Self-protecting integrated seawater pump

Abstract

The application discloses a transmission shaft self-protection type integrated seawater pump and relates to the field of seawater pumps.The seawater pump shell is provided with a water inlet and a water outlet connected to the bottom end and the side face respectively;the upper portion of the seawater pump shell is provided with a supporting shell, a fixed plate and a motor;the supporting shell and the fixed plate form a closed space, and the inside is provided with a positioning ring, a lower sealing ring and an upper sealing ring.In the process of installing the impeller, the inside of the lower sealing ring is also sealed for the second time, and the top and bottom of the impeller are both connected with iron sealing rings.In the process of use, the iron sealing rings are extruded, so that the top rubber layer is deformed and enters the clamping groove, forming a sealing structure, and the upper metal sealing ring is connected with the lower metal sealing ring through the electric connection rod, and the lower metal sealing ring is also extruded and sealed by the metal fixed plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of seawater pumps, in particular to a transmission shaft self-protection integrated seawater pump. BACKGROUND

[0002] Seawater pumps are special pump devices specially used for transporting, pressurizing or circulating seawater, which are different from ordinary freshwater pumps. The core design revolves around the characteristics of seawater, such as high corrosiveness, impurity content and easy biological attachment. Seawater pumps are key fluid conveying devices in the fields of marine engineering, coastal industry and maritime affairs. They have a wide range of applications, covering ship (ballast water transportation, main engine cooling), seawater desalination plant (raw water transportation), coastal nuclear power plant (circulating cooling water supply), marine ranching (oxygenation and water exchange), and marine engineering construction (dredging assistance). As a key device connecting land and marine resource utilization, the reliability of seawater pumps directly affects the operation efficiency and safety of the entire marine-related system, and is one of the basic equipment for promoting coastal economy and marine development.

[0003] Prior art, such as a seawater pump impeller and pump shaft full sealing structure disclosed in Chinese patent publication No. CN216131141U, the impeller is sleeved on the pump shaft and a fitting surface is formed between the two. The fitting surface includes a shaft front end sealing assembly and a shaft rear end sealing assembly. The shaft front end sealing assembly includes a sealing cap that covers the front end of the pump shaft. The shaft rear end sealing assembly includes an axial seal to prevent axial leakage and a radial seal to prevent radial leakage. In the existing sealing process, multiple rubber sealing assemblies are used for sealing. In the prior art, such as Chinese publication No. CN114909320A, a seawater intake pump corrosion prevention method is disclosed, which includes a pump blade and the following method steps:

[0004] S1. An aluminum anode mechanism is installed at the inlet turbulent flow area of the seawater pump and the pump shaft end surface of the pump blade, which protects the pump body, impeller and pump shaft;

[0005] S2. A shaft coupling is installed at the end of the pump shaft away from the aluminum anode mechanism of the pump blade, and a carbon brush mechanism is installed on one side of the shaft coupling. The pump shaft and pump housing are used as continuous conductors to discharge stray current. In the prior art, in order to protect the structure of the seawater pump that contacts seawater, a sacrificial anode method is usually used to protect the impeller and bearing structure. A metal sheet structure (such as aluminum) with higher activity than the impeller and bearing is usually installed.

[0006] But the prior art in the sealing process is through the wear-resistant material structure as the design point (such as metal gasket ring, etc.), a single set of sealing ring is fixed between the rotating shaft and the connecting seat, and the sealing is carried out, but there is also a gap between the impeller and the rotating shaft connection position, and the prior art rarely seals between the impeller and the rotating shaft, secondly, the rotating shaft connection position is sealed, but during the seawater conveying process, the seawater itself is corrosive many times, causing parts corrosion and damage, if only rubber material is used, the strength is not enough, and in the high pressure environment, the rubber ring is easy to deform, and in the sealing process of the prior art, although the O-shaped rubber ring structure is used for sealing, the rubber ring is easy to deform under long-term extrusion, and if the sealing ring with metal structure is used, it is easy to be corroded by seawater. SUMMARY

