Anti-corrosion sensor for monitoring corrosion of in-service FPS0 ballast tank

Abstract

The utility model discloses an anti-corrosion sensor for monitoring corrosion of an in-service FPS0 ballast tank, which comprises a sensor shell, a waterproof cable extending into an inner cavity is arranged on the sensor shell, a silver chloride electrode is arranged at the bottom of the sensor shell, one end of the silver chloride electrode extends into the inner cavity and is electrically connected with the waterproof cable in the inner cavity, and the other end of the silver chloride electrode extends downwards. A flange plate used for sealing the inner cavity is arranged at the top end of the sensor shell, a connecting hole allowing the waterproof cable to extend out is formed in the flange plate, a first connecting part used for sealing and fixing the waterproof cable is arranged on the flange plate, and a second connecting part used for sealing and fixing the silver chloride electrode is arranged at the bottom end of the sensor shell. And the surface of the sensor shell is provided with a fixed connecting device for quickly installing the sensor shell and a rib plate on the inner wall of the ballast tank. Installation can be achieved in the offshore FPSO operation period, damage to a ship body is avoided, thermal treatment is not needed, and rapid installation and replacement can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of ship corrosion protection, and specifically relates to a kind of anticorrosion sensor for in-service FPS0 ballast tank corrosion monitoring. BACKGROUND

[0002] At present, marine economy and marine technology have been promoted to an unprecedented strategic height, and strategic emerging marine industries such as coastal engineering, marine exploitation and offshore energy are rapidly emerging, and many marine engineering such as offshore wind power and offshore platform are also rapidly developing. Marine structures such as offshore wind power and offshore oil platforms are in a harsh marine environment, and the corrosion is serious, accompanied by wave, tide, flow and other impacts. The metal structures of ships, offshore wind power and offshore platforms are immersed in seawater for a long time, and are seriously affected by corrosion. If measures are not taken in time to monitor and prevent corrosion, the structure of the ship body will be damaged, and even the safety of the ship will be affected. Therefore, it is very important to use sensors to measure the potential and corrosion state of the metal structure in real time during the design, construction and operation of marine equipment. The common anti-corrosion technologies for offshore equipment today are impressed current cathodic protection technology and sacrificial anode cathodic protection technology, and the reference electrode (sensor) is an important detection component for monitoring whether the cathodic protection technology is running normally.

[0003] The ballast tank is one of the important factors for FPSO to improve the stability of the ship, and is in a state of frequent dry-wet alternation under seawater ballast and empty ballast for a long time. In addition, the temperature and humidity in the ballast tank are high, and the structure is complex and not easy to clean and maintain, so it becomes one of the most serious parts in each cabin of the ship. The serious corrosion of the ballast tank will threaten the safety of ship navigation and structure. Therefore, the sensor has important significance for monitoring the corrosion of the ballast tank structure and then carrying out reinforcement and corrosion prevention. Today, there are many types of reference electrodes, such as the following patent technologies:

[0004] CN215628310U A fixed reference electrode with replaceable probe, which includes a first flange fixedly connected with one of a water-tight plug male head or a water-tight plug female head, and a cable passing through the first flange and conducting with one of the water-tight plug male head or the water-tight plug female head; a probe provided with the other of the water-tight plug male head or the water-tight plug female head is detachably connected with the first flange through the water-tight plug male head and the water-tight plug female head, and the probe is in conduction with the cable when the probe is connected with the first flange; the probe can detect the corrosion potential of the steel structure of the offshore platform, and transmit the detection result to the detection equipment through the cable arranged in the flange, so as to realize the monitoring of the marine corrosion environment. When the probe is damaged, the probe can be replaced, and the status that the fixed reference electrode cannot be replaced and affects the monitoring of marine underwater data is changed.

[0005] CN105388104A discloses a packaging structure of a reference electrode, comprising: two oppositely arranged electrode supports, electrode support I located at the front end of the packaging structure and electrode support II located at the rear end of the electrode packaging structure, which constitute a high-precision reference electrode and a stable reference electrode of a composite reference electrode system; and a base fixed in parallel with the measured steel structure.

