A trimaran relative displacement self-unloading connection device and trimaran

Abstract

The application relates to a trihull piece relative displacement self-unloading connecting device and a trihull, the connecting device comprising a piece connecting base, a connecting bridge connecting base, a plurality of bolts, a plurality of nuts, a plurality of pressure springs and at least one redundant connecting piece, a first flange and a second flange are oppositely arranged to form a pair of flange faces; each bolt passes through corresponding bolt holes of the first flange and the second flange in sequence; each nut is threadedly connected with the end of one bolt; each pressure spring is sleeved on one bolt and is located between the first flange and the second flange; and the initial compression amount of the pressure spring is generated by tightening the nut. When the first flange and the second flange present a mutual approaching movement trend, the pressure spring is further compressed and deformed to release the relative displacement between the first flange and the second flange; and when the first flange and the second flange present a mutual moving away movement trend, the bolt bears a tensile load to maintain the connection.

Description

Technical Field

[0001] This application relates to the field of trimaran hull connection technology, and in particular to a trimaran hull relative displacement self-unloading connection device and a trimaran. Background Technology

[0002] A trimaran typically consists of a main hull and two planar sections connected to the main hull by a connecting bridge. When the trimaran is rocking in the waves, the planar sections generate buoyancy and provide restoring torque, which reduces the amplitude of the ship's rocking motion and thus increases the stability of the ship.

[0003] One patent, titled "A Trimaran with a Shock Absorption Device," provides a hydraulic shock absorption device. When impacted by waves, the hydraulic shock absorber rods can contract vertically to absorb vibrations, improving the trimaran's shock absorption and seakeeping performance. However, trimarans in waves experience not only vertical heave but also a combination of six degrees of freedom: heave, roll, bow roll, and pitch. The relative motion between the hulls and the main hull results in enormous loads at their connection points. This patent primarily absorbs vertical loads, and because the line contact of the connecting plates cannot withstand the massive loads generated by roll, it struggles to meet the requirements for relative motion between the hulls and the main hull and structural safety, thus exhibiting significant limitations.

[0004] Typically, ship design primarily employs a rigid design approach, with the main hull and hulls connected by welding. The rigidity of the connecting bridge structure resists the relative deformation of the hulls during movement, thereby bearing the external loads transmitted from the hulls. To improve ship stability, trimaran ships often increase the spacing between the hulls to increase the restoring moment, which in turn significantly increases the load on the connecting bridge. This leads to increased dimensions and weight of the connecting bridge components, resulting in a substantial increase in the need for lightweight structural design. To achieve lightweight design, one approach is to improve the structural load-bearing capacity through the use of higher-strength materials and optimized structural forms. However, due to limitations in connecting bridge type and manufacturing processes, the optimization effect is limited. Another approach is to reduce the external load on the structure. External loads are related to the operating environment and connection method. The operating environment depends on the trimaran's function, leaving limited room for improvement.

[0005] Currently, ship hull structures are generally connected by welding, which is a rigid connection. Rigid connections mainly bear the load through structural deformation, making it difficult to reduce external loads.

[0006] Therefore, we propose a trimaran hull relative displacement self-unloading connection device and a trimaran. Summary of the Invention

[0007] To address the shortcomings of existing production technologies, this applicant provides a trimaran hull relative displacement self-unloading connection device and a trimaran. When the hull connection base and the connecting bridge connection base move relative to each other, the relative displacement between the hull and the main hull is autonomously released through the deformation of the pressure spring, thereby effectively reducing the connection load on the connecting bridge and providing a basis for lightweight design of the connecting bridge. By changing the stiffness of the pressure spring, both large and small impact loads transmitted by the connection structure can be simultaneously met.

[0008] This application discloses a trimaran hull relative displacement self-unloading connection device, applied in a trimaran, comprising: The plate-shaped connecting base includes a first flange; The connecting bridge base includes a second flange, and the first flange and the second flange are arranged opposite to each other to form a pair of flange faces; Multiple bolts and multiple nuts, each bolt passing sequentially through the corresponding bolt holes of the first flange and the second flange; each nut being threaded to the end of a bolt; Multiple pressure springs, each pressure spring is sleeved on a bolt and positioned between the first flange and the second flange; At least one redundant connector, whose two ends are detachably connected to the plate connecting base and the connecting bridge connecting base, respectively; In this system, tightening the nut causes the pressure spring to generate initial compression. When the first flange and the second flange tend to move closer to each other, the pressure spring is further compressed and deformed, releasing the relative displacement between the first flange and the second flange. When the first flange and the second flange tend to move away from each other, the bolt bears tensile load to maintain the connection. The redundant connection does not bear load under normal working conditions, but provides auxiliary connection protection under extreme overload conditions.

