An underwater shock and blast acoustic blanket structure and method of processing the same

Abstract

The application relates to the technical field of acoustic cover layers, and discloses an underwater anti-impact and anti-explosion acoustic cover layer structure and a processing method thereof. The underwater anti-impact and anti-explosion acoustic cover layer structure comprises an inner shell plate, a buffer plate, a sound-absorbing plate, an outer shell plate, a buffer assembly and a plug-in piece. The inner shell plate is a square plate, one side in the length direction and one side in the width direction of the square plate are provided with connecting grooves. The buffer plate, the sound-absorbing plate and the outer shell plate are sequentially and fixedly arranged on one side in the thickness direction of the inner shell plate. A plurality of accommodating holes are formed in the buffer plate, and the sound-absorbing plate is used for absorbing the energy of sound waves. The number of the buffer assemblies is plural, and each buffer assembly is arranged in an accommodating hole. The buffer assembly comprises an energy-absorbing piece. The underwater anti-impact and anti-explosion acoustic cover layer structure and the processing method thereof are characterized in that, through the installation of the buffer assembly, the energy-absorbing piece in the buffer plate and the buffer assembly can effectively weaken the impact on the acoustic cover layer, improve the anti-impact capacity of the equipment, and improve the mechanical performance of the acoustic cover layer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of acoustic cover layer, in particular to an underwater anti-impact and anti-explosion acoustic cover layer structure and a processing method thereof. BACKGROUND

[0002] With the further promotion of the national marine strategy, marine scientific and technological innovation and deep-sea resource development have become the direction of in-depth research and development. It is particularly important to conduct innovative research on the key technologies of underwater vehicles. The research on the vibration and noise reduction technology of underwater vehicles is an important guarantee for smooth communication and safe operation. To ensure the smooth transmission of the underwater vehicle's underwater acoustic communication system at a long distance and high speed, the noise interference of the surface mother ship must be overcome. To avoid anti-submarine equipment and ensure the safety of underwater operation tasks, the self-radiated noise must be suppressed and the target intensity must be reduced. The vibration and noise reduction technology of underwater vehicles has become one of the important topics of marine scientific research.

[0003] Laying an acoustic cover layer on the surface of the underwater vehicle shell is the most convenient and effective way to achieve vibration and noise reduction. The acoustic cover structure is a sound-absorbing structure that covers the surface of the underwater vehicle. The anti-impact ability of the underwater acoustic cover layer structure on the market is poor, and it cannot eliminate the underwater impact in time, which can easily cause damage to the underwater vehicle itself.

[0004] The underwater acoustic cover layer disclosed in CN115547285A has the effect of sound absorption by setting a metal plug-in board, but does not have the effect of shock absorption and vibration reduction. In addition, the existing acoustic cover layer structure has low structural strength, and cracks can easily appear on the surface when it is impacted, greatly reducing the anti-explosion ability of the acoustic cover layer structure. At the same time, the acoustic cover layer structure needs to be assembled by splicing multiple acoustic cover layer structure units when in use. However, a large number of screws and bolts are needed for splicing and assembling the existing acoustic cover layer structure, which is complex to install and disassemble, and has low work efficiency. SUMMARY

[0005] Therefore, the present application provides an underwater anti-impact and anti-explosion acoustic cover layer structure and a processing method thereof. By setting a plug-in piece and a connecting groove on the inner shell plate, the acoustic cover layer can be quickly assembled. At the same time, by setting a buffer plate and a sound-absorbing plate, external sound waves can be effectively absorbed and water flow impact can be buffered, thereby improving the mechanical properties of the acoustic cover layer.

[0006] The technical scheme of the present application is as follows:

[0007] On the one hand, the present application provides an underwater anti-impact and anti-explosion acoustic cover layer structure, which comprises an inner shell plate, a buffer plate, a sound-absorbing plate, an outer shell plate, a buffer assembly and a plug-in piece.