[0007] Therefore, the transmission shaft self-protection type integrated seawater pump is provided to solve the technical problems of poor sealing effect and low service life of the sealing rubber ring.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a seawater pump shell, the bottom end and the side surface of the seawater pump shell are connected with a water inlet and a water outlet respectively, the upper part of the seawater pump shell is sequentially provided with a support shell, a fixed plate and a motor, the motor is located on the inner side of the fixed plate, a closed space is formed between the support shell and the fixed plate, and a positioning ring, a lower sealing ring and an upper sealing ring are installed inside, the positioning ring is located inside the lower sealing ring, the upper sealing ring is sleeved on the outer side of the top end of the positioning ring, the output end of the motor is connected with an output shaft, and the output shaft extends to the inside of the positioning ring and the inside of the seawater pump shell, a impeller is installed in the inside of the seawater pump shell, the top end of the impeller is connected with a sealing ring, the sealing ring is attached to the bottom end of the lower sealing ring, a plurality of blades are installed in the inside of the impeller, and the top end and the bottom end of the blades are both provided with a fixed ring, the inner wall and the top end of the impeller are both provided with an iron sealing ring, a metal fixed plate is connected on the outside of the output end of the output shaft in the inside of the impeller, the output shaft is fixedly connected with the impeller through the metal fixed plate, an anode plate is arranged in the inside of the impeller, and the impeller and the iron sealing ring are both connected with the anode plate.

[0009] By adopting the above technical scheme, the motor can drive the impeller to rotate, the external seawater can be sucked into the seawater pump shell, and the seawater can be discharged through the water outlet, the drainage effect is improved, and in the use process, the connection position of the impeller and the output shaft can be sealed by the iron sealing ring, and the connection position can be protected by the anode plate.

[0010] The application is further provided with the positioning ring being long tube type, and the end of the positioning ring being connected with the bent sealing sleeve, the positioning ring being fixedly connected with the inner wall of the lower sealing ring through the sealing sleeve, the inner wall of the positioning ring being provided with the side sealing groove, and the rubber sealing ring being installed inside the side sealing groove for limiting and sealing the connecting position of the output shaft and the positioning ring.

[0011] As preferred, the output shaft can be conveniently limited, and the space between the supporting shell and the fixed plate is sealed by the sealing member during use.

[0012] The application is further provided with the top end of the impeller being provided with the upper sealing clamping groove, the bottom end of the impeller being provided with the lower sealing clamping groove, and the two groups of iron sealing rings being respectively located inside the upper sealing clamping groove and the lower sealing clamping groove, the upper sealing clamping groove being aligned with the bottom end of the positioning ring, and the lower sealing clamping groove being aligned with the inner wall of the metal fixed plate.

[0013] As preferred, the iron sealing ring can be conveniently limited, clamped and fixed, the stability of the iron sealing ring is improved, and alignment is facilitated.

[0014] The application is further provided with the inner wall of the impeller being connected with a plurality of conductive rods, and the conductive rods penetrating through the impeller, the conductive rod comprising a return spring and a connecting slide rod, the conductive rod being elastically connected with the connecting slide rod through the return spring, the bottom end of the connecting slide rod extending below the impeller, the top end of the conductive rod being connected with a limiting head located above the upper sealing clamping groove, the bottom end of the connecting slide rod being located inside the lower sealing clamping groove, and the two groups of iron sealing rings being electrically connected through the conductive rods.

[0015] As preferred, the upper and lower two groups of iron sealing rings can be conveniently electrically connected.

[0016] The application is further provided with the iron sealing ring comprising a fixed iron ring and a rubber layer, the outer wall of the fixed iron ring being connected with a plurality of electric connection rods, the electric connection rods extending through to the outside of the rubber layer, the side of the rubber layer away from the fixed iron ring being provided with a clamping groove, the electric connection rods being located inside the clamping groove, the iron sealing ring being attached with the conductive rod through the fixed iron ring, and the iron sealing ring and the outer wall of the positioning ring being attached when the impeller is installed outside the output shaft, and the electric connection rods and the outer wall of the positioning ring being attached.

