One-way operation pre-tightening sealing connection assembly suitable for split mounting type ship body

Abstract

The invention discloses a one-way operation pre-tightening sealing connection assembly suitable for a split mounting type hull, and the assembly comprises a first sealing seat, a second sealing seat, a third sealing seat, a fourth sealing seat, a fifth sealing seat and a sixth sealing seat, the periphery of the second sealing seat is hermetically welded with the second ship body section, and the second sealing seat is provided with a screw through hole and a limiting end accommodating groove; the anti-drop bolt assembly comprises a limiting end, a screw rod and a pre-tightening nut; during assembly, the limiting end penetrates through the vertical through groove and then is rotated by 90 degrees to be clamped into the transverse through groove, the screw penetrates through the through hole of the second sealing seat, the rotated limiting end is embedded into the limiting end containing groove, and the pre-tightening nut is in threaded fit with the tail end of the screw. According to the assembly, rapid connection is achieved through one-way rotating operation, the limiting end and the containing groove are matched to prevent disengaging, the cross-shaped penetrating installation groove structure simplifies installation steps, sealing welding design is matched, on the premise that the structural strength and the water tightness of a ship body are guaranteed, the splicing efficiency is remarkably improved, and the construction and maintenance cost is reduced; the device has the characteristics of simplicity and convenience in operation, reliability in connection and excellent sealing and anti-falling performance.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, and in particular relates to a sealing connection assembly for one-way pre-tightening of assembled ship hulls. Background Technology

[0002] In modern shipbuilding, modular hull construction has been widely adopted due to its advantages, such as improved production efficiency, reduced transportation costs, and ease of hull section manufacturing and on-site assembly. Modular hulls typically consist of multiple hull sections, which, after manufacturing, need to be transported to a designated location for assembly. The quality of the connections and sealing performance between these hull sections directly affects the structural strength, watertightness, and navigational safety of the entire hull.

[0003] Currently, common methods for connecting ship hull sections mainly include welding and bolting. While welding can achieve high connection strength, it suffers from problems such as complex welding processes, significant susceptibility to operator skill and environmental factors in weld quality, and difficulty in controlling welding deformation. Especially during on-site assembly, welding operations are constrained by space and weather conditions, making construction difficult and ensuring weld quality, which is prone to defects such as porosity, slag inclusions, and cracks. These defects can severely affect the structural strength and watertightness of the hull. Furthermore, once welded connections are completed, disassembly and adjustment are difficult, hindering hull maintenance and modification.

[0004] Bolted connections, as a detachable connection method, overcome some of the drawbacks of welded connections. However, traditional bolted connections also present numerous problems in the jointing of ship hull sections. On the one hand, during ship navigation, ordinary bolted connections are prone to loosening due to the complex external forces such as waves and wind, leading to connection failure and consequently affecting the structural safety of the hull. On the other hand, to ensure the sealing of the connection, sealing gaskets or sealants are usually installed at the bolted joints. However, these sealing measures are prone to aging and damage over long-term use, leading to seal failure and allowing seawater to seep into the hull, causing corrosion and damage to the ship's equipment and structure.

[0005] Furthermore, existing hull section connection assemblies often require complex procedures and numerous tools during installation and disassembly, increasing construction time and costs, and demanding high skill levels from operators. Especially in confined spaces or areas with difficult access, traditional connection assemblies struggle to meet the demands for fast, efficient, and reliable connections.

[0006] Therefore, to address the aforementioned problems with existing hull section connection methods, developing a unidirectional pre-tightening sealing connection assembly suitable for prefabricated hulls is of significant practical importance. This connection assembly should possess characteristics such as ease of operation, reliable connection, good anti-detachment performance, and excellent sealing performance. It should be able to improve the efficiency and quality of hull section assembly while ensuring the structural strength and watertightness of the hull, and reduce construction costs and maintenance difficulties. Summary of the Invention

[0007] To address the problems existing in the prior art, the present invention provides a sealing connection assembly with unidirectional pre-tightening suitable for assembled ship hulls.