[0008] The inner shell plate is a square plate, one side in the length direction and one side in the width direction of which are provided with connecting grooves;

[0009] The buffer plate, the sound-absorbing plate and the outer shell plate are sequentially stacked and fixed on one side of the inner shell plate in the thickness direction, the buffer plate is provided with a plurality of accommodating holes, and the sound-absorbing plate is used for absorbing the energy of sound waves;

[0010] The number of the buffer assemblies is multiple, and each buffer assembly is arranged in the accommodating hole, the buffer assembly comprises an energy-absorbing piece, the energy-absorbing piece is fixed to the buffer plate and has a deformation capacity, and is used for consuming the energy of external impact;

[0011] The number of the inserting pieces is the same as that of the connecting grooves, and each inserting piece is fixed to the other side in the length direction and the other side in the width direction of the inner shell plate, the inserting pieces on the two sides in the length direction of the inner shell plate are matched with the connecting grooves, and the inserting pieces on the two sides in the width direction of the inner shell plate are matched with the connecting grooves.

[0012] On the basis of the above technical scheme, preferably, a plurality of positioning columns are further included, each positioning column is fixed to one side in the width direction of the inner shell plate, and the other side in the width direction of the inner shell plate is provided with a plurality of matching holes corresponding to the positioning columns.

[0013] On the basis of the above technical scheme, preferably, a guide strip is further included, the guide strip is fixed to the inserting piece in the length direction of the inner shell plate, so that the inserting piece can only slide along the length direction of the connecting groove when the inserting piece is connected with the corresponding connecting groove.

[0014] On the basis of the above technical scheme, preferably, a plurality of honeycomb holes are provided in the sound-absorbing plate, the two ends of the honeycomb hole penetrate the sound-absorbing plate, and the honeycomb hole is used for absorbing noise.

[0015] Further preferably, a plurality of sound-absorbing cones are further included, the sound-absorbing cones are arranged in each honeycomb hole and used for hindering the propagation of sound waves.

[0016] More preferably, a curved surface is arranged on the sound-absorbing cone.

[0017] On the basis of the above technical scheme, preferably, a plurality of sound-absorbing grooves are provided in the other side of the outer shell plate away from the sound-absorbing plate, and the sound-absorbing grooves are arrayed.

[0018] On the basis of the above technical scheme, preferably, the buffer assembly further comprises two fixing pieces, each fixing piece is fixed in the accommodating hole and fixed to the two ends of the energy-absorbing piece.

[0019] On the basis of the above technical scheme, preferably, the buffer plate is a rubber plate.

[0020] In another aspect, a method for processing an underwater shock-resistant and blast-resistant acoustic cover layer structure for producing and assembling the above-mentioned cover layer structure, comprising the following steps:

[0021] S1, an inner shell plate with connecting grooves is made of alloy steel, and the plug-in pieces are welded to both sides of the inner shell plate;

[0022] S2, a receiving hole is formed on the buffer plate, the buffer assembly is installed into the receiving hole, and the buffer plate is fixed to one side in the thickness direction of the inner shell plate using an adhesive;

[0023] S3, the sound-absorbing plate is processed and fixed to the buffer plate using an adhesive;

[0024] S4, the outer shell plate is made of titanium alloy and is fixed to the sound-absorbing plate by an adhesive;

[0025] S5, two cover layer structures are arranged along the length or width direction, and are spliced by the plug-in pieces and the connecting grooves on the opposite sides.