[0017] As preferred, the rubber layer can be used for sealing, the fixed iron ring can be used for limiting and fixing, and the installation stability is improved.

[0018] The anode sheet is located inside the water inlet, and the anode sheet is a fan-shaped sheet, the back of the anode sheet is connected with a scraper, the scraper is attached to the inner wall of the water inlet, the top end of the scraper is connected with a ring-shaped clamping conductive ring, the clamping conductive ring is fixedly connected with the bottom end of the impeller, and the outer wall of the metal fixing sheet is attached to the inner wall of the impeller blade.

[0019] As preferred, the anode sheet is driven to rotate, the outer wall of the water inlet is cleaned, and the water flow is driven to flow by rotating the anode sheet.

[0020] The anode sheet is a circular ring, the shape of the anode sheet is matched with the shape between the blade and the upper fixing ring, a plurality of positioning clamping blocks are arranged on the inner wall of the anode sheet, a plurality of positioning clamping grooves are arranged on the outer wall of the metal fixing sheet, the positioning clamping blocks are clamped and connected with the metal fixing sheet through the positioning clamping grooves, the positioning clamping grooves are aligned with the outer side of the lower iron sealing ring, and the anode sheet surrounds the outer wall of the metal fixing sheet.

[0021] As preferred, the impact of the water flow on the anode sheet can be reduced, and the service life of the anode sheet is improved.

[0022] The top end of the metal fixing sheet is connected with a connecting sheet, the connecting sheet is attached to the bottom end of the output shaft, the bottom end of the metal fixing sheet is connected with a locking bolt, and the metal fixing sheet is fixedly connected with the end portion of the output shaft through the locking bolt.

[0023] As preferred, the impeller and the output shaft are fixedly connected.

[0024] In summary, the present application mainly has the following advantages:

[0025] The plurality of sealing structures are arranged, the output shaft is sealed for the first time through the bidirectional sealing ring in the assembly process, the sealing ring at the top end of the impeller is also sealed for the second time with the inner side of the lower sealing ring in the installation process of the impeller, the top end and the bottom end of the impeller are both connected with the iron sealing ring, the iron sealing ring is extruded in the use process, so that the top end rubber layer is deformed and enters the clamping groove, a sealing structure is formed, the power rod of the upper metal sealing ring is attached to the bottom end of the positioning ring at this time, the lower metal sealing ring is connected with the upper metal sealing ring through the power rod, the lower metal sealing ring is also extruded and sealed through the metal fixing sheet, and the lower metal sealing ring is also connected with the anode sheet through the metal fixing sheet, so that the anode sheet and the two metal sealing rings are connected, and the metal sealing ring is protected.

[0026] The application sets the fan-shaped anode sheet, which includes the scraper and the clamping conductive ring, can install the anode sheet and the scraper to the water inlet position, and the scraper is attached to the inner wall of the water inlet, in the rotating process, the scraper scrapes and cleans the inner wall of the water inlet, drives the anode sheet to rotate at the water inlet position, drives the water flow, assists the water inlet, and installs the anode sheet at the peripheral position in the rotating process, the supporting structure is small, and is not located at the middle position, which can effectively reduce the water inlet shielding of the seawater pump and improve the water inlet efficiency.