[0006] CN117107247A discloses a reference electrode device suitable for different seawater flow rate environments, comprising a reference electrode assembly, a shell, a mounting piece, and a signal cable, the shell comprising a porous ceramic shell, a semi-permeable membrane, and a natural sponge, the natural sponge being arranged in the porous ceramic shell, the semi-permeable membrane being arranged on the inner wall of the porous ceramic shell, and the semi-permeable membrane being located between the inner wall of the porous ceramic shell and the natural sponge; the reference electrode assembly comprises a high-purity zinc reference electrode, the high-purity zinc reference electrode being at least partially located in the natural sponge, and the signal cable being electrically connected with the high-purity zinc reference electrode; the porous ceramic shell is fixedly connected with the mounting piece, and the mounting piece is used for fixedly connecting with the protected body.

[0007] From the above patent technologies, it can be seen that the existing reference electrodes are researched and improved from the aspects of convenient probe replacement, improved sealing, and improved service life, but there are still some defects in the actual application process. Since the FPSO ballast tank cannot cause damage to the ship body during operation and cannot be subjected to thermal treatment, the reference electrode needs to be installed at a seawater-immersed position, and the installation needs to be performed by punching holes in the ballast tank and fixed on the ship tank wall by bolts, which not only damages the anticorrosive coating on the surface of the tank wall, causing corrosion problems to be aggravated, but also makes it difficult to quickly realize installation in seawater, and it is difficult for maintenance personnel to install in the FPSO ballast tank in service. Therefore, the existing sensor (reference electrode) is not suitable for use in the FPSO ballast tank in operation. In summary, how to realize the installation of the sensor in the FPSO in operation, avoid causing damage to the ship body, do not need to be subjected to thermal treatment, and can realize quick installation in the ballast tank, effectively protect the anticorrosive coating, prolong the service life of the ballast tank, and reduce the anticorrosion maintenance workload, has become a difficult problem to be solved by technical personnel in the field of ocean engineering. Practical new type content

[0008] In order to make up for the above shortcomings, the utility model provides a kind of anticorrosion sensor for corrosion monitoring of FPS0 ballast tank in service, to improve the FPSO ballast tank on sea cannot cause damage to ship body during operation, and cannot be carried out thermal treatment, and reference electrode needs to be installed in seawater immersion position, and installation needs to be punched in ballast tank and fixed on ship cabin bulkhead with bolt, which not only destroys the anticorrosive coating of bulkhead surface, causes corrosion problem to aggravate, and it is difficult to quickly realize installation in seawater operation, it is difficult for maintenance personnel to install in FPSO ballast tank in service.

[0009] The utility model is such implementation: a kind of anticorrosion sensor for corrosion monitoring of FPS0 ballast tank in service, including one both ends open, with inner cavity sensor shell, be provided with the waterproof cable for real-time transmission potential information in the inner cavity of the sensor shell, the bottom of the sensor shell is provided with one end into the inner cavity and the waterproof cable electric connection in the inner cavity, the other end extends silver chloride electrode, the top of the sensor shell is equipped with the flange plate for sealing inner cavity, the flange plate is opened and has the connecting hole that allows waterproof cable to extend, the flange plate is equipped with the first connecting component for sealing and fixed waterproof cable, the bottom end of the sensor shell is equipped with the second connecting component for sealing and fixed silver chloride electrode, the surface of the sensor shell is provided with the fixed connection device for quickly installing the sensor shell and the rib plate on the inner wall of ballast tank.

[0010] In a preferred technical scheme of the utility model, the fixed connection device includes two fixed plates which are arranged to extend radially and horizontally outward from the sensor shell, a connecting area for plugging with the rib plate on the inner wall of the ballast tank is formed between the two fixed plates, and at least one of the fixed plates is provided with a pressing mechanism for locking and fixing the fixed plate and the rib plate.

[0011] In a preferred technical scheme of the utility model, the pressing mechanism includes a threaded hole formed in one of the fixed plates, a pressing bolt is arranged in the threaded hole in threaded connection with the fixed plate, and one end of the pressing bolt extends into the connecting area.

[0012] In a preferred technical scheme of the utility model, an end of the pressing bolt is provided with a rubber protective layer for elastically pressing and fixing the rib plate.

[0013] In a preferred technical scheme of the utility model, a conductive rod is arranged in the inner cavity for connecting the silver chloride electrode and the waterproof cable, the silver chloride electrode is connected with the conductive rod in threaded connection, the waterproof cable is connected with the conductive rod through a wire core conductor, and the inner cavity is filled with a potting adhesive layer for sealing the silver chloride electrode, the waterproof cable and the conductive rod.

