Ship sea water pump anti-corrosion device and sea water pump

Abstract

The invention relates to the technical field of ship turbine engineering, and discloses a ship sea water pump anti-corrosion device and a sea water pump, and the ship sea water pump anti-corrosion device comprises an anti-corrosion assembly and a fixing piece; the anti-corrosion assembly comprises an anti-corrosion single body, the anti-corrosion single body comprises a connecting piece and an anti-corrosion block, the anti-corrosion block is connected to the connecting piece, the anti-corrosion block is a metal piece, and the metal property of the anti-corrosion block is higher than that of the sea water pump; the fixing piece is arranged perpendicular to the seawater flowing direction and used for being connected to an inlet of the seawater pump, and the anti-corrosion single body is connected to the fixing piece. The sacrificial anode type anti-corrosion device is installed at the inlet of the sea water pump, the anti-corrosion block is corroded preferentially to protect the pump body according to the electrochemical corrosion principle, the corrosion resistance of the pump body is remarkably improved, and the service life of the pump body is remarkably prolonged. The anti-corrosion single body is independent in structure, convenient to disassemble, assemble and maintain and suitable for narrow space of ships. The device is high in universality and can adapt to different pump types, the maintenance cost is reduced, and the ship operation reliability and economical efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of marine engineering technology, and in particular to a corrosion prevention device for a marine seawater pump and a seawater pump. Background Technology

[0002] Seawater pumps, as key equipment on ships, play a vital role. Firstly, as an essential component of the seawater cooling system, they are responsible for providing seawater cooling to diesel engines, generators, and other equipment. Secondly, seawater pumps are used for fire-fighting water supply, delivering seawater to the fire-fighting network in emergencies. Seawater pumps can also be used for ballast balancing and adjusting the ship's draft. Clearly, seawater pumps have a very wide range of applications in the marine industry. However, because seawater is a highly corrosive electrolyte solution with high salt content, strong conductivity, and biological activity, metals are easily corroded in seawater. Long-term immersion of key components such as the pump casing and impeller in seawater severely affects the pump's service life, and this corrosion directly impacts the normal operation of the ship.

[0003] To improve the service life of marine seawater pumps, reduce seawater corrosion, solve the problem of seawater pump corrosion prevention, and ensure the normal operation of ships, there is an urgent need for a seawater pump anti-corrosion device to solve the existing problems and supplement the deficiencies of existing equipment. Summary of the Invention

[0004] The technical problem to be solved by this invention is to solve the problem of corrosion prevention in the use of existing seawater pumps, especially the technical problem of the pump inlet being corroded by seawater for a long time, resulting in shortened service life and inconvenient maintenance.

[0005] To solve the above-mentioned technical problems, the present invention provides a corrosion protection device for a marine seawater pump, including corrosion protection components and fasteners; The anti-corrosion component includes an anti-corrosion unit, which includes a connector and an anti-corrosion block. The anti-corrosion block is connected to the connector and is made of metal. The metal of the anti-corrosion block is stronger than that of the seawater pump. The fastener is positioned perpendicular to the direction of seawater flow and is used to connect to the inlet of the seawater pump. The anti-corrosion unit is connected to the fastener.

[0006] Preferably, there are multiple anti-corrosion monomers, which are circumferentially spaced on the fixing component.

[0007] Preferably, the angle between two adjacent anti-corrosion monomers is 30° to 60°.

[0008] Preferably, the fastener includes a first flange and a second flange, wherein the first flange is provided with a plurality of first fixing holes spaced apart circumferentially, and the second flange is provided with a plurality of second fixing holes spaced apart circumferentially; Each bolt is used to fix the first flange and the second flange by passing through the corresponding first fixing hole and the corresponding second fixing hole in sequence. The first flange and the second flange form multiple radially arranged installation spaces. The anti-corrosion block is housed in the installation space and the anti-corrosion unit is installed between the first flange and the second flange.

[0009] Preferably, the anti-corrosion monomer further includes a gasket, which is pressed between the connector and the anti-corrosion block.

[0010] Preferably, the corrosion-resistant block is made of zinc.

[0011] Preferably, the connector is a blind flange, the anti-corrosion block has mounting holes, and bolts pass through the mounting holes to fix the anti-corrosion block and the connector.

