistance and service life.

[0057] In this embodiment,

[0058] (1) Oil circulation and pressure control:

[0059] After the motor 47 is started, the oil pump 57 draws hydraulic oil from the oil tank 42 and delivers it to the actuator through the hydraulic pump oil outlet 55; the relief valve 56 adopts a pilot pressure feedback structure to dynamically adjust the system pressure (range: 0-25MPa) to prevent overload; the hydraulic pump manual flow control valve 49 adjusts the flow rate (accuracy ±2%) through the throttle opening to match different working conditions; the return oil filter is equipped with a high-efficiency filter element with β≥200 to intercept particles with a particle size of ≥10μm to ensure the oil cleanliness NAS 8 level;

[0060] (2) Accumulator pre-charging and voltage stabilization:

[0061] The AB type accumulator 35 (volume 10L, nitrogen filling pressure 12MPa) is fixed by the accumulator clamp 36 and pre-pressurized when the system is started to absorb hydraulic shock and compensate for instantaneous flow demand, thereby reducing the peak power consumption of the motor 47;

[0062] (3) Condition monitoring and safety interlocking

[0063] The temperature-type liquid level gauge 45 (accuracy ±1.5%) monitors the liquid level of the oil tank 42 in real time, triggers the alarm of the liquid level controller 52 (stop protection when the liquid level is <20%), the temperature sensor is linked with the thermal protection module of the motor 47, and forced cooling is started when the oil temperature is >60°C. The seismic pressure gauge 26 (range 0-40MPa, seismic grade VH4) displays the pressure of key nodes, and the two sets of integrated pressure compensators of the quadruple valve ensure that the synchronous action error of multiple actuators is ≤3%;

[0064] (4) Rotation positioning and amplitude adjustment

[0065] The slewing bearing 17 supports the tower 6 through the oil-free bearing 20, with a friction coefficient of ≤0.08, and realizes low-resistance 360° continuous rotation. The slewing reducer assembly 27 (speed ratio 120:1) is controlled by the No. 1 valve group 38, with an output torque of 12kN·m, and cooperates with the central slewing joint 28 (pressure resistance 35MPa, leakage <5 drops / min) to realize rotation without pipeline interference. The variable amplitude cylinder 7 is hinged with the left / right variable amplitude plate 18 through the first cylinder pin 9 (hardness HRC45) and the second cylinder pin 10, driving the basic arm 11 with an elevation range of -5° to 75°, and a positioning accuracy of ±0.5°;

[0066] (5) Dynamic control of 15 telescopic arms

[0067] The telescopic cylinder 30 pushes the telescopic arm 15 out from the basic arm 11, with a maximum stroke of 8m. The plate-type one-way balance valve 1 (response time <50ms) creates back pressure when the cylinder retracts to prevent the load from stalling; the guide wheel 12 guides the directional movement of the wire rope through the guide wheel pin 13, and the hydraulic winch 37 (drum capacity 200m, line speed 0-15m / min) is equipped with a second pulley 34 set; the rescue boat winch 32 (special working angle ≤20°) is equipped with an angle sensor, which automatically cuts off the power when the limit is exceeded.

[0068] (6) Emergency Redundancy Operation Mode

[0069] The emergency hand pump 50 switches the oil circuit through the bypass valve. The system pressure can reach 8MPa during manual operation, meeting the basic lifting requirements. The emergency slewing rod 58 can drive the tower 6 to rotate when the human input torque is 150N·m; the emergency lowering rod 59 controls the hydraulic winch 37 to slowly descend (speed ≤2m / min).

[0070] (7) Lubrication and wear control

[0071] The straight-through pressure oiling cup 33 (grease injection pressure 10MPa) injects lithium-based grease (NLGI grade 2) into the oil-free bearing 20 every 50 hours to form a boundary lubrication film. The air filter 53 (filtration accuracy 5μm) maintains a slight positive pressure (0.02-0.05MPa) in the oil tank 42 to prevent the intrusion of pollutants. The first V-shaped stopper (material 40Cr, quenching hardness HRC50) has a clearance of ≤0.1mm with the main shaft 8 to limit the radial movement of the tower 6. The clamping plate 16 fixes the base of the telescopic cylinder 30 through the bolt preload (torque 120N·m), and the cleaning cover 41 (quick-opening sealing structure) cleans the sediment at the bottom of the oil tank 42 every 500 hours. The oil drain interface 51 (ball valve control) is connected to the waste oil recovery device to achieve environmentally friendly discharge.

[0072] This crane also serves as a rescue boat crane, with a rescue boat crane / crane selection mode, with the rescue boat crane taking priority;

[0073] In the rescue boat crane mode, the solenoid valve 60 loses power and closes, and the crane function is lost; this crane system is controlled by PLC, and the PLC power supply is a normal / emergency 2-way power supply;

[0074] This crane will automatically return to the rescue boat crane state when the PLC loses power, and some functions of the crane will be lost. When the rescue boat lowering device is in operation, follow the rescue boat winch 32 usage regulations. In the emergency state, the solenoid valve 60 loses power and closes. On the boat, turn the manual valve 61, the lowering device will rotate 180° counterclockwise, turn the heavy hammer,

[0075] The rescue boat was launched.

