An electric motor pump

Abstract

The application relates to a motor pump applied in the field of lithium battery cleaning, which comprises a pump body, a liquid inlet pipeline and a liquid outlet pipeline arranged on the pump body, a transition pipeline communicated between the liquid inlet pipeline and the liquid outlet pipeline, a plunger slidingly connected in the transition pipeline, a driving device arranged on the pump body and used for driving the plunger to reciprocate along the transition pipeline, a connecting pipeline communicated with a liquid outlet end of the liquid outlet pipeline, a nozzle arranged at the liquid outlet end of the connecting pipeline, an overflow device arranged on the connecting pipeline and used for returning liquid in the connecting pipeline to the liquid inlet pipeline through the overflow device, and a linkage driving device closed when the liquid returns through the overflow device. When the spray gun is blocked and the driving device needs to be closed, the liquid in the connecting pipeline returns to the liquid inlet pipeline through the overflow device, and the linkage driving device is closed when the liquid overflows and returns, so that the possibility of damage of the whole pump body caused by the fact that the pressure in the pump body cannot be released is reduced, and the overall durability and reliability of the motor pump are improved.

Description

Technical Field

[0001] This application relates to the field of lithium battery cleaning machine technology, and in particular to a motor pump. Background Technology

[0002] An electric motor pump is a fluid transport device that integrates an electric motor and a pump body. It uses electrical energy to drive mechanical motion to transport liquids or gases and is widely used in the field of lithium battery cleaning machines.

[0003] In the relevant technology, during the use of the electric pump, the liquid in the pump body is sprayed directly out through the nozzle. If the outlet of the nozzle is blocked by foreign objects, that is, if the nozzle core is blocked by impurities and other things, resulting in the inability to spray water normally, the pressure in the entire pump body will rise sharply.

[0004] If the power to the motor pump is not cut off in time under the above circumstances, the pressure inside the pump body cannot be released, which will cause irreversible damage to the entire pump body parts. The motor may stall or the battery pack may malfunction, resulting in damage to the motor pump. Summary of the Invention

[0005] To address the problem in related technologies where motor pumps are easily damaged due to nozzle blockage and failure to promptly shut off power, this application provides a motor pump with the following technical solution: It includes a pump body, on which an inlet pipe and an outlet pipe are provided. A transition pipe connects the inlet and outlet pipes, and a plunger is slidably connected within the transition pipe. The pump body is equipped with a drive device for driving the plunger to reciprocate along the transition pipe. The outlet end of the outlet pipe is connected to a connecting pipe, and a nozzle is located at the outlet end of the connecting pipe. An overflow device is provided on the connecting pipe to return liquid in the connecting pipe to the inlet pipe; when liquid returns through the overflow device, the drive device is shut off.

[0006] In one specific implementation, the overflow device includes a housing disposed on a connecting pipeline. The housing has an overflow hole communicating with the connecting pipeline. An overflow groove is formed on the wall of the overflow hole. A valve core is slidably connected inside the overflow hole. A valve block matching the overflow groove is provided on the outer edge of the valve core. An elastic element is abutted between the valve block and the bottom of the overflow groove. A pressure relief hole is formed on the wall of the overflow groove. The liquid outlet end of the pressure relief hole is provided with a liquid transfer channel communicating with the liquid inlet pipeline. A micro switch connected to a driving device is provided on the housing. When the end of the valve core facing the micro switch contacts the micro switch, the driving device stops working.

[0007] In one specific implementation, a first sealing groove is provided on the wall of the overflow hole, and a first sealing ring matching the first sealing groove is provided in the first sealing groove, with the first sealing ring abutting between the valve core and the first sealing groove.

[0008] In one specific implementation, a second sealing groove is provided on the wall of the overflow groove, the second sealing groove is located between the pressure relief hole and the first sealing groove, and a second sealing ring matching the second sealing groove is provided in the second sealing groove.

[0009] In one specific implementation, an inclined groove communicating with the overflow channel is formed on the wall of the overflow hole.

[0010] In one specific implementation, the driving device includes a drive motor mounted on the pump body, an output shaft at the output end of the drive motor, a drive shaft at the end of the output shaft opposite to the drive motor, the axes of the drive shaft and the output shaft being misaligned, a drive groove being formed on the outer edge of the plunger, a drive bearing being rotatably connected in the drive groove, and the drive shaft being inserted into the inner edge of the drive bearing.

[0011] In one specific implementation, the output end of the drive motor is provided with a speed reducer, and the output shaft is located at the output end of the speed reducer.