[0012] A seawater pump includes a marine seawater pump anti-corrosion device as described above, a pump motor, and a pump body. The pump motor is fixedly connected to the pump body. The pump body is hollow and has a flow space inside. The flow space can pass through seawater. The two ends of the flow space are the pump inlet and the pump outlet, respectively. A fixing member is fixedly connected to the pump body and located at the pump inlet.

[0013] Compared with the prior art, the anti-corrosion device for marine seawater pumps according to an embodiment of the present invention has the following advantages: (1) In this embodiment, the anti-corrosion block is a metal part, and a more reactive metal material than the seawater pump body material is selected. In the electrolyte environment of seawater, an electrochemical corrosion pair is formed. Because the anti-corrosion block is more metallic, that is, it is more likely to lose electrons, it will be oxidized and corroded first in seawater, thus playing the role of "sacrificial anode" and protecting the relatively inert seawater pump body from corrosion. This principle is based on the electrochemical corrosion reaction mechanism and is an effective protection method commonly used in modern anti-corrosion engineering. It is adapted to the high-salt marine environment and can significantly reduce the risk of metal fatigue, perforation, leakage and other failures caused by corrosion of seawater pumps, and improve the structural stability and service life of the pump body.

[0014] (2) In this embodiment, the anti-corrosion component forms a single structure with the anti-corrosion block through connectors, and is further fixed to the seawater pump inlet by fasteners. Each anti-corrosion unit of this anti-corrosion component is independent and can be disassembled and replaced individually without dismantling or large-scale removal of the entire seawater pump, effectively reducing maintenance difficulty and operating costs. Especially in the small and limited working space of a ship, traditional anti-corrosion measures such as integral inner wall spraying or electrode welding are difficult to maintain and inefficient. However, this invention achieves rapid assembly / disassembly through connectors and fasteners, which greatly improves the efficiency of anti-corrosion material replacement and is suitable for the periodic maintenance requirements of equipment that operates for a long time.

[0015] (3) The fixing component is set perpendicular to the seawater flow direction, which allows for the reasonable arrangement of multiple anti-corrosion units without obstructing the main water flow channel. This ensures that the anti-corrosion blocks are directly exposed to the seawater flow environment, fully contacting the electrolyte to form an effective cathodic protection electric field. Consequently, the entire pump body has a larger protected surface area and more comprehensive corrosion inhibition. In addition, the anti-corrosion device is installed at the seawater pump inlet, which is one of the parts of the pump body most susceptible to seawater erosion and corrosion. Selecting this location to install the sacrificial anode device makes the protection effect more targeted and timely.

[0016] (4) The anti-corrosion device mainly relies on the combination and installation of fasteners, connectors and anti-corrosion units. It does not depend on the structure of a specific model or brand of seawater pump and has good versatility and scalability. By adjusting the structural dimensions of the fasteners, it can be adapted to seawater pumps of different diameters or installation structures, which facilitates standardized manufacturing and mass deployment and helps to promote its widespread application in the shipbuilding industry.

[0017] (5) As an important component of the ship's cooling system, ballast system and fire protection system, the corrosion resistance of the seawater pump is directly related to the ship's safety and operational efficiency. This embodiment effectively extends the pump body's lifespan and reduces the probability of failures caused by corrosion, thereby reducing the operational risks of sudden maintenance and downtime for repairs due to pump damage during navigation, and indirectly improving the ship's uptime and economy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the anti-corrosion component according to an embodiment of the present invention; Figure 2 This is a side view of an embodiment of the present invention; Figure 3 This is a cross-sectional view of an embodiment of the present invention; Figure 4 This is a schematic diagram of a seawater pump according to an embodiment of the present invention.

