CN115753581A - Deep sea environment corrosion test device and test guarantee method - Google Patents
Deep sea environment corrosion test device and test guarantee method Download PDFInfo
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- CN115753581A CN115753581A CN202211500519.7A CN202211500519A CN115753581A CN 115753581 A CN115753581 A CN 115753581A CN 202211500519 A CN202211500519 A CN 202211500519A CN 115753581 A CN115753581 A CN 115753581A
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Abstract
The invention relates to a deep sea environment corrosion test device and a test guarantee method, the deep sea environment corrosion test device comprises a hollowed sample frame, a plurality of buoyancy blocks are arranged inside the sample frame, the top surface of the outside of the sample frame is connected with a beacon, the bottom surface of the outside of the sample frame is connected with a non-torque connecting mechanism through a first connecting rope, the non-torque connecting mechanism is positioned under the sample frame, the non-torque connecting mechanism is connected with the output end of an underwater winch through a cable, the bottom of the underwater winch is connected with the upper surface of a base, battery packs and watertight pressure-resistant shells which are positioned at two sides of the underwater winch are further fixed on the upper surface of the base, underwater acoustic communication antennas are arranged on the upper surface of the watertight pressure-resistant shells, a control system is arranged inside the watertight pressure-resistant shells, the base is connected with ballast blocks through an acoustic response releaser, and the ballast blocks are positioned under the base. The testing device is completely positioned below the sea surface in the testing period, is slightly influenced by sea conditions and passing ships, has high reliability and is convenient to distribute and recover.
Description
Technical Field
The invention relates to the technical field of marine environment corrosion tests, in particular to a deep sea environment corrosion test device and a test guarantee method.
Background
Seawater is an electrolyte solution with relatively high corrosivity, is one of the most corrosive media in natural corrosive agents, and common metal materials all generate corrosion problems to different degrees in seawater. In order to ensure long-term safe and reliable service of marine equipment, the corrosion behavior of the material in a seawater environment needs to be fully mastered.
The Chinese invention patent is disclosed, the publication number is: CN110057747B, patent name: the utility model provides a can realize throwing corrosion test device of appearance deep water alternating, application date: 20190524 discloses a corrosion test device capable of realizing sample throwing water depth alternation, and the function of alternating water depth positions of a test frame in a marine environment corrosion test can be realized by arranging a buoyancy tank, a winch system, a main cable, the test frame, an automatic reel and a concrete ballast block. However, the main system blocks of the device are all located on the sea surface, and during a long-period deep sea test, the main system of the device needs to bear the impact of sea waves all the time, and when the device is subjected to an extremely severe sea condition, the mooring cables of the whole device can be broken; meanwhile, the test device floats on the sea surface and is greatly influenced by passing ships, and the test device is exposed to higher risks of being scraped and dragged away, so that the deep sea corrosion test fails. Therefore, it is necessary and urgent to develop a deep sea environmental corrosion test device which can be placed below the sea surface, is convenient to deploy and retrieve, has high reliability, and is less affected by sea conditions and passing ships.
Disclosure of Invention
The applicant aims at the defects in the prior art and provides a deep sea environment corrosion test device which is reasonable in structure and can automatically adjust the underwater position. The problem that a main system of the test device in the background art is easily damaged when being positioned on the sea surface is solved.
The technical scheme adopted by the invention is as follows:
the utility model provides a deep sea environment corrosion test device, sample frame including the fretwork, sample frame's inside is provided with several buoyancy piece, the beacon is connected to the outside top surface of sample frame, the outside underrun of sample frame is connected with no torque connection mechanism through first connection rope, no torque connection mechanism is located sample frame under, no torque connection mechanism passes through the hawser and is connected with winch's output under water, the upper surface of base is connected to winch's bottom under water, the upper surface of base still is fixed with the group battery and the withstand voltage casing that are located winch both sides under water, the upper surface of withstand voltage casing of watertight is provided with the underwater acoustic communication antenna, withstand voltage casing's inside is provided with control system, the base passes through the acoustic response releaser and is connected with the ballast piece, the ballast piece is located the base under.