[0027] The application sets the disc-shaped anode sheet, which can also effectively reduce the influence of the anode sheet on the water flow, and in the use process, the water flow speed through the anode sheet is low (relative to the water inlet position), thereby effectively reducing the water flow impact on the anode sheet, improving the service life of the anode sheet, and the anode sheet is clamped with the top groove of the impeller, which can effectively improve the contact area of the anode sheet with the impeller before the anode sheet is completely corroded, reduce the seawater corrosion of the impeller, and improve the protection of the impeller. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the application;

[0029] Figure 2 It is a structural schematic diagram of the water inlet of the application;

[0030] Figure 3 It is a structural schematic diagram of the seawater pump shell section of the application;

[0031] Figure 4 It is a structural schematic diagram of the impeller section of the application;

[0032] Figure 5 It is a sectional structural schematic diagram of the seawater pump shell of the application;

[0033] Figure 6 It is a structural schematic diagram of the application Figure 5 It is a local enlarged structural schematic diagram of A in the application;

[0034] Figure 7 It is a structural schematic diagram of the conductive rod and two groups of iron sealing rings of the application;

[0035] Figure 8 It is a structural schematic diagram of the metal fixed sheet of the application;

[0036] Figure 9 It is an explosion structural schematic diagram of the iron sealing ring of the application;

[0037] Figure 10 It is a sectional structural schematic diagram of the seawater pump shell of the second embodiment of the application;

[0038] Figure 11The second embodiment of the application is a structural schematic diagram of a metal fixing plate.

[0039] Reference signs:

[0040] 1, sea water pump shell; 101, water inlet; 102, water outlet; 103, support shell; 104, fixed 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 clamping groove; 503, lower sealing clamping groove; 6, anode plate; 601, scraper; 602, clamping conductive ring; 603, positioning clamping block; 7, conductive rod; 701, reset spring; 702, connecting slide rod; 703, limiting head; 8, iron sealing ring; 801, fixed iron ring; 802, rubber layer; 803, clamping slot; 804, power connection rod; 9, metal fixing plate; 901, connecting plate; 902, positioning clamping groove; 10, locking bolt. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. The embodiments described below with reference to the drawings are exemplary and are used only for explaining the application, and cannot be understood as a limitation of the application.

[0042] The embodiments of the application will be described below according to the overall structure of the application.

[0043] First embodiment:

[0044] Please refer to Figures 1 to 3 The drive shaft self-protection integrated sea water pump comprises a sea water pump shell 1, a water inlet 101 and a water outlet 102 connected to the bottom end and the side of the sea water pump shell 1 respectively, a support shell 103, a fixed plate 104 and a motor 105 sequentially installed above the sea water pump shell 1, the motor 105 located inside the fixed plate 104, a closed space formed between the support shell 103 and the fixed plate 104, and a positioning ring 2, a lower sealing ring 3 and an upper sealing ring 4 installed inside the closed space, the positioning ring 2 located inside the lower sealing ring 3, the upper sealing ring 4 sleeved outside the top end of the positioning ring 2, an output shaft 1051 connected to the output end of the motor 105, the output shaft 1051 extending to the inside of the positioning ring 2, the output shaft 1051 extending to the inside of the sea water pump shell 1, and the sea water pump being convenient to assemble.

[0045] Please refer to Figures 5 to 9The inside of the seawater pump shell 1 is provided with an impeller 5, the top end of the impeller 5 is connected with a sealing ring 501, the sealing ring 501 is attached to the bottom end of the lower sealing ring 3, a plurality of groups of blades are arranged in the impeller 5, and the top end and the bottom end of the blade are both provided with a fixing ring, the top end of the impeller 5 is provided with an upper sealing clamping groove 502, the bottom end of the impeller 5 is provided with a lower sealing clamping groove 503, two groups of iron sealing rings 8 are arranged in the upper sealing clamping groove 502 and the lower sealing clamping groove 503, the upper sealing clamping groove 502 is aligned with the bottom end of the positioning ring 2, the lower sealing clamping groove 503 is aligned with the inner wall of the metal fixing plate 9, the inner wall and the top end of the impeller 5 are both provided with an iron sealing ring 8, the iron sealing ring 8 comprises a fixed iron ring 801 and a rubber layer 802, a plurality of groups of electric connecting rods 804 are connected to the outer wall of the fixed iron ring 801, the electric connecting rods 804 extend through to the outside of the rubber layer 802, the side away from the fixed iron ring 801 of the rubber layer 802 is provided with a clamping groove 803, the electric connecting rods 804 are arranged in the clamping 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 arranged outside the output shaft 1051, the iron sealing ring 8 and the outer wall of the positioning ring 2 are attached by extrusion, and the electric connecting rods 804 are attached to the outer wall of the positioning ring 2, so that the upper part and the lower part of the impeller 5 can be sealed by the two groups of iron sealing rings 8, and the sealing effect is improved.