[0026] The underwater shock-resistant and blast-resistant acoustic cover layer structure and the processing method thereof have the following beneficial effects compared with the prior art:

[0027] (1) By installing the buffer assembly, the impact on the acoustic cover layer is effectively reduced by the buffer plate and the energy-absorbing piece in the buffer assembly, the shock resistance of the equipment is improved, and the mechanical properties of the acoustic cover layer are improved. In addition, the splicing and assembly of multiple acoustic cover layers are realized by the plug-in fixing between the plug-in pieces and the connecting grooves, without the need for multiple screw and bolt fixation, and the installation and disassembly efficiency is improved;

[0028] (2) The positioning column is arranged, and a matching hole corresponding to the positioning column is formed on the other side of the inner shell plate in the width direction. In the specific assembly process, two acoustic cover layer structure plates are arranged in the width direction, and when the connecting grooves in the width direction are connected with the plug-in pieces, the corresponding positioning columns are inserted into the matching holes at the same time, improving the connection stability of the side;

[0029] (3) by setting the honeycomb hole and the sound absorption cone, the setting of the honeycomb hole accords with the acoustic principle, the honeycomb hole increases the area of the object contacted when the airflow flows, absorbs the energy therein, and further reduces the noise, and when the sound is transmitted to the sound absorption cone, due to the shape of the sound absorption cone and the arc-shaped inward recess of the side wall, the irregular reflection and scattering of the sound occur, the sound is frequently reflected and scattered through multiple sound absorption cones, thereby increasing the path of the sound wave propagation, enhancing the interaction between the sound wave and the sound absorption cone, reducing the intensity of the noise propagation, achieving the effect of weakening the noise, and meanwhile the sound absorption cone is made of foamed plastic, and the internal pores are rich, and the sound absorption effect is good; (4) by setting the guide strip, due to the shape setting, the guide strip cannot be directly inserted and connected from the length direction of the inner shell plate, and only the guide strip can be aligned with the connecting groove at the corner of one inner shell plate and another inner shell plate, and then slid along the width direction, so that the guide strip is completely inserted into the corresponding connecting groove, and in addition, the trapezoidal part of the guide strip is set to be inconsistent in size at both ends, a gradual plug is formed, and after complete insertion, the guide strip has good connection performance. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0031] Figure 1 It is a perspective view of the underwater shock-resistant and blast-resistant acoustic covering structure of the present application.

[0032] Figure 2 It is an enlarged schematic view of the structure at A in Figure 1

[0033] Figure 3 It is an enlarged schematic view of the structure at B in Figure 1

[0034] Figure 4 It is a side view of the underwater shock-resistant and blast-resistant acoustic covering structure of the present application.

[0035] Figure 5 It is an enlarged schematic view of the structure at C in Figure 4

[0036] Figure 6 It is another side view of the underwater shock-resistant and blast-resistant acoustic covering structure of the present application.

[0037] Figure 7 It is a side view of the inner shell plate of the underwater shock-resistant and blast-resistant acoustic covering structure of the present application. DETAILED DESCRIPTION​​​

[0038] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] like Figures 1-7 As shown, the underwater impact-resistant and explosion-resistant acoustic covering layer structure of the present invention is laid on the surface of the underwater vehicle shell in actual use to achieve the purpose of vibration reduction and noise reduction. The energy carried by sound waves or impacts is usually absorbed by the material and converted into internal energy and then discharged to the outside for consumption. The present acoustic covering layer structure is also based on this principle and specifically includes an inner shell plate 1, a buffer plate 2, a silencer plate 3, an outer shell plate 4, a buffer assembly 5 and a connector 6.

[0040] The inner shell plate 1 is a square plate structure, one side of which in the thickness direction is used to be set on the shell of the aircraft. A connecting groove 11 is provided on one side in the length direction and one side in the width direction of the inner shell plate 1. In this embodiment, the inner shell plate 1 is made of NS312 alloy steel. The density of NS312 alloy steel is 8.4g / cm3, the melting point is 1370-1425℃, the Poisson's ratio v=0.34, and the elastic modulus E=2.1×1011Pa. It has good mechanical stability and impact and burst resistance.

