Rapidly-packaged piezoelectric circular tube hydrophone and manufacturing method thereof

Abstract

The invention provides a rapidly-packaged piezoelectric circular tube hydrophone and a manufacturing method thereof, the rapidly-packaged piezoelectric circular tube hydrophone comprises a piezoelectric hydrophone and a pre-amplification device, the piezoelectric hydrophone comprises an injection molding type polyurethane coating layer, a piezoelectric ceramic circular tube and a base, and the outer side of the piezoelectric ceramic circular tube is sleeved with a shielding ring; the injection molding type polyurethane coating layer completely coats the hydrophone upper end cover, the piezoelectric ceramic circular tube, the shielding ring, the hydrophone lower end cover and the joint of the hydrophone lower end cover and the base; the front placing device comprises an outer cylinder body and a front placing cylinder body, and heat conduction pouring sealant is arranged between the outer cylinder body and the front placing cylinder body. According to the invention, automatic packaging of the piezoelectric ceramic circular tube hydrophone is realized through an injection molding technology, the problem of foams is solved, the packaging efficiency is improved, and the consistency of the piezoelectric ceramic circular tube hydrophone is improved; the shielding ring is used for replacing an original shielding layer made of glass cloth and conductive adhesive, so that the consistency of materials is improved, and the manufacturing technology of the hydrophone is optimized; by means of the heat conduction pouring sealant, air cavities between the shells are reduced, and the heat conduction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrophones, and in particular to a rapid packaging piezoelectric circular tube hydrophone and a manufacturing method thereof. Background Art

[0002] The hydrophone is the core equipment for underwater acoustic detection and communication. It converts the acoustic signal generated by underwater pressure changes into a processable electrical signal, and then reasonably analyzes the underwater target situation to achieve underwater target detection, environmental analysis and information extraction. With the continuous development of science and technology in recent years, new materials, new structures and new technologies suitable for underwater use are constantly emerging. In addition, marine resource exploration, underwater target imaging, fish finders and even sonar equipment have put forward wide bandwidth, high sensitivity, low noise and high reliability requirements for hydrophones.

[0003] Hydrophones can be divided into curved disc type, thin plate bending vibration type and circular tube radial vibration type according to their working modes. Among them, the circular tube piezoelectric hydrophone is still the most widely used mode because it has the advantages of excellent pressure resistance, horizontal non-directionality, high receiving sensitivity and strong operability.

[0004] Chinese patent CN201210404940.0 "A small piezoelectric hydrophone resistant to high hydrostatic pressure and its manufacturing method" describes a hydrophone composed of two piezoelectric round tubes with opposite polarization directions, high-strength polyurethane, flexible rubber plugging, positioning ring, two thin wires, etc. This hydrophone has a simple structure, is easy to form, and has strong pressure resistance. However, its integration is low and its sensitivity cannot be enhanced.

[0005] Chinese patent CN201520797535.6 "Deep-water High-sensitivity Circular Tube Hydrophone" describes a hydrophone with four piezoelectric circular tubes, in combination with insulating gaskets, electrode sheets, end caps, deep-water connectors, glass cloth, shielding nets and vulcanized rubber layers. This hydrophone achieves a small size and achieves high sensitivity and broadband flatness through optimized design. However, the manufacturing process is relatively complex, and it is difficult to ensure the consistency of the hydrophone during mass production.

[0006] In addition, the existing packaging processes for hydrophones are mostly polyurethane potting and rubber vulcanization packaging. The advantages of polyurethane packaging for hydrophones are simple mold design, gentle molding method and batch potting. However, due to the limitations of the development of hydroacoustic polyurethane materials, the water permeability coefficient of the currently commonly used polyurethane materials is 4.97×10-7g·cm / (cm2·hr·133.32Pa). The hydrophone has poor resistance to seawater immersion and cannot be used underwater for a long time. Compared with the rubber vulcanization packaging of polyurethane materials, its advantage is lower water permeability, and the commonly used chloroprene rubber is 9.4×10-9g·cm / (cm2·hr·133.32Pa). However, since the molding conditions need to be carried out at high temperature and a certain pressure, and are limited by factors such as the size and molding time of the vulcanization press, the rubber packaging of hydrophones is not as popular as polyurethane packaging. In recent years, the demand for hydrophones has continued to grow, and the shortcomings of traditional packaging methods have become increasingly obvious. Taking the production of a certain type of hydrophone as an example, the polyurethane potting technology cannot meet the indicator of underwater use time, while the rubber vulcanization production quantity is small and the yield rate is low, resulting in delayed delivery schedule. Therefore, the hydrophone urgently needs a packaging technology that can be used for a long time and has fast molding and high efficiency. Summary of the invention

