Transmission shaft self-protection type integrated sea water pump

Abstract

The invention discloses a transmission shaft self-protection type integrated sea water pump and relates to the field of sea water pumps, the transmission shaft self-protection type integrated sea water pump comprises a sea water pump shell, the bottom end and the side face of the sea water pump shell are connected with a water inlet and a water outlet respectively, a supporting shell, a fixing plate and a motor are installed above the sea water pump shell, and a closed space is formed between the supporting shell and the fixing plate; and a positioning ring, a lower sealing ring and an upper sealing ring are mounted in the sealing ring. In the mounting process of the impeller, the sealing ring at the top end of the impeller and the inner side of the lower sealing ring are sealed for the second time, the top end and the bottom end of the impeller are both connected with the iron sealing rings, and in the using process, the iron sealing rings are extruded, so that a rubber layer at the top end is extruded to deform and enter a clamping groove, and a sealing structure is formed; and at the moment, the electricity connection rod of the upper metal sealing ring is attached to the bottom end of the positioning ring, the lower metal sealing ring is also connected with the upper metal sealing ring through the electricity connection rod, and the lower metal sealing ring is also extruded and sealed through the metal fixing piece.

Description

Technical Field

[0001] This invention relates to the field of seawater pumps, specifically to an integrated seawater pump with a self-protected drive shaft. Background Technology

[0002] Seawater pumps are specialized pumps designed for transporting, pressurizing, or circulating seawater. Unlike ordinary freshwater pumps, their core design revolves around the characteristics of seawater: high corrosiveness, impurities, and susceptibility to biofouling. They are critical fluid transport devices in marine engineering, coastal industry, and maritime sectors, with wide-ranging applications including ships (ballast water transport, main engine cooling), desalination plants (raw water transport), coastal nuclear power plants (circulating cooling water supply), marine ranches (oxygenation and water exchange), and marine engineering construction (dredging assistance). As a key piece of equipment connecting land and marine resource utilization, the reliability of seawater pumps directly impacts the operational efficiency and safety of the entire marine-related system, making them one of the fundamental pieces of equipment driving coastal economic development and marine growth.

[0003] Existing technologies, such as the fully sealed structure of a seawater pump impeller and shaft disclosed in Chinese Patent Publication No. CN216131141U, where the impeller is sleeved on the pump shaft and a mounting surface is formed between them, include a front-end sealing assembly and a rear-end sealing assembly. The front-end sealing assembly includes a sealing cap that covers the front end of the pump shaft, and the rear-end sealing assembly includes an axial seal to prevent axial leakage and a radial seal to prevent radial leakage. It can be concluded that existing technologies employ multiple sets of rubber sealing assemblies for sealing during the sealing process. Furthermore, existing technologies, such as Chinese Patent Publication No. CN114909320A, disclose a corrosion prevention method for a seawater intake pump, including pump impellers, comprising the following steps: S1. An aluminum anode mechanism is installed in the turbulent area at the inlet of the seawater pump and at the pump shaft end face of the pump blades to provide a protective layer for the pump body, impeller and pump shaft. S2. A coupling is installed at the end of the pump shaft away from the aluminum anode mechanism of the pump impeller, and a carbon brush mechanism is added to one side of the coupling. The pump shaft and the pump housing are used as a continuous conductor to conduct the stray current. It can be concluded that in order to protect the internal structure of the seawater pump that is in contact with seawater, the prior art usually adopts the method of sacrificial anode to protect the impeller and bearing structure. Usually, a metal plate structure (such as aluminum) with a higher activity than the impeller and bearing is installed.

