Implosion protection device for hydraulic test of marine instrument and test method

Abstract

The invention discloses a marine instrument hydraulic pressure test implosion protection device and a test method. The marine instrument hydraulic pressure test implosion protection device is composed of an external bearing assembly, an internal buffering assembly, an instrument fixing support and a buffering material layer. The external bearing assembly is a stainless steel cylinder with the inner diameter smaller than that of the pressure test chamber, a cylinder framework is formed by welding stainless steel pipes serving as keels, a plurality of small through holes are evenly punched in the circumferential direction and the axial direction of each stainless steel pipe, and the periphery, the upper portion and the bottom of the cylinder framework are each provided with a first stainless steel punched plate. The internal buffer assembly is a barrel made of a stainless steel bar as a keel, a layer of stainless steel punched plate II is arranged on the periphery and two ends of the barrel, and buffer material layers are arranged on the peripheral outer wall and two ends of the internal buffer assembly; the instrument fixing assembly is fixed in the internal buffer assembly and clamps and fixes the marine instrument to be tested. Energy of shock waves and reflected shock waves can be effectively relieved, pressure shock damage is reduced, and test instruments are protected; the device is high in deformation resistance and not easy to damage, the maintenance cost of the device is greatly reduced, and the test efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of marine instrument environmental testing and detection, and in particular to a marine instrument water pressure test implosion protection device and a testing method. Background Art

[0002] The water pressure test is a unique marine instrument environmental test in the marine field. It is mainly used to detect whether the marine instrument will deform, implode, leak, etc. after being subjected to a simulated pressure environment under deep-sea conditions. All marine instruments launched into the water will undergo a water pressure test during product design, processing, and factory acceptance to verify whether the product can withstand the designed pressure and whether the product will leak under pressure conditions. During the water pressure test, it is often found that the marine instrument will implode under high pressure due to unreasonable structural design of the marine instrument and unqualified material composition. Marine instrument designers will also take the initiative to conduct a water pressure implosion test on marine instruments to find the ultimate compressive strength of the marine instrument shell, so as to facilitate the later design of a shell that better meets the depth requirements for use. However, when a marine instrument implodes, the high-pressure water flow will converge and collide with the center of the crush. During the continuous implosion, the pressure in the test chamber is converted into fluid kinetic energy, generating an implosion shock wave, which will cause irreversible damage to other tested marine instruments and equipment, pressure test chambers, etc. around it. A large number of experiments have shown that marine instruments will break or collapse when they implode, and even produce a large number of test fragments.

[0003] During a traditional water pressure test, the oceanographic instrument will be simply fixed on a fixture bracket, and then the fixture bracket and the oceanographic instrument will be directly placed in the pressure test chamber. After closing the sealing end cover, the high-pressure pump will be turned on to start the test. If an implosion occurs during the process of increasing pressure, maintaining pressure, and reducing pressure, the test will be stopped and the sample will be taken out for inspection. However, this type of traditional test has the following disadvantages:

[0004] 1. In the absence of any protective measures, the high pressure and fragment impact generated by the broken samples after the implosion will cause great damage to the high-pressure test system, such as micro-cracks in the bulkhead and dents in the cabin. In addition, the broken samples cannot be collected when the pressure is released and the debris is cleaned, which affects the subsequent analysis of the product by the designers.

[0005] 2. The pressure shock and vibration generated after the sample implosion will also cause the valves and pipelines of the high-pressure test system to loosen, causing high-pressure water to rapidly leak out from the gaps in the pipelines with high energy, directly affecting the personal safety of the test personnel.

[0006] 3. The tiny fragments produced after the sample implosion will block the pressure pipeline, causing the high-pressure test system to be unable to relieve pressure or increase pressure, causing safety problems and seriously affecting the test process.

[0007] 4. Marine instruments will also make a loud noise when they implode, especially under ultra-high pressure (above 20MPa) conditions, large-sized marine instruments will instantly produce high-decibel noise when they implode, seriously affecting the physical and mental health of test personnel.