The further technical scheme of the invention is as follows:
the buoyancy provided by the buoyancy block is greater than the gravity borne by the test device except the ballast block and is less than the gravity borne by the test device comprising the ballast block.
The sample frame is cubic, and the four corners of the lower surface of the sample frame are uniformly provided with fixing parts for connecting cables.
The torque-free connecting mechanism comprises a first connecting ring and a second connecting ring which are oppositely connected, through holes are formed in the middle of the first connecting ring and the middle of the second connecting ring, and the first connecting ring and the second connecting ring are connected in a clearance fit mode through bolts.
And a sample material, an altimeter and a marine environment detector are also arranged in the sample frame.
The watertight pressure-resistant shell is made of titanium alloy or duplex stainless steel.
And the control system, the battery pack and the underwater winch in the watertight pressure-resistant shell are electrically connected through a watertight connector.
The battery pack is formed by combining a plurality of high specific energy single lithium batteries, and mineral oil is filled between the high specific energy single lithium batteries.
The acoustic response releaser is connected with base and ballast piece respectively through the second and is connected the rope, and the length that the rope was connected to the second is all the same.
A test guarantee method using the deep sea environment corrosion test device comprises the following steps:
s1, preparing, before a sea test, determining a water depth position change scheme of a sample frame in the whole test period, setting relevant control instructions in a control system in a watertight pressure-resistant shell, installing sample materials on the sample frame, assembling other modules of the test device, and ensuring safe and reliable connection among the modules;
s2, capability verification, namely, controlling the capability of the underwater winch to release or recover the cable by the examination control system, and performing a sea test after the examination test;
s3, preparing before throwing, completely recovering the mooring rope into the underwater winch, and determining that the beacon, the acoustic response releaser and the battery pack are all in a full-power state;
s4, putting the test device through a working ship, carrying lifting equipment on the working ship, putting all modules of the test device into seawater from top to bottom in sequence when the working ship reaches a target putting point, putting a beacon at first, then putting a sample frame, putting a non-torque connecting shaft, then putting a base and a ballast block, and restraining the ballast block through the lifting equipment when putting the ballast block, so that the ballast block is ensured to be positioned at the sea surface and not to sink, and the advancing direction of the working ship is opposite to the direction of sea waves when putting;
s5, hoisting the ballast block, releasing the ballast block from the sea surface position, and enabling other modules of the test device to sink under the action of the gravity of the ballast block;
s6, after the ballast block sits at the bottom, the sample frame hovers in the seawater under the combined action of the buoyancy block mooring ropes;
s7, the working ship is communicated with a control system through an underwater acoustic communication antenna, and the altimeter returns water depth position information of the sample frame to the working ship in real time;
s8, after the water depth position information received by the working ship stops changing, the working ship sends an instruction to the control system, so that the underwater winch releases a mooring rope with the length required by the instruction, the sample frame starts to float upwards under the action of buoyancy, finally hovers at the initial test water depth position formulated by the test scheme, and a long-period deep sea environment corrosion test is started;
s9, sample materials are recovered, after the test period is finished, the working ship returns to a release point, signals of the acoustic response releaser are transmitted to the control system through the underwater acoustic communication antenna, the control system releases the signals to the acoustic response releaser, the acoustic response releaser opens the release hook, the upper portion and the lower portion of the release hook are separated, the ballast block is abandoned, the sample frame starts to float, finally the test device floats to the sea surface, the position information of the test device can be accurately obtained through the beacon working ship, and the test device is recovered through the hoisting equipment.
The invention has the following beneficial effects:
the device has compact and reasonable structure and convenient operation, controls the underwater winch to release or recover the mooring rope with specific length periodically through the underwater control module, and enables the sample frame to hover at the preset test water depth position, thereby realizing the automatic adjustment of the underwater position of the sample frame in the test period and being convenient to lay and recover; during the deep sea test, the whole device is completely positioned below the sea surface, is slightly influenced by sea conditions and passing ships, and has high reliability.
