Multi-channel underwater acoustic signal acquisition sealed cabin

Abstract

The utility model relates to the field of watertight compartments, in particular to a multichannel underwater acoustic signal acquisition sealed compartment, which comprises a compartment body, a compartment cover, a sealing ring, an acquisition module and a stuffing box. A cabin cover covers the cabin body, and a sealing ring is arranged at the joint of the cabin body and the cabin cover to prevent water. The cabin body and the cabin cover are both designed to be polygonal, a plurality of hydrophone installation interfaces are evenly distributed on a plurality of vertical faces of the cabin body, and hydrophone cables are connected to an acquisition module inside the cabin body through stuffing boxes installed on the hydrophone installation interfaces. The multichannel underwater acoustic signal acquisition sealed cabin provided by the utility model can avoid the problems of water leakage, structural deformation and the like under the water pressure of 3Mbar, and ensures the normal work of the acquisition module in the cabin body. Meanwhile, the device has the advantages of multiple channels, small size, high pressure resistance, good waterproofness and the like, and effectively solves the problems of low data precision and low data reliability caused by insufficient channels or insufficient diving depth of the collection sealed cabin.

Description

Technical Field

[0001] The utility model relates to the field of watertight cabins, and particularly to a multi-channel underwater acoustic signal acquisition sealed cabin. Background Art

[0002] The ocean contains rich biological resources and mineral resources, which are crucial for the future survival and sustainable development of mankind. Understanding the ocean is the prerequisite for developing and protecting the ocean, and it depends on the development of underwater detection and sensing equipment. Ocean development faces challenges from complex and variable underwater environmental factors, and high-level underwater technical equipment is urgently needed as support.

[0003] Existing deep-water underwater acoustic detection equipment faces many challenges, among which the most important ones are the problems of pressure resistance and waterproof sealing. In the prior art, underwater acoustic detection equipment generally has a large volume and an oval overall structure, which is not conducive to setting more acquisition channels on it and is difficult to manufacture, resulting in a small number of collected data and low reliability of data result analysis. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] The utility model provides a multi-channel underwater acoustic signal acquisition sealed cabin, aiming to solve the problems of low data accuracy and low data reliability caused by insufficient channels or insufficient diving depth in the existing underwater acoustic acquisition process.

[0006] (2) Technical Solutions

[0007] In order to achieve the above object, the main technical solutions adopted by the utility model include:

[0008] A multi-channel underwater acoustic signal acquisition sealed cabin includes a cabin body, a cabin cover, a sealing ring, an acquisition module, and a stuffing box. The cabin cover is arranged above the cabin body, and a sealing ring for waterproofing is padded between them. The acquisition module is fixed in the chamber formed by the cabin body and the cabin cover.

[0009] The outer part of the cabin body has a plurality of vertical surfaces, and a plurality of hydrophone installation interfaces are evenly arranged on each vertical surface. A plurality of stuffing boxes are installed corresponding to the plurality of hydrophone installation interfaces one by one; the hydrophone communication cables pass through the centers of the stuffing boxes and are connected to the acquisition module to realize multi-channel underwater acoustic acquisition.

[0010] Further technical solutions lie in that the cabin body has eight vertical surfaces. The upper part of the vertical surface has a flange, and the outer contour of the cross-section of the flange is an octagon. The outer contour of the cross-section of the cabin cover is the same octagon; the flange and the cabin cover are closely attached and connected by connecting pieces. One of the eight vertical surfaces is provided with the power supply and communication interfaces of the acquisition module, and one of the remaining seven vertical surfaces is provided with a pressure sensor installation interface.

[0011] A further technical solution lies in that the sealing ring is installed in the sealing ring installation groove opened on the upper surface of the cabin body.

[0012] A further technical solution lies in that the shape of the chamber is cylindrical, and a radiator for dissipating heat from the acquisition module is also arranged in the chamber. The radiator is a water-cooled radiator and is fixedly connected above the data processing unit of the acquisition module.

[0013] A further technical solution lies in that the stuffing box includes a tightening nut, a stuffing box body, a seal, a first flat gasket and a second flat gasket;

[0014] The stuffing box body is provided with a stepped through hole that runs through from top to bottom and is larger at the top and smaller at the bottom, and the large-diameter part is provided with internal threads. Inside the stepped through hole, a first flat gasket, a seal and a second flat gasket are arranged in sequence from bottom to top. The first flat gasket is located at the step of the stepped through hole. The tightening nut is screwed into the internal threads to successively compress the second flat gasket, the seal and the first flat gasket;

[0015] The outer contour of the upper part cross-section of the stuffing box body is hexagonal, and the outer contour of the lower part cross-section is circular and is provided with external connection threads on the outside for connecting the hydrophone installation interface on the cabin body.