[0008] 5. After the sample implodes, it will cause damage to the test fixture bracket, such as breakage and deformation of the fixture bracket, which greatly increases the maintenance cost. The scrapping of the fixture bracket will cause huge waste. Reprocessing a new test fixture bracket will affect the progress of subsequent tests and greatly reduce the test efficiency. Summary of the invention

[0009] In view of the problems existing in the prior art, the present invention provides an implosion protection device and a testing method for a marine instrument water pressure test, which fundamentally solves various problems existing in traditional destructive water pressure tests, ensures the safety of the testing process of the marine instrument destructive water pressure test, and improves the instrument testing and analysis capabilities during the research and development of my country's marine instruments.

[0010] The present invention is implemented by the following technical scheme: an implosion protection device for a marine instrument water pressure test, which is composed of an external bearing component, an internal buffer component, an instrument fixing bracket, and a buffer material layer;

[0011] The external bearing component is a stainless steel cylinder with a smaller inner diameter than the pressure test chamber. The cylinder frame is welded with stainless steel pipes as the keel, and each stainless steel pipe is evenly punched with a plurality of small through holes in the circumferential and axial directions. The cylinder frame is wrapped with a layer of stainless steel perforated plate 1 around and at the bottom, and a detachable stainless steel perforated plate 1 is provided on the top, and small holes are evenly distributed on the stainless steel perforated plate 1.

[0012] The internal buffer component is made of a barrel with a stainless steel bar as the keel, and a layer of stainless steel perforated plate with small holes evenly distributed around and at both ends of the barrel is wrapped. The stainless steel perforated plate on the upper part of the barrel is detachable. The inner surface of the internal buffer component is sprayed with a polyurea coating, and a buffer material layer is arranged on the outer wall around the internal buffer component. The end caps at both ends of the internal buffer component are covered with a buffer material layer with the same diameter as the end caps; after the buffer material layer is arranged, the maximum outer diameter of the internal buffer component is equal to the inner diameter of the external load-bearing component, or is slightly smaller than the inner diameter of the external load-bearing component, so that the internal buffer component is located inside the external load-bearing component and fits tightly with the external load-bearing component;

[0013] The instrument fixing bracket is located in the internal buffer component and is detachably fixed on the internal buffer component, and is used to clamp and fix the ocean instrument to be tested. At the same time, buffer material layers are arranged above and below the ocean instrument to be tested.

[0014] Furthermore, the diameter of the small holes of the stainless steel punching plate is 8 mm to 10 mm.

[0015] Furthermore, the buffer material layer is high-hardness EVA cotton, and the high-hardness EVA cotton is fixed to the surrounding outer walls and end covers of the internal buffer component by rivets, bolts, or strong adhesive.

[0016] Furthermore, the external load-bearing component is made of 304 or 316L stainless steel.

[0017] Furthermore, the internal buffer component is made of 304 or 316L stainless steel.

[0018] Furthermore, the instrument fixing bracket includes two clamps and two fixing bolts. Each clamp is a Y-shaped structure, and one end of the clamp is provided with an external thread. The clamp passes through a small hole on the internal buffer component and is threadedly connected to the fixing bolt to fix it on the internal buffer component.

[0019] Further preferably, a ring-shaped high-hardness EVA cotton is provided between the two clamps and the ocean instrument to be tested.

[0020] The present invention also provides a method for testing a marine instrument water pressure test, comprising the following steps:

[0021] 1) Measuring the inner cavity volume of the oceanographic instrument to be tested, and filling the inner cavity volume of the oceanographic instrument to be tested with a soft filling material that accounts for 60% to 70% of the inner cavity volume;

[0022] 2) The oceanographic instrument to be tested is firmly installed in the internal buffer assembly with the circular high-hardness EVA cotton and the instrument fixing bracket; wherein, the internal buffer assembly is filled with circular high-hardness EVA cotton of different thicknesses layer by layer at the bottom according to the height of the oceanographic instrument to be tested, so that the oceanographic instrument to be tested is in the middle of the internal buffer assembly, and then covered with the EVA hollow circular plate, and the barrel cover is locked;

[0023] 3) The outer wall and the end caps of the internal buffer assembly on which the oceanographic instrument to be tested is installed are provided with a buffer material layer, and then the assembly is placed in the external bearing assembly and placed in the middle position, and the cylindrical end caps are closed to obtain the oceanographic instrument to be tested equipped with an implosion protection device;