The invention also has the following advantages:
(1) By arranging the torque-free connecting mechanism, the test device can effectively avoid the problem of cable twisting and winding caused by sample frame rotation caused by ocean current during the whole underwater test.
(2) Mineral oil is filled in the battery pack, so that the deep sea bearing capacity of the battery pack can be guaranteed, and heat generated inside the battery pack can be timely transferred to seawater to relieve the heating condition of the battery pack.
(3) Through setting up the beacon, the work ship can accurate acquisition test device's positional information to guarantee that test device can retrieve.
(4) Through setting up control system, the test device need not the assistance of surface of water work ship, can independently accomplish the automatically regulated of sample frame depth of water position in whole experimental period.
(5) Each module of the testing device is made of seawater corrosion resistant materials, so that the testing device is suitable for deep sea environment, and the test can be smoothly completed.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the torque-free coupling mechanism of the present invention.
Wherein: 1. a beacon; 2. a buoyancy block; 3. a sample frame; 4. a sample material; 5. a first connecting rope; 6. an altimeter; 7. a torque-free coupling mechanism; 8. a cable; 9. an underwater winch; 10. a battery pack; 11. a watertight pressure-resistant casing; 12. an underwater acoustic communications antenna; 13. a base; 14. a second connecting rope; 15. an acoustic response releaser; 16. a ballast block; 17. a marine environment detector;
701. a first connecting ring; 702. a second connection ring; 703. and (4) bolts.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
The first embodiment is as follows:
the structure and function of the deep sea environment corrosion test device provided by the embodiment are as follows:
as shown in fig. 1-2, a deep sea environment corrosion test device comprises a hollowed sample frame 3, a plurality of buoyancy blocks 2 are arranged inside the sample frame 3, a beacon 1 is connected to the top surface outside the sample frame 3, the bottom surface outside the sample frame 3 is connected with a non-torque connecting mechanism 7 through a first connecting rope 5, the non-torque connecting mechanism 7 is located right below the sample frame 3, the non-torque connecting mechanism 7 is connected with the output end of an underwater winch 9 through a cable 8, the bottom of the underwater winch 9 is connected with the upper surface of a base 13, battery packs 10 and watertight pressure-resistant shells 11 which are located on two sides of the underwater winch 9 are further fixed to the upper surface of the base 13, underwater acoustic communication antennas 12 are arranged on the upper surface of the watertight pressure-resistant shells 11, a control system is arranged inside the watertight pressure-resistant shells 11, the base 13 is connected with a ballast block 16 through an acoustic response releaser 15, and the ballast block 16 is located right below the base 13. The cable 8 is made of poly-p-phenylene terephthamide; the base 13 is made of high-strength engineering plastics such as polyamide and polycarbonate; the ballast mass 16 is made of relatively low cost concrete.
The buoyancy block 2 provides a buoyancy force greater than the weight force experienced by the test apparatus except for the ballast block 16 and less than the weight force experienced by the test apparatus including the ballast block 16.
The sample frame 3 is in a cubic shape, and fixing parts for connecting cables 8 are uniformly arranged at four corners of the lower surface of the sample frame 3.
The torque-free connection mechanism 7 comprises a first connection ring 701 and a second connection ring 702 which are oppositely connected, through holes are arranged in the middle of the first connection ring 701 and the second connection ring 702, and the first connection ring 701 and the second connection ring 702 are connected through clearance fit with bolts 703. The torque-free connecting mechanism 7 can effectively avoid the problem that a cable 8 is twisted and wound due to rotation of the sample frame 3 caused by ocean current, in the working process of the test device, the first connecting rope 5 is fixedly connected with the first connecting ring 701, the cable 8 is fixedly connected with the second connecting ring 702, and the bolt 703 penetrates through holes in the middle parts of the first connecting ring 701 and the second connecting ring 702 to be connected with through holes in the middle parts of the first connecting ring 701 and the second connecting ring 702; the buoyancy provided by the buoyancy block 2 enables the first connecting ring 701 to have a upward-floating movement trend, the gravity provided by the ballast block 16 enables the second connecting ring 702 to have a downward-sinking movement trend, so that the first connecting ring 701 and the second connecting ring 702 are separated, the end surfaces of the first connecting ring 701 and the second connecting ring 702 are not in contact, the first connecting ring 701 and the second connecting ring 702 are in clearance fit with the bolt 703, when the sample frame 3 rotates due to ocean current or other factors to drive the first connecting ring 701 to rotate, the first connecting ring 701 can freely rotate around the connecting pin shaft, the second connecting ring 702 is not influenced by the first connecting ring 701, and therefore the problem that a rope used in the test device is twisted and wound can be avoided.
