A reliable and convenient method for connecting the bridge to the trunnion of a small cutter suction dredger

Abstract

The application relates to a reliable and convenient small cutter suction dredger bridge frame trunnion connection method, wherein a main float tank is connected with a main bridge frame of a bridge frame system through a trunnion structure; step one, main float tank reinforcing structures are welded on the two sides corresponding to the connection between the main float tank and the bridge frame system, main float tank sleeves are welded on each main float tank reinforcing structure; bridge frame reinforcing structures are welded on the two sides corresponding to the connection between the main bridge frame of the bridge frame system and the main float tank, bridge frame sleeves are welded on each bridge frame reinforcing structure, and sliding bearings are installed in the bridge frame sleeves; a bearing end cover and a small handle are sequentially welded at one end of the trunnion to form a combination; step two, the bridge frame system is hoisted to the main float tank through hoisting equipment, the combination of the trunnion is inserted into the main float tank sleeve and the bridge frame sleeve, and is fixed through bolts, and the bridge frame connection is completed. The application is simple in operation, convenient in use and installation, strong in reliability, easy to maintain and disassemble, can guarantee the connection strength, and can meet the requirements of normal ship construction.

Description

Technical Field

[0001] This invention belongs to the technical field of small cutter suction dredgers, and in particular relates to a reliable and convenient method for connecting the trunnions of the bridge frame of a small cutter suction dredger. Background Technology

[0002] Cutter suction dredgers primarily rely on cutter heads for dredging operations. These cutter heads are mounted on a jacking structure, and the dredging force is transmitted to the jacking structure via a transmission system, which then transfers it to the hull. The jacking structure is mainly connected to the main hull via two trunnions. Weighing tens or even hundreds of tons, and considering the reaction forces during dredging, the trunnion structure experiences complex and variable loads. A trunnion failure will directly impact dredging operations. Furthermore, for environmentally friendly small dredgers, rapid installation and disassembly are crucial. Therefore, the trunnion connection must meet both the structural strength requirements of the dredger and facilitate quick and easy disassembly, making it paramount. Summary of the Invention

[0003] To address the problems existing in the prior art, this invention provides a reliable and convenient method for connecting the trunnions of a bridge frame on a small cutter suction dredger. This method connects the bridge frame and the main buoy box of the dredger using a reinforced trunnion structure. First, the trunnion, bearing end cap, and small handle are welded together. Then, the assembly is inserted into the main buoy box sleeve and the bridge frame sleeve and secured with bolts, thereby limiting the axial displacement of the trunnion. A limiting block is welded to the end face of the main buoy box sleeve to facilitate the installation of the bearing end cap. A small handle is welded to the outside of the bearing end cap to facilitate the disassembly and installation of the trunnion. This bridge frame trunnion connection method is simple to operate, convenient to use and install, highly reliable, and easy to maintain and disassemble, ensuring connection strength while meeting the requirements of normal shipboard operations.

[0004] This invention is implemented as follows: a reliable and convenient method for connecting the bridge frame of a small cutter suction dredger using trunnions, wherein the main buoy of the cutter suction dredger is connected to the main bridge frame of the bridge system via a trunnion structure; the specific steps are as follows:

[0005] Step 1: Weld main buoy reinforcement structures to the two sides corresponding to the connection between the main buoy and the bridge system, and weld main buoy sleeves to each main buoy reinforcement structure; weld bridge reinforcement structures to the two sides corresponding to the connection between the main bridge and the main buoy of the bridge system, weld bridge sleeves to each bridge reinforcement structure, and install sliding bearings inside the bridge sleeves.

[0006] A bearing end cap and a small handle are welded sequentially to one end of the trunnion to form an assembly.

[0007] Step 2: Use lifting equipment to hoist the cable tray system to the main buoy box, insert the trunnion assembly into the main buoy box sleeve and the cable tray sleeve, and fix it with bolts to complete the cable tray connection.