[0008] This invention is implemented as follows: a sealing connection assembly for one-way pre-tightening of assembled ship hulls, characterized in that it comprises: a first sealing seat, which is welded to the first ship hull in sections around its perimeter; the first sealing seat has a cross-shaped through-groove, which is composed of vertical through-grooves and horizontal through-grooves that are perpendicularly connected to each other; the vertical through-grooves of the cross-shaped through-groove penetrate the top and bottom surfaces of the first sealing seat, and the horizontal through-grooves are blind grooves; a second sealing seat, which is welded to the second ship hull in sections around its perimeter; the second sealing seat has a through-hole for a screw to pass through, and its end face facing the first sealing seat has a limiting end receiving groove; an anti-loosening bolt assembly, comprising: a limiting end, configured to pass through the vertical through-groove and rotate 90° to engage with the horizontal through-groove; a screw, one end of which is fixedly connected to the limiting end, and the other end of which passes through the through-hole; and a pre-tightening nut, which is threadedly engaged with the end of the screw; wherein, the rotating limiting end is embedded in the horizontal through-groove.

[0009] More preferably, the mating surfaces of the first sealing seat and the second sealing seat are provided with wedge-shaped mating parts that engage with each other, and the inclined surface of the wedge-shaped mating parts extends perpendicularly to the hull splicing direction.

[0010] More preferably, the inclination angle of the wedge-shaped mating part is 5°-15°.

[0011] More preferably, a spacer is also fitted on the screw, which is located between the preload nut and the second sealing seat.

[0012] More preferably, a sealing ring is press-fitted between the spacer and the second sealing seat.

[0013] More preferably, the limiting end is a cuboid structure, the width of which is clearance-fitted with the width of the transverse through groove, and its thickness is less than the width of the vertical through groove.

[0014] More preferably, the vertical through groove of the cross-shaped insertion groove extends through the top and bottom surfaces of the first sealing seat, and the horizontal through groove is a blind groove.

[0015] Advantages and technical effects of the present invention: Compared with the existing through-bolt connection technology, the present invention achieves the following significant technical effects:

[0016] Single-sided operation simplifies the construction process: With the cross-shaped insertion groove and rotating locking design, the bolt assembly only needs to be inserted from the second sealing seat side in one direction and rotated 90° to complete the locking. There is no need for two people to cooperate in the through-hole operation, which improves the construction efficiency by more than 50%, and is especially suitable for splicing scenarios in narrow compartments or accessible from one side.

[0017] The dual anti-loosening structure enhances reliability: the mechanical engagement of the limiting end and the transverse through groove, combined with the depth difference design of the limiting end receiving groove, forms a dual anti-loosening mechanism of structural limiting and elastic pre-tightening, effectively resisting the risk of bolt loosening caused by long-term ship vibration, and significantly enhancing the vibration resistance performance compared with traditional through bolt connections.

[0018] Dynamic sealing performance optimization: The inclined structure of the wedge-shaped mating part generates radial compression sealing force under the action of pre-tightening force, while allowing the axial displacement of the hull to adaptively adjust the sealing pressure, avoiding interface separation. Compared with the traditional planar sealing structure, it is more adaptable to dynamic working conditions under wave loads, and the sealing stability is significantly improved.

[0019] The redundant sealing design enhances water tightness: the sealing cover covers the welding area between the first sealing seat and the hull, and the secondary sealing barrier combined with the spacer and sealing ring effectively blocks the seawater seepage path along the bolt axis. It is more reliable in terms of water tightness than the traditional single-layer sealing structure, and is especially suitable for highly corrosive marine environments.

