Energy storage buffer and synchronous guiding safety system for a marine supply crane

Abstract

The utility model discloses a kind of energy storage buffer and synchronous guiding safety system of marine supply crane, including tower body, boom and hydraulic cylinder, it is characterized by:including hydraulic energy storage buffer unit and integrated guiding mechanism, hydraulic energy storage buffer unit is connected in parallel in the oil circuit of hydraulic cylinder to absorb pressure impact, integrated guiding mechanism is set at the connecting place of boom and tower body, swing path of synchronous constraint hydraulic pipeline and power supply cable.The utility model integrates hydraulic energy storage buffer and pipeline cable guiding, combined with redundancy braking, solve hydraulic impact, wear and tear and braking lag problem, improve the safety and reliability of marine hydraulic crane.

Description

Technical Field

[0001] This utility model belongs to the field of marine hydraulic supply crane technology, and in particular relates to an energy storage buffer and synchronous guidance safety system for a marine supply crane. Background Technology

[0002] Marine hydraulic supply cranes frequently malfunction during offshore operations due to hydraulic shocks, pipeline and cable wear, and braking delays. Traditional solutions rely on relief valves and fixed accumulators for buffering, resulting in slow response and a lack of dynamic adjustment, leading to increased oil temperature and frequent failure of sealing elements. Furthermore, the use of separate guide supports for pipelines and cables makes them prone to entanglement and friction during boom swing, exacerbating leakage and short-circuit risks. Additionally, the delayed response of single mechanical braking can easily exacerbate hull sway due to load inertia. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides an energy storage buffer and synchronous guidance safety system for marine supply cranes, which integrates hydraulic energy storage buffer and pipeline cable guidance, combined with redundant braking, to solve the problems of hydraulic shock, wear and braking lag, and improve the safety and reliability of marine hydraulic cranes.

[0004] Technical solution: To achieve the above objectives, this utility model provides an energy storage buffer and synchronous guidance safety system for a marine supply crane, comprising a tower, a boom, and a hydraulic cylinder. Its features include a hydraulic energy storage buffer unit and an integrated guidance mechanism. The hydraulic energy storage buffer unit is connected in parallel to the hydraulic cylinder's oil circuit to absorb pressure shocks. The integrated guidance mechanism is located at the connection between the boom and the tower, synchronously constraining the swing path of the hydraulic pipeline and power supply cable.

[0005] Furthermore, the hydraulic energy storage buffer unit includes an accumulator, a pressure sensor, and an electromagnetic proportional valve group. The accumulator is connected to the inlet and outlet of the hydraulic cylinder through the electromagnetic proportional valve group. The pressure sensor detects the oil circuit pressure in real time and feeds it back to the controller to adjust the valve group opening.

[0006] Furthermore, the electromagnetic proportional valve group includes a normally open valve and a normally closed valve connected in parallel. When the pressure sensor detects that the oil circuit pressure exceeds the threshold, the controller closes the normally open valve and opens the normally closed valve to introduce high-pressure oil into the accumulator for energy storage.

[0007] Furthermore, it also includes a redundant braking system, which includes a first holding brake and a second holding brake, wherein the first holding brake preferentially engages the piston rod of the hydraulic cylinder in response to an emergency signal from the controller, and the second holding brake delays locking the boom shaft.

[0008] Furthermore, the controller triggers the redundant braking system by comparing the swing angle sensor data of the boom with a preset safety threshold in real time, and simultaneously controls the electromagnetic proportional valve group to release pressure.

[0009] Furthermore, the integrated guiding mechanism includes a pipeline guide rail and a cable guide rail mounted on the tower body via a guide rail base, with hydraulic pipelines passing through a pipe groove slider on the pipeline guide rail and power supply cables passing through a wire groove slider on the cable guide rail.

[0010] Furthermore, both the pipeline guide rail and the cable guide rail have an arc-shaped structure, and the curvature of the pipeline guide rail and the cable guide rail matches the swing angle trajectory of the boom.

[0011] Furthermore, the inner walls of both the tube groove slider and the wire groove slider are provided with an elastic wear-resistant layer.

