Submersible electric pump capable of being used on land

Abstract

The invention relates to a submersible electric pump capable of being used on land, and relates to the technical field of submersible electric pumps, according to the submersible electric pump, one end of a device shell is fixedly connected with a first connecting end cover, a first through hole is formed in the first connecting end cover in a penetrating mode, the other end of the device shell is fixedly provided with a second connecting end cover, and a second through hole is formed in the second connecting end cover in a penetrating mode; the motor is arranged in the device shell, the first connecting end cover and the second connecting end cover are both fixedly connected with the motor fixing end, the motor output shaft is arranged on the first connecting end cover in a penetrating mode, the cooling cavity is defined by the motor fixing end, the inner wall of the device shell, the first connecting end cover and the second connecting end cover, and the rotating shaft and the motor output shaft are coaxial and fixedly connected. The water suction pump body is installed on the rotating shaft and can suck water into the cooling cavity. The submersible electric pump has the effect of improving the heat dissipation efficiency when the submersible electric pump is used.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of submersible electric pumps, in particular to a submersible electric pump capable of being used on land. BACKGROUND

[0002] A submersible electric pump is a device integrating an electric motor and a water pump and working under water, which is widely used in deep well water lifting, farmland irrigation, mine drainage, urban water supply and drainage, fire fighting and other fields. The submersible electric pump is usually composed of a pump body, a motor and an impeller and a guide shell located inside the pump body, and the water lifting operation is realized by driving the impeller to rotate through the motor.

[0003] At present, the submersible electric pump needs to be submerged in water when it is running. The heat generated by the submersible electric pump when it is running is mainly reduced through the water around the submersible electric pump, so that the submersible electric pump can continue to run and avoid overheat. When the submersible electric pump is used on land, it can only rely on air flow to dissipate heat, and the heat dissipation effect is greatly reduced, the working temperature of the submersible electric pump rises sharply, and the service life of the submersible electric pump is reduced. Therefore, the existing submersible electric pump can only be submerged in water for operation and does not have good performance required for working on land. The submersible electric pump capable of being used on land needs to pass the pumped water into the pump body during the water pumping process to absorb the heat generated by the submersible electric pump during operation, so as to achieve the effect of heat dissipation. The water needs to be filtered through the filter screen before being pumped into the pump body, so as to avoid the existence of impurities in the water to affect the internal structure of the pump body. At the same time, the filtered impurities will adhere to the filter screen, and the impurities will gradually accumulate on the filter screen and block the filter screen mesh, so that the water flow cannot normally pass through the filter screen and enter the pump body, affecting the water pumping capacity of the pump body. When the water pumping capacity is reduced, there is not enough volume of water entering the pump body for heat dissipation, which will cause the heat in the pump body to rise and the submersible electric pump to overheat, affecting the service life of the submersible electric pump. SUMMARY

[0004] In order to improve the heat dissipation efficiency of the submersible electric pump during use, the present application provides a submersible electric pump capable of being used on land.

[0005] The submersible electric pump capable of being used on land provided by the present application adopts the following technical scheme: A submersible electric pump capable of being used on land, comprising: A device housing, a first connecting end cover is fixedly connected to one end of the device housing, a first through hole is formed through the first connecting end cover, a water inlet port is fixedly connected to the end of the first connecting end cover away from the device housing, a second connecting end cover is fixedly installed at the other end of the device housing, and a second through hole is formed through the second connecting end cover; A motor is arranged in the device housing, the first connecting end cover and the second connecting end cover are fixedly connected with the motor fixed end, and the motor output shaft is arranged on the first connecting end cover. A cooling cavity is surrounded by the motor fixed end, the device housing inner wall, the first connecting end cover and the second connecting end cover. A rotating shaft is coaxially and fixedly connected with the motor output shaft. A water pump body is arranged on the rotating shaft, and the water pump body can draw water into the cooling cavity. A filter assembly comprises a filter pipe in communication with the water inlet port. Two filter housings are symmetrically and fixedly arranged on the filter pipe. Two fixed frames are fixedly connected, are slidingly arranged in the filter housings, are arranged in and slidingly arranged in the filter pipe, and a filter screen is fixedly arranged in the fixed frame.

[0006] Optionally, the filter assembly further comprises: A first telescopic rod is fixedly arranged in the filter housing. A fixed plate is slidingly arranged in the filter housing, is fixedly connected with the first telescopic rod, and is uniformly and fixedly provided with a plurality of thimbles on the side away from the first telescopic rod, the thimbles being capable of penetrating the filter holes of the filter screen.

