Hydrophone installation device and disassembly and assembly method

Abstract

The hydrophone installation device comprises a hydrophone fixing cylinder, a suspension frame and a metal cover which are sequentially arranged from inside to outside, and a sound transmission plate which is arranged corresponding to an opening of a ship bottom plate in a sealed mode, a hydrophone body is arranged in the hydrophone fixing cylinder, a cable of the hydrophone body penetrates out of the top of the metal cover, and the hydrophone fixing cylinder is connected with the sound transmission plate. The upper end and the lower end of the hydrophone fixing cylinder are connected with the suspension frame through the elastic pieces respectively, the upper end and the lower end of the suspension frame are connected with the metal cover through the elastic pieces respectively, the marine hydrophone is convenient to disassemble and maintain in time, and the influence of ship vibration on the accuracy of the measurement result of the hydrophone can be weakened.

Description

Technical Field

[0001] The present invention belongs to the technical field of ship acoustic performance monitoring, and in particular relates to a hydrophone installation device and a disassembly method. Background Art

[0002] Self-noise is a significant interference to shipboard sonars and requires real-time monitoring using hydrophones. Properly installing hydrophones to improve their utilization efficiency and measurement accuracy is a challenging engineering challenge. First, when measuring a ship's hydrodynamic self-noise, the hydrophone must be fixed to the ship's outer plating. A common method involves inserting the hydrophone through a hole in the plating. Using the conventional installation method, if problems are discovered after the hydrophone is installed and require adjustment or repair, the welded parts of the hydrophone installation must be removed and repaired after the ship is docked. Otherwise, there is a risk of water flowing in through the plating hole, endangering the safety of the ship's operation. Therefore, the conventional installation method results in low utilization and maintenance efficiency of the hydrophone. Furthermore, when the ship is underway, the hydrophone is easily affected by the vibration of the hull structure, introducing additional noise and reducing the accuracy of its measurement results. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a hydrophone installation device and disassembly method to address the above-mentioned problems, so as to facilitate the disassembly and maintenance of the hydrophone and reduce the interference of hull vibration on the hydrophone noise measurement.

[0004] The embodiment of the present application is implemented as follows: An embodiment of the present application provides a hydrophone mounting device, which is installed corresponding to an opening in the bottom plate of a ship and is characterized in that it includes a hydrophone fixing tube, a suspension frame and a metal cover arranged in sequence from the inside to the outside, and a sound-transmitting plate sealed corresponding to the opening in the bottom plate of the ship, the hydrophone fixing tube has a built-in hydrophone body, the cable of the hydrophone body passes through the top of the metal cover, the upper and lower ends of the hydrophone fixing tube are respectively connected to the suspension frame by elastic parts, and the upper and lower ends of the suspension frame are respectively connected to the metal cover by elastic parts.

[0005] In some optional embodiments, a water inlet pipe and a water inlet valve are provided above one side of the metal cover, and a water outlet pipe and a water outlet valve are provided below the other side.

[0006] In some optional embodiments, the metal cover is a steel cover structure with an open bottom, and a detachable cover is provided on the top of the metal cover.

[0007] In some optional embodiments, the gap between the hydrophone body and the hydrophone fixing tube is filled with vibration-damping and sound-absorbing material.

[0008] In some optional embodiments, the elastic member is a shock-absorbing spring.

[0009] In some optional embodiments, a through hole is provided in the center of the cover plate, a cup-shaped tube section is welded to the through hole, the cable of the hydrophone body passes through the cup-shaped tube section, and a sealing member is provided for sealing.

[0010] In some optional embodiments, the cover plate is made of stainless steel, connected to the metal cover by bolts, and sealed with an O-ring.

[0011] In some optional embodiments, the sound-permeable panel is made of titanium alloy material, welded to the opening of the bottom plate of the ship, and watertightened.

[0012] In some optional embodiments, the vibration-damping and sound-absorbing material is provided with three layers from the inside to the outside, the inner layer is a cotton flannel layer, the middle layer is a polyurethane foam layer, and the outer layer is a wave sponge layer.

