Submersible pump

Abstract

The invention relates to the technical field of submersible pumps, and discloses a submersible pump which comprises a motor shell, a rotating shaft is coaxially arranged in the motor shell through a base, a communicating hole is formed in the base, a sand avoiding port used for leading water into the motor shell is formed in the outer side wall of the motor shell, and a filter screen used for blocking foreign matter is arranged in the sand avoiding port. An air gap for water to flow is further formed in the motor shell, a connecting table is further arranged in the motor shell, a plurality of floating force blades for pulling the water are arranged on the connecting table, and a liquid passing hole is coaxially formed in the rotating shaft. According to the invention, the water body in the motor shell continuously changes the flow direction, so that the water body impacts the filter screen in the sand avoiding port, that is, the water flow continuously shuttles the filter screen back and forth, and the effect of cleaning impurities on the surface of the filter screen is achieved; impurities attached to the surface of the filter screen in the sand avoiding port are flushed and separated from the filter screen under the reverse action of water flow.

Description

Technical Field

[0001] The present invention relates to the technical field of submersible pumps, and in particular to a submersible pump. Background Art

[0002] Submersible pumps are important equipment for deep well water extraction. When in use, the entire unit submerges in the water to extract groundwater to the surface. It is suitable for domestic water use, mine rescue, industrial cooling, farmland irrigation, seawater lifting, ship load adjustment and other fields. After the submersible pump is turned on, the impeller rotates at high speed, and the liquid in the submersible pump rotates with the blades, and then drives the liquid to pump to complete the deep well water extraction. However, this operation usually has the following problems:

[0003] First, the conventional submersible electric pump is large in size and has a large heat dissipation area, so the temperature rise in the motor cavity is not too high. However, the permanent magnet synchronous submersible electric pump is small in size, high in power, and has a small heat dissipation area, so that the temperature rise inside the motor is very high. The present invention adopts an open type to use well water circulation to cool the motor. When the well water enters the motor cavity, it also brings mud and sand into the motor, so that the motor cannot work well or even damages. If a sand shelter (filter) is added, the mud and sand will be blocked outside the filter, and the water entering the motor will not contain sand particles.

[0004] Secondly, during the operation of the motor, the thrust connecting block of the motor does not have fan blades. We have added blades to act as a propeller, so that the axial force generated by the operation of the water pump is offset by the thrust of the spiral blades, which greatly improves the overall efficiency and life of the motor.

[0005] For this purpose, we designed a submersible pump. Summary of the invention

[0006] The purpose of the present invention is to solve the problem of sand entering the motor cavity by adding a sand shelter (filter screen), so that sand and silt are blocked outside the filter screen, thereby solving the problem of silt entering the motor. The blades are added to act as propellers, so that the axial force generated by the water pump is offset by the thrust of the propeller blades, and a submersible pump is proposed.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A submersible pump comprises a motor housing, a rotating shaft is coaxially arranged in the motor housing through a base, a connecting hole is arranged on the base, an outer wall of the motor housing is provided with a sand-shielding port installed on the housing for introducing water into the motor cavity, and a filter screen is arranged in the sand-shielding port for blocking foreign matter, an air gap for water flow is also arranged in the motor housing, a connecting platform is also arranged in the motor housing, and a plurality of buoyancy blades for pulling water are arranged on the connecting platform, a liquid-passing hole is coaxially arranged in the rotating shaft, and a water outlet connected to the liquid-passing hole is also arranged on the rotating shaft.

[0009] Preferably, the upper and lower sides of the floating blade are respectively an upper cavity and a lower cavity.

[0010] Preferably, the rotating shaft rotates in the motor housing through the stator and the rotor, the connecting platform is rotationally connected to the rotor, and the air gap is located between the stator and the rotor.

[0011] Preferably, a plurality of the floating force blades are arranged in a circle on the outer wall of the connecting platform, and the floating force blades rotate on the outer wall of the rotating shaft through a connecting shaft that passes through the connecting platform. An inner cavity is opened on the rotating shaft, and one end of the connecting shaft extends into the inner cavity. The inner cavity is provided with a telescopic and sliding positioning rod, and the positioning rod positions the floating force blades through the socket.