[0004] However, existing technologies for sealing rely on wear-resistant material structures (such as metal gaskets) and a single set of sealing rings fixed between the shaft and the connecting seat. However, there are gaps at the impeller-shaft connection point. Existing technologies rarely seal between the impeller and shaft. Furthermore, while the shaft connection is sealed, the corrosive nature of seawater during seawater transport often causes damage to components. Using only rubber is insufficient in strength and prone to deformation under high pressure. Moreover, although existing technologies use O-ring structures for sealing, the rubber rings are easily deformed under prolonged compression. Sealing rings with metal structures are also susceptible to corrosion from seawater. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a self-protecting integrated seawater pump for the drive shaft, so as to solve the technical problems of poor sealing effect and short service life of sealing rubber ring.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A seawater pump housing is provided, with an inlet and an outlet connected to its bottom and side respectively. A support shell, a fixing plate, and a motor are sequentially installed on top of the seawater pump housing. The motor is located inside the fixing plate. A sealed space is formed between the support shell and the fixing plate, and a positioning ring, a lower sealing ring, and an upper sealing ring are installed inside the space. The positioning ring is located inside the lower sealing ring, and the upper sealing ring is fitted onto the outer side of the top of the positioning ring. An output shaft is connected to the output end of the motor, and the output shaft extends into the interior of the positioning ring. Extending into the interior of the seawater pump casing, an impeller is installed inside the seawater pump casing. A sealing ring is connected to the top of the impeller, and the sealing ring is attached to the bottom end of the lower sealing ring. Multiple sets of blades are installed inside the impeller, and fixing rings are installed at both the top and bottom of the blades. Iron sealing rings are installed on the inner wall and top of the impeller. A metal fixing plate is connected to the outside of the output end of the output shaft inside the impeller. The output shaft is fixedly connected to the impeller through the metal fixing plate. An anode plate is provided inside the impeller, and the impeller and the iron sealing ring are both connected to the anode plate.

[0007] By adopting the above technical solution, the motor can easily drive the impeller to rotate, drawing seawater into the seawater pump casing and discharging it through the outlet, thus improving the drainage effect. In addition, during use, the connection between the impeller and the output shaft can be sealed by an iron sealing ring, and the connection can be protected by an anode plate.

[0008] The present invention is further configured such that the positioning ring is a long cylindrical shape, and the end of the positioning ring is connected to a bent sealing kit. The positioning ring is fixedly connected to the inner wall of the lower sealing ring through the sealing kit. The inner wall of the positioning ring is provided with a side sealing groove, and a rubber sealing ring is installed inside the side sealing groove to limit and seal the connection position between the output shaft and the positioning ring.

[0009] Preferably, the output shaft can be easily limited, and during use, the space between the support shell and the fixed plate is sealed by the sealing element.

[0010] The present invention is further configured such that an upper sealing groove is provided at the top of the impeller and a lower sealing groove is provided at the bottom of the impeller, and two sets of iron sealing rings are respectively located inside the upper sealing groove and the lower sealing groove. The upper sealing groove is aligned with the bottom of the positioning ring, and the lower sealing groove is aligned with the inner wall of the metal fixing plate.

[0011] Preferably, it can easily limit and engage the iron sealing ring, perform initial fixation, improve the stability of the iron sealing ring, and facilitate alignment.

[0012] The invention is further configured such that the inner wall of the impeller is connected to multiple sets of conductive rods, and the conductive rods penetrate the impeller. Each conductive rod includes a return spring and a connecting slide rod. The conductive rod is elastically connected to the connecting slide rod through the return spring, and the bottom end of the connecting slide rod extends to the bottom of the impeller. The top end of the conductive rod is connected to a limiting head, which is located above the upper sealing groove. The bottom end of the connecting slide rod is located inside the lower sealing groove. The two sets of iron sealing rings are electrically connected through the conductive rods.

[0013] Preferably, the upper and lower sets of iron sealing rings can be easily electrically connected.