[0013] A method for disassembling and assembling a hydrophone installation device, characterized by comprising the following steps: Step a, installation: Step a1: Drill a hole in the bottom plate, fully weld the acoustically transparent panel to the hole, fully weld the metal cover to the bottom plate, connect the water inlet and outlet pipes, inject water from the inlet pipe, and drain water through the outlet pipe to verify the watertightness of the device; Step a2, coating the hydrophone with a vibration-damping and sound-absorbing material and then installing it in a hydrophone fixing tube; Step a3: Fix the hydrophone fixing tube to the suspension frame via the vibration-damping spring, then fix the suspension frame to the metal cover via the vibration-damping spring. Pass the hydrophone cable through the cup-shaped pipe joint and seal it. Finally, connect the cover plate to the metal cover with bolts. Step a4: After water is injected into the watertight metal cover through the water inlet pipe, the hydrophone noise is measured. After the noise measurement is completed, the water is discharged through the water outlet pipe; Step b, disassembly: Step b1: Remove the bolts and O-rings at the connection between the cover plate and the watertight metal cover to complete the cover plate removal; Step b2: remove the vibration-damping spring from the suspension frame and dismantle the vibration-damping spring between the hydrophone fixing tube and the suspension frame, completing the disassembly of the suspension frame and the hydrophone fixing tube; Step b3: Remove the screws locking the hydrophone fixing tube, take out the hydrophone, and complete the disassembly of the hydrophone.

[0014] The beneficial effects of the present application are as follows: the present application provides a hydrophone installation device and disassembly method, which adopt an assembled structural design, solves the problem that shipboard hydrophones cannot be disassembled and repaired in time, reduces the time for disassembly and repair, and effectively weakens the interference of hull vibration on hydrophone measurement results through the design of vibration-damping structure installation accessories, thereby improving the measurement accuracy of hydrophone self-noise, and can play a role in monitoring ship hydrodynamic self-noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is an axonometric view of a hydrophone mounting device according to an embodiment of the present application. DETAILED DESCRIPTION

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0019] It should be understood that the size of the serial numbers of the steps in the embodiment does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0021] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0022] Terms such as "transverse," "longitudinal," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" indicate orientations or positional relationships based on those shown in the accompanying drawings. These terms are used solely to facilitate the description of this application and to simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0024] The features and performance of the present application are further described in detail below with reference to the embodiments.

[0025] This invention proposes a vibration-damping and easily disassembled hydrophone mounting device. The hydrophone is mounted inside the ship using a removable watertight metal cover with an acoustically transparent plate and cover. Water is then injected into the watertight cover to enable the hydrophone's noise measurement function. After a hole is drilled in the ship's bottom plating, the acoustically transparent plate is welded to the hole, and the cover is welded to the plating. Other accessories are assembled using sealing rings and bolts. This device allows the hydrophone to be disassembled and repaired at any time. Furthermore, vibration damping measures are added to reduce the impact of ship vibration on the hydrophone, thereby improving the accuracy of the hydrophone's self-noise measurement.

[0026] Example 1 like Figure 1 As shown, this embodiment discloses a hydrophone installation device, including a hydrophone fixing tube 1, a suspension frame 2 and a metal cover 3 arranged in sequence from the inside to the outside, and a sound-transmitting plate 4 sealed corresponding to the opening of the bottom plate of the ship. The hydrophone fixing tube has a built-in hydrophone body 5, and the cable of the hydrophone body passes through the top of the metal cover. The upper and lower ends of the hydrophone fixing tube are respectively connected to the suspension frame through elastic members 6, and the upper and lower ends of the suspension frame are respectively connected to the metal cover through.

[0027] At the same time, a water inlet pipe 7 and a water inlet valve 8 are provided above one side of the metal cover, and a water outlet pipe 9 and a water outlet valve 10 are provided below the other side to facilitate water injection and drainage into the metal cover.

