Active load adjusting bridge system for cutter suction dredger

Abstract

The utility model relates to an active load adjusting bridge system for a cutter suction dredger. Comprising a bridge frame, the root of the bridge frame is hinged to a cutter suction dredger body, a mud pump assembly and a mud pipeline are installed in the middle of the bridge frame, and a reamer assembly is installed at the end of the bridge frame; a portal frame is installed at the position of a bow of the cutter suction dredger body, a pulley system is installed at the top of the portal frame, a lifting pulley is installed at the top of the end of the bridge frame, a lifting winch is further installed on the cutter suction dredger body, and a lifting steel cable collected and released by the lifting winch is wound on the pulley system and the lifting pulley. And a hydraulic load assembly for exerting an active pushing effect on the bridge frame is further mounted between the cutter suction dredger body and the bridge frame. According to the active load adjusting bridge system for the cutter suction dredger, active load control is applied in a hard soil excavation scene, so that the reamer assembly can effectively feed in a water bottom mud surface, smooth construction is achieved, and excavation construction efficiency is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the technical field of cutter suction dredger equipment, and particularly relates to an active load adjustment bridge system for cutter suction dredgers. Background Technology

[0002] Cutter suction dredgers are important vessels used in dredging projects. Their working principle is as follows: the gantry of the vessel is lowered into the water, and the cutterhead assembly at the end of the gantry rotates to excavate the mud surface on the bottom of the water, mixing with the water to form mud. The mud is then lifted along the pipeline by the mud pump and enters the mud pipeline on the deck of the vessel. The mud is then transported ashore by a self-floating mud pipeline or by a barge. During the cutter suction operation, the gantry also swings left and right at a certain angle to achieve cutter suction operation over a certain width of area.

[0003] In existing cutter suction dredgers, after the bridge is lowered into the water, the cutter head assembly rests on the bottom mud surface. The cutter head assembly relies on its own weight and the weight of the bridge to hold it in place, creating pressure on the mud surface. This pressure directly affects the cutter head's cutting depth within the mud. On relatively soft mud surfaces, this pressure allows the cutter head to embed itself, enabling effective excavation. However, in scenarios involving excavation of hard soil, the denser mud prevents the cutter head from embedding itself, leading to slippage and hindering effective cutting depth. This results in reduced project efficiency and, in severe cases, prevents successful construction. Therefore, there is a need to develop and design an active load-adjustable bridge system to address these issues. Utility Model Content

[0004] The purpose of this invention is to provide an active load adjustment bridge system for cutter suction dredgers. In the scenario of excavating hard soil, by applying active load control, the cutter assembly can effectively advance within the muddy surface at the bottom of the water, thereby achieving smooth construction and ensuring excavation efficiency.

[0005] The technical solution adopted by this utility model is as follows: an active load adjustment bridge system for a cutter suction dredger, including a bridge, the root of which is hinged to the hull of the cutter suction dredger; a mud pump assembly and mud pipe are installed in the middle of the bridge; a cutter assembly is installed at the end of the bridge; a portal frame is installed at the bow of the cutter suction dredger; a pulley system is installed on the top of the portal frame; a lifting pulley is installed at the top of the end of the bridge; a lifting winch is also installed on the hull of the cutter suction dredger; the lifting cable, which is wound by the lifting winch, is wound around the pulley system and the lifting pulley; a hydraulic load assembly that applies an active pushing force to the bridge is also installed between the hull of the cutter suction dredger and the bridge.

[0006] Preferably, the hydraulic load assembly includes a slide rail disposed on the hull of the cutter suction dredger, a slider installed in the slide rail, and a top support hydraulic cylinder and a translation hydraulic cylinder. The piston rod end of the top support hydraulic cylinder is hinged to a frame base disposed in the upper part of the bridge, the cylinder body end of the top support hydraulic cylinder is hinged to the slider, the piston rod end of the translation hydraulic cylinder is fixedly connected to the slider, and the cylinder body of the translation hydraulic cylinder is fixedly connected to the hull of the cutter suction dredger.

[0007] Preferably, the pulley system includes a rear pulley and a front pulley. The rear pulley is installed and fixed at the top rear of the portal frame, and an upper support is installed at the top front of the portal frame. The front pulley is installed and fixed on the upper support.

[0008] Preferably, a suspended safety rod is installed at the front of the gantry frame, and a connecting base is installed at the top of the end of the cable tray. When the cable tray is lifted to the retracted state, the lower end of the safety rod is connected to the connecting base by a locking pin.

[0009] Preferably, a U-shaped bow platform is also installed in front of the middle of the gantry frame, and when the bridge is raised to the retracted state, the cutterhead assembly is located inside the bow platform.