[0024] 4) Then use an overhead crane to hoist the marine instrument to be tested equipped with an implosion protection device into the pressure test chamber as a whole, and ensure that it does not contact the inner wall of the pressure test chamber, and seal the pressure test chamber;

[0025] 5) Start the water pressure test, turn on the booster pump, and slowly increase the pressure at a rate not exceeding 2 MPa / min until the theoretical limit pressure of the tested oceanographic instrument is reached, and maintain the pressure for 30 minutes;

[0026] 6) Open the pressure relief valve and reduce the pressure in the pressure test chamber to 0. After eliminating the residual pressure, take out the tested oceanographic instrument after the implosion for analysis and inspection.

[0027] Furthermore, in step 5), if the tested ocean instrument is not damaged, the pressure is continuously increased by 5% or 10% of the designed theoretical limit pressure, and the pressure is maintained for 5 minutes in each stage until the tested ocean instrument implodes.

[0028] The advantages and positive effects of the present invention are:

[0029] 1. The tested ocean instrument of the present invention adopts multi-layer protection, namely, external load-bearing components, internal buffer components, instrument fixing brackets, and buffer material layers (the buffer material layer can be thickened or thinned according to the size of the tested ocean instrument to ensure that the tested ocean instrument is located in the center of the device), which can effectively slow down the energy of shock waves and reflected shock waves, reduce the damage caused by pressure shock, and protect the test instrument; the multi-layer protection structure is combined together, has strong deformation resistance, is not easy to be damaged, greatly reduces the maintenance cost of the device, and improves the test efficiency.

[0030] 2. The instrument fixing bracket used when installing the tested ocean instrument of the present invention can make the tested ocean instrument suspended in the air and as far away from the pressure test chamber wall as possible, avoid being close to the pressure test chamber side wall, and reduce the direct contact damage of the shock wave to the high-pressure chamber body.

[0031] 3. The surfaces of the external bearing assembly and the internal buffer assembly of the present invention are equipped with a filter screen made of a stainless steel punching plate, which can block the test debris in the implosion protection device to prevent it from flowing back to the pressure relief pipeline and valve along with the test medium during pressure relief.

[0032] 4. The soft filling material of the present invention can be adjusted according to the inner cavity volume of the oceanographic instrument to be tested, thereby reducing the space inside the instrument and the damage impact, while not changing the original support strength of the instrument and reducing test interference.

[0033] 5. The stainless steel mesh cage structure and the spraying of the internal polyurea material of the present invention can reduce the decibel of the sound when the tested ocean instrument implodes by more than 50%, which is beneficial to the physical and mental health of the test personnel.

[0034] 6. The polyurea coating sprayed on the internal buffer component of the present invention can effectively slow down the shock wave and effectively attenuate the energy of the reflected shock wave.

[0035] 7. The installation method of the oceanographic instrument to be tested of the present invention can effectively reduce the wear of the oceanographic instrument to be tested and the bulkhead when the instrument is lowered into the pressure test chamber at the beginning of the test and when it is taken out of the test chamber after the test.

[0036] 8. The present invention can solve the problem of pressure shock to the test chamber when the marine instrument implodes during the water pressure test, the problem that the test instrument cannot be recovered and analyzed after being crushed, and the safety problem of instrument residue blocking the pipeline after destructive testing, ensuring the safety and reliability of the marine instrument implosion test test process, and can effectively improve the research and development efficiency of marine instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the specific embodiments. Obviously, the drawings described below are some specific embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0038] Figure 1 A schematic diagram of the structure of an implosion protection device for a marine instrument water pressure test provided by an embodiment of the present invention;

[0039] Figure 2 A schematic cross-sectional structure diagram of an external load-bearing bracket provided in an embodiment of the present invention;

[0040] Figure 3 A schematic diagram of the structure of an internal buffer bracket provided by an embodiment of the present invention;

[0041] Figure 4 A schematic cross-sectional structure diagram of an internal buffer bracket provided in an embodiment of the present invention;

[0042] Figure 5 A schematic diagram of the structure of an instrument fixing bracket provided in an embodiment of the present invention;

[0043] Figure 6 A schematic diagram of the structure of a pressure testing system provided in an embodiment of the present invention.