[0028] Existing hydrophones are directly fixed to the ship's outer plating to measure a ship's hydrodynamic self-noise. However, placing the hydrophone outside the ship can cause water flow to impact it, introducing other vibration interference. In this invention, the hydrophone is fixed inside the ship and enclosed by a metal cover, a cover plate, and an acoustically transparent panel, effectively preventing water flow impact. The ship's hydrodynamic self-noise passes through the acoustically transparent panel, and the signal is transmitted to the hydrophone through the water in the metal cover.

[0029] Furthermore, the metal cover is an open-bottomed steel structure with a removable cover plate 11 at its top. A through-hole is located in the center of the cover plate, through which a cup-shaped tube segment 12 is welded. The hydrophone cable passes through the cup-shaped tube segment and is sealed with a seal. The cover plate is made of stainless steel and is bolted to the metal cover with an O-ring seal. The removable connection between the metal cover and the cover plate facilitates installation and removal of the hydrophone.

[0030] In order to further enhance the vibration reduction effect of the device, the gap between the hydrophone body and the hydrophone fixing tube is filled with vibration reduction and sound absorption material.

[0031] The design of vibration damping and sound absorbing materials is as follows: The vibration-damping and sound-absorbing materials are arranged in three layers from the inside to the outside, the inner layer is a cotton flannel layer, the middle layer is a polyurethane foam layer, and the outer layer is a wave sponge layer.

[0032] (a) Sponge (wave / peak sponge): Wave sponge is made of polyurethane sponge material, which is specially processed to form a wave shape. It has good sound absorption, sound insulation and vibration reduction properties.

[0033] (b) Cotton flannel: Cotton flannel is also a commonly used covering material. It has good sound absorption and vibration reduction properties while providing a soft protective layer.

[0034] (c) Polyurethane foam: Polyurethane foam has good sound absorption and durability, effectively reducing vibration and noise. In the packaging of hydrophones, polyurethane foam is used as a built-in supporting foam structure.

[0035] Vibration-damping and sound-absorbing materials can effectively reduce the interference of vibration noise from the installation structure on the hydrophone, achieving primary vibration reduction of the hydrophone.

[0036] Example 2 In this embodiment, the elastic member is a shock-absorbing spring.

[0037] The hydrophone fixing tube and the suspension frame are fixed by spatially symmetrical vibration reduction springs, which can play an effective vibration reduction and damping effect, thereby achieving a secondary vibration reduction effect of the hydrophone.

[0038] The suspension frame and the metal cover are fixed with spatially symmetrical vibration-damping springs. The spring material is selected according to the hull material, which can effectively decouple the influence of hull vibration on the hydrophone, improve the accuracy of hydrophone measurement results, and achieve the overall vibration reduction effect of the device.

[0039] Furthermore, the sound-permeable panels are made of titanium alloy, welded to the openings in the bottom plate, and watertightened to ensure that water does not flow into the cabin through the holes in the plate.

[0040] Example 3 First, all components of this product are designed and subjected to factory performance inspection to ensure that they meet size and performance requirements.

[0041] The actual ship installation is carried out according to the following process flow of component installation, including the following steps: 1. Drill a hole in the bottom plate, fully weld the sound-permeable panel to the hole in the bottom plate, fully weld the metal cover to the bottom plate, and connect the water inlet and outlet pipes. Fill water from the water inlet pipe and drain water through the outlet pipe to verify the watertightness of the device.

[0042] 2. Wrap the hydrophone with vibration-damping and sound-absorbing material and install it in the hydrophone fixing tube.

[0043] 3. Fix the hydrophone fixing tube to the suspension frame through the vibration-damping spring, and then fix the suspension frame in the metal cover through the vibration-damping spring. Pass the hydrophone cable through the cup-shaped pipe joint and seal it. Finally, connect and fix the cover plate to the metal cover with bolts.

[0044] 4. After filling water into the watertight metal cover through the water inlet pipe, perform hydrophone noise measurement. After the noise measurement is completed, drain the water through the outlet pipe.

[0045] The disassembly of the device includes the following steps: 1. Remove the bolts and O-rings at the connection between the cover and the watertight metal cover to complete the cover removal.