[0010] The advantages and positive effects of this utility model are:

[0011] This invention provides an active load adjustment bridge system for a cutter suction dredger. Compared with existing bridge systems for cutter suction dredgers, this invention's bridge system is equipped with a hydraulic load assembly. During cutter suction operation, the hydraulic load assembly provides an adjustable load to the bridge and cutter assembly using hydraulic pressure. Therefore, the bridge and cutter assembly no longer rely solely on their own weight to press down on the bottom mud surface, but instead use their own weight plus an active hydraulic load to press down on the bottom mud surface. When encountering hard soil conditions during dredging, the active application of the hydraulic load increases the downward pressure of the cutter assembly on the bottom mud surface, making it easier for the cutter blades to embed into the hard mud surface without slippage. This allows for effective cutting and excavation, facilitating smooth construction and improving dredging efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of this utility model, with the cable tray in the lowered position;

[0013] Figure 2 This is a schematic diagram of the main structure of this utility model, showing the cable tray in a retracted state.

[0014] In the picture:

[0015] 1. Hull of the cutter suction dredger; 2. Safety railing; 3. Lateral winch; 4. Bridge frame; 5. Frame base; 6. Mud pipe; 7. Mud pump assembly; 8. Connecting base; 9. Lifting pulley; 10. Cutter head assembly; 11. Top support hydraulic cylinder; 12. Slide rail; 13. Translation hydraulic cylinder; 14. Lifting winch; 15. Lifting cable; 16. Portal frame; 17. Rear pulley of the frame; 18. Front pulley of the frame; 19. Frame support; 20. Bow platform; 21. Safety boom. Detailed Implementation

[0016] To further understand the invention content, features and effects of this utility model, the following embodiments are provided in detail.

[0017] Please see Figure 1 and Figure 2 The present invention discloses an active load adjustment bridge system for a cutter suction dredger, comprising a bridge 4, the root of which is hinged to the hull 1 of the cutter suction dredger. A mud pump assembly 7 and a mud pipe 6 are installed in the middle of the bridge 4, and a cutter assembly 10 is installed at the end of the bridge 4. The mud pump assembly 7 consists of a mud pump and a mud pump motor / mud pump hydraulic motor, and the cutter assembly 10 consists of a cutter and a cutter motor / cutter hydraulic motor.

[0018] The cable tray 4 can be raised and lowered, and during dredging operations, it is lowered underwater until the cutter head of the cutter assembly 10 rests on the mud surface at the bottom of the water. Figure 1 As shown in the diagram; in non-construction and maintenance states, the cable tray 4 and its accessories are raised above the water surface and are in a basically horizontal position, as indicated. Figure 2 As shown in the image.

[0019] Safety railings are installed on the hull 1 of the cutter suction dredger, and sidewall tires are installed on the side of the hull 1 of the cutter suction dredger.

[0020] A portal frame 16 is installed at the bow of the cutter suction dredger 1. A pulley system is installed on top of the portal frame 16, and a lifting pulley 9 is installed at the top end of the bridge frame 4. A lifting winch 14 is also installed on the hull 1 of the cutter suction dredger. The lifting cable 15, which is wound and released by the lifting winch 14, is wound around the pulley system and the lifting pulley 9. In this embodiment, the pulley system includes a rear pulley 17 and a front pulley 18. The rear pulley 17 is fixedly installed at the rear top of the portal frame 16, and an upper support 19 is installed at the front top of the portal frame 16. The front pulley 18 is fixedly installed on the upper support 19. The lifting winch 14 controls the winding and releasing of the lifting cable 15 to achieve the lifting and lowering control of the bridge frame 4.

[0021] It also includes a transverse winch 3, which is installed and fixed at the root of the cable tray 4. Transverse pulleys are installed on both sides of the end of the cable tray 4. The transverse winch 3 controls the winding and unwinding of the transverse cable, allowing the cable tray 4 and its auxiliary components to swing left and right at a certain angle, so as to realize the dredging and suction construction in a certain width area.

[0022] A hydraulic load assembly that applies an active pushing force to the bridge frame 4 is also installed between the hull 1 and the bridge frame 4 of the cutter suction dredger. The hydraulic load assembly includes a slide rail 12 installed on the hull 1 of the cutter suction dredger, which is arranged along the length of the cutter suction dredger, and a slider is installed in the slide rail 12. It also includes a jacking hydraulic cylinder 11 and a translation hydraulic cylinder 13. The piston rod end of the jacking hydraulic cylinder 11 is hinged to the frame base 5 located in the upper part of the bridge frame 14, and the cylinder body end of the jacking hydraulic cylinder 11 is hinged to the slider. The piston rod end of the translation hydraulic cylinder 13 is fixedly connected to the slider, and the cylinder body of the translation hydraulic cylinder 13 is fixedly connected to the hull 1 of the cutter suction dredger.

[0023] Among them, the translation hydraulic cylinder 13 is used to move the top support hydraulic cylinder 11 back and forth. The top support hydraulic cylinder 11 is used to provide hydraulic load control for the bridge frame 14. By providing active hydraulic load to the bridge frame 4, the pressure of the cutter head of the cutter assembly 10 on the mud surface at the bottom of the water is increased, which promotes the embedding of the cutter head into the mud surface, avoids slippage, achieves effective excavation and improves the efficiency of dredging construction.