[0012] In one specific implementation, a rolling bearing is provided between the pump body and the output shaft.

[0013] In one specific implementation scheme, a first check valve is provided between the inlet pipeline and the transition pipeline, and a second check valve is provided between the transition pipeline and the outlet pipeline.

[0014] In one specific implementation, a check valve is provided in the outlet pipeline, and the check valve is located between the second one-way valve and the connecting pipeline.

[0015] In summary, this application has the following beneficial technical effects: Liquid enters the pump body through the inlet pipe, the drive device is activated, and the plunger reciprocates along the transition pipe. During the movement of the plunger, liquid is drawn into the transition pipe, and the liquid flows from the transition pipe into the outlet pipe. During normal use, high-pressure liquid is sprayed from the nozzle, and the overflow device is in a sealed state. When the spray gun is blocked and the drive device needs to be turned off, the liquid in the connecting pipe flows back to the inlet pipe through the overflow device, and the drive device is turned off when the overflow flows back, realizing the function of shutting down the motor pump. This reduces the possibility of damage to the pump body parts caused by the inability to release pressure within the pump body, improves the overall durability and reliability of the motor pump, and extends the service life of the motor pump. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0017] Figure 2 This is a schematic diagram illustrating the structure of the liquid inlet pipeline in the embodiments of this application.

[0018] Figure 3 This is a structural schematic diagram illustrating the valve core in the embodiments of this application.

[0019] Figure 4 This is a schematic diagram illustrating the structure of the inclined groove in the embodiments of this application.

[0020] Figure 5 This is a schematic diagram illustrating the structure of the second sealing ring in an embodiment of this application.

[0021] Figure 6 This is a schematic diagram illustrating the structure of the plunger in the embodiments of this application.

[0022] Figure 7 This is a schematic diagram illustrating the structure of the check valve in the embodiments of this application.

[0023] Reference numerals: 1. Pump body; 2. Inlet pipe; 3. Outlet pipe; 4. Transition pipe; 5. Plunger; 6. Connecting pipe; 7. Nozzle; 8. Housing; 9. Overflow hole; 10. Overflow groove; 11. Valve core; 12. Valve block; 13. Elastic element; 14. Pressure relief hole; 15. Liquid transfer channel; 16. Micro switch; 17. First sealing groove; 18. First sealing ring; 19. Second sealing groove; 20. Second sealing ring; 21. Inclined groove; 22. Drive motor; 23. Drive shaft; 24. Drive groove; 25. Drive bearing; 26. Reducer; 27. Rolling bearing; 28. Check valve; 29. ​​Output shaft. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0025] This application discloses an electric motor pump.

[0026] Reference Figure 1 , Figure 2 and Figure 3The electric pump includes a pump body 1, on which an inlet pipe 2 and an outlet pipe 3 are provided. A transition pipe 4 connects the inlet pipe 2 and the outlet pipe 3. A plunger 5 is slidably connected in the transition pipe 4. The inlet pipe 2 and the outlet pipe 3 correspond to the two end faces of the plunger 5, respectively. A drive device is provided on the pump body 1 to drive the plunger 5 to reciprocate along the transition pipe 4. The outlet end of the outlet pipe 3 is connected to a connecting pipe 6. A nozzle 7 is provided at the outlet end of the connecting pipe 6. An overflow device is provided on the connecting pipe 6 to return the liquid in the connecting pipe 6 to the inlet pipe 2. When the liquid returns through the overflow device, the linkage drive device is turned off. The motor pump in this embodiment is a conventional motor pump in which the pipeline is manually controlled by a valve gun. The valve gun can be set between the nozzle 7 and the overflow device. When the operator opens the valve gun, the pipeline is opened and the motor pump can work normally, that is, the liquid is injected into the pump body 1 through the water inlet pipeline. When the nozzle 7 is blocked or the operator closes the valve gun of the motor pump, the water pressure between the pump body 1 and the valve gun rises sharply. If the pressure in the pump body 1 cannot be released, it will cause irreversible damage to the parts of the entire pump body 1.

[0027] Therefore, liquid enters pump body 1 through inlet pipe 2, starts the drive device, and drives plunger 5 to reciprocate along transition pipe 4. During the movement of plunger 5, liquid is drawn into transition pipe 4, and the liquid flows into outlet pipe from transition pipe 4. During normal use, high-pressure liquid is sprayed out from nozzle 7, at which time the overflow device is in a sealed state. When the spray gun is blocked and the drive device needs to be turned off, the liquid in connecting pipe 6 flows back to inlet pipe 2 through overflow device, and the drive device is turned off when the overflow flows back, realizing the function of shutting down the motor pump. This reduces the possibility of damage to the parts of the entire pump body 1 caused by the inability to release pressure inside the pump body 1, improves the overall durability and reliability of the motor pump, and extends the service life of the motor pump.