[0007] In view of the defects in the prior art, an object of the present invention is to provide a rapid packaging piezoelectric circular tube hydrophone and a manufacturing method thereof.

[0008] According to the present invention, a fast-packaging piezoelectric circular tube hydrophone and a manufacturing method thereof include a piezoelectric hydrophone and a preamplifier. The piezoelectric hydrophone includes an injection-molded polyurethane coating layer, a piezoelectric ceramic circular tube and a base. The inner wall of the piezoelectric ceramic circular tube is a positive electrode, and the outer wall is a negative electrode. The positive and negative electrodes are led out through wires. The outer side of the piezoelectric ceramic circular tube is provided with a shielding ring.

[0009] The upper and lower ends of the piezoelectric ceramic tube are respectively provided with an upper end cover of the hydrophone and a lower end cover of the hydrophone, the lower end cover of the hydrophone is fastened to the preamplifier through the base, and the injection-molded polyurethane coating layer completely covers the upper end cover of the hydrophone, the piezoelectric ceramic tube, the shielding ring, the lower end cover of the hydrophone, and the connection between the lower end cover of the hydrophone and the base;

[0010] The front-placement device comprises an outer cylinder and a front-placement cylinder. The outer cylinder is tightly connected to the outer side of the base. The outer cylinder is sleeved on the outer side of the front-placement cylinder, and a heat-conducting potting glue is arranged between the two.

[0011] Preferably, the shielding ring is formed by coating a PEEK insulating ring and a carbon fiber rope, and the shielding ring is fitted to the piezoelectric ceramic round tube.

[0012] Preferably, positioning rings are respectively provided at the upper and lower ends of the piezoelectric ceramic tube, the positioning rings are made of polyurethane material, the shielding ring and the outer side of the positioning ring are in the same plane, and the centers of the piezoelectric ceramic tube, the positioning ring and the shielding ring are on the same axis.

[0013] Preferably, the injection-molded polyurethane coating layer has a perimeter thickness of 2 mm and a top thickness of 5 mm.

[0014] Preferably, the positive electrode of the piezoelectric ceramic tube passes through the interior of the ceramic support rod, and the negative electrode of the piezoelectric ceramic tube is led out through the groove of the bottom positioning ring.

[0015] Preferably, a wire-passing cabin is provided inside the base, two ends of the wire-passing cabin are respectively connected to the lower end cover of the hydrophone and the front-end device, and an insulating ring is provided between the wire-passing cabin and the base.

[0016] Preferably, the upper and lower ends of the front cylinder are respectively equipped with a front cylinder upper end cover and a front cylinder lower end cover, and a locking ring is provided on the outer side of the connection between the front cylinder upper end cover and the front cylinder, and the locking ring is made of polyurethane material.

[0017] Preferably, the front-stage cylinder is made of a 0.3-0.5 mm thick metal material, and a silicon nitride thermal conductive silicone sheet is adhered to the inner wall of the front-stage cylinder.

[0018] Preferably, the thermally conductive potting adhesive is made of silicon carbide powder and organic silicon material.

