CN112943675B

CN112943675B - Submersible electric pump

Info

Publication number: CN112943675B
Application number: CN202110408235.4A
Authority: CN
Inventors: 孙亨法
Original assignee: Zhejiang Meideheng Pump Co ltd
Current assignee: Meide Heng Technology Zhejiang Co ltd
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2022-11-29
Anticipated expiration: 2041-04-16
Also published as: CN112943675A

Abstract

The application relates to a submersible electric pump, which comprises a base, a motor and a pump body which are sequentially arranged from bottom to top. The lower end of the pump shell is also provided with an air chamber, when the submersible electric pump is submerged, air is filled in the air chamber, and then buoyancy is generated, so that the pump body of the submersible electric pump has a floating trend, and the inclination angle of the submersible electric pump in water is controlled.

Description

Submersible electric pump

Technical Field

The application relates to the field of water pumps, in particular to a submersible electric pump.

Background

The submersible electric pump is a water pump with a pump body impeller and a motor driving the impeller both submerged in water to work, and is suitable for pumping normal-temperature clean water, such as farmland drainage and irrigation, garden sprinkling irrigation, underground water lifting and the like.

Generally, a submersible electric pump includes a base, a motor, and a pump body. The motor and the pump body are connected to the base, and an output shaft of the motor extends into the pump body to drive an impeller in the pump body to rotate; the water inlet of the pump body is also covered with a filter screen to filter sundries such as aquatic weeds and the like in the water.

When the submersible electric pump works, the submersible electric pump is submerged, the base is abutted to the bottom of a well, a river bottom or a lake bottom, and the motor runs to drive the impeller to rotate so as to finish pumping water.

In view of the above-mentioned related art, the inventor believes that, in general, the river bottom or the lake bottom is inclined downward from the bank to the center, and when the submersible electric pump is submerged and abuts against the river bottom or the lake bottom, the base is inclined, which may cause the submersible electric pump to topple over, and affect the normal operation of the submersible electric pump.

Disclosure of Invention

In order to guarantee the normal work of submerged motor pump, this application provides a submerged motor pump.

The application provides a submerged motor pump adopts following technical scheme:

a submersible electric pump comprises a base, a pump body and a motor; the submersible electric pump comprises a pump body, a motor, an air chamber and a base, wherein the pump body and the motor are arranged on the base, an output shaft of the motor extends into the pump body to drive the pump body to operate, the air chamber is connected to the base and filled with air, and when the base is horizontal, the air chamber is positioned above the center of mass of the submersible electric pump;

when the submersible electric pump is submerged, the buoyancy force borne by the air chamber is not more than the gravity of the submersible electric pump.

Through adopting above-mentioned technical scheme, when submerging, utilize the buoyancy that air chamber increase submerged motor pump barycenter top received for submerged motor pump's upper end has the trend of come-up, and the upper end of submerged motor pump is located the top of submerged motor pump barycenter promptly, with the inclination of control submerged motor pump in aqueous, and then avoids submerged motor pump to empty, with the normal work of guaranteeing submerged motor pump.

Optionally, when submerged, the buoyancy force applied to the air chamber is less than the gravity of the submersible electric pump.

By adopting the technical scheme, the submersible electric pump is prevented from suspending in water, and when the submersible electric pump is placed in water, the submersible electric pump has the tendency of submerging, so that the submersible electric pump is submerged to work normally.

Optionally, the air chamber includes a housing, and one end of the housing facing the base is communicated with the outside;

the submersible electric pump further comprises:

the detection module is arranged in the shell and used for detecting the water level in the shell, and when the water level is higher than a preset value, a detection signal is output;

the control module is coupled with the detection module, receives the detection signal and outputs a control signal; and

and the protection module is coupled with the control module and responds to a control signal to close the motor.

By adopting the technical scheme, when the submersible electric pump is inclined in water, part of water enters the shell from one end of the shell facing the base, and the larger the inclination angle of the submersible electric pump is (the included angle between the base and the horizontal plane), the more the water in the shell is; namely, when the inclination angle of the submersible electric pump exceeds the allowable value, the water level is higher than the preset value;

through the water level in the detection module real-time detection casing, when the inclination of submerged motor pump exceeded the allowable value, the water level was higher than the default, and then made the motor stall, and submerged motor pump stop work promptly avoids the damage of submerged motor pump.

Optionally, a sliding part is further arranged in the housing, and when the base is horizontal, the sliding part is connected with the housing in a sliding manner along the horizontal direction;

the detection module is connected with the sliding piece.