[0007] Optionally, the filter assembly further comprises: A first pulley block is fixedly arranged in the filter housing. A second pulley block is slidingly arranged in the filter housing. A spring is fixedly connected with the second pulley block at one end and is fixedly connected with the filter housing inner wall at the other end. A pull rope is arranged on the first pulley block and the second pulley block, is fixedly connected with the fixed frame at one end, and is fixedly connected with the fixed plate at the other end.

[0008] Optionally, the filter assembly further comprises: A switching housing is fixedly arranged on the filter housing. A pressure shell is fixedly installed in the switching shell, two symmetrical communication pipes are communicated on the pressure shell, the first telescopic rod fixed end is communicated with the communication pipe, an electronic valve is installed on the communication pipe, and the pressure shell is filled with fluid medium; A pressure element is connected with the pressure shell, and the pressure element is used for inputting the fluid medium into the first telescopic rod fixed end.

[0009] Optionally, the pressure element comprises: A second telescopic rod, a second telescopic rod fixed end is fixedly installed in the switching shell, and the second telescopic rod movable end is arranged in the pressure shell; A pressure plate is slidably installed in the pressure shell, and the pressure plate is fixedly connected with the second telescopic rod movable end.

[0010] Optionally, the switching assembly further comprises: A flow sensor is fixedly installed in one end of the filter pipe close to the water inlet port; A controller, the electronic valve and the flow sensor are electrically connected with the controller.

[0011] Optionally, a bearing is fixedly installed in the water inlet port, and the rotating shaft is arranged in and fixedly installed in the bearing away from the motor.

[0012] Optionally, the number of water pump bodies is not less than one, and each water pump body comprises: A water pump shell, the water pump shell is sleeved on the rotating shaft, and the water pump shell abuts between the water inlet port and the first connecting end cover; An impeller, the impeller is fixedly sleeved on the rotating shaft, and the impeller is rotatably arranged in the water pump shell; A guide vane, the guide vane is fixedly sleeved in the water pump shell; A plurality of locking nuts are arranged between the water inlet port and the first connecting end cover, one end of the locking nut is threadedly connected with the first connecting end cover, and the other end of the locking nut abuts against the water inlet port.

[0013] As described above, the present application has at least one beneficial technical effect: 1. The water pump body is driven by the motor to work, water is pumped into the device shell through the water inlet port, and into the cooling cavity, the water in the cooling cavity radiates heat for the motor, and the heat is carried away through the flow of water, the motor is radiated in time, the temperature of the motor is in a normal working state, the working time and service life of the motor are prolonged; 2. The filter screen located in the filter pipe filters the water, avoids impurities entering the inside of the submersible electric pump that can be used on land, causes damage to the internal structure of the submersible electric pump that can be used on land, and prolongs the service life of the submersible electric pump that can be used on land; 3. The switching assembly monitors the water flow rate in the filter pipe in real time, controls the lengths of the two first telescopic rods in time, improves the response speed of the switching assembly and the filter assembly, completes the replacement and cleaning of the filter screen in time, keeps the water pumping capacity of the submersible electric pump that can be used on land stable, and ensures the stability of the water flow. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic diagram of the embodiment of the application; Figure 2 is a structural sectional view for showing the inside of the device housing; Figure 3 is a structural sectional view for showing the inside of the filter assembly; Figure 4 is a structural sectional view for showing the switching assembly.

[0015] REFERENCE SIGNS: 1, device housing; 11, first connecting end cover; 111, first through hole; 112, water inlet port; 113, bearing; 12, second connecting end cover; 121, second through hole; 13, motor; 14, cooling cavity; 15, rotating shaft; 2, water pump body; 21, water pump housing; 22, guide vane; 23, impeller; 24, locking nut; 3, filter assembly; 31, filter pipe; 32, filter housing; 33, fixed frame; 331, filter screen; 34, first telescopic rod; 35, fixed plate; 351, thimble; 36, first pulley block; 37, second pulley block; 38, spring; 39, pull rope; 4, switching assembly; 41, switching housing; 42, pressure applying housing; 43, communication pipe; 44, electronic valve; 45, second telescopic rod; 46, pressure applying plate; 47, flow sensor. DETAILED DESCRIPTION

[0016] The following will be described in detail in combination with the accompanying Figures 1-4 The application will be described in further detail.

[0017] The embodiment of the application discloses a submersible electric pump that can be used on land.