[0012] Beneficial effects: The hydraulic energy storage buffer unit of this utility model is directly connected to the oil circuit in parallel, which can quickly absorb the hydraulic shock caused by the sudden stop of the boom or the sudden change of load, protect the hydraulic cylinder, and integrate the guiding mechanism to coordinate the path constraint of the hydraulic pipeline and the power supply cable, so as to avoid them from getting tangled or rubbing against the mechanical structure and thus improve the safety and reliability of marine hydraulic supply cranes. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the hydraulic energy storage buffer unit. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] like Figure 1 As shown, a marine supply crane's energy storage buffer and synchronous guidance safety system includes a tower body 1, a boom 2, and a hydraulic cylinder 3. Its key feature is that it further includes a hydraulic energy storage buffer unit 4 and an integrated guiding mechanism 5. The hydraulic energy storage buffer unit 4 is connected in parallel to the hydraulic cylinder 3's oil circuit to absorb pressure shocks. The integrated guiding mechanism is located at the connection between the boom 2 and the tower body 1, synchronously constraining the swing path of the hydraulic pipeline 6 and the power supply cable 7. The hydraulic energy storage buffer unit 4 of this invention is directly connected in parallel to the oil circuit, quickly absorbing hydraulic shocks caused by sudden stops or load changes in the boom 2, protecting the hydraulic cylinder. The integrated guiding mechanism 5 provides coordinated path constraint for the hydraulic pipeline 6 and the power supply cable 7, preventing them from entangled or rubbing against the mechanical structure and thus improving the safety and reliability of the marine hydraulic supply crane.

[0016] like Figure 2As shown, the hydraulic energy storage buffer unit 4 includes an accumulator 41, a pressure sensor 42, and an electromagnetic proportional valve group 43. The accumulator 41 is connected to the inlet and outlet ports of the hydraulic cylinder 3 through the electromagnetic proportional valve group 43. The pressure sensor 42 detects the oil pressure in real time and feeds it back to the controller 8 to adjust the valve group opening. The pressure sensor 42 provides real-time feedback of the oil pressure, and the controller dynamically adjusts the charging and discharging of the accumulator 41 through the electromagnetic proportional valve group 43 to achieve a smooth transition of oil pressure. The accumulator 41 absorbs high-pressure oil and stores energy, which can be released later to assist the smooth start-up of the hydraulic system.

[0017] The electromagnetic proportional valve assembly 43 includes a normally open valve 4.1 and a normally closed valve 4.2 connected in parallel. When the pressure sensor 42 detects that the oil circuit pressure exceeds the threshold, the controller 8 closes the normally open valve 4.1 and opens the normally closed valve 4.2, directing the high-pressure oil into the accumulator 41 for energy storage. The redundant design of the normally open valve 4.1 and the normally closed valve 4.2 ensures rapid switching of the oil circuit under high pressure conditions, avoiding the risk of jamming in traditional single valves. At the same time, the high-pressure oil can be directed into the accumulator 41, reducing energy waste caused by system depressurization.

[0018] This invention also includes a redundant braking system, comprising a first brake 9 and a second brake 10. The first brake 9, responding to an emergency signal from the controller 8, prioritizes engaging the piston rod of the hydraulic cylinder 3. The second brake 10 delays locking the shaft of the boom 2. The controller 8 triggers the redundant braking system by comparing the boom 2's swing angle sensor data with a preset safety threshold in real time, and simultaneously controls the electromagnetic proportional valve group 43 to release pressure. The first brake 9 directly restricts the movement of the hydraulic cylinder 3 to achieve instantaneous braking (less than 200ms), while the second brake 10 locks the boom 2's shaft after a delay of 0.3~0.8 seconds to prevent load inertial swaying. Simultaneous pressure release during braking triggering avoids component damage caused by hydraulic lock-up.

[0019] The hydraulic cylinder 3 has a mounting base 30 on its cylinder body, and the second brake 10 is mounted on the mounting base.

[0020] The integrated guiding mechanism 5 includes a pipeline guide rail 52 and a cable guide rail 53 mounted on the tower body 1 via a guide rail base 51. The hydraulic pipeline 6 passes through a pipe groove slider 54 on the pipeline guide rail 52, and the power supply cable passes through a wire groove slider 55 on the cable guide rail 53. Both the pipeline guide rail 52 and the cable guide rail 53 have an arc-shaped structure. The curvature of the pipeline guide rail 52 and the cable guide rail 53 matches the swing angle trajectory of the boom 2, ensuring that the bending radius of the hydraulic pipeline 6 and the power supply cable 7 remains constant during movement, reducing the risk of fatigue fracture. The inner walls of the pipe groove slider 54 and the wire groove slider 55 are provided with an elastic wear-resistant layer (such as polyurethane). This elastic wear-resistant layer reduces hard friction between the pipeline / cable and the slider, extending service life. Furthermore, the hydraulic pipeline 6 and the power supply cable 7 are designed with separate guide rails to avoid mutual interference and facilitate independent maintenance.