[0016] A further technical solution lies in that the tightening nut, the seal, the first flat gasket and the second flat gasket are all provided with inner holes along the central axis for passing through the hydrophone communication cable.

[0017] A further technical solution lies in that a tapered chamfer is arranged on the outside of the inner hole of the tightening nut to protect the hydrophone communication cable.

[0018] A further technical solution lies in that a tetrafluoroethylene flange gasket is installed between the stuffing box and the cabin body.

[0019] A further technical solution lies in that both the cabin body and the cabin cover are made of 7075 aluminum alloy material.

[0020] (III) Beneficial effects

[0021] The beneficial effects of the present utility model are as follows: The side wall of the cabin body of the present utility model adopts a multi-faceted design, with a simple structure, strong pressure resistance and light weight. At the same time, it has a relatively large internal space for accommodating the acquisition module. Secondly, it is easier to machine holes on a flat surface, which can facilitate the arrangement of multiple hydrophone installation interfaces, thereby collecting more data and improving the accuracy of the data and the reliability of the data analysis results. Finally, the split-type stuffing box that applies pressure to the seal can not only play a better waterproof and sealing role, but also be more convenient to assemble. Description of the drawings

[0022] Figure 1 It is a schematic diagram of the complete structure of a multi-channel underwater acoustic signal acquisition sealed cabin;

[0023] Figure 2 Overall structural schematic diagram of another perspective of the multi-channel underwater acoustic signal acquisition sealed cabin;

[0024] Figure 3 Top view of the multi-channel underwater acoustic signal acquisition sealed cabin with the hatch open;

[0025] Figure 4 Explosion schematic diagram of the multi-channel underwater acoustic signal acquisition sealed cabin;

[0026] Figure 5 Schematic diagram of the installation positions of the cabin body and the stuffing box;

[0027] Figure 6 Explosion schematic diagram of the stuffing box;

[0028] Figure 7 Schematic diagram of the completely assembled stuffing box.

[0029]

Explanation of the reference numerals

[0030] 1: Cabin body; 11: Hydrophone installation interface; 12: Flange; 13: Sealing ring installation groove; 14: Power supply and communication interface; 15: Pressure sensor installation interface;

[0031] 2: Hatch; 3: Sealing ring; 4: Acquisition module;

[0032] 5: Stuffing box; 51: Compression nut; 52: Stuffing box body; 53: Sealing element; 54: First flat gasket; 55: Second flat gasket;

[0033] 6: Connecting piece;

[0034] 7: Teflon flange gasket. Detailed implementation manners

[0035] In order to better explain the present utility model for easy understanding, the present utility model will be described in detail below with reference to the accompanying drawings through specific implementation manners.

[0036] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0037] In addition, in the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] In the present utility model, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] The present utility model provides a multi-channel underwater acoustic signal acquisition sealed cabin, as Figures 1 - 5 shown, which includes a cabin body 1, a cabin cover 2, a sealing ring 3, an acquisition module 4, and a stuffing box 5.

[0040] Specifically, the cabin cover 2 is covered above the cabin body 1 and a sealing ring 3 for waterproofing is padded between them. The acquisition module 4 is fixed in the chamber formed by the enclosure of the cabin body 1 and the cabin cover 2. The outside of the cabin body 1 has eight vertical surfaces, and a plurality of hydrophone installation interfaces 11 are evenly arranged on each vertical surface. 64 stuffing boxes 5 are installed corresponding to 64 hydrophone installation interfaces 11 one by one; the hydrophone communication cables pass through the centers of the stuffing boxes 5 and are connected to the acquisition module 4 to achieve 64-channel underwater acoustic acquisition.

[0041] In this embodiment, both the cabin body 1 and the cabin cover 2 are made of 7075 aluminum alloy. 7075 aluminum alloy has good impact resistance and watertightness, which is sufficient to ensure the safety of the multi-channel underwater acoustic signal acquisition components in the cabin when working underwater. Specifically, the virtual circumscribed circle diameter of the outer contour of the cabin body 1 is 230 mm, the wall thickness at the thinnest part of the cabin body 1 is 8 mm, the virtual circumscribed circle diameter of the outer contour of the cabin cover 2 is 280 mm, and the wall thickness of the cabin cover 2 is 8 mm. The sealing ring 3 is made of nitrile rubber. Nitrile rubber has characteristics such as high hardness, non-rusting, non-deforming, wear-resistant and corrosion-resistant. Specifically, the outer diameter of the sealing ring 3 is 240 mm and the cross-sectional diameter is 5 mm.