[0014] The present invention is further configured such that the iron sealing ring includes a fixed iron ring and a rubber layer, the outer wall of the fixed iron ring is connected to multiple sets of conductive rods, the conductive rods extend through to the outer side of the rubber layer, the side of the rubber layer away from the fixed iron ring is provided with a snap-fit ​​groove, the conductive rods are located inside the snap-fit ​​groove, the iron sealing ring is attached to the conductive rods through the fixed iron ring, when the impeller is installed outside the output shaft, the iron sealing ring is squeezed to fit against the outer wall of the positioning ring, and the conductive rods are attached to the outer wall of the positioning ring.

[0015] Preferably, the rubber layer can be used for sealing, and the fixing ring can be used for limiting and fixing, which improves the installation stability.

[0016] The present invention is further configured such that the anode plate is located inside the water inlet, and the anode plate is fan-shaped, a scraper is connected to the back of the anode plate, the scraper is in contact with the inner wall of the water inlet, an annular engaging conductive ring is connected to the top of the scraper, the engaging conductive ring is fixedly connected to the bottom end of the impeller, and the outer wall of the metal fixing plate is in contact with the blade of the inner wall of the impeller.

[0017] Preferably, the anode plate is rotated to clean the outer wall of the inlet while the water flows.

[0018] The present invention is further configured such that the anode plate is annular, and the shape of the anode plate matches the shape between the blade and the upper fixing ring. The inner wall of the anode plate is provided with multiple sets of scrapers, and the inner wall of the metal fixing plate is provided with multiple sets of positioning slots. The scrapers are engaged with the metal fixing plate through the positioning slots, and the positioning slots are aligned with the outer side of the lower iron sealing ring. The anode plate is surrounded by the outer wall of the metal fixing plate.

[0019] Preferably, this reduces the impact of water flow on the anode plates and improves their service life.

[0020] The present invention is further configured such that a connecting piece is connected to the top end of the metal fixing piece, and the connecting piece is in contact with the bottom end of the output shaft; a locking bolt is connected to the bottom end of the metal fixing piece; and the metal fixing piece is fixedly connected to the end of the output shaft by the locking bolt.

[0021] Preferably, it facilitates the fixed connection between the impeller and the output shaft.

[0022] In summary, the present invention has the following main beneficial effects: This invention employs multiple sealing structures. During assembly, the output shaft is initially sealed via a bidirectional sealing ring. During impeller installation, a second seal is achieved between the sealing ring at the top of the impeller and the inner side of the lower sealing ring. Both the top and bottom of the impeller are connected to iron sealing rings. During use, the iron sealing rings are compressed, causing the top rubber layer to deform and enter the engagement groove, forming a sealing structure. Simultaneously, the connecting rod of the upper metal sealing ring is in contact with the bottom of the positioning ring, and the lower metal sealing ring is connected to the upper metal sealing ring via the connecting rod. The lower metal sealing ring is also sealed by a metal fixing plate and connected to the anode plate via the metal fixing plate, thus connecting the anode plate to both sets of metal sealing rings and protecting them.

[0023] This invention utilizes a fan-shaped anode plate, which includes a scraper and a locking conductive ring. During installation, the anode plate and scraper are positioned at the inlet, with the scraper adhering to the inner wall of the inlet. During rotation, the scraper cleans the inner wall of the inlet and drives the anode plate to rotate at the inlet, promoting water flow and assisting in water intake. Furthermore, the anode plate is positioned around the perimeter during rotation, requiring a smaller support structure that is not located in the center, effectively reducing obstruction to the seawater pump's intake and improving water intake efficiency.