[0076] This hydraulic system is equipped with a manual pump, which has the same operating principle as the accumulator.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a combined manner.

[0078] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A telescopic crane for a multi-purpose rescue boat, comprising a base (14), characterized in that: A hydraulic pump station (57) is provided on one side of the base (14); a slewing bearing (17) is provided at the top center of the base (14); an oil-free bearing (20) is provided in the slewing bearing (17); a central slewing joint (28) is provided at the top of the slewing bearing; a slewing reducer assembly (27) is installed on the central slewing joint (28); an energy storage component is provided on the other side of the slewing reducer assembly (27); a tower (6) is provided at the top center of the slewing bearing (17); a cover plate (31) is provided at the top of the tower (6); a straight-through pressure injection oil cup (33) is provided on one side of the cover plate (31); a first pulley (21) is provided on one side of the straight-through pressure injection oil cup (33); and the cover plate (31) is connected to the first pulley (21). A main shaft (8) is provided at the connection of the tower (6), the main shaft (8) is provided with a first V-shaped stopper, a clamping plate (16) is provided at the top of the cover plate (31), a telescopic oil cylinder (30) is provided inside the clamping plate (16), a plate-type one-way balancing valve (1) is provided on one side of the telescopic oil cylinder (30), a rescue boat winch (32) is provided on one side of the tower (6), the maximum allowable working angle of the rescue boat winch (32) is ≤20°, a telescopic mechanism assembly (5) is installed on the top of the tower (6), a hydraulic winch (37) is provided on the top of the telescopic mechanism assembly (5), a second pulley (34) is provided on the hydraulic winch (37), and the telescopic mechanism assembly (5) comprises a telescopic arm (15) and a basic arm (11).

2. A multi-purpose rescue boat telescopic crane according to claim 1, characterized in that: The energy storage assembly comprises an AB type energy storage device (35), an energy storage device clamp (36) is provided on the AB type energy storage device (35), and a right amplitude changing plate (18) is connected to one end of the top of the AB type energy storage device (35).

3. A telescopic crane for a multi-purpose rescue boat according to claim 1, characterized in that: A variable-length oil cylinder (7) is provided on one side of the top of the slewing bearing, a manual valve (61) is provided on one side of the variable-length oil cylinder (7), and a solenoid valve (60) is provided on one side of the manual valve (61). A first connecting member (3) is provided at one end of the variable-length oil cylinder (7), and a second connecting member (4) is provided at the other end. One end of the first connecting member (3) is associated with the slewing bearing (17), and one end of the second connecting member (4) is associated with the basic arm (11). A first oil cylinder pin shaft (9) is provided on the first connecting member (3), and a second oil cylinder pin shaft (10) is provided on the second connecting member (4).

4. A multi-purpose rescue boat telescopic crane according to claim 1, characterized in that: A No. 1 valve group (38) is provided on one side of the rotary reducer assembly (27), a No. 2 valve group (40) is provided on one side of the tower (6), and a sealing plate (39) is provided on the No. 2 valve group (40).

5. A telescopic crane for a multi-purpose rescue boat according to claim 1, characterized in that: An oilfield hook (29) is provided below the front end of the telescopic arm (15), an emergency slewing rod (58) is provided on one side of the oilfield hook (29), and an emergency lowering rod (59) is provided on one side of the emergency slewing rod (58).

6. A telescopic crane for a multi-purpose rescue boat according to claim 1, characterized in that: The diameter of the slewing bearing (17) is φ1130 mm. A left amplitude changing plate (19) is provided on one side of the top of the slewing bearing (17). A mounting plate (25) is provided on one side of the left amplitude changing plate (19). A seismic-resistant pressure gauge (26) is provided on the top of the mounting plate (25). A quadruple valve (2) is provided on one side of the mounting plate (25).

7. A telescopic crane for a multi-purpose rescue boat according to claim 1, characterized in that: The hydraulic pump station (57) comprises an oil tank (42), characterized in that: an electric motor (47) is provided on the top of the oil tank (42), a lifting ring (48) is provided on the top of the electric motor (47), an overflow valve (56) is provided on one side of the electric motor (47), an oil pump (57) is provided on one end of the overflow valve (56), a hydraulic pump manual flow regulating valve (49) is provided on one side of the overflow valve (56) and cooperates with the overflow valve (56), an oil return filter is provided on one side of the overflow valve (56), a hydraulic pump oil outlet (55) is provided on one end of the oil return filter, and an oil return interface (54) is provided on the other end, a temperature sensor is provided on one side of the electric motor (47), a temperature type liquid level gauge (45) is provided below the temperature controller (46), an air filter (53) is provided on one side of the top of the oil tank (42), a liquid level controller (52) is provided on one side of the air filter (53), and an oil drain interface (51) is provided on one side of the liquid level controller (52).