[0019] In the diagram, 1 is the anti-corrosion component; 11 is the connector; 12 is the anti-corrosion block; and 13 is the gasket. 2. Fasteners; 21. First flange; 211. First fixing hole; 22. Second flange; 221. Second fixing hole; 100. Anti-corrosion device for marine seawater pumps; 200. Seawater pump; 201. Pump motor; 202. Pump body; 203. Pump inlet; 204. Pump outlet. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0021] In the description of this invention, it should be understood that the terms "longitudinal," "lateral," "vertical," "horizontal," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., used to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0022] In the description of the invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] like Figures 1-4 As shown, a preferred embodiment of the present invention provides a corrosion protection device 100 for a marine seawater pump, which includes a corrosion protection component 1 and a fastener 2. The anti-corrosion component 1 includes an anti-corrosion unit, which includes a connector 11 and an anti-corrosion block 12. The anti-corrosion block 12 is connected to the connector 11 and is a metal part. The metal of the anti-corrosion block 12 is stronger than that of the seawater pump 200. The fastener 2 is set perpendicular to the direction of seawater flow and is used to connect to the inlet of the seawater pump 200. The anti-corrosion unit is connected to the fastener 2.

[0024] Based on the above scheme, the anti-corrosion block 12 in this embodiment is a metal component, selected from a metal material that is more reactive than the body material of the seawater pump 200. In the electrolyte environment of seawater, it forms an electrochemical corrosion pair. Because the anti-corrosion block 12 is more metallic, meaning it is more prone to losing electrons, it will be oxidized and corroded first in seawater, thus acting as a "sacrificial anode" to protect the relatively inert body of the seawater pump 200 from corrosion. This principle, based on the electrochemical corrosion reaction mechanism, is a commonly used and effective protective measure in modern anti-corrosion engineering. It adapts to the high-salt marine environment and can significantly reduce the risk of metal fatigue, perforation, and leakage caused by corrosion in the seawater pump 200, improving the structural stability and service life of the pump body. In this embodiment, the anti-corrosion component 1 forms a single structure with the anti-corrosion block 12 through the connector 11, and is further fixed to the inlet of the seawater pump 200 by the fastener 2. Each anti-corrosion unit of the anti-corrosion component 1 is independent and can be disassembled and replaced individually, without the need for disassembly or large-scale removal of the entire seawater pump 200, effectively reducing maintenance difficulty and operating costs. Especially in the confined working space of ships, traditional anti-corrosion measures such as integral inner wall spraying or electrode welding are difficult to maintain and inefficient. This invention, however, achieves rapid assembly / disassembly through connector 11 and fastener 2, significantly improving the efficiency of anti-corrosion material replacement and making it suitable for the periodic maintenance requirements of equipment operating for extended periods. Fastener 2 is positioned perpendicular to the seawater flow direction, allowing for the rational arrangement of multiple anti-corrosion units without obstructing the main water flow channel. This exposes the anti-corrosion block 12 directly to the seawater flow environment, ensuring full contact with the electrolyte and forming an effective cathodic protection electric field. This results in a larger protected surface area for the entire pump body and more comprehensive corrosion inhibition. Furthermore, the anti-corrosion device is located at the inlet of the seawater pump 200, one of the parts of the pump body most susceptible to seawater erosion and corrosion. Installing the sacrificial anode device at this location makes the protection effect more targeted and timely. The anti-corrosion device mainly relies on the combination of fastener 2, connector 11, and anti-corrosion units, and is not dependent on a specific model or brand of seawater pump 200 structure, possessing good versatility and scalability. By adjusting the structural dimensions of the fixing component 2, seawater pumps 200 of different diameters or installation structures can be adapted, facilitating standardized manufacturing and mass deployment, and contributing to their widespread application in the shipbuilding industry. As a crucial component of the ship's cooling, ballast, and fire-fighting systems, the corrosion resistance of the seawater pump 200 directly affects ship safety and operational efficiency. This embodiment effectively extends pump life, reduces the probability of failures caused by corrosion, thereby lowering operational risks such as sudden maintenance and downtime for repairs due to pump damage during navigation, and indirectly improving ship uptime and economic efficiency.

[0025] Furthermore, there are multiple anti-corrosion monomers, which are circumferentially spaced on the fastener 2.