[0024] This invention, by setting a disc-shaped anode plate, can effectively reduce the impact of the anode plate on the water flow. During use, the water flow velocity through the anode plate is relatively low (relative to the inlet position), which can effectively reduce the water flow impact on the anode plate, thereby improving the service life of the anode plate. Furthermore, the anode plate engages with the groove at the top of the impeller, which can effectively increase the contact area between the anode plate and the impeller before the anode plate is completely corroded, reducing the possibility of the impeller being corroded by seawater and improving the protection of the impeller. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the water inlet structure of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the seawater pump casing of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the impeller of the present invention; Figure 5 This is a schematic cross-sectional view of the seawater pump casing of the present invention; Figure 6 For the present invention Figure 5 A magnified schematic diagram of the partial structure at point A in the middle; Figure 7 This is a schematic diagram of the conductive rod and two sets of iron sealing rings of the present invention; Figure 8 This is a schematic diagram of the structure of the metal fixing piece of the present invention; Figure 9 This is an exploded structural diagram of the iron sealing ring of the present invention; Figure 10 This is a schematic cross-sectional view of the seawater pump casing according to the second embodiment of the present invention; Figure 11 This is a schematic diagram of the structure of the metal fixing piece according to the second embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures: 1. Seawater pump casing; 101. Inlet; 102. Outlet; 103. Support shell; 104. Fixing plate; 105. Motor; 1051. Output shaft; 2. Positioning ring; 201. Side sealing groove; 3. Lower sealing ring; 4. Upper sealing ring; 5. Impeller; 501. Sealing ring; 502. Upper sealing groove; 503. Lower sealing groove; 6. Anode plate; 601. Scraper; 602. Engaging conductive ring; 603. Positioning block; 7. Conductive rod; 701. Return spring; 702. Connecting slide rod; 703. Limiting head; 8. Iron sealing ring; 801. Fixing iron ring; 802. Rubber layer; 803. Engaging slot; 804. Connecting rod; 9. Metal fixing plate; 901. Connecting plate; 902. Positioning groove; 10. Locking bolt. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] The embodiments of the present invention will now be described.

[0029] First embodiment:

[0030] Please see Figures 1 to 3 The self-protected integrated seawater pump includes a seawater pump housing 1. The bottom and side of the seawater pump housing 1 are respectively connected to an inlet 101 and an outlet 102. A support shell 103, a fixing plate 104, and a motor 105 are sequentially installed on the top of the seawater pump housing 1. The motor 105 is located inside the fixing plate 104. A sealed space is formed between the support shell 103 and the fixing plate 104, and a positioning ring 2, a lower sealing ring 3, and an upper sealing ring 4 are installed inside the space. The positioning ring 2 is located inside the lower sealing ring 3, and the upper sealing ring 4 is sleeved on the outer side of the top of the positioning ring 2. The output end of the motor 105 is connected to an output shaft 1051, and the output shaft 1051 extends into the interior of the positioning ring 2 and the interior of the seawater pump housing 1, which facilitates the assembly of the seawater pump.

[0031] Please see Figures 5 to 9An impeller 5 is installed inside the seawater pump casing 1. A sealing ring 501 is connected to the top of the impeller 5, and the sealing ring 501 fits against the bottom of the lower sealing ring 3. Multiple sets of blades are installed inside the impeller 5, and fixing rings are installed at both the top and bottom of the blades. An upper sealing groove 502 is opened at the top of the impeller 5, and a lower sealing groove 503 is opened at the bottom of the impeller 5. Two sets of iron sealing rings 8 are located inside the upper sealing groove 502 and the lower sealing groove 503, respectively. The upper sealing groove 502 is aligned with the bottom of the positioning ring 2, and the lower sealing groove 503 is aligned with the inner wall of the metal fixing plate 9. Iron sealing rings 8 are installed on both the inner wall and the top of the impeller 5. The iron sealing rings 8 include A fixed iron ring 801 is connected to a rubber layer 802. Multiple sets of connecting rods 804 are connected to the outer wall of the fixed iron ring 801. The connecting rods 804 extend through to the outer side of the rubber layer 802. A snap-fit ​​groove 803 is opened on the side of the rubber layer 802 away from the fixed iron ring 801. The connecting rods 804 are located inside the snap-fit ​​groove 803. The iron sealing ring 8 is attached to the conductive rod 7 through the fixed iron ring 801. When the impeller 5 is installed outside the output shaft 1051, the iron sealing ring 8 is squeezed to fit against the outer wall of the positioning ring 2, and the connecting rods 804 are attached to the outer wall of the positioning ring 2. The upper and lower parts of the impeller 5 can be sealed by the two sets of iron sealing rings 8, thereby improving the sealing effect.