[0020] The assembly error-tolerant design reduces construction difficulty: the clearance fit design between the limiting end and the vertical through groove (width difference ≥1mm) eliminates the need for precise alignment when inserting bolts, improves the assembly error tolerance rate, and significantly reduces the requirements for operational precision during on-site construction. Attached Figure Description

[0021] Figure 1 This is the front view of the present invention;

[0022] Figure 2 yes Figure 1 The right view;

[0023] Figure 3 yes Figure 1 Sectional view of AA;

[0024] Figure 4 yes Figure 2 BB section view;

[0025] Figure 5 and Figure 6 This is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 7 This is an exploded view of the invention;

[0027] Figure 8 This is a schematic diagram of the three-dimensional structure of the first sealing seat;

[0028] Figure 9 and Figure 10 This is a schematic diagram of the second sealing seat structure;

[0029] Figure 11 This is a schematic diagram of the integrated design structure of the limiting end and the screw;

[0030] Figure 12 This is a schematic diagram of the structure in use of the present invention.

[0031] In the figure, 1 is the first sealing seat; 101 is the wedge-shaped mating part; 101a is the vertical through groove; 101b is the horizontal through groove; 2 is the second sealing seat; 201 is the through hole; 202 is the limiting end receiving groove; 3 is the anti-loosening bolt assembly; 301 is the limiting end; 302 is the screw; 303 is the preload nut; 304 is the spacer; 305 is the sealing ring; 4 is the sealing cover; 5 is the first hull section; 6 is the second hull section. Detailed Implementation

[0032] 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. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0033] Please see Figures 1 to 12 A sealing connection assembly for one-way pre-tightening of assembled ship hulls includes: a first sealing seat 1, which is sealed and welded to the first hull section 5 around its perimeter; the first sealing seat 1 has a cross-shaped through groove 101, which is composed of a vertical through groove 101a and a horizontal through groove 101b that are perpendicularly connected to each other; the vertical through groove 101a of the cross-shaped through groove 101 penetrates the top and bottom surfaces of the first sealing seat 1, and the horizontal through groove 101b is a blind groove;

[0034] The second sealing seat 2 is sealed and welded to the second hull section 6 around its perimeter. The second sealing seat 2 is provided with a through hole 201 for the screw to pass through, and its end face facing the first sealing seat 1 is provided with a limiting end receiving groove 202.

[0035] A sealing cover 4 is also welded to the hull section on the side of the first sealing seat 1. The sealing cover completely covers the first sealing seat, so that there will be no leakage on the side of the hull section.

[0036] The anti-loosening bolt assembly 3 includes: a limiting end 301, configured to pass through the vertical through groove 101a and then rotate 90° to engage with the horizontal through groove 101b; a screw 302, one end of which is fixedly connected to the limiting end 301, and the other end of which passes through the through hole 201; and a preload nut 303, which is threadedly engaged with the end of the screw 302; wherein, after rotation, the limiting end 301 is embedded in the horizontal through groove 101b.

[0037] The cross-shaped insertion groove 101 and the limiting end 301 are designed to rotate and engage, enabling locking through a single-direction operation (simply insert the integrated screw from the second sealing seat side beforehand), significantly improving the construction efficiency in narrow compartments. The design of the limiting end receiving groove 202 with a depth less than the thickness of the limiting end 301 ensures that the limiting end is not fully embedded in the groove after rotation, forming a positioning fit with the vertical through groove 101a on the first sealing seat, facilitating smooth insertion into the vertical through groove 101a. At the same time, it forms a dual anti-loosening mechanism with the transverse through groove 101b, solving the risk of bolt loosening caused by ship vibration. The sealing seat and the hull are welded in sections to ensure overall sealing, achieving integrated anti-loosening and sealing.

[0038] Preferably, the mating surfaces of the first sealing seat 1 and the second sealing seat 2 are provided with interlocking wedge-shaped mating portions 101, the inclined extension direction of which is perpendicular to the hull splicing direction. The inclined meshing structure of the wedge-shaped mating portion 101 generates radial compression sealing force under preload, compensating for hull section manufacturing errors; the inclined extension direction is perpendicular to the splicing direction, allowing the axial displacement of the hull under wave impact to adaptively adjust the sealing pressure, preventing interface separation and leakage, and improving dynamic sealing reliability.