[0012] Preferably, a first bevel gear is provided on the side of the connecting shaft extending into the inner cavity, a second bevel gear meshing with the first bevel gear is raised and lowered in the inner cavity, a telescopic plate passing through the rotating shaft is provided below the second bevel gear, and an inclined surface is provided on the top of the telescopic plate.

[0013] Preferably, the telescopic plate is connected to the positioning rod via a transverse plate, a reset spring for resetting and retracting the positioning rod is provided on the transverse plate, and a chamfer is provided on the side of the floating force blade facing the positioning rod.

[0014] Preferably, the liquid hole in the rotating shaft is provided with a rotating base, and a plurality of swinging blades are provided on the rotating base, and the swinging blades swing along the axial direction on the rotating base through elastic ropes, and the swinging blades swing on the rotating base through connecting rods and rotating disks.

[0015] Preferably, a lifting chamber is provided on the rotating base, and a plurality of first connecting tubes connected to the lifting chamber are provided on the outer wall of the rotating base, a rotating ring is rotated on the inner wall of the rotating shaft, and the first connecting tube passes through the rotating ring and extends into the inner chamber, a second connecting tube is fixed to the bottom of the first connecting tube, and a telescopic rod fixed to the second bevel gear is telescopically provided in the second connecting tube.

[0016] Preferably, a swing plate is fixed on the rotating disk, and the swing plate is located in the lifting cavity, and a lifting disk is coaxially arranged in the lifting cavity to abut against the swing plate.

[0017] Preferably, a plurality of discrete ropes are arranged in the first connecting tubes, one end of the discrete rope is connected to the second bevel gear, and the other end extends into the lifting cavity, and the plurality of discrete ropes are twisted into a twisted rope, and the twisted rope is connected to the bottom of the lifting plate.

[0018] The beneficial effects of the present invention are:

[0019] 1. In the present invention, since the water in the motor housing continuously changes its flow direction, it will impact the filter screen located in the sand shelter, that is, the water flow continuously shuttles back and forth through the filter screen, thereby cleaning the debris on the surface of the filter screen, that is, the debris attached to the surface of the filter screen located in the sand shelter is washed away by the reverse water flow and separated from the filter screen.

[0020] 2. In the present invention, when the floating blade rotates, the chamfer on the surface will hit the positioning rod, and then the floating blade will slide against it along the connecting shaft. When the socket on the floating blade rotates to the position of the positioning rod, the positioning rod will re-position the floating blade under the action of the tension spring, thus completing the limit of the floating blade, ensuring that the rotation of the floating blade drives the fluid to be squeezed out through the liquid hole and ensuring the normal circulation of the water body, that is, when encountering a blockage, it can play a role of automatic silt removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a submersible pump proposed by the present invention;

[0022] Figure 2 A cross-sectional view of AA in a submersible pump proposed by the present invention;

[0023] Figure 3 This is a schematic structural diagram of a rotating shaft in a submersible pump proposed by the present invention;

[0024] Figure 4 It is a left and right isometric view of a rotating shaft of a submersible pump proposed by the present invention;

[0025] Figure 5 A schematic diagram of the internal structure of a liquid hole in a submersible pump proposed by the present invention;

[0026] Figure 6 for Figure 5 A schematic diagram of the structure enlargement at the center A;

[0027] Figure 7 for Figure 5 A schematic diagram of the structure enlarged at B in the middle;

[0028] Figure 8 for Figure 5 A schematic diagram of the structure enlarged at C in the middle;

[0029] Fig. 9A main cross-sectional view of a liquid passage hole in a submersible pump proposed by the present invention;

[0030] Fig.10 This is a schematic structural diagram of a rotating base in a submersible pump proposed by the present invention.