[0008] The main pontoon connection structure is reinforced and a sleeve structure is installed to meet the connection strength requirements. At the same time, the main bridge connection structure of the bridge system is reinforced and a sleeve structure is installed to facilitate the insertion of trunnions to connect the two structures together. After the trunnions are inserted into the main pontoon sleeve and the bridge sleeve, the two structures are connected together. After the trunnions are inserted, they are fixed with bolts to limit the axial displacement of the trunnions.

[0009] In the above technical solution, preferably, a limiting block is welded to the end face of each main float sleeve away from the side float, and the bottom end face of the limiting block is aligned with the upper end face of the bearing end cover after the trunnion is installed.

[0010] In the above technical solution, preferably, when welding the trunnion, bearing end cap and small handle, the bearing end cap is welded to one end of the trunnion and to the outer end face along the axial direction, and the small handle is welded to the connection between the bearing end cap and the trunnion.

[0011] In the above technical solution, preferably, the cutter suction dredger has a split structure. The main hull of the dredger consists of several modules, including a main buoy box, four side buoy boxes, a steel pile trolley buoy box, and the bridge system. The four side buoy boxes are located at the bow and midway on the left and right sides of the vessel, respectively. The main buoy box is located between the two side buoy boxes in the midway of the vessel. The steel pile trolley buoy box is located at the stern of the vessel and is connected to the main buoy box. The bridge system is located in the slot between the two side buoy boxes at the bow of the vessel. The main buoy box, side buoy boxes, and steel pile trolley buoy box are all fixed together by bolts at their connection points.

[0012] In the above technical solution, a further preferred embodiment is that each individual module of the environmentally friendly cutter suction dredger is equipped with a lifting lug structure, which can be used to complete the assembly, loading and unloading of the vessel.

[0013] In the above technical solution, preferably, the cable tray system includes a main cable tray, a mud pipe, and a cutter drive unit. The mud pipe is located below the main cable tray and is connected to the main cable tray via a clip. The cutter drive unit is connected to both the main cable tray and the mud pipe.

[0014] In the above technical solution, a further preferred embodiment is that the main cable tray comprises a steel pipe with a diameter of 1000 mm.

[0015] The advantages and positive effects of this invention are:

[0016] The present invention provides a reliable and convenient method for connecting the trunnions of a small cutter suction dredger bridge. Due to the adoption of a novel technical solution, compared with existing technologies, ① it separately sets up reinforced structures with welded bushings for local structures of the main buoy box and the main bridge, connecting the bridge and main buoy box via trunnions, simplifying operation while meeting strength requirements; ② after the trunnion with a bearing end cap fixed at one end is inserted, it is fixed to the main buoy box sleeve with bolts, thereby limiting the axial displacement of the trunnion. A limiting stop is welded to the end face of the main buoy box sleeve to facilitate the installation of the bearing end cap, and a small handle is welded to the outside of the bearing end cap for easy disassembly and installation of the trunnion; ③ the bridge trunnion connection method is simple to operate, convenient to use and install, highly reliable, and easy to maintain and disassemble, ensuring connection strength while meeting the requirements of normal ship construction. Attached Figure Description

[0017] Figure 1 This is a top view of the split-type cutter suction dredger provided in an embodiment of the present invention;

[0018] Figure 2 This is a front view of the split-type cutter suction dredger provided in an embodiment of the present invention;

[0019] Figure 3 This is a top view of the cable tray system provided in an embodiment of the present invention;

[0020] Figure 4 This is a front view of the cable tray system provided in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the cable tray reinforcement structure provided in an embodiment of the present invention;

[0022] Figure 6 This is a top view of the main pontoon provided in an embodiment of the present invention;

[0023] Figure 7 This is a front view of the main buoy box provided in an embodiment of the present invention;

[0024] Figure 8 This is a side view of the trunnion connection provided in an embodiment of the present invention;

[0025] Figure 9 This is a cross-sectional view of the trunnion connection provided in an embodiment of the present invention.