[0039] More preferably, the inclination angle of the wedge-shaped mating part 101 is 5°-15°. Too small an inclination angle (<5°) makes it easy to self-lock but difficult to disassemble, while too large an inclination angle (>15°) weakens the radial sealing force; the preferred angle allows the nut preload to be efficiently converted into wedge-shaped surface clamping force, while ensuring that the inclination does not slip or fail under vibration.

[0040] More preferably, a spacer 304 is also fitted onto the screw 302, and the spacer 304 is located between the preload nut 303 and the second sealing seat 2. The spacer 304 disperses the end face pressure of the preload nut 303 on the second sealing seat 2, avoiding local deformation and damage to the sealing surface; its rigid support function prevents the nut from loosening during vibration and improves the long-term connection stability.

[0041] More preferably, a sealing ring 305 is press-fitted between the spacer 304 and the second sealing seat 2. The sealing ring 305, under pressure, fills the microscopic gap between the spacer 304 and the second sealing seat 2, forming a secondary sealing barrier to block the axial seepage path of seawater along the screw 302, especially to deal with micro-leakage at the interface caused by hull deformation.

[0042] Preferably, the limiting end 301 is a cuboid structure, the width of which is clearance-fitted with the width of the transverse through groove 101b, and its thickness is less than the width of the vertical through groove 101a. The cuboid structure of the limiting end 301 and the transverse through groove 101b with a clearance fit (0.1-0.3mm) ensure no shaking or jamming after rotation; the design that the thickness is less than the width of the vertical through groove 101a (difference ≥1mm) eliminates the need for precise alignment during insertion, improving the assembly error tolerance.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sealing connection assembly for one-way pre-tightening of assembled ship hulls, characterized in that, include: The first sealing seat (1) is welded to the first hull section around its perimeter. The first sealing seat (1) is provided with a cross-shaped through groove (101). The cross-shaped through groove (101) is composed of a vertical through groove (101a) and a horizontal through groove (101b) that are perpendicularly connected to each other. The vertical through groove (101a) of the cross-shaped through groove (101) penetrates the top and bottom surfaces of the first sealing seat (1), and the horizontal through groove (101b) is a blind groove. The second sealing seat (2) is sealed and welded to the second hull section around its perimeter. The second sealing seat (2) is provided with a through hole (201) for the screw to pass through, and its end face facing the first sealing seat (1) is provided with a limiting end receiving groove (202). Anti-loosening bolt assembly (3), comprising: The limiting end (301) is configured to pass through the vertical through groove (101a) and then rotate 90° to engage with the horizontal through groove (101b); The screw (302) has one end fixedly connected to the limiting end (301) and the other end passing through the through hole (201); The preload nut (303) is threaded to the end of the screw (302); The rotated limiting end (301) is embedded in the transverse through groove (101b).

2. The sealing connection assembly for one-way pre-tightening of assembled hulls according to claim 1, characterized in that: The mating surfaces of the first sealing seat (1) and the second sealing seat (2) are provided with wedge-shaped mating parts (101) that mesh with each other, and the inclined surface of the wedge-shaped mating part (101) extends perpendicularly to the hull splicing direction.

3. The sealing connection assembly for one-way pre-tightening of assembled hulls according to claim 2, characterized in that: The inclined surface angle of the wedge-shaped mating part (101) is 5°-15°.

4. The sealing connection assembly for one-way pre-tightening of assembled hulls according to claim 1, characterized in that: The screw (302) is also fitted with a spacer (304), which is located between the preload nut (303) and the second sealing seat (2).

5. The sealing connection assembly for one-way pre-tightening of assembled hulls according to claim 4, characterized in that: A sealing ring (305) is press-fitted between the spacer (304) and the second sealing seat (2).

6. The sealing connection assembly for one-way pre-tightening of assembled hulls according to any one of claims 1-5, characterized in that: The limiting end (301) is a cuboid structure, the width of which is in clearance fit with the width of the transverse through groove (101b), and its thickness is less than the width of the vertical through groove (101a).

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