[0018] Reference Figure 1 and Figure 2 A submersible electric pump that can be used on land comprises a device housing 1, a motor 13, a rotating shaft 15, and a water pump body 2.

[0019] The device housing 1 is fixedly connected with a first connecting end cover 11 at one end, and the first connecting end cover 11 is fixedly connected with a water inlet port 112 at the end away from the device housing 1. A first through hole 111 is formed through the first connecting end cover 11. The other end of the device housing 1 is fixedly installed with a second connecting end cover 12 for connecting an outlet pipe. A second through hole 121 is formed through the second connecting end cover 12. A motor 13 is arranged in the device housing 1. The first connecting end cover 11 and the second connecting end cover 12 are fixedly connected with the fixed end of the motor 13. The output shaft of the motor 13 penetrates the first connecting end cover 11. The fixed end of the motor 13, the inner wall of the device housing 1, the first connecting end cover 11 and the second connecting end cover 12 jointly form a cooling cavity 14 in the shape of a circular column.

[0020] The rotating shaft 15 is coaxial with and fixedly connected with the output shaft of the motor 13. The water pump body 2 is installed on the rotating shaft 15. The water pump body 2 can draw water into the cooling cavity 14. The number of the water pump body 2 can be multiple. The rotating shaft 15 can be selectively replaced according to the number of the water pump body 2, so that the length of the rotating shaft 15 is adapted to the number of the water pump body 2. The water inlet port 112 is fixedly installed with a bearing 113. The end of the rotating shaft 15 away from the motor 13 penetrates and is fixedly installed in the bearing 113.

[0021] The land-use submersible electric pump is used by placing the water inlet port 112 in water, starting the motor 13, driving the water pump body 2 to work through the motor 13, and working the water pump body 2 to draw water into the device housing 1 through the water inlet port 112. The water in the device housing 1 enters the cooling cavity 14 through the first through hole 111 and is discharged through the second through hole 121. The water supply is realized through the pipeline connected to the second connecting end cover 12. During the water pumping process, the water in the cooling cavity 14 cools the motor 13 and carries away the heat through the flow of water, so that the motor 13 is cooled in time, the temperature of the motor 13 is in a normal working state, and the working time and service life of the motor 13 are prolonged.

[0022] Referring to Figure 1 and Figure 2 , the water pump body 2 includes an impeller 23, a water pump housing 21 and a guide vane 22.

[0023] The plurality of water pump housings 21 are sleeved on the rotating shaft 15 and tightly fit with the rotating shaft 15, and the plurality of water pump housings 21 abut between the water inlet port 112 and the first connecting end cover 11. The two ends of the water pump housings 21 respectively abut with the water inlet port 112 and the first connecting end cover 11. The impeller 23 is fixedly sleeved on the rotating shaft 15 and rotationally arranged in the water pump housing 21. The guide vane 22 is fixedly installed in the water pump housing 21. The guide vane 22 and the impeller 23 cooperate with the prior art, which will not be repeated here. The plurality of locking nuts 24 are threadedly connected at one end to the first connecting end cover 11 and at the other end to the water inlet port 112. The locking nuts 24 are used to tightly abut the plurality of water pump housings 21 so that the adjacent two water pump housings 21 tightly fit.

[0024] The motor 13 outputs and drives the impeller 23 to rotate, and the impeller 23 rotates and pumps water into the water pump housing 21. The guide vane 22 guides and drains the water flowing into the water pump housing 21. The number of water pump bodies 2 can be selectively replaced to ensure sufficient power to pump water, while avoiding excessive load on the motor 13 during operation, reducing the working temperature of the motor 13, and prolonging the service life of the motor 13.

[0025] Referring to Figure 1 and Figure 3 , the water inlet port 112 is provided with a filter assembly 3. The filter assembly 3 includes a filter pipe 31, a filter housing 32, a fixed frame 33, a first telescopic rod 34, a fixed plate 35, a first pulley set 36, a second pulley set 37, a spring 38, and a pull rope 39.

[0026] The filter pipe 31 is in communication with the water inlet port 112, and the cross section of the filter pipe 31 is rectangular. The filter housing 32 is provided with two, which are symmetrically and fixedly installed on the upper and lower ends of the filter pipe 31. The fixed frame 33 is provided with two, which are fixedly connected and slidably installed in the filter housing 32. The fixed frame 33 is slidably installed in the filter pipe 31, and the filter net 331 is fixedly installed in the fixed frame 33.