[0026] In the diagram: 1. Main buoy; 2. Side buoy; 3. Steel pile trolley buoy; 31. Steel pile trolley system; 32. Main steel pile; 33. Auxiliary steel pile; 4. Bridge system; 5. Main bridge; 6. Mud pipe; 7. Cutter drive unit; 8. Main buoy reinforcement structure; 9. Bridge reinforcement structure; 10. Main buoy sleeve; 11. Bridge sleeve; 12. Sliding bearing; 13. Trunnion; 14. Bearing end cap; 15. Bolt; 16. Limiting block; 17. Small handle. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] Example

[0031] Please see Figures 1-9 This embodiment provides a reliable and convenient method for connecting the trunnions of a bridge frame in a small cutter suction dredger. The cutter suction dredger has a split structure, and the main hull of the dredger consists of several modules: a main buoy 1, four side buoys 2, a steel pile trolley buoy 3, and a bridge system 4. The four side buoys 2 are located at the bow and midway on the left and right sides of the vessel, respectively. The main buoy 1 is located between the two side buoys 2 in the midway of the vessel. The steel pile trolley buoy 3 is located at the stern of the vessel and connected to the main buoy 1. The vessel moves forward through the steel pile trolley system 31 within the steel pile trolley buoy 3, and is positioned by steel piles (including main steel piles 32 and auxiliary steel piles 33). The lateral movement system pulls the vessel to sway left and right, driving the cutter head system to complete the dredging operation. The bridge system 4 is located in the slot between the two side buoys 2 at the bow of the vessel. The main buoy 1, side buoys 2, and steel pile trolley buoy 3 are all fixed together by bolts.

[0032] Each individual module of the cutter suction dredger is equipped with a lifting lug structure, which allows for the assembly, loading, unloading, and transportation of the vessel using lifting equipment.

[0033] The bridge system 4 is connected to the main buoy 1 of the environmentally friendly cutter suction dredger. The bridge system 4 includes a main bridge 5, a mud pipe 6, and a cutter drive unit 7. The main bridge 5 is connected to the main buoy 1 through a trunnion structure. The main bridge 5 includes a steel pipe with a diameter of 1000mm. The mud pipe 6 is located below the main bridge 5 and is connected to the main bridge 5 through a buckle. The cutter drive unit 7 is connected to both the main bridge 5 and the mud pipe 6. The cutter drive unit 7 can be disassembled as a whole to facilitate transportation when the overall length of the bridge is too long.

[0034] The main buoy of the cutter suction dredger is connected to the main bridge of the bridge system via a trunnion structure. The trunnion structure includes a main buoy reinforcement structure 8, a bridge reinforcement structure 9, and a trunnion 13. The main buoy 1 has a main buoy reinforcement structure 8 on each side corresponding to its connection with the main bridge 5, and each main buoy reinforcement structure 8 has a main buoy sleeve 10. The main bridge 5 has a bridge reinforcement structure 9 on each side corresponding to its connection with the main buoy 1, and each bridge reinforcement structure 9 has a bridge sleeve 11. A sliding bearing 12 is installed inside the bridge sleeve 11 to facilitate the insertion of the trunnion 13, connecting the two structures together. The trunnion 13 is inserted into the main buoy sleeve 10 and the bridge sleeve 11. The main bridge 5 is connected to the main buoy 1 via the trunnion 13. Using the trunnion 13 as the rotation center, the bridge is raised and lowered, meeting the requirements of cutter head dredging operations. One end of the trunnion 13 is fixed with a bearing end cap 14, which is fixed to the end face of the main float sleeve 10 by bolts 15, thereby restricting the axial displacement of the trunnion 13.

[0035] A limiting block 16 is also welded to the end face of the main float sleeve 10. The bottom end face of the limiting block is aligned with the upper end face of the bearing end cover after the trunnion is installed, which facilitates the installation of the bearing end cover 14. A small handle 17 is welded to the outside of the bearing end cover 14 to facilitate the disassembly and installation of the trunnion 13.