The sample frame 3 is also internally provided with a sample material 4, a height gauge 6 and a marine environment detector 17.
The material of the watertight pressure-resistant shell 11 is titanium alloy or duplex stainless steel.
The control system, the battery pack 10 and the underwater winch 9 inside the watertight pressure casing 11 are electrically connected through watertight connectors. The battery pack 10 provides the control system and subsea winch 9 inside the watertight pressure housing 11 with the electrical energy required for operation.
The battery pack 10 is formed by combining a plurality of high specific energy single lithium batteries, and mineral oil is filled between the high specific energy single lithium batteries. The filled mineral oil can ensure the deep sea bearing capacity of the battery pack 10, and can also transmit the heat generated in the battery pack 10 to the seawater in time, thereby relieving the heating condition of the battery pack 10.
The acoustic transponder releaser 15 is connected with the base 13 and the ballast block 16 through the second connecting ropes 14 respectively, and the lengths of the second connecting ropes 14 are the same, so that the base 13 is ensured to be in a horizontal position when suspended in seawater.
The beacon 1 is used for providing accurate position coordinates of the test device when the test is finished and the sample material 4 is recovered, the height meter 6 is used for marking the underwater position height of the sample frame 3, and the underwater acoustic communication antenna 12 is used for carrying out information transmission with a surface working ship.
A control system in the watertight pressure-resistant shell 11 adopts a PLC module and is used for controlling the working state of the underwater winch 9; the underwater winch 9 has locking and braking functions, and the main structure material of the underwater winch is titanium alloy or duplex stainless steel resistant to seawater corrosion.
By adopting the deep sea environment corrosion test device, the test device needs to perform a deep sea environment corrosion test in seawater for 12 months, and during the test, the sample material 4 needs to perform corrosion tests in seawater with a depth of 500 meters and a depth of 1000 meters respectively, and the embodiment provides a deep sea environment corrosion test guarantee method, which comprises the following steps:
s1, preparing, before a sea test, determining a water depth position change scheme of a sample frame 3 in the whole test period, setting a relevant control instruction in a PLC (programmable logic controller) module, installing a sample material 4 on the sample frame 3, assembling other modules of the test device, and ensuring safe and reliable connection among the modules;
s1.1, installing an altimeter 6, a marine environment detector 17 and a buoyancy block 2 into a sample frame 3, wherein the installation position of the altimeter 6 is positioned above the installation position of a sample material 4;
s1.2, connecting the beacon 1 to the top side of the outer surface of the sample frame 3;
s1.3, preparing two first connecting ropes 5 with equal length, connecting one of the first connecting ropes 5 with two fixing parts at opposite angles of the lower surface of the sample frame 3 through a first connecting ring 701, and connecting the other connecting rope with the other two fixing parts at the lower surface of the sample frame 3 through the first connecting ring 701;
s1.4, connecting one end of a cable 8 with a second connecting ring 702, and winding the other end of the cable 8 on the output end of an underwater winch 9;
s1.5, fixing a control system inside a watertight pressure-resistant shell 11, and fixing an underwater acoustic communication antenna 12 on the upper surface of the watertight pressure-resistant shell 11;
s1.6, fixing the underwater winch 9, the battery pack 10 and the watertight pressure-resistant shell 11 on a base 13;
s1.7, uniformly arranging two acoustic response releasers 15 on the lower surface of a base 13 through a second connecting rope 14;
s1.8, connecting an acoustic response releaser 15 and a ballast block 16 through a second connecting rope 14;
s2, capability verification, namely, controlling the capability of the underwater winch 9 to release or recover the cable 8 by the examination control system, and carrying out a sea test after the examination test;