[0014] In the preferred technical scheme of the utility model, the first connecting part includes the cable outgoing line seat fixedly connected with the flange plate, the cable outgoing line seat is equipped with rubber sealing sleeve, the waterproof cable is fixedly connected with the cable outgoing line seat through the rubber sealing sleeve, the top of the cable outgoing line seat is provided with the cable locking piece which is screwed with the cable outgoing line seat.

[0015] In the preferred technical scheme of the utility model, the second connecting part includes the cover body for sealing the bottom end of the sensor shell with an opening, the cover body is provided with the insulating sleeve for fixing the silver chloride electrode which is screwed with the opening, and the insulating sleeve and the cover body and the silver chloride electrode and the insulating sleeve are all sealedly connected through the sealing ring.

[0016] In the preferred technical scheme of the utility model, the lower surface of the cover body is provided with the protection seat body for protecting the silver chloride electrode which is arranged downwards along the axial direction of the sensor shell, and the protection seat body and the insulating sleeve are filled with the potting adhesive layer.

[0017] In the preferred technical scheme of the utility model, the top outer wall of the sensor shell is fixedly connected with the annular connecting disc, the flange plate is detachably connected with the annular connecting disc through the fixing bolt, and the annular connecting disc and the flange plate are provided with the sealing gasket.

[0018] The utility model discloses a kind of beneficial effects of the utility model, the anti-corrosion sensor for in-service FPS0 ballast tank corrosion monitoring is obtained by the above design, when using, the two fixed plates that are arranged along the radial direction of sensor shell and extend horizontally outward, and the connecting area that is formed between the two fixed plates is used to be inserted with the rib plate on the inner wall of ballast tank, can be quickly installed on the rib plate of ballast tank, and the locking and fixing of fast are realized by the compression bolt that is screwed with fixed plate, greatly improve the installation speed of corrosion sensor in the ballast tank of offshore FPSO, and installation process is simple and easy to operate, greatly improve installation efficiency;The end of compression bolt is provided with the rubber protective layer that is elastically compressed and fixed with rib plate, avoid rib plate coating damage function during installation process is realized.And when sensor is damaged, sensor can be quickly replaced, change the status that traditional cannot be quickly replaced and influence underwater data monitoring.The installation during offshore FPSO operation is realized, ship body is not damaged, and the installation process does not need to be heat treated, can be specially applicable to the ballast tank of offshore FPSO. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings used in the embodiments will be briefly introduced as follows. Obviously, the drawings below only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained without creative labor on the basis of the drawings.

[0020] Figure 1 is a schematic diagram of the whole cross-section structure provided by the embodiments of the present application;

[0021] Figure 2 is provided by the embodiments of the present application Figure 1 is a schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 3 is provided by the embodiments of the present application Figure 1 is a schematic diagram of the enlarged structure at B in the middle.

[0023] In the figure: 1, inner cavity; 2, sensor shell; 3, waterproof cable; 4, flange plate; 5, connecting hole; 6, annular connecting disc; 7, fixing bolt; 8, sealing gasket; 9, silver chloride electrode; 10, conductive rod; 11, wire core wire; 12, fixing screw; 13, potting adhesive layer; 14, first connecting component; 15, cable outlet seat; 16, rubber sealing sleeve; 17, cable locking piece; 18, second connecting component; 19, cover; 20, insulating sleeve; 21, sealing ring; 22, protection seat body; 23, fixed connection device; 24, fixed plate; 25, connecting area; 26, threaded hole; 27, compression bolt; 28, rubber protective layer. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] Please refer to Figures 1 to 3The utility model provides a technical scheme: a kind of anticorrosion sensor for in-service FPS0 ballast tank corrosion monitoring, including one both ends opening, with inner cavity 1 sensor shell 2, waterproof cable 3 for real-time transmission potential information is arranged in the sensor shell 2 in inner cavity 1, the bottom of the sensor shell 2 is provided with one end and enters inner cavity 1 and inner cavity 1 in waterproof cable 3 electrical connection, the other end extends silver chloride electrode 9 downwards, the top of the sensor shell 2 is equipped with the flange plate 4 for sealing inner cavity 1, the flange plate 4 is opened and has the connecting hole 5 that allows waterproof cable 3 to extend, the flange plate 4 is equipped with the first connecting component 14 for sealing and fixed waterproof cable 3, the bottom end of the sensor shell 2 is equipped with the second connecting component 18 for sealing and fixed silver chloride electrode 9, the surface of the sensor shell 2 is provided with the fixed connection device 23 for the rib plate of quick installation of sensor shell 2 and ballast tank inner wall.