[0041] The buffer plate 2, the muffler plate 3 and the outer shell plate 4 are sequentially stacked and fixed on one side of the inner shell plate 1 in the thickness direction. The buffer plate 2 is provided with a plurality of accommodating holes 21. The muffler plate 3 is used to absorb the energy of sound waves. The buffer plate 2, the muffler plate 3 and the outer shell plate 4 have the same specifications as the inner shell plate 1 in length and width, so that the inner shell plate 1, the buffer plate 2, the muffler plate 3 and the outer shell plate 4 form a complete whole plate after stacking, which is convenient for subsequent assembly.

[0042] The muffler plate 3 is made of polyurethane with a density of 0.1g / cm 3 , elastic modulus E = 1.39 × 10 8 Pa, the loss factor is 0.3, the Poisson's ratio v=0.49, and the sound-absorbing plate 3 is mainly used to absorb sound wave energy and eliminate noise.

[0043] The outer shell plate 4 is made of titanium alloy with a density of 4.4g / cm 3 , elastic modulus E = 1.15 × 10 11 Pa, Poisson's ratio v = 0.33, is used to protect the inner structure. Its stable mechanical properties can withstand greater water pressure and avoid deformation caused by water impact.

[0044] In the embodiment, two reinforcing layers are further included, one of which is arranged between the inner shell plate 1 and the buffer plate 2, and the other is arranged between the outer shell plate 4 and the sound-absorbing plate 3. The reinforcing layer arranged between the inner shell plate 1 and the buffer plate 2 is taken as an example for structural description, which includes beam bars, fixing strips and side blocks. Specifically, three beam bars are uniformly installed on the top of the inner shell plate 1, the beam bars are parallel to each other, arranged along the width direction of the inner shell plate 1 and arranged along the length direction. The fixing strips are fixed on the inner shell plate 1, and the end portions are fixed with one or two of the three beam bars, while the fixing strips are perpendicular to the beam bars and arranged in an array. The side blocks are arranged in a plurality of numbers and symmetrically arranged on both sides of the beam bars, and fixed with the fixing strips on the outer side of the corresponding beam bars.

[0045] Similarly, the reinforcing layer arranged between the outer shell plate 4 and the sound-absorbing plate 3 has the same structure as the above-described reinforcing layer, and the difference is only that the two reinforcing layers are arranged at different positions, but the functions are the same, and are respectively used to increase the structural strength of the inner shell plate 1 and the outer shell plate 4 and improve the anti-violence and impact resistance.

[0046] The number of the buffer assemblies 5 is a plurality, and each is arranged in the accommodating hole 21. The buffer assembly 5 includes an energy-absorbing member 51, which is fixed with the buffer plate 2 and has a deformation capacity, and is used to consume the energy of external impact. When the acoustic cover layer is impacted by external water flow, the impact is transmitted to the buffer plate 2 and the buffer assembly 5 through the interlayer force, and the energy is absorbed and converted by the buffer plate 2 and the buffer assembly 5. The buffer assembly 5 mainly absorbs energy through the energy-absorbing member 51, and converts the energy into internal energy for consumption through the deformation of the energy-absorbing member 51. Specifically, the buffer plate 2 is made of rubber, the density is 1 g / cm 3 , the elastic modulus E = 1.45 x 10 7 Pa, the loss factor is 0.3, and the Poisson's ratio v = 0.495. The buffer plate 2 is made of rubber, which has good energy-absorbing and sound-absorbing effects.

[0047] In the embodiment, the accommodating holes 21 are arranged along the length direction of the buffer plate 2 and completely penetrate the buffer plate 2. A plurality of buffer assemblies 5 can be arranged in a single accommodating hole 21. When a plurality of cover layer structures are assembled, the accommodating holes 21 of different buffer plates 2 are connected to each other, so that the vibration propagation path of the sound wave and the impact force is lengthened, thereby improving the energy-absorbing effect.

[0048] The number of the plug-in members 6 is the same as that of the connecting grooves 11, and each is fixed on the other side in the length direction and the other side in the width direction of the inner shell plate 1. The plug-in members 6 on the two sides in the length direction of the inner shell plate 1 are matched with the connecting grooves 11, and the plug-in members 6 on the two sides in the width direction are matched with the connecting grooves 11.