[0044] Description of reference numerals:

[0045] 1. External load-bearing components; 1-1. Stainless steel pipe; 1-1-1. Small through hole; 1-2. Stainless steel perforated plate 1; 2. Internal buffer components; 2-1. Stainless steel bar; 2-2. Stainless steel perforated plate 2; 3. Instrument fixing bracket; 3-1. Clamp; 3-2. Fixing bolt; 4. Buffer material layer; 5. Pressure test chamber; 5-1. Sealing end cover; 6. Booster pump; 7. Marine instrument to be tested. DETAILED DESCRIPTION

[0046] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "one", "two", and "three" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] See also Figure 1 to Figure 6 This embodiment provides an implosion protection device for a marine instrument water pressure test, which is composed of an external bearing component 1, an internal buffer component 2, an instrument fixing bracket 3, and a buffer material layer 4.

[0050] The external bearing component 1 is a stainless steel cylinder which is 100mm smaller than the inner diameter of the pressure test chamber. The cylindrical skeleton is welded by 8 stainless steel pipes 1-1 with a diameter of 100mm as a keel. Each stainless steel pipe 1-1 is evenly punched with multiple small through holes 1-1-1 in the circumferential and axial directions to facilitate the flow of water in and out to balance the pressure. The cylindrical skeleton is wrapped with a layer of stainless steel perforated plate 1-2 around and on the bottom, and a detachable stainless steel perforated plate 1-2 is provided on the upper part as an end cover, and small holes are evenly distributed on the stainless steel perforated plate 1-2.

[0051] The internal buffer component 2 is made of a barrel with a stainless steel rod 2-1 as the keel, and a layer of stainless steel perforated plate 2-2 evenly distributed with small holes is wrapped around the barrel and at both ends, which can timely discharge water and buffer pressure, has small flow resistance, speeds up water entry during the test, and improves the test efficiency; the stainless steel perforated plate mesh surface is flat and smooth, and it is not easy to scratch the sample; the inner surface of the internal buffer component 2 is sprayed with a polyurea coating, which effectively reduces the impact of the implosion and improves the utilization rate of the device; a buffer material layer 4 is set on the outer wall around the internal buffer component 2, and the end covers at both ends of the internal buffer component 2 are covered with a buffer material layer 4 with the same diameter as the end cover in the same way; after the buffer material layer 4 is set, the maximum outer diameter of the internal buffer component 2 is equal to the inner diameter of the external load-bearing component 1, or slightly smaller than the inner diameter of the external load-bearing component 1, so that the internal buffer component 2 is located in the external load-bearing component 1 and fits tightly with the external load-bearing component 1.

[0052] The instrument fixing bracket 3 is located in the internal buffer component 2 and is detachably fixed on the internal buffer component 2 to clamp and fix the ocean instrument 7 to be tested. At the same time, a buffer material layer 4 is arranged above and below the ocean instrument 7 to be tested.

[0053] As a preferred embodiment, the diameters of the small holes of the stainless steel perforated plate 1-2 and the stainless steel perforated plate 2-2 are 8mm to 10mm respectively, which can timely discharge water and buffer pressure, have small flow resistance, accelerate water entry during the test, and improve test efficiency; the stainless steel perforated plate mesh is flat and smooth, and it is not easy to scratch the sample. The stainless steel perforated plate can effectively prevent the loss of small particle sample fragments after explosion and shrinkage, and is used to collect sample fragments for later experimental analysis.

[0054] As a preferred embodiment, the buffer material layer 4 is high-hardness EVA cotton, which is fixed in a ring shape on the surrounding outer walls of the internal buffer component 2 and in a circular shape on the end covers of the internal buffer component 2 by means of rivets, bolts, or strong glue. The high-hardness EVA cotton has a small deformation amount and low water absorption rate under water pressure conditions, and is suitable as a buffer material.

[0055] As a preferred embodiment, the external load-bearing component 1 is made of 304 or 316L stainless steel to ensure the strength of the external load-bearing component 1.