[0019] A method for manufacturing a fast-packaged piezoelectric circular tube hydrophone provided by the present invention is applied to the above-mentioned fast-packaged piezoelectric circular tube hydrophone, including a method for manufacturing a piezoelectric hydrophone and a method for manufacturing a preamplifier;

[0020] The piezoelectric hydrophone manufacturing method comprises the following steps:

[0021] Step A1, first lead out the positive and negative electrodes of the piezoelectric ceramic tube;

[0022] Step A2, performing surface treatment on the piezoelectric ceramic tube, installing a shielding ring and a positioning ring, and curing;

[0023] Step A3: Install the lower end cover and upper end cover of the hydrophone.

[0024] Step A4, put an insulating ring on the lower end cover of the hydrophone and connect it to the base;

[0025] Step A5, performing surface treatment on the assembled hydrophone, coating the hydrophone with a coupling agent, and performing injection molding after drying and curing;

[0026] The method for manufacturing the preamplifier comprises the following steps:

[0027] Step B1, install the rubber, the first gasket, the upper end cover of the front cylinder, and the front cylinder in order, and then use the insulating locking ring to lock it;

[0028] Step B2, a silicon nitride thermal conductive silicone sheet is adhered to the inner wall of the front cylinder, and a thermal conductive potting glue is placed between the front cylinder and the outer cylinder;

[0029] Step B3, installing the lower end cover of the front cylinder, and installing the second gasket, the second sealing ring and the connector to tighten them;

[0030] Step B4, closing the outer cylinder.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The invention realizes automatic packaging of piezoelectric ceramic round tube hydrophones through injection molding technology, solves the problem of bubbles caused by polyurethane potting and rubber vulcanization, improves packaging efficiency, and also improves the consistency of the piezoelectric ceramic round tube hydrophone, which can be used in large-scale array systems; a shielding ring is used to replace the original shielding layer of glass cloth and conductive adhesive, improves the consistency of materials, and optimizes the manufacturing technology of the hydrophone; the air cavity between the shells is reduced by means of thermal conductive potting adhesive, and the thermal conductivity is improved, providing a method for high-power use of the hydrophone; a piezoelectric round tube hydrophone with high withstand voltage, high heat resistance, high sound pressure sensitivity and high consistency and suitable for mass production is obtained; the molding time of the hydrophone is reduced, the packaging cycle is shortened, and the production efficiency is improved, not only can the amount of glue feeding be strictly controlled and the appearance is beautiful, but also the adverse factors caused by manual glue preparation are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0034] Figure 1 This is a schematic diagram of the structure of a fast-packaging piezoelectric circular tube hydrophone mainly embodied in the present invention;

[0035] Figure 2 This is an exploded view of a piezoelectric circular tube hydrophone that is mainly embodied in the present invention;

[0036] Figure 3 This is a schematic diagram of the injection molding process for rapidly packaging a piezoelectric round tube hydrophone, which is mainly embodied in the present invention;

[0037] Figure 4 This is an appearance diagram of a piezoelectric hydrophone mainly embodied in the present invention;

[0038] Figure 5 It is a cross-sectional view of a piezoelectric hydrophone mainly embodied in the present invention;

[0039] Figure 6 This is an appearance diagram of a fast-packaging piezoelectric circular tube hydrophone mainly embodied in the present invention;

[0040] Figure 7 The present invention mainly embodies the comparison of hydrophone sensitivity with different packaging processes;

[0041] Figure 8 This is a table showing the changes in insulation resistance of a rapidly packaged piezoelectric circular tube hydrophone mainly embodied in the present invention.

[0042] As shown in the figure:

[0043] Injection-molded polyurethane coating 1 Piezoelectric ceramic tube 2 Positioning ring 3

[0044] Hydrophone lower end cover 4 Shielding ring 5 Hydrophone upper end cover 6

[0045] Base 7 Outer cylinder 8 Insulation ring 9

[0046] First sealing ring 10 Rubber 11 First cushion block 12

[0047] Wire compartment 13 Front cylinder upper end cover 14 Locking ring 15

[0048] Front release 16 Front release cylinder 17 Front release cylinder lower end cover 18

