A multi-buffered anti-impact noise reduction structure for icebreaker bulkheads

Abstract

The invention discloses a multiple buffering anti-impact noise reduction structure for icebreaker bulkheads, comprising two sandwich panels for noise reduction and an anti-impact structure arranged between the two sandwich panels; the anti-impact structure comprises a load-bearing curved plate, a first buffering and resetting structure, a load-bearing buffering support structure, a second buffering and resetting structure and a load-bearing base, the load-bearing and buffering support structure comprises a buffering connecting plate, a compression sleeve connected to the load-bearing panel is arranged at the upper end of the buffering connecting plate, a guide column is arranged at the lower end, and a resetting elastic element connected to the lower sandwich panel is arranged on the guide column; the two ends of the first buffering and resetting structure are respectively pivotally connected to the load-bearing panel and the buffering connecting plate, and the two ends of the second buffering and resetting structure are respectively pivotally connected to the buffering connecting plate and the load-bearing base. The structure can accept the impact force from the outside in a large area and in multiple directions while reducing noise, and effectively alleviate the impact force through multiple shock-absorbing and buffering protective barriers; the structure is reasonable and easy to manufacture, install and maintain.

Description

Technical Field

[0001] The invention relates to a ship bulkhead protection device, in particular to a multi-buffer anti-impact noise reduction structure for an icebreaker bulkhead. Background Art

[0002] With the development of science and technology, people's demand for modern ships has become more extensive. Among them, the operating environment faced by polar icebreakers is extremely harsh. The bow of the ship is easily collided and broken due to the influence of floating ice and tides. What's more, the ship will take on water and run aground, lose its self-propulsion ability, and be in danger of capsizing. The ice belt area on the chord side of the ship will also be impacted and damaged by the drifting ice load during the journey, posing a great hidden danger to the safety of ship operation and the personal safety of crew members. Moreover, the impact load of ice blocks will have a great impact on the normal operation of precision instruments and equipment on the ship. In addition, ship noise will not only cause acoustic and vibration fatigue damage to the structure of ship equipment, but also affect the normal operation of various instruments and equipment in the cabin; for people living in the cabin, it will affect the comfort of the environment at the least, and cause harm to human health at the worst.

[0003] The occurrence of various natural or man-made disasters has posed an extremely severe test to the strength and toughness of the icebreaker bulkheads. Therefore, in the design process of icebreakers in the ice belt area, it is necessary to take into account properties such as impact resistance and noise reduction. At present, polar ship bulkheads basically use multi-layer bulkhead structures, composite structures and sandwich plate structures to protect ships. The Chinese patent with application number CN201811009526.0 discloses a gradual hole impact-resistant ship bulkhead, including two parallel sandwich plates, and a gradual hole impact-resistant structure is provided between the two sandwich plates. Although its impact-resistant structure can offset part of the force after being impacted by external loads, it also causes the structure to lose its fatigue resistance and lose its restoring force after being impacted. It cannot be used reciprocatingly, which undoubtedly causes a significant economic waste. Summary of the invention

[0004] Purpose of the invention: The present invention aims to provide a multi-buffer anti-impact noise reduction structure for the bulkhead of an icebreaker, which can effectively alleviate the impact force and reduce noise and has a long service life.

[0005] Technical solution: The multi-buffer anti-impact noise reduction structure for the icebreaker bulkhead described in the present invention comprises two sandwich panels for noise reduction and an anti-impact structure arranged between the two sandwich panels; the anti-impact structure comprises a load-bearing panel, a first buffer reset structure, a load-bearing buffer support structure, a second buffer reset structure and a load-bearing base, the load-bearing buffer support structure comprises a buffer connecting plate, a compression sleeve is arranged at the upper end of the buffer connecting plate, a guide column is arranged at the lower end, the upper end of the compression sleeve is connected to the load-bearing panel, a reset elastic element is arranged on the guide column, and the lower end of the reset elastic element is connected to the sandwich panel; the two ends of the first buffer reset structure are pivotally connected to the load-bearing panel and the buffer connecting plate respectively, and the two ends of the second buffer reset structure are pivotally connected to the buffer connecting plate and the load-bearing base respectively.