8. A telescopic crane for a multi-purpose rescue boat according to claim 1, characterized in that: A cleaning cover (41) is provided at the front end of the oil tank (42), and an emergency hand pump (50) is provided at one side of the oil tank (42).

9. A telescopic crane for a multi-purpose rescue boat according to claim 1, characterized in that: A guide wheel (12) is provided at the top of the telescopic arm (15), and a guide wheel pin shaft (13) is provided on the guide wheel (12).

10. A control method for a telescopic crane for a multi-purpose rescue boat according to claim 1: (1) Oil circulation and pressure control: After the motor (47) is started, the oil pump (57) draws hydraulic oil from the oil tank (42) and delivers it to the actuator through the hydraulic pump oil outlet (55); the overflow valve (56) adopts a pilot pressure feedback structure to dynamically adjust the system pressure (range: 0-25MPa) to prevent overload; the hydraulic pump manual flow control valve (49) adjusts the flow rate (accuracy ±2%) through the throttle hole opening to match different working conditions; the return oil filter is equipped with a high-efficiency filter element with β≥200 to intercept particles with a particle size of ≥10μm to ensure the oil cleanliness NAS 8 level; (2) Accumulator pre-charging and voltage stabilization: The AB type accumulator (35) (volume 10L, nitrogen filling pressure 12MPa) is fixed by an accumulator clamp (36) and pre-pressurized when the system is started to absorb hydraulic shock and compensate for instantaneous flow demand, thereby reducing the peak power consumption of the motor (47); (3) Condition monitoring and safety interlocking The temperature type liquid level gauge (45) (accuracy ±1.5%) monitors the liquid level of the oil tank (42) in real time, triggers the alarm of the liquid level controller (52) (when the liquid level is less than 20%, the machine will be shut down for protection), the temperature sensor is linked with the thermal protection module of the motor (47), and forced cooling is started when the oil temperature is greater than 60°C. The seismic pressure gauge (26) (range 0-40MPa, seismic resistance level VH4) displays the pressure of key nodes, and the four-valve (2) group integrates a pressure compensator to ensure that the error of synchronous action of multiple actuators is ≤3%; (4) Rotation positioning and amplitude adjustment The slewing bearing (17) supports the tower frame (6) through an oil-free bearing (20), with a friction coefficient of ≤0.08, and realizes low-resistance 360° continuous rotation. The slewing reducer assembly (27) (speed ratio 120:1) is controlled by valve group 1 (38), with an output torque of 12 kN·m, and cooperates with the central slewing joint (28) (pressure resistance 35 MPa, leakage <5 drops / min) to realize rotation without pipeline interference. The variable amplitude cylinder (7) is hinged to the left / right variable amplitude plate (18) through the first cylinder pin shaft (9) (hardness HRC45) and the second cylinder pin shaft (10), driving the basic arm (11) to have an elevation angle range of -5° to 75°, and a positioning accuracy of ±0.5°; (5) Telescopic arm (15) dynamic control The telescopic cylinder (30) pushes the telescopic arm (15) to extend from the basic arm (11), with a maximum stroke of 8m. The plate-type one-way balance valve (1) (response time <50ms) creates back pressure when the cylinder retracts to prevent the load from stalling; the guide wheel (12) guides the wire rope to move in a directional manner through the guide wheel pin (13); the hydraulic winch (37) (drum capacity 200m, line speed 0-15m / min) is equipped with a second pulley (34) group; the rescue boat winch (32) (special working condition angle ≤20°) is equipped with an angle sensor, which automatically cuts off the power when the limit is exceeded. (6) Emergency Redundancy Operation Mode The emergency hand pump (50) switches the oil circuit through the bypass valve. When operated manually, the system pressure can reach 8MPa, meeting the basic lifting requirements. The emergency slewing rod (58) can drive the tower (6) to slew when the human input torque is 150N·m; the emergency lowering rod (59) controls the hydraulic winch (37) to slowly descend (speed ≤2m / min). (7) Lubrication and wear control A straight-through pressure oil injection cup (33) (grease injection pressure 10 MPa) injects lithium-based grease (NLGI grade 2) into the oil-free bearing (20) every 50 hours to form a boundary lubrication film. An air filter (53) (filtration accuracy 5 μm) maintains a slight positive pressure (0.02-0.05 MPa) in the oil tank (42) to prevent the intrusion of pollutants. The clearance between the first V-shaped stopper (material 40Cr, quenching hardness HRC50) and the main shaft (8) is ≤0.1 mm, limiting the radial movement of the tower (6). The clamping plate (16) fixes the base of the telescopic oil cylinder (30) through a bolt pre-tightening force (torque 120 N·m). The cleaning cover (41) (quick-opening sealing structure) cleans the sediment at the bottom of the oil tank (42) every 500 hours. The oil drain interface (51) (ball valve control) is connected to a waste oil recovery device to achieve environmentally friendly discharge.

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