A corrosion prevention method for seawater intake pumps

Abstract

The present invention provides a method for preventing corrosion of a seawater water intake pump, comprising a water intake pump required in the method and a pump blade arranged inside the water intake pump, and comprising the following steps: S1. installing an aluminum anode mechanism at the turbulent flow area at the inlet of the seawater pump and at the end surface of the pump shaft of the pump blade, so that the pump body, impeller and pump shaft are all protected; S2. installing a coupling at the end of the pump shaft of the pump blade away from the aluminum anode mechanism, and installing a carbon brush mechanism on one side of the coupling, using the pump shaft and the pump housing as continuous conductors to lead out the heterogeneous current. The invention can prevent the corrosion of the impeller, shaft and pump body by arranging the aluminum anode mechanism in the turbulent flow area; and lead out the current by installing a carbon brush mechanism at the coupling to prevent the gap between the pump shaft and the shaft sleeve from corrosion; the method can effectively prevent the corrosion problem of the pump side components of the seawater pump, improve the corrosion resistance, that is, extend the service life of the pump, avoid equipment defects and hidden dangers caused by corrosion, and ensure the safe and stable operation of the factory seawater system.

Description

Technical Field

[0001] The present invention relates to the technical field of seawater intake equipment, and particularly relates to a corrosion prevention method for a seawater intake pump. Background Art

[0002] At present, industrial enterprises in coastal cities mostly use seawater to complete the industrial production process. As a cheap water resource, seawater can be used in systems such as axial cooling water cooling, seawater desulfurization, and seawater desalination. Then, the seawater intake pump has become an essential water intake device.

[0003] Seawater intake pumps are generally vertical axial flow pumps. The characteristics of this type of pump are small head, large flow rate, and the main components are immersed in seawater for a long time. There are the following two problems:

[0004] Since the pump shaft, impeller, suction inlet, etc. are in high-corrosion media of seawater at 0 - 20°C for a long time, components made of ordinary carbon steel and cast iron are extremely easy to corrode and then fail in seawater, and the service life is extremely low.

[0005] To prevent corrosion, pump manufacturers usually choose corrosion-resistant materials such as stainless steel or 316L. However, there is a contact gap between the shaft sleeve and the pump shaft (the gap size is usually between 0.025 mm and 0.1 mm. It is easy for liquid to penetrate, but it is difficult for ion migration). Oxygen depolarization corrosion of iron occurs both inside and outside the gap in aerated seawater. Once the corrosion occurs, the oxygen inside the gap is consumed. Due to the corrosion shielding, oxygen cannot be replenished in time, while there is sufficient oxygen outside the gap. At this time, an oxygen concentration difference potential is formed between the inside and outside of the gap. Hydrolysis of chloride produces H+, and the medium inside the gap is acidified, making the corrosion inside the gap faster and faster until a deep pit is formed. In severe cases, a shaft breakage accident may occur. The gaps between other components will also cause serious corrosion phenomena, resulting in equipment defects. Summary of the Invention

[0006] In view of the above problems, the present invention provides a corrosion prevention method for a seawater intake pump, aiming to solve the technical problems that components such as the pump shaft of the seawater pump have been in seawater medium for a long time, are easy to corrode, have a short service life and pose a safety hazard, seriously threatening the safety of industrial production.

[0007] To achieve the above object, the present invention provides the following technical solution: A corrosion prevention method for a seawater intake pump, including a pump impeller, and the following method steps:

[0008] S1. Install an aluminum anode mechanism (2) at the turbulent flow area at the inlet of the seawater pump and the end face of the pump shaft of the pump impeller (1) to protect the pump body, impeller, and pump shaft from corrosion.

[0009] S2. Install a coupling (3) at one end of the pump shaft of the pump impeller (1) away from the aluminum anode mechanism (2), and install a carbon brush mechanism (4) on one side of the coupling (3). Use the pump shaft and the pump housing as continuous conductors to export the heterogeneous current.

[0010] Further, the aluminum anode mechanism includes a main fixing seat. The bottom surface of the main fixing seat is arranged on the end surface of the pump impeller rotating shaft. A plurality of closed bearings are sleeved in the middle of the main fixing seat. A bearing support cylinder is sleeved in the middle between the plurality of closed bearings. A plurality of hubs are respectively sleeved outside the plurality of closed bearings. A plurality of aluminum anode plates are arranged between the plurality of hubs. A bearing fixing ring is sleeved at the other end of the main fixing seat. A locking nut is threadedly connected to the top surface of the bearing fixing ring and the other end of the main fixing seat.