[0049] In the assembly of two cover layer structures, the inter-plate connection can be directly made through the inner shell plate 1. Specifically, the two inner shell plates 1 are arranged along the length direction or the width direction, and then connected and assembled through the adjacent side connecting grooves 11 and the plug-in pieces 6. In this way, multiple acoustic cover layer structures can be combined and installed on the outer shell of the underwater vehicle to form a complete protection structure.

[0050] As a preferred embodiment, when the connecting grooves 11 and the plug-in pieces 6 are arranged on the inner shell plate 1, the four faces of the inner shell plate 1 in the length and width directions intersect with each other, and the connecting grooves 11 cannot be arranged in the same plane. In order to ensure the stability of the structure, the stress points need to be located at the middle positions of the side faces of the inner shell plate 1. Therefore, one connecting groove 11 is arranged on one side of the inner shell plate 1 in the width direction, and two connecting grooves 11 are arranged on one side of the inner shell plate 1 in the length direction. From the spatial point of view, the connecting groove 11 on one side of the inner shell plate 1 in the width direction is located at the middle of the side face, and is also located between the two connecting grooves 11 on one side of the inner shell plate 1 in the length direction. In addition, considering that if only one connecting groove 11 is arranged on one side in the width direction, the connection stability cannot be guaranteed. Since the thickness of the inner shell plate 1 is limited, three connecting grooves 11 cannot be arranged on the side. Therefore, a plurality of positioning columns 7 are arranged on one side of the inner shell plate 1 in the width direction, and a plurality of matching holes 12 corresponding to the positioning columns 7 are arranged on the other side of the inner shell plate 1 in the width direction. In the specific assembly process, the two acoustic cover layer structure plates are arranged along the width direction, and when the connecting grooves 11 on the width direction are connected with the plug-in pieces 6, the corresponding positioning columns 7 are inserted into the matching holes 12 at the same time, thereby improving the connection stability of the side.

[0051] In addition, on both sides of the inner shell plate 1 in the width direction, only one connecting groove 11 and one plug-in piece 6 are arranged. In order to realize the symmetry of the structure, the positioning columns 7 are arranged at equal intervals along the two sides of the connecting groove 11 or the plug-in piece 6. Similarly, the matching holes 12 are arranged in the same way. In this embodiment, the matching holes 12 and the connecting grooves 11 are located on the same side.

[0052] As a preferred embodiment, in order to realize the length direction positioning in the assembling process and improve the assembly convenience, a guide strip 8 is further arranged, which is fixed on the length direction plug-in part 6 of the inner shell plate 1, so that the plug-in part 6 can only slide along the length direction of the connecting groove 11 when the plug-in part 6 is connected with the corresponding connecting groove 11. The guide strip 8 is composed of two parts, one part is arranged in a trapezoidal shape, and the other part is arranged in a strip shape. The strip part is fixed at the upper bottom position of the trapezoidal part, and the other side of the strip part is fixed with the plug-in part 6. Similarly, the corresponding connecting groove 11 is also matched with the guide strip 8. Due to the shape setting, it cannot be directly inserted and connected from the length direction of the inner shell plate 1, but only one inner shell plate 1 can be slid along the width direction to align the guide strip 8 with the connecting groove 11 at the corner of another inner shell plate 1, so that the guide strip 8 completely enters the corresponding connecting groove 11.

[0053] In addition, when setting, the trapezoidal part of the guide strip 8 is set to be inconsistent in size at both ends to form a gradient plug-in block, which has good connection performance after complete insertion. It should be noted that the smaller side should be inserted into the corresponding connecting groove 11 first.

[0054] Through the above setting, when assembling the plates, the installation direction of each plate is along the width direction of the inner shell plate 1, and has good assembly stability. Especially in the case of two side limiting, the assembled plates will not be loose and dislocated, which is beneficial to the assembly operation.