[0028] Reference Figure 1 , Figure 2 and Figure 3The overflow device includes a housing 8 mounted on a connecting pipe 6. An overflow hole 9 communicating with the connecting pipe 6 is provided on the housing 8. An overflow groove 10 is formed on the wall of the overflow hole 9. A valve core 11 is slidably connected inside the overflow hole 9. A valve block 12, matching the size of the overflow groove 10, is provided on the outer edge of the valve core 11. In this embodiment, a gap for liquid flow exists between the maximum outer diameter of the valve block 12 and the wall of the overflow groove 10. An elastic element 13 abuts against the bottom of the overflow groove 10. In this embodiment, the elastic element 13 is a compression spring, and the elastic compression force of the compression spring drives the valve block 12 on the valve core 11 to reset. The overflow tank 10 has a pressure relief hole 14 on its tank wall. The liquid outlet of the pressure relief hole 14 is provided with a liquid transfer channel 15 that communicates with the liquid inlet pipe 2. The housing 8 is provided with a micro switch 16 connected to the drive device. When the valve core 11 contacts the micro switch 16 at one end, the drive device stops working.

[0029] Reference Figure 1 and Figure 3 An inclined groove 21 communicating with the overflow channel 10 is formed on the wall of the overflow hole 9. The open end of the inclined groove 21 faces the valve core 11. The inclined groove 21 increases the liquid flow rate of the overflow hole 9 and improves the flow efficiency of the liquid through the overflow hole 9. A first sealing groove 17 is formed on the wall of the overflow hole 9. A first sealing ring 18 matching the size of the first sealing groove 17 is placed in the first sealing groove 17. The first sealing ring 18 abuts against the valve core 11 and the first sealing groove 17. A second sealing groove 19 is formed on the wall of the overflow channel 10. The second sealing groove 19 is located between the pressure relief hole 14 and the first sealing groove 17. A second sealing ring 20 matching the size of the second sealing groove 19 is placed in the second sealing groove 19. The first sealing ring 18 and the second sealing ring 20 play a sealing role, reducing the possibility of liquid backflow or overflow and improving the stability of the motor pump during normal operation.

[0030] Therefore, refer to Figure 3 When the electric pump is in normal operation, high-pressure liquid is ejected from the nozzle 7 through the connecting pipe 6. At this time, the overflow device is in a sealed state, that is, the end of the valve core 11 facing the connecting pipe 6 is pressed against the first sealing ring 18. When the nozzle 7 becomes blocked or the operator closes the valve of the electric pump, the pressure in the connecting pipe 6 and the outlet pipe rises sharply, as shown in the figure. Figure 4High-pressure liquid flows through overflow hole 9 and inclined groove 21, simultaneously exerting a force on valve core 11 during its flow, pushing open valve core 11 and causing valve block 12 to press against elastic element 13. Valve core 11 retracts approximately 2.5 mm. When valve core 11 moves to contact the drive valve of micro switch 16, micro switch 16 is triggered to disconnect the circuit of the drive device, and the drive device stops working. At the same time, there is a gap between valve block 12 and the wall of overflow groove 10 for liquid to pass through. After passing through overflow hole 9, inclined groove 21, and overflow groove 10 in sequence, the liquid enters the liquid transfer channel 15 through pressure relief hole 14 to relieve pressure on connecting pipe 6 and outlet pipe. Since liquid transfer channel 15 is connected to inlet channel, the liquid flows back to inlet channel. Due to the release of pressure in connecting pipe 6 and outlet pipe, valve core 11 returns approximately 0.5 mm. Figure 5 At this time, the valve block 12 is pressed against the second sealing ring 20, and the pressure in the connecting pipe 6 is about 2.0 MPa. The connecting pipe 6 is in a pressure-holding state. The valve core 11 is balanced and stationary under the pressure of the connecting pipe 6. At this time, the end of the valve core 11 facing the micro switch 16 is not in contact with the drive valve of the micro switch 16, and the drive device is in a closed state.