[0026] Further, the fixed connection device 23 includes two fixed plates 24 extending radially outward along the sensor shell 2, and a connecting area 25 is formed between the two fixed plates 24 for plugging with the rib plate on the inner wall of the ballast tank. At least one of the fixed plates 24 is provided with a pressing mechanism for locking and fixing the fixed plate 24 with the rib plate.

[0027] The fixed connection device 23 includes two fixed plates 24 extending radially outward along the sensor shell 2, and a connecting area 25 is formed between the two fixed plates 24 for plugging with the rib plate on the inner wall of the ballast tank. At least one of the fixed plates 24 is provided with a pressing mechanism for locking and fixing the fixed plate 24 with the rib plate, thereby ensuring the stable installation of the sensor. The fixed connection device 23 does not need to punch holes in the bulkhead, avoiding the problem of damaging the anticorrosive coating of the bulkhead. At the same time, it has a simple structure and is easy to operate, can quickly realize the installation and disassembly of the sensor, and reduces the installation difficulty and cost.

[0028] Further, the pressing mechanism includes a threaded hole 26 opened in one of the fixed plates 24, and a pressing bolt 27 threadedly connected with the fixed plate 24 is arranged in the threaded hole 26, and one end of the pressing bolt 27 extends into the connecting area 25.

[0029] The threaded hole 26 is opened in the fixed plate 24, and the pressing bolt 27 is threadedly connected with the threaded hole 26. One end of the pressing bolt 27 extends into the connecting area 25 and contacts with the rib plate to generate a pressing force, thereby realizing the locking and fixing of the fixed plate 24 with the rib plate. The pressing mechanism has a simple and reliable structure, which can ensure the stable installation of the sensor on the inner wall of the ballast tank. At the same time, the pressing force of the pressing bolt 27 can be adjusted as needed to adapt to rib plates of different thicknesses and different installation environments.

[0030] Furthermore, the end of the clamping bolt 27 is provided with a rubber protective layer 28 which is elastically compressed and fixed to the rib plate.

[0031] A rubber protective layer 28 is installed at the end of the clamping bolt 27. This rubber protective layer 28 has a certain degree of elasticity and wear resistance. When the clamping bolt 27 contacts the rib, the rubber protective layer 28 elastically deforms, thereby enhancing the reliability and stability of the clamping mechanism. Furthermore, the rubber protective layer 28 reduces wear and damage to the rib caused by the clamping bolt 27. The use of the rubber protective layer 28 improves the reliability and stability of the clamping mechanism, extending the service life of the sensor. It also reduces damage to the rib caused by the clamping bolt 27, protects the bulkhead coating, and reduces maintenance costs.

[0032] Furthermore, a conductive rod 10 for connecting the silver chloride electrode 9 and the waterproof cable 3 is provided in the inner cavity 1. The silver chloride electrode 9 is connected to the conductive rod 10 by threads, and the waterproof cable 3 is connected to the conductive rod 10 by fixing screws 12 through a core wire 11. The inner cavity 1 is filled with a potting glue layer 13 for sealing the silver chloride electrode 9, the waterproof cable 3 and the conductive rod 10.

[0033] A conductive rod 10 is provided in the inner cavity 1 to connect the silver chloride electrode 9 and the waterproof cable 3. The silver chloride electrode 9 and the conductive rod 10 are connected by threads, and the waterproof cable 3 is connected to the conductive rod 10 via a core conductor 11. A potting compound layer 13 is filled in the inner cavity 1 to seal the connection between the silver chloride electrode 9, the waterproof cable 3, and the conductive rod 10, preventing seawater from infiltrating. This structure ensures a reliable connection and seal between the silver chloride electrode 9 and the waterproof cable 3. Furthermore, the use of the potting compound layer 13 improves the sensor's waterproof performance and corrosion resistance, extending its service life. Furthermore, this structure facilitates the repair and replacement of components such as the silver chloride electrode 9 and the waterproof cable 3.