[0032] Please see Figures 5 to 8 Multiple sets of conductive rods 7 are connected to the inner wall of the impeller 5, and the conductive rods 7 penetrate the impeller 5. Each conductive rod 7 includes a return spring 701 and a connecting slide rod 702. The conductive rods 7 are elastically connected to the connecting slide rod 702 through the return spring 701, and the bottom end of the connecting slide rod 702 extends to the bottom of the impeller 5. A limiting head 703 is connected to the top end of the conductive rod 7. The limiting head 703 is located above the upper sealing groove 502, and the bottom end of the connecting slide rod 702 is located inside the lower sealing groove 503. The two sets of iron sealing rings 8 are electrically connected through the conductive rods 7, facilitating... The iron sealing ring 8 is electrically connected. The inside of the impeller 5 is connected to the outside of the output end of the output shaft 1051. The output shaft 1051 is fixedly connected to the impeller 5 through the metal fixing plate 9. The top of the metal fixing plate 9 is connected to the connecting plate 901, and the connecting plate 901 is in contact with the bottom end of the output shaft 1051. The bottom end of the metal fixing plate 9 is connected to the locking bolt 10. The metal fixing plate 9 is fixedly connected to the end of the output shaft 1051 through the locking bolt 10, which can easily fix the impeller to the output shaft 1051.

[0033] Please see Figure 3The impeller 5 contains an anode plate 6 made of aluminum. The anode plate 6 has a higher activity than the impeller 5 and the iron sealing ring 8. The impeller 5 and the iron sealing ring 8 are both connected to the anode plate 6. In seawater, the anode plate 6... Oxidation and dissolution occur preferentially, releasing electrons that flow to the impeller 5 and the iron sealing ring 8, keeping them in a cathode state and preventing self-corrosion. The anode plate 6 is located inside the inlet 101 and is fan-shaped. A scraper 601 is connected to the back of the anode plate 6, and the scraper 601 is in contact with the inner wall of the inlet 101. The top of the scraper 601 is connected to an annular engaging conductive ring 602, which is fixedly connected to the bottom of the impeller 5. The outer wall of the metal fixing plate 9 is in contact with the inner wall blades of the impeller 5. During use, the impeller 5 drives the anode plate 6 to rotate, thereby driving the scraper 601 to clean the inlet 101. During rotation, the anode plate 6 itself can drive the seawater to flow upward, improving the water intake effect. When the anode plate 6 rotates, it can change the seawater outside the anode plate 6, improving the ion flow efficiency and increasing the oxidation rate.

[0034] For details regarding the above embodiments, please refer to [link / reference]. Figure 7 The positioning ring 2 is a long cylindrical shape, and the end of the positioning ring 2 is connected to a bent sealing kit. The positioning ring 2 is fixedly connected to the inner wall of the lower sealing ring 3 through the sealing kit. The inner wall of the positioning ring 2 is provided with a side sealing groove 201, and a rubber sealing ring is installed inside the side sealing groove 201 to limit and seal the connection position between the output shaft 1051 and the positioning ring 2.

[0035] Second embodiment:

[0036] Please see Figures 10 to 11 This is the second embodiment of the present application, which differs in the structure and installation position of the anode plate 6. Specifically, the anode plate 6 is annular, and the shape of the anode plate 6 matches the shape between the blade and the upper fixing ring. Multiple sets of scrapers 601 are provided on the inner wall of the anode plate 6, and multiple sets of positioning slots 902 are provided on the inner wall of the metal fixing plate 9. The scrapers 601 are engaged with the metal fixing plate 9 through the positioning slots 902, and the positioning slots 902 are aligned with the outer side of the lower iron sealing ring 8. The anode plate 6 is surrounded by the outer wall of the metal fixing plate 9, which facilitates the cleaning of the anode plate 6, reduces the flow of seawater on the outside of the anode plate 6, reduces the water erosion effect of the anode plate 6, and improves the service life of the anode plate 6.