[0055] In the embodiment, the sound-absorbing plate 3 is provided with a plurality of honeycomb holes 31, both ends of the honeycomb hole 31 penetrating the sound-absorbing plate 3, the honeycomb hole 31 being used for absorbing noise. Specifically, the cross section of the honeycomb hole 31 is a regular hexagon, which is arranged along the width direction of the sound-absorbing plate 3. The honeycomb holes 31 are arranged in an array. Specifically, in the case of limited thickness of the sound-absorbing plate 3, the honeycomb holes 31 are preferably arranged in two layers in the thickness direction of the sound-absorbing plate 3. After the inner shell plate 1 is assembled, the honeycomb holes 31 on the adjacent two sound-absorbing plates 3 form a connected state, so that the sound wave propagation path is lengthened and more effectively absorbed.

[0056] In addition, a plurality of sound-absorbing cones 9 are arranged in each honeycomb hole 31 to hinder the propagation of sound waves, specifically, the sound-absorbing cones 9 are symmetrically arranged, the sound-absorbing cones 9 are in a tapered structure with a large bottom and a small head, and the four side walls of the sound-absorbing cones 9 are recessed to form curved surfaces 91, which is beneficial to save materials, the arrangement of the honeycomb holes 31 conforms to the acoustic principle, the honeycomb holes increase the area of the object contacted by the airflow during the airflow circulation, thereby absorbing the energy therein, and further reducing the noise, and when the sound is transmitted to the sound-absorbing cones 9, due to the shape of the sound-absorbing cones 9 and the arc-shaped recess of the side walls, irregular reflection and scattering of the sound occur, the sound is frequently reflected and scattered by the plurality of sound-absorbing cones 9, thereby increasing the path of the sound wave propagation, enhancing the interaction between the sound wave and the sound-absorbing cones 9, reducing the intensity of the noise propagation, and achieving the effect of reducing the noise, and meanwhile, the sound-absorbing cones 9 are made of foamed plastic, and the internal space is rich, which has the sound-absorbing effect.

[0057] In the embodiment, a plurality of sound-absorbing grooves 41 are arranged on the side of the shell plate 4 away from the sound-absorbing plate 3, specifically, the sound-absorbing grooves 41 are arranged along the width direction of the shell plate 4 and are equidistantly arranged along the length direction of the shell plate 4, the sound-absorbing grooves 41 achieve irregular reflection and scattering of the noise, and achieve the purpose of preliminary noise reduction, and specifically, the cross section of the sound-absorbing grooves 41 is in a circular arc shape.

[0058] In the embodiment, in order to install the energy-absorbing member 51 into the accommodating hole 21, the buffer assembly 5 further comprises two fixing members 52, both of which are fixed in the accommodating hole 21 and are respectively fixed with both ends of the energy-absorbing member 51, the accommodating hole 21 is a square hole, and two rows of fixing members 52 are arranged on each side in the accommodating hole 21, and the energy-absorbing member 51 is arranged at the right angle of the accommodating hole 21 and is fixed with the two fixing members 52 adjacent to the right angle, specifically, the energy-absorbing member 51 can be a spring, and both ends of the spring are arranged on the two fixing members 52 during installation, the fixing members 52 can be directly formed in the accommodating hole 21 or can be installed through subsequent processing, during navigation, the underwater impact and vibration are transmitted to the sound-absorbing plate 3 and then to the buffer plate 2, the impact is transmitted to the energy-absorbing member 51 through the fixing members 52, and the energy-absorbing member 51 is buffered through the elastic force of the energy-absorbing member itself, so that the energy of the external impact is converted into heat energy of the energy-absorbing member 51 and is consumed, which is beneficial to realize the buffering of the acoustic cover layer structure through the buffer assembly 5.

[0059] The underwater anti-impact anti-explosion acoustic cover layer structure processing method of the present application is used for producing and assembling the above-mentioned cover layer structure, and specifically comprises steps S1-S5.