[0042] In this embodiment, the upper part of the cabin body 1 (or understood as the top of the vertical surface) has a flange 12. The outer contour of the cross-section of the flange 12 is an octagon, and the outer contour of the cross-section of the cabin cover 2 is the same octagon; the flange 12 and the cabin cover 2 are closely attached and connected by a connecting member 6.

[0043] In this embodiment, the connecting member 6 is a round head socket head cap screw, preferably 16 high-strength alloy steel screws of grade 12.9 firmly fix the cabin body 1 and the cabin cover 2 together.

[0044] In this embodiment, the sealing ring 3 is installed in the sealing ring installation groove 13 opened on the upper surface of the cabin body 1. The existence of the sealing ring installation groove 13 can effectively ensure the correct installation position of the sealing ring 2 during the installation process. After the cabin body 1 and the cabin cover 2 are pressed tightly, the sealing effect is better.

[0045] Specifically, the width of the sealing ring installation groove 13 is 6 mm, the depth is 1.9 mm, and the diameter is 230 mm.

[0046] In this embodiment, the power supply and communication interface 14 of the acquisition module 4 is provided on one of the eight vertical surfaces, and the pressure sensor installation interface 15 is provided on one of the remaining seven vertical surfaces. Specifically, the power supply and communication interface 14 can continuously provide the electric energy required for the operation of the acquisition module 4 and can also transmit the result of data processing to the water surface. A pressure sensor is installed on the pressure sensor installation interface 15 to sense the underwater pressure and calculate the diving depth.

[0047] In this embodiment, 66 installation interfaces are designed on the cabin body, including 64 hydrophone installation interfaces 11, 1 power supply and communication interface, and 1 pressure sensor installation interface. The layout of the 66 installation interfaces is as follows:

[0048] Among the eight vertical surfaces of the cabin body 2, 8 hydrophone installation interfaces 11 are evenly distributed on 5 vertical surfaces, 9 hydrophone installation interfaces 11 are distributed on 1 vertical surface, 7 hydrophone installation interfaces and 1 power supply and communication interface 14 are distributed on 1 vertical surface, and 8 hydrophone installation interfaces 11 and 1 pressure sensor installation interface 15 are distributed on 1 vertical surface. The hydrophone installation interface 11 is preferably an M8*1.0 thread, and the bottom hole has a diameter of 7 mm.

[0049] In this embodiment, the shape of the chamber is cylindrical, and the inner wall formed by the cylindrical chamber has good compressive resistance. The form of the inscribed circle of the polygon can make better use of the internal space and provide a large installation and heat dissipation space for the acquisition module 4.

[0050] A radiator for dissipating heat from the acquisition module 4 is also provided in the chamber. The radiator is a water-cooled radiator, and of course, it can also be an air-cooled radiator. The radiator is fixedly connected above the data processing unit of the acquisition module 4.

[0051] As Figures 6 - 7 shown, in this embodiment, the stuffing box 5 includes a compression nut 51, a stuffing box body 52, a seal 53, a first flat washer 54, and a second flat washer 55;

[0052] The stuffing box body 52 is provided with a stepped through hole that penetrates along the axis and is larger at the top and smaller at the bottom, and the large-diameter part is provided with internal threads. Inside the stepped through hole, a first flat gasket 54, a seal 53, and a second flat gasket 55 are sequentially arranged from bottom to top. The first flat gasket 54 is located at the step of the stepped through hole. The tightening nut 51 is screwed into the internal threads to successively compress the second flat gasket 55, the seal 53, and the first flat gasket 54.

[0053] The outer contour of the upper cross-section of the stuffing box body 52 is hexagonal, and the outer contour of the lower cross-section is circular and is provided with external connection threads on the outside for connecting to the hydrophone installation interface 11 on the cabin body 1.

[0054] The tightening nut 51, the seal 53, the first flat gasket 54, and the second flat gasket 55 are all provided with internal holes along the central axis for passing the hydrophone communication cable. A tapered chamfer is provided on the outside of the internal hole of the tightening nut 51 to protect the hydrophone communication cable. A tetrafluoroethylene flange gasket 7 is installed between the stuffing box 5 and the cabin body 1.