[0026] Multiple corrosion-resistant units are evenly spaced around the circumference of the fixing component, forming a comprehensive surrounding protection. This arrangement ensures full contact between the sacrificial anode and the seawater pump 200 casing in multiple directions, effectively expanding the protective electric field range and placing the entire pump inlet section under anodic protection. This significantly improves the comprehensiveness and balance of the corrosion protection device, avoiding localized corrosion dead zones. The use of multiple independent corrosion-resistant units allows for a distributed redundancy design. Even if some anodes are prematurely corroded and consumed by seawater during operation, the remaining anodes can continue to provide protection, maintaining the system under continuous control. This design enhances the overall corrosion protection system's resistance to failure and significantly improves the long-term reliability of the device. The spaced arrangement of the multiple corrosion-resistant units facilitates individual inspection and assessment of the corrosion status of each anode by the crew. When the anode blocks are nearly exhausted, only specific anodes can be replaced without replacing the entire device, saving maintenance time and costs. The number and circumferential spacing of the corrosion-resistant units can be flexibly configured according to different diameters, flow rates, and materials of the seawater pump 200, exhibiting high modularity and scalability. For example, for pumps with larger flow rates, the number of anti-corrosion units can be increased to improve protection redundancy; for small pumps with limited space, the arrangement angle can be adjusted to adapt to the installation environment.

[0027] Furthermore, the angle between two adjacent anti-corrosion units is 30°~60°.

[0028] When the angle between two adjacent anti-corrosion units is controlled between 30° and 60°, it ensures uniform anode distribution and sufficient overlap of the current field to cover the entire circumferential surface of the seawater pump 200 inlet. This avoids insufficient potential protection in local areas due to excessive spacing, preventing the appearance of anti-corrosion "blind spots" and achieving a more balanced and comprehensive cathodic protection effect. In this embodiment, the angle between two adjacent anti-corrosion units is 45°.

[0029] Furthermore, the fastener 2 includes a first flange 21 and a second flange 22. The first flange 21 is provided with a plurality of first fixing holes 211 spaced apart in the circumferential direction, and the second flange 22 is provided with a plurality of second fixing holes 221 spaced apart in the circumferential direction. Each bolt is fixedly connected to the first flange 21 and the second flange 22 by passing through the corresponding first fixing hole 211 and the corresponding second fixing hole 221 in sequence. The first flange 21 and the second flange 22 enclose and form multiple radially arranged installation spaces. The anti-corrosion block 12 is housed in the installation space and the anti-corrosion unit is installed between the first flange 21 and the second flange 22.

[0030] By designing the fastener 2 as a pair of upper and lower flanges 21 and 22, and clamping the anti-corrosion unit with bolts, this structure forms a standardized, detachable modular structure. During initial assembly, simply placing the anti-corrosion unit into the pre-set installation space and tightening the bolts completes positioning and fixation, significantly improving assembly efficiency. When the anti-corrosion block 12 fails due to corrosion, only loosening some bolts allows for quick replacement of the corresponding anti-corrosion unit, eliminating the need to disassemble the entire pipeline or anti-corrosion device, greatly enhancing maintenance convenience and system maintainability. Compared to traditional welded or nested structures, this flange clamping structure offers stronger adaptability and reusability. The double-flange structure achieves circumferentially evenly distributed bolt connections through multiple sets of corresponding fixing holes. This equidistant fastening method gives the overall device the following performance advantages: it improves the structural strength and impact resistance of the device, and can resist fatigue damage caused by vibration, waves, or start-stop impacts during ship operation; the uniform force between the flanges also enhances the sealing performance, avoids local electrochemical corrosion or seawater leakage due to gaps, and improves the long-term stability of the system; the anti-corrosion unit is fixed stably under the clamping of the flanges, ensuring that it does not rotate, shift, or fall off during use, and ensuring the stability and continuity of cathodic protection. The multiple radial installation spaces enclosed between the first flange 21 and the second flange 22 have the following advantages: each anti-corrosion unit is clearly defined in an independent and symmetrical installation area, which not only maintains the symmetry and balance of the overall anti-corrosion device, but also ensures the uniform distribution of the current field; the anti-corrosion blocks 12 will not interfere with each other or become misaligned, preventing insufficient cathodic protection or partial anode redundancy in some areas due to installation errors; structurally, it helps to control the working current density and corrosion rate of the sacrificial anode, making each anti-corrosion block 12 subject to uniform stress and balanced wear, thereby extending the synchronous service life of the entire anti-corrosion device. The combined structure of flanges, anti-corrosion units, and bolt connections has strong advantages in standardization and industrial manufacturing: flanges, anti-corrosion blocks 12, and bolts can all be produced using existing general-purpose component manufacturing processes, realizing modular production and rapid on-site assembly; when replacing the anti-corrosion block 12, only the anti-corrosion unit needs to be replaced, without replacing the entire anti-corrosion device, reducing spare parts inventory pressure and maintenance costs; the modular structure also allows the entire device to be flexibly adapted to seawater pump 200 inlets of different sizes and models, improving versatility and market adaptability.