[0031] In the figure: 1. motor housing; 2. rotating shaft; 3. liquid hole; 4. floating blade; 5. connecting hole; 6. connecting platform; 7. upper cavity; 8. lower cavity; 9. sand shelter; 10. stator; 11. air gap; 12. rotor; 13. water outlet; 14. rotating base; 15. swinging fan blade; 16. connecting rod; 17. rotating disk; 18. elastic rope; 19. inner cavity; 20. rotating ring; 21. first connecting pipe; 22. second connecting pipe; 23. telescopic rod; 24. connecting shaft; 25. first bevel gear; 26. second bevel gear; 27. telescopic plate; 28. twisted rope; 29. ​​discrete rope; 30. lifting plate; 31. swing plate; 32. inclined surface; 33. horizontal plate; 34. reset spring; 35. positioning plug rod; 36. plug hole; 37. chamfer; 38. filter screen. DETAILED DESCRIPTION

[0032] Reference Figure 1-Figure 10 A submersible pump comprises a motor housing 1, a rotating shaft 2 is coaxially arranged in the motor housing 1 through a base, a connecting hole 5 is arranged on the base, an outer wall of the motor housing 1 is provided with a sand-avoiding port for introducing water into the cavity of the motor housing 1 and fixedly mounted on the motor housing 1, and a filter screen 38 for blocking foreign matter is arranged in the sand-avoiding port 9, an air gap 11 for water flow is also arranged in the motor housing 1, the rotating shaft 2 rotates in the motor housing 1 through a stator 10 and a rotor 12, a connecting platform 6 is rotatably connected to the rotor 12, the air gap 11 is located between the stator 10 and the rotor 12, a liquid-passing hole 3 is coaxially arranged in the rotating shaft 2, and a water outlet 13 communicating with the liquid-passing hole 3 is also arranged on the rotating shaft 2, so as to refer to Figure 1 The water flow direction shown is the direction indicated by the arrow, that is, the water first passes through the filter screen 38, is drawn from the sand shelter 9 into the motor housing 1 from bottom to top, then passes through the air gap 11 and flows into the upper chamber 7 and the lower chamber 8, and then flows upward from the connecting hole 5 into the liquid hole 3 in the rotating shaft 2, and finally is discharged from the water outlet 13, thereby completing the extraction of the water.

[0033] It should be noted that during this process, the debris in the water will first be blocked on the filter net 38 to prevent the debris from entering the motor housing 1. At the same time, the flow of water from bottom to top can effectively reduce the flow of water, preventing more debris from flowing into the motor housing 1, and then the water will pass through the air gap 11 and flow into the vicinity of the buoyancy blade 4.

[0034] A connecting platform 6 is also provided in the motor housing 1, and a plurality of buoyancy blades 4 for pulling water are provided on the connecting platform 6. The rotation of the buoyancy blades 4 can drive the flow of water. It should be noted that the buoyancy blades 4 rotate downward during the pumping process, thus driving the water flow downward. The upper and lower sides of the buoyancy blades 4 are respectively an upper chamber 7 and a lower chamber 8. Therefore, during the rotation of the buoyancy blades 4, the water in the lower chamber 8 will be pressed into the liquid hole 3 in the rotating shaft 2 through the connecting hole 5, which will cause the water in the lower chamber 8 to enter the liquid hole 3 and accelerate the flow rate.

[0035] The buoyancy blades 4 in the water will generate buoyancy, thereby offsetting part of the axial force.

[0036] A plurality of float blades 4 are arranged in a circle on the outer wall of the connecting platform 6, and the float blades 4 rotate on the outer wall of the rotating shaft 2 through the connecting shaft 24 that penetrates the connecting platform 6. Therefore, as the float blades 4 rotate, the angle of the float blades 4 can be adjusted while the output rotation direction remains unchanged, so that the rotation of the float blades 4 can change the flow direction of the water. That is, when the float blades 4 rotate, the original trend of driving the water to flow downward will be changed to driving the water to flow upward. As the float blades 4 continue to rotate, the water in the motor housing 1 will continuously change its flow direction.

[0037] It should be noted that, since the water in the motor housing 1 constantly changes its flow direction, it will impact the filter 38 located in the sand shelter 9, that is, the water flows continuously back and forth through the filter 38, thereby cleaning the debris on the surface of the filter 38, that is, the debris attached to the surface of the filter 38 in the sand shelter 9 is washed away by the reverse water flow and separated from the filter 38.