[0006] Preferably, the sandwich panel comprises an upper plate layer and a lower plate layer which are parallel to each other, a bionic honeycomb structure is provided between the upper plate layer and the lower plate layer, and the bionic honeycomb structure is filled with fillers; the bionic honeycomb structure can block air circulation, reduce the conduction of heat and sound waves, has a small honeycomb density and high strength, and is more conducive to resisting external extrusion pressure, thereby having the effects of "anti-compression and anti-fatigue, thermal insulation, sound reduction and noise reduction".

[0007] Preferably, the upper plate layer and the lower plate layer are both 3 mm thick steel plates, the bionic honeycomb structure is made of aluminum, and the filler is porous honeycomb foam aluminum.

[0008] Preferably, the load-bearing panel is square and can receive impact force over a larger area, and the load-bearing panel is made of spring steel.

[0009] Preferably, the compression sleeve comprises a load-bearing pressure rod, a sleeve and a shock-absorbing elastic element arranged in the sleeve, one end of the load-bearing pressure rod is connected to the load-bearing panel, and the other end is connected to the shock-absorbing elastic element.

[0010] Preferably, the first buffer reset structure comprises an elastic connecting rod and a ball head support, one end of the elastic connecting rod is hinged to the load-bearing panel, and the other end is engaged with the ball head support, and the ball head support is connected to the buffer connecting plate.

[0011] Preferably, the second buffer reset structure includes a load-bearing push rod and a ball sleeve, one end of the load-bearing push rod is hinged to the buffer connecting plate, and the other end is connected to the shock-absorbing elastic element arranged in the ball sleeve, and the ball sleeve is connected to the load-bearing base through a ball support.

[0012] Preferably, the load-bearing base is an annular steel ring, which can decompose the impact force to the greatest extent, thereby reducing damage to the hull bulkhead.

[0013] Preferably, the first buffering and restoring structures and the second buffering and restoring structures are respectively provided in a plurality of groups and are evenly distributed in a ring shape, so as to be able to cope with impact forces in various directions.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. It can accept the impact force from the outside world in a large area and in multiple directions, and effectively alleviate the impact force through multiple shock-absorbing and buffering protective barriers; and it can return to its original position after the impact force is released, and has a long service life; 2. The noise-reducing sandwich panel has the effects of compression and fatigue resistance, thermal insulation, sound reduction and noise reduction; 3. The structure is reasonable, and the components can be movably connected, which is convenient for manufacturing, installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a schematic diagram of the impact-resistant structure of the present invention;

[0017] Figure 3 It is a schematic diagram of the sandwich panel structure of the present invention;

[0018] Figure 4 It is a schematic diagram of a first buffer reset structure of the present invention;

[0019] Figure 5 It is a schematic diagram of the load-bearing buffer support structure of the present invention;

[0020] Figure 6 It is a schematic diagram of a second buffer reset structure of the present invention;

[0021] Figure 7 It is a structural schematic diagram of the load-bearing base of the present invention;

[0022] Figure 8 It is a schematic diagram of the structure of the buffer connecting plate of the present invention;

[0023] Fig. 9 It is a front view of the impact-resistant structure of the present invention;

[0024] Fig.10 It is a bottom view of the impact-resistant structure of the present invention. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0026] like Figure 1 As shown in the figure, the multi-buffer anti-impact noise reduction structure for icebreaker bulkheads of the present invention comprises two parallel noise reduction and sound absorbing sandwich panels 1 and an anti-impact structure 2 arranged between the two sandwich panels. Figure 3As shown, the sandwich panel 1 includes an upper plate layer 11 and a lower plate layer 14 which are parallel to each other. The upper plate layer 11 and the lower plate layer 14 are both 3 mm thick steel plates, and a bionic honeycomb structure 12 made of aluminum is arranged between the upper plate layer 11 and the lower plate layer 14. The bionic honeycomb structure 12 is filled with a filler 13, which is porous honeycomb foam aluminum. The upper plate layer 11 and the lower plate layer 14 fit tightly with the bionic honeycomb structure 12 to form a closed "honeycomb panel", which has the functions of sound insulation, shock absorption and heat preservation.