[0027] The fixed end of the first telescopic rod 34 is fixedly installed in the filter housing 32, and the first telescopic rod 34 is connected with the switching assembly 4. The switching assembly 4 can drive the first telescopic rod 34 to extend or retract. The fixed plate 35 is slidably installed in the filter housing 32, and the fixed plate 35 is fixedly connected with the movable end of the first telescopic rod 34. A plurality of thimbles 351 are uniformly and fixedly installed on the side of the fixed plate 35 away from the first telescopic rod 34, and the thimbles 351 can pass through the filter holes of the filter net 331.

[0028] The first pulley set 36 is fixedly installed in the filter housing 32, the second pulley set 37 is slidably installed in the filter housing 32, one end of the spring 38 is fixedly connected with the second pulley set 37, the other end of the spring 38 is fixedly connected with the inner wall of the filter housing 32, the pull rope 39 is wound on the first pulley set 36 and the second pulley set 37, one end of the pull rope 39 is fixedly connected with the fixed frame 33, and the other end of the pull rope 39 is fixedly connected with the fixed plate 35.

[0029] In the initial state, the first telescopic rod 34 is in the shortened state in the filter housing 32 at the upper end, the spring 38 is in the free length, the fixed frame 33 and the filter screen 331 are located in the filter pipe 31, and the water in the filter pipe 31 is filtered. In the filter housing 32 at the lower end, the first telescopic rod 34 and the spring 38 are in the elongated state, the fixed frame 33 and the filter screen 331 are located in the filter housing 32, the fixed plate 35 is close to the filter screen 331, and the thimble 351 is inserted into the filter hole of the filter screen 331.

[0030] The water is filtered by the filter screen 331 located in the filter pipe 31, so that impurities are prevented from entering the inside of the land-use submersible electric pump along with the water, the internal structure of the land-use submersible electric pump is prevented from being damaged, and the service life of the land-use submersible electric pump is prolonged.

[0031] After the land-use submersible electric pump works for a period of time, impurities are attached to the filter screen 331 located in the filter pipe 31, which affects the water inflow speed in the filter pipe 31. Then the driving switching assembly 4 is driven to work, the first telescopic rod 34 at the lower end is shortened first, and then the first telescopic rod 34 at the upper end is elongated.

[0032] When the first telescopic rod 34 at the lower end is shortened, the movable end of the first telescopic rod 34 drives the fixed plate 35 to move away from the filter screen 331, the spring 38 is shortened until it becomes a free length, and the thimble 351 is separated from the filter screen 331. Then the first telescopic rod 34 at the upper end is elongated, the movable end of the first telescopic rod 34 drives the fixed plate 35 to move close to the filter screen 331, the second pulley set 37 remains unchanged under the elastic force of the spring 38, the fixed plate 35 moves and pulls the fixed frame 33 and the filter screen 331 through the pull rope 39, so that the fixed frame 33 and the filter screen 331 located in the filter pipe 31 in the initial state enter the filter housing 32 at the upper end, and the fixed frame 33 and the filter screen 331 located in the filter housing 32 in the initial state enter the filter pipe 31, so as to filter the water in the filter pipe 31.

[0033] After the first telescopic rod 34 at the upper end continues to extend, the fixed plate 35 pulls the second pulley block 37 to move towards the first pulley block 36 through the pull rope 39, the spring 38 extends in length, the thimble 351 is inserted into the filter hole of the filter screen 331, and the impurities attached to the filter screen 331 fall off from the filter hole of the filter screen 331, so that the cleaning work of the filter screen 331 is realized.

[0034] By analogy, when the water inflow speed in the filter pipe 31 is affected again, the length of the two first telescopic rods 34 is switched by the switching assembly 4, so that the land-use submersible electric pump can replace and clean the filter screen 331 under the premise of always working, and the water pumping efficiency of the land-use submersible electric pump is improved. Avoiding too much impurities attached to the filter screen 331, the water inflow of the water pump body 2 is kept stable during a long time of use, and enough water can enter the cooling cavity 14 and cool the motor 13 during use of the land-use submersible electric pump.

[0035] Referring to Figure 3 and Figure 4 , the switching assembly 4 comprises a switching shell 41, a pressure applying shell 42, a pressure applying piece, a flow sensor 47 and a controller.