[0038] Reference Figure 5 and Figure 6 In the state, the liquid hole 3 in the rotating shaft 2 is provided with a rotating base 14, and a plurality of swinging blades 15 are provided on the rotating base 14. The swinging blades 15 swing on the rotating base 14 through the connecting rod 16 and the rotating disk 17. Therefore, under the impact of the water flow, the following two functions can be played:

[0039] First, flushing on the swinging blades 15 can drive the rotating base 14 to rotate. Since a lifting cavity is provided on the rotating base 14, and a plurality of first connecting tubes 21 connected to the lifting cavity are provided on the outer wall of the rotating base 14, and a rotating ring 20 is rotated on the inner wall of the rotating shaft 2, the first connecting tube 21 can also drive the rotating ring 20 to rotate together, and at the same time, the second bevel gear 26 in the inner cavity 19 can also be driven to rotate together through the second connecting tube 22 and the telescopic rod 23.

[0040] Secondly, since the swinging blades 15 swing along the axis direction of the rotating base 14 through the elastic rope 18, the swinging blades 15 will swing in the direction of the water flow under the impact of the water flow. That is, when the debris attached to the surface of the filter screen 38 causes the water flow velocity to decrease, the impact force on the swinging blades 15 will become smaller. Under the pulling force of the elastic rope 18, the swinging part of the swinging blades 15 will return to its original position, eventually causing the twisted rope 28 to be pulled.

[0041] Reference Figure 5 and Figure 7 In this state, the first connecting tube 21 passes through the rotating ring 20 and extends into the inner cavity 19, a second connecting tube 22 is fixed to the bottom of the first connecting tube 21, a telescopic rod 23 fixed to the second bevel gear 26 is telescopically arranged in the second connecting tube 22, an inner cavity 19 is opened on the rotating shaft 2, and one end of the connecting shaft 24 extends into the inner cavity 19, so the rotation of the rotating base 14 will drive the second bevel gear 26 to rotate together through the rigidly connected first connecting tube 21, the second connecting tube 22 and the telescopic rod 23.

[0042] Reference Fig.10 In this state, a swing plate 31 is fixed on the rotating disk 17, and the swing plate 31 is located in the lifting chamber, and a lifting disk 30 is coaxially arranged in the lifting chamber to resist the swing plate 31. When the water flow velocity decreases, the impact force on the swinging blade 15 will become smaller, and under the pulling force of the elastic rope 18, the swinging part of the swinging blade 15 will return to its original position, which will cause the rotating disk 17 to rotate, which will cause the swing plate 31 to lift the lifting disk 30, and then pull the twisted rope 28 at the bottom to pull it up.

[0043] Discrete ropes 29 are arranged in multiple first connecting tubes 21, one end of the discrete rope 29 is connected to the second bevel gear 26, and the other end extends into the lifting cavity. Multiple discrete ropes 29 are twisted into a twisted rope 28, and the twisted rope 28 is connected to the bottom of the lifting plate 30. Therefore, the lifting and lowering of the lifting plate 30 will be transmitted to the second bevel gear 26 through the discrete rope 29. The connecting shaft 24 extends into the inner cavity 19 on one side and is provided with a first bevel gear 25. The second bevel gear 26 meshing with the first bevel gear 25 is lifted and lowered in the inner cavity 19, and then the second bevel gear 26 is lifted and lifted, and the second bevel gear 26 is meshed with the first bevel gear 25 for transmission.