By adopting the technical scheme, when the submersible electric pump inclines in water, the inclination direction of the submersible electric pump is uncontrollable, when the submersible electric pump inclines in water, part of water enters the shell, the water level in the shell rises, the sliding direction of the sliding piece inclines along with the water level, the sliding piece and the detection module slide downwards under the action of gravity, and the detection module is close to the water surface in the shell; when the submersible electric pump inclines to any direction, the distance between the detection module and the water surface in the shell is kept minimum so as to detect the water level in the shell.

Optionally, the sliding part is annular, and the sliding part is rotationally connected with the shell around the axis of the sliding part; when the base is horizontal, the axis of the sliding piece is vertical.

Through adopting above-mentioned technical scheme, detection module connects on the sliding part, then the axis of the holistic barycenter of detection module and sliding part skew sliding part, and when submerged motor pump inclined, the holistic barycenter of detection module and sliding part rotated under the action of gravity to make detection module be close to the surface of water in the casing.

Optionally, the air chamber further comprises a partition plate, the partition plate covers the lower end of the shell, and through holes are formed in the partition plate at intervals.

Through adopting above-mentioned technical scheme, reduce the intercommunication area in the casing inside outside through the through-hole for the surface of water in the casing keeps steadily.

Optionally, the motor includes a casing, a stator and a rotor, and the lower end of the casing is connected to the upper end of the base;

the pump body comprises a pump shell and an impeller, the pump shell is connected to the upper end of the machine shell, the lower end of the pump shell is provided with an inlet, and the inlet is used for the output shaft of the power supply machine to extend into;

the air chamber is connected to the pump housing.

Through adopting above-mentioned technical scheme, the quality of motor is great, and the quality of the pump body is less, reduces submerged motor pump's barycenter height.

Optionally, there is a gap between the inner periphery of the inlet and the output shaft of the motor, the gap being used for water to pass through;

the pump body further comprises a filter cylinder, the upper end of the filter cylinder is connected to the lower end of the pump shell, the lower end of the filter cylinder is connected to the upper end of the machine shell, and filter holes are formed in the side wall of the filter cylinder at intervals;

the inlet is located within the filter cartridge; the air chamber is located within the filter cartridge.

By adopting the technical scheme, the filter drum can block sundries such as weeds in water, the sundries are prevented from approaching the air chamber, and the sundries are prevented from entering the pump body, so that the normal work of the air chamber and the pump body is facilitated.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the submersible electric pump works, the submersible electric pump is submerged, air is reserved in the air chamber, and then buoyancy is generated, so that a pump body of the submersible electric pump has a floating trend to control the inclination angle of the submersible electric pump in water;

2. when the submersible electric pump is inclined in water, part of water enters the air chamber, and the larger the inclination angle of the submersible electric pump is (the included angle between the base and the horizontal plane), the more water is in the air chamber; the protection device is arranged in the air chamber and used for detecting the water level in the air chamber and turning off the motor when the water level is higher than a preset value.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a structural sectional view of the pump body.

Fig. 3 is a schematic structural view of the pump body.

Fig. 4 is a schematic diagram of the protection device.

Description of the reference numerals: 1. a base; 2. a motor; 21. a housing; 3. a pump body; 31. a filter cartridge; 311. filtering holes; 32. a pump housing; 321. an inlet; 322. an outlet; 33. an impeller; 34. an air chamber; 341. a housing; 3411. an inner ring; 3412. an outer ring; 342. a partition plate; 3421. a through hole; 4. a protection device; 41. a sliding member; 42. a detection module; 43. a control module; 44. and a protection module.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

Referring to fig. 1, the embodiment of the present application discloses a submersible electric pump, which includes a base 1, a motor 2 and a pump body 3 that are arranged from bottom to top in sequence.

The lower end surface of the base 1 is horizontally arranged. The motor 2 includes a housing 21, a stator, and a rotor; the lower extreme of casing 21 is connected in the upper end of base 1, and stator and rotor are all installed in casing 21, and the vertical setting of axis of rotor, and the output shaft and the coaxial setting of rotor of motor 2, and the output shaft of motor 2 upwards stretches out casing 21.

Pump body 3 includes filter cartridge 31, pump casing 32, and impeller 33; the filter cylinder 31 is cylindrical and is coaxially sleeved on the periphery of the output shaft of the motor 2, and the lower end of the filter cylinder 31 is connected with the upper end of the machine shell 21; meanwhile, the side wall of the filter cartridge 31 is provided with filter holes 311 at intervals; the pump casing 32 is connected to the upper end of the filter cartridge 31; the impeller 33 is mounted in the pump casing 32.