[0024] In this embodiment, a suspended safety rod 21 is also installed at the front of the portal frame 16, and a connecting base 8 is installed at the top of the end of the cable tray 4. The cable tray 4 is raised to... Figure 2 In the recovery state shown, the lower end of the safety boom 21 is connected to the connecting base 8 by a locking pin, which can lock and fix the cable tray 4 in the recovery state, thus improving safety.

[0025] In this embodiment, a U-shaped bow platform 20 is also installed in front of the middle part of the portal frame 16, and the bridge frame 4 is raised to... Figure 2 In the recovery state shown, the cutterhead assembly 10 is located inside the bow platform 20, which serves as a maintenance platform for the cutterhead assembly.

[0026] Operating method:

[0027] After the cutter suction dredger is stationed at the construction position (using the steel pile positioning device configured on the vessel itself for positioning), the locking and fixing effect of the safety boom 21 on the bridge frame 4 is released. Then, the lifting winch 14 releases the lifting steel cable 15, and the bridge frame 4 and its auxiliary components are lowered into the water. During the operation of the lifting winch 14, the top support hydraulic cylinder 11 and the translation hydraulic cylinder 13 also move synchronously. Specifically, the piston rod of the translation hydraulic cylinder 13 extends synchronously, pushing the top support hydraulic cylinder 11 forward. The piston rod of the top support hydraulic cylinder 11 extends synchronously to adapt to the angle change of the bridge frame 4 as it is gradually lowered. Finally, the cutter of the cutter assembly 10 lands on the mud surface at the bottom of the water.

[0028] When the bottom mud surface is hard soil, the mud concentration in the mud pipe 6 during the cutter suction dredging operation can be used to determine the condition. Since hard soil can prevent the cutter assembly 10 from advancing smoothly and thus fail to cut effectively, the mud concentration in the mud pipe 6 decreases. This condition can be observed through the instruments in the control room. The hydraulic station is then operated to extend the piston rod of the top support hydraulic cylinder 11 further, applying active load control to the bridge frame 4. The active load of the bridge frame 4 is increased by hydraulic pressure, which increases the pressure of the cutter assembly 10 on the bottom mud surface, allowing it to successfully embed into the hard soil layer and carry out cutting and excavation smoothly.

Claims

1. An active load-adjusting bridge system for a cutter suction dredger, characterized in that: The system includes a bridge (4), the root of which is hinged to the hull (1) of the cutter suction dredger. A mud pump assembly (7) and a mud pipe (6) are installed in the middle of the bridge (4), and a cutter assembly (10) is installed at the end of the bridge (4). A portal frame (16) is installed at the bow of the hull (1) of the cutter suction dredger. A pulley system is installed on the top of the portal frame (16), and a lifting pulley (9) is installed on the top of the end of the bridge (4). A lifting winch (14) is also installed on the hull (1) of the cutter suction dredger. The lifting cable (15) that is pulled up and released by the lifting winch (14) is wound around the pulley system and the lifting pulley (9). A hydraulic load assembly that applies an active pushing action to the bridge (4) is also installed between the hull (1) of the cutter suction dredger and the bridge (4).

2. The active load adjusting bridge system for a cutter suction dredger as described in claim 1, characterized in that: The hydraulic load assembly includes a slide rail (12) installed on the hull (1) of the cutter suction dredger, a slider installed in the slide rail (12), a top support hydraulic cylinder (11) and a translation hydraulic cylinder (13). The piston rod end of the top support hydraulic cylinder (11) is hinged to the frame base (5) located in the upper part of the bridge frame (4). The cylinder body end of the top support hydraulic cylinder (11) is hinged to the slider. The piston rod end of the translation hydraulic cylinder (13) is fixedly connected to the slider. The cylinder body of the translation hydraulic cylinder (13) is fixedly connected to the hull (1) of the cutter suction dredger.

3. The active load adjusting bridge system for a cutter suction dredger as described in claim 2, characterized in that: The pulley system includes a rear pulley (17) and a front pulley (18). The rear pulley (17) is installed and fixed at the top rear of the portal frame (16). A support (19) is installed at the top front of the portal frame (16), and the front pulley (18) is installed and fixed on the support (19).

4. The active load adjusting bridge system for a cutter suction dredger as described in claim 3, characterized in that: A suspended safety rod (21) is installed at the front of the gantry frame (16), and a connecting base (8) is installed at the top of the end of the cable tray (4). When the cable tray (4) is raised to the retracted state, the lower end of the safety rod (21) is connected to the connecting base (8) by a locking pin.

5. The active load adjusting bridge system for a cutter suction dredger as described in claim 4, characterized in that: A U-shaped bow platform (20) is also installed in front of the middle part of the portal frame (16). When the bridge frame (4) is raised to the retracted state, the cutter assembly (10) is located inside the bow platform (20).

Images