[0036] The switching shell 41 is fixedly installed on the filter shell 32, and the pressure applying shell 42 is fixedly installed in the switching shell 41. The pressure applying shell 42 is communicated with two symmetrical communication pipes 43, the fixed end of the first telescopic rod 34 is communicated with the communication pipes 43, and the electronic valves 44 are installed on the communication pipes 43. The pressure applying shell 42 is filled with fluid medium, and the fluid medium can be hydraulic oil.

[0037] The pressure applying piece is connected with the pressure applying shell 42, and is used for inputting or extracting the fluid medium into or from the fixed end of the first telescopic rod 34. The flow sensor 47 is fixedly installed in one end of the filter pipe 31 close to the water inlet port 112. The electronic valves 44 and the flow sensor 47 are electrically connected with the controller.

[0038] The pressure applying piece comprises a second telescopic rod 45 and a pressure applying plate 46. The fixed end of the second telescopic rod 45 is fixedly installed in the switching shell 41, the movable end of the second telescopic rod 45 is arranged in the pressure applying shell 42, the pressure applying plate 46 is slidably installed in the pressure applying shell 42 and tightly abuts against the inner wall of the pressure applying shell 42, and the pressure applying plate 46 is fixedly connected with the movable end of the second telescopic rod 45.

[0039] In the initial state, the two electronic valves 44 are in the closed state, the first telescopic rod 34 at the upper end is in the shortened state, and the first telescopic rod 34 at the lower end is in the extended state.

[0040] The flow sensor 47 detects the water flow in the filter pipe 31, and when the flow sensor 47 detects that the water flow in the filter pipe 31 is reduced to a preset value, the flow sensor 47 sends a signal to the controller, the controller controls the electronic valve 44 connected with the first telescopic rod 34 at the lower end to open, and controls the active end of the second telescopic rod 45 to shorten, the active end of the second telescopic rod 45 drives the pressing plate 46 to move towards the fixed end of the second telescopic rod 45, the fluid medium in the fixed end of the first telescopic rod 34 at the lower end is drawn into the pressing shell 42 through the communication pipe 43, the length of the first telescopic rod 34 at the lower end is shortened, and then the controller controls the electronic valve 44 connected with the first telescopic rod 34 at the lower end to close.

[0041] Then, the controller controls the electronic valve 44 connected with the first telescopic rod 34 at the upper end to open, and controls the active end of the second telescopic rod 45 to lengthen, the active end of the second telescopic rod 45 drives the pressing plate 46 to move away from the fixed end of the second telescopic rod 45, and the fluid medium in the pressing shell 42 is input into the fixed end of the first telescopic rod 34 at the upper end through the communication pipe 43, the length of the first telescopic rod 34 at the upper end is lengthened, and finally the controller controls the electronic valve 44 connected with the first telescopic rod 34 at the upper end to close.

[0042] The switching assembly 4 monitors the water flow speed in the filter pipe 31 in real time, and controls the lengths of the two first telescopic rods 34 in time, so that the response speed of the switching assembly 4 and the filtering assembly 3 is improved, the replacement and cleaning of the filter screen 331 are completed in time, the water pumping capacity of the submersible electric pump that can be used on land is kept stable, and the stability of the water flow is ensured.

[0043] The implementation principle of the submersible electric pump that can be used on land in the embodiment is as follows: when the submersible electric pump that can be used on land works, the water inlet port 112 is placed into water, the motor 13 is started, the motor 13 drives the water pump body 2 to work, the water pump body 2 works and pumps water into the device shell 1 through the water inlet port 112, the water entering the device shell 1 enters the cooling cavity 14 through the first through hole 111 and is discharged through the second through hole 121, and water supply is realized through the pipeline connected with the second connecting end cover 12. In the water pumping process, the water in the cooling cavity 14 cools the motor 13, and the heat is taken away through the flow of the water, so that the motor 13 is cooled in time, the temperature of the motor 13 is kept in a normal working state, and the working time and service life of the motor 13 are prolonged.