s3, preparing before throwing, recovering all the mooring ropes 8 into the underwater winch 9, and determining that the beacon 1, the acoustic response releaser 15 and the battery pack 10 are in a full-power state;
s4, putting the test device on a working ship, and carrying hoisting equipment on the working ship to put and recover the test device;
s4.1, when the mooring rope 8 is completely recovered, the vertical distance between the installation position of the height gauge 6 and the lower surface of the ballast block 16 is 7 meters, and a sea area with the sea depth of 1050 meters-1100 meters can be selected for testing;
s4.2, when the working ship reaches a target release point, sequentially releasing each module of the test device into seawater from top to bottom, firstly releasing the beacon 1, then releasing the sample frame 3, then releasing the non-torque connecting mechanism 7, then releasing the base 13 and the ballast block 16, and when releasing the ballast block 16, restraining the ballast block 16 through lifting equipment to ensure that the ballast block 16 is positioned on the sea surface and cannot sink;
s4.3, the advancing direction of the working ship is opposite to the direction of sea waves when the working ship is thrown in, so that the modules can be flatly laid on the sea surface after being thrown in, and ropes are prevented from being wound and knotted;
s5, hoisting the ballast block 16, releasing the ballast block 16 from the sea surface, and enabling other modules of the test device to sink under the action of gravity of the ballast block 16;
s6, after the ballast block 16 is seated, the sample frame 3 hovers at the offshore bottom under the combined action of the buoyancy block 2 and the pulling force of the cable 8;
s7, the working ship is communicated with a control system through an underwater acoustic communication antenna 12, the altimeter 6 returns the water depth position information of the sample frame 3 to the working ship in real time, and the position information returned by the altimeter 6 is corrected by a computer carried on the working ship, so that the water depth position of the sample material 4 can be accurately reflected;
s8, when the water depth position information received by the working ship does not change any more, according to the position information returned by the altimeter 6 at the moment, the working ship sends an instruction to the control system to enable the underwater winch 9 to release the mooring rope 8 with a certain length so as to ensure that the sample frame 3 is suspended at the position with the water depth of 1000 meters, and then a long-period deep sea environment corrosion test is started;
s8.1, in the whole test period, the control system controls the underwater winch 9 to release or recover the mooring rope 8 with the set length periodically according to a preset periodic work instruction, and the test device can independently complete the automatic adjustment of the water depth position of the sample frame 3 in the whole test period without the assistance of a water surface working ship;
s8.2, when the test period reaches the 6 th month, the sample frame 3 needs to float to the position 500 m deep in water, and according to a preset instruction, the control system can control the underwater winch 9 to release the mooring rope 8 500 m long after the timing reaches 6 months, and the sample frame 3 floats and hovers to the position 500 m deep in seawater;
s9, recovering the sample material 4, after the 12-month test is finished, returning the working ship to a release point, transmitting a signal of a release acoustic response releaser 15 to a control system through an underwater acoustic communication antenna 12, releasing the signal to the acoustic response releaser 15 by the control system, opening a release hook by the acoustic response releaser 15, separating an upper part and a lower part of the release hook, discarding a ballast block 16, starting the sample frame 3 to float upwards, finally floating the test device to the sea surface, accurately acquiring the position information of the test device through the working ship of the beacon 1, recovering the test device through hoisting equipment, simply washing, drying and packaging the sample material 4 on the sample frame 3, and taking the sample material back to a laboratory for detailed corrosion analysis.