[0055] Specifically, the number of stuffing boxes 5 is 64, corresponding to 64 hydrophone installation interfaces 11. The central aperture of the tightening nut 51 is 5 mm, the nut body is designed with M8*1.0 threads, the central holes of the first flat gasket 54 and the second flat gasket 55 are 5 mm, the thickness is 1 mm, the central aperture of the seal 53 is 5 mm, the outer diameter is 8 mm, the thickness is 3 mm, the height is 6 mm, and the material is rubber. The outer diameter of the upper part of the stuffing box body 52 is 13.3 mm, and the internal threads on the inner surface of the upper hole are M8*1.0; the lower part is M8*1.0 external threads.

[0056] It should be understood that the above description of the specific embodiments of the present invention is only for explaining the technical route and features of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the above specific embodiments. Any changes or modifications made within the scope of the claims of the present invention should be covered by the protection scope of the present invention.

Claims

1. A multi-channel underwater acoustic signal acquisition sealed cabin, comprising a cabin body (1), a cabin cover (2), a sealing ring (3), an acquisition module (4) and a stuffing box (5), characterized in that: The cabin body (1) is covered with the cabin cover (2) and a sealing ring (3) for waterproofing is provided between the cabin body (1) and the cabin cover (2); the collection module (4) is fixed in a chamber enclosed by the cabin body (1) and the cabin cover (2); The cabin (1) has a plurality of facades on the outside, and a plurality of hydrophone installation interfaces (11) are evenly arranged on each of the facades; a plurality of stuffing boxes (5) are installed one by one corresponding to the plurality of hydrophone installation interfaces (11); a hydrophone communication cable passes through the center of the stuffing box (5) and is connected to the collection module (4) to realize multi-channel water sound collection.

2. The multi-channel underwater acoustic signal acquisition sealed cabin according to claim 1, characterized in that: The cabin body (1) has eight facades, and a flange (12) is provided on the top of each facade. The cross-sectional outer contour of the flange (12) is an octagon, and the cross-sectional outer contour of the hatch cover (2) is the same octagon. The flange (12) and the hatch cover (2) are tightly fitted and connected via a detachable connector (6).

3. The multi-channel underwater acoustic signal acquisition sealed cabin according to claim 2, characterized in that: One of the eight facades is provided with a power supply and communication interface (14) of the acquisition module (4), and one of the remaining seven facades is provided with a pressure sensor installation interface (15).

4. The multi-channel underwater acoustic signal acquisition sealed cabin according to claim 1, characterized in that: The sealing ring (3) is installed in a sealing ring installation groove (13) provided on the upper surface of the cabin body (1).

5. The multi-channel underwater acoustic signal acquisition sealed cabin according to claim 1, characterized in that: The chamber is cylindrical in shape, and a radiator for dissipating heat for the acquisition module (4) is also provided in the chamber. The radiator is a water-cooled radiator fixedly connected above the data processing unit of the acquisition module (4).

6. The multi-channel underwater acoustic signal acquisition sealed cabin according to claim 1, characterized in that: The stuffing box (5) comprises a locking nut (51), a stuffing box body (52), a sealing member (53), a first flat washer (54) and a second flat washer (55); The stuffing box body (52) is provided with a stepped through hole which is larger at the top and smaller at the bottom and passes through the main body along the axis, and the large diameter portion is provided with an internal thread, and the stepped through hole is provided with a first flat washer (54), a sealing member (53) and a second flat washer (55) in sequence from bottom to top, the first flat washer (54) is located at the step of the stepped through hole, and the locking nut (51) is screwed into the internal thread to successively press the second flat washer (55), the sealing member (53) and the first flat washer (54); The upper cross-sectional outer contour of the stuffing box body (52) is hexagonal, and the lower cross-sectional outer contour is circular and is provided with an external connection thread on the outside for connecting to the hydrophone installation interface (11) on the cabin (1).

7. The multi-channel underwater acoustic signal acquisition sealed cabin according to claim 6, characterized in that: The clamping nut (51), the sealing element (53), the first flat washer (54) and the second flat washer (55) are all provided with an inner hole along the central axis for passing the hydrophone communication cable.

8. The multi-channel underwater acoustic signal acquisition sealed cabin according to claim 6, characterized in that: A conical chamfer is arranged on the outer side of the inner hole of the clamping nut (51) to protect the hydrophone communication cable.

9. The multi-channel underwater acoustic signal acquisition sealed cabin according to claim 1, characterized in that: A polytetrafluoroethylene flange gasket (7) is installed between the stuffing box (5) and the cabin body (1).

10. The multi-channel underwater acoustic signal acquisition sealed cabin according to claim 1, characterized in that: The cabin body (1) and the cabin cover (2) are both made of 7075 aluminum alloy.

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