[0044] Reference Figure 8State, wherein a telescopic plate 27 penetrating the rotating shaft 2 is provided below the second bevel gear 26, and an inclined surface 32 is provided on the top of the telescopic plate 27. It should be noted that when the second bevel gear 26 is not lifted, the telescopic plate 27 is pushed out by the second bevel gear 26, and the telescopic plate 27 is connected to the positioning plug rod 35 through the cross plate 33. The cross plate 33 is provided with a reset spring 34 for resetting the positioning plug rod 35. At this time, the positioning plug rod 35 is inserted into the socket 36 on the floating force blade 4, and the floating force blade 4 will not rotate. In this state, the floating force blade 4 drives the water flow downward;

[0045] When the second bevel gear 26 is lifted by the discrete rope 29, the inner cavity 19 is provided with a telescopic sliding positioning rod 35, and the positioning rod 35 positions the floating force blade 4 through the socket 36. The telescopic plate 27 loses its supporting force and will retract into the inner cavity 19 under the action of the reset spring 34. At the same time, it will carry the positioning rod 35 out of the socket 36 on the floating force blade 4 and release the rotation limit of the floating force blade 4.

[0046] When the second bevel gear 26 meshes with the first bevel gear 25 for transmission, the buoyancy blade 4 will be driven to rotate. When the output rotation direction remains unchanged, the angle of the buoyancy blade 4 can be adjusted to change the flow direction of the water body caused by the rotation of the buoyancy blade 4. That is, when the buoyancy blade 4 rotates, the original trend of driving the water body to flow downward will be changed to driving the water body to flow upward. As the buoyancy blade 4 continues to rotate, the water body in the motor housing 1 will continuously change its flow direction.

[0047] In this way, when the filter screen 38 is blocked by debris, the flow rate is reduced, which triggers the floating blade 4 to rotate, constantly changing the flow direction of the water on the filter screen 38 and playing the role of cleaning the debris on the filter screen 38. When the debris on the filter screen 38 is cleaned, the flow rate of the circulating water returns to normal;

[0048] Then the liquid hole 3 with restored water flow rate will impact the swinging blade 15 on the rotating base 14 again. When the water flows upward through the liquid hole 3, it will push the swinging blade 15 to swing upward again. Then the second bevel gear 26, without the restriction of the discrete rope 29 and under the action of gravity, falls down and squeezes the inclined surface 32, and re-pushes the telescopic plate 27. At this time, the positioning rod 35 is not inserted into the socket 36.

[0049] The connecting shaft 24 and the floating force blade 4 are telescopically slid by the tension spring, and the floating force blade 4 is provided with a chamfer 37 on the side facing the positioning rod 35. Therefore, when the floating force blade 4 rotates, the chamfer 37 on the surface will hit the positioning rod 35, and then the floating force blade 4 will slide against the connection shaft 24. When the socket 36 on the floating force blade 4 is rotated to the position of the positioning rod 35, the positioning rod 35 will re-position the floating force blade 4 under the action of the tension spring, thus completing the limit of the floating force blade 4, ensuring that the rotation of the floating force blade 4 drives the fluid to be squeezed out through the liquid hole 3, and ensuring the normal circulation of the water body, that is, when encountering a blockage state, it can play a role of automatic dredging.

[0050] The working principle of the present invention is as follows:

[0051] Reference Figure 1 The water flow direction shown is the direction indicated by the arrow, that is, the water first passes through the filter screen 38, is drawn from the sand shelter 9 into the motor housing 1 from bottom to top, then passes through the air gap 11 and flows into the upper chamber 7 and the lower chamber 8, then flows upward from the connecting hole 5 into the liquid hole 3 in the rotating shaft 2, and finally is led out from the water outlet 13, thereby completing the extraction of the water;

[0052] During this process, when the filter screen 38 is blocked, the floating blade 4 rotates, and the angle of the floating blade 4 can be adjusted while the output rotation direction remains unchanged, so that the rotation of the floating blade 4 can change the flow direction of the water body, that is, when the floating blade 4 rotates, the original tendency of driving the water body to flow downward will be changed to driving the water body to flow upward, and as the floating blade 4 continues to rotate, the water body in the motor housing 1 will continuously change its flow direction;