[0037] During installation, the motor 105 is first inserted into the fixing plate 104. Then, the positioning ring 2 passes through the lower sealing ring 3. Next, the upper sealing ring 4 is installed above the top of the positioning ring 2 to fix it in place. Then, the motor 105 and fixing plate 104 are placed on top of the support shell 103, with the output shaft 1051 of the motor 105 passing through the positioning ring 2. Finally, the impeller 5 is engaged below the lower sealing ring 3, limited by the sealing ring 501, and fitted onto the outside of the output shaft 1051. At this point, the impeller 5 pushes the upper iron sealing ring 8 against the positioning ring 2. The bottom end fits together with the sealing ring 501 to double seal the inside of the positioning ring 2, improving the sealing effect. Then, the impeller 5 is fixed on the output shaft 1051 by the metal fixing plate 9. Then, the seawater pump housing 1 is connected to the support housing 103, and the impeller 5 is inserted into the seawater pump housing 1 at the same time. The impeller 5 is aligned with the water inlet 101. Then, the anode plate 6 is installed in a suitable position and positioned by the fixing mechanism. The anode plate 6 is connected to the impeller 5 and the iron sealing ring 8. Finally, the fixing plate 104, the support housing and the seawater pump housing 1 are fixed together by bolts, realizing the assembly of the seawater pump. During use, the motor 105 is started, and the motor 105 drives the impeller 5 to rotate through the output shaft 1051. The impeller 5 draws external water from the inlet 101 into the seawater pump casing 1 and discharges it through the outlet 102. When the water flows, it is connected to the impeller 5 and the upper and lower sets of iron sealing rings 8 through the anode plate 6, forming an electrochemical reaction. The anode plate 6 is corroded, thereby ensuring the service life of the impeller 5 and the iron sealing rings 8.

[0038] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A self-protected integrated seawater pump with a drive shaft, comprising a seawater pump housing (1), characterized in that: The bottom and side of the seawater pump casing (1) are respectively connected to an inlet (101) and an outlet (102). A support shell (103), a fixing plate (104), and a motor (105) are installed sequentially on the top of the seawater pump casing (1). The motor (105) is located inside the fixing plate (104). A sealed space is formed between the support shell (103) and the fixing plate (104), and a positioning ring (2), a lower sealing ring (3), and an upper sealing ring (4) are installed inside. The positioning ring (2) is located inside the lower sealing ring (3), and the upper sealing ring (4) is sleeved on the outside of the top of the positioning ring (2). The output end of the motor (105) is connected to an output shaft (1051), and the output shaft (1051) extends into the interior of the positioning ring (2). Extending into the interior of the seawater pump housing (1), an impeller (5) is installed inside the seawater pump housing (1). A sealing ring (501) is connected to the top of the impeller (5). The sealing ring (501) is attached to the bottom of the lower sealing ring (3). Multiple sets of blades are installed inside the impeller (5), and a fixing ring is installed at both the top and bottom of the blades. An iron sealing ring (8) is installed on the inner wall and top of the impeller (5). A metal fixing plate (9) is connected to the outside of the output end of the output shaft (1051) inside the impeller (5). The output shaft (1051) is fixedly connected to the impeller (5) through the metal fixing plate (9). An anode plate (6) is provided inside the impeller (5). The impeller (5) and the iron sealing ring (8) are connected to the anode plate (6).