[0027] like Figure 2 , 9 -As shown in FIG. 10, the impact-resistant structure 2 is an "upper circle and lower circle" structure, including a load-bearing panel 21, a first buffering and reset structure 22, a load-bearing and buffering support structure 23, a second buffering and reset structure 24 and a load-bearing base 25; the load-bearing panel 21 is connected to the load-bearing and buffering support structure 23, and the two ends of the first buffering and reset structure 22 are pivotally connected to the load-bearing panel 21 and the buffering connecting plate 234 of the load-bearing and buffering support structure 23, respectively, and the two ends of the second buffering and reset structure 24 are pivotally connected to the buffering connecting plate 234 of the load-bearing and buffering support structure 23 and the load-bearing base 25, respectively.

[0028] like Figure 4 As shown, the first buffer reset structure 22 includes an elastic connecting rod 221 and a ball head support 222. The elastic connecting rod 221 includes a connecting rod, a shock absorbing spring and a ball head rod connected in sequence. The upper end of the connecting rod is hinged to the load-bearing panel 21 through a hole pin, and the lower end of the ball head rod is engaged with the ball head support 222. The ball head support 222 is connected to the buffer connection plate 234. The first buffer reset structure 22 is provided in three groups, which are evenly distributed around the load-bearing buffer support structure 23 in a ring shape to better receive and transmit forces in all directions.

[0029] like Figure 5 As shown, the load-bearing buffer support structure 23 includes a buffer connecting plate 234, a compression sleeve is arranged at the upper end of the buffer connecting plate, and a guide column 235 is arranged at the lower end. The compression sleeve includes a load-bearing pressure rod 231, a sleeve 232 and a shock-absorbing elastic element 233 arranged in the sleeve. One end of the load-bearing pressure rod 231 is connected to the load-bearing panel 21, and the other end is connected to the shock-absorbing elastic element 233. A reset elastic element 236 is arranged on the guide column 235, and the lower end of the reset elastic element 236 is connected to the lower sandwich panel.

[0030] like Figure 6As shown, the second buffer reset structure 24 includes a load-bearing push rod 241, a ball sleeve 242 and a shock-absorbing elastic element 233; one end of the load-bearing push rod 241 is connected to the hole pin of the buffer connecting plate 234, and the other end is connected to the shock-absorbing elastic element 233 arranged in the ball sleeve 242, the ball sleeve 242 is engaged with the ball support 222 and rotates relatively, and the ball support 222 is hinged to the load-bearing base 25. The second buffer reset structure 24 is arranged in 3 groups, each group is arranged with 2, and is evenly distributed around the load-bearing buffer support structure 23.

[0031] The resetting elastic element 236 is a resetting spring, and the shock absorbing elastic element 233 is a shock absorbing spring. Both the shock absorbing spring and the resetting spring are made of high-quality spring steel, and are in a naturally relaxed and uncompressed state during installation. When subjected to external force, the impact-resistant structure is compressed, deformed and absorbs energy; when the external force leaves, the resetting elastic element and the shock absorbing elastic element in the impact-resistant component have the ability to restore the deformation before the force is applied, and can meet the external impact force again.

[0032] like Figure 7 As shown, the load-bearing base 25 is an annular steel ring, which can decompose the impact force to the greatest extent, thereby reducing the damage to the bulkhead.

[0033] The working principle of the present invention is: when the outside of the icebreaker is subjected to impact force, it first acts on the outer sandwich panel. The bionic honeycomb structure 12 and its internal filling 13 in the sandwich panel can block air circulation and reduce the conduction of heat and sound waves. The honeycomb has a small density and high strength, which is more conducive to resisting external extrusion pressure, thereby having the effects of "anti-compression and anti-fatigue, thermal insulation, sound reduction and noise reduction", and forming the first buffer protection barrier while reducing noise.

[0034] Then the load-bearing panel 21 in the impact-resistant structure 2 receives the impact force, which is transmitted to the first buffer reset structure 22 on the one hand and to the load-bearing buffer support structure 23 on the other hand. The three groups of first buffer reset structures 22 arranged in an annular manner can receive impact forces from different directions, expanding the impact receiving area, and the shock-absorbing spring in the elastic connecting rod 221 absorbs and consumes part of the energy of the external impact force through deformation, and transmits it to the buffer connecting plate 234 in the load-bearing buffer support structure 23 through the ball head support 222, serving as the second buffer protection barrier of the impact-resistant structure.