[0036] The specific connection process is as follows:

[0037] Step 1: Weld main buoy box reinforcing structures 8 on the two sides corresponding to the connection between the main buoy box 1 and the bridge system 4, and weld main buoy box sleeves 10 on each main buoy box reinforcing structure 8; weld bridge frame reinforcing structures 9 on the two sides corresponding to the connection between the main bridge frame 5 and the main buoy box 1 in the bridge system 4, and weld bridge frame sleeves 11 on each bridge frame reinforcing structure 9; install sliding bearings 12 inside the bridge frame sleeves 11.

[0038] A bearing end cap 14 and a small handle 17 are sequentially welded to one end of the trunnion 13 to form an assembly; the bearing end cap 14 is welded to the outer end face of one end of the trunnion 13 along the axial direction, and the small handle 17 is welded to the connection between the bearing end cap 14 and the trunnion 13.

[0039] Step 2: Lift the cable tray system 4 to the main buoy box 1 using lifting equipment, insert the trunnion assembly into the main buoy box sleeve 10 and the cable tray sleeve 11, and fix it with bolts 15 to complete the cable tray connection.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reliable and convenient method for connecting the bridge frame trunnions of a small cutter suction dredger, wherein the cutter suction dredger has a split structure, and the main buoy box of the cutter suction dredger is connected to the main bridge frame of the bridge frame system via a trunnion structure; characterized in that, The specific steps are as follows: Step 1: Weld main buoy reinforcement structures to the two sides corresponding to the connection between the main buoy and the bridge system, and weld main buoy sleeves to each main buoy reinforcement structure; weld bridge reinforcement structures to the two sides corresponding to the connection between the main bridge and the main buoy of the bridge system, weld bridge sleeves to each bridge reinforcement structure, and install sliding bearings inside the bridge sleeves. A bearing end cap and a small handle are sequentially welded to one end of the trunnion to form an assembly. When welding the trunnion, bearing end cap and small handle, the bearing end cap is welded to the outer end face of one end of the trunnion along the axial direction, and the small handle is welded to the connection between the bearing end cap and the trunnion. Step 2: Lift the cable tray system to the main buoy using lifting equipment, insert the trunnion assembly into the main buoy sleeve and the cable tray sleeve, and fix it with bolts to complete the cable tray connection. This allows the cable tray to be lifted and lowered with the trunnion as the rotation center, meeting the requirements of the cutter head excavation operation. A limiting block is welded to the end face of each main float box sleeve away from the side float box. The bottom end face of the limiting block is aligned with the upper end face of the bearing end cover after the trunnion is installed. The bearing end cover is fixed to the end face of the main float box sleeve by bolts, thereby limiting the axial displacement of the trunnion.

2. The reliable and convenient method for connecting the trunnions of the bridge frame of a small cutter suction dredger according to claim 1, characterized in that, The main hull of the dredger consists of several modules, including a main buoy, four side buoys, a steel pile trolley buoy, and a bridge system. The four side buoys are located at the bow and midships on the left and right sides of the vessel, respectively. The main buoy is located between the two side buoys in the midships. The steel pile trolley buoy is located at the stern and connected to the main buoy. The bridge system is located in the slot between the two side buoys at the bow. The main buoy, side buoys, and steel pile trolley buoy are all fixed together by bolts.

3. The reliable and convenient method for connecting the trunnions of the bridge frame of a small cutter suction dredger according to claim 2, characterized in that, Each individual module of the cutter suction dredger is equipped with a lifting lug structure, which allows for the assembly, loading, unloading, and transportation of the vessel using lifting equipment.

4. The reliable and convenient method for connecting the trunnions of the bridge frame of a small cutter suction dredger according to claim 1, characterized in that, The cable tray system includes a main cable tray, a mud pipe, and a cutter drive unit. The mud pipe is located below the main cable tray and is connected to the main cable tray via a clip. The cutter drive unit is connected to both the main cable tray and the mud pipe.

5. The reliable and convenient method for connecting the trunnions of a small cutter suction dredger bridge as described in claim 1, characterized in that, The main cable tray consists of steel pipes with a diameter of 1000mm.

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