[0044] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made on the basis of the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A submersible electric pump which can be used on land, characterized in that, Include: Device shell (1), one end of the device shell (1) is fixedly connected with first connecting end cover (11), first connecting end cover (11) is provided with first through hole (111) through, the other end of first connecting end cover (11) is fixedly connected with water inlet port (112), the other end of device shell (1) is fixedly installed with second connecting end cover (12), second connecting end cover (12) is provided with second through hole (121) through; Motor (13), the motor (13) is arranged in the device shell (1), the first connecting end cover (11) and the second connecting end cover (12) are fixedly connected with the motor (13) fixed end, the output shaft of the motor (13) is arranged on the first connecting end cover (11); Cooling cavity (14), the cooling cavity (14) is surrounded by the motor (13) fixed end, the inner wall of the device shell (1), the first connecting end cover (11) and the second connecting end cover (12); Rotating shaft (15), the rotating shaft (15) is coaxial with the output shaft of the motor (13) and is fixedly connected; Water pump body (2), the water pump body (2) is installed on the rotating shaft (15), and the water pump body (2) can pump water into the cooling cavity (14); Filter assembly (3), the filter assembly (3) includes filter tube (31), the filter tube (31) is communicated with the water inlet port (112); Filter housing (32), the filter housing (32) is provided with two, two filter housings (32) are symmetrical and fixedly installed on the filter tube (31); Fixed frame (33), the fixed frame (33) is provided with two, two fixed frames (33) are fixedly connected, the fixed frame (33) is slidingly installed in the filter housing (32), the fixed frame (33) is arranged and slidingly installed in the filter tube (31), and the fixed frame (33) is fixedly installed with filter screen (331) in the fixed frame (33).

2. The submersible electric pump according to claim 1, wherein The filter assembly (3) further includes: First telescopic rod (34), the first telescopic rod (34) is fixedly installed in the fixed end of the filter housing (32); Fixed plate (35), the fixed plate (35) is slidingly installed in the filter housing (32), the fixed plate (35) is fixedly connected with the first telescopic rod (34) movable end, a plurality of thimbles (351) are uniformly and fixedly installed on the side away from the first telescopic rod (34) of the fixed plate (35), and the thimbles (351) can pass through the filter holes of the filter screen (331).

3. The submersible electric pump according to claim 2, wherein, The filter assembly (3) further includes: First pulley block (36), the first pulley block (36) is fixedly installed in the filter housing (32); Second pulley block (37), the second pulley block (37) is slidingly installed in the filter housing (32); Spring (38), one end of the spring (38) is fixedly connected with the second pulley block (37), and the other end of the spring (38) is fixedly connected with the inner wall of the filter housing (32); A pull rope (39) is arranged around the first pulley set (36) and the second pulley set (37), one end of the pull rope (39) is fixedly connected with the fixed frame (33), and the other end of the pull rope (39) is fixedly connected with the fixed plate (35).

4. The submersible electric pump according to claim 3, wherein, The switching assembly (4) further comprises: A switching housing (41) is fixedly installed on the filter housing (32); A pressure applying housing (42) is fixedly installed in the switching housing (41), two symmetrical communication pipes (43) are communicated on the pressure applying housing (42), the fixed end of the first telescopic rod (34) is communicated with the communication pipe (43), an electronic valve (44) is installed on the communication pipe (43), and the pressure applying housing (42) is filled with fluid medium; A pressure applying member is connected with the pressure applying housing (42), and the pressure applying member is used for inputting the fluid medium into the fixed end of the first telescopic rod (34).

5. A submersible electric pump for land use according to claim 4, characterized in that, The pressure applying member comprises: A second telescopic rod (45) is fixedly installed at the fixed end in the switching housing (41), and the movable end of the second telescopic rod (45) penetrates the pressure applying housing (42); A pressure applying plate (46) is slidably installed in the pressure applying housing (42), and the pressure applying plate (46) is fixedly connected with the movable end of the second telescopic rod (45).

6. A submersible electric pump for land use according to claim 5, characterized in that, The switching assembly (4) further comprises: A flow sensor (47) is fixedly installed at one end of the filter pipe (31) close to the water inlet port (112); The electronic valve (44) and the flow sensor (47) are electrically connected with the controller.

7. The submersible electric pump according to claim 1, wherein, A bearing (113) is fixedly installed in the water inlet port (112), and the end, away from the motor (13), of the rotating shaft (15) penetrates and is fixedly installed in the bearing (113).

8. The submersible electric pump according to claim 1, wherein, The number of the water pump bodies (2) is not less than one, and each water pump body (2) comprises: A water pump housing (21) is sleeved on the rotating shaft (15), and abuts between the water inlet port (112) and the first connecting end cover (11); A vane (23) is fixedly sleeved on the rotating shaft (15) and rotationally arranged in the water pump housing (21); A guide vane (22) is fixedly sleeved in the water pump housing (21); A plurality of locking nuts (24) are arranged between the water inlet port (112) and the first connecting end cover (11), one end of the locking nut (24) is threadedly connected with the first connecting end cover (11), and the other end of the locking nut (24) abuts against the water inlet port (112).

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