[0021] This utility model also has the following advantages: 1) Improved safety of hydraulic systems The closed loop of "impact absorption - rapid braking - energy management" formed by the energy storage buffer unit 4 and the redundant braking system reduces hydraulic impact pressure and significantly extends the life of cylinders and valve groups; the graded braking mechanism formed by the braking priority of hydraulic cylinder 3 and the rotation of boom 2 greatly shortens the emergency braking response time and reduces the load sway amplitude.

[0022] 2) Enhanced reliability of pipelines and cables The integrated guide mechanism 5 reduces the probability of hydraulic line rupture and cable insulation wear through trajectory matching and elastic protection, significantly reducing the failure rate in marine environments; the split guide rail design supports quick replacement of damaged lines or cables, improving maintenance efficiency.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A storage buffer and synchronous guidance safety system for a marine supply crane, comprising a tower (1), a boom (2), and a hydraulic cylinder (3), characterized in that: It also includes a hydraulic energy storage buffer unit (4) and an integrated guide mechanism (5). The hydraulic energy storage buffer unit (4) is connected in parallel in the oil circuit of the hydraulic cylinder (3) to absorb pressure shocks. The integrated guide mechanism is set at the connection between the boom (2) and the tower body (1) to simultaneously constrain the swing path of the hydraulic pipeline (6) and the power supply cable (7).

2. The energy storage buffer and synchronous guidance safety system for a marine supply crane according to claim 1, characterized in that: The hydraulic energy storage buffer unit (4) includes an accumulator (41), a pressure sensor (42), and an electromagnetic proportional valve group (43). The accumulator (41) is connected to the inlet and outlet of the hydraulic cylinder (3) through the electromagnetic proportional valve group (43). The pressure sensor (42) detects the oil circuit pressure in real time and feeds it back to the controller (8) to adjust the valve group opening.

3. The energy storage buffer and synchronous guidance safety system for a marine supply crane according to claim 2, characterized in that: The electromagnetic proportional valve group (43) includes a normally open valve (4.1) and a normally closed valve (4.2) connected in parallel. When the pressure sensor (42) detects that the oil circuit pressure exceeds the threshold, the controller (8) closes the normally open valve (4.1) and opens the normally closed valve (4.2) to introduce the high-pressure oil into the accumulator (41) for energy storage.

4. The energy storage buffer and synchronous guidance safety system for a marine supply crane according to claim 3, characterized in that: It also includes a redundant braking system, which includes a first brake (9) and a second brake (10), wherein the first brake (9) first engages the piston rod of the hydraulic cylinder (3) in response to an emergency signal from the controller (8), and the second brake (10) delays locking the shaft of the boom (2).

5. The energy storage buffer and synchronous guidance safety system for a marine supply crane according to claim 4, characterized in that: The controller (8) triggers the redundant braking system by comparing the swing angle sensor data of the boom (2) with the preset safety threshold in real time, and simultaneously controls the electromagnetic proportional valve group (43) to release pressure.

6. The energy storage buffer and synchronous guidance safety system for a marine supply crane according to claim 1, characterized in that: The integrated guiding mechanism (5) includes a pipeline guide rail (52) and a cable guide rail (53) mounted on the tower body (1) via a guide rail base (51). The hydraulic pipeline (6) passes through the pipe groove slider (54) on the pipeline guide rail (52), and the power supply cable passes through the wire groove slider (55) on the cable guide rail (53).

7. The energy storage buffer and synchronous guidance safety system for a marine supply crane according to claim 6, characterized in that: Both the pipeline guide rail (52) and the cable guide rail (53) are arc-shaped, and the curvature of the pipeline guide rail (52) and the curvature of the cable guide rail (53) are matched with the swing angle trajectory of the boom (2).

8. The energy storage buffer and synchronous guidance safety system for a marine supply crane according to claim 6, characterized in that: Both the inner walls of the tube groove slider (54) and the wire groove slider (55) are provided with an elastic wear-resistant layer.

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