Referring to fig. 1 and 2, the lower end of the pump casing 32 is further provided with an inlet 321, the output shaft of the motor 2 extends into the pump casing 32 from the inlet 321, and the impeller 33 is coaxially connected with the output shaft of the motor 2; meanwhile, there is a space between the inner circumference of the inlet 321 and the outer circumference of the output shaft of the motor 2, the space being used for water to enter the pump case 32; the upper end of the pump case 32 is provided with an outlet 322 for outputting water having a certain pressure.

Referring to fig. 2 and 3, the lower end of the pump housing 32 is also provided with an air chamber 34. The air chamber 34 includes a housing 341 and a partition 342, the housing 341 is integrally formed with the pump casing 32, and the housing 341 surrounds the inlet 321. Housing 341 includes an inner ring 3411 and an outer ring 3412; the inner circumference of the inner ring 3411 is the inlet 321 of the pump housing 32, and the outer diameter of the inner ring 3411 increases as it is farther from the motor 2, the inner circumference of the outer ring 3412 is connected to the upper end of the outer circumference of the inner ring 3411, and the lower end of the outer ring 3412 is connected to the upper end of the filter cartridge 31; the partition 342 is annular, the outer periphery of the partition 342 is connected with the lower end of the inner periphery of the outer ring 3412, the inner periphery of the partition 342 is connected with the lower end of the outer periphery of the inner ring 3411, and an annular cavity is formed among the inner ring 3411, the outer ring 3412 and the partition 342; meanwhile, the partition 342 is provided with through holes 3421 at intervals so that the cavity is communicated with the outside.

The during operation, the in-process that submerged pump put into aquatic, motor 2 is located the below all the time, until submerged pump submergence in aquatic, remains the air in the air chamber 34 this moment, and then the buoyancy of production, and this buoyancy is less than submerged pump's gravity, and submerged pump continues dive, and the in-process of diving, the buoyancy of air chamber 34 department makes the pump body 3 be located the top, and then makes base 1 contact river bed or lake bottom earlier.

If the river bottom or the lake bottom inclines, the submersible electric pump inclines, at the moment, the buoyancy of the air chamber 34 and the gravity of the submersible electric pump are matched with each other to generate moment, so that the submersible electric pump is prevented from toppling, the inclination angle of the submersible electric pump is further controlled, namely, the inlet 321 and the river bottom or the lake bottom are controlled to keep a reasonable distance, and the pump body 3 is prevented from sucking a large amount of silt.

Referring to fig. 2 and 4, the submersible electric pump further comprises a protection device 4, and when the inclination angle of the submersible electric pump exceeds the allowable value, the protection device 4 stops the operation of the motor 2.

The protection device 4 comprises a sliding piece 41, a detection module 42, a control module 43 and a protection module 44; the sliding piece 41 is annular and is connected with the shell 341 around the axis thereof in a rotating way, and the axis of the sliding piece 41 is superposed with the axis of the output shaft of the motor 2; the detection module 42 is arranged on the sliding member 41, and the center of mass of the sliding member 41 and the detection module 42 is located on one side of the axis of the sliding member 41 facing the detection module 42; meanwhile, there is a space between the detection module 42 and the partition 342.

When the submersible electric pump is inclined, part of water enters the shell 341 through the through hole 3421 on the partition 342, the water level in the shell 341 rises, meanwhile, the sliding member 41 rotates and the mass center of the sliding member 41 and the detection module 42 integrally moves downwards, and then the detection module 42 approaches the water surface in the shell 341; the larger the inclination angle of the submersible electric pump is, the smaller the distance between the detection module 42 and the water surface in the housing 341 is; meanwhile, if the inclination angle of the submersible electric pump is too large, the detection module 42 is immersed in water.

If the detection module 42 is immersed in water, the detection module 42 outputs a detection signal; the control module 43 is coupled to the detection module 42, and receives the detection signal and outputs a control signal; the protection module 44 is coupled to the control module 43 and is responsive to the control signal to shut down the motor 2.

The inclination angle of the submersible electric pump is too large, the distance between the inlet 321 and the sediment at the river bottom is small, at the moment, the motor 2 is turned off, and the pump body 3 stops running to avoid sucking a large amount of sediment into the pump body 3.