[0046] Please refer to Figures 5 to 8 A plurality of groups of conductive rods 7 are connected to the inner wall of the impeller 5, and the conductive rods 7 extend through the impeller 5, the conductive rods 7 comprise a reset spring 701 and a connecting slide rod 702, the conductive rods 7 are elastically connected through the reset spring 701 and the connecting slide rod 702, and the bottom end of the connecting slide rod 702 extends below the impeller 5, the top end of the conductive rod 7 is connected with a limiting head 703, the limiting head 703 is located above the upper sealing clamping groove 502, the bottom end of the connecting slide rod 702 is located in the lower sealing clamping groove 503, the two groups of iron sealing rings 8 are electrically connected through the conductive rods 7, which facilitates the electrical connection of the iron sealing rings 8, the inside of the impeller 5 is connected with a metal fixing plate 9 outside the output end of the output shaft 1051, the output shaft 1051 is fixedly connected with the impeller 5 through the metal fixing plate 9, the top end of the metal fixing plate 9 is connected with a connecting plate 901, and the connecting plate 901 is attached to the bottom end of the output shaft 1051, the bottom end of the metal fixing plate 9 is connected with a locking bolt 10, and the metal fixing plate 9 is fixedly connected with the end of the output shaft 1051 through the locking bolt 10, which can conveniently fix the impeller and the output shaft 1051.

[0047] Please refer to Figure 3The inside of the impeller 5 is provided with an anode sheet 6, the material of the anode sheet 6 is composed of aluminum material, the activity of the material of the anode sheet 6 is higher than the material activity of the impeller 5 and the iron sealing ring 8, the impeller 5 and the iron sealing ring 8 are connected with the anode sheet 6, the anode sheet 6 is preferentially oxidized and dissolved in seawater, and the electron flow is released to the impeller 5 and the iron sealing ring 8, so that the impeller 5 and the iron sealing ring 8 are always in a cathode state, and corrosion of the impeller 5 and the iron sealing ring 8 is avoided, the anode sheet 6 is located in the inside of the water inlet 101, and the anode sheet 6 is a fan type, the back surface of the anode sheet 6 is connected with a scraper 601, the scraper 601 is attached to the inner wall of the water inlet 101, the top end of the scraper 601 is connected with a ring-shaped clamping conductive ring 602, the clamping conductive ring 602 is fixedly connected with the bottom end of the impeller 5, the outer wall of the metal fixing sheet 9 is attached to the inner wall blade of the impeller 5, in the use process, the impeller 5 drives the anode sheet 6 to rotate, so as to drive the scraper 601 to clean the position of the water inlet 101, and in the rotating process, the anode sheet 6 itself can drive seawater to flow upwards, improve the water inlet effect, and when the anode sheet 6 rotates, the seawater outside the anode sheet 6 can be changed, the ion flow efficiency is improved, and the oxidation speed is improved.

[0048] In the above embodiment, please refer to Figure 7 The positioning ring 2 is a long barrel type, and the end of the positioning ring 2 is connected with a bent sealing sleeve, the positioning ring 2 is fixedly connected with the inner wall of the lower sealing ring 3 through the sealing sleeve, the inner wall of the positioning ring 2 is provided with a side sealing groove 201, and a rubber sealing ring is installed in the side sealing groove 201, which is used for limiting and sealing the connection position of the output shaft 1051 and the positioning ring 2.