[0031] Reference Figure 6 and Figure 7 The drive device includes a drive motor 22 mounted on the pump body 1. The output end of the drive motor 22 is equipped with a reducer 26. The output end of the reducer 26 is equipped with an output shaft 29. The end of the output shaft 29 facing away from the drive motor 22 is fixedly connected to a drive shaft 23. The axes of the drive shaft 23 and the output shaft 29 are misaligned, that is, the drive shaft 23 and the output shaft 29 are misaligned. The outer edge of the plunger 5 is provided with a drive groove 24. The drive shaft 23 is rotatably connected in the drive groove 24. The drive shaft 23 is inserted into the inner edge of the drive shaft 23 bearing.

[0032] Therefore, starting the drive motor 22 drives the reducer 26 at the output end of the drive motor 22 to start, which in turn drives the output shaft 29 at the output end of the reducer 26 to rotate. Since the axes of the output shaft 29 and the drive shaft 23 are misaligned, the drive shaft 23 drives the plunger 5 to reciprocate along the transition pipe 4 as the output shaft 29 rotates. During the movement, the plunger 5 draws liquid into the transition pipe 4, and the liquid flows from the transition pipe 4 into the outlet pipe.

[0033] Reference Figure 6 and Figure 7A rolling bearing 27 is installed between the pump body 1 and the output shaft 29. The rolling bearing 27 provides support to the output shaft 29 while reducing friction between the pump body 1 and the output shaft 29. A first check valve is installed between the inlet pipe 2 and the transition pipe 4, and a second check valve is installed between the transition pipe 4 and the outlet pipe 3. The first and second check valves allow for unidirectional liquid flow, thus controlling the direction of liquid flow. A check valve 28 is installed inside the outlet pipe, located between the second check valve and the connecting pipe 6. The check valve 28 effectively prevents high-pressure liquid from flowing back into the pump body 1, reducing the possibility of damage to internal parts, especially rubber components.

[0034] Therefore, when the plunger 5 moves toward the outlet pipe, the liquid is injected through the inlet pipe 2 into the spring that opens the first check valve. At this time, the second check valve in the outlet pipe is closed, and the inlet pipe 2 is filled with water. When the plunger 5 moves toward the inlet pipe 2, the first check valve is closed, the spring of the second check valve is opened by the liquid, and the liquid in the transition pipe is squeezed out by the plunger 5 to form a high-pressure water flow. The plunger 5 reciprocates to transport the liquid in the inlet pipe 2 to the outlet pipe.

[0035] The implementation principle of this application embodiment is as follows: When the motor pump is in normal use, the liquid pushes open the spring of the first one-way valve and enters the pump body 1 through the inlet pipe 2, starting the drive motor 22, which drives the reducer 26 at the output end of the drive motor 22 to start, and drives the output shaft 29 at the output end of the reducer 26 to rotate. Due to the misalignment of the axes of the output shaft 29 and the drive shaft 23, the drive shaft 23 drives the plunger 5 to reciprocate along the transition pipe 4 as the output shaft 29 rotates. During the movement, the plunger 5 draws the liquid in the inlet pipe 2 into the transition pipe 4. The liquid flows from the transition pipe 4 into the outlet pipe. The high-pressure liquid passes through the second one-way valve and the check valve 28 in sequence and is sprayed out from the nozzle 7 through the connecting pipe 6. At this time, the overflow device is in a sealed state. Refer to Figure 3 That is, the end of the valve core 11 facing the connecting pipe 6 is pressed against the first sealing ring 18;

[0036] When nozzle 7 becomes clogged or the operator closes the valve of the motor pump, the pressure in connecting pipe 6 and the outlet pipe increases sharply. (Refer to...) Figure 4High-pressure liquid passes through overflow hole 9 and inclined groove 21. At the same time, the liquid flow provides a force to valve core 11, pushing valve core 11 open and causing valve block 12 to squeeze elastic element 13. Valve core 11 retracts by about 2.5mm. When valve core 11 moves to contact the drive valve of micro switch 16, micro switch 16 is triggered to disconnect the circuit of drive motor 22, and drive motor 22 stops working. At the same time, there is a gap between valve block 12 and the wall of overflow groove 10 for liquid to pass through. After passing through overflow hole 9, inclined groove 21 and overflow groove 10 in sequence, the liquid enters liquid transfer channel 15 through pressure relief hole 14 to relieve pressure on connecting pipe 6 and water outlet pipe. Since liquid transfer channel 15 is connected to liquid inlet channel, the liquid is returned to liquid inlet channel.