[0049] Second cushion block 19 Second sealing ring 20 Connector 21

[0050] Locking nut 22 Third sealing ring 23 DETAILED DESCRIPTION

[0051] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0052] Example 1

[0053] like Figure 1-6As shown, a fast-packaging piezoelectric circular tube hydrophone provided according to the present invention includes: a piezoelectric hydrophone and a preamplifier, the piezoelectric hydrophone includes an injection-molded polyurethane coating layer 1, a piezoelectric ceramic circular tube 2 and a base 7, the inner wall of the piezoelectric ceramic circular tube 2 is a positive electrode, the outer wall is a negative electrode, the positive and negative electrodes are led out through thin wires, and a shielding ring 5 is sleeved on the outer side of the piezoelectric ceramic circular tube 2; the upper and lower ends of the piezoelectric ceramic circular tube 2 are respectively installed with a hydrophone upper end cover 6 and a hydrophone lower end cover 4, the hydrophone lower end cover 4 is fastened to the preamplifier through the base 7, and the piezoelectric hydrophone and the preamplifier are fixed to the base 7 by threaded clamping. The injection-molded polyurethane coating layer 1 completely covers the upper end cover 6 of the hydrophone, the piezoelectric ceramic tube 2, the shielding ring 5, the lower end cover 4 of the hydrophone, and the connection between the lower end cover 4 of the hydrophone and the base 7, that is, the outer surface of the piezoelectric ceramic tube 2 is completely covered by the injection-molded polyurethane coating layer 1 that is sound-transparent, water-resistant and pressure-resistant; the front-end device includes an outer cylinder 8 and a front-end cylinder 17, the outer cylinder 8 is tightly connected to the outer side of the base 7, the outer cylinder 8 is sleeved on the outer side of the front-end cylinder 17, and a heat-conducting potting glue is arranged between the two.

[0054] The shielding ring 5 is formed by coating a PEEK insulating ring and a carbon fiber rope, and is arranged in close contact with the piezoelectric ceramic tube 2. The shielding ring 5 uses a PEEK insulating ring with the same inner diameter as the outer diameter of the piezoelectric ceramic tube 2 and a conductive carbon fiber rope to replace the conventional glass cloth and conductive adhesive coating.

[0055] Positioning rings 3 are respectively provided at the upper and lower ends of the piezoelectric ceramic tube 2, that is, the upper and lower ends of the piezoelectric ceramic tube 2 are positioned by high-strength polyurethane positioning rings 3. The positioning ring 3 is made of high-strength polyurethane material that is resistant to high temperatures. The shielding ring 5 is in the same plane as the outer side of the positioning ring 3, and the centers of the piezoelectric ceramic tube 2, the positioning ring 3 and the shielding ring 5 are on the same axis.

[0056] The coating layer is made of thermoplastic high-strength polyurethane formed by injection molding. The water permeability coefficient of the high-strength injection-molded polyurethane is 8.5×10 -12 g·cm / (cm 2 ·hr·133.32Pa), its hardness is about Shore A80, and under the action of coupling agent, it has good adhesion with shielding layer and metal. Injection molding is a fully automated process, with fast and consistent molding, no bubble influence, and the process is matched with the injection molding machine used and the piezoelectric ceramic round tube hydrophone. The peripheral thickness of the injection-molded polyurethane coating layer 1 is controlled at about 2mm, and the top thickness is controlled at about 5mm.

[0057] In order to realize the packaging process of injection molding, the outer surface of the hydrophone element adopts a hole-free design, the positive electrode of the piezoelectric ceramic tube 2 passes through the inside of the ceramic support rod, and the negative electrode of the piezoelectric ceramic tube 2 is led out through the bottom positioning ring groove.

[0058] A wire-passing cabin 13 is arranged inside the base 7 , and two ends of the wire-passing cabin 13 are respectively connected to the lower end cover 4 of the hydrophone and the front-end device, and an insulating ring 9 is arranged between the wire-passing cabin 13 and the base 7 .

[0059] The upper and lower ends of the front cylinder 17 are respectively provided with a front cylinder upper end cover 14 and a front cylinder lower end cover 18. A locking ring 15 is arranged on the outer side of the connection between the front cylinder upper end cover 14 and the front cylinder 17. The locking ring 15 is made of high-strength polyurethane material.