[0011] Further, the main fixing seat includes a bearing fixing seat. The bottom surface of the bearing fixing seat is arranged on the end surface of the pump impeller rotating shaft. The middle part of the top surface of the bearing fixing seat is fixedly connected to one end of a fixed middle column. The other end of the fixed middle column is provided with an installation thread.

[0012] Further, the hub includes a shaft sleeve. A plurality of spokes are arranged on the outer side of the shaft sleeve. One side of each of the plurality of spokes is arranged at one end of the aluminum anode plate.

[0013] Further, the aluminum anode plate is arranged in a spiral shape. A plurality of through holes are opened in the middle of the aluminum anode plate. Both ends of the aluminum anode plate are respectively arranged on one side of the plurality of hubs.

[0014] Further, the thickness of the aluminum anode plate is 5 - 8 mm.

[0015] Further, the carbon brush mechanism includes a carbon brush block. The bottom surface of the carbon brush block is slidably connected to one side of the coupling. The top surface of the carbon brush block is arranged on the bottom surface of a carbon brush pressing block. A pressing spring is sleeved in the middle of the carbon brush pressing block. The upper part of the carbon brush pressing block is slidably connected to the middle part of a carbon brush pressing limit seat. The upper end of the carbon brush pressing block is electrically connected to a zinc block.

[0016] Further, the carbon brush pressing block includes a carbon brush fixing seat. The bottom surface of the carbon brush fixing seat is arranged on the top surface of the carbon brush block. A pressing guide rod is arranged in the middle of the top surface of the carbon brush fixing seat. The pressing spring is sleeved on the lower part of the pressing guide rod. The upper part of the pressing guide rod is slidably connected to the middle part of the carbon brush pressing limit seat.

[0017] Further, the carbon brush pressing limit seat includes a pressing limit box. The middle part of the top surface of the pressing limit box is slidably connected to the upper part of the carbon brush pressing block. Installation angle codes are respectively arranged on both sides of the pressing limit box. Positioning screw holes are respectively opened at both ends of the plurality of installation angle codes.

[0018] Furthermore, the zinc block is disposed outside the pump and sinks to the seabed.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] By arranging the aluminum anode mechanism in the turbulent flow area, corrosion of the impeller, shaft and pump body can be prevented; by installing a carbon brush mechanism at the coupling to conduct current, corrosion of the gap between the pump shaft and the shaft sleeve can be prevented; this method can effectively prevent the corrosion problem of the components on the pump side of the seawater pump, improve the corrosion resistance, that is, extend the service life of the pump, avoid equipment defects and hidden dangers caused by corrosion, ensure the safe and stable operation of the factory seawater system, and save the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic view of the external structure of the aluminum anode mechanism of the present invention Figure 1 ;

[0022] Figure 2 is a schematic view of the external structure of the aluminum anode mechanism of the present invention Figure 2 ;

[0023] Figure 3 is a schematic sectional view of the internal structure of the aluminum anode mechanism of the present invention;

[0024] Figure 4 is an exploded view of the internal structure of the aluminum anode mechanism of the present invention;

[0025] Figure 5 is a schematic view of the hub structure of the present invention;

[0026] Figure 6 is a schematic view of the aluminum anode plate structure of the present invention;

[0027] Figure 7 is a schematic view of the carbon brush mechanism structure of the present invention;

[0028] Figure 8 is a schematic sectional view of the carbon brush mechanism structure of the present invention.

[0029] In the figure: 1, pump impeller; 2, aluminum anode mechanism; 21, main fixing seat; 211, bearing fixing seat; 212, fixing middle column; 213, installation thread; 22, closed bearing; 23, bearing support cylinder; 24, hub; 241, shaft sleeve; 242, spoke; 25, aluminum anode plate; 251, through hole; 26, bearing fixing ring; 27, locking nut; 3, coupling; 4, carbon brush mechanism; 41, carbon brush block; 42, carbon brush pressing block; 421, carbon brush fixing seat; 422, pressing guide rod; 43, pressing spring; 44, carbon brush pressing limit seat; 441, pressing limit box; 442, installation angle code; 443, positioning screw hole; 45, zinc block. DETAILED DESCRIPTION OF THE INVENTION

[0030] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosed content of the present invention more thorough and comprehensive.