[0037] Due to the release of pressure in connecting pipe 6 and the outlet pipe, valve core 11 returns approximately 0.5mm. (Refer to...) Figure 5 At this time, the valve block 12 is pressed against the second sealing ring 20, and the pressure in the connecting pipe 6 is about 2.0 MPa. The connecting pipe 6 is in a pressure-holding state, and the valve core 11 is in a balanced and static state under the pressure of the connecting pipe 6. At this time, the end of the valve core 11 facing the micro switch 16 is not in contact with the drive valve of the micro switch 16, and the drive motor 22 is in a closed state. When the valve gun is opened again or there is a leak in the pipe, the balance of the valve core 11 is broken, and the valve core 11 is reset under the action of the elastic element 13. At this time, the valve core 11 releases its contact with the micro switch 16, the micro switch 16 is opened, the drive motor 22 is restarted, and the motor pump works normally to output water.

[0038] The overflow device enables the motor pump to shut down, reducing the possibility of damage to the pump body 1 components caused by the inability to release internal pressure. This improves the overall durability and reliability of the motor pump and extends its service life.

[0039] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An electric motor pump, characterized in that: The system includes a pump body (1), which has an inlet pipe (2) and an outlet pipe (3). A transition pipe (4) connects the inlet pipe (2) and the outlet pipe (3). A plunger (5) is slidably connected in the transition pipe (4). The pump body (1) is equipped with a drive device for driving the plunger (5) to reciprocate along the transition pipe (4). The outlet end of the outlet pipe (3) is connected to a connecting pipe (6). A nozzle (7) is located at the outlet end of the connecting pipe (6). The connecting pipe (6) is equipped with an overflow device for returning the liquid in the connecting pipe (6) to the inlet pipe (2). When the liquid returns through the overflow device, the drive device is turned off.

2. The electric pump according to claim 1, characterized in that: The overflow device includes a housing (8) disposed on the connecting pipe (6), an overflow hole (9) communicating with the connecting pipe (6) is provided on the housing (8), an overflow groove (10) is provided on the wall of the overflow hole (9), a valve core (11) is slidably connected in the overflow hole (9), and a valve block (12) matching the overflow groove (10) is provided on the outer edge of the valve core (11). An elastic element (13) is pressed between the bottom of the overflow tank (10). A pressure relief hole (14) is provided on the tank wall of the overflow tank (10). The liquid outlet end of the pressure relief hole (14) is provided with a liquid transfer channel (15) that communicates with the liquid inlet pipe (2). A micro switch (16) connected to the drive device is provided on the housing (8). When the end of the valve core (11) facing the micro switch (16) contacts the micro switch (16), the drive device stops working.

3. The electric pump according to claim 2, characterized in that: The overflow hole (9) has a first sealing groove (17) on its wall. The first sealing groove (17) is provided with a first sealing ring (18) that matches the first sealing groove (17). The first sealing ring (18) is pressed between the valve core (11) and the first sealing groove (17).

4. The electric pump according to claim 3, characterized in that: The overflow groove (10) has a second sealing groove (19) on its wall. The second sealing groove (19) is located between the pressure relief hole (14) and the first sealing groove (17). The second sealing groove (19) is provided with a second sealing ring (20) that matches the second sealing groove (19).

5. The electric pump according to claim 2, characterized in that: An inclined groove (21) communicating with the overflow channel (10) is provided on the wall of the overflow hole (9).

6. The electric pump according to claim 5, characterized in that: The driving device includes a drive motor (22) mounted on the pump body (1). The output end of the drive motor (22) is provided with an output shaft (29). The end of the output shaft (29) away from the drive motor (22) is provided with a drive shaft (23). The axes of the drive shaft (23) and the output shaft (29) are misaligned. The outer edge of the plunger (5) is provided with a drive groove (24). The drive shaft (23) is rotatably connected in the drive groove (24). The drive shaft (23) is inserted into the inner edge of the drive shaft (23) bearing.

7. The electric pump according to claim 6, characterized in that: The output end of the drive motor (22) is provided with a reducer (26), and the output shaft (29) is located at the output end of the reducer (26).

8. The electric pump according to claim 6, characterized in that: A rolling bearing (27) is provided between the pump body (1) and the output shaft (29).

9. The electric pump according to claim 1, characterized in that: A first check valve is provided between the inlet pipe (2) and the transition pipe (4), and a second check valve is provided between the transition pipe (4) and the outlet pipe (3).

10. The electric pump according to claim 9, characterized in that: The liquid outlet pipe is equipped with a check valve (28), which is located between the second check valve and the connecting pipe (6).

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