[0031] Furthermore, the anti-corrosion monomer also includes a gasket 13, which is pressed between the connector 11 and the anti-corrosion block 12.

[0032] The gasket 13, acting as a buffer layer between the connector 11 and the anti-corrosion block 12, possesses a certain degree of flexibility and deformation adaptability. During the assembly of the anti-corrosion block 12, it absorbs minor assembly errors caused by uneven tightening, provides a uniform force-bearing surface, and ensures a more secure and stable connection, preventing loosening or displacement. This reduces the risk of loosening or displacement caused by hull vibration and temperature changes during long-term use. If the anti-corrosion block 12 is in direct rigid contact with the connector 11, it is susceptible to loosening due to bolt preload or seawater flow impact. Adding the gasket 13 creates an elastic transition, effectively extending the connection life. The anti-corrosion block 12 needs to maintain good electrical contact with the metal structure to form an effective current path, achieving the cathodic protection function of the sacrificial anode. The gasket 13 helps to improve the tightness of the contact surface, reduce increased contact resistance caused by small gaps and scale buildup, and ensure a stable current loop between the sacrificial anode metal and the connector 11, thereby improving the efficiency of electrochemical protection and the sustainability of anti-corrosion performance.

[0033] Furthermore, the corrosion-resistant block 12 is made of zinc.

[0034] Zinc has a low metal potential, -1.05V relative to the standard hydrogen electrode, making it a highly reactive metal in the electrochemical corrosion sequence. By using zinc as a sacrificial anode material, when zinc forms a micro-battery with the steel and stainless steel of the seawater pump 200, zinc, due to its more negative potential, will preferentially undergo oxidative sacrificial corrosion, thus protecting the steel from corrosion. The entire system forms a cathodic protection mechanism, significantly slowing down the rate of electrochemical corrosion of the seawater pump 200 and its components in the marine environment, effectively controlling the formation of corrosion products, and reducing perforation, blockage, or structural failure of the equipment due to corrosion. Zinc is widely available, inexpensive, has good processing performance, and is readily industrially available. It can be quickly molded into anti-corrosion blocks 12 of different sizes and geometries through casting or pressing processes to meet the anti-corrosion requirements of various pump types. The replacement frequency is relatively controllable, and the maintenance cost is low, making it more economical than other sacrificial anode materials such as aluminum and magnesium. The main products of zinc corrosion in seawater are zinc oxide or basic zinc carbonate. These substances have good stability and do not form strong corrosive deposits on the inner wall of water pumps or fluid systems, are less likely to cause blockages in water pump channels, and have minimal impact on subsequent treatment equipment and environmental systems, exhibiting high safety and environmental friendliness. Zinc anodes demonstrate good corrosion uniformity and protective capabilities in seawater with moderate conductivity, as well as in still and flowing water environments. They are not prone to localized anodic passivation and maintain stable performance at different temperatures and flow rates, making them particularly suitable for protecting critical components of ships, offshore platforms, port equipment, and other equipment that are immersed in seawater for extended periods.

[0035] Furthermore, the connector 11 is a blind flange, and the anti-corrosion block 12 is provided with mounting holes. Bolts pass through the mounting holes to fix the anti-corrosion block 12 and the connector 11.