[0009] Its further features are: It also includes multiple gaskets, with two gaskets fitted on a single bolt, and the first and second flanges positioned between the two gaskets.

[0010] The bolts, nuts, and washers are all made of the same metal material. The thickness of the washers is 5-20mm, and they are used to distribute the concentrated load of the bolts and nuts on the first and second flanges.

[0011] Both the sheet-connecting base and the connecting bridge base also include a base web and several reinforcing elbow plates.

[0012] The reinforcing elbow plate is provided with a connection hole. The reinforcing elbow plates of the plate connecting base and the connecting bridge connecting base are correspondingly arranged. The two ends of the redundant connector are connected to the reinforcing elbow plate through the connection hole.

[0013] The redundant connector includes two U-shaped buckles and multiple high-strength female and male rings, which are connected sequentially, and each high-strength female and male ring is connected to a U-shaped buckle.

[0014] The compression spring is a cylindrical helical compression spring.

[0015] The first flange and the second flange can undergo translation, lateral rotation, longitudinal rotation, and combinations of the above movements between two planes to adapt to the six-degree-of-freedom motion requirements of the trimaran in waves. By deforming multiple pressure springs to varying degrees, a flexible connection between the first flange and the second flange is achieved, avoiding the huge load generated by the rigid connection and thus reducing the connection load.

[0016] This application also discloses a trimaran, which includes a main hull and two hulls. The two hulls are located on both sides of the main hull. A connecting bridge is fixed on the main hull. The two ends of the connecting bridge are connected to the hulls by a trimaran hull relative displacement self-unloading connecting device as described in any one of claims 1-8. The connecting bridge connecting base of the connecting device is fixedly connected to the connecting bridge, and the hull connecting base of the connecting device is fixedly connected to the hull.

[0017] The connecting bridge base is fixedly installed on the outer plate of the connecting bridge, and the plate connecting base is fixedly installed on the deck surface of the plate.

[0018] The beneficial effects of this application are as follows: This application features a compact and rational structure, and is easy to operate. When the plate connecting base and the connecting bridge connecting base move relative to each other, the relative displacement between the plate and the main hull is autonomously released through the deformation of the pressure spring, thereby effectively reducing the connecting load of the connecting bridge and providing a basis for the lightweight design of the connecting bridge. By changing the stiffness of the pressure spring, both large and small impact loads transmitted by the connecting structure can be simultaneously met.

[0019] In addition, this application also has the following advantages: (1) There is a stiffness difference between the pressure spring and the connecting bridge, which will change the vibration mode of the trimaran. The pressure spring can absorb the vibration excitation transmitted to the connecting bridge by the plate connecting base, thereby reducing the vibration of the connecting bridge and the main hull, which is beneficial to improving the comfort of the trimaran.

[0020] (2) When the pressure spring is stretched to a certain limit, the bolt begins to bear the tensile load, which plays an overload protection role; and the connection of U-shaped buckle and high-strength female ring improves the safety redundancy of the connection device. The connection of bolts and nuts is simple in structure, has high safety and reliability, and is easy to install and disassemble, and convenient for inspection and maintenance.

[0021] (3) The first flange and the second flange are arranged opposite each other to form a pair of flange faces. Various relative movements can occur between the two flange faces, such as translation, lateral rotation, longitudinal rotation and combined movements between the two planes, which can meet the combined movement requirements of the six degrees of freedom of the ship. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the connection device for this application. Figure 1 .

[0023] Figure 2 This is a schematic diagram of the connection device for this application. Figure 2 .

[0024] Figure 3 This is a schematic diagram of the motion state of the connecting device in this application.

[0025] Figure 4 This is a schematic diagram of the sheet body connection base of this application.

[0026] Figure 5 This is a schematic diagram of the connecting bridge base of this application.

[0027] Figure 6 This is a schematic diagram of the trimaran vessel proposed in this application.

[0028] Figure 7 for Figure 6 Side view.

[0029] Among them: 100, trimaran; 200, hull connecting base; 300, connecting bridge connecting base; 400, bolt; 500, nut; 600, washer; 700, bearing spring; 800, redundant connector; 101. Main hull; 102. Sheet hull; 103. Connecting bridge; 201. First flange; 301. Second flange; 801, U-shaped buckle; 802, high-strength male and female rings. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0036] A trimaran hull relative displacement self-unloading connection device, applied in a trimaran 100, includes a hull connection base 200, a connecting bridge connection base 300, multiple bolts 400, multiple nuts 500, multiple pressure springs 700, and at least one redundant connector 800. The plate-connecting base 200 includes a first flange 201.