[0046] 2. Remove the vibration damping spring from the suspension frame and dismantle the vibration damping spring between the hydrophone fixing tube and the suspension frame to complete the disassembly of the suspension frame and the hydrophone fixing tube.

[0047] 3. Remove the screws locking the hydrophone fixing tube, take out the hydrophone, and complete the disassembly of the hydrophone.

Claims

1. A hydrophone mounting device, wherein the mounting device is mounted corresponding to an opening in a bottom plate of a ship, characterized in that: The hydrophone fixing tube comprises a hydrophone fixing tube, a suspension frame and a metal cover which are arranged in sequence from the inside to the outside, and a sound-transmitting plate which is sealed corresponding to the opening of the bottom plate. The hydrophone fixing tube has a built-in hydrophone body, and the cable of the hydrophone body passes through the top of the metal cover. The upper and lower ends of the hydrophone fixing tube are respectively connected to the suspension frame through elastic parts, and the upper and lower ends of the suspension frame are respectively connected to the metal cover through elastic parts.

2. A hydrophone installation device according to claim 1, characterized in that: A water inlet pipe and a water inlet valve are arranged above one side of the metal cover, and a water outlet pipe and a water outlet valve are arranged below the other side.

3. A hydrophone installation device according to claim 2, characterized in that: The metal cover is a steel cover structure with an opening at the bottom, and a detachable cover plate is provided on the top of the metal cover.

4. A hydrophone installation device according to claim 3, characterized in that: The gap between the hydrophone body and the hydrophone fixing tube is filled with vibration-damping and sound-absorbing material.

5. A hydrophone installation device according to claim 1 or 4, characterized in that: The elastic member is a shock-absorbing spring.

6. The hydrophone installation device according to claim 4, characterized in that: A through hole is provided in the center of the cover plate, a cup-shaped pipe section is welded to the through hole, the cable of the hydrophone body passes through the cup-shaped pipe section, and a sealing member is provided for sealing.

7. The hydrophone installation device according to claim 6, characterized in that: The cover plate is made of stainless steel, is connected to the metal cover by bolts, and is sealed by an O-ring.

8. A hydrophone installation device according to claim 1 or 6, characterized in that: The sound-permeable plate is made of titanium alloy material, welded to the opening of the bottom plate of the ship, and is watertight.

9. A hydrophone installation device according to claim 4 or 6, characterized in that: The vibration-damping and sound-absorbing material is provided with three layers from the inside to the outside, the inner layer is a cotton flannel layer, the middle layer is a polyurethane foam layer, and the outer layer is a wave sponge layer.

10. A method for disassembling and assembling a hydrophone installation device according to claim 6, characterized in that: The steps include: Step a, installation: Step a1: Drill a hole in the bottom plate, fully weld the acoustically transparent panel to the hole, fully weld the metal cover to the bottom plate, connect the water inlet and outlet pipes, inject water from the inlet pipe, and drain water through the outlet pipe to verify the watertightness of the device; Step a2, coating the hydrophone with a vibration-damping and sound-absorbing material and then installing it in a hydrophone fixing tube; Step a3: Fix the hydrophone fixing tube to the suspension frame via the vibration-damping spring, then fix the suspension frame to the metal cover via the vibration-damping spring. Pass the hydrophone cable through the cup-shaped pipe joint and seal it. Finally, connect the cover plate to the metal cover with bolts. Step a4: After water is injected into the watertight metal cover through the water inlet pipe, the hydrophone noise is measured. After the noise measurement is completed, the water is discharged through the water outlet pipe; Step b, disassembly: Step b1: Remove the bolts and O-rings at the connection between the cover plate and the watertight metal cover to complete the cover plate removal; Step b2: remove the vibration-damping spring from the suspension frame and dismantle the vibration-damping spring between the hydrophone fixing tube and the suspension frame, completing the disassembly of the suspension frame and the hydrophone fixing tube; Step b3: Remove the screws locking the hydrophone fixing tube, take out the hydrophone, and complete the disassembly of the hydrophone.

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