[0060] Step S1: an inner shell plate 1 with a connecting groove 11 is made of alloy steel, and the plug-in members 6 are welded to both sides of the inner shell plate 1.

[0061] Firstly, eight matching holes 12 are evenly opened on one side of the inner shell plate 1 in the width direction, then a connecting groove 11 is opened at the center of the side of the inner shell plate 1, and a plug-in part 6 is installed at the center of the other side of the inner shell plate 1 in the width direction, and a corresponding positioning column 7 is arranged, and two connecting grooves 11 and plug-in parts 6 are arranged on both sides of the inner shell plate 1 in the length direction in the same way. After the inner shell plate 1 is arranged, the corresponding reinforcing layer is installed on the inner shell plate 1, and the installation method can be welding.

[0062] Step S2: Open a containing hole 21 on the buffer plate 2, install the buffer assembly 5 into the containing hole 21, and use an adhesive to fix the buffer plate 2 to one side of the inner shell plate 1 in the thickness direction.

[0063] After the buffer plate 2 is completely manufactured, the adhesive is filled on the reinforcing layer, and the buffer plate 2 is fixed to the inner shell plate 1 by using the adhesive. The adhesive in this step is preferably epoxy resin glue, which has the characteristics of high strength, high toughness and chemical stability, and can ensure the stable adhesion of the buffer plate 2 and the inner shell plate 1.

[0064] Step S3: Process to form the sound-absorbing plate 3, and use an adhesive to fix the sound-absorbing plate 3 to the buffer plate 2.

[0065] Specifically, the honeycomb holes 31 are opened on the sound-absorbing plate 3, and after the opening is completed, the sound-absorbing cones 9 are evenly installed in the honeycomb holes 31, and then the sound-absorbing plate 3 is adhered to the top of the buffer plate 2. The adhesive can be amino silane glue, which has the advantages of strong durability, good weather resistance, and strong adhesion.

[0066] Step S4: The outer shell plate 4 is made of titanium alloy, and the outer shell plate 4 is fixed to the sound-absorbing plate 3 by an adhesive.

[0067] Firstly, the sound-absorbing groove 41 is opened on the outer shell plate 4, and then another reinforcing layer is installed on the outer shell plate 4, and the installation method is the same as that of the inner shell plate 1. After the installation is completed, the outer shell plate 4 is adhered to the top of the sound-absorbing plate 3. The adhesive is pentafluoride glue, which has the advantages of high viscosity, high temperature resistance, vibration resistance, corrosion resistance, and good water resistance, which can avoid the situation that the outer shell plate 4 falls off when it encounters water.

[0068] Step S5: The two cover layer structures are arranged along the length direction or the width direction, and are spliced by the plug-in parts 6 and the connecting grooves 11 on the opposite sides.

[0069] When the two acoustic cover layer structure plates are arranged in the width direction, one plate is pushed to move in the width direction, and the connecting groove 11 in the width direction is connected with the plug-in part 6 on the other plate, and the corresponding positioning column 7 is inserted into the matching hole 12 at the same time, so as to improve the connection stability of the side.

[0070] When two acoustic covering structure plates are arranged along the length direction, one inner shell plate 1 is aligned with the guide strip 8 and the connecting groove 11 at the corner of the other inner shell plate 1, and then the inner shell plate 1 is slid along the width direction, so that the guide strip 8 is completely in the corresponding connecting groove 11.

[0071] In this way, the plurality of acoustic covering structure plates can be arranged and connected to form a completed underwater vehicle acoustic covering protection structure.

[0072] It should be noted that each of the above plates needs to be cut to an appropriate size before processing, and further processing is performed on the cut plate.