Example two:
the difference between the present embodiment and the first embodiment is: in this embodiment, the sample material 4 needs to be subjected to corrosion tests in seawater of 1000 meters and 1500 meters, a sea area of 1550 meters to 1600 meters in water depth needs to be selected, and the step of s8.2 in the first embodiment needs to be replaced by the following step:
s8.2, when the test period reaches the 6 th month, the sample frame 3 needs to sink to the position with the water depth of 1500 meters, the control system operates the underwater winch 9 to recover the mooring rope 8 with the length of 500 meters after the timing reaches 6 months according to a preset instruction, and the sample frame 3 sinks and hovers to the position with the depth of 1500 meters.
Example three:
the difference between the present embodiment and the first embodiment is: in this embodiment, the sample material 4 needs to be subjected to corrosion tests for 18 months in seawater of 500 m, 1000 m and 1500 m depth, respectively, a sea area of 1550 m to 1600 m depth needs to be selected, and the following steps are added after the step of s8.2 in the first embodiment:
s8.3, when the test period reaches the 12 th month, the sample frame 3 needs to sink to the position of 1500 m deep water, according to a preset instruction, the control system can control the underwater winch 9 to recover the mooring rope 8 of 1000 m long after the timing reaches 12 months, and the sample frame 3 sinks and hovers to the position of 1500 m deep;
s9, recovering the sample material 4, after the 18-month test is finished, returning the working ship to a release point, transmitting a signal of a release acoustic response releaser 15 to a control system through an underwater acoustic communication antenna 12, releasing the signal to the acoustic response releaser 15 by the control system, opening a release hook by the acoustic response releaser 15, separating an upper part and a lower part of the release hook, discarding a ballast block 16, starting the sample frame 3 to float upwards, finally floating the test device to the sea surface, accurately acquiring the position information of the test device through the working ship of the beacon 1, recovering the test device through hoisting equipment, simply washing, drying and packaging the sample material 4 on the sample frame 3, and taking the sample material back to a laboratory for detailed corrosion analysis.
The test device and the test guarantee method provided by the invention can meet the use requirements that the test device is placed below the sea surface and the seawater depth changes alternately, and are convenient to distribute and recover; meanwhile, the beacon 1 is installed on the testing device, the searching efficiency is improved, meanwhile, the problem of loss of the testing device is effectively avoided, and the reliability is improved.
The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.
Claims (10)
1. The utility model provides a deep sea environment corrosion test device which characterized in that: the underwater test device comprises a hollowed sample frame (3), a plurality of buoyancy blocks (2) are arranged inside the sample frame (3), a beacon (1) is connected with the top surface of the outside of the sample frame (3), the bottom surface of the outside of the sample frame (3) is connected with a non-torque connecting mechanism (7) through a first connecting rope (5), the non-torque connecting mechanism (7) is located under the sample frame (3), the non-torque connecting mechanism (7) is connected with the output end of an underwater winch (9) through a cable (8), the bottom of the underwater winch (9) is connected with the upper surface of a base (13), battery packs (10) and a watertight pressure-resistant shell (11) which are located on two sides of the underwater winch (9) are further fixed on the upper surface of the base (13), an underwater acoustic communication antenna (12) is arranged on the upper surface of the watertight pressure-resistant shell (11), a control system is arranged inside the watertight pressure-resistant shell (11), the base (13) is connected with ballast blocks (16) through an acoustic responder releaser (15), and the ballast blocks (16) are located under the base (13).
2. The deep sea environment corrosion test device according to claim 1, characterized in that: the buoyancy provided by the buoyancy block (2) is greater than the gravity borne by the test device except the ballast block (16) and less than the gravity borne by the test device including the ballast block (16).
3. The deep sea environment corrosion test device according to claim 1, characterized in that: the test sample frame (3) is in a cube shape, and fixing parts for connecting cables (8) are uniformly arranged at four corners of the lower surface of the test sample frame (3).
4. The deep sea environment corrosion test device according to claim 1, characterized in that: the torque-free connecting mechanism (7) comprises a first connecting ring (701) and a second connecting ring (702) which are oppositely connected, through holes are formed in the middles of the first connecting ring (701) and the second connecting ring (702), and the first connecting ring (701) and the second connecting ring (702) are connected in a clearance fit mode through bolts (703).