[0060] The front cylinder 17 is made of a 0.3-0.5 mm thick metal material, and a silicon nitride heat-conducting silicone sheet is adhered to the inner wall of the front cylinder 17 .

[0061] The heat-conducting potting glue is made of silicon carbide powder and organic silicon material, that is, the front cylinder 17 and the outer cylinder 8 are filled with heat-conducting materials made of silicon carbide powder and organic silicon material.

[0062] The present application uses injection molding technology to achieve automatic packaging of piezoelectric ceramic circular tube hydrophones, solves the problem of bubbles caused by polyurethane potting and rubber vulcanization, improves packaging efficiency, and also improves the consistency of piezoelectric ceramic circular tube hydrophones, which can be used in large-scale array systems. The present application uses a shielding ring 5 to replace the original shielding layer of glass cloth and conductive adhesive, improves the consistency of materials, and optimizes the manufacturing technology of hydrophones. The present application uses thermally conductive potting glue to reduce the air cavity between the shells, improves the thermal conductivity, and provides a method for high-power use of hydrophones; a piezoelectric circular tube hydrophone with high pressure resistance, high heat resistance, high sound pressure sensitivity and high consistency and suitable for mass production is obtained. Experiments have shown that the hydrophone of the present application can withstand a hydrostatic pressure of 50MPa.

[0063] Example 2

[0064] A method for manufacturing a fast-packaged piezoelectric circular tube hydrophone provided by the present invention is applied to the fast-packaged piezoelectric circular tube hydrophone of Example 1, including a method for manufacturing a piezoelectric hydrophone and a method for manufacturing a preamplifier;

[0065] The piezoelectric hydrophone manufacturing method comprises the following steps:

[0066] Step A1, first lead out the positive and negative electrodes of the piezoelectric ceramic tube 2;

[0067] Step A2, performing surface treatment on the piezoelectric ceramic tube 2, installing the shielding ring 5 and the positioning ring 3, and curing;

[0068] Step A3, installing the lower end cover 4 and the upper end cover 6 of the hydrophone,

[0069] Step A4, put the insulating ring 9 on the lower end cover 4 of the hydrophone and connect it to the base 7;

[0070] Step A5, performing surface treatment on the assembled hydrophone, coating the hydrophone with a coupling agent, and performing injection molding after drying and curing;

[0071] The method for manufacturing the preamplifier comprises the following steps:

[0072] Step B1, install the rubber 11, the first cushion block 12, the front cylinder upper end cover 14, and the front cylinder 17 in order, and then use the insulating locking ring 15 to lock them;

[0073] Step B2, a silicon nitride thermal conductive silicone sheet is adhered to the inner wall of the front cylinder 17, and a thermal conductive potting glue is placed between the front cylinder 17 and the outer cylinder 8;

[0074] Step B3, install the lower end cover 18 of the front cylinder, and install the second cushion block 19, the second sealing ring 20 and the connector 21 to be tightly connected;

[0075] Step B4, closing the outer cylinder 8.

[0076] In a specific embodiment, a piezoelectric ceramic tube 2 with a size of 4×φ16×φ14.4φ×11 (H) is surface treated to remove the oxide layer and stains on the inner and outer walls of the tube. The positive and negative electrodes of the ceramic are led out using a standard polytetrafluoroethylene sheathed thin wire. The ceramic tube with lead wires is then subjected to secondary surface treatment, and the surface treatment process includes plasma cleaning and high-temperature resistant epoxy adhesive coating. The positioning ring 3 and the shielding ring 5 are installed. During the installation process, it is necessary to ensure that the centers of the piezoelectric ceramic ring 2, the positioning ring 3 and the shielding ring 5 are on the same axis. Then, it is placed in a customized fixture for glue curing. After the glue is cured, the lower end cover 4 of the hydrophone and the upper end cover 6 of the hydrophone are installed and fixed with nuts. After the PEEK insulating ring 9 is put on the lower end cover 4 of the hydrophone, the lower end cover 4 and the wire compartment 13 are tightened by threads and the first sealing ring 10. The assembled hydrophone is surface treated, including plasma cleaning and coating of a coupling agent suitable for injection molding. After the coupling agent is applied, it is cured in an oven at 80°C and then loaded into Figure 3 The injection mold shown in the figure is used for injection molding. The injection pressure and clamping pressure are set to 5MPa during the injection molding process and a five-stage heating process is adopted to reduce the melt temperature to 220°C, reduce the flow rate, and extend the cooling time until the instantaneous material temperature of the package is reduced to 180°C. The water circulation controls the mold temperature to 60°C. After completion, demoulding is performed to cool the mold and post-curing is performed in an oven. Figure 4 The piezoelectric ceramic circular tube hydrophone shown.