[0073] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An underwater impact-resistant and explosion-resistant acoustic covering structure, characterized in that: It comprises an inner shell (1), a buffer plate (2), a muffler plate (3), an outer shell (4), a buffer assembly (5), a connector (6) and a plurality of positioning columns (7), wherein: The inner shell (1) is a square plate, and a connecting groove (11) is provided on one side in the length direction and one side in the width direction; The buffer plate (2), the muffler plate (3) and the outer shell plate (4) are stacked and fixed in sequence on one side of the inner shell plate (1) in the thickness direction. The buffer plate (2) is provided with a plurality of accommodating holes (21). The muffler plate (3) is used to absorb the energy of sound waves. There are multiple buffer components (5), which are respectively arranged in the accommodating holes (21). The buffer components (5) include energy absorbing parts (51). The energy absorbing parts (51) are fixed to the buffer plate (2) and have deformation capability, and are used to consume the energy of external impact. The number of the plug-in connectors (6) is the same as the number of the connecting grooves (11), and the plug-in connectors (6) are respectively fixed on the other side in the length direction and the other side in the width direction of the inner shell (1). The plug-in connectors (6) on both sides in the length direction of the inner shell (1) are adapted to the connecting grooves (11), and the plug-in connectors (6) on both sides in the width direction are adapted to the connecting grooves (11). Each of the positioning columns (7) is fixed on one side of the inner shell plate (1) in the width direction, and a matching hole (12) corresponding to the positioning column (7) is opened on the other side of the inner shell plate (1) in the width direction.

2. The underwater impact-resistant and explosion-resistant acoustic covering structure according to claim 1, characterized in that: It also includes a guide bar (8) fixed on the connector (6) in the length direction of the inner shell (1), so that the connector (6) can only slide along the length direction of the connecting groove (11) when connected to the corresponding connecting groove (11).

3. The underwater impact-resistant and explosion-resistant acoustic covering structure according to claim 1, characterized in that: The muffler plate (3) is provided with a plurality of honeycomb holes (31), both ends of the honeycomb holes (31) pass through the muffler plate (3), and the honeycomb holes (31) are used to absorb noise.

4. The underwater impact-resistant and explosion-resistant acoustic covering structure according to claim 3, characterized in that: It also includes a plurality of silencer cones (9), which are arranged in each honeycomb hole (31) to block the propagation of sound waves.

5. The underwater impact-resistant and explosion-resistant acoustic covering structure according to claim 4, characterized in that: The muffler cone (9) is provided with a curved surface (91).

6. The underwater impact-resistant and explosion-resistant acoustic covering structure according to claim 1, characterized in that: A muffler groove (41) is provided on one side of the outer shell plate (4) away from the muffler plate (3), and the muffler grooves (41) are multiple and arranged in an array.

7. The underwater impact-resistant and explosion-resistant acoustic covering structure according to claim 1, characterized in that: The buffer assembly (5) further comprises two fixing members (52), both of which are fixed in the accommodating hole (21) and respectively fixed to two ends of the energy absorbing member (51).

8. The underwater impact-resistant and explosion-resistant acoustic covering structure according to claim 1, characterized in that: The buffer plate (2) is a rubber plate.

9. A method for processing an underwater impact-resistant and explosion-resistant acoustic covering structure, characterized in that: For producing and assembling the covering structure according to any one of claims 1 to 8, the method comprises the following steps: S1. An inner shell plate (1) having a connection groove (11) is made of alloy steel, and connectors (6) are welded to both sides of the inner shell plate (1); S2. Opening a receiving hole (21) on the buffer plate (2), installing the buffer assembly (5) into the receiving hole (21), and fixing the buffer plate (2) to one side of the inner shell plate (1) in the thickness direction using an adhesive; S3, forming a muffler plate (3) by processing, and fixing the muffler plate (3) to the buffer plate (2) using an adhesive; S4, using titanium alloy to make the outer shell plate (4), and fixing the outer shell plate (4) to the muffler plate (3) by adhesive; S5. Arrange the two covering layer structures along the length direction or the width direction, and splice them together through the connectors (6) and the connecting grooves (11) on the opposite sides.

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