[0034] Furthermore, the first connecting component 14 includes a cable outlet seat 15 fixedly connected to the flange 4, a rubber sealing sleeve 16 is provided in the cable outlet seat 15, the waterproof cable 3 is fixedly connected to the cable outlet seat 15 through the rubber sealing sleeve 16, and a cable locking piece 17 threadedly connected to the cable outlet seat 15 is provided on the top of the cable outlet seat 15.

[0035] The cable outlet seat 15 is fixedly connected with the flange plate 4, forming a channel for fixing the waterproof cable 3. The rubber sealing sleeve 16 is arranged in the cable outlet seat 15, used to seal the gap between the waterproof cable 3 and the cable outlet seat 15. The cable locking piece 17 is threadedly connected with the cable outlet seat 15, used to further fix the waterproof cable 3 and prevent it from loosening or falling off. This structure ensures the reliable sealing and fixing of the waterproof cable 3, preventing seawater from penetrating into the sensor inner cavity 1. At the same time, the use of the cable locking piece 17 improves the stability of the waterproof cable 3, reducing the risk of loosening or falling off due to vibration or impact.

[0036] Further, the second connecting component 18 includes a cover 19 with an opening for sealing the bottom end of the sensor shell 2, and the cover 19 is provided with an insulating sleeve 20 threadedly connected with the opening for fixing the silver chloride electrode 9. The insulating sleeve 20 and the cover 19, as well as the silver chloride electrode 9 and the insulating sleeve 20, are all sealed and connected by a sealing ring 21.

[0037] The cover 19 has an opening for sealing the bottom end of the sensor shell 2. The insulating sleeve 20 is threadedly connected with the opening for fixing the silver chloride electrode 9 and preventing it from directly contacting the sensor shell 2. The sealing ring 21 is arranged between the insulating sleeve 20 and the cover 19, as well as between the silver chloride electrode 9 and the insulating sleeve 20, for increasing the sealing performance and preventing seawater from penetrating in. This structure ensures the reliable sealing and fixing of the silver chloride electrode 9, preventing seawater from directly contacting the silver chloride electrode 9 and affecting its measurement accuracy. At the same time, the use of the insulating sleeve 20 also avoids electrical contact between the silver chloride electrode 9 and the sensor shell 2, improving the safety of the sensor.

[0038] Further, the lower surface of the cover 19 extends downward along the axial direction of the sensor shell 2 and is provided with a protective seat 22 for protecting the silver chloride electrode 9, and the protective seat 22 and the insulating sleeve 20 are filled with a layer of potting glue 13.

[0039] The lower surface of the cover 19 extends downward along the axial direction of the sensor shell 2 and is provided with a protective seat 22, which has a certain thickness and strength and can protect the silver chloride electrode 9 from external impact and wear. At the same time, the protective seat 22 and the insulating sleeve 20 are filled with a layer of potting glue 13, further increasing the sealing performance and preventing seawater from penetrating in. The use of the protective seat 22 and the potting glue layer 13 improves the protection performance of the silver chloride electrode 9, prolonging its service life. At the same time, they also increase the overall strength and stability of the sensor, improving its impact resistance and wear resistance.

[0040] Further, the top outer wall of the sensor shell 2 is fixedly connected with an annular connecting disc 6, the flange plate 4 is detachably connected with the annular connecting disc 6 through a fixing bolt 7, and a sealing gasket 8 is arranged between the annular connecting disc 6 and the flange plate 4.

[0041] The top outer wall of the sensor shell 2 is fixedly connected with an annular connecting disc 6, and the flange disc 4 is detachably connected with the annular connecting disc 6 through fixing bolts 7. A sealing gasket 8 is arranged between the annular connecting disc 6 and the flange disc 4, for increasing the sealing performance of the connecting position and preventing seawater from penetrating. The structure ensures the reliable connection and sealing between the sensor shell 2 and the flange disc 4. At the same time, the use of the sealing gasket 8 improves the waterproof performance of the connecting position and reduces the risk of sensor damage caused by seawater penetration. In addition, the structure also facilitates the maintenance and replacement work of the sensor.