In this example, the detection module 42 may employ a photoelectric liquid level sensor, and the photoelectric liquid level sensor sends out a detection signal when the photoelectric liquid level sensor is immersed in water. Meanwhile, the protection module 44 may be configured to turn off the motor 2 by cutting off the power supply of the motor 2, and if the protection module 44 is configured to employ a relay, the relay has a coil and a switch, wherein the coil of the relay is coupled to the control module 43, and responds to the control signal to turn off the switch of the relay, the switch of the relay is coupled to the power supply circuit of the motor 2, and after the switch of the relay is turned off, the power supply of the motor 2 is cut off.

Meanwhile, in this example, the sliding member 41 may be rotatably connected between the inner ring 3411 by a ball bearing, an inner ring of the ball bearing may be fixedly connected to the outer circumference of the inner ring 3411 by bonding, welding, or the like, and an outer ring of the ball bearing may be fixedly connected to the sliding member 41 by an interference fit.

The implementation principle of the submersible electric pump in the embodiment of the application is as follows: when the submersible electric pump works, the submersible electric pump is submerged, air is reserved in the air chamber 34, and further buoyancy is generated, so that the pump body 3 of the submersible electric pump has a floating tendency, and the inclination angle of the submersible electric pump in water is controlled;

if the inclination angle of the submersible electric pump in water is too large, the distance between the inlet 321 and the sediment at the river bottom is small, at this time, part of water enters the casing 341 through the through hole 3421 on the partition 342, and the water level in the casing 341 rises to contact and submerge the detection module 42, the protection module 44 cuts off the power supply to the motor 2, the pump body 3 stops running, and a large amount of sediment is prevented from being sucked into the pump body 3.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A submersible electric pump comprises a base (1), a pump body (3) and a motor (2); the pump body (3) and the motor (2) are both installed on the base (1), and the output shaft of the motor (2) extends into the pump body (3) to drive the pump body (3) to operate, which is characterized in that: the submersible electric pump is characterized by further comprising an air chamber (34), wherein the air chamber (34) is connected to the base (1), air is filled in the air chamber (34), and when the base (1) is horizontal, the air chamber (34) is located above the center of mass of the submersible electric pump;

when submerged, the buoyancy force borne by the air chamber (34) is not more than the gravity of the submersible electric pump;

the air chamber (34) comprises a shell (341), and one end, facing the base (1), of the shell (341) is communicated with the outside;

the submersible electric pump further comprises:

the detection module (42) is arranged in the shell (341) and is used for detecting the water level in the shell (341), and when the water level is higher than a preset value, a detection signal is output;

a control module (43), coupled to the detection module (42), for receiving the detection signal and outputting a control signal; and

a protection module (44), coupled to the control module (43), for switching off the electric machine (2) in response to a control signal;

a sliding piece (41) is further arranged in the shell (341), and when the base (1) is horizontal, the sliding piece (41) is connected with the shell (341) in a sliding manner along the horizontal direction;

the detection module (42) is connected with the sliding piece (41).

2. The submersible electric pump according to claim 1, characterized in that: when submerged, the buoyancy force applied to the air chamber (34) is less than the gravity force of the submersible electric pump.

3. The submersible electric pump according to claim 1, characterized in that: the sliding piece (41) is annular, and the sliding piece (41) is rotatably connected with the shell (341) around the axis of the sliding piece; when the base (1) is horizontal, the axis of the sliding piece (41) is vertical.

4. The submersible electric pump according to claim 1, characterized in that: the air chamber (34) further comprises a partition plate (342), the partition plate (342) covers the lower end of the shell (341), and through holes (3421) are formed in the partition plate (342) at intervals.

5. The submersible electric pump according to claim 1, characterized in that: the motor (2) comprises a machine shell (21), a stator and a rotor, wherein the lower end of the machine shell (21) is connected to the upper end of the base (1);

the pump body (3) comprises a pump shell (32) and an impeller (33), the pump shell (32) is connected to the upper end of the machine shell (21), an inlet (321) is formed in the lower end of the pump shell (32), and the inlet (321) is used for the output shaft of the power supply machine (2) to extend into;

the air chamber (34) is connected to the pump housing (32).

6. The submersible electric pump according to claim 5, characterized in that: a space exists between the inner periphery of the inlet (321) and the output shaft of the motor (2), and the space is used for water to pass through;

the pump body (3) further comprises a filter cylinder (31), the upper end of the filter cylinder (31) is connected to the lower end of the pump shell (32), the lower end of the filter cylinder (31) is connected to the upper end of the machine shell (21), and filter holes (311) are formed in the side wall of the filter cylinder (31) at intervals;

the inlet (321) is located within the filter cartridge (31); the air chamber (34) is located within the filter cartridge (31).