[0056] As a preferred embodiment, the internal buffer component 2 is made of 304 or 316L stainless steel to ensure the strength of the internal buffer component 2.

[0057] As a preferred embodiment, the instrument fixing bracket 3 includes two clamps 3-1 and two fixing bolts 3-2. Each of the clamps 3-1 is a Y-shaped structure. One end of the clamp 3-1 is provided with an external thread. The clamp 3-1 passes through the small hole on the internal buffer component 2 and is threadedly connected with the fixing bolt 3-2, so that it can be firmly fixed on the internal buffer component 2.

[0058] As a preferred embodiment, a circular high-hardness EVA cotton is provided between the two clamps 3 - 1 and the ocean instrument 7 to be tested, so as to prevent the clamps from damaging the ocean instrument 7 to be tested.

[0059] A method for testing a marine instrument water pressure test comprises the following steps:

[0060] 1) Measure the inner volume of the oceanographic instrument 7 to be tested, and fill the inner volume of the oceanographic instrument 7 with a water bottle, a wooden strip, or a soft filling material such as a cushioning foam, which accounts for 60% to 70% of the inner volume of the oceanographic instrument 7 to be tested. The soft filling material should not be in close contact with the inner volume of the oceanographic instrument 7 to be tested;

[0061] 2) The ocean instrument 7 to be tested is firmly installed in the internal buffer component 2 with the circular high-hardness EVA cotton and the instrument fixing bracket 3; wherein, the internal buffer component 2 is filled with circular high-hardness EVA cotton of different thicknesses layer by layer at the bottom according to the height of the ocean instrument 7 to be tested, and the ocean instrument 7 to be tested is placed in the middle of the internal buffer component 2 as much as possible to avoid contact with the side wall, and then covered with the EVA hollow circular plate, and the barrel cover is locked;

[0062] 3) The outer wall and the end covers of the internal buffer assembly 2 on which the oceanographic instrument 7 to be tested is installed are provided with a buffer material layer 4, and then the internal buffer assembly 2 is placed in the external bearing assembly 1 and placed in the middle position, and the cylindrical end covers are closed to obtain the oceanographic instrument 7 to be tested equipped with an implosion protection device;

[0063] 4) Then, the oceanographic instrument 7 equipped with the explosion protection device is hoisted into the pressure test chamber 5 as a whole by using an overhead crane, and it is ensured that it does not contact the inner wall of the pressure test chamber 5, and the sealing end cover 5-1 is installed on the pressure test chamber 5 to seal the pressure test chamber 5;

[0064] 5) Start the water pressure test, start the booster pump 6, and slowly increase the pressure at a rate not exceeding 2 MPa / min until the theoretical limit pressure of the tested oceanographic instrument is reached, and maintain the pressure for 30 minutes;

[0065] 6) Open the pressure relief valve and reduce the pressure in the pressure test chamber 5 to 0. After eliminating the residual pressure, take out the tested oceanographic instrument after the implosion for analysis and inspection.

[0066] As a preferred embodiment, in step 5), if the tested ocean instrument is not damaged, the pressure is continuously increased at a gradient of 5% or 10% of the designed theoretical limit pressure, and the pressure is maintained for 5 minutes in each stage until the tested ocean instrument implodes.

[0067] The present invention can solve the problem of pressure shock to the test chamber when the marine instrument implodes during the water pressure test, the problem that the test instrument cannot be recovered and analyzed after being crushed, and the safety problem of instrument residue blocking the pipeline after destructive testing, thereby ensuring the safety and reliability of the marine instrument implosion test test process and effectively improving the research and development efficiency of marine instruments.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An implosion protection device for a marine instrument water pressure test, characterized in that: It consists of an external load-bearing component, an internal buffer component, an instrument fixing bracket, and a buffer material layer; The external bearing component is a stainless steel cylinder with a smaller inner diameter than the pressure test chamber. The cylinder frame is welded with stainless steel pipes as the keel, and each stainless steel pipe is evenly punched with a plurality of small through holes in the circumferential and axial directions. The cylinder frame is wrapped with a layer of stainless steel perforated plate 1 around and at the bottom, and a detachable stainless steel perforated plate 1 is provided on the top, and small holes are evenly distributed on the stainless steel perforated plate 1. The internal buffer component is made of a barrel with a stainless steel bar as the keel, and a layer of stainless steel perforated plate with small holes evenly distributed around and at both ends of the barrel is wrapped. The stainless steel perforated plate on the upper part of the barrel is detachable. The inner surface of the internal buffer component is sprayed with a polyurea coating, and a buffer material layer is arranged on the outer wall around the internal buffer component. The end caps at both ends of the internal buffer component are covered with a buffer material layer with the same diameter as the end caps; after the buffer material layer is arranged, the maximum outer diameter of the internal buffer component is equal to the inner diameter of the external load-bearing component, or is slightly smaller than the inner diameter of the external load-bearing component, so that the internal buffer component is located inside the external load-bearing component and fits tightly with the external load-bearing component; The instrument fixing component is located in the internal buffer component and is detachably fixed on the internal buffer component, and is used to clamp and fix the ocean instrument to be tested. At the same time, buffer material layers are arranged above and below the ocean instrument to be tested.