[0077] The rubber 11 and the first gasket 12 are placed inside the base 7 to install the upper end cover 14 of the front-stage cylinder, and the front-stage cylinder 17 with the built-in front-stage 16 is installed on the outside of the upper end cover 14 of the cylinder, and then locked with the insulating locking ring 15. In order to improve the sensitivity of the hydrophone and maximize the utilization of the front-stage device, a thermally conductive potting glue is added between the front-stage cylinder 17 and the outer cylinder 8 of the hydrophone. This thermally conductive potting glue is made of silicon carbide powder and organic silicon material, and has good high thermal conductivity and high insulation. It has low water absorption and good adhesion with the metal shell. After that, the lower end cover 18 of the front-stage cylinder and the second gasket 19 are installed, and the connector 21 is tightened with the thread and the second sealing ring 20, and then the third sealing ring 23 and the locking nut 22 are used for secondary sealing. The connector 21 can be any device on the market that can be adapted to the present application.

[0078] like Figure 7 As shown in the comparison diagram of the injection molded test piece 1-2 and the rubber vulcanized test piece 1-2, there is no obvious difference in sensitivity performance between the injection molded hydrophone of the present application and the rubber vulcanized hydrophone. Figure 8 The injection molded test pieces Injection 1-4 and the potting molded test pieces Potting 1-2 are shown. After the soaking test, it is found that the insulation of the injection molded hydrophone of the present application is not much changed compared with the potting molded hydrophone, but the injection molding is more stable. The injection molded parts and potting parts used as test pieces in the present application are both used to test the single performance of the hydrophone, and no pre-amplifier is added for testing. Compared with traditional vulcanization molding, the present application has significant advantages. The molding time of the hydrophone of the present application is reduced, the packaging cycle is shortened, and the production efficiency is improved; the present application has a high degree of automation, which can not only strictly control the amount of glue fed and have a beautiful appearance, but also reduce the adverse factors caused by manual glue mixing.

[0079] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0080] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A fast packaged piezoelectric circular tube hydrophone, characterized in that: include: A piezoelectric hydrophone and a preamplifier, wherein the piezoelectric hydrophone comprises an injection-molded polyurethane coating layer (1), a piezoelectric ceramic tube (2) and a base (7), wherein the inner wall of the piezoelectric ceramic tube (2) is a positive electrode and the outer wall is a negative electrode, and the positive and negative electrodes are led out through a wire, and a shielding ring (5) is sleeved on the outer side of the piezoelectric ceramic tube (2); The upper and lower ends of the piezoelectric ceramic tube (2) are respectively provided with a hydrophone upper end cover (6) and a hydrophone lower end cover (4); the hydrophone lower end cover (4) is tightly connected to the preamplifier via the base (7); the injection-molded polyurethane coating layer (1) completely covers the hydrophone upper end cover (6), the piezoelectric ceramic tube (2), the shielding ring (5), the hydrophone lower end cover (4), and the connection between the hydrophone lower end cover (4) and the base (7); The front-mounted device comprises an outer cylinder (8) and a front-mounted cylinder (17); the outer cylinder (8) is tightly connected to the outer side of the base (7); the outer cylinder (8) is sleeved on the outer side of the front-mounted cylinder (17), and a heat-conducting potting glue is arranged between the two.