[0037] The connecting bridge base 300 includes a second flange 301, and the first flange 201 and the second flange 301 are arranged opposite to each other to form a pair of flange faces.

[0038] Each bolt 400 passes through the corresponding bolt holes of the first flange 201 and the second flange 301 in sequence; each nut 500 is threaded to the end of a bolt 400.

[0039] Each pressure spring 700 is fitted around a bolt 400 and is located between the first flange 201 and the second flange 301.

[0040] The redundant connector 800 is detachably connected at both ends to the plate connecting base 200 and the connecting bridge connecting base 300, respectively.

[0041] By tightening the nut 500, the pressure spring 700 is initially compressed. When the first flange 201 and the second flange 301 tend to move closer to each other, the pressure spring 700 is further compressed and deformed, releasing the relative displacement between the first flange 201 and the second flange 301. When the first flange 201 and the second flange 301 tend to move away from each other, the bolt 400 bears tensile load to maintain the connection. The redundant connector 800 does not bear load under normal operating conditions, but provides auxiliary connection protection under extreme overload conditions.

[0042] The connecting device also includes multiple gaskets 600, with one bolt 400 fitted with two gaskets 600, and the first flange 201 and the second flange 301 located between the two gaskets 600.

[0043] Bolt 400, nut 500 and gasket 600 are all made of the same metal material. Gasket 600 is 5-20mm thick and is used to distribute the concentrated load of bolt 400 and nut 500 on the first flange 201 and the second flange 301.

[0044] Both the sheet-connecting base 200 and the connecting bridge connecting base 300 also include a base web and several reinforcing elbow plates.

[0045] The reinforcing elbow plate has a connecting hole. The reinforcing elbow plate of the plate connecting base 200 and the reinforcing elbow plate of the connecting bridge connecting base 300 are correspondingly arranged. The two ends of the redundant connector 800 are connected to the reinforcing elbow plate through the connecting hole.

[0046] The redundant connector 800 includes two U-shaped buckles 801 and multiple high-strength female and male rings 802. The multiple high-strength female and male rings 802 are connected one after the other in sequence, and each of the multiple high-strength female and male rings 802 is connected to a U-shaped buckle 801.

[0047] The 700 compression spring is a cylindrical helical compression spring.

[0048] The first flange 201 and the second flange 301 can undergo translation, lateral rotation, longitudinal rotation, and combinations of the above movements between two planes to adapt to the six-degree-of-freedom motion requirements of the trimaran 100 in waves. Through the deformation of multiple pressure springs 700 to different degrees, a flexible connection between the first flange 201 and the second flange 301 is achieved to avoid the huge load generated by the rigid connection, thereby reducing the connection load.

[0049] A trimaran 100 includes a main hull 101 and two hulls 102, with the two hulls 102 located on opposite sides of the main hull 101. A connecting bridge 103 is fixed to the main hull 101, and both ends of the connecting bridge 103 are connected to the hulls 102 via a trimaran hull relative displacement self-unloading connecting device, as described above. The connecting bridge connecting base 300 of the connecting device is fixedly connected to the connecting bridge 103, and the hull connecting base 200 of the connecting device is fixedly connected to the hulls 102.

[0050] The connecting bridge base 300 is fixedly installed on the outer plate of the connecting bridge 103, and the plate connecting base 200 is fixedly installed on the deck surface of the plate 102.

[0051] When the plate connecting base 200 and the connecting bridge connecting base 300 move relative to each other, the relative displacement between the plate 102 and the main hull 101 is released autonomously through the deformation of the pressure spring 700, thereby effectively reducing the connecting load on the connecting bridge 104 and providing a basis for the lightweight design of the connecting bridge 103. By changing the stiffness of the pressure spring 700, both large and small impact loads transmitted by the connecting structure can be simultaneously met.

[0052] The stiffness difference between the compression spring 700 and the connecting bridge 103 will change the vibration mode of the trimaran 100. The compression spring 700 can absorb the vibration excitation transmitted to the connecting bridge 103 by the sheet connecting base 200, thereby reducing the vibration of the connecting bridge 103 and the main hull 101, which is beneficial to improving the comfort of the trimaran 100.

[0053] When the pressure spring 700 is stretched to a certain limit, the bolt 400 begins to bear the tensile load, which plays an overload protection role; and the connection of the U-shaped buckle 801 and the high-strength female and male rings 802 improves the safety redundancy of the connection device.

[0054] The first flange 201 and the second flange 301 are arranged opposite each other to form a pair of flange faces. Various relative movements can occur between the two flange faces, such as translation, lateral rotation, longitudinal rotation and combined movements between the two planes, which can meet the combined movement requirements of the six degrees of freedom of the ship.