2. The marine instrument water pressure test implosion protection device according to claim 1, characterized in that: The diameter of the small holes of the stainless steel punching plate is 8 mm to 10 mm.

3. The marine instrument water pressure test implosion protection device according to claim 1, characterized in that: The buffer material layer is high-hardness EVA cotton, which is fixed to the surrounding outer walls and end covers of the internal buffer component by rivets, bolts, or strong adhesive.

4. The marine instrument water pressure test implosion protection device according to claim 1, characterized in that: The external bearing component is made of 304 or 316L stainless steel.

5. The marine instrument water pressure test implosion protection device according to claim 1, characterized in that: The internal buffer component is made of 304 or 316L stainless steel.

6. The marine instrument water pressure test implosion protection device according to claim 1, characterized in that: The instrument fixing bracket includes two clamps and two fixing bolts. Each clamp is a Y-shaped structure. One end of the clamp is provided with an external thread. The clamp passes through a small hole on the internal buffer component and is threadedly connected to the fixing bolt to fix it on the internal buffer component.

7. The marine instrument water pressure test implosion protection device according to claim 6, characterized in that: A circular high-hardness EVA cotton is arranged between the two clamps and the oceanographic instrument to be tested.

8. A method for testing a marine instrument water pressure test, characterized in that: The steps include: 1) Measuring the inner cavity volume of the oceanographic instrument to be tested, and filling the inner cavity volume of the oceanographic instrument to be tested with a soft filling material that accounts for 60% to 70% of the inner cavity volume; 2) The oceanographic instrument to be tested is firmly installed in the internal buffer component with the circular high-hardness EVA cotton and the instrument fixing bracket. The internal buffer component is filled with circular high-hardness EVA cotton of different thicknesses layer by layer at the bottom according to the height of the oceanographic instrument to be tested, so that the oceanographic instrument to be tested is in the middle of the internal buffer component; then the EVA hollow circular plate is covered and the barrel cover is locked; 3) The outer wall and the end caps of the internal buffer assembly on which the oceanographic instrument to be tested is installed are provided with a buffer material layer, and then the assembly is placed in the external bearing assembly and placed in the middle position, and the cylindrical end caps are closed to obtain the oceanographic instrument to be tested equipped with an implosion protection device; 4) Then use an overhead crane to hoist the marine instrument to be tested equipped with an implosion protection device into the pressure test chamber as a whole, and ensure that it does not contact the inner wall of the pressure test chamber, and seal the pressure test chamber; 5) Start the water pressure test, turn on the booster pump, and slowly increase the pressure at a rate not exceeding 2 MPa / min until the theoretical limit pressure of the tested oceanographic instrument is reached, and maintain the pressure for 30 minutes; 6) Open the pressure relief valve and reduce the pressure in the pressure test chamber to 0. After eliminating the residual pressure, take out the tested oceanographic instrument after the implosion for analysis and inspection.

9. The method for testing the marine instrument water pressure test according to claim 8, characterized in that: In step 5), if the tested ocean instrument is not damaged, the pressure is continuously increased by 5% or 10% of the designed theoretical limit pressure, and the pressure is maintained for 5 minutes in each stage until the tested ocean instrument implodes.

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