2. The fast packaging piezoelectric circular tube hydrophone according to claim 1, characterized in that: The shielding ring (5) is formed by coating a PEEK insulating ring and a carbon fiber rope, and the shielding ring (5) is arranged in close contact with the piezoelectric ceramic round tube (2).

3. The fast packaging piezoelectric circular tube hydrophone according to claim 1, characterized in that: Positioning rings (3) are respectively arranged at the upper and lower ends of the piezoelectric ceramic circular tube (2); the positioning ring (3) is made of polyurethane material; the shielding ring (5) and the outer side of the positioning ring (3) are located in the same plane; and the centers of the piezoelectric ceramic circular tube (2), the positioning ring (3) and the shielding ring (5) are located on the same axis.

4. The fast packaging piezoelectric circular tube hydrophone according to claim 1, characterized in that: The injection-molded polyurethane coating layer (1) has a peripheral thickness of 2 mm and a top thickness of 5 mm.

5. The fast packaging piezoelectric round tube hydrophone according to claim 1, characterized in that: The positive electrode of the piezoelectric ceramic round tube (2) passes through the interior of the ceramic support rod, and the negative electrode of the piezoelectric ceramic round tube (2) is led out through the bottom positioning ring groove.

6. The fast packaging piezoelectric round tube hydrophone according to claim 5, characterized in that: A wire-passing cabin (13) is arranged inside the base (7), and two ends of the wire-passing cabin (13) are respectively connected to the lower end cover (4) of the hydrophone and the front-end device, and an insulating ring (9) is arranged between the wire-passing cabin (13) and the base (7).

7. The fast packaging piezoelectric round tube hydrophone according to claim 1, characterized in that: The upper and lower ends of the front cylinder (17) are respectively provided with a front cylinder upper end cover (14) and a front cylinder lower end cover (18). A locking ring (15) is provided on the outer side of the connection between the front cylinder upper end cover (14) and the front cylinder (17), and the locking ring (15) is made of polyurethane material.

8. The fast packaging piezoelectric round tube hydrophone according to claim 1, characterized in that: The front-stage cylinder (17) is made of a 0.3-0.5 mm thick metal material, and a silicon nitride heat-conducting silicone sheet is adhered to the inner wall of the front-stage cylinder (17).

9. The fast packaging piezoelectric round tube hydrophone according to claim 1, characterized in that: The thermally conductive potting glue is made of silicon carbide powder and organic silicon material.

10. A method for manufacturing a rapidly packaged piezoelectric circular tube hydrophone, characterized in that: The fast packaged piezoelectric circular tube hydrophone according to any one of claims 1 to 9 comprises a method for manufacturing the piezoelectric hydrophone and a method for manufacturing a preamplifier; The piezoelectric hydrophone manufacturing method comprises the following steps: Step A1, first lead out the positive and negative electrodes of the piezoelectric ceramic tube (2); Step A2, performing surface treatment on the piezoelectric ceramic tube (2), installing the shielding ring (5) and the positioning ring (3), and performing curing; Step A3, installing the lower end cover (4) and the upper end cover (6) of the hydrophone, Step A4, putting the insulating ring (9) on the lower end cover (4) of the hydrophone and connecting it to the base (7); Step A5, performing surface treatment on the assembled hydrophone, coating the hydrophone with a coupling agent, and performing injection molding after drying and curing; The method for manufacturing the preamplifier comprises the following steps: Step B1, installing the rubber (11), the first cushion block (12), the front cylinder upper end cover (14), and the front cylinder (17) in sequence, and then locking them with an insulating locking ring (15); Step B2, a silicon nitride heat-conducting silicone sheet is adhered to the inner wall of the front cylinder (17), and a heat-conducting potting glue is placed between the front cylinder (17) and the outer cylinder (8); Step B3, installing the lower end cover (18) of the front cylinder, and installing the second cushion block (19), the second sealing ring (20) and the connector (21) for fastening connection; Step B4, closing the outer cylinder (8).

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