[0036] As a high-strength sealing component, the blind flange possesses excellent load-bearing capacity and structural rigidity, providing a stable and robust mounting base. By directly fixing the anti-corrosion block 12 to the blind flange with bolts, it effectively prevents the anti-corrosion block 12 from loosening or falling off due to water flow impact or ship vibration, ensuring a consistently good electrical contact between the sacrificial anode and the pump body, thereby ensuring the long-term stable performance of cathodic protection. The anti-corrosion block 12 has dedicated mounting holes and is connected to the blind flange with bolts, providing a clear assembly direction and positioning structure, facilitating rapid on-site installation without complex welding or snap-fit ​​processes. When the anti-corrosion block 12 is corroded to a critical value, it can be easily replaced simply by removing the bolts, significantly improving maintenance efficiency, reducing the impact on the pump body structure during disassembly and assembly, and enhancing the safety and convenience of system maintenance. The blind flange is not only used to support the anti-corrosion block 12, but also has a certain sealing and isolation function. It can form a good seal with the pipeline structure at the installation position to prevent water seepage from local gaps and the accumulation of corrosive media. The bolt connection can be paired with a gasket 13 to further enhance the leak-proof and corrosion-proof capabilities of the connection area and extend the service life of the entire connection component.

[0037] A seawater pump 200 includes a marine seawater pump anti-corrosion device 100 as described above, a pump motor 201, and a pump body 202. The pump motor 201 is fixedly connected to the pump body 202. The pump body 202 is hollow and has a flow space inside. The flow space can pass through seawater. The two ends of the flow space are the pump inlet 203 and the pump outlet 204, respectively. The fixing member 2 is fixedly connected to the pump body 202 and is located at the pump inlet 203.

[0038] Based on the above solution, a more compact structural layout is achieved by directly integrating the anti-corrosion device with the pump body 202. The anti-corrosion component 1 is positioned at the pump inlet 203, allowing cathodic protection to begin before seawater enters the pump body. This effectively inhibits the electrochemical corrosion process at the inlet and inside the pump chamber, improving the service life and operational stability of the entire seawater pump 200 system. This is particularly suitable for marine equipment operating in highly corrosive marine environments for extended periods. The anti-corrosion device is pre-assembled as part of the pump body at the factory, eliminating the need for users to separately select, match, and install the anti-corrosion component 1, significantly lowering the installation technical threshold. During later maintenance, only periodic replacement of the anti-corrosion block 12 based on its wear is required, without disassembling the entire pump structure or external pipelines. This enhances maintenance convenience and operational safety. Furthermore, it effectively avoids common cathodic protection failures such as grounding and poor contact during equipment commissioning, increasing the system's initial success rate. Because the corrosion protection device is integrated with the pump system, coordination work such as electrochemical compatibility, installation space, and flow channel design is completed during the design and manufacturing stages, ensuring the structural and functional coordination among the system components. This makes it particularly suitable for direct integration into complete systems such as shipbuilding engineering, seawater cooling circulation systems, and large port pumping equipment. It facilitates the formation of a series of standardized seawater pump 200 corrosion protection products, reducing procurement costs and project implementation cycles. The integrated corrosion protection design fundamentally reduces the risk of corrosion failure of key pump components, avoiding problems such as structural fatigue, localized perforation, and decreased hydraulic performance. This extends the pump's service life, reduces spare parts replacement, maintenance downtime, and labor costs caused by corrosion, and improves the overall economic efficiency of the operating system.