[0035] The load-bearing pressure rod 231 in the load-bearing buffer support structure 23 receives the impact force transmitted by the load-bearing panel 21, and then compresses the shock-absorbing spring 233 arranged in the sleeve 232. The buffer connecting plate 234 simultaneously receives the impact force from the shock-absorbing spring 233 and the first buffer reset structure 22, driving the guide column 235 to compress the reset elastic element 236 to absorb the impact energy, serving as the third buffer protection barrier of the impact-resistant structure.

[0036] The three groups of six second buffer reset structures 24 evenly distributed around the load-bearing buffer support structure 23 receive impact forces from all directions on the buffer connecting plate 234. The load-bearing push rod 241 compresses the shock-absorbing spring 233 in the ball head sleeve 242. The spring can only expand and contract but not bend. The supporting strength is greater, more uniform and more stable, serving as the fourth buffer protection barrier of the impact-resistant structure.

[0037] The circular load-bearing base 25 receives the impact force from the second buffer reset structure 24, decomposes it and transmits it to the sandwich panel on the other side, which reduces shock and noise again, ensuring the reliability of the icebreaker bulkhead structure and achieving good shock absorption, impact resistance and noise reduction effects.

Claims

1. A multi-buffer anti-impact noise reduction structure for icebreaker bulkheads, characterized in that: The invention comprises two sandwich panels (1) for noise reduction and an impact-resistant structure (2) arranged between the two sandwich panels; the impact-resistant structure (2) comprises a load-bearing panel (21), a first buffering and resetting structure (22), a load-bearing buffering support structure (23), a second buffering and resetting structure (24) and a load-bearing base (25); the load-bearing buffering support structure (23) comprises a buffering connecting plate (234); a compression sleeve connected to the load-bearing panel (21) is arranged at the upper end of the buffering connecting plate, and a guide sleeve is arranged at the lower end. The guide column (235) is provided with a reset elastic element (236) connected to the lower sandwich panel; the compression sleeve comprises a load-bearing pressure rod (231), a sleeve (232) and a shock-absorbing elastic element (233) arranged in the sleeve, one end of the load-bearing pressure rod (231) is connected to the load-bearing panel (21), and the other end is connected to the shock-absorbing elastic element (233); the first buffer reset structure (22) has two ends respectively connected to the load-bearing panel (21) and the buffer connection plate (234). ) is pivotally connected, the first buffer reset structure (22) comprises an elastic connecting rod (221) and a ball head support (222), one end of the elastic connecting rod (221) is hinged to the load-bearing panel (21), and the other end is meshed with the ball head support (222), and the ball head support (222) is connected to the buffer connection plate (234); the two ends of the second buffer reset structure (24) are respectively pivotally connected to the buffer connection plate (234) and the load-bearing base (25); the second buffer reset structure ( 24) comprises a load-bearing push rod (241) and a ball sleeve (242); one end of the load-bearing push rod (241) is hinged to the buffer connecting plate (234), and the other end is connected to the shock-absorbing elastic element (233) arranged in the ball sleeve (242); the ball sleeve (242) is connected to the load-bearing base (25) through the ball support (222); the first buffer reset structure (22) and the second buffer reset structure (24) are respectively arranged in a plurality of groups, which are evenly distributed in a ring shape.

2. The multi-buffer anti-impact noise reduction structure according to claim 1 is characterized in that: The sandwich panel (1) comprises an upper plate layer (11) and a lower plate layer (14) which are parallel to each other, and a bionic honeycomb structure (12) is provided between the upper plate layer (11) and the lower plate layer (14), and the bionic honeycomb structure (12) is filled with a filler (13).

3. The multi-buffer anti-impact noise reduction structure according to claim 2 is characterized in that: The upper plate layer (11) and the lower plate layer (14) are both 3 mm thick steel plates.

4. The multi-buffer anti-impact noise reduction structure according to claim 2, characterized in that: The bionic honeycomb structure (12) is made of aluminum, and the filler (13) is porous honeycomb foam aluminum.

5. The multi-buffer anti-impact noise reduction structure according to claim 1, characterized in that: The load-bearing panel (21) is square and made of spring steel.

6. The multi-buffer anti-impact noise reduction structure according to claim 1, characterized in that: The load-bearing base (25) is an annular steel ring.

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