2. The self-protected integrated seawater pump with drive shaft according to claim 1, characterized in that: The positioning ring (2) is a long cylindrical shape, and the end of the positioning ring (2) is connected to a bent sealing kit. The positioning ring (2) is fixedly connected to the inner wall of the lower sealing ring (3) through the sealing kit. The inner wall of the positioning ring (2) is provided with a side sealing groove (201), and a rubber sealing ring is installed inside the side sealing groove (201) to limit and seal the connection position between the output shaft (1051) and the positioning ring (2).

3. The self-protected integrated seawater pump with drive shaft according to claim 1, characterized in that: The impeller (5) has an upper sealing groove (502) at its top and a lower sealing groove (503) at its bottom. Two sets of iron sealing rings (8) are located inside the upper sealing groove (502) and the lower sealing groove (503) respectively. The upper sealing groove (502) is aligned with the bottom of the positioning ring (2), and the lower sealing groove (503) is aligned with the inner wall of the metal fixing piece (9).

4. The self-protected integrated seawater pump with a drive shaft according to claim 3, characterized in that: The inner wall of the impeller (5) is connected to multiple sets of conductive rods (7), and the conductive rods (7) penetrate the impeller (5). The conductive rods (7) include a return spring (701) and a connecting slide rod (702). The conductive rods (7) are elastically connected to the connecting slide rod (702) through the return spring (701), and the bottom end of the connecting slide rod (702) extends to the bottom of the impeller (5). The top end of the conductive rod (7) is connected to a limiting head (703). The limiting head (703) is located above the upper sealing groove (502), and the bottom end of the connecting slide rod (702) is located inside the lower sealing groove (503). The two sets of iron sealing rings (8) are electrically connected through the conductive rods (7).

5. The self-protected integrated seawater pump with drive shaft according to claim 1, characterized in that: The iron sealing ring (8) includes a fixed iron ring (801) and a rubber layer (802). The outer wall of the fixed iron ring (801) is connected to multiple sets of connecting rods (804). The connecting rods (804) extend through to the outside of the rubber layer (802). The side of the rubber layer (802) away from the fixed iron ring (801) is provided with a snap-fit ​​groove (803). The connecting rods (804) are located inside the snap-fit ​​groove (803). The iron sealing ring (8) is attached to the conductive rod (7) through the fixed iron ring (801). When the impeller (5) is installed outside the output shaft (1051), it squeezes the iron sealing ring (8) to be attached to the outer wall of the positioning ring (2), and the connecting rods (804) are attached to the outer wall of the positioning ring (2).

6. The self-protected integrated seawater pump with drive shaft according to claim 1, characterized in that: The anode plate (6) is located inside the inlet (101), and the anode plate (6) is fan-shaped. A scraper (601) is connected to the back of the anode plate (6). The scraper (601) is attached to the inner wall of the inlet (101). An annular locking conductive ring (602) is connected to the top of the scraper (601). The locking conductive ring (602) is fixedly connected to the bottom end of the impeller (5). The outer wall of the metal fixing plate (9) is attached to the inner wall blade of the impeller (5).

7. The self-protected integrated seawater pump with drive shaft according to claim 1, characterized in that: The anode plate (6) is annular, and the shape of the anode plate (6) matches the shape between the blade and the upper fixing ring. Multiple sets of scrapers (601) are provided on the inner wall of the anode plate (6), and multiple sets of positioning slots (902) are provided on the inner wall of the metal fixing plate (9). The scraper (601) is engaged with the metal fixing plate (9) through the positioning slots (902), and the positioning slots (902) are aligned with the outer side of the lower iron sealing ring (8). The anode plate (6) surrounds the outer wall of the metal fixing plate (9).

8. The self-protected integrated seawater pump with drive shaft according to claim 1, characterized in that: The top end of the metal fixing plate (9) is connected to a connecting plate (901), and the connecting plate (901) is in contact with the bottom end of the output shaft (1051). The bottom end of the metal fixing plate (9) is connected to a locking bolt (10), and the metal fixing plate (9) is fixedly connected to the end of the output shaft (1051) by the locking bolt (10).

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