[0039] In summary, this embodiment of the invention provides a corrosion protection device 100 for a marine seawater pump. The corrosion protection block 12 in this embodiment is a metal component, made of a more reactive metal material than the body material of the seawater pump 200. In the electrolyte environment of seawater, it forms an electrochemical corrosion pair. Because the corrosion protection block 12 is more metallic, meaning it is more prone to losing electrons, it will be oxidized and corroded first in seawater, thus acting as a "sacrificial anode" to protect the relatively inert body of the seawater pump 200 from corrosion. This principle is based on the electrochemical corrosion reaction mechanism and is a commonly used and effective protective measure in modern corrosion protection engineering. It is adapted to the high-salt marine environment and can significantly reduce the risk of metal fatigue, perforation, leakage, and other failures caused by corrosion in the seawater pump 200, improving the structural stability and service life of the pump. In this embodiment, the corrosion protection component 1 forms a single structure with the corrosion protection block 12 through the connector 11 and is further fixed to the inlet of the seawater pump 200 by the fixing component 2. Each corrosion protection unit of the corrosion protection component 1 is independent and can be disassembled and replaced individually without dismantling or large-scale removal of the entire seawater pump 200, effectively reducing maintenance difficulty and operating costs. Especially in the confined working space of ships, traditional anti-corrosion measures such as integral inner wall spraying or electrode welding are difficult to maintain and inefficient. This invention, however, achieves rapid assembly / disassembly through connector 11 and fastener 2, significantly improving the efficiency of anti-corrosion material replacement and making it suitable for the periodic maintenance requirements of equipment operating for extended periods. Fastener 2 is positioned perpendicular to the seawater flow direction, allowing for the rational arrangement of multiple anti-corrosion units without obstructing the main water flow channel. This exposes the anti-corrosion block 12 directly to the seawater flow environment, ensuring full contact with the electrolyte and forming an effective cathodic protection electric field. This results in a larger protected surface area for the entire pump body and more comprehensive corrosion inhibition. Furthermore, the anti-corrosion device is located at the inlet of the seawater pump 200, one of the parts of the pump body most susceptible to seawater erosion and corrosion. Installing the sacrificial anode device at this location makes the protection effect more targeted and timely. The anti-corrosion device mainly relies on the combination of fastener 2, connector 11, and anti-corrosion units, and is not dependent on a specific model or brand of seawater pump 200 structure, possessing good versatility and scalability. By adjusting the structural dimensions of the fixing component 2, seawater pumps 200 of different diameters or installation structures can be adapted, facilitating standardized manufacturing and mass deployment, and contributing to their widespread application in the shipbuilding industry. As a crucial component of the ship's cooling, ballast, and fire-fighting systems, the corrosion resistance of the seawater pump 200 directly affects ship safety and operational efficiency. This embodiment effectively extends pump life, reduces the probability of failures caused by corrosion, thereby lowering operational risks such as sudden maintenance and downtime for repairs due to pump damage during navigation, and indirectly improving ship uptime and economic efficiency.

[0040] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A marine vessel sea water pump corrosion prevention device, characterized by, The anticorrosion device (100) comprises an anticorrosion component (1) and a fixing component (2). The anticorrosion component (1) comprises an anticorrosion monomer, which comprises a connecting component (11) and an anticorrosion block (12) connected to the connecting component (11). The fixing component (2) is arranged perpendicularly to the direction of seawater flow and is connected to the inlet of the seawater pump (200).

2. The marine vessel sea water pump corrosion protection apparatus of claim 1, wherein, The anticorrosion monomers are arranged circumferentially and spaced apart on the fixing component (2).

3. The marine vessel sea water pump corrosion protection apparatus of claim 2, wherein, The spacing angle between two adjacent anticorrosion monomers is 30°-60°.

4. The marine vessel sea water pump corrosion protection apparatus of claim 1, wherein, The fixing component (2) comprises a first flange sheet (21) and a second flange sheet (22). Each bolt component is arranged to pass through the corresponding first fixing hole (211) and the corresponding second fixing hole (221) in sequence to fixedly connect the first flange sheet (21) and the second flange sheet (22).

5. The marine vessel sea water pump corrosion prevention apparatus of claim 1, wherein, The first flange sheet (21) and the second flange sheet (22) enclose a plurality of radially arranged mounting spaces, and the anticorrosion block (12) is accommodated in the mounting space and the anticorrosion monomer is mounted between the first flange sheet (21) and the second flange sheet (22).

6. The marine vessel sea water pump corrosion prevention apparatus of claim 1, wherein, The anticorrosion monomer further comprises a gasket (13) compressed between the connecting component (11) and the anticorrosion block (12).

7. The marine vessel sea water pump corrosion prevention apparatus of claim 1, wherein, The anticorrosion block (12) is made of zinc.

8. A sea water pump, characterized by The connecting component (11) is a blind flange, and the anticorrosion block (12) is provided with a mounting hole through which a bolt is fixedly connected to the anticorrosion block (12) and the connecting component (11). The anticorrosion device (100) comprises a ship seawater pump anticorrosion device (100), a pump motor (201), and a pump body (202), the pump motor (201) is fixedly connected to the pump body (202), the pump body (202) is hollow and has a flow space inside, the flow space can pass through seawater, the two ends of the flow space are a pump inlet (203) and a pump outlet (204), respectively, the fixing component (2) is fixedly connected to the pump body (202) and located at the pump inlet (203).

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