[0042] Working principle: The corrosion condition in the ballast tank of the FPSO is monitored in real time by forming a potential difference between the silver chloride electrode 9 and seawater. The conductive rod 10 is arranged inside the sensor shell 2 to connect the silver chloride electrode 9 and the waterproof cable 3, and is sealed by the potting glue layer 13. The sensor is quickly installed on the rib plate of the inner wall of the ballast tank through the fixing connection device 23, and the flange disc 4, the first connecting part 14 and the second connecting part 18 ensure the sealing and fixing of the inside of the sensor. The annular connecting disc 6 and the sealing gasket 8 are used to increase the sealing performance between the sensor shell 2 and the flange disc 4, preventing seawater from penetrating. The whole sensor structure is compact and reasonable, and can adapt to the harsh marine environment, realizing long-term and stable monitoring of the corrosion condition of the ballast tank.

[0043] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An anti-corrosion sensor for monitoring corrosion in an in-service FPSO ballast tank, comprising a sensor housing with two open ends and an inner cavity, the sensor housing being provided with a waterproof cable extending into the inner cavity for real-time transmission of potential information, characterized in that: The bottom of the sensor shell is provided with a silver chloride electrode with one end extending into the inner cavity and electrically connected with the waterproof cable in the inner cavity and the other end extending downward, the top of the sensor shell is provided with a flange plate for sealing the inner cavity, the flange plate is provided with a connecting hole for allowing the waterproof cable to extend out, the flange plate is provided with a first connecting component for sealing and fixing the waterproof cable, the bottom of the sensor shell is provided with a second connecting component for sealing and fixing the silver chloride electrode, and the surface of the sensor shell is provided with a fixed connecting device for mounting the sensor shell and the rib plate on the inner wall of the ballast tank.

2. The corrosion sensor for corrosion monitoring of an in-service FPSO ballast tank of claim 1, wherein: The fixed connecting device comprises two fixed plates extending radially and horizontally outwardly along the sensor shell, and a connecting area for inserting the rib plate on the inner wall of the ballast tank is formed between the two fixed plates.

3. The corrosion sensor for corrosion monitoring of an in-service FPSO ballast tank of claim 2, wherein: The compression mechanism comprises a threaded hole formed in one of the fixed plates, a compression bolt threadedly connected with the fixed plate is arranged in the threaded hole, and one end of the compression bolt extends into the connecting area.

4. The corrosion sensor for corrosion monitoring of an in-service FPSO ballast tank of claim 3, wherein: The end of the compression bolt is provided with a rubber protective layer for elastically and tightly fixing the rib plate.

5. The corrosion sensor for corrosion monitoring of an in-service FPSO ballast tank of claim 1, wherein: The inner cavity is provided with a conductive rod for connecting the silver chloride electrode and the waterproof cable, the silver chloride electrode is threadedly connected with the conductive rod, the waterproof cable is connected with the conductive rod through a wire core, and the inner cavity is filled with a potting glue layer for sealing the silver chloride electrode, the waterproof cable and the conductive rod.

6. The corrosion sensor for corrosion monitoring of an in-service FPSO ballast tank of claim 1, wherein: The first connecting component comprises a cable outlet seat fixedly connected with the flange plate, a rubber sealing sleeve is arranged in the cable outlet seat, the waterproof cable is fixedly connected with the cable outlet seat through the rubber sealing sleeve, and the top of the cable outlet seat is provided with a cable locking piece threadedly connected with the cable outlet seat.

7. The corrosion sensor for corrosion monitoring of an in-service FPSO ballast tank of claim 1, wherein: The second connecting component comprises a cover body with an opening for sealing the bottom of the sensor shell, an insulating sleeve for fixing the silver chloride electrode is threadedly connected with the opening and arranged on the cover body, and the insulating sleeve and the cover body and the silver chloride electrode and the insulating sleeve are all sealed and connected through sealing rings.

8. The corrosion sensor for corrosion monitoring of an in-service FPSO ballast tank of claim 7, wherein: The lower surface of the cover body extends downward along the axis direction of the sensor shell and is provided with a protective seat body for protecting the silver chloride electrode, and the protective seat body and the insulating sleeve are filled with a potting glue layer.

9. The corrosion sensor for corrosion monitoring of an in-service FPSO ballast tank of claim 1, wherein: The top outer wall of the sensor shell is fixedly connected with an annular connecting disc, the flange plate is detachably connected with the annular connecting disc through a fixing bolt, and a sealing gasket is arranged between the annular connecting disc and the flange plate.

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