[0031] It should be noted that when an element is referred to as "fixedly provided on" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0033] For the embodiment, please refer with emphasis to Figure 1-2 and 7, a corrosion prevention method for a seawater intake pump, including a pump impeller 1, and comprising the following method steps:

[0034] S1. Install an aluminum anode mechanism (2) at the turbulent flow area at the inlet of the seawater pump and at the end face of the pump shaft of the pump impeller (1) so that the pump body, the impeller and the pump shaft are all protected against corrosion;

[0035] S2. Install a coupling (3) at one end of the pump shaft of the pump impeller (1) away from the aluminum anode mechanism (2), and install a carbon brush mechanism (4) on one side of the coupling (3), and use the pump shaft and the pump housing as continuous conductors to conduct the stray current.

[0036] For the embodiment, please refer with emphasis to Figure 3-4, the aluminum anode mechanism 2 includes a main fixed seat 21, the bottom surface of the main fixed seat 21 is arranged on the end surface of the rotating shaft of the pump impeller 1, a plurality of sealed bearings 22 are sleeved in the middle of the main fixed seat 21, a bearing support cylinder 23 is sleeved in the middle of the main fixed seat 21 between the plurality of sealed bearings 22, a plurality of hub sleeves 24 are respectively sleeved outside the plurality of sealed bearings 22, a plurality of aluminum anode plates 25 are arranged between the plurality of hub sleeves 24, a bearing fixing ring 26 is sleeved at the other end of the main fixed seat 21, and a locking nut 27 is threadedly connected to the top surface of the bearing fixing ring 26 and the other end of the main fixed seat 21. This design enables the plurality of hub sleeves 24 to rotate freely through the plurality of sealed bearings 22, so that the plurality of aluminum anode plates 25 can rotate freely, thereby enabling the plurality of aluminum anode plates 25 to fully contact the seawater entering the pump body while reducing the resistance of the seawater.

[0037] For the embodiment, please refer to Figure 4 , the main fixed seat 21 includes a bearing fixed seat 211, the bottom surface of the bearing fixed seat 211 is arranged on the end surface of the rotating shaft of the pump impeller 1, the middle of the top surface of the bearing fixed seat 211 is fixedly connected to one end of a fixed middle column 212, and the other end of the fixed middle column 212 is provided with a mounting thread 213.

[0038] For the embodiment, please refer to Figure 5 , the hub sleeve 24 includes a shaft sleeve 241, a plurality of spokes 242 are arranged on the outer side of the shaft sleeve 241, and one side of each of the plurality of spokes 242 is respectively arranged at one end of the aluminum anode plate 25.

[0039] For the embodiment, please refer to Figure 6 , the aluminum anode plate 25 is arranged in a spiral shape, a plurality of through holes 251 are formed in the middle of the aluminum anode plate 25, both ends of the aluminum anode plate 25 are respectively arranged on one side of the plurality of hub sleeves 24, and the thickness of the aluminum anode plate 25 is 5 - 8 mm. This design further reduces the resistance of the aluminum anode plate 25 to the seawater entering the pump body through the plurality of through holes 251 to reduce the load of the pump.

[0040] For the embodiment, please refer to Figure 8 , the carbon brush mechanism 4 includes a carbon brush block 41, the bottom surface of the carbon brush block 41 is slidably connected to one side of the coupling 3, the top surface of the carbon brush block 41 is arranged on the bottom surface of a carbon brush pressing block 42, a pressing spring 43 is sleeved in the middle of the carbon brush pressing block 42, the upper part of the carbon brush pressing block 42 is slidably connected to the middle of a carbon brush pressing limit seat 44, and the upper end of the carbon brush pressing block 42 is electrically connected to a zinc block 45. This design presses the carbon brush pressing block 42 and the carbon brush block 41 downward through the pressing spring 43 so that the carbon brush block 41 is always in contact with the coupling 3.

[0041] For the embodiment, please refer to Figure 8, the carbon brush pressing block 42 includes a carbon brush fixing seat 421, the bottom surface of the carbon brush fixing seat 421 is arranged on the top surface of the carbon brush block 41, a pressing guide rod 422 is arranged in the middle of the top surface of the carbon brush fixing seat 421, a pressing spring 43 is sleeved on the lower part of the pressing guide rod 422, and the upper part of the pressing guide rod 422 is slidably connected to the middle of the carbon brush pressing limit seat 44.

[0042] For the embodiment, please refer with emphasis to Figure 8 , the carbon brush pressing limit seat 44 includes a pressing limit box 441, the middle of the top surface of the pressing limit box 441 is slidably connected to the upper part of the carbon brush pressing block 42, mounting angle codes 442 are respectively arranged on both sides of the pressing limit box 441, and positioning screw holes 443 are respectively opened at both ends of the plurality of mounting angle codes 442.

[0043] In the embodiment, the zinc block 45 is arranged outside the pump and sinks to the seabed.