[0055] The structure is simple, with high safety and reliability, and is easy to install and disassemble, making it convenient for inspection and maintenance. It is connected by 400 bolts and 500 nuts.

[0056] The above description is an explanation of this application and not a limitation thereof. The scope of this application is defined by the claims. Within the scope of protection of this application, any form of modification may be made.

Claims

1. A trimaran hull relative displacement self-unloading connection device, applied in a trimaran (100), characterized in that, include: The plate-connecting base (200) includes a first flange (201); The connecting bridge connecting base (300) includes a second flange (301), and the first flange (201) and the second flange (301) are arranged opposite to each other to form a pair of flange faces; Multiple bolts (400) and multiple nuts (500), each bolt (400) passing sequentially through the corresponding bolt holes of the first flange (201) and the second flange (301); each nut (500) is threaded to the end of a bolt (400); Multiple pressure springs (700), each pressure spring (700) is sleeved outside a bolt (400) and located between a first flange (201) and a second flange (301); At least one redundant connector (800) has its two ends detachably connected to the sheet body connecting base (200) and the connecting bridge connecting base (300), respectively; In this process, by tightening the nut (500), the pressure spring (700) generates an initial compression. When the first flange (201) and the second flange (301) tend to move closer to each other, the pressure spring (700) is further compressed and deformed, releasing the relative displacement between the first flange (201) and the second flange (301). When the first flange (201) and the second flange (301) tend to move away from each other, the bolt (400) bears tensile load to maintain the connection. The redundant connector (800) does not bear load under normal working conditions, but provides auxiliary connection protection under extreme overload conditions.

2. The trimaran hull relative displacement self-unloading connection device as described in claim 1, characterized in that: It also includes multiple gaskets (600), a bolt (400) fitted with two gaskets (600), and a first flange (201) and a second flange (301) located between the two gaskets (600).

3. The trimaran hull relative displacement self-unloading connection device as described in claim 2, characterized in that: The bolts (400), nuts (500) and washers (600) are all made of the same metal material. The thickness of the washers (600) is 5-20 mm, which are used to distribute the concentrated load of the bolts (400) and nuts (500) on the first flange (201) and the second flange (301).

4. The trimaran hull relative displacement self-unloading connection device as described in claim 1, characterized in that: Both the sheet-connecting base (200) and the connecting bridge connecting base (300) further include a base web and several reinforcing elbow plates.

5. The trimaran hull relative displacement self-unloading connection device as described in claim 4, characterized in that: The reinforcing elbow plate is provided with a connection hole. The reinforcing elbow plate of the plate connecting base (200) and the reinforcing elbow plate of the connecting bridge connecting base (300) are respectively provided. The two ends of the redundant connector (800) are connected to the reinforcing elbow plate through the connection hole.

6. A trimaran hull relative displacement self-unloading connection device as described in any one of claims 1 or 5, characterized in that: The redundant connector (800) includes two U-shaped buckles (801) and multiple high-strength female and male rings (802). The multiple high-strength female and male rings (802) are connected one after the other in sequence, and each of the multiple high-strength female and male rings (802) is connected to a U-shaped buckle (801).

7. The trimaran hull relative displacement self-unloading connection device as described in claim 1, characterized in that: The compression spring (700) is a cylindrical helical compression spring.

8. The trimaran hull relative displacement self-unloading connection device as described in claim 1, characterized in that: The first flange (201) and the second flange (301) can undergo translation, lateral rotation, longitudinal rotation and combinations of the above movements between two planes to adapt to the six-degree-of-freedom motion requirements of the trimaran (100) in waves. Through the deformation of multiple pressure springs (700) to different degrees, a flexible connection between the first flange (201) and the second flange (301) is achieved to avoid the huge load caused by the rigid connection, thereby reducing the connection load.

9. A trimaran, characterized in that, The trimaran (100) includes a main hull (101) and two hulls (102). The two hulls (102) are located on both sides of the main hull (101). A connecting bridge (103) is fixed on the main hull (101). The two ends of the connecting bridge (103) are connected to the hulls (102) by a trimaran hull relative displacement self-unloading connecting device as described in any one of claims 1-8. The connecting bridge connecting base (300) of the connecting device is fixedly connected to the connecting bridge (103), and the hull connecting base (200) of the connecting device is fixedly connected to the hulls (102).

10. A trimaran as described in claim 9, characterized in that: The connecting bridge base (300) is fixedly installed on the outer plate of the connecting bridge (103), and the plate connecting base (200) is fixedly installed on the deck surface of the plate (102).

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