[0053] As the water in the motor housing 1 continuously changes its flow direction, it will impact the filter 38 in the sand shelter 9, that is, the water will continuously shuttle back and forth through the filter 38, thereby cleaning the debris on the surface of the filter 38, that is, the debris attached to the surface of the filter 38 in the sand shelter 9 will be washed away by the reverse water flow and separated from the filter 38.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A submersible pump, comprising a motor housing (1), characterized in that: A rotating shaft (2) is coaxially arranged in the motor housing (1) through the base, and a connecting hole (5) is arranged on the base. A sand-avoiding port (9) for introducing water into the motor housing (1) is arranged on the outer wall of the motor housing (1), and a filter screen (38) for blocking foreign matter is arranged in the sand-avoiding port (9). An air gap (11) for water flow is also arranged in the motor housing (1). A connecting platform (6) is also arranged in the motor housing (1), and a plurality of floating blades (4) for pulling water are arranged on the connecting platform (6). A liquid-passing hole (3) is coaxially arranged in the rotating shaft (2), and a water outlet (13) communicating with the liquid-passing hole (3) is also arranged on the rotating shaft (2).

2. A submersible pump according to claim 1, characterized in that: The upper and lower sides of the floating blade (4) are respectively an upper cavity (7) and a lower cavity (8).

3. A submersible pump according to claim 1, characterized in that: The rotating shaft (2) rotates in the motor housing (1) through the stator (10) and the rotor (12); the connecting platform (6) is rotationally connected to the rotor (12); and the air gap (11) is located between the stator (10) and the rotor (12).

4. A submersible pump according to claim 3, characterized in that: A plurality of the floating force blades (4) are arranged in a circle on the outer wall of the connecting platform (6), and the floating force blades (4) rotate on the outer wall of the rotating shaft (2) through a connecting shaft (24) that passes through the connecting platform (6). An inner cavity (19) is provided on the rotating shaft (2), and one end of the connecting shaft (24) extends into the inner cavity (19). The inner cavity (19) is provided with a telescopic and sliding positioning rod (35), and the positioning rod (35) positions the floating force blade (4) through the insertion hole (36).

5. A submersible pump according to claim 4, characterized in that: A first bevel gear (25) is arranged on one side of the connecting shaft (24) extending into the inner cavity (19); a second bevel gear (26) meshing with the first bevel gear (25) is lifted and lowered in the inner cavity (19); a telescopic plate (27) penetrating the rotating shaft (2) is arranged below the second bevel gear (26); and an inclined surface (32) is arranged on the top of the telescopic plate (27).

6. A submersible pump according to claim 5, characterized in that: The telescopic plate (27) is connected to the positioning rod (35) via a transverse plate (33), and a reset spring (34) for resetting and retracting the positioning rod (35) is provided on the transverse plate (33). The floating blade (4) is provided with a chamfer (37) on the side facing the positioning rod (35).

7. A submersible pump according to claim 6, characterized in that: The liquid passage hole (3) in the rotating shaft (2) is provided with a rotating base (14), and a plurality of swinging blades (15) are provided on the rotating base (14), and the swinging blades (15) swing along the axis direction on the rotating base (14) through elastic ropes (18), and the swinging blades (15) swing on the rotating base (14) through connecting rods (16) and rotating disks (17).

8. A submersible pump according to claim 7, characterized in that: The rotating base (14) is provided with a lifting chamber, and the outer wall of the rotating base (14) is provided with a plurality of first connecting tubes (21) connected with the lifting chamber. A rotating ring (20) is rotatably provided on the inner wall of the rotating shaft (2), and the first connecting tube (21) penetrates the rotating ring (20) and extends into the inner chamber (19). A second connecting tube (22) is fixed at the bottom of the first connecting tube (21), and a telescopic rod (23) fixed to a second bevel gear (26) is telescopically provided in the second connecting tube (22).

9. A submersible pump according to claim 8, characterized in that: A swing plate (31) is fixed on the rotating disk (17), and the swing plate (31) is located in the lifting chamber. A lifting disk (30) is coaxially arranged in the lifting chamber and abuts against the swing plate (31).

10. A submersible pump according to claim 9, characterized in that: A plurality of discrete ropes (29) are arranged in the first connecting tubes (21), one end of the discrete rope (29) is connected to the second bevel gear (26), and the other end extends into the lifting chamber. The plurality of discrete ropes (29) are twisted into a twisted rope (28), and the twisted rope (28) is connected to the bottom of the lifting plate (30).

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