[0044] The above has made an exemplary description of the present invention in combination with the drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A corrosion prevention method for a seawater intake pump, including the intake pump required in this method and the pump impeller (1) arranged inside the intake pump, characterized in that: The method steps include the following: S1. Install an aluminum anode mechanism (2) at the turbulent area at the inlet of the seawater pump and at the end face of the pump shaft of the pump impeller (1) so that the pump body, the impeller and the pump shaft are all protected against corrosion. S2. Install a coupling (3) at one end of the pump shaft of the pump impeller (1) away from the aluminum anode mechanism (2), and install a carbon brush mechanism (4) on one side of the coupling (3). Using the pump shaft and the pump housing as continuous conductors, the stray current is led out. In the steps of S1 and S2, the aluminum anode mechanism (2) includes a main fixing seat (21). The bottom surface of the main fixing seat (21) is arranged on the end face of the rotating shaft of the pump impeller (1). A plurality of sealed bearings (22) are sleeved in the middle of the main fixing seat (21). A bearing support cylinder (23) is sleeved in the middle of the main fixing seat (21) between the plurality of sealed bearings (22). A plurality of rotating hubs (24) are respectively sleeved outside the plurality of sealed bearings (22). A plurality of aluminum anode plates (25) are arranged between the plurality of rotating hubs (24). A bearing fixing ring (26) is sleeved at the other end of the main fixing seat (21). A locking nut (27) is threadedly connected to the top surface of the bearing fixing ring (26) and the other end of the main fixing seat (21).

2. The corrosion prevention method for a seawater intake pump according to claim 1, characterized in that: The main fixing seat (21) includes a bearing fixing seat (211). The bottom surface of the bearing fixing seat (211) is arranged on the end face of the rotating shaft of the pump impeller (1). One end of a fixing middle column (212) is fixedly connected to the middle of the top surface of the bearing fixing seat (211). An installation thread (213) is arranged at the other end of the fixing middle column (212).

3. The corrosion prevention method for a seawater intake pump according to claim 1, characterized in that: The rotating hub (24) includes a shaft sleeve (241). A plurality of spokes (242) are arranged on the outside of the shaft sleeve (241). One ends of the plurality of spokes (242) are respectively arranged on one side of the aluminum anode plate (25).

4. The corrosion prevention method for a seawater intake pump according to claim 1, characterized in that: The aluminum anode plate (25) is arranged in a spiral shape. A plurality of through holes (251) are formed in the middle of the aluminum anode plate (25). Two ends of the aluminum anode plate (25) are respectively arranged on one side of the plurality of rotating hubs (24).

5. The corrosion prevention method for a seawater intake pump according to claim 1, characterized in that: The thickness of the aluminum anode plate (25) is 5 - 8 mm.

6. The corrosion prevention method for a seawater intake pump according to claim 1, characterized in that: The carbon brush mechanism (4) includes a carbon brush block (41). The bottom surface of the carbon brush block (41) is slidably connected to one side of the coupling (3). The top surface of the carbon brush block (41) is arranged on the bottom surface of a carbon brush pressing block (42). A pressing spring (43) is sleeved in the middle of the carbon brush pressing block (42). The upper part of the carbon brush pressing block (42) is slidably connected to the middle of a carbon brush pressing limit seat (44). The upper end of the carbon brush pressing block (42) is electrically connected to a zinc block (45).

7. The corrosion prevention method for a seawater intake pump according to claim 6, characterized in that: The carbon brush pressing block (42) includes a carbon brush fixing seat (421). The bottom surface of the carbon brush fixing seat (421) is arranged on the top surface of the carbon brush block (41). A pressing guide rod (422) is arranged in the middle of the top surface of the carbon brush fixing seat (421). The pressing spring (43) is sleeved on the lower part of the pressing guide rod (422). The upper part of the pressing guide rod (422) is slidably connected to the middle of the carbon brush pressing limit seat (44).

8. The corrosion prevention method for a seawater intake pump according to claim 6, characterized in that: The carbon brush downward pressure limit seat (44) includes a downward pressure limit box (441). The middle part of the top surface of the downward pressure limit box (441) is slidably connected to the upper part of the carbon brush downward pressure block (42). Mounting angle codes (442) are respectively arranged on both sides of the downward pressure limit box (441), and positioning screw holes (443) are respectively opened at both ends of the plurality of mounting angle codes (442).

9. The corrosion prevention method for a seawater intake pump according to claim 6, characterized in that: The zinc block (45) is arranged outside the pump and sinks to the seabed.

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