5. The deep sea environment corrosion test device according to claim 1, characterized in that: and a sample material (4), a height meter (6) and a marine environment detector (17) are also arranged in the sample frame (3).
6. The deep sea environment corrosion test device according to claim 1, characterized in that: the material of the watertight pressure-resistant shell (11) is titanium alloy or duplex stainless steel.
7. The deep sea environment corrosion test device according to claim 1, characterized in that: and the control system, the battery pack (10) and the underwater winch (9) in the watertight pressure-resistant shell (11) are electrically connected through watertight connectors.
8. The deep sea environment corrosion test device according to claim 1, characterized in that: the battery pack (10) is formed by combining a plurality of high-specific-energy single lithium batteries, and mineral oil is filled between the high-specific-energy single lithium batteries.
9. The deep sea environment corrosion test device according to claim 1, characterized in that: the acoustic response releaser (15) is respectively connected with the base (13) and the ballast block (16) through a second connecting rope (14), and the lengths of the second connecting ropes (14) are the same.
10. A test guarantee method using the deep sea environment corrosion test device of claim 1, characterized in that: the method comprises the following steps:
s1, preparing, before a sea test, determining a water depth position change scheme of a sample frame (3) in the whole test period, setting a related control instruction in a control system in a watertight pressure-resistant shell (11), installing a sample material (4) on the sample frame (3), assembling other modules of the test device, and ensuring safe and reliable connection among the modules;
s2, capability verification, namely, the examination control system controls the capability of the underwater winch (9) to release or recover the cable rope (8), and a sea test can be carried out after the examination test;
s3, preparing before throwing, completely recovering the mooring rope (8) into an underwater winch (9), and determining that the beacon (1), the acoustic response releaser (15) and the battery pack (10) are in a full-power state;
s4, putting the test device through a working ship, carrying lifting equipment on the working ship, putting all modules of the test device into seawater from top to bottom in sequence when the working ship reaches a target putting point, putting in the beacon (1) firstly, then putting in the sample frame (3), then putting in the non-torque connecting shaft (7), then putting in the base (13) and the ballast block (16), and when putting in the ballast block (16), restraining the ballast block (16) through the lifting equipment to ensure that the ballast block (16) is positioned at the sea surface position and cannot sink, wherein the advancing direction of the working ship is opposite to the direction of sea waves during putting;
s5, hoisting the ballast block (16), releasing the ballast block (16) from the sea surface position, and beginning sinking other modules of the test device under the action of gravity of the ballast block (16);
s6, after the ballast block (16) is seated, the sample frame (3) is suspended in the seawater under the combined action of the buoyancy block (2) and the cable (8);
s7, the working ship is communicated with a control system through an underwater acoustic communication antenna (12), and the altimeter (6) returns water depth position information of the sample frame (3) to the working ship in real time;
s8, when the water depth position information received by the working ship stops changing, the working ship sends an instruction to the control system, so that the underwater winch (9) releases a mooring rope (8) with the length required by the instruction, the sample frame (3) starts floating under the action of buoyancy, finally hovers at the initial test water depth position formulated by the test scheme, and a long-period deep sea environment corrosion test is started;
s9, sample materials (4) are recovered, after a test period is finished, the working ship returns to a release point, signals of the acoustic response releaser (15) are transmitted to a control system through an underwater acoustic communication antenna (12), the control system releases the signals to the acoustic response releaser (15), a release hook is opened by the acoustic response releaser (15), the upper portion and the lower portion of the release hook are separated, a ballast block (16) is abandoned, the sample frame (3) starts to float upwards, finally the test device floats to the sea surface, the position information of the test device can be accurately obtained through the beacon (1), and the test device is recovered through hoisting equipment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211500519.7A CN115753581A (en) | 2022-11-28 | 2022-11-28 | Deep sea environment corrosion test device and test guarantee method |
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| CN202211500519.7A CN115753581A (en) | 2022-11-28 | 2022-11-28 | Deep sea environment corrosion test device and test guarantee method |
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