[0049] Second embodiment:

[0050] Please refer to Figures 10 to 11 , the difference between the second embodiment of the application is that the structure and installation position of the anode sheet 6 are different, specifically, the anode sheet 6 is a circular ring type, and the shape of the anode sheet 6 matches the shape between the upper fixed ring and the blade, a plurality of positioning clamping blocks 603 are arranged on the inner wall of the anode sheet 6, a plurality of positioning clamping grooves 902 are arranged on the outer wall of the metal fixing sheet 9, the positioning clamping blocks 603 are clamped and connected with the metal fixing sheet 9 through the positioning clamping grooves 902, and the positioning clamping grooves 902 are aligned with the outer side of the lower iron sealing ring 8, the anode sheet 6 surrounds the outer wall of the metal fixing sheet 9, which can facilitate the anode sheet 6, and reduce the seawater flow outside the anode sheet 6, reduce the water erosion of the anode sheet 6, and improve the service life of the anode sheet 6.

[0051] During installation, first, the motor 105 is inserted with the fixed plate 104, then the positioning ring 2 is inserted through the inside of the lower sealing ring 3, then the upper sealing ring 4 is installed above the top end of the positioning ring 2 to fix the positioning ring 2, then the motor 105 and the fixed plate 104 are placed above the supporting shell 103, the output shaft 1051 of the motor 105 is inserted through the inside of the positioning ring 2, then the impeller 5 is clamped below the lower sealing ring 3 and is limited by the sealing ring 501, and the impeller 5 is sleeved on the outside of the output shaft 1051, at this time, the impeller 5 pushes the upper iron sealing ring 8 to adhere to the bottom end of the positioning ring 2, and the inside of the positioning ring 2 is double-sealed by cooperating with the sealing ring 501, so that the sealing effect is improved, then the impeller 5 is fixed on the output shaft 1051 by the metal fixing sheet 9, then the seawater pump shell 1 is connected with the supporting shell 103, the impeller 5 is synchronously inserted into the inside of the seawater pump shell 1, the impeller 5 is aligned with the water inlet 101, then the anode sheet 6 is installed at a suitable position and is positioned by the fixing mechanism, the anode sheet 6 is connected with the impeller 5 and the iron sealing ring 8, then the fixed plate 104, the supporting shell and the seawater pump shell 1 are fixed together by bolts, so that the seawater pump is assembled.

[0052] During use, the motor 105 is started, the motor 105 drives the impeller 5 to rotate through the output shaft 1051, the impeller 5 sucks the external water flow into the seawater pump shell 1 from the water inlet 101 and discharges the water flow through the water outlet 102, when the water flow is conducted, the anode sheet 6 is connected with the impeller 5 and the upper and lower iron sealing rings 8 to form an electrochemical reaction, the anode sheet 6 is corroded, so that the service life of the impeller 5 and the iron sealing ring 8 is ensured.

[0053] Although the embodiments of the present application have been shown and described, the specific embodiments are merely illustrative of the present application, and are not intended to limit the application, and the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner, and those skilled in the art can make modifications, replacements and variations of the embodiments without creative contribution after reading the specification, as long as they are within the scope of the claims of the present application.

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) and an upper sealing ring (4) are installed inside it. 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). The output shaft (1051) extends into the seawater pump casing (105). Inside the water pump casing (1), an impeller (5) is installed inside the seawater pump casing (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 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). The top of the impeller (5) is provided with an upper sealing groove (502) and the bottom of the impeller (5) is provided with a lower sealing groove (503). 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). 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). 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).

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 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).

4. The self-protected integrated seawater pump with a 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 positioning blocks (603) are provided on the inner wall of the anode plate (6), and multiple sets of positioning slots (902) are provided on the outer wall of the metal fixing plate (9). The positioning blocks (603) 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) surrounds the outer